Pressing device for plastic product production

Abstract

The utility model provides a compression device for plastic product production, which comprises a compression molding machine table, a compression molding lower die is mounted on the surface of the compression molding machine table, four guide upright posts are mounted on the compression molding machine table, one end of each guide upright post penetrates through the compression molding lower die and is fixedly connected with a hydraulic seat, a compression molding upper die is movably arranged on the guide upright posts, and the hydraulic seat is fixedly connected with the compression molding upper die. The guide stand columns movably penetrate through the edge of the compression molding upper mold, a hydraulic pump is installed in the hydraulic base, an output shaft of the hydraulic pump penetrates through the hydraulic base and is fixedly connected with a push plate, and the two sides of the push plate are rotationally connected with turning plates; according to the utility model, the locking rod is arranged on the pressing equipment of the compression molding machine table, and the self-locking purpose of the upper and lower molds is realized by utilizing the supporting function of the locking rod, so that the self-locking purpose and the mold locking support can be realized while pressing during processing, and a plastic product in the upper and lower molds can be stably formed.

Description

Technical Field

[0001] The utility model belongs to the field of plastic product production, in particular to a pressing device for plastic product production. Background Art

[0002] When processing plastic sheets, the sheets to be molded are usually softened, and after softening, they are spread on the compression molding machine and pressed and formed by the upper and lower molds. During compression molding, it is necessary to perform a pressure holding operation. After compression molding, pressure is continuously applied to compact the melt and increase the density of the plastic (densification) to compensate for the shrinkage behavior of the plastic. During the pressure holding process, the back pressure is high because the mold cavity is already filled with plastic. During the pressure holding and compaction process, the screw of the injection molding machine can only move forward slowly and slightly, and the flow speed of the plastic is also relatively slow. The flow at this time is called pressure holding flow. Since the plastic is cooled and solidified faster by the mold wall during the pressure holding stage, the melt viscosity also increases rapidly, so the resistance in the mold cavity is very large. In the later stage of pressure holding, the material density continues to increase, and the plastic parts are gradually formed. Pressure is the main factor affecting the pressure holding process. During the pressure holding process, the plastic has filled the mold cavity, and the gradually solidified melt at this time serves as a medium for transmitting pressure. The pressure in the mold cavity is transmitted to the mold wall surface with the help of plastic, which has a tendency to push the mold open. Therefore, appropriate clamping force is required for clamping. However, if the clamping pressure at different parts of the compression mold is different during the clamping process, it is easy to cause burrs, overflows, and even push the mold open.

[0003] In summary, the utility model provides a pressing device for producing plastic products to solve the above problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a clamping device for plastic product production to solve the problems in the prior art that if the clamping pressure at different parts of the compression mold is different during the clamping process, it is easy to cause burrs, overflow, and even open the mold.

[0005] A clamping device for producing plastic products, comprising a compression molding machine platform, a compression molding lower mold is installed on the surface of the compression molding machine platform, four guide columns are installed on the compression molding machine platform, one end of the guide column passes through the compression molding lower mold and is fixedly connected to a hydraulic seat, a compression molding upper mold is movably arranged on the guide column, the guide columns respectively movably pass through the edges of the compression molding upper mold, a hydraulic pump is installed in the hydraulic seat, the output shaft of the hydraulic pump passes through the hydraulic seat and is fixedly connected to a push plate, both sides of the push plate are rotatably connected to a turning plate, the turning plate The end of the upper part away from the push plate is rotatably connected with locking rod one and locking rod two, and one end of the locking rod one and locking rod two is rotatably connected to each other, the end of the locking rod one away from the turning plate is fixedly connected to the surface of the compression molding upper mold through an adapter block, the end of the locking rod two away from the turning plate is rotatably connected to a supporting sleeve plate, the surface movable sleeve of the guide column is provided with a restraining sleeve, one side of the restraining sleeve is an open structure, and is rotatably connected with a linkage gear, one side of the linkage gear is provided with a gear directional plate, and the gear directional plate is fixedly connected to the guide column.

[0006] Furthermore, the support sleeve is a "T"-shaped structure, and both ends of the support sleeve are respectively fixedly connected to two of the guide columns, and the other end of the support sleeve is rotatably connected to the second locking rod.

[0007] Furthermore, one end of the locking rod 1 is rotatably connected to the locking rod 2.

[0008] Furthermore, a side surface of the restraint sleeve away from the opening is in active contact with the side wall of the guide column, the restraint sleeve is arranged below the support sleeve plate, and support brackets are passed on both sides of the opening of the restraint sleeve.

[0009] Furthermore, the support frame is a "U"-shaped structure, and the bottom of the support frame is fixedly connected to the surface of the compression molding upper mold through a gear support rod.

[0010] Furthermore, the two linkage gears on the same side of the push plate are fixedly connected via a linkage guide shaft, and both ends of the linkage guide shaft movably penetrate the restraining sleeve and are fixedly connected to the center of the linkage gear.

[0011] Furthermore, the gear directional plate is arranged along the length direction of the guide column, and the linkage gear is meshed with teeth on the gear directional plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model realizes the self-locking purpose of the upper and lower molds by arranging a locking rod on the clamping device of the compression molding machine and utilizing the supporting function of the locking rod. Therefore, during processing, the self-locking purpose can be achieved while clamping, and the clamping mold support enables the plastic products in the upper and lower molds to be stably formed.

[0014] 2. The utility model provides synchronously rotating linkage gears on both sides of the self-locking structure, so that the pressure applied at the four vertices of the upper mold can be equal while adjusting the mold height up and down. When self-locking, it ensures that the clamping force between the molds is more uniform and the mold molding is more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a three-dimensional diagram of the compression mold of the utility model;

[0017] Figure 3 This is a front view schematic diagram of the compression mold of the utility model;

[0018] Figure 4 It is a stereoscopic diagram of the locking rod of the utility model.

[0019] In the figure:

[0020] 1. Compression molding machine table; 2. Compression molding lower mold; 3. Compression molding upper mold; 4. Guide column; 5. Hydraulic seat; 6. Support sleeve; 7. Constraint sleeve; 8. Locking rod one; 9. Locking rod two; 10. Turning plate; 11. Gear support rod; 12. Gear directional plate; 13. Linkage gear; 14. Linkage guide shaft; 15. Push plate. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] like Figure 1-4As shown, the utility model provides a clamping device for producing plastic products, including a compression molding machine table 1, a compression molding lower mold 2 is installed on the surface of the compression molding machine table 1, four guide columns 4 are installed on the compression molding machine table 1, one end of the guide column 4 penetrates the compression molding lower mold 2 and is fixedly connected to a hydraulic seat 5, a compression molding upper mold 3 is movably arranged on the guide column 4, and the guide columns 4 respectively movably penetrate the edges of the compression molding upper mold 3, a hydraulic pump is installed in the hydraulic seat 5, the output shaft of the hydraulic pump penetrates the hydraulic seat 5, and is fixedly connected to a push plate 15, both sides of the push plate 15 are rotatably connected to a turning plate 10, and the turning plate 10 The end of the upper part away from the push plate 15 is rotatably connected with a locking rod 1 8 and a locking rod 2 9, and one end of the locking rod 1 8 and the locking rod 2 9 are rotatably connected to each other, the end of the locking rod 1 8 away from the turning plate 10 is fixedly connected to the surface of the compression molding upper mold 3 through a transfer block, the end of the locking rod 29 away from the turning plate 10 is rotatably connected with a support sleeve plate 6, a movable sleeve on the surface of the guide column 4 is provided with a restraining sleeve 7, one side of the restraining sleeve 7 is an open structure, and is rotatably connected with a linkage gear 13, a gear directional plate 12 is provided on one side of the linkage gear 13, and the gear directional plate 12 is fixedly connected to the guide column 4.

[0023] As an implementation mode of the utility model, the support sleeve 6 is a "T"-shaped structure, the two ends of the support sleeve 6 are respectively fixedly connected to two of the guide columns 4, and the other end of the support sleeve 6 is rotatably connected to the locking rod 2 9.

[0024] As an implementation mode of the present utility model, the locking rod 1 8 is rotatably connected to one end of the locking rod 2 9 .

[0025] As an implementation mode of the utility model, a side surface of the restraint sleeve 7 away from the opening is in active contact with the side wall of the guide column 4, the restraint sleeve 7 is arranged below the support sleeve plate 6, and the two sides of the opening of the restraint sleeve 7 pass through the support frame.

[0026] As an implementation mode of the utility model, the support frame is a "U"-shaped structure, and the bottom of the support frame is fixedly connected to the surface of the compression molding upper mold 3 through a gear support rod 11.

[0027] As an implementation mode of the utility model, the two linkage gears 13 on the same side of the push plate 15 are fixedly connected via a linkage guide shaft 14 , and both ends of the linkage guide shaft 14 respectively movably penetrate the restraining sleeve 7 and are fixedly connected to the center of the linkage gear 13 .

[0028] As an implementation mode of the present utility model, the gear directional plate 12 is arranged along the length direction of the guide column 4 , and the linkage gear 13 is meshed with the teeth on the gear directional plate 12 .

[0029] Specific working principle:

[0030] During compression molding, the hydraulic seat 5 pushes the compression molding upper mold 3 close to the compression molding lower mold 2, thereby pressing the mold;

[0031] When pressing, the push plate 15 pushes the turning plate 10 downward, and the turning plate 10 pushes the locking rod 1 8 and the locking rod 2 9 on both sides to expand. Figure 3-4 , until it is in a vertical alignment state, completing the self-locking function;

[0032] When the compression molding upper mold 3 descends, the linkage gears 13 on both sides slide along the gear directional plate 12 and rotate. The linkage gears 13 on both sides are synchronized by the linkage guide shaft 14. Therefore, the rotation frequency of the linkage gears 13 on both sides is the same, that is, the heights at which the compression molding upper mold 3 descends on both sides are the same, and the force applied by the compression molding upper mold 3 to the compression molding lower mold 2 is the same.

[0033] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The implementation modes of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A clamping device for producing plastic products, comprising a compression molding machine table (1), a compression molding lower mold (2) being installed on the surface of the compression molding machine table (1), four guide columns (4) being installed on the compression molding machine table (1), one end of the guide column (4) passing through the compression molding lower mold (2) and being fixedly connected to a hydraulic seat (5), a compression molding upper mold (3) being movably arranged on the guide column (4), and the guide columns (4) respectively movably passing through the edges of the compression molding upper mold (3), characterized in that: A hydraulic pump is installed in the hydraulic seat (5), the output shaft of the hydraulic pump passes through the hydraulic seat (5) and is fixedly connected to a push plate (15), both sides of the push plate (15) are rotatably connected to a turning plate (10), one end of the turning plate (10) away from the push plate (15) is rotatably connected to a locking rod 1 (8) and a locking rod 2 (9), and one end of the locking rod 1 (8) and the locking rod 2 (9) are rotatably connected to each other, and the end of the locking rod 1 (8) away from the turning plate (10) is rotatably connected to the turning plate (10). The second locking rod (9) is fixedly connected to the surface of the compression molding upper mold (3) through an adapter block, and one end of the locking rod (9) away from the turning plate (10) is rotatably connected to a support sleeve plate (6). The surface of the guide column (4) is movably sleeved with a restraining sleeve (7), one side of the restraining sleeve (7) is an open structure and is rotatably connected to a linkage gear (13), one side of the linkage gear (13) is provided with a gear orientation plate (12), and the gear orientation plate (12) is fixedly connected to the guide column (4).

2. The pressing device for plastic product production as claimed in claim 1, characterized in that: The support sleeve (6) is a "T"-shaped structure, and the two ends of the support sleeve (6) are respectively fixedly connected to two of the guide columns (4), and the other end of the support sleeve (6) is rotatably connected to the second locking rod (9).

3. The pressing device for plastic product production as claimed in claim 1, characterized in that: The locking rod 1 (8) is rotatably connected to one end of the locking rod 2 (9).

4. The pressing device for plastic product production as claimed in claim 1, characterized in that: A side surface of the restraining sleeve (7) away from the opening is in active contact with the side wall of the guide column (4); the restraining sleeve (7) is arranged below the supporting sleeve plate (6); and support frames are passed on both sides of the opening of the restraining sleeve (7).

5. The pressing device for producing plastic products as claimed in claim 4, characterized in that: The support frame is a "U"-shaped structure, and the bottom of the support frame is fixedly connected to the surface of the compression molding upper mold (3) through a gear support rod (11).

6. The pressing device for producing plastic products as claimed in claim 1, characterized in that: The two linkage gears (13) on the same side of the push plate (15) are fixedly connected via a linkage guide shaft (14), and both ends of the linkage guide shaft (14) are movably inserted through the restraining sleeve (7) and are fixedly connected to the center of the linkage gear (13).

7. The pressing device for plastic product production as claimed in claim 1, characterized in that: The gear orientation plate (12) is arranged along the length direction of the guide column (4), and the linkage gear (13) is meshed with the teeth on the gear orientation plate (12).

Images