Preparation method of integral resin bonded sand mould

Abstract

The invention discloses a method for preparing an integral resin sand mold, which is obtained by mixing prepared quartz sand, furan resin and hardener in corresponding proportions, pouring them into a mold and standing for molding, and is used for casting to produce fused zirconium corundum bricks. The beneficial effect is that this kind of sand mold has strong integrity, so the dimensional deformation is small, the manufacturing cost is low, the air permeability is good, and the gas in the sand mold is convenient to discharge during casting, so the shape and dimension deformation of the fused zirconia corundum brick body after casting is small, and the inside of the brick body High density, low porosity, high qualified rate of products, brick size and internal quality are better than sodium silicate sand mold; the production of rough bricks requires less grinding parts, which reduces processing costs, reduces product costs, and improves production efficiency. The method has economic benefits, the preparation method is simple to operate, and can be produced in large quantities.

Description

technical field

[0001] The invention belongs to the technical field of casting, and in particular relates to a method for preparing an integral resin sand mold. Background technique

[0002] At present, the sand molds used by domestic manufacturers of fused zirconia corundum bricks are mostly combined water glass sand molds. When casting with such sand molds, it is easy to cause defects such as large deformation of the brick body and low internal density, and the product qualification rate is low. In addition, the fused zirconia corundum bricks qualified by casting are rough bricks, which need to be ground and processed, and can only be delivered to customers after the surface reaches a certain level of smoothness. The parts that need to be processed have a large amount of grinding, which increases the cost of grinding and processing, and the manufacturing cost is high. Contents of the invention

[0003] In order to overcome the above-mentioned technical problems exis...

Examples

Embodiment

[0011] (1) Material selection: 96 parts of quartz sand, 3.3 parts of furan resin, 0.7 parts of hardener, the quartz sand is made of quartz sand with a silica content greater than 95.5% and a particle size of 50-80 mesh;

[0012] (2) Mixing Add quartz sand, furan resin and hardener into the mixer in proportion, stir, grind evenly, and set aside;

[0013] (3) Molding: Pour the spare mixture into the mold, let it stand for molding at room temperature, and dry it naturally. If it is urgent for production, the sand mold can also be dried with the help of a microwave dryer.

technical field

[0001] The invention belongs to the technical field of casting, and in particular relates to a method for preparing an integral resin sand mold. Background technique

[0002] At present, the sand molds used by domestic manufacturers of fused zirconia corundum bricks are mostly combined water glass sand molds. When casting with such sand molds, it is easy to cause defects such as large deformation of the brick body and low internal density, and the product qualification rate is low. In addition, the fused zirconia corundum bricks qualified by casting are rough bricks, which need to be ground and processed, and can only be delivered to customers after the surface reaches a certain level of smoothness. The parts that need to be processed have a large amount of grinding, which increases the cost of grinding and processing, and the manufacturing cost is high. Contents of the invention

[0003] In order to overcome the above-mentioned technical problems exis...

Examples

Embodiment

[0011] (1) Material selection: 96 parts of quartz sand, 3.3 parts of furan resin, 0.7 parts of hardener, the quartz sand is made of quartz sand with a silica content greater than 95.5% and a particle size of 50-80 mesh;

[0012] (2) Mixing Add quartz sand, furan resin and hardener into the mixer in proportion, stir, grind evenly, and set aside;

[0013] (3) Molding: Pour the spare mixture into the mold, let it stand for molding at room temperature, and dry it naturally. If it is urgent for production, the sand mold can also be dried with the help of a microwave dryer.