Induction heating system with external combined induction heating coil phased arrays and application for induction heating system

Abstract

The invention discloses an induction heating system which is provided with external combined induction heating coil phased arrays and used for an injection molding process and an application for the induction heating system, and belongs to the field of methods for manufacturing injection molding products. According to the technical scheme, a singlechip, a relay, inverters, coils and a keyboard are provided, wherein a program for controlling each heating mode states is pre-set in the singlechip; and switching among the heating mode states is realized by the keyboard; induction coils is powered on or powered off according to the preset program sequence or other ways, so that mutual influence of magnetic fields among the coils is eliminated, and the heating efficiency is improved; and meanwhile, the coils also can be separately or synchronously powered on or powered off according to the specific sequence, so that local temperature of a mould cavity can be controlled, and the heating flexibility is increased; and therefore, the system is particularly suitable for performing injection molding on parts which are made of thermoplastic or thermosetting composite materials or heating complicated mould cavities of injection moulds and locally heating the mould cavities of the injection moulds during compression molding production.

Description

technical field [0001] The invention relates to an induction heating system applied to the manufacturing technology of injection molding products, in particular to an external combined induction heating coil applied to injection molding molds and its time sequence control heating system and its application. Background technique [0002] In order to solve the quality problems such as poor surface finish, short shots and weld marks that often occur in injection molding production, and to produce plastic products with high flow-length ratio, ultra-thin wall and microstructure, the mold cavity heating system is usually used at present. Induction heating is a technique for rapid heating of mold cavities. The application of induction heating to mold cavity heating has many advantages, such as short heating and cooling time, strong versatility, and relatively uniform mold temperature can be obtained. According to different induction heating devices, induction heating applied to ca...

AI Technical Summary

Problems solved by technology

This kind of induction heating system is that each coil is heated at the same time, and it is turned off separately only after reaching the set temperature. The magnetic field between the unit coils interferes with each other, and the thermal efficiency loss is large.

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