Plastic injection molding machine convenient to demould

Abstract

The utility model relates to the technical field of injection molding machines, and discloses a plastic injection molding machine convenient to demould, which comprises a working table, and an upper mould is mounted at the top of the working table. According to the plastic injection molding machine convenient to demould, a worker presses the top of an L-shaped rod downwards to enable the bottom of the L-shaped rod to rotate downwards on the surface of a rotating shaft, so that a first spring is pulled by the L-shaped rod to store force, then a second lower mould is pushed to enable a sliding block to slide to a designated position on the surface of a sliding rod, and then the L-shaped rod is loosened to release force generated by the first spring; a first spring rebounds to pull an L-shaped rod to rotate downwards on the surface of a rotating shaft, the bottom of the L-shaped rod is inserted into a groove, the position of a second lower mold is fixed, the second lower mold and the first lower mold are in butt joint, a complete lower mold is obtained, and the first lower mold and the second lower mold can be separated after injection molding of the upper mold and the lower mold succeeds; and the molded injection molding part is exposed, so that a worker can conveniently demold the mold.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a plastic injection molding machine convenient for demolding. Background Technique

[0002] A plastic injection molding machine is also called a plastic injection molding machine or a plastic injection machine. It is the main molding equipment for making various shapes of plastic products by using a plastic molding die for thermoplastic or thermosetting materials. It is divided into vertical, horizontal, and all-electric types. The plastic injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.

[0003] The Chinese patent discloses an injection molding machine for plastic processing (authorization publication number CN213919264U). This patented technology drives the telescopic rod to stretch through a telescopic power machine, so that when the telescopic rod extends, it drives the compression plate to move downward and cooperate with the mold to mutually extrude and inject the melt for molding. The operation process is simple, and the output efficiency of the finished product is improved.

[0004] In view of the above and existing related technologies, the inventor believes that there are often the following defects: in the actual production process, after the plastic part is injection-molded by the existing injection molding machine, when the upper and lower molds are separated, the molded part often adheres to one of the molds. Although this design intention aims to simplify the operation process of the staff to take out the molded part from the mold, it is easy to cause damage to the molded part during the taking-out process. This phenomenon not only increases the demolding difficulty of the molded part, but also has an adverse impact on the overall production efficiency of the injection molding machine. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is: there is a disadvantage that the molding die is not convenient for demolding in the prior art. For this reason, we propose a plastic injection molding machine convenient for demolding.

[0006] In order to achieve the above purpose, the present application adopts the following technical solution: a plastic injection molding machine convenient for demolding, including a workbench, an upper mold is installed on the top of the workbench, an injection device is installed on the top of the upper mold, a first lower mold is fixedly connected to the top of the workbench, two grooves are opened on the top of the workbench, long grooves are opened on both sides of the top of the workbench, a sliding rod is fixedly connected to the inner wall of the long groove, a slider is slidably connected to the surface of the sliding rod, a second lower mold is fixedly connected to the top of the slider, a rotating shaft is fixedly connected to one side of the second lower mold, an L-shaped rod is rotatably connected to the surface of the rotating shaft, a first spring is fixedly connected to the top of the L-shaped rod, an inclined block is fixedly connected to the top of the first spring, and one side of the inclined block is fixedly connected to the second lower mold.

[0007] Preferably, a nut block is fixedly connected to one side of the L-shaped rod, and a threaded rod is threadedly connected to the inside of the nut block.

[0008] Preferably, a sliding groove is formed on the surface of the L-shaped rod, and an extension rod is slidably connected to the inner wall of the sliding groove. One end of the extension rod is fixedly connected to the inclined block.

[0009] Preferably, the extension rod is disposed inside the inner wall of the first spring.

[0010] Preferably, a circular groove is formed inside the slider, and a plurality of semi-circular rollers are fixedly connected to the inner wall of the circular groove. The surface of the semi-circular rollers is slidably connected to the surface of the sliding rod.

[0011] Preferably, a second spring is fixedly connected to one side of the slider, and one end of the second spring is fixedly connected to one side of the inner wall of the long groove.

[0012] Preferably, rounded corners are formed on both sides of the L-shaped rod.

[0013] The technical effects and advantages of the present utility model:

[0014] In the present utility model, by the staff pressing down the top of the L-shaped rod, the bottom of the L-shaped rod rotates downward on the surface of the rotating shaft, so that the first spring is pulled by the L-shaped rod to store energy. Then, the second lower mold is pushed to make the slider slide on the surface of the sliding rod to a specified position. Then, the L-shaped rod is released to release the force generated by the first spring, so that the first spring rebounds to pull the L-shaped rod to rotate downward on the surface of the rotating shaft, so that the bottom of the L-shaped rod is inserted into the groove to fix the position of the second lower mold, so that the second lower mold is docked with the first lower mold to obtain a complete lower mold. After the upper and lower molds are successfully injection-molded, the first lower mold and the second lower mold can be separated, and the molded injection-molded part is exposed, so as to facilitate the staff to demold the mold. Description of the Drawings

[0015] Figure 1 is the front view structural schematic diagram of the present utility model;

[0016] Figure 2 is the cross-sectional view of the moving structure of the present utility model;

[0017] Figure 3 is the cross-sectional view of the sliding structure of the present utility model;

[0018] Figure 4 is the schematic diagram of the limiting structure of the present utility model.

[0019] Legend: 1. Workbench; 2. Upper mold; 3. Injection molding device; 4. First lower mold; 5. Groove; 6. Long groove; 7. Slide bar; 8. Slide block; 9. Second lower mold; 10. Rotating shaft; 11. L-shaped rod; 12. First spring; 13. Inclined block; 14. Nut block; 15. Threaded rod; 16. Chute; 17. Extension rod; 18. Circular groove; 19. Semi-circular roller; 20. Second spring; 21. Rounded corner. Detailed implementation

[0020] Now, in combination with the attached drawings and preferred embodiments, the present utility model will be further described in detail. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0021] Refer to Figure 1 - Figure 4 As shown, the present utility model provides a technical solution: a plastic injection molding machine facilitating demolding, including a workbench 1. An upper mold 2 is installed on the top of the workbench 1, and an injection molding device 3 is installed on the top of the upper mold 2. A first lower mold 4 is fixedly connected to the top of the workbench 1. Two grooves 5 are opened on the top of the workbench 1. Long grooves 6 are opened on both sides of the top of the workbench 1. A slide bar 7 is fixedly connected to the inner wall of the long groove 6. A slide block 8 is slidably connected to the surface of the slide bar 7. A second lower mold 9 is fixedly connected to the top of the slide block 8. A rotating shaft 10 is fixedly connected to one side of the second lower mold 9. An L-shaped rod 11 is rotatably connected to the surface of the rotating shaft 10. A first spring 12 is fixedly connected to the top of the L-shaped rod 11. The top of the first spring 12 is fixedly connected to an inclined block 13. One side of the inclined block 13 is fixedly connected to the second lower mold 9. By the staff pressing down the top of the L-shaped rod 11, the bottom of the L-shaped rod 11 rotates downward on the surface of the rotating shaft 10, so that the first spring 12 is pulled by the L-shaped rod 11 to store energy. Then, the second lower mold 9 is pushed to make the slide block 8 slide on the surface of the slide bar 7 to a specified position. Then, the L-shaped rod 11 is released to release the force generated by the first spring 12, so that the first spring 12 rebounds to pull the L-shaped rod 11 to rotate downward on the surface of the rotating shaft 10, so that the bottom of the L-shaped rod 11 is inserted into the groove 5 to fix the position of the second lower mold 9, so that the second lower mold 9 is docked with the first lower mold 4 to obtain a complete lower mold, so that after the upper and lower molds are injection molded successfully, the first lower mold 4 and the second lower mold 9 can be separated, exposing the molded injection molded part, thus facilitating the staff to demold the mold.

[0022] Refer to Figure 4As shown in the figure, in this embodiment: A nut block 14 is fixedly connected to one side of the L-shaped rod 11. A threaded rod 15 is threadedly connected inside the nut block 14. After the staff inserts the L-shaped rod 11 into the groove 5, through the threaded connection between the nut block 14 and the threaded rod 15, the staff can turn the threaded rod 15 to abut against one side of the extension rod 17, thereby fixing the position of the L-shaped rod 11 to prevent the first spring 12 from being vibrated and causing the L-shaped rod 11 to disengage from the groove 5.

[0023] Referring to Figure 4 As shown in the figure, in this embodiment: A chute 16 is formed on the surface of the L-shaped rod 11. An extension rod 17 is slidably connected to the inner wall of the chute 16. One end of the extension rod 17 is fixedly connected to the inclined block 13. When the staff pulls the L-shaped rod 11 to move, through the sliding connection between the extension rod 17 and the chute 16, the movement track of the L-shaped rod 11 is restricted, the stress area of the L-shaped rod 11 is increased, and the L-shaped rod 11 is strengthened to prevent the L-shaped rod 11 from breaking after long-term use.

[0024] Referring to Figure 4 As shown in the figure, in this embodiment: The extension rod 17 is placed inside the first spring 12. Through the sliding connection between the extension rod 17 and the first spring 12, when the first spring 12 operates, it can move along the outside of the extension rod 17 to prevent the first spring 12 from curling and winding with each other during operation, which affects the normal operation of the component.

[0025] Referring to Figure 3 As shown in the figure, in this embodiment: A circular groove 18 is formed inside the slider 8. A plurality of semi-circular rollers 19 are fixedly connected to the inner wall of the circular groove 18. The surface of the semi-circular rollers 19 is slidably connected to the surface of the sliding rod 7. When the slider 8 slides on the surface of the sliding rod 7, through the contact between the semi-circular rollers 19 arranged inside the circular groove 18 and the surface of the sliding rod 7, the contact area of the slider 8 sliding on the surface of the sliding rod 7 is reduced, the frictional resistance generated when the slider 8 moves on the surface of the sliding rod 7 is reduced, the smoothness of the movement of the slider 8 and the sliding rod 7 is improved, and it is more convenient for the user to move and adjust the position of the second lower mold 9.

[0026] Referring to Figure 2 And Figure 3 As shown in the figure, in this embodiment: A second spring 20 is fixedly connected to one side of the slider 8. One end of the second spring 20 is fixedly connected to one side of the inner wall of the long groove 6. When the slider 8 moves to one side, the slider 8 pulls the second spring 20 to store energy. When the staff releases the restriction on the position of the second lower mold 9, the slider 8 is pulled back by the second spring 20 to reset the position of the slider 8 and the second lower mold 9, so that after the staff adjusts the position of the second lower mold 9, the second lower mold 9 and the first lower mold 4 can be quickly combined.

[0027] Referring to Figure 4As shown, in this embodiment: rounded corners 21 are provided on both sides of the L-shaped rod 11. The rounded corners 21 provided at the contact point between the L-shaped rod 11 and the groove 5 make the bottom of the L-shaped rod 11 rounded and smooth. When the L-shaped rod 11 contacts the groove 5, the L-shaped rod 11 can slide into the inner wall of the groove 5 more easily.

[0028] Working principle: The staff presses down the top of the L-shaped rod 11 so that the bottom of the L-shaped rod 11 rotates downward on the surface of the rotating shaft 10, so that the first spring 12 is pulled by the L-shaped rod 11 to store force, and then pushes the second lower mold 9 to make the slider 8 slide to the specified position on the surface of the slide rod 7, and then releases the force generated by the first spring 12, so that the first spring 12 rebounds and pulls the L-shaped rod 11 to rotate downward on the surface of the rotating shaft 10, so that the bottom of the L-shaped rod 11 is inserted into the groove 5, fixes the position of the second lower mold 9, and makes the second lower mold 9 dock with the first lower mold 4 to obtain a complete lower mold, so that the upper and lower molds are injection molded. After the success, the first lower mold 4 and the second lower mold 9 can be separated, exposing the molded injection molded part, so that the staff can demould the mold. After the staff inserts the L-shaped rod 11 into the groove 5, the nut block 14 is threadedly connected with the threaded rod 15, so that the staff can twist the threaded rod 15 to abut against one side of the extension rod 17, thereby fixing the position of the L-shaped rod 11 to prevent the first spring 12 from being vibrated and causing the L-shaped rod 11 to be separated from the groove 5. When the staff pulls the L-shaped rod 11 to move, the sliding connection between the extension rod 17 and the slide groove 16 is used to limit the movement trajectory of the L-shaped rod 11, and the L-shaped rod 1 The force-bearing area is increased, and the L-shaped rod 11 is reinforced to prevent the L-shaped rod 11 from breaking after long-term use. The extension rod 17 is connected to the first spring 12 through sliding. When the first spring 12 is in operation, it can be attached to the outer side of the extension rod 17 for movement to prevent the first spring 12 from curling with each other during operation to cause entanglement and affect the normal operation of the component. When the slider 8 slides on the surface of the slide bar 7, the semi-circular roller 19 arranged inside the circular groove 18 contacts the surface of the slide bar 7, thereby reducing the contact area of ​​the slider 8 sliding on the surface of the slide bar 7, reducing the friction resistance generated by the slider 8 moving on the surface of the slide bar 7, improving the smoothness of the movement of the slider 8 and the slide bar 7, and making it more convenient. The user moves and adjusts the position of the second lower mold 9. When the slider 8 moves to one side, the slider 8 pulls the second spring 20 to store force. When the staff releases the restriction on the position of the second lower mold 9, the slider 8 is pulled back by the second spring 20 to reset the positions of the slider 8 and the second lower mold 9, so that the staff can quickly merge the second lower mold 9 with the first lower mold 4 after adjusting the position of the second lower mold 9. The fillet 21 provided at the contact point between the L-shaped rod 11 and the groove 5 makes the bottom of the L-shaped rod 11 rounded and smooth. When the L-shaped rod 11 contacts the groove 5, the L-shaped rod 11 can slide more easily into the inner wall of the groove 5.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A plastic injection molding machine for easy demoulding, comprising a workbench (1), characterized in that: An upper mold (2) is installed on the top of the workbench (1), an injection molding device (3) is installed on the top of the upper mold (2), a first lower mold (4) is fixedly connected to the top of the workbench (1), two grooves (5) are provided on the top of the workbench (1), long grooves (6) are provided on both sides of the top of the workbench (1), a sliding rod (7) is fixedly connected to the inner wall of the long groove (6), a sliding block (8) is slidably connected to the surface of the sliding rod (7), a second lower mold (9) is fixedly connected to the top of the sliding block (8), a rotating shaft (10) is fixedly connected to one side of the second lower mold (9), an L-shaped rod (11) is rotatably connected to the surface of the rotating shaft (10), a first spring (12) is fixedly connected to the top of the L-shaped rod (11), an inclined block (13) is fixedly connected to the top of the first spring (12), and one side of the inclined block (13) is fixedly connected to the second lower mold (9).

2. A plastic injection molding machine for easy demoulding according to claim 1, characterized in that: A nut block (14) is fixedly connected to one side of the L-shaped rod (11), and a threaded rod (15) is internally threadedly connected to the nut block (14).

3. A plastic injection molding machine for easy demoulding according to claim 1, characterized in that: A sliding groove (16) is provided on the surface of the L-shaped rod (11), an extension rod (17) is slidably connected to the inner wall of the sliding groove (16), and one end of the extension rod (17) is fixedly connected to the inclined block (13).

4. A plastic injection molding machine for easy demoulding according to claim 3, characterized in that: The extension rod (17) is placed on the inner wall of the first spring (12).

5. The plastic injection molding machine for easy demoulding according to claim 1, characterized in that: A circular groove (18) is provided inside the sliding block (8), and a plurality of semicircular rollers (19) are fixedly connected to the inner wall of the circular groove (18), and the surface of the semicircular rollers (19) is slidably connected to the surface of the sliding rod (7).

6. A plastic injection molding machine for easy demoulding according to claim 1, characterized in that: A second spring (20) is fixedly connected to one side of the sliding block (8), and one end of the second spring (20) is fixedly connected to one side of the inner wall of the long slot (6).

7. A plastic injection molding machine for easy demoulding according to claim 1, characterized in that: Both sides of the L-shaped rod (11) are provided with rounded corners (21).

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