A method for manufacturing a plastic fuel tank including: a) inserting a plastic parison including two distinct parts into an open two-cavity mold; b) inserting a core, bearing at least part of a reinforcing element configured to create a link between the two parison parts, inside the parison; c) pressing the parison firmly against the mold cavities, for example by blowing through the core and/or creating suction behind the cavities; d) fixing the part of the reinforcing element to at least one of the parison parts using the core; e) withdrawing the core; f) closing the mold, bringing its two cavities together to grip the two parison parts around their periphery to weld them together; g) injecting a pressurized fluid into the mold and/or creating a vacuum behind the mold cavities to press the parison firmly against the mold cavities; and h) opening the mold and extracting the tank.

The invention relates to a method for producing a tank from thermoplastic material, comprising the following method steps: extruding or providing a hose-like parison composed of plasticized thermoplastic material, and dividing and spreading the parison into two areal extrudate webs, or extruding or providing two parisons in web form, laying-in and molding the parisons in recesses of a multi-part blow-molding tool using differential pressure, wherein the recesses of the blow-molding tool delimit a mold cavity, punching out, or cutting out in a circular shape, at least one opening in at least one shell-like intermediate product, wherein the opening is produced by way of a punching or cutting tool which penetrates through a wall of one of the shell-like intermediate products, wherein in a second separate method step, a first attachment element of a line connection or of a line arrangement is welded, at the mold cavity side, to the wall of the shell-like intermediate product, in such a way that an encircling weld collar of the first attachment element sealingly surrounds the opening, joining the shell-like intermediate products to form a tank, and removing the tank from the blow-molding tool, and connecting a second attachment element, which is complementary to the first attachment element in the context of a plug-type connection, to the first attachment element, wherein the plug-type connection is produced within the contour of the tank as defined by the tank wall.

A multi-sheet component for a utility vehicle that includes at least one gap between at least two of the sheets, thereby providing a component that enhances worker safety by increasing component stiffness and reducing component thickness. The component is manufactured through multi-sheet thermoforming and uses a conical frustum corrugation to increase stiffness.

A method of forming a transparent member according to an embodiment may include: a process of putting a first transparent substrate and a second transparent substrate into a first cavity of a lower mold that has a first depth and a second cavity of a lower mold that is connected to the first cavity and has a second depth, respectively; a process of disposing an upper mold, which corresponds to the lower mold and includes a pressing portion having at least one pressing surface, on an upper portion of the lower mold; a process of preheating at least one of the lower mold in which the transparent substrates are disposed or the upper mold to a predetermined temperature; and a process of thermoforming the preheated transparent substrates by pressing the preheated transparent substrates in a manner of pressing the upper mold. Various other embodiments identified through the specification are possible.

A multi-sheet component for a utility vehicle that includes at least one gap between at least two of the sheets, thereby providing a component that enhances worker safety by increasing component stiffness and reducing component thickness. The component is manufactured through multi-sheet thermoforming and uses a conical frustum corrugation to increase stiffness.

A blow molded article of manufacture includes first and second battery enclosures each having respective first and second laterally outward extending flanges, and a parison made of a polymeric material. The first and second battery enclosure components are disposed facing each other and with their respective first and second laterally outward extending flanges registered with each other and spaced apart from each other by an offset. The parison is sandwiched between and connects together the first and second battery enclosure components, such that the parison conforms with interior surfaces of the battery enclosure components and with the parison substantially filling the offset. The article of manufacture may be cut along a cut line through the parison and within the offset around an outer perimeter of the article of manufacture, thereby separating the article of manufacture into first and second battery enclosure assemblies. Methods of formation are also disclosed.

A composite board has a vacuum molded surface plate (12) and a bottom plate (13). Edges of the surface plate (12) and the bottom plate (13) are fixed into one piece by thermoplastic fixation, and a top wall of each supporting protrusion (135) and a body of the surface plate (12) are fixed into one piece by thermoplastic fixation. The composite board is formed by superimposing at least two layers of boards. A method for manufacturing the composite board provides process guidance for manufacturing the composite board.