Optimization of the heat node distribution of castings is a systematic work, which requires comprehensive consideration of the structural characteristics of castings, flexible use of process measures such as riser and cold iron, and precise control of process parameters to achieve balanced solidification of castings, reduce defects, and improve quality. The following are some specific operation methods to optimize the heat node distribution of castings:

Set the riser reasonably

Determine the position of the riser: through the solidification simulation software and other tools, analyze the hot node distribution of the casting during the solidification process, and set the riser above or near the hot node, so that it can provide enough metal liquid for feeding when the casting solidifies and contracts. In general, for thick parts, corners and other places where hot knots are easy to form, priority should be given to setting the riser.

Calculate the size of the riser: according to the size of the hot knot of the casting, solidification time and other factors, calculate the size of the riser. The volume of the riser should be large enough to ensure that there is sufficient metal liquid supply during the solidification process of the casting. Can use the modulus method, proportional method and other methods to determine the size of the riser, for example, for the simple shape of the casting, can be calculated according to the proportion between the mold of the casting and the mold of the riser size, the general requirement of the riser module is greater than the mold of the hot joint of the casting.

Select the riser type: According to the structure and production process of the casting, select the appropriate riser type. Common risers are open risers and dark risers, open risers have good feeding effect, but large liquid metal consumption; The dark riser saves metal liquid%