High Quality Custom Injection Molded PP Parts

High Quality Custom Injection Molded PP Parts

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Payment Type:	L/C,T/T
Incoterm:	FOB,CIP
Transportation:	Ocean
Port:	Dalian

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Product Description

Product Attributes

Packaging & Delivery

Product Description

Product Attributes

Brand: Jinggong

Place Of Origin: China

Processing Service: Moulding

Plastic Molding Process Type: Injection

Packaging & Delivery

Selling Units	:	Piece/Pieces
Package Type	:	Carton or pallet
Picture Example	:

Product Description

Polyurethane reaction Injection Molding (RIM) is a manufacturing process used to produce high-quality, precision parts from polyurethane materials. This method combines the principles of plastic injection molding with a chemical reaction that occurs during the molding process.

Here's how it works:

1. Pre-mixing: A two-part system of polyol (a base compound) and isocyanate (an activator) is prepared in separate containers. The ratio of these components determines the properties of the final product, such as hardness, flexibility, and thermal stability.

2. Mixing: Before injecting, the two parts are mixed thoroughly in a sealed mold cavity or a mixing head. The mixing process often involves agitation and sometimes a catalyst to control the reaction rate.

3. Injection: The premixed polyurethane mixture is injected under high pressure into the mold cavity. The mold is typically made of steel or aluminum and has a male and female part, which defines the shape of the final part.

4. Chemical reaction: As the material is injected and fills the mold, the isocyanate and polyol react chemically to form polyurethane foam or solid. This reaction is exothermic, generating heat that can be managed by cooling systems in the mold.

5. Curing: After the material has been completely injected and the reaction has reached completion, the mold halves are clamped together to maintain the shape and allow for proper curing. This can take several minutes to hours, depending on the specific formulation and required strength.

6. Ejection and post-processing: Once the part has cured, the mold is opened, and the finished polyurethane part is ejected. Post-processing may include trimming, polishing, or additional treatments like painting or coating, if necessary.

Polyurethane RIM is widely used in industries like automotive, aerospace, construction, and footwear due to its excellent insulation, durability, and versatility in creating custom shapes and designs. The process allows for high-quality, lightweight, and cost-effective production of various polyurethane components.