Coating device on plastic sheet material production line

Abstract

The invention discloses a coating device used on a plastic sheet material production line. With the device, the cleaning of scraping bars is easy. The coating device comprises a frame. An input roll, an output roll, and a coating roll are arranged on the frame. The input roll and the output roll are respectively arranged at upper-side positions on two sides of the coating roll. A liquid tank matching the coating roll is arranged on the bottom of the frame. At least one pair of scraping bars is arranged on the frame and between the coating roll and the output roll. At least two scraping bars are positioned on two sides of a plastic sheet material delivery path. The scraping bar specifically comprises a coating section positioned at the middle and guiding parts positioned on two ends. A plurality of parabolic annular protrusions crossing the width of the plastic sheet material and with openings facing inwards are arranged on the coating section. According to the invention, the vertical section of the coating section of the scraping bar has a wavy integral structure, such that defects of gaps and wire breaking and wire falling of traditional scraping bars formed by winding steel wires are overcome. Therefore, the cleaning of scraping bars is easy, and oil scraping effect is ensured.

Description

technical field [0001] The invention relates to a plastic plate production line, in particular to a coating device on the plastic plate production line. Background technique [0002] In the production process of plastic sheets such as PET, in order to improve the antistatic performance of PET sheets, it is usually necessary to oil the surface of PET sheets. The coating device on the traditional plastic sheet material production line has a structure including a frame, which is provided with a lead-in roller, a lead-out roller and a coating roller. The bottom of the machine is equipped with a liquid tank matching the coating roller, and a pair of scraping rods are arranged between the coating roller and the outlet roller on the frame. The coating section consists of steel wires that are twisted together. For such a scraping rod, due to the gap between the steel wire and the steel wire, in order to ensure the oil scraping effect, the gap between the steel wire and the steel w...

AI Technical Summary

Problems solved by technology

For such a scraping rod, due to the gap between the steel wire and the steel wire, in order to ensure the oil scraping effect, the gap between the steel wire and the steel wire should be as small as possible, which makes the foreign matter stuck between the steel wire and the steel wire during actual use. In the gap, the cleaning of the scraping rod is very troublesome, and it affects the oil scraping effect; in addition, it is easy to cause broken wires and filaments, which makes the working surface of the scraping rod not smooth and scratches the PET sheet

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