Inverted injection mold with automatic demolding function

Abstract

The utility model relates to an automatic demoulding inverted injection mould in the field of injection moulds, which comprises a movable mould and a fixed mould, a top plate is arranged in the fixed mould, a return spring is arranged between the top plate and the fixed mould, an ejector pin is arranged at one end of the top plate, a first clamping block and a second clamping block are arranged on two sides of the top plate, bolt blocks are arranged on two sides of the movable mould, and the first clamping block and the second clamping block are respectively arranged on two sides of the bolt blocks. A telescopic spring is arranged between the first clamping block and the second clamping block, and guide blocks matched with the first clamping block and the second clamping block are arranged on the two sides of the fixed die. Through the cooperation of the bolt block, the first clamping block and the second clamping block, the ejector plate is driven to slide together while the movable mold moves, the ejector pin is matched with the fixed mold, an injection molding finished product is ejected out, and therefore automatic demolding is achieved. The first clamping block and the second clamping block are separated from the bolt block through cooperation of the guide block, the first clamping block and the second clamping block, the ejector plate, the first clamping block and the second clamping block are restored to the initial positions through the elastic effect of the reset spring and the telescopic spring, and the stability of the die and the accuracy of repeated use are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, specifically to an inverted injection mold with automatic demolding. Background Technology

[0002] Injection molds are specialized tools used in plastic injection molding processes. They combine a moving mold and a fixed mold to form a complete mold cavity that holds molten plastic material. Once the plastic cools and solidifies, the mold is opened and closed to shape and demold the plastic product. This not only simplifies the production process but also improves efficiency. Therefore, they are widely used in various fields such as automotive, electronics, home appliances, toys, and packaging.

[0003] While existing injection molds can achieve automatic material ejection, their cylinder-driven operation results in complex mold structures, high manufacturing costs, high energy consumption, and difficult maintenance. Therefore, this invention proposes an inverted injection mold that uses a mechanical structure to achieve automatic demolding. Summary of the Invention

[0004] This invention provides an inverted injection mold with automatic demolding, which achieves automatic demolding through the cooperation of mechanical structures, solving the problems of complex structure, high cost, high energy consumption and difficult maintenance caused by cylinder drive.

[0005] The objective of this utility model is achieved through the following means:

[0006] An inverted injection mold with automatic demolding includes a moving mold and a fixed mold. The fixed mold has a slidable top plate, and a return spring is provided between the top plate and the fixed mold. One end of the top plate has an ejector pin that cooperates with the fixed mold. Rotatable first clamping blocks and second clamping blocks are provided on both sides of the top plate. The moving mold has pin blocks on both sides that cooperate with the first clamping blocks and the second clamping blocks. The first clamping blocks and the second clamping blocks are respectively located on both sides of the pin blocks. A telescopic spring is provided between the first clamping blocks and the second clamping blocks. Guide blocks that cooperate with the first clamping blocks and the second clamping blocks are provided on both sides of the fixed mold.

[0007] Furthermore, pressure blocks are provided on both sides of the top plate, and contact sensors that cooperate with the pressure blocks are provided on both sides of the fixed mold.

[0008] Furthermore, one end of the pressing block is provided with a waist-shaped groove, and the fixed mold is provided with a fixing pin that cooperates with the waist-shaped groove.

[0009] Furthermore, both sides of the fixed mold are provided with support blocks that cooperate with the first clamping block and the second clamping block.

[0010] Furthermore, both the first clamping block and the second clamping block are provided with a connecting rod at one end, and a limiting groove is provided at one end of the connecting rod to cooperate with the telescopic spring.

[0011] Furthermore, the top plate is provided with through holes and inclined blocks that cooperate with the ejector pin, and the ejector pin is slidably mounted on the inclined blocks.

[0012] Furthermore, a counter is provided between the moving mold and the fixed mold.

[0013] The beneficial effects of this utility model are as follows: Through the cooperation of the pin block and the first and second clamping blocks, the moving mold moves while simultaneously sliding the top plate, allowing the ejector pin to engage with the fixed mold, thus ejecting the molded product from the mold and achieving automatic demolding, improving production efficiency. Furthermore, through the cooperation of the guide block and the first and second clamping blocks, the first and second clamping blocks automatically disengage from the pin block after moving a specified distance. The elastic action of the return spring and the extension spring restores the top plate and the first and second clamping blocks to their initial positions, ensuring the stability of the mold and the accuracy of repeated use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an inverted injection mold with automatic demolding according to the present invention;

[0015] Figure 2 for Figure 1 Enlarged diagram of A in the middle;

[0016] Figure 3 This is a cross-sectional view of an inverted injection mold with automatic demolding according to the present invention;

[0017] Figure 4 for Figure 3 Enlarged diagram of B in the diagram;

[0018] Figure 5 for Figure 3 Enlarged diagram of C in the middle;

[0019] Figure 6 This is a schematic diagram of the structure of the pressure block in this utility model;

[0020] Figure 7 This is a schematic diagram of the support block in this utility model;

[0021] Figure 8 This is a schematic diagram of the connecting rod in this utility model;

[0022] The reference numerals in the figure are as follows: 1-moving mold, 2-fixed mold, 3-top plate, 31-through hole, 32-slant block, 4-reset spring, 5-ejector pin, 6-first clamping block, 7-second clamping block, 8-pin block, 9-telescopic spring, 10-guide block, 11-pressure block, 111-waisted groove, 12-contact sensor, 13-fixed pin, 14-support block, 15-connecting rod, 151-limiting groove, 16-counter. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] In this embodiment, refer to Figures 1-8 The present invention relates to an inverted injection mold with automatic demolding, comprising a moving mold 1 and a fixed mold 2. The fixed mold 2 is provided with an injection pipe and a sliding top plate 3. A return spring 4 is provided between the top plate 3 and the fixed mold 2. One end of the top plate 3 is provided with an ejector pin 5 that cooperates with the fixed mold 2. Rotatable first clamping block 6 and second clamping block 7 are provided on both sides of the top plate 3. The moving mold 1 is provided with pin blocks 8 on both sides that cooperate with the first clamping block 6 and the second clamping block 7. The first clamping block 6 and the second clamping block 7 are respectively located on both sides of the pin blocks 8. A telescopic spring 9 is provided between the first clamping block 6 and the second clamping block 7. Guide blocks 10 that cooperate with the first clamping block 6 and the second clamping block 7 are provided on both sides of the fixed mold 2.

[0025] When the moving mold 1 and the fixed mold 2 are closed, the pin block 8 presses the first clamping block 6 and the second clamping block 7 outwards. After one end of the pin block 8 passes through the first clamping block 6 and the second clamping block 7, the first clamping block 6 and the second clamping block 7 are reset by the action of the telescopic spring 9, and re-adhere to the pin block 8. When the mold is opened, the first clamping block 6, the second clamping block 7, and the pin block 8 cooperate to make the top plate 3 slide with the sliding of the moving mold 1, so that the ejector pin 5 engages with the fixed mold 2, thereby smoothly removing the injection-molded product from the mold. After moving to the designated position, the first clamping block 6 and the second clamping block 7 engage with the guide block 10 respectively, so that the first clamping block 6 and the second clamping block 7 rotate and disengage from the pin block 8. Then, the elastic action of the telescopic spring 9 resets the first clamping block 6 and the second clamping block 7, thus waiting for the next mold closing operation. At the same time, since the top plate 3 loses the support of the pin block 8, it automatically returns to its original position under the action of the return spring 4, so that the ejector pin 5 moves downward, ensuring that the initial state of the mold is restored.

[0026] In addition, pressure blocks 11 are provided on both sides of the top plate 3, and contact sensors 12 that cooperate with the pressure blocks 11 are provided on both sides of the fixed mold 2. One end of the pressure block 11 is provided with a waist-shaped groove 111, and the fixed mold 2 is provided with a fixing pin 13 that cooperates with the waist-shaped groove 111. Through the cooperation of the waist-shaped groove 111 and the fixing pin 13, the pressure block 11 can be slidably installed on both sides of the top plate 3, thereby adjusting the position of the pressure block 11 to adapt to the needs of different molds. And through the cooperation of the pressure block 11 and the contact sensor 12, the system can monitor whether the top plate 3 has fully reset, thereby ensuring that the ejector pin 5 has fully reset when the mold is closed, avoiding mold damage or product quality problems caused by the ejector pin 5 not being fully reset.

[0027] Both sides of the fixed mold 2 are provided with support blocks 14 that cooperate with the first clamping block 6 and the second clamping block 7. Through the cooperation of the support blocks 14 with the first clamping block 6 and the second clamping block 7, the reset angle of the first clamping block 6 and the second clamping block 7 is limited, ensuring that each reset action is accurate and in place, thereby ensuring the stability of the mold and the safety of operation.

[0028] Both the first clamping block 6 and the second clamping block 7 have a connecting rod 15 at one end, and a limiting groove 151 at one end of the connecting rod 15 that cooperates with the telescopic spring 9. Through the limiting groove 151 on the connecting rod 15, the telescopic spring 9 can quickly connect and cooperate with the first clamping block 6 and the second clamping block 7, thereby ensuring the stability and consistency of the first clamping block 6 and the second clamping block 7 during movement through the elastic force of the telescopic spring 9.

[0029] The top plate 3 is provided with a through hole 31 and an inclined block 32 that mate with the ejector pin 5. The ejector pin 5 is slidably mounted on the inclined block 32. The inclined block 32 is fixed to the top plate 3 with bolts. Through the engagement of the ejector pin 5 with the through hole 31 and the inclined block 32, the ejector pin 5 can push the workpiece using either an inclined or straight pushing method. The inclined pushing method avoids clamping the workpiece during the ejection process, which would prevent the workpiece from falling off and affect the continuity of production.

[0030] A counter 16 is installed between the moving mold 1 and the fixed mold 2. The counter 16 automatically records the number of injection cycles, providing accurate data support for the production process. The counter 16 helps monitor the mold's usage frequency, allowing for the rational scheduling of maintenance and replacement times, ensuring production efficiency and product quality. Furthermore, the counter 16 can be connected to the control system to achieve real-time monitoring and analysis of production data, further optimizing the production process. In this way, the counter 16 not only provides real-time feedback on mold usage but also, through long-term data accumulation, analyzes mold wear trends and lifespan, thus providing a scientific basis for mold maintenance and replacement.

[0031] The beneficial effects of this utility model are as follows: Through the cooperation of the pin block 8 and the first and second clamping blocks 7, the moving mold 1 moves while simultaneously sliding the top plate 3, causing the ejector pin 5 to engage with the fixed mold 2, thus ejecting the injection-molded product from the mold and achieving automatic demolding, improving production efficiency. Furthermore, through the cooperation of the guide block 10 and the first and second clamping blocks 7, the first and second clamping blocks 7 automatically disengage from the pin block 8 after moving a specified distance. The elastic action of the return spring 4 and the extension spring 9 restores the top plate 3 and the first and second clamping blocks 7 to their initial positions, ensuring the stability of the mold and the accuracy of repeated use.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. An inverted injection mold with automatic demolding, comprising a moving mold (1) and a fixed mold (2), characterized in that: The fixed mold (2) is provided with a sliding top plate (3), and a return spring (4) is provided between the top plate (3) and the fixed mold (2). One end of the top plate (3) is provided with an ejector pin (5) that cooperates with the fixed mold (2). The top plate (3) is provided with a rotatable first clamping block (6) and a second clamping block (7) on both sides. The moving mold (1) is provided with a pin block (8) that cooperates with the first clamping block (6) and the second clamping block (7) on both sides. The first clamping block (6) and the second clamping block (7) are respectively located on both sides of the pin block (8). A telescopic spring (9) is provided between the first clamping block (6) and the second clamping block (7). The fixed mold (2) is provided with guide blocks (10) that cooperate with the first clamping block (6) and the second clamping block (7) on both sides.

2. The inverted injection mold with automatic demolding according to claim 1, characterized in that: The top plate (3) is provided with pressure blocks (11) on both sides, and the fixed mold (2) is provided with contact sensors (12) on both sides that cooperate with the pressure blocks (11).

3. The inverted injection mold with automatic demolding according to claim 2, characterized in that: One end of the pressure block (11) is provided with a waist-shaped groove (111), and the fixed mold (2) is provided with a fixing pin (13) that cooperates with the waist-shaped groove (111).

4. An inverted injection mold with automatic demolding according to any one of claims 1-3, characterized in that: The fixed mold (2) is provided with support blocks (14) on both sides to cooperate with the first clamping block (6) and the second clamping block (7).

5. The inverted injection mold with automatic demolding according to claim 1, characterized in that: Both the first clamping block (6) and the second clamping block (7) are provided with a connecting rod (15) at one end, and a limiting groove (151) is provided at one end of the connecting rod (15) to cooperate with the telescopic spring (9).

6. The inverted injection mold with automatic demolding according to claim 1, characterized in that: The top plate (3) is provided with a through hole (31) and an inclined block (32) that cooperate with the ejector pin (5), and the ejector pin (5) is slidably mounted on the inclined block (32).

7. The inverted injection mold with automatic demolding according to claim 1, characterized in that: A counter (16) is provided between the moving mold (1) and the fixed mold (2).

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