Plastic sheet forming extrusion die

Abstract

This utility model relates to the field of extrusion die technology, specifically disclosing a plastic sheet shaping extrusion die, including a die housing, a discharge port fixedly connected to one side of the die housing, and a lower die plate disposed at the bottom of the discharge port. A cam is slidably disposed at the bottom of the lower die plate, and the cam is fixedly connected to a rotating rod. This utility model, by setting up a die housing, a lower die plate, a cam, a rotating rod, a discharge port, and a limiting component, allows the rotating rod to drive the cam to adjust the lower die plate, thereby adjusting the distance between the lower die plate and the discharge port. This avoids problems such as jamming and skewing when adjusting the lower die plate. At the same time, the limiting component positions and fixes the rotating rod, thereby allowing the cam to support the lower die plate, preventing the lower die plate from shaking due to the impact and lateral forces generated during plastic melt extrusion, which would affect the distance between the lower die plate and the discharge port, thus improving the extrusion quality.

Description

Technical Field

[0001] This utility model relates to the field of extrusion die technology, specifically a plastic sheet shaping extrusion die. Background Technology

[0002] The plastic sheet forming extrusion die is a core component of the plastic sheet extrusion molding production line. It is mainly used to cool and shape the molten plastic from the extruder into qualified sheet products according to the preset size and shape. First, the melt is evenly distributed through the die head flow channel to ensure consistent sheet thickness. Then, the flatness and dimensional accuracy of the sheet are precisely controlled by the forming device (such as vacuum adsorption and pressure rollers). Subsequently, the melt is rapidly cooled through the cooling system to solidify and form the product. At the same time, the forming sheet is stably conveyed by the traction mechanism to ensure continuous production.

[0003] A plastic sheet extrusion mold disclosed in patent publication number CN212097411U includes a mold groove and a mold shell, which are connected to an external material conveying mechanism through a guide pipe. Material is then supplied, filling the bottom of the mold groove and the forming mechanism. Over time, the material gradually forms a plate shape and is conveyed to the outside from the front of the mold groove via a conveying roller. If the thickness of the extruded product is to be controlled, the user can start a fixed motor through an external control mechanism. The fixed motor can drive the threaded rod to rotate, thereby causing the connecting plate to move upward, which in turn causes the mold shell to move upward, increasing the height of the forming groove between the mold groove and the mold shell, facilitating the subsequent extrusion of products of different thicknesses.

[0004] The above-mentioned device uses four sets of fixed motors to synchronously drive the threaded rods to move the mold housing, which can easily cause problems such as mold housing jamming and skewing. In addition, during extrusion, the mold housing is also subjected to the impact force and lateral force generated during the extrusion of plastic melt, which can cause unstable shaking and thus affect the extrusion quality. In order to address the above problems, a plastic sheet shaping extrusion mold is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a plastic sheet forming extrusion mold to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A plastic sheet forming extrusion mold includes a mold housing, a discharge port fixedly connected to one side of the mold housing, and a lower template disposed at the bottom of the discharge port. A cam is slidably disposed at the bottom of the lower template. The cam is fixedly connected to a rotating rod. The rotating rod is rotatably connected to both sides of the inner wall of the mold housing. A limiting component for positioning the rotation of the rotating rod is disposed on one side of the mold housing.

[0008] The limiting component includes a fixed block and several sets of limiting blocks. The fixed block is sleeved on the rotating rod, and the several sets of limiting blocks are fixedly connected to the rotating rod. A groove for engaging the limiting block is provided on one side of the fixed block, and a positioning block is engaged on one side of the limiting block. Several positioning grooves for sliding the positioning block are provided on the inner wall of the groove. A spring is connected to one side of the positioning block, and the end of the spring away from the positioning block is connected to one side of the inner wall of the positioning groove. A positioning component for fixing the rotation of the rotating rod is provided on one side of the mold housing.

[0009] One side of the mold housing is provided with a guide component for limiting the sliding of the fixed block.

[0010] In one alternative: the positioning component includes a rotating frame and a limiting bolt. The rotating frame is disposed on one side of the rotating rod, and the limiting bolt is threadedly connected to the rotating frame. A plurality of limiting holes for cooperating with the threaded connection of the limiting bolt are provided on one side of the mold housing.

[0011] In one alternative: the guide assembly includes inserts and slots, two sets of inserts are fixedly connected to a fixed block on one side near the mold housing, the slot is opened on one side of the mold housing, and the inserts are slidably connected in the slot.

[0012] In one alternative: a guide block is fixedly connected to one side of the rotating frame, and a guide groove is provided on one side of the rotating rod for sliding in conjunction with the guide block. Both the guide block and the guide groove have a T-shaped cross-section.

[0013] In one alternative: several sets of the limiting blocks and positioning blocks are evenly arranged in the circumferential direction of the central axis of the rotating rod, and one side of each limiting block and positioning block is set to be arc-shaped.

[0014] In one alternative: a handle is provided on one side of the rotating rod.

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

[0016] This invention incorporates a mold housing, a lower template, a cam, a rotating rod, a discharge port, and a limiting component. Rotating the rotating rod drives the cam to adjust the lower template, thereby adjusting the distance between the lower template and the discharge port. This avoids problems such as jamming and skewing during the adjustment of the lower template. Simultaneously, the limiting component positions and fixes the rotating rod, thus supporting the lower template with the cam. This prevents the lower template from shaking due to the impact and lateral forces generated during plastic melt extrusion, which would affect the distance between the lower template and the discharge port, thereby improving the extrusion quality.

[0017] This utility model, by setting a guide component, pulls the fixing block outward, causing the insert block to disengage from the slot. At the same time, the limiting block slides outward within the positioning block. Without the limiting of the positioning block, the rotating rod can drive the cam to rotate in the opposite direction, adjusting the distance between the lower template and the discharge port. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the structure where the rotating rod is located in this utility model.

[0020] Figure 3 This is a structural diagram of the location of the guide block in this utility model.

[0021] Figure 4 This is a schematic diagram of the structure where the limiting block is located in this utility model.

[0022] Figure 5 This is a structural diagram of the slot location in this utility model.

[0023] In the diagram: 11. Mold shell; 12. Lower template; 13. Cam; 14. Rotating rod; 15. Discharge port; 16. Fixing block; 17. Groove; 18. Limiting block; 19. Positioning block; 20. Positioning groove; 21. Spring; 22. Limiting hole; 23. Rotating frame; 24. Limiting bolt; 25. Guide block; 26. Guide groove; 27. Insert block; 28. Slot. Detailed Implementation

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5In this embodiment, a plastic sheet forming extrusion mold includes a mold housing 11, a discharge port 15 fixedly connected to one side of the mold housing 11, and a lower template 12 disposed at the bottom of the discharge port 15. A cam 13 is slidably disposed at the bottom of the lower template 12. The cam 13 is fixedly connected to a rotating rod 14. The rotating rod 14 is rotatably connected to both sides of the inner wall of the mold housing 11. A limiting component for positioning the rotation of the rotating rod 14 is disposed on one side of the mold housing 11.

[0027] The limiting assembly includes a fixing block 16 and several sets of limiting blocks 18. The fixing block 16 is sleeved on the rotating rod 14, and the several sets of limiting blocks 18 are fixedly connected to the rotating rod 14. A groove 17 is provided on one side of the fixing block 16 for engaging with the limiting blocks 18. A positioning block 19 is engaged on one side of each limiting block 18. Several positioning grooves 20 are provided on the inner wall of the groove 17 for sliding with the positioning blocks 19. A spring 21 is connected to one side of each positioning block 19, and the end of the spring 21 away from the positioning block 19 is connected to one side of the inner wall of the positioning groove 20. A positioning element is provided on one side of the housing 11 to fix the rotation of the rotating rod 14. Rotating the rotating rod 14 causes several sets of limiting blocks 18 to rotate. As the limiting blocks 18 move, they press on one side of the arc-shaped positioning block 19. The positioning block 19 slides in the positioning groove 20 under pressure and presses against the spring 21. When the limiting block 18 moves to a position without the positioning block 19, the positioning block 19 is no longer restricted by the limiting block 18. The spring force of the spring 21 pops the positioning block 19 out. The limiting block 18 can be positioned and locked during the adjustment process. The positioning element fixes the rotating rod 14.

[0028] A guide assembly for limiting the sliding of the fixing block 16 is provided on one side of the mold housing 11.

[0029] The positioning component includes a rotating frame 23 and a limiting bolt 24. The rotating frame 23 is disposed on one side of the rotating rod 14, and the limiting bolt 24 is threadedly connected to the rotating frame 23. A plurality of limiting holes 22 are provided on one side of the mold housing 11 for threaded connection with the limiting bolt 24. When adjusted to a suitable position, the limiting bolt 24 can be screwed into the corresponding limiting hole 22 to position the rotating rod 14 and the fixing block 16.

[0030] The guide assembly includes insert blocks 27 and slots 28. Two sets of insert blocks 27 are fixedly connected to the side of the fixing block 16 near the mold housing 11. The slots 28 are opened on one side of the mold housing 11. The insert blocks 27 are slidably connected in the slots 28. When the fixing block 16 is pulled outward, the insert blocks 27 are disengaged from the slots 28. At the same time, the positioning block 19 moves away from the limiting block 18 along with the fixing block 16. Without the positioning block 19 clamping and limiting the limiting block 18, the rotating rod 14 can drive the cam 13 to rotate in the opposite direction, adjusting the distance between the lower template 12 and the discharge port 15.

[0031] A guide block 25 is fixedly connected to one side of the rotating frame 23, and a guide groove 26 is provided on one side of the rotating rod 14 for sliding in conjunction with the guide block 25. The cross-sections of the guide block 25 and the guide groove 26 are both T-shaped. By setting the T-shaped guide block 25 and guide groove 26, it is convenient for the fixed block 16 to slide, thereby driving the rotating frame 23 to move, so that the sliding of the fixed block 16 is not restricted by the rotating frame 23. At the same time, the T-shape can limit and fix the rotating rod 14.

[0032] Several sets of limiting blocks 18 and positioning blocks 19 are evenly arranged in the circumferential direction of the central axis of the rotating rod 14. One side of each limiting block 18 and positioning block 19 is set as an arc shape. The arc shape on the side facilitates the squeezing of the positioning block 19 when the limiting block 18 rotates.

[0033] A handle is provided on one side of the rotating rod 14, which makes it easier for staff to rotate the rotating rod 14.

[0034] The working principle of this utility model is as follows: When in use, first install the mold housing 11 on the output end of the existing conveyor, rotate the bolt to unscrew the limiting bolt 24, rotate the rotating rod 14 to drive the rotating frame 23 to rotate. As the rotating rod 14 rotates, it also drives several sets of limiting blocks 18 to rotate. As the limiting blocks 18 move, they press one side of the arc-shaped positioning block 19. The positioning block 19 slides in the positioning groove 20 under pressure and presses the spring 21. When the limiting block 18 moves to a position without the positioning block 19, the positioning block 19 is no longer restricted by the limiting block 18. The spring force of the spring 21 pops the positioning block 19 out. The limiting block 18 can be positioned and locked during the adjustment process. At the same time, the rotating rod 14 drives the cam 13 to rotate and press the lower template 12, causing the lower template 12 to rotate. The lower template 12 slides along the preset trajectory, thereby reducing the distance between the lower template 12 and the discharge port 15 to accommodate plates of different thicknesses and improve practicality.

[0035] When adjusted to the appropriate position, the limiting bolt 24 can be screwed into the corresponding limiting hole 22 to position the rotating rod 14 and the fixing block 16. When it is necessary to extrude a thicker sheet, the limiting bolt 24 can be unscrewed, and the fixing block 16 can be pulled outward to disengage the insert 27 from the slot 28. At the same time, the positioning block 19 moves away from the limiting block 18 along with the fixing block 16. Without the positioning block 19 clamping and limiting the limiting block 18, the rotating rod 14 can drive the cam 13 to rotate in the opposite direction to adjust the distance between the lower template 12 and the discharge port 15. This can avoid the problems of jamming and skewing when adjusting the lower template 12, and at the same time facilitate the positioning and fixing of the rotating rod 14, so that the cam 13 supports the lower template 12 and prevents the lower template 12 from shaking due to the impact and lateral force generated during the extrusion of the plastic melt, thereby affecting the distance between the lower template 12 and the discharge port 15 and improving the extrusion quality.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A plastic sheet forming extrusion mold, comprising a mold housing (11), an outlet (15) fixedly connected to one side of the mold housing (11), and a lower template (12) disposed at the bottom of the outlet (15), characterized in that: The bottom of the lower template (12) is slidably provided with a cam (13), the cam (13) is fixedly connected to the rotating rod (14), the rotating rod (14) is rotatably connected to both sides of the inner wall of the mold housing (11), and a limiting component for positioning the rotation of the rotating rod (14) is provided on one side of the mold housing (11). The limiting component includes a fixed block (16) and several sets of limiting blocks (18). The fixed block (16) is sleeved on the rotating rod (14), and several sets of limiting blocks (18) are fixedly connected to the rotating rod (14). A groove (17) for engaging the limiting block (18) is provided on one side of the fixed block (16). A positioning block (19) is engaged on one side of the limiting block (18). Several positioning grooves (20) for sliding with the positioning block (19) are provided on the inner wall of the groove (17). A spring (21) is connected to one side of the positioning block (19). The end of the spring (21) away from the positioning block (19) is connected to one side of the inner wall of the positioning groove (20). A positioning component for fixing the rotation of the rotating rod (14) is provided on one side of the mold housing (11). One side of the mold housing (11) is provided with a guide assembly for limiting the sliding of the fixing block (16).

2. The plastic sheet forming extrusion mold according to claim 1, characterized in that: The positioning component includes a rotating frame (23) and a limiting bolt (24). The rotating frame (23) is located on one side of the rotating rod (14), and the limiting bolt (24) is threaded onto the rotating frame (23). A number of limiting holes (22) for threaded connection with the limiting bolt (24) are provided on one side of the mold housing (11).

3. The plastic sheet forming extrusion mold according to claim 1, characterized in that: The guide assembly includes a plug (27) and a slot (28). Two sets of plugs (27) are fixedly connected to the side of the fixing block (16) near the mold housing (11). The slot (28) is opened on one side of the mold housing (11). The plug (27) is slidably connected in the slot (28).

4. The plastic sheet forming extrusion mold according to claim 2, characterized in that: A guide block (25) is fixedly connected to one side of the rotating frame (23), and a guide groove (26) is provided on one side of the rotating rod (14) for sliding in cooperation with the guide block (25). The cross-sections of the guide block (25) and the guide groove (26) are both T-shaped.

5. The plastic sheet forming extrusion mold according to claim 1, characterized in that: Several sets of the limiting blocks (18) and positioning blocks (19) are evenly arranged in the circumferential direction of the central axis of the rotating rod (14), and one side of the limiting blocks (18) and positioning blocks (19) is set to be arc-shaped.

6. The plastic sheet forming extrusion mold according to claim 1, characterized in that: A handle is provided on one side of the rotating rod (14).

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