Quick-release ejector pin structure for molding dies

Abstract

The utility model relates to hot melt adhesive strip production equipment technical field, concretely is the quick demoulding thimble structure of forming mould, including base, the base top center place fixed mounting has one propelling hydraulic cylinder, propelling hydraulic cylinder piston rod fixed mounting has one mounting panel, the mounting panel top sliding installation has a plurality of horizontal mounting frames, horizontal mounting frame top sliding installation has a plurality of thimble body, the utility model discloses through the sliding installation a plurality of horizontal mounting frames on the mounting panel, and the sliding installation of multiple thimble body in horizontal mounting frame top, can set the quantity of thimble body according to the demand, and adjust the distance between two thimble bodies of adjacent, can adapt to more hot melt adhesive injection mould, the installation ring of thimble body with bristles, can sweep the surface chippings of forming part in the demoulding process, guarantees the clean inside mould storehouse.

Description

Technical Field

[0001] This utility model relates to the technical field of hot melt adhesive strip production equipment, specifically to a quick demolding ejector pin structure for molding dies. Background Technology

[0002] In modern manufacturing, molds, as key equipment for product molding, are widely used in the molding and processing of materials such as plastics, metals, and rubber. The demolding process of molding molds directly affects production efficiency, product quality, and mold lifespan. Taking hot melt adhesive injection molds as an example, they are widely used in fields such as electronic component packaging and automotive interior parts manufacturing. After each injection molding, the molded part must be smoothly removed from the mold to proceed with the next round of production.

[0003] Currently, traditional molding die demolding methods mainly employ fixed-layout ejector pin structures. The number and spacing of the ejector pins are fixed, making it difficult to flexibly adjust to different sizes and shapes of molded parts. When facing the production needs of products with various specifications, frequent replacement of the entire mold or complex modifications to the mold are required. This not only consumes a lot of time and labor costs but also reduces production efficiency, failing to meet the trend of small-batch, multi-variety production. Furthermore, traditional ejector pin structures cannot clean debris and waste remaining on the surface of the molded part and inside the mold chamber during demolding. These residues affect the precision and surface quality of subsequently molded parts, and in severe cases, can even lead to mold blockage and damage, increasing mold maintenance costs and downtime.

[0004] In view of this, we propose a quick-release ejector pin structure for molding dies. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a quick demolding ejector pin structure for molding dies.

[0006] The technical solution of this utility model is: The quick-release ejector pin structure for a molding die includes a base. A hydraulic cylinder is fixedly mounted at the center of the top of the base. A mounting plate is fixedly mounted on the piston rod of the hydraulic cylinder. Several horizontal mounting brackets are slidably mounted on the top of the mounting plate. Several ejector pin bodies are slidably mounted on the top of the horizontal mounting brackets. A pin seat is fixedly mounted on the bottom of each ejector pin body and slidably mounted on the top of the horizontal mounting brackets. A mounting ring is fixedly mounted on the outer circumference of each ejector pin body near the top. The outer circumference of the mounting ring is provided with bristles. A telescopic rod is fixedly mounted at each of the four corners of the bottom of the mounting plate, and the bottom of the telescopic rod is fixed to the base. By slidably mounting several horizontal mounting brackets on the mounting plate and slidably mounting multiple ejector pin bodies on the top of the horizontal mounting brackets, the number of ejector pin bodies can be set according to requirements, and the distance between two adjacent ejector pin bodies can be adjusted, thus adapting to more hot melt adhesive injection molds. The mounting ring with bristles on the ejector pin body can clean debris from the surface of the molded part during demolding, ensuring the cleanliness of the mold chamber.

[0007] As a preferred technical solution, the top of the mounting plate has two symmetrically formed first limiting grooves, and the bottom of the horizontal mounting frame has two symmetrically integrally formed first limiting blocks, which are slidably connected to the first limiting grooves. This serves to limit and guide the horizontal mounting frame.

[0008] As a preferred technical solution, the top of the horizontal mounting frame is provided with a second limiting groove, and the bottom of the needle seat is integrally formed with a second limiting block that is slidably connected to the second limiting groove. This provides secondary limiting and guidance for the ejector pin body.

[0009] As a preferred technical solution, a support plate is fixedly installed on one side of the top of the horizontal mounting frame. A lead screw is fixedly installed on the support plate near the center of the horizontal mounting frame. The lead screw passes through the needle holder, and an adjustment knob threadedly connected to the lead screw is rotatably installed on the needle holder. The support plate, lead screw, and adjustment knob on the needle holder cooperate to achieve fine adjustment of the position of the ejector pin body. By rotating the adjustment knob, the needle holder moves along the lead screw, allowing for flexible adjustment of the ejector pin body's extension position according to the needs of different molding dies and molded parts. This enables the ejector pin to act more precisely on the mold cavity of the injection mold, improving the adaptability and specificity of demolding and meeting diverse demolding processing needs.

[0010] As a preferred technical solution, an anti-slip plate is fixedly installed on both sides of the top of the mounting plate, and a side plate is integrally formed at both ends of the horizontal mounting frame. A positioning plate is provided below each side plate, positioned above the anti-slip plate. A pressing screw, threadedly connected to the side plate, is rotatably installed on the top of the positioning plate. Through the cooperation of the anti-slip plate on the mounting plate, the side plates of the horizontal mounting frame, the positioning plate, and the pressing screw, the horizontal mounting frame is securely fixed in place. Rotating the pressing screw causes the positioning plate to press against the side plate, firmly fixing the horizontal mounting frame to the mounting plate, preventing displacement of the horizontal mounting frame during demolding, and ensuring stable operation of the ejector pin body.

[0011] As a preferred technical solution, an anti-slip pad is fixed to the bottom of the positioning plate, and the bottom of the anti-slip pad is provided with anti-slip teeth. The anti-slip tooth design of the anti-slip pad at the bottom of the positioning plate increases the friction between the positioning plate and the mounting plate.

[0012] As a preferred technical solution, the first limiting groove is sealed at one end and open at the other end, and the second limiting groove is sealed by the support plate at the end near the support plate and open at the end away from the support plate. The design of the first and second limiting grooves being sealed at one end and open at the other end, combined with the T-shaped cross-section limiting groove and limiting block, ensures the convenience of installing the horizontal mounting bracket and the ejector pin body, and allows for quick installation and disassembly from the open end.

[0013] As a preferred technical solution, both the limiting groove and the limiting block have T-shaped cross-sections and are sized to fit each other. A fixing hole is provided at each of the four corners of the base. The T-shaped limiting groove and the limiting block with matching dimensions effectively enhance the connection stability between the horizontal mounting frame and the mounting plate, and between the ejector pin body and the horizontal mounting frame, preventing separation during demolding. Compared with the prior art, the beneficial effects of this utility model are: This utility model involves slidingly mounting several horizontal mounting brackets on a mounting plate and slidingly mounting multiple ejector pin bodies on the top of the horizontal mounting brackets. The number of ejector pin bodies can be set according to requirements, and the distance between two adjacent ejector pin bodies can be adjusted, which can accommodate more hot melt adhesive injection molds. The ejector pin body has a mounting ring with bristles, which can clean the surface debris of the molded part during demolding and ensure the cleanliness of the mold chamber. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the mounting plate in this utility model; Figure 3 This is a schematic diagram of the horizontal mounting bracket in this utility model; Figure 4 This is a schematic diagram of the structure of the ejector pin body and its connecting components in this utility model; The meanings of the labels in the diagram are as follows: 1. Base; 2. Telescopic rod; 3. Propulsion hydraulic cylinder; 4. Mounting plate; 40. First limiting groove; 41. Anti-slip plate; 5. Horizontal mounting bracket; 50. First limiting block; 51. Side plate; 52. Extrusion screw; 53. Positioning plate; 54. Anti-slip pad; 55. Second limiting groove; 56. Support plate; 57. Lead screw; 6. Ejector pin body; 60. Mounting ring; 61. Brush bristles; 62. Pin seat; 63. Second limiting block; 64. Adjustment knob. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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. Please see Figures 1-4 This utility model provides a technical solution: The quick-release ejector structure of the molding die includes a base 1. A hydraulic cylinder 3 is fixedly installed at the top center of the base 1. A mounting plate 4 is fixedly installed on the piston rod of the hydraulic cylinder 3. Several horizontal mounting brackets 5 are slidably installed on the top of the mounting plate 4. Several ejector bodies 6 are slidably installed on the top of the horizontal mounting brackets 5. A pin seat 62 is fixedly installed at the bottom of the ejector body 6. The pin seat 62 is slidably installed on the top of the horizontal mounting brackets 5. A mounting ring 60 is fixedly installed on the outer circumference of the ejector body 6 near the top. The outer circumference of the mounting ring 60 is provided with bristles 61. A telescopic rod 2 is fixedly installed at each of the four corners of the bottom of the mounting plate 4. The bottom of the telescopic rod 2 is fixed to the base 1. By sliding several horizontal mounting brackets 5 on the mounting plate 4 and sliding multiple ejector pin bodies 6 on the top of the horizontal mounting brackets 5, the number of ejector pin bodies 6 can be set according to requirements, and the distance between two adjacent ejector pin bodies 6 can be adjusted, which can accommodate more hot melt adhesive injection molds. The mounting ring 60 with brush bristles 61 on the ejector pin body 6 can clean the surface debris of the molded part during the demolding process, ensuring the cleanliness of the mold chamber.

[0016] In a preferred embodiment, the mounting plate 4 has two symmetrically formed first limiting grooves 40 on its top, and the horizontal mounting frame 5 has two symmetrically formed first limiting blocks 50 on its bottom, which are slidably connected to the first limiting grooves 40. This provides limiting and guiding functions for the horizontal mounting frame 5.

[0017] In a preferred embodiment, the top of the horizontal mounting bracket 5 is provided with a second limiting groove 55, and the bottom of the needle seat 62 is integrally formed with a second limiting block 63 that is slidably connected to the second limiting groove 55. This provides secondary limiting and guiding for the ejector pin body 6.

[0018] In a preferred embodiment, a support plate 56 is fixedly mounted on one side of the top of the horizontal mounting frame 5. A lead screw 57 is fixedly mounted on the side of the support plate 56 near the center of the horizontal mounting frame 5. The lead screw 57 passes through the needle holder 62, and an adjustment knob 64, threadedly connected to the lead screw 57, is rotatably mounted on the needle holder 62. The support plate 56, the lead screw 57, and the adjustment knob 64 on the needle holder 62 cooperate to achieve fine adjustment of the position of the ejector pin body 6. By rotating the adjustment knob 64, the needle holder 62 is moved along the lead screw 57, which allows for flexible adjustment of the extension position of the ejector pin body 6 according to the needs of different molding dies and molded parts. This enables the ejector pin to act more accurately on the mold cavity of the injection mold, improving the adaptability and targeting of demolding and meeting diverse demolding processing needs.

[0019] In a preferred embodiment, an anti-slip plate 41 is fixedly installed on both sides of the top of the mounting plate 4, and a side plate 51 is integrally formed at both ends of the horizontal mounting frame 5. A positioning plate 53 is provided below each side plate 51, and the positioning plate 53 is located above the anti-slip plate 41. A pressing screw 52, ​​which is threadedly connected to the side plate 51, is rotatably installed on the top of the positioning plate 53. Through the cooperation of the anti-slip plate 41 on the mounting plate 4, the side plates 51 of the horizontal mounting frame 5, the positioning plate 53, and the pressing screw 52, ​​the horizontal mounting frame 5 is firmly fixed in place. Rotating the pressing screw 52 can cause the positioning plate 53 to press the side plate 51, firmly fixing the horizontal mounting frame 5 to the mounting plate 4, preventing the horizontal mounting frame 5 from shifting during demolding, and ensuring the stable operation of the ejector pin body 6.

[0020] In a preferred embodiment, an anti-slip pad 54 is fixed to the bottom of the positioning plate 53, and the bottom of the anti-slip pad 54 is provided with anti-slip teeth. The anti-slip tooth design of the anti-slip pad 54 at the bottom of the positioning plate 53 increases the friction between the positioning plate 53 and the mounting plate 4.

[0021] In a preferred embodiment, the first limiting groove 40 is sealed at one end and open at the other, while the second limiting groove 55 is sealed by the support plate 56 at the end near the support plate 56 and open at the end away from the support plate 56. The design of the first limiting groove 40 and the second limiting groove 55 being sealed at one end and open at the other, combined with the T-shaped cross-section limiting groove and limiting block, ensures the ease of installation of the horizontal mounting bracket 5 and the ejector pin body 6, allowing for quick installation and disassembly from the open end.

[0022] In this preferred embodiment, both the limiting groove and the limiting block have T-shaped cross-sections and are sized to fit each other. A fixing hole is provided at each of the four corners of the base 1. The T-shaped cross-sections and sized limiting grooves and limiting blocks effectively enhance the connection stability between the horizontal mounting frame 5 and the mounting plate 4, and between the ejector pin body 6 and the horizontal mounting frame 5, preventing separation during demolding. In the quick-release ejector pin structure of this utility model, during the installation stage, according to the specific requirements of the molding die, the horizontal mounting bracket 5 is slid into the first limiting groove 40 at the top of the mounting plate 4 via the first limiting block 50 at the bottom. Utilizing the limiting characteristics of the T-shaped structure, the horizontal mounting bracket 5 is stably positioned on the mounting plate 4. Subsequently, the pin seat 62 at the bottom of the ejector pin body 6 is slidably engaged with the second limiting groove 55 at the top of the horizontal mounting bracket 5 via the second limiting block 63, completing the installation of the ejector pin body 6. If fine-tuning of the position of the ejector pin body 6 is required, the adjustment knob 64 on the pin seat 62 can be rotated. Under the transmission action of the lead screw 57, the pin seat 62 drives the ejector pin body 6 to move laterally along the horizontal mounting bracket 5, precisely adjusting the extension position of the ejector pin body 6 so that it accurately corresponds to the demolding point of the molded part in the mold chamber.

[0023] After the position is adjusted, rotate the extrusion screw 52 on the top of the positioning plate 53 to press the side plate 51 of the horizontal mounting frame 5 downwards. At the same time, the anti-slip teeth of the anti-slip pad 54 at the bottom of the positioning plate 53 tightly bite the surface of the mounting plate 4. Together with the anti-slip plates 41 on both sides of the mounting plate 4, the horizontal mounting frame 5 is firmly fixed on the mounting plate 4 to prevent the horizontal mounting frame 5 from shifting during the demolding process.

[0024] During the demolding process, the hydraulic cylinder 3 is activated, and the piston rod extends to push the mounting plate 4 upward. The mounting plate 4 then moves the horizontal mounting bracket 5 and the ejector pin body 6, which are fixed on it, upward simultaneously. The ejector pin body 6 precisely presses the molded part inside the mold, separating it from the mold and completing the demolding action. During this process, the mounting ring 60 and brush bristles 61 on the ejector pin body 6 clean the surface of the molded part and the mold chamber, promptly removing residual debris, keeping the inside of the mold clean, and preventing debris from affecting the subsequent molding quality.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quick-release ejector pin structure for a molding die, characterized in that: The device includes a base (1), a hydraulic cylinder (3) is fixedly installed at the top center of the base (1), a mounting plate (4) is fixedly installed on the piston rod of the hydraulic cylinder (3), a number of horizontal mounting brackets (5) are slidably installed on the top of the mounting plate (4), a number of ejector pin bodies (6) are slidably installed on the top of the horizontal mounting brackets (5), a needle seat (62) is fixedly installed at the bottom of the ejector pin body (6), the needle seat (62) is slidably installed on the top of the horizontal mounting brackets (5), a mounting ring (60) is fixedly installed on the outer circumference of the ejector pin body (6) near the top, the outer circumference of the mounting ring (60) is provided with bristles (61), and a telescopic rod (2) is fixedly installed at each of the four corners of the bottom of the mounting plate (4), the bottom of the telescopic rod (2) is fixed to the base (1).

2. The quick-release ejector pin structure of the molding die as described in claim 1, characterized in that: The mounting plate (4) has two first limiting grooves (40) symmetrically opened on the top, and the horizontal mounting bracket (5) has two first limiting blocks (50) symmetrically integrally formed on the bottom, and the first limiting blocks (50) are slidably connected to the first limiting grooves (40).

3. The quick-release ejector pin structure of the molding die as described in claim 2, characterized in that: The top of the horizontal mounting bracket (5) is provided with a second limiting groove (55), and the bottom of the needle seat (62) is integrally formed with a second limiting block (63) that is slidably connected to the second limiting groove (55).

4. The quick-release ejector pin structure of the molding die as described in claim 3, characterized in that: A support plate (56) is fixedly installed on one side of the top of the horizontal mounting frame (5). A lead screw (57) is fixedly installed on the side of the support plate (56) near the center of the horizontal mounting frame (5). The lead screw (57) passes through the needle seat (62). An adjustment knob (64) that is threadedly connected to the lead screw (57) is rotatably installed on the needle seat (62).

5. The quick-release ejector pin structure of the molding die as described in claim 4, characterized in that: An anti-slip plate (41) is fixedly installed on both sides of the top of the mounting plate (4). A side plate (51) is integrally formed at both ends of the horizontal mounting bracket (5). A positioning plate (53) is provided below each side plate (51). The positioning plate (53) is located above the anti-slip plate (41). A pressing screw (52) that is threadedly connected to the side plate (51) is rotatably installed on the top of the positioning plate (53).

6. The quick-release ejector pin structure of the molding die as described in claim 5, characterized in that: The bottom of the positioning plate (53) is fixed with an anti-slip pad (54), and the bottom of the anti-slip pad (54) is provided with anti-slip teeth.

7. The quick-release ejector pin structure of the molding die as described in claim 6, characterized in that: The first limiting groove (40) is sealed at one end and open at the other end. The second limiting groove (55) is sealed by the support plate (56) at one end near the support plate (56) and open at the other end away from the support plate (56).

8. The quick-release ejector pin structure of the molding die as described in claim 7, characterized in that: The limiting groove and the limiting block are both T-shaped and have corresponding sizes. The base (1) has a fixing hole at each of its four corners.

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