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China OEM Suppliers for A383 Aluminum Die-Casting Heat Radiator Backplate – High-Quality Factory Products
Process
01
Aluminum die casting
Machine & Material: 280T aluminum die casting machine; Material: ADC12 (US-383/Russia-AJ16/ German-AlSi8Cu3/UK-LM2/Italy-4520/Eu-ENAC-46400)
Process characteristics:
- Furnace temperature: 640°±20°, Material handle: 20±2MM;
- Secondary materials cannot be used;
- Test the material composition to confirm that it is OK before be produced;
- First piece confirmation is required.
Note:
- Confirm the filling quality of the surface. No cold insulation, no bulging, or lack of material for the pillars.
- Pay attention to the surface to avoid sticking molds, drawing molds, or poor ejector pin convexity.
- The ejector pins are concave by 0-0.2mm for non-machine-added surfaces and 0-0.2mm for machine-added surfaces. The thimble needs to be convex 0-0.2mm.
02
Take out the nozzle (saw nozzle) and pull out the slag bag
Tools: Wooden Stick
Things to note:
- Pay attention to the surface and don't damage it or use insufficient material.
- Manage size and appearance.
03
IPQC inspection
Testing instruments: three-dimensional, appearance visual evaluation, projection, calculator
Precautions:
Please take the following precautions: Check dimensions against drawings and use accurate measuring equipment.
04
Grinding
Removal of mold line fringes, surface particles, slag packs and sprue residues.
Equipment: Air grinder, 120# sandpaper
Note:
Do not miss machining, no sharp corners, burr removal clean, mold line connection smooth.
05
Drilling
Drill a hole through one wall D3.5+0.15/-0 on each side face.
Equipment: Small drilling machines, specialized jigs
Note:
- Do not overcut, missed processing;
- Surface attention must not be bruised, burrs;
- Ensure that the surface finish Ra0.8, size, shape and location tolerances.
06
Sand Blasting
The surface of the product is sprayed with 80# brown corundum sand.
Equipment: sand blasting machines
Note:
Spray the inner cavity surface first, and then spray the heat dissipation tooth surface; pay attention to the large plane on the heat dissipation tooth surface after sandblasting does not allow scratches, leakage of spraying, cold lines!
07
Shaping
Backside shaping
Equipment: knife-edge ruler, shaping jig
Note:
Backside plane within 0.15mm
08
Electrophoresis
Surface finishing via electrophoresis process.
Note:
- The coloring area is obvious, without different color, dirt, exposed bottom, accumulated paint, bubbles, touching and scratching;
- Color according to the sample, uniform and consistent.
09
IPQC inspection
Equipment: Appearance visual inspection + film thickness meter + colorimeter + salt spray tester + hundred grid test tool + alcohol resistance test + pencil test
Note:
- Confirmation of surface quality after electrophoresis;
- Go-no go fixed gauges inspection, tooth hole through stop gauge detection.
10
Full material inspection
Visual inspection of appearance
Note:
- The surface should not be overcut, sand holes, lack of material, burrs, and other undesirable phenomena;
- GO - NO GO FIXED GAUGES inspection;
- Test the flatness of the product according to the drawing;
- Hold the product lightly to prevent deformation.
11
Shaping (Backside shaping)
Equipment: knife-edge ruler, shaping jig
Note:
Backside plane within 0.2mm
12
Full inspection of appearance + packaging
Comprehensive inspection of visual quality and secure packaging.
Note:
- The electrophoresis surface is free of different color, dirt, exposed bottom, accumulated paint, bubbles, touching and scratching;
- The color is uniform and consistent according to the sample;
- The through-hole should be in accordance with the inspection of through-hole gauge;
- The product is put into the knife card, and the upper layer is covered with flat cardboard and then packed into boxes.
13
FQC exam
Test Tools: Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection
Note:
Whether the measuring tool is within the calibration period.
14
SHIPPING
Final dispatch and logistical processing.
Note:
- Confirm that the quantity matches the order;
- Label and stamp the outer box;
- Provide a shipping report.
15
OQC shipping inspection
Testing instruments: calipers, projectors, pin gauges, tooth gauges, outer packaging inspection, etc.
Note:
If the measuring device is still within its calibration window. Whether it meets both customer and SIP requirements.
Frequently Asked Questions (FAQ)
What alloy material is used in the aluminum die casting process?
The process utilizes ADC12 material, which is equivalent to US-383, Russia-AJ16, German-AlSi8Cu3, UK-LM2, Italy-4520, and Eu-ENAC-46400, processed using a 280T aluminum die casting machine.
What are the temperature and material requirements for the die casting furnace?
The furnace temperature must be maintained strictly at 640°±20° with a material handle of 20±2MM. Additionally, secondary materials cannot be used, and material composition must be verified before production.
What quality standards apply to the Electrophoresis surface coating?
The color must be uniform and consistent with the sample. The coloring area must be free of color variations, dirt, exposed bottom, accumulated paint, bubbles, touching marks, and scratches.
What flatness specifications must be maintained during shaping?
Flatness is verified using a knife-edge ruler and shaping jig. The backside plane must be within 0.15mm during the initial shaping step and within 0.2mm during the subsequent shaping step.
How are the finished products packaged to prevent damage?
The products are put into a knife card, and the upper layer is covered with flat cardboard before being packed into boxes. Products must be handled lightly to prevent deformation.
What is verified during the OQC and FQC inspections?
Inspectors verify dimensions and tolerances using calipers, projectors, pin gauges, and tooth gauges. They ensure all measuring devices are within their calibration windows and that the outer packaging meets both customer and SIP requirements.