Abstract: An apparatus and a process is disclosed for controlled mixing of a mixable material in a high intensity mixer. The system enables instantaneous, precise and continual monitoring of a batch in a high intensity mixer which heretofore could not be achieved. The process comprises the steps of feeding a batch of material into a high intensity mixer, agitating the batch in the mixer, monitoring batch temperature separately from mixer temperature and discharging the batch from the mixer when the batch temperature reaches a final predetermined level. The apparatus includes means for monitoring batch temperature in a high intensity mixer separately from mixer temperature, and means responsive to the batch temperature to discharge the batch when the batch temperature reaches a final predetermined level.

Abstract: An extruder for the preplasticization of thermoset molding resins is disclosed. The extrusion machine includes a screw that rotates in a heated cylinder and compresses the fed-in pulverulent thermoset resinous material against a predetermined ramming pressure until it is plasticized. At the discharge end of the screw cylinder a receiving cylinder is disposed which has a hydraulic discharge piston which continuously retracts when an adjustable pressure head has been exceeded.

Abstract: A mixing head for a high velocity reaction injection apparatus for mixing and dispensing two or more liquid components. The mixing head includes a mixing chamber with two or more inlets for the separate components and an outlet for dispensing the mixed components, and an injection housing for injecting each component through a corresponding inlet. Component flow is directed through a flow accelerating passage in the injection housing prior to injection into the mixing chamber, for imparting a pressure drop in the component on the downstream side of the passage, and means are provided for selectively blocking the inlets for terminating the dispensing of the mixed components and thereby increasing the component pressure in the injection housing downstream of the passage.

Abstract: A mix for batch mixing a treatment agent and a particulate material comprises a mixing chamber having at least one mixing member rotatably mounted therein. Outlet means is positioned to receive the mixed batch of material from the mixing chamber. The mixing member may be rotated at a first speed of rotation effective to mix materials within the mixing chamber without discharging from the outlet means. The mixing member is also rotatable at a second speed of rotation effective to discharge the charge or batch of material through the outlet means after it has been treated during the initial mixing step. The rotation of the mixing member at a higher rate of speed at the second speed of rotation effects discharge through the outlet means by centrifugal force.

Abstract: A mixing valve is located at the opening of a mold cavity to control the flow of a fast setting mixture into the mold and to mix the ingredients forming the mixture immediately prior to dispensing into the mold. The valve includes a plurality of mixing elements on a mixing head which rotates about its own axis within the valve housing and which cooperates with the housing to define a mixing chamber receiving the ingredients. When the valve is open, the plurality of mixing elements supported from the head in the mixing chamber are rotated with the head to mix the ingredients into the fast setting mixture. The head also reciprocates along its axis to open and close the valve and completely fills the chamber to eject the mixed ingredients when the valve is closed.

Abstract: The specification describes a high pressure mixing head for producing a chemically reactive mixture for producing foam articles. An expulsion piston adapted to move in a mixing chamber with inlet ports for the reactive mixture components and with an outlet port is driven by a drive piston. In order to achieve a higher velocity of the expulsion piston in the vicinity of the inlet ports the drive piston is constructed in two parts, an inner piston part and an outer annular piston part adapted to slide on the inner piston part. At the end of the stroke the outer piston part is arrested and the inner piston part continues to move at a higher velocity, a projection at the end of the drive piston moving into a recess. At the beginning of the stroke in the other direction the projection is moved out of the recess by a pressure medium at a high speed until the projection has cleared the recess.