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Hua Xing Manufacturing Co Ltd has been involved in the metal industry over 30 years. Most of the equipments are imported from Taiwan. The plant occupies 6912 square meter located in Shunde, China. Our facility is carefully planned, designed and implemented facility can successfully meet the demand of any quantity from small to large casting parts. Quantity ranges from rapid prototyped from your 3D CAD in one weeks, to any volume of production finished parts from hard tooling in four weeks. Free engineering assistance is offered at every stage of product development to economized design and manufacture. Hua Xing offers superior quality investment castings of low carbon steel & stainless steel.
Investment casting is also known as the lost wax process. This process is one of the oldest manufacturing processes invented by the Egyptians in about 5,000 years ago. Intricate shapes can be made with high accuracy. In addition, metals that are hard to machine or fabricate are good candidates for this process. It can be used to make parts that cannot be produced by normal manufacturing techniques, such as turbine blades that have complex shapes, or airplane parts that have to withstand high temperature.
The types of materials that can cast are aluminum alloys, bronzes, tool steels, stainless steel, satellite, haste alloys, and precious metals. Parts made with investment castings often do not require any further.
 Die casting is a fast, cost-effective manufacturing process for production of high volume, net-shaped, tight tolerance metal components. It has the benefit of increased quality and repeatability, often at lower costs compared to other processes. The die casting process is the injection under high pressure into a steel mould (or tool) of a molten metal alloy, which solidifies rapidly (from milliseconds to a few seconds) to form a net shaped component and is then automatically extracted. The die casting tool will typically produce any number of components from hundreds of thousands to millions, before requiring replacement.
Size Range: Not normally over 0.60 square meter.
Part Weights: .upto 4.5 kgs.
Setup Cost: 100% payment in advance for tooling setup with free first article report.
Die Casting Tolerance:
- Aluminum die cast parts ± .05mm.
- Add ± .025mm to ±.38mm across parting line depending on size.
- Surface Finish: 32-63RMS.
- Minimum Draft Requirements: Aluminum 1° to 3°.
- Minimum Section Thickness: 1.52mm small parts, 2.30mm medium parts.
- Ordering Quantities: Usually 1,000 and up but sometimes as few as a hundred.
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Normal lead time:
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Tooling: Sometimes as little as 4 weeks or as much as 12 weeks.
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Samples: Usually the week the die is available.
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Production: Starts usually within two weeks (sometimes less) after approval.
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Gravity castings are named as permanent mold castings typically used for high-volume production of small, simple metal parts with uniform wall thickness. Hua Xing usually cast aluminum alloys or copper alloys. the common gravity castings parts include gears housings, pipe fittings and wheels.
A product produced from a mold made from metal, the mold is pre-heated to around 300-500°F (150-260°C) to allow better metal flow. The steel cavities coated with ceramic before processing to allow easy removal of the work piece and promote longer tool life. Liquid metal is poured into the cavity of the permanent mold and allowed to solidify. Once the metal has solidified the part is extracted from the mold. The permanent mold is then closed and the cycle starts again.
Gravity die casting tolerances:
0 to 50 ± 0.20mm
50 to 100 ± 0.30mm
100 to 150 ± 0.40mm
150 to 200 ± 0.50mm
200 or above are depends on the product design
Sand casting is used to make large parts (typically Iron, but also Bronze, Brass, Aluminum). It is the process where moist bonded or resin coated sand is firmly packed around a wood or metal pattern of the item(s) to be made. The wood and/or metal pattern is then removed and the resulting cavity is filled with the molten metal. Once the cavity is filled the mold undergoes air drying. The mold (s) are then removed to be cut from the gate and runner as individual pieces.
These guidelines of sand casting tolerances apply as a general rule for the mold removed by hand. Closer tolerance can be obtained depending on part design or the use of special procedures or secondary operations such as machining which can increase the cost of the casting and the need for longer production times.
Linear Tolerance: For all functional dimensions the linear tolerance chart below, should be used. For non-functional dimensions, wider casting tolerance will result in a more economical design.
METRIC - Millimeters |
Range |
Deviation + or - |
Tolerance Range |
up to 10mm |
+/- 1.40 |
2.80 |
10 - 16mm |
+/- 1.50 |
3.00 |
16 - 25mm |
+/- 1.60 |
3.20 |
25 - 40mm |
+/- 1.80 |
3.60 |
40 - 63mm |
+/- 2.00 |
4.00 |
63 - 100mm |
+/- 2.20 |
4.40 |
100 - 160mm |
+/- 2.50 |
5.00 |
160 - 250mm |
+/- 2.80 |
5.60 |
250 - 400mm |
+/- 3.10 |
6.20 |
1400 - 630mm |
+/- 3.50 |
7.00 |
630 - 1000mm |
+/- 4.00 |
8.00 |
Metal stamping is done with hard tooling. This type of tooling is used to make high volume parts. Metal stamping is the forming of metals using machine press or stamping press, blanking, embossing, bending, flanging, and coining by pressure into the surface of the metal. This could be a single stage operation where every stroke of the press produce the desired form on the sheet metal parts, or could occur through a series of stages. Hua Xing equipped with both mechanical presses and hydraulic presses. Our goal is to offer the synergistic ability of being able to combine the necessary metal stamping processes with other in-house capabilities such as rolling sheet metal, deep drawing, welding, and machining to meet our customer metal forming requirements.
Powder Metallurgy (P/M) process with a controlled amount of metal powder mixture is place into a die cavity and pressed under pressure into desired shape called " Parts". This Parts has sufficient strength for further processing.
For our conventional sintering, the parts are placed on a continuous mesh belt. The belt slowly advances through the deluding, high heat and cooling zones of the furnace. The sintering process converts the compacted mechanical bonds between the powder particles into metallurgical bonds.
Rapid cooling of higher alloy materials can be used to eliminate standard heat treating techniques. Tempering is still required to relieve internal stresses.
Some parts are used in the as-sintered condition but many are subjected to secondary operations such as sizing, tumbling, heat treatment, plating or machining.
Precision Machining - Hua Xing machining shop specialized in precision machining. Our machine shop features with high precision CNC turning and milling machine. We offering a full range of CNC machining services for a variety of metals included stainless steel, copper and aluminum. Our vast experience in the manufacturing field enables us to deliver your product with a high quality standard at an economic price.
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