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2.2 Die casting mold and pouring system planning The mold adopts a six-sided core pulling structure, which is mainly composed of the fixed mold part, the moving mold part, the forming part, the pouring system, the core pulling organization, the ejecting organization, the exhaust system, the heating and insulation equipment, and the positioning and guiding system. Die casting die material is 3Cr2W8V and H13 steel, the core rod can be selected titanium alloy or superalloy, after heat treatment of its hardness (HRC) to more than 45, after surface nitriding treatment, die casting die life can reach more than 100,000 times.

First, optimize the alloying ingredients, supplemented by the essence treatment, to achieve the intention of purifying the alloy liquid; Secondly, the pouring and overflow system is rationally arranged, the low temperature and dirty alloy liquid filled in the front end is introduced into the slag collection bag, and the tooth-shaped chill exhaust block is selected to exhaust, and the slag collection effect is excellent. Shrinkage is characterized by tissue shrinkage, discontinuity, and can be holes and loose areas. The reason is that when the alloy liquid fills the cavity, the pressure cannot be transferred in time to ensure the alloy liquid to cool and condense under pressure, and there is a phenomenon that the liquid metal shrinkage is greater than the solid shrinkage in some thick-walled areas. The method of eliminating shrinkage and loosening, first of all, in the process planning must follow the sequence filling, sequence condensation, timely pressure building criteria, to ensure that all parts of the casting under the pressure pressure to get the alloy liquid timely and effectively make up; Secondly, the selection of reducing the mold temperature of part of the forming part, partial pressurization, high-pressure water cooling and other methods can effectively improve the forming quality of the surrounding.

Within the domain of metal casting production processes, surface defects represent a critical quality concern that directly impacts both the functional performance and aesthetic presentation of finished components. When examining the casting surface, spots that display chromatic or textural differentiation from the underlying base metal composition typically originate from paint-derived carbide deposits that accumulate during the mold preparation phase. The formation mechanism of these paint-based surface blemishes results from multiple interconnected factors within the mold coating application workflow. First among these causative elements is the condition of the paint material itself, wherein paint that lacks adequate purity or has been applied in excessive quantities creates an uneven surface layer prone to localized carbide formation during the casting process.

Precision aluminum die casting mold professional customization services are available through direct telephone consultation, with technical teams ready to address specific requirements for complex mold design and manufacturing processes. The casting system finishing phase employs automatic hydraulic trimming machinery combined with precision trimming dies to systematically remove the pouring system, overflow reservoir pathways, and cylinder bore flash material, ensuring dimensional accuracy across all critical surfaces. Within the aluminum casting manufacturing sector, proper gating and overflow system design directly impacts final component dimensional stability and surface quality, making this finishing stage essential for parts destined for automotive engine blocks, hydraulic housings, or precision mechanical applications. Residual stress management in heat-treated aluminum cylinder block castings represents a critical metallurgical consideration, as these tensile and compressive stresses originate from three distinct sources: thermal stress generated during cooling phase transitions, phase change stress arising from structural transformations within the aluminum alloy matrix, and shrinkage stress resulting from volumetric contraction during solidification.