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Methods for 3D printers and 3D printer equipment
A method for a 3D printer is provided. The 3D printer includes a print head defining a filament channel with a first end and an opposite second end for filament melting, and the filament channel is formed by joints of multiple print head components with seams; an extruder for feeding filament into the channel from
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A mandrel material for rocket engine propellant grain molding and its preparation method
The invention relates to the field of conductive plastics, especially to a core mold material for grain column molding of rocket engines and its preparation method. The core mold material is composed of the following raw materials in parts by weight: 100 parts of plastic particles, 10‑25 parts of high-conductivity filler, 5‑15 parts of reinforcing
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Apparatus and method for preventing extruder vacuum backflow
The invention provides a device and a method for preventing material backflow in the vacuum section of an extruder. The device includes an extruder barrel, a vacuum cavity assembly, a vacuum pumping assembly and a safety valve. The safety valve consists of a valve sleeve assembly, a valve core assembly and a thermal induction actuator.
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An apparatus and method for manufacturing functional rubber strips
The invention belongs to the technical field of rubber strip manufacturing, and specifically relates a production device and method for functional rubber strips. The device includes a first precision extruder for main material mixing, a second precision extruder for auxiliary material mixing, a heating die sleeve, a multi-functional speed measuring device and an automatic winding
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Methods for manufacturing containers
The invention relates to a method for manufacturing a container comprising a substantially rigid outer container and a deformable inner bag, wherein the outer container and the inner bag are made of a first thermoplastic material and a second thermoplastic material. The preform is positioned between the open mold halves of a blow mold. When
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A method for preparing polyurethane foam
The invention develops a preparation method of polyurethane sponge, which abandons traditional foaming processes. Instead, one-component moisture-curable polyurethane resin, water-soluble inorganic salt, starch, silicone microspheres, nonionic surfactants with an HLB value of 4‑15 and solvents are internally mixed, extruded through a die by an extruder, and then immersed in clean water to dissolve out calcium
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