Secondary ejection mechanism of plastic key injection mold

Abstract

The utility model discloses a secondary ejection mechanism of a plastic key injection mold, which relates to the technical field of injection molds, and comprises a bottom plate and an ejection plate, the upper surface of the bottom plate is fixedly connected with a movable mold, the upper surface of the movable mold is provided with a groove, and the inner wall of the movable mold is slidably connected with a first ejector pin relative to the position of the groove; a second ejector pin is slidably connected to the position, opposite to one side of the first ejector pin, of the inner wall of the movable mold, an upper mold is fixedly connected to the lower surface of the top plate and located above the movable mold, a material pushing structure is arranged on one side of the movable mold and comprises a fixing plate, a long arm of the fixing plate is fixedly connected with the movable mold, and the long arm of the fixing plate is fixedly connected with the movable mold. According to the secondary ejection mechanism of the plastic key injection mold, the effect of pushing a plastic key out of the space between the movable mold and the upper mold after secondary ejection is achieved, and the problems that the key is still located between the movable mold and the upper mold after secondary ejection and is inconvenient to take, the injection molding efficiency is reduced, and meanwhile, the working danger of personnel is increased are solved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a secondary ejection mechanism for a plastic button injection mold. Background Technology

[0002] As the name suggests, an injection mold is a mold used for injection molding. In the production of plastic buttons, injection molds are also needed for injection molding. They generally consist of a moving mold, a groove, an upper mold, ejector pins, an ejector plate, and a gating system. After the upper mold and the moving mold are fitted together, the gating system pours liquid plastic into the groove to form the button shape. Due to the special nature of the button, it is ejected a second time by multiple ejector pins.

[0003] Existing technologies, such as the utility model patent with announcement number CN208035263U, disclose a secondary ejection mechanism for injection mold ejector pins, including a first ejector pin, a second ejector pin, a fixed plate, a movable mediator, a hook, a stop rod, and a limiting post. The lower ends of the first and second ejector pins are respectively fixed to the first and second ejector pins. The first ejector pin overlaps the top surface of the second ejector pin. The fixed plate is fixedly installed inside the first ejector pin. The movable mediator is movably sleeved inside the fixed plate. The lower end of the hook is movably inserted through the fixed plate, and the hook slot can engage with one end of the movable mediator. The other end of the movable mediator can engage with the stop rod slot. The upper end of the limiting post is fixed to the moving mold, and the lower end of the limiting post is gapped through the second ejector pin and abuts against the first ejector pin. This solves the problem of controlling the demolding sequence of the product from the mold cavity.

[0004] The aforementioned and existing related technologies often have the following drawbacks: After the plastic button is ejected twice by the first and second ejector pins, the button is located between the moving mold and the top mold. Therefore, personnel need to manually remove the button and re-inject it. During this process, the personnel's actions of picking up and retrieving the button are cumbersome, and there is a certain danger in reaching between the moving mold and the top mold. This not only reduces the injection efficiency of plastic buttons but also greatly increases the danger to personnel.

[0005] To address this, we propose a secondary ejection mechanism for plastic button injection molds. Utility Model Content

[0006] The purpose of this invention is to provide a secondary ejection mechanism for plastic button injection molds to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a secondary ejection mechanism for a plastic button injection mold, comprising a base plate and a top plate. A moving mold is fixedly connected to the upper surface of the base plate. A groove is formed on the upper surface of the moving mold. A first ejector pin is slidably connected to the inner wall of the moving mold relative to the groove. A second ejector pin is slidably connected to the inner wall of the moving mold relative to one side of the first ejector pin. An upper mold is fixedly connected to the lower surface of the top plate. The upper mold is located above the moving mold. A pusher structure is provided on one side of the moving mold. The pusher structure includes a fixed plate. The long arm of the fixed plate is fixedly connected to the moving mold. A locking hole is formed on the short arm of the fixed plate. Two long rods slide through the short arm of the fixed plate. A connecting plate is fixedly connected to one end of the two long rods. The connecting plate is located above the groove. An inclined plate is fixedly connected to the upper surface of the connecting plate. A hook is rotatably connected to the other side of the inclined plate. The inner wall of the hook is slidably connected to the locking hole. A first spring is fixedly connected to the side of the connecting plate near the fixed plate. The other end of the first spring is fixedly connected to the short arm of the fixed plate.

[0008] The aforementioned component achieves the effect of pushing the plastic button out between the moving mold and the upper mold after the second ejection, thereby minimizing the problem of the button remaining between the moving mold and the upper mold after the second ejection, which would be inconvenient to remove, reduce injection molding efficiency, and increase the danger to workers.

[0009] Preferably, a sphere is fixedly connected to the end of each of the two long rods away from the connecting plate, and the arc surface of the sphere abuts against the fixed plate.

[0010] The effect achieved by the above components is that the long rod drives the ball to fit against the end wall of the fixed plate, and the ball prevents the long rod from detaching from the fixed plate.

[0011] Preferably, the arc surfaces of the two spheres are fixedly connected to a pull rod, and the arc surface of the hook is provided with a pull groove.

[0012] The effect achieved by the above-mentioned components is that the grooved mechanism allows the hook to disengage from the inner wall of the hole, and the grooved mechanism achieves a better effect on rotating the hook.

[0013] Preferably, a triangular strip is fixedly connected to the side of the connecting plate away from the first spring, and a push plate is fixedly connected to the inclined surface of the triangular strip.

[0014] The effect achieved by the above components is that the triangular bar drives the push plate to push out the tilted button, and the triangular bar can tilt the button to facilitate quick push-out and prevent it from getting stuck on the second ejector pin.

[0015] Preferably, a collection structure is provided on one side of the base plate. The collection structure includes an extension plate, one side of which is fixedly connected to the base plate. A collection frame is placed on the upper surface of the base plate. Two connecting rods are fixedly connected to one side of the moving mold. An arc plate is fixedly connected to the side of the two connecting rods that are close to each other. The arc plate is located above the collection frame.

[0016] The aforementioned components achieve the following effect: they collect the ejected buttons, effectively preventing them from flying out of the device due to excessive speed after ejection, increasing collection strength while preventing the buttons from falling to the ground and causing damage, thereby improving the practicality of the device.

[0017] Preferably, a plurality of second springs are uniformly fixedly connected to the inner wall of the collection frame, and a support plate is fixedly connected to the other end of the plurality of second springs. A protective pad is fixedly connected to the upper surface of the support plate.

[0018] The effect achieved by the above components is that the second spring lifts the protective pad to a certain height through the support plate, and the support plate shortens the distance between the arc plate and the collection frame to minimize collisions.

[0019] Preferably, the lower surface of the collection frame abuts against the extension plate, and the pad is a sponge pad.

[0020] The effect achieved by the above components is to better protect the buttons from falling by using a sponge pad.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] This invention, through the design of a pusher structure, achieves the effect of ejecting the plastic button after secondary ejection between the moving mold and the upper mold. The cooperation of the triangular strip and the push plate not only pushes the button temporarily stuck on the second ejector pin but also quickly ejects it between the moving mold and the upper mold. This eliminates the need for personnel to reach in and retrieve the button after injection molding, effectively reducing the risk of injury during operation and improving the injection molding efficiency of plastic buttons. Furthermore, this invention, through the design of a collection structure, effectively collects the ejected button, preventing it from flying out of the equipment due to excessive speed. This increases the collection strength and prevents the button from falling and breaking, thus improving the practicality of the device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This utility model Figure 1 A partial structural diagram;

[0025] Figure 3 This utility model Figure 2A partial structural diagram;

[0026] Figure 4 This is a partial side view of the structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the protective pad of this utility model.

[0028] In the diagram: 1. Base plate; 2. Moving mold; 3. Groove; 4. First ejector pin; 5. Second ejector pin; 6. Top plate; 7. Upper mold; 8. Pushing structure; 801. Fixing plate; 802. Clip hole; 803. Long rod; 804. Connecting plate; 805. Inclined plate; 806. Hook; 807. First spring; 808. Ball; 809. Pull rod; 810. Pull groove; 811. Triangular strip; 812. Push plate; 9. Collecting structure; 91. Extension plate; 92. Collecting frame; 93. Connecting rod; 94. Arc plate; 95. Second spring; 96. Support plate; 97. Protective pad. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a secondary ejection mechanism for a plastic button injection mold, including a base plate 1 and a top plate 6. A moving mold 2 is fixedly connected to the upper surface of the base plate 1. A groove 3 is formed on the upper surface of the moving mold 2. A first ejector pin 4 is slidably connected to the inner wall of the moving mold 2 relative to the groove 3. A second ejector pin 5 is slidably connected to the inner wall of the moving mold 2 relative to one side of the first ejector pin 4. An upper mold 7 is fixedly connected to the lower surface of the top plate 6. The upper mold 7 is located above the moving mold 2. A pusher structure 8 is provided on one side of the moving mold 2, which achieves the effect of pushing the plastic button out between the moving mold 2 and the upper mold 7 after secondary ejection. This avoids the problem of the button remaining between the moving mold 2 and the upper mold 7 after secondary ejection, making it inconvenient to pick up and reducing injection efficiency while increasing the danger to personnel. A collecting structure 9 is provided on one side of the base plate 1, which achieves the effect of collecting the ejected button, effectively preventing the button from flying out of the equipment due to excessive speed after ejection, improving the collecting strength and preventing the button from falling and breaking, thereby improving the practicality of the device.

[0031] The following section will explain the specific design and function of its pushing structure 8 and collecting structure 9.

[0032] like Figure 2 and Figure 3 as well as Figure 4 As shown, the pusher structure 8 includes a fixed plate 801. The long arm of the fixed plate 801 is fixedly connected to the moving mold 2. The short arm of the fixed plate 801 has a locking hole 802. Two long rods 803 slide through the short arm of the fixed plate 801. A connecting plate 804 is fixedly connected to one end of the two long rods 803. The connecting plate 804 is located above the groove 3. An inclined plate 805 is fixedly connected to the upper surface of the connecting plate 804. A hook 806 is rotatably connected to the other side of the inclined plate 805. The inner wall of the hook 806 is connected to the locking hole. 802 is slidably connected. A first spring 807 is fixedly connected to the side of the connecting plate 804 near the fixed plate 801. The other end of the first spring 807 is fixedly connected to the short arm of the fixed plate 801. A ball 808 is fixedly connected to the end of each of the two long rods 803 away from the connecting plate 804. The arc surface of the ball 808 abuts against the fixed plate 801. The long rods 803 drive the ball 808 to fit against the end wall of the fixed plate 801. The ball 808 plays the role of preventing the long rods 803 from detaching from the fixed plate 801.

[0033] Two spheres 808 are fixedly connected to a pull rod 809 on their arc surfaces. The arc surface of the hook 806 is provided with a groove 810. The hook 806 is rotated by the groove 810 to disengage from the inner wall of the hole 802. The groove 810 achieves a better effect of rotating the hook 806. A triangular strip 811 is fixedly connected to the side of the connecting plate 804 away from the first spring 807. A push plate 812 is fixedly connected to the inclined surface of the triangular strip 811. The triangular strip 811 drives the push plate 812 to push out the tilted button. The triangular strip 811 can tilt the button to facilitate quick push-out and prevent it from getting stuck on the second ejector pin 5.

[0034] like Figure 4 and Figure 5 As shown, the collecting structure 9 includes an extension plate 91, one side of which is fixedly connected to the base plate 1. A collecting frame 92 is placed on the upper surface of the base plate 1. Two connecting rods 93 are fixedly connected to one side of the moving mold 2. An arc plate 94 is fixedly connected to the side of the two connecting rods 93 that are close to each other. The arc plate 94 is located above the collecting frame 92. Several second springs 95 are evenly fixedly connected to the inner wall of the collecting frame 92. A support plate 96 is fixedly connected to the other end of the several second springs 95. A protective pad 97 is fixedly connected to the upper surface of the support plate 96. The second springs 95 lift the protective pad 97 to a certain height through the support plate 96. The support plate 96 shortens the distance between the arc plate 94 and the collecting frame 92 to prevent collisions as much as possible. The lower surface of the collecting frame 92 abuts against the extension plate 91. The protective pad 97 is a sponge pad, which helps to better protect the button from falling.

[0035] Working principle: When the plastic button needs to be injection molded, the top plate 6 will drive the upper mold 7 to approach the moving mold 2 until they are completely fitted. Then, after heating, the injection liquid enters the groove 3 through the moving mold 2. The fitting of the groove 3 of the moving mold 2 and the upper mold 7 forms the plastic button after injection molding. After the upper mold 7 separates from the moving mold 2, the first ejector pin 4 and the second ejector pin 5 move upward, and at the same time, the first ejector pin 4 and the second ejector pin 5 lift up the button. When the first ejector pin 4 touches the inner limit post of the moving mold 2, the first ejector pin 4 stops moving, and the second ejector pin 5 continues to move upward, pushing the button out of the groove 3 for the second time. At this time, the pull groove 810 rotates the hook 806, and the pull groove 810 achieves a better effect of rotating the hook 806. The hook 806 is disengaged from the inner wall of the hole 802 by rotating the inclined plate 805. At this time, the first spring 807 is in the unfolded state, driving the connecting plate 804 to move. The long rod 803 drives the pull rod 809 to move through the connecting plate 804 and the ball 808. The triangular strip 811 drives the push plate 812 to move through the connecting plate 804. The triangular strip 811 can tilt the button. The inclined surface facilitates quick ejection and prevents the button from getting stuck on the second ejector pin 5. After the triangular bar 811 approaches the button, it pushes the button to tilt using its own inclined surface. The button then contacts the push plate 812, at which point the push plate 812 pushes the button again, causing the button to be ejected between the moving mold 2 and the upper mold 7. Meanwhile, the arc surface of the ball 808 fits against the end wall of the fixed plate 801. The ball 808 prevents the long rod 803 from detaching from the fixed plate 801 and is collected by the collecting structure 9. This completes the ejection of the button after the second ejection of the injection molding, effectively preventing personnel from reaching between the moving mold 2 and the upper mold 7 to retrieve the button, providing a certain level of safety while improving the button injection molding efficiency.

[0036] When it is necessary to collect the ejected buttons, the collection frame 92 is first moved to the upper surface of the base plate 1 and the extension plate 91. After the triangular bar 811 and the push plate 812 push the buttons out, the buttons slide down along the inner wall of the arc surface and slide to the upper surface of the inner pad 97 of the collection frame 92. The pad 97, which is a sponge pad, achieves a better protection effect for the buttons after they fall. The weight of the multiple buttons after they slide down causes the second spring 95 to be squeezed by the support plate 96 through the pad 97. The support plate 96 shortens the distance between the arc plate 94 and the collection frame 92 to prevent collisions as much as possible. At this time, the second spring 95 is in a compressed state, thereby slowly lowering the height of the pad 97 and collecting more buttons.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] 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 secondary ejection mechanism for a plastic button injection mold, comprising a base plate (1) and a top plate (6), characterized in that: A moving mold (2) is fixedly connected to the upper surface of the base plate (1). A groove (3) is provided on the upper surface of the moving mold (2). A first ejector pin (4) is slidably connected to the inner wall of the moving mold (2) relative to the groove (3). A second ejector pin (5) is slidably connected to the inner wall of the moving mold (2) relative to the side of the first ejector pin (4). An upper mold (7) is fixedly connected to the lower surface of the top plate (6). The upper mold (7) is located above the moving mold (2). A pusher structure (8) is provided on one side of the moving mold (2). The pusher structure (8) includes a fixed plate (801). The long arm of the fixed plate (801) is fixedly connected to the moving mold (2). The short arm of the fixed plate (801) is provided with a pusher structure (8). There is a card hole (802), and the short arm of the fixing plate (801) slides through two long rods (803). One end of the two long rods (803) is fixedly connected to a connecting plate (804). The connecting plate (804) is located above the groove (3). The upper surface of the connecting plate (804) is fixedly connected to an inclined plate (805). The other side of the inclined plate (805) is rotatably connected to a hook (806). The inner wall of the hook (806) is slidably connected to the card hole (802). The side of the connecting plate (804) near the fixing plate (801) is fixedly connected to a first spring (807). The other end of the first spring (807) is fixedly connected to the short arm of the fixing plate (801).

2. The secondary ejection mechanism for a plastic button injection mold according to claim 1, characterized in that: Both of the long rods (803) have a ball (808) fixedly connected to one end away from the connecting plate (804), and the arc surface of the ball (808) abuts against the fixed plate (801).

3. The secondary ejection mechanism for a plastic button injection mold according to claim 2, characterized in that: The two spheres (808) are fixedly connected to the arc surfaces of the pull rod (809), and the arc surface of the hook (806) is provided with a pull groove (810).

4. The secondary ejection mechanism for a plastic button injection mold according to claim 1, characterized in that: A triangular strip (811) is fixedly connected to the side of the connecting plate (804) away from the first spring (807), and a push plate (812) is fixedly connected to the inclined surface of the triangular strip (811).

5. The secondary ejection mechanism for a plastic button injection mold according to claim 1, characterized in that: A collection structure (9) is provided on one side of the base plate (1). The collection structure (9) includes an extension plate (91). One side of the extension plate (91) is fixedly connected to the base plate (1). A collection frame (92) is placed on the upper surface of the base plate (1). Two connecting rods (93) are fixedly connected to one side of the moving mold (2). An arc plate (94) is fixedly connected to the side of the two connecting rods (93) that are close to each other. The arc plate (94) is located above the collection frame (92).

6. The secondary ejection mechanism for a plastic button injection mold according to claim 5, characterized in that: The inner wall of the collection frame (92) is uniformly fixedly connected with a number of second springs (95), and the other end of the number of second springs (95) is fixedly connected with a support plate (96). The upper surface of the support plate (96) is fixedly connected with a pad (97).

7. The secondary ejection mechanism for a plastic button injection mold according to claim 6, characterized in that: The lower surface of the collection frame (92) abuts against the extension plate (91), and the pad (97) is a sponge pad.

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