CPVC reduced diameter elbow mold
Specialize in manufacturing all moulds of pipe fitting series: pvc drainage pipe fitting mould, ppr cold and hot water pipe fitting mould, PE pipe fitting mould...
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CPVC reduced diameter elbow mold
Detail
1. Basic structure of mold
Mold cavity design: Accurately machined according to the angle of the elbow (such as 45 °, 90 °) and the reduction ratio (such as DN50 → DN32) to ensure a smooth transition of the flow channel.
Shrinkage section: Adopting a conical or stepped design, gradually reducing the diameter to avoid fluid turbulence.
Splitting line: It is usually a two half mold structure, which is easy to demold. The parting surface needs high-precision processing to prevent burrs.
2. Material selection
Mold steel: commonly used pre hardened or heat-treated steels such as P20 and H13, which are corrosion-resistant and wear-resistant.
Surface treatment: chrome plating or nitriding treatment to improve surface hardness and extend mold life.
3. Production process
Injection molding: CPVC pellets are melted at 180-220 ℃ and injected into the mold, requiring precise temperature control to prevent decomposition.
Cooling system: Built in waterway for rapid cooling, shortening the cycle time (usually 20-60 seconds).
Demoulding mechanism: ejector pin or pneumatic demoulding to avoid deformation.
4. Key parameters
Shrinkage ratio: generally not exceeding 50% (such as DN40 → DN25), to avoid sharp changes that may cause a decrease in strength.
Bending radius: typically 1.5 times the pipe diameter (R=1.5D), in compliance with ANSI/ASME standards.
Wall thickness control: The mold needs to ensure that the minimum wall thickness after diameter reduction is ≥ the standard value (such as SCH80).
5. Quality control
Dimensional inspection: Verify the reduced diameter section and bending angle using calipers and projectors.
Pressure test: The finished product needs to pass a water pressure test (such as 1.5 times the working pressure).
Material certification: Complies with ASTM F441 standard (CPVC fittings).
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103, Building 10, Lecheng Molding Industrial Park, Xinqian Street, Huangyan District, Taizhou city, Zhejiang Province