This category includes vacuum mixers and burnout ovens. The capacity of vacuum mixers include 1-flask model, 3-flask model, 5-flask model and 6-flask model. The capacity here is refered to as the quantity of 4*10'' flasks that can be placed in a mixer. In burnout oven series, we have regular ovens with double temperature control and a capacity ranging from 4 flasks to 40 flasks. The rotary burnout ovens we developed are 17 -flask rotary burnout oven and 40-flask burnout ovens for option. Rotary burnout ovens are featured by heating by the slope so that the flasks will be heated more evenly, the coil will be better protected and the service life will be prolonged.