The mould is then covered to exclude dust .
This will reduce and equalize mold temperatures .
It seems he is a tool-and-die maker .
Mold temperature is controlled by water flow in cooling channels .
Also the machine mold is up to the required temperature and is usually controlled by thermostat .
In grid casting operations, mold spray application involves time when no grids are produced .
Multi-cavity molds are sometimes provided with knock-out pins for easy ejection of the casting from the molds .
All lead castings were produced at first by hand in many cases from single cavity molds .
Eight grid molds of the conventional design are mounted, equally spaced along the table top's circular edge .
Too much water reduces the adhesion and too little piles the material up too thick on the mold surface .