Mould preparation method, mould, mould heating system and heating controlling method

Abstract

The invention discloses a mould preparation method, a mould, a mould heating system and a heating controlling method. The method comprises the following steps: S1, dividing heating areas; S2, pre-setting at least one heating flow channel in each of the heating areas, and the method for determining structural parameters of the heating flow channels comprises the following steps: S21, pre-setting the structural parameters of the heating flow channels; S22, obtaining an actual heating curve of each of the heating areas and actual temperature of each of position points of a mold cavity surface; S23, carrying out deviation analysis and adjusting the structural parameters of the heating flow channels according to a deviation analysis result; S24, repeatedly carrying out the steps S22 and S23; and S3, carrying out processing according to the structural parameters of the heating flow channels to form flow channels. The mould is heated in subareas, and the structural parameters of the flow channels are determined separately in each of the heating areas, so that the phenomena that the overall heat response speed of the mould and the temperature uniformity of the whole mold cavity can meet the requirement can be ensured, and by adopting the method, the requirement on quick change of the mould temperatures of complicated modular unit structures can be met, and subarea heating can be conveniently carried out.

Description

technical field [0001] The invention relates to the field of injection molding, in particular to a mold preparation method, a mold, a mold heating system and a heating control method. Background technique [0002] At present, fast-changing mold temperature technology has broad prospects in the field of high-gloss injection molding. Compared with conventional injection molding technology, fast-changing mold temperature technology can significantly improve the surface quality of plastic parts, and obtain plastic products with high-gloss surface and no melting marks. [0003] In the existing fast-changing mold temperature technology, electromagnetic induction heating, oil heating, flame heating, electric heating and high-temperature steam heating are usually used. Among them, the technology of high-temperature steam to realize fast-changing mold temperature has low energy consumption compared with other technologies. , The advantage of less environmental pollution, so it is fav...

AI Technical Summary

Problems solved by technology

The rapid heating effect of the fast-changing mold temperature technology is closely related to the geometric structure of the mold itself, especially for the mold with multi-curved surfaces, multi-steps, porous grooves, narrow channels and other structures, the heating design of the traditional mold does not take into account the above geometric structure The difference in melt flow caused by the traditional design method makes the thermal response of the mold worse, and the temperature uniformity of the cavity surface is not good, resulting in poor product quality or poor surface gloss

[0004] In the prior art, the master's degree thesis published by Chongqing University in 2013 (name: Optimum Design of Heating Pipeline for Rapidly Variable Mold Temperature Injection Mold; Author: Dong Jingjing; Publication Time: October 31, 2013) discloses that multiple heaters are set in the mold. Runner, high-temperature steam is passed into each heating runner, and the design of the mold with fast-changing mold temperature is realized by designing the diameter, spacing, and distance from the cavity of the heating runner, but only considering the overall average effect, in the rapid Under heating conditions, it cannot meet the partition heating requirements of complex structures

The mold cannot be heated in different areas, and the mold temperature in different areas can be controlled with high precision. There are problems of inaccurate temperature control and uneven heating in each area of ​​the module, resulting in unstable product quality.

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