Polytetrafluoroethylene production line hot air circulation setting device

Abstract

The application relates to the technical field of polytetrafluoroethylene production, in particular to a hot air circulating shaping device for a polytetrafluoroethylene production line. The device comprises a shaping box, an unwinding mechanism and a winding mechanism. One end of the shaping box is a feeding end, and the other end is a discharging end. The unwinding mechanism is arranged on one side of the shaping box outside the shaping box and close to the feeding end. The winding mechanism is arranged on one side of the shaping box outside the shaping box and close to the discharging end. A plurality of shaping rollers are arranged in the box body and are distributed in an upper-lower staggered mode. An electric heating pipe for heating a material belt is arranged in each shaping roller. A shearing assembly for shearing the material belt is arranged in the box body. The shearing assembly comprises a first shearing assembly and a second shearing assembly which are oppositely arranged in a horizontal direction. When the shaping box needs to be maintained, the material belt in the shaping box can be sheared, so that the material belt does not affect the maintenance of the shaping box, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of polytetrafluoroethylene (PTFE) processing, specifically to a hot air circulation shaping device for a PTFE production line. Background Technology

[0002] Polytetrafluoroethylene (PTFE) is a polymer that is compatible with a variety of lubricants. Its chemical resistance is far superior to any other sealing lip material. It requires heat setting during processing.

[0003] When heating and shaping PTFE strips, if the shaping effect is unsatisfactory or the shaping rollers malfunction, the rollers need to be repaired to restore normal operation. However, mixing the strips already shaped or not yet shaped with the strips in the shaping box at this time will affect the overall shaping effect. Furthermore, the strips in the shaping box make it inconvenient for maintenance personnel to repair the shaping rollers, reducing maintenance efficiency. Summary of the Invention

[0004] In order to prevent the material strip from affecting the maintenance process of the shaping box, this application provides a hot air circulation shaping device for a polytetrafluoroethylene production line.

[0005] The heat-setting equipment for fabric provided in this application adopts the following technical solution:

[0006] A hot air circulation shaping device for a polytetrafluoroethylene (PTFE) production line includes a shaping box, an unwinding mechanism, and a winding mechanism. One end of the shaping box is a feeding end, and the other end is a discharging end. The unwinding mechanism is located outside the shaping box on the side near the feeding end, and the winding mechanism is located outside the shaping box on the side near the discharging end.

[0007] The box is equipped with several shaping rollers that are staggered and spaced vertically, and each shaping roller is equipped with an electric heating tube for heating the material strip.

[0008] The box is equipped with a shearing assembly for cutting the material strip. The shearing assembly includes a first shearing component arranged in a horizontal direction. The first shearing component includes a first blade and a first driving member. One end of the first driving member is connected to the first blade, and the other end is connected to the top wall of the shaping box.

[0009] By adopting the above technical solution, the material strip moves forward along the arrangement direction of the shaping rollers. The shaping rollers can fully stretch the material strip, and the electric heating tubes heat and shape the material strip, improving the shaping effect. The first blade moves closer to the material strip under the action of the first driving component, and can cut the material strip. After being cut, the material strip is divided into two parts. One part is retracted by the winding mechanism, and the other part is retracted by the unwinding mechanism, so that the material strip in the shaping box is processed, which facilitates maintenance personnel to maintain the shaping rollers.

[0010] Optionally, the hot air circulation shaping device for the polytetrafluoroethylene production line further includes a second shearing assembly, which includes a second blade and a second driving component. One end of the second driving component is connected to the second blade, and the other end is connected to the bottom wall of the shaping box. The first shearing assembly and the second shearing assembly are arranged opposite to each other.

[0011] By adopting the above technical solution, the first blade and the second blade approach each other under the drive of the corresponding driving components and form a shearing space through which the feed belt passes. They continue to move towards each other, which can cut the feed belt and improve the shearing effect.

[0012] Optionally, the number of shearing components is two sets, which are respectively arranged in the shaping box on the side near the feeding end and the side near the discharging end.

[0013] By adopting the above technical solution, shearing components are installed near the infeed end and near the discharge end inside the shaping box. After shearing, the material strip being shaped can be separated from the unshaped material strip and the material strip that has been shaped. This allows for further recycling of the material strip being shaped and reduces waste of the fabric that has been shaped or has not yet started to be shaped.

[0014] Optionally, both the first shearing assembly and the second shearing assembly are connected to a lifting assembly. Each lifting assembly includes a cylinder and a lifting rod. The cylinder is connected to the top wall or bottom wall of the shaping box. One end of each lifting rod is connected to the bottom of the corresponding cylinder, and the other end is connected to the corresponding shearing assembly.

[0015] By adopting the above technical solution, the first shearing component can move downward under the drive of the corresponding lifting component, and the second shearing component can move upward under the drive of the corresponding lifting component. When the shaping box is operating normally, the first and second shearing components can retract to their respective upper and lower ends inside the shaping box under the drive of the corresponding lifting components, without affecting the shaping process of the material strip.

[0016] Optionally, both the first blade and the second blade are covered with protective sleeves, and the first blade and the second blade are slidably inserted into the corresponding protective sleeves.

[0017] By adopting the above technical solution, the protective sleeve can protect the blade and extend its service life; at the same time, it can prevent maintenance personnel from being cut by the blade when maintaining and protecting the shaping roller, thus improving the safety of the maintenance process.

[0018] Optionally, the hot air circulation shaping device for the polytetrafluoroethylene production line further includes a positioning component, which includes a first positioning roller disposed below the first shearing component and a second positioning roller disposed above the second shearing component, with the first positioning roller and the second positioning roller being arranged alternately at intervals.

[0019] By adopting the above technical solution, the first positioning roller and the second positioning roller can position the first shearing component and the second shearing component respectively, and the first shearing assembly and the second shearing assembly can approach each other and complete the shearing process, thereby improving the accuracy of the shearing position.

[0020] Optionally, a compression component is also provided between each shearing component and its corresponding lifting component;

[0021] Each set of extrusion components includes an extrusion plate and a spring. One side of the extrusion plate is connected to the corresponding lifting rod, and the other side is connected to the corresponding shearing component. One end of the spring is connected to the corresponding extrusion plate, and the other end is connected to the corresponding protective sleeve.

[0022] By adopting the above technical solution, the spring is in a compressed state, which can squeeze the corresponding protective sleeve, and then squeeze the first blade and the second blade inserted in the protective sleeve, so that the first blade and the second blade squeeze each other, which increases the shearing force and makes the material strip easier to cut.

[0023] Optionally, a guide rod is also provided between each of the extrusion plates and the corresponding protective sleeve, with one end of each guide rod connected to the corresponding protective sleeve and the other end passing through the corresponding extrusion plate.

[0024] By adopting the above technical solution, the guide rod prevents the protective sleeve from moving laterally relative to the extrusion plate, ensuring that the spring connecting the extrusion plate and the protective sleeve remains vertical and does not shift, thus maintaining its compressive force. This guarantees that the first and second blades receive sufficient compressive force and are tightly pressed together, improving shearing efficiency.

[0025] Optionally, a gripper cylinder is also provided in the middle of the shaping box, and a drive motor for driving the gripper cylinder to rotate is provided at the end of the gripper cylinder.

[0026] By adopting the above technical solution, the gripper cylinder can clamp the material strip in the middle part of the shaping box. At the same time, driven by the drive motor, the gripper cylinder rotates, so that the material strip in the middle part can be wound around the gripper cylinder, so as to facilitate the removal of the material strip for further recycling.

[0027] Optionally, the inner bottom wall of the shaping box near the feeding end and near the discharging end is provided with a sliding groove, and a guide roller is slidably arranged on the sliding groove.

[0028] By adopting the above technical solution, the strip near the feed and discharge ends of the shaping rollers will not fall onto the bottom wall of the shaping box after being sheared, but will instead rest on the guide rollers. When the strip is retracted by the winding or unwinding motor, the guide rollers can move within the chute, providing a support point for the strip and preventing it from falling onto the bottom wall and affecting its subsequent use.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. When the setting roller requires maintenance or protection, the strip is cut into two parts. One part is retracted by the winding mechanism, and the other part is retracted by the unwinding mechanism. This allows the strip in the setting box to be processed, making it convenient for maintenance personnel to maintain the setting roller.

[0031] 2. The first and second shearing components, which are positioned opposite each other, can form a shearing space through which the feed belt passes, thus improving the shearing effect.

[0032] 3. The two sets of shearing components can separate the material strip that is being shaped from the material strip that is not yet shaped, and the material strip that has already been shaped, so that the material strip that is being shaped can be further recycled and reused, and the waste of the fabric that has already been shaped or has not yet begun to be shaped can be reduced.

[0033] 4. The gripper cylinder can clamp the material strip in the middle part of the shaping box to facilitate the removal of the material strip for further recycling. Attached Figure Description

[0034] Figure 1 This is a three-dimensional schematic diagram of the hot air circulation setting machine for the polytetrafluoroethylene production line in the embodiments of this application.

[0035] Figure 2 This is a front view of the hot air circulating setting machine for the polytetrafluoroethylene production line in the embodiments of this application.

[0036] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0037] Explanation of reference numerals in the attached drawings: 1. Unwinding mechanism; 11. Unwinding roller; 12. Unwinding motor; 2. Shaping box; 21. Feed end; 22. Discharge end; 23. Circulating fan; 24. Air inlet; 25. Slide groove; 3. Rewinding mechanism; 31. Rewinding roller; 32. Rewinding motor; 4. Shaping roller; 5. Shearing assembly; 51. First shearing assembly; 511. First blade; 512. First drive component; 52. Second shearing assembly; 521. Second blade; 522. Second drive component; 53. Protective sleeve; 6. Lifting assembly; 61. Cylinder; 62. Lifting rod; 7. Extrusion assembly; 71. Extrusion plate; 711. Guide rod; 72. Spring; 8. Positioning assembly; 81. First positioning roller; 82. Second positioning roller; 9. Guide roller; 10. Gripper cylinder. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0039] A hot air circulation shaping device for a polytetrafluoroethylene production line, reference Figure 1 The system includes an unwinding mechanism 1, a shaping box 2, and a winding mechanism 3. The shaping box 2 contains several shaping rollers 4, a shearing assembly 5, and a lifting assembly 6. One end of the shaping box 2 is the feed end 21, and the other end is the discharge end 22. The shearing assembly 5 is located inside the shaping box 2 near the feed end 21 and near the discharge end 22, and is used to cut the material strip. The shearing assembly 5 is connected to the top or bottom wall of the shaping box 2 via the lifting assembly 6.

[0040] refer to Figure 1 The unwinding mechanism 1 is located outside the shaping box 2, near the feed end 21 of the shaping box 2. The unwinding mechanism 1 includes an unwinding roller 11 and an unwinding motor 12 located at the end of the unwinding roller 11. The unwinding motor 12 can drive the unwinding roller 11 to rotate in the opposite direction to the feeding direction of the material strip. The winding mechanism 3 is located outside the shaping box 2, near the discharge end 22. The winding mechanism 3 includes a winding roller 31 and a winding motor 32 that can drive the winding roller to rotate, and is used to provide traction force to advance the material strip from the feed end 21 to the discharge end 22.

[0041] refer to Figure 1 and Figure 2Several shaping rollers 4 are arranged alternately up and down along the feed end 21 to the discharge end 22 of the shaping box 2. The number of shaping rollers 4 can be reasonably allocated according to actual needs. In this embodiment, there are 6 shaping rollers 4. The rotation direction of the shaping rollers 4 is the same as the forward direction of the material strip. Each shaping roller 4 is also equipped with an electric heating tube for heating the material strip. A circulating fan 23 is installed above the top wall of the shaping box 2. Several evenly spaced air inlets 24 are opened on the bottom wall of the shaping box 2 to draw out the hot air from the shaping box 2, circulate it for heating, and then transport it to the oven through the circulating fan 23.

[0042] refer to Figure 1 and Figure 2 The shaping box 2 is also equipped with a gripper cylinder 10 in the middle. The gripper cylinder 10 is located on both sides of the material strip. The end of the gripper cylinder 10 is equipped with a drive motor to drive the gripper cylinder 10 to rotate, so that the material strip can be wound on the clamp of the gripper cylinder 10.

[0043] refer to Figure 1 and Figure 2 The shaping box 2 has two parallel chutes 25 near the feed end 21 and near the discharge end 22, which are opened along the feeding direction of the material strip. A guide roller 9 is slidably mounted on the chutes 25. The guide roller 9 can move within the chutes 25. When the material strip is cut, a part of the material strip near the feed end 21 can be placed on the guide roller 9 and move along the feed end 21, and a part of the material strip near the discharge end 22 can be placed on the guide roller 9 and move along the discharge end 22.

[0044] refer to Figure 2 and Figure 3 The lifting assembly 6 includes a cylinder 61 and a lifting rod 62. The cylinder 61 is fixed to the top or bottom wall of the shaping box 2. One end of the lifting rod 62 is connected to the corresponding cylinder 61, and the other end is connected to the extrusion assembly 7. The extrusion assembly 7 includes an extrusion plate 71 and a spring 72 in a compressed state. The end of the lifting rod 62 away from the cylinder 61 is connected to one side of the extrusion plate 71, and the spring 72 is disposed between the extrusion plate 71 and the shearing assembly 5.

[0045] refer to Figure 3 The shearing assembly 5 includes a first shearing assembly 51 and a second shearing assembly 52. ​​The first shearing assembly 51 is connected to the inner top wall of the shaping box 2 via a corresponding lifting assembly 6, and the second shearing assembly 52 is connected to the inner bottom wall of the shaping box 2 via a corresponding lifting assembly 6. The first shearing assembly 51 and the second shearing assembly 52 are arranged horizontally relative to each other.

[0046] The first shearing assembly 51 includes a first blade 511 and a first drive member 512, and the second shearing assembly 52 includes a second blade 521 and a second drive member 522. The first drive member 512 is connected to one end of the first blade 511, and the second drive member 522 is connected to one end of the second blade 521. Both the first drive member 512 and the second drive member 522 are fixedly connected to one end of the corresponding extrusion plate 71.

[0047] In this embodiment, both the first driving component 512 and the second driving component 522 are cylinders 61. The first blade 511 and the second blade 521 are both covered with protective sleeves 53, and the first blade 511 and the second blade 521 are slidably inserted into the second protective sleeves 53.

[0048] refer to Figure 3 One end of the spring 72 is connected to the corresponding extrusion plate 71, and the other end is connected to the corresponding protective sleeve 53. The spring 72 between the extrusion plate 71 and the first shearing assembly 51 can apply a downward force to the first shearing assembly 51; correspondingly, the spring 72 between the extrusion plate 71 and the second shearing assembly 52 can also apply an upward force to the second shearing assembly 52. ​​Under the action of these two forces, the first shearing assembly 51 and the second shearing assembly 52 move closer to each other and compress, thereby continuing to complete the subsequent shearing process.

[0049] refer to Figure 3 A guide rod 711 is provided between the extrusion plate 71 and the protective sleeve 53. One end of each guide rod 711 is connected to the corresponding protective sleeve 53, and the other end passes through the corresponding extrusion plate 71 to control the protective sleeve 53 from moving laterally.

[0050] refer to Figure 3 A hot air circulation shaping device for a polytetrafluoroethylene (PTFE) production line further includes a positioning component 8. The positioning component 8 includes a first positioning roller 81 and a second positioning roller 82, which are spaced apart on both sides of the material belt. The first positioning roller 81 is positioned below the first shearing component 51 and is used to limit the first shearing component 51; the second positioning roller 82 is positioned above the second shearing component 52 and is used to limit the second shearing component 52.

[0051] The specific implementation principle of this embodiment is as follows: When the shaping box 2 needs maintenance and the material strip needs to be cut, the corresponding cylinder 61 is activated. The first shearing component 51 moves downward under the drive of the corresponding lifting component 6, and the second shearing component 52 moves upward under the drive of the corresponding lifting component 6. When the first shearing component 51 descends to just abut against the first positioning roller 81, and the second shearing component 52 rises to just abut against the second positioning roller 82, the first driving component 512 and the second driving component 522 are activated, so that the first blade 511 and the second blade 521 approach each other. Under the action of the corresponding extrusion component 7, the first blade 511 and the second blade 521 extrude against each other and move relative to each other, thus completing the shearing.

[0052] After both the shearing assembly 5 located at the feed end 21 and the shearing assembly 5 located at the discharge end 22 of the shaping box 2 have completed shearing, the strip is divided into three parts. The strips at both ends of the shaping box 2 are retracted along the guide rollers 9 by the corresponding unwinding mechanism 1 and winding mechanism 3. The strip in the middle part of the shaping box 2 is clamped by the jaws of the gripper cylinder 10 and wound around the jaws of the gripper cylinder 10 under the drive of the drive motor, which can be further recycled.

[0053] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hot air circulation shaping device for a polytetrafluoroethylene production line, comprising an unwinding mechanism (1), a shaping box (2) and a winding mechanism (3), wherein one end of the shaping box (2) is a feeding end (21) and the other end is a discharging end (22), the unwinding mechanism (1) is disposed outside the shaping box (2) on the side near the feeding end (21), and the winding mechanism (3) is disposed outside the shaping box (2) on the side near the discharging end (22); The shaping box (2) is provided with a plurality of shaping rollers (4) arranged alternately at intervals, and each shaping roller (4) is equipped with an electric heating tube for heating the material strip; characterized in that: The shaping box (2) is provided with a shearing assembly (5) for cutting the material strip. The shearing assembly (5) includes a first shearing assembly (51) and a second shearing assembly (52). The first shearing component (51) is connected to the top wall inside the shaping box, and the second shearing component (52) is connected to the bottom wall inside the shaping box. The first shearing component (51) and the second shearing component (52) are arranged opposite to each other. The first shearing assembly (51) includes a first blade (511) and a first drive member (512). One end of the first drive member (512) is connected to the first blade (511), and the other end is connected to the inner top wall of the shaping box (2). The second shearing assembly (52) includes a second blade (521) and a second drive member (522). One end of the second drive member (522) is connected to the second blade (521), and the other end is connected to the bottom wall of the shaping box (2). The shearing components (5) are in two sets and are respectively located in the shaping box (2) on the side near the feed end (21) and the side near the discharge end (22). The shaping box (2) is also provided with a rotatable gripper cylinder (10) in the middle. The gripper cylinder (10) is used to grip the material strip in the middle part of the shaping box (2). The end of the gripper cylinder (10) is provided with a drive motor, which is used to drive the gripper cylinder (10) to rotate. The shaping box (2) has grooves (25) on its inner bottom wall near the feed end (21) and near the discharge end (22). A guide roller (9) is slidably arranged in the groove (25). When the strip is cut by the two sets of shearing components (5) and retracted under the drive of the unwinding mechanism (1) and the winding mechanism (3), the guide roller (9) can move in the groove (25) to provide a support point for the strip.

2. The hot air circulation and shaping device for a polytetrafluoroethylene production line according to claim 1, characterized in that: Both the first shearing assembly (51) and the second shearing assembly (52) are connected to a lifting assembly (6), and each lifting assembly (6) includes a cylinder (61) and a lifting rod (62). The cylinder (61) is connected to the inner wall of the shaping box (2). One end of each lifting rod (62) is connected to the bottom of the corresponding cylinder (61), and the other end is connected to the corresponding first shearing assembly (51) and the corresponding second shearing assembly (52).

3. The hot air circulation and shaping device for a polytetrafluoroethylene production line according to claim 1, characterized in that: The hot air circulation shaping device for the polytetrafluoroethylene production line also includes a positioning component (8); The positioning component (8) includes a first positioning roller (81) disposed below the first shearing component (51) and a second positioning roller (82) disposed above the second shearing component (52), with the first positioning roller (81) and the second positioning roller (82) being arranged alternately at intervals.

4. The hot air circulation and shaping device for a polytetrafluoroethylene production line according to claim 2, characterized in that, Both the first blade (511) and the second blade (521) are slidably fitted with protective sleeves (53).

5. The hot air circulation and setting device for a polytetrafluoroethylene production line according to claim 4, characterized in that: A set of extrusion components (7) is provided on one side of the first blade (511) and one side of the second blade (521); Each of the extrusion assemblies (7) includes an extrusion plate (71) and a spring (72). One side of the extrusion plate (71) is connected to the corresponding lifting rod (62), and the other side is connected to the corresponding shearing assembly (5). One end of the spring (72) is connected to the corresponding extrusion plate (71), and the other end is connected to the corresponding protective sleeve (53).

6. The hot air circulation and shaping device for a polytetrafluoroethylene production line according to claim 5, characterized in that: A guide rod (711) is also provided between each of the extrusion plates (71) and the corresponding protective sleeve (53).

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