What is the difference between resin sand and coated sand

Resin sand can be divided into several types: ordinary resin sand, washed resin sand, and washed resin sand. Due to the low mud content in the washed sand, it can reduce the waste of resin sand and should be prioritized. Next, choose washed resin sand, but never use untreated raw sand. When choosing tree sand, it is important to follow the principle of nearby selection, which can reduce expensive shipping costs and supply resin sand without affecting production. Secondly, it is advisable to choose raw sand with a low angular coefficient. At the same time, due to the different technical and equipment levels of each scrubbing sand production enterprise, the quality of the scrubbing sand produced is also different. Therefore, if conditions permit, when determining the use of resin sand, the scrubbing sand production enterprise should be inspected to examine its technical condition, equipment condition, and sand source condition, and to discover the sand quality control results of the other party. In short, in the process of selecting resin sand raw sand, by comparing experiments and referring to other issues, the production cost of resin sand can be reduced under the premise of production and quality.

Coated sand is a term that refers to sand or core sand with a solidified resin film covering the surface of the sand particles before molding. There are two types of film coating processes: cold method uses ethanol to dissolve the resin, and during the sand mixing process, Urotropin is added to coat the surface of the sand particles. The ethanol evaporates to obtain film coated sand; Preheat the sand using the hot method, add resin to melt it, stir to coat the surface of the sand with resin, add an aqueous solution of Urotropin and lubricant, cool, crush, and sieve to obtain coated sand. Used for cast steel and iron parts.

Resin sand is a particle made of thermoplastic acrylic or polymeric thermosetting amine, with angular particle design, providing a treatment method for most dry strip surface coatings. Plastic tools are chemically inert, and through proper use and recycling, this dry strip method can reduce waste generation and minimize environmental pollution.