A system and a method are provided for producing rubber mixtures. The system includes installations for performing a monopassage process and a multipassage process to produce a rubber mixture, and a transport system that transports the rubber mixture to one or more of the installations according to a selected recipe. The installations include a mixing and cooling installation that performs a mixing and cooling procedure in which the rubber mixture is formed into a sheet, the sheet is sprayed with water using at least one nozzle provided with water at a predetermined water flow rate and air at a predetermined air pressure, and evaporated water from the spraying of the sheet is evacuated at a predetermined air flow rate. The mixing and cooling procedure causes the rubber mixture of the sheet to reach target temperature and water-content values before a complementary mixing procedure is performed.

A system and a method are provided for producing rubber mixtures. The system includes installations for performing a monopassage process and a multipassage process to produce a rubber mixture, and a transport system that transports the rubber mixture to one or more of the installations according to a selected recipe. The installations include a mixing and cooling installation that performs a mixing and cooling procedure in which the rubber mixture is formed into a sheet, the sheet is sprayed with water using at least one nozzle provided with water at a predetermined water flow rate and air at a predetermined air pressure, and evaporated water from the spraying of the sheet is evacuated at a predetermined air flow rate. The mixing and cooling procedure causes the rubber mixture of the sheet to reach target temperature and water-content values before a complementary mixing procedure is performed.

A vacuum mixing system for the mixing of polymethylmethacrylate bone cement comprising at least one cartridge (4) having an evacuatable internal space (5) for the mixing of the bone cement, the internal space (5) of which comprises a cylindrical swept volume, a mixing element (12) that is arranged in the internal space (5) of the cartridge (4) such as to be mobile and can be operated from outside the vacuum mixing system in order to mix the content in the internal space (5) of the cartridge (4), and a dispensing plunger (2) having a cylindrical external circumference whose first base surface borders a base surface of the internal space (5) of the cartridge (4) and which can be or is locked to the cartridge (4) in detachable manner and which, in the detached state, is mobile in the cylindrical region of the internal space (5) of the cartridge (4).

A vacuum mixing system for the mixing of polymethylmethacrylate bone cement comprising at least one cartridge (4) having an evacuatable internal space (5) for the mixing of the bone cement, the internal space (5) of which comprises a cylindrical swept volume, a mixing element (12) that is arranged in the internal space (5) of the cartridge (4) such as to be mobile and can be operated from outside the vacuum mixing system in order to mix the content in the internal space (5) of the cartridge (4), and a dispensing plunger (2) having a cylindrical external circumference whose first base surface borders a base surface of the internal space (5) of the cartridge (4) and which can be or is locked to the cartridge (4) in detachable manner and which, in the detached state, is mobile in the cylindrical region of the internal space (5) of the cartridge (4).

An ultralow-gloss polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) resin composition and a preparation method thereof are provided. The composition includes the following components: 40-80 parts by weight of bisphenol A polycarbonate, 19-40 parts by weight of acrylonitrile-butadiene-styrene graft copolymer, 1-20 parts by weight of ultralow-gloss toughening modifier, and 0.1-5 parts of processing aid. The ultralow-gloss toughening modifier includes the following components: post-treated polymeric microspheres, a low-temperature toughening agent, a coupling agent, and aid. The preparation method of the composition includes: fully mixing all components in a high-speed mixer to obtain a mixture; feeding the mixture into a main feed port from a twin-screw extruder, melting, extruding, cooling, drying, and pelletizing. The PC/ABS resin composition prepared by the present invention has extremely low gloss level and excellent impact toughness, and it can be applied in scenarios requiring low temperature resistance and low gloss level.

Systems are provided for system for delivering plural materials to plural molding machines according to defined formulations. Material supply units each contains a unique material and is coupled with a set of manifolds that have a mixing chambers. Conduits couple the material supply units with the manifolds. A controller is configured to operate valves to admit select materials from the material supply units into the mixing chamber according to the defined formulations, and to supply the mixed materials to the molding machines.

A weighing apparatus for the preparation of a mixture of granular components that comprise batches of material required by a plurality of processing machines in a plant for the manufacture of plastic products is described. The apparatus comprises a Multi-Channel Gravimetric Batch Blender (MCGBB) configured to weigh predetermined weights of the raw materials and to combine the weighed portions of raw materials into batches according to a predetermined recipe for each processing machine and a computer that controls the operation of all components of the MCGBB. The MCGBB comprises several weighing units arranged in a way that allows material weighed in each of the weighing units to fall through individual chutes via a common funnel into a manifold that distributes the weighed batches to several processing machines via a system of delivery pipes.

A method is disclosed for preparing and dispensing a mixture obtained by mixing at least one first chemically reactive component and at least one second chemically reactive component containing a dispersed solid material by a high pressure mixing device comprising a mixing chamber for mixing the components, in which a valve member is slidable, in particular a slide-valve, provided with longitudinal slots for recirculating the components to respective storage tanks. The method provides removing from at least one tank, a dosed quantity of the at least second chemically reactive second component to with filler material is added; recirculating the second component through the slots of the slide-valve for a period of time that is comparatively very reduced with respect to a recirculating step of the at least first component through the slide-valve. An apparatus for preparing and dispensing the mixture is also disclosed.

A homogenizer for homogenously blending a feedstock includes a separator, an agitator and a hopper integrated as a single unit in a common housing. The separator receives a material feed, in the form of a fluid medium carrying a composite feedstock, and separates the composite feedstock from the fluid medium. The agitator receives the separated composite feedstock from the separator, and mixes the composite feedstock to yield the homogenously blended feedstock. The hopper receives the homogenously blended feedstock from the agitator and holds the homogenously blended feedstock for release to either a processing machine or a storage container. The homogenizer is controlled by one or more control units that use signals received from a sensor in the hopper to control the delivery of a material feed to the homogenizer, and the flow of feedstock therethrough.

A gravimetric blender has a frame, at least one material storage hopper at the top of the frame including a hopper cover, a weigh bin located within the frame, below the hopper, for receipt of material from the hopper to be weighed and being adapted for downward discharge of the material in the bin after the material received from the hopper has been weighed, at least one load cell connecting the weigh bin to the frame for sensing the weight of contents of the weigh bin, a mixer within the frame below the hopper, for mixing material weighed in the weigh bin after that material falls downwardly from the weigh bin to the mixer, and a guide adapted for vertical movement of the hopper cover therealong between positions which the cover contacts and thereby closes the hopper and at which the cover is spaced vertically but maintained in a horizontal plane above the hopper so that the hopper is open at the top.