Apparatus for injection of fluid into an extruder is provided, including a static mixer section with a pipe assembly coupled with the static mixer outlet and leading to the extruder barrel; the pipe assembly outlet and barrel injection opening have diameters less than the maximum internal diameter of the static mixer casing. The invention greatly simplifies the fluid injection apparatus used with extruders, while giving more efficient absorption of thermal energy with a minimum of environmental contamination, and the ability to inject multiple streams into the extruder.

A plasticizing unit includes an injection cylinder having a dispensing opening, via which a plasticized material can be dispensed, and a plasticizing screw arranged to be rotationally and linearly movable in the injection cylinder and having an axis of rotation. A plasticizing zone is formed between the plasticizing screw and the injection cylinder in the radial direction relative to the axis of rotation of the plasticizing screw. The plasticizing screw has a dam element, and in the injection cylinder there is a first opening in the area of the plasticizing zone and/or the dam element and a second opening between the dam element and the dispensing opening.

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.

In a kneading extrusion apparatus according to an embodiment, when an extruder is started in order to manufacture a resin compound, an amount of a resin raw material to be supplied is increased with an increase in a rotation speed of a screw of the extruder based on a predetermined starting-time supply pattern for the resin raw material, and a supply of the filler is started after the supplying of the resin raw material is started and an amount of the filler to be supplied is increased with the increase in the rotation speed of the screw based on a predetermined starting-time supply pattern for a filler.

A device for carrying out mechanical, chemical, and/or thermal processes in a housing (3), comprising mixing and cleaning elements (5) on at least two shafts (1, 2), the mixing and cleaning elements (5) on the shafts (1, 2) meshing with each other and being equipped with disk elements that include kneading bars. The number of disk elements including kneading bars is adjusted to the speed ratio between the shafts.

In the manufacturing method and manufacturing arrangement according to the invention for a silicone composition the mixer mixing the different subcomponents of the silicone composition are removed for the duration of downtime and cooled to a temperature, in which the chemical reaction between the different subcomponents of the silicone composition stops. In the manufacturing method of the invention the mixer is reconnected to the manufacturing apparatus arrangement after downtime without cleaning it from the silicone composition subcomponents remaining in the mixer.

A method for inline resin mixing includes establishing a flow of a mixed resin, initially directing the mixed resin to a first intermediate volume and subsequently directing the mixed resin to a second intermediate volume after a predetermined triggering event relating to a continuing flow of the mixed resin. A mixed resin retention assembly for inline resin mixing includes an inlet spout and an intermediate vessel. The inlet spout receives a flow of the mixed resin. The intermediate vessel includes the first and second intermediate volumes. A valve assembly for inline resin mixing includes an exterior body, an interior body and a cover. The exterior body includes three input ports and an output port. The interior body is disposed within an interior cavity of the exterior body and defines five flow paths extending from a periphery and intersecting at a central portion of the interior body.

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 composite lumber comprising a curable polymer and renewable natural materials, from a plant-based and/or tree-based source, as well as a method for manufacturing the same. In a preferred embodiment, the composite lumber is cast to a specific size and shape, for example as commonly utilized in commercial or home building industries. The composite lumber includes different sizes of natural materials which impart desirable properties thereto. In one embodiment, the method of the invention incorporates the different-sized natural materials in a sequential order based on size, starting from the smallest size.