CN108673841B - Anti-deformation lateral core-pulling injection mold - Google Patents
Anti-deformation lateral core-pulling injection mold Download PDFInfo
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- CN108673841B CN108673841B CN201810476647.XA CN201810476647A CN108673841B CN 108673841 B CN108673841 B CN 108673841B CN 201810476647 A CN201810476647 A CN 201810476647A CN 108673841 B CN108673841 B CN 108673841B
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- side core
- pulling
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- 238000002347 injection Methods 0.000 title claims abstract description 19
- 239000007924 injection Substances 0.000 title claims abstract description 19
- 238000001746 injection moulding Methods 0.000 claims abstract description 34
- 238000005336 cracking Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 239000012768 molten material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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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
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides an anti-deformation lateral core-pulling injection mold which comprises a side core-pulling module and a side core-pulling module, wherein the side core-pulling module comprises a sliding block; a cylindrical side core is arranged on one side, opposite to the cavity, of the sliding block, a sliding hole is formed in the side ring surface of the side core, a telescopic piece is assembled in the sliding hole in a sliding mode, an exhaust groove is formed in the telescopic piece, limiting plates are arranged at the outer side and the inner side of the telescopic piece, and a reset spring is arranged between the limiting plate on the inner side and the inner side surface of the side core; an exhaust hole is formed in the sliding block; the deformation-preventing lateral core-pulling injection mold can perform shrinkage compensation on an injection molding piece, and avoids the cracking phenomenon of the injection molding piece due to internal stress; in addition, can separate with the injection molding when the drawing of patterns, avoided the device of the phenomenon that side core and injection molding take place frictional damage.
Description
Technical Field
The invention relates to the field of injection molds, in particular to a side core-pulling injection mold.
Background
The injection mold is a common mold for injection molding of plastic parts, and plastic parts with various forms can be molded through the injection mold. When the injection molding part is provided with holes or convex-concave parts in the direction different from the demolding direction, the side core-pulling mechanism is needed to perform side pulling and ejection actions on a molded product by means of the side core-pulling mechanism in the mold opening process, so that the purpose of forming the holes or grooves and other structures on the injection molding part is achieved. When the mould cools off the shaping, need to cool down the processing to the mould, the side mechanism of loosing core also needs to cool down thereupon simultaneously, because the side core is in the inside of mould cavity, consequently can appear during the drawing of patterns the phenomenon that takes place frictional deformation because of frictional force is too big between side core and the solution of moulding plastics, causes the injection molding damage. In addition, when the side core is cooled, the cooling speed is low because the side core is in the die cavity, so that the whole injection molding time can be prolonged, and the injection molding efficiency is not improved. In addition, the existing injection mold has the phenomenon of material shrinkage during cooling molding, and the phenomenon can cause the cracking phenomenon of the material due to internal stress, and the existing side core-pulling injection mold has no method for solving the problems. In summary, there are drawbacks.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the anti-deformation lateral core-pulling injection mold which can perform shrinkage compensation on an injection molding piece and avoid the cracking phenomenon of the injection molding piece due to internal stress; in addition, the side core can be separated from the injection molding part during demolding, and the phenomenon that the side core is damaged by friction with the injection molding part is avoided.
The technical scheme adopted by the invention for solving the technical problem is as follows: the anti-deformation lateral core-pulling injection mold comprises a lateral core-pulling module; the side core-pulling module is assembled on the fixed die module in a sliding manner, one side of the side core-pulling module is provided with a resetting device matched with the side core-pulling module, the other side of the side core-pulling module is provided with a cavity fixedly arranged on the fixed die module, and the cavity is provided with a side core-pulling hole; a movable die module is arranged right above the fixed die module, a pouring gate is arranged on the movable die module, the movable die module comprises an inclined pin, and the inclined pin is arranged above the side core-pulling module; the side core pulling module comprises a sliding block, and an inclined pin hole matched with the inclined pin is formed in the sliding block; a cylindrical side core is arranged on one side, opposite to the cavity, of the sliding block, the inside of the side core is hollow, a sliding hole is formed in the side ring surface of the side core, an extensible member is assembled in the sliding hole in a sliding mode, an exhaust groove is formed in the extensible member, limiting plates are arranged at the outer side and the inner side of the extensible member, and a reset spring is arranged between the limiting plates on the inner side and the inner side surface of the side core; and an exhaust hole is formed in the sliding block, one end of the exhaust hole is hermetically connected with the gas transmission device, and the other end of the exhaust hole is communicated with the hollow part in the side core.
Preferably, the exhaust hole in the sliding block comprises a piston, the piston comprises a piston groove, the piston groove is vertically communicated with the exhaust hole, the piston is assembled in the piston groove in a sliding mode, the piston groove comprises an air pressure chamber, expansion and contraction gas is filled in the air pressure chamber, and the air pressure chamber is communicated with the piston groove.
Preferably, the slide holes on the side core and the telescopic pieces are more than two groups and symmetrically distributed, the limiting plate is an arc-shaped plate, and the radian of the limiting plate is consistent with that of the side ring surface of the side core.
Preferably, the sliding hole in the side core is a stepped hole, the outer side of the stepped hole is a large hole, the inner side of the stepped hole is a small hole, and the shape of the large hole is consistent with that of the limiting plate.
The invention has the beneficial effects that: when the anti-deformation lateral core-pulling injection mold is used, the movable mold module slides to one side of the fixed mold module, and the inclined pin holes are formed in the sliding blocks, so that the side core-pulling module slides to one side of the cavity under the action of the inclined pins, and when the movable mold module and the fixed mold module are completely closed, the side core part of the side core-pulling module enters the cavity, and the injection molding operation can be started. After the cavity is filled with the injection-molded dissolved material, cooling molding operation is carried out, the whole mold is cooled through a cooling device, in the process, the dissolved material in the cavity is cooled and molded, the dissolved material can shrink when being cooled, at the moment, a gas transmission device is opened, gas enters the side mold core through the exhaust hole and jacks up the telescopic piece under the action of air pressure, so that the telescopic piece can compensate the cooling shrinkage of the dissolved material, and the cracking phenomenon of the dissolved material due to internal stress during the cooling shrinkage is avoided; in addition, the gas delivered by the gas delivery device is low-temperature gas, so that the cooling forming speed can be increased, the time required by cooling is shortened, and the cooling forming efficiency is improved.
When carrying out the drawing of patterns operation, close gas transmission device, the extensible member is in reset under reset spring's the effect, the medial surface of injection molding side opening this moment with the extensible member separation, thereby avoided the side core is when the drawing of patterns to the side opening of injection molding because of the phenomenon that frictional force is too big and cause the damage. When the movable mold module is separated from the fixed mold module, the side core-pulling module is reset under the action of the angle pin and the resetting device, and a user can take out an injection molding piece to complete the demolding operation.
Drawings
Fig. 1 is a front view of the deformation-preventing lateral core-pulling injection mold of the invention.
Fig. 2 is a front view of a side core module during injection molding of the deformation-preventing side core-pulling injection mold of the present invention.
Fig. 3 is a front view of a side core module when the deformation-preventing side core-pulling injection mold of the present invention is molded.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
as shown in the embodiment in fig. 1, 2 and 3, the deformation-preventing lateral core-pulling injection mold can perform shrinkage compensation on an injection molding part, so as to avoid cracking caused by internal stress; in addition, the device can be separated from the injection molding piece during demolding, so that the phenomenon of friction damage between a side core and the injection molding piece is avoided, and the device comprises a side core-pulling module 1; the side core-pulling module 1 is assembled on the fixed die module 2 in a sliding manner, one side of the side core-pulling module 1 is provided with a resetting device matched with the side core-pulling module, the other side of the side core-pulling module 1 is provided with a cavity 21 fixedly arranged on the fixed die module 2, and the cavity 21 is provided with a side core-pulling hole; a movable die module 3 is arranged right above the fixed die module 2, a pouring gate is arranged on the movable die module 3, the movable die module 3 comprises an inclined pin, and the inclined pin 31 is arranged above the side core-pulling module 1; the side core-pulling module 1 comprises a slide block 10, and the slide block 10 is provided with an inclined pin hole matched with the inclined pin 31; a cylindrical side core 11 is arranged on one side, opposite to the cavity 21, of the slider 10, the inside of the side core 11 is hollow, a sliding hole is formed in the side ring surface of the side core 11, an expansion piece 12 is assembled in the sliding hole in a sliding mode, an exhaust groove is formed in the expansion piece 12, limiting plates 13 are arranged at the outer side and the inner side of the expansion piece 12, and a return spring 14 is arranged between the limiting plate 13 on the inner side and the inner side surface of the side core 11; an exhaust hole 15 is formed in the slider 10, one end of the exhaust hole 15 is connected with the gas transmission device in a sealing mode, and the other end of the exhaust hole 15 is communicated with the inside of the side mold core 11 in a hollow mode.
When the anti-deformation lateral core-pulling injection mold is used, the movable mold module 3 slides to one side of the fixed mold module 2, the slide block 10 is provided with the inclined pin hole, so that under the action of the inclined pin 31, the side core-pulling module 1 slides to one side of the cavity 21, when the movable mold module 3 and the fixed mold module 2 are completely closed, the side core 11 part of the side core-pulling module 1 enters the cavity 21, and then injection molding operation can be started. After the cavity 21 is filled with the injection-molding molten material, cooling and forming operation is started, the whole mold is cooled through a cooling device, in the process, the molten material in the cavity 21 is cooled and formed, the molten material can shrink when being cooled, at the moment, a gas transmission device is opened, gas enters the side mold core 11 through the exhaust hole 15, and the expansion part 12 is jacked up under the action of air pressure, so that the expansion part 12 can compensate the cooling shrinkage of the molten material, and the phenomenon that the molten material cracks due to internal stress when being cooled and shrunk is avoided; in addition, the gas delivered by the gas delivery device is low-temperature gas, so that the cooling forming speed can be increased, the time required by cooling is shortened, and the cooling forming efficiency is improved.
When the demoulding operation is carried out, the gas transmission device is closed, the telescopic part 12 is reset under the action of the reset spring 14, and the inner side surface of the side hole of the injection molding part is separated from the telescopic part 12, so that the phenomenon that the side core 11 damages the side hole of the injection molding part due to overlarge friction force during demoulding is avoided. When the movable mold module 3 is separated from the fixed mold module 2, the side core-pulling module 1 is reset under the action of the taper pin 31 and the reset device, and a user can take out an injection molding part to complete the demolding operation.
As shown in fig. 2 and 3, the exhaust hole 15 in the slider 10 includes a piston 16, the piston 16 includes a piston 16 groove, the piston 16 groove is vertically communicated with the exhaust hole 15, the piston 16 is slidably assembled in the piston 16 groove, the piston 16 groove includes an air pressure chamber 17, the air pressure chamber 17 is filled with expansion and contraction gas, and the air pressure chamber 17 is communicated with the piston 16 groove. When the temperature of the mold is raised, the air pressure in the air pressure chamber 17 is increased, the piston 16 is ejected out of the groove of the piston 16, so that the piston 16 closes the exhaust hole 15, the air conveying device is closed at the moment, and the molten material is prevented from entering the inner part of the side core 11 when being injected; when the mold is cooled and molded, the air pressure of the air pressure chamber 17 is small, the piston 16 retracts into the piston 16 groove, the air device is opened at the moment, the telescopic piece 12 is determined by the air pressure, the contraction of the dissolved material during cooling can be well matched, and the effect of timely performing contraction compensation is achieved.
As shown in fig. 2 and 3, the slide holes on the side core 11 and the expansion pieces 12 are provided with more than two sets and are symmetrically distributed, the limiting plates 13 are arc-shaped plates, and the radian of the limiting plates 13 is consistent with that of the side ring surface of the side core 11. The effect of shrinkage compensation of the telescopic part 12 is enhanced, and meanwhile, the side holes of the molded injection molding part can be uniform and easy to process.
As shown in fig. 2 and 3, the sliding hole in the side core is a stepped hole, the outer side of the stepped hole is a large hole, the inner side of the stepped hole is a small hole, and the shape of the large hole is consistent with the shape of the limiting plate 13. The limiting plate 13 can fall into the sliding hole and is flush with the side annular surface of the side core 11, so that the side core-pulling operation is facilitated, and defects on injection molding parts can be avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the invention are therefore intended to be embraced therein.
Claims (1)
1. An anti-deformation lateral core-pulling injection mold comprises a lateral core-pulling module (1); the side core-pulling module (1) is assembled on the fixed die module (2) in a sliding mode, one side of the side core-pulling module (1) is provided with a resetting device matched with the side core-pulling module, the other side of the side core-pulling module is provided with a die cavity (21) fixedly installed on the fixed die module (2), and a side core-pulling hole is formed in the die cavity (21); be provided with movable mould module (3) directly over cover half module (2), be provided with the sprue gate on movable mould module (3), movable mould module (3) include the taper pin, taper pin (31) set up the top of side core-pulling module (1), its characterized in that: the side core-pulling module (1) comprises a sliding block (10), and the sliding block (10) is provided with an inclined pin hole matched with the inclined pin (31); a cylindrical side core (11) is arranged on one side, opposite to the cavity (21), of the sliding block (10), the inside of the side core (11) is hollow, a sliding hole is formed in the side ring surface of the side core (11), an expansion piece (12) is assembled in the sliding hole in a sliding mode, an exhaust groove is formed in the expansion piece (12), limiting plates (13) are arranged at the outer side and the inner side of the expansion piece (12), and a reset spring (14) is arranged between the limiting plate (13) on the inner side and the inner side surface of the side core (11); an exhaust hole (15) is formed in the sliding block (10), one end of the exhaust hole (15) is hermetically connected with the gas transmission device, and the other end of the exhaust hole is communicated with the inside of the side mold core (11) in a hollow mode;
the exhaust hole (15) in the sliding block (10) comprises a piston (16), the piston (16) comprises a piston (16) groove, the piston (16) groove is vertically communicated with the exhaust hole (15), the piston (16) is assembled in the piston (16) groove in a sliding mode, the piston (16) groove comprises an air pressure chamber (17), the air pressure chamber (17) is filled with expansion and contraction gas, and the air pressure chamber (17) is communicated with the piston (16) groove;
more than two groups of sliding holes in the side mold core (11) and the telescopic pieces (12) are symmetrically distributed, the limiting plates (13) are arc-shaped plates, and the radian of the limiting plates (13) is consistent with that of the side mold core (11) side ring surface;
the sliding hole in the side core is a step hole, the outer side of the step hole is a large hole, the inner side of the step hole is a small hole, and the shape of the large hole is consistent with that of the limiting plate (13);
when the injection molding device is used, the movable mold module slides to one side of the fixed mold module, the side core-pulling module slides to one side of the cavity under the action of the inclined pin because the slide block is provided with the inclined pin hole, and when the movable mold module and the fixed mold module are completely closed, the side core part of the side core-pulling module enters the cavity, so that the injection molding operation can be started; after the cavity is filled with the injection-molded dissolved material, cooling molding operation is carried out, the whole mold is cooled through a cooling device, in the process, the dissolved material in the cavity is cooled and molded, the dissolved material can shrink when being cooled, at the moment, a gas transmission device is opened, gas enters the side mold core through the exhaust hole and jacks up the telescopic piece under the action of air pressure, so that the telescopic piece can compensate the cooling shrinkage of the dissolved material, and the cracking phenomenon of the dissolved material due to internal stress during the cooling shrinkage is avoided; in addition, the gas delivered by the gas delivery device is low-temperature gas, so that the cooling forming speed can be increased, the time required by cooling is shortened, and the cooling forming efficiency is improved;
when demoulding operation is carried out, the gas transmission device is closed, the telescopic piece is reset under the action of the reset spring, and the inner side surface of the side hole of the injection molding piece is separated from the telescopic piece, so that the phenomenon that the side hole of the injection molding piece is damaged due to overlarge friction force when the side core is demoulded is avoided; when the movable mold module is separated from the fixed mold module, the side core-pulling module is reset under the action of the angle pin and the resetting device, and a user can take out an injection molding piece to complete the demolding operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810476647.XA CN108673841B (en) | 2018-05-18 | 2018-05-18 | Anti-deformation lateral core-pulling injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810476647.XA CN108673841B (en) | 2018-05-18 | 2018-05-18 | Anti-deformation lateral core-pulling injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108673841A CN108673841A (en) | 2018-10-19 |
| CN108673841B true CN108673841B (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810476647.XA Active CN108673841B (en) | 2018-05-18 | 2018-05-18 | Anti-deformation lateral core-pulling injection mold |
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| CN (1) | CN108673841B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111361099A (en) * | 2020-04-16 | 2020-07-03 | 佛山市南海华达高木模具有限公司 | Shrinkage compensation slider structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206030448U (en) * | 2016-09-13 | 2017-03-22 | 台州市黄岩恒大塑胶有限公司 | Luxuriant mould is enclosed in garden |
| CN206678328U (en) * | 2017-03-22 | 2017-11-28 | 台州市卓信塑业有限公司 | A kind of injection mold |
-
2018
- 2018-05-18 CN CN201810476647.XA patent/CN108673841B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206030448U (en) * | 2016-09-13 | 2017-03-22 | 台州市黄岩恒大塑胶有限公司 | Luxuriant mould is enclosed in garden |
| CN206678328U (en) * | 2017-03-22 | 2017-11-28 | 台州市卓信塑业有限公司 | A kind of injection mold |
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| Publication number | Publication date |
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| CN108673841A (en) | 2018-10-19 |
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Address after: 518106 101, building B, Zone C, Shiwei datianyang Industrial Zone, Shiwei community, Matian street, Guangming District, Shenzhen, Guangdong Patentee after: Shenzhen yifengte Technology Co.,Ltd. Address before: 518101 floor 1, No. 6, Minsheng 4th Road, liaokeng, Baoyuan community, Langxin community, Shiyan street, Bao'an District, Shenzhen, Guangdong Patentee before: Shenzhen yifengte Mould Plastic Co., Ltd |
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