Prevention methods of non spheroidizing or bad spheroidizing defects of ductile iron parts
Features: the fracture surface of the casting is gray black, and the mechanical properties are obviously low. Through metallographic examination, […]
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Carbon emission source and evaluation boundary of sand casting production system
1. Carbon emission source of sand casting production system A large amount of waste gas produced by sand casting production
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The history and development of foundry technology in China
Casting is the process of melting metal into a liquid that meets certain requirements and pouring it into the mold.
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Design of gating system and inner runner in casting process
Gating system design： 1.Design of sprue cup (1) Sprue cup shape The shape of sprue cup can be divided into
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Research status of rapid sand casting at home and abroad
Rapid Prototyping technology relies on the point by point accumulation forming of materials, which is not restricted by the manufacturability
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Analysis of common defects in castings
Casting porosity This is a small cavity formed by the gas which can not escape during the solidification of metal.
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Sand casting – hand molding
Manual modeling definition – all modeling operations completed by hand or hand tools are called manual modeling. Advantages and disadvantages:
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Design of casting process parameters
1.Casting shrinkage There are many factors that affect the casting shrinkage, such as the type and composition of the alloy,
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Engine cylinder block and cylinder head produce casting porosity
Porosity is usually the most common defect in cylinder block castings, which often takes the first place in the scrap
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Design of sand core for parts casting
The design of sand core is very important in the casting process, which directly affects the dimensional accuracy of castings
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Common measuring tools for sand casting
1 tape measure: Used to measure length. 2 steel ruler: It is a common measuring tool for measuring length, outer
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Selection of parting surface for casting parts
Parting surface refers to the surface on which two half molds contact each other. In addition to the solid casting
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Causes of crack formation in aluminum alloy wheel during low pressure casting
Low pressure casting can realize high mechanization and automation, not only improve the productivity (10-15 type / h), but also
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Common repair tools for sand casting
In order to make the sand mold (core) qualified, the defects of the sand mold (core) should be repaired with
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Determination of pouring position of sand casting
The pouring position of casting refers to the position of casting in the mold during pouring. The determination of pouring
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Common tools for sand casting
Common modeling tools are as follows. 1 shovel:Also known as shovel, it is used to shovel and mix sand (core).
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Investigation on quality assurance system of nuclear power valve casting manufacturer
The buyer of the casting should not only pay attention to the quality of the casting itself, but also the
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Application of sand casting technology in valve production
The quality of mold (core) sand has a great influence on the quality of casting. For example, the defects of
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Casting and core making method of product parts
1.Manual core making (clay sand, synthetic grease, resin sand) Manual core making is suitable for simple and small batch castings.
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Casting pattern and core box for sand casting
The mold used to obtain the shape of the casting is called pattern, and the mold used to obtain the
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Characteristics and problems of valve casting process
Casting features: 1.Casting has a wide range of adaptability, great flexibility, product requirements and various working conditions. It can manufacture
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Influence factors of die casting defects
Thinking of solving die casting defects Because the causes of each defect come from many different influencing factors, so in
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Overview of valve casting in China
Casting is the process of pouring liquid metal into a mold cavity which is suitable for the shape of the
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Product parts casting molding method
After the design of product parts, the reasonable molding and core making methods shall be determined according to the product
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Sand box and mold plate for sand casting
Casting sand box When making sand mold, we need to use a frame without bottom, cover and around the sand
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Prevention of graphite floatation defects in iron castings
Features: a layer of clear and dense black spots can be seen on the upper surface of the fracture surface
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Review the structure of parts from the point of view of simplifying the casting process
1.Improve the structure of boss, flange and rib plate that hinder the lifting The boss (LAP), flange, rib plate, etc.
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Assembly characteristics of sand casting process
Sand casting process equipment is the general name of molds and devices used in the process of molding, core making
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The prevention method of spheroidization decline defect of cast iron
Features: in the castings poured by the same ladle, the early casting has good spheroidization, and the later casting has
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Review the rationality of casting structure from the aspect of avoiding defects
The casting process of part structure usually refers to that the structure of the part itself should meet the requirements