Straight-ejection springback demolding mechanism and mold

Abstract

The utility model provides a straight ejection rebounding demoulding mechanism and mould, relates to demoulding mechanism technical field, straight ejection rebounding demoulding mechanism includes back pulling insert, pull rod, ejector rod, tilting block and briquetting, in the mould opening process, ejector pin push plate drives the briquetting to be far away from tilting block, through the transmission of transmission structure, one side of tilting block rises, and one side connected with ejector rod falls, and the ejection rod and the briquetting push plate push the briquetting to be far away from the tilting block. After the pull rod loses the pressure effect of the ejector rod, the rear pulling insert is pulled downwards to act under the action of the spring, the rear pulling insert retreats to complete the auxiliary demolding action, the overall structure is simple and reliable, demolding is convenient, ejection of an ejector pin and an ejector sleeve is not needed, assistance of a core pulling mechanism can be achieved, and the better demolding effect is achieved. The probability of poor ejection is reduced, the product quality is improved, and the mold cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of demolding mechanism technology, and in particular to a direct-push springback demolding mechanism and mold. Background Technology

[0002] Currently, common demolding solutions in injection molds include ejector pins, ejector sleeves, and core pulling. These demolding solutions all have certain defects. Ejector pins and ejector sleeves are difficult to process due to their shape characteristics and are prone to poor ejection. Core pulling mechanisms have complex mold structures and high mold costs. In order to address the above defects, this application is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a direct-push springback demolding mechanism and mold, which solves the problems of demolding and ejection difficulties, improves product quality, and reduces mold costs.

[0004] To solve the above problems, this utility model provides a direct-push springback demolding mechanism, including a rear pull insert, a pull rod, a push rod, a rocker block, and a pressure block. The rear pull insert is connected to the pull rod, the rocker block is rotatably mounted, the push rod is connected to one side of the rotation center of the rocker block, and a transmission structure is provided on the other side of the rotation center of the rocker block. During the mold opening process, the pressure block moves away from the rocker block, and the transmission structure causes one side of the rocker block to rise while the side connected to the push rod falls, so that the push rod no longer applies pressure to the pull rod. After the pull rod loses the pressure of the push rod, it pulls the rear pull insert downward to complete the auxiliary demolding action.

[0005] According to one embodiment of the present invention, the pull rod is connected to the elastic element. Before the mold is opened, the elastic element is in a compressed state. When the push rod descends and no longer applies pressure to the pull rod, the pull rod is pulled by the elastic element and then the insert is pulled out.

[0006] Optionally, the rocker block and the push rod can be directly connected, and any structure that can achieve the effect of the push rod rising vertically when one end of the rocker block rises is acceptable.

[0007] Preferably, the rocker block and the push rod are connected by a connecting key, and the two ends of the connecting key are respectively hinged to the rocker block and the push rod by rotating pins.

[0008] Optionally, the rear insert and the pull rod are connected by a headless screw, or by snap-fit, adhesive or other means.

[0009] Optionally, the rocker block and the pressure block can be connected by direct or non-direct drive. Preferably, the drive structure is a barb structure on the rocker block and a hook structure that cooperates with the barb structure on the pressure block. When the pressure block rises, the hook structure and the barb structure cooperate to hook one end of the rocker block to rise. During the subsequent rise of the pressure block, the hook structure and the barb structure can be disengaged.

[0010] According to one embodiment of the present invention, the rocking block is installed in the housing by a rotating pin.

[0011] According to one embodiment of the present invention, the elastic element is a spring, but other elastic materials may also be used.

[0012] According to one embodiment of the present invention, the spring is mounted on the pull rod.

[0013] According to one embodiment of the present invention, a limiting structure is provided on the pull rod, and the limiting structure is a protruding disc-shaped structure provided at the bottom of the pull rod.

[0014] A mold includes the above-mentioned direct-push springback demolding mechanism, wherein the housing is mounted on the bottom plate of the mold, the pressure block is mounted on the ejector plate, and the rear insert is disposed in the movable side insert.

[0015] The beneficial effects of this utility model are that, by setting up a rear-pull insert, a pull rod, an ejector rod, a rocker block, and a pressure block, during the mold opening process, the ejector pin push plate drives the pressure block away from the rocker block. Through the transmission structure, one side of the rocker block rises, while the side connected to the ejector rod falls, so that the ejector rod no longer applies pressure to the pull rod. After the pull rod loses the pressure from the ejector rod, it pulls the rear-pull insert downward under the action of the spring. The rear-pull insert retracts to complete the auxiliary demolding action. The overall structure is simple and reliable, and demolding is convenient. It does not require ejector pins or sleeve ejection. It can be used in conjunction with a core-pulling mechanism to achieve better demolding effect, reduce the probability of ejection defects, improve product quality, and reduce mold costs. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of the direct-push springback demolding mechanism;

[0018] Figure 2 An exploded view of the direct-push springback demolding mechanism;

[0019] Figure 3 This is a structural diagram of the rear-draw insert, tie rod, and elastic element.

[0020] Figure 4 This is a schematic diagram of the overall structure when the mold is closed;

[0021] Figure 5 A schematic diagram of the structure at the top rod, rocking block, and pressure block;

[0022] Figure 6 This is a schematic diagram of the structure during mold opening. Detailed Implementation

[0023] The following description is only intended to disclose the present invention so that those skilled in the art can implement it. The embodiments in the following description are merely examples, and those skilled in the art will conceive of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.

[0024] Direct-acting springback demolding mechanism and mold, such as Figure 1 , Figure 2 It includes a rear pull insert 1, a pull rod 3, an elastic element 4, a push rod 5, a connecting key 7, a rocker block 8, and a pressure block 6.

[0025] The rear insert 1 is connected to the pull rod 3 by a headless screw 2. The pull rod 3 is connected to the elastic element 4, which is a spring. The spring is fitted onto the pull rod 3. A limit structure 31 is provided on the pull rod 3. The limit structure 31 is a protruding disc-shaped structure set at the bottom of the pull rod 3, which is used to limit the position of the spring and also to limit the movement of the pull rod 3.

[0026] Before the mold is opened, the elastic element 4 is in a compressed state. When the ejector rod 5 descends and no longer applies pressure to the pull rod 3, the pull rod 3 is pulled by the elastic element 4 and the insert 1 is pulled out.

[0027] The rocker block 8 is installed in the housing 9 by a rotating pin, and the push rod 5 is connected to one side of the rotation center of the rocker block 8 by a connecting key 7. The two ends of the connecting key 7 are respectively hinged to the rocker block 8 and the push rod 5 by the rotating pin.

[0028] A transmission structure 81 is provided on the other side of the rotation center of the rocker block 8. In this embodiment, the transmission structure 81 is a barb structure provided on the rocker block 8.

[0029] The pressure block 6 is provided with a hook-shaped structure 61 that cooperates with the barbed structure. When the pressure block 6 rises, the hook-shaped structure 61 and the barbed structure cooperate to hook one end of the rocker block 8 to rise. During the subsequent rise of the pressure block 6, the hook-shaped structure 61 and the barbed structure can be separated.

[0030] A mold includes the above-mentioned direct-push spring-back demolding mechanism, wherein the housing 9 is mounted on the bottom plate 13 of the mold, the pressure block 6 is mounted on the ejector plate 12, the rear insert 1, the pull rod 3 and the elastic member 4 are movably arranged in the movable side insert 10, and the ejector rod 5 passes through the ejector plate 12 and the ejector plate 11 and contacts the bottom of the pull rod 3 in the movable side insert 10 for transmission.

[0031] like Figure 5 , Figure 6 During the mold opening process, the ejector plate 12 drives the pressure block 6 away from the rocker block 8. Through the transmission structure 81, one side of the rocker block 8 rises, while the side connected to the ejector rod 5 falls. This causes the ejector rod 5 to fall and no longer apply pressure to the pull rod 3. After the pull rod 3 loses the pressure from the ejector rod 5, it is pulled downward by the spring, causing the insert 1 to move backward. The backward movement distance of the insert 1 is as follows: Figure 3 The distance shown at point A is such that the insert 1 is pulled back to complete the auxiliary demolding action.

[0032] like Figure 4 During the mold closing process, the ejector plate 12 drives the pressure block 6 to close the mold downwards, and the rocker block 8 moves to make the ejector rod 5 move upwards.

[0033] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations and modifications.

Claims

1. A direct-push springback demolding mechanism, characterized in that: The mold includes a rear pull insert (1), a pull rod (3), a push rod (5), a rocker block (8), and a pressure block (6). The rear pull insert (1) is connected to the pull rod (3). The rocker block (8) is rotatably installed. The push rod (5) is connected to one side of the rotation center of the rocker block (8). A transmission structure (81) is provided on the other side of the rotation center of the rocker block (8). During the mold opening process, the pressure block (6) moves away from the rocker block (8). The transmission structure (81) drives the rocker block (8) to rise on one side and fall on the other side, so that the push rod (5) falls and no longer applies pressure to the pull rod (3). The pull rod (3) pulls the rear pull insert (1) to move.

2. The direct-push springback demolding mechanism according to claim 1, characterized in that: The pull rod (3) is connected to the elastic element (4). When the top rod (5) descends and no longer applies pressure to the pull rod (3), the pull rod (3) is pulled by the elastic element (4) and the insert (1) is activated.

3. The direct-push springback demolding mechanism according to claim 1, characterized in that: The rocker block (8) and the push rod (5) are connected by a connecting key (7).

4. The direct-push springback demolding mechanism according to claim 1, characterized in that: The rear insert (1) is connected to the pull rod (3) by a headless screw (2).

5. The direct-push springback demolding mechanism according to claim 1 or 2, characterized in that: The transmission structure (81) is a barb structure set on the rocker block (8), and the pressure block (6) is provided with a hook-shaped structure (61) that cooperates with the barb structure.

6. The direct-push springback demolding mechanism according to claim 1, characterized in that: The rocker block (8) is installed in the housing (9).

7. The direct-push springback demolding mechanism according to claim 2, characterized in that: The elastic element (4) is a spring.

8. The direct-push springback demolding mechanism according to claim 7, characterized in that: The spring is mounted on the pull rod (3).

9. The direct-push springback demolding mechanism according to claim 8, characterized in that: A limit structure (31) is provided on the pull rod (3).

10. A mold, characterized in that: Includes the direct-push springback demolding mechanism as described in any one of claims 1-9.

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