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Aluminum Die Cast Plating Heat Sink Backplate

Aluminum Die Cast Plating Heat Sink

  • Die Casting Machine Cold Chamber Alum Die Cast Machine 500T
  • Die Casting Method Precision Die Casting
  • Application communication transmitter, base station
  • Machining CNC Machining
  • Material HH33GR
  • Surface Cleaning + Leather Coating
  • Certification ISO 9001:2015
  • Capacity 500000 Pieces/Year
  • Transport Package Wooden Pallet
  • HS Code 7616991090
  • Origin Dong Guan of China
  • Shipment By airmail or by Sea
  • Due-date Two month


1, Aluminum die casting

Equipment: 500T aluminum die casting machine, Material: HH33GR

Process characteristics
a. Furnace temperature: 670°±20°, Material handle: 20±2MM;
b. Secondary materials cannot be used;
c. Test the material composition to confirm that it is OK and can be produced;
d. First piece confirmation is required after die-casting.


a. The filling quality of the surface needs to be confirmed. No cold insulation, no bulging, or lack of material for the pillars. 
b. Pay attention to the surface to avoid sticking molds, drawing molds, or poor ejector pin convexity. 
c. 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.

2, Remove spout (Saw spout and knock out slag bag)

Equipment : hydraulic presses


a. Pay attention to the surface without crushing or shortage of materials.
b. Control the appearance and size.

3,  IPQC inspection

Test tool: Caliper, projection, three-dimensional, visual inspection of appearance.


Use measuring tools correctly and check dimensions according to drawings.


Back shaping

Equipmen : Cutting edge ruler, shaping tooling, hydraulic presses 


Within 0.3mm of the front plane of the product

5, IPQC inspection

Visual inspection of appearance

6, CNC
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


a. Do not overcut, missed processing;                                   
b. Surface attention must not be bruised, burrs; and                                   
c. Ensure that the surface finish Ra0.8, size, shape and location tolerances.

7,100% material inspection

Visual inspection of appearance


a. The surface of the product should not be overcut, sand holes, lack of material. Burrs, and other undesirable phenomena 
b. go-no go fixed gauges inspection 
c. Test the flatness of the product according to the drawing. d. Hold the product lightly to prevent deformation.

Chamfering R-angle, deburring, thimble shaving on non-machined surfaces, polishing and smoothing the shape

Equipment: Air grinder, 120# sandpaper


Do not miss the processing, no sharp corners, burrs removed cleanly, connected to the R angle of the smooth.

9,IPQC inspection:

Visual inspection of appearance

10, Chemical conversion membrane


a. No different colors, no dirty, not touching and scratching;
b. Color according to the sample, uniform and consistent.

11, IPQC inspection + Special Characteristics Inspection
Visual inspection of appearance


a. Surface quality confirmation after coating;
b. Hole need to needle gauge sampling, go -no go fixed gauges inspection.

12, Full inspection of appearance + packaging
Comprehensive inspection of products and packaging
Equipment :
cartons, dividers, bubble wrap, desiccant

a,The appearance shall be inspected according to the sample. The surface shall be free of dirt, scratches, dents and defects, and the glue dispensing shall be even and without defects!
b,The tooth pattern must comply with the go – no go fixed gauge inspection;
c,The product is placed in the knife card, covered with white rice paper on the upper layer, and then packaged.

13, FQC inspection

Test Tools: Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection.


Whether the measuring tool is within the calibration period.

14, Shipping


a. make sure the quantity is the same as order.
b. Label and stamp on the outer box
c. Provide a shipping report.

15, OQC shipping inspection

Test Tools: Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection


Whether the measuring tool is within the calibration period. Whether it is consistent with SIP requirements and customer requirements.