Balanced unilateral stress thread releasing mechanism on sliding block

Abstract

The invention relates to the technical field of demolding of plastic products, and discloses a slider upper balance unilateral stress thread demolding mechanism which comprises a bottom plate, a slide seat, a clamping piece, a slider, a thread core, a slider insert, a first hydraulic cylinder, a plurality of groups of racks, a gear mechanism and a second hydraulic cylinder. After injection molding of a plastic part product is completed, the first hydraulic cylinder advances to drive the two racks to move, the threaded mold core rotates through cooperation of the racks and the gear mechanism, and the thread demolding action of the plastic part product is completed; after thread demolding of the plastic part product is completed, the second hydraulic cylinder is started again to drive the threaded mold core and the whole gear assembly to move, and core pulling of the plastic part product is completed; according to the structure, the auxiliary rack and the auxiliary gear are designed on the sliding block to balance the stress of the first hydraulic cylinder and the second hydraulic cylinder in the ejection process, so that the stress of the rack and the gear mechanism is balanced in the ejection process, the stable operation of the thread demolding mechanism is realized, and the mold is smoothly and reliably produced.

Description

Technical Field

[0001] The invention relates to the technical field of demoulding of plastic products, and in particular to a balanced unilateral force-bearing thread-removing mechanism on a slide block. Background Art

[0002] For some plastic parts with special structures or materials, such as automotive plastic parts, such as plastic parts with threads or soft plastic parts, forced demolding may be required. For example, forced demolding can be performed by utilizing the elastic deformation of the plastic parts, or high-temperature resistant rubber materials can be used as the core, and the plastic parts can be forcibly pushed out by a push rod after the mold is opened.

[0003] To demould a plastic product, a slider is generally required on the side of the plastic product for core pulling, and the mouth has five turns of internal threads, and the thread core pulling distance is relatively large. Therefore, technicians in this field provide a balanced unilateral force thread stripping mechanism on a slider to solve the problems raised in the above background technology. Summary of the invention

[0004] The purpose of the present invention is to solve the disadvantage of the prior art that the thread core pulling distance is relatively large, and to propose a balanced single-side force thread stripping mechanism on a slider.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: comprising a bottom plate and a sliding seat located and slidably disposed on the bottom plate, wherein a clamping member for fixing a plastic product is disposed on the bottom plate; further comprising a slider connected and fixed to the sliding seat and slidably matched with the bottom plate, wherein a threaded core matched with the plastic product is threadedly rotated on the slider, and a slider insert inserted into the plastic product is rotatably connected to the end of the threaded core, wherein a first hydraulic cylinder is fixedly connected to the slider, and a plurality of racks are fixedly connected to the output shaft of the first hydraulic cylinder, and a gear mechanism is disposed between the rack and the threaded core, and a second hydraulic cylinder is fixedly connected to the end of the bottom plate, and the output shaft of the second hydraulic cylinder is connected to the slider; The movable rack rotates the thread core through the gear mechanism to complete the thread removal action of the plastic product.

[0006] Through the above technical solution, after the injection molding of the plastic product is completed, the thread core is first rotated to complete the thread removal action of the plastic product, and finally the core of the plastic product is pulled out.

[0007] Furthermore, the gear mechanism includes two staggered first gears rotating in the sliding seat, and a second gear and a third gear are fixedly connected to the central axes of the two first gears respectively, the third gear is meshed with one of the first gears, and a gear cylinder meshed with the first gear is provided at the end of the threaded core away from the plastic product, one of the racks is meshed with the second gear, and a matching gear meshed with the other rack is provided in the sliding seat.

[0008] Through the above technical solution, the threaded core is rotated by the cooperation of the gears and separated from the plastic product.

[0009] Furthermore, the gear mechanism also includes a movable sleeve and two symmetrically distributed toggle plates, one end of the toggle plate is pressed against the limit rings on the plastic product and the threaded core respectively, and a synchronization part is provided between the other end and the movable sleeve. The first gear is provided with a movable part that drives the movable sleeve to move, thereby rotating the two toggle plates to facilitate the separation of the plastic product and the threaded core.

[0010] Through the above technical solution, when the threaded core is separated from the plastic product, the push and pressure provided by the toggle plate further facilitates the separation.

[0011] Furthermore, the synchronizer comprises two connecting gears which are connected and fixed to the other end of the toggle plate, a connecting plate is fixedly connected to the side of the movable sleeve, and the connecting gears are rotatably connected to the connecting plate.

[0012] Through the above technical solution, the two toggle plates can rotate in the same amplitude, stably pushing the threaded core and the plastic product, making it easy to disassemble.

[0013] Furthermore, the movable part includes a movable plate and an insertion rod connected to the edge of the first gear, the movable plate is plugged and rotated with the insertion rod, the other end of the movable plate is rotatably connected to a connecting plate, the bottom of the connecting plate is fixedly connected to a sleeve rod that slides with the movable sleeve, the other end of the sleeve rod is hung with an elastic puller in the sliding seat, and the connecting plate is provided with a limiter to ensure smooth movement of the sleeve rod and the connecting plate.

[0014] Through the above technical solution, in coordination with the self-rotation of the first gear, the toggle plate is synchronously driven to separate the threaded core and the plastic product.

[0015] Furthermore, the limiting member includes a limiting rod connected and fixed inside the sliding seat, the limiting rod is movably plugged with the connecting plate, and the vertical cross-section of the limiting rod is rectangular.

[0016] The above technical solution ensures the horizontal and stable activity adjustment of the toggle plate.

[0017] Furthermore, the connecting plate is provided with a plurality of plug-in holes, and the other end of the movable plate is plug-fitted with the plug-in holes via a plug-in rod.

[0018] The above technical solution makes it easy to adjust the movable distance of the toggle plate and adjust the separation distance between the threaded core and the plastic product.

[0019] Furthermore, a bronze sleeve is provided on the threaded core.

[0020] Through the above technical solution, the protection of the threaded core is increased.

[0021] The end of the gear cylinder is fixedly connected to a limiting plate, and the threaded core is provided with a limiting groove that is slidably matched with the limiting plate to ensure synchronous rotation of the threaded core and the gear cylinder.

[0022] The present invention has the following beneficial effects: After the injection molding of the plastic product is completed, the first hydraulic cylinder moves forward, driving the two racks to move, and the thread core rotates through the cooperation of the rack and the gear mechanism, completing the thread removal action of the plastic product; After the plastic product is stripped of its threads, the second hydraulic cylinder is started again, driving the slider, the slide block, the thread core and the entire gear assembly to move, completing the core pulling of the plastic product; The structure balances the forces of the first hydraulic cylinder and the second hydraulic cylinder during the ejection process by designing auxiliary racks and auxiliary gears on the slider, so that the forces of the rack and gear mechanisms of the first hydraulic cylinder and the second hydraulic cylinder are balanced during the ejection process, thereby realizing stable operation of the thread stripping mechanism and enabling smooth and reliable production of the mold. The core pulling distance of this solution is small, and the thread stripping operation is stable and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the split structure of the sliding seat and the floor of the present invention; Figure 3 It is a schematic diagram of the split structure of the slider seat and the bottom plate of the present invention; Figure 4 It is a schematic diagram of the split structure of the slider and the bottom plate of the present invention; Figure 5 It is a schematic diagram of the matching structure of the slider and the gear mechanism of the present invention; Figure 6 It is a schematic diagram of the split structure of the slider and the gear mechanism of the present invention; Figure 7 It is a schematic diagram of the disassembled structure of the threaded core, the plastic product and the gear mechanism of the present invention; Figure 8 It is a schematic diagram of the structure of the movable part and the limiting part of the present invention; Fig. 9 It is a schematic diagram of the matching structure of the limiting groove and the limiting plate of the present invention.

[0024] Legend: 1. Bottom plate; 2. Sliding seat; 3. Slider; 4. Threaded core; 5. Slider insert; 6. First hydraulic cylinder; 7. Rack; 8. Second hydraulic cylinder; 9. First gear; 10. Second gear; 11. Third gear; 12. Gear barrel; 13. Movable sleeve; 14. Toggle plate; 15. Connecting gear; 16. Connecting plate; 17. Movable plate; 18. Insert rod; 19. Connecting plate; 20. Sleeve rod; 21. Elastic puller; 22. Limit rod; 23. Plug-in hole; 24. Clamp; 25. Limit plate; 26. Limit groove; 27. Avoidance hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Reference Figure 1-Figure 9 , an embodiment provided by the present invention includes a bottom plate 1 and a sliding seat 2 sliding on the bottom plate 1, a clamping member 24 for fixing a plastic product is provided on the bottom plate 1; and further includes: a slider 3 connected and fixed to the sliding seat 2 and slidingly matched with the bottom plate 1, a threaded core 4 matching with the plastic product is threadedly rotated on the slider 3, a slider insert 5 inserted into the plastic product is rotatably connected at the end of the threaded core 4, a first hydraulic cylinder 6 is fixedly connected to the slider 3, a plurality of racks 7 are fixedly connected to the output shaft of the first hydraulic cylinder 6, a gear mechanism is provided between the rack 7 and the threaded core 4, a second hydraulic cylinder 8 is fixedly connected to the end of the bottom plate 1, and the output shaft of the second hydraulic cylinder 8 is connected to the slider 3; The movable rack 7 rotates the thread core 4 through the gear mechanism to complete the thread removal action of the plastic product; After the injection molding of the plastic product is completed, the first hydraulic cylinder 6 moves forward, driving the two racks 7 to move. Through the cooperation of the racks 7 and the gear mechanism, the thread core 4 rotates to complete the thread removal action of the plastic product; After the thread removal of the plastic product is completed, the second hydraulic cylinder 8 is started again to drive the slider 2, the slider 3, the thread core 4 and the entire gear assembly to move, thereby completing the core pulling of the plastic product.

[0027] Preferably: the gear mechanism includes two staggered first gears 9 rotating in the slide seat 2, the middle axes of the two first gears 9 are respectively fixedly connected with a second gear 10 and a third gear 11, the third gear 11 is meshed with one of the first gears 9, the end of the threaded core 4 away from the plastic product is provided with a gear barrel 12 meshed with the first gear 9, one of the racks 7 is meshed with the second gear 10, and a matching gear meshed with another rack 7 is provided in the slide seat 2. After the injection molding of the plastic product is completed, the output shaft of the first hydraulic cylinder 6 is extended to move the rack 7, the rack 7 contacts the second gear 10, and the first gear 9 is rotated, driving the gear barrel 12 to rotate, thereby rotating the threaded core 4, completing the threading mechanism of the threaded core 4 and the plastic product; According to actual measurements, the rack 7 moves 280 mm, and through the gear mechanism, the thread core 4 rotates six times, thereby disengaging the thread glue position feature, and the second hydraulic cylinder 8 drives the slider 3, the rack 7 and the entire gear mechanism to pull the core 175 mm.

[0028] Preferably: the gear mechanism further comprises a movable sleeve 13 and two symmetrically distributed toggle plates 14, one end of the toggle plate 14 is respectively pressed against the limit rings on the plastic product and the threaded core 4, and a synchronization member is arranged between the other end and the movable sleeve 13, and the first gear 9 is provided with a movable member that drives the movable sleeve 13 to move, so that the two toggle plates 14 rotate, so as to facilitate the separation of the plastic product and the threaded core 4 from each other. When the first gear 9 rotates, the movable sleeve 13 is moved toward the threaded core 4 through the movable member, so that the two toggle plates 14 are respectively pressed against the limit rings on the plastic product and the threaded core 4, and the movable sleeve 13 moves along the sleeve rod 20, and under the support of the rotation of the toggle plate 14, the plastic product and the threaded core 4 are separated from each other; The shifting plate 14 always keeps an inclined state relative to the movable sleeve 13 .

[0029] Preferably: the synchronizer includes two connecting gears 15 connected and fixed to the other end of the toggle plate 14, a connecting plate 16 is fixedly connected to the side of the movable sleeve 13, the connecting gears 15 are rotatably connected to the connecting plate 16, and the two connecting gears 15 are meshed with each other. When one toggle plate 14 rotates, the other toggle plate 14 rotates at the same time, the rotation amplitude is consistent, and the rotation directions of the two toggle plates 14 are opposite.

[0030] Preferably: the movable part includes a movable plate 17 and an insertion rod 18 connected to the edge of the first gear 9, the movable plate 17 and the insertion rod 18 are plugged and rotated, and the other end of the movable plate 17 is rotatably connected to a connecting plate 19, and the bottom of the connecting plate 19 is fixedly connected to a sleeve rod 20 that slides with the movable sleeve 13, and the other end of the sleeve rod 20 is hung with an elastic puller 21 in the sliding seat 2, and the connecting plate 19 is provided with a limiter to ensure that the sleeve rod 20 and the connecting plate 19 move smoothly. Through the rotation of the first gear 9, one end of the movable plate 17 is driven to make a circular motion, and the other end of the movable plate 17 is limited by the limiter, and drives the movable sleeve 13 and the sleeve rod 20 to horizontally approach the threaded core 4, so as to facilitate the separation of the threaded core 4 and the plastic product; The movable sleeve 13 is provided with an avoidance hole 27 , which facilitates the connecting plate 19 to pass through the avoidance hole 27 , thereby ensuring that the movable sleeve 13 can move on the sleeve rod 20 .

[0031] Preferably: the limiting member includes a limiting rod 22 connected and fixed to the sliding seat 2, the limiting rod 22 is movably plugged into the connecting plate 19, the vertical cross-section of the limiting rod 22 is rectangular, and the movement direction of the connecting plate 19 and the sleeve rod 20 is limited by the fixed limiting rod 22, so that the connecting plate 19 and the sleeve rod 20 can only make stable movements in the horizontal direction close to the threaded core 4.

[0032] Preferably: a plurality of plug holes 23 are provided on the connecting plate 19, and the other end of the movable plate 17 is plugged into the plug hole 23 through a plug rod. By replacing the plug hole 23, the position of the connection point between the other end of the movable plate 17 and the connecting plate 19 is changed, thereby changing the amplitude of the sleeve rod 20 close to the threaded core 4, which is convenient for adjusting and supporting the separation of the threaded core 4 and the plastic product.

[0033] Preferably: a bronze sleeve is provided on the threaded core 4 , and the bronze sleeve mainly plays the role of supporting and protecting the threaded core 4 .

[0034] The distance between the movable plate 17 and the first gear 9 is greater than the connecting rod at the center axis of the first gear 9 to ensure that when the first gear 9 rotates, the connecting rod at the center axis of the first gear 9 touches the movable plate 17 to affect the movement of the movable plate 17.

[0035] Preferably: the end of the gear cylinder 12 is fixedly connected to the limit plate 25, and the threaded core 4 is provided with a limit groove 26 that slides with the limit plate 25. The gear cylinder 12 rotates at the original position in the sliding seat 2. The rotation of the gear cylinder 12 drives the threaded core 4 to rotate, and does not affect the threaded core 4 from entering the slider 3.

[0036] Working principle: After the injection molding of the plastic product is completed, the first hydraulic cylinder 6 is started, and the output shaft of the first hydraulic cylinder 6 is extended, driving the two racks 7 to move, and the moving racks 7 contact the second gear 10, so that the second gear 10 rotates, so that the two first gears 9 and the third gear 11 rotate synchronously, and the rotating first gear 9 drives the gear barrel 12 to rotate, so that the thread core 4 rotates, and the thread core 4 rotates in the slider 3, so that the thread core 4 is away from the plastic product, completing the thread removal action of the plastic product; When the first gear 9 rotates, it drives the insertion rod 18 to make a circular motion, so that one end of the movable plate 17 makes a circular motion. Due to the limiting effect of the limiting rod 22, the connecting plate 19 can only make a horizontal motion in the direction of approaching or moving away from the thread core 4. Under this restriction, the other end of the movable plate 17 moves in the horizontal direction, so that the connecting plate 19 and the sleeve rod 20 make a reciprocating motion relative to the thread core 4, that is, the sleeve rod 20 reciprocates to approach and move away from the thread core 4, and the movable sleeve 13 reciprocates to approach and move away from the thread core 4 synchronously, thereby driving the two toggle plates 14 to move. Due to the effect of the connecting gear 15, The rotation amplitude of the two toggle plates 14 is always consistent. When the two inclined toggle plates 14 approach the threaded core 4, one toggle plate 14 contacts the limit ring on the threaded core 4, and the other toggle plate 14 contacts the plastic product. The movable sleeve 13 continues to approach the threaded core 4, so that the two toggle rings rotate, thereby pressing the threaded core 4 and the plastic product, so that the threaded core 4 and the plastic product are separated from each other. Since the position of the plastic product is fixed, the movable sleeve 13 overcomes the effect of the elastic puller 21 and moves adaptively along the sleeve rod 20, so that the threaded core 4 is separated from the threaded core 4, and the thread is removed. After the plastic product is unthreaded, the second hydraulic cylinder 8 is started again, and the output shaft of the second hydraulic cylinder 8 is extended and retracted, driving the slider 2, the slider 3, the threaded core 4 and the entire gear assembly to move, so that the slider insert 5 is away from the plastic product, and the core pulling of the plastic product is completed.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A balanced unilateral force stripping mechanism on a slider, comprising: A bottom plate (1) and a sliding seat (2) located on the bottom plate (1) and sliding on the bottom plate (1); a clamping member (24) for fixing the plastic product is provided on the bottom plate (1); It is characterized by further comprising: A slider (3) is connected and fixed to the sliding seat (2) and slidably matched with the base plate (1); a threaded core (4) matched with the plastic product is rotatably connected to the slider (3); the end of the threaded core (4) is rotatably connected to a slider insert (5) inserted into the plastic product; a first hydraulic cylinder (6) is fixedly connected to the slider (3); the output shaft of the first hydraulic cylinder (6) is fixedly connected to multiple groups of racks (7); a gear mechanism is provided between the racks (7) and the threaded core (4); a second hydraulic cylinder (8) is fixedly connected to the end of the base plate (1); the output shaft of the second hydraulic cylinder (8) is connected to the slider (3); The movable rack (7) causes the threaded core (4) to rotate via the gear mechanism, thereby completing the thread removal action of the plastic product.

2. A balanced single-side force-bearing thread-removing mechanism on a slider according to claim 1, characterized in that: The gear mechanism comprises two staggered first gears (9) rotating in the slide seat (2), the central axes of the two first gears (9) being respectively fixedly connected with a second gear (10) and a third gear (11), the third gear (11) being meshed with one of the first gears (9), a gear cylinder (12) being meshed with the first gear (9) being provided at one end of the threaded core (4) away from the plastic product, one of the racks (7) being meshed with the second gear (10), and a matching gear being meshed with the other rack (7) being provided in the slide seat (2).

3. A balanced single-side force-bearing thread-removing mechanism on a slider according to claim 2, characterized in that: The gear mechanism further comprises a movable sleeve (13) and two symmetrically distributed toggle plates (14), one end of the toggle plates (14) respectively press-fitting against limit rings on the plastic product and the threaded core (4), and a synchronizing member is provided between the other end and the movable sleeve (13). The first gear (9) is provided with a movable member for driving the movable sleeve (13) to move, thereby rotating the two toggle plates (14) to facilitate the separation of the plastic product and the threaded core (4).

4. A balanced single-side force-bearing thread-removing mechanism on a slider according to claim 3, characterized in that: The synchronizing member comprises two connecting gears (15) connected and fixed to the other end of the toggle plate (14); a connecting plate (16) is fixedly connected to the side of the movable sleeve (13); and the connecting gears (15) are rotatably connected to the connecting plate (16).

5. The balanced single-side force-bearing thread-removing mechanism on a slider according to claim 3, characterized in that: The movable member comprises a movable plate (17) and an insertion rod (18) connected to the edge of the first gear (9); the movable plate (17) and the insertion rod (18) are plugged and rotated; the other end of the movable plate (17) is rotatably connected to a connecting plate (19); the bottom of the connecting plate (19) is fixedly connected to a sleeve rod (20) that slidably cooperates with the movable sleeve (13); the other end of the sleeve rod (20) is hung with an elastic puller (21) in the sliding seat (2); and the connecting plate (19) is provided with a limiter that ensures the sleeve rod (20) and the connecting plate (19) move smoothly.

6. A balanced single-side force-bearing thread-removing mechanism on a slider according to claim 5, characterized in that: The limiting member comprises a limiting rod (22) connected and fixed inside the sliding seat (2), the limiting rod (22) being movably plugged into the connecting plate (19), and the vertical cross section of the limiting rod (22) is rectangular.

7. A balanced single-side force-bearing thread-removing mechanism on a slider according to claim 5, characterized in that: The connecting plate (19) is provided with a plurality of plug holes (23), and the other end of the movable plate (17) is plugged into and matched with the plug holes (23) via a plug rod.

8. The balanced single-side force-bearing thread-removing mechanism on a slider according to claim 1, characterized in that: The threaded core (4) is provided with a bronze sleeve.

9. A balanced single-side force-bearing thread-removing mechanism on a slider according to claim 2, characterized in that: The end of the gear cylinder (12) is fixedly connected to a limiting plate (25), and the threaded core (4) is provided with a limiting groove (26) that slidably cooperates with the limiting plate (25).

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