Magnesium Alloy Low Pressure Die Casting

Compared with other metals, magnesium alloys have a low melting point and a small specific heat, and the energy consumed during regeneration and melting is 4% of the energy consumed in the manufacture of new materials. Recyclable to achieve the quality of the original alloy, but not other materials. In addition, Magnesium alloy low pressure die casting can produce 0.2mm products, which cannot be achieved by other materials. Easy cutting, high work efficiency, small loss to the tool and low cost. Since its establishment in 1997, Qinhuangdao Zhongwei Precision Machinery Co., Ltd. has mainly produced gravity casting, low pressure casting, high pressure casting, investment casting, etc. The company has built a reputation for gold with its excellent quality, making the other shore products quickly famous. at home and abroad. More than 70% of the products are exported to the United Kingdom, Germany, Japan, the United States, Taiwan and other countries and regions.

Product Dsecription

1. Implementation standards: the company strictly implements ISO9001, ISO14001, IATF16949 certification

The products have passed the certification of ROHS, FDA EU, etc.

2. Product material standards: ISO, GB, ASTM, SAE, ISO, EN, DIN, JIS, BS

3. Main processes: die casting process, investment casting, shell casting, deburring, sand blasting, machining, heat treatment, leak testing, surface treatment, etc.

4. Casting available materials:

Tin bronze, silicon bronze, aluminum bronze, brass, red copper, titanium alloy, high manganese steel, high chromium steel, high nickel steel, carbon steel, alloy steel, stainless steel, gray iron, cast iron, cast steel, cast aluminum, etc. Customized according to customer requirements.

Available materials for die casting:

Magnesium alloy low pressure die casting mainly includes Mg-Al-Zn-Mn, Mg-Al-Mn, Mg-Al-Si-Mn alloys.

Product Feature

Low pressure casting can use sand mold, metal mold, graphite mold, etc. The filling process is not only different from gravity casting such as metal mold casting and sand casting, but also different from pressure casting with high pressure and high speed filling, and has the following advantages:

1) Filling with pure metal liquid improves the purity of castings. Since the molten slag generally floats on the surface of the molten metal, the low-pressure casting is filled by the molten metal in the lower part of the crucible through the liquid riser, which completely avoids the possibility of the molten slag entering the mold cavity.

2) The metal liquid filling is stable, which reduces or avoids the churning, impact and splashing of the metal liquid during filling, thereby reducing the formation of oxide slag.

3) The casting has good formability, and the molten metal is filled under the action of pressure, which can improve the fluidity of the molten metal, which is conducive to the formation of castings with clear contours and smooth surfaces, which is more beneficial for the forming of large thin-walled castings.

4) The casting crystallizes and solidifies under the action of pressure, which can be fully fed and the structure of the casting is dense.

5) The yield of molten metal is improved. Generally, no riser is required, and the uncondensed metal in the liquid riser can be returned to the crucible for repeated use, which greatly improves the yield of molten metal. Generally up to 90%,

6) The production operation is convenient, the labor conditions are good, the production efficiency is high, and it is easy to realize mechanization and automation,

Low-pressure casting also has some disadvantages, and the investment in equipment and molds is large; when producing aluminum alloy castings, the crucible and riser are in contact with the molten metal for a long time, which is easily eroded and scrapped, and will also increase the iron in the molten metal and deteriorate its performance.

Post Casting Process

1. Heat treatment: annealing, carbonization, tempering, quenching, normalizing, surface tempering

2. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

3. Surface treatment: powder spraying, chrome plating, painting, sandblasting, nickel plating, galvanizing, blackening, polishing, bluing, etc.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam)

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements

3. Testing equipment: flaw detection, spectrum analyzer, golden image analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine;

4. Provide after-sales service.

5. The quality can be traced back.

Application

Low pressure casting is the earliest anti-gravity casting technology, and it has been used in industrial production since the 1940s. Today, low-pressure casting is mainly used to produce aluminum alloy and magnesium alloy parts, such as automobile wheels in the automotive industry, cylinder blocks of internal combustion engines, cylinder heads, pistons, missile casings, impellers, wind guide wheels and other castings with complex shapes and high quality requirements . When using low pressure casting to produce cast steel, such as cast steel wheels, special refractory materials are required for the riser. Low pressure casting can also be applied to small copper alloy castings, such as pipe fittings, faucets in bathrooms, etc. This technology has been industrialized abroad.

Certicifation