Mold

Material shrinkage and draft

material shrinkage

When the material (plastic) is heated and melted for molding, it expands and increases in volume.After molding, it shrinks when cooled.

draft angle

When taking out the pudding, if there is a slope, it can be taken out of the mold cleanly.
Similar to this, a slope is provided to facilitate removal from the mold.

During molding, resistance is generated due to shrinkage of the material, making it easier to pull out.