Standard pre‑delivery acceptance test confirms new‑built mold performance before shipment. Assembly inspection, dimensional verification, thermal‑balance trial‑test and defect statistics form complete procedure for LPDC, gravity and CPC counter‑pressure casting mold acceptance.
First‑step acceptance: full assembly check. Verify insert mating flatness, bolt torque, vent‑slot clearance and cooling‑circuit connection. Mis‑assembly will produce persistent flash, air‑suction or cooling failure after arriving at customer foundry for EV structural‑part mold.
Cooling‑circuit pressure‑tightness test: hold 0.8 MPa water pressure for 30 minutes with zero leakage as qualified standard. Any tiny leak point shall be fixed; hidden leakage causes rusting and local over‑heating risk for gravity casting mold inserts.
CMM dimensional inspection is executed under mold cold‑state (20±2 ℃ environment). Inspect cavity contour, vent‑slot dimension, cooling‑hole position and assembly reference; minimum 8 measuring points on core‑cavity mating‑face for large‑size LPDC casting mold.
Carry‑out thermal‑balance trial‑test: run at least 25 continuous valid casting shots. Skip early unstable startup pieces; collect data after mold reaches stable thermal state to reflect real mass‑production performance for CPC counter‑pressure casting mold.
During trial‑test phase, record complete parameters: mold pre‑heat temperature, pouring temperature, cycle‑time, pressure curve (for CPC), cooling‑circuit flow and inlet‑outlet temperature difference. All data shall be attached within pre‑delivery acceptance report.
Defect statistical requirement: count flash, porosity, cold‑shut and sticking rate among stable‑phase casting samples. Defect root‑cause analysis must be attached; if mold‑structural defect exists, perform modification and repeat trial‑test for aluminum wheel casting mold.
Sample casting parts from stable thermal‑balance stage for dimensional measurement. At least 6 assembly‑relevant measuring points per sample; judge whether casting dimension stays within drawing tolerance range for EV structural‑part mold acceptance.
Disassemble mold after finishing trial‑test series. Inspect insert surface condition: scratch, chipping, early micro‑crack, nitriding‑layer peeling. Any surface damage found before shipment shall be repaired completely for LPDC casting mold.
Collect and archive full set of deliverable technical documents: material certificate, heat‑treatment report, nitriding‑inspection report, Procast CAE data, CMM report, trial‑test record, 2D‑drawings and 3D neutral‑format assembly model.
Functional test for auxiliary components: verify heating system, sensor feedback and robot‑spray interference check. Auxiliary‑component malfunction often delays commissioning progress after mold arrives at overseas foundry for CPC counter‑pressure casting mold project.
Conditional acceptance rule: if minor non‑conformities cannot be fully solved before shipment, clearly document non‑conformity items, corrective‑action plan and deadline. Unconditional acceptance is forbidden when critical mold‑structure defect exists for gravity casting mold.
FAQ
Q: What pressure‑holding parameter for mold cooling‑circuit leak‑test before delivery?
A: 0.8 MPa hold for 30 min; zero‑leak is qualified acceptance criterion.
Q: Under what environmental condition shall cold‑state CMM dimensional inspection be performed?
A: 20±2 ℃ ambient temperature to eliminate thermal‑expansion measurement error.
Q: What minimum quantity of continuous valid shots for mold pre‑delivery thermal‑balance trial‑test?
A: At least 25 valid shots after mold achieves stable thermal status.
Q: What key curve must be recorded for CPC counter‑pressure casting mold trial‑test acceptance?
A: Complete pressure‑rise curve of counter‑pressure filling process.
Q: How many dimension‑measuring points are required for each stable‑phase casting sample?
A: Minimum 6 assembly‑relevant measuring points for casting tolerance evaluation.
Q: What inspection work shall be completed after finishing pre‑delivery trial‑test shots?
A: Disassemble mold and inspect inserts for scratch, chipping and early micro‑crack signs.
Q: How should non‑critical non‑conformities be handled during pre‑delivery acceptance?
A: Adopt conditional acceptance with documented corrective‑action items and clear deadline.
