Resin Sand Casting

What Is Resin Sand Casting

Resin Sand Casting process is a kind of floor molding process by using the resin sand as the molding material. Resin sand is a kind of mixture of quartz sand and resin. After mixing and buring, the resin sand could become very hard and solid, so we called it as the hard mold. The iron casting made by resin sand will be usually called as resin sand casting.

Since resin sand mold is very hard and solid, and it has smooth surfaces, so the resin sand casting has more accurate dimensions and better surface smoothness, and less sand residual and casting defects on the surfaces and inside.

What Metal We Cast

Grey Iron: HT150, HT200, HT250; EN-GJL-100, EN-GJL-150, EN-GJL-200, EN-GJL-250, EN-GJL-300; GG15, GG20, GG25, GG30

Ductile Cast Iron:GGG40, GGG45, GGG50, GGG60, GGG70, GGG80; EN-GJS-400-10, EN-GJS-40-15, EN-GJS-40-18, EN-GJS-500-7, EN-GJS-600-3, EN-GJS-700-2, EN-GJS-800-2; QT400-18, QT450-10, QT500-7, QT600-3, QT700-2, QT800-2  

Grey Iron Sand Castings 

How We Inspect The Sand Casting

Our ARL360 Spectrometer checks 20 chemical elements and metallurgical microscope products high-resolution images 1,000 times magnified, Hengchang has a full range of inspection capabilities in house, which include:

1) Spectrographic and manual quantitative analysis

2) Metallographic analysis

3) Brinell, Rockwell hardness inspection

4) Mechanical property analysis

Chemical Composition Test

 Step For Sand Casting Process

1)Making Pattern

Patterns are made of wood or aluminium .Generally, the costs of the aluminium patterns will be the highest, but it is the most suitable if the parts need thousands quantity with higher dimensional tolerance and better surface quality.

2)Molding Process

The sand will be mixed by the treatment equipment, then shoot into the sand boxes. The workers will make sure the sand can be filled to all positions, and make the sand as solid as possible.

3)Self-Hardening of Resin Sand Mold

After molding by workers, the sand is still loose. Then, the sand mold will be coated by a type of alcohols based coating, after buring, the resin sand mold become very solid. So the process is called as hard mold casting process.

4)Meltting and Pouring

Medium frequency eletrical furnaces are used to melt scrap irons for resin sand casting prrocess

5)Sand Blasting,Cleaning and Cutting gate system

The shot blasting process is to remove the sand and oxides, then cut off the gating systems, and grind the gating position, flash, parting lines. Finally, the rough casting is ready. If need seconday processes like surface treatment or machining. The parts will be sent to the next workshops.

Resin sand casting workshop