WO2023002655A1 - Vertical injection molding apparatus - Google Patents
Vertical injection molding apparatus Download PDFInfo
- Publication number
- WO2023002655A1 WO2023002655A1 PCT/JP2022/006083 JP2022006083W WO2023002655A1 WO 2023002655 A1 WO2023002655 A1 WO 2023002655A1 JP 2022006083 W JP2022006083 W JP 2022006083W WO 2023002655 A1 WO2023002655 A1 WO 2023002655A1
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- WIPO (PCT)
- Prior art keywords
- cylinder
- injection
- screw
- vertical
- molding apparatus
- Prior art date
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 101
- 239000007924 injection Substances 0.000 claims abstract description 101
- 239000000463 material Substances 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 239000011347 resin Substances 0.000 claims abstract description 43
- 229920005989 resin Polymers 0.000 claims abstract description 43
- 238000007599 discharging Methods 0.000 claims 1
- 238000005303 weighing Methods 0.000 description 6
- 239000004519 grease Substances 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000011344 liquid material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
Definitions
- the present invention relates to a technology that can reduce the height of a vertical injection molding apparatus.
- the injection molding apparatus is mainly composed of a mold clamping device that clamps the mold while opening and closing the mold, and an injection device that injects a resin material into the clamped mold.
- An apparatus with a horizontal mold clamping axis is called a horizontal injection molding apparatus, and an apparatus with a vertical mold clamping axis is called a vertical injection molding apparatus.
- Patent Document 1 Fig. 9
- FIG. 10 is a diagram showing the overall configuration of a conventional vertical injection molding apparatus.
- the vertical injection molding apparatus 100 includes a mold clamping shaft 101 that is vertical, a mold clamping device 110 that clamps the mold 102 while opening and closing it, and an injection device 120 that injects a resin material into the clamped mold 102. and are the main elements.
- the mold clamping device 110 includes a fixed platen 112 mounted on a machine base 111, a movable platen 113 arranged on the fixed platen 112 so as to be vertically movable, and a fixed platen 112 extending downward from the movable platen 113. It consists of a tie bar 114 that passes through and a toggle mechanism 115 that raises and lowers the tie bar 114 .
- the injection device 120 includes a heating cylinder 121 arranged on a movable platen 113, an injection machine moving cylinder 122 for moving the heating cylinder 121 up and down, a screw 123 incorporated in the heating cylinder 121, and the screw 123.
- a screw rotation motor 124 for turning and an injection motor 125 for moving the screw 123 along the vertical axis (mold clamping axis 101) are the main elements.
- the resin material put into the heating cylinder 121 is plasticized and weighed by rotating the screw 123 with the screw rotation motor 124 .
- the heating cylinder 121 is lowered by the injection machine moving cylinder 122 , and the tip (lower end) nozzle 126 is brought into contact with the mold 102 .
- the injection motor 125 lowers the screw 123 along the vertical axis to inject the resin material into the mold 102 .
- the vertical injection molding apparatus 100 having such a structure is widely used because of the fact that a plurality of apparatuses can be installed side by side because of the small floor space.
- the height (total height) H1 of the vertical injection molding apparatus 100 is considerably large. If it cannot be installed in the existing building, it is necessary to build a new building or remodele it significantly.
- An object of the present invention is to provide a vertical injection molding apparatus whose height is significantly reduced.
- the invention according to claim 1 is composed of a mold clamping device having a vertical mold clamping axis for clamping a mold, and an injection device disposed on the mold clamping device for injecting a resin material into the mold.
- a vertical injection molding device comprising: The injection device includes a heating cylinder that incorporates a rotatable screw and heats the resin material to a predetermined temperature while agitating it; a material storage member that is connected to the heating cylinder and stores the resin material; a nozzle provided and extending to the mold; and an injection cylinder provided in the material storage member for injecting the resin material from the nozzle, A screw shaft of the screw extends vertically, A cylinder axis of the injection cylinder extends horizontally.
- the invention according to claim 2 is the vertical injection molding apparatus according to claim 1, L/D does not exceed 3, where L is the effective length of the screw and D is the outer diameter of the screw.
- the invention according to claim 3 is the vertical injection molding apparatus according to claim 2,
- the L/D is 1.0.
- the invention according to claim 4 is the vertical injection molding apparatus according to claim 1,
- the heating cylinder has an outlet through which the resin material flows out and an outlet valve for opening and closing the outlet, and the outlet valve is moved by an outlet valve driving mechanism.
- the invention according to claim 5 is the vertical injection molding apparatus according to any one of claims 1 to 4,
- the injection device includes an injection platen arranged above the mold clamping device, a screw drive platen arranged above the injection platen for suspending the heating cylinder and the injection cylinder, and the injection platen and the screw drive platen. and an injection positioning mechanism that moves vertically,
- the injection positioning mechanism comprises a cylinder and a piston rod that moves axially with respect to the cylinder,
- the cylinder also serves as a connecting member that connects the screw drive platen to the injection platen.
- the invention according to claim 6 is the vertical injection molding apparatus according to claim 1, the injection cylinder comprises a plunger,
- the material storage member includes a first horizontal cylinder that accommodates the plunger while extending horizontally, a vertical cylinder that extends downward from the tip of the first horizontal cylinder, and a vertical cylinder that extends from the middle in the height direction to the heating cylinder. and a second horizontal tube.
- the heating cylinder and the screw are arranged to extend vertically, and the injection cylinder is arranged to extend horizontally.
- the heating cylinder vertically, the liquid resin material can be accumulated at the bottom of the heating cylinder while uniformly heating the resin material.
- the entire injection cylinder is long.
- the height dimension of the injection device can be reduced.
- the height dimension of the injection device can be reduced while maintaining the quality of the resin material. That is, the present invention provides a vertical injection molding apparatus with a low height.
- the L/D of the screw does not exceed 3.
- L/D is 1.0. If the effective length L of the screw is 1.0, the length of the screw will be sufficiently short and the height dimension of the injection device can be made smaller.
- the heating cylinder has an outlet through which the resin material flows out at the bottom and an outlet valve for opening and closing the outlet, and the outlet valve is forcibly moved by the outlet valve driving mechanism. Even if a check valve is provided at the outlet of the heating cylinder, backflow of the resin material can be prevented. However, if the residue of the resin material accumulates on the essential parts of the check valve, the check valve leaks and the backflow prevention function is deteriorated.
- the outlet valve is forcibly moved by the outlet valve driving mechanism. A forcibly moved outlet valve extrudes or scrapes off resin material debris. As a result, highly reliable anti-backflow action can be maintained for a long period of time.
- the cylinder of the injection positioning mechanism also serves as a connecting member that connects the screw drive plate to the injection plate.
- the present invention can reduce the number of parts and reduce the weight of the injection device.
- the material storage member includes a first horizontal cylinder that extends horizontally and stores the plunger, a vertical cylinder that extends downward from the tip of the first horizontal cylinder, and a middle cylinder in the height direction of the vertical cylinder. and a second horizontal tube extending from to the heating tube.
- the injection cylinder can be placed horizontally in the middle of the heating cylinder in the height direction, and the injection device can be made compact.
- FIG. 2 is a view taken along line 2-2 of FIG. 1; 1 is a cross-sectional view of an injection device according to the present invention; FIG. It is a figure explaining an effect
- FIG. 6 is an expanded view of a cross section taken along line 7-7 of FIG. 5; FIG.
- FIG. 4 is a flow chart explaining the operation of the injection device; It is a figure explaining the height of a vertical injection molding apparatus, (a) is a figure explaining a comparative example, (b) is a figure explaining an Example. It is a figure which shows the whole structure of the conventional vertical injection molding apparatus.
- extension means advancing the piston rod to extend the entire length of the cylinder
- retract means retracting the piston rod to shorten the entire length of the cylinder
- a vertical injection molding apparatus 10 includes a mold clamping device 20 having a vertical mold clamping shaft 20a for clamping a mold 12 consisting of a lower mold 13 and an upper mold 14;
- the main element of this device is an injection device 50 arranged above the mold clamping device 20 .
- the mold clamping device 20 includes a bed 21 fixed to a floor (or a machine base) 16, a pressure receiving plate 22 fixed to the bed 21, a turntable 23 placed on the pressure receiving plate 22, and a platen below the pressure receiving plate 22. a half nut 26 arranged under the traction board 25; a movable board 28 arranged above the pressure receiving board 22; 25, and a pump/motor unit 32 that supplies pressurized oil to the half nut position adjusting mechanism 24, the mold opening/closing mechanism 27, etc. while controlling it.
- the traction board 25 is moved up and down by a half nut position adjusting mechanism 24 provided on the pressure receiving board 22 .
- the movable platen 28 is moved up and down by a mold opening/closing mechanism 27 provided on the pressure receiving platen 22 .
- the half nut position adjusting mechanism 24 is preferably a half nut position adjusting hydraulic cylinder 24A.
- the mold opening/closing mechanism 27 is preferably a mold opening/closing hydraulic cylinder 27A.
- the pressure receiving plate 22 can be removed from the bed 21 by loosening bolts or the like. Therefore, "fixation” in the present invention includes not only complete fixation but also separably bonded forms. Also, the half nut position adjusting mechanism 24 and the mold opening/closing mechanism 27 may be provided on the bed 21 without any problem.
- the traction board 25 has, for example, a mold clamping cylinder 33 that opens upward.
- a piston portion 34 extending downward from the pressure receiving platen 22 is accommodated in the mold clamping cylinder 33 .
- a pressure oil chamber 35 is formed between the mold clamping cylinder 33 and the piston portion 34 . When pressure oil is supplied to the pressure oil chamber 35, the traction board 25 is lowered.
- the tie bar 31 is provided with an engaging portion 36 at its lower end.
- This engaging portion 36 is, for example, a sawtooth portion.
- the engaging portion 36 is read as the sawtooth portion 36 .
- the half nut 26 is a half-split nut that engages (engages) with the sawtooth portion 36 as an engaging portion.
- the half nut 26 is opened and closed by a half nut opening/closing mechanism 37 provided on the traction board 25 .
- the half nut opening/closing mechanism 37 is preferably a half nut opening/closing hydraulic cylinder 37A.
- the teeth of the saw-toothed portion 36 are arranged at an equal pitch like bamboo joints.
- the teeth may be rectangular, trapezoidal, or triangular in cross section.
- the half nut 26 is provided with corresponding teeth.
- the tie bar 31 and half nut 26 are made of tough and hard steel. Grease lubrication is provided between the serrations 36 and the half nut 26 to facilitate steel-to-steel contact. At a position higher than the sawtooth portion 36, the outer peripheral surface of the tie bar 31 is lubricated. The grease runs down and reaches the serrations 36 . Greasing may be automatic or manual.
- a half nut operation monitoring mechanism 38 for monitoring the operation of the half nut 26 is provided near the half nut 26.
- the half nut operation monitoring mechanism 38 may be omitted.
- Proximity switch is a non-contact sensor that determines "object is present” when the mating metal approaches within a certain distance, and "no object” when the mating metal is beyond a certain distance.
- the half nut 26 is wet with waste grease, but if it is a non-contact type sensor, there is no fear of erroneous detection. Moreover, it is inexpensive. Proximity switches are therefore recommended.
- a tray 41 for receiving waste grease is preferably placed below the half nuts 26 and on the floor 16 .
- the tray 41 is a dish-shaped container. Regularly or as needed, the tray 41 is pulled out and accumulated waste grease is treated to prevent the floor 16 from being soiled.
- the bed 21 is surrounded by a cover 42.
- This cover 42 serves as a safety cover.
- the cover 42 is not essential because it can be replaced by a safety fence or the like.
- FIG. 2 is a view taken along arrow 2-2 in FIG.
- the tie bars 31 are arranged at the vertices of each triangle. Among them, one tie bar 31 constitutes the center of rotation of the turntable 23 .
- the resin molded product is taken out from the lower mold 13 .
- the empty lower mold 13 is moved to the mold clamping position 18 by rotating the turntable 23 by 180°. Since the work of removing the product and the work of clamping the mold can be performed in parallel, the use of the turntable 23 can improve productivity.
- the turntable 23 can be replaced with a carriage that reciprocates between the mold clamping position 18 and the product unloading position 17 .
- the turntable 23 and the carriage may be omitted. Also in this case, it is desirable to use four tie bars 31 .
- the number of tie bars 31 can be freely determined, and whether or not the turntable 23 is provided and whether or not the carriage is provided is optional.
- the half nut 26 is opened and separated from the serrated portion 36.
- the mold opening/closing mechanism 27 is extended to raise the movable platen 28 .
- the upper die 14 separates from the lower die 13 and the tie bars 31 rise.
- the injection device 50 includes an injection platen 51 arranged above the movable platen 28 at a predetermined distance from the movable platen 28, and an injection platen 51 with a piston rod 52a extending downward.
- a screw drive platen 53 arranged above the injection platen 51 at a constant distance from the injection platen 51 so as to be connected by a cylinder 52b of the injection positioning mechanism 52;
- An injection cylinder 54, a screw rotating motor 55 and a heating cylinder 56 attached to the screw drive plate 53, and a material storage member 58 spanning the injection cylinder 54 and the heating cylinder 56 and having a nozzle 57 at its lower end are main elements.
- the injection cylinder 54 is fixed to the screw driving platen 53 with bolts or the like. It should be noted that there is no problem in fixing the injection cylinder 54 to the lower injection plate 51 by inserting a leg (or a spacer or a seat) between the injection cylinder 54 and the lower injection plate 51 . Since the injection cylinder 54 is a strength member with high rigidity, it serves as a connecting member between the injection platen 51 and the screw driving platen 53 .
- the injection cylinder 54 incorporates a piston 61 , and a plunger 62 extends from one surface of the piston 61 into the material storage member 58 .
- a rod 63 extends from the other surface of the piston 61 to the outside of the cylinder. The position of this rod 63 is monitored by a weighing sensor 64 . That is, the rod 63 and the weighing sensor 64 detect that the plunger 62 has retreated and the "weighing" of the resin material has been completed.
- the injection cylinder 54 is preferably a hydraulic cylinder, and is arranged so that the cylinder shaft 54a is horizontal.
- the injection cylinder 54 becomes longer when the piston rod (plunger 62) is included. By placing the long injection cylinder 54 horizontally, the height dimension from the injection platen 51 to the screw driving platen 53 can be reduced.
- a servomotor is suitable for the screw rotation motor 55 .
- a small-diameter pulley 65 is provided on the motor shaft of the screw rotating motor 55, a large-diameter pulley 67 is provided on the screw 66, and a belt 68 is passed between the pulleys.
- the pulley diameter of the large-diameter pulley 67 is five to ten times the pulley diameter of the small-diameter pulley 65 . Then, the speed reduction ratio becomes 1/5 to 1/10, and the screw 66 is rotated at low speed.
- Belt 68 is preferably a timing belt.
- the heating cylinder 56 is fixed to the screw driving plate 53 with a bolt or the like such that the shaft (screw shaft 66a) is vertical. Further, the screw 66 is rotatably attached to the screw drive platen 53 via a bearing 71 .
- the screw 66 may be configured to be movable in the axial direction (vertical direction) by a predetermined distance.
- the heating cylinder 56 has a hopper 72 , and the resin material is put into the heating cylinder 56 using the hopper 72 .
- the hopper 72 is arranged at a location that does not interfere with the large-diameter pulley 67 and belt 68 .
- FIG. 3 the nozzle 57 is touching the mold (FIG. 1, reference numeral 12). From this state, the ejection positioning mechanism 52 is extended. Then, the ejection platen 51 and the like move upward so as to separate from the movable platen 28 . As a result, the nozzle 57 is sufficiently separated from the mold, as shown in FIG. When the injection positioning mechanism 52 is retracted, it returns to FIG. 4 uses the reference numerals of FIG. 3, and detailed description thereof is omitted.
- the cylinder 52b of the injection positioning mechanism 52 also serves as a connecting member for connecting the screw driving platen 53 to the injection platen 51. As shown in FIG. If a connecting member that connects the screw driving platen 53 to the injection platen 51 is provided separately from the cylinder 52b, the weight of the separately provided connecting member increases, and the weight of the injection device 50 increases. On the other hand, in the present embodiment, since a connecting member is not provided separately, the weight of the injection device 50 can be reduced while reducing the number of parts.
- the material storage member 58 includes a first horizontal cylinder 74 that extends horizontally and houses the plunger 62 , and a vertical cylinder that extends downward from the tip of the first horizontal cylinder 74 and houses the shut valve 75 . It consists of a tube 76 and a second horizontal tube 77 extending from the middle of the vertical tube 76 in the height direction to the heating tube 56 .
- the plunger 62 can be placed horizontally at a height in the middle of the heating cylinder 56 in the height direction. That is, as shown in FIG. 4, the injection cylinder 54 can be placed horizontally in the middle of the heating cylinder 56 in the height direction, and the height dimension of the injection device 50 can be reduced.
- a heater 78 is wound around the outer periphery of the heating cylinder 56, and the heater 78 keeps the heating cylinder 56 at a predetermined temperature.
- a heater 84 is wound around the outer periphery of the material storage member 58, and the heater 84 keeps the material storage member 58 at a predetermined temperature.
- a shut valve drive mechanism 79 is provided on the upper surface of the vertical tube 76, and the shut valve drive mechanism 79 moves the shut valve 75 from the valve closed position to the valve open position.
- the pressure receiving block 89 is lowered from the screw driving platen 53.
- the pressure receiving block 89 prevents the material storage member 58 (particularly the vertical tube 76) from moving upward.
- a pressure receiving block 89 can receive the back pressure (or upward force) when the nozzle 57 touches the mold ( FIG. 1 , reference numeral 12 ).
- An outlet passage 81 connected to the outlet 56c and the second horizontal cylinder 77 is provided at the bottom of the heating cylinder 56, and an outlet valve 82 is placed in the outlet passage 81.
- the outlet valve 82 is moved from the valve closed position to the valve open position by the outlet valve drive mechanism 83 .
- the outlet valve 82 is forcibly moved by the outlet valve driving mechanism 83 .
- the forcibly moved outlet valve 82 extrudes or scrapes off the residue of the resin material.
- the screw 66 is an ultra-short screw, and when L is an effective length and D is an outer diameter, L/D is approximately 1.0 in the embodiment. That is, L and D were determined while securing the length of the spiral groove provided on the outer periphery of the screw 66 . If the L/D of the screw 66 is 1.0, the length of the screw 66 is sufficiently short and the height dimension of the injection device 50 can be made smaller.
- screws used in injection devices have an L/D of 10 to 20 and an outer diameter D of small diameter.
- a long screw with a small diameter is rotated at high speed.
- the screw 66 according to the present invention has a much larger outer diameter D and a much shorter length L.
- the resin material moves along the spiral groove formed on the outer periphery by the screw 66.
- the peripheral speed of the screw 66 is directly proportional to the outer diameter D.
- the screw 66 according to the present invention can be rotated at a sufficiently low speed.
- the L/D of the screw 66 is not limited to 1.0. According to studies by the present inventors, any L/D in the range of 0.5 to 3.0 can be adopted. If L/D is less than 0.5, the effective length L becomes too small to form a sufficient number of spiral grooves on the outer periphery. Further, when L/D exceeds 3.0, it is necessary to widen the distance between the injection platen 51 and the screw drive platen 53 shown in FIG. Therefore, the L/D of the screw 66 should be in the range of 0.5 to 3.0, preferably 1.0.
- the tip (lower end) of the screw 66 may be formed into a conical surface, and a spiral groove may be provided in this conical surface.
- the rotating spiral groove can impart a swirling force to the liquid resin material accumulated at the bottom of the heating cylinder 56 .
- the swirling force further agitates the liquid resin material, thereby achieving further uniformity of temperature and further homogenization of the material.
- the screw 66 and the heating cylinder 56 are arranged so that the screw shaft 66a is horizontal (comparative example).
- the upper portion 56b becomes hotter than the lower portion 56a. That is, a temperature difference inevitably occurs in the vertical direction. As a result, temperature unevenness occurs in the resin material, which is not preferable.
- the resin material which used to be a solid material, is softened by being kneaded and compressed while being heated, and becomes a liquid material. This liquid material accumulates near the lower portion 56 a of the heating cylinder 56 . It becomes difficult to smoothly exit from the outlet 56c of the heating cylinder 56.
- the screw 66 and the heating cylinder 56 are arranged so that the screw shaft 66a is vertical (example).
- the liquid material collects at the bottom of the heating cylinder 56 . It becomes easy to smoothly take out from the outlet 56c of the heating cylinder 56. - ⁇ From the above, it is preferable to arrange the screw shaft 66a vertically.
- the injection cylinder 54 has a laterally long overall length considering the long projecting plunger 62 (and rod 63).
- the long injection cylinder 54 By arranging the long injection cylinder 54 with its axis horizontal, the height dimension of the injection device 50 can be reduced.
- the screw 66 by keeping L/D at 3 or less and reducing the length L, it is possible to reduce the height dimension of the injection device 50 even though the screw 66 is arranged so that the shaft is vertical. can.
- the heating cylinder 56 is provided with a cam groove 85 and the screw 66 is provided with a pin 86 .
- FIG. 7 shows an expanded view of the 7-7 line section of FIG.
- the cam groove 85 meanders vertically.
- the meandering height (amplitude) W is based on one pitch of the helical groove of the screw 66 shown in FIG. W may be set within the range of (0.2 to 1.0) ⁇ helical groove pitch.
- the pin 86 may be dropped into the cam groove 85 from the notch 87 and then the notch 87 may be covered with the lid 88 .
- the pin 86 moves "0° ⁇ 180° ⁇ 360°".
- the screw 66 moves up and down by W, that is, along the screw axis 66a.
- step number 01 the same applies hereinafter
- the outlet valve is opened. That is, in FIG. 5, outlet valve 82 is moved to open outlet 56c.
- the shut valve is closed. That is, in FIG. 5, the shut valve 75 is moved to close the nozzle 57 .
- back pressure control of the injection cylinder is performed. That is, in FIG. 1, the back pressure control of the injection cylinder 54 is started by the pump motor unit 32 so that a predetermined reaction force (resistance force) is applied to the plunger.
- the resin material flows through the outlet 56c, the outlet passage 81, the second horizontal tube 77, and the vertical tube 76 in order, and fills them. Due to this filling, the plunger 62 is gradually retracted (moved to the right in the figure).
- FIG. 9(a) shows a vertical injection molding apparatus 10 according to the present invention.
- the height H2 of the vertical injection molding apparatus 10 is approximately half the height H1 of the conventional vertical injection molding apparatus 100 . If the height is 1/2, the vertical injection molding apparatus 10 according to the present invention can be easily installed in a building with a low ceiling height or an existing building.
- a conventional mold clamping device 110 shown in FIG. 9(a) is of a toggle link type.
- the mold clamping device 20 shown in FIG. 9(b) is of the half-nut type.
- the height dimension can be made smaller with the half-nut method than with the toggle link method. This difference in method contributes to reducing the height of the vertical injection molding apparatus 10 .
- the half nut positioning mechanism 24, mold opening/closing mechanism 27, and half nut opening/closing mechanism 37 are preferably hydraulic cylinders, but may be electric cylinders that combine a ball screw and an electric motor.
- the injection positioning mechanism 52, the shut valve drive mechanism 79, and the outlet valve drive mechanism 83 are preferably hydraulic cylinders, but may be electric cylinders that combine a ball screw and an electric motor.
- the half nut positioning mechanism 24, the mold opening/closing mechanism 27, the half nut opening/closing mechanism 37, the injection positioning mechanism 52, the shut valve driving mechanism 79, and the outlet valve driving mechanism 83 are hydraulic cylinders, as shown in FIG. are controlled by the pump motor unit 32 .
- the present invention is suitable for vertical injection molding equipment.
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Abstract
Provided is a vertical injection molding apparatus (10) configured by: a mold clamping device (20), which has a vertical mold clamping shaft (20a) and which clamps a mold (12); and an injection device (50), which is disposed atop the mold clamping device (20) and which injects resin material into the mold (12). The injection device (50) comprises: a heating cylinder (56) that incorporates a rotatable screw and that heats the resin material to a predetermined temperature while agitating same; a material storage member (58) that is connected to the heating cylinder (56) and that stores the resin material; a nozzle (57) that is provided to the material storage member (58) and that extends to the mold (12); and an injection cylinder (54) that is provided to the material storage member (58) and that injects the resin material from the nozzle (57). A screw shaft (66a) of the screw extends vertically, and a cylinder shaft (54a) of the injection cylinder (54) extends horizontally.
Description
本発明は、竪型射出成形装置において、高さを低くすることができる技術に関する。
The present invention relates to a technology that can reduce the height of a vertical injection molding apparatus.
射出成形装置は、金型を開閉しつつ型締めする型締装置と、型締めされた金型へ樹脂材料を射出する射出装置とを、主要素とする。
型締め軸が水平であるものは横型射出成形装置と呼ばれ、型締め軸が鉛直であるものは竪型射出成形装置と呼ばれる。 The injection molding apparatus is mainly composed of a mold clamping device that clamps the mold while opening and closing the mold, and an injection device that injects a resin material into the clamped mold.
An apparatus with a horizontal mold clamping axis is called a horizontal injection molding apparatus, and an apparatus with a vertical mold clamping axis is called a vertical injection molding apparatus.
型締め軸が水平であるものは横型射出成形装置と呼ばれ、型締め軸が鉛直であるものは竪型射出成形装置と呼ばれる。 The injection molding apparatus is mainly composed of a mold clamping device that clamps the mold while opening and closing the mold, and an injection device that injects a resin material into the clamped mold.
An apparatus with a horizontal mold clamping axis is called a horizontal injection molding apparatus, and an apparatus with a vertical mold clamping axis is called a vertical injection molding apparatus.
竪型射出成形装置は、各種のものが知られている(例えば、特許文献1(図9)参照。)。
Various types of vertical injection molding apparatuses are known (see, for example, Patent Document 1 (Fig. 9)).
特許文献1を図10に基づいて説明する。
図10は従来の竪型射出成形装置の全体構成を示す図である。
竪型射出成形装置100は、型締め軸101が鉛直であって、金型102を開閉しつつ型締めする型締装置110と、型締めされた金型102へ樹脂材料を射出する射出装置120とを、主要素とする。Patent Document 1 will be described based on FIG.
FIG. 10 is a diagram showing the overall configuration of a conventional vertical injection molding apparatus.
The verticalinjection molding apparatus 100 includes a mold clamping shaft 101 that is vertical, a mold clamping device 110 that clamps the mold 102 while opening and closing it, and an injection device 120 that injects a resin material into the clamped mold 102. and are the main elements.
図10は従来の竪型射出成形装置の全体構成を示す図である。
竪型射出成形装置100は、型締め軸101が鉛直であって、金型102を開閉しつつ型締めする型締装置110と、型締めされた金型102へ樹脂材料を射出する射出装置120とを、主要素とする。
FIG. 10 is a diagram showing the overall configuration of a conventional vertical injection molding apparatus.
The vertical
型締装置110は、機台111に載っている固定盤112と、この固定盤112の上に上下動可能に配置される可動盤113と、この可動盤113から下へ延びて固定盤112を貫通するタイバー114と、このタイバー114を昇降するトグル機構115とからなる。
The mold clamping device 110 includes a fixed platen 112 mounted on a machine base 111, a movable platen 113 arranged on the fixed platen 112 so as to be vertically movable, and a fixed platen 112 extending downward from the movable platen 113. It consists of a tie bar 114 that passes through and a toggle mechanism 115 that raises and lowers the tie bar 114 .
トグル機構115で、タイバー114及び可動盤113が引き下げられると、金型102は型締めされる。トグル機構115で、タイバー114及び可動盤113が押し上げられると、金型102は開かれる。
When the tie bar 114 and the movable platen 113 are pulled down by the toggle mechanism 115, the mold 102 is clamped. When the tie bar 114 and the movable platen 113 are pushed up by the toggle mechanism 115, the mold 102 is opened.
射出装置120は、可動盤113の上に配置される加熱筒121と、この加熱筒121を上下に移動する射出機移動シリンダ122と、加熱筒121に内蔵されるスクリュー123と、このスクリュー123を回すスクリュー回転モータ124と、スクリュー123を鉛直軸(型締め軸101)に沿って移動する射出モータ125を、主要素とする。
The injection device 120 includes a heating cylinder 121 arranged on a movable platen 113, an injection machine moving cylinder 122 for moving the heating cylinder 121 up and down, a screw 123 incorporated in the heating cylinder 121, and the screw 123. A screw rotation motor 124 for turning and an injection motor 125 for moving the screw 123 along the vertical axis (mold clamping axis 101) are the main elements.
加熱筒121へ投入された樹脂材料は、スクリュー回転モータ124でスクリュー123を回すことで可塑化・計量される。
射出機移動シリンダ122で加熱筒121が下げられ、先端(下端)のノズル126が、金型102に当てられる。
射出モータ125で、スクリュー123が鉛直軸に沿って下げられ、樹脂材料が金型102へ射出される。 The resin material put into theheating cylinder 121 is plasticized and weighed by rotating the screw 123 with the screw rotation motor 124 .
Theheating cylinder 121 is lowered by the injection machine moving cylinder 122 , and the tip (lower end) nozzle 126 is brought into contact with the mold 102 .
Theinjection motor 125 lowers the screw 123 along the vertical axis to inject the resin material into the mold 102 .
射出機移動シリンダ122で加熱筒121が下げられ、先端(下端)のノズル126が、金型102に当てられる。
射出モータ125で、スクリュー123が鉛直軸に沿って下げられ、樹脂材料が金型102へ射出される。 The resin material put into the
The
The
このような構造の竪型射出成形装置100は、床面積が小さいため、複数機を並べて設置することができなどの理由から、広く採用されている。
ただし、竪型射出成形装置100の高さ(全高)H1は、かなり大きい。既存の建屋に設置できないときは、建屋を新規に建てる、または大幅に改修する必要がある。 The verticalinjection molding apparatus 100 having such a structure is widely used because of the fact that a plurality of apparatuses can be installed side by side because of the small floor space.
However, the height (total height) H1 of the verticalinjection molding apparatus 100 is considerably large. If it cannot be installed in the existing building, it is necessary to build a new building or renovate it significantly.
ただし、竪型射出成形装置100の高さ(全高)H1は、かなり大きい。既存の建屋に設置できないときは、建屋を新規に建てる、または大幅に改修する必要がある。 The vertical
However, the height (total height) H1 of the vertical
比較的低い既存の建屋に設置することを考えると、竪型射出成形装置であっても高さを低くすることが望まれる。
Considering that it will be installed in a relatively low existing building, it is desirable to reduce the height of even a vertical injection molding machine.
本発明は、高さが大幅に低い竪型射出成形装置を提供することを課題とする。
An object of the present invention is to provide a vertical injection molding apparatus whose height is significantly reduced.
請求項1に係る発明は、型締め軸が鉛直であり金型を型締めする型締装置と、この型締装置の上に配置され樹脂材料を前記金型へ射出する射出装置とで構成される竪型射出成形装置であって、
前記射出装置は、回転自在のスクリューを内蔵し前記樹脂材料を撹拌しつつ所定の温度に加熱する加熱筒と、この加熱筒に繋がり前記樹脂材料を貯留する材料貯留部材と、この材料貯留部材に設けられ前記金型へ延びるノズルと、前記材料貯留部材に設けられ前記樹脂材料を前記ノズルから射出する射出シリンダとを備え、
前記スクリューのスクリュー軸は、鉛直に延び、
前記射出シリンダのシリンダ軸は、水平に延びている。 The invention according toclaim 1 is composed of a mold clamping device having a vertical mold clamping axis for clamping a mold, and an injection device disposed on the mold clamping device for injecting a resin material into the mold. A vertical injection molding device comprising:
The injection device includes a heating cylinder that incorporates a rotatable screw and heats the resin material to a predetermined temperature while agitating it; a material storage member that is connected to the heating cylinder and stores the resin material; a nozzle provided and extending to the mold; and an injection cylinder provided in the material storage member for injecting the resin material from the nozzle,
A screw shaft of the screw extends vertically,
A cylinder axis of the injection cylinder extends horizontally.
前記射出装置は、回転自在のスクリューを内蔵し前記樹脂材料を撹拌しつつ所定の温度に加熱する加熱筒と、この加熱筒に繋がり前記樹脂材料を貯留する材料貯留部材と、この材料貯留部材に設けられ前記金型へ延びるノズルと、前記材料貯留部材に設けられ前記樹脂材料を前記ノズルから射出する射出シリンダとを備え、
前記スクリューのスクリュー軸は、鉛直に延び、
前記射出シリンダのシリンダ軸は、水平に延びている。 The invention according to
The injection device includes a heating cylinder that incorporates a rotatable screw and heats the resin material to a predetermined temperature while agitating it; a material storage member that is connected to the heating cylinder and stores the resin material; a nozzle provided and extending to the mold; and an injection cylinder provided in the material storage member for injecting the resin material from the nozzle,
A screw shaft of the screw extends vertically,
A cylinder axis of the injection cylinder extends horizontally.
好ましくは、請求項2に係る発明は、請求項1記載の竪型射出成形装置であって、
前記スクリューの有効長さをL、前記スクリューの外径をDとしたときに、L/Dは、3を超えない。 Preferably, the invention according toclaim 2 is the vertical injection molding apparatus according to claim 1,
L/D does not exceed 3, where L is the effective length of the screw and D is the outer diameter of the screw.
前記スクリューの有効長さをL、前記スクリューの外径をDとしたときに、L/Dは、3を超えない。 Preferably, the invention according to
L/D does not exceed 3, where L is the effective length of the screw and D is the outer diameter of the screw.
好ましくは、請求項3に係る発明は、請求項2記載の竪型射出成形装置であって、
前記L/Dは、1.0である。 Preferably, the invention according to claim 3 is the vertical injection molding apparatus according toclaim 2,
The L/D is 1.0.
前記L/Dは、1.0である。 Preferably, the invention according to claim 3 is the vertical injection molding apparatus according to
The L/D is 1.0.
好ましくは、請求項4に係る発明は、請求項1記載の竪型射出成形装置であって、
前記加熱筒は、底に樹脂材料を流出させる出口及びこの出口を開閉する出口弁を備え、この出口弁を出口弁駆動機構で移動するようにした。 Preferably, the invention according to claim 4 is the vertical injection molding apparatus according toclaim 1,
The heating cylinder has an outlet through which the resin material flows out and an outlet valve for opening and closing the outlet, and the outlet valve is moved by an outlet valve driving mechanism.
前記加熱筒は、底に樹脂材料を流出させる出口及びこの出口を開閉する出口弁を備え、この出口弁を出口弁駆動機構で移動するようにした。 Preferably, the invention according to claim 4 is the vertical injection molding apparatus according to
The heating cylinder has an outlet through which the resin material flows out and an outlet valve for opening and closing the outlet, and the outlet valve is moved by an outlet valve driving mechanism.
好ましくは、請求項5に係る発明は、請求項1~4のいずれか1項記載の竪型射出成形装置であって、
前記射出装置は、前記型締装置の上に配置される射出盤と、この射出盤の上方に配置され前記加熱筒及び前記射出シリンダを懸架するスクリュー駆動盤と、前記射出盤及び前記スクリュー駆動盤を上下方向に移動する射出位置決め機構とを、さらに備え、
前記射出位置決め機構は、シリンダと、このシリンダに対して軸方向へ移動するピストンロッドとを備え、
前記シリンダは、前記射出盤に前記スクリュー駆動盤を連結する連結部材を兼ねている。 Preferably, the invention according to claim 5 is the vertical injection molding apparatus according to any one ofclaims 1 to 4,
The injection device includes an injection platen arranged above the mold clamping device, a screw drive platen arranged above the injection platen for suspending the heating cylinder and the injection cylinder, and the injection platen and the screw drive platen. and an injection positioning mechanism that moves vertically,
The injection positioning mechanism comprises a cylinder and a piston rod that moves axially with respect to the cylinder,
The cylinder also serves as a connecting member that connects the screw drive platen to the injection platen.
前記射出装置は、前記型締装置の上に配置される射出盤と、この射出盤の上方に配置され前記加熱筒及び前記射出シリンダを懸架するスクリュー駆動盤と、前記射出盤及び前記スクリュー駆動盤を上下方向に移動する射出位置決め機構とを、さらに備え、
前記射出位置決め機構は、シリンダと、このシリンダに対して軸方向へ移動するピストンロッドとを備え、
前記シリンダは、前記射出盤に前記スクリュー駆動盤を連結する連結部材を兼ねている。 Preferably, the invention according to claim 5 is the vertical injection molding apparatus according to any one of
The injection device includes an injection platen arranged above the mold clamping device, a screw drive platen arranged above the injection platen for suspending the heating cylinder and the injection cylinder, and the injection platen and the screw drive platen. and an injection positioning mechanism that moves vertically,
The injection positioning mechanism comprises a cylinder and a piston rod that moves axially with respect to the cylinder,
The cylinder also serves as a connecting member that connects the screw drive platen to the injection platen.
好ましくは、請求項6に係る発明は、請求項1記載の竪型射出成形装置であって、
前記射出シリンダは、プランジャを備え、
前記材料貯留部材は、水平に延びつつ前記プランジャを収納する第1横筒と、この第1横筒の先端から下へ延びる縦筒と、この縦筒の高さ方向途中から前記加熱筒へ延びる第2横筒とを備えている。 Preferably, the invention according to claim 6 is the vertical injection molding apparatus according toclaim 1,
the injection cylinder comprises a plunger,
The material storage member includes a first horizontal cylinder that accommodates the plunger while extending horizontally, a vertical cylinder that extends downward from the tip of the first horizontal cylinder, and a vertical cylinder that extends from the middle in the height direction to the heating cylinder. and a second horizontal tube.
前記射出シリンダは、プランジャを備え、
前記材料貯留部材は、水平に延びつつ前記プランジャを収納する第1横筒と、この第1横筒の先端から下へ延びる縦筒と、この縦筒の高さ方向途中から前記加熱筒へ延びる第2横筒とを備えている。 Preferably, the invention according to claim 6 is the vertical injection molding apparatus according to
the injection cylinder comprises a plunger,
The material storage member includes a first horizontal cylinder that accommodates the plunger while extending horizontally, a vertical cylinder that extends downward from the tip of the first horizontal cylinder, and a vertical cylinder that extends from the middle in the height direction to the heating cylinder. and a second horizontal tube.
請求項1に係る発明では、竪型射出成形装置の射出装置において、加熱筒及びスクリューは鉛直に延びるようにし、射出シリンダは水平に延びるように配置した。
加熱筒を縦置きすることで、樹脂材料の均一加熱を図りつつ液状の樹脂材料を加熱筒の底に溜めることができる。射出シリンダは全体が長い。この長い射出シリンダを横置きすることで、射出装置の高さ寸法を小さくすることができる。
結果、樹脂材料の品質を維持しつつ、射出装置の高さ寸法を小さくすることができる。
すなわち、本発明により、高さが低い竪型射出成形装置が提供される。 In the invention according toclaim 1, in the injection unit of the vertical injection molding apparatus, the heating cylinder and the screw are arranged to extend vertically, and the injection cylinder is arranged to extend horizontally.
By arranging the heating cylinder vertically, the liquid resin material can be accumulated at the bottom of the heating cylinder while uniformly heating the resin material. The entire injection cylinder is long. By placing this long injection cylinder horizontally, the height dimension of the injection device can be reduced.
As a result, the height dimension of the injection device can be reduced while maintaining the quality of the resin material.
That is, the present invention provides a vertical injection molding apparatus with a low height.
加熱筒を縦置きすることで、樹脂材料の均一加熱を図りつつ液状の樹脂材料を加熱筒の底に溜めることができる。射出シリンダは全体が長い。この長い射出シリンダを横置きすることで、射出装置の高さ寸法を小さくすることができる。
結果、樹脂材料の品質を維持しつつ、射出装置の高さ寸法を小さくすることができる。
すなわち、本発明により、高さが低い竪型射出成形装置が提供される。 In the invention according to
By arranging the heating cylinder vertically, the liquid resin material can be accumulated at the bottom of the heating cylinder while uniformly heating the resin material. The entire injection cylinder is long. By placing this long injection cylinder horizontally, the height dimension of the injection device can be reduced.
As a result, the height dimension of the injection device can be reduced while maintaining the quality of the resin material.
That is, the present invention provides a vertical injection molding apparatus with a low height.
請求項2に係る発明では、スクリューのL/Dは、3を超えないようにした。スクリューの有効長さLを3以下にすることで、射出装置の高さ寸法が大きくなることを防ぐ。
In the invention according to claim 2, the L/D of the screw does not exceed 3. By setting the effective length L of the screw to 3 or less, an increase in the height dimension of the injection device is prevented.
請求項3に係る発明では、L/Dは、1.0である。スクリューの有効長さLが1.0であれば、スクリューの長さは十分に短くなり、射出装置の高さ寸法をより小さくすることできる。
In the invention according to claim 3, L/D is 1.0. If the effective length L of the screw is 1.0, the length of the screw will be sufficiently short and the height dimension of the injection device can be made smaller.
請求項4に係る発明では、加熱筒は、底に樹脂材料を流出させる出口及びこの出口を開閉する出口弁を備え、この出口弁を出口弁駆動機構で強制的に移動するようにした。
仮に、加熱筒の出口に逆止弁を設けても、樹脂材料の逆流は防ぐことができる。しかし、樹脂材料のカスが逆止弁の要部に堆積すると、逆止弁がリークし、逆流防止作用が低下する。
この点、本発明では、出口弁駆動機構で出口弁を強制的に移動する。強制的に移動される出口弁で、樹脂材料のカスを押出す又は削る。結果、信頼性の高い逆流防止作用が長期間にわたって維持できる。 In the invention according to claim 4, the heating cylinder has an outlet through which the resin material flows out at the bottom and an outlet valve for opening and closing the outlet, and the outlet valve is forcibly moved by the outlet valve driving mechanism.
Even if a check valve is provided at the outlet of the heating cylinder, backflow of the resin material can be prevented. However, if the residue of the resin material accumulates on the essential parts of the check valve, the check valve leaks and the backflow prevention function is deteriorated.
In this regard, in the present invention, the outlet valve is forcibly moved by the outlet valve driving mechanism. A forcibly moved outlet valve extrudes or scrapes off resin material debris. As a result, highly reliable anti-backflow action can be maintained for a long period of time.
仮に、加熱筒の出口に逆止弁を設けても、樹脂材料の逆流は防ぐことができる。しかし、樹脂材料のカスが逆止弁の要部に堆積すると、逆止弁がリークし、逆流防止作用が低下する。
この点、本発明では、出口弁駆動機構で出口弁を強制的に移動する。強制的に移動される出口弁で、樹脂材料のカスを押出す又は削る。結果、信頼性の高い逆流防止作用が長期間にわたって維持できる。 In the invention according to claim 4, the heating cylinder has an outlet through which the resin material flows out at the bottom and an outlet valve for opening and closing the outlet, and the outlet valve is forcibly moved by the outlet valve driving mechanism.
Even if a check valve is provided at the outlet of the heating cylinder, backflow of the resin material can be prevented. However, if the residue of the resin material accumulates on the essential parts of the check valve, the check valve leaks and the backflow prevention function is deteriorated.
In this regard, in the present invention, the outlet valve is forcibly moved by the outlet valve driving mechanism. A forcibly moved outlet valve extrudes or scrapes off resin material debris. As a result, highly reliable anti-backflow action can be maintained for a long period of time.
請求項5に係る発明では、射出位置決め機構のシリンダで、射出盤にスクリュー駆動盤を連結する連結部材を兼ねさせた。連結部材を別途設ける場合に比較して、本発明により、部品点数の低減を図りつつ、射出装置の軽量化が図れる。
In the invention according to claim 5, the cylinder of the injection positioning mechanism also serves as a connecting member that connects the screw drive plate to the injection plate. Compared to the case where a connecting member is provided separately, the present invention can reduce the number of parts and reduce the weight of the injection device.
請求項6に係る発明では、材料貯留部材は、水平に延びつつプランジャを収納する第1横筒と、この第1横筒の先端から下へ延びる縦筒と、この縦筒の高さ方向途中から加熱筒へ延びる第2横筒とを備えている。
加熱筒の高さ方向途中に、射出シリンダを横置きすることができ、射出装置をコンパクトにすることができる。 In the invention according to claim 6, the material storage member includes a first horizontal cylinder that extends horizontally and stores the plunger, a vertical cylinder that extends downward from the tip of the first horizontal cylinder, and a middle cylinder in the height direction of the vertical cylinder. and a second horizontal tube extending from to the heating tube.
The injection cylinder can be placed horizontally in the middle of the heating cylinder in the height direction, and the injection device can be made compact.
加熱筒の高さ方向途中に、射出シリンダを横置きすることができ、射出装置をコンパクトにすることができる。 In the invention according to claim 6, the material storage member includes a first horizontal cylinder that extends horizontally and stores the plunger, a vertical cylinder that extends downward from the tip of the first horizontal cylinder, and a middle cylinder in the height direction of the vertical cylinder. and a second horizontal tube extending from to the heating tube.
The injection cylinder can be placed horizontally in the middle of the heating cylinder in the height direction, and the injection device can be made compact.
本発明の実施の形態を添付図に基づいて以下に説明する。
An embodiment of the present invention will be described below based on the accompanying drawings.
以下に説明するシリンダにおいて、「伸動」は、ピストンロッドを前進させてシリンダ全長が伸びることを意味し、「縮動」はピストンロッドを後退させてシリンダ全長が縮むことを意味する。
In the cylinders described below, "extension" means advancing the piston rod to extend the entire length of the cylinder, and "retraction" means retracting the piston rod to shorten the entire length of the cylinder.
図1に示されるように、竪型射出成形装置10は、型締め軸20aが鉛直であって、下型13と上型14とからなる金型12を型締めする型締装置20と、この型締装置20の上に配置される射出装置50とを、主要素とする装置である。
As shown in FIG. 1, a vertical injection molding apparatus 10 includes a mold clamping device 20 having a vertical mold clamping shaft 20a for clamping a mold 12 consisting of a lower mold 13 and an upper mold 14; The main element of this device is an injection device 50 arranged above the mold clamping device 20 .
型締装置20は、床(又は機台)16に固定されるベッド21と、このベッド21に固定される圧受盤22と、この圧受盤22に載せられるターンテーブル23と、圧受盤22より下に配置される牽引盤25と、牽引盤25の下に配置されるハーフナット26と、圧受盤22より上に配置される可動盤28と、この可動盤28から下げられ圧受盤22及び牽引盤25を貫通するタイバー31と、ハーフナット位置調整機構24や型開閉機構27等へ圧油を制御しつつ供給するポンプモータユニット32を備えている。
牽引盤25は、圧受盤22に設けたハーフナット位置調整機構24で昇降される。
可動盤28は、圧受盤22に設けた型開閉機構27で昇降される。 Themold clamping device 20 includes a bed 21 fixed to a floor (or a machine base) 16, a pressure receiving plate 22 fixed to the bed 21, a turntable 23 placed on the pressure receiving plate 22, and a platen below the pressure receiving plate 22. a half nut 26 arranged under the traction board 25; a movable board 28 arranged above the pressure receiving board 22; 25, and a pump/motor unit 32 that supplies pressurized oil to the half nut position adjusting mechanism 24, the mold opening/closing mechanism 27, etc. while controlling it.
Thetraction board 25 is moved up and down by a half nut position adjusting mechanism 24 provided on the pressure receiving board 22 .
Themovable platen 28 is moved up and down by a mold opening/closing mechanism 27 provided on the pressure receiving platen 22 .
牽引盤25は、圧受盤22に設けたハーフナット位置調整機構24で昇降される。
可動盤28は、圧受盤22に設けた型開閉機構27で昇降される。 The
The
The
ハーフナット位置調整機構24は、ハーフナット位置調整油圧シリンダ24Aが好適である。同様に、型開閉機構27は、型開閉油圧シリンダ27Aが好ましい。
The half nut position adjusting mechanism 24 is preferably a half nut position adjusting hydraulic cylinder 24A. Similarly, the mold opening/closing mechanism 27 is preferably a mold opening/closing hydraulic cylinder 27A.
なお、圧受盤22は、ボルト等を緩めることでベッド21から外すことができる。よって、本発明における「固定」は、完全固定の他、分離可能に結合されている形態を含む。
また、ハーフナット位置調整機構24や型開閉機構27を、ベッド21に設けることは差し支えない。 Thepressure receiving plate 22 can be removed from the bed 21 by loosening bolts or the like. Therefore, "fixation" in the present invention includes not only complete fixation but also separably bonded forms.
Also, the half nut position adjusting mechanism 24 and the mold opening/closing mechanism 27 may be provided on thebed 21 without any problem.
また、ハーフナット位置調整機構24や型開閉機構27を、ベッド21に設けることは差し支えない。 The
Also, the half nut position adjusting mechanism 24 and the mold opening/closing mechanism 27 may be provided on the
牽引盤25は、例えば、上に開口する型締シリンダ33を有する。この型締シリンダ33に圧受盤22から下へ延びるピストン部34を収納する。型締シリンダ33とピストン部34との間に圧油室35が形成される。圧油室35に圧油が供給されると、牽引盤25が下がる。
The traction board 25 has, for example, a mold clamping cylinder 33 that opens upward. A piston portion 34 extending downward from the pressure receiving platen 22 is accommodated in the mold clamping cylinder 33 . A pressure oil chamber 35 is formed between the mold clamping cylinder 33 and the piston portion 34 . When pressure oil is supplied to the pressure oil chamber 35, the traction board 25 is lowered.
タイバー31は、下端部に係合部36が設けられている。この係合部36は、例えば、鋸歯部である。以下、係合部36を鋸歯部36と読み替える。
ハーフナット26は係合部としての鋸歯部36に係合する(噛み合う)半割ナットである。ハーフナット26は、牽引盤25に設けたハーフナット開閉機構37で開閉される。ハーフナット開閉機構37はハーフナット開閉油圧シリンダ37Aが好ましい。 Thetie bar 31 is provided with an engaging portion 36 at its lower end. This engaging portion 36 is, for example, a sawtooth portion. Hereinafter, the engaging portion 36 is read as the sawtooth portion 36 .
Thehalf nut 26 is a half-split nut that engages (engages) with the sawtooth portion 36 as an engaging portion. The half nut 26 is opened and closed by a half nut opening/closing mechanism 37 provided on the traction board 25 . The half nut opening/closing mechanism 37 is preferably a half nut opening/closing hydraulic cylinder 37A.
ハーフナット26は係合部としての鋸歯部36に係合する(噛み合う)半割ナットである。ハーフナット26は、牽引盤25に設けたハーフナット開閉機構37で開閉される。ハーフナット開閉機構37はハーフナット開閉油圧シリンダ37Aが好ましい。 The
The
鋸歯部36は、歯が竹の節(ふし)のように、等ピッチで並んでいるものが好ましい。歯は、矩形断面、台形断面、三角断面の何れでもよい。ハーフナット26には対応する歯が設けられている。
It is preferable that the teeth of the saw-toothed portion 36 are arranged at an equal pitch like bamboo joints. The teeth may be rectangular, trapezoidal, or triangular in cross section. The half nut 26 is provided with corresponding teeth.
タイバー31及びハーフナット26は、丈夫で硬い鋼で造られる。鋼同士の接触を円滑にするため、鋸歯部36とハーフナット26との間にグリース潤滑を施す。鋸歯部36より高い位置にて、タイバー31の外周面に給脂する。グリースは流れ落ちて、鋸歯部36に達する。給脂は、自動、手動の何れでもよい。
The tie bar 31 and half nut 26 are made of tough and hard steel. Grease lubrication is provided between the serrations 36 and the half nut 26 to facilitate steel-to-steel contact. At a position higher than the sawtooth portion 36, the outer peripheral surface of the tie bar 31 is lubricated. The grease runs down and reaches the serrations 36 . Greasing may be automatic or manual.
好ましくは、ハーフナット26の作動を監視するハーフナット作動監視機構38を、ハーフナット26の近傍に設ける。しかし、型開閉機構27及びハーフナット位置調整機構24の位置制御が精密に行えることを条件に、ハーフナット作動監視機構38を省くことは差し支えない。
Preferably, a half nut operation monitoring mechanism 38 for monitoring the operation of the half nut 26 is provided near the half nut 26. However, on the condition that the mold opening/closing mechanism 27 and the half nut position adjusting mechanism 24 can be accurately controlled, the half nut operation monitoring mechanism 38 may be omitted.
ハーフナット作動監視機構38は、近接スイッチ、リミットスイッチなど任意のセンサが使用できる。そのうちで、近接スイッチは、相手金属が一定距離内に接近したときに「物体あり」、相手金属が一定距離を超えて離れているときに「物体なし」と判別する非接触型センサである。ハーフナット26は廃グリースで濡れているが、非接触型センサであれば、誤検出の心配がない。その上、安価である。よって、近接スイッチが推奨される。
Arbitrary sensors such as proximity switches and limit switches can be used for the half nut operation monitoring mechanism 38. Proximity switch is a non-contact sensor that determines "object is present" when the mating metal approaches within a certain distance, and "no object" when the mating metal is beyond a certain distance. The half nut 26 is wet with waste grease, but if it is a non-contact type sensor, there is no fear of erroneous detection. Moreover, it is inexpensive. Proximity switches are therefore recommended.
好ましくは、ハーフナット26の下に且つ床16上に、廃グリースを受けるトレイ41を配置する。トレイ41は皿状の容器である。定期的又は随時、トレイ41を引き出し、溜まった廃グリースを処理することにより、床16上の汚れを防止する。
A tray 41 for receiving waste grease is preferably placed below the half nuts 26 and on the floor 16 . The tray 41 is a dish-shaped container. Regularly or as needed, the tray 41 is pulled out and accumulated waste grease is treated to prevent the floor 16 from being soiled.
好ましくは、ベッド21をカバー42で囲う。このカバー42は安全カバーの役割を果たす。ベッド21をカバー42で囲うことにより、型締装置20の外観性が高まる。ただし、安全柵等で代替できるため、カバー42は必須ではない。
Preferably, the bed 21 is surrounded by a cover 42. This cover 42 serves as a safety cover. By surrounding the bed 21 with the cover 42, the appearance of the mold clamping device 20 is enhanced. However, the cover 42 is not essential because it can be replaced by a safety fence or the like.
図2は、図1の2-2矢視図である。
図2に示されるように、タイバー31は、三角形の頂点に各々配置されている。うち、1本のタイバー31が、ターンテーブル23の回転中心を構成する。
製品取り出し位置17にて、下型13から樹脂成形品を取り出す。空になった下型13はターンテーブル23を180°回転させることにより、型締め位置18に移される。
製品取り出し作業と型締め作業とが並行して行えるため、ターンテーブル23を採用することにより、生産性を高めることができる。 FIG. 2 is a view taken along arrow 2-2 in FIG.
As shown in FIG. 2, the tie bars 31 are arranged at the vertices of each triangle. Among them, onetie bar 31 constitutes the center of rotation of the turntable 23 .
At the product take-outposition 17 , the resin molded product is taken out from the lower mold 13 . The empty lower mold 13 is moved to the mold clamping position 18 by rotating the turntable 23 by 180°.
Since the work of removing the product and the work of clamping the mold can be performed in parallel, the use of theturntable 23 can improve productivity.
図2に示されるように、タイバー31は、三角形の頂点に各々配置されている。うち、1本のタイバー31が、ターンテーブル23の回転中心を構成する。
製品取り出し位置17にて、下型13から樹脂成形品を取り出す。空になった下型13はターンテーブル23を180°回転させることにより、型締め位置18に移される。
製品取り出し作業と型締め作業とが並行して行えるため、ターンテーブル23を採用することにより、生産性を高めることができる。 FIG. 2 is a view taken along arrow 2-2 in FIG.
As shown in FIG. 2, the tie bars 31 are arranged at the vertices of each triangle. Among them, one
At the product take-out
Since the work of removing the product and the work of clamping the mold can be performed in parallel, the use of the
ただし、ターンテーブル23は、型締め位置18と製品取り出し位置17とを往復する往復台に代えることができる。この場合は、タイバー31は、4本にすることが望ましい。
または、ターンテーブル23や往復台を省いてもよい。この場合も、タイバー31は、4本にすることが望ましい。 However, theturntable 23 can be replaced with a carriage that reciprocates between the mold clamping position 18 and the product unloading position 17 . In this case, it is desirable to use four tie bars 31 .
Alternatively, theturntable 23 and the carriage may be omitted. Also in this case, it is desirable to use four tie bars 31 .
または、ターンテーブル23や往復台を省いてもよい。この場合も、タイバー31は、4本にすることが望ましい。 However, the
Alternatively, the
よって、型締装置20において、タイバー31の本数は自由に決めることができると共にターンテーブル23を設けるか否かや往復台を設けるか否かは任意である。
Therefore, in the mold clamping device 20, the number of tie bars 31 can be freely determined, and whether or not the turntable 23 is provided and whether or not the carriage is provided is optional.
図1の型締装置20において、ハーフナット26を開いて、鋸歯部36から分離する。次に、型開閉機構27を伸動して、可動盤28を上昇させる。可動盤28が上昇することに伴って、下型13から上型14が分離すると共にタイバー31が上昇する。
In the mold clamping device 20 of FIG. 1, the half nut 26 is opened and separated from the serrated portion 36. Next, the mold opening/closing mechanism 27 is extended to raise the movable platen 28 . As the movable platen 28 rises, the upper die 14 separates from the lower die 13 and the tie bars 31 rise.
次に、射出装置50を説明する。
図3に示されるように、射出装置50は、可動盤28の上方に可動盤28から所定の距離を保って配置される射出盤51と、ピストンロッド52aが下へ延びるようにして射出盤51に固定される射出位置決め機構52と、この射出位置決め機構52のシリンダ52bで連結されるようにして射出盤51の上方に射出盤51から一定の距離を保って配置されるスクリュー駆動盤53と、このスクリュー駆動盤53に取付けられる射出シリンダ54、スクリュー回転モータ55及び加熱筒56と、射出シリンダ54及び加熱筒56に架け渡され下端にノズル57を備えている材料貯留部材58とを、主要素とする。 Next, theinjection device 50 will be described.
As shown in FIG. 3, theinjection device 50 includes an injection platen 51 arranged above the movable platen 28 at a predetermined distance from the movable platen 28, and an injection platen 51 with a piston rod 52a extending downward. a screw drive platen 53 arranged above the injection platen 51 at a constant distance from the injection platen 51 so as to be connected by a cylinder 52b of the injection positioning mechanism 52; An injection cylinder 54, a screw rotating motor 55 and a heating cylinder 56 attached to the screw drive plate 53, and a material storage member 58 spanning the injection cylinder 54 and the heating cylinder 56 and having a nozzle 57 at its lower end are main elements. and
図3に示されるように、射出装置50は、可動盤28の上方に可動盤28から所定の距離を保って配置される射出盤51と、ピストンロッド52aが下へ延びるようにして射出盤51に固定される射出位置決め機構52と、この射出位置決め機構52のシリンダ52bで連結されるようにして射出盤51の上方に射出盤51から一定の距離を保って配置されるスクリュー駆動盤53と、このスクリュー駆動盤53に取付けられる射出シリンダ54、スクリュー回転モータ55及び加熱筒56と、射出シリンダ54及び加熱筒56に架け渡され下端にノズル57を備えている材料貯留部材58とを、主要素とする。 Next, the
As shown in FIG. 3, the
射出シリンダ54は、ボルト等によりスクリュー駆動盤53に固定されている。なお、射出シリンダ54と下の射出盤51との間に脚(またはスペーサや座)を噛ませて、射出シリンダ54を下位の射出盤51にも固定することは差し支えない。
射出シリンダ54は剛性に富む強度部材であるため、射出盤51とスクリュー駆動盤53との連結部材となる。 Theinjection cylinder 54 is fixed to the screw driving platen 53 with bolts or the like. It should be noted that there is no problem in fixing the injection cylinder 54 to the lower injection plate 51 by inserting a leg (or a spacer or a seat) between the injection cylinder 54 and the lower injection plate 51 .
Since theinjection cylinder 54 is a strength member with high rigidity, it serves as a connecting member between the injection platen 51 and the screw driving platen 53 .
射出シリンダ54は剛性に富む強度部材であるため、射出盤51とスクリュー駆動盤53との連結部材となる。 The
Since the
射出シリンダ54は、ピストン61を内蔵し、ピストン61の一面からプランジャ62が材料貯留部材58内まで延びている。また、ピストン61の他面からロッド63がシリンダ外まで延びている。このロッド63は計量センサ64で位置が監視される。すなわち、プランジャ62が後退して、樹脂材料の「計量」が完了したことを、ロッド63及び計量センサ64で検知する。
The injection cylinder 54 incorporates a piston 61 , and a plunger 62 extends from one surface of the piston 61 into the material storage member 58 . A rod 63 extends from the other surface of the piston 61 to the outside of the cylinder. The position of this rod 63 is monitored by a weighing sensor 64 . That is, the rod 63 and the weighing sensor 64 detect that the plunger 62 has retreated and the "weighing" of the resin material has been completed.
射出シリンダ54は、油圧シリンダが好適であり、シリンダ軸54aが水平になるように配置される。射出シリンダ54は、ピストンロッド(プランジャ62)を含めると全体が長くなる。この長い射出シリンダ54を横置きすることで、射出盤51からスクリュー駆動盤53までの高さ寸法を小さくすることができる。
The injection cylinder 54 is preferably a hydraulic cylinder, and is arranged so that the cylinder shaft 54a is horizontal. The injection cylinder 54 becomes longer when the piston rod (plunger 62) is included. By placing the long injection cylinder 54 horizontally, the height dimension from the injection platen 51 to the screw driving platen 53 can be reduced.
スクリュー回転モータ55はサーボモータが好適である。スクリュー回転モータ55のモータ軸に小径プーリ65が設けられ、スクリュー66に大径プーリ67が設けられ、プーリ間にベルト68が渡されている。大径プーリ67のプーリ経は、小径プーリ65のプーリ経の5~10倍とする。すると、減速比が1/5~1/10となり、低速でスクリュー66が回される。ベルト68はタイミングベルトが好適である。
A servomotor is suitable for the screw rotation motor 55 . A small-diameter pulley 65 is provided on the motor shaft of the screw rotating motor 55, a large-diameter pulley 67 is provided on the screw 66, and a belt 68 is passed between the pulleys. The pulley diameter of the large-diameter pulley 67 is five to ten times the pulley diameter of the small-diameter pulley 65 . Then, the speed reduction ratio becomes 1/5 to 1/10, and the screw 66 is rotated at low speed. Belt 68 is preferably a timing belt.
加熱筒56は、軸(スクリュー軸66a)が鉛直になるようにして、ボルト等によりスクリュー駆動盤53に固定されている。
また、スクリュー66は軸受71を介して、スクリュー駆動盤53に回転自在に取付けられている。なお、スクリュー66は、所定距離だけ軸方向(上下方向)へ移動が可能となるようにしてもよい。 Theheating cylinder 56 is fixed to the screw driving plate 53 with a bolt or the like such that the shaft (screw shaft 66a) is vertical.
Further, thescrew 66 is rotatably attached to the screw drive platen 53 via a bearing 71 . The screw 66 may be configured to be movable in the axial direction (vertical direction) by a predetermined distance.
また、スクリュー66は軸受71を介して、スクリュー駆動盤53に回転自在に取付けられている。なお、スクリュー66は、所定距離だけ軸方向(上下方向)へ移動が可能となるようにしてもよい。 The
Further, the
加熱筒56は、ホッパ72を備え、このホッパ72を用いて、加熱筒56内へ樹脂材料が投入される。なお、ホッパ72は、大径プーリ67及びベルト68と干渉しない部位に配置されている。
The heating cylinder 56 has a hopper 72 , and the resin material is put into the heating cylinder 56 using the hopper 72 . The hopper 72 is arranged at a location that does not interfere with the large-diameter pulley 67 and belt 68 .
図3では、ノズル57が金型(図1、符号12)にタッチしている。この状態から、射出位置決め機構52を伸動させる。すると、可動盤28に対して、射出盤51等が離れるように、上へ移動する。結果、図4に示されるように、ノズル57が金型から十分に離れる。射出位置決め機構52を縮動すると、図3に戻る。
なお、図4は、図3の符号を流用し、詳細な説明は省略する。 In FIG. 3, thenozzle 57 is touching the mold (FIG. 1, reference numeral 12). From this state, the ejection positioning mechanism 52 is extended. Then, the ejection platen 51 and the like move upward so as to separate from the movable platen 28 . As a result, the nozzle 57 is sufficiently separated from the mold, as shown in FIG. When the injection positioning mechanism 52 is retracted, it returns to FIG.
4 uses the reference numerals of FIG. 3, and detailed description thereof is omitted.
なお、図4は、図3の符号を流用し、詳細な説明は省略する。 In FIG. 3, the
4 uses the reference numerals of FIG. 3, and detailed description thereof is omitted.
また、射出位置決め機構52のシリンダ52bで、射出盤51にスクリュー駆動盤53を連結する連結部材を兼ねさせた。
仮に、射出盤51にスクリュー駆動盤53を連結する連結部材を、シリンダ52bとは別に設けるとすれば、この別途設ける連結部材の分だけ重量が増加して、射出装置50が重くなる。
対して、本実施例では、連結部材を別途設けないため、部品点数の低減を図りつつ、射出装置50の軽量化が図れる。 Further, thecylinder 52b of the injection positioning mechanism 52 also serves as a connecting member for connecting the screw driving platen 53 to the injection platen 51. As shown in FIG.
If a connecting member that connects thescrew driving platen 53 to the injection platen 51 is provided separately from the cylinder 52b, the weight of the separately provided connecting member increases, and the weight of the injection device 50 increases.
On the other hand, in the present embodiment, since a connecting member is not provided separately, the weight of theinjection device 50 can be reduced while reducing the number of parts.
仮に、射出盤51にスクリュー駆動盤53を連結する連結部材を、シリンダ52bとは別に設けるとすれば、この別途設ける連結部材の分だけ重量が増加して、射出装置50が重くなる。
対して、本実施例では、連結部材を別途設けないため、部品点数の低減を図りつつ、射出装置50の軽量化が図れる。 Further, the
If a connecting member that connects the
On the other hand, in the present embodiment, since a connecting member is not provided separately, the weight of the
材料貯留部材58と、スクリュー66との詳細を、図5に基づいて説明する。
図5に示されるように、材料貯留部材58は、水平に延びつつプランジャ62を収納する第1横筒74と、この第1横筒74の先端から下へ延びつつシャット弁75を収納する縦筒76と、この縦筒76の高さ方向途中から加熱筒56へ延びる第2横筒77とからなる。 Details of thematerial storage member 58 and the screw 66 will be described with reference to FIG.
As shown in FIG. 5, thematerial storage member 58 includes a first horizontal cylinder 74 that extends horizontally and houses the plunger 62 , and a vertical cylinder that extends downward from the tip of the first horizontal cylinder 74 and houses the shut valve 75 . It consists of a tube 76 and a second horizontal tube 77 extending from the middle of the vertical tube 76 in the height direction to the heating tube 56 .
図5に示されるように、材料貯留部材58は、水平に延びつつプランジャ62を収納する第1横筒74と、この第1横筒74の先端から下へ延びつつシャット弁75を収納する縦筒76と、この縦筒76の高さ方向途中から加熱筒56へ延びる第2横筒77とからなる。 Details of the
As shown in FIG. 5, the
加熱筒56の高さ方向途中の高さに、プランジャ62を横置きすることができる。すなわち、図4に示されるように、加熱筒56の高さ方向途中に、射出シリンダ54を横置きすることができ射出装置50の高さ寸法を小さくすることができる。
The plunger 62 can be placed horizontally at a height in the middle of the heating cylinder 56 in the height direction. That is, as shown in FIG. 4, the injection cylinder 54 can be placed horizontally in the middle of the heating cylinder 56 in the height direction, and the height dimension of the injection device 50 can be reduced.
図5に示されるように、加熱筒56の外周に、ヒータ78が巻かれており、このヒータ78で、加熱筒56が所定の温度に保たれる。
また、材料貯留部材58の外周に、加熱ヒータ84が巻かれており、この加熱ヒータ84で、材料貯留部材58が所定の温度に保たれる。 As shown in FIG. 5, aheater 78 is wound around the outer periphery of the heating cylinder 56, and the heater 78 keeps the heating cylinder 56 at a predetermined temperature.
Aheater 84 is wound around the outer periphery of the material storage member 58, and the heater 84 keeps the material storage member 58 at a predetermined temperature.
また、材料貯留部材58の外周に、加熱ヒータ84が巻かれており、この加熱ヒータ84で、材料貯留部材58が所定の温度に保たれる。 As shown in FIG. 5, a
A
縦筒76の上面にシャット弁駆動機構79が設けられており、このシャット弁駆動機構79でシャット弁75が弁閉位置から弁開位置へ移動される。
A shut valve drive mechanism 79 is provided on the upper surface of the vertical tube 76, and the shut valve drive mechanism 79 moves the shut valve 75 from the valve closed position to the valve open position.
圧受けブロック89をスクリュー駆動盤53から下げる。この圧受けブロック89で、材料貯留部材58(特に縦筒76)が、上方へ移動することを防ぐ。ノズル57が金型(図1、符号12)にタッチしたときの背圧(又は上向き力)を、圧受けブロック89で受けさせることができる。
The pressure receiving block 89 is lowered from the screw driving platen 53. The pressure receiving block 89 prevents the material storage member 58 (particularly the vertical tube 76) from moving upward. A pressure receiving block 89 can receive the back pressure (or upward force) when the nozzle 57 touches the mold ( FIG. 1 , reference numeral 12 ).
加熱筒56の底には、出口56c及び第2横筒77に繋がる出口通路81が設けられ、この出口通路81に、出口弁82が置かれる。この出口弁82は、出口弁駆動機構83で出口弁82が弁閉位置から弁開位置へ移動される。
An outlet passage 81 connected to the outlet 56c and the second horizontal cylinder 77 is provided at the bottom of the heating cylinder 56, and an outlet valve 82 is placed in the outlet passage 81. The outlet valve 82 is moved from the valve closed position to the valve open position by the outlet valve drive mechanism 83 .
仮に、加熱筒56の出口56cに汎用の逆止弁を設けても、樹脂材料の逆流は防ぐことができる。しかし、樹脂材料のカスが逆止弁の要部に堆積すると、逆止弁がリークし、逆流防止作用が低下する。
この点、本実施例では、出口弁駆動機構83で出口弁82を強制的に移動する。強制的に移動される出口弁82で、樹脂材料のカスを押出す又は削る。結果、信頼性の高い逆流防止作用が長期間にわたって維持できる。 Even if a general-purpose check valve is provided at theoutlet 56c of the heating cylinder 56, backflow of the resin material can be prevented. However, if the residue of the resin material accumulates on the essential parts of the check valve, the check valve leaks and the backflow prevention function is deteriorated.
In this regard, in this embodiment, theoutlet valve 82 is forcibly moved by the outlet valve driving mechanism 83 . The forcibly moved outlet valve 82 extrudes or scrapes off the residue of the resin material. As a result, highly reliable anti-backflow action can be maintained for a long period of time.
この点、本実施例では、出口弁駆動機構83で出口弁82を強制的に移動する。強制的に移動される出口弁82で、樹脂材料のカスを押出す又は削る。結果、信頼性の高い逆流防止作用が長期間にわたって維持できる。 Even if a general-purpose check valve is provided at the
In this regard, in this embodiment, the
スクリュー66は、超短尺スクリューであって、有効長さをL、外径をDとしたときに、L/Dは、実施例では、L/Dを約1.0とした。
すなわち、スクリュー66の外周に設けた螺旋溝の長さを確保しつつ、LとDとを決めた。
スクリュー66のL/Dが1.0であれば、スクリュー66の長さは十分に短く、射出装置50の高さ寸法をより小さくすることできる。 Thescrew 66 is an ultra-short screw, and when L is an effective length and D is an outer diameter, L/D is approximately 1.0 in the embodiment.
That is, L and D were determined while securing the length of the spiral groove provided on the outer periphery of thescrew 66 .
If the L/D of thescrew 66 is 1.0, the length of the screw 66 is sufficiently short and the height dimension of the injection device 50 can be made smaller.
すなわち、スクリュー66の外周に設けた螺旋溝の長さを確保しつつ、LとDとを決めた。
スクリュー66のL/Dが1.0であれば、スクリュー66の長さは十分に短く、射出装置50の高さ寸法をより小さくすることできる。 The
That is, L and D were determined while securing the length of the spiral groove provided on the outer periphery of the
If the L/D of the
従来、射出装置に使用されるスクリューは、L/Dが10~20であり、外径Dは小径である。小径で長いスクリューを、高速で回転させる。
対して、本発明に係るスクリュー66では、外径Dはかなり大きく、長さLはかなり短い。 Conventionally, screws used in injection devices have an L/D of 10 to 20 and an outer diameter D of small diameter. A long screw with a small diameter is rotated at high speed.
In contrast, thescrew 66 according to the present invention has a much larger outer diameter D and a much shorter length L.
対して、本発明に係るスクリュー66では、外径Dはかなり大きく、長さLはかなり短い。 Conventionally, screws used in injection devices have an L/D of 10 to 20 and an outer diameter D of small diameter. A long screw with a small diameter is rotated at high speed.
In contrast, the
樹脂材料は、スクリュー66が外周に形成した螺旋溝に沿って移動する。スクリュー66の周速は外径Dに正比例する。従来と本発明との周速を一致させる場合、本発明に係るスクリュー66は、十分に低速で回転させることができる。
The resin material moves along the spiral groove formed on the outer periphery by the screw 66. The peripheral speed of the screw 66 is directly proportional to the outer diameter D. When the peripheral speeds of the conventional and the present invention are matched, the screw 66 according to the present invention can be rotated at a sufficiently low speed.
なお、スクリュー66のL/Dは、1.0に限定するものではない。
本発明者らが検討したところでは、L/Dは、0.5~3.0の範囲であれば、採用できる。L/Dが0.5未満では、有効長さLが小さくなり、外周に十分な条数の螺旋溝が形成できなくなる。また、L/Dが3.0を超えると、図4に示される射出盤51とスクリュー駆動盤53との間隔を広くする必要があり、射出装置50の高さ寸法が許容高さから外れる。
よって、スクリュー66のL/Dは、0.5~3.0の範囲とし、好ましくは1.0とする。 Note that the L/D of thescrew 66 is not limited to 1.0.
According to studies by the present inventors, any L/D in the range of 0.5 to 3.0 can be adopted. If L/D is less than 0.5, the effective length L becomes too small to form a sufficient number of spiral grooves on the outer periphery. Further, when L/D exceeds 3.0, it is necessary to widen the distance between theinjection platen 51 and the screw drive platen 53 shown in FIG.
Therefore, the L/D of thescrew 66 should be in the range of 0.5 to 3.0, preferably 1.0.
本発明者らが検討したところでは、L/Dは、0.5~3.0の範囲であれば、採用できる。L/Dが0.5未満では、有効長さLが小さくなり、外周に十分な条数の螺旋溝が形成できなくなる。また、L/Dが3.0を超えると、図4に示される射出盤51とスクリュー駆動盤53との間隔を広くする必要があり、射出装置50の高さ寸法が許容高さから外れる。
よって、スクリュー66のL/Dは、0.5~3.0の範囲とし、好ましくは1.0とする。 Note that the L/D of the
According to studies by the present inventors, any L/D in the range of 0.5 to 3.0 can be adopted. If L/D is less than 0.5, the effective length L becomes too small to form a sufficient number of spiral grooves on the outer periphery. Further, when L/D exceeds 3.0, it is necessary to widen the distance between the
Therefore, the L/D of the
また好ましくは、スクリュー66の先端(下端)を円錐面とし、この円錐面に渦巻溝を設けてもよい。回転する渦巻溝で、加熱筒56の底に溜まった液状の樹脂材料に旋回力を付与することができる。旋回力により、液状の樹脂材料がさらに攪拌され、温度のさらなる均一化と材料のさらなる均質化とが図れる。
Also preferably, the tip (lower end) of the screw 66 may be formed into a conical surface, and a spiral groove may be provided in this conical surface. The rotating spiral groove can impart a swirling force to the liquid resin material accumulated at the bottom of the heating cylinder 56 . The swirling force further agitates the liquid resin material, thereby achieving further uniformity of temperature and further homogenization of the material.
スクリュー66を縦向きに配置する理由は、図6に基づいて説明される。
図6(a)に示されるように、スクリュー軸66aが水平になるように、スクリュー66及び加熱筒56を配置した(比較例)を検討する。
第1に、加熱筒56において、下部分56aに対して、上部分56bが高温になる。すなわち、上下方向で温度差が不可避的に発生する。結果、樹脂材料に温度むらが発生し、好ましくない。
第2に、樹脂材料は、固体であったものが、加熱されつつ混錬・圧縮されることで、軟化し、液状材料になる。この液状材料が、加熱筒56の下部56a付近に溜まる。加熱筒56の出口56cから、円滑に出すことが難しくなる。 The reason for arranging thescrew 66 vertically will be explained on the basis of FIG.
As shown in FIG. 6A, thescrew 66 and the heating cylinder 56 are arranged so that the screw shaft 66a is horizontal (comparative example).
First, in theheating barrel 56, the upper portion 56b becomes hotter than the lower portion 56a. That is, a temperature difference inevitably occurs in the vertical direction. As a result, temperature unevenness occurs in the resin material, which is not preferable.
Secondly, the resin material, which used to be a solid material, is softened by being kneaded and compressed while being heated, and becomes a liquid material. This liquid material accumulates near thelower portion 56 a of the heating cylinder 56 . It becomes difficult to smoothly exit from the outlet 56c of the heating cylinder 56.
図6(a)に示されるように、スクリュー軸66aが水平になるように、スクリュー66及び加熱筒56を配置した(比較例)を検討する。
第1に、加熱筒56において、下部分56aに対して、上部分56bが高温になる。すなわち、上下方向で温度差が不可避的に発生する。結果、樹脂材料に温度むらが発生し、好ましくない。
第2に、樹脂材料は、固体であったものが、加熱されつつ混錬・圧縮されることで、軟化し、液状材料になる。この液状材料が、加熱筒56の下部56a付近に溜まる。加熱筒56の出口56cから、円滑に出すことが難しくなる。 The reason for arranging the
As shown in FIG. 6A, the
First, in the
Secondly, the resin material, which used to be a solid material, is softened by being kneaded and compressed while being heated, and becomes a liquid material. This liquid material accumulates near the
図6(b)に示されるように、スクリュー軸66aが鉛直になるように、スクリュー66及び加熱筒56を配置した(実施例)を検討する。
第1に、樹脂材料は加熱筒56に投入された後、加熱、混錬・圧縮されつつ出口56cに向かって流下する。スクリュー軸66aに沿った上部分と下部分とでは温度差が発生するが、スクリュー軸66aに直交する面では、温度差は発生しない。よって、樹脂材料に温度むらが発生しない。
第2に、液状材料は、加熱筒56の底に溜まる。加熱筒56の出口56cから、円滑に出すことが容易になる。
以上により、スクリュー軸66aは、鉛直に配置することが好ましい。 As shown in FIG. 6(b), thescrew 66 and the heating cylinder 56 are arranged so that the screw shaft 66a is vertical (example).
First, after the resin material is put into theheating cylinder 56, it flows down toward the outlet 56c while being heated, kneaded and compressed. A temperature difference occurs between the upper portion and the lower portion along the screw shaft 66a, but no temperature difference occurs on the surface orthogonal to the screw shaft 66a. Therefore, temperature unevenness does not occur in the resin material.
Second, the liquid material collects at the bottom of theheating cylinder 56 . It becomes easy to smoothly take out from the outlet 56c of the heating cylinder 56. - 特許庁
From the above, it is preferable to arrange thescrew shaft 66a vertically.
第1に、樹脂材料は加熱筒56に投入された後、加熱、混錬・圧縮されつつ出口56cに向かって流下する。スクリュー軸66aに沿った上部分と下部分とでは温度差が発生するが、スクリュー軸66aに直交する面では、温度差は発生しない。よって、樹脂材料に温度むらが発生しない。
第2に、液状材料は、加熱筒56の底に溜まる。加熱筒56の出口56cから、円滑に出すことが容易になる。
以上により、スクリュー軸66aは、鉛直に配置することが好ましい。 As shown in FIG. 6(b), the
First, after the resin material is put into the
Second, the liquid material collects at the bottom of the
From the above, it is preferable to arrange the
図3において、スクリュー軸66aが鉛直になるように配置した理由は図6で述べた通りである。
また、図3において、射出シリンダ54は、長く突き出ているプランジャ62(及びロッド63)を考慮すると、全長は横に長い。長い射出シリンダ54を、軸が水平になるようにして配置することにより、射出装置50の高さ寸法を小さくすることができる。
スクリュー66においても、L/Dを3以下に留めて、長さLを小さくしたことにより、軸が鉛直になるように配置したにも拘わらず、射出装置50の高さ寸法を小さくすることができる。 The reason why thescrew shaft 66a is arranged vertically in FIG. 3 is as described in FIG.
Also, in FIG. 3, theinjection cylinder 54 has a laterally long overall length considering the long projecting plunger 62 (and rod 63). By arranging the long injection cylinder 54 with its axis horizontal, the height dimension of the injection device 50 can be reduced.
In thescrew 66 as well, by keeping L/D at 3 or less and reducing the length L, it is possible to reduce the height dimension of the injection device 50 even though the screw 66 is arranged so that the shaft is vertical. can.
また、図3において、射出シリンダ54は、長く突き出ているプランジャ62(及びロッド63)を考慮すると、全長は横に長い。長い射出シリンダ54を、軸が水平になるようにして配置することにより、射出装置50の高さ寸法を小さくすることができる。
スクリュー66においても、L/Dを3以下に留めて、長さLを小さくしたことにより、軸が鉛直になるように配置したにも拘わらず、射出装置50の高さ寸法を小さくすることができる。 The reason why the
Also, in FIG. 3, the
In the
好ましくは、図5に示されるように、加熱筒56にカム溝85を設け、スクリュー66にピン86を設ける。
図5の7-7線断面を展開した図が、図7に示される。
図7に示されるように、カム溝85は上下に蛇行させる。蛇行の高さ(振幅)Wは、図5に示されるスクリュー66の螺旋溝の1ピッチを基準とする。Wは、(0.2~1.0)×螺旋溝ピッチの範囲から設定してもよい。
また、ピン86を、切欠き87からカム溝85に落とし込み、次に、切欠き87をリッド88で塞ぐようにしてもよい。 Preferably, as shown in FIG. 5, theheating cylinder 56 is provided with a cam groove 85 and the screw 66 is provided with a pin 86 .
FIG. 7 shows an expanded view of the 7-7 line section of FIG.
As shown in FIG. 7, thecam groove 85 meanders vertically. The meandering height (amplitude) W is based on one pitch of the helical groove of the screw 66 shown in FIG. W may be set within the range of (0.2 to 1.0)×helical groove pitch.
Alternatively, thepin 86 may be dropped into the cam groove 85 from the notch 87 and then the notch 87 may be covered with the lid 88 .
図5の7-7線断面を展開した図が、図7に示される。
図7に示されるように、カム溝85は上下に蛇行させる。蛇行の高さ(振幅)Wは、図5に示されるスクリュー66の螺旋溝の1ピッチを基準とする。Wは、(0.2~1.0)×螺旋溝ピッチの範囲から設定してもよい。
また、ピン86を、切欠き87からカム溝85に落とし込み、次に、切欠き87をリッド88で塞ぐようにしてもよい。 Preferably, as shown in FIG. 5, the
FIG. 7 shows an expanded view of the 7-7 line section of FIG.
As shown in FIG. 7, the
Alternatively, the
スクリュー66は、一回転する間、ピン86が、「0°→180°→360°」と移動する。結果、スクリュー66はWだけ上下、すなわち、スクリュー軸66aに沿って移動する。
スクリュー66による螺旋運動に、この軸方向運動が加わることで、樹脂材料のより好ましい混錬が得られる。
したがって、カム溝85は、必須ではないが、設けることが望まれる。 During one rotation of thescrew 66, the pin 86 moves "0°→180°→360°". As a result, the screw 66 moves up and down by W, that is, along the screw axis 66a.
By adding this axial motion to the helical motion of thescrew 66, more favorable kneading of the resin material can be obtained.
Therefore, although thecam groove 85 is not essential, it is desirable to provide it.
スクリュー66による螺旋運動に、この軸方向運動が加わることで、樹脂材料のより好ましい混錬が得られる。
したがって、カム溝85は、必須ではないが、設けることが望まれる。 During one rotation of the
By adding this axial motion to the helical motion of the
Therefore, although the
以上の構成からなる射出装置50の作用は、図8に基づいて説明される。
図8のST01(ステップ番号01。以下同様)で、出口弁を開く。すなわち、図5で、出口弁82を移動して出口56cを開く。
ST02で、シャット弁を閉じる。すなわち、図5で、シャット弁75を移動してノズル57を閉じる。
ST03で、射出シリンダの背圧制御を実施する。すなわち、図1で、ポンプモータユニット32により、プランジャに所定の反力(抵抗力)が加わるように、射出シリンダ54の背圧制御を開始する。 The operation of theinjection device 50 configured as described above will be described with reference to FIG.
In ST01 of FIG. 8 (step number 01, the same applies hereinafter), the outlet valve is opened. That is, in FIG. 5,outlet valve 82 is moved to open outlet 56c.
At ST02, the shut valve is closed. That is, in FIG. 5, theshut valve 75 is moved to close the nozzle 57 .
In ST03, back pressure control of the injection cylinder is performed. That is, in FIG. 1, the back pressure control of theinjection cylinder 54 is started by the pump motor unit 32 so that a predetermined reaction force (resistance force) is applied to the plunger.
図8のST01(ステップ番号01。以下同様)で、出口弁を開く。すなわち、図5で、出口弁82を移動して出口56cを開く。
ST02で、シャット弁を閉じる。すなわち、図5で、シャット弁75を移動してノズル57を閉じる。
ST03で、射出シリンダの背圧制御を実施する。すなわち、図1で、ポンプモータユニット32により、プランジャに所定の反力(抵抗力)が加わるように、射出シリンダ54の背圧制御を開始する。 The operation of the
In ST01 of FIG. 8 (step number 01, the same applies hereinafter), the outlet valve is opened. That is, in FIG. 5,
At ST02, the shut valve is closed. That is, in FIG. 5, the
In ST03, back pressure control of the injection cylinder is performed. That is, in FIG. 1, the back pressure control of the
ST04で、スクリューを回転しつつ樹脂材料を可塑化する。図5において、樹脂材料は出口56c、出口通路81、第2横筒77、縦筒76の順に流れて、これらに充満する。この充満により、プランジャ62が徐々に後退(図右へ移動)する。プランジャ62の断面積×プランジャ62の移動距離=計量値の算式により、樹脂材料が計量される。計量値が所定値になったら、計量が完了し、背圧制御も終了する。
At ST04, plasticize the resin material while rotating the screw. In FIG. 5, the resin material flows through the outlet 56c, the outlet passage 81, the second horizontal tube 77, and the vertical tube 76 in order, and fills them. Due to this filling, the plunger 62 is gradually retracted (moved to the right in the figure). The resin material is weighed according to the following equation: cross-sectional area of plunger 62 x travel distance of plunger 62 = weighed value. When the weighed value reaches a predetermined value, the weighing is completed and the back pressure control is terminated.
ST05で、計量完了を調べ、計量が完了したら、出口弁を閉じる(ST06)。
ST07で、型締めが完了していることを確認し、確認ができたら、シャット弁を開く(ST08)。
シャット弁75が開けられ、プランジャ62は前進し、樹脂材料をノズル57から射出する(ST09)。
ST10で、射出が終了したことが確認できたら、シャット弁を閉じる(ST11)。 In ST05, the completion of weighing is checked, and when the weighing is completed, the outlet valve is closed (ST06).
In ST07, it is confirmed that the clamping of the molds is completed, and when the confirmation is completed, the shut valve is opened (ST08).
The shutvalve 75 is opened, the plunger 62 advances, and the resin material is injected from the nozzle 57 (ST09).
When it is confirmed in ST10 that the injection has ended, the shut valve is closed (ST11).
ST07で、型締めが完了していることを確認し、確認ができたら、シャット弁を開く(ST08)。
シャット弁75が開けられ、プランジャ62は前進し、樹脂材料をノズル57から射出する(ST09)。
ST10で、射出が終了したことが確認できたら、シャット弁を閉じる(ST11)。 In ST05, the completion of weighing is checked, and when the weighing is completed, the outlet valve is closed (ST06).
In ST07, it is confirmed that the clamping of the molds is completed, and when the confirmation is completed, the shut valve is opened (ST08).
The shut
When it is confirmed in ST10 that the injection has ended, the shut valve is closed (ST11).
本発明に係る竪型射出成形装置10の利点は、図9に基づいて説明される。
図9(a)に従来の竪型射出成形装置100が示される。図9(b)に本発明に係る竪型射出成形装置10が示される。
竪型射出成形装置10の高さH2は、従来の竪型射出成形装置100の高さH1のほぼ1/2である。
高さが1/2であれば、本発明に係る竪型射出成形装置10は、天井高さが低い建屋や既存の建屋に、容易に設置することができる。 Advantages of the verticalinjection molding apparatus 10 according to the invention are explained on the basis of FIG.
A conventional verticalinjection molding apparatus 100 is shown in FIG. 9(a). FIG. 9(b) shows a vertical injection molding apparatus 10 according to the present invention.
The height H2 of the verticalinjection molding apparatus 10 is approximately half the height H1 of the conventional vertical injection molding apparatus 100 .
If the height is 1/2, the verticalinjection molding apparatus 10 according to the present invention can be easily installed in a building with a low ceiling height or an existing building.
図9(a)に従来の竪型射出成形装置100が示される。図9(b)に本発明に係る竪型射出成形装置10が示される。
竪型射出成形装置10の高さH2は、従来の竪型射出成形装置100の高さH1のほぼ1/2である。
高さが1/2であれば、本発明に係る竪型射出成形装置10は、天井高さが低い建屋や既存の建屋に、容易に設置することができる。 Advantages of the vertical
A conventional vertical
The height H2 of the vertical
If the height is 1/2, the vertical
また、図9(a)に示される従来の型締装置110は、トグルリンク方式である。対して、図9(b)に示される型締装置20はハーフナット方式である。トグルリンク方式より、ハーフナット方式の方が、高さ寸法を小さくすることができる。
この方式の違いが、竪型射出成形装置10の高さを低くすることに、寄与している。 A conventionalmold clamping device 110 shown in FIG. 9(a) is of a toggle link type. On the other hand, the mold clamping device 20 shown in FIG. 9(b) is of the half-nut type. The height dimension can be made smaller with the half-nut method than with the toggle link method.
This difference in method contributes to reducing the height of the verticalinjection molding apparatus 10 .
この方式の違いが、竪型射出成形装置10の高さを低くすることに、寄与している。 A conventional
This difference in method contributes to reducing the height of the vertical
尚、ハーフナット位置決め機構24、型開閉機構27、ハーフナット開閉機構37は、油圧シリンダが好適であるが、ボールねじと電動モータとを組合わせてなる電動シリンダであってもよい。
同様に、射出位置決め機構52、シャット弁駆動機構79、出口弁駆動機構83は、油圧シリンダが好適であるが、ボールねじと電動モータとを組合わせてなる電動シリンダであってもよい。 The half nut positioning mechanism 24, mold opening/closing mechanism 27, and half nut opening/closing mechanism 37 are preferably hydraulic cylinders, but may be electric cylinders that combine a ball screw and an electric motor.
Similarly, theinjection positioning mechanism 52, the shut valve drive mechanism 79, and the outlet valve drive mechanism 83 are preferably hydraulic cylinders, but may be electric cylinders that combine a ball screw and an electric motor.
同様に、射出位置決め機構52、シャット弁駆動機構79、出口弁駆動機構83は、油圧シリンダが好適であるが、ボールねじと電動モータとを組合わせてなる電動シリンダであってもよい。 The half nut positioning mechanism 24, mold opening/closing mechanism 27, and half nut opening/closing mechanism 37 are preferably hydraulic cylinders, but may be electric cylinders that combine a ball screw and an electric motor.
Similarly, the
ハーフナット位置決め機構24、型開閉機構27、ハーフナット開閉機構37、射出位置決め機構52、シャット弁駆動機構79、出口弁駆動機構83が油圧シリンダである場合は、図1に示されるように、これらはポンプモータユニット32で制御される。
If the half nut positioning mechanism 24, the mold opening/closing mechanism 27, the half nut opening/closing mechanism 37, the injection positioning mechanism 52, the shut valve driving mechanism 79, and the outlet valve driving mechanism 83 are hydraulic cylinders, as shown in FIG. are controlled by the pump motor unit 32 .
本発明は、竪型射出成形装置に好適である。
The present invention is suitable for vertical injection molding equipment.
10…竪型射出成形装置、12…金型、20…型締装置、20a…型締め軸、50…射出装置、51…射出盤、52…射出位置決め機構、52a…ピストンロッド、52b…シリンダ、53…スクリュー駆動盤、54…射出シリンダ、54a…シリンダ軸、56…加熱筒、56c…出口、57…ノズル、58…材料貯留部材、62…プランジャ、66…スクリュー、66a…スクリュー軸、74…第1横筒、76…縦筒、77…第2横筒、82…出口弁、83…出口弁駆動機構、D…スクリューの外径、L…スクリューの有効長さ、H2…竪型射出成形装置の高さ。
DESCRIPTION OF SYMBOLS 10... Vertical injection molding apparatus, 12... Mold, 20... Mold clamping apparatus, 20a... Mold clamping shaft, 50... Injection apparatus, 51... Injection platen, 52... Injection positioning mechanism, 52a... Piston rod, 52b... Cylinder, 53... Screw drive platen, 54... Injection cylinder, 54a... Cylinder shaft, 56... Heating cylinder, 56c... Outlet, 57... Nozzle, 58... Material storage member, 62... Plunger, 66... Screw, 66a... Screw shaft, 74... First horizontal tube 76 Vertical tube 77 Second horizontal tube 82 Outlet valve 83 Outlet valve driving mechanism D Outer diameter of screw L Effective length of screw H2 Vertical injection molding device height.
Claims (6)
- 型締め軸が鉛直であり金型を型締めする型締装置と、この型締装置の上に配置され樹脂材料を前記金型へ射出する射出装置とで構成される竪型射出成形装置であって、
前記射出装置は、回転自在のスクリューを内蔵し前記樹脂材料を撹拌しつつ所定の温度に加熱する加熱筒と、この加熱筒に繋がり前記樹脂材料を貯留する材料貯留部材と、この材料貯留部材に設けられ前記金型へ延びるノズルと、前記材料貯留部材に設けられ前記樹脂材料を前記ノズルから射出する射出シリンダとを備え、
前記スクリューのスクリュー軸は、鉛直に延び、
前記射出シリンダのシリンダ軸は、水平に延びている竪型射出成形装置。 A vertical injection molding apparatus comprising a mold clamping device having a vertical mold clamping axis for clamping a mold, and an injection device disposed above the mold clamping device for injecting a resin material into the mold. hand,
The injection device includes a heating cylinder that incorporates a rotatable screw and heats the resin material to a predetermined temperature while agitating it; a material storage member that is connected to the heating cylinder and stores the resin material; a nozzle provided and extending to the mold; and an injection cylinder provided in the material storage member for injecting the resin material from the nozzle,
A screw shaft of the screw extends vertically,
A vertical injection molding apparatus in which the cylinder axis of the injection cylinder extends horizontally. - 請求項1記載の竪型射出成形装置であって、
前記スクリューの有効長さをL、前記スクリューの外径をDとしたときに、L/Dは、3を超えない竪型射出成形装置。 The vertical injection molding apparatus according to claim 1,
A vertical injection molding apparatus where L/D does not exceed 3, where L is the effective length of the screw and D is the outer diameter of the screw. - 請求項2記載の竪型射出成形装置であって、
前記L/Dは、1.0である竪型射出成形装置。 The vertical injection molding apparatus according to claim 2,
The vertical injection molding apparatus, wherein the L/D is 1.0. - 請求項1記載の竪型射出成形装置であって、
前記加熱筒は、底に樹脂材料を流出させる出口及びこの出口を開閉する出口弁を備え、この出口弁を出口弁駆動機構で移動するようにした竪型射出成形装置。 The vertical injection molding apparatus according to claim 1,
A vertical injection molding apparatus, wherein the heating cylinder has an outlet for discharging the resin material at the bottom and an outlet valve for opening and closing the outlet, and the outlet valve is moved by an outlet valve driving mechanism. - 請求項1~4のいずれか1項記載の竪型射出成形装置であって、
前記射出装置は、前記型締装置の上に配置される射出盤と、この射出盤の上方に配置され前記加熱筒及び前記射出シリンダを懸架するスクリュー駆動盤と、前記射出盤及び前記スクリュー駆動盤を上下方向に移動する射出位置決め機構とを、さらに備え、
前記射出位置決め機構は、シリンダと、このシリンダに対して軸方向へ移動するピストンロッドとを備え、
前記シリンダは、前記射出盤に前記スクリュー駆動盤を連結する連結部材を兼ねている竪型射出成形装置。 The vertical injection molding apparatus according to any one of claims 1 to 4,
The injection device includes an injection platen arranged above the mold clamping device, a screw drive platen arranged above the injection platen for suspending the heating cylinder and the injection cylinder, and the injection platen and the screw drive platen. and an injection positioning mechanism that moves vertically,
The injection positioning mechanism comprises a cylinder and a piston rod that moves axially with respect to the cylinder,
A vertical injection molding apparatus in which the cylinder also serves as a connecting member for connecting the screw driving platen to the injection platen. - 請求項1記載の竪型射出成形装置であって、
前記射出シリンダは、プランジャを備え、
前記材料貯留部材は、水平に延びつつ前記プランジャを収納する第1横筒と、この第1横筒の先端から下へ延びる縦筒と、この縦筒の高さ方向途中から前記加熱筒へ延びる第2横筒とを備えている竪型射出成形装置。 The vertical injection molding apparatus according to claim 1,
the injection cylinder comprises a plunger,
The material storage member includes a first horizontal cylinder that accommodates the plunger while extending horizontally, a vertical cylinder that extends downward from the tip of the first horizontal cylinder, and a vertical cylinder that extends from the middle in the height direction to the heating cylinder. A vertical injection molding apparatus comprising a second horizontal cylinder.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS415266Y1 (en) * | 1962-11-26 | 1966-03-23 | ||
JPS6194730A (en) * | 1984-10-17 | 1986-05-13 | Shigeru Tsutsumi | Tiny precision injection molding device |
JPH0735019U (en) * | 1993-12-10 | 1995-06-27 | 株式会社名機製作所 | Vent type injection molding machine for thermosetting resin |
JPH10235701A (en) * | 1997-02-27 | 1998-09-08 | Mitsubishi Heavy Ind Ltd | Injection device of injection molding machine |
JP2012006297A (en) * | 2010-06-25 | 2012-01-12 | Sumitomo Heavy Ind Ltd | Molding machine |
-
2021
- 2021-07-19 JP JP2021118399A patent/JP7233487B2/en active Active
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- 2022-02-16 WO PCT/JP2022/006083 patent/WO2023002655A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS415266Y1 (en) * | 1962-11-26 | 1966-03-23 | ||
JPS6194730A (en) * | 1984-10-17 | 1986-05-13 | Shigeru Tsutsumi | Tiny precision injection molding device |
JPH0735019U (en) * | 1993-12-10 | 1995-06-27 | 株式会社名機製作所 | Vent type injection molding machine for thermosetting resin |
JPH10235701A (en) * | 1997-02-27 | 1998-09-08 | Mitsubishi Heavy Ind Ltd | Injection device of injection molding machine |
JP2012006297A (en) * | 2010-06-25 | 2012-01-12 | Sumitomo Heavy Ind Ltd | Molding machine |
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