Disclosed are embodiments of a three-dimensional (3D) printer for building 3D objects with layer based, additive manufacturing techniques. The hot end can be moved in a horizontal plane parallel a planar printing surface of the printing bed while the printing bed can be moved perpendicular to the planar printing surface to print a 3D object. The hot end can be part of an extrusion guide assembly. The 3D printer can auto-level the printing bed.

According to the present invention, provided is a foam molding resin containing low-density polyethylene, wherein a strain hardening degree of the low-density polyethylene is equal to or more than 0.40.

A heating apparatus for at least one housing section of a screw extruder comprises at least two heating elements which are connected to contact plugs via connection lines. For the purpose of supplying power, the heating apparatus comprises an electrical supply line which is connected to a plug-in contact distributor. The plug-in contact distributor comprises at least two plug-in contacts. The contact plugs are releasably connected to the plug-in contacts. The heating apparatus renders possible simple exchange of a heating element and is therefore easy to service. The modular construction of the heating apparatus renders possible flexible use.

A device (100) for forming a complex product of a profiled product produces a complex product from non-protruding rubber layers. There is also a process for forming a complex product of a profiled product from non-protruding rubber layers, performed by the disclosed device (100). A tire production line can include at least one installation (500) having the device (100).

The invention herein pertains to a device and system for controlled mixing of textured material along a linear path by means variable ohmic controls. The device comprising the following components: a dual auger unit wherein two linear augers are held within a single linear casing, each said linear augers having an increased diameter pitch along its length, perforations along the length of said single linear casing, electro-conductive plates attachable to each said perforation. The preferred embodiment of this invention is intended to be used for mixing pasta filata cheese curds to form a singular cheese mass with consistent texture. The device may also be used to mix other types of fluid textured material including food and non-food substances.

The present invention provides a foam diffuser plate, including a foam core layer, the upper surface and the lower surface of the foam core layer are covered with a protective layer, and the thickness ratio of the foam core layer to the upper and lower surfaces of the protective layer is 1:7-9:1. The mass percentage of each raw material of the protective layer is PS raw material 90-99%, stabilizer 0.01-1%, organosilicon 0.1-3%, inorganic diffusing agent 0.1-3%, diffusing oil 0.1-3%, styrene-butadiene copolymer 0.1-2%, and magnesium silicate mineral 0.1-6%. The mass percentage of each raw material of the foam core layer is GPPS raw material 95-99%, antioxidant 0.3-0.6%, silicone diffusing agent 0.6-1%, foaming agent 0.5-2%, anti-UV agent 0.3-0.6%, toughening agent 0.5-2%, stabilizer 0.3-0.6%, and nucleating agent 1-5%. A manufacturing method of the foam diffuser plate is provided in the present invention as well.

A barrel of a plastics extruder or a plasticizing cylinder of an injection-molding machine includes the barrel or cylinder having a wall, at least one spiral recess formed in the wall, and at least one heating element arranged in one spiral recess. The barrel or cylinder has at least one cooling element arranged in another spiral recess and the spiral recesses extend parallel to one another along the surface of the barrel or cylinder. Also, the cooling element is formed as a tube and the tube is or can have a liquid cooling medium flowing therethrough.

A method of extruding filament comprises the steps of cutting a bulk source material into pieces having size S.sub.1, performing a first extrusion pass comprising the steps of melting the pieces in an extruding device at a temperature T.sub.1 and extruding a first filament at an extrusion speed V.sub.1, and performing at least one additional extrusion pass k comprising the steps of cutting the first filament into pieces having size S.sub.k, melting the pieces in an extruding device at temperature T.sub.k, and extruding a final filament at an extrusion speed V.sub.k. A system for extruding filament is also described.

A consolidation system configured to consolidate a bulk molding compound, the apparatus comprises a barrel, a low compression first stage within the barrel, a high compression second stage within the barrel coupled with the low compression first stage, a die breaker coupled to the high compression second stage, and an extrusion die coupled to the die breaker. The low compression first stage includes a low compression screw for mixing and compressing a bulk molding compound comprising a resin and fillers. The high compression second stage includes a high compression screw for compressing the bulk molding compound into a compressed material. The die breaker comprises at least one of a plurality of holes or a plurality of slots.

A method of making thermoplastic polymer particles may include mixing in an extruder a mixture comprising a thermoplastic polymer and a carrier fluid that is immiscible with the thermoplastic polymer at a temperature greater than a melting point or softening temperature of the thermoplastic polymer and at a shear rate sufficiently high to disperse the thermoplastic polymer in the carrier fluid; cooling the mixture to below the melting point or softening temperature of the thermoplastic polymer to form solidified particles comprising thermoplastic polymer particles having a circularity of 0.90 or greater and that comprise the thermoplastic polymer; and separating the solidified particles from the carrier fluid.