China Suppliers Factory Prototyping ADC12 Telecom Server Heatsink Enclosure - Aluminum Die Cast Plating Heat Sink
Manufacturing Process
Aluminum Die Casting
Equipment: 500T aluminum die casting machine
Material: HH33GR
Process Characteristics:
• Furnace temperature: 670°±20°
• Material handle: 20±2MM
• Secondary materials cannot be used
• Material composition verification required
• First piece confirmation required after die-casting
Precautions
- Confirm surface filling quality (no cold insulation, no bulging, no lack of material for pillars).
- Avoid sticking molds, drawing molds, or poor ejector pin convexity.
- Ejector pins: concave 0-0.2mm for non-machine-added surfaces and machine-added surfaces. Thimble needs to be convex 0-0.2mm.
Remove Spout
(Saw spout and knock out slag bag)
Equipment: Hydraulic presses
Precautions
- Pay attention to the surface to ensure no crushing or shortage of materials.
- Strictly control the appearance and size.
IPQC Inspection
Test Tools: Caliper, projection, three-dimensional, visual inspection of appearance.
Precautions
- Use measuring tools correctly and check dimensions according to drawings.
Shaping
Process: Back shaping
Equipment: Cutting edge ruler, shaping tooling, hydraulic presses
Precautions
- Within 0.3mm of the front plane of the product.
IPQC Inspection
Visual inspection of appearance.
CNC Machining
Processes: Machining of internal cavity end faces, backside holes, side of one end, hole through-hole.
Equipment: CNC machine, flat-bottomed gong tool, Drill Bit, Tap machining jig.
Precautions
- Do not overcut or miss processing.
- Surface must not be bruised or have burrs.
- Ensure surface finish Ra0.8, and comply with size, shape, and location tolerances.
100% Material Inspection
Visual inspection of appearance.
Notes
- Surface must be free of overcuts, sand holes, lack of material, burrs, and other undesirable defects.
- Perform go-no go fixed gauges inspection.
- Test product flatness according to the drawing.
- Hold the product lightly to prevent deformation.
Grinding
Chamfering R-angle, deburring, thimble shaving on non-machined surfaces, polishing and smoothing the shape.
Equipment: Air grinder, 120# sandpaper
Notes
- Do not miss processing. Ensure no sharp corners, burrs are removed cleanly, and the connection to the R angle is smooth.
IPQC Inspection
Visual inspection of appearance.
Chemical Conversion Membrane
Precautions
- No different colors, no dirty spots, no touching or scratching.
- Color must match the sample, remaining uniform and consistent.
IPQC + Special Characteristics Inspection
Visual inspection of appearance.
Precautions
- Confirm surface quality after coating.
- Holes need needle gauge sampling and go-no go fixed gauges inspection.
Full Inspection & Packaging
Comprehensive inspection of products and packaging.
Equipment: Cartons, dividers, bubble wrap, desiccant.
Precautions
- Inspect appearance according to the sample. The surface must be free of dirt, scratches, dents, and defects. Dispensing must be even.
- Tooth pattern must comply with the go-no go fixed gauge inspection.
- Place the product in the knife card, cover with white rice paper on the upper layer, and package.
FQC Inspection
Test Tools: Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection.
Precautions
- Verify whether the measuring tool is within its calibration period.
Shipping
Precautions
- Make sure the quantity is identical to the order.
- Affix label and stamp on the outer box.
- Provide a shipping report.
OQC Shipping Inspection
Test Tools: Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection.
Precautions
- Verify whether the measuring tool is within the calibration period.
- Ensure consistency with SIP requirements and customer requirements.
Frequently Asked Questions
What are the temperature requirements for the aluminum die casting process?
During the aluminum die casting step, the furnace temperature must be strictly maintained at 670°±20° with a material handle of 20±2MM. Additionally, secondary materials cannot be used.
How do you ensure the precision of the CNC machining phase?
To ensure precision, we prevent overcutting and missed processing, verify that the surface is free of bruises and burrs, and maintain a surface finish of Ra0.8 alongside strict compliance with dimension, shape, and location tolerances.
What standards apply to the chemical conversion membrane step?
The chemical conversion membrane must exhibit no color differences, no dirt, and no surface scratches. The color must be uniform and consistent according to the standard sample.
What packaging precautions are taken for product safety?
Products are placed into a knife card and covered with white rice paper on the upper layer before packaging. The packaging system incorporates cartons, dividers, bubble wrap, and desiccant to prevent damage during transit.
How are quality inspection tools verified?
For FQC, OQC, and other inspection stages, all measuring tools (such as calipers, projection systems, needle gauges, and tooth gauges) must be verified to be within their active calibration period and consistent with SIP and customer requirements.