A method for recycling a carbon fiber-reinforced resin including a carbon fiber and a matrix resin is provided, and the method includes: a first heating step of heating the carbon fiber-reinforced resin to decompose the matrix resin so as to obtain an intermediate in which the decomposition residue of the matrix resin is adhered to the carbon fiber; an unwinding step of unwinding an intermediate fiber from the intermediate; a second heating step of heating the unwound intermediate fiber to decompose the decomposition residue of the matrix resin adhered to the intermediate fiber so as to obtain a recycled carbon fiber; and a winding step of winding the recycled carbon fiber.

Provided is a composite inner frame multi-bonded barrel, a shell-integrated projectile propellant tank including the same, and a method for manufacturing the barrel and the tank. The shell-integrated projectile propellant tank may include the composite inner frame multi-bonded barrel including a cylinder portion including a plurality of inner frames bonded together; a dome portion including an upper dome frame and a lower dome frame bonded to an upper end and a lower end of the cylinder portion, respectively; a cylindrical shell coated on an outside of the composite inner frame multi-bonded barrel; and at least one manhole cover sealing a manhole cover coupling hole formed in a center of the upper dome frame or the lower door frame, and the at least one manhole cover has a fluid injection port formed on one side thereof.

An infrared welding machine has a heating device that heats and melts at least one of an end surface of a first member made of resin and an end surface of a second member made of resin, called a surface-to-be-heated, with infrared rays. The heating device includes: a lamp that is disposed so as to face the surface-to-be-heated without coming into contact with the surface-to-be-heated and has a circular shape in cross-section such that the lamp radiates infrared rays in all radially outward directions; an upper-side reflective member that reflects infrared rays radiated from the lamp toward the upper side of the surface-to-be-heated so as to direct the infrared rays toward the surface-to-be-heated; and a lower-side reflective member that reflects infrared rays radiated from the lamp toward the lower side of the surface-to-be-heated so as to direct the infrared rays toward the surface-to-be-heated.

A mandrel for manufacturing a fiber reinforced resin vessel by a filament winding process includes: a tubular part; and a pair of end parts joined to respective axial ends of the tubular part. The tubular part and the end parts are each made of a molded product of a material including pulp and a starch-based binder.

A parison separation device (30) according to an embodiment includes a cutter (31) with a cutting edge (35), the cutting edge (35) extending in a one direction and facing upward, and a block (33), the cutter being attached to an upper part of the block (33), inclined surfaces (37) being formed on both sides of the block (33) in a thickness direction of the cutting edge (35), each of the inclined surfaces (37) including a component that is inclined increasingly downward as it gets closer to one direction side end, in which the parison separation device (30) is disposed on a discharging direction side of a discharging port of a parison and configured to cut the parison discharged from the discharging port.

A method of making a multi-section tank with composite material includes pre-tensioning the composite material, wrapping a soluble tool in the composite material, and curing the composite material around the soluble tool. The composite material is pre-tensioned with force to align fibers in the composite material.

A method for producing a plastic container, and a plastic container. The method includes heating a container wall of the plastic container at least in a fastening region thereof, and then producing a form-fit connection between the container wall and at least one insert having a fastening surface with a plurality of retaining geometries which protrude from the fastening surface. The form-fit connection is produced by pressing the fastening surface of the insert part against the heated fastening region of the container wall such that the retaining geometries penetrate into the container wall without penetrating through the container wall, free ends of the retaining geometries come to lie inside the container wall, and the plastic of the container wall is arranged between the retaining geometries.

A method of and fixture for molding a product with an embedded ring. A system for molding a ring into a product including a rotational molding mold with an opening formed in the rotational molding mold sized to fit a ring. A fixture is removably couplable to the ring, wherein the ring and the fixture when coupled are removably couplable in the opening. The fixture is removed from the ring after the ring is molded into a product. A method of manufacturing a product with an embedded ring includes: coupling a ring to a fixture; clamping the fixture and the ring in an opening in a mold top; clamping the mold top to a mold bottom; rotomolding a product; unclamping the fixture from the mold top; uncoupling the fixture from the ring; unclamping the mold top and the mold bottom; and removing the product from the mold.

The invention relates to a polyamide composition comprising: a. A semi-crystalline polyamide; b. An impact modifier in an amount ranging from 1 wt % to 50 wt %; c. A branching agent in an amount ranging from 0.01 to 6.0 wt %; d. An inorganic stabilizer in an amount ranging from 0.01 wt % to 2.0 wt %; e. An organic stabilizer E1 comprising a primary antioxidant group in an amount ranging from 0.01 wt % to 2.0 wt and an organic stabilizer E2 comprising a hindered amine group in an amount ranging from 0.01 wt % to 4.0 wt %; or an organic stabilizer E3 comprising a primary antioxidant group and a hindered amine group in an amount ranging from 0.02 to 6.0 wt %; or a combination of E1, E2 and E3 in a total amount of 0.02 to 6.0 wt %; wherein all wt % are based on the total amount of polyamide composition. The invention also relates to a process for preparing a container by blow molding this composition, as well as use of the container in various applications.

A method of and fixture for molding a product with an embedded ring. A system for molding a ring into a product including a rotational molding mold with an opening formed in the rotational molding mold sized to fit a ring. A fixture is removably couplable to the ring, wherein the ring and the fixture when coupled are removably couplable in the opening. The fixture is removed from the ring after the ring is molded into a product. A method of manufacturing a product with an embedded ring includes: coupling a ring to a fixture; clamping the fixture and the ring in an opening in a mold top; clamping the mold top to a mold bottom; rotomolding a product; unclamping the fixture from the mold top; uncoupling the fixture from the ring; unclamping the mold top and the mold bottom; and removing the product from the mold.