What are the defects in the assembly tree of investment casting

What are the defects in the assembly tree of investment casting

The process of investment casting tree formation is actually composed of two processes. These two processes are assembly and welding, because sometimes wax parts do not have gates and need to be made or pressed, then bonded to the wax parts, and finally connected to the pouring system. During these two processes, defects may occur during the tree formation process. Today, precision casting manufacturer Tianyao Metal will talk to you about the types of tree formation defects.

Assembly requires size to ensure, so inconsistent dimensions or dimensions that do not comply with the process documents are its defects; Welding also requires welding quality, so poor welding is a defect in welding.

1、 Size issue. This size includes the gate size and position size of the wax piece. Generally speaking, when assembling a tree, the position of the sprue and inner gate should be accurately drawn with a ruler, and then assembled according to the process drawing, and it must be horizontal and vertical. In addition, the size of the gate and runner should be accurate. Therefore, it is generally not recommended to manually make sprues and runners, as consistent sizes are difficult to ensure, and combinations come in various shapes and shapes.

2、 Welding issues. The welding problem involves two aspects, one is the weld seam and the other is the welding strength. The welding seam mainly prevents the surface layer slurry from penetrating and causing sand inclusion in the casting, and the welding strength mainly ensures the shell making operation. Both of these are possible defects in group trees. Weld defects are commonly referred to as virtual welding. These two are also common group tree defects.

There are many processes and influencing factors in investment casting, and any small step can have the greatest impact on the quality of the casting. Therefore, every detail should strive for excellence, so that the quality of the casting can ultimately be achieved.

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