Automatic ejection device for injection-moulded plastic shells

Abstract

The utility model relates to a plastic shell's injection mould automatic ejection device, including first injection mould, be equipped with mounting groove on first injection mould, be equipped with mould groove on first injection mould, the mould groove is used for the plastic shell joint, first injection mould swing joint has a plurality of first ejector rod, first injection mould's middle swing joint has second ejector rod, first injection mould is fixedly connected with the air cylinder on the inboard wall close to the mounting groove, the output of air cylinder is fixedly connected with support frame. The utility model discloses first injection mould, first ejector rod, second ejector rod, air cylinder, support frame, limiting rod and sliding slot are set up, and the limiting rod is inserted in the middle of sliding slot, thereby limiting the lateral displacement of air cylinder, improves the stability of air cylinder movement support, and the first ejector rod and second ejector rod can be driven to move synchronously with support frame through starting air cylinder, improves the uniformity and stability of plastic shell surface support, thereby improves the efficiency and quality of plastic shell ejection.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to an automatic ejection device for injection molding of plastic housings. Background Technology

[0002] Automatic ejection devices for plastic housings are core components of injection molding equipment. They are mechanical devices that automatically remove the molded housing from the mold cavity after injection molding, avoiding the problems of low efficiency and easy damage to products caused by manual removal. They are key equipment for achieving mass production and high efficiency of plastic housings.

[0003] Existing automatic ejection devices for plastic housing injection molding typically include ejection drive, precision guide, and ejector rod mechanisms. The drive mechanism can use a cylinder as a power source to provide power for the ejection action. The precision guide mechanism is symmetrically arranged on both sides of the drive mechanism, with the guide rod slidingly engaged with the ejector plate mounting seat. Combined with the gap compensation effect of the elastic compensation piece inside the guide sleeve, it ensures that the ejector plate moves without deviation. In the ejector rod mechanism, the ejector rod body is connected to the positioning sleeve on the ejector plate via threads and fixed by a locking nut. It moves synchronously with the ejector plate, directly contacting and pushing the plastic housing. In existing automatic ejection devices for plastic housing injection molding, a single ejector rod supports the plastic housing, and the depth distribution of the mold grooves is inconsistent. When the ejector rod supports the plastic housing, it may cause uneven stress on the plastic housing, leading to deformation and affecting the efficiency and quality of plastic ejection. Utility Model Content

[0004] The technical problem to be solved by this utility model is that when the existing automatic ejection device for plastic shells is in use, the ejector rod may cause uneven stress on the plastic shell, which in turn leads to deformation of the plastic shell, thereby affecting the ejection efficiency and quality of the plastic shell.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An automatic ejection device for injection molding of a plastic shell includes a first injection mold, an installation groove on the first injection mold, a mold groove on the first injection mold for the plastic shell to be snapped into, several first ejector rods movably connected to the first injection mold, a second ejector rod movably connected to the middle of the first injection mold, a cylinder fixedly connected to the inner wall of the first injection mold near the installation groove, a support frame fixedly connected to the output end of the cylinder, one end of each of the first ejector rods fixedly connected to the support frame, one end of each of the second ejector rods fixedly connected to the middle of the support frame, the cylinder driving the support frame, the first ejector rods, and the second ejector rods to move horizontally, several limiting rods fixedly connected to the inner wall of the first injection mold near the cylinder, several sliding grooves on the surface of the support frame, and the limiting rods correspondingly inserted into the middle of the sliding grooves.

[0006] The beneficial effects of this utility model are as follows: by providing a first injection mold, a first ejector rod, a second ejector rod, a cylinder, a support frame, a limiting rod, and a slide groove, the lateral displacement of the cylinder is limited by the limiting rod being inserted into the middle of the slide groove, thereby improving the stability of the cylinder's moving support. By activating the cylinder, the first and second ejector rods can be driven to move synchronously with the support frame, improving the uniformity and stability of the support on the surface of the plastic shell, thereby improving the efficiency and quality of the plastic shell ejection.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, springs are wound around the limit rods, with one end of the springs fixedly connected to the first injection mold and the other end of the springs fixedly connected to limit rings, which improves the support force at the end of the cylinder.

[0009] Furthermore, the first injection mold has several first insertion holes for the first ejector pin to slide through, and a second insertion hole is provided in the middle of the first injection mold for the second ejector pin to slide through, thereby improving the stability of the sliding of the first ejector pin and the second ejector pin.

[0010] Furthermore, the other end of each first push rod is fixedly connected to a first support block, and the surface of the first injection mold near the first insertion hole is provided with a first slot. The first slot is used for the first insertion hole to engage, and the first insertion hole contacts the plastic particles, thereby improving the stability of the first push rod supporting the plastic shell.

[0011] Furthermore, a second support block is fixedly connected to the other end of the second push rod, and a second slot is provided on the surface of the first injection mold near the second insertion hole. The second slot is used for the second insertion hole to engage, and the second insertion hole contacts the plastic particles, which improves the stability of the second push rod supporting the plastic shell.

[0012] Furthermore, a water channel is provided in the middle of the first injection mold, and the water channel is S-shaped to allow cooling water to flow.

[0013] Furthermore, the first injection mold is equipped with an inlet and an outlet, one end of the water flow channel is connected to the inlet, and the other end of the water flow channel is connected to the outlet.

[0014] Furthermore, the upper fixed connection of the first injection mold has two mounting feet, each with a threaded groove for bolt connection.

[0015] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting a spring and a limiting ring, the spring stores energy through compression deformation, and the limiting ring is fixedly connected to the spring. The limiting ring is used to transmit the elastic force to the cylinder, thereby enhancing the support force at the end of the cylinder and improving the stability and convenience of the cylinder sliding along the limiting rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 4 This is a schematic diagram of the support frame structure of this utility model; Figure 5 This is a schematic diagram of the planar structure of the injection mold of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. First injection mold; 2. Mounting groove; 3. Mold groove; 4. First ejector pin; 5. Second ejector pin; 6. Mounting foot; 7. Inlet; 8. Cylinder; 9. Support frame; 10. Outlet; 11. First support block; 12. Second support block; 13. Flow channel; 14. Limiting rod; 15. Spring; 16. Slide groove; 17. First insertion hole; 18. First slot; 19. Second insertion hole; 20. Second slot; 21. Limiting ring. Detailed Implementation

[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0019] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0020] like Figure 1-5As shown, the automatic ejection device for the plastic shell injection molding includes a first injection mold 1. The first injection mold 1 has an installation groove 2 that extends through it for equipment installation and increases the contact area between the first injection mold 1 and the air, improving heat dissipation efficiency. The first injection mold 1 also has a mold groove 3, which, when combined with a second injection mold, can seal the mold groove 3. The second injection mold has an injection port for molten injection material to flow into the mold groove 3. The molten injection material cools and solidifies in the mold groove 3 to form a plastic shell. Several first ejector rods 4 are movably connected to the first injection mold 1, and a second ejector rod 5 is movably connected to the center of the first injection mold 1. The first ejector rods 4 and 5 are evenly distributed. A cylinder 8 is fixedly connected to the inner wall of the first injection mold 1 near the installation groove 2. A support frame 9 is fixedly connected to the output end of the cylinder 8. One end of each first ejector rod 4 is fixedly connected to the support frame 9 by bolts. One end of each second ejector rod 5... The first ejector rod 4 and the second ejector rod 5 are fixedly connected to the support frame 9 by bolts. The other ends of the first ejector rod 4 and the second ejector rod 5 are used to support the plastic shell. The cylinder 8 is used to drive the support frame 9, the first ejector rod 4 and the second ejector rod 5 to move horizontally. Several limiting rods 14 are fixedly connected to the inner wall of the first injection mold 1 near the cylinder 8. Several sliding grooves 16 are opened on the surface of the support frame 9. The limiting rods 14 are respectively inserted into the middle of the sliding grooves 16. By setting the first injection mold 1, the first ejector rod 4, the second ejector rod 5, the cylinder 8, the support frame 9, the limiting rods 14 and the sliding grooves 16, the lateral displacement of the cylinder 8 is limited, which improves the stability of the cylinder 8's moving support. When the first injection mold 1 and the second injection mold are separated, the cylinder 8 can be activated to drive the first ejector rod 4 and the second ejector rod 5 to move synchronously with the support frame 9, which improves the uniformity and stability of the support on the surface of the plastic shell, thereby improving the efficiency and quality of the plastic shell ejection.

[0021] Springs 15 are wound around the limiting rods 14. One end of the springs 15 is fixedly connected to the first injection mold 1 by welding. The other end of the springs 15 is fixedly connected to the limiting rings 21 by welding. The limiting rings 21 are circular and supported on the side wall of the cylinder 8. The springs 15 store energy through compression deformation. The limiting rings 21 are fixedly connected to the springs 15. The limiting rings 21 are used to transmit elastic force to the cylinder 8, thereby enhancing the support force at the end of the cylinder 8 and improving the stability and convenience of the cylinder 8 sliding along the limiting rods 14.

[0022] The first injection mold 1 has several first insertion holes 17 for sliding of the first ejector pin 4, improving the stability of the horizontal movement of the first ejector pin 4. A second insertion hole 19 is provided in the middle of the first injection mold 1, for sliding of the second ejector pin 5, improving the stability of the horizontal movement of the second ejector pin 5 and the sliding stability of both the first ejector pin 4 and the second ejector pin 5. A first support block 11 is fixedly connected to the other end of each first ejector pin 4. The first support block 11 is conical and fixedly connected to the first ejector pin 4 to form an integral structure. First slots 18 are provided on the surface of the first injection mold 1 near the first insertion holes 17, for engaging with the first insertion holes 17. The first insertion holes 17 contact the plastic particles, improving... The first push rod 4 supports the stability of the plastic shell. The other end of the second push rod 5 is fixedly connected to the second support block 12. The second support block 12 is conical and fixedly connected to the second push rod 5 to form an integral structure. The surface of the first injection mold 1 near the second insertion hole 19 is provided with a second slot 20. The second slot 20 is used for the second insertion hole 19 to engage. The second insertion hole 19 is in contact with the plastic particles, which improves the stability of the second push rod 5 supporting the plastic shell. The first support block 11 and the second support block 12 respectively increase the support area of ​​the first push rod 4 and the second push rod 5 with the plastic shell. Through the cooperation of the first support block 11, the first slot 18, the second support block 12 and the second slot 20, the sealing performance of the first insertion hole 17 and the second insertion hole 19 is improved.

[0023] The first injection mold 1 has a water channel 13 in the middle, which is S-shaped to allow cooling water to flow. The first injection mold 1 is equipped with a water inlet 7 and a water outlet 10. One end of the water channel 13 is connected to the water inlet 7, and the other end of the water channel 13 is connected to the water outlet 10. The first injection mold 1 has two mounting feet 6 fixedly connected to it. Each mounting foot 6 has a threaded groove for bolt connection. When the cooling water flows into the water channel 13, it is convenient to cool the first injection mold 1, the first ejector rod 4, and the second ejector rod 5.

[0024] Working principle: When using the automatic ejection device for injection molding with a plastic shell, the operator first connects an external power supply. After the plastic shell is injected and cooled, the piston rod in the cylinder 8 moves, which drives the support frame 9 to move horizontally. When the support frame 9 moves, it drives the first ejector rod 4 and the second ejector rod 5 to move synchronously, so that the first support block 11 and the second support block 12 are simultaneously supported on the side wall of the plastic shell, thereby improving the uniformity and stability of the force distribution on the side wall of the plastic shell. The limiting rod 14 is inserted in the middle of the slide groove 16. By limiting the lateral displacement of the end of the support frame 9, the stability of the movement of the support frame 9 is improved. As the cylinder 8 continues to drive, the plastic shell that is stuck in the mold groove 3 is pushed out of the mold groove 3 and separated from the first support block 11 and the second support block 12 under the action of gravity.

[0025] Secondly, the spring 15 stores energy through compression deformation, and the limiting ring 21 is fixedly connected to the spring 15. The limiting ring 21 is used to transmit the elastic force to the cylinder 8, thereby enhancing the support force at the end of the cylinder 8 and improving the stability and convenience of the cylinder 8 sliding along the limiting rod 14.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be understood that this embodiment is only for illustrating this utility model and is not intended to limit the scope of this utility model. Furthermore, it should be understood that after reading the teachings of this utility model, those skilled in the art can make various alterations or modifications to this utility model, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. An automatic ejection device for injection molding of plastic housings, characterized in that: The first injection mold (1) includes an installation groove (2) and a mold groove (3) for attaching a plastic shell. Several first ejector rods (4) are movably connected to the first injection mold (1). A second ejector rod (5) is movably connected to the middle of the first injection mold (1). A cylinder (8) is fixedly connected to the inner wall of the first injection mold (1) near the installation groove (2). A support frame is fixedly connected to the output end of the cylinder (8). (9) One end of the first push rod (4) is fixedly connected to the support frame (9), and one end of the second push rod (5) is fixedly connected to the middle of the support frame (9). The cylinder (8) is used to drive the support frame (9), the first push rod (4) and the second push rod (5) to move horizontally. Several limit rods (14) are fixedly connected to the inner wall of the first injection mold (1) near the cylinder (8). Several sliding grooves (16) are opened on the surface of the support frame (9), and the limit rods (14) are respectively inserted into the middle of the corresponding sliding grooves (16).

2. The automatic ejection device for injection molding of plastic housing according to claim 1, characterized in that, Each of the limiting rods (14) is wrapped with a spring (15). One end of the spring (15) is fixedly connected to the first injection mold (1), and the other end of the spring (15) is fixedly connected to a limiting ring (21).

3. The automatic ejection device for injection molding of plastic housing according to claim 1, characterized in that, The first injection mold (1) has several first insertion holes (17) for the first ejector rod (4) to slide. The first injection mold (1) has a second insertion hole (19) in the middle for the second ejector rod (5) to slide.

4. The automatic ejection device for injection molding of plastic housing according to claim 3, characterized in that, The other end of the first push rod (4) is fixedly connected to the first support block (11), and the surface of the first injection mold (1) near the first insertion hole (17) is provided with a first slot (18), which is used for the first insertion hole (17) to engage.

5. The automatic ejection device for injection molding of plastic housing according to claim 3, characterized in that, The other end of the second push rod (5) is fixedly connected to the second support block (12). The surface of the first injection mold (1) near the second insertion hole (19) is provided with a second slot (20), which is used for the second insertion hole (19) to engage.

6. The automatic ejection device for injection molding of plastic housing according to claim 3, characterized in that, The first injection mold (1) has a water channel (13) in the middle, and the water channel (13) is S-shaped to allow cooling water to flow.

7. The automatic ejection device for injection molding of plastic housing according to claim 6, characterized in that, The first injection mold (1) is equipped with an inlet (7) and an outlet (10). One end of the water channel (13) is connected to the inlet (7), and the other end of the water channel (13) is connected to the outlet (10).

8. The automatic ejection device for injection molding of plastic housing according to claim 7, characterized in that, The upper fixed connection of the first injection mold (1) has two mounting feet (6), and each mounting foot (6) has a threaded groove for bolt connection.

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