An automatic bonding apparatus and a method for thermally induced seam bonding of weldable and/or gluable flat flexible material layers with each other which are each configured as a material web, material band and/or material piece and arranged so that they overlap at least partially wherein the bonding is performed by an electrically controlled contact heating arrangement through a heating wedge welding method. A temperature and/or a power of the heating wedge which is formed by a thin folded steel sheet blank is controlled as a function of a relative velocity between the material layers and the automatic bonding apparatus. This is performed so that a thermal energy that is transferred from the heating wedge to the material layers to be glued is kept constant. For this purpose the relative velocity is detected and the power of the heating wedge is automatically adjusted when the relative velocity changes.

A high-moisture-permeability, microporous plastic film randomly having a lot of recesses having different opening diameters and depths, with clefts formed in the recesses, is produced by pressing a first pattern roll randomly having a lot of high-hardness, fine particles having sharp edges on a roll body surface to a flat-surface metal roll, to produce an anvil roll randomly having a lot of recesses on a metal roll surface; arranging a second pattern roll randomly having a lot of high-hardness, fine particles having sharp edges on a roll body surface oppositely to the anvil roll; and passing a plastic film through a gap between the second pattern roll and the anvil roll.

In one example, a method includes positioning a tool in a mold, forming a parison of melted plastic, closing the mold around the parison and tool such that part of the tool is positioned between a portion of the mold and the parison, creating a blow molded structure by inflating the parison so that the melted plastic comes into contact with an interior portion of the mold and into contact with the tool, and after the mold is closed, operating the tool to form an integral compression molded element within the mold, and a parting line formed by the mold in the blow molded structure forms no part of the integral compression molded element.

An object of the present invention is to propose a bending die capable of creating a product without causing buckling, even if the shape of the product is long or bent freely in three-dimensional space. The bending die according to the present invention is a bending die having a smooth shape formed by virtually and continuously moving, in three-dimensional space, a profile including a substantially circular-shaped first closed curve having a recess portion, wherein an opening width b of the recess portion is shorter than a groove width a of the recess portion, a tube insetting portion is formed by the recess portion, and the smooth shape is realized and created in real space using a three-dimensional printing technique.

The present invention relates to a mold bottom extending about a central axis and comprising a molding wall made as a single piece and defining a molding surface; a cavity formed inside the molding wall, and having a central area, a peripheral area, and a middle area; a central pipe supplying the cavity with heat-transfer fluid, that opens in the central area via one or more central openings; and at least one pipe for discharging the heat-transfer fluid from the cavity, into which the peripheral area opens. According to the invention, the mold bottom comprises a bypass that brings the central pipe into direct communication with the middle area of the cavity by bypassing the central area.

Described herein are expandable foaming molds. The foaming molds described herein permit mold boundaries to expand along with the expanding polymer and thereby conform to the foaming dynamics of the polymer material. By modifying the temperature and pressure applied to the mold devices described herein, the properties of the resulting foamed polymer can be fine-tuned for specific applications.

A method for molding a part includes forming a mold having a part cavity and an associated electromagnet, placing resin in the part cavity, the resin including a ferromagnetic pigment, energizing the electromagnet and moving the ferromagnetic pigment towards an A-surface area of the part, and curing the resin with the ferromagnetic pigment concentrated at the A-surface area of the part. The A-surface of the part is free of flow marks and dark spots. Also, the ferromagnetic pigment is introduced into the resin before the resin is placed in the part cavity, or in the alternative, the ferromagnetic pigment is introduced into the resin after the resin is placed in the part cavity.

The present invention relates to a (meth)acrylic mixture for impregnating a fibrous substrate, characterized in that it comprises: a) a first dispersion comprising at least one (meth)acrylic polymer obtained by emulsion polymerization of one or more (meth)acrylic monomers, b) a second dispersion comprising at least one flame retardant. The invention also relates to a method for impregnating a fibrous substrate with a (meth)acrylic mixture of this kind, and to a method for manufacturing mechanical parts or structured elements, or articles, from the (meth)acrylic mixture. Another objective of the invention is a mechanical part or a structured element or an article made of composite material, obtained by the implementation of the manufacturing method.

Techniques for producing panels such as for use in a vehicle, boat, aircraft or other transport structure or mechanical structure using a 3-D-printed tooling shell are disclosed. A 3-D printer may be used to produce a tooling shell containing Invar and/or some other material for use in molding the panels. A channel may be formed in a 3-D printed tooling shell for enabling resin infusion, vacuum generation or heat transfer. Alternatively, or in addition to, one or more hollow sections may be formed within the 3-D printed tooling shell for reducing a weight of the shell. The panel may be molded using the 3-D printed tooling shell.

Techniques for producing panels such as for use in a vehicle, boat, aircraft or other transport structure or mechanical structure using a 3-D-printed tooling shell are disclosed. A 3-D printer may be used to produce a tooling shell containing Invar and/or some other material for use in molding the panels. A channel may be formed in a 3-D printed tooling shell for enabling resin infusion, vacuum generation or heat transfer. Alternatively, or in addition to, one or more hollow sections may be formed within the 3-D printed tooling shell for reducing a weight of the shell. The panel may be molded using the 3-D printed tooling shell.