Plastic part injection mold

Abstract

The utility model relates to the technical field of molds, and discloses a plastic part injection mold which comprises a bottom plate, the top of the bottom plate is fixedly connected with a U-shaped frame, the top of the U-shaped frame is provided with two hydraulic rods, the bottom ends of the hydraulic rods are fixedly connected with an upper mold, the top of the bottom plate is provided with a switching assembly, and the switching assembly comprises a concentric-square-shaped frame and two lower molds. The right side of the concentric-square-shaped frame is fixedly connected with an air cylinder, and supporting plates are fixedly connected to the four corners of the bottom of the concentric-square-shaped frame. By arranging the rotating assembly, in the moving process of the concentric-square-shaped frame, one end of the abutting rod can abut against the surface of the vertical plate firstly, so that the movable toothed plate moves, the deflection gear deflects under the action of the movable toothed plate, the supporting rod on the lower mold is subjected to the action of the deflection gear, the lower mold rotates by a half circle, and then the threaded rod is rotated; and the connecting cylinder drives the lifting plate to move in the vertical direction, so that the lifting plate pushes out formed materials, and the materials are taken down more conveniently.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a plastic injection mold. Background Technology

[0002] With the rapid development of society and the increase in engineering materials, many high-quality materials have emerged, such as rubber, glass and plastic. Plastic materials are widely used because of their unique toughness and wear resistance. In the process of plastic processing, injection molds are needed to shape and cast plastic parts.

[0003] Chinese patent CN113103533A discloses an injection mold for plastic parts. The control board controls the rotation of a cooling fan, which draws in external air and allows the air to pass through the heat dissipation pipe to carry away heat. The hot air is blown away from the device through the partition plate, thereby realizing the heat dissipation function of the device, accelerating the cooling of the plastic model, increasing the production speed, and improving the practicality of the device.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: After completing the injection molding process, the device is difficult to quickly unload the mold, requiring manual unloading by the worker. When the connection between the molded material and the injection mold is relatively firm, it may cause difficulties for the worker to unload the material. In addition, after removing the molded material, the lower mold needs to be reset before the next injection molding operation can be carried out, which affects the continuity of the device's operation and thus affects the device's working efficiency. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a plastic injection mold.

[0006] This utility model is achieved by the following technical solution: a plastic injection mold, including a base plate, a U-shaped frame fixedly connected to the top of the base plate, two hydraulic rods installed on the top of the U-shaped frame, an upper mold fixedly connected to the bottom end of the hydraulic rods, and a switching component installed on the top of the base plate.

[0007] The switching assembly includes a U-shaped frame and two lower molds. A cylinder is fixedly connected to the right side of the U-shaped frame, and support plates are fixedly connected to the four corners of the bottom of the U-shaped frame. Support rods are fixedly connected to the front and back of the lower molds. One end of the back support rod is rotatably connected to the back of the inner wall of the U-shaped frame. A lifting plate is installed inside the lower mold. A connecting cylinder is fixedly connected to the surface of the lifting plate. A threaded rod is threadedly connected inside the connecting cylinder. A rotating assembly is installed on the front of the U-shaped frame.

[0008] The rotating assembly includes a fixed block fixedly connected to the front of the U-shaped frame. Spring rods are fixedly connected at equal intervals to the front and back of the fixed block. A movable toothed plate is fixedly connected to one end of the spring rod. A deflection gear is meshed with the surface of the movable toothed plate. The inside of the deflection gear is sleeved on the outside of the front support rod. An abutment rod is fixedly connected to the surface of the movable toothed plate. Four vertical plates are fixedly connected to the top of the base plate.

[0009] As a further improvement to the above solution, a small bearing is installed on the surface of the threaded rod, and the outer side of the small bearing is installed on the surface of the lower mold to ensure the normal rotation of the threaded rod.

[0010] As a further improvement to the above solution, a straight groove is provided on the top of the base plate for the support plate to move, ensuring the normal movement of the support plate.

[0011] As a further improvement to the above solution, two fixing plates are sleeved on the outer side of the cylinder, and the bottom of the fixing plates is fixedly connected to the top of the base plate to ensure the normal operation of the cylinder.

[0012] As a further improvement to the above solution, a limiting strip is fixedly connected to the surface of the movable toothed plate, and a limiting groove is provided on the front of the U-shaped frame to allow the limiting strip to move, thus ensuring the normal movement of the movable toothed plate.

[0013] As a further improvement to the above solution, two limiting plates are fixedly connected to the top of the base plate, and the bottom of the limiting plates are fixedly connected to the top of the base plate to ensure the stability of the lower mold during the injection molding process.

[0014] As a further improvement to the above solution, the spring rod includes a sleeve, and a piston rod is slidably connected inside the sleeve. The surface of the piston rod and the inner wall of the sleeve are connected by a return spring to facilitate the resetting of the moving toothed plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. By setting a rotating component, during the movement of the return frame, one end of the abutment rod will first abut against the surface of the vertical plate, causing the moving toothed plate to move. The deflection gear will deflect under the action of the moving toothed plate. The support rod on the lower mold will be affected by the deflection gear, causing the lower mold to rotate half a turn. Then the threaded rod will rotate, causing the connecting cylinder to move with the lifting plate in the vertical direction, thereby allowing the lifting plate to push out the formed material, making it more convenient to remove the material.

[0017] 2. This utility model, by setting a switching component, activates a cylinder to move one of the lower molds to the bottom of the U-shaped frame, then fills the inside of the lower mold with material. Activating a hydraulic rod moves the upper mold into the lower mold, thereby extruding the material and forming it. Activating the hydraulic rod again resets the upper mold, and then activating the cylinder moves the return frame to switch to the other lower mold. The formed material is then removed, and injection molding is performed on the other lower mold simultaneously. By controlling the switching of the two lower molds with a cylinder, material handling and injection molding can be performed simultaneously, improving the continuity and working efficiency of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the return frame, lower mold and cylinder of this utility model;

[0020] Figure 3 This is a structural schematic diagram of the lifting plate, connecting cylinder, and threaded rod of this utility model.

[0021] Explanation of key symbols:

[0022] 1. Base plate; 2. U-shaped frame; 3. Hydraulic rod; 4. Upper mold; 5. Return frame; 6. Lower mold; 7. Cylinder; 8. Support plate; 9. Vertical plate; 10. Lifting plate; 11. Connecting cylinder; 12. Threaded rod; 13. Fixing block; 14. Spring rod; 15. Moving toothed plate; 16. Deflecting gear; 17. Abutment rod. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0024] Example:

[0025] Please combine Figure 1-3 This embodiment of a plastic injection mold includes a base plate 1, a U-shaped frame 2 fixedly connected to the top of the base plate 1, two hydraulic rods 3 installed on the top of the U-shaped frame 2, an upper mold 4 fixedly connected to the bottom end of the hydraulic rods 3, and a switching assembly installed on the top of the base plate 1.

[0026] The switching assembly is used to change the position of the two lower molds 6. The switching assembly includes a return frame 5 and two lower molds 6. Two limiting plates are fixedly connected to the top of the base plate 1, and the bottom of the limiting plates is fixedly connected to the top of the base plate 1 to ensure the stability of the lower molds 6 during the injection molding process. A cylinder 7 is fixedly connected to the right side of the return frame 5. Two fixing plates are sleeved on the outside of the cylinder 7, and the bottom of the fixing plates is fixedly connected to the top of the base plate 1 to ensure the normal operation of the cylinder 7. Support plates 8 are fixedly connected to the four corners of the bottom of the return frame 5. The top of the base plate 1 has an opening. A linear groove for the support plate 8 to move ensures the normal movement of the support plate 8. Support rods are fixedly connected to the front and back of the lower mold 6. One end of the back support rod is rotatably connected to the back of the inner wall of the return frame 5. A lifting plate 10 is installed inside the lower mold 6. A connecting cylinder 11 is fixedly connected to the surface of the lifting plate 10. A threaded rod 12 is threadedly connected inside the connecting cylinder 11. A small bearing is installed on the surface of the threaded rod 12. The outer side of the small bearing is installed on the surface of the lower mold 6 to ensure the normal rotation of the threaded rod 12. A rotating component is installed on the front of the return frame 5.

[0027] The rotating assembly is used to rotate the lower mold 6. The rotating assembly includes a fixed block 13 fixedly connected to the front of the return frame 5. Spring rods 14 are fixedly connected at equal intervals on the front and back of the fixed block 13. A movable toothed plate 15 is fixedly connected to one end of the spring rod 14. A limit strip is fixedly connected to the surface of the movable toothed plate 15. A limit groove for the movement of the limit strip is opened on the front of the return frame 5 to ensure the normal movement of the movable toothed plate 15. The spring rod 14 includes a sleeve. A piston rod is slidably connected inside the sleeve. The surface of the piston rod and the inner wall of the sleeve are connected by a return spring to facilitate the reset of the movable toothed plate 15. A deflection gear 16 is meshed with the surface of the movable toothed plate 15. The inside of the deflection gear 16 is sleeved on the outside of the front support rod. An abutment rod 17 is fixedly connected to the surface of the movable toothed plate 15. Four vertical plates 9 are fixedly connected to the top of the base plate 1.

[0028] The implementation principle of a plastic injection mold in this embodiment is as follows: The cylinder 7 is activated, causing one of the lower molds 6 to move below the U-shaped frame 2. Material is then filled into the lower mold 6. The hydraulic rod 3 is activated, causing the upper mold 4 to move into the lower mold 6, thereby extruding the material and forming it. The hydraulic rod 3 is then activated again, causing the upper mold 4 to reset. The cylinder 7 is then activated, causing the return frame 5 to move, switching to the other lower mold 6. The formed material is then removed, and injection molding is performed on the other lower mold 6 simultaneously. By controlling the switching of the two lower molds 6 through the cylinder 7, material removal and injection molding are performed simultaneously, improving the continuity and efficiency of the device.

[0029] During the movement of the return frame 5, one end of the abutment rod 17 will first abut against the surface of the vertical plate 9, causing the moving toothed plate 15 to move. The deflection gear 16 will deflect under the action of the moving toothed plate 15. The support rod on the lower mold 6 will be affected by the deflection gear 16, causing the lower mold 6 to rotate half a turn. Then the threaded rod 12 will rotate, causing the connecting cylinder 11 to move the lifting plate 10 in the vertical direction, thereby allowing the lifting plate 10 to push out the formed material, making it easier to remove the material.

[0030] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A plastic injection mold, characterized in that, Includes a base plate (1), a U-shaped frame (2) is fixedly connected to the top of the base plate (1), two hydraulic rods (3) are installed on the top of the U-shaped frame (2), an upper mold (4) is fixedly connected to the bottom end of the hydraulic rods (3), and a switching assembly is installed on the top of the base plate (1); The switching assembly includes a return frame (5) and two lower molds (6). A cylinder (7) is fixedly connected to the right side of the return frame (5). Support plates (8) are fixedly connected to the four corners of the bottom of the return frame (5). Support rods are fixedly connected to the front and back of the lower molds (6). One end of the back support rod is rotatably connected to the back of the inner wall of the return frame (5). A lifting plate (10) is installed inside the lower molds (6). A connecting cylinder (11) is fixedly connected to the surface of the lifting plate (10). A threaded rod (12) is threadedly connected inside the connecting cylinder (11). A rotating assembly is installed on the front of the return frame (5). The rotating assembly includes a fixed block (13) fixedly connected to the front of the U-shaped frame (5). Spring rods (14) are fixedly connected at equal intervals on the front and back of the fixed block (13). A movable toothed plate (15) is fixedly connected to one end of the spring rod (14). A deflection gear (16) is meshed with the surface of the movable toothed plate (15). The inside of the deflection gear (16) is sleeved on the outside of the front support rod. An abutment rod (17) is fixedly connected to the surface of the movable toothed plate (15). Four vertical plates (9) are fixedly connected to the top of the base plate (1).

2. The injection mold for a plastic part as described in claim 1, characterized in that, The threaded rod (12) is fitted with a small bearing, and the outer side of the small bearing is fitted onto the surface of the lower mold (6).

3. The injection mold for a plastic part as described in claim 1, characterized in that, The top of the base plate (1) is provided with a straight groove for the support plate (8) to move.

4. A plastic injection mold as described in claim 1, characterized in that, Two fixing plates are sleeved on the outside of the cylinder (7), and the bottom of the fixing plates is fixedly connected to the top of the base plate (1).

5. A plastic injection mold as described in claim 1, characterized in that, The surface of the movable toothed plate (15) is fixedly connected to a limiting strip, and the front of the U-shaped frame (5) is provided with a limiting groove for the limiting strip to move.

6. A plastic injection mold as described in claim 1, characterized in that, The top of the base plate (1) is fixedly connected to two limiting plates, and the bottom of the limiting plates is fixedly connected to the top of the base plate (1).

7. A plastic injection mold as described in claim 1, characterized in that, The spring rod (14) includes a sleeve, and a piston rod is slidably connected inside the sleeve. The surface of the piston rod and the inner wall of the sleeve are connected by a return spring.

Images