High-reliability bending device for plastic processing and bending method

Abstract

The invention discloses a high-reliability bending device for plastic processing, and belongs to the field of bending devices. The high-reliability bending device for plastic processing comprises a base and a workbench. A hydraulic cylinder is arranged at the top of the supporting base. A heating resistance wire is arranged in an inner cavity of a heating tube. The right side of the heating tube is connected with a three-way pipe. The heating resistance wire is used for heating air in the heating tube. Hot air then enters an inner cavity of a preheating chamber. A plastic product is preheatedin advance and then is softened through baking by a baking lamp, the bake-softening speed is increased, and the baking time of the baking lamp is shortened; the hydraulic cylinder drives a telescopicrod, the telescopic rod then pushes a second driven wheel, the moving distance of the second driven wheel is determined according to a calibrated scale, and thus, the degree of bending of the plasticproduct is changed by changing the moving distance of the second driven wheel; and an air blower enters the annular hose through a three-way joint, the direction of an air nozzle can be adjusted freely through the annular hose, air is blown towards the bake-softened and bent plastic product through the air nozzle, and thus cooling and shaping of the plastic product are accelerated.

Description

technical field [0001] The invention relates to the field of bending devices, in particular to a highly reliable bending device and a bending method for plastic processing. Background technique [0002] Plastic products are a general term for household and industrial products processed with plastic as the main raw material, including products of all processes such as injection molding and blister using plastic as raw material. Bending generally refers to the fact that the metal sheet first undergoes elastic deformation under the pressure of the upper or lower die of the bending machine, and then enters plastic deformation. In the initial stage of plastic bending, the sheet is free to bend. When the die exerts pressure on the sheet, the sheet and the inner surface of the groove of the lower die gradually close together, and at the same time the radius of curvature and the bending arm also gradually decrease. Continue to pressurize until the stroke ends, so that the upper and ...

AI Technical Summary

Problems solved by technology

Bending generally refers to the fact that the metal sheet first undergoes elastic deformation under the pressure of the upper or lower die of the bending machine, and then enters plastic deformation. In the initial stage of plastic bending, the sheet is free to bend. When the die exerts pressure on the sheet, the sheet and the inner surface of the groove of the lower die gradually close together, and at the same time the radius of curvature and the bending arm also gradually decrease. Continue to pressurize until the stroke ends, so that the upper and lower dies and the sheet are close at three points. At this time, a bend is completed, which is commonly known as bending. The existing bending devices for plastic processing have the disadvantage of low bending accuracy.

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