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China Suppliers Aluminum A383 Die Casting 5G RRU Station Base Enclosure - Factory Direct Quality Products
Process
1. Aluminum Die Casting
Equipment & Characteristics
Equipment: 400T aluminum die casting machine
Material: A380
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
Equipment: Wooden Stick / sawing machine / labor protection gloves
Precautions
- a. Pay attention to the surface without crushing or shortage of materials.
- b. Control the appearance and size.
3. IPQC Inspection
Test Tools
Tools: Caliper, projection, three-dimensional, visual inspection of appearance.
Precautions
Use measuring tools correctly and check dimensions according to drawings.
4. Grinding
Process & Equipment
The sharp corners of the product are chamfered, deburred, non-machined ejector pins are sharpened, and polished to smooth the appearance.
Equipment: Wind grinder, 120# sandpaper
Precautions
No processing should be missed, no sharp corners or burrs should be removed, and the R corners should be connected smoothly.
5. Shaping
Equipment
Equipment: Knife-edge ruler, shaping fixture
Precautions
Within 0.25mm of the front plane of the product
6. IPQC Inspection
Inspection Type
Visual inspection of appearance
7. CNC (CNC machining + Deburring + cleaning)
Process & Equipment
CNC machining + Tapping of 2 through holes for M3 teeth
Equipment: Tapping Machines / M3 Taps, Burr knife / Ultrasonic cleaning tank / Air gun
Precautions
- a. Do not over-cut or miss processing;
- b. Be careful not to scratch or burr the surface;
- c. Guaranteed dimensional and form tolerances.
8. Cleaning + Passivation
Process & Equipment
CNC machining + Tapping of 2 through holes for M3 teeth
Equipment: Tapping Machines / M3 Taps, Burr knife / Ultrasonic cleaning tank / Air gun
Precautions
- a. Surface residual water droplets need to be baked clean!
- b. Salt mist test requires 48 hours!
- c. The surface is not allowed to have dirt, oil, color!
9. Laser engraving two O-port location planes
Equipment
Equipment: Laser engraving machine, laser engraving fixture
Note
- a. Check that there can be no burrs, particles, aluminum chips on the edge of the O-shaped orifice;
- b. The plane should be complete laser engraving, and the surface after laser engraving is not allowed to be polluted with oil and black marks!
10. 100% material inspection - Appearance visual inspection
Note
- a. Appearance should be inspected according to the sample, and the surface should be free from dirt, scratches and defects.
- b. The tooth pattern should be in accordance with the checking of through and through rule.
- c. The products are put into the blister tray, covered with white rice paper and then packed into boxes.
11. IPQC inspection
Inspection Type
Visual inspection of appearance
12. Full inspection of appearance + packaging
Details & Equipment
Comprehensive inspection of products and packaging
Equipment: Carton, Knife card, Clapboard, bubble bag
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 pass-and-stop inspection.
- c. The product is placed in the knife card, covered with flat cardboard on the upper layer, and then packaged.
13. FQC inspection
Test Tools
Tools: Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection
Note
Whether the measuring tool is within the calibration period.
14. 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.
15. OQC shipping inspection
Test Tools
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.
Frequently Asked Questions (FAQ)
What materials and equipment are used in the primary die casting process?
We utilize a 400T aluminum die casting machine with A380 material. The furnace temperature is strictly controlled at 670°±20°, and secondary materials are prohibited to ensure maximum structural integrity.
How do you ensure the precision and quality of CNC machined components?
During CNC machining and tapping of the M3 holes, we strictly prevent over-cutting and surface scratches. The process is fully monitored to guarantee exact dimensional and form tolerances, followed by thorough deburring and ultrasonic cleaning.
What are the requirements for the cleaning and passivation process?
After ultrasonic cleaning, all surface residual water droplets must be completely baked dry. The parts must pass a 48-hour salt mist test, and the surfaces must be completely free of dirt, oil, and discoloration.
How do you inspect the laser engraving quality on the O-port location planes?
We ensure the laser engraving on the two O-port location planes is complete. The edges of the O-shaped orifice must be free of burrs, particles, and aluminum chips, and the surface must not be contaminated with oil or black marks.
What measures are taken during final inspection and packaging?
We perform a full inspection of the appearance (ensuring no dirt, scratches, or dents) and verify the tooth pattern using pass-and-stop gauges. The products are safely packed inside knife cards, covered with protective flat cardboard, and placed inside cartons with bubble bags.
How do you verify quality before shipping?
Both FQC and OQC inspections are carried out using calibrated calipers, projections, needle gauges, and tooth gauges. We verify that the shipping quantity matches the order, stamp and label the outer box, and provide a comprehensive shipping report.