Molding sand containing wood fiber and production method thereof

A technology of wood fiber and molding sand, applied in the field of foundry industry, can solve the problems of poor finish, poor air permeability, rough surface of aluminum sand parts, etc., and achieve the effects of simple production method, low cost and reasonable formula

Active Publication Date: 2012-10-17
繁昌县琦祥铸造厂普通合伙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Molding sand is a material used for molding in sand casting. Molding sand is generally made of casting sand, molding sand binder and auxiliary additives and other molding materials mixed in a certain proportion. Natural silica sand containing clay can also be used. Usually, it is used for aluminum casting. In the molding sand formula, the particle size of the molding sand is too large or too small, and the diameter of the molding sand is too large. Although the air permeability is good, the surface of the aluminum sand parts is rough and the finish is not good. The diameter of the molding sand is too small, resulting in poor air permeability of the sand mold. Aluminum castings have pores and are easy to produce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: The molding sand containing wood fiber is composed of raw materials in parts by weight: miscellaneous wood chips 80, recycled sand 10, quartz sand 5, glass fiber 3, cement 1, water glass 3, wood fiber 1, flour 5, and an appropriate amount of water. The glass fiber is dried and pulverized for use.

[0013] A method for making molding sand containing wood fibers, comprising the following steps:

[0014] (1) Mix miscellaneous wood chips, recycled sand, quartz sand, glass fiber (), cement, water glass, wood fiber and flour according to the weight of the raw materials, first dry mix for 10-20 seconds, then add water and mix for 10-20 minutes ;

[0015] (2) Put the mixture obtained in step (1) into the sand storage hopper, and form and separate to obtain the finished product.

Embodiment 2

[0016] Example 2: The molding sand containing wood fiber is composed of raw materials in parts by weight: miscellaneous wood chips 85, recycled sand 15, quartz sand 8, glass fiber 4, cement 2, water glass 4, wood fiber 2, flour 8, and an appropriate amount of water.

[0017] A method for making molding sand containing wood fibers, comprising the following steps:

[0018] (1) Mix miscellaneous wood chips, recycled sand, quartz sand, glass fiber, cement, water glass, wood fiber and flour according to the weight of the raw materials, first dry mix for 10-20 seconds, then add water and mix for 10-20 minutes;

[0019] (2) Put the mixture obtained in step (1) into the sand storage bucket, shape and separate to obtain the finished product.

Embodiment 3

[0020] Example 3: The molding sand containing wood fiber is composed of raw materials in parts by weight: miscellaneous wood chips 90, recycled sand 20, quartz sand 10, glass fiber 5, cement 3, water glass 5, wood fiber 3, flour 10, and an appropriate amount of water.

[0021] A method for making molding sand containing wood fibers, comprising the following steps:

[0022] (1) Mix miscellaneous wood chips, recycled sand, quartz sand, glass fiber, cement, water glass, wood fiber and flour according to the weight of the raw materials, first dry mix for 10-20 seconds, then add water and mix for 10-20 minutes;

[0023] (2) Put the mixture obtained in step (1) into the sand storage bucket, shape and separate to obtain the finished product.

[0024] The technological performance of the molding sand that the present invention makes:

[0025] Wet compressive strength: 0.094MPa, air permeability: 81%, hot and wet tensile strength: 328Kpa, crushing index: 87%.

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Abstract

The invention discloses a molding sand containing wood fiber and a production method thereof. The method comprises steps of: carrying out dry mixing on raw materials of 80-90 parts of mixed wood, 10-20 parts of recycling sand, 5-10 parts of quartz sand, 3-5 parts of glass fiber, 1-3 parts of cement, 3-5 parts of water glass, 1-3 parts of wood fiber, 5-10 parts of flour and a proper amount of water; then adding and mixing with water; and carrying out sand release, molding, casting aluminum water, and cooling and separation to obtain a finished product. The invention has advantages of simple production method, reasonable formula, low cost, high production efficiency; adoption of quartz sand and glass fiber as variant sand raw materials can change waste into treasure; and addition of wood fiber can increase the strength of the molding sand.

Description

technical field [0001] The invention relates to molding sand containing wood fiber and a manufacturing method thereof, belonging to the field of foundry industry. Background technique [0002] Molding sand is a material used for molding in sand casting. Molding sand is generally made of casting sand, molding sand binder and auxiliary additives and other molding materials mixed in a certain proportion. Natural silica sand containing clay can also be used. Usually, it is used for aluminum casting. In the molding sand formula, the particle size of the molding sand is too large or too small, and the diameter of the molding sand is too large. Although the air permeability is good, the surface of the aluminum sand parts is rough and the finish is not good. The diameter of the molding sand is too small, resulting in poor air permeability of the sand mold. Aluminum castings have good porosity. Molding sand can be divided into clay sand, water glass sand, cement sand, resin sand, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C1/02
Inventor 孙修财
Owner 繁昌县琦祥铸造厂普通合伙
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