Conversely, thin folds reduce folds, forming thick folds greater than thick folds.The wall thickness of aluminum castings will change with the shape of aluminum castings. In order to prevent wall thickness problems of aluminum castings, one aspect should immediately correct the damage of the mold and flask to make the aluminum casting deflect; and whether the positioning pins and positioning pins move and damage, check the flask and template Locating pins and pin holes are free from wear and deformation.
The reason is simple, because the thickness difference between the upper and lower parts is large, and the temperature difference formed by cooling is also large. Nonferrous casting In addition, it is also necessary to strictly enforce the core and core space. The posture and dimensions of aluminum castings do not match the type.; errors in molds, models, or other parts of the mud box; perhaps the sand box is not suitable; the clay core is deformed during the production, baking and transportation; the sand box is caused by neglecting the mold to be poured before pouring mobile.
Because the beam is connected up and down, the thickness of the beam is not only shrunk due to the temperature drop, but also expanded and shrunk due to the thinness and shrinkage. The deformation of aluminum castings is caused by casting stress. There are many reasons for this problem, such as poor mold matching, wear of positioning pin sleeves, and molds.
When molding the template, positioning pins should be used to ensure that the postures of the aluminum castings of the upper and lower boxes are consistent; if necessary, the tenon can be used to prevent tilt; the clay core supported by the clay core should not be used. They are generally called interweaving boxes, interweaving edges, and biased cores. Movement on aluminum castings, etc
Tags: Nonferrous casting
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