WO2009144777A1 - 型締装置 - Google Patents
型締装置 Download PDFInfo
- Publication number
- WO2009144777A1 WO2009144777A1 PCT/JP2008/059674 JP2008059674W WO2009144777A1 WO 2009144777 A1 WO2009144777 A1 WO 2009144777A1 JP 2008059674 W JP2008059674 W JP 2008059674W WO 2009144777 A1 WO2009144777 A1 WO 2009144777A1
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- WO
- WIPO (PCT)
- Prior art keywords
- mold
- platen
- mold clamping
- space
- nut
- Prior art date
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Classifications
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- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
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- 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
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
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- 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
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1797—Machine parts provided with a shroud or cover or shield, e.g. for preventing oil or dust scattering
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- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C2045/4036—Ejector constructions; Ejector operating mechanisms driven by a screw and nut mechanism
Definitions
- the present invention relates to a mold clamping device.
- resin is injected from an injection nozzle of an injection device, filled in a cavity space between a fixed mold and a movable mold, and solidified to obtain a molded product.
- a mold clamping device is disposed to move the movable mold relative to the fixed mold to perform mold closing, mold clamping, and mold opening (for example, Patent Document 1).
- the mold clamping device is provided with an ejector device.
- the ejector device is a device for removing the solidified molded product from the mold.
- an ejector device is configured such that a molded product is ejected by projecting a rod (ejector rod) from the rear of a movable mold. Such an ejector rod advances and retreats when the ball screw is rotated by driving the motor.
- FIG. 1 is a view showing an arrangement example of a conventional ejector device.
- a mold clamping device 500 in FIG. 1 is a type of mold clamping device that obtains a mold clamping force by a toggle mechanism.
- 501 is a movable mold
- 502 is a fixed mold
- 503 is a toggle mechanism
- 504 is an ejector device.
- the ejector device 504 is disposed outside in an exposed state.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a mold clamping device that can appropriately prevent scattering of a lubricant used in an ejector device.
- the present invention provides a first platen in which one of a pair of molds is fixed, and a second platen in which the other of the pair of molds is fixed and can be advanced and retracted in the mold opening / closing direction. And a rod fixed to the second platen and transmitting a clamping force to the second platen from the opposite side of the first platen, the rod having a hollow structure, and the hollow structure A ball screw mechanism for an ejector of a molded product is disposed in the hollow portion formed by the above.
- the present invention is characterized in that the ball screw mechanism for the ejector includes a screw shaft and a nut, and a threaded portion between the screw shaft and the nut is immersed in a lubricant.
- the hollow portion includes a first space in which the ball screw mechanism is disposed, and the first space is another space only by a hole for supplying or discharging the lubricant. It is connected with.
- the present invention is characterized in that the first space is blocked by a bearing that supports the screw shaft.
- the present invention is characterized in that a seal material is disposed on the bearing.
- the present invention is characterized in that the bearing blocks a space in which the screw shaft and a drive shaft for rotating the screw shaft are fastened from the first space.
- a transmission member for transmitting linear motion of the nut is fixed to the nut, and a guide hole for penetrating the transmission member is formed in the first space.
- a seal material is disposed between the transmission member and the guide hole.
- FIG. 2 is a side view showing a state of the mold apparatus and the mold clamping apparatus when the mold is closed in the embodiment of the present invention.
- FIG. 3 is a side view showing a state of the mold apparatus and the mold clamping apparatus when the mold is opened in the embodiment of the present invention.
- the stationary platen 11 is placed on the guide Gd and is fixed to the frame Fr and the guide Gd.
- a rear platen 13 is disposed at a predetermined distance from the fixed platen 11 and facing the fixed platen 11. Between the fixed platen 11 and the rear platen 13, four tie bars 14 (only two are shown in the figure) are installed as connecting members.
- the movable platen 12 is disposed so as to be movable back and forth in the mold opening / closing direction along the tie bar 14 while being opposed to the fixed platen 11 (movable in the left-right direction in the drawing). For this purpose, a guide hole (not shown) through which the tie bar 14 passes is formed in the movable platen 12.
- the mold opening / closing direction that is, the moving direction of the movable platen 12 is referred to as a horizontal direction
- the direction perpendicular to the moving direction of the movable platen 12 is referred to as a vertical direction.
- a first screw portion (not shown) is formed at the front end portion (right end portion in the figure) of the tie bar 14, and the tie bar 14 is fixed to the fixed platen by screwing and tightening the nut n1 to the first screw portion. 11 is fixed.
- a guide post 21 having an outer diameter smaller than that of the tie bar 14 is integrally formed at the rear end portion (left end portion in the drawing) of each tie bar 14. The guide post 21 extends from the rear end surface (left end surface in the drawing) of the rear platen 13 so as to protrude rearward.
- a second screw portion (not shown) is formed in the vicinity of the rear end surface of the rear platen 13 of each guide post 21, and the fixed platen 11 and the rear platen 13 are screwed into the second screw portion with a nut n 2. It is fixed by tightening.
- the guide post 21 is formed integrally with the tie bar 14, the guide post 21 may be formed separately from the tie bar 14.
- the fixed mold 15 is fixed to the fixed platen 11, and the movable mold 16 is fixed to the movable platen 12.
- a mold apparatus 19 is configured by the fixed mold 15 and the movable mold 16.
- the movable mold 16 is moved with respect to the fixed mold 15 to perform mold closing, mold clamping, and mold opening.
- the mold clamping is performed, a cavity space is formed between the fixed mold 15 and the movable mold 16, and resin as a molding material injected from the injection nozzle 18 of the injection device 17 is filled into the cavity space.
- An attracting plate 22 as a magnetic body disposed in parallel with the movable platen 12 is disposed behind the rear platen 13 so as to be movable back and forth along each guide post 21 and is guided by the guide post 21.
- guide holes 23 through which the guide posts 21 pass are formed at positions corresponding to the respective guide posts 21.
- the guide hole 23 includes a large-diameter portion 24 opened on the front end surface (right end surface in the drawing) and a small-diameter portion 25 connected thereto.
- the large diameter portion 24 accommodates the nut n2.
- the small-diameter portion 25 opens at the rear end surface of the suction plate 22 and has a sliding surface on which the guide post 21 slides.
- a linear motor 28 is disposed between the suction plate 22 connected to the movable platen 12 and the frame Fr as a mold opening / closing drive unit.
- the linear motor 28 is fixed on the frame Fr to the slide base Sb on which the lower end of the suction plate 22 is fixed, and the stator 29 arranged in parallel with the guide Gd and corresponding to the moving range of the suction plate 22.
- a movable element 31 which is opposed to the stator 29 and formed over a predetermined range.
- the slide base Sb is supported on the guide Gd on both sides thereof, and supports the movable element 31 so as to be movable along the stator 29.
- the slide base Sb covers the upper surface of the mover 31 and extends in the extending direction of the guide Gd.
- leg portions 13a forming spaces 81 through which the guide base Gb and the slide base Sb pass are provided on both sides at the lower end of the rear platen 13.
- the length Lm is the maximum by the linear motor 28. It is set according to the driving force.
- the length Lp is set so as to satisfy the relationship Lp> Lm + Lst.
- the mover 31 includes a core 34 protruding toward the stator 29 and having a plurality of magnetic pole teeth 33 formed at a predetermined pitch, and a coil 35 wound around each magnetic pole tooth 33.
- the magnetic pole teeth 33 are formed in parallel to each other in a direction perpendicular to the moving direction of the movable platen 12.
- the stator 29 includes a core and a permanent magnet (not shown) formed to extend on the core.
- the permanent magnet is formed by magnetizing the N and S magnetic poles alternately and at the same pitch as the magnetic pole teeth 33.
- the mover 31 is moved forward and backward.
- the slide base Sb, the suction plate 22 fixed to the slide base Sb, and the movable platen 12 connected to the suction plate 22 by the rod 39 are moved forward and backward to perform mold closing and mold opening.
- the permanent magnet is disposed on the stator 29 and the coil 35 is disposed on the mover 31, the coil may be disposed on the stator and the permanent magnet may be disposed on the mover. In this case, since the coil does not move when the linear motor 28 is driven, wiring for supplying power to the coil can be easily performed.
- An electromagnet unit 37 as a mold-clamping drive unit is disposed between the rear platen 13 and the suction plate 22 so that mold clamping can be performed following mold closing.
- a rod 39 that connects the movable platen 12 and the suction plate 22 extends through the rear platen 13 and the suction plate 22.
- the rod 39 advances and retracts the movable platen 12 in conjunction with the advance and retreat of the suction plate 22 when the mold is closed and opened, and transmits the mold clamping force generated by the electromagnet unit 37 to the movable platen 12 when the mold is clamped.
- the mold clamping device 10 is configured by the frame Fr, the fixed platen 11, the movable platen 12, the rear platen 13, the suction plate 22, the linear motor 28, the electromagnet unit 37, the rod 39, and the like.
- the electromagnet unit 37 has an electromagnet 49 disposed on the rear platen 13 side, and an attracting portion 51 disposed on the attracting plate 22 side.
- Two grooves 45 as a coil arrangement portion having a rectangular cross-sectional shape extending in the horizontal direction are formed in parallel to each other at a predetermined portion of the rear end surface of the rear platen 13, that is, slightly above and below the rod 39. Yes.
- a core 46 having a rectangular cross-sectional shape is formed between the grooves 45, and a yoke 47 is formed in a portion other than the core 46 of the rear platen.
- a coil 48 is wound around the core 46.
- a suction portion 51 is provided in a portion surrounding the rod 39 in the suction plate 22 and facing the electromagnet 49.
- the core 46 and the yoke 47 of the rear platen 13 and the suction plate 22 are made of electromagnetic laminated steel plates formed by laminating thin plates made of ferromagnetic materials.
- an electromagnet 49 is provided separately from the rear platen 13 and an adsorbing portion 51 is provided separately from the adsorption plate 22, but an electromagnet is formed as a part of the rear platen 13 and adsorbed as a part of the adsorption plate 22. A part can also be formed.
- the electromagnetic laminated steel plate is not necessarily used, and the core 46 and the yoke 47 may be formed using an iron core made of the same member. In this way, the distance between the gaps can be set with higher accuracy.
- the rod 39 is connected to the suction plate 22 at the rear end portion (left end portion in the figure), and is connected to the movable platen 12 at the front end portion.
- the rod 39 moves forward when the suction plate 22 moves forward when the mold is closed, whereby the movable platen 12 moves forward. Further, the rod 39 moves backward when the suction plate 22 moves backward (moves leftward in the figure) when the mold is opened, and thereby the movable platen 12 moves backward.
- a hole 41 for allowing the rod 39 to penetrate is provided in the central portion of the rear platen 13.
- a hole 42 for penetrating the rod 39 is formed in the central portion of the suction plate 22.
- a bearing member Br1 such as a bush that slidably supports the rod 39 is disposed facing the opening at the front end of the hole 41.
- a screw 43 is formed at the rear end of the rod 39, and a nut 44 as a mold thickness adjusting mechanism that is rotatably supported by the suction plate 22 is screwed into the screw 43.
- the suction plate 22 When the mold closing is completed, the suction plate 22 is close to the rear platen 13, and a gap (gap) ⁇ is formed between the rear platen 13 and the suction plate 22. If the gap ⁇ becomes too small or too large, the adsorbing portion 51 cannot be adsorbed sufficiently and the mold clamping force will be reduced.
- the optimum value (distance or dimension) of the gap ⁇ changes as the thickness of the mold apparatus 19 changes.
- a large-diameter gear (not shown) is formed on the outer peripheral surface of the nut 44, and a mold thickness adjusting motor (not shown) is disposed on the suction plate 22 as a drive unit for adjusting the mold thickness.
- a small-diameter gear attached to the output shaft of the adjustment motor is meshed with a gear formed on the outer peripheral surface of the nut 44.
- the mold thickness adjusting motor When the mold thickness adjusting motor is driven in accordance with the thickness of the mold apparatus 19 and the nut 44 as the mold thickness adjusting mechanism is rotated by a predetermined amount with respect to the screw 43, the position of the rod 39 with respect to the suction plate 22 is changed.
- the gap ⁇ By adjusting the position of the suction plate 22 with respect to the fixed platen 11 and the movable platen 12, the gap ⁇ can be set to an optimum value. That is, the mold thickness is adjusted by changing the relative positions of the movable platen 12 and the suction plate 22.
- This adjustment of the mold thickness is to roughly adjust the distance of the gap ⁇ accompanying the change in the mold thickness.
- fine adjustment in units of 0.1 mm can change the position of the suction plate 22 on the slide base Sb, This is done by changing the position of the rear platen 13 on the guide Gd.
- the suction plate 22 is attached to a mounting plate 27 that is vertically installed from the slide base Sb, and the thickness of the shim sandwiched between the suction plate 22 and the mounting plate 27 is adjusted.
- the mounting plate 27 has ribs 27a, and is configured to maintain the verticality without falling down on the mounting surface of the mounting plate 27 even when a reaction force of the mold clamping force acts on the mounting plate 27. Has been.
- a shim having the same size as the entire surface of the electromagnet or the suction plate it is preferable to sandwich a shim having the same size as the entire surface of the electromagnet or the suction plate, but a shim having such a uniform thickness is used. It ’s difficult. Therefore, for example, when the vicinity of the four corners of the substantially quadrilateral suction plate is tightened with bolts, small shims are sandwiched only in the vicinity of the four places to be tightened. In such a case, there is a possibility that a gap is formed in a portion where the shim is not sandwiched and the suction plate is deformed to deteriorate the flatness or the parallelism with respect to the base.
- a mold thickness adjusting device is configured by the mold thickness adjusting motor, the gear, the nut 44, the rod 39, and the like.
- a rotation transmitting portion that transmits the rotation of the mold thickness adjusting motor to the nut 44 is constituted by the gear.
- the nut 44 and the screw 43 constitute a movement direction conversion unit, and the rotation movement of the nut 44 is converted into a straight movement of the rod 39 in the movement direction conversion unit.
- the value of the current supplied to the coil 48 is determined so that the mold clamping force becomes the target set value, and the current is supplied to the coil 48 to perform the mold clamping. While mold clamping is performed, the resin melted in the injection device 17 is injected from the injection nozzle 18 and filled into the cavity space of the mold device 19.
- the linear motor 28 is arranged as the first drive unit.
- an electric motor instead of the linear motor 28, an electric motor, a hydraulic cylinder or the like is arranged. Can do.
- the rotational rotational motion generated by driving the motor is converted into a linear motion by a ball screw as a motion direction conversion unit, and the movable platen 12 is advanced and retracted.
- an ejector device is disposed in the central portion of the rear end surface of the movable platen 12, that is, inside the rod 39.
- the ejector device is a device for ejecting solidified resin (that is, a molded product) from the movable mold 16 when mold opening is performed after mold clamping. That is, the molded product is protruded from the movable mold 16 by the ejector device and falls downward.
- solidified resin that is, a molded product
- FIGS. 5 and 7 show a state at the time of ejection (when a molded product is ejected).
- the direction indicated by the arrow A is the front
- the direction indicated by the arrow B is the rear. The direction coincides with the front-rear direction in the mold clamping device 10.
- the ejector apparatus 100 mainly includes a motor 101, a housing 102, a flange 103, a coupling 104, a BS (ball screw) shaft 105 (ball screw), a BS nut 106, and a connecting rod. 107, a cross head 108, an ejector rod 109, a bearing (bearing) 110, a lock nut 111, a bearing pressing plate 112, and the like.
- the motor 101 is a drive device for the ejector device 100. That is, the ejector rod 109 moves back and forth by driving the motor 101.
- the coupling 104 is a member (shaft coupling) for fastening (connecting) the motor shaft 1011 of the motor 101 and the BS shaft 105. Accordingly, the rotational movement of the motor shaft 1011 is transmitted to the BS shaft 105 by the coupling 104.
- the BS shaft 105 is disposed coaxially with the motor shaft 1011, and a screw portion 1051 is formed in a predetermined range in front of the BS shaft 105.
- the BS nut 106 is screwed into the screw portion 1051. Accordingly, the BS nut 106 moves in the front-rear direction in accordance with the rotation of the BS shaft 105. That is, the BS shaft 105 and the BS nut 106 constitute a ball screw mechanism for converting the rotational motion of the motor shaft 1011 into a linear motion in the front-rear direction.
- the connecting rod 107 is a member for connecting the BS nut 106 and the cross head 108 and for preventing the BS nut 106 from rotating. That is, the rear end portions of the plurality of connecting rods 107 are fixed to the front end surface of the BS nut 106. The front end portion of each connecting rod 107 is fixed to the cross head 108. The linear motion of the BS nut 106 is transmitted to the cross head 108 by the connecting rod 107.
- Each connecting rod 107 penetrates through a guide hole 115 formed in the front end face of the flange so as to be movable in the front-rear direction. However, each connecting rod 107 is fixed in the rotation direction about the BS shaft 105 as a rotation axis by the guide hole 115. Therefore, the rotational movement of the BS nut 106 is also suppressed, and the rotational movement of the BS shaft 105 is efficiently converted into a straight movement.
- a threaded portion 1081 is formed at the center of the crosshead 108, and the ejector rod 109 is fixed to the crosshead 108 by screwing the threaded portion 1081 and the threaded portion formed at the rear end of the ejector rod 109.
- the Accordingly, the ejector rod 109 moves back and forth in accordance with the cross head 108 moving forward and backward.
- the motor shaft 1011, the coupling 104, and a part of the BS shaft 105 are accommodated in a cylindrical space 121 formed inside the housing 102.
- a part of the BS shaft 105 and the BS nut 106 are accommodated in a cylindrical space 122 formed inside the flange 103 as a drive transmission support portion.
- the housing 102 as the drive unit support portion has a small outer diameter portion formed with a small outer diameter in front thereof. When the small outer diameter portion and the inner diameter portion of the flange 103 are fitted, the housing 102 and the flange 103 are joined.
- grease (lubricant) for reducing friction between the BS shaft 105 and the BS nut 106 is at least a part of the threaded portion (threaded portion 1051) of the BS shaft 105 and the BS nut 106 ( Grease so that the lower side is immersed.
- a guide hole 115 is provided on the front end surface of the flange 103. Therefore, there is a risk that the grease leaks from the guide hole 115 as it is. In addition, grease may leak out from the fitting portion between the housing 102 and the flange 103.
- an O-ring 114 is disposed as a seal material between the guide hole 115 for allowing each connecting rod 107 to penetrate and the connecting rod 115.
- an O-ring 113 is disposed at a fitting portion between the housing 102 and the flange 103. Therefore, an O-ring 114 or an O-ring 113 is disposed as a sealing material in the hole 115 for allowing each connecting rod 107 to penetrate and the small outer diameter portion of the housing 102.
- the O-ring 114 can prevent the leakage of grease from the guide hole 115 while allowing the connecting rod 107 to move.
- the O-ring 113 can prevent grease from leaking from the fitting portion between the housing 102 and the flange 103.
- the grease in the space 122 flows out into the space 121. This is because slippage may occur between the coupling 104 and the motor shaft 121 or the BS shaft 105, and the rotation of the motor shaft 121 may not be transmitted properly. However, since it is necessary to allow the BS shaft 105 to pass through between the space 121 and the space 122 in a rotatable manner, the space between the two spaces cannot be completely blocked.
- a portion (small inner diameter portion) whose inner diameter is reduced is formed in front of the housing 102, and the bearing 110 is disposed so as to circumscribe the small inner diameter portion.
- the bearing 110 supports the BS shaft 105 at a small diameter portion formed behind the large diameter portion where the screw portion 1051 is formed.
- the lock nut 111 is screwed into the screw portion 1052 formed in the small diameter portion of the BS shaft 105 and tightened, so that the rear end surface of the large diameter portion of the BS shaft 1051 and the lock nut 111 are interposed. It is fixed with.
- the outer ring of the bearing 110 is fixed by a convex portion formed at the rear of the small inner diameter portion of the housing 102 and the bearing pressing plate 112.
- the bearing holding plate 112 is fixed to the housing 102 by bolts 1121.
- the bearing 110 By providing the bearing 110 between the space 121 and the space 122 so as to support the BS shaft 105, the space 121 and the space 122 can be blocked without hindering the rotational movement of the BS shaft 105. it can. Accordingly, the grease is prevented from flowing out into the space 121.
- the bearing 110 is desirably a sealed bearing. Further, when the bearing 110 is not sealed, an oil seal may be provided at a location adjacent to the bearing 110.
- an oil seal 117 may be disposed between the bearing pressing plate 112 and the BS shaft 105. Further, as shown in FIG. 10, an oil seal 118 may be disposed between the housing 102 and the BS shaft 105 on the motor 101 side of the lock nut 111.
- the supply of grease (greasing) to the space 122 is performed through a greasing hole 1031 formed in the flange 103.
- the greasing hole 1031 is closed after the greasing.
- greasing is performed automatically, it is only necessary to prevent backflow by applying pressure from the greasing side.
- the grease is discharged (greased) from the space 122 through a greasing hole 1032 formed in the flange 103. That is, the space 122 and the external space are connected only by the greasing hole 1031 and the greasing hole 1032.
- the BS nut 106 In response to the rotation of the BS shaft 105, the BS nut 106 is advanced. As the BS nut 106 advances, the ejector rod 109 advances through the connecting rod 107 and the cross head 108. When the ejector rod 109 moves forward, the ejector device 100 enters the state shown in FIGS. 5 and 7 (an ejected state), and the solidified molded product is projected from the movable mold 16 by the front end portion of the ejector rod 109.
- the motor shaft 1011 rotates in the reverse direction. Accordingly, the BS shaft 105 also rotates in the reverse direction, and the BS nut 106 is retracted. As the BS nut 106 is retracted, the ejector rod 109 is retracted via the connecting rod 107 and the cross head 108, and the ejector device 100 is in a non-eject state.
- FIGS. 2 to 8 are diagrams showing an example of arrangement of the ejector device to the mold clamping device. 11 and 12, the same parts as those in FIGS. 2 to 8 are denoted by the same reference numerals.
- FIG. 11 shows a non-eject state
- FIG. 12 shows an eject state.
- the rod 39 of the mold clamping device 10 is formed of a hollow structure. That is, a cylindrical space (hollow part) is formed inside the rod 39.
- the ejector device 100 is disposed in the hollow portion.
- a space 131 is formed at the central portion of the movable platen 12 from the rear end surface side according to the movement range of the cross head 108 of the ejector device 100, and between the space 131 and the front end surface of the movable platen 12. Is formed with a guide hole 132 through which the ejector rod penetrates the movable mold 16. That is, the cross head 108 moves back and forth in the space 131 formed in the movable platen 12, and the ejector rod 109 protrudes the molded product by passing through the guide hole 132 formed in the movable platen 12.
- housing 102 and the flange 103 may be formed integrally with the rod 39.
- the ball screw mechanism (the BS shaft 105 and the BS nut 106) constituting the ejector device 100 is disposed in the space inside the rod 39. .
- the space is connected to the external space only through a hole for supplying or discharging grease. Therefore, the scattering range of the lubricant by the BS shaft 105 is suppressed in the space, and the lubricant can be effectively prevented from scattering around the mold clamping device 10.
- the ejector device 100 is not a mold clamping device that performs the mold opening / closing operation by driving the linear motor 28, and is not a mold clamping device that performs the mold clamping using the magnetic force of the electromagnet 49.
- it can be effectively applied to a direct pressure type mold clamping device.
- FIG. 13 is a side view of an electric direct pressure type mold clamping device provided with an ejector device according to an embodiment of the present invention.
- the rod 206 is formed by a hollow structure like the rod 39 of the mold clamping device 10. Therefore, by disposing the ejector device 100 in the hollow portion formed by the hollow structure, the lubricant can be prevented from scattering like the mold clamping device 10.
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Abstract
Description
Claims (7)
- 一対の金型の一方が固定された第一のプラテンと、
前記一対の金型の他方が固定され、型開閉方向に進退可能な第二のプラテンと、
前記第二のプラテンに固定され、前記第一のプラテンの反対側より前記第二のプラテンに対して型締力を伝達させるロッドとを備え、
前記ロッドは中空構造であり、前記中空構造によって形成される中空部に、成形品のエジェクタ用のボールねじ機構が配設されることを特徴とする型締装置。 - 前記エジェクタ用のボールねじ機構は、ねじ軸とナットとを含み、
前記ねじ軸とナットとの螺合部は、潤滑剤に浸されていることを特徴とする請求項1記載の型締装置。 - 前記中空部は、前記ボールねじ機構が配設される第一の空間を含み、
前記第一の空間は、前記潤滑材を供給又は排出するための穴によってのみ他の空間と連結されていることを特徴とする請求項2記載の型締装置。 - 前記第一の空間は、前記ねじ軸を支持する軸受によって遮断されることを特徴とする請求項3記載の型締め装置。
- 前記軸受にはシール材が配設されていることを特徴とする請求項4記載の型締装置。
- 前記軸受は、前記ねじ軸と前記ねじ軸を回転させるための駆動軸とが締結される空間と、前記第一の空間とを遮断することを特徴とする請求項4記載の型締装置。
- 前記ナットには、当該ナットの直線運動を伝達するための伝達部材が固定され、
前記第一の空間には、前記伝達部材を貫通させるためのガイド穴が形成され、
前記伝達部材と前記ガイド穴との間には、シール材が配設されることを特徴とする請求項2記載の型締装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2008/059674 WO2009144777A1 (ja) | 2008-05-26 | 2008-05-26 | 型締装置 |
DE112008003892T DE112008003892T5 (de) | 2008-05-26 | 2008-05-26 | Formklemmvorrichtung |
CN200880129431.0A CN102046352B (zh) | 2008-05-26 | 2008-05-26 | 合模装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2008/059674 WO2009144777A1 (ja) | 2008-05-26 | 2008-05-26 | 型締装置 |
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WO2009144777A1 true WO2009144777A1 (ja) | 2009-12-03 |
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PCT/JP2008/059674 WO2009144777A1 (ja) | 2008-05-26 | 2008-05-26 | 型締装置 |
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CN (1) | CN102046352B (ja) |
DE (1) | DE112008003892T5 (ja) |
WO (1) | WO2009144777A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111016015A (zh) * | 2019-12-26 | 2020-04-17 | 上海复合材料科技有限公司 | 一种带下沉凸台复合材料背筋模具及其脱模方法 |
JP2020108926A (ja) * | 2018-12-28 | 2020-07-16 | 住友重機械工業株式会社 | 射出成形機、および射出成形機用の切換カバー |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5749153B2 (ja) * | 2011-12-26 | 2015-07-15 | 住友重機械工業株式会社 | 射出成形機 |
JP5855990B2 (ja) * | 2012-03-21 | 2016-02-09 | 住友重機械工業株式会社 | 射出成形機 |
CN113001913B (zh) * | 2016-03-31 | 2022-08-05 | 京洛株式会社 | 合模装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6395925A (ja) * | 1986-10-13 | 1988-04-26 | Fanuc Ltd | コアキシヤル・エジエクタ装置 |
JP2000309046A (ja) * | 1999-04-28 | 2000-11-07 | Sumitomo Heavy Ind Ltd | エジェクタモータのグリース飛散防止装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI230653B (en) * | 2003-01-27 | 2005-04-11 | Sumitomo Heavy Industries | Molding machine with lubrication mechanism and method for lubricating molding machine |
JP4249151B2 (ja) | 2005-04-28 | 2009-04-02 | 住友重機械工業株式会社 | 射出成形機 |
-
2008
- 2008-05-26 DE DE112008003892T patent/DE112008003892T5/de not_active Withdrawn
- 2008-05-26 CN CN200880129431.0A patent/CN102046352B/zh not_active Expired - Fee Related
- 2008-05-26 WO PCT/JP2008/059674 patent/WO2009144777A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6395925A (ja) * | 1986-10-13 | 1988-04-26 | Fanuc Ltd | コアキシヤル・エジエクタ装置 |
JP2000309046A (ja) * | 1999-04-28 | 2000-11-07 | Sumitomo Heavy Ind Ltd | エジェクタモータのグリース飛散防止装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020108926A (ja) * | 2018-12-28 | 2020-07-16 | 住友重機械工業株式会社 | 射出成形機、および射出成形機用の切換カバー |
JP7226999B2 (ja) | 2018-12-28 | 2023-02-21 | 住友重機械工業株式会社 | 射出成形機、および射出成形機用の切換カバー |
CN111016015A (zh) * | 2019-12-26 | 2020-04-17 | 上海复合材料科技有限公司 | 一种带下沉凸台复合材料背筋模具及其脱模方法 |
CN111016015B (zh) * | 2019-12-26 | 2021-11-05 | 上海复合材料科技有限公司 | 一种带下沉凸台复合材料背筋模具及其脱模方法 |
Also Published As
Publication number | Publication date |
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CN102046352B (zh) | 2014-04-30 |
CN102046352A (zh) | 2011-05-04 |
DE112008003892T5 (de) | 2011-06-09 |
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