Calendering shaping device for polyethylene glycol terephthalate (PET) nano reinforced plate production line

Abstract

The invention discloses a calendering shaping device for a polyethylene glycol terephthalate (PET) nano reinforced plate production line, which can reduce the temperature difference between upper and lower surfaces of a strip blank during shaping. The device comprises a frame, wherein the frame is sequentially provided with a pair of cooling calendering rollers parallel to each other, a front shaping heating roller and a back shaping heating roller; and the frame is provided with a shaping heating device which is matched with the front shaping heating roller above the front shaping heating roller. The shaping heating device matched with the front shaping heating roller is arranged above the front shaping heating roller, so that the upper and lower surfaces of a PET plate strip blank are heated when passing through the front shaping heating roller, the temperature difference between the upper and lower surfaces of the PET plate strip blank is reduced and the calendering shaping device can shape PET plates with the thickness of more than or equal to 2mm, namely PET thick plates.

Description

technical field [0001] The invention relates to a calendering and shaping device for a PET board production line, in particular to a calendering and shaping device for a PET nano-reinforced board production line. Background technique [0002] The structure of the current PET board production line usually includes: an extruder arranged in series, a calender setting device, an edge trimming device, a film covering device and a cutting device. Wherein, the structure of the calendering and setting device includes: a frame, on which a pair of cooling calendering rollers parallel to each other and a front and rear shaping heating roller are sequentially arranged. In the production process of PET sheet, the PET strip blank extruded from the die of the extruder is calendered by a pair of cooling calender rollers, and then heated and shaped when passing through the front and rear shaping heating rollers. When the PET strip blank passes through the cooling calender rolls, its upper a...

AI Technical Summary

Problems solved by technology

When the PET strip blank passes through the cooling calender rolls, its upper and lower surfaces are respectively in contact with one of the cooling calender rolls. In terms of the contact area, the upper surface of the PET strip blank and the coating of the cooling calender roll The area is much larger, resulting in a temperature difference between the upper and lower surfaces of the PET strip blank. The thicker the PET strip blank, the more obvious the temperature difference, which makes the strip blank when producing PET sheets with a thickness ≥ 2 mm. The upper surface of the upper surface cannot get enough heat during the pre-setting heating roller, so that the strip blank cannot be well shaped, which affects the quality of the finished PET board

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