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.

An ultrasonic sealing method and device for a bag, in which pressurized gas spray outlets (47, 52) are provided at distal ends of a horn (31) and an anvil (32) so as to be used as gas blowing nozzles, the distal ends of the horn and the anvil are placed against a cutout (19) formed in a gas compartment (16) of the bag, a gas is blown into the gas compartment to inflate it, and then the horn and the anvil clamp films surrounding the cutout while the gas blowing is in progress, so that ultrasonic sealing is carried out by the horn to the films to trap the gas inside the gas compartment. A contact member (71) is provided directly under the horn. The contact member is pressed against inflated film (18) of the gas compartment, and in this state ultrasonic vibration energy is supplied to the horn.

A part assembly including a curing shield and a method for secondarily bonding two parts of the part assembly utilizing the curing shield. The method for secondary bonding includes fixing a base of a clip of a curing shield to a first surface of a first part. The curing shield includes a pad fixed to the clip. The clip has the base and a spine fixed to and extending away from the base and terminating at a distal end. The pad extends along at least a portion of a length of the spine between the base and the distal end. The method also includes applying adhesive along a faying surface of one of the first part and a second part. The second part is assembled to the first part along the faying surface so that the distal end of the clip extends toward the second surface and the curing shield defines a pocket adjacent the faying surface at least partly enclosed by the pad.

A lining drum which has a tubular body having open ends, an inlet for compressed air and an outlet for liner is disclosed. The lining drum has end pieces removably attached to the tubular body for closing the open ends of the tubular body, a rotatable shaft inside the tubular body and a crank for rotating the shaft. An elastic fastener has a first end in operative engagement with the tubular body and a second end in operative engagement with the end piece. The second end is opposite the first end. The end piece is movable between a closed position and an open position by extending the elastic fastener against an elastic biasing force of the elastic fastener. The end piece and the tubular body has a gap defined therebetween when the end piece is in the open position.

Parts (10) for connection to at least one further part (30, 30). The part (10) has at least two weld sections (11, 11) to be welded individually to at least one of the further parts (30, 30) by vibration welding. Each weld section (11, 11) has at least one weld surface (13, 13), for connection to the corresponding further part (30, 30), and is spatially separated from each other weld section (11, 11) by at least one vibration decoupling zone (14, 14, 23, 26). The part (10) has a particular arrangement of the weld section (11, 11) with respect to the center of gravity (S) or has a particular mass distribution with respect to the weld section (11, 11). Methods for connecting a part to at least one further part (30, 30) and a composite part (90) containing a part (10) and a further part (30, 30) are also disclosed.

A part assembly including a curing shield and a method for secondarily bonding two parts of the part assembly utilizing the curing shield. The method for secondary bonding includes fixing a base of a clip of a curing shield to a first surface of a first part. The curing shield includes a pad fixed to the clip. The clip has the base and a spine fixed to and extending away from the base and terminating at a distal end. The pad extends along at least a portion of a length of the spine between the base and the distal end. The method also includes applying adhesive along a faying surface of one of the first part and a second part. The second part is assembled to the first part along the faying surface so that the distal end of the clip extends toward the second surface and the curing shield defines a pocket adjacent the faying surface at least partly enclosed by the pad.

A device for cardboard storage and removal for a bridge in a corrugated cardboard production line includes a bridge over which a conveyor system for conveying the single-sided laminated corrugated cardboard web is arranged. The exit end of the conveyor system for conveying the single-sided laminated corrugated cardboard web is provided with a clamping and cutting unit and a movable cardboard storage carriage unit is provided under the conveyor system for conveying the single-sided laminated corrugated cardboard web, under which conveyor system a conveyor belt system is provided in the bridge, and in the bridge an opening is provided, under which a waste cardboard collecting carriage is provided. The movable cardboard storage carriage unit stores the cardboard by means of cardboard storage rolls, which retain the single-sided laminated corrugated cardboard web flat on the bridge. In the event that a splicing defect is detected, the defective piece is cut out by the clamping and cutting unit and ejected by the conveyor belt system to the waste cardboard collecting carriage through the opening. Hence, it follows that productivity is improved.

An assembling device is disclosed. The assembling device is used to assemble a plastic frame and a back plate together and includes: a pressing mechanism configured to press a region of the plastic frame; and a supporting device. The supporting device includes: a supporting platform configured to support the back plate and the plastic frame; and a supporting frame configured to support the pressing mechanism. The pressing mechanism is configured to contact the plastic frame at least one contact point, and a direction of a resultant force of forces applied at the at least one contact point by the pressing mechanism is at an acute angle with respect to a plane where a top surface of the plastic frame lies.

An add-on part (10) for connecting to a component (30). The add-on part (10) has a longitudinal axis (A) and a welding section (11) to be welded to the component (30) by torsional ultrasonic welding. The welding section (11) has a contact surface (12) for contact with a torsion sonotrode (70) and a welding surface (13) for connecting to the component (30). The welding section (11) is delimited, at least in some sections, by an inner vibration-decoupling zone (14). The inner vibration-decoupling zone (14) extends, at least in some sections, at an inclination to or parallel to the longitudinal axis (A). The method comprises a) bringing the welding surface (13) in contact with a welding region (31), b) applying a force to the contact surface (12) such that the welding surface (13) is pressed against the welding region (31), and c) introducing a torsional ultrasonic vibration into the welding section.

The present invention relates to plastic welding process comprising using a dynamic heatsink that minimize the temperature rise of the predetermined surface whereby the surface quality of plastic welding is maintained.