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China Suppliers Factory OEM Die-Casting Aluminum A383 Heat Radiator Backplate for Efficient Heat Management
Process Workflow
01
Aluminum die casting
Equipment & Material
280T aluminum die casting machine
Material: ADC12 (US-383/Russia-AJ16/German-AlSi8Cu3/UK-LM2/Italy-4520/Eu-ENAC-46400)
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 being 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 & pull out 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
Check dimensions against drawings and use accurate measuring equipment.
04
Grinding
Description
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
Description
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
Description
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
Description
Backside shaping
Equipment
Knife-edge ruler, shaping jig
Note
Backside plane within 0.15mm.
08
Electrophoresis
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
Description
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
Description
Backside shaping
Equipment
Knife-edge ruler, shaping jig
Note
Backside plane within 0.2mm.
12
Full inspection of appearance + 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
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 material and machine specifications are required for the aluminum die casting process?
The process utilizes a 280T aluminum die casting machine. The required material is ADC12, which matches international standards including US-383, Russia-AJ16, German-AlSi8Cu3, UK-LM2, Italy-4520, and Eu-ENAC-46400.
What are the tolerances and specifications for the drilling and shaping operations?
For drilling, a hole of D3.5+0.15/-0 must be drilled through one wall on each side face with a surface finish of Ra0.8. During the shaping stages, the backside plane must be kept within 0.15mm (Step 7) and within 0.2mm (Step 11).
How is the sandblasting process executed and what should be avoided?
The product surface is sprayed with 80# brown corundum sand using sandblasting machines. The inner cavity surface must be sprayed first, followed by the heat dissipation tooth surface. It is critical to ensure no scratches, leakage of spraying, or cold lines on the large plane of the heat dissipation tooth surface.
What quality checks are performed during IPQC and final inspections?
IPQC and final inspections use a range of instruments including calipers, projectors, pin/tooth gauges, film thickness meters, colorimeters, salt spray testers, hundred grid tools, and alcohol resistance tests. These verify that dimensions match drawings, measuring tools are calibrated, and surface quality meets SIP/customer requirements.
What packaging procedures are required before shipping the products?
Products must be put into a knife card, and the upper layer must be covered with flat cardboard before being packed into boxes. This ensures the electrophoresis surface remains free of scratches, dirt, and paint damage during transit.