Model No.: 118
Type: Muffler Assembly, Windscreen Wiper System
Muffler Type: Rear Muffler
Surface Finish: Electrophoresis Coating, Polishing
Cavity Number: 1
Packaging: carton, PE pallet
Place of Origin: NINGBO
Supply Ability: 30000/MONTH
HS Code: 7616991090
Aluminium Alloy Die Casting Auto Engine Parts for Machine, the part is a housing for Auto engine system which is applied to bus, the part is a cover.In die casting process. shrinkage is a serious problem. should be careful.
The part has request on surface finish of E-Coating to satisfy the daily application, so the density of the part is important item to control, in engineering's work instruction, the operator should fracture the part and look into the section of the fracture to see if the particles is good and dense prior to production, ensure there is no big single porosity or a lot of continuous small porosity, or while e-coating, during process of curing in over under 170-200 degree temperature, the porosity existing internal will expand to get out, leading to big cosmetic issues on this part, such as bubble, pits etc.
The reason for shrinkage is that the liquid density of most casting metals is slightly lower than that of solid density. This means that the volume of the metal decreases during the curing process. As long as the liquid metal can enter the casting before curing, it will minimize the shrinkage phenomenon.
Unfortunately, because of the many different cross-sections of the casting, the "die hot spot" is inevitable. This part of the casting remains liquid after the other part is solidified, so it shrinks when solidified. The best way to solve the shrinkage problem is to improve the design of cavity, strengthening pressure and metal temperature.
Cavity Number: 1
Process Technology: High pressure die casting, Cold Chamber
Product Dimensions: Customized
Casting General Tolerance: Grade GB-CT4
Surface Finish: Polishing, Nyloy polishing the second time
Flow Processes: Die casting, Degate, De-slag, Deburr to remove the flash around the ejector pins, Polishing to remove the parting line, Nyloy polish to make the part have more beautiful appearance, High Precision CNC Lathe Machining in two times, E-coating, Cleaning, Packaging, Inland Shipping to the port as the trad term is FOB NINGBO
Control Measure: Incoming Material Test, First Article inspection, Routing inspection, Final item inspection, and Outgoing quality control
Inspection Equipment: CMM, Caliper, Plug Gage, Screw Gauge
Application: Auto Parts
Lead Time: 30-35 days
Trade Term: FOB Ningbo
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