Microwave-heated rotational molding die equipment and method for manufacturing rotational molding product

Abstract

The invention relates to microwave-heated rotational molding die equipment, and relates to machines in chemical industry. The microwave-heated rotational molding die equipment is characterized by comprising a microwave source, a die upper die, an upper die flange, a lower die flange and a movable constant temperature heating box; a clamping groove is fixed on a die lower die; the clamping groove and a support roller are matched to support the die lower die; the upper die flange and the lower die flange on the die lower die are locked by a die clamp to form a die whole; the die upper die is connected with a motor by a transmission device to rotate axially; the microwave heating source is connected with the die upper die by a microwave transmission pipe so as to input microwave to a die cavity; the constant temperature heating box with a thermodetector is covered on the die whole formed by the die upper die and the die lower die; the components are arranged on a base integrally; and both ends of the base are respectively connected with a base hinge and a base wabble mechanism to form a wabble structure. The microwave-heated rotational molding die equipment has high heat conduction efficiency, uniform heating, low cost and low noise.

Description

technical field [0001] The invention belongs to the field of material chemical industry, in particular to a rotational molding mold and a method for manufacturing rotational molding products using the mold. Background technique [0002] Rotational molding (rotational moulding; plastic rotational casting; roto-molding; rotomould), also known as rotational molding, rotational casting molding, is a thermoplastic hollow molding method. That is, the powdery or pasty material is injected into the mold first, and through the heating of the mold and the vertical and horizontal rolling rotation, the material is evenly filled with the inner cavity of the mold by its own gravity and centrifugal force and melted, and the mold is demoulded after cooling. Get hollow products. [0003] Due to the low rotational speed of rotational molding, relatively simple equipment, and almost no internal stress in the product, it is not easy to deform and sag, so it has been widely promoted and applied...

AI Technical Summary

Problems solved by technology

Its inevitable defects are: 1) It requires high personal experience of the operator; 2) It is difficult to prepare molds with more complex shapes by hand; 3) The precision of the mold is low; 4) The production cycle is long; 5) The cost is high

Most of the air heating in the hot gas chamber used in actual use generally uses fuel, electric heating air, and thermal oil for indirect heating. Due to the limitation of the heat conduction efficiency of the mold, the utilization rate of heat energy is extremely low; the jacket thermal oil is pumped and rotated by high-temperature oil Problems such as sealing make the process difficult and the operating cost extremely high in practical applications

At the same time, due to the hysteresis of the temperature control reaction, it is difficult to adjust the required temperature when the plastic resin is coated, melted, and adhered, resulting in overheating and carbonization of the plastic material or a sharp drop in physical and chemical properties, so it is difficult to recycle the rotomolded parts

At the same time, the environment of the high-temperature hot chamber causes oxidation and corrosion of rotating supports, mold accessories, etc., and the material selection of supports is limited, which limits the development of rotational molding automation.

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