CN115958756B - Cavity gear screw-thread drawing injection mold and double-core drawing injection molding structure thereof - Google Patents
Cavity gear screw-thread drawing injection mold and double-core drawing injection molding structure thereof Download PDFInfo
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- CN115958756B CN115958756B CN202211264673.9A CN202211264673A CN115958756B CN 115958756 B CN115958756 B CN 115958756B CN 202211264673 A CN202211264673 A CN 202211264673A CN 115958756 B CN115958756 B CN 115958756B
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 48
- 238000002347 injection Methods 0.000 title claims abstract description 46
- 239000007924 injection Substances 0.000 title claims abstract description 46
- 239000004033 plastic Substances 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 17
- 230000001050 lubricating effect Effects 0.000 claims 2
- 238000007493 shaping process Methods 0.000 claims 2
- 239000002991 molded plastic Substances 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 description 17
- 238000000605 extraction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a cavity gear screw-thread drawing injection mold and a double-core drawing injection molding structure thereof. The invention comprises a movable mould and a fixed mould, wherein the movable mould is provided with a core, a first side drawing block and a first side drawing driving part, the end part of the first side drawing block is provided with a first forming end, the first forming end stretches into the core, the first side drawing driving part is used for driving the first side drawing block to slide, the first side drawing block is connected with a second side drawing block in a sliding manner, the second side drawing block is provided with a second side drawing rod, the first forming end is provided with a first forming hole, the second side drawing rod passes through the first side drawing block and extends into the first forming hole, and a gap is reserved between the outer rod wall of the second side drawing rod and the hole wall of the first forming hole to form an injection molding space; the sliding device further comprises a second side drawing driving part, wherein the second side drawing driving part is used for driving the second side drawing block to slide. By adopting the double-core drawing structure, the possibility of drawing deformation of the mounting nozzle on the injection molded plastic part is greatly reduced, and the injection molding quality of the whole plastic part is high.
Description
Technical Field
The invention relates to an injection mold, in particular to a cavity gear screw-drawing injection mold and a double-core injection molding structure thereof.
Background
The side core pulling mechanism is commonly used in the injection mold forming mechanism, such as a side-pulling type bottom shell injection mold disclosed in Chinese patent publication No. CN215039824U, and mainly comprises a lower mold base and a transverse plate, wherein a side core is arranged on the lower mold base and can slide along the side wall of the lower mold base, a cylinder is arranged on the transverse plate and drives a telescopic rod to move up and down, an upper mold is arranged at the end part of the telescopic rod, and an inclined guide column is arranged on the upper mold; the cylinder drives the upper die to move downwards, the inclined guide pillar on the upper die is inserted into the side core, the side core can move, and the end part of the side core moves out of the cavity, so that side core pulling movement is completed.
The structure of the plastic part to be injection molded at present is shown in the attached figure 1, and the main structure of the plastic part comprises a main body a, wherein the upper end of the main body a is provided with a threaded opening d, the side wall of the main body a is provided with a mounting nozzle b, the inside of the mounting nozzle b is provided with a through hole c, and especially, the shape of the mounting nozzle b is in a slender shape, the wall thickness of the mounting nozzle b provided with the through hole c is thinner, if the side core pulling mechanism with a single side core in the prior art is adopted, the mounting nozzle b is easy to be pulled and deformed, and the injection molding quality of a product is low.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a dual-core injection molding structure, in which the mounting nozzle on the injection molded plastic part is not easy to be pulled and deformed, and the injection molding quality of the product is high.
In order to solve the technical problems, the technical scheme of the invention is as follows:
The double-core drawing injection molding structure comprises a movable mold and a fixed mold, wherein a core, a first side drawing block and a first side drawing driving part are arranged on the movable mold, a first molding end is arranged at the end part of the first side drawing block, the first molding end stretches into the core, the first side drawing driving part is used for driving the first side drawing block to slide, a second side drawing block is connected onto the first side drawing block in a sliding manner, a second side drawing rod is arranged on the second side drawing block, a first molding hole is formed in the first molding end, the second side drawing rod penetrates through the first side drawing block and stretches into the first molding hole, and a gap is reserved between the outer rod wall of the second side drawing rod and the hole wall of the first molding hole to form an injection molding space;
the sliding device further comprises a second side drawing driving part, wherein the second side drawing driving part is used for driving the second side drawing block to slide.
Through the technical scheme, after the movable die and the fixed die are mutually clamped, the plastic part can be injection molded on the core, meanwhile, the plastic solution can also enter an injection molding space, and a mounting nozzle with a through hole is correspondingly injection molded in the injection molding space until the plastic part is completely injection molded on the core;
After the movable mold and the fixed mold are separated from each other, the main body of the plastic part is positioned on the mold core, the second side drawing driving part drives the second side drawing block to move, the second side drawing block drives the second side drawing rod to move, the second side drawing rod is firstly drawn out from the first molding hole, in the drawing process of the second side drawing rod, the wall of the first molding hole on the first side drawing rod can support the mounting nozzle which is injection molded in the injection molding space because the first side drawing block does not move, the deformation degree of the mounting nozzle is controlled, after the second side drawing rod is drawn out of the injection molding space, the first side drawing driving part can drive the first side drawing block to slide, and the mounting nozzle with a through hole can be drawn out from the injection molding space of the first side drawing block to finish side drawing and demolding;
in the core pulling process, the double-core pulling structure is adopted, so that the possibility of pulling deformation of the mounting nozzle on the injection molded plastic part is greatly reduced, and the injection molding quality of the whole plastic part is high.
Preferably, the second side-pulling driving part comprises a second inclined guide pillar, the second inclined guide pillar is mounted on the fixed mold, and the second inclined guide pillar is inserted into the second side-pulling block and used for driving the second side-pulling block to slide.
Through the technical scheme, the mold opening and closing action between the fixed mold and the movable mold is fully utilized, when the fixed mold and the movable mold are separated from each other, the fixed mold can drive the second inclined guide pillar to synchronously move, the second inclined guide pillar can drive the second side drawing block to correspondingly slide, and the mold opening and closing mechanism is compact in structure and stable in driving.
Preferably, the first side is taken out and is equipped with the groove that slides on the piece, the vertical cooperation board of all installing in the left and right sides in groove that slides, the tank bottom position in groove that slides installs horizontal cooperation board, vertical cooperation board is close to be equipped with on the side of horizontal cooperation board and slide the breach, slide the breach with form the passageway that slides between the horizontal cooperation board, the second side is taken out the piece and is slided and connect in the passageway that slides.
According to the technical scheme, the second side drawing block can reciprocate in the sliding groove for more times, so that the vertical matching plate and the horizontal matching plate are respectively arranged at the left side, the right side and the bottom of the sliding groove, and the second side drawing block can be in direct contact with the vertical matching plate and the horizontal matching plate; when the vertical matching plate or the horizontal matching plate is worn, the vertical matching plate and the horizontal matching plate are directly replaced, and the maintenance, the disassembly and the assembly are convenient.
Preferably, the first side drawing block is internally provided with graphite strips, and the graphite strips penetrate through the transverse matching plate and can contact with the side wall of the second side drawing block.
Through the technical scheme, along with the reciprocating sliding motion of the second side drawing block, the graphite strips can be directly wiped on the side wall of the second side drawing block, and then the sliding smoothness of the second side drawing block can be improved.
Preferably, a lubrication groove for installing the graphite strips is formed in the first side drawing block, a thrust spring is installed in the lubrication groove, and the thrust spring is used for pushing the graphite strips to move to one side of the second side drawing block.
Through the technical scheme, the end part of the graphite strip can be worn continuously, at the moment, the thrust spring is applied to the graphite strip by elasticity, and the graphite strip can always stably abut against the side wall of the second side drawing block, so that the sliding smoothness of the second side drawing block is maintained.
Preferably, the second side extraction rod is in threaded connection with the second side extraction block.
According to the technical scheme, according to the product requirements of different batches, the hole diameters of the through holes in the mounting nozzle are different, the second side drawing rods with different model sizes are replaced according to the hole diameters of the through holes in the mounting nozzle to be injection molded, and the threaded connection mode has two advantages, so that the disassembly, assembly and replacement of the first side drawing rod and the second side drawing rod are convenient; and secondly, the size of the interval between the second side drawing rod and the second side drawing block can be controlled.
The second object of the invention is to provide a cavity gear thread drawing injection mold, which is not only difficult to draw and deform of a mounting nozzle on an injection molded plastic part, but also high in injection molding quality of a product, and can stabilize the thread opening characteristic of the injection molded plastic part.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the cavity gear screw-thread drawing injection mold comprises the double-core drawing injection molding structure;
The fixed die is rotationally connected with a forming sleeve, the end part of the forming sleeve, which is close to one side of the core, is provided with a thread forming end for injection molding a thread opening of a plastic part, and a driving gear is arranged on the forming sleeve;
and the fixed die is provided with a tooth driving part for driving the driving gear to rotate.
Through the technical scheme, firstly, by utilizing the double-core-pulling injection molding structure, the mounting nozzle on the plastic part which can be injection molded is not easy to draw and deform, and the injection molding quality of the product is high; secondly, the thread forming end of the end part of the forming sleeve is used for forming a thread opening of a plastic part in an injection molding mode, when demolding is needed, the tooth driving part drives the driving gear to rotate, the driving gear drives the forming sleeve to rotate, the thread forming end of the end part of the forming sleeve can be smoothly separated from the thread opening of the plastic part which is formed in an injection molding mode, and the thread opening characteristic of the plastic part in the injection molding mode can be stabilized.
Preferably, the tooth driving part comprises a transmission gear, a transmission rack and a tooth driving source, wherein the tooth driving source drives the transmission rack to reciprocate, and the transmission gear is installed and meshed between the transmission gear and the transmission rack.
Through the technical scheme, the tooth driving source drives the transmission rack to reciprocate, the transmission rack is meshed with the transmission gear, and the transmission gear drives the driving gear to rotate; on the one hand, through the transmission relation, the transmission stability is higher, and on the other hand, the transmission gear with proper model can be selected to carry out the transmission ratio adjustment.
Preferably, the tooth driving source comprises a tooth driving cylinder, a first hook part is arranged on a cylinder shaft of the tooth driving cylinder, a second hook part is arranged at the end part of the transmission rack, the first hook part is mutually hooked with the second hook part, and the first hook part is connected with the second hook part through a bolt.
Through the technical scheme, when the movement stroke of the transmission rack is required to be adjusted, the first hook part and the second hook part can be easily separated, and other types of tooth driving cylinders are replaced; secondly, adopt first hook, second hook to collude the connection, combine bolted connection again, installation connection stability is high, and the drive is more steady.
Preferably, a mounting bracket is arranged on the side wall of the tooth driving cylinder, and the mounting bracket is arranged on the outer side wall of the fixed die.
Through above-mentioned technical scheme, the dismouting between tooth drive cylinder and the cover half lateral wall is more convenient, stable.
The technical effects of the invention are mainly as follows:
(1) The injection mold adopts a double-core injection molding structure, so that the possibility of drawing deformation of the mounting nozzle on the injection molded plastic part is greatly reduced, and the injection molding quality of the whole plastic part is high;
(2) The injection mold adopts a cavity gear screw thread drawing injection molding structure, and can stably injection mold the screw thread opening characteristic on the plastic piece;
(3) The actual service life of the injection mold can be prolonged by disassembling and assembling the vertical matching plate or the horizontal matching plate;
(4) By arranging the graphite strips, the friction force between the second side drawing block and the first side drawing block is greatly reduced, and the abrasion loss caused by the second side drawing block and the first side drawing block is reduced.
Drawings
FIG. 1 is a schematic view of a plastic part to be injection molded;
FIG. 2 is a schematic view of a mounting structure of the first embodiment;
fig. 3 is an enlarged view of a portion a of fig. 2;
FIG. 4 is a schematic partial cross-sectional view of a first embodiment;
Fig. 5 is an enlarged view of a portion B of fig. 4;
FIG. 6 is a schematic exploded view of the structure of the first embodiment;
fig. 7 is a schematic diagram of a structure installation structure of a second embodiment;
FIG. 8 is a diagram showing the structural relationship among the tooth driving portion, the tooth driving source and the forming sleeve in the second embodiment;
FIG. 9 is a schematic partial cross-sectional view of a third embodiment;
fig. 10 is an enlarged view of a portion C of fig. 9;
Fig. 11 is an illustration showing a fitting structure of the third embodiment, which is used for mainly showing the fitting relationship among the rotating frame, the tooth driving source, the first limiting member and the second limiting member.
Reference numerals: a. a main body; b. installing a nozzle; c. a through hole; d. a threaded port; 1. a fixed mold; 2. a movable mold; 3. a core; 4. a first side drawer block; 41. a first shaped end; 5. a first side extraction driving part; 6. a second side extraction block; 7. a second side extraction rod; 8. a first molding hole; 9. an injection molding space; 10. a second side-draw driving part; 11. the second inclined guide post; 12. a slip groove; 13. a vertical matching plate; 14. a transverse mating plate; 15. a slip path; 16. graphite strips; 17. a lubrication groove; 18. a thrust spring; 19. forming a sleeve; 191. a thread forming end; 20. a drive gear; 21. a tooth driving part; 22. a transmission gear; 23. a drive rack; 24. a tooth drive source; 241. a tooth driving cylinder; 25. a first hook portion; 26. a second hook portion; 27. a mounting bracket; 28. a slip notch; 29. a rotating frame; 291. a rotating end; 292. a slip end; 30. a rotating passage; 31. a mounting part; 311. a mounting foot; 312. a first bolt; 313. a second bolt; 32. a first limit position; 33. a second limit position; 34. a first limiting member; 341. the first limiting end; 342. a first drive end; 35. a first limit spring; 36. a second limiting piece; 361. the second limiting end; 362. a second drive end; 37. a second limit spring; 38. a middle gear; 39. a first tooth surface; 40. a second tooth surface.
Detailed Description
The following detailed description of the invention is provided in connection with the accompanying drawings to facilitate understanding and grasping of the technical scheme of the invention.
Embodiment one:
The double-core injection molding structure is mainly used for injection molding a mounting nozzle b with a through hole c of a plastic part main body a shown in figure 1.
Referring to fig. 2, the injection molding structure mainly includes a movable mold 2, and a core 3, a first side drawing block 4, and a first side drawing driving portion 5 are disposed on the movable mold 2.
Referring to fig. 1 and 2, a body a of the plastic part is injection molded onto the core 3.
Referring to fig. 4 and 5, a first molding end 41 is provided at an end of the first side drawer block 4, the first molding end 41 extends into the core 3, and the first side drawer driving portion 5 is used for driving the first side drawer block 4 to slide. The first side-pumping driving part 5 can be a driving cylinder. The first shaped end 41 is provided with a first shaped aperture 8.
Referring to fig. 3 and 6, a sliding groove 12 is formed on the first side drawer block 4, vertical matching plates 13 are mounted on the left and right sides of the sliding groove 12, a horizontal matching plate 14 is mounted at the bottom of the sliding groove 12, a sliding gap 28 is formed on a side of the vertical matching plate 13 close to the horizontal matching plate 14, a sliding channel 15 is formed between the sliding gap 28 and the horizontal matching plate 14, and the second side drawer block 6 is slidably connected in the sliding channel 15.
Referring to fig. 5, the second side drawing block 6 is provided with a second side drawing rod 7, the second side drawing rod 7 passes through the first side drawing block 4 and extends into the first molding hole 8, a gap is left between an outer rod wall of the second side drawing rod 7 and a hole wall of the first molding hole 8 to form an injection molding space 9, and a mounting nozzle b with a through hole c is injection molded in the injection molding space 9.
Referring to fig. 4 and 5, the sliding device further comprises a fixed mold 1 and a second side-pulling driving part 10, wherein the second side-pulling driving part 10 is mainly used for driving the second side-pulling block 6 to slide. In detail, the second side-pulling driving part 10 includes a second inclined guide post 11, the second inclined guide post 11 is mounted on the fixed mold 1, the second inclined guide post 11 is inserted into the second side-pulling block 6 and is used for driving the second side-pulling block 6 to slide, and the sliding direction of the second side-pulling block 6 is parallel to the sliding direction of the first side-pulling block 4.
In addition, referring to fig. 6, a lubrication groove 17 is formed in the first side drawing block 4, a graphite strip 16 is installed in the lubrication groove 17, a thrust spring 18 is installed in the lubrication groove 17, the thrust spring 18 is used for pushing the graphite strip 16 to move towards the second side drawing block 6, and the graphite strip 16 penetrates through the transverse matching plate 14 and can contact with the side wall of the second side drawing block 6.
In addition, referring to fig. 5, the second side extraction rod 7 and the second side extraction block 6 may be connected by a threaded connection.
The injection molding process of the double core-pulling injection molding structure comprises the following steps:
(1) After the movable die 2 and the fixed die 1 are mutually clamped, the plastic part can be injection molded on the core 3, meanwhile, the plastic solution can also enter an injection molding space 9, and a mounting nozzle b with a through hole c is correspondingly injection molded in the injection molding space 9 until the plastic part is completely injection molded on the core 3;
(2) After the movable die 2 and the fixed die 1 are mutually separated, a main body a of a plastic part is positioned on the core 3, the fixed die 1 is provided with a second inclined guide post 11 which is pulled to move towards one side deviating from the movable die 2, the second inclined guide post 11 drives a second side drawing block 6 to move, the second side drawing block 6 drives a second side drawing rod 7 to move, the second side drawing rod 7 is firstly drawn out from a first forming hole 8, in the process of drawing out the second side drawing rod 7, as the first side drawing block 4 does not move in position, the wall of the first forming hole 8 on the first side drawing rod can support a mounting nozzle b which is injection molded in an injection molding space 9, the deformation degree of the mounting nozzle b is controlled, after the second side drawing rod 7 is drawn out of the injection molding space 9, the first side drawing driving part 5 can drive the first side drawing block 4 to slide, and the mounting nozzle b with a through hole c can be pulled out of the injection molding space 9 of the first side drawing block 4, so that side drawing and demolding is completed.
Embodiment two:
In addition to the double-core injection molding structure, as shown in fig. 7 and 8, a molding sleeve 19 is rotatably connected to the fixed mold 1, a thread molding end 191 for injection molding a plastic part thread d is arranged at the end of the molding sleeve 19 near the side of the core 3, and a driving gear 20 is mounted on the molding sleeve 19; the fixed mold 1 is provided with a tooth driving portion 21 for driving the driving gear 20 to rotate, so as to be used for injection molding a threaded opening d on a main body a as shown in fig. 1.
Referring to fig. 8, the tooth driving portion 21 includes a transmission gear 22, a transmission rack 23, and a tooth driving source 24, wherein the tooth driving source 24 drives the transmission rack 23 to reciprocate, and the transmission gear 22 is engaged between the driving gear 20 and the transmission rack 23.
Referring to fig. 8, the tooth driving source 24 includes a tooth driving cylinder 241, a first hook 25 is mounted on a cylinder shaft of the tooth driving cylinder 241, a second hook 26 is disposed at an end of the driving rack 23, the first hook 25 and the second hook 26 are hooked with each other, and the first hook 25 and the second hook 26 are connected by a bolt.
In addition, referring to fig. 7, a mounting bracket 27 is provided on the side wall of the tooth driving cylinder 241, and the mounting bracket 27 is mounted on the outer side wall of the stationary mold 1.
Injection molding process of the cavity gear screw-out injection mold comprises the following steps: in the process of separating the movable mold 2 from the fixed mold 1, the tooth driving cylinder 241 drives the transmission rack 23 to move through the first hook part 25 and the second hook part 26, the transmission rack 23 drives the transmission gear 22 and the driving gear 20 to rotate, the driving gear 20 drives the forming sleeve 19 to rotate, the thread forming end 191 at the end part of the forming sleeve 19 gradually rotates to be separated from the thread opening d of the injection molded plastic part, and the demolding is completed.
Embodiment III: the difference from the second embodiment is that:
Referring to fig. 9, the rotary rack 29 further includes a rotary rack 29, two ends of the rotary rack 29 are respectively a rotary end 291 and a sliding end 292, the rotary end 291 is rotatably connected to the gear shaft of the transmission gear 22, and the transmission rack 23 penetrates and is slidably connected to the sliding end 292;
the fixed die 1 is provided with a rotating channel 30, and the transmission rack 23, the tooth driving cylinder 241 and the rotating frame 29 can pass through the rotating channel 30 and rotate around the gear shaft of the transmission gear 22;
the tooth driving cylinder 241 is provided with a mounting portion 31, and the mounting portion 31 is used for mounting the tooth driving cylinder 241 on the outer side wall of the fixed mold 1.
Therefore, in the actual installation process, since the installation station on the injection molding machine for installing the injection mold is fixed, and for the cavity gear screw-threaded injection mold, the overall length of the tooth driving cylinder 241 on the injection mold is longer, if a shielding object such as a wall exists at the side of the injection mold, the installation is blocked; at this time, the mounting part 31 can be loosened, the tooth driving cylinder 241 can rotate around the gear shaft of the transmission gear 22, the tooth driving cylinder 241 can move through the rotating channel 30 on the fixed mold 1, the relative position of the tooth driving cylinder 241 and the injection mold can be changed, and then the tooth driving cylinder 241 is locked on the outer side wall of the fixed mold 1 through the mounting part 31; the above operation process can adjust the position of the fixed die 1 where the gear driving cylinder 241 is located according to actual needs, has high installation flexibility, and is suitable for various complex installation environments.
Referring to fig. 9 and 10, the mounting portion 31 includes a mounting leg 311, the mounting leg 311 is slidably connected to the tooth driving cylinder 241, a first bolt 312 is disposed on the tooth driving cylinder 241, the first bolt 312 penetrates and is screwed to the tooth driving cylinder 241, and an end of the first bolt 312 can prop against a sidewall of the mounting leg 311 and is used for limiting the movement of the mounting leg 311;
And a second bolt 313 is further included, and the second bolt 313 is used for connecting the end part of the mounting foot 311 to the side wall of the fixed mold 1.
Therefore, since the gear shaft of the transmission gear 22 is not disposed at the center of the fixed mold 1, after the tooth driving cylinder 241 rotates, there is a certain change in the distance between the tooth driving cylinder 241 and the side wall of the fixed mold 1, at this time, the mounting leg 311 is pushed to the side close to the side wall of the fixed mold 1 by moving the mounting leg 311, that is, when the distance between the tooth driving cylinder 241 and the side wall of the fixed mold 1 becomes large, when the distance between the tooth driving cylinder 241 and the side wall of the fixed mold 1 becomes small, the mounting leg 311 is pushed to the side far from the side wall of the fixed mold 1, so that the mounting leg 311 is always attached to the outer side wall of the fixed mold 1, and then the end of the mounting leg 311 is mounted on the side wall of the fixed mold 1 by the second bolt 313, and the first bolt 312 can position the mounting leg 311 on the tooth driving cylinder 241, so that the mounting flexibility is high and the mounting is stable.
Referring to fig. 8, 9 and 10, the transmission rack 23, the tooth driving cylinder 241 and the rotating frame 29 rotate around the fixed mold 1 to form a first limit position 32 and a second limit position 33;
the fixed die 1 is slidably connected with a first limiting piece 34, a first limiting spring 35, a second limiting piece 36 and a second limiting spring 37;
The two ends of the first limiting member 34 are respectively a first limiting end 341 and a first driving end 342, the first driving end 342 can extend to the outer side of the fixed mold 1, the first limiting end 341 is used for propping against the outer sleeve wall of the forming sleeve 19, and the first limiting spring 35 is connected between the fixed mold 1 and the first limiting member 34;
When the mounting leg 311 is pressed against the first driving end 342, the first limiting member 34 overcomes the tension of the first limiting spring 35, and the first limiting end 341 of the first limiting member 34 is separated from the outer wall of the forming sleeve 19;
when the mounting leg 311 is separated from the first driving end 342, the first limiting spring 35 pulls the first limiting end 341 of the first limiting member 34 to abut against the outer wall of the forming sleeve 19;
the two ends of the second limiting member 36 are respectively a second limiting end 361 and a second driving end 362, the second driving end 362 can extend to the outside of the fixed mold 1, the second limiting end 361 is used for propping against the outer wall of the forming sleeve 19, and the second limiting spring 37 is connected between the fixed mold 1 and the second limiting member 36;
When the mounting leg 311 is pressed against the second driving end 362, the second limiting member 36 overcomes the tension of the second limiting spring 37, and the second limiting end 361 of the second limiting member 36 is separated from the outer wall of the forming sleeve 19;
when the mounting leg 311 is separated from the second driving end 362, the second limiting spring 37 pulls the second limiting end 361 of the second limiting member 36 to abut against the outer wall of the forming sleeve 19;
the first driving end 342 of the first stopper 34 and the second driving end 362 of the second stopper 36 are respectively located on different sidewalls of the fixed mold 1.
Therefore, the tooth driving cylinder 241 may be rotated to the first limit position 32 or the second limit position 33 according to the actual installation condition;
Taking the example of transferring the tooth driving cylinder 241 from the first limit position 32 to the second limit position 33, removing the second bolt 313 of the mounting foot 311 positioned on the first limit position 32 and the first bolt 312 positioned on the tooth driving cylinder 241, wherein the mounting foot 311 is separated from the outer side wall of the fixed mold 1, at this time, the first limiting spring 35 pulls the first limiting piece 34 to move, the first limiting end 341 of the first limiting piece 34 is propped against the outer jacket wall of the forming sleeve 19, the rotation of the whole forming sleeve 19 can be limited, and at this time, the forming sleeve 19 cannot rotate accidentally due to the position change of the tooth driving cylinder 241;
When the gear driving cylinder 241 is shifted to the second limit position 33, the mounting leg 311 moves to the side of the fixed mold 1, the mounting leg 311 abuts against the outer side wall of the fixed mold 1, meanwhile, the end of the mounting leg 311 abuts against the second driving end 362 of the second limiting member 36, the second limiting member 36 overcomes the pulling force of the second limiting spring 37, the second limiting end 361 of the second limiting member 36 can be separated from the outer wall of the forming sleeve 19, and the first bolt 312 and the second bolt 313 are locked, so that the forming sleeve 19 can rotate smoothly.
It should be noted that, after the tooth driving cylinder 241 rotates to the first limit position 32 and is fixed by the second bolt 313, the outer member is required to pull the second limiting member 36 out of the fixed mold 1, so that the second limiting end 361 of the second limiting member 36 is separated from the outer wall of the forming sleeve 19, so as to ensure smooth rotation of the subsequent forming sleeve 19; on the contrary, when the tooth driving cylinder 241 rotates to the second limit position 33 and is fixed by the second bolt 313, the outer member is required to pull the first limiting member 34 out of the fixed mold 1, so that the first limiting end 341 of the first limiting member 34 is separated from the outer wall of the forming sleeve 19, so as to ensure smooth rotation of the subsequent forming sleeve 19.
Of course the following solutions can also be used: referring to fig. 9 and 11, the gear further includes a middle gear 38, a first tooth surface 39 is disposed on a side wall of the first limiting member 34, a second tooth surface 40 is disposed on a side wall of the second limiting member 36, and the first tooth surface 39 and the second tooth surface 40 are engaged with each other through the middle gear 38;
The first limiting end 341 of the first limiting member 34 and the second limiting end 361 of the second limiting member 36 can approach or separate from the forming sleeve 19 at the same time.
Therefore, after the gear driving cylinder 241 rotates to the first limit position 32 and is fixed by the second bolt 313, the mounting leg 311 will abut against the first driving end 342 of the first limiting member 34, the first limiting end 341 on the first limiting member 34 is separated from the outer wall of the forming sleeve 19, at this time, the first tooth surface 39 on the first limiting member 34 is meshed with the middle gear 38, the middle gear 38 is meshed with the second tooth surface 40, and the second limiting end 361 of the second limiting member 36 is also separated from the outer wall of the forming sleeve 19, so as to ensure smooth rotation of the subsequent forming sleeve 19;
Correspondingly, after the gear driving cylinder 241 rotates to the second limit position 33 and is fixed by the second bolt 313, the mounting leg 311 will abut against the second driving end 362 of the second limiting member 36, the second limiting end 361 on the second limiting member 36 is separated from the outer wall of the forming sleeve 19, at this time, the second tooth surface 40 on the second limiting member 36 is meshed with the middle gear 38, the middle gear 38 is meshed with the first tooth surface 39 again, and the first limiting end 341 of the first limiting member 34 is also separated from the outer wall of the forming sleeve 19, so as to ensure smooth rotation of the subsequent forming sleeve 19;
Conversely, when the second bolt 313 is loosened, the tooth driving cylinder 241 is separated from the first limit position 32, the mounting leg 311 is separated from the first driving end 342 of the first limiting member 34, the first limiting spring 35 pulls the first limiting member 34, the first limiting end 341 on the first limiting member 34 is close to the outer wall of the forming sleeve 19, at this time, the first tooth surface 39 on the first limiting member 34 is meshed with the middle gear 38, the middle gear 38 is meshed with the second tooth surface 40, the second limiting end 361 of the second limiting member 36 is also close to the outer wall of the forming sleeve 19, and the forming sleeve 19 is limited;
Correspondingly, when the second bolt 313 is loosened, the tooth driving cylinder 241 is disengaged from the second limit position 33, the mounting leg 311 is disengaged from the second driving end 362 of the second limiting member 36, the second limiting spring 37 pulls the second limiting member 36, the second limiting end 361 on the second limiting member 36 is close to the outer wall of the forming sleeve 19, at this time, the second tooth surface 40 on the second limiting member 36 is meshed with the middle gear 38, the middle gear 38 is meshed with the first tooth surface 39, the first limiting end 341 of the first limiting member 34 is also close to the outer wall of the forming sleeve 19, and the forming sleeve 19 is limited.
In conclusion, the first limiting piece 34 and the second limiting piece 36 can be automatically locked or unlocked without using an external piece for auxiliary positioning, so that the automatic locking or unlocking device is higher in automation degree and convenient to use.
Of course, the above is only a typical example of the invention, and other embodiments of the invention are also possible, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of the invention claimed.
Claims (6)
1. The utility model provides a die cavity gear screw thread injection mold is taken out to die cavity gear, includes movable mould (2), cover half (1), be equipped with core (3), first side on movable mould (2) and take out piece (4), first side and take out drive portion (5), first side is taken out piece (4) tip and is equipped with first shaping end (41), first shaping end (41) stretch into in core (3), first side is taken out drive portion (5) and is used for driving first side and take out piece (4) and slide, characterized by:
The first side drawing block (4) is connected with a second side drawing block (6) in a sliding manner, a second side drawing rod (7) is arranged on the second side drawing block (6), a first forming hole (8) is formed in the first forming end (41), the second side drawing rod (7) penetrates through the first side drawing block (4) and extends into the first forming hole (8), and a gap is reserved between the outer rod wall of the second side drawing rod (7) and the hole wall of the first forming hole (8) to form an injection molding space (9);
the sliding device further comprises a second side drawing driving part (10), wherein the second side drawing driving part (10) is used for driving the second side drawing block (6) to slide;
The fixed die (1) is rotationally connected with a forming sleeve (19), a thread forming end (191) for injection molding a plastic part thread opening (d) is arranged at the end part of the forming sleeve (19) close to one side of the core (3), and a driving gear (20) is arranged on the forming sleeve (19);
The fixed die (1) is provided with a tooth driving part (21) for driving the driving gear (20) to rotate;
the tooth driving part (21) comprises a transmission gear (22), a transmission rack (23) and a tooth driving source (24), the tooth driving source (24) drives the transmission rack (23) to reciprocate, and the transmission gear (22) is installed and meshed between the driving gear (20) and the transmission rack (23);
the tooth driving source (24) comprises a tooth driving cylinder (241), a first hook part (25) is arranged on a cylinder shaft of the tooth driving cylinder (241), a second hook part (26) is arranged at the end part of the transmission rack (23), the first hook part (25) is hooked with the second hook part (26), and the first hook part (25) is connected with the second hook part (26) through a bolt;
a mounting bracket (27) is arranged on the side wall of the tooth driving cylinder (241), and the mounting bracket (27) is arranged on the outer side wall of the fixed die (1);
The device further comprises a rotating frame (29), wherein two ends of the rotating frame (29) are respectively a rotating end (291) and a sliding end (292), the rotating end (291) is rotatably connected to a gear shaft of the transmission gear (22), and the transmission rack (23) penetrates through and is connected to the sliding end (292) in a sliding manner;
the fixed die (1) is provided with a rotating channel (30), and the transmission rack (23), the tooth driving cylinder (241) and the rotating frame (29) can pass through the rotating channel (30) and rotate around a gear shaft of the transmission gear (22);
The tooth driving cylinder (241) is provided with a mounting part (31), and the mounting part (31) is used for mounting the tooth driving cylinder (241) on the outer side wall of the fixed die (1).
2. The cavity gear threading injection mold of claim 1, wherein: the second side drawing driving part (10) comprises a second inclined guide pillar (11), the second inclined guide pillar (11) is installed on the fixed die (1), and the second inclined guide pillar (11) is inserted into the second side drawing block (6) and used for driving the second side drawing block (6) to slide.
3. The cavity gear threading injection mold of claim 1, wherein: the sliding block is characterized in that the sliding groove (12) is formed in the first side drawing block (4), vertical matching plates (13) are arranged on the left side and the right side of the sliding groove (12), transverse matching plates (14) are arranged at the groove bottom of the sliding groove (12), sliding notches (28) are formed in the side edges, close to the transverse matching plates (14), of the vertical matching plates (13), sliding channels (15) are formed between the sliding notches (28) and the transverse matching plates (14), and the second side drawing block (6) is connected in the sliding channels (15) in a sliding mode.
4. A cavity gear threading injection mold according to claim 3, characterized in that: and graphite strips (16) are arranged in the first side drawing block (4), and the graphite strips (16) penetrate through the transverse matching plates (14) and can be contacted with the side wall of the second side drawing block (6).
5. The cavity gear threading injection mold of claim 4, wherein: the lubricating groove (17) for mounting the graphite strips (16) is formed in the first side drawing block (4), a thrust spring (18) is mounted in the lubricating groove (17), and the thrust spring (18) is used for pushing the graphite strips (16) to move to one side of the second side drawing block (6).
6. The cavity gear threading injection mold of claim 1, wherein: the second side drawing rod (7) is connected with the second side drawing block (6) in a threaded mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211264673.9A CN115958756B (en) | 2022-10-17 | 2022-10-17 | Cavity gear screw-thread drawing injection mold and double-core drawing injection molding structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211264673.9A CN115958756B (en) | 2022-10-17 | 2022-10-17 | Cavity gear screw-thread drawing injection mold and double-core drawing injection molding structure thereof |
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| CN115958756B true CN115958756B (en) | 2024-06-07 |
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