Two-tube continuous sand muller

A continuous sand muller for mixing foundry sand and binder additives for core and mold production, said muller comprising:

• a frame;
• premixing means removably secured to said frame for mixing sand and a binder catalyst additive, said premixing means including an elongated sleeve defining a sand inlet at one end and an outlet at the other end, a high intensity auger means rotatably mounted within said sleeve for blending and continuously conveying a sand and additive mixture from the inlet to the outlet, and a binder catalyst additive inlet means on said sleeve for feeding said binder catalyst additive to said premixing means;
• mounting means engaging said frame for removably mounting said premixing means to said frame so that said premixing means may be removed from said frame as a unit and without disassembly;
• primary mixing means removably secured to said frame for receiving the premixed sand and binder catalyst additive mixture and mixing same with a binder resin additive, said primary mixing means including an elongated primary sleeve having a primary inlet at one end and a primary outlet at the other end, said primary inlet being positioned below said outlet of said premixing means to receive the mixture from said premixing means, a binder resin additive inlet means on said primary sleeve for feeding a resin additive to said primary mixing means, a high intensity primary auger means within said sleeve for continuously mixing said premixed sand and binder catalyst additive mixture with said binder resin additive and conveying said mixture to said primary outlet, and means for rotatably mounting said primary auger means within said sleeve;
• another mounting means engaging said frame for removably mounting said primary mixing means to said frame so that said primary mixing means may be removed from said frame as a unit without disassembly;
• and
• drive means on said frame for positively rotating said auger means of said premixing means and said primary auger means at the same volumetric rate, said means for rotatably mounting said primary auger means comprising a pair of mounting plates carried by said primary sleeve, one at each end thereof, said primary auger means including an elongated shaft;
• and a pair of bearing assemblies, each secured to one of said mounting plates and rotatably receiving said elongated shaft, said another mounting means removably securing one of said mounting plates to said frame.