A device for ascertaining the corrosiveness of a plastic melt, including a housing having a cavity to be filled with plastic melt; a first electrode made of a first material and a second electrode made of a second material, the first electrode and the second electrode each having a contact surface toward the cavity, the standard potential of the first material being higher than that of the second material, and the first electrode and second electrode additionally being connectable to each other via a measuring element for determining an electric current and/or an electric voltage between the contact surfaces.

An extrusion foaming device uses pressurized working fluid as a self-sealing medium between a foaming extruder and an extrusion screw transport section in a feed tube. Shaft diameter of the extrusion screw increases in a compression section such that material therein is compressed. Material from a foaming extruder is split between the compression and transport sections and a bypass valve connected to both sections allows adjustment of pressure in the compression section and the valve. Keeping pressure above saturation pressure of a dissolved supercritical fluid in the working fluid inhibits precipitation thereof and intrusion of precipitate into the extrusion section.

A method of manufacturing bulked continuous carpet filament which, in various embodiments, comprises: (A) grinding recycled PET bottles into a group of flakes; (B) washing the flakes; (C) identifying and removing impurities, including impure flakes, from the group of flakes; (D) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 1.5 millibars; (E) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (F) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.

Silicone tube structures are formed having a particular dimensional accuracy. In one embodiment, a silicone tube structure can include an extruded hollow body having an inner bore. The extruded hollow body can have an inner diameter, an outer diameter, and a length of at least approximately 20 m. The extruded hollow body can also have a dimensional accuracy that is measured by the standard deviation of the inner diameter being no greater than approximately 0.8% of an average inner diameter of the extruded hollow body over the length. In an embodiment, the silicone tube structure can be cut to form a number of silicone tubes.

A multi-screw extruder includes a drive mechanism operable to output a torque through a drive shaft, a plurality of extruder screws each operably coupled to the drive shaft to rotate in response to the torque, each of the extruder screws and including a shaft and a thread, an elongated barrel body defining a plurality of isolated screw compartments extending therethrough and each receiving one of the plurality of extruder screws therein, each screw compartment isolated from each of the other screw compartments along a length of the barrel body, a heater substantially circumscribing each of the screw compartments and operable to provide a heat flux into each of the screw compartments, a common collection chamber in fluid communication with each screw compartment, and a nozzle in fluid communication with the common collection chamber including a material outlet through which a molten printing material may be discharged from the extruder.

A signal acquisition unit of an abnormality detection device for a twin-screw extrusion molding machine, when the twin-screw extrusion molding machine that melts and kneads a fed resin raw material is in operation, acquires an AE output of an AE sensor installed on a surface of a housing of the twin-screw extrusion molding machine. A determination unit determines whether an abnormality occurs in the twin-screw extrusion molding machine, based on a relationship between the AE output and a first threshold and a second threshold.

Disclosed is a method for preparing a three-layer-co-extruded diaphragm of a lithium-ion battery, falling into lithium-ion battery diaphragm technical field. The annealing box used comprises: box body, motor and sealing over, with uniformly-arranged heating plates fixedly connected to inner surface of the box body, a driving shaft arranged horizontally within the box body in front-back direction, a first and second driven shafts arranged on the left and right sides of the driving shaft correspondingly within the box body, an interlayer film coiling connected between the driving shaft and the first driven shaft within the box body horizontally; a diaphragm coiling connected between the driving shaft and the second driven shaft within the box body slantwise. Controllable annealing temperature and insulation from external environment avoid influence of external environment on diaphragm and ensure uniform heating of diaphragm. It produces a diaphragm of stable quality and is convenient to be mass-produced.

The present invention relates to a method for continuously manufacturing UHMWPE products comprising:providing a counter-rotating twin-screw extruder;feeding UHMWPE powder into a hopper of said counter-rotating twin-screw extruder;transporting said UHMWPE powder from said hopper through said counter-rotating twin-screw extruder to an outlet of said counter-rotating twin-screw extruder;further transporting said UHMWPE powder from said outlet of said counter-rotating twin-screw extruder to an entrance of a heat-controlled tooling system for defining the shape of UHMWPE products;withdrawing said UHMWPE products from an outlet of said heat-controlled tooling system.