Hot plate
A hot plate is an essential piece of equipment if you are going to be working on high carbon tools, such as D2 punches and dies, because it is very important to keep these tools above their pre-heat temperature at all times during welding. There will be many ways of making hot plates, gas or electric or you may prefer to buy one ready made. I have always used home made hot plates heated by a hand-held propane torch as shown in Fig. 7.10.
- Propane heating torch heats hot plate and fire bricks help to shield operator
Home made hot plate
Handbook of mold, tool and die repair welding Heavy duty portable hot bench
This piece of equipment was specially made for large television sized tools which are too heavy to move around from bench to bench. A tool can be lifted off a machine straight to the hot bench and easily moved to a welding area, pre-heated, welded, cooled and then moved to the machining area without leaving the bench. The heavy duty hot bench is based on exactly the same principle as the hot plate; see Fig. 7.11.
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