A high-strength and tough die-casting sand core and its preparation method and molding process of die-casting parts

Abstract

The application relates to the field of die-casting technology, and specifically discloses a high-strength and tough die-casting sand core, a preparation method thereof, and a molding process of a die-casting part. High-strength die-castable sand core molding resin sand core and protective layer, the protective layer is evenly coated on the outer wall of the molding resin sand core; the protective layer includes the following components in parts by weight: 3-5 parts of class I synthetic fiber; 1-part of pottery clay 2 parts; 5-7 parts of aluminum oxide; 26-38 parts of adhesive; 3-5 parts of titanium dioxide; Alumina powder, sodium silicate and titanium dioxide are stirred for 50-80 minutes to obtain a coating; 1.2. Preparation of molded resin sand core: mix quartz sand, liquid casting resin and curing agent evenly, and add core box to make core manually; 1.3 1. Apply paint evenly on the outer peripheral wall of the molded resin sand core, and bake at 130-150°C for 180-300min to obtain a high-strength and tough die-casting sand core. The high-strength and tough die-casting sand core of the present application has the advantage of solving the problem that the die-casting part cannot be formed by placing a sand core.

Description

technical field [0001] The application relates to the technical field of die-casting, more specifically, it relates to a high-strength and tough die-casting sand core, a preparation method thereof, and a molding process of die-casting parts. Background technique [0002] Metal die-casting is the process of filling molten metal into the cavity of a die-casting model at a high speed under high pressure, and solidifying the molten metal under high pressure to form a metal die-casting. One of the most efficient. With the development of metal die-casting, metal die-casting technology, plastic injection molding, and metal plate stamping are listed as three major molding systems. The salient feature of metal die-casting is that it can form non-ferrous metal structural parts with complex shapes and thin walls. It is a high-efficiency, high-precision, high-interchangeability, and low-consumption precision parts forming technology. [0003] At present, for die-casting parts with und...

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Problems solved by technology

[0005] In the molding process of die-casting parts, in order to avoid the strength problem of the resin sand core caused by the erosion of the resin sand core in the high-temperature and high-pressure environment, resulting in sand loss and block loss and affecting the quality of the die-casting parts, this application provides a high-strength, tough and easy-to-clean die-casting sand Core and its preparation method and molding process of die casting

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