Anti-pressing mold protection structure

Abstract

The utility model discloses an anti-pressing die protection structure, and relates to the technical field of dies. Comprising a lower die and an upper die, guide columns are embedded in the periphery of the lower die, guide sleeves are embedded in the periphery of the upper die, the lower die and the lower die are assembled through the guide sleeves and the guide columns, the lower die comprises a lower fixing plate, die feet, a male die core, a lower ejector plate, an upper ejector plate, an ejector pin, a return pin, a reset spring and a supporting head, and the die feet are fixedly installed at the two ends of the lower fixing plate. And the male mold core is fixedly mounted at the top of the mold foot. According to the anti-pressing mold protection structure, after mold opening ejection in injection molding production and under the condition that ejector pins are not completely reset, the lower ejection plate is in an ascending state, the supporting head is forced to ascend, a female mold core is blocked by the ascending supporting head, mold closing interference is carried out, the mold cannot be closed under the low-pressure protection effect of a machine table, and therefore under the condition that an ejection system breaks down, the mold cannot be damaged, and the mold cannot be damaged. And the mold is protected, the maintenance cost is saved, the structure is simple, and implementation is easy.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a pressure-resistant mold protection structure. Background Technology

[0002] Injection molds are tools used to produce plastic products, and they also give plastic products a complete structure and precise dimensions. Injection molding is a processing method used to mass-produce certain complex-shaped parts. Specifically, it refers to injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and then obtaining the molded product after cooling and solidification.

[0003] In existing injection molds, after the mold opens during injection production, the slide block pulls out the core, requiring an ejector plate as the ejection system to eject the completed plastic part before closing the mold for the next injection production. When the ejection system malfunctions, the ejector pins cannot automatically reset, and when the mold closes again, they will damage the mold slide block or cavity, resulting in expensive mold repair costs. Utility Model Content

[0004] This utility model provides a pressure-resistant mold protection structure to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure-resistant mold protection structure, comprising a lower mold and an upper mold, wherein guide pillars are inlaid around the perimeter of the lower mold, and guide sleeves are inlaid around the perimeter of the upper mold, and the mold is closed with the lower mold through the guide sleeves and guide pillars; the lower mold includes a lower fixed plate, mold feet, male mold core, lower ejector plate, upper ejector plate, ejector pins, return pins, a return spring, and a support head, wherein the mold feet are fixedly installed at both ends of the lower fixed plate, the male mold core is fixedly installed at the top of the mold feet, the lower ejector plate is fixedly installed on the lower fixed plate, the upper ejector plate is fixedly installed on the lower ejector plate, the ejector pins are inlaid on the upper ejector plate, and their upper parts extend into the cavity of the male mold core, the return pins are inlaid at the bottom of the male mold core, the return springs are fitted on the return pins, and the support head is movably inlaid on the lower ejector plate, and its upper part extends into the male mold core.

[0006] Furthermore, the upper mold includes an upper fixed plate, a sprue bushing, and a female mold core. The sprue bushing is embedded in the top of the upper fixed plate, and the female mold core is installed at the bottom of the upper fixed plate.

[0007] Furthermore, the bottom end of the gate bushing is connected to the cavity flow channel of the female mold core, and the cavities of the female mold core and the male mold core correspond to each other.

[0008] Furthermore, the guide sleeve is embedded around the female mold core, and the guide post is embedded around the male mold core.

[0009] Furthermore, the lower fixing plate has an ejector pin hole in the middle, and the return pin is located around the bottom of the male mold core.

[0010] Furthermore, the support head is located around the male mold core, and the top of the support head is flush with the top of the male mold core.

[0011] Compared with the prior art, the present invention provides a pressure-resistant mold protection structure, which has the following beneficial effects:

[0012] This anti-pressure mold protection structure, in the event that the ejector pins are not fully reset after the mold opens during injection molding, will cause the lower ejector plate to rise, forcing the support head to rise. The female mold core will be blocked by the upward support head, causing mold closing interference. Under the low-pressure protection of the machine, the mold cannot close. In this way, it will protect the mold in the event of an ejection system failure, save maintenance costs, and has a simple structure that is easy to implement. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a top view of the lower mold of this utility model.

[0016] In the diagram: 1. Lower mold; 11. Lower fixed plate; 12. Mold foot; 13. Male mold core; 14. Lower ejector plate; 15. Upper ejector plate; 16. Ejector pin; 17. Return pin; 18. Return spring; 19. Support head; 110. Ejector pin hole; 2. Upper mold; 21. Upper fixed plate; 22. Sprue bushing; 23. Female mold core; 3. Guide pillar; 4. Guide bushing. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1-3This utility model discloses a mold protection structure for preventing pressure, including a lower mold 1 and an upper mold 2. The lower mold 1 is inlaid with guide pillars 3 around its perimeter, and the upper mold 2 is inlaid with guide sleeves 4 around its perimeter. The upper mold 2 is closed with the lower mold 1 through the guide sleeves 4 and guide pillars 3. After the mold is opened and ejected during injection molding, if the ejector pins 16 are not fully reset, the lower ejector plate 14 will be in an upward state, which will force the support head 19 to rise. The female mold core 23 will be blocked by the upward support head 19, causing mold closing interference. Under the low pressure protection of the machine, the mold cannot close. In this way, in the event of a failure of the ejection system, it will protect the mold, save maintenance costs, and has a simple structure that is easy to implement.

[0019] The lower mold 1 includes a lower fixed plate 11, mold feet 12, male mold core 13, lower ejector plate 14, upper ejector plate 15, ejector pins 16, return pins 17, return springs 18, and support heads 19. The mold feet 12 are fixedly installed at both ends of the lower fixed plate 11. The male mold core 13 is fixedly installed at the top of the mold feet 12. The lower ejector plate 14 is fixedly installed on the lower fixed plate 11. The upper ejector plate 15 is fixedly installed on the lower ejector plate 14. The ejector pins 16 are embedded in the upper ejector plate 15, and their upper parts extend into the cavity of the male mold core 13. The return pins 17 are embedded in the bottom of the male mold core 13. The return springs 18 are fitted onto the return pins 17. The support heads 19 are movably embedded in the lower ejector plate 14, and their upper parts extend into the male mold core 13.

[0020] Specifically, the upper mold 2 includes an upper fixed plate 21, a sprue bushing 22, and a female mold core 23. The sprue bushing 22 is embedded in the top of the upper fixed plate 21, and the female mold core 23 is installed at the bottom of the upper fixed plate 21.

[0021] In this embodiment, the upper mold 2 is closed with the lower mold 1 through the guide sleeve 4 and the guide post 3, and the plastic part molding process can be carried out after the mold is closed.

[0022] Specifically, the bottom end of the gate bushing 22 is connected to the cavity flow channel of the female mold core 23, and the cavity of the female mold core 23 and the cavity of the male mold core 13 correspond to each other.

[0023] In this embodiment, the injection molding machine injects molten material into the mold cavity through the sprue bushing 22, filling the entire mold cavity and contacting the inner wall of the mold.

[0024] Specifically, the guide sleeve 4 is embedded around the female mold core 23, and the guide post 3 is embedded around the male mold core 13.

[0025] In this embodiment, the guide sleeve 4 and the guide post 3 are key components in the mold. Together they form the mold's guiding device, whose main function is to ensure the mold's guidance and positioning.

[0026] Specifically, the lower fixing plate 11 has an ejector pin hole 110 in the middle, and the return pin 17 is located around the bottom of the male mold core 13.

[0027] In this embodiment, the push rod hole 110 is a reserved hole structure, which is used to lift the lower push plate 14 through the external pin. The return pin 17 is used to cooperate with the reset spring 18 so that the push pin 16 can be reset after being pushed out.

[0028] Specifically, the support head 19 is located around the male mold core 13, and the top of the support head 19 is flush with the top of the male mold core 13.

[0029] In this embodiment, if the ejector pins 16 are not fully reset, the lower ejector plate 14 will be in an upward state, which will force the support head 19 to rise. The female mold core 23 will be blocked by the upward support head 19, causing mold closing interference.

[0030] In use, after the ejector pins 16 have fully returned to their original positions after the mold opening during injection molding, the lower ejector plate 14 will be in an upward state, which will force the support head 19 to rise. The female mold core 23 will be blocked by the upward support head 19, causing mold closing interference. Under the low-pressure protection of the machine, the mold cannot close. In this way, the mold will be protected in the event of a failure in the ejection system, saving maintenance costs. The structure is simple and easy to implement.

[0031] In summary, this anti-pressure mold protection structure, after the injection molding process, if the ejector pins 16 are not fully reset, the lower ejector plate 14 will be in an upward state, which will force the support head 19 to rise. The female mold core 23 will be blocked by the upward support head 19, causing mold closing interference. Under the low-pressure protection of the machine, the mold cannot close. In this way, in the event of a failure in the ejection system, it will protect the mold, save maintenance costs, and has a simple structure that is easy to implement.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure-resistant mold protection structure, comprising a lower mold (1) and an upper mold (2), characterized in that: The lower mold (1) is inlaid with guide pillars (3) around its perimeter, and the upper mold (2) is inlaid with guide sleeves (4) around its perimeter. The upper mold (2) is closed with the lower mold (1) through the guide sleeves (4) and guide pillars (3). The lower mold (1) includes a lower fixed plate (11), mold feet (12), male mold core (13), lower ejector plate (14), upper ejector plate (15), ejector pins (16), return pins (17), a return spring (18), and a support head (19). The mold feet (12) are fixedly installed at both ends of the lower fixed plate (11), the male mold core (13) is fixedly installed at the top of the mold feet (12), and the lower ejector plate (14) is fixedly installed at the bottom of the lower fixed plate (11). 11) The upper ejector plate (15) is fixedly installed on the lower ejector plate (14), the ejector pin (16) is embedded in the upper ejector plate (15), and its upper part extends into the cavity of the male mold core (13). The return pin (17) is embedded in the bottom of the male mold core (13). The reset spring (18) is fitted on the return pin (17). The support head (19) is movably embedded in the lower ejector plate (14), and its upper part extends into the male mold core (13).

2. The anti-pressure mold protection structure according to claim 1, characterized in that: The upper mold (2) includes an upper fixed plate (21), a sprue bushing (22) and a female mold core (23). The sprue bushing (22) is embedded in the top of the upper fixed plate (21), and the female mold core (23) is installed at the bottom of the upper fixed plate (21).

3. The anti-pressure mold protection structure according to claim 2, characterized in that: The bottom end of the gate bushing (22) is connected to the cavity flow channel of the female mold core (23), and the cavity of the female mold core (23) and the cavity of the male mold core (13) correspond to each other.

4. The anti-pressure mold protection structure according to claim 3, characterized in that: The guide sleeve (4) is embedded around the female mold core (23), and the guide post (3) is embedded around the male mold core (13).

5. The anti-pressure mold protection structure according to claim 1, characterized in that: The lower fixing plate (11) has a top rod hole (110) in the middle, and the return pin (17) is located around the bottom of the male mold core (13).

6. The anti-pressure mold protection structure according to claim 1, characterized in that: The support head (19) is located around the male mold core (13), and the top of the support head (19) is flush with the top of the male mold core (13).

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