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Aluminum Die Cast Digital Chassis Back Panel Heat Sink

Digital Chassis Back Panel Heat Sink

  • Die Casting Machine Cold Chamber Alum Die Cast Machine 1250T
  • Die Casting Method Precision Die Casting
  • Application communication transmitter, base station
  • Machining CNC Machining
  • Material ADC12
  • Surface Cleanning + Chemical Conversion Membrane + Power spraying
  • 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

Process

1, Aluminum die casting

Equipment: 1250T aluminum die casting machine, Material: ADC12

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.

Precautions:

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

Precautions:

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.

Precautions:

Use measuring tools correctly and check dimensions according to drawings.

4, SHAPING

Back shaping

Equipmen : Cutting edge ruler, shaping tooling, hydraulic presses 

Precautions:

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

Precautions: 

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, Air tightness testing
Test pressure value in 20kpa ~ 30kpa, stabilized pressure 20 seconds, test time 10 seconds, leakage control within 0.3kpa
Equipment : Airtight Tooling, Airtightness Test Equipment

Precautions: 

a. Do a good job on the product appearance surface protection, sealing groove parts without implementation of touch scratch;
b. Discover the phenomenon of air leakage in time to pick out the marking.

8,100% material inspection

Visual inspection of appearance

Note:

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.
9,Grinding

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

Equipment: Air grinder, 120# sandpaper

Note:

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

10,IPQC inspection:

Visual inspection of appearance

11, cLEANNING + Chemical conversion membrane + POWER SPRAYING

Precautions: 

a. No different colors, dirty, not touching and scratching  
b. Color according to the sample, uniform and consistent;
c. Powder thickness is uniform, no accumulation of tumors, no exposed bottom;

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

Precautions: 

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

13, Riveting and pressing D4.7 dowels
Equipment: Pressure riveting jig, hydraulic press
Note:

a. Check that the pins are loaded without deviation or falling off, and that there is no bulge or pressure injury on the surface of the product;
b. Check the height dimension after pressure riveting.



14, Full inspection of appearance + packaging
Note:

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, and then packaged.



15, FQC inspection

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

Precautions:

Whether the measuring tool is within the calibration period.

16, Shipping

Precautions: 

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

17, OQC shipping inspection

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

Precautions:

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