Calendar for PVC film processing process

Abstract

The invention discloses a calender for a PVC film processing process. The calender comprises a frame, a calendering device arranged on the frame and a scraping device arranged at the front part of theframe. The calendering device comprises a first pressing roller, a second pressing roller arranged on one side of the first pressing roller, a third pressing roller arranged below the second pressingroller, a fourth pressing roller arranged below the third pressing roller, first connecting blocks arranged on the left side and the right side of the first pressing roller and the second pressing roller, second connecting blocks arranged on the left side and the right side of the third pressing roller, third connecting blocks arranged on the left side and the right side of the fourth pressing roller, transmission devices arranged on the connecting blocks, a discharging device arranged on the first pressing roller, and the scraping device arranged at the front part of the fourth pressing roller. According to the calender, intermittent blanking is carried out through a blanking trough, so that the blanking is more uniform, two sides of a PVC film are the same in thickness, the PVC film isrolled and flattened through a flattening device, the consistent thickness can be realized by the scraping device, meanwhile, scraped materials can be recycled, and thus resources are saved.

Description

technical field [0001] The invention belongs to the technical field of PVC film processing, and in particular relates to a calender used in the PVC film processing technology. Background technique [0002] The calender has two or more rollers arranged in a certain form, and at a certain temperature, the rubber or plastic is pressed and stretched into a film of a certain thickness. The main component of PVC film is polyvinyl chloride board, which has good heat resistance, toughness and ductility, and is widely used in the surface packaging of various panels, so it is also called decorative film or adhesive film. [0003] During the calendering process, the melted PVC mixture is pasted on the roller of the calender, and the roller squeezes the PVC mixture to extend it during the rotation process, and the PVC mixture needs to be extruded into a film with a certain shape and thickness for later processing. The drawing film setting treatment. However, PVC is spread out to both ...

AI Technical Summary

Problems solved by technology

However, PVC is spread out to both sides under the action of natural gravity and mutual extrusion between the rollers, which will cause the middle thickness of the PVC mixture on the roller to be greater than the thickness of the edges on both sides. The material is uneven, which affects the quality of the PVC film after calendering

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