A die assembly (5) including: (i) a die plate (10) having an inlet surface (15) and an opposing discharge surface (35); (ii) an inlet (30) on the inlet surface (15) and a first axis of symmetry (A) extending through the inlet (30) and perpendicular to the inlet surface (15); (iii) a discharge port (45) on the discharge surface (35) and a second axis of symmetry (B) extending through the discharge port (45) and perpendicular to the discharge surface (35). The first and second axes are apart from, and parallel to, one another. The die assembly (5) includes (iv) an extrudate passage (42) fluidly connecting the inlet (30) and the discharge port (45). A third axis of symmetry (C) extends through the extrudate passage (42). The die assembly (5) includes (v) a nozzle (100) mounted in the die plate (10), the nozzle (100) having an injection tip (110) in the extrudate passage (42) at the discharge port (45); and (vi) the third axis of symmetry (C) intersects the first axis of symmetry (A) to form an acute angle.

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 mixing and cooling system (1) includes a mixing and screw-extrusion machine (10) with a mixer (12) having a converging conical twin screw; a ram (30) that moves along the inside of an introduction hopper (24) of the machine; a roller nose system disposed just downstream of an outlet (25) of the mixer to form a sheet (112) of the mixture exiting the mixer; and a mobile sleeve or sleeves (34) that move in a linear movement relative to the outlet. The system also includes a cooling system with a spray installation(s) (102, 104) that delivers water at a predetermined rate to the sheet exiting the machine; a suction installation(s) proportionate to each spray installation; and at least one transport means (114, 116) that transports the sheet in a predetermined direction.

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.

Disclosed is an arrangement for granulating polymer material, having a housing with a gas supply line, connected opposite the latter to the housing, having a rectangular cross-section, a granulating unit located at least partially in the housing and having a perforated plate of a feed or plasticising unit feeding into the housing, and a scraper which crushes or separates the material emerging through the recesses of the perforated plate, wherein in a plane running parallel to the plane of the perforated plate, the two lateral wall surfaces of the gas discharge line perpendicular to this plane include an angle α2 with one another, and the two lateral wall surfaces of the gas supply line perpendicular to this plane include an angle α1, wherein the two angles α1, α2 open towards the housing and wherein the angle α1 is greater than the angle α2.

An extruder head for extruding a strand of building material for 3D printing of a structural part. The extruder head has an extruder nozzle with a discharge opening for discharging the strand of building material out of the extruder head in a discharge direction, a specification element designed to be variably adjustable for variably settably specifying at least a part of a strand cross section of the strand of building material being discharged, and a setting apparatus designed for variably setting the at least one specification element. The setting apparatus is designed and arranged such that the extruder head, in a first extent direction which differs from the discharge direction, extends below the discharge opening, in the case of a maximum opening height, by at most the maximum opening height, and/or, in at least one second extent direction differing from the discharge direction, extends to the side of the discharge opening, in the case of a maximum opening width, by at most the maximum opening width.

A system for adjusting a gap in a slot die for producing a polymeric web. The system includes a slot die that has a polymer reservoir that extends between a polymer inlet and a melt outlet. The melt outlet has a first edge and a second edge that each extend longitudinally along the melt outlet. The second edge is opposite the first edge. A plurality of actuators move the second edge along a plurality of positions along a length of the second edge. The first edge is spaced apart from the second edge by a gap that has an adjustable profile. A pressure sensor communicates with the reservoir and measures the pressure of the polymer in the reservoir. A control unit with an algorithm correlates the profile of the gap to the pressure in the reservoir. The algorithm is configured to generate control signals to cause the profile of the gap to be uniform.

A system for adjusting a gap in a slot die for producing a polymeric web. The system includes a slot die that has a polymer reservoir that extends between a polymer inlet and a melt outlet. The melt outlet has a first edge and a second edge that each extend longitudinally along the melt outlet. The second edge is opposite the first edge. A plurality of actuators move the second edge along a plurality of positions along a length of the second edge. The first edge is spaced apart from the second edge by a gap that has an adjustable profile. A pressure sensor communicates with the reservoir and measures the pressure of the polymer in the reservoir. A control unit with an algorithm correlates the profile of the gap to the pressure in the reservoir. The algorithm is configured to generate control signals to cause the profile of the gap to be uniform.

A micronizing apparatus for hydrogel of super absorbent polymer includes: a body having a transfer space where hydrogel is transferred, and a discharge space where ground hydrogel is discharged; a first rotation shaft disposed in the transfer space, wherein at least one screw is formed on an outer perimeter surface of the first rotational shaft to transfer the hydrogel along a longitudinal direction of the body; a hole plate fixed to the body and having a plurality of through holes; and a second rotation shaft disposed in the discharge space, wherein a cutter is attached and spaced from the hole plate by a predetermined distance, to grind the hydrogel transferred by the screw, wherein a rotation speed of the first rotation shaft and a rotation speed of the second rotation shaft may be independently controlled.

Methods and an apparatus are presented. A bulk molding compound is consolidated by sending the bulk molding compound through a die breaker and an extrusion die of a consolidation system.