Heat Treating of Aluminum Molds
No. 883 is a 1000°F electric universal oven from Grieve, currently used for solution heat treating of aluminum molds at a customer’s facility.
Workspace dimensions of this unit measure 38”W x 48”D x 36”H. 24kW installed in Icoloy sheathed tubular elements heat the workspace, while a 1,200 CFM, 1-HP recirculating blower provides universal pattern front-to-rear airflow to the workload. This oven features 8” thick insulated walls, comprising 2” of 1900°F block and 6” of 10 lb/cf density rockwool insulation, as well as an aluminized steel exterior, a Type 304, 2B finish stainless steel interior and a motor-operated vertical lift door. No. 883 also includes a reinforced insulated floor with inverted angle wheel guides, a 300 lb. Capacity stainless steel subway grating loading shelf and an external loading table to support the shelf for loading. The unit had numerous safety and control devices on board, including a digital indicating temperature controller with separate heating element control contactors, a recirculating blower airflow safety switch, an SCR power controller and a 10” diameter circular chart recorder.
The Secrets to Hard Milling Success
In moldmaking, the surface of the mold has a direct impact on the surface of the product being molded. Because of this, proper surface finishing is essential to producing quality parts.
Schools for mold polishing do not exist and most veteran polishers don't want to teach the subject, so here are a few simple polishing guidelines.