Upper and lower mold dual-positioning split plastic mold

Abstract

The utility model relates to an upper and lower mold dual-positioning split plastic mold which comprises a base with a frame, the lower die is arranged at the top of the base; an upper mold with a feeding pipe is mounted in the frame through two air cylinders; a guide piece used for sliding of the upper mold is arranged in the frame; the guide part comprises two supporting columns fixedly installed between the base and the frame, the air cylinder is started to drive the upper mold to move, the upper mold can slide on the two supporting columns, balls are arranged in a groove body of the upper mold, and along with movement of the upper mold, the balls can slide in strip-shaped grooves in the surfaces of the supporting columns and roll in circular grooves, so that the upper mold is fixed to the upper mold. And two dustproof rings are installed in the groove body, the two dustproof rings are located at the tops and the bottoms of the balls correspondingly, convex parts on the surfaces of the dustproof rings can be attached to the interiors of the strip-shaped grooves, and the effect of scraping dust in the strip-shaped grooves can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic mold equipment, in particular to a plastic mold with upper and lower molds having dual positioning. Background Art

[0002] Plastic molds are tools used in the plastic processing industry to match plastic molding machines and give plastic products complete configurations and precise dimensions. In the prior art, when the upper mold of a plastic mold is moved relative to the lower mold under the drive of a hydraulic cylinder, it is mainly positioned by guide posts and guide holes. Due to the large friction and wear between the guide posts and the guide holes, the guiding accuracy between the guide components is poor, thereby reducing the closing accuracy of the mold. At the same time, the lower mold is mostly fixed and has no buffering protection for long-term impact. During the stamping or die-casting process, the molten metal or stamping parts directly impact the lower mold. The mold without buffering protection will bear the entire impact force, which can easily cause wear, deformation, or even cracking of the mold surface, shortening the service life of the mold.

[0003] For example, the authorized patent document with application number CN201921805863.0 discloses a plastic display stand injection mold, which includes a base, a fixed plate and a positioning plate fixedly installed on the top of the base, and a hydraulic cylinder fixedly installed at one end of the fixed plate, and the movable shaft of the hydraulic cylinder passes through the fixed plate and is fixedly connected to the movable plate, and four guide pillars are fixedly connected between the fixed plate and the positioning plate, and the movable plate is arranged on the guide pillars, and the movable plate is slidably connected on the guide pillars. In this plastic display stand injection mold, an electric push rod pushes the collection box to move to the injection head of the injection molding machine, and the plastic extruded by the injection molding machine falls into the collection box, which makes it convenient to check the plastic melting situation and prevent the plastic from falling on the equipment for easy cleaning. After that, the collection device automatically moves down, and the injection molding machine moves to dock with the injection port on the positioning plate. After that, the hydraulic cylinder pushes the movable plate to move, so that the movable plate drives the movable mold on it to fit with the fixed mold on the positioning plate, and then the injection molding machine starts injection molding.

[0004] The above patent has the problem of large friction and wear between the guide column and the guide hole, resulting in poor guiding accuracy between the guide components. At the same time, the lower mold is mostly fixed and has no buffer protection against long-term impact. Therefore, we need to provide a double-positioned plastic mold with upper and lower molds. Utility Model Content

[0005] The purpose of the present utility model is to provide a plastic mold with double positioning of the upper and lower molds. When the cylinder is started to drive the upper mold to move, the upper mold will slide on two support columns, and ball bearings are arranged in the groove body of the upper mold. As the upper mold moves, the ball bearings will slide in the strip grooves on the surface of the support columns, and the ball bearings will roll in the circular grooves, thereby reducing the friction force during the movement of the upper mold. And two dust-proof rings are installed in the groove body, and the two dust-proof rings are respectively located at the top and bottom of the ball bearings, and the convex parts on the surface of the dust-proof rings can fit in the strip grooves, which can scrape the dust in the strip grooves, so as to ensure that there are no foreign objects when the ball bearings roll. At the same time, four guiding grooves are opened on the upper mold for the insertion of four guiding columns. When the upper mold impacts the lower mold, the lower mold will move in the guiding frame and drive four rod bodies to move. The rod bodies drive the sealing disc to move in the barrel. Since the barrel on the top of the sealing piston is filled with damping oil, and the surface of the sealing disc is provided with flow holes, as the sealing disc moves, the damping oil flows through the flow holes, thereby generating a damping force. And the barrel at the bottom of the sealing piston is filled with gas. As the sealing piston moves, the gas below is compressed, having a double buffering effect. Among them, the spring is used for the reset of the lower mold to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A plastic mold with double positioning of the upper and lower molds, comprising:

[0007] A base with a frame;

[0008] And a lower mold arranged on the top of the base;

[0009] The upper mold with a feed pipe is installed inside the frame through two cylinders;

[0010] A guiding member for the sliding of the upper mold is arranged inside the frame;

[0011] The guiding member includes two support columns fixedly installed between the base and the frame. The surfaces of the two support columns are slidably installed inside the lower mold. Groove bodies for the sliding of the two support columns are opened on the surface of the upper mold. Three circular grooves are opened inside the two groove bodies, and ball bearings are rotatably installed inside the three circular grooves. Strip grooves for the sliding of the three ball bearings are opened on the surface of the support columns.

[0012] Preferably, dust-proof rings are fixedly installed at the top and bottom of the groove body. Three arc-shaped convex parts are integrally processed inside the two dust-proof rings, and the arc-shaped convex parts are adapted to the strip grooves on the surface of the support columns.

[0013] Preferably, four guiding columns are fixedly installed on the top of the lower mold. Guiding grooves for the sliding installation of the four guiding columns are opened inside the upper mold, and the tops of the four guiding columns are conical.

[0014] Preferably, an energy absorber for cushioning the lower die is further included. The energy absorber includes four rod bodies fixedly installed on the lower die. Barrels are arranged at the bottoms of the four rod bodies. The four barrels are all embedded inside the base. A sealing disc is fixedly installed at the bottom of the rod body. The surface of the sealing disc is in close fit with the inner wall of the barrel. Four circulation holes are formed on the surface of the sealing disc. A sealing piston is slidably installed inside the barrel.

[0015] Preferably, springs are movably sleeved on the surfaces of the four rod bodies. The springs are arranged between the lower die and the base.

[0016] Preferably, a guiding frame is fixedly installed on the top of the base. The inner wall of the guiding frame is slidably installed with the surface of the lower die.

[0017] Preferably, four air permeable grooves are formed inside the lower die.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] In the present utility model, during the movement of the upper die through the guiding member, the frictional force is reduced, the wear consumption is lowered, and the problem of large frictional wear is avoided. The sliding friction enables the frictional force to become smaller, and a double positioning effect on the upper and lower dies is achieved. Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0021] Figure 2 is a three-dimensional sectional view of the guiding frame of the present utility model;

[0022] Figure 3 is a partial structural exploded view of the present utility model;

[0023] Figure 4 is a three-dimensional view of the energy absorber of the present utility model.

[0024] In the figure: 1. Base; 2. Frame; 3. Lower die; 4. Upper die; 5. Guiding member; 51. Support column; 52. Groove; 53. Round groove; 54. Ball; 55. Strip-shaped groove; 6. Dust-proof ring; 7. Guiding column; 8. Guiding groove; 9. Energy absorber; 91. Rod body; 92. Barrel; 93. Sealing disc; 94. Circulation hole; 95. Sealing piston; 10. Spring; 11. Guiding frame; 12. Air permeable groove. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-4 , the present invention provides a technical solution: an upper and lower die double-positioning plastic mold, including:

[0027] A base 1 with a frame 2;

[0028] And a lower die 3 provided on the top of the base 1;

[0029] An upper die 4 with a feed pipe is installed inside the frame 2 through two cylinders;

[0030] A guide member 5 for sliding the upper die 4 is provided inside the frame 2;

[0031] The guide member 5 includes two support columns 51 fixedly installed between the base 1 and the frame 2. The surfaces of the two support columns 51 are slidably installed inside the lower die 3. Grooves 52 for the two support columns 51 to slide are formed on the surface of the upper die 4. Three circular grooves 53 are formed inside the two grooves 52. Ball bearings 54 are rotatably installed inside the three circular grooves 53. Strip-shaped grooves 55 for the three ball bearings 54 to slide are formed on the surface of the support column 51.

[0032] Dust-proof rings 6 are fixedly installed at the top and bottom of the groove 52. Three arc-shaped protrusions are integrally processed inside the two dust-proof rings 6. The arc-shaped protrusions are adapted to the strip-shaped grooves 55 on the surface of the support column 51;

[0033] In this embodiment, the two cylinders are synchronous cylinders. The starting cylinder drives the upper die 4 to move. The upper die 4 will slide on the two support columns 51. And there are ball bearings 54 arranged in the groove body 52 of the upper die 4. As the upper die 4 moves, the ball bearings 54 will slide in the strip-shaped grooves 55 on the surface of the support columns 51, and the ball bearings 54 roll in the circular grooves 53, thereby reducing the frictional force for the movement of the upper die 4. And two dust-proof rings 6 are installed in the groove body 52. The two dust-proof rings 6 are respectively located at the top and bottom of the ball bearings 54. And the convex parts on the surface of the dust-proof rings 6 can fit in the strip-shaped grooves 55, which can scrape the dust in the strip-shaped grooves 55, so as to ensure that there are no foreign objects when the ball bearings 54 roll. At the same time, four guiding grooves 8 are opened on the upper die 4 for the insertion of four guiding columns 7. When the upper die 4 impacts the lower die 3, the lower die 3 will move in the guiding frame 11 and drive the four rod bodies 91 to move. The rod bodies 91 drive the sealing disc 93 to move in the barrel body 92. Since the barrel body 92 at the top of the sealing piston 95 is filled with damping oil, and there are flow holes 94 opened on the surface of the sealing disc 93. As the sealing disc 93 moves, the damping oil flows through the flow holes 94, thereby generating a damping force. And the barrel body 92 at the bottom of the sealing piston 95 is filled with gas. As the sealing piston 95 moves, the gas below is compressed, having a double buffering effect. Among them, the spring 10 is used for the reset of the lower die 3.

[0034] Four guiding columns 7 are fixedly installed at the top of the lower die 3. Guiding grooves 8 for the sliding installation of the four guiding columns 7 are opened inside the upper die 4. And the tops of the four guiding columns 7 are conical.

[0035] It should be noted that the tops of the guiding columns 7 are conical. The conical limit can provide better positioning accuracy. When the molds are combined, the conical alignment posts can easily find the corresponding mating holes and maintain stable positioning through the nesting of the conical shape. This design helps to ensure the correct positioning and alignment of the molds during assembly and use, reducing errors.

[0036] It also includes an energy-absorbing part 9 for buffering the lower die 3. The energy-absorbing part 9 includes four rod bodies 91 fixedly installed on the lower die 3. Barrel bodies 92 are arranged at the bottoms of the four rod bodies 91. The four barrel bodies 92 are all embedded inside the base 1. A sealing disc 93 is fixedly installed at the bottom of the rod body 91. The surface of the sealing disc 93 is closely attached to the inner wall of the barrel body 92. Four flow holes 94 are opened on the surface of the sealing disc 93. A sealing piston 95 is slidably installed inside the barrel body 92.

[0037] It should be noted that when the upper die 4 impacts the lower die 3, the lower die 3 will move within the guide frame 11 and drive the four rod bodies 91 to move. The rod bodies 91 drive the sealing disc 93 to move within the barrel 92. Since the barrel 92 at the top of the sealing piston 95 is filled with shock-absorbing oil and the surface of the sealing disc 93 is provided with a circulation hole 94, as the sealing disc 93 moves, the shock-absorbing oil circulates through the circulation hole 94, thereby generating a damping force. And the barrel 92 at the bottom of the sealing piston 95 is filled with gas. As the sealing piston 95 moves, the gas below is compressed, having a dual buffering effect.

[0038] The surfaces of the four rod bodies 91 are all movably sleeved with springs 10, and the springs 10 are arranged between the lower die 3 and the base 1;

[0039] Among them, the spring 10 is used for the reset function of the lower die 3.

[0040] The top of the base 1 is fixedly installed with a guide frame 11, and the inner wall of the guide frame 11 is slidably installed with the surface of the lower die 3;

[0041] The guide frame 11 also plays a role in guiding and positioning the movement of the lower die 3.

[0042] In order to prevent the lower die 3 from moving downward and causing the air below to be compressed, air vent grooves 12 are provided for the circulation of gas, and four air vent grooves 12 are opened inside the lower die 3.

[0043] When the device starts, the air cylinder drives the upper die 4 to move. The upper die 4 will slide on the two support columns 51, and there are ball bearings 54 in the groove 52 of the upper die 4. As the upper die 4 moves, the ball bearings 54 will slide in the strip-shaped grooves 55 on the surface of the support columns 51, and the ball bearings 54 roll in the round grooves 53, thereby reducing the friction force of the movement of the upper die 4. And two dust-proof rings 6 are installed in the groove 52. The two dust-proof rings 6 are respectively located at the top and bottom of the ball bearings 54, and the convex parts on the surface of the dust-proof rings 6 can fit into the strip-shaped grooves 55, which can scrape the dust in the strip-shaped grooves 55, so as to ensure that there are no foreign objects when the ball bearings 54 roll. At the same time, four guide grooves 8 are opened on the upper die 4 for the insertion of the four guide posts 7. When the upper die 4 impacts the lower die 3, the lower die 3 will move within the guide frame 11 and drive the four rod bodies 91 to move. The rod bodies 91 drive the sealing disc 93 to move within the barrel 92. Since the barrel 92 at the top of the sealing piston 95 is filled with shock-absorbing oil and the surface of the sealing disc 93 is provided with a circulation hole 94, as the sealing disc 93 moves, the shock-absorbing oil circulates through the circulation hole 94, thereby generating a damping force. And the barrel 92 at the bottom of the sealing piston 95 is filled with gas. As the sealing piston 95 moves, the gas below is compressed, having a dual buffering effect. Among them, the spring 10 is used for the reset function of the lower die 3.

[0044] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A plastic mold with double positioning for the upper and lower molds, characterized in that, Comprising: A base (1) with a frame (2); And a lower die (3) arranged on the top of the base (1); Inside the frame (2), an upper die (4) with a feed pipe is installed through two cylinders; A guide member (5) for the sliding of the upper die (4) is arranged inside the frame (2); The guide member (5) includes two support columns (51) fixedly installed between the base (1) and the frame (2). The surfaces of the two support columns (51) are both slidably installed inside the lower die (3). Grooves (52) for the sliding of the two support columns (51) are formed on the surface of the upper die (4). Three circular grooves (53) are formed inside each of the two grooves (52). Ball bearings (54) are rotatably installed inside each of the three circular grooves (53). Strip-shaped grooves (55) for the sliding of the three ball bearings (54) are formed on the surface of the support column (51).

2. The plastic mold with double positioning of the upper and lower molds according to claim 1, characterized in that: Dust-proof rings (6) are fixedly installed at the top and bottom of the groove (52). Three arc-shaped convex parts are integrally processed inside each of the two dust-proof rings (6). The arc-shaped convex parts are adapted to the strip-shaped grooves (55) on the surface of the support column (51).

3. A plastic mold with double positioning of the upper and lower molds according to claim 1, characterized in that: Four guide posts (7) are fixedly installed at the top of the lower die (3). Guide grooves (8) for the sliding installation of the four guide posts (7) are formed inside the upper die (4), and the tops of the four guide posts (7) are conical.

4. A plastic mold with double positioning of the upper and lower molds according to claim 1, characterized in that: An energy-absorbing member (9) for buffering the lower die (3) is further included. The energy-absorbing member (9) includes four rod bodies (91) fixedly installed on the lower die (3). Barrels (92) are arranged at the bottoms of the four rod bodies (91). The four barrels (92) are all embedded inside the base (1). A sealing disc (93) is fixedly installed at the bottom of the rod body (91). The surface of the sealing disc (93) is in close fit with the inner wall of the barrel (92). Four circulation holes (94) are formed on the surface of the sealing disc (93). A sealing piston (95) is slidably installed inside the barrel (92).

5. A plastic mold with double positioning of the upper and lower molds according to claim 4, characterized in that: Springs (10) are movably sleeved on the surfaces of the four rod bodies (91). The springs (10) are arranged between the lower die (3) and the base (1).

6. The double-positioning plastic mold for upper and lower molds according to claim 5, characterized in that: A guide frame (11) is fixedly installed at the top of the base (1). The inner wall of the guide frame (11) is slidably installed with the surface of the lower die (3).

7. A plastic mold with double positioning of upper and lower molds according to claim 6, characterized in that: Four air-permeable grooves (12) are formed inside the lower die (3).

Images