Bidirectional core-pulling combined action mold with self-locking mechanism

Abstract

The invention discloses a two-way core-pulling combined action mold with a self-locking mechanism, and relates to the technical field of molds, the two-way core-pulling combined action mold comprises a base, a rear mold body, a front mold body and a top seat are sequentially arranged above the base, and a core-pulling forming part used for forming a guide plate framework is arranged in the rear mold body; the rear mold body comprises a rear mold lower part and a rear mold upper part, the rear mold upper part is positioned above the rear mold lower part, and the core-pulling forming part is positioned in the rear mold upper part; and a primary core-pulling block is arranged in the upper part of the rear mold. According to the bidirectional core-pulling combined action mold with the self-locking mechanism, the primary core-pulling block, the secondary core-pulling block and other structures are arranged at different angles and move in sequence according to a specific sequence, so that efficient demolding of a product is achieved, the overall structure of the mold is simplified, and the machining difficulty and manufacturing cost of the mold are reduced; and the use efficiency of the bidirectional core-pulling combined action mold is obviously improved, the production cycle is shortened, and the production benefit is improved.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a bidirectional core-pulling combination mold with a self-locking mechanism. Background Technology

[0002] A mold is a set of molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, a mold is a tool used to create shaped objects; this tool is composed of various parts, and different molds are composed of different parts. It primarily achieves the shaping of objects by changing the physical state of the material being molded.

[0003] When processing automotive air deflector frame products, there is a requirement to change the design in the middle area of ​​the product. At the same time, there is a positioning post designed at a 45° angle to the demolding direction in this area, and there is also a card slot structure with multiple steps nearby. Since the demolding direction of the card slot is at a large 45° downward slope to the main mold opening, if the design is to directly pull the core, the mold processing will be difficult, and the template will be hollowed out too much, resulting in a decrease in mold strength and an improvement in efficiency.

[0004] Therefore, it is necessary to propose a bidirectional core-pulling combination mold with a self-locking mechanism to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a bidirectional core-pulling combination mold with a self-locking mechanism to solve the problem of changing the design of the middle area of ​​the product when processing automotive air deflector frame products. At the same time, this area has a positioning post designed at a 45° angle with the demolding direction, and there is also a card slot structure with multiple steps nearby. Since the demolding direction of the card slot is at a large downward angle of 45° with the main mold opening, if the core-pulling is designed directly, the mold processing will be difficult, and the template will be too hollowed out, resulting in a decrease in mold strength and an inefficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bidirectional core-pulling combination mold with a self-locking mechanism, comprising a base, a rear mold body, a front mold body and a top seat arranged sequentially above the base, and a core-pulling forming part for forming a guide plate skeleton provided inside the rear mold body; The rear mold body includes a lower rear mold and an upper rear mold. The upper rear mold is located above the lower rear mold. The lower rear mold is fixedly connected to the base. The core-pulling forming part is located in the upper rear mold. A primary core-pulling block is provided in the upper part of the rear mold. The primary core-pulling block is inclined, and the upward inclined end of the primary core-pulling block corresponds to the card slot of the guide plate frame. A movable block for forming the positioning column of the guide plate frame is attached to the inclined surface of the bottom of the primary core-pulling block. A groove is opened on the upper part of the rear mold. A spring is fixedly connected inside the groove. The top end of the spring is fixedly connected to the bottom of the movable block. A secondary core-pulling block is attached to the inclined surface at the top of the primary core-pulling block.

[0007] Preferably, the secondary core-pulling block has an inclined surface at one end near the primary core-pulling block.

[0008] Preferably, a push block is provided below the secondary core-pulling block, the push block is attached to the lower part of the rear mold, a bottom groove is provided at the bottom of the secondary core-pulling block, and an upper flange is integrally formed at the top of the push block. The upper flange is slidably disposed inside the bottom groove, and the width of the upper flange is smaller than the width of the bottom groove.

[0009] Preferably, a fixing block is fixedly installed on the lower part of the rear mold by screws, the fixing block abutting against the push block and the secondary core-pulling block.

[0010] Preferably, the top of the secondary core-pulling block is provided with a replacement insert that is adapted to the guide plate skeleton.

[0011] Preferably, the top of the secondary core-pulling block is provided with a slider, the bottom of the slider is integrally formed with a lower flange, the top of the secondary core-pulling block is provided with a stepped groove that matches the lower flange, and the slider abuts against the side of the replacement insert away from the guide plate frame.

[0012] Preferably, the top of the fixing block is provided with a slot, the slot is located at the end of the fixing block away from the push block, and a limit block is provided inside the slot, the limit block abutting against the slider.

[0013] Preferably, the secondary core-pulling block is provided with a pull rod.

[0014] Preferably, a front mold pressing block is provided on the front mold body, and the front mold pressing block is pressed against the top of the replacement insert.

[0015] Preferably, the front mold body includes a lower front mold part and an upper front mold part, the upper front mold part is located above the lower front mold part, the lower front mold part is attached to the top of the upper rear mold part, the front mold pressure block is located in the lower front mold part, the top seat is fixedly connected to the top of the upper front mold part, and guide posts are fixedly connected to the four corners of the top of the upper rear mold part.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention sets up a primary core-pulling block and a secondary core-pulling block, which are arranged at different angles and move in a specific sequence to achieve efficient product demolding. This not only simplifies the overall structure of the mold and reduces the processing difficulty and manufacturing cost of the mold, but also significantly improves the utilization efficiency of the bidirectional core-pulling combination mold, reduces the production cycle, and improves production efficiency. 2. The combination of the primary core-pulling block, the secondary core-pulling block, and the replacement insert is also a highlight. The replacement insert, as an independent, detachable component, is specifically designed for different replacement areas of the guide vane frame. When the product style changes or the mold needs repair, there is no need for large-scale disassembly of the entire mold; only the corresponding replacement insert needs to be replaced. This not only simplifies the mold disassembly and repair process, saving repair time and labor costs, but also further improves the efficiency of the bidirectional core-pulling combination mold. 3. By using the inclined surfaces of the primary and secondary core-pulling blocks to form a double-wedge self-locking mechanism, the cavity can still maintain zero clearance under high injection pressure, completely eliminating flash and burrs, and improving the appearance quality of the product. 4. The elastic reset system composed of spring and movable block realizes automatic pop-up without power source, eliminating the need for an additional ejection mechanism, simplifying the control system and reducing energy consumption; 5. The contact surfaces of the push block and the fixed block are fixed with detachable screws, which can be replaced separately after wear, extending the overall life of the mold and reducing maintenance costs; 6. The slider, limit block and stepped groove form a multi-directional limit, which effectively prevents the secondary core pulling block from moving backward or rotating during high-pressure injection, and ensures long-term stability of dimensional accuracy. 7. The independent modular design of the replacement inserts supports quick replacement within minutes, enabling multi-specification co-production on the same mold and significantly reducing downtime for mold changes; 8. All core-pulling movements are completed inside the mold, eliminating the need for external hydraulic cylinders or motors. The mold has a compact shape and strong versatility. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the bidirectional core-pulling combination action mold structure with self-locking mechanism of the present invention.

[0018] Figure 2 This is a schematic diagram of the lower and upper parts of the rear mold of the present invention.

[0019] Figure 3 This is a schematic diagram of the front mold pressing block and guide plate skeleton structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the primary and secondary core-pulling blocks of the present invention.

[0021] Figure 5 This is a schematic diagram of the upper part of the rear mold and the guide post structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the lower part of the rear mold and the guide post structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the front mold pressing block and slider structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the alternative insert and slider structure of the present invention.

[0025] Figure 9 This is a schematic diagram of the front mold pressing block structure of the present invention.

[0026] In the diagram: 1. Base; 2. Rear mold body; 201. Lower part of rear mold; 202. Upper part of rear mold; 3. Front mold body; 301. Lower part of front mold; 302. Upper part of front mold; 4. Top seat; 5. Front mold pressure block; 6. Guide plate skeleton; 7. Positioning post; 8. Card slot; 9. Change insert; 10. Guide post; 11. Primary core-pulling block; 12. Movable block; 13. Groove; 14. Spring; 15. Limiting block; 16. Push block; 17. Bottom groove; 18. Upper flange; 19. Secondary core-pulling block; 20. Slider; 21. Stepped groove; 22. Lower flange; 23. Fixing block; 24. Card slot; 25. Pull rod. Detailed Implementation

[0027] This invention provides, for example Figures 1-9 The mold shown is a bidirectional core-pulling combination mold with a self-locking mechanism. The mold has a sophisticated structure and can efficiently realize core-pulling and demolding operations. It is widely applicable to the production and manufacturing of various complex injection molded products, and has significant advantages, especially for guide plate skeleton products with special structures such as positioning pillars and card slots.

[0028] The mold includes a base 1, and a rear mold body 2, a front mold body 3, and a top seat 4 are arranged sequentially on the top of the base 1. The rear mold body 2 includes a lower rear mold part 201 and an upper rear mold part 202. The upper rear mold part 202 is located above the lower rear mold part 201, and the lower rear mold part 201 is fixedly connected to the base 1. The front mold body 3 includes a lower front mold part 301 and an upper front mold part 302. The upper front mold part 302 is located above the lower front mold part 301, and the lower front mold part 301 is attached to the top of the upper rear mold part 202. The top seat 4 is fixedly connected to the top of the upper front mold part 302.

[0029] Guide pillars 10 are fixedly connected to the four corners of the top of the upper part 202 of the rear mold, and guide holes adapted to the guide pillars 10 are opened on the front mold body 3 to ensure that the front mold body 3 moves up and down stably.

[0030] Considering that the guide plate frame 6 has positioning posts 7 and card slots 8, and is equipped with replacement inserts 9 for installation, core pulling is required. To improve the efficiency of core pulling, a core pulling forming part for forming the guide plate frame 6 is provided inside the rear mold body 2. The core pulling forming part is located in the upper part 202 of the rear mold. A primary core pulling block 11 is provided in the upper part 202 of the rear mold. The primary core pulling block 11 is inclined, and the upward inclined end of the primary core pulling block 11 corresponds to the card slot 8 of the guide plate frame 6.

[0031] A movable block 12 for forming the positioning column 7 of the guide plate skeleton 6 is attached to the inclined surface at the bottom of the core-pulling block 11. A groove 13 is provided on the upper part 202 of the rear mold. A spring 14 is fixedly connected inside the groove 13. The top of the spring 14 is fixedly connected to the bottom of the movable block 12.

[0032] A secondary core-pulling block 19 is attached to the inclined surface at the top of the primary core-pulling block 11. The secondary core-pulling block 19 has an inclined surface at one end near the primary core-pulling block 11, which is adapted to the primary core-pulling block 11. A pull rod 25 is provided on the secondary core-pulling block 19 to facilitate pulling the secondary core-pulling block 19.

[0033] A push block 16 is provided below the secondary core-pulling block 19. The push block 16 is attached to the lower part 201 of the rear mold. A bottom groove 17 is provided at the bottom of the secondary core-pulling block 19. An upper flange 18 is integrally formed at the top of the push block 16. The upper flange 18 is slidably disposed inside the bottom groove 17. The width of the upper flange 18 is smaller than the width of the bottom groove 17.

[0034] A fixing block 23 is fixedly installed on the lower part 201 of the rear mold by screws. The fixing block 23 abuts against the push block 16 and the secondary core pulling block 19.

[0035] The top of the secondary core-pulling block 19 is provided with a replacement insert 9 that is adapted to the guide plate frame 6. The top of the secondary core-pulling block 19 is provided with a slider 20. The bottom of the slider 20 is integrally formed with a lower flange 22. The top of the secondary core-pulling block 19 is provided with a stepped groove 21 that is adapted to the lower flange 22. The slider 20 abuts against the side of the replacement insert 9 away from the guide plate frame 6.

[0036] The top of the fixing block 23 is provided with a slot 24, which is located at the end of the fixing block 23 away from the push block 16. A limit block 15 is provided inside the slot 24, and the limit block 15 abuts against the slider 20.

[0037] A front mold pressing block 5 is provided on the front mold body 3. The front mold pressing block 5 is located in the lower part 301 of the front mold and is pressed against the top of the replacement insert 9.

[0038] In practical use, refer to Figure 4In the indicated state, the bottom inclined surface of the primary core-pulling block 11 is tightly fitted onto the movable block 12, and the spring 14 is in a contracted state. The movable block 12 forms a cavity for the positioning post 7 to be formed. The push block 16 abuts against the bottom end of the primary core-pulling block 11, and the secondary core-pulling block 19 abuts against the top inclined surface of the primary core-pulling block 11, forming a stable connection and support. Simultaneously, the replacement insert 9 overlaps the top of the secondary core-pulling block 19, and the front mold pressure block 5 abuts against the top of the replacement insert 9. Through the synergistic action of the slider 20, the limiting block 15, and the fixing block 23, a precise self-locking effect is achieved, ensuring the stability of the mold during the injection molding process and the molding quality of the product.

[0039] In the demolding process, the limiting block 15 and the slider 20 must first be removed, and the fixing block 23 should be loosened appropriately. When the fixing block 23 loses its squeezing effect on the push block 16 and the secondary core-pulling block 19, the push block 16 moves towards the fixing block 23, pushing the primary core-pulling block 11 to move to the lower right, successfully completing the first core-pulling action and releasing the restriction on the card slot 8. Next, under the strong restoring force of the spring 14, the movable block 12 springs upward, releasing the restriction on the positioning post 7, creating conditions for subsequent demolding operations. Subsequently, the secondary core-pulling block 19 is pulled to the right by the pull rod 25 to achieve the second core-pulling. After the secondary core-pulling block 19 and the replacement insert 9 are misaligned by a certain distance, the replacement insert 9 falls downward under its own weight or external auxiliary demolding force, thus completing the demolding process and allowing the product to be successfully removed.

[0040] This invention cleverly sets up a primary core-pulling block 11 and a secondary core-pulling block 19, which are arranged at different angles and move in a specific sequence, thereby achieving efficient demolding of the product. This not only simplifies the overall structure of the mold and reduces the processing difficulty and manufacturing cost of the mold, but also significantly improves the utilization efficiency of the bidirectional core-pulling combination mold, reduces the production cycle, and improves production efficiency.

[0041] Furthermore, the coordination between the primary core-pulling block 11, the secondary core-pulling block 19, and the replacement insert 9 is also a highlight. The replacement insert 9, as an independent, detachable component, is specifically designed for different replacement areas of the guide plate frame 6. When the product style changes or the mold needs repair, there is no need for large-scale disassembly of the entire mold; only the corresponding replacement insert 9 needs to be replaced. This not only simplifies the mold disassembly and repair process, saving repair time and labor costs, but also further improves the utilization efficiency of the bidirectional core-pulling combination mold.

[0042] The inclined surfaces of the primary core-pulling block 11 and the secondary core-pulling block 19 cooperate to form a double-wedge self-locking mechanism, which can maintain zero gap in the cavity even under high injection pressure, completely eliminating flash and burrs, and improving the appearance quality of the product.

[0043] The elastic reset system composed of spring 14 and movable block 12 enables automatic popping without a power source, eliminating the need for an additional ejection mechanism, simplifying the control system and reducing energy consumption.

[0044] The contact surfaces of the push block 16 and the fixed block 23 are fixed with detachable screws, which can be replaced separately after wear, thus extending the overall life of the mold and reducing maintenance costs.

[0045] The slider 20, the limiting block 15 and the stepped groove 21 form a multi-directional limiting, which effectively prevents the secondary core-pulling block 19 from retreating or rotating during high-pressure injection, ensuring long-term stability of dimensional accuracy.

[0046] The independent modular design of the replacement insert 9 supports quick replacement within 5 minutes, enabling multi-specification co-production of the same mold and significantly reducing downtime for mold changes.

[0047] All core-pulling movements are completed inside the mold, eliminating the need for external hydraulic cylinders or motors. The mold has a compact shape and is highly versatile.

Claims

1. A bidirectional core-pulling combination mold with a self-locking mechanism, comprising a base (1), characterized in that: The base (1) is provided with a rear mold body (2), a front mold body (3) and a top seat (4) in sequence above it. The interior of the rear mold body (2) is provided with a core-pulling forming part for forming the guide plate skeleton (6). The rear mold body (2) includes a lower rear mold (201) and an upper rear mold (202). The upper rear mold (202) is located above the lower rear mold (201). The lower rear mold (201) is fixedly connected to the base (1), and the core-pulling part is located in the upper rear mold (202). A primary core-pulling block (11) is provided in the upper part (202) of the rear mold. The primary core-pulling block (11) is inclined, and the upward inclined end of the primary core-pulling block (11) corresponds to the card slot (8) of the guide plate frame (6). A movable block (12) for forming the positioning column (7) of the guide plate frame (6) is attached to the inclined surface at the bottom of the primary core-pulling block (11). A groove (13) is opened on the upper part (202) of the rear mold. A spring (14) is fixedly connected inside the groove (13). The top end of the spring (14) is fixedly connected to the bottom of the movable block (12). A secondary core-pulling block (19) is attached to the inclined surface at the top of the primary core-pulling block (11).

2. The bidirectional core-pulling combination mold with a self-locking mechanism according to claim 1, characterized in that: The secondary core-pulling block (19) has an inclined surface at one end near the primary core-pulling block (11).

3. The bidirectional core-pulling combination mold with a self-locking mechanism according to claim 1, characterized in that: A push block (16) is provided below the secondary core-pulling block (19). The push block (16) is attached to the lower part (201) of the rear mold. A bottom groove (17) is provided at the bottom of the secondary core-pulling block (19). An upper flange (18) is integrally formed at the top of the push block (16). The upper flange (18) is slidably disposed inside the bottom groove (17). The width of the upper flange (18) is smaller than the width of the bottom groove (17).

4. A bidirectional core-pulling combination mold with a self-locking mechanism according to claim 3, characterized in that: A fixing block (23) is fixedly installed on the lower part (201) of the rear mold by screws. The fixing block (23) abuts against the push block (16) and the fixing block (23) abuts against the secondary core pulling block (19).

5. A bidirectional core-pulling combination mold with a self-locking mechanism according to claim 4, characterized in that: The top of the secondary core-pulling block (19) is provided with a replacement insert (9) that is compatible with the guide plate skeleton (6).

6. A bidirectional core-pulling combination mold with a self-locking mechanism according to claim 5, characterized in that: The top of the secondary core-pulling block (19) is provided with a slider (20), the bottom of the slider (20) is integrally formed with a lower flange (22), the top of the secondary core-pulling block (19) is provided with a stepped groove (21) that matches the lower flange (22), and the slider (20) abuts against the side of the replacement insert (9) away from the guide plate frame (6).

7. A bidirectional core-pulling combination mold with a self-locking mechanism according to claim 6, characterized in that: The top of the fixing block (23) is provided with a slot (24), which is located at the end of the fixing block (23) away from the push block (16). A limit block (15) is provided inside the slot (24), which abuts against the slider (20).

8. A bidirectional core-pulling combination mold with a self-locking mechanism according to claim 1, characterized in that: A pull rod (25) is provided on the secondary core-pulling block (19).

9. A bidirectional core-pulling combination mold with a self-locking mechanism according to claim 1, characterized in that: A front mold pressing block (5) is provided on the front mold body (3), and the front mold pressing block (5) is pressed against the top of the changing insert (9).

10. A bidirectional core-pulling combination mold with a self-locking mechanism according to claim 9, characterized in that: The front mold body (3) includes a lower front mold (301) and an upper front mold (302). The upper front mold (302) is located above the lower front mold (301). The lower front mold (301) is attached to the top of the upper rear mold (202). The front mold pressure block (5) is located in the lower front mold (301). The top seat (4) is fixedly connected to the top of the upper front mold (302). Guide posts (10) are fixedly connected to the four corners of the top of the upper rear mold (202).

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