The disclosure relates to an alternative joining method and to the use of the shaped part produced by means of the alternative joining method in drive technology and connection technology.

A method of manufacturing a composite member including an aluminum member and a fiber-reinforced resin member bonded to each other, the method including: performing blasting on a surface of the aluminum member; modifying the surface of the aluminum member into aluminum hydroxide, the modifying including causing the surface of the aluminum member having undergone blasting to react with water by using at least one of heat and plasma; and directly bonding the fiber-reinforced resin member to the surface of the aluminum member modified to the aluminum hydroxide.

A polymer film assembly includes a stack of two or more polymer films. At least one of the polymer films includes directionally oriented molecules. The stack includes a first polymer film and a second polymer film layered with the first polymer film. A contracted bond assembly couples the first and second polymer films of the stack. The contracted bond assembly includes heated and contracted configurations. In the heated configuration the contracted bond assembly includes a bond fusion zone and a film interface having directionally disoriented molecules and an interface width between the bond fusion zone and the remainder of the first and second polymer films. In the contracted configuration the film interface is a contracted film interface having a contracted interface width less than the interface width and a contracted thickness greater than one or more of film thicknesses of the first or second polymer films.

An assembly (1) for protecting an acoustic device comprises an expanded polytetrafluorethylene (ePTFE) membrane (3) and first and second polymeric substrates (2, 4) disposed on opposing sides (5, 6) of the membrane (3). The first substrate (2) is transmissive for laser light of a predetermined wavelength, and the membrane (3) is joined to the first and second substrates (2, 4) by first and second laser weld joints (9, 10) on the first side (5) of the membrane (3) and the second side (6) of the membrane (3), respectively, that are created in a single laser transmission welding step through the first polymeric substrate (2) towards the second polymeric substrate (4). The first side (5) of the membrane (3) may be at least partially absorbent for the laser light and the second side (6) may be at least partially transmissive for the laser light. This may be achieved by a color gradient from black to white from the first side (5) to the second side (6).

The invention relates to a method of fabricating acetate eyeglass frame fronts with a frame curvature and consequent lens seats, which is customized to conform with the curvature of the lenses to be fitted into said seats which, according to the visual defect to be corrected, may have different, possibly asymmetric, curvatures.

The invention also relates to the frames with curved fronts obtained with the method.

Fabrication is carried out by electronically controlled milling operations from an acetate plate (1), having predetermined thickness (S), length (L) and height (H) values, on which additional elements (2, 3, 4, 5) made of the same material, possibly of different colors, are applied, which are attached at least proximate to the end sides of the length extent (L) of the plate at the lens seats. Such additional elements help to locally increase the thickness (S) of the plate to a value (S1) that accommodates the dimensions that the frame shall have as a result of the curvature of the front at the lens seats, relative to the middle region, once the milling operations have been completed.

The additional elements (2, 3, 4, and 5) are pre-cut and then stably fixed to the plate (1) by direct friction welding on the plate, without using chemicals or adhesives.

Provided is a method for producing a laminate, comprising laminating an aramid paper sheet and a polyimide film together by performing heating and pressurizing process under conditions of a temperature of 275 to 320 C. and a pressure of 50 to 400 kgf/cm. In the present invention, an aramid paper sheet-polyimide film laminate with excellent heat resistance, electrical properties, chemical resistance, mechanical properties, and the like can be manufactured by laminating the aramid paper sheet and the polyimide film in a simple method without impairing their properties.

A foam assembly system is provided. The system is configured to heat a surface of foam. After the heating of the foam, an adhesive is applied, typically a high solids adhesive. The foam is then bonded to another foam surface. It has been found that the pre-heating of the foam before adhesive application greatly enhances the bond strength between the foam and the second foam surface to which it is adhered.

The present specification relates to a joint body of different materials, and a method of manufacturing the same. The joint body includes a metal layer; and a resin layer provided on and in contact with one surface of the metal layer. The metal layer comprises two or more etching grooves and two or more burrs provided on a surface of the metal layer adjacent to the etching grooves.

An ultrasonic welding method for joining a first thermoplastic part and a second thermoplastic part without causing visible read-through on an exposed surface of the second part. The method includes arranging the first part on an inner surface of the second part. The inner surface is opposite the exposed surface. The first part has an interface portion contacting the inner surface. The method includes causing a horn of an ultrasonic welding stack to be pressed against the first part by applying ultrasonic energy oscillating at a frequency in a range of 45-70 kHz through the horn, to thereby join the first part and the second part together. The horn has at least one protruding distal portion configured to penetrate through the first part as the ultrasonic energy is imparted through the horn. The distal portion has a length longer than a thickness of the first part. A collapse distance of a weld formed at the interface portion is less than the thickness of the first part, to avoid read-through effects on the exposed surface of the second part.

A rivet connection has a hollow rivet composed of plastics material and connects a first component to a second component. The first component has a first surface and the second component has a second and third surface. The first surface and the second surface bear on one another. The second component has a first opening between the second and the third surface. The hollow rivet has a tubular component having a lateral wall, a cavity, a first end and a second end. Part of the tubular component is disposed in the first opening of the second component. The second end of the tubular component protrudes beyond the second component. The lateral wall of the tubular component adjacent the first opening of the second component is heated and compressed and configures an outwardly bulging region. Part of the outwardly bulging region contacts the third surface of the second component.