Injection mold for bottom shell forming
By designing the matching of oblique support pins and forming sliders in the injection mold, combined with the coordination of limit steps and limit steps, the smooth ejection and removal of the plastic bottom shell is achieved, solving the problem of the stuck plastic bottom shell in the existing mold.
Patent Information
- Application Number
- CN202422222551.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-10
AI Technical Summary
When the existing injection molds for bottom shell molding are opened, the plastic bottom shell is easily stuck on the thimble and difficult to remove.
An injection mold is designed, including a bottom plate, a rear mold, a first thimble mounting plate and a second thimble mounting plate. Through the cooperation of the oblique support pin and the forming slider, the smooth ejection and removal of the plastic bottom shell is achieved.
The mold ensures that the plastic bottom shell can be removed from the thimble smoothly through the coordination of the limit step and the limit step, thus making it easy to take out, solving the problem of the plastic bottom shell stuck.
Smart Images
Figure CN223000996U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds for bottom shell molding, and particularly relates to an injection mold for bottom shell molding. Background Art
[0002] At present, when the existing injection mold for bottom shell molding opens the mold and ejects the plastic bottom shell, due to the thermal expansion and contraction of the plastic bottom shell, after the plastic bottom shell cools, the plastic bottom shell is easily stuck on the ejector pin, and it is very difficult to take out the plastic bottom shell. Therefore, the structure of the existing injection mold for bottom shell molding needs to be further improved. Summary of the Utility Model
[0003] The purpose of the utility model is to provide an injection mold for bottom shell molding that can easily take out the plastic bottom shell.
[0004] The purpose of the utility model is achieved as follows:
[0005] An injection mold for bottom shell molding, including a bottom plate, a rear mold, a first ejector pin mounting plate and a front mold. The rear mold is arranged on the front side of the bottom plate and fixedly connected to the bottom plate. The back surface of the front mold is provided with a female mold core and four inclined support pins. The four inclined support pins are respectively inclined and arranged on the upper side, lower side, left side and right side of the female mold core. The front surface of the rear mold corresponding to the position of the female mold core is provided with a male mold core. Four forming sliders are respectively and vertically slidably arranged on the front surface of the rear mold corresponding to the positions of the four inclined support pins. The four forming sliders are respectively located on the upper side, lower side, left side and right side of the male mold core. The four forming sliders are provided with inclined holes corresponding to the inclined support pins, and the inclined support pins are inclined and inserted into the inclined holes. The first ejector pin mounting plate is horizontally slidably arranged between the bottom plate and the rear mold. The first ejector pin mounting plate is provided with a plurality of first ejector pins. The male mold core is provided with a first relief long hole corresponding to the first ejector pins. The front end of the first ejector pin horizontally passes through the rear mold and extends into the first relief long hole. Its characteristic is that it further includes a second ejector pin mounting plate. The second ejector pin mounting plate is arranged on the front surface of the first ejector pin mounting plate. The second ejector pin mounting plate is provided with a plurality of second ejector pins. The male mold core is provided with a second relief long hole corresponding to the second ejector pins. The front end of the second ejector pin horizontally passes through the rear mold and extends into the second relief long hole. A first limiting step is arranged in the second relief long hole. A first limiting step is arranged on the side wall of the second ejector pin. The first limiting step and the first limiting step cooperate with each other. The first ejector pin mounting plate and the second ejector pin mounting plate are respectively provided with a first mounting channel and a second mounting channel corresponding to the second ejector pins. A second limiting step is arranged in the second mounting channel. A second limiting step is arranged on the side wall of the second ejector pin. The second limiting step and the second limiting step cooperate with each other.
[0006] The utility model can be further improved as follows.
[0007] The front end of the second ejector pin is in a stepped shape.
[0008] The front end of the second ejector pin is exposed on the front surface of the male mold core.
[0009] The utility model further includes an ejector rod, which is horizontally and slidably arranged in the first installation channel. A compression spring is sleeved on the ejector rod. The front end of the compression spring abuts against the ejector rod, and the front end of the ejector rod abuts against the rear end of the second ejector pin.
[0010] The ejector rod is in a T shape.
[0011] The beneficial effects of the utility model are as follows:
[0012] The first ejector pin and the second ejector pin of the utility model eject the plastic bottom shell together. The plastic bottom shell is clamped on the second ejector pin. Subsequently, due to the first limit step and the first stepped limit effect, the second ejector pin stops sliding forward, and the first ejector pin continues to slide forward. The plastic bottom shell is pushed away from the front end of the second ejector pin by the first ejector pin, so that the plastic bottom shell is separated from the first ejector pin and the second ejector pin, which is convenient for taking out.
[0013] When the front mold and the rear mold of the utility model are closed, the front mold slides backward, and four diagonal support pins are respectively inserted into the diagonal holes of four forming sliders backward. The diagonal support pins drive the four forming sliders to slide simultaneously in the direction towards the male mold core. When the front mold and the rear mold of the utility model are opened, the front mold slides forward, and four diagonal support pins are respectively withdrawn from the diagonal holes of four forming sliders forward. The diagonal support pins drive the four forming sliders to slide simultaneously in the direction away from the male mold core. Description of the Drawings
[0014] Figure 1 is a schematic structural diagram of the injection mold of the utility model.
[0015] Figure 2 is a schematic structural diagram of the injection mold of the utility model from another angle.
[0016] Figure 3 is the front view of the injection mold of the utility model.
[0017] Figure 4 is Figure 3 the sectional view at A-A in
[0018] Figure 5 is Figure 3 the sectional view at B-B in
[0019] Figure 6 is the exploded view of the injection mold of the utility model.
[0020] Figure 7 is the schematic structural diagram of the injection mold of the utility model after omitting the front mold and the rear mold (the ejector pins are not ejected).
[0021] Figure 8 is Figure 7 the sectional view of
[0022] Figure 9 It is a schematic structural diagram of the injection mold of the present utility model after omitting the front mold and the rear mold (ejected by the ejector pin).
[0023] Figure 10 is Figure 9 cross-sectional view of. Specific embodiments
[0024] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0025] Embodiment 1, as Figures 1 to 10As shown in the figure, an injection mold for forming a bottom shell includes a bottom plate 1, a rear mold 2, a first ejector pin mounting plate 4, a second ejector pin mounting plate 5, and a front mold 3. The rear mold 2 is disposed on the front side of the bottom plate 1 and fixedly connected to the bottom plate 1. On the back surface of the front mold 3, there are a female mold core 22 and four inclined support pins 23. The four inclined support pins 23 are respectively inclined and disposed on the upper side, lower side, left side, and right side of the female mold core 22. On the front surface of the rear mold (2) corresponding to the position of the female mold core 22, there is a male mold core 21. On the front surface of the rear mold 2 corresponding to the positions of the four inclined support pins 23, there are respectively four forming sliders 24 slidably arranged vertically. The four forming sliders 24 are respectively located on the upper side, lower side, left side, and right side of the male mold core 21. The four forming sliders 24 are provided with inclined holes 25 corresponding to the inclined support pins 23, and the inclined support pins 23 are inclined and inserted into the inclined holes 25. The first ejector pin mounting plate 4 is horizontally slidably arranged between the bottom plate 1 and the rear mold 2. On the first ejector pin mounting plate 4, there are multiple first ejector pins 41. The male mold core 21 is provided with a first relief long hole 611 corresponding to the first ejector pins 41. The front end of the first ejector pin 41 horizontally passes through the rear mold 2 and extends into the first relief long hole 611. The second ejector pin mounting plate 5 is disposed on the front surface of the first ejector pin mounting plate 4. On the second ejector pin mounting plate 5, there are multiple second ejector pins 61. The male mold core 21 is provided with a second relief long hole 612 corresponding to the second ejector pins 61. The front end of the second ejector pin 61 horizontally passes through the rear mold 2 and extends into the second relief long hole 612. In the second relief long hole 612, there is a first limiting step 67. On the side wall of the second ejector pin 61, there is a first limiting step 65. The first limiting step 67 and the first limiting step 65 cooperate with each other. On the first ejector pin mounting plate 4 and the second ejector pin mounting plate 5, there are respectively a first mounting channel 69 and a second mounting channel 610 corresponding to the second ejector pin. In the second mounting channel 610, there is a second limiting step 66. On the side wall of the second ejector pin 61, there is a second limiting step 64. The second limiting step 66 and the second limiting step 64 cooperate with each other. In the first mounting channel 69, there is a compression spring 62. The front end of the compression spring 62 abuts against the rear end of the second ejector pin 61. When the front mold 3 and the rear mold 2 of the present invention are closed, the front mold slides backward, and the four inclined support pins 23 respectively insert into the inclined holes of the four forming sliders 24 backward, and the inclined support pins 23 drive the four forming sliders 24 to slide simultaneously in the direction towards the male mold core. When the front mold 3 and the rear mold 2 of the present invention are opened, the front mold slides forward, and the four inclined support pins 23 respectively withdraw from the inclined holes of the four forming sliders 24 forward, and the inclined support pins 23 drive the four forming sliders 24 to slide simultaneously in the direction away from the male mold core.
[0026] The structures of the bottom plate 1, the rear mold 2, and the front mold 3 of the present invention are prior arts, and their injection molding principles will not be described herein.
[0027] As a more specific technical solution of the present invention.
[0028] The front end of the second ejector pin 61 is in a stepped shape.
[0029] The front end of the second ejector pin 61 is exposed on the front surface of the male mold core 21.
[0030] The utility model further includes an ejector rod 63 which is horizontally and slidably arranged in the first installation channel 69. A compression spring 62 is sleeved on the ejector rod 63. The front end of the compression spring 62 abuts against the ejector rod 63, and the front end of the ejector rod 63 abuts against the rear end of the second ejector pin 61.
[0031] The ejector rod 63 is in a T shape.
[0032] The working principle of the utility model is as follows:
[0033] After the front mold and the rear mold of the utility model are opened, the first ejector pin 41 and the second ejector pin 61 of the utility model start to push out the plastic bottom shell 7 forward. The oil cylinder drives the first ejector pin mounting plate 4 and the second ejector pin mounting plate 5 to slide forward. The bottom plate 1, the rear mold 2 and the male mold core 21 remain stationary. When the first ejector pin mounting plate 4 and the second ejector pin mounting plate 5 slide forward and the first ejector pin 41 and the second ejector pin 61 push out the plastic bottom shell 7 forward together, the plastic bottom shell 7 is separated from the male mold core 21. Due to thermal expansion and contraction, the plastic bottom shell 7 is clamped on the second ejector pin 61. Due to the first limiting step 65 and the first stepped limiting effect, the second ejector pin 61 stops sliding forward. The first ejector pin 41 continues to slide forward, and the plastic bottom shell 7 is pushed away from the front end of the second ejector pin 61 by the first ejector pin 41, so that the plastic bottom shell 7 is separated from the first ejector pin 41 and the second ejector pin 61, which is convenient for taking out.
Claims
1. An injection mold for bottom shell molding, comprising a bottom plate (1), a rear mold (2) and a front mold (3), wherein the rear mold (2) is arranged on the front side of the bottom plate (1) and is fixedly connected to the bottom plate (1), and a female mold core (22) and four diagonal support pins (23) are arranged on the back side of the front mold (3), and the four diagonal support pins (23) are arranged obliquely on the upper side, the lower side, the left side and the right side of the female mold core (22), respectively, and a male mold core (21) is arranged on the front surface of the rear mold (2) at a position corresponding to the female mold core (22), and four molding slide blocks (24) are arranged on the front surface of the rear mold (2) at positions corresponding to the four diagonal support pins (23) so as to slide vertically. The sliders (24) are respectively located on the upper side, the lower side, the left side and the right side of the male mold core (21); the four molding sliders (24) are provided with oblique holes (25) corresponding to the oblique support pins (23); the oblique support pins (23) are obliquely inserted into the oblique holes (25); the first ejector mounting plate (4) is horizontally slidably arranged between the bottom plate (1) and the rear mold (2); a plurality of first ejector pins (41) are provided on the first ejector mounting plate (4); the male mold core (21) is provided with a first clearance long hole (611) corresponding to the first ejector pin (41); the front end of the first ejector pin (41) passes horizontally forward through the rear mold (2) and extends into the first clearance long hole (611); the invention is characterized in that: The mold body (21) further comprises a second ejector pin mounting plate (5), the second ejector pin mounting plate (5) being arranged on the front surface of the first ejector pin mounting plate (4), a plurality of second ejector pins (61) being arranged on the second ejector pin mounting plate (5), a second clearance long hole (612) being arranged on the male mold core (21) corresponding to the second ejector pins (61), a front end of the second ejector pin (61) passing horizontally forward through the rear mold (2) and extending into the second clearance long hole (612), a first limiting step (67) being arranged in the second clearance long hole (612), and a side of the second ejector pin (61) A first limiting step (65) is provided on the wall, the first limiting step (67) cooperates with the first limiting step (65), the first ejector mounting plate (4) and the second ejector mounting plate (5) are respectively provided with a first mounting channel (69) and a second mounting channel (610) corresponding to the second ejector, a second limiting step (66) is provided in the second mounting channel (610), a second limiting step (64) is provided on the side wall of the second ejector (61), and the second limiting step (66) cooperates with the second limiting step (64).
2. The injection mold for bottom shell molding according to claim 1, characterized in that: The front end of the second ejector pin (61) is step-shaped.
3. The injection mold for bottom shell molding according to claim 1, characterized in that: The front end of the second ejector pin (61) is exposed on the front surface of the male mold core (21).