Injection molding machine super-thick large piece pouring system and pouring technology thereof

Abstract

The invention discloses an injection molding machine super-thick large piece pouring system and a pouring technology thereof. Molten iron enters a first cross gate through a sprue on a casting, thin gates are arranged at the tail end of the first cross gate, and most of slag is blocked by the first cross gate; then the molten iron enters a second cross gate, the slag is blocked through thin inner gates, and the waste slag is shielded by the second cross gate; and the flow velocities of the inner gates and the thin gates are lower than 50 cm / s, and secondary oxidation slag is avoided. According to the injection molding machine super-thick large piece pouring system and the pouring technology thereof, the casting scrapped risk caused by fragments of a filter screen and a ceramic tube is reduced; the operating efficiency of staff is improved, and the cost is reduced; and impurities in foundry returns are reduced, the purity degree of the molten iron is increased, and the purity degree of reclaimed sand is increased.

Description

technical field [0001] The invention belongs to the pouring system design of the casting process, and in particular relates to a pouring system for super-thick and large parts of an injection molding machine and a pouring process thereof, which fully utilizes the pouring system to block slag and avoid slag, so as to ensure the internal quality and appearance quality of products. Background technique [0002] With the continuous development of the energy industry, the lightweight of future automobiles is an inevitable development trend, and plastic materials will be widely used, so the production of large-scale injection molding machines will usher in new opportunities. The injection molding machine currently produced is made of QT400-18 material. The casting adopts a silicon carbide filter screen to filter, and the pouring system scheme of ceramic tube bottom pouring is designed to filter out slag inclusions and make it fill the mold smoothly. As the product becomes larger a...

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Problems solved by technology

Such a process has the following problems: 1. There is a risk of crushing the filter screen and ceramic tube, and the more you use it, the greater the risk; 2. The on-site preparation work is cumbersome and the operation efficiency is low; 3. The use of auxiliary materials is too much, which pollutes the environment 4. The recycling pouring system contains silicon carbide, which affects the quality of molten iron; 5. After cleaning, the broken ceramic tube enters the sand treatment system, which affects the use of recycled sand

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