Spring and roller replaceable type side core-pulling mechanism of medical equipment shell injection mold
By designing a spring roller interchangeable side core pulling mechanism in the injection mold, using the roller to cooperate with the push rod head of the core pulling member and the elastic rubber part, the problems of inclined guide column wear and oil cylinder occupying space in the prior art are solved. Improves service life and production efficiency and simplifies the replacement process of consumables.
Patent Information
- Application Number
- CN202411499959.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-01-17
AI Technical Summary
When existing injection molds produce plastic products, when side holes are opened on the side wall, the inclined guide columns and inclined guide hole structures are prone to wear, have short service life, high cost of replacement of consumable parts, and the oil cylinder structure occupies mold space, affecting production efficiency.
A medical equipment shell injection mold spring roller replaceable side core pulling mechanism is designed, including roller, core pulling member and elastic rubber component. The roller cooperates with the push rod head of the core pulling member to reduce wear and pulling down the core pulling process. An elastic rubber piece is installed between the rod and the push rod to ensure that the core pulling member fits with the side wall of the movable template when the mold is closed and reset, making it easier to replace the elastic core pulling assembly.
It effectively increases the service life of the core drawer, reduces the cost of replacement of consumables, improves production efficiency, and ensures the accuracy of the mold and the convenience of replacement.
Smart Images
Figure CN119319646A_ABST
Abstract
Description
Technical Field
[0001] The invention 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 injection molds to produce plastic products, if the side wall of the plastic product is provided with a side hole, the prior art usually sets an inclined guide column in the fixed mold plate of the injection mold, sets a side core-pulling slider on the side of the side hole of the plastic product on the movable mold plate, one side of the side core-pulling slider cooperates with the side hole, and an inclined guide hole is set in the side core-pulling slider. When opening the mold, the inclined guide hole cooperates with the inclined guide column to drive the side core-pulling slider to pull out the side hole. The inclined guide column and the inclined guide hole structure are easy to wear, especially for injection molds that work continuously for a long time, and the service life is short. Once the inclined guide column and the inner wall of the inclined guide hole are worn, the processing accuracy is affected, so they need to be replaced frequently, and the replacement cost of consumables is high and the replacement is troublesome. In addition, some people have designed to set an oil cylinder on the side wall of the movable mold plate, and the piston rod of the oil cylinder is connected to the side core-pulling slider, but the disadvantages of this structure are: the oil cylinder needs to be set horizontally, occupying the horizontal space of the mold, resulting in an increase in the volume of the mold, and before the mold is opened, it is necessary to pull the core through the oil cylinder before the mold can be opened. The core pulling action occupies the mold opening time, resulting in reduced production efficiency. Summary of the invention
[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a spring roller replaceable side core pulling mechanism for a medical device housing injection mold which 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 present invention is: it includes an upper composite plate and a lower composite plate, a fixed mold plate is arranged under the upper composite plate, a perforation is provided in the lower composite plate, a mold foot is arranged on the lower composite plate, an upper ejector plate, a lower ejector plate and an ejector are arranged on the lower composite plate between the mold feet, the ejector rod of the injection molding machine passes through the perforation and cooperates with the lower ejector plate, a movable mold plate is arranged on the mold foot, a mold cavity is formed between the movable mold plate and the fixed mold plate, 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, a fixed block is arranged on the side wall of the fixed mold plate, a roller is arranged in the fixed block, the roller is rotatably connected to the fixed block via a rotating shaft, and the An elastic core pulling assembly is arranged on the movable template, and the elastic core pulling assembly includes a fixed seat, a slide groove is arranged in the fixed seat, and a core pulling piece is arranged in the slide groove. The core pulling piece includes a core pulling rod and a push rod, and an elastic rubber piece is arranged between the core pulling rod and the push rod. One end of the core pulling rod passes through the fixed seat and cooperates with the side hole of the medical equipment housing, and a first baffle is arranged at the other end of the core pulling rod. A 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. A second baffle is arranged at one end of the push rod, and the second baffle corresponds to the first baffle. The other end of the push rod passes through the fixed seat and cooperates with the roller.
[0005] 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 arranged in the movable template, and the first positioning pin cooperates with the first positioning hole.
[0006] Furthermore, the end of the push rod away from the second baffle is an arc-shaped head.
[0007] 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 matches with the second positioning hole.
[0008] The beneficial effects of the spring roller replaceable side core pulling mechanism of the injection mold for the medical device housing of the present invention are: first, 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; second, the core pulling part is divided into a core pulling rod and a push rod, and an elastic rubber part is arranged 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 mold plate when the mold is closed and reset, thereby ensuring the accuracy of the mold and increasing the service life of the core pulling rod; third, 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
[0009] Figure 1It is a schematic structural diagram of the mold closing state of the spring roller replaceable side core pulling mechanism of the injection mold for the medical device housing of the present invention; Figure 2 It is a structural schematic diagram of the mold opening and core pulling state of the spring roller replaceable side core pulling mechanism of the injection mold for the medical device housing of the present invention; Figure 3 It is a schematic structural diagram of the ejection state of the medical device housing of the spring roller replaceable side core pulling mechanism of the injection mold of the medical device housing of the present invention; Figure 4 yes Figure 3 A local enlarged schematic diagram of point A. DETAILED DESCRIPTION
[0010] The present invention relates to a side core pulling mechanism with replaceable spring rollers for a medical device housing injection mold. Figure 1 — Figure 4 As shown, it includes an upper composite plate 1 and a lower composite plate 2, a fixed mold plate 3 is arranged under the upper composite plate 1, a through hole 4 is provided in the lower composite plate 2, a mold foot 5 is provided on the lower composite plate 2, an upper ejector plate 6, a lower ejector plate 7 and an ejector 8 are provided on the lower composite plate 2 between the mold feet, an ejector rod 9 of an injection molding machine passes through the through hole 4 and cooperates with the lower ejector plate 7, a movable mold plate 10 is provided on the mold foot 5, a mold cavity is formed between the movable mold plate 10 and the fixed mold plate 3, an injection-molded medical device housing 11 is arranged in the mold cavity, a side hole 12 is provided on one side of the medical device housing 11, a fixed block 13 is provided on the side wall of the fixed mold plate 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 component is provided on the movable mold plate 10, and the elastic core pulling component The component includes a fixed seat 16, a slide groove 17 is provided in the fixed seat 16, and a core pulling part is arranged in the slide groove 17. The core pulling part includes a core pulling rod 20 and a push rod 21. An elastic rubber part 24 is arranged between the core pulling rod 20 and the 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. A 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. A second baffle 23 is arranged at one end of the push rod 21, 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.
[0011] Furthermore, the fixing seat 16 is fixed to the movable plate 10 via a fastener, a first positioning hole 25 is provided at the bottom of the fixing seat 16, a first positioning pin 26 is provided in the movable plate 10, and the first positioning pin 26 matches the first positioning hole 25. With the first positioning hole 25 and the first positioning pin 26, the fixing seat 16 and the movable plate 10 are accurately assembled and positioned, and the installation is more convenient.
[0012] 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, and the wear of the push rod 21 in cooperation with the roller 14 is small.
[0013] Furthermore, a second positioning hole 28 is provided in the fixing 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 matches the second positioning hole 28. With the second positioning hole 28 and the second positioning pin 29, the fixing block 13 and the fixed template 3 are accurately assembled and positioned, and the installation is more convenient.
[0014] The beneficial effect of the spring roller replaceable side core pulling mechanism of the injection mold for medical device housing of the present invention is that: 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 (i.e., all structures on the movable mold side) to move downward together, while the upper double plate 1, the fixed mold plate 3, the fixed block 13, and the roller 14 (i.e., all 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 limiting 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 plate 23 moves to contact the right inner wall of the fixing 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, and 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, and 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 spring roller replaceable side core pulling mechanism of the injection mold for the housing of medical equipment of this scheme has the following advantages: 1. 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 replacement cost of consumable parts; 2. The core pulling part is divided into a core pulling rod 20 and a push rod 21, and an elastic rubber part 24 is arranged 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 keep in contact with the side wall of the movable mold 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); 3. 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 arranged under the upper plate (1), a through hole (4) being provided in the lower plate (2), a mold foot (5) being arranged on the lower plate (2), an upper ejector plate (6), a lower ejector plate (7) and an ejector (8) being arranged on the lower plate (2) between the mold feet, an 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 arranged 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 arranged on the side wall of the fixed mold plate (3), a roller (14) is arranged 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 component is arranged on the movable mold plate (10), and the elastic core pulling component includes a fixed seat (16), a slide groove (17) is provided in the fixed seat (16), and a core pulling component is arranged in the slide groove (17). The core pulling component includes a core pulling rod (20) and a push rod (21), and an elastic rubber component (24) is arranged between the core pulling rod (20) and the push rod (21). The core pulling rod (20) One end of the push rod (21) 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); a 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); 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), 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).
2. The spring roller replaceable side core pulling mechanism of the injection mold for medical device housing as claimed in claim 1, characterized in that: The fixing seat (16) is fixed to the movable plate (10) via a fastener, a first positioning hole (25) is provided at the bottom of the fixing seat (16), a first positioning pin (26) is provided in the movable plate (10), and the first positioning pin (26) matches the first positioning hole (25).
3. The spring roller replaceable side core pulling mechanism of the injection mold for medical device housing as claimed in claim 1, characterized in that: The end of the push rod (21) away from the second baffle (23) is an arc-shaped head (27).
4. The spring roller replaceable side core pulling mechanism of the injection mold for medical device housing as claimed in claim 1, characterized in that: A second positioning hole (28) is provided in the fixing 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) matches the second positioning hole (28).