CN115230096A - Core pulling mechanism and core pulling method for injection mold - Google Patents
Core pulling mechanism and core pulling method for injection mold Download PDFInfo
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- CN115230096A CN115230096A CN202211063564.0A CN202211063564A CN115230096A CN 115230096 A CN115230096 A CN 115230096A CN 202211063564 A CN202211063564 A CN 202211063564A CN 115230096 A CN115230096 A CN 115230096A
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- core
- rod
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- hole
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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
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/58—Applying the releasing agents
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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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/66—Mould opening, closing or clamping devices mechanical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a core-pulling mechanism and a core-pulling method for an injection mold, wherein the core-pulling mechanism for the injection mold comprises a core bar, a strip-shaped cavity is formed in a lower mold, a through hole communicated with the mold cavity is formed in the inner wall of one side, close to the mold cavity, of the strip-shaped cavity, a fixed rod is sleeved on a loop bar in a sliding manner, the fixed rod is fixedly arranged in the strip-shaped cavity, and a spring used for resetting the loop bar is sleeved on the fixed rod; the top side of the strip-shaped cavity is provided with a groove, the top side of the lower die is provided with a positioning hole communicated with the groove, and the bottom side of the lower die is provided with a positioning rod matched with the positioning hole. According to the invention, the core rod is automatically sprayed with the release agent, the core insert and the core pulling in the processes of die assembly and die stripping through the linkage mechanism, so that the three processes of core insert spraying, release agent spraying and core pulling are automatically completed in the processes of die assembly and die stripping, manual independent operation is not required, and the production efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of injection molds, and particularly relates to a core pulling mechanism and a core pulling method for an injection mold.
Background
When some injection products are designed, holes, grooves and the like need to be reserved on the surface or the inner wall, corresponding core rods are arranged in the injection mold to enable the holes and the grooves to be formed, and the core rods are drawn out firstly during demolding, so that the demolding of the products is not influenced.
The core inserting, core pulling and mold release agent spraying of the existing core pulling structure are independent processes, the core inserting is needed before injection molding, then the mold release agent is sprayed on a core rod, the core pulling is carried out after injection molding cooling molding, the core pulling is needed to be completed manually independently, and the work efficiency is greatly reduced.
Therefore, it is necessary to provide a new core pulling mechanism and a new core pulling method for injection molds to solve the above technical problems.
Disclosure of Invention
The present invention is directed to solving the above problems and to providing a core pulling mechanism and a core pulling method for an injection mold.
The invention realizes the purpose through the following technical scheme:
a core-pulling mechanism for an injection mold is arranged in the injection mold and comprises a lower mold and an upper mold, wherein a mold cavity is formed in the lower mold, an upper mold core is arranged on the upper mold, the core-pulling mechanism comprises a core bar, the core bar comprises a loop bar, a hole-making rod with the diameter smaller than that of the loop bar is arranged at one end, close to the upper mold core, of the loop bar, and a circular truncated cone is arranged between the hole-making rod and the loop bar; the lower die is provided with a strip-shaped cavity, the inner wall of one side of the strip-shaped cavity, which is close to the model cavity, is provided with a through hole communicated with the model cavity, the loop bar is sleeved with a fixed rod in a sliding manner, the fixed rod is fixedly arranged in the strip-shaped cavity, and the fixed rod is sleeved with a spring for resetting the loop bar; the circular truncated cone is in sealed contact with the junction of the strip-shaped cavity and the through hole, and the hole forming rod penetrates through the through hole;
a groove is formed in the top side of the strip-shaped cavity, a positioning hole communicated with the groove is formed in the top side of the lower die, and a positioning rod matched with the positioning hole is arranged at the bottom side of the lower die; and a linkage structure which drives the core rod to move towards the direction close to the upper die core in the process that the positioning rod moves downwards is arranged in the groove.
As a further optimized scheme of the invention, the linkage structure comprises a wedge-shaped block which is arranged on the top side of the core rod and extends into the groove, and further comprises an extrusion assembly which is slidably mounted on the inner wall of one side of the groove and is used for extruding the wedge-shaped block, wherein the extrusion assembly is in contact with the positioning rod.
As a further optimized scheme of the invention, the extrusion assembly comprises a mounting seat, wherein a roller is rotatably mounted on the mounting seat, and the roller is in contact with the wedge-shaped block; the installation block is provided with a bearing seat, and the bearing seat is in contact with the positioning rod.
As a further optimization scheme of the invention, a sliding rail is arranged on the inner wall of one side of the groove, and a sliding block is arranged on the mounting block and is connected with the sliding rail in a sliding manner.
As a further optimization scheme of the invention, the core-pulling mechanism further comprises a release agent spraying structure, and the release agent spraying structure is used for automatically spraying release agent on the hole-making rod in the process that the hole-making rod slides into the model cavity.
As a further optimization scheme of the invention, the mold release agent spraying structure comprises a plurality of spray heads, a plurality of placing grooves are formed in the inner wall of the strip-shaped cavity, the spray heads are arranged in the placing grooves, an annular cavity is formed in the lower mold based on the strip-shaped cavity as the center of circle, a plurality of connecting holes are formed in the inner wall of the annular cavity and communicated with the spray heads in the placing grooves, a feeding hole communicated with the annular cavity is formed in the top side of the lower mold, a pressurizing rod matched with the feeding hole is arranged at the bottom side of the upper mold, and a piston is sleeved on the pressurizing rod.
As a further optimization scheme of the invention, the number of the spray heads is at least three, and the spray heads are uniformly arranged on the basis of the annular strip-shaped cavity.
A core pulling method for an injection mold comprises the following steps:
s1: filling the annular cavity with a release agent through the feeding hole;
s2: aligning the positioning rod and the extrusion rod with the positioning hole and the feeding hole respectively, matching an upper die with the lower die, extruding a release agent and uniformly spraying the release agent on the sliding hole forming rod through the spray head, and extruding the wedge block to drive the hole forming rod to slide into the die cavity;
s3: injecting molten raw materials into the mould cavity, and cooling and forming;
s4: and moving the upper die upwards to perform die stripping, and contracting the hole forming rod into the strip-shaped cavity under the action of the spring to realize core pulling.
The invention has the beneficial effects that:
according to the invention, the core rod is automatically sprayed with the release agent, the core insert and the core pulling in the processes of die assembly and stripping through the linkage mechanism, so that the three processes of the core insert, the release agent spraying and the core pulling are automatically completed in the processes of die assembly and stripping, manual independent operation is not required, and the production efficiency is greatly improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of part A of the present invention;
FIG. 3 is a schematic view of the structure of part B of the present invention;
FIG. 4 is a schematic structural view of a core rod of the present invention;
fig. 5 is a partial side cross-sectional structural schematic view of the lower mold of the present invention.
In the figure: 1. a lower die; 2. an upper die; 3. a mold cavity; 4. an upper mold core; 5. a strip-shaped cavity; 6. a strip-shaped cavity; 7. a core bar; 71. a loop bar; 72. a circular table; 73. a hole making rod; 8. fixing the rod; 9. a spring; 10. a groove; 11. a wedge block; 12. mounting blocks; 13. a roller; 14. a pressure bearing seat; 15. a slide rail; 16. a slide rail; 17. positioning holes; 18. positioning a rod; 19. a placement groove; 20. a spray head; 21. an annular cavity; 22. connecting holes; 23. a feed aperture; 24. a pressurizing rod; 25. a piston.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1-5, a core pulling mechanism for an injection mold is arranged in the injection mold, the injection mold includes a lower mold 1 and an upper mold 2, a mold cavity 3 is arranged on the lower mold 1, an upper mold core 4 is arranged on the upper mold 2, the core pulling mechanism includes a core rod 7, the core rod 7 includes a loop bar 71, a hole forming rod 73 with a diameter smaller than that of the loop bar 71 is arranged at one end of the loop bar 71 close to the upper mold core 4, and a circular truncated cone 72 is arranged between the hole forming rod 73 and the loop bar 71; a strip-shaped cavity 5 is formed in the lower die 1, a through hole 6 communicated with the die cavity 3 is formed in the inner wall of one side, close to the die cavity 3, of the strip-shaped cavity 5, a fixing rod 8 is slidably sleeved on the sleeve rod 71, the fixing rod 8 is fixedly installed in the strip-shaped cavity 5, and a spring 9 used for resetting the sleeve rod 71 is sleeved on the fixing rod 8; the circular truncated cone 72 is in sealing contact with the junction of the strip-shaped cavity 5 and the through hole 6, so that flash is prevented from being generated, and the hole forming rod 73 penetrates through the through hole 6;
a groove 10 is formed in the top side of the strip-shaped cavity 5, a positioning hole 17 communicated with the groove 10 is formed in the top side of the lower die 4, and a positioning rod 18 matched with the positioning hole 17 is arranged at the bottom side of the lower die 4; a linkage structure which drives the core bar 7 to move towards the direction close to the upper mold core 4 in the process that the positioning rod 18 moves downwards is arranged in the groove 10, the linkage structure comprises a wedge-shaped block 11 which is arranged on the top side of the core bar 7 and extends into the groove 10, and an extrusion assembly which is slidably mounted on the inner wall of one side of the groove 10 and is used for extruding the wedge-shaped block 11, the extrusion assembly is in contact with the positioning rod 18, the extrusion assembly comprises a mounting seat 12, a roller 13 is rotatably mounted on the mounting seat 12, the roller 13 is in contact with the inclined surface of the wedge-shaped block 11, a slide rail 15 is arranged on the inner wall of one side of the groove 10, a slide block 16 is arranged on the mounting block 12, and the slide block 16 is in sliding connection with the slide rail 15; the mounting block 12 is provided with a bearing seat 14, and the bearing seat 14 is in contact with the positioning rod 18.
The core-pulling mechanism further comprises a release agent spraying structure for automatically spraying a release agent to the boring bar 73 in the process of sliding the boring bar 73 into the mold cavity 3.
The release agent spraying structure comprises a plurality of spray heads 20, a plurality of placing grooves 19 are formed in the inner wall of a strip-shaped cavity 5, the spray heads 20 are arranged in the placing grooves 19, an annular cavity 21 is formed in the lower die 1 based on the strip-shaped cavity 5 as the center of circle, a plurality of connecting holes 22 are formed in the inner wall of the annular cavity 21 and communicated with the spray heads 20 in the placing grooves 19, a feeding hole 23 communicated with the annular cavity 21 is formed in the top side of the lower die 1, a pressurizing rod 24 matched with the feeding hole 23 is arranged on the bottom side of the upper die 2, a piston 25 is sleeved on the pressurizing rod 24, and the piston 25 is connected with the inner wall of the feeding hole 23 in a sealing mode.
The number of the spray heads 20 is at least three, and the spray heads 20 are uniformly arranged in a ring shape based on the strip-shaped cavity 5, so that the periphery of the hole forming rod 73 can be uniformly sprayed with the release agent.
A core pulling method for an injection mold comprises the following steps:
s1: filling the annular cavity 21 with the release agent through the feed hole 23, preferably overflowing into the feed hole 23, so as to ensure sufficient release agent;
s2: aligning the positioning rod 18 and the extrusion rod 24 with the positioning hole 17 and the feeding hole 23 respectively, closing the upper die 2 and the lower die 1, driving a piston 25 to move downwards by the extrusion rod 24 to extrude a release agent, and enabling the release agent to enter the spray head 20 through the connecting hole 22 after being pressed and to be sprayed out of the spray head 20; meanwhile, in the process that the positioning rod 18 moves downwards, the positioning rod 18 contacts the pressure bearing seat 14 and drives the pressure bearing seat 14 to move downwards, the pressure bearing seat 14 drives the mounting seat 12 to slide downwards, the mounting seat 12 drives the roller 13 to move, the roller 13 extrudes the wedge block 11 to move towards the direction close to the upper mold core 4, the wedge block 11 drives the core rod 7 to move, at the moment, the spring 9 slowly enters a stretching state, in the process that the core rod 7 moves, a release agent is sprayed on the hole forming rod 73, and when the round table 72 is in sealing contact with the junction of the strip-shaped cavity 5 and the through hole 6, the mold closing is completed;
s3: injecting molten raw materials into the mold cavity 3, and cooling and molding;
s4: and (3) stripping after molding, moving the upper die 2 upwards, driving the positioning rod 18 to move upwards and separate from the positioning hole 17 by the upper die 2, resetting the core rod 7 under the action of the spring 9 in the process, driving the wedge block 11 by the core rod 7 to extrude the mounting block 12 to reset, and realizing core pulling at the moment.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. The utility model provides a mechanism of loosing core for injection mold, the mechanism of loosing core sets up in injection mold, injection mold includes lower mould (1) and last mould (2), be provided with model chamber (3) on lower mould (1), be provided with mold core (4), its characterized in that on going up mould (2): the core pulling mechanism comprises a core rod (7), the core rod (7) comprises a loop bar (71), one end, close to the upper mold core (4), of the loop bar (71) is provided with a hole forming rod (73) with the diameter smaller than that of the loop bar (71), and a circular truncated cone (72) is arranged between the hole forming rod (73) and the loop bar (71); a strip-shaped cavity (5) is formed in the lower die (1), a through hole (6) communicated with the die cavity (3) is formed in the inner wall of one side, close to the die cavity (3), of the strip-shaped cavity (5), a fixing rod (8) is sleeved on the loop bar (71) in a sliding mode, the fixing rod (8) is fixedly installed in the strip-shaped cavity (5), and a spring (9) used for resetting the loop bar (71) is sleeved on the fixing rod (8); the round table (72) is in sealing contact with the junction of the strip-shaped cavity (5) and the through hole (6), and the hole forming rod (73) penetrates through the through hole (6);
a groove (10) is formed in the top side of the strip-shaped cavity (5), a positioning hole (17) communicated with the groove (10) is formed in the top side of the lower die (4), and a positioning rod (18) matched with the positioning hole (17) is arranged on the bottom side of the lower die (4); a linkage structure which drives the core rod (7) to move towards the direction close to the upper mold core (4) in the process that the positioning rod (18) moves downwards is arranged in the groove (10).
2. The core-pulling mechanism for an injection mold according to claim 1, characterized in that: the linkage structure comprises a wedge-shaped block (11) which is arranged on the top side of the core rod (7) and extends into the groove (10), and further comprises an extrusion assembly which is slidably mounted on the inner wall of one side of the groove (10) and is used for extruding the wedge-shaped block (11), and the extrusion assembly is in contact with the positioning rod (18).
3. A core-pulling mechanism for an injection mold according to claim 2, characterized in that: the extrusion assembly comprises a mounting seat (12), a roller (13) is rotatably mounted on the mounting seat (12), and the roller (13) is in contact with the inclined surface of the wedge-shaped block (11); the installation block (12) is provided with a pressure bearing seat (14), and the pressure bearing seat (14) is in contact with the positioning rod (18).
4. A core-pulling mechanism for an injection mold according to claim 3, characterized in that: a sliding rail (15) is arranged on the inner wall of one side of the groove (10), a sliding block (16) is arranged on the mounting block (12), and the sliding block (16) is in sliding connection with the sliding rail (15).
5. A core-pulling mechanism for an injection mold according to claim 4, characterized in that: the core-pulling mechanism further comprises a release agent spraying structure for automatically spraying a release agent on the boring bar (73) in the process that the boring bar (73) slides into the mold cavity (3).
6. A core-pulling mechanism for an injection mold according to claim 5, characterized in that: the release agent spraying structure comprises a plurality of spray heads (20), a plurality of placing grooves (19) are formed in the inner wall of a strip-shaped cavity (5), the spray heads (20) are arranged in the placing grooves (19), an annular cavity (21) is formed in the lower die (1) based on the strip-shaped cavity (5) as the circle center, a plurality of connecting holes (22) are formed in the inner wall of the annular cavity (21) and communicated with the spray heads (20) in the placing grooves (19), a feeding hole (23) communicated with the annular cavity (21) is formed in the top side of the lower die (1), a pressure rod (24) matched with the feeding hole (23) is arranged on the bottom side of the upper die (2), and a piston (25) is sleeved on the pressure rod (24).
7. The core pulling mechanism for an injection mold according to claim 6, wherein: the number of the spray heads (20) is at least three, and the spray heads (20) are uniformly arranged in a ring shape based on the strip-shaped cavity (5).
8. A core pulling method for an injection mold using the core pulling mechanism according to claim 7, characterized by comprising the steps of:
s1: filling the annular cavity (21) with a release agent through the feeding hole (23);
s2: aligning the positioning rod (18) and the extrusion rod (24) with the positioning hole (17) and the feeding hole (23) respectively, matching an upper die (2) with the lower die (1), extruding a release agent and uniformly spraying the release agent on the sliding hole forming rod (73) through the spray head (20), and extruding the wedge block (11) to drive the hole forming rod (73) to slide into the die cavity (3);
s3: injecting molten raw materials into the mold cavity (3) and cooling and molding;
s4: and moving the upper die (2) upwards to perform die stripping, and contracting the hole forming rod (73) into the strip-shaped cavity (5) under the action of the spring (9) to realize core pulling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211063564.0A CN115230096A (en) | 2022-09-01 | 2022-09-01 | Core pulling mechanism and core pulling method for injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211063564.0A CN115230096A (en) | 2022-09-01 | 2022-09-01 | Core pulling mechanism and core pulling method for injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115230096A true CN115230096A (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211063564.0A Pending CN115230096A (en) | 2022-09-01 | 2022-09-01 | Core pulling mechanism and core pulling method for injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115230096A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116494477A (en) * | 2023-06-28 | 2023-07-28 | 江苏精仪达科技有限公司 | Forming device of plastic shell |
| CN116587526A (en) * | 2023-04-24 | 2023-08-15 | 浙江强力龙鞋业科技有限公司 | Continuous injection molding, shaping and drying assembly line for soles and production method |
-
2022
- 2022-09-01 CN CN202211063564.0A patent/CN115230096A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116587526A (en) * | 2023-04-24 | 2023-08-15 | 浙江强力龙鞋业科技有限公司 | Continuous injection molding, shaping and drying assembly line for soles and production method |
| CN116587526B (en) * | 2023-04-24 | 2024-02-09 | 浙江强力龙鞋业科技有限公司 | Continuous injection molding, shaping and drying assembly line for soles and production method |
| CN116494477A (en) * | 2023-06-28 | 2023-07-28 | 江苏精仪达科技有限公司 | Forming device of plastic shell |
| CN116494477B (en) * | 2023-06-28 | 2023-08-22 | 江苏精仪达科技有限公司 | Forming device of plastic shell |
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