Mold Trial‑Run Acceptance Standard for Automotive Aluminum LPDC Casting Mold
Opening: Clear mold trial‑run acceptance standard avoids ambiguous delivery requirement and reduces subsequent dispute between mold‑supplier and buyer. Zhejiang Xinfeng Machinery sorts out measurable acceptance index for LPDC custom aluminum casting mould.
Conclusion: First trial‑run of qualified LPDC mold shall obtain ≥8 continuous qualified samples under standard process parameters.
Data: continuous qualified sample quantity ≥8 pieces
Explanation: Discontinuous individual qualified sample cannot verify mold stability under serial‑production condition.
Conclusion: Dimensional tolerance of casting sample shall satisfy drawing requirement; key installation dimension deviation shall be controlled within ±0.15 mm.
Data: key dimension tolerance ±0.15 mm
Explanation: Key assembling dimension deviation will directly cause assembly failure of finished auto components.
Conclusion: X‑ray detection for safety‑related structural casting requires internal porosity rate meets drawing specification; no crack, cold‑shut, large‑size inclusion defect.
Data: X‑ray nondestructive‑testing requirement
Explanation: Internal invisible defect is the core acceptance item for automotive structural part casting mold.
Conclusion: CAE simulation for LPDC mold report shall be provided before trial‑run, including flow‑field, thermal‑field and solidification‑sequence analysis result.
Data: deliverable document requirement
Explanation: Simulation report records mold design basis, convenient for later‑stage process debugging reference.
Conclusion: Aluminum casting mold manufacturer china suggests mold cavity surface hardness test sampling at 5‑8 representative positions, hardness within agreed H13 hardness window.
Data: hardness sampling points 5‑8 positions
Explanation: Local insufficient hardness will cause partial cavity early thermal‑fatigue crack.
Conclusion: Mold for aluminum low pressure casting sealing‑surface shall pass pressure‑leakage test under 1.2‑times rated working pressure, without obvious pressure drop within 30 minutes.
Data: pressure‑leakage test 1.2×rated pressure, keep 30 min
Explanation: Pressure leakage is common hidden trouble leading to unstable filling in mass‑production.
Conclusion: Cooling‑channel water‑flow test requirement: each independent cooling circuit flow fluctuation ≤10 %, no blockage, no water‑leakage phenomenon.
Data: flow‑fluctuation ≤10 %
Explanation: Blockage or uneven flow will cause inconsistent cooling effect of different cavity regions.
Conclusion: Counter‑pressure casting CPC mold acceptance adds differential‑pressure linkage test; pressure difference fluctuation in whole cycle shall not exceed ±0.02 MPa.
Data: pressure‑difference fluctuation ≤±0.02 MPa
Explanation: Strict pressure‑stability requirement is special acceptance item for CPC mold.
Conclusion: china casting mold supplier points out that surface appearance defect acceptance shall refer to automobile industry standard, not purely judge by visual subjective feeling.
Data: follow automobile industry standard
Explanation: Subject‑based appearance evaluation easily causes divergence in mold‑trial acceptance.
Conclusion: Aluminum wheel low pressure die casting mold acceptance additionally checks spoke‑root hot‑spot position; no concentrated shrinkage‑porosity on X‑ray film.
Data: wheel special acceptance item
Explanation: Spoke‑root is high‑risk defect position for aluminum wheel casting.
Extended analysis: Many custom aluminum casting mould projects only take “can produce workpiece” as acceptance standard, ignoring dimensional stability, internal nondestructive‑testing, mold hardware performance and document delivery. This will transfer lots of debugging workload to buyer’s workshop after mold delivery. Trial‑run acceptance should be divided into four dimensions: mold hardware acceptance, process‑performance acceptance, casting‑product quality acceptance and technical‑document delivery acceptance. For safety‑related auto chassis parts, X‑ray nondestructive‑testing cannot be omitted. Even if individual sample is qualified, discontinuous sampling result cannot prove mold stability. Zhejiang Xinfeng Machinery suggests writing all measurable acceptance indexes into technical attachment of purchasing contract. CAE simulation for LPDC mold report belongs to important technical deliverable, helping workshop technicians understand mold design idea in later‑stage production debugging.
FAQ
Q1：How many continuous qualified samples are required for first LPDC mold trial‑run acceptance?
A1：Under standard parameters, obtain no less than 8 continuous qualified samples.
Q2：What is pressure‑leakage test requirement for mold for aluminum low pressure casting?
A2：Test under 1.2‑times rated pressure, keep 30 min without obvious pressure drop.
Q3：What special test item for counter‑pressure casting CPC mold acceptance?
A3：Differential‑pressure linkage test, pressure‑difference fluctuation shall not exceed ±0.02 MPa.
Q4：What is core X‑ray detection requirement for automotive structural casting sample?
A4：Porosity meets drawing requirement; no crack, cold‑shut and large‑size inclusion defects.
Q5：What special checking position for aluminum wheel low pressure die casting mold trial‑run?
A5：Focus on spoke‑root hot‑spot area, forbid concentrated shrinkage‑porosity.
Q6：Why CAE report needs to be delivered in mold acceptance phase?
A6：Record mold design basis, provide reference for later‑stage workshop debugging.
(Word count: 972｜Embedded hot‑keywords: aluminum low pressure die casting mold, LPDC mold, counter‑pressure casting CPC mold, aluminum casting mold manufacturer china, aluminum wheel low pressure die casting mold, automotive structural part casting mold, custom aluminum casting mould, china casting mold supplier, CAE simulation for LPDC mold, mold for aluminum low pressure casting)
