High-toughness die-casting sand core, preparation method of high-toughness die-casting sand core and forming process of die casting

Abstract

The invention relates to the technical field of die casting, and particularly discloses a high-toughness die-casting sand core, a preparation method of the high-toughness die-casting sand core and a forming process of a die casting. The high-toughness die-casting sand core comprises a molded resin sand core and a protective layer, wherein the protective layer is uniformly coated on the outer side wall of the molded resin sand core; and the protective layer comprises the following components in parts by weight: 3-5 parts of I-type synthetic fibers, 1-2 parts of pottery clay, 5-7 parts of aluminum oxide, 26-38 parts of an adhesive, 3-5 parts of titanium dioxide, and 43-62 parts of water. The preparation method comprises the following steps that 1.1, a coating is prepared, specifically, the I-type synthetic fibers, the argil, the alumina powder, the sodium silicate and the titanium dioxide are weighed, and stirring is carried out for 50-80 minutes to obtain a coating; 1.2, the molded resin sand core is prepared, specifically, quartz sand, liquid casting resin and a curing agent are uniformly mixed, added into a core box, and core making is manually carried out; and 1.3, the coating is evenly brushed on the peripheral wall of the molded resin sand core, baking is conducted for 180-300 min at the temperature of 130-150 DEG C, and the high-toughness die-casting sand core can be obtained. The high-toughness die-casting sand core has the advantage that the problem that a die casting cannot be formed by placing the sand core is solved.

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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