Air pressure forming machine for plastic sheet

Abstract

The invention discloses an air pressure forming machine for a plastic sheet, which comprises an unwinding device, a sheet feed device, a chain track device, a sheet conveying device, a heating device, a forming device, a cup receiving device and a finished product collection device, wherein the sheet feed device comprises a rack, a sheet feed guide roller, a sheet feed compression roller, a supporting plate and a preheating device; the sheet feed guide roller and the sheet feed compression roller are rotationally mounted on the rack; the supporting plate is arranged on the rack; the sheet feed compression roller is located above the sheet feed guide roller, and laminated with the sheet feed guide roller; the supporting plate is arranged at the rear of the sheet feed guide roller; the preheating device comprises a left preheating furnace and a right preheating furnace; a left adjustment rod connected with a sheet inlet mechanism on the left side of the chain track device is arranged on a left preheating furnace mounting seat; and a right adjustment rod connected with a sheet inlet mechanism on the right side of the chain track device is arranged on a right preheating furnace mounting seat. The air pressure forming machine can be linked with the chain track device to adjust applicable sheet width, therefore, the applicable sheet width of the sheet feed device can be conveniently and quickly adjusted, the workload of operating personnel can be reduced, and the working efficiency can be improved.

Description

technical field [0001] The invention relates to a thermoforming machine, in particular to a plastic sheet air pressure forming machine. Background technique [0002] The plastic sheet air pressure thermoforming machine generally includes an unwinding device, a sheet feeding device, a chain rail device, a sheet feeding device, a heating device, a forming device (including forming, punching and cutting), a cup receiving device and a finished product collecting device. Device, film feeding device, chain rail device, forming device (including forming, punching and cutting), cup receiving device, and finished product collection device are set up in sequence. The film feeding device is set on the chain rail device, and the heating device is set on the chain rail device. Up and down sides. The plastic sheet is sent out from the unwinding device, enters the chain rail device of the plastic sheet air pressure thermoforming machine from the sheet feeding device, and is transported by...

AI Technical Summary

Problems solved by technology

[0005] In actual production, it is often necessary to use the same plastic sheet air pressure thermoforming machine to manufacture plastic products of different specifications, so the width of the plastic sheet used often changes. At this time, it is necessary to adjust the sheet feeding device and the chain rail device. The applicable width of the material, that is, adjust the distance between the left preheating furnace and the right preheating furnace, and adjust the distance between the left film feeding mechanism and the right film feeding mechanism in the chain rail device. Due to the traditional film feeding device and the chain The rail device is separated, so the applicable width of the sheet of the sheet feeding device and the chain rail device is adjusted separately, which increases the workload of the operator and reduces the work efficiency

[0006] Secondly, affected by factors such as the difference in thickness of the plastic sheet, inconsistent preheating softening degree, and ambient temperature, the plastic sheet is prone to irregular bending after being heated by the left preheating furnace and the right preheating furnace. When it is on the pallet, the plastic sheet is prone to scratches due to friction with the pallet; moreover, when the plastic sheet reaches the gap between the rear end of the pallet and the front end of the chain rail device, the middle part of the plastic sheet is easy to arch upwards. From the beginning, it is difficult to smoothly pass between the guide roller and the guide roller and automatically transition to the chain rail device, so that it is necessary to manually guide the plastic sheet into the chain rail device, which increases a lot of workload for the operator

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