PVC plate press-polishing device adopting composite roll-arranging system and production line

Abstract

The invention discloses a PVC plate press-polishing device adopting a composite roll-arranging system and a production line. The device comprises a rack, a medium-pressure roll c, a medium-pressure roll d, an upper pressure roll a and a lower pressure roll b, wherein the rack is used for longitudinally fixing three pressure rolls; the medium-pressure roll c and the medium-pressure roll d are the same in structure, a heating mechanism is arranged in each roll, and one roll is a backup while the other roll is used; a heating mechanism is arranged in the upper pressure roll a to form a plate discharge end; a heating mechanism is arranged in a lower pressure roll b to form a plate charge end; the upper pressure roll a, the medium-pressure roll c and the lower-pressure roll b are fixedly arranged on the rack from top to bottom according to a first roll-arranging system; or the lower-pressure roll b, the medium-pressure roll d and the upper-pressure roll a are fixedly arranged on the rack from top to bottom according to a roll-changing and roll-arranging system. According to the PVC plate press-polishing device adopting the composite roll-arranging system, by adopting the upper pressure roll and the lower pressure roll which are the same in structure and the two medium-pressure rollers which are the same in structure, the two pressure rolls are transferred up and down and are matched with the two medium-pressure rolls for use, so that the utilization rate of pressure rolls is increased, and 1 / 3 of the pressure roll cost is saved; the roughness and the brightness of the PVC plate surface are good; and moreover, the surface is continuous and is uniform in thickness, so that the plate quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of plate production and processing, and in particular relates to a PVC plate forming device and also relates to a PVC plate production line. Background technique [0002] The three-roll calendering device is an important equipment for the production of plastic sheets and has been widely used. The currently used three-roll calendering device includes a middle pressure roll, an upper pressure roll, and a lower pressure roll. The middle pressure roll, the upper pressure roll, and the lower pressure roll are fixedly connected There is a heating mechanism inside the pressing rollers, the lower pressing roller is the feeding end, and the upper pressing roller is the discharging end. During production, the PVC sheet is reciprocally rolled and formed and calendered between three rollers. Since the middle pressure roller is squeezed with the upper pressure roller and the lower pressure roller respectively, the surfa...

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Problems solved by technology

During production, the PVC sheet is reciprocally rolled and formed and calendered between three rollers. Since the middle pressure roller is squeezed with the upper pressure roller and the lower pressure roller respectively, the surface of the middle pressure roller wears relatively quickly, while the upper pressure roller, The roller surface of the lower pressure roller wears slowly, and the roller surface wears sequentially along the moving direction of the plate, so it needs to be removed and replaced in time, but the upper and lower pressure rollers have not yet reached half of the set value of the use, and the upper pressure roller , The utilization rate of the lower pressure roller is low, the cost of spare parts is large, and the production cost increases

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