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Do you know Reinforced Reaction Injection Molding?

Source: Honkia Prototype   Published: 2016-05-20   Views: 414

Generally speaking, the raw materials used in Reinforced Reaction Injection Moldin process include resin and reinforcing material. The most often used material of resin is polyurethane, unsaturated polyester resins and epoxy resins. The polyurethane is most common used in plastic parts of car. In order to improve the adhesion strength of these reinforcing materials, we need to take enhance coupling to treat the surface.

After adding a certain proportion of reinforcing material, the viscosity of the raw material is greatly improved as well wear resistance. If high-pressure metering pump is used for processing, it is likely to damage it in a very short period of time. Usually, we need to use hardened metering cylinder and the mixing head also need to be specially hardened.

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In order to improve the fluidity of the raw material and improve the filling performance of the product, we can add a certain proportion of the compressed gas, such as nitrogen, carbon dioxide, or air to the raw material. So that the material can use the gas pressure to fill the mold after being injected into the mold. Finally, we will get higher quality products.

Compared to conventional RIM process, RRIM molding tends to have a higher internal molding pressure. In order to ensure the life of the mold, Reinforced Reaction Injection Molding material must have a high hardness.

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