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Cast Urethane Parts

Shanghai Pepsen has been manufacturing ten thousands of cast urethane parts (or called PU parts, polyurethane parts, PUR parts) with custom hardness, formulations, specifications and colors. We provide various polyurethane solutions no matter it is one piece or one thousand. By using economical or high-performance prepolymer, curatives and additives, Shanghai Pepsen can provide various options for different applications and requirements. 

What is Cast Urethane?

Cast urethane parts usually comes up with master pattern making, silicon mold and pouring urethane. Because of inexpensive tooling cost comparing to injection mold, cast urethane is usually used for small quantity parts or prototype production. Pepsen uses this process for many products such as urethane concrete stamp, PU floor bending, other complicated parts and parts with de-molding issues. Another definition of cast urethane parts(with respect to polyurethane injection process, polyurethane spraying process or polyurethane foaming) means parts made by mixing raw materials and pouring/casting urethane into molds, no matter molds are made of silicon or metal. Cast Urethane Parts are excellent for low-volume manufacturing, marketing samples, pre-production runs, and test prototypes. A great feature of cast urethane parts is the ability to over-mold a different material to an existing part.


Is Cast Urethane Suitable For High Volume Parts?

Comparing to injection molded PU, cast urethane has lower production efficiency. Even if it is produced by casting machine, the curing and de-molding process can only be handled manually. In most cases, it is for pure cast urethane parts have better quality while efficiency is lower. However, it is not necessary to worry about output unless volume is more than ten thousands. Using the SL master, we create a silicone mold for cast urethane. The cast urethane parts material is then injected into the mold and cures into the part.


Advantages of Cast Urethane Parts

Cast urethane is kind of thermoset urethane which has much better physical properties than most of injection molded parts and extruded thermoplastics. It is widely used in application requiring high performance. Besides, you almost do not need any special production facility if you do not care much about high quality products. Besides traditional way of using silicon molds, Pepsen developed more economical molds for cast urethane parts. The way avoids that workers need to have ability of making both urethane and silicon, besides, company does not need to purchase raw materials for two different products.