Die Casting Parts Characteristic
Die casting is a kind of pressure casting parts, is to use the installed pressure casting mold casting machine die casting machine, the heating for liquid copper, zinc, aluminum or aluminum alloy of metal poured into the die casting machine into the mouth, the die casting machine die casting, casting the shape and dimensions of the mould limit of copper, zinc, aluminium or aluminium alloy parts, such parts are often called die casting. Die castings in different places have different name, such as die casting parts, pressure casting, die casting, die casting, aluminum, zinc die casting parts, die casting, copper pieces, copper die casting, zinc die casting, aluminum die casting aluminum alloy die casting, aluminum pressure casting, aluminum alloy die casting parts, etc.
Because the metal copper, zinc, aluminium and aluminium alloy has good liquidity and plasticity, and casting processing is in pressure die casting machine casting, aluminum die casting can make all kinds of complicated shape, can also make a higher precision and smooth finish, thus greatly reduced the mechanical processing capacity of the casting and metal copper, zinc, aluminum or aluminum alloy casting allowance, not only saves electricity, metal materials, but also greatly save the labor cost; Copper, zinc, aluminum and aluminum alloy have excellent thermal conductivity, small proportion and high machinability. By die casting are widely used in automotive, internal combustion engine production, motorcycle manufacturing, motor manufacturing, oil pump, transmission machinery, precision instruments, botanical garden beautification, the electric power construction, building decoration and other industries.
Die casting can be made for die casting auto parts, die-casting car engine fittings, die casting, air conditioning accessories, die-casting cylinder of engine cylinder head casting, die casting valve rocker arm, die-casting valve bearings, electrical accessories, die-casting motor end cover, die casting, die casting, die casting, pump shell shell building parts, die-casting parts, die-casting fence parts, die-casting parts and so on, with the constant improvement of the level of domestic manufacturing equipment industry development, die-casting machine equipment level increased significantly, also can produce the types of parts are also constantly expanding, the precision of the die casting parts of, the complexity of the components has been larger ascension, believe in the near future, die casting will be better service to our production and life!
The control of surface temperature of die casting mould is very important for the production of high quality die casting. Not average or inappropriate mold temperature will also lead to unstable casting size, ejection in the process of production of casting deformation, thermal pressure, sticky mold, surface depression and shrinkage cavity and defects such as hot bubble. When the temperature difference is larger, the variables in the production cycle, such as filling time, cooling time and spraying time, have different degrees of influence.
The design specification
Die casting design must take into account of the casting, die casting die casting wall thickness and fillet on the draft, stiffener, die casting casting hole and the hole to the edge of the minimum distance, rectangle holes and slots in die casting, die casting, machining allowance of embedded parts, die-casting parts within seven aspects.
Casting the rounded design specification: usually die casting parts intersection should be rounded (parting surface except), can make the metal filling flow smoothly, gas also relatively easy to discharge, and can avoid the crack due to acute Angle. For the die-casting parts that need to be plated and coated, the round Angle can be coated evenly to prevent the sharp corners from piling up. The radius R of the die casting piece is generally not less than 1mm, and the minimum radius is 0.5mm.
Design specification for embedded parts in die casting: first, the number of embedded parts in the die casting should not be excessive; Secondly, the connection of insert and die casting must be firm, and the slot, bulge and knurling of the embedded parts are required. Once again, the embedded parts must avoid the sharp corners, which can be installed and prevent the casting stress concentration. If there is a serious electrochemical corrosion effect between the castings and the embedded parts, the embedded surface needs to be protected by coating. Finally, the castings should avoid heat treatment, so as to avoid the volume change caused by the phase change of the two metals.