Injection mold with core pulling mechanism

Abstract

The utility model relates to the technical field of injection molds, and particularly discloses an injection mold with a core pulling mechanism, which comprises a processing table, a lower mold is fixedly connected to the upper surface of the processing table, a guide groove is formed in the upper surface of the processing table, and a side mold is slidably connected to the inner wall of the guide groove in the processing table. A support is fixedly connected to the upper surface of the machining table, a hydraulic cylinder is fixedly connected to the upper surface of the support, a connecting plate is fixedly connected to the output end of the hydraulic cylinder, the connecting plate is slidably connected with the support, and an upper mold is fixedly connected to the lower surface of the connecting plate. According to the utility model, by arranging the smearing structure, after a plastic workpiece is subjected to injection molding processing, the sponge block can wipe lubricating oil on the arc surface of the inclined guide post, so that the friction force between the inclined guide post and the inclined guide hole is reduced, the service lives of the inclined guide post and the inclined guide hole are prolonged, and the condition that the matching precision of the inclined guide post and the inclined guide hole is reduced is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with a core-pulling mechanism. Background Art

[0002] Injection molds are important tools used in the injection molding process. They are mainly used to heat and melt the plastic raw materials, and then cool and shape them into the desired products through the shape of the mold. Among them, there is an injection mold with a core-pulling mechanism that allows the internal details or holes to be smoothly removed from the mold after the plastic part is molded.

[0003] In the prior art, when an injection mold with a core pulling mechanism is working, it is necessary to use the inclined guide pillars and the inclined guide holes on the side mold to control the movement of the side mold, so as to save the mold volume and reduce the number of driving components.

[0004] The above and existing technologies have the following defects: when the inclined guide pin is inserted into the inclined guide hole, due to the large friction between the inclined guide pin and the inclined guide hole, the inclined guide pin or the inclined guide hole is easily excessively worn, thereby affecting the matching accuracy of the inclined guide pin and the inclined guide hole.

[0005] Therefore, an injection mold with a core-pulling mechanism is proposed. Utility Model Content

[0006] The utility model aims to solve the problem that the inclined guide pins or the inclined guide holes are easily excessively worn due to the large friction between the inclined guide pins and the inclined guide holes, and proposes an injection mold with a core pulling mechanism.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an injection mold with a core-pulling mechanism, comprising a processing table, the upper surface of the processing table is fixedly connected to the lower mold, the upper surface of the processing table is provided with a guide groove, the inner wall of the guide groove on the processing table is slidably connected to the side mold, the upper surface of the processing table is fixedly connected to the bracket, the upper surface of the bracket is fixedly connected to the hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected to the connecting plate, the connecting plate is slidably connected to the bracket, the lower surface of the connecting plate is fixedly connected to the upper mold, the connecting plate The lower surface is fixedly connected with an inclined guide column, and the upper surface of the side mold is provided with an inclined guide hole. The size of the inclined guide column is adapted to the size of the inclined guide hole. The side wall of the lower mold is fixed and connected with an injection molding tube. The upper surface of the processing table is provided with a smearing structure, and the smearing structure includes a support plate, and the support plate is fixedly connected to the processing table. The side wall of the support plate is fixedly connected with an electric push rod, and the output end of the electric push rod is fixedly connected with a bending plate, and the surface of the bending plate is slidably connected with an extension plate, and the surface of the extension plate is fixedly connected with a sponge block, and the cross-section of the sponge block is trapezoidal.

[0008] The effect achieved by the above components is: by setting up the smearing structure, after the plastic workpiece is injection molded, the sponge block will wipe the lubricating oil on the arc surface of the inclined guide pin, thereby reducing the friction between the inclined guide pin and the inclined guide hole, extending the service life of the inclined guide pin and the inclined guide hole, and avoiding the occurrence of a decrease in the matching accuracy of the inclined guide pin and the inclined guide hole.

[0009] Preferably, an inclined block is fixedly connected to the surface of the bent plate, and the inclined block is in a stepped structure.

[0010] The effect achieved by the above components is that the inclined block with a step-shaped structure can guide the extension plate, thereby facilitating the extension plate to be sleeved on the surface of the bent plate.

[0011] Preferably, the extension plate is internally threaded with a bolt, and the bolt passes through the extension plate and abuts against the surface of the bent plate.

[0012] The effect achieved by the above components is: when the bolt is rotated, the bolt will move with the help of the thread and press against the surface of the bent plate, and the bolt can limit the position of the extension plate, thereby limiting the position of the sponge block.

[0013] Preferably, a round rod is slidably passed through the support plate, and the round rod is fixedly connected to the bending plate.

[0014] The effects achieved by the above components are as follows: the bending plate drives the round rod to slide along the supporting plate, and the round rod limits the moving path of the bending plate and supports the bending plate.

[0015] Preferably, the surface of the support plate is fixedly connected to a limiting plate, the inner wall of the limiting plate is slidably connected to a rectangular bar, the surface of the rectangular bar is fixedly connected to a supporting plate, the lower surface of the supporting plate is fixedly connected to a magnetic strip, the magnetic strip is against the surface of the extension plate, and the extension plate is an iron plate.

[0016] The effect achieved by the above components is that the support plate moves and contacts the connecting plate. At this time, the support plate reaches the position to limit the connecting plate, preventing the connecting plate from moving downward, thereby ensuring that the subsequent smearing operation can be carried out normally.

[0017] Preferably, a protrusion is fixedly connected to the surface of the rectangular strip, a through hole is opened on the surface of the limiting plate, and the protrusion is slidably connected to the inner wall of the through hole.

[0018] The effect achieved by the above components is that during the movement of the supporting plate, the protrusion will slide along the inner wall of the through hole, and the protrusion can prevent the rectangular strip from being out of contact with the limiting plate.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are:

[0020] In the utility model, by providing a smearing structure, after the plastic workpiece is injection molded, the sponge block will wipe the lubricating oil on the arc surface of the inclined guide pin, thereby reducing the friction between the inclined guide pin and the inclined guide hole, extending the service life of the inclined guide pin and the inclined guide hole, and avoiding the occurrence of a decrease in the matching accuracy of the inclined guide pin and the inclined guide hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the processing table of the utility model;

[0023] Figure 3 This is a structural diagram of the support plate of the utility model;

[0024] Figure 4 This is a structural diagram of the electric push rod of the utility model;

[0025] Figure 5 This is a schematic diagram of the split structure of the rectangular strip of the utility model.

[0026] Legend: 1. Processing table; 2. Lower mold; 3. Side mold; 4. Hydraulic cylinder; 5. Connecting plate; 6. Upper mold; 7. Inclined guide column; 8. Inclined guide hole; 9. Smearing structure; 901. Support plate; 902. Electric push rod; 903. Bending plate; 904. Extension plate; 905. Sponge block; 906. Inclined block; 907. Bolt; 908. Round rod; 909. Limiting plate; 910. Rectangular bar; 911. Support plate; 912. Magnetic strip; 913. Bump; 10. Injection tube; 11. Bracket. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0029] like Figure 1-Figure 5As shown, the utility model provides an injection mold with a core pulling mechanism, including a processing table 1, the upper surface of the processing table 1 is fixedly connected to the lower mold 2, the upper surface of the processing table 1 is provided with a guide groove, the inner wall of the guide groove on the processing table 1 is slidably connected to the side mold 3, the upper surface of the processing table 1 is fixedly connected to the bracket 11, the upper surface of the bracket 11 is fixedly connected to the hydraulic cylinder 4, the output end of the hydraulic cylinder 4 is fixedly connected to the connecting plate 5, the connecting plate 5 is slidably connected to the bracket 11, the lower surface of the connecting plate 5 is fixedly connected to the upper mold 6, the lower surface of the connecting plate 5 is fixedly connected to the oblique guide column 7, the upper surface of the side mold 3 is provided with an oblique guide hole 8, the size of the oblique guide column 7 is adapted to the size of the oblique guide hole 8, the side wall of the lower mold 2 is fixed It is also connected with an injection molding tube 10. The upper surface of the processing table 1 is provided with a smearing structure 9. The smearing structure 9 includes a support plate 901. The support plate 901 is fixedly connected to the processing table 1. The side wall of the support plate 901 is fixedly connected with an electric push rod 902. The output end of the electric push rod 902 is fixedly connected with a bending plate 903. The surface of the bending plate 903 is slidingly connected with an extension plate 904. The surface of the extension plate 904 is fixedly connected with a sponge block 905. The cross-section of the sponge block 905 is trapezoidal. The surface of the bending plate 903 is fixedly connected with an inclined block 906. The inclined block 906 is a step-shaped structure. The inclined block 906 with a step-shaped structure can guide the extension plate 904, thereby facilitating the extension plate 904 to be put on the surface of the bending plate 903.

[0030] like Figure 3-Figure 5 As shown, the extension plate 904 is connected to a bolt 907 through the internal thread, and the bolt 907 passes through the extension plate 904 and presses against the surface of the bent plate 903. When the bolt 907 is rotated, the bolt 907 will move with the help of the thread and press against the surface of the bent plate 903. The bolt 907 reaches the position of limiting the extension plate 904, thereby limiting the position of the sponge block 905. A round rod 908 slides through the support plate 901, and the round rod 908 is fixedly connected to the bent plate 903. The bent plate 903 will drive the round rod 908 to slide along the support plate 901. The round rod 908 reaches the function of limiting the moving path of the bent plate 903 and supporting the bent plate 903. The surface of the support plate 901 is fixedly connected to the limiting plate 909, and the inner wall of the limiting plate 909 is slidably connected to a rectangular 910, the surface of the rectangular strip 910 is fixedly connected to a support plate 911, and the lower surface of the support plate 911 is fixedly connected to a magnetic strip 912, and the magnetic strip 912 is against the surface of the extension plate 904. The extension plate 904 is an iron plate, and the support plate 911 moves and contacts the connecting plate 5. At this time, the support plate 911 reaches the position of limiting the connecting plate 5, preventing the connecting plate 5 from moving downward, ensuring that the subsequent smearing operation can be carried out normally, and the surface of the rectangular strip 910 is fixedly connected to a protrusion 913, and the surface of the limiting plate 909 is provided with a through hole, and the protrusion 913 is slidably connected to the inner wall of the through hole. During the movement of the support plate 911, the protrusion 913 will slide along the inner wall of the through hole, and the protrusion 913 can prevent the rectangular strip 910 from being out of contact with the limiting plate 909.

[0031] Its overall working principle is that when it is necessary to injection mold a plastic workpiece, the output end of the hydraulic cylinder 4 is controlled to extend, and the connecting plate 5 will drive the upper mold 6 and the inclined guide column 7 to move downward. When the inclined guide column 7 is inserted into the inner wall of the inclined guide hole 8, the inclined guide column 7 will squeeze the side mold 3, and the side mold 3 will slide along the inner wall of the guide groove on the processing table 1 and contact with the lower mold 2. At this time, the upper mold 6 will also contact the lower mold 2, and then the plastic raw material will be injected into the mold through the injection tube 10. After waiting for cooling, the plastic workpiece can be obtained. When it is necessary to apply lubricating oil to the arc surface of the inclined guide column 7, first control the output end of the electric push rod 902 to extend. The output end of the electric push rod 902 will move the bending plate 903 to the top of the connecting plate 5, and the bending plate 903 will drive the arc surface The rod 908 slides along the support plate 901, and the round rod 908 reaches the function of limiting the moving path of the bending plate 903 and supporting the bending plate 903, and then the extension plate 904 is put on the surface of the bending plate 903. In this process, the inclined block 906 with a step structure can guide the extension plate 904, so as to facilitate the extension plate 904 to be put on the surface of the bending plate 903. Then, the bolt 907 is turned, and the bolt 907 will move with the help of the thread and press against the surface of the bending plate 903. The bolt 907 reaches the function of limiting the position of the extension plate 904, thereby limiting the position of the sponge block 905. Then, the lubricating oil is dripped into the sponge block 905, and then the output end of the electric push rod 902 is controlled to contract, and the bending plate 903 is removed from the connecting plate. 5 is moved away, and then the output end of the hydraulic cylinder 4 is controlled to shrink, and the side mold 3 and the upper mold 6 will be out of contact with the lower mold 2. When the connecting plate 5 moves to an appropriate height, the output end of the electric push rod 902 is controlled to extend, and the bending plate 903 will drive the extension plate 904 to move. Since the magnetic strip 912 is attracted to the surface of the extension plate 904, the extension plate 904 will drive the magnetic strip 912 to move, and the movement of the magnetic strip 912 will drive the supporting plate 911 to move. The movement of the supporting plate 911 will contact with the connecting plate 5. At this time, the supporting plate 911 reaches the position of limiting the connecting plate 5, preventing the connecting plate 5 from moving downward, ensuring that the subsequent smearing operation can be carried out normally. The extension plate 904 continues to slide to make the sponge block 905 contact with the inclined guide column 7, and the sponge block 90 5 will wipe the lubricating oil on the arc surface of the inclined guide column 7, thereby reducing the friction between the inclined guide column 7 and the inclined guide hole 8, extending the service life of the inclined guide column 7 and the inclined guide hole 8, and avoiding the decrease in the matching accuracy of the inclined guide column 7 and the inclined guide hole 8. After the application is completed, the output end of the electric push rod 902 is controlled to retract. When the extension plate 904 moves a certain distance in the opposite direction, it will contact the magnetic strip 912 again. The extension plate 904 will drive the magnetic strip 912 to move, so that the supporting plate 911 is out of contact with the connecting plate 5, thereby releasing the limit on the connecting plate 5. During the movement of the supporting plate 911, the protrusion 913 will slide along the inner wall of the through hole, and the protrusion 913 can prevent the rectangular bar 910 from being out of contact with the limiting plate 909.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An injection mold with a core-pulling mechanism, comprising a processing table (1), characterized in that: The upper surface of the processing table (1) is fixedly connected to the lower mold (2), the upper surface of the processing table (1) is provided with a guide groove, the inner wall of the guide groove of the processing table (1) is slidably connected to the side mold (3), the upper surface of the processing table (1) is fixedly connected to the bracket (11), the upper surface of the bracket (11) is fixedly connected to the hydraulic cylinder (4), the output end of the hydraulic cylinder (4) is fixedly connected to the connecting plate (5), the connecting plate (5) is slidably connected to the bracket (11), the lower surface of the connecting plate (5) is fixedly connected to the upper mold (6), the lower surface of the connecting plate (5) is fixedly connected to the inclined guide column (7), the upper surface of the side mold (3) is provided with an inclined guide hole (8), the inclined guide hole (9) is fixedly connected to the upper mold (6), and the inclined guide hole (10) is fixedly connected to the upper mold (6). The size of the column (7) is adapted to the size of the oblique guide hole (8); the side wall of the lower mold (2) is fixed and connected to an injection molding tube (10); the upper surface of the processing table (1) is provided with a smearing structure (9); the smearing structure (9) comprises a support plate (901); the support plate (901) is fixedly connected to the processing table (1); the side wall of the support plate (901) is fixedly connected to an electric push rod (902); the output end of the electric push rod (902) is fixedly connected to a bending plate (903); the surface of the bending plate (903) is slidably connected to an extension plate (904); the surface of the extension plate (904) is fixedly connected to a sponge block (905); the cross section of the sponge block (905) is trapezoidal.

2. The injection mold with a core-pulling mechanism according to claim 1, characterized in that: An inclined block (906) is fixedly connected to the surface of the bending plate (903), and the inclined block (906) is in a step structure.

3. The injection mold with a core-pulling mechanism according to claim 1, characterized in that: The extension plate (904) is internally threaded with a bolt (907), and the bolt (907) passes through the extension plate (904) and abuts against the surface of the bent plate (903).

4. The injection mold with a core-pulling mechanism according to claim 1, characterized in that: A round rod (908) is slidably inserted into the support plate (901), and the round rod (908) is fixedly connected to the bending plate (903).

5. The injection mold with a core-pulling mechanism according to claim 1, characterized in that: The surface of the support plate (901) is fixedly connected to a limit plate (909); the inner wall of the limit plate (909) is slidably connected to a rectangular bar (910); the surface of the rectangular bar (910) is fixedly connected to a supporting plate (911); the lower surface of the supporting plate (911) is fixedly connected to a magnetic bar (912); the magnetic bar (912) abuts against the surface of the extension plate (904); and the extension plate (904) is an iron plate.

6. The injection mold with a core-pulling mechanism according to claim 5, characterized in that: A protrusion (913) is fixedly connected to the surface of the rectangular strip (910), a through hole is opened on the surface of the limiting plate (909), and the protrusion (913) is slidably connected to the inner wall of the through hole.

Images