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1. Mold material selection
The selection of mold materials for Die Cast Aluminum Alloy Machinery Parts is crucial to the life of the mold and the quality of the casting. Mold materials generally use high-strength alloy steel, such as H13, SKD61, etc. These materials have good high temperature resistance, wear resistance and thermal fatigue resistance, and can withstand high temperature and high pressure working environments.
High temperature resistance: During the die-casting process, the mold needs to withstand the high temperature impact of the aluminum alloy. Mold materials with good high temperature resistance can effectively prevent mold deformation and cracking.
Wear resistance: High-strength alloy steel has good wear resistance, which can extend the service life of the mold and reduce maintenance and replacement costs.
Heat treatment performance: The mold material must have good heat treatment performance. Through appropriate heat treatment process, its hardness and strength can be improved, and the durability of the mold can be further enhanced.
2. Mold structure design
Die Cast Aluminum Alloy Machinery Parts structural design is the key to ensuring the quality and production efficiency of Die Cast Aluminum Alloy Machinery Parts. The geometry of the part, the demoulding slope, the gate system, the cooling system and other factors should be considered during the design.
Geometry: The geometry of the mold needs to closely match the shape of the part to ensure the dimensional accuracy and surface quality of the casting. At the same time, the mold structure should be simplified as much as possible to avoid overly complex cavity design and improve the convenience of mold processing and maintenance.
Demolding slope: In mold design, it is necessary to set an appropriate demoulding slope for the part to ensure that the part can be demoulded smoothly after cooling and solidification to avoid deformation and damage. Generally speaking, the demoulding slope should be controlled between 1° and 3°, and adjusted according to the specific shape and size of the part.
Gate system: Reasonably design the gate system to ensure that the molten aluminum alloy can quickly and evenly fill the mold cavity and reduce the occurrence of defects such as pores and cold shuts. The design of the gate position and size needs to be combined with the structural characteristics of the part to select the best pouring path and pouring point.
3. Cooling system design
The cooling system is an important part of mold design and directly affects the cooling speed and internal quality of the casting. Reasonable cooling system design can improve production efficiency and ensure the quality of castings.
Cooling channel layout: The layout of the cooling channel needs to be evenly distributed around the mold cavity to ensure that the temperature of the aluminum alloy is evenly distributed during the cooling process to prevent local overheating and thermal stress concentration. The size and shape of the cooling channel should be designed according to the mold structure and cooling requirements.
Cooling medium selection: Common cooling media include water, oil, etc. Water cooling has high efficiency and is suitable for high temperature and high pressure die casting processes; oil cooling has good stability and high temperature resistance, and is suitable for specific process requirements.
Cooling time control: The control of cooling time has a significant impact on the quality of castings. Reasonable cooling time can improve the density and mechanical properties of castings and prevent the occurrence of thermal cracks and deformation. The design of cooling time needs to be optimized in combination with the size and shape of the casting.
