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Shenzhen Runpeng Precision Hardware Co.,Ltd

The contact:Susan Liao

Mobile:86-18925258235

Phone:86-755-29886925 

Fax:86-755-29886926

E-mail:sales@szrunpeng.cn

Web:www.sz-runpeng.com

Add:Building 69-70, 4th Industrial Zone, Mashantou, Gongming Town,Shenzhen,China.


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Die Casting Metal Forming Articles Obtained By Various Casting Methods

Castings are made of various casting methods of metal forming objects, that is, smelting a good liquid metal, with casting, injection, inhalation or other casting method into the prepared mold, after cooling down the sand, clean up and after Processing, etc., obtained with a certain shape, size and performance of the object.

Casting applications have a long history. Ancient people use castings for coins, sacrifices, weapons, tools and some living utensils. In modern times, castings are mainly used as blanks for machine parts, some precision castings, and can also be used directly as part of a machine. Casting in the mechanical products occupy a large proportion, such as tractors, the casting weight of about 50 ~ 70% of the weight of machinery, agricultural machinery accounted for 40 ~ 70%, machine tools, internal combustion engines in 70 ~ 90%. All kinds of castings, the largest use of mechanical casting varieties, the most complex shape, the largest amount, accounting for about 60% of the total output of castings. Followed by metallurgical steel ingot mold and engineering pipeline. Casting is also closely related to daily life. For example, often use the door handle, door locks, radiators, water pipes, wok, gas stove, iron, etc., are cast.

Casting has a variety of classification methods: according to their different use of metal materials, divided into cast steel, cast iron, cast copper pieces, cast aluminum, cast pieces of magnesium, cast zinc, cast titanium and so on. And each type of casting can be further divided into different types according to their chemical composition or metallographic organization. Such as cast iron can be divided into gray cast iron, ductile iron, vermicular graphite cast iron, malleable cast iron, alloy cast iron, etc .; according to the different molding methods can be divided into ordinary cast sand casting, metal casting, , Centrifugal castings, continuous castings, investment casting, ceramic castings, electroslag remelting castings, bimetallic castings and so on. Which is the largest application of ordinary sand casting, accounting for about 80% of all castings. The aluminum, magnesium, zinc and other non-ferrous metal castings, mostly die castings.

Casting has excellent mechanical and physical properties, it can have a variety of different strength, hardness, toughness with the comprehensive performance, but also both one or more special properties, such as wear, high temperature and low temperature, corrosion resistance The Casting the weight and size range is very wide, the lightest weight of only a few grams, the most important can reach 400 tons, the wall thickness of the thinnest only 0.5 mm, the thickest can be more than 1 meter, the length can be from a few millimeters to ten meters, To meet the requirements of different industrial sectors.

Casting is widely used, has been applied to the hardware and the entire machinery and electronics industry, and its use is to continue to expand the trend. The use of large-scale machinery, machine tools, ships, aerospace, automotive, motorcycle, electronics, computers, electrical appliances, lighting and other industries, many are ordinary people all day contact, but do not understand the Metal objects.

Mainly including the appearance of quality, intrinsic quality and quality of use. The internal quality refers to the chemical composition, physical properties, mechanical properties, microstructure of the casting and the holes, cracks and inclusions present in the casting. The internal quality of the castings is such that the surface roughness, surface defects, size deviation, shape deviation and weight deviation. Such as wear resistance, corrosion resistance, chilling heat, fatigue, shock absorption and other properties as well as the machinability, weldability and other process performance. Casting quality has a significant impact on the performance of mechanical products. For example, the wear resistance and dimensional stability of the machine tool casting directly affect the accuracy of the machine to maintain the life of all types of pump impeller, shell and hydraulic parts of the cavity size, profile accuracy and surface roughness, a direct impact on the pump And the hydraulic system work efficiency, energy consumption and the development of cavitation; internal combustion engine cylinder block, cylinder head, cylinder liner, piston ring, exhaust pipe and other casting strength and resistance to cold heat, directly affect the engine life. There are many factors that affect the quality of castings, the first is the casting process design. In order to determine the casting geometry and size according to the working conditions and the properties of the metal material, it is necessary to consider the rationality of the design from the viewpoint of casting alloy and casting process characteristics, that is, the obvious size effect and solidification and shrinkage , Stress and other issues, in order to avoid or reduce the composition of the casting segregation, deformation, cracking and other defects. The second must have a reasonable casting process. According to the casting structure, weight and size, casting alloy characteristics and production conditions, select the appropriate sub-surface and shape, core method, reasonable set of casting tendons, cold iron, riser and pouring system. To ensure access to high quality castings. The third is the quality of raw materials for casting. Metal inclusions, refractories, fuels, fluxes, modifiers and foundry sand, sand binder, paint and other materials, substandard quality, will make the castings produce pores, pinholes, slag, sticky sand and other defects, affecting the appearance of casting quality And the internal quality, serious castings will be scrapped. The fourth is the process operation, to develop a reasonable process of operation procedures to improve the technical level of workers, so that the correct implementation of the rules. Casting production, the quality of the casting to control and inspection. First of all to develop from the raw materials, auxiliary materials to each specific product control and inspection of the code and technical conditions. For each process are strictly in accordance with the code of practice and technical conditions for control and testing. Finally, the finished product for quality inspection. To be equipped with a reasonable detection method and the appropriate detection staff. Generally, the appearance quality of the castings can be used to determine the surface roughness of the castings. The fine cracks on the surface can be checked by color method and magnetic powder method. The internal quality of the castings can be checked and judged by methods such as audio, ultrasound, eddy currents, X-rays and gamma rays.


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Contact us

Shenzhen Runpeng Precision Hardware Co.,Ltd

The contact:Susan Liao

Mobile:86-18925258235

Phone:86-755-29886925 

Fax:86-755-29886926

E-mail:sales@szrunpeng.cn

Web:www.sz-runpeng.com

Add:Building 69-70, 4th Industrial Zone, Mashantou, Gongming Town,Shenzhen,China.


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