Tooth twisting die without rotation stopping structure

Abstract

The utility model relates to the technical field of twisted tooth molds, and discloses a twisted tooth mold without a rotation stopping structure, which comprises an upper fixing plate, a lower fixing plate is arranged right below the upper fixing plate, the upper fixing plate and the lower fixing plate are coaxially arranged in a mold closing state, and a sprue bush for feeding is fixedly mounted at the center of the top surface of the upper fixing plate in a penetrating manner and is vertically arranged. According to the utility model, after injection molding, the insert A is pushed by the oil cylinder, so that the insert A is opened at a distance of 37-38mm, and the insert A moves along with the opening of the rear mold under the action of the nylon pull buckle, so that the parting surface is not separated and closed, i.e., the thread twisting is started, and after the thread twisting is completed and the insert A completes the withdrawal of all the threads due to the enough retreating space, the oil cylinder is started to twitch outwards, and the insert A is pushed by the oil cylinder. And when the thread core is completely separated from the product, the mold is opened immediately, the equal-height screw on the upper mold is detached, so that the upper mold and the B insert are separated, the sliding block delay core-pulling assembly relieves limiting, and after mold opening is completed, the product is ejected out, and part taking is completed.

Description

Technical Field

[0001] This utility model relates to the field of coilover mold technology, specifically a coilover mold without an anti-rotation structure. Background Technology

[0002] A non-rotating threaded mold is a specially designed injection mold that incorporates threaded structures to precisely position and fix plastic parts. During injection molding, its unique threaded design firmly secures the plastic part, ensuring that it does not shift or deform during cooling, thus producing high-precision, high-quality products.

[0003] Currently, for products with cylindrical structures, the conventional approach is to perform thread tightening after mold opening. However, since this product has a cylindrical structure, if thread tightening is performed after mold opening, the product will rotate with the thread tightening core, making it impossible to complete the thread tightening of the product. This results in reduced product precision and may even damage the mold.

[0004] To overcome this problem, this invention provides a novel non-rotational threading mold that can complete the threading action before the mold opens, ensuring the stability and precision of the product during injection molding. This ingenious design is easy to operate and effectively reduces energy consumption and costs during production. Utility Model Content

[0005] The purpose of this invention is to provide a coiled tooth mold without an anti-rotation structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a non-rotating threaded die, comprising an upper fixed plate and a lower fixed plate directly below it, both coaxially arranged in a closed state. A sprue sleeve for feeding material is fixedly and continuously installed at the center of the top surface of the upper fixed plate, and the sprue sleeve is vertically arranged, with its upper end located in a placement hole at the top of the upper fixed plate. Two spacer plates are provided on the top surface of the lower fixed plate, and two ejector plates are provided between the two spacer plates. A positioning guide post is provided between the top of the plate and the bottom of the upper fixed plate, and a male template and a female template are provided on the positioning guide post. An upper mold and a B-insert are provided between the male template and the female template, and an equal-height screw is provided on the upper mold. An injection cavity is provided between the upper mold and the B-insert. A cylindrical product is placed in the injection cavity, and a runner is provided in the middle of the injection cavity. The outlet of the runner is connected to the inner cavity of the sprue bushing. An ejector pin is connected to the ejector plate. The ejector pin passes through the female template and the B-insert and contacts the cylindrical product.

[0007] A threaded transmission mechanism is provided on one side of the mother template, and a slider delay core-pulling assembly is provided on one side of the upper mold and B-insert.

[0008] Preferably, the auger transmission mechanism includes a mounting base installed on one side of the mother mold. A hydraulic cylinder connecting seat is fixedly installed on the top of the mounting base. A hydraulic cylinder is installed on one side of the hydraulic cylinder connecting seat. The output end of the hydraulic cylinder passes through the hydraulic cylinder connecting seat and extends to the other side of the hydraulic cylinder connecting seat, and is fixedly connected to an A-shaped insert. The A-shaped insert is T-shaped, and a gear mounting seat is adapted to be provided on the outer surface of the A-shaped insert. A certain distance is provided between the A-shaped insert and the gear mounting seat. Limiting plates are provided on both sides of the gear mounting seat. A limiting guide post is fixedly connected to one side of the gear mounting seat. The other end of the limiting guide post movably passes through the hydraulic cylinder connecting seat and extends to the outside. A compression spring is sleeved on the outer wall of the limiting guide post. The function of the compression spring is to ensure the stability of the gear mounting seat during movement and to effectively absorb the impact force generated by the movement of the hydraulic cylinder, reducing damage to the mold. One end of the compression spring is fixedly connected to the end of the limiting guide post, and the other end of the compression spring is fixedly connected to the hydraulic cylinder connecting seat.

[0009] Preferably, the coilover transmission mechanism further includes a transmission motor, the output shaft of which passes through the mounting base, and a transmission gear one is fixedly connected to the output shaft end of the transmission motor. A transmission gear two is meshed with the top of the transmission gear one, and two transmission gears three are meshed with the top of the transmission gear two. A coilover shaft is fixed in the shaft hole of the transmission gear three, and a tooth core is connected to the other end of the coilover shaft. The end of the tooth core is located inside the cylindrical product. The transmission gear two and the two transmission gears three are all installed in the gear mounting base.

[0010] Preferably, the slider delay core-pulling assembly includes a stop plate, two positioning rods are fixedly connected to one side of the stop plate for positioning cylindrical products, a slider seat is installed on the other side of the stop plate, and limit blocks are provided on both sides of the slider seat. An inclined guide post is provided on the slider seat.

[0011] This utility model provides a retractable thread mold without an anti-rotation structure. It has the following beneficial effects:

[0012] (1) This utility model drives a transmission motor to drive a transmission gear one, which drives a transmission gear two, which drives a transmission gear three, which in turn drives a swivel shaft. The swivel shaft drives the tooth core to perform internal swivel action on the cylindrical product, thereby improving the precision and stability of the product. Through a series of gear transmissions, the efficient and precise drive of the swivel shaft is achieved, ensuring the stability and precision of the swivel mold when processing plastic products.

[0013] (2) In this utility model, when the mold opens, the inclined guide post moves in the mold opening direction, the slider seat moves backward under the action of the inclined guide post, and the stop plate moves backward at the same time, so that the positioning stop rod disengages from the cylindrical product, completing the core pulling action. At this time, the stop plate of the slider delay core pulling assembly begins to play its role, ensuring the accurate positioning of the product during the transfer process. After the positioning stop rod disengages, the stop plate automatically returns to its original position through the spring device to facilitate the smooth progress of the next action.

[0014] (3) After injection molding, the present invention first uses a hydraulic cylinder to push the A insert, so that the A insert opens by 37-38mm. At this time, due to the action of the nylon buckle, the A insert moves with the opening of the mold, so that the parting surface does not separate and closes, that is, the toothing begins. After the toothing is completed, the A insert leaves enough space to withdraw all the teeth. Then the hydraulic cylinder is started to pull it out until the tooth core is completely separated from the product. Then the mold is opened and the equal height screw on the upper mold is removed, so that the upper mold and the B insert are separated. The slider delay core pulling component is released from the limit. After the mold is opened, the product is ejected and the part is removed. This invention realizes a product without obvious anti-rotation dependence, reduces mold cost and simplifies mold structure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the coilover transmission mechanism of this utility model;

[0017] Figure 3 This is a view of the slider delay core-pulling component of this utility model.

[0018] In the diagram: Upper fixed plate 21, Lower fixed plate 22, Male template 23, Female template 24, Spare plate 25, Ejector plate 26, Upper mold 27, B insert 28, Runner 29, Cylindrical product 210, Twisted thread transmission mechanism 3, Mounting seat 31, Hydraulic cylinder connecting seat 32, Hydraulic cylinder 33, A insert 34, Gear mounting seat 35, Limiting plate 36, Limiting guide post 37, Compression spring 38, Transmission motor 39, Transmission gear one 310, Transmission gear two 311, Transmission gear three 312, Tooth core 313, Slider delay core pulling assembly 4, Stop plate 41, Positioning stop rod 42, Slider seat 43, Limiting block 44, Inclined guide post 45. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] Example 1:

[0022] A preferred embodiment of the non-rotational coiled die provided by this utility model is as follows: Figure 1-3 As shown: A non-rotational threaded die includes an upper fixed plate 21 and a lower fixed plate 22 directly below it. The two are coaxially arranged in a closed state. A sprue bushing for feeding material is fixedly and continuously installed at the center of the top surface of the upper fixed plate 21. The sprue bushing is vertically arranged, and its upper end is located in a placement hole at the top of the upper fixed plate 21. Two partition plates 25 are provided on the top surface of the lower fixed plate 22, and two ejector plates 26 are provided between the two partition plates 25. A positioning guide post is provided between the top of the two partition plates 25 and the bottom of the upper fixed plate 21. A male mold plate 23 and a female mold plate 24 are provided on the positioning guide post. An upper mold 27 and a B insert are provided between the male mold plate 23 and the female mold plate 24. 28. The upper mold 27 is equipped with equal-height screws. An injection cavity is set between the upper mold 27 and the B-insert 28. The cylindrical product 210 formed is placed in the injection cavity. A runner 29 is set in the middle of the injection cavity. The outlet of the runner 29 is connected to the inner cavity of the sprue bushing. An ejector pin is connected to the ejector plate 26. The ejector pin passes through the mother mold 24 and the B-insert 28 and contacts the cylindrical product 210. An elastic ejector pin seat is set below the ejector plate 26 to ensure that the ejector pin has a stable pushing force during the ejection process and reduce scratches and deformation when the product is ejected. At the same time, through the optimized design of the runner 29 structure, more uniform injection filling is achieved, which improves the internal quality and appearance of the cylindrical product 210.

[0023] A threaded transmission mechanism 3 is provided on one side of the mother template 24, and a slider delay core-pulling assembly 4 is provided on one side of the upper mold 27 and B insert 28.

[0024] The coilover transmission mechanism 3 includes a mounting base 31 installed on one side of the mother template 24. A cylinder connecting seat 32 is fixedly installed on the top of the mounting base 31. A cylinder 33 is installed on one side of the cylinder connecting seat 32. The output end of the cylinder 33 passes through the cylinder connecting seat 32 and extends to the other side of the cylinder connecting seat 32, and is fixedly connected to an A-mount 34. The A-mount 34 is T-shaped, and a gear mounting seat 35 is adapted to fit the outer surface of the A-mount 34. A certain distance is provided between the A-mount 34 and the gear mounting seat 35. The gear mounting seat 35 has gears on both sides. A limiting plate 36 is provided. A limiting guide post 37 is fixedly connected to one side of the gear mounting seat 35. The other end of the limiting guide post 37 movably passes through the hydraulic cylinder connecting seat 32 and extends to the outside. A compression spring 38 is sleeved on the outer wall of the limiting guide post 37. The function of the compression spring 38 is to ensure the stability of the gear mounting seat 35 during movement and to effectively absorb the impact force generated by the movement of the hydraulic cylinder 33, thereby reducing damage to the mold. One end of the compression spring 38 is fixedly connected to the end of the limiting guide post 37, and the other end of the compression spring 38 is fixedly connected to the hydraulic cylinder connecting seat 32.

[0025] The coilover transmission mechanism 3 also includes a transmission motor 39. The output shaft of the transmission motor 39 passes through the mounting base 31, and a transmission gear 310 is fixedly connected to the output shaft end of the transmission motor 39. A transmission gear 311 is meshed with the top of the transmission gear 310. Two transmission gears 312 are meshed with the top of the transmission gear 311. A coilover shaft is fixed in the shaft hole of the transmission gear 312. A tooth core 313 is connected to the other end of the coilover shaft, and the end of the tooth core 313 is located inside the cylindrical product 210. The transmission gear 311 and the two transmission gears 312 are all installed in the gear mounting base 35.

[0026] The transmission motor 39 drives the transmission gear 310, which in turn drives the transmission gear 311, which in turn drives the transmission gear 312. The transmission gear 312 then drives the auger shaft, which in turn drives the tooth core 313 to perform internal augering on the cylindrical product 210. This improves the precision and stability of the product. Through a series of gear transmissions, the auger shaft is driven efficiently and precisely, ensuring the stability and precision of the auger mold when processing plastic products.

[0027] Example 2:

[0028] Please see Figures 1-3 Furthermore, based on Embodiment 1, the following is obtained: the slider delay core-pulling assembly 4 includes a stop plate 41, two positioning stop rods 42 are fixedly connected to one side of the stop plate 41 for positioning the cylindrical product 210, a slider seat 43 is installed on the other side of the stop plate 41, and limit blocks 44 are provided on both sides of the slider seat 43, and inclined guide posts 45 are provided on the slider seat 43.

[0029] In this embodiment, when the mold opens, the inclined guide post 45 moves in the mold opening direction, and the slider seat 43 moves backward under the action of the inclined guide post 45. At the same time, the stop plate 41 moves backward, causing the positioning stop rod 42 to disengage from the cylindrical product 210, completing the core pulling action. At this time, the stop plate 41 of the slider delay core pulling assembly 4 begins to function, ensuring the accurate positioning of the product 210 during the transfer process. After the positioning stop rod 42 disengages, the stop plate 41 automatically returns to its original position through the spring device to facilitate the smooth progress of the next action.

[0030] During use, after injection molding, the hydraulic cylinder 33 is used to push the A insert 34, making the A insert 34 open by 37-38mm. At this time, due to the action of the nylon buckle, the A insert 34 moves with the opening of the rear mold, so that the parting surface does not separate and is in a closed state, that is, the threading begins. After the threading is completed, the A insert 34 leaves enough space to complete the withdrawal of all the threads. Then, the hydraulic cylinder 33 is started to pull outward until the thread core 313 is completely separated from the product. Then the mold is opened, the equal height screw on the upper mold 27 is removed, so that the upper mold 27 and the B insert 28 are separated. The slider delay core pulling assembly 4 is released from the limit. After the mold is opened, the product is ejected and the part is removed.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A coiled thread mold without an anti-rotation structure, comprising an upper fixed plate (21) and a lower fixed plate (22) disposed directly below it, the two being coaxially arranged in a closed mold state, characterized in that, A sprue sleeve for feeding is fixedly installed through the center of the top surface of the upper fixed plate (21), and the sprue sleeve is vertically set. The upper end of the sprue sleeve is located in the placement hole at the top of the upper fixed plate (21). Two spacer plates (25) are provided on the top surface of the lower fixed plate (22), and two ejector plates (26) are provided between the two spacer plates (25). A positioning guide post is provided between the top of the two spacer plates (25) and the bottom of the upper fixed plate (21), and a male template (23) and a female template (24) are provided on the positioning guide post. An upper mold (27) and a B-insert (28) are provided between the male mold (23) and the female mold (24). The upper mold (27) is provided with equal-height screws. An injection cavity is provided between the upper mold (27) and the B-insert (28). A cylindrical product (210) is formed inside the injection cavity. A runner (29) is provided at the middle position of the injection cavity. The outlet of the runner (29) is connected to the inner cavity of the sprue bushing. An ejector pin is connected to the ejector plate (26). The ejector pin passes through the female mold (24) and the B-insert (28) and contacts the cylindrical product (210). A threaded transmission mechanism (3) is provided on one side of the mother template (24), and a slider delay core-pulling assembly (4) is provided on one side of the upper mold (27) and B insert (28).

2. The non-rotational locking die according to claim 1, characterized in that: The coilover transmission mechanism (3) includes a mounting base (31) installed on one side of the mother template (24). A cylinder connecting seat (32) is fixedly installed on the top of the mounting base (31). A cylinder (33) is installed on one side of the cylinder connecting seat (32). The output end of the cylinder (33) passes through the cylinder connecting seat (32) and extends to the other side of the cylinder connecting seat (32), and is fixedly connected to an A-mount (34). The A-mount (34) is T-shaped, and a gear mounting seat (35) is adapted to fit the outer surface of the A-mount (34). A certain distance is provided between the A-mount (34) and the gear mounting seat (35). Limiting plates (36) are provided on both sides of the gear mounting base (35). A limiting guide post (37) is fixedly connected to one side of the gear mounting base (35). The other end of the limiting guide post (37) movably passes through the cylinder connecting seat (32) and extends to the outside. A compression spring (38) is sleeved on the outer wall of the limiting guide post (37). The function of the compression spring (38) is to ensure the stability of the gear mounting base (35) during movement and to effectively absorb the impact force generated by the movement of the cylinder (33) to reduce damage to the mold. One end of the compression spring (38) is fixedly connected to the end of the limiting guide post (37), and the other end of the compression spring (38) is fixedly connected to the cylinder connecting seat (32).

3. The non-rotational locking die according to claim 1, characterized in that: The coilover transmission mechanism (3) also includes a transmission motor (39). The output shaft of the transmission motor (39) passes through the mounting base (31), and the output shaft end of the transmission motor (39) is fixedly connected to a first transmission gear (310). The top of the first transmission gear (310) is meshed with a second transmission gear (311), and the top of the second transmission gear (311) is meshed with two third transmission gears (312). The shaft hole of the third transmission gear (312) is fixed with a coilover shaft, and the other end of the coilover shaft is connected to a tooth core (313). The end of the tooth core (313) is located inside the cylindrical product (210). The second transmission gear (311) and the two third transmission gears (312) are all installed in the gear mounting base (35).

4. A non-rotational locking die according to claim 1, characterized in that: The slider delay core-pulling assembly (4) includes a stop plate (41). Two positioning rods (42) are fixedly connected to one side of the stop plate (41) for positioning the cylindrical product (210). A slider seat (43) is installed on the other side of the stop plate (41), and limit blocks (44) are provided on both sides of the slider seat (43). An inclined guide post (45) is provided on the slider seat (43).

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