A feeding screw machine serves for feeding a processing screw machine. The feeding screw machine comprises a housing with at least one housing bore formed therein. An associated screw conveyor shaft is rotatably disposed in the at least one housing bore to convey material in a conveying direction from a supply opening to a feeding opening. An emptying opening is formed in the housing. The emptying opening enables an easy, fast and reliable emptying and cleaning of the feeding screw machine independently of the processing screw machine.

A mixing and extrusion machine (10) for the manufacture of rubber mixtures includes a mixer with a converging conical twin-screw (12) with a fixed frame (14) that supports sleeves (16). Two screws (18), being mounted at an angle, are mounted in the mixer (12) in such a way as to move in translational movement between an opening (22) arranged upstream and an outlet (25) arranged downstream of the sleeves. The screws are mounted in the sleeves with removable doors including sliding shutters (40) installed relative to the outlet (25). The sliding shutters move linearly between a closed position, in which the sliding shutters prevent the mixer from discharging the mixture, and an open position, in which the sliding shutters prevent discharge of the mixture through the sides of two counter-rotating rollers (32) of a roller nose type system located just downstream of the outlet.

A spray gun for a plural component system is provided. The spray gun includes a first component delivery line and a second component delivery line. The spray gun also includes a nozzle, configured to receive and mix a first component received from the first component delivery line with a second component received from the second component delivery line. The spray gun also includes an air purge system configured to, when the spray gun is in a non-actuated position, purge the nozzle of the first and second components and, when the spray gun is in an actuated position, aid in atomization of the mixture of the first and second components.

A mixing and extrusion machine (10) has a converging conical twin-screw mixer (12) with a fixed frame (14) that supports sleeves (16) in which two screws (18) are mounted at an angle between an opening (22) arranged upstream of the sleeves, where an introduction hopper (24) of the machine (10) feeds the screws, and an outlet (25) arranged downstream of the sleeves, where the mixer discharges the mixture at the end of a mixing cycle. At least one mobile sleeve (34) is disposed towards the outlet, each mobile sleeve with a support surface (34a) of a predetermined surface area (34a) according to an elasticity of the mixture, and each mobile sleeve having one or more mobile elements that move by a linear movement with respect to the outlet in order to adjust a predetermined space between the sleeves and the screws.

A powder storage apparatus 41 includes: a container 42 having a powder inlet 18A, a powder outlet 10A, and a gas outlet 18B; and a tube 70 connected to the powder inlet 18A. If A.sub.S [m.sup.2] is a cross-sectional area of a cross section perpendicular to an axis of the tube 70 at a bottom end 70b of the tube 70 and A.sub.B [m.sup.2] is a cross-sectional area of the gas outlet 18B, the following expression is satisfied.

A.sub.S/A.sub.B<4

A powder storage apparatus 41 includes: a container 42 having a powder inlet 18A, a powder outlet 10A, and a gas outlet 18B; and a tube 70 connected to the powder inlet 18A. If A.sub.S [m.sup.2] is a cross-sectional area of a cross section perpendicular to an axis of the tube 70 at a bottom end 70b of the tube 70 and A.sub.B [m.sup.2] is a cross-sectional area of the gas outlet 18B, the following expression is satisfied.

A.sub.S/A.sub.B<4

A mixing module includes two inlets, an integrator, and a valve member. The integrator has two chambers each having a near end and a far end, and the valve member is movable between two positions. One of the inlets is connected to the near end of one of the chambers and the other inlet is connected to the near end of the other chamber when the valve is in one position. When the valve is in the other position, one of the inlets is disconnected from the chambers and the near ends of the chambers are connected.

A device for producing a dyed plastic melt and an undyed plastic melt includes a multi-shaft screw extruder, a first metering installation, a second metering installation, and a control installation for selecting between a first operating mode for producing the dyed plastic melt and a second operating mode for producing the undyed plastic melt. The first metering installation serves for feeding an undyed plastic material through a first infeed opening into a housing of the multi-shaft screw extruder, and the second metering installation serves for feeding at least one color granulate through a second infeed opening into the housing. The plastic material is fed exclusively by way of the first infeed opening such that residual color granulate or dyeing agent contained therein, respectively, which is still located in the second metering installation or in the region of the second infeed opening does not contaminate the undyed plastic melt.

A mixing machine (1) for the mixing of a homogeneous mixture with one or more components to obtain a viscous mixture, comprising a mixing chamber (2) which is divided in a push (A), a mixing (B) and a discharge zone (C), and wherein the mixing chamber (2) comprises the following parts: multiple walls, consisting of one or more top plates (22) with multiple inflow channels (10, 11, 12), one or more bottom plates (24) and multiple side walls (6); an outlet mouth (18); an outlet valve (13); several rotors (5); in and out sliding push and/or mixing blades (3, 4); and a self-cleaning system (16, 17); characterised in that the rotors (5) are integrated in the side walls (6) of the mixing chamber (2); the rotors are equipped with transit channels (30) for the in and out sliding push or mixing blades (3, 4); and the self-cleaning system comprises a cleaning plate (16) and a driving mechanism (17) wherein the cleaning plate (16) can move longitudinally through the mixing chamber (2).

A latex processing system and method involves mixing a latex and at least one solvent blend in an extruder, in order to remove resin found in the latex and to coagulate the latex to form a coagulum. The at least one solvent blend has a first solvent configured to coagulate the latex, and a second solvent configured to swell the resulting coagulum. In particular, a series of the solvent blends may be used at different locations along a length of the extruder, and may further include distinct blends of the first solvent and the second solvent, introduced at the different locations, and having different ratios of the first solvent and the second solvent.