CN114851486B - Large-stroke side core-pulling die structure with rack not separated from gear - Google Patents
Large-stroke side core-pulling die structure with rack not separated from gear Download PDFInfo
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- CN114851486B CN114851486B CN202210678836.1A CN202210678836A CN114851486B CN 114851486 B CN114851486 B CN 114851486B CN 202210678836 A CN202210678836 A CN 202210678836A CN 114851486 B CN114851486 B CN 114851486B
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- rack
- die
- block
- limiting
- spring
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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
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
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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
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
-
- 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
- B29C45/84—Safety devices
Abstract
The invention discloses a large-stroke side core-pulling die structure with a rack not separated from a gear, which comprises the following components: the device comprises a front die, a rear die and a sliding block, wherein a side core pulling mechanism is arranged between the front die and the rear die and comprises a first rack, a second rack and a transmission gear, and the second rack is fixed on the sliding block and meshed with the transmission gear; the front die is provided with a first fixed block, a travel limiting cavity is arranged in the first fixed block, the first rack is meshed with the transmission gear, and one end of the first rack is movably arranged in the travel limiting cavity; when the front die is opened by a safe distance relative to the rear die, the first rack is driven to move along by the first fixed block, and the sliding block is driven to loose core by the transmission of the transmission gear and the second rack. The rack is not separated from the large-stroke side core-pulling die structure of the gear, so that the clamping condition of the gear and the rack can be avoided, and the stability of the die opening and closing actions is improved.
Description
Technical Field
The invention relates to the technical field of injection molds, in particular to a large-stroke side core-pulling mold structure with racks not separated from gears.
Background
The injection mold is a common mold for molding plastic products, and aims at the fact that in injection molding of some tubular products, the length of a required core pulling is large, if the core pulling is directly performed by adopting an inclined guide post matched with a sliding block, the required length of the inclined guide post is often several times of the core pulling length, and therefore a normal open mold is difficult to realize. Therefore, the hydraulic cylinder is generally adopted for the large-stroke core-pulling traditional die, and the structure not only can increase the cost of the die and the occupied space of the die, but also can prolong the molding period of the product, thereby being very unfavorable for production. At present, the existing injection mold has a slide block core pulling structure with racks and gears, and because the racks and the gears are in one-to-one transmission, that is to say, the mold opening stroke is consistent with the slide block stroke, a back pressure plate on the slide block can interfere with an inclined plane on a front mold in the mold opening process, therefore, a section of empty teeth are needed to be made on the racks, the slide block is driven to pull cores after a section of safe distance is ensured, but the gear can easily clamp the racks during return, and the mold cannot be closed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a large-stroke side core-pulling die structure with a rack, which is free from the gear, so that the clamping condition of the gear and the rack is avoided, and the stability of the die opening and closing actions is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a rack does not break away from the large stroke side loose core mould structure of the gear, comprising: the device comprises a front die, a rear die and a sliding block, wherein the front die and the rear die are arranged oppositely and form a cavity for injection molding products therebetween, the sliding block is arranged on the rear die in a sliding manner, one end of the sliding block stretches into the cavity, a side core pulling mechanism is arranged between the front die and the rear die and comprises a first rack arranged along the opening and closing direction, a second rack perpendicular to the first rack and a transmission gear, and the second rack is fixed on the sliding block and meshed with the transmission gear; the front die is provided with a first fixed block, a travel limiting cavity is arranged in the first fixed block, the first rack is meshed with the transmission gear, and one end of the first rack is movably arranged in the travel limiting cavity; when the die is opened, after the front die is opened a safe distance relative to the rear die, the first rack is driven to move along with the first fixed block, and the sliding block is driven to slide along the direction perpendicular to the die opening and closing direction through the transmission of the transmission gear and the second rack to loose core.
As a further improvement of the invention, a first spring is arranged in the stroke limiting cavity, one end of the first spring is elastically propped against the first rack, and the first rack is always provided with elastic force opposite to the die opening direction.
As a further improvement of the invention, one end of the first rack, which is positioned in the travel limiting cavity, is provided with a limiting boss, the travel limiting cavity is provided with an inner bottom wall which is right opposite to the limiting boss, and the distance between the inner bottom wall and the limiting boss is consistent with the safety distance.
As a further improvement of the invention, a rack limiting mechanism is arranged between the front die and the rear die and is used for limiting the first rack, so that the first rack can synchronously move along with the front die during die assembly, and is separated from the first rack after the safety distance remains between the front die and the rear die for die assembly.
As a further improvement of the invention, the rack limiting mechanism comprises a spring block which is accommodated in a second accommodating groove arranged on the front die and is positioned at one side of the first rack, and a limiting step is arranged at one side of the first rack facing the spring block; when the front die is opened for the safety distance relative to the rear die, the elastic block ejects out to enable one end of the elastic block to protrude out of the second accommodating groove and stop on the limiting step; when the front die is clamped relative to the rear die and the safety distance is remained, the elastic block returns to the second accommodating groove and is separated from the limiting step.
As a further improvement of the invention, the rack limiting mechanism further comprises a latch and a second spring, wherein the second spring is accommodated in the second accommodating groove, and the elastic force of the second spring acting on the elastic block can drive the elastic block to move towards the first rack; the bolt is fixed on the rear mould and is used for avoiding the ejecting action of the elastic block and providing thrust for the returning action of the elastic block.
As a further improvement of the invention, a jack is arranged in the elastic block, and the bolt is inserted in the jack; the bolt is located the upper end and is provided with first inclined plane on one side of being away from first rack, the jack is located the lower tip be provided with the second inclined plane of first inclined plane cooperation use.
As a further improvement of the invention, a second fixed block is arranged on the rear die, and two ends of the transmission gear are rotatably arranged in the second fixed block through bearings; the second fixed block is provided with a first slideway along the direction perpendicular to the mold opening and closing direction, wear-resisting plates are fixedly arranged on two sides of the first slideway, and the sliding block is slidingly matched in the first slideway.
The beneficial effects of the invention are as follows: the invention provides a large-stroke side core pulling mold structure with racks, which is not separated from a gear, wherein a transmission gear, a first rack and a second rack which are meshed with the transmission gear are arranged, the second rack is fixedly connected with a sliding block, one end of the first rack can be movably arranged in a first fixed block arranged on a front mold, a rack limiting mechanism is arranged between the front mold and a rear mold, the first rack does not act in the initial stage of mold opening, the first rack is driven to move upwards through the first fixed block after the front mold moves upwards for a safe distance relative to the rear mold, the sliding block is driven to slide along the direction perpendicular to the mold opening and closing direction for core pulling, the first rack is limited by a rack limiting mechanism during mold closing, the first rack can move synchronously along with the front mold during mold closing, and is separated from the first rack after the rest safe distance of the front mold and the rear mold closing, the first rack is ensured to be driven by the transmission of the first rack to reset, and then the second rack is completely closed, so that the first rack and the second rack are not separated from the transmission gear, the dead state of the racks is avoided, the stability of the mold is greatly improved, the volume of the mold opening and the injection molding device is also required to be driven, and the cost of an injection molding mold is shortened.
Drawings
FIG. 1 is a perspective view of a large-stroke side core-pulling mold structure of a rack without disengaging a gear;
FIG. 2 is a top view of a large-stroke side core-pulling mold structure without disengaging a rack from a gear;
FIG. 3 is a cross-sectional view of A-A in FIG. 2 showing a structure of a large-stroke side core-pulling mold without disengaging a rack gear according to the present invention;
FIG. 4 is a cross-sectional view of B-B in FIG. 2 showing a structure of a large-stroke side core-pulling mold without disengaging a rack from a gear according to the present invention;
FIG. 5 is a cross-sectional view of C-C in FIG. 2 showing a structure of a large stroke side core-pulling mold without disengaging a rack gear according to the present invention;
FIG. 6 is a first cross-sectional view of the front mold of the present invention as opened a safe distance relative to the rear mold;
fig. 7 is a second cross-sectional view of the front mold of the present invention as opened a safe distance relative to the rear mold.
The following description is made with reference to the accompanying drawings:
1. a front mold; 2. a rear mold; 3. a slide block; 4. a first rack; 401. a limit boss; 402. a limit step; 5. a second rack; 6. a transmission gear; 7. a first fixed block; 701. a travel limit cavity; 8. a first spring; 9. a spring block; 901. a jack; 902. a second inclined surface; 10. a plug pin; 1001. a first inclined surface; 11. a second spring; 12. a second fixed block; 13. wear plates.
Detailed Description
A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 to 7, the present invention provides a rack large-stroke side core-pulling mold structure without disengaging from a gear, comprising: front mould 1, back mould 2 and slider 3, front mould 1 and back mould 2 upper and lower relative arrangement are fixed with the front mould core on the front mould 1, are fixed with the back mould core on the back mould 2, and front mould core and back mould core surround and are formed with the die cavity that is used for injection moulding product. The sliding block 3 is arranged on the rear die 2 in a sliding manner, the sliding block 3 comprises a sliding block seat and a sliding block core, the sliding block core is fixed on one side of the sliding block seat, one end of the sliding block core extends into a cavity to be subjected to injection molding with a product, a back pressing plate which is obliquely arranged is arranged on the other side of the sliding block seat, and in a die closing state, an inclined pressing surface on the front die 1 just presses and adheres to the back pressing plate, the sliding block 3 is stopped and limited, and the reliability of product molding is ensured.
Referring to fig. 3 to 5, a side core pulling mechanism is provided between the front mold 1 and the rear mold 2, the side core pulling mechanism includes a first rack 4 arranged along the mold opening and closing direction, a second rack 5 arranged perpendicular to the first rack 4, and a transmission gear 6, and the axis of the transmission gear 6 is perpendicular to both the first rack 4 and the second rack 5. One side of the rear mould 2 is fixedly provided with a second fixed block 12, a rotating shaft is arranged in the transmission gear 6, and two ends of the rotating shaft are rotatably arranged in the second fixed block 12 through bearings. The second fixed block 12 is provided with a first slide along the direction perpendicular to the mold opening and closing direction, wear plates 13 are fixedly mounted on both sides and the bottom of the first slide, a sliding groove is formed between the wear plates 13 on the side and the corresponding wear plates 13 on the bottom, sliding table portions are arranged on both sides of the sliding block seat, the sliding block seat is slidably matched in the first slide, and the sliding table portions are slidably matched in the sliding grooves. The second rack 5 is positioned in the first slideway and is fixed at the bottom of the sliding block seat in parallel, and the second rack 5 is meshed with the transmission gear 6.
Wherein, one side of the second fixed block 12 close to the rear mould 2 is provided with a second slide along the vertical direction, the second slide is also fixedly provided with a wear-resisting plate 13 along the inner wall, and the first rack 4 is inserted in the second slide in a sliding way and meshed with the transmission gear 6. A first fixed block 7 is arranged on the front mould 1, which is opposite to the first rack 4, a travel limiting cavity 701 is arranged in the first fixed block 7, and the upper end of the first rack 4 is movably arranged in the travel limiting cavity 701. When the die is opened, the first rack 4 does not act in the initial stage, after the front die 1 moves upwards to open a safe distance relative to the rear die 2, the first rack 4 is driven to move upwards by the first fixed block 7, and the sliding block 3 is driven to slide along the direction perpendicular to the die opening and closing direction by the transmission of the transmission gear 6 and the second rack 5 to loose core.
It should be noted that, the above-mentioned safety distance is an initial mold opening distance designed according to the actual core-pulling length, and the core-pulling action is performed only after the front mold 1 moves this safety distance, so as to ensure that the inclined pressing surface on the front mold 1 will not interfere with the back pressure plate on the slider 3 in the subsequent mold opening process.
Wherein, first rack 4 is T style of calligraphy, and first rack 4 is located the upper end in the spacing chamber of stroke 701 and is provided with spacing boss 401 along bilateral symmetry, and spacing chamber of stroke 701 has the interior diapire just to spacing boss 401, and during the compound mode, the top of first rack 4 supports and leans on the interior roof in spacing chamber of stroke 701, and spacing and the safe distance between spacing boss 401 of interior diapire in spacing chamber of stroke 701 are unanimous. In addition, the top of the stroke limiting cavity 701 is provided with a first accommodating groove, a first spring 8 is installed in the first accommodating groove, the lower end of the first spring 8 is elastically propped against the top of the first rack 4, the first rack 4 is always provided with an elastic force opposite to the die opening direction, and the first rack 4 is under the action of the elastic force, so that the front die 1 can not drive the first rack 4 to move along with the process of opening the safety distance.
Referring to fig. 4 and 7, a rack limiting mechanism is further disposed between the front mold 1 and the rear mold 2, and the rack limiting mechanism is used for limiting the first rack 4, so that the first rack 4 can move synchronously along with the front mold 1 during mold assembly, and is separated from the first rack 4 after the front mold 1 and the rear mold 2 are assembled by a residual safety distance, and the first rack 4 is ensured to drive the sliding block 3 to reset firstly through the transmission of the transmission gear 6 and the second rack 5, and then the mold is completely assembled.
Specifically, the rack limiting mechanism comprises a spring block 9, a bolt 10 and a second spring 11, wherein a second accommodating groove is formed in one side, right to the first fixed block 7, of the front die 1, and the spring block 9 is accommodated in the second accommodating groove and is located on one side of the first rack 4. The second spring 11 is also accommodated in the second accommodating groove, one end of the second spring 11 is elastically propped against one side of the elastic block 9, which is opposite to the first rack 4, and the elastic force of the second spring 11 acting on the elastic block 9 can drive the elastic block 9 to move towards the first rack 4. A limiting step 402 is concavely arranged on one side of the first rack 4 facing the elastic block 9, when the front die 1 is opened for a safe distance relative to the rear die 2, the elastic block 9 is ejected out under the elastic force of the second spring 11, so that the outer side end of the elastic block protrudes out of the second accommodating groove and is stopped on the limiting step 402; when the front die 1 is clamped relative to the rear die 2 by the residual safety distance, the elastic block 9 returns to the second accommodating groove and is separated from the limiting step 402.
The bolt 10 is fixed on the rear die 2 and is used for avoiding the ejecting action of the elastic block 9 and providing thrust for the returning action of the elastic block 9. Specifically, a jack 901 is arranged in the elastic block 9, a plug 10 is inserted in the jack 901, a first inclined surface 1001 is arranged on one side of the plug 10, which is located at the upper end and is opposite to the first rack 4, and a second inclined surface 902 matched with the first inclined surface 1001 is arranged on one side of the jack 901, which is located at the lower end.
The working procedure of this embodiment is as follows:
in the mold clamping state, the outer side surface of the spring 9 is located just below the limit step 402 of the first rack 4. When the front mould 1 synchronously drives the first fixed block 7 and the elastic block 9 to move upwards, the first rack 4 is kept motionless under the action of the elastic force of the first spring 8 until the front mould 1 is opened to a safe distance (as shown in a state shown in fig. 6), at the moment, the elastic block 9 moves to the upper end of the bolt 10, a second inclined plane 902 of the elastic block 9 is attached to a first inclined plane 1001 of the bolt 10, the elastic block 9 slides along the first inclined plane 1001 to protrude out of the second accommodating groove and is stopped on the limiting step 402 under the action of the elastic force of the second spring 11 (as shown in the state shown in fig. 7), and meanwhile, the limiting boss 401 of the first rack 4 is stopped at the inner bottom wall of the stroke limiting cavity 701; then the front mould 1 drives the first rack 4 to synchronously move upwards, and the first rack 4 drives the sliding block 3 to slide outwards along the direction perpendicular to the mould opening and closing direction through the transmission of the transmission gear 6 and the second rack 5 to loose core.
When the die is closed, the front die 1 drives the first fixed block 7, the elastic block 9 and the first rack 4 to synchronously move downwards, and the first rack 4 drives the sliding block 3 to slide inwards along the direction vertical to the die opening and closing direction through the transmission of the transmission gear 6 and the second rack 5 so as to reset; after the front die 1 is clamped relative to the rear die 2 by a residual safety distance, the sliding block 3 is reset to a position and does not advance any more, and the first rack 4 is limited to stop moving through the second rack 5 and the transmission gear 6; in this process, the upper end of the latch 10 is already inserted into the insertion hole 901 of the spring block 9, and the first inclined surface 1001 of the latch 10 is attached to the second inclined surface 902 of the spring block 9, the front mold 1 drives the spring block 9 to move downward, and the latch 10 pushes the spring block 9 to move laterally back into the second accommodating groove and separate from the limit step 402, and then the front mold 1 drives the first fixing block 7 and the spring block 9 to move downward for the rest of the safety distance, so that the upper end of the first rack 4 slides relatively in the stroke limit cavity 701 and compresses the first spring 8 until reaching the complete mold closing state.
Therefore, by adopting the technical scheme, the core pulling driving device is not required to be used independently, the core pulling action of the sliding block 3 is realized through the linkage side core pulling mechanism of the front die 1, the structural design is reasonable and ingenious, the first rack 4 and the second rack 5 are not separated from the transmission gear 6, the clamping condition of the gear and the rack is avoided, the stability of the die opening and closing action of the die is greatly improved, the die volume is also reduced, the die cost is saved, and the injection molding period of a product is shortened.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The foregoing description is only of a preferred embodiment of the invention, which can be practiced in many other ways than as described herein, so that the invention is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention without departing from the technical solution of the present invention still falls within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a rack does not break away from gear large stroke side mould structure of loosing core, includes front mould (1), back mould (2) and slider (3), front mould (1) with back mould (2) set up relatively and form the die cavity that is used for injection moulding product between it, slider (3) slip sets up on back mould (2) and its one end stretches into in the die cavity, its characterized in that: a side core pulling mechanism is arranged between the front die (1) and the rear die (2), the side core pulling mechanism comprises a first rack (4) arranged along the die opening and closing direction, a second rack (5) arranged perpendicular to the first rack (4) and a transmission gear (6), and the second rack (5) is fixed on the sliding block (3) and meshed with the transmission gear (6); a first fixed block (7) is arranged on the front die (1), a travel limiting cavity (701) is arranged in the first fixed block (7), the first rack (4) is meshed with the transmission gear (6), and one end of the first rack is movably arranged in the travel limiting cavity (701); when the front die (1) is opened by a safe distance relative to the rear die (2), the first rack (4) is driven to move along by the first fixed block (7), and the sliding block (3) is driven to slide along the direction perpendicular to the die opening and closing direction by the transmission of the transmission gear (6) and the second rack (5) for core pulling;
a rack limiting mechanism is arranged between the front die (1) and the rear die (2), and is used for limiting the first rack (4), so that the first rack (4) can synchronously move along with the front die (1) during die assembly, and is separated from the first rack (4) after the front die (1) and the rear die (2) are clamped for the rest of the safe distance;
the rack limiting mechanism comprises a spring block (9), wherein the spring block (9) is accommodated in a second accommodating groove formed in the front die (1) and is positioned at one side of the first rack (4), and a limiting step (402) is arranged at one side of the first rack (4) facing the spring block (9); when the front die (1) is opened for the safety distance relative to the rear die (2), the elastic block (9) is ejected to enable one end of the elastic block to protrude out of the second accommodating groove and stop on the limiting step (402); when the front die (1) is clamped relative to the rear die (2) and the safety distance is remained, the elastic block (9) returns to the second accommodating groove and is separated from the limiting step (402).
2. The rack bar non-disengaging gear large stroke side core pulling die structure according to claim 1, wherein: a first spring (8) is arranged in the stroke limiting cavity (701), one end of the first spring (8) is elastically propped against the first rack (4), and the first rack (4) is always provided with elastic force opposite to the die opening direction.
3. The rack bar non-disengaging gear large stroke side core pulling die structure according to claim 1, wherein: one end of the first rack (4) located in the stroke limiting cavity (701) is provided with a limiting boss (401), the stroke limiting cavity (701) is provided with an inner bottom wall right opposite to the limiting boss (401), and the distance between the inner bottom wall and the limiting boss (401) is consistent with the safety distance.
4. The rack bar non-disengaging gear large stroke side core pulling die structure according to claim 1, wherein: the rack limiting mechanism further comprises a bolt (10) and a second spring (11), the second spring (11) is accommodated in the second accommodating groove, and the elastic force acting on the elastic block (9) can drive the elastic block (9) to move towards the first rack (4); the bolt (10) is fixed on the rear die (2) and is used for avoiding the ejecting action of the elastic block (9) and providing thrust for the returning action of the elastic block (9).
5. The rack bar non-disengaging gear large stroke side core pulling die structure according to claim 4, wherein: a jack (901) is arranged in the elastic block (9), and the bolt (10) is inserted into the jack (901); the plug pin (10) is located at the upper end portion and is provided with a first inclined surface (1001) on one side, opposite to the first rack (4), of the plug pin, the plug hole (901) is located at the lower end portion and is provided with a second inclined surface (902) matched with the first inclined surface (1001).
6. The rack bar non-disengaging gear large stroke side core pulling die structure according to claim 1, wherein: a second fixed block (12) is arranged on the rear die (2), and two ends of the transmission gear (6) are rotatably arranged in the second fixed block (12) through bearings; the second fixing block (12) is provided with a first slide way along the direction perpendicular to the opening and closing die, wear-resisting plates (13) are fixedly arranged on two sides of the first slide way, and the sliding block (3) is slidingly matched in the first slide way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210678836.1A CN114851486B (en) | 2022-06-15 | 2022-06-15 | Large-stroke side core-pulling die structure with rack not separated from gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210678836.1A CN114851486B (en) | 2022-06-15 | 2022-06-15 | Large-stroke side core-pulling die structure with rack not separated from gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114851486A CN114851486A (en) | 2022-08-05 |
| CN114851486B true CN114851486B (en) | 2023-09-05 |
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| CN202210678836.1A Active CN114851486B (en) | 2022-06-15 | 2022-06-15 | Large-stroke side core-pulling die structure with rack not separated from gear |
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| CN205889762U (en) * | 2016-06-27 | 2017-01-18 | 宁波誉立精密模具有限公司 | Plastic mold's rack fixed knot constructs |
| CN207415892U (en) * | 2017-11-20 | 2018-05-29 | 东莞市欧若拉精密塑料制品有限公司 | Arc-shaped core pulling mechanism and mold |
| CN108527784A (en) * | 2018-04-25 | 2018-09-14 | 昆山金莓电子有限公司 | Big stroke pulled core structure and injection mold |
| CN209580405U (en) * | 2019-01-21 | 2019-11-05 | 上海肇民新材料科技股份有限公司 | A kind of gear set side core-pulling structure |
| CN109702971A (en) * | 2019-03-07 | 2019-05-03 | 无锡模达科技有限公司 | A kind of valve body and its mold of oil tank valve |
| CN210880688U (en) * | 2019-10-08 | 2020-06-30 | 厦门市松竹精密科技有限公司 | Long core-pulling sliding block gear driving mechanism on injection mold |
| CN111300758A (en) * | 2020-03-20 | 2020-06-19 | 广东博智林智能制造有限公司 | Screw thread core-pulling mechanism and injection mold |
| CN215921152U (en) * | 2021-09-30 | 2022-03-01 | 武汉市东亚合成汽车部件有限公司 | Fixed starting point screw thread core pulling structure and automobile injection molding part mold |
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