A combined pin ejector mechanism for injection mold

Abstract

The application discloses a combined row position insert pin extracting mechanism of an injection mold, which comprises an opening and closing mold row position system and a pin row position system, wherein the opening and closing mold row position system is used for the injection molding and opening and closing of bone positions and hole positions on the side wall of an injection product, and the pin row position system is used for the resetting and separation of corresponding row position inserts of coaxial hole positions on the two side walls of a groove-shaped structure of the injection product, the smooth opening and closing of the injection mold and the injection molding production of the injection product are realized by controlling the movement sequence of the two sets of row position systems, and the structural problem of the injection mold of the coaxial hole injection product with the groove-shaped structure on the two side walls of the groove-shaped injection product is solved.

Description

Technical Field

[0001] This invention relates to an injection mold structure, and more particularly to a composite slide insert pin extraction mechanism for injection molds. It solves the design and injection production problems of injection molds with coaxial through holes and blind holes on both sides of deep groove products by combining an opening and closing slide system and a pin extraction slide system. Background Technology

[0002] With the improvement of injection mold processing and manufacturing technology, the requirements for integrated design of products and parts are also getting higher and higher. Product designers hope to design different structures on the same part and complete mass production with the help of injection molds. For example, the injection molded product has a deep groove structure and coaxial through holes and blind holes on both sides. The deep groove needs to be formed by mold inserts to form its injection cavity, but the blind hole side of the deep groove corresponding to the insert cannot be injection molded with the help of ordinary mold structure. Summary of the Invention

[0003] This invention addresses the aforementioned technical challenges by providing a composite slide insert pin-pulling mechanism for injection molds. The mechanism includes a product, a first through-hole pin, a second through-hole pin, a spring, a pin base, a slide insert, a through-hole insert, a crank rod, a limit block, a crank rod base, a transmission rod, a hydraulic cylinder, a limit rod, a first limit switch, a second limit switch, a cylinder mounting bracket, a cylinder mounting seat, a first slide, a slide seat, a first inclined guide post seat, a second inclined guide post seat, an first inclined guide post, a second inclined guide post, a crank rod guide seat, a front mold plate, a rear mold plate, a crank rod groove, and a limit insert. The composite slide mechanism for the injection mold includes an opening / closing slide system and a pin-pulling slide system.

[0004] The product has a groove-shaped structure, and product through hole one, product blind hole one, product through hole two and product blind hole two are opened on the two side walls of the groove-shaped structure. Product through hole one and product blind hole one are coaxial holes, and product through hole two and product blind hole two are coaxial holes.

[0005] The mold opening and closing sliding system includes a front template, a rear template, a sliding body 1, a sliding body seat, an inclined guide pillar seat 1, an inclined guide pillar seat 2, an inclined guide pillar 1, and an inclined guide pillar 2. The inclined guide pillar 1 and the inclined guide pillar 2 are respectively fitted and fastened in the inclined guide pillar seat 1 and the inclined guide pillar seat 2. The inclined guide pillar seat 1 and the inclined guide pillar seat 2 are fixedly installed on the front template. The sliding body seat has inclined cylindrical holes corresponding to the inclined guide pillar 1 and the inclined guide pillar 2. When the mold is opened and closed, the sliding body seat slides back and forth along the surface of the rear template in coordination with the up and down movement of the inclined guide pillar 1 and the inclined guide pillar 2.

[0006] The pin-drawing and sliding system includes a through pin one, a through pin two, a spring, a pin base, a sliding insert, a through insert, a crank rod, a limit block, a crank rod base, a transmission rod, a hydraulic cylinder, a limit rod, a limit switch one, a limit switch two, a cylinder mounting bracket, a cylinder mounting seat, a crank rod guide seat, a crank rod groove, and a limit insert. The crank rod groove and the limit block are securely mounted to the front template, and the crank rod guide seat is securely mounted to a groove on the front template that mates with it. The crank rod can slide along the crank rod guide seat. The crankshaft slides left and right in the direction of the groove in the crankshaft groove; the cylinder mounting bracket is securely installed on the front template, the cylinder mounting seat is securely installed on the cylinder mounting bracket, the hydraulic cylinder is fixedly installed on the cylinder mounting seat, the front end of the hydraulic cylinder's transmission rod is securely installed to the crankshaft base, the tail end of the crankshaft is securely installed in the T-groove on the crankshaft base, limit switch one and limit switch two are installed on the cylinder mounting bracket, the limit rod is securely installed on the crankshaft base, and the limit rod is triggered when it contacts limit switch one and limit switch two. It sends a limit signal; the sliding insert has an oblique square hole with the same shape as the oblique square column guide part at the top of the crank arm. The sliding insert is installed on the crank arm. When the crank arm moves left and right, it drives the sliding insert to move back and forth along the front template surface. The conical protrusion machined on the sliding insert is installed in the conical hole on the pin base, which can drive the pin base to move back and forth along the sliding seat surface. Through pin one and through pin two are fastened in the T-shaped groove opened on the pin base. The spring is installed in the pin in a pre-compressed state. The cylindrical holes on the base and slide seat are used to insert through-holes. Through-holes are securely mounted on the front template. The through-holes have two circular holes: Insert Hole 1 and Insert Hole 2. When the injection mold is closed, through-holes 1 and 2 pass through the through-holes on the through-holes, respectively. During injection molding, through-hole 1 corresponds to the product through-hole 1 and product blind hole 1, and through-hole 2 corresponds to the product through-hole 2 and product blind hole 2. A limiting insert is securely mounted on the rear template to limit the retraction position of the insert base.

[0007] The beneficial effects of the present invention are as follows: The injection mold composite slide insert needle extraction mechanism, through the cooperation of the mold opening and closing slide system and the needle extraction slide system and the control of the action sequence of the two slide systems, realizes that the through insert needle is inserted into the mold through insert according to the product structure requirements during injection molding production, thereby realizing the integrated injection molding of coaxial through holes and blind holes on both sides of the deep groove structure product. Attached Figure Description

[0008] Figure 1 This is a product illustration.

[0009] Figure 2 This is a schematic diagram of the overall structure of the needle-pulling mechanism for the composite slide insert in an injection mold.

[0010] Figure 3This is a schematic diagram of the slide insert structure of an injection mold.

[0011] Figure 4 This is a schematic diagram of a through-hole insert structure for an injection mold.

[0012] Figure 5 This is a schematic diagram of the slide seat and slide 1 structure of an injection mold.

[0013] Figure 6 This is a partial structural diagram of the injection mold insert system (without inserts).

[0014] Figure 7 This is a partial structural diagram (without through inserts) of the injection mold insert guide system.

[0015] Figure 8 This is a partial structural diagram of the injection mold insert pin positioning system.

[0016] Figure 9 This is a schematic diagram of a partial composite slide structure (without slide inserts) in an injection mold.

[0017] Figure 10 This is a schematic diagram of a partial composite slide (without through inserts) in an injection mold.

[0018] Figure 11 This is a schematic diagram of the composite sliding structure of an injection mold.

[0019] Figure 12 This is a schematic diagram of the composite slide structure of an injection mold from another angle.

[0020] The components are: 1. Product; 2. Through-hole pin one; 3. Through-hole pin two; 4. Spring; 5. Pin base; 6. Sliding insert; 7. Through-hole insert; 8. Crank rod; 9. Limit block; 10. Crank rod base; 11. Transmission rod; 12. Hydraulic cylinder; 13. Limit rod; 14. Limit switch one; 15. Limit switch two; 16. Cylinder mounting bracket; 17. Cylinder mounting seat; 18. Sliding element one; 19. Pathfinder seat; 20. Angled guide post seat one; 21. Angled guide post seat two; 22. Angled guide post one; 23. Angled guide post two; 24. Crank rod guide seat; 25. Front template; 26. Rear template; 27. Crank rod slide groove; 28. Limiting insert; 1a. Product through hole one; 1b. Product through hole two; 1c. Product blind hole one; 1d. Product blind hole two; 7a. Insert round hole one; 7b. Insert round hole two. Detailed Implementation

[0021] As attached Figures 1-12As shown, a composite sliding insert needle-pulling mechanism for injection molds includes a product 1, a through-hole insert 1, a through-hole insert 2, a spring 4, an insert base 5, a sliding insert 6, a through-hole insert 7, a crank rod 8, a limit block 9, a crank rod base 10, a transmission rod 11, a hydraulic cylinder 12, a limit rod 13, a limit switch 14, a limit switch 2 15, a cylinder fixing bracket 16, a cylinder fixing seat 17, a sliding block 18, a sliding block seat 19, a slanted guide post seat 1 20, a slanted guide post seat 2 21, a slanted guide post 1 22, a slanted guide post 2 23, a crank rod guide seat 24, a front mold plate 25, a rear mold plate 26, a crank rod slide groove 27, and a limit insert 28. The composite sliding mechanism of the injection mold includes an opening and closing sliding system and a needle-pulling sliding system.

[0022] As attached Figure 1 As shown, product 1 has a groove-shaped structure with coaxial through holes 1a and blind holes 1c on both sides of the groove-shaped structure. Through holes 1b and blind holes 1d are also coaxial holes. Through insert 7 forms the molding cavity of the groove-shaped part of product 1. Through insert pin 2 and through insert pin 3 pass through through insert 7 to form the molding cavity of coaxial through holes 1a and blind holes 1c, as well as coaxial through holes 1b and blind holes 1d on product 1. The front and rear mold opening and closing sliding system controls the movement of through insert 7, and the insert pin removal sliding system controls the movement of through insert pin 2 and through insert pin 3. In the process of opening and closing the mold, in order to avoid interference between the movement of the insert pins and inserts, it is necessary to reasonably control the movement sequence of the two sliding systems to achieve smooth demolding of the product. The mold closing and opening actions of the injection mold both include two movement stages.

[0023] As attached Figure 2 Appendix Figures 6-12The images show the state of the mold mechanism when the injection mold is closed and the injection is complete. After product 1 is injected, the injection mold initiates the first stage of the mold opening action. In this stage, the hydraulic cylinder 12 drives the transmission rod 11 to retract, thereby driving the crank base 10 and crank 8 to retract. The crank 8 drives the sliding insert 6 to retract. The boss and cylinder at the front end of the sliding insert 6 retract from product 1, achieving partial demolding. The tapered protrusion at the lower end of the sliding insert 6 drives the insert base 5 to retract, driving the through insert 1 2 and through insert 2 3 to retract. At this time, through insert 1 2 and through insert 2 3 exit through insert 7 and product through hole 1a, product blind hole 1c, product through hole 1b, product blind hole 1d, and insert on product 1. The insert retracts and disengages from the circular hole 7a and the circular hole 7b, thus demolding the product of the insert pin part. This also avoids interference between the actions of the through insert pin 1, through insert pin 2, and through insert pin 3 and through insert 7. The pre-compressed spring 4 extends in length when the insert pin base 5 retracts relative to the slide seat 19. The limit position of the retraction movement of the insert pin base 5 is when it contacts the limit insert 28 installed on the rear template 26. At this time, the spring 4 is still in a compressed state. The pressure of the spring 4 ensures that the position of the insert pin base 5 relative to the rear template 26 remains unchanged. During this stage, the limit rod 13 moves to the right under the drive of the crank rod base 10 and contacts the limit switch 2 15, triggering the end signal of the retraction action of the hydraulic cylinder 12. The first stage of the injection mold opening action is completed.

[0024] In the second stage of the injection mold opening process, the front mold plate 25 and the rear mold plate 26 separate vertically. The front mold plate 25 moves upward relative to the rear mold plate 26, and the front mold plate 25 drives the through insert 7 to move upward, realizing the demolding of the deep groove shape part of product 1. In this stage, the front mold plate 25 simultaneously drives the inclined guide pillar seat 1 20, inclined guide pillar seat 21, inclined guide pillar 1 22 and inclined guide pillar 23 to move upward. The inclined guide pillar 1 22 and inclined guide pillar 23 drive the slide seat 19 to retract along the upper surface of the rear mold plate 26. The slide seat 19 drives the slide 18 to retract and separate from the outer side of product 1. In this stage, the crank rod 8 and the slide insert 6 move upward together with the front mold plate 25. The tapered protrusion at the lower end of the slide insert 6 separates from the insert base 5. The second stage of the injection mold opening process is completed, product 1 is completely demolded, and one injection molding production cycle ends.

[0025] In the first stage of mold closing, the front mold plate 25 and the rear mold plate 26 move towards each other. The front mold plate 25 moves downward relative to the rear mold plate 26, causing the through insert 7 to move downward and form the deep groove cavity of product 1 with the rear mold components. The front mold plate 25 drives the first inclined guide post 22 and the second inclined guide post 23 to move downward. The first slide 18 and the slide seat 19 move forward along the upper surface of the rear mold plate 26 under the drive of the first inclined guide post 22 and the second inclined guide post 23 to form the cavity of the outer wall of product 1. The downward movement of the front mold plate 25 drives the slide insert 6, the through insert 7, the crank 8, the limit block 9, the crank base 10, the transmission rod 11 and the hydraulic cylinder 12 to move downward together. The tapered protrusion at the lower end of the slide insert 6 is inserted into the tapered hole on the insert base 5. The lower surface of the front mold plate 25 contacts the upper surface of the rear mold plate 26. At this time, the first stage of mold closing is completed.

[0026] In the second stage of mold closing, hydraulic cylinder 12 drives transmission rod 11 and crank base 10 to extend to the left. Crank rod 8 moves to the left, driving sliding insert 6 forward. Sliding insert 6 drives insert base 5, through insert 1 2, and through insert 2 3 to insert forward through insert holes 1 7a and 2 7b on through insert 7. The front cylindrical parts of through insert 1 2 and through insert 2 3 form product through hole 1a, product blind hole 1c, product through hole 2 1b, and product blind hole on product 1. In the second stage of injection molding, the crank (8) moves to the left and contacts the limit block 9 to reach the end position. At this time, the limit rod 13 moves to the left under the drive of the crank base 10 and contacts the limit switch 14, triggering the termination signal of the hydraulic cylinder 12 extending to the left. At this time, the injection cavity of the deep groove part and the two coaxial holes of product 1 are completely formed. The second stage of injection mold closing is completed, and the injection molding process of molten rubber can be started and the product 1 can be injection molded.

[0027] A composite slide insert pin-pulling mechanism for injection molds achieves one-time injection molding of coaxial through holes and blind holes on both sides of deep groove products by coordinating and controlling the movement sequence of two sets of motion structures: the injection mold opening and closing slide system and the pin-pulling slide system. It also avoids interference between the vertical movement of the deep groove insert and the horizontal movement of the insert pins during the opening and closing motion, thus achieving smooth mold opening and closing and effective one-time injection molding of the product.

[0028] The above description represents a preferred embodiment of the present invention and is intended to illustrate the content and concept of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A composite sliding insert pin-pulling mechanism for injection molds, comprising a product (1), a first through-hole insert (2), a second through-hole insert (3), a spring (4), an insert base (5), a sliding insert (6), a through-hole insert (7), a crank rod (8), a limiting block (9), a crank rod base (10), a transmission rod (11), a hydraulic cylinder (12), a limiting rod (13), a first limit switch (14), a second limit switch (15), a cylinder fixing bracket (16), a cylinder fixing seat (17), a first sliding insert (18), a sliding insert seat (19), a first inclined guide post seat (20), a second inclined guide post seat (21), a first inclined guide post (22), a second inclined guide post (23), a crank rod guide seat (24), a front template (25), a rear template (26), a crank rod groove (27), and a limiting insert (28), characterized in that, The injection mold composite slide system includes an opening and closing slide system and a pin insertion slide system; The product (1) has a groove structure, and product through hole one (1a), product blind hole one (1c), product through hole two (1b) and product blind hole two (1d) are opened on the two side walls of the groove structure. Product through hole one (1a) and product blind hole one (1c) are coaxial holes, and product through hole two (1b) and product blind hole two (1d) are coaxial holes. The mold opening and closing sliding system includes a front template (25), a rear template (26), a sliding block one (18), a sliding block seat (19), an inclined guide pillar seat one (20), an inclined guide pillar seat two (21), an inclined guide pillar one (22), and an inclined guide pillar two (23). The inclined guide pillar one (22) and the inclined guide pillar two (23) are respectively fitted and fastened in the inclined guide pillar seat one (20) and the inclined guide pillar seat two (21). The inclined guide pillar seat one (20) and the inclined guide pillar seat two (21) are fixedly installed on the front template (25). The sliding block seat (19) has inclined cylindrical holes corresponding to the inclined guide pillar one (22) and the inclined guide pillar two (23). When the mold is opened and closed, the sliding block seat (19) slides back and forth along the surface of the rear template (26) in coordination with the up and down movement of the inclined guide pillar one (22) and the inclined guide pillar two (23). The needle insertion system includes a through-hole needle one (2), a through-hole needle two (3), a spring (4), a needle base (5), a sliding insert (6), a through-hole insert (7), a crank rod (8), a limit block (9), a crank rod base (10), a transmission rod (11), a hydraulic cylinder (12), a limit rod (13), a limit switch one (14), a limit switch two (15), a cylinder fixing bracket (16), a cylinder fixing seat (17), a crank rod guide seat (24), a crank rod slide groove (27), and a limit insert (28). The crank rod slide groove (27) and the limit block (9) are fastened to the front template (25), and the crank rod guide seat (24) is fastened to the groove on the front template (25) that matches it. The crankshaft (8) can slide left and right along the direction of the groove opened in the crankshaft guide seat (24) and the crankshaft slide groove (27); the cylinder fixing bracket (16) is fixedly installed on the front template (25), the cylinder fixing seat (17) is fixedly installed on the cylinder fixing bracket (16), the hydraulic cylinder (12) is fixedly installed on the cylinder fixing seat (17), the front end of the transmission rod (11) of the hydraulic cylinder (12) is fixedly installed on the crankshaft base (10), the tail end of the crankshaft (8) is fixedly installed in the T-shaped groove opened on the crankshaft base (10), the cylinder fixing bracket (16) is equipped with limit switch one (14) and limit switch two (15), the limit rod (13) is fixedly installed on the crankshaft base (10), and the limit rod (13) and the limit switch are fixedly installed on the crankshaft base (10). When switch one (14) and limit switch two (15) come into contact, they trigger the sending of a limit signal; the sliding insert (6) has an oblique square hole with the same shape as the oblique square column guide part at the top of the crank rod (8). The sliding insert (6) is fitted onto the crank rod (8). When the crank rod (8) moves left and right, it drives the sliding insert (6) to move back and forth along the surface of the front template (25). The conical protrusion machined on the sliding insert (6) fits into the conical hole on the pin base (5) and can drive the pin base (5) to move back and forth along the surface of the sliding seat (19). The through pin one (2) and through pin two (3) are fastened into the T-shaped groove opened on the pin base (5). The spring (4) is in a pre-compressed state and is installed on the pin base (5) and The cylindrical hole on the slide seat (19) is used to fasten the through insert (7) to the front template (25). The through insert (7) has insert hole one (7a) and insert hole two (7b). When the injection mold is closed, through insert one (2) and through insert two (3) pass through insert hole one (7a) and insert hole two (7b) on the through insert (7) respectively. During injection molding, through insert one (2) corresponds to product through hole one (1a) and product blind hole one (1c) on the product (1), and through insert two (3) corresponds to product through hole two (1b) and product blind hole two (1d) on the product (1). The limiting insert (28) is fastened to the rear template (26) to limit the retraction position of the insert base (5).

Images