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ZHONGYUE MOULD, based in Huangyan, Taizhou—China's Mould Capital - is a professional Plastic Pipe Fitting Mould manufacturer. We design and build high-precision tooling for PVC, PPR, HDPE, and CPVC pipe fittings used in water supply, gas distribution, drainage, and irrigation systems.
Pipe fittings require absolute dimensional accuracy and pressure integrity. Our moulds are engineered to ensure leak-proof joints and long-term reliability in buried or exposed installations.
| Type | Common Examples | Design Focus |
|---|---|---|
| Socket / Spigot Fittings | Coupling, Reducer, End Cap, Nipple | Thread accuracy, internal burr control, sealing ring groove precision |
| Branching Fittings | Tee, Cross, Y-Branch | Uniform wall thickness at junctions, weld line management |
| Directional Fittings | 45°/90° Elbow, Bend | Bending radius control, balanced cooling to prevent ovality |
| Connection Fittings | Male/Female Adaptor, Union | Thread profile precision (BSPT/NPT), easy demolding |
| Valve & Tap Molds | Ball Valve Body, Bib Tap, Check Valve | Complex core pulling (multiple sliders), seat sealing surface flatness |
Pipe fittings cannot tolerate flash on sealing surfaces. We specialize in Valve Gate Hot Runner Systems (YUDO/HASCO). The valve pin closes directly on the part, leaving a clean gate mark and eliminating secondary trimming.
Fittings often have multiple openings. We design robust hydraulic/pneumatic side-actions (sliders) and unscrewing mechanisms for internal threads or complex undercuts, ensuring smooth retraction without damaging threads.
The cylindrical shape of fittings makes core cooling challenging. We utilize Beryllium Copper (BeCu) inserts at the core tip and deep ribs to accelerate heat extraction, preventing deformation (ovality) and reducing cycle time.
We use high-tensile mold steel (S136, 2316) with hardened sliders to withstand high injection pressures (up to 200MPa). MoldFlow analysis ensures no weld lines appear at pressure-critical zones.
| Item | ZHONGYUE Standard |
|---|---|
| Mold Steel | Core/Cavity: S136, 2316 (Stainless), 718H, 2738HH |
| Slider/Side-Action |
Hardened to HRC 48-52 for wear resistance
|
| Cavity | 1×1, 1×2, 2×2, or 4×4 depending on fitting size |
| Runner |
Hot Runner (Valve Gate preferred) or Insulated Cold Runner
|
| Ejection |
Ejector pins + Air-assist for small fittings
|
| Surface Finish |
Polished (SPI A2) for flow optimization
|
| Mold Life |
500,000 – 1,000,000+ shots
|
| Applicable Material |
PVC-U, CPVC, PPR, HDPE, PB, PEX
|
Taizhou Zhongyue Mould Co., Ltd. controls dimensional tolerance on sealing faces, socket depth, and wall uniformity to ensure smooth installation and reliable joint alignment in Plastic Pipe Fitting Mould production.
Flash is usually caused by poor parting line fit or excessive injection pressure. We improve mold clamping precision and optimize parting surface machining to eliminate overflow defects.
Yes. We design molds suitable for low, medium, and high-pressure piping systems by adjusting structural reinforcement and material flow control.
Oval deformation is typically related to uneven cooling or unbalanced cavity filling. We correct this through symmetrical cooling layout and optimized gating systems.
Yes. We design advanced slider and core-pulling mechanisms for fittings with side holes, branches, or complex internal geometries.
We apply hardened steel inserts, precision CNC machining, and strict mold maintenance planning to maintain consistent output quality during long production cycles.
Backed by 50+ team number and 20+ CNC machines, ZHONGYUE provides full DFM reports, MoldFlow analysis, and T1 trial support for your piping projects. Contact us today for a customized quotation on your Pipe Fitting Molds.
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