Heat Treatment continued, the build starts.

Finding time for such projects is always problematical, we have customer jobs to get out, both gun work and shiny stuff. It is also the game season so I am out a couple days a month as a minimum and we have the two pups to train, plus the old Labrador who is out working, in fact he is out 4 out of 7 days this week so finding time for my HT is difficult so today I am going to work on the frame plus machine some strikers for a couple of shotguns, one of which needs a good service.

Anyway, this is where I am with the project right now, the design has been updated slightly and will now have a removable top so I can re-build it and/or replace the element if needed. The angle iron for the frame is in the workshop ready to be cut and the aluminium in-fill plates to protect the bricks have been cut to size and are ready to go. This is my first oven build so I really hope the insulation properties of the oven bricks are such that the external surfaces do not get too hot.

The bricks are remarkably easy to cut, however the dust is incredibly hazardous so I am taking care to keep dust to a minimum and a face mask and vacuum cleaner keep things reasonably safe (Fingers crossed)

I am gluing the bricks together with a thin bond of refractory mortar which makes assembly and cutting a bit easier as I can form the four sides and them move them as individual sections. The element slots still need to be cut however I have not yet cut the element so that is something for an evening next week.

I sat down and designed the electrical circuit during the week. There are many examples on the internet however they are not ideal for my purposes so I developed my own control circuit for the PID controller which is housed in the control cabinet to the right hand side of the oven.

More to follow on this…

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