A die-casting mold for a cvt automatic transmission case

Abstract

The invention belongs to the technical field of die-casting dies, and provides a die-casting die for a CVT automatic transmission shell. The die-casting die comprises an upper die plate, an upper die block, a lower die plate and a lower die block. An injection die cavity is formed between the upper die block and the lower die block, and the automatic transmission shell is arranged in the injection die cavity of the die-casting die. A double-insert assembly is arranged at the position of an oil way groove of the automatic transmission shell in the injection die cavity. The die-casting die further comprises a side pressure locking mechanism. The side pressure locking mechanism is arranged on the side edge of the die-casting die. The die-casting die for the CVT automatic transmission shell has the advantages that extrusion feeding is performed on the oil way groove in an insert-embedded-insert mode; meanwhile, due to arrangement of the locking device, a side pressure application position is locked, and the pressure position at the oil way groove position can be guaranteed; and the effect is better in the feeding process, the overall structure is simple, universality is good, and therefore the quality of the oil way groove position is ensured, the defects of shrinkage porosity, pin holes and the like are overcome, the percent of pass of castings is increased, and manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of die-casting molds, in particular to a die-casting mold for a CVT automatic transmission case. Background technique [0002] In the process of producing automatic transmission casings, the castings are usually produced by extrusion casting. Due to the different wall thicknesses, the solidification sequence will be different, and defects such as shrinkage and shrinkage will occur at the wall thickness, resulting in The quality of the product cannot meet the requirements, such as figure 1 The CVT automatic transmission case shown here has an irregular transmission oil passage on one side of the CVT automatic transmission case, here the oil passage of the transmission has multiple oil passage grooves, and here the oil passage grooves are formed by die-casting In order to ensure the molding quality of the oil passage groove, control is required. The unreasonable control structure in the prior art causes the o...

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Problems solved by technology

[0002] In the process of producing automatic transmission casings, the castings are usually produced by extrusion casting. Due to the different wall thicknesses, the solidification sequence will be different, and defects such as shrinkage and shrinkage will occur at the wall thickness, resulting in The quality of the product cannot meet the requirements, such as figure 1 The CVT automatic transmission case shown here has an irregular transmission oil passage on one side of the CVT automatic transmission case, here the oil passage of the transmission has multiple oil passage grooves, and here the oil passage grooves are formed by die-casting In order to ensure the forming quality of the oil channel groove, it needs to be controlled. The control structure in the prior art is unreasonable, which causes the oil channel groove to shrink and loosen during the die-casting molding process, directly reducing the forming quality of the oil channel groove.

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