Gravity Castings Aluminum 7075 for Aerospace Pump Auto Motorcycle Cylinder HeadCustomized Factory Pr

 

Design of Die Casting Parts

(1) Shape and structure of die-casting parts

a. Eliminate internal concave side;

b. Avoid or reduce core pulling parts;

c. Avoid core crossing; A reasonable structure of die-casting parts can not only simplify the structure of die-casting molds, reduce manufacturing costs, but also improve casting quality.

⑵ Wall thickness

The wall thickness of die castings has a significant impact on the quality of castings. Taking aluminum alloy as an example, thin-walled walls have higher strength and good compactness than thick walls.

Therefore, while ensuring sufficient strength and rigidity of the casting, the wall thickness should be minimized as much as possible and kept uniform. When the casting wall is too thin, it causes poor metal fusion, affects the strength of the casting, and also brings difficulties to the forming process; Excessive or severely uneven wall thickness can easily cause shrinkage and cracks. As the wall thickness increases, defects such as porosity and shrinkage porosity inside the casting also increase, which also reduces the strength of the casting. The wall thickness of die-casting parts is generally~4mm, and parts with a wall thickness exceeding 6mm are not suitable for die-casting.

The wall thickness of die-casting parts (usually referred to as wall thickness) is a factor with special significance in the die-casting process. Wall thickness is closely related to the entire process specification, such as the calculation of filling time, the selection of inner gate speed, the calculation of solidification time, the analysis of mold temperature gradient, the effect of pressure (final specific pressure), the length of mold retention time, the level of casting ejection temperature, and operational efficiency;

a. The thicker wall thickness of parts can significantly reduce the mechanical properties of die castings, and thin-walled castings have good compactness, which relatively improves the strength and pressure resistance of castings;

b. The wall thickness of the casting should not be too thin, as it can cause poor filling of aluminum liquid and difficulty in forming, resulting in poor fusion of aluminum alloy, easy occurrence of defects such as cold shuts on the surface of the casting, and bring difficulties to the die-casting process; As the wall thickness of die castings increases, internal defects such as porosity and shrinkage increase. Therefore, while ensuring sufficient strength and stiffness of the castings, the wall thickness of the castings should be minimized as much as possible and the thickness of the cross-section should be kept uniform. In order to avoid defects such as shrinkage porosity, the thickness of the thick wall of the castings should be reduced (material reduction) and ribs should be added; For large-area flat plate thick wall castings, set ribs to reduce the wall thickness of the castings.

1) The wall thickness of die castings is related to their performance.

2) The wall thickness of die castings affects the state of the metal liquid filling cavity, ultimately affecting the surface quality of the castings.

3) The wall thickness of die castings affects the consumption and cost of metal materials.

When designing die castings, it is often assumed that the thicker the wall, the better the performance, in order to ensure the reliability of strength and stiffness; In fact, for die-casting parts,

As the wall thickness increases, the mechanical properties significantly decrease. The reason is that during the die casting process, when the metal liquid enters the mold cavity at high pressure and speed, it quickly cools and solidifies after contacting the surface of the mold cavity. A layer of fine grain structure is formed on the surface of the quenched die casting. The thickness of this dense fine grain structure is about 0.3m, so thin-walled die castings have higher mechanical properties. On the contrary, the central layer of thick walled die castings has larger grains, which are prone to defects such as internal shrinkage, air holes, and external surface depressions, resulting in a decrease in the mechanical properties of the die castings as the wall thickness increases.

As the wall thickness increases, the metal material consumption increases and the cost also increases. However, if the minimum wall thickness is calculated solely from the structural aspect and the complexity of the casting is ignored, it can also cause the liquid metal to fill the cavity in an unsatisfactory state, resulting in defects.

On the premise of meeting the functional requirements of the product, taking into account the impact of each subsequent process, achieving good formability and processability with the lowest metal consumption, and adopting a normal and uniform wall thickness is preferred.

 

 

 

 

Basic Information

Total Capitalization	less than US$50,000
Country / Region	China
Year Established	2014
Total Employees	100 to 149
Business Type	Exporter, Manufacturer, Trading Company

 

Trading Capabilities

Total Annual Sales	less than US$50,000
Export Percentage	90 percent to 94 percent
OEM Services	Yes
Small Orders Accepted	Yes
Brand Names	Innolead
Payment Terms	TT
Main Competitive Advantages	Experienced R&D Department, Large Product Line, ODM (Original Designing & Manufacturing), OEM Capability, Production Capacity, Reliability, Reputation
Other Competitive Advantages	NA
Major Customer	Soprano, European Thermodynamics Ltd.
Export Markets	Australasia, Central/South America, Eastern Europe, Mid East/Africa, North America, Western Europe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTACT US

Alex He

Tel:+86 15989331617

Whatsapp&Wechat:+86 15989331617

Skype ID:alex.ho43

Email: alex.he@innolead.net

 

Web:www.innolead.net

 

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