Resin casting molding sand and preparation method thereof

Abstract

The invention discloses resin casting molding sand and a preparation method thereof. The method mainly comprises: performing dry mixing of component raw materials including quartz sand, straw ash, tung oil, asbestos, a furan resin, a phenolic resin, kaoline and potassium dichromate by certain weight parts; and adding water, mixing, placing sand after mixing, molding, casting, cooling and separating to obtain a finished product. The preparation method is simple, the formula is reasonable, the cost is low, the production efficiency is high, the surface of the aluminum sand is made smooth by strictly controlling the particle size of the quartz sand, and the breathability is high.

Description

technical field

[0001] The invention relates to resin casting mold sand and a preparation 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, quartz sand, etc. according...

Examples

Embodiment 1

[0011] Example 1: Resin casting molding sand, the weight parts of its raw materials are: 80 parts of quartz sand, 5 parts of straw ash, 3 parts of tung oil, 3 parts of asbestos, 3 parts of furan resin, 1.2 parts of phenolic resin, 0.5 part of kaolin, and 0.05 part of potassium dichromate and moisture 2 parts.

[0012] The preparation method of resin casting molding sand comprises the following steps:

[0013] (1) Pass the quartz sand through a 100-mesh sieve, then mix quartz sand, straw ash, tung oil, asbestos, furan resin, phenolic resin, kaolin and potassium dichromate according to the weight of the raw materials, and dry mix for 10-20 seconds first. Add water and mix for 1-3 minutes, then put sand for 15-25 seconds after mixing;

[0014] (2) Put the mixture obtained in step (1) into a sand storage bucket, mold, cast and cool for 1-1.5 hours, and separate to obtain the finished product.

Embodiment 2

[0015] Example 2: Resin casting molding sand, the weight parts of its raw materials are: 85 parts of quartz sand, 10 parts of straw ash, 4 parts of tung oil, 4 parts of asbestos, 4 parts of furan resin, 1.5 parts of phenolic resin, 1 part of kaolin, 0.08 parts of potassium dichromate And moisture 3.5 parts.

[0016] The preparation method of resin casting molding sand comprises the following steps:

[0017] (1) Pass the quartz sand through a 100-mesh sieve, then mix quartz sand, straw ash, tung oil, asbestos, furan resin, phenolic resin, kaolin and potassium dichromate according to the weight of the raw materials, and dry mix for 10-20 seconds first. Add water and mix for 1-3 minutes, then put sand for 15-25 seconds after mixing;

[0018] (2) Put the mixture obtained in step (1) into a sand storage bucket, mold, cast and cool for 1-1.5 hours, and separate to obtain the finished product.

Embodiment 3

[0019] Example 3: Resin casting sand, the weight parts of its raw materials are: 90 parts of quartz sand, 15 parts of straw ash, 5 parts of tung oil, 5 parts of asbestos, 5 parts of furan resin, 1.8 parts of phenolic resin, 1.5 parts of kaolin, 0.1 part of potassium dichromate and moisture 5 parts.

[0020] The preparation method of resin casting molding sand comprises the following steps:

[0021] (1) Pass the quartz sand through a 100-mesh sieve, then mix quartz sand, straw ash, tung oil, asbestos, furan resin, phenolic resin, kaolin and potassium dichromate according to the weight of the raw materials, and dry mix for 10-20 seconds first. Add water and mix for 1-3 minutes, then put sand for 15-25 seconds after mixing;

[0022] (2) Put the mixture obtained in step (1) into a sand storage bucket, mold, cast and cool for 1-1.5 hours, and separate to obtain the finished product.

technical field

[0001] The invention relates to resin casting mold sand and a preparation 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, quartz sand, etc. according...

Examples

Embodiment 1

[0011] Example 1: Resin casting molding sand, the weight parts of its raw materials are: 80 parts of quartz sand, 5 parts of straw ash, 3 parts of tung oil, 3 parts of asbestos, 3 parts of furan resin, 1.2 parts of phenolic resin, 0.5 part of kaolin, and 0.05 part of potassium dichromate and moisture 2 parts.

[0012] The preparation method of resin casting molding sand comprises the following steps:

[0013] (1) Pass the quartz sand through a 100-mesh sieve, then mix quartz sand, straw ash, tung oil, asbestos, furan resin, phenolic resin, kaolin and potassium dichromate according to the weight of the raw materials, and dry mix for 10-20 seconds first. Add water and mix for 1-3 minutes, then put sand for 15-25 seconds after mixing;

[0014] (2) Put the mixture obtained in step (1) into a sand storage bucket, mold, cast and cool for 1-1.5 hours, and separate to obtain the finished product.

Embodiment 2

[0015] Example 2: Resin casting molding sand, the weight parts of its raw materials are: 85 parts of quartz sand, 10 parts of straw ash, 4 parts of tung oil, 4 parts of asbestos, 4 parts of furan resin, 1.5 parts of phenolic resin, 1 part of kaolin, 0.08 parts of potassium dichromate And moisture 3.5 parts.

[0016] The preparation method of resin casting molding sand comprises the following steps:

[0017] (1) Pass the quartz sand through a 100-mesh sieve, then mix quartz sand, straw ash, tung oil, asbestos, furan resin, phenolic resin, kaolin and potassium dichromate according to the weight of the raw materials, and dry mix for 10-20 seconds first. Add water and mix for 1-3 minutes, then put sand for 15-25 seconds after mixing;

[0018] (2) Put the mixture obtained in step (1) into a sand storage bucket, mold, cast and cool for 1-1.5 hours, and separate to obtain the finished product.

Embodiment 3

[0019] Example 3: Resin casting sand, the weight parts of its raw materials are: 90 parts of quartz sand, 15 parts of straw ash, 5 parts of tung oil, 5 parts of asbestos, 5 parts of furan resin, 1.8 parts of phenolic resin, 1.5 parts of kaolin, 0.1 part of potassium dichromate and moisture 5 parts.

[0020] The preparation method of resin casting molding sand comprises the following steps:

[0021] (1) Pass the quartz sand through a 100-mesh sieve, then mix quartz sand, straw ash, tung oil, asbestos, furan resin, phenolic resin, kaolin and potassium dichromate according to the weight of the raw materials, and dry mix for 10-20 seconds first. Add water and mix for 1-3 minutes, then put sand for 15-25 seconds after mixing;

[0022] (2) Put the mixture obtained in step (1) into a sand storage bucket, mold, cast and cool for 1-1.5 hours, and separate to obtain the finished product.