Anti-reverse ejection mold

Abstract

The utility model discloses a reverse ejection prevention die which comprises an upper die forming male, an upper die base, a lower die base, a lower die forming male, a lower die floating plate and a swing block, an upper ejector pin is arranged at the lower end of the upper die base, the upper die forming male is fixed in the middle of the lower end of the upper die base, an upper ejector pin is arranged at the upper end of the lower die base, and the lower die forming male is fixed in the middle of the upper end of the lower die base. The lower die floating plate is located between the upper die forming male and the lower die forming male, the lower die forming male penetrates through the middle of the lower die floating plate, a swing shaft is arranged between the upper die base and the lower die base, the swing block is hinged to the swing shaft, the upper ejector pin and the lower ejector pin are connected to the first end of the swing block in the upper direction and the lower direction respectively, and a limiting notch is formed in the outer side of the lower die floating plate. And the second end of the swing block is pressed on the limiting notch. The reverse ejection prevention mold is applied to the forming process of automobile parts, the situation of reverse ejection of the mold is prevented, the design structure is simple, and the problems that the space in the mold is small and the mold cannot be placed down are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold for preventing reverse ejection. Background Art

[0002] A mold is various molds and tools used in industrial production to obtain required products by methods such as injection molding, blow molding, extrusion, die casting or forging, smelting, stamping, etc. In short, a mold is a tool for making formed articles, and this tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the outer shape of an article by changing the physical state of the formed material. Irregularly shaped products on an automobile need to be formed by using a mold. During the extrusion molding process, when the forming male on the lower mold is ready to eject the product, reverse ejection occurs, causing the product that has not been fully formed to be ejected upward, affecting the product quality. Summary of the Utility Model

[0003] An object of the utility model is to provide a mold for preventing reverse ejection, which can effectively prevent the occurrence of reverse ejection during the mold forming process.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A mold for preventing reverse ejection includes an upper mold forming male, an upper mold base, a lower mold base, a lower mold forming male, a lower mold floating plate and a swing block. An upper ejector pin is arranged at the lower end of the upper mold base, and the upper mold forming male is fixed in the middle of the lower end of the upper mold base. A lower ejector pin is arranged at the upper end of the lower mold base, and the lower mold forming male is fixed in the middle of the upper end of the lower mold base. The lower mold floating plate is located between the upper mold forming male and the lower mold forming male, and the lower mold forming male passes through the middle of the lower mold floating plate. A swing shaft is arranged between the upper mold base and the lower mold base, and the swing block is hinged on the swing shaft. The upper ejector pin and the lower ejector pin are respectively connected to the first end of the swing block in the up and down directions. A limiting notch is arranged on the outer side of the lower mold floating plate, and the second end of the swing block presses on the limiting notch.

[0006] As a preferred technical solution, an upper spring is installed on the upper mold base, and the lower end of the upper spring is connected to the upper ejector pin. A limiting plate is arranged between the upper mold base and the lower mold base, and the upper mold forming male passes through the limiting plate. A lower spring is installed on the limiting plate, and the upper end of the lower spring is connected to the lower ejector pin.

[0007] As a preferred technical solution, an outer plate is provided on the outer side of the lower die floating plate. An upper die nitrogen spring is installed on the upper die base. The driving end of the upper die nitrogen spring passes through the limiting plate and then is connected to the outer plate. A lower die nitrogen spring is installed on the lower die base. The driving end of the lower die nitrogen spring is connected to the lower die floating plate. The second end of the swing block moves inside the inner side of the outer plate.

[0008] As a preferred technical solution, an upper die pressure plate is fixed at the lower end of the upper die base. The upper die forming male die is located in the middle of the upper die pressure plate.

[0009] The beneficial effects of the present utility model are as follows: A mold for preventing reverse ejection is provided. This mold for preventing reverse ejection is applied in the forming process of automotive parts to prevent the mold from experiencing reverse ejection. The design structure is simple, and it solves the problem of small space and inability to place in the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following further describes the present utility model in detail according to the drawings and embodiments.

[0011] Figure 1 It is a three-dimensional view of the overall structure of a mold for preventing reverse ejection described in the embodiment;

[0012] Figure 2 It is a first partial three-dimensional view of a mold for preventing reverse ejection described in the embodiment;

[0013] Figure 3 It is a second partial three-dimensional view of a mold for preventing reverse ejection described in the embodiment;

[0014] Figure 4 It is a third partial three-dimensional view of a mold for preventing reverse ejection described in the embodiment;

[0015] Figure 5 It is a cross-sectional view of a mold for preventing reverse ejection described in the embodiment.

[0016] Figures 1 to 5 In the figure:

[0017] 1. Upper die forming male die; 2. Upper die base; 3. Lower die base; 4. Lower die forming male die; 5. Lower die floating plate; 6. Swing block; 7. Upper ejector pin; 8. Lower ejector pin; 9. Swing shaft; 10. Limiting notch; 11. Upper spring; 12. Limiting plate; 13. Lower spring; 14. Outer plate; 15. Upper die nitrogen spring; 16. Lower die nitrogen spring; 17. Upper die pressure plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further illustrates the technical solutions of the present utility model in conjunction with the drawings and through specific embodiments.

[0019] As Figures 1 to 5As shown in the figure, in this embodiment, an anti-reverse-top mold includes an upper mold forming male die 1, an upper mold base 2, a lower mold base 3, a lower mold forming male die 4, a lower mold floating plate 5, and a swing block 6. An upper ejector pin 7 is provided at the lower end of the upper mold base 2. The upper mold forming male die 1 is fixed in the middle of the lower end of the upper mold base 2. A lower ejector pin 8 is provided at the upper end of the lower mold base 3. The lower mold forming male die 4 is fixed in the middle of the upper end of the lower mold base 3. The lower mold floating plate 5 is located between the upper mold forming male die 1 and the lower mold forming male die 4. The lower mold forming male die 4 passes through the middle of the lower mold floating plate 5. A swing shaft 9 is provided between the upper mold base 2 and the lower mold base 3. The swing block 6 is hinged on the swing shaft 9. The upper ejector pin 7 and the lower ejector pin 8 are respectively connected to the first end of the swing block 6 in the upper and lower directions. A limiting notch 10 is provided on the outside of the lower mold floating plate 5. The second end of the swing block 6 presses on the limiting notch 10.

[0020] Specifically, an upper spring 11 is installed on the upper mold base 2. The lower end of the upper spring 11 is connected to the upper ejector pin 7. A limiting plate 12 is provided between the upper mold base 2 and the lower mold base 3. The upper mold forming male die 1 passes through the limiting plate 12. A lower spring 13 is installed on the limiting plate 12. The upper end of the lower spring 13 is connected to the lower ejector pin 8. An outer plate 14 is provided on the outside of the lower mold floating plate 5. An upper mold nitrogen spring 15 is installed on the upper mold base 2. The driving end of the upper mold nitrogen spring 15 passes through the limiting plate 12 and is then connected to the outer plate 14. A lower mold nitrogen spring 16 is installed on the lower mold base 3. The driving end of the lower mold nitrogen spring 16 is connected to the lower mold floating plate 5. The second end of the swing block 6 moves inside the inner side of the outer plate 14. A upper mold pressure plate 17 is fixed at the lower end of the upper mold base 2. The upper mold forming male die 1 is located in the middle of the upper mold pressure plate 17.

[0021] Process: Place the lower mold floating plate 5 on the lower mold forming male die 4. The product is on the lower mold floating plate 5. The upper mold base 2 drives the upper mold forming male die 1 to move downward together, pressing the product on the lower mold floating plate 5. Since the lower mold floating plate 5 moves downward, the lower mold forming male die 4 is pushed up from the middle of the lower mold floating plate 5. At this time, the upper mold forming male die 1 is still 6 mm away from the bottom. Then the upper mold base 2 continues to move downward. The positions of the lower mold floating plate 5, the limiting plate 12, and the outer plate 14 remain unchanged. Under the action of the upper mold base 2, the swing block 6 swings inward along the swing shaft 9, so that the swing block 6 is stuck in the limiting notch 10 of the lower mold floating plate 5, preventing the lower mold floating plate 5 from automatically bouncing up. At this time, the upper mold forming male die 1 is still 2 mm away from the bottom. Finally, when the swing block 6 is straightened, the upper mold forming male die 1 is completely pressed to the bottom, and the product is formed. The lower mold floating plate 5 is also clamped and cannot bounce up, ensuring the prevention of reverse top. When opening the mold, the upper mold base 2 rises, the upper ejector pin 7 and the lower ejector pin 8 release the swing block 6, and the swing block 6 returns to its original position, that is, the lower mold floating plate 5 is released. The lower mold nitrogen spring 16 pushes up the lower mold floating plate 5, and the product is separated from the lower mold forming male die 4. At the same time, the upper mold nitrogen spring 15 releases the outer plate 14, and the product can be taken away.

[0022] It should be noted that the above specific embodiments are only the preferred embodiments of the present utility model and the technical principles applied. Any changes or substitutions that are easily conceivable by those skilled in the art within the technical scope disclosed by the present utility model should be covered by the protection scope of the present utility model.

Claims

1. A mold for preventing reverse jacking, characterized in that, It includes an upper die forming male die, an upper die holder, a lower die holder, a lower die forming male die, a lower die floating material plate and a swing block. An upper ejector pin is provided at the lower end of the upper die holder. The upper die forming male die is fixed in the middle of the lower end of the upper die holder. A lower ejector pin is provided at the upper end of the lower die holder. The lower die forming male die is fixed in the middle of the upper end of the lower die holder. The lower die floating material plate is located between the upper die forming male die and the lower die forming male die. The lower die forming male die passes through the middle of the lower die floating material plate. A swing shaft is provided between the upper die holder and the lower die holder. The swing block is hinged on the swing shaft. The upper ejector pin and the lower ejector pin are respectively connected to the first end of the swing block in the upper and lower directions. A limiting notch is provided on the outer side of the lower die floating material plate. The second end of the swing block presses on the limiting notch.

2. The anti-reverse top mold according to claim 1, characterized in that, An upper spring is installed on the upper die holder. The lower end of the upper spring is connected to the upper ejector pin. A limiting plate is provided between the upper die holder and the lower die holder. The upper die forming male die passes through the limiting plate. A lower spring is installed on the limiting plate. The upper end of the lower spring is connected to the lower ejector pin.

3. The anti-reverse top mold according to claim 2, characterized in that, An outer plate is provided on the outer side of the lower die floating material plate. An upper die nitrogen spring is installed on the upper die holder. The driving end of the upper die nitrogen spring passes through the limiting plate and then is connected to the outer plate. A lower die nitrogen spring is installed on the lower die holder. The driving end of the lower die nitrogen spring is connected to the lower die floating material plate. The second end of the swing block moves inside the inner side of the outer plate.

4. A mold for preventing reverse jacking according to claim 1, characterized in that, An upper die pressure plate is fixed at the lower end of the upper die holder. The upper die forming male die is located in the middle of the upper die pressure plate.

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