A quick-release ejector pin plate structure for injection molded parts to prevent jamming

Abstract

This utility model provides a quick-release ejector pin plate structure for injection molded parts, relating to the field of injection molded part demolding technology. It includes a base, with two mold feet on the top of the base. A lower mold is positioned between the tops of the two mold feet, and an upper mold is positioned on the top of the lower mold. A pin plate assembly is located on the top of the base between the two mold feet. A positioning component extends into the top of the pin plate assembly, and a limiting component extends to its front side and abuts against the top of the positioning component inside the pin plate assembly. This quick-release ejector pin plate structure allows for localized heating of the ejector pins after injection molding, softening residual plastic material adhering to the ejector pin surface and preventing the ejector pins from sticking and jamming due to the cooling of residual material. This enables quick assembly and disassembly of the embedded pin plate and the backing plate. Furthermore, this structure allows for disassembly of the pin plate without the need for additional tools, significantly improving disassembly and maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of injection molding demolding technology, and in particular to an anti-jamming quick-release ejector pin plate structure for injection molding parts. Background Technology

[0002] Injection molded parts refer to all kinds of injection molded products produced by injection molding machines, including various packaging, parts, etc. They are mainly made of materials such as polyethylene or polypropylene and various organic solvents are added. The injection molding process involves pushing the heated and molten plastic raw material out of the injection molding machine and injecting it into the mold cavity of the plastic mold under high pressure. After cooling and solidification, the injection molded product is obtained.

[0003] A search revealed Chinese Patent Publication No. CN218171219U, which discloses an easy-to-demold injection mold for producing injection molded parts. The mold includes an upper sealing plate, a front mold, a rear mold, mold feet, and a lower sealing plate arranged sequentially from top to bottom. A gating system is provided between the upper sealing plate, the front mold, and the rear mold. An ejection mechanism is provided between the rear mold and the lower sealing plate. In this design, the ejector pins are installed between the bottom pin plate and the top pin plate using bolts, and the bottom pin plate is connected to a drive device. When the ejector pins need to be disassembled, the bottom pin plate must be disconnected from the drive device, and the bottom pin plate and the top pin plate must be separated. The bolt assembly and disassembly are cumbersome, significantly impacting disassembly and maintenance efficiency. Furthermore, the ejector pins are prone to adhering to residual injection molding material during use, and may become stuck after cooling, failing to meet usage requirements. Therefore, a quick-release ejector pin plate structure for injection molded parts with anti-jamming features is proposed to solve the aforementioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-jamming, quick-release ejector pin plate structure for injection molded parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A quick-release ejector pin plate structure for anti-jamming injection molded parts includes a base, two mold feet on the top of the base, a lower mold between the tops of the two mold feet, an upper mold on the top of the lower mold, a pin plate assembly between the two mold feet on the top of the base, a positioning component extending into the top of the pin plate assembly, and a limiting component extending to the front side and fitting against the top of the positioning component inside the pin plate assembly.

[0007] The needle plate assembly includes a needle plate seat, which is movably mounted on the top of the base and located between two mold feet. The needle plate seat has an embedding groove inside, and an embedding needle plate is movably mounted inside the embedding groove. A pad located at the bottom of the embedding needle plate is movably mounted inside the embedding groove. An ejector pin that penetrates into the lower mold is movably mounted at the bottom of the embedding needle plate. A needle seat is fixedly connected to the bottom of the ejector pin, and a heating wire that penetrates into the outside of the needle seat is fixedly mounted inside the ejector pin.

[0008] Preferably, two positioning posts are fixedly installed on the rear side of the inner wall of the embedding groove, extending into the interior of the embedding needle plate.

[0009] Preferably, the front side of the embedded needle plate has a groove, and the top of the pad plate is movably fitted with a support pad that fits against the bottom of the needle seat.

[0010] Preferably, both the bottom of the embedded needle plate and the top of the pad plate are provided with cable trays.

[0011] Preferably, the positioning component includes a positioning pin, which is movably mounted on the inner bottom wall of the groove and extends into the needle plate seat, and a pin head is fixedly connected to the top of the positioning pin.

[0012] Preferably, the needle plate seat, the embedded needle plate, and the pad are all provided with positioning holes that are compatible with the positioning pins.

[0013] Preferably, the limiting component includes a limiting plate, which is movably installed inside the embedded needle plate and extends through to its outer side and fits against the top of the pin head. A support plate is fixedly installed at one end of the limiting plate inside the embedded needle plate, and a reset spring is fixedly installed on the rear side of the support plate and fixedly connected to the inside of the embedded needle plate.

[0014] Preferably, the number of reset springs is several and they are evenly distributed, and the interior of the embedded needle plate is provided with a mounting groove that matches the movement trajectory of the limiting plate, the support plate and the reset spring.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This injection molded part features an anti-jamming, quick-release ejector pin plate structure. Through the design of the pin plate assembly, the ejector pins embedded in the pin plate have built-in heating wires. After injection molding, the ejector pins can be locally heated to soften the residual plastic material adhering to the surface of the ejector pins. This prevents the ejector pins from sticking and jamming due to the cooling of residual material. At the same time, the support pad provides elastic cushioning, reducing hard collisions between the ejector pins and the pin seat, and extending the service life of the part.

[0017] This injection molded part features an anti-jamming, quick-release ejector plate structure. By adopting a separate design for the ejector plate assembly, which includes an embedded groove and an embedded ejector plate, and combining dual positioning with positioning pins and positioning posts, it enables quick assembly and disassembly of the embedded ejector plate and the pad (without disassembling the base connected to the drive device as a whole). At the same time, this structure allows for the disassembly of the ejector plate without the use of additional tools, significantly improving the efficiency of disassembly, assembly, and maintenance. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of an anti-jamming quick-release ejector pin plate structure for injection molded parts provided by this utility model;

[0019] Figure 2 A perspective side view of the main body of the injection molding part anti-jamming quick-release ejector pin plate structure provided by this utility model;

[0020] Figure 3 A three-dimensional view of a needle plate assembly structure for an anti-jamming and quick-release ejector needle plate structure for injection molded parts provided by this utility model;

[0021] Figure 4 A three-dimensional view of a needle plate seat structure for an anti-jamming and quick-release ejector needle plate structure for injection molded parts provided by this utility model;

[0022] Figure 5 A perspective view of an embedded needle plate structure for an anti-jamming, quick-release ejector needle plate structure for injection molded parts provided by this utility model;

[0023] Figure 6 A perspective view of a pad structure for an anti-jamming, quick-release ejector pin plate structure for injection molded parts provided by this utility model;

[0024] Figure 7 A three-dimensional view of a limiting component structure for an anti-jamming, quick-release ejector pin plate structure for injection molded parts, provided by this utility model.

[0025] Legend: 1. Base; 2. Mold foot; 3. Lower mold; 4. Upper mold; 5. Needle plate assembly; 51. Needle plate seat; 511. Positioning pin; 52. Embedded groove; 53. Embedded needle plate; 531. Groove; 54. Pad; 541. Support pad; 55. Ejector pin; 56. Needle seat; 57. Heating wire; 571. Cable tray; 6. Positioning assembly; 61. Positioning pin; 611. Positioning hole; 62. Pin head; 7. Limiting assembly; 71. Limiting plate; 72. Support plate; 73. Return spring; 731. Mounting groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Example

[0031] like Figure 1-7 As shown, this utility model provides a technical solution: a quick-release ejector plate structure for injection molded parts with anti-jamming, including a base 1, two mold feet 2 are fixedly installed on the top of the base 1, a lower mold 3 is fixedly installed between the tops of the two mold feet 2, an upper mold 4 is movably installed on the top of the lower mold 3, and the lower mold 3 and the upper mold 4 cooperate to form an injection cavity, adopting the existing technical structure.

[0032] A needle plate assembly 5 is movably mounted on the top of the base 1, located between the two mold feet 2. The needle plate assembly 5 includes a needle plate seat 51, which is movably mounted on the top of the base 1 and located between the two mold feet 2. An embedding groove 52 is provided inside the needle plate seat 51, and an embedding needle plate 53 is movably mounted inside the embedding groove 52. Two positioning posts 511, which extend into the embedding needle plate 53, are fixedly mounted on the rear side of the inner wall of the embedding groove 52. The positioning posts 511 improve the installation stability of the embedding needle plate 53. A groove 531 is provided on the front side of the embedding needle plate 53. A pad 54 located at the bottom of the embedding needle plate 53 is movably mounted inside the embedding groove 52. An ejector pin 55 that penetrates into the lower mold 3 is movably mounted on the bottom of the embedding needle plate 53. A needle seat 56 is fixedly connected to the bottom of the ejector pin 55. A support pad 541 that fits against the bottom of the needle seat 56 is movably mounted on the top of the pad 54. The support pad 541 reduces the hard collision between the ejector pin 55 and the needle seat 56 and extends the service life of the component.

[0033] The ejector pin 55 is internally fixed with an electric heating wire 57 that extends to the outside of the needle seat 56. The bottom of the embedded needle plate 53 and the top of the pad plate 54 are both provided with wiring grooves 571. The wiring grooves 571 ensure that the wiring of the electric heating wire 57 is unobstructed. This injection molded part anti-jamming quick-release ejector pin plate structure can locally heat the ejector pin 55 after injection molding to soften the residual plastic material adhering to the ejector pin surface and prevent the ejector pin from sticking and jamming due to the cooling of the residual material.

[0034] A positioning component 6 extending into the top of the needle plate assembly 5 is movably mounted. The positioning component 6 includes a positioning pin 61, which is movably mounted on the inner bottom wall of the groove 531 and extends into the needle plate seat 51. A pin head 62 is fixedly connected to the top of the positioning pin 61. The needle plate seat 51, the embedded needle plate 53, and the pad 54 are all provided with positioning holes 611 that are compatible with the positioning pin 61. The positioning pin 61 cooperates with the positioning holes 611 on the embedded needle plate 53 to realize the positioning of the embedded needle plate 53 and prevent position displacement.

[0035] A limiting component 7, extending to its front side and abutting the top of the positioning component 6, is movably installed inside the needle plate assembly 5. The limiting component 7 includes a limiting plate 71, which is movably installed within the embedded needle plate 53, with one end extending to its outer side and abutting the top of the pin head 62. A support plate 72 is fixedly installed at one end of the limiting plate 71 inside the embedded needle plate 53. A return spring 73, fixedly connected to the interior of the embedded needle plate 53, is fixedly installed on the rear side of the support plate 72. The number of return springs 73 is several and they are evenly distributed. The embedded needle plate 53... The internal part has an installation groove 731 that is compatible with the movement trajectory of the limiting plate 71, the support plate 72 and the return spring 73. The injection molded part has an anti-jamming quick-release ejector pin plate structure. By setting the pin plate assembly 5 to adopt the split design of the embedded groove 52 and the embedded pin plate 53, combined with the dual positioning of the positioning column 511 and the positioning pin 61, the embedded pin plate 53 and the pad plate can be quickly disassembled and assembled (without the need to completely disassemble the base 1 connected to the drive device). At the same time, the structure can complete the disassembly of the pin plate without the use of additional tools, which significantly improves the efficiency of disassembly and maintenance.

[0036] The working process of this utility model:

[0037] Step 1: During the mold opening process, the ejector pin 55 is driven by an external power to move the pin plate seat 51 upward, ejecting the plastic part from the lower mold 3. At the same time, the ejector pin 55 softens the plastic part residue under the preheating of the heating wire 57, preventing the ejector pin 55 from sticking and getting stuck due to the plastic part residue.

[0038] Step 2: By pushing the limiting plate 71 away from the top of the positioning pin 61, the support plate 72 compresses the return spring 73 to retract. At this time, the positioning pin 61 is pulled out through the pin head 62, and the embedded pin plate 53 and the pad plate 54 can be pulled out laterally along the embedded groove 52. The damaged ejector pin 55 is replaced for maintenance. The wiring groove 571 ensures that the wiring of the heating wire 57 moves synchronously with the ejector pin 55 without breaking.

[0039] 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 kind of injection molded part anti-jam quick-release ejection pin plate structure, including base (1), the top of the base (1) is provided with the number of two die foot (2), the top of two die foot (2) is provided with lower mould (3), the top of the lower mould (3) is provided with upper mould (4), it is characterized by: The base (1) is provided with a needle plate assembly (5) located between two mold feet (2) at the top. The needle plate assembly (5) is provided with a positioning component (6) extending into its interior at the top. The needle plate assembly (5) is provided with a limiting component (7) extending to its front side and fitting against the top of the positioning component (6) inside its interior. The needle plate assembly (5) includes a needle plate seat (51), which is movably mounted on the top of the base (1) and located between two mold feet (2). An embedding groove (52) is provided inside the needle plate seat (51), and an embedding needle plate (53) is movably mounted inside the embedding groove (52). A pad (54) located at the bottom of the embedding needle plate (53) is movably mounted inside the embedding groove (52). A ejector pin (55) penetrating into the lower mold (3) is movably mounted at the bottom of the embedding needle plate (53). A needle seat (56) is fixedly connected to the bottom of the ejector pin (55), and an electric heating wire (57) penetrating to the outside of the needle seat (56) is fixedly mounted inside the ejector pin (55).

2. The anti-jamming quick-release ejector pin plate structure for injection molded parts according to claim 1, characterized in that: Two positioning pins (511) are fixedly installed on the rear side of the inner wall of the embedding groove (52) and extend into the embedding pin plate (53).

3. The anti-jamming quick-release ejector pin plate structure for injection molded parts according to claim 1, characterized in that: The front side of the embedded needle plate (53) is provided with a groove (531), and the top of the pad plate (54) is movably installed with a support pad (541) that fits against the bottom of the needle seat (56).

4. The anti-jamming quick-release ejector pin plate structure for injection molded parts according to claim 1, characterized in that: The bottom of the embedded needle plate (53) and the top of the pad plate (54) are both provided with cable trays (571).

5. The anti-jamming quick-release ejector pin plate structure for injection molded parts according to claim 3, characterized in that: The positioning component (6) includes a positioning pin (61), which is movably installed on the inner bottom wall of the groove (531) and extends into the needle plate seat (51). A pin head (62) is fixedly connected to the top of the positioning pin (61).

6. The anti-jamming quick-release ejector pin plate structure for injection molded parts according to claim 5, characterized in that: The needle plate seat (51), the embedded needle plate (53), and the pad (54) are all provided with positioning holes (611) that are compatible with the positioning pin (61).

7. The anti-jamming quick-release ejector pin plate structure for injection molded parts according to claim 5, characterized in that: The limiting component (7) includes a limiting plate (71), which is movably installed inside the embedded needle plate (53) and extends through to its outer side and fits against the top of the pin head (62). A support plate (72) is fixedly installed at one end of the limiting plate (71) inside the embedded needle plate (53). A return spring (73) fixedly connected to the inside of the embedded needle plate (53) is fixedly installed on the rear side of the support plate (72).

8. The anti-jamming quick-release ejector pin plate structure for injection molded parts according to claim 7, characterized in that: The number of reset springs (73) is several and they are evenly distributed. The interior of the embedded needle plate (53) is provided with a mounting groove (731) that matches the moving trajectory of the limiting plate (71), the support plate (72) and the reset springs (73).

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