Method of blow moulding a container from a hollow, elongated parison of a thermoplastic material, wherein the method comprises: -arranging the parison in a closed moulding equipment comprising a moulding cavity and at least one aperture, wherein the at least one aperture provides an opening into the moulding cavity from outside the closed moulding equipment, wherein the circumference of the at least one aperture is larger than or equal to a circumference of the parison, such that a first section of the parison is arranged inside the moulding cavity, a second section of the parison is arranged within the at least one aperture and a third section of the parison is arranged outside the closed moulding equipment, -closing a shutter system around the third section of the parison, thereby pinching the parison and providing a closed volume inside the first and second sections of the parison, -arranging a blow conduit in fluid communication with the closed volume inside the second section of the parison, -blowing pressurised gas from the blow conduit into the first and the second section of the parison, thereby forming first and second blow moulded sections, wherein the first blow moulded section is the container, and -separating the second blow moulded section from the first blow moulded section, thereby providing an opening in the container.

The present invention is a double-walled container manufacturing method in which when a pair of partial molds is brought towards each other to be assembled to form a split mold, at least a portion of the mating surfaces of the pair of partial molds clamp a parison at two side portions that are at horizontal positions facing each other. The method is able to manufacture the container easily with a molding device that does not differ significantly from the past and, in a double-walled container obtained from a relatively rigid outer container and a flexible inner container the volume of which can change according to the amount of contents filled inside said outer container, an opening for introducing outside air can be formed very easily and reliably at a lower cost than the processing cost of prior art.

The present invention is a double-walled container manufacturing method in which when a pair of partial molds is brought towards each other to be assembled to form a split mold, at least a portion of the mating surfaces of the pair of partial molds clamp a parison at two side portions that are at horizontal positions facing each other. The method is able to manufacture the container easily with a molding device that does not differ significantly from the past and, in a double-walled container obtained from a relatively rigid outer container and a flexible inner container the volume of which can change according to the amount of contents filled inside said outer container, an opening for introducing outside air can be formed very easily and reliably at a lower cost than the processing cost of prior art.

A blow molding device in which pressure is accumulated in advance in a cylinder, which is used for providing pressurized an air space about a mouth of a preform to be molding into a container within a mold using a pressurized liquid. Pressure is also accumulated in advance in an accumulator. When a pressurized liquid is supplied into the preform, the opening-closing valve of the accumulator is opened to thereby apply the accumulated pressure within the accumulator to the liquid supplied into the preform, and the opening-closing valve is closed to thereby allow the accumulated pressure within the cylinder to pressurize the air space.

A blow molding device in which pressure is accumulated in advance in a cylinder, which is used for providing pressurized an air space about a mouth of a preform to be molding into a container within a mold using a pressurized liquid. Pressure is also accumulated in advance in an accumulator. When a pressurized liquid is supplied into the preform, the opening-closing valve of the accumulator is opened to thereby apply the accumulated pressure within the accumulator to the liquid supplied into the preform, and the opening-closing valve is closed to thereby allow the accumulated pressure within the cylinder to pressurize the air space.

The present invention relates to molded foam having no hollow space caused in a plate-shaped portion. The molded foam comprises a tube body and a plate-shaped portion joined to the outer side of the tube body. The expansion ratio of the molded foam is lower than two, and a value of a thickness B/a thickness A as a relationship between the thickness A of the tube body at the periphery of a point joined to the plate-shaped portion and the thickness B of the plate-shaped portion is less than 2.82.

A production device for a fuel tank, having two or more built-in components attached to an inside of a fuel tank body when the fuel tank body is formed, includes: jigs configured to have the built-in components placed thereon; and a feed robot, as a feed device, configured to feed the built-in components, along with the jigs having the built-in components placed thereon, to a position below molding dies. The feed device may feed the jig, having the built-in components placed thereon, to the position via a subsurface feed path leading to the position.

A method of sub-ambient pressure processing of blow-molded polymer foams and skin-over-foam sandwich panel configurations for lightweight components having improved structural properties. The method can create either skinned or un-skinned foams that offer smooth interior and exterior surfaces, zero or controlled surface porosity, skins of pre-defined thickness, and foam cells that are expanded and oriented normal to the material plane, effectively spherical or polyhedral in nature, and offering improved bending and compressive strength.

A blow nozzle for supplying compressed air to the internal cavity of a preform, the blow nozzle including a tube having a first layer, a second layer, and a third layer, the first layer being radially wider and having a larger diameter than the second layer, the second layer being disposed between the first and third layers, and the second layer being radially wider and having a larger diameter than the third, and a plurality of holes disposed on the third layer for directional blowing of the compressed air into the preform, when the nozzle is inserted into a neck opening of the preform and rests in a blow molding position.

A blow nozzle for supplying compressed air to the internal cavity of a preform, the blow nozzle including a tube having a first layer, a second layer, and a third layer, the first layer being radially wider and having a larger diameter than the second layer, the second layer being disposed between the first and third layers, and the second layer being radially wider and having a larger diameter than the third, and a plurality of holes disposed on the third layer for directional blowing of the compressed air into the preform, when the nozzle is inserted into a neck opening of the preform and rests in a blow molding position.