Counter production line and production process thereof

Abstract

The invention relates to the field of shoe accessories, in particular to a counter production line and a production process thereof. A counter production line comprises an extrusion molding device, a cooling device, a winding device and a rewinding device, and the winding speed of the winding device is adjustable. The extrusion molding device comprises an extruder and an extrusion die positioned at an output port of the extruder; the extrusion die is provided with adjusting assemblies for adjusting the width of the middle and the two sides of the extrusion opening correspondingly. The adjusting assembly reduces the width of the two sides of the extrusion opening, so that the extruded sheet is in the state that the two sides are thin and the middle is thick, and secondary cutting is not needed. And when the thickness of the middle or the two sides of the produced counter needs to be adjusted, the width of the middle or the two sides of the extrusion opening is adjusted through the adjusting assembly, so that the corresponding size is achieved. And when the width size of the counter needs to be adjusted, the rolling speed of the rolling device can be increased under the condition that the extrusion speed is not changed, so that a finished product reaches the required size in the stretching process after the sheet is extruded.

Description

Technical Field

[0001] This application relates to the field of shoe accessories, and in particular to a Hongbao (a type of shoe) production line and its production process. Background Technology

[0002] Backstop is a rigid lining material used inside the toe and heel uppers of athletic shoes, leather shoes, and other footwear to provide support and shape retention. High-quality backstops must meet two technical requirements simultaneously: 1. High-strength support: The middle section needs sufficient thickness and rigidity to provide structural support. 2. Good deformation capacity: The edges need to be thinner to allow for a flexible fit with the upper material, reducing discomfort when wearing the shoe.

[0003] The current mainstream production process for Hongbao (a type of plastic sheeting) is a three-step process: extrusion molding → cutting into sheets → trimming. Therefore, the process involves multiple pieces of equipment such as extruders, cutting machines, and trimming machines. Furthermore, materials need to be transferred and repositioned between different machines between each step, resulting in low efficiency. Summary of the Invention

[0004] To improve the production efficiency of high-quality Hong Kong-style dollies, this application provides a Hong Kong-style dollie production line and its production process.

[0005] This application provides a production line for Hong Kong-style pulleys, which adopts the following technical solution: A production line for Hong Kong-style pulleys includes an extrusion molding unit, a cooling unit, a winding unit, and a rewinding unit. The winding speed of the winding device is adjustable; The extrusion molding apparatus includes an extruder and an extrusion die located at the output port of the extruder; the extrusion die is provided with adjustment components that adjust the width of the middle and both sides of the extrusion port respectively.

[0006] By adopting the above technical solution, the width of both sides of the extrusion nozzle can be reduced by adjusting the components, so that the extruded sheet is thin at both sides and thick in the middle, eliminating the need for secondary cutting, reducing the number of processes, and increasing production efficiency. When the required thickness of the center of the Hongbao model changes while the thickness of the sides remains constant and the width remains constant, the components can be adjusted to make the thickness of the center of the die body correspondingly wider or narrower when extruding the raw material, while keeping the thickness of the sides constant, thus controlling the winding speed of the winding device to remain constant.

[0007] When the required production model of the Hongbao (a type of plastic pipe) has a constant thickness in the middle, changes in the thickness on both sides, and a constant width, the thickness in the middle of the die body remains constant while the thickness on both sides changes accordingly when the raw material is extruded. This controls the winding speed of the winding device to remain constant.

[0008] When the required thickness of the Hongbao (a type of sheet metal) remains constant in the middle and on both sides, while the width increases, the extrusion length of the die body will not change. By adjusting the components, the thickness of the middle and both sides will correspondingly narrow when the die body extrudes the raw material. Then, the winding speed of the winding device will be adjusted and reduced. The speed difference between the sheet extrusion speed and the winding speed will be small, so that the stretching and thinning of the sheet during the stretching and winding process will be smaller. In the end, the effect of the Hongbao remaining constant in the middle and on both sides, while the width increases will be achieved.

[0009] When the required thickness of the Hongbao (a type of sheet metal) remains constant in the middle and on both sides, while the width becomes narrower, the extrusion length of the die body will not change. By adjusting the components, the thickness of the middle and both sides will increase accordingly when the die body extrudes the raw material. Then, the winding speed of the winding device will be increased. The speed difference between the sheet extrusion speed and the winding speed is large, which makes the stretching and narrowing of the sheet during the stretching and winding process larger. The sheet that was just extruded and was thicker will become thinner quickly in this process, and the width will also decrease rapidly. Finally, the effect of the Hongbao being thicker in the middle, thicker on both sides, and narrower in width will be achieved.

[0010] Preferably, the extrusion die includes a die body and an extrusion channel disposed within the die body. The extrusion channel includes a feeding section and an extrusion section, wherein the diameter of the feeding section is larger than that of the extrusion section.

[0011] By adopting the above technical solution, the raw material extruded by the extruder first passes through the feeding section and then enters the discharge section.

[0012] Preferably, the inside of the discharge section has an inner groove formed on the side facing away from the outer groove. When viewed from the cross-section of the inner groove, the groove depth first increases and then decreases from top to bottom, and the radius of curvature gradually increases during the change.

[0013] By adopting the above technical solution, the design of the inner groove with the groove depth increasing and then decreasing from top to bottom, and the radius of curvature gradually increasing during the change, allows the raw material to fill the discharge section in the inner groove before being output outward. This ensures that even if the width of the discharge section's extrusion opening changes, the raw material can still fill the entire extrusion opening, preventing uneven extrusion of raw material and the generation of defective products.

[0014] Preferably, the outer side of the mold body is formed with an outer groove extending in the horizontal direction at the position opposite to the discharge section. When viewed from the cross-section of the outer groove, the outer groove includes two side walls and a bottom wall perpendicular to the outer surface of the mold body. The bottom wall includes an arc-shaped deformation section located on the side wall near the extrusion channel and a transition section connecting the arc-shaped deformation section and the other side wall. The highest point of the arc-shaped deformation section is higher than the height of the inner groove.

[0015] By adopting the above technical solution, the external groove structure design ensures that the main deformation location is concentrated in the arc-shaped deformation section during stress deformation. This allows for controllable overall adjustment size and deformation location when adjusting the width of the extrusion nozzle. Furthermore, for a fixed model of Hongbao (a type of adjustable headphone jack), only the corresponding adjustment position angle and winding speed parameters need to be recorded to quickly restore the production of that model.

[0016] Preferably, the adjustment assembly includes a mounting component fixed to the mounting platform by bolts, a positioning component located between the mounting component and the mounting platform, a limiting component located on the side of the mounting component facing the mounting platform, multiple extensions passing through the mounting platform, a connecting component corresponding to each extension and connected to the mold body below the outer groove, and an adjustment component threadedly connected to each extension after passing through the mounting component, the positioning component and the limiting component.

[0017] By adopting the above technical solution, the extension part that is threadedly engaged with the adjusting part is displaced and stretched by rotating the adjusting part. In this process, the connecting part is driven, which in turn causes the mold body to deform, so as to ultimately change the width of the extrusion opening.

[0018] Preferably, the mounting component has a mounting groove formed on the side facing the mounting table, the limiting component is located in the mounting groove, and the limiting component has multiple limiting grooves formed on the side facing the bottom of the mounting groove. The limiting grooves are evenly distributed along the width direction of the mold body, and each limiting groove has a through hole formed at the bottom of the limiting component. The positioning component also has multiple positioning holes evenly distributed along the width direction of the mold body, and the position of each positioning hole corresponds to the position of the through hole. The adjusting component includes a screw that mates with the internal thread hole, a limiting part connected to the screw and having a size larger than the through hole and smaller than or equal to the limiting hole, and an operating part located at the upper end.

[0019] By adopting the above technical solution, the limiting groove engages with the limiting part of the adjusting component, allowing the adjusting component to rotate only relative to itself and preventing direct axial movement. Therefore, during the rotation of the adjusting component, the extension threaded to the adjusting component will shift with the rotation of the thread, causing the mold body to deform and adjust the width of the extrusion opening.

[0020] Preferably, each of the extensions includes a positioning part located at one end and corresponding in shape and size to the positioning hole, and a connecting part located at the other end for connecting with the connector. The end of the positioning part is formed with an internal threaded hole. The middle part of the extension passes through the mounting platform so that the connecting part extends into the outer groove. The side of the connecting part facing out of the outer groove is formed with a snap-fit ​​groove. One end of the connector is formed with a snap-fit ​​block that mates with the snap-fit ​​groove. At the position where the snap-fit ​​block is formed, a bolt passes through the connector and the extension to connect the two.

[0021] By adopting the above technical solution, each adjusting component can drive the adjustment of the corresponding extension component and the connecting component connected to it, and finally realize the independent adjustment of each adjusting component. This allows the width of the extrusion nozzle at different positions along the length direction to be adjusted independently, so as to produce a turret with different thicknesses in the middle and on both sides.

[0022] Preferably, a plurality of force-applying grooves are evenly distributed along the width direction of the mold body on the outer side below the outer groove, and a force-applying block that cooperates with the force-applying grooves is formed at the other end of the connector.

[0023] By adopting the above technical solution, the connection can drive the deformation of the mold body through the cooperation of the force groove and the force block.

[0024] Secondly, this application provides a manufacturing process for Hong Kong-style hemp toys, employing the following technical solution: A process for producing Hong Kong-style pulleys using the aforementioned production line includes: S1. Weigh and mix the raw materials; Mix the raw materials according to the designed material ratio.

[0025] S2, Mixed material feeding; The mixture is weighed, fed, and transported to the extruder.

[0026] S3, extrusion of sheet semi-finished products; After the raw material is heated and melted, it is extruded through an extrusion die with a wide center and narrow sides to form a sheet semi-finished product.

[0027] S4, Sheet extrusion molding; After extrusion, the semi-finished sheet material passes through a cooling tank, where it is stretched and cooled to form a finished sheet material.

[0028] S5. Sheet winding; The winding device winds up the sheet, and the winding speed of the winding device is greater than the extrusion speed of the extruder, so that the sheet is stretched before entering the cooling tank and during the cooling and solidification process, so that the size of the stretched sheet meets the required size of the toy.

[0029] By adopting the above technical solution, when it is necessary to adjust the thickness of the middle or sides of the extruder, the width of the middle or sides of the extrusion nozzle can be adjusted by adjusting the components to achieve the corresponding dimensions. When it is necessary to adjust the width of the extruder, the winding speed of the winding device can be increased while keeping the extrusion speed constant, so that the finished product reaches the required size during the stretching process after the sheet is extruded. This achieves a production process that eliminates the need for secondary cutting of the sides of the extruder.

[0030] In summary, this application includes at least one of the following beneficial technical effects: 1. By adjusting the components, the width of the extrusion nozzle can be reduced, resulting in an extruded sheet that is thinner at the edges and thicker in the middle. This eliminates the need for secondary cutting, reduces processing steps, and increases production efficiency. Furthermore, when adjusting the thickness of the center or sides of the extrusion nozzle, the width of the center or sides can be adjusted using the components to achieve the desired dimensions. When adjusting the width of the extrusion nozzle, the winding speed of the winding device can be increased while maintaining the extrusion speed, allowing the sheet to stretch and reach the required dimensions during the final stretching process.

[0031] 2. The design of the inner groove with its depth increasing and decreasing from top to bottom, and the radius of curvature gradually increasing during the change, ensures that the raw material fills the discharge section in the inner groove before being output outward. This ensures that even if the width of the extrusion opening of the discharge section changes, the raw material can still fill the entire extrusion opening, preventing uneven extrusion and the occurrence of defective products.

[0032] 3. Each adjusting component can drive the adjustment of the corresponding extension component and the connecting component connected to it, so as to achieve independent adjustment of each adjusting component. This allows the width of the extrusion nozzle at different positions along the length direction to be adjusted independently, so as to produce a turret with different thicknesses in the middle and on both sides. Attached Figure Description

[0033] Figure 1 This is a flowchart of the production process of Hong Kong Treasure in Example 1; Figure 2 This is a schematic diagram of the extrusion die structure of the Hongbao production line in Example 2; Figure 3 This is a cross-sectional schematic diagram of the extrusion die in Example 2; Figure 4 This is a cross-sectional schematic diagram of the adjustment component in Embodiment 2.

[0034] Explanation of reference numerals in the attached drawings: 1. Mold body; 2. Extrusion channel; 3. Feeding section; 4. Discharge section; 5. External groove; 6. Internal groove; 7. Mounting platform; 8. Arc-shaped deformation section; 9. Transition section; 10. Force application groove; 11. Mounting component; 12. Positioning component; 13. Limiting component; 14. Extension component; 15. Connecting component; 16. Adjusting component; 17. Mounting groove; 18. Limiting groove; 19. Through hole; 20. Positioning hole; 21. Positioning part; 22. Connecting part; 23. Snap-fit ​​groove; 24. Snap-fit ​​block; 25. Force application block; 26. Outer cover. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0036] This application discloses a production line for Hong Kong-style pullovers and its production process. The terms "up," "down," "left," and "right" used in the embodiments are schematic representations of relative directions and are not limitations on the positional relationship.

[0037] Example 1: like Figure 1 As shown, the manufacturing process of Hong Kong-style hemp includes: S1. Weigh and mix the raw materials; Mix the raw materials according to the designed material ratio.

[0038] S2, Mixed material feeding; The mixture is weighed, fed, and transported to the extruder.

[0039] S3, extrusion of sheet semi-finished products; After the raw material is heated and melted, it is extruded through an extrusion die with a wide center and narrow sides to form a sheet semi-finished product.

[0040] S4, Sheet extrusion molding; After extrusion, the semi-finished sheet material passes through a cooling tank, where it is stretched and cooled to form a finished sheet material.

[0041] S5. Sheet winding; The winding device winds up the sheet, and the winding speed of the winding device is greater than the extrusion speed of the extruder, so that the sheet is stretched before entering the cooling tank and during the cooling and solidification process, so that the size of the stretched sheet meets the required size of the toy.

[0042] Example 2: The Hongbao production line includes an extrusion molding unit, a cooling unit, a winding unit, and a rewinding unit. The winding unit includes a winding roller and a motor that drives the winding roller to rotate; the motor speed is adjustable.

[0043] The extrusion molding apparatus includes an extruder and an extrusion die located at the outlet of the extruder, the extrusion die having an adjustment component.

[0044] like Figure 2 and Figure 3As shown, the extrusion die includes a die body 1 and an extrusion channel 2 disposed within the die body 1. The extrusion channel 2 includes a feed section 3 and an discharge section 4. The diameter of the feed section 3 is larger than that of the discharge section 4, and the feed section 3 and the discharge section 4 have a smooth transition. The outlet at the lower end of the discharge section 4 is the extrusion port. An external groove 5 extending horizontally is formed on the outer side of the die body 1, directly opposite the discharge section 4. An internal groove 6 is formed on the side of the discharge section 4 facing away from the external groove 5. Observing the cross-section of the internal groove 6, the groove depth first increases and then decreases from top to bottom, and the radius of curvature gradually increases during the change. An mounting platform 7 is formed on the outer side of the die body 1 above the external groove 5. Observing the cross-section of the external groove 5, the external groove 5 includes two side walls perpendicular to the outer surface of the die body 1 and a bottom wall. The bottom wall includes an arc-shaped deformation section 8 connecting the side wall near the extrusion channel 2 and a transition section 9 connecting the arc-shaped deformation section 8 and the other side wall. The highest point of the arc-shaped deformation section 8 is higher than the height of the internal groove 6. The structural design of the outer groove 5 ensures that the main deformation location is concentrated in the arc-shaped deformation section 8 when subjected to force. Multiple force-applying grooves 10 are evenly distributed along the width direction of the mold body 1 on the outer side below the outer groove 5.

[0045] like Figure 2 and Figure 4 As shown, the adjustment assembly includes a mounting member 11 fixed to the mounting platform 7 by bolts, a positioning member 12 located between the mounting member 11 and the mounting platform 7, a limiting member 13 located on the side of the mounting member 11 facing the mounting platform 7, multiple extensions 14 passing through the mounting platform 7, a connecting member 15 corresponding to each extension 14 and connected to the mold body 1 below the outer groove 5, an adjustment member 16 passing through the mounting member 11, the positioning member 12 and the limiting member 13 and threadedly connected to each extension 14, and an outer cover 26 protecting the mounting member 11, the extensions 14 and the connecting member 15.

[0046] like Figure 4 As shown, the mounting member 11 has a mounting groove 17 formed on the side facing the mounting platform 7. The limiting member 13 is located in the mounting groove 17, and multiple limiting grooves 18 (specifically seven in this embodiment) are formed on the side of the limiting member 13 facing the bottom of the mounting groove 17. The limiting grooves 18 are evenly distributed along the width direction of the mold body 1, and each limiting groove 18 has a through hole 19 formed at its bottom. Similarly, multiple positioning holes 20 are evenly distributed along the width direction of the mold body 1, and the position of each positioning hole 20 corresponds to the position of the through hole 19.

[0047] like Figure 4As shown, each extension 14 includes a positioning portion 21 located at one end and corresponding in shape and size to the positioning hole 20, and a connecting portion 22 located at the other end for connection with the connector 15. The end of the positioning portion 21 is formed with an internal threaded hole, and the middle part of the extension 14 passes through the mounting platform 7 so that the connecting portion 22 extends into the outer groove 5, and the side of the connecting portion 22 facing out of the outer groove 5 is formed with a snap-fit ​​groove 23.

[0048] like Figure 4 As shown, one end of the connector 15 is formed with a snap-fit ​​block 24 that mates with the snap-fit ​​groove 23, and bolts are used to connect the connector 15 and the extension 14 at the position where the snap-fit ​​block 24 is formed. The other end of the connector 15 is formed with a force-applying block 25 that mates with the force-applying groove 10, so that the connector 15 is driven to apply force, causing the mold body 1 to deform at the position below the outer groove 5, thereby changing the width of the corresponding position of the discharge section 4.

[0049] like Figure 4 As shown, the adjusting member 16 includes a screw that mates with the internal threaded hole, a limiting part connected to the screw and having a size larger than the through hole 19 and smaller than or equal to the limiting hole, and an operating part located at the upper end.

[0050] Specific usage process: When the thickness of the middle part of the required Hongbao model changes while the thickness on both sides remains constant and the width remains constant, multiple adjusting parts 16 located in the middle position in the width direction of the mold body 1 are rotated so that the thickness in the middle part of the mold body 1 becomes wider or narrower when extruding raw materials, while the thickness on both sides remains constant, and the winding speed of the winding device remains constant, so as to produce the corresponding model of Hongbao.

[0051] When the required model of the Hongbao (a type of jeweled toy) has a constant thickness in the middle, changes in thickness on both sides, and a constant width, multiple adjusting parts 16 located on both sides in the width direction of the mold body 1 are rotated so that the thickness in the middle of the mold body 1 remains constant when extruding raw materials, while the thickness on both sides changes accordingly, and the winding speed of the winding device remains constant, so as to produce the corresponding model of the Hongbao.

[0052] When the required thickness of the Hongbao (a type of sheet metal) remains constant in the middle and on both sides, while the width increases, the length of the extrusion port of the mold body 1 will not change. Therefore, by rotating the adjusting part 16 on the mold body 1, the thickness of the middle and both sides will correspondingly narrow when the mold body 1 extrudes the raw material. Then, the winding speed of the winding device is adjusted and reduced. The speed difference between the sheet extrusion speed and the winding speed is small, so that the stretching and thinning of the sheet during the stretching and winding process is small. Finally, the effect of the Hongbao having constant thickness in the middle, constant thickness on both sides, and increased width is achieved.

[0053] When the required thickness of the Hongbao (a type of sheet metal) remains constant in the middle and on both sides, while the width becomes narrower, the length of the extrusion port of the mold body 1 will not change. Therefore, by rotating the adjusting part 16 on the mold body 1, the thickness of the middle and both sides will increase accordingly when the mold body 1 extrudes the raw material. Then, the winding speed of the winding device is increased. The speed difference between the sheet extrusion speed and the winding speed is large, which makes the stretching and narrowing of the sheet during the stretching and winding process larger. The sheet that was just extruded is thicker and thinner quickly during this process, and the width also decreases rapidly. Finally, the effect of the Hongbao having constant thickness in the middle, constant thickness on both sides, and narrower width is achieved.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A production line for Hong Kong-style pullover pipes, comprising an extrusion molding device, a cooling device, a winding device, and a rewinding device, characterized in that, The winding speed of the winding device is adjustable; The extrusion molding apparatus includes an extruder and an extrusion die located at the output port of the extruder; the extrusion die is provided with adjustment components that adjust the width of the middle and both sides of the extrusion port respectively.

2. The production line for the Hong Kong-style pullover bag according to claim 1, characterized in that, The extrusion die includes a die body (1) and an extrusion channel (2) disposed in the die body (1). The extrusion channel (2) includes a feeding section (3) and a discharging section (4). The diameter of the feeding section (3) is larger than that of the discharging section (4).

3. The production line for the Hong Kong-style pullover according to claim 2, characterized in that, The discharge section (4) has an inner groove (6) formed on the side facing away from the outer groove (5). When viewed from the cross-section of the inner groove (6), the groove depth first increases and then decreases from top to bottom, and the radius of curvature gradually increases during the change.

4. The production line for the Hong Kong-style pullover according to claim 2, characterized in that, The outer side of the mold body (1) is formed with an outer groove (5) extending in the horizontal direction, which is directly opposite the discharge section (4). When viewed from the cross-section of the outer groove (5), the outer groove (5) includes two side walls and a bottom wall that are perpendicular to the outer surface of the mold body (1). The bottom wall includes an arc-shaped deformation section (8) that connects to the side wall near the extrusion channel (2) and a transition section (9) that connects the arc-shaped deformation section (8) and the other side wall. The highest point of the arc-shaped deformation section (8) is higher than the height of the inner groove (6).

5. The production line for the Hong Kong-style pullover according to claim 4, characterized in that, The adjustment assembly includes a mounting member (11) fixed to the mounting platform (7) by bolts, a positioning member (12) located between the mounting member (11) and the mounting platform (7), a limiting member (13) located on the side of the mounting member (11) facing the mounting platform (7), a plurality of extensions (14) passing through the mounting platform (7), a connecting member (15) corresponding to each extension (14) connected to the mold body (1) at a position below the outer groove (5), and an adjustment member (16) threadedly connected to each extension (14) after passing through the mounting member (11), the positioning member (12) and the limiting member (13).

6. The production line for the Hong Kong-style pullover according to claim 5, characterized in that, The mounting component (11) has a mounting groove (17) formed on the side facing the mounting platform (7). The limiting component (13) is located in the mounting groove (17), and multiple limiting grooves (18) are formed on the side of the limiting component (13) facing the bottom of the mounting groove (17). The limiting grooves (18) are evenly distributed along the width direction of the mold body (1), and each limiting groove (18) has a through hole (19) formed at the bottom of the limiting component (13). The positioning component (12) also has multiple positioning holes (20) evenly distributed along the width direction of the mold body (1), and the position of each positioning hole (20) corresponds to the position of the through hole (19). The adjusting component (16) includes a screw that mates with the internal thread hole, a limiting part connected to the screw and whose size is larger than the through hole (19) and smaller than or equal to the limiting hole, and an operating part located at the upper end.

7. The production line for the Hong Kong-style pullover according to claim 6, characterized in that, Each of the extensions (14) includes a positioning part (21) located at one end and corresponding in shape and size to the positioning hole (20), and a connecting part (22) located at the other end for connecting to the connector (15). The end of the positioning part (21) is formed with an internal threaded hole. The middle part of the extension (14) passes through the mounting platform (7) so that the connecting part (22) extends into the outer groove (5). The side of the connecting part (22) facing out of the outer groove (5) is formed with a snap-fit ​​groove (23). One end of the connector (15) is formed with a snap-fit ​​block (24) that mates with the snap-fit ​​groove (23). The connector (15) and the extension (14) are connected by bolts passing through the connector (15) and the extension (14) at the position where the snap-fit ​​block (24) is formed.

8. The production line for the Hong Kong-style pullover according to claim 7, characterized in that, Multiple force-applying grooves (10) are evenly distributed along the width direction of the mold body (1) on the outer side below the outer groove (5). The other end of the connector (15) is formed with a force-applying block (25) that cooperates with the force-applying groove (10).

9. A process for producing Hong Kong-style pulleys using the production line according to any one of claims 1-8, comprising: S1. Weigh and mix the raw materials; Mix the raw materials according to the designed material ratio. S2, Mixed material feeding; The mixture is weighed, fed, and transported to the extruder. S3, extrusion of sheet semi-finished products; After the raw material is heated and melted, it is extruded through an extrusion die with a wide center and narrow sides to form a sheet semi-finished product. S4, Sheet extrusion molding; After extrusion, the semi-finished sheet material passes through a cooling tank, where it is stretched and cooled to form a finished sheet material. S5. Sheet winding; The winding device winds up the sheet, and the winding speed of the winding device is greater than the extrusion speed of the extruder, so that the sheet is stretched before entering the cooling tank and during the cooling and solidification process, so that the size of the stretched sheet meets the required size of the toy.

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