Two-roll calender rewinding and unwinding mechanism for calendering polytetrafluoroethylene composite materials

Abstract

The present invention relates to a winding and unwinding mechanism for calendering polytetrafluoroethylene composite materials, wherein the rolled raw materials are passed through a first unwinding roller, an unwinding deviation correction device, a second unwinding roller, an unwinding traction device, and enter a calender through an unwinding shaft on the same plane; after being calendered by a two-roll calender, they are wound through a winding and drawing device, a first winding roller, a trimming device, a winding and deviation correction device, a second winding roller, and a winding shaft. The technical effect is that the raw materials on both sides of the calender are horizontally fed in and out through tension control on both sides of the winding and unwinding and the height level of the inlet and outlet ends of the two-roll calender, and the bottom roller of the traction device is equipped with a spring device, which solves the problem of raw material accumulation at the inlet and outlet ends of the two-roll calender, and achieves the final calendering effect. The produced coils have good thickness uniformity and are free of wrinkles.

Description

Technical Field

[0001] The invention relates to a two-roll calender for calendering a polytetrafluoroethylene composite material, in particular to a winding and unwinding mechanism of the two-roll calender for calendering a polytetrafluoroethylene composite material. Background Art

[0002] The rewinding and unwinding mechanism is based on the use of accessory devices of coating machines, calenders, cable equipment, etc., and its main function is to place and recycle raw materials. The calender is composed of two or more rollers, arranged in a certain form, which can be divided into cold pressing and hot pressing. Cold pressing is suitable for materials that do not require heating, such as graphite film, graphite sheet, absorbing materials, shielding materials, magnetic materials, non-ferrous metal materials, etc. Calenders can be divided into two-roller, three-roller, four-roller and five-roller calenders according to the number of rollers. Among them, most two-roller calenders are independent devices, and there are no automatic two-roller calenders that can be connected to the production line. The raw materials that have been calendered need to be manually processed again before they can be used on the production line. Therefore, the degree of automation of the production method is not high, and the human influence factor is serious. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a winding and unwinding mechanism of a two-roll calender for calendering polytetrafluoroethylene composite materials. The specific technical scheme is that a winding and unwinding mechanism of a two-roll calender for calendering polytetrafluoroethylene composite materials includes a winding mechanism and an unwinding mechanism, wherein the unwinding mechanism includes an unwinding shaft, a first unwinding roller, an unwinding correction device, a second unwinding roller, and an unwinding traction device, and the winding mechanism includes a traction and winding device, a first winding roller, a trimming device, a winding correction device, a second winding roller, and a winding shaft, characterized in that: between the unwinding shaft and the two-roll calender is the unwinding mechanism side, and on the unwinding mechanism side, the first unwinding roller, the correction device, The second unwinding roller and the unwinding traction device, the bottom roller of the unwinding traction device is equipped with a spring device, the tension on the unwinding mechanism side is set to 0.8-1.1N / m, the winding mechanism side is between the two-roll calender and the winding shaft, and the winding traction device, the first winding roller, the trimming device, the winding correction device, the second winding roller, and the winding shaft are placed symmetrically on the winding mechanism side, the bottom roller of the traction device is equipped with a spring device, and the tension on the winding side is set to 0.5-0.8N / m, so that the unwinding mechanism side device and the winding mechanism side device are placed on the same straight line.

[0004] The unwinding shaft and the rewinding shaft are of the same height.

[0005] The technical effect of the present invention is that it solves the problem of raw material accumulation on both sides of the two-roll calender, so that the produced coil has good thickness uniformity and no wrinkles. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a mechanism connection diagram of the present invention.

[0007] Specific implementation method:

[0008] Example

[0009] like Figure 1 As shown, the two-roll calender winding and unwinding mechanism for calendering polytetrafluoroethylene composite materials has the following parameter settings:

[0010] 1. Set the unwinding tension to 1.0N / m;

[0011] 2. The unwinding side material 1 passes through the roller 2, the deviation correction device 3, the roller 4, the traction device 5, and enters the two-roll calender;

[0012] 3. Set the winding tension to 0.8N / m;

[0013] 4. On the winding side, the raw material passes through the traction device 6, the roller 7, the cutting device 8, the deviation correction device 9, the roller 10, and the winding shaft 11 for winding.

[0014] principle

[0015] By controlling the tension on both sides of the unwinding and rewinding coils and ensuring that the height of the inlet and outlet ends of the two-roll calender are level with the gap between the calender rollers, and by equipping the lowest roller of the traction device with a spring device, the problem of raw material accumulation at the inlet and outlet ends of the two-roll calender is solved, achieving the final calendering effect and making the produced coils have good uniformity in thickness and no wrinkles.

Claims

1. A two-roll calendering machine winding and unwinding mechanism for calendering a polytetrafluoroethylene composite material, comprising a winding mechanism and an unwinding mechanism, wherein the unwinding mechanism comprises an unwinding shaft (1), a first unwinding roller (2), an unwinding deviation correction device (3), a second unwinding roller (4), and an unwinding traction device (5), and the winding mechanism comprises a winding traction device (6), a first winding roller (7), a trimming device (8), a winding deviation correction device (9), a second winding roller (10), and a winding shaft (11), characterized in that: The unwinding mechanism side is located between the unwinding shaft (1) and the two-roller calender (14), and the first unwinding roller (2), the unwinding deviation correction device (3), the second unwinding roller (4), and the unwinding traction device (5) are arranged in sequence, wherein the bottom roller of the unwinding traction device (5) is equipped with a first spring device (12), and the tension of the unwinding mechanism side is set to 0.8-1.1 N / m. The rewinding mechanism side is located between the two-roller calender (14) and the rewinding shaft (11), and the rewinding traction device (6), the first rewinding roller (7), the trimming device (8), the rewinding deviation correction device (9), the second rewinding roller (10), and the rewinding shaft (11) are arranged symmetrically with the rewinding mechanism side in sequence, wherein the bottom roller of the rewinding traction device (6) is equipped with a second spring device (13), and the tension of the rewinding side is set to 0.5-0.8 N / m, so that the unwinding mechanism side device and the rewinding mechanism side device are arranged on the same straight line.

2. The two-roll calender unwinding and winding mechanism for calendering a polytetrafluoroethylene composite material according to claim 1, characterized in that: The unwinding shaft (1) and the rewinding shaft (11) are of the same height.

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