Motorcycle plastic spare parts mould

1. Mold Design

• Product Analysis: Define parting lines, draft angles (1°–3°), wall thickness (2–3 mm) based on 3D models.

• Structural Design: Includes gating system (cold/hot runner), ejection mechanism (ejector pins/lifters), cooling system (conformal channels).

• Material Selection: Core/cavity often use P20, NAK80, or S136 steel; mold base uses standard #45 steel or alloy steel.

Key Tools:

• Design Software: UG/NX, CATIA, AutoCAD

• Flow Analysis: Moldflow (validates filling, warpage, air traps)

2. Mold Machining

(1) Mold Base Machining

• CNC Milling: Processes guide pin holes, ejector pin holes, etc.

• Precision Grinding: Ensures flatness ≤0.02 mm.

(2) Core & Cavity Machining

• Rough Machining: High-speed milling (HSM) for bulk material removal.

• Finish Machining:

  • EDM (Electrode Discharge Machining): For complex surfaces/deep grooves (e.g., textured areas).

  • 5-Axis CNC: High-precision forming (±0.01 mm tolerance).

• Polishing: Mirror polish (Ra≤0.05 μm) or texture etching (VDI3400 standard).

Key Equipment:

• CNC machining centers, EDM machines, wire-cut (WEDM).

3. Mold Assembly

• Component Integration: Install core/cavity, ejector pins, sliders, guide pillars into the mold base.

• Fit Testing:

  • Verify smooth movement of sliders/lifters (clearance 0.02–0.05 mm).

  • Test cooling channel sealing (pressure test at 0.6 MPa).

Critical Checks:

• Use Prussian blue to inspect parting surface alignment.

• Simulate ejection system dynamics (avoid interference).

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