A polytetrafluoroethylene profile rolling equipment

Abstract

This utility model relates to the field of rolling equipment technology, and discloses a polytetrafluoroethylene (PTFE) profile rolling equipment, including a calender body, a cooling device and several pressure rollers within the calender body, the cooling device including several cooling inlets, the central axis of each cooling inlet being perpendicular to the rotation axis of the pressure rollers, and a support roller being provided below each cooling inlet, the support roller being rotatably connected to the calender body. This technical solution solves the problem in the prior art where the cooling air inlets directly face the profile, causing the airflow to directly act on the profile, easily leading to localized dents and affecting the profile quality.

Description

Technical Field

[0001] This utility model relates to the field of rolling equipment technology, and in particular to a rolling equipment for polytetrafluoroethylene profiles. Background Technology

[0002] Polytetrafluoroethylene (PTFE, commonly known as "Teflon") profile rolling usually refers to a special plastic processing technology used to mechanically roll PTFE billets into profiles with specific cross-sectional shapes (such as rods, plates, tubes, films, or complex cross-sections).

[0003] Among them, thin-film polytetrafluoroethylene (PTFE) profiles are usually processed by calendering. In order to prevent the rolled-up thin-film profiles from sticking together, existing PTFE profile calendering machines cool the profiles during processing. The common cooling method is air cooling, and in order to pursue cooling efficiency, the cooling air vents are usually directly facing the profiles.

[0004] However, during the cooling process, it was discovered that the profiles were prone to quality problems such as localized dents due to the influence of the cooling wind. Utility Model Content

[0005] The main purpose of this invention is to provide a polytetrafluoroethylene (PTFE) profile rolling equipment, which aims to solve the problem in the prior art where the cooling air vent faces the profile directly, causing the air force to act directly on the profile, which easily leads to local dents in the profile and affects the quality of the profile.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A polytetrafluoroethylene (PTFE) profile rolling equipment includes a calender body, a cooling device and several pressure rollers in the calender body, the cooling device including several cooling ports, the central axis of each cooling port being perpendicular to the rotation axis of the pressure rollers, and a support roller being provided below each cooling port, the support roller being rotatably connected to the calender body.

[0008] Furthermore, several auxiliary rollers are provided between the support roller and the cooling port. Each of the auxiliary rollers is rotatably connected to the calender body and is symmetrically and evenly distributed around the support roller.

[0009] Furthermore, each of the auxiliary rollers is provided with a plurality of air dispersing grooves, and each of the air dispersing grooves is arranged sequentially along a linear direction.

[0010] Furthermore, each of the auxiliary rollers includes several eccentric shafts and several connecting shafts, with the eccentric shafts and connecting shafts spaced apart. The radial surface of each eccentric shaft is tangent to the radial surface of the connecting shaft, and the two ends of each air diffuser groove are respectively flush with the two ends of each eccentric shaft.

[0011] Furthermore, the eccentric shafts of adjacent auxiliary rollers are misaligned.

[0012] Furthermore, each of the auxiliary rollers has its eccentric shafts arranged in a circular pattern around the central axis of the connecting shaft.

[0013] Furthermore, a linkage belt for linking the two is provided between adjacent auxiliary rollers.

[0014] Furthermore, the calender body is equipped with a lifting structure for controlling the distance between each auxiliary roller and the support roller.

[0015] Furthermore, the lifting structure includes several supporting rotating blocks and a telescopic shaft for driving the supporting rotating blocks to lift. Each supporting rotating block is provided with a rotating hole for each auxiliary roller to pass through it.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] This utility model provides support for the polytetrafluoroethylene film by setting a support roller below the forward path of the polytetrafluoroethylene film and below the air outlet of the cooling device. This avoids the film from being dented or having its quality affected by the airflow from the cooling device when it passes through the cooling device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of Example 1 or Example 2;

[0020] Figure 2 for Figure 1 A sectional view;

[0021] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the lifting structure in Example 1 or Example 2;

[0023] Figure 5 This is a schematic diagram of the supporting rotating block in Example 1 or Example 2;

[0024] Figure 6 This is a schematic diagram of the auxiliary roller structure in Example 1;

[0025] Figure 7 This is a schematic diagram of the auxiliary roller in Example 2.

[0026] Explanation of icon numbers:

[0027] 1. Calender body; 2. Cooling device; 21. Cooling port; 3. Pressure roller; 4. Support roller; 5. Auxiliary roller; 51. Air vent; 52. Eccentric shaft; 53. Connecting shaft; 6. Linkage belt; 7. Lifting structure; 71. Support block; 72. Telescopic shaft; 73. Rotating hole.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] Example 1

[0031] like Figures 1-2 As shown in the figure, this embodiment proposes a polytetrafluoroethylene (PTFE) profile rolling equipment, which mainly includes a calender body 1. The calender body 1 is equipped with a cooling device 2 and several pressure rollers 3. Each pressure roller 3 is rotatably connected to the calender body 1 and is located on the forward path of the PTFE profile (film). That is, the calendering (rolling) of the PTFE profile is realized by the contact between each pressure roller 3 and the PTFE profile.

[0032] The cooling device 2 mainly includes a cooling fan, an air supply duct, and several cooling ports 21. The air supply duct is connected to the air outlet of the cooling fan and is fixedly installed inside the calender body 1. Each cooling port 21 is opened on the air supply duct, so that the cold air in the air supply duct can enter the calender body 1 through each cooling port 21 to cool the polytetrafluoroethylene profile.

[0033] The central axis of each cooling port 21 is perpendicular to the rotation axis of the pressure roller 3, ensuring that the cold air generated by the operation of the cooling device 2 can be directly blown onto the polytetrafluoroethylene profile, thus ensuring the cooling efficiency of the polytetrafluoroethylene profile; each cooling port 21 is arranged in a linear direction on the air supply pipe to ensure uniform air output of the cooling device 2, thereby achieving uniform cooling of the polytetrafluoroethylene profile.

[0034] Each cooling port 21 is provided with a support roller 4 below it. The support roller 4 is also located on the forward path of the polytetrafluoroethylene profile. In this way, when the polytetrafluoroethylene profile passes under each cooling port 21, the support roller 4 provides support for it, thereby avoiding the film from being dented or having its quality affected by the wind force of the cooling device 2 when it passes through the cooling device 2.

[0035] The support roller 4 is rotatably connected to the calender body 1, so that when the support roller 4 comes into contact with the polytetrafluoroethylene profile, it can rotate due to the friction force brought by the polytetrafluoroethylene profile, thereby converting the sliding friction between the two into rolling friction and effectively reducing the friction force between them.

[0036] like Figures 2-3 As shown, in this embodiment, several auxiliary rollers 5 are provided between the support roller 4 and the cooling port 21. Each auxiliary roller 5 is rotatably connected to the calender body 1 and is symmetrically and evenly distributed with the support roller 4 as the center. That is, the rotation axes of the support roller 4 and each auxiliary roller 5 form an isosceles triangle structure. The cooling air generated by the operation of the cooling device 2 contacts the polytetrafluoroethylene profile through the gap between adjacent auxiliary rollers 5. This allows the polytetrafluoroethylene profile to pass through a triangular frame structure when it passes through the cooling device 2, further reducing the possibility of the polytetrafluoroethylene profile swaying up and down due to the wind force.

[0037] Each auxiliary roller 5 is provided with several air dispersing grooves 51. The presence of each air dispersing groove 51 allows the cooling air to disperse along the surface of the polytetrafluoroethylene profile and out of the gap between adjacent auxiliary rollers 5 after contacting the polytetrafluoroethylene profile. This avoids residual airflow between adjacent auxiliary rollers 5, which would collide with the subsequent cooling air and generate turbulence. This optimizes the cooling airflow direction acting on the surface of the polytetrafluoroethylene profile, thereby ensuring the cooling effect of the cooling device 2.

[0038] Each air diffuser 51 is arranged sequentially along a linear direction to ensure uniform airflow dispersion.

[0039] like Figure 3 , Figure 6 As shown, each auxiliary roller 5 in this embodiment includes several eccentric shafts 52 and several connecting shafts 53. The eccentric shafts 52 and connecting shafts 53 are spaced apart. The two ends of each air diffuser 51 are flush with the two ends of each eccentric shaft 52. That is, through the mutual cooperation of the eccentric shafts 52 and connecting shafts 53, the air diffuser 51 structure appears on the overall surface of the auxiliary roller 5. The eccentric shafts 52 and connecting shafts 53 are integrally formed to ensure the structural stability of the overall structure of the auxiliary roller 5.

[0040] The radial surfaces of each eccentric shaft 52 are tangent to the radial surfaces of the connecting shaft 53. After the auxiliary roller 5 rotates at a certain angle, it can contact the polytetrafluoroethylene profile located at the air vent 51, effectively preventing the polytetrafluoroethylene profile from only contacting the connecting shaft 53, which would result in raised strips or indentations on the surface of the polytetrafluoroethylene profile.

[0041] Meanwhile, the eccentric shafts 52 of adjacent auxiliary rollers 5 are staggered. That is, when the eccentric shaft 52 of one of the auxiliary rollers 5 is in contact with the polytetrafluoroethylene profile, the eccentric shaft 52 of the adjacent auxiliary roller 5 is not in contact with the polytetrafluoroethylene profile. This not only avoids the airflow path between adjacent auxiliary rollers 5 being blocked, but also ensures that there is always an auxiliary roller 5 in contact with the polytetrafluoroethylene profile with a complete linear contact surface through the cooperation of each auxiliary roller 5. This further reduces the probability of ridges or indentations appearing on the surface of the polytetrafluoroethylene profile, and fully improves the production quality of this embodiment.

[0042] like Figure 4 As shown, each adjacent auxiliary roller 5 is provided with a linkage belt 6 for linking the two. Each auxiliary roller 5 is provided with a linkage wheel for cooperating with the linkage belt 6. Each linkage wheel is preferably connected to the auxiliary roller 5 by welding to ensure the connection strength between the two. The linkage belt 6 is preferably a synchronous belt to ensure the consistency of rotation of adjacent auxiliary rollers 5, thereby improving the cooperation effect between adjacent auxiliary rollers 5.

[0043] like Figures 4-5 As shown, the calender body 1 is provided with a lifting structure 7 for controlling the distance between each auxiliary roller 5 and the support roller 4. With the help of the lifting structure 7, the distance between the support roller 4 and each auxiliary roller 5 is adjustable, so that this embodiment can be adapted to PTFE profiles of various thicknesses, effectively expanding the scope of application of this embodiment and improving the flexibility of use of this embodiment.

[0044] Specifically, the lifting structure 7 includes several supporting rotating blocks 71 and a telescopic shaft 72 for driving the supporting rotating blocks 71 to lift. Each supporting rotating block 71 is provided with a rotating hole 73 for each auxiliary roller 5 to pass through it. The supporting rotating block 71 is located between the linkage wheel and the connecting shaft 53, and the diameters of the connecting shaft 53 and the linkage wheel are both larger than the diameter of the rotating hole 73. In this way, when the supporting rotating blocks 71 and the telescopic shaft 72 are fixed to each other, the auxiliary roller 5 can be constrained by the cooperation between the connecting shaft 53 and the linkage wheel, so as to prevent the auxiliary roller 5 from moving in the expected direction during the lifting process.

[0045] Preferably, the telescopic shaft 72 is telescopically extended by a hydraulic cylinder. In this embodiment, the telescopic shaft 72 is preferably the piston shaft of a hydraulic cylinder to ensure that the telescopic shaft 72 has sufficient force to push each auxiliary roller 5 to rise and fall. The specific structure of the hydraulic cylinder supply structure should be determined according to the actual hydraulic cylinder model selected, and will not be described in detail in this embodiment.

[0046] Preferably, a connecting plate is provided between adjacent support rotating blocks 71, and the telescopic shaft 72 is fixedly connected to the connecting plate. All adjacent support rotating blocks 71 are fixedly connected to the connecting plate, so that the rotation of each support rotating block 71 can be controlled by one telescopic shaft 72, which effectively reduces the demand for telescopic shaft 72 in this embodiment and reduces the operating cost of this embodiment.

[0047] Preferably, lifting structures 7 should be provided on both sides of the calender body 1 (auxiliary roller 5) to ensure the balance of the auxiliary roller 5 during and after lifting.

[0048] Example 2

[0049] Based on Example 1, such as Figure 7 As shown, in this embodiment, each eccentric shaft 52 of each auxiliary roller 5 is circumferentially distributed around the central axis of the connecting shaft, thereby ensuring that no matter how much the auxiliary roller 5 rotates, there is always an eccentric shaft 52 (single or multiple) located on the auxiliary roller 5 that can contact the polytetrafluoroethylene profile, thus improving the contact stability between a single auxiliary roller 5 and the polytetrafluoroethylene profile.

[0050] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0051] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A polytetrafluoroethylene (PTFE) profile rolling equipment, comprising a calender body (1), wherein the calender body (1) is provided with a cooling device (2) and a plurality of pressure rollers (3), the cooling device (2) comprising a plurality of cooling ports (21), wherein the central axis of each cooling port (21) is perpendicular to the rotation axis of the pressure rollers (3), characterized in that, Each of the cooling ports (21) is provided with a support roller (4) below it, and the support roller (4) is rotatably connected to the calender body (1).

2. The polytetrafluoroethylene profile rolling apparatus according to claim 1, characterized by, Several auxiliary rollers (5) are provided between the support roller (4) and the cooling port (21). Each of the auxiliary rollers (5) is rotatably connected to the calender body (1) and is symmetrically and evenly distributed with the support roller (4) as the center.

3. The polytetrafluoroethylene profile rolling apparatus according to claim 2, characterized by, Each of the auxiliary rollers (5) is provided with a plurality of air dispersing grooves (51), and each of the air dispersing grooves (51) is arranged sequentially along a linear direction.

4. The polytetrafluoroethylene profile rolling apparatus according to claim 3, characterized by Each of the auxiliary rollers (5) includes several eccentric shafts (52) and several connecting shafts (53). The eccentric shafts (52) and connecting shafts (53) are spaced apart. The radial surface of each eccentric shaft (52) is tangent to the radial surface of the connecting shaft (53). The two ends of each air diffuser groove (51) are respectively flush with the two ends of each eccentric shaft (52).

5. The polytetrafluoroethylene profile rolling apparatus according to claim 4, characterized by, The eccentric shafts (52) of adjacent auxiliary rollers (5) are misaligned.

6. The polytetrafluoroethylene profile rolling apparatus according to claim 4 or 5, characterized by, Each of the auxiliary rollers (5) has an eccentric shaft (52) that is circumferentially distributed around the central axis of the connecting shaft.

7. The polytetrafluoroethylene profile rolling equipment according to claim 5, characterized in that, Each of the adjacent auxiliary rollers (5) is provided with a linkage belt (6) for linking the two.

8. The polytetrafluoroethylene profile rolling apparatus according to any one of claims 2 to 4, characterized by The calender body (1) is provided with a lifting structure (7) for controlling the distance between each auxiliary roller (5) and the support roller (4).

9. The polytetrafluoroethylene profile rolling apparatus according to claim 8, characterized by The lifting structure (7) includes several support rotating blocks (71) and a telescopic shaft (72) for driving the support rotating blocks (71) to lift. Each support rotating block (71) is provided with a rotating hole (73) for each auxiliary roller (5) to pass through it.

Images