Spring and roller replaceable type side core-pulling mechanism of medical equipment shell injection mold
The spring roller replaceable side core pulling mechanism solves the problems of injection mold wear and low production efficiency, and achieves wear resistance, low-cost replacement and efficient production of core pulling parts.
Patent Information
- Application Number
- CN202422587167.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The inclined guide pins and inclined guide holes of existing injection molds are easily worn, have a short service life, and have high replacement costs for consumable parts. In addition, the horizontal arrangement of the oil cylinder takes up space, resulting in low production efficiency.
It adopts a spring roller replaceable side core pulling mechanism, including a core pulling rod, a push rod and an elastic rubber part. The roller cooperates with the push rod head to reduce wear, and the elastic rubber part pushes the core pulling rod to reset to ensure mold accuracy. The core pulling part can be separated and replaced.
It extends the service life of the core-pulling parts, reduces the cost of replacing consumable parts, improves production efficiency and the convenience of replacement, and ensures the processing accuracy of the mold.
Smart Images
Figure CN223302139U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an injection mold, in particular to a spring roller replaceable side core pulling mechanism of an injection mold for a medical device shell. Background Art
[0002] When using an injection mold to produce a plastic product, if the side wall of the plastic product is provided with a side hole, the prior art generally involves providing an inclined guide post in the fixed mold plate of the injection mold and providing a side core-pulling slider on the movable mold plate on the side of the side hole of the plastic product. One side of the side core-pulling slider cooperates with the side hole, and an inclined guide hole is provided in the side core-pulling slider. When the mold is opened, the inclined guide hole cooperates with the inclined guide post to drive the side core-pulling slider to withdraw from the side hole. The inclined guide post and the inclined guide hole structure are prone to wear, and their service life is short, especially for injection molds that operate continuously for a long time. Once the inclined guide post and the inner wall of the inclined guide hole are worn, the processing accuracy is affected, and therefore they need to be replaced frequently, which is costly and troublesome to replace consumable parts. Alternatively, some people have designed to provide an oil cylinder in the side wall of the movable mold plate, with the piston rod of the oil cylinder connected to the side core-pulling slider. However, this structure has the following disadvantages: the oil cylinder needs to be arranged horizontally, occupying the lateral space of the mold, resulting in an increase in the mold volume. Before the mold is opened, the core must be pulled by the oil cylinder before the mold can be opened. The core pulling action takes up the mold opening time, resulting in reduced production efficiency. Summary of the Invention
[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a medical equipment housing injection mold with a spring roller replaceable side core pulling mechanism that is wear-resistant, has a long service life, reduces the cost of replacing consumables, improves production efficiency, and is convenient for replacing consumables.
[0004] The technical solution of the spring roller replaceable side core pulling mechanism of the injection mold of the medical device shell of the utility model is as follows: it comprises an upper double plate and a lower double plate, a fixed template is arranged under the upper double plate, a perforation is provided in the lower double plate, a mold foot is provided on the lower double plate, an upper ejector plate, a lower ejector plate and an ejector are provided on the lower double plate between the mold feet, a ejector rod of the injection molding machine passes through the perforation and cooperates with the lower ejector plate, a movable template is provided on the mold foot, a mold cavity is formed between the movable template and the fixed template, an injection-molded medical device shell is arranged in the mold cavity, a side hole is provided on one side of the medical device shell, and the fixed template is provided. A fixed block is provided on the side wall of the template, a roller is provided in the fixed block, and the roller is rotatably connected to the fixed block via a rotating shaft. An elastic core-pulling assembly is provided on the movable template, and the elastic core-pulling assembly includes a fixed seat, a slide groove is provided in the fixed seat, a core-pulling piece is provided in the slide groove, a spring is provided on the outer wall of the core-pulling piece close to the medical equipment housing, one end of the spring contacts the inner wall of the fixed seat, and the other end of the spring contacts the core-pulling piece, one end of the core-pulling piece passes through the fixed seat and cooperates with the side hole of the medical equipment housing, and the other end of the core-pulling piece passes through the fixed seat and cooperates with the roller.
[0005] Furthermore, the core-pulling component includes a core-pulling rod and a push rod, one end of the core-pulling rod passes through the fixed seat and cooperates with the side hole of the medical device housing, the other end of the core-pulling rod is provided with a first baffle, the spring is sleeved on the outer wall of the core-pulling rod, one end of the spring contacts the inner wall of the fixed seat, and the other end of the spring contacts the first baffle, one end of the push rod is provided with a second baffle, the second baffle corresponds to the first baffle, and the other end of the push rod passes through the fixed seat and cooperates with the roller.
[0006] Furthermore, an elastic rubber piece is provided between the core-pulling rod and the push rod.
[0007] Furthermore, the fixing seat is fixed to the movable template via a fastener, a first positioning hole is opened at the bottom of the fixing seat, a first positioning pin is set in the movable template, and the first positioning pin cooperates with the first positioning hole.
[0008] Furthermore, the end of the push rod away from the second baffle is an arc-shaped head.
[0009] Furthermore, a second positioning hole is provided in the fixing block, and a second positioning pin is provided on the side wall of the fixed template, and the second positioning pin cooperates with the second positioning hole.
[0010] The beneficial effects of the spring roller replaceable side core pulling mechanism of the injection mold for the medical device shell of the utility model are: 1. The roller is used to cooperate with the push rod head of the core pulling part to reduce wear, effectively increase the service life of the core pulling part, and reduce the cost of replacing consumable parts; 2. The core pulling part is divided into a core pulling rod and a push rod, and an elastic rubber part is provided between the core pulling rod and the push rod. After the end of the core pulling rod is worn, the elasticity of the elastic rubber part is used to push the core pulling rod, so that the core pulling rod can always maintain contact with the side wall of the movable template when the mold is closed and reset, thereby ensuring the accuracy of the mold and increasing the service life of the core pulling rod; 3. The fixed seat, the core pulling part, and the spring are combined into an elastic core pulling assembly. Since the various components of the elastic core pulling assembly are consumable parts, the entire elastic core pulling assembly can be replaced after wear, and the replacement is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the mold-closing structure of the spring roller replaceable side core-pulling mechanism of the utility model injection mold for medical device housing;
[0012] Figure 2 This is a schematic structural diagram of the mold opening and core pulling state of the spring roller replaceable side core pulling mechanism of the medical device housing injection mold of the utility model;
[0013] Figure 3 This is a schematic structural diagram of the ejection state of the medical device housing of the utility model medical device housing injection mold with a spring roller replaceable side core pulling mechanism;
[0014] Figure 4 yes Figure 3 A local enlarged schematic diagram of point A. DETAILED DESCRIPTION
[0015] The utility model relates to a side core pulling mechanism with replaceable spring rollers for injection moulding of medical equipment housing. Figure 1 — Figure 4 As shown, it includes an upper composite plate 1 and a lower composite plate 2, a fixed template 3 is set under the upper composite plate 1, a perforation 4 is opened in the lower composite plate 2, a mold foot 5 is set on the lower composite plate 2, an upper ejector plate 6, a lower ejector plate 7 and an ejector 8 are set on the lower composite plate 2 between the mold feet, and the ejector rod 9 of the injection molding machine passes through the perforation 4 and cooperates with the lower ejector plate 7. A movable template 10 is set on the mold foot 5, and a mold cavity is formed between the movable template 10 and the fixed template 3. There is an injection-molded medical device housing 11 in the mold cavity, and a side hole 12 is opened on one side of the medical device housing 11. A fixed block 13 is set on the side wall of the fixed template 3, and a roller is set in the fixed block 13 14. The roller 14 is rotatably connected to the fixed block 13 via the rotating shaft 15. An elastic core-pulling assembly is arranged on the movable template 10. The elastic core-pulling assembly includes a fixed seat 16. A slide groove 17 is provided in the fixed seat 16. A core-pulling piece is provided in the slide groove 17. A spring 18 is provided on the outer wall of the core-pulling piece close to the medical device housing 11. One end of the spring 18 contacts the inner wall of the fixed seat 16, and the other end of the spring 18 contacts the core-pulling piece. One end of the core-pulling piece passes through the fixed seat 16 and cooperates with the side hole 12 of the medical device housing 11, and the other end of the core-pulling piece passes through the fixed seat 16 and cooperates with the roller 14.
[0016] Furthermore, the core-pulling component includes a core-pulling rod 20 and a push rod 21. One end of the core-pulling rod 20 passes through the fixed seat 16 and cooperates with the side hole 12 of the medical device housing 11. The other end of the core-pulling rod 20 is provided with a first baffle 22. The spring 18 is sleeved on the outer wall of the core-pulling rod 20. One end of the spring 18 contacts the inner wall of the fixed seat 16, and the other end of the spring 18 contacts the first baffle 22. One end of the push rod 21 is provided with a second baffle 23, and the second baffle 23 corresponds to the first baffle 22. The other end of the push rod 21 passes through the fixed seat 16 and cooperates with the roller 14.
[0017] Furthermore, an elastic rubber member 24 is provided between the core pulling pin 20 and the push rod 21. With the elastic rubber member 24, when the left end of the core pulling pin 20 collides with the side wall of the movable platen 10 due to long-term reciprocating motion and wears out, the elastic rubber member 24 can push the core pulling pin 20, so that the right end of the core pulling pin 20 always maintains contact with the side wall of the movable platen 10 when the mold is closed. Even if it wears out, it will not affect the precision of the injection molded product, thereby extending its service life.
[0018] Furthermore, the fixing base 16 is fixed to the movable plate 10 via fasteners, a first positioning hole 25 is defined at the bottom of the fixing base 16, and a first positioning pin 26 is provided in the movable plate 10, the first positioning pin 26 being engaged with the first positioning hole 25. With the first positioning hole 25 and the first positioning pin 26, the fixing base 16 and the movable plate 10 are accurately assembled and positioned, making installation more convenient.
[0019] Furthermore, the end of the push rod 21 away from the second baffle 23 is an arc-shaped head 27. The push rod 21 adopts the arc-shaped head 27, which cooperates with the roller 14 with little wear.
[0020] Furthermore, a second positioning hole 28 is formed in the fixing block 13, and a second positioning pin 29 is provided on the side wall of the fixed plate 3, and the second positioning pin 29 cooperates with the second positioning hole 28. With the second positioning hole 28 and the second positioning pin 29, the fixing block 13 and the fixed plate 3 are accurately assembled and positioned, and installation is more convenient.
[0021] The beneficial effect of the spring roller replaceable side core pulling mechanism of the injection mold for medical device housing of the utility model is as follows: after the medical device housing 11 in the mold cavity is injection molded, the lower double plate 2 drives the mold foot 5, the upper ejector plate 6, the lower ejector plate 8, the ejector 9, the movable mold plate 10, the medical device housing 11 and the elastic core pulling assembly (that is, all the structures on the movable mold side) to move downward, while the upper double plate 1, the fixed mold plate 3, the fixed block 13, and the roller 14 (that is, all the structures on the fixed mold side) remain stationary, and the mold is gradually opened from the fixed mold plate 3 and the movable mold plate 10. At this time, the roller 14 and the push rod 21 gradually break away from the limit contact, and the spring 18 pushes the first baffle 22 of the core pulling rod 20 to move to the right under the action of the restoring force, and the core pulling rod 20 drives the elastic rubber member 24 and the push rod 21 to move to the right together. When the push rod 21 When the second baffle 23 moves to contact the right inner wall of the fixed seat 16, the entire core-pulling part stops moving. At this time, the left head of the core-pulling rod 20 is just pulled out of the side hole 12 of the medical device housing 11. At this time, the ejector rod 9 of the injection molding machine passes through the perforation 4 to push the upper and lower ejector plates 6, 7 and the ejector pin 8 to move upward. The upper and lower ejector plates 6, 7 drive the ejector pin 8 to eject the medical device housing 11 after the core pulling is completed. When the mold is gradually closed, the lower composite plate 2 drives all the structures on the movable mold side to reset upward together, and the arc-shaped head 27 of the push rod 21 contacts the roller 14 upward. Under the action of the roller 14, the push rod 21 is pushed to move to the left. The push rod 21 drives the elastic rubber part 24 and the core-pulling rod 20 to move to the left to overcome the elastic force of the spring 18, so that the core-pulling part is reset. The medical device housing injection mold of this scheme has a spring roller replaceable side core pulling mechanism. First, the roller 14 is used to cooperate with the head of the push rod 21 of the core pulling part to reduce wear, effectively increase the service life of the core pulling part, and reduce the cost of replacing consumable parts; second, the core pulling part is divided into a core pulling rod 20 and a push rod 21, and an elastic rubber part 24 is set between the core pulling rod 20 and the push rod 21. After the end of the core pulling rod 20 is worn, the elasticity of the elastic rubber part 24 is used to push the core pulling rod 20, so that the core pulling rod 20 can always maintain contact with the side wall of the movable plate 10 when the mold is closed and reset, thereby ensuring the accuracy of the mold and increasing the service life of the core pulling rod 20 (that is, the core pulling rod 20 can continue to be used even if it is worn); third, the fixed seat 16, the core pulling part, and the spring 18 are combined into an elastic core pulling assembly. Since the various components of the elastic core pulling assembly are consumable parts, the entire elastic core pulling assembly can be replaced after wear, and the replacement is more convenient and quick.
Claims
1. A spring roller replaceable side core pulling mechanism for an injection mold of a medical device housing, comprising an upper plate (1) and a lower plate (2), a fixed plate (3) being provided under the upper plate (1), a through hole (4) being provided in the lower plate (2), a mold foot (5) being provided on the lower plate (2), an upper ejector plate (6), a lower ejector plate (7) and an ejector pin (8) being provided on the lower plate (2) between the mold feet, a ejector rod (9) of an injection molding machine passing through the through hole (4) and cooperating with the lower ejector plate (7), a movable plate (10) being provided on the mold foot (5), a mold cavity being formed between the movable plate (10) and the fixed plate (3), a medical device housing (11) being injection molded in the mold cavity, a side hole (12) being provided on one side of the medical device housing (11), and characterized in that: A fixed block (13) is provided on the side wall of the fixed template (3), a roller (14) is provided in the fixed block (13), and the roller (14) is rotatably connected to the fixed block (13) via a rotating shaft (15). An elastic core-pulling assembly is provided on the movable template (10), and the elastic core-pulling assembly includes a fixed seat (16), a slide groove (17) is provided in the fixed seat (16), a core-pulling piece is provided in the slide groove (17), a spring (18) is provided on the outer wall of one end of the core-pulling piece close to the medical device housing (11), one end of the spring (18) contacts the inner wall of the fixed seat (16), and the other end of the spring (18) contacts the core-pulling piece, one end of the core-pulling piece passes through the fixed seat (16) and cooperates with the side hole (12) of the medical device housing (11), and the other end of the core-pulling piece passes through the fixed seat (16) and cooperates with the roller (14).
2. The spring roller replaceable side core pulling mechanism of the injection mold for medical device housing according to claim 1, characterized in that: The core pulling component includes a core pulling rod (20) and a push rod (21), one end of the core pulling rod (20) passes through the fixed seat (16) and cooperates with the side hole (12) of the medical device housing (11), and the other end of the core pulling rod (20) is provided with a first baffle (22), and the spring (18) is sleeved on the outer wall of the core pulling rod (20), one end of the spring (18) contacts the inner wall of the fixed seat (16), and the other end of the spring (18) contacts the first baffle (22), and one end of the push rod (21) is provided with a second baffle (23), and the second baffle (23) corresponds to the first baffle (22), and the other end of the push rod (21) passes through the fixed seat (16) and cooperates with the roller (14).
3. The spring roller replaceable side core pulling mechanism of the injection mold for medical device housing according to claim 2, characterized in that: An elastic rubber member (24) is provided between the core-pulling rod (20) and the push rod (21).
4. The spring roller replaceable side core pulling mechanism of the injection mold for medical device housing according to claim 2, characterized in that: The fixed seat (16) is fixed to the movable plate (10) via a fastener, a first positioning hole (25) is provided at the bottom of the fixed seat (16), a first positioning pin (26) is provided in the movable plate (10), and the first positioning pin (26) is matched with the first positioning hole (25).
5. The spring roller replaceable side core pulling mechanism of the injection mold for medical device housing according to claim 2, characterized in that: The end of the push rod (21) away from the second baffle (23) is an arc-shaped head (27).
6. The spring roller replaceable side core pulling mechanism of the injection mold for medical device housing according to claim 1, characterized in that: A second positioning hole (28) is provided in the fixed block (13), and a second positioning pin (29) is provided on the side wall of the fixed template (3), and the second positioning pin (29) is matched with the second positioning hole (28).