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Molding sand for die casting

A molding sand and mold technology, applied in foundry molding equipment, molds, cores, etc., can solve problems such as the disclosure of thermal diffusivity and heat storage coefficient, workers suffering from silicosis, and large expansion coefficients, so as to reduce the health risks of workers, Low price and high thermal conductivity

Active Publication Date: 2016-02-10
广西博白县三田机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its large expansion coefficient, thermal diffusivity and heat storage coefficient, it is easy to have sand sticking defects during casting, and it is easy to produce dust with high silicon content during processing and use, causing workers to suffer from silicosis.
[0004] Limestone sand will not produce harmful dust in the casting process, and has the advantages of good collapsibility and smooth casting surface. crack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A molding sand for mold casting is composed of the following raw materials: 60 kg of quartz sand, 40 kg of limestone sand, 5 kg of chrome ore sand, 1 kg of zircon sand, and 3 kg of corundum sand.

[0022] The preparation method is to mix the raw materials according to the ratio, and stir evenly to obtain the product.

Embodiment 2

[0024] A molding sand for mold casting is composed of the following raw materials: 80 kg of quartz sand, 20 kg of limestone sand, 20 kg of chrome ore sand, 8 kg of zircon sand, and 1 kg of corundum sand.

[0025] The preparation method is to mix the raw materials according to the ratio, and stir evenly to obtain the product.

Embodiment 3

[0027] A molding sand for mold casting is composed of the following raw materials: 650kg of quartz sand, 350kg of limestone sand, 70kg of chrome ore sand, 10kg of zircon sand, 20kg of corundum sand, and 2kg of graphite powder.

[0028] The preparation method is to mix the raw materials according to the ratio, and stir evenly to obtain the product.

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Abstract

The invention relates to molding sand for die casting. The molding sand is composed of quartz sand, limestone sand, chromium ores, zircon sand and emery. The molding sand is suitable for evaporative pattern casting, not prone to adhesion to sand, settlement shrinkage or earthworm cracking and low in cost, the reusability and collapsibility are good, and hidden dangers to health of workers are reduced.

Description

technical field [0001] The invention relates to the field of casting, in particular to a molding sand for mold casting. Background technique [0002] Mold casting is a part of casting tooling, and it is the necessary equipment to shape the casting and obtain the required casting. Lost foam casting, also known as solid casting, is to bond and combine paraffin or foam models similar in size and shape to castings to form a model cluster. After brushing with refractory paint and drying, it is buried in dry sand for vibration modeling, and poured under negative pressure. , the model is vaporized, the liquid metal occupies the position of the model, solidified and cooled to form a new casting method of castings. [0003] Quartz sand has always been the most commonly used and most basic molding sand material in foundry production. It has a high melting point and hardness, good reusability, wide distribution, and low price. However, due to its large expansion coefficient, thermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00
Inventor 陈杰陈智强凌丽英陈勇
Owner 广西博白县三田机械制造有限公司
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