A method of welding at least two plastic components together is disclosed. The two plastic components are welded together at respective joining surfaces. The method comprises directing at least one infrared (IR) laser beam along the joining surfaces of the at least two plastic components. The IR laser beam heats the joining surfaces of the at least two plastic components to a welding temperature. The method also includes clamping the at least two plastic components together at the joining surfaces to create a weld.

A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a first sealing zone, and an adjacent weakening zone. The weakening zone may be a heated perforator, includes a heating wire, or be disposed to create an auxiliary sealed area. The heating wire can have connected thereto, a source of power that is an adjustable voltage or magnitude, and/or pulsed, and/or a feedback loop. The heating wire ay be an NiCr wire and make intermittent contact with the web and be disposed in an insert. The weakening zone may create a line of weakness that is uniform or varies in intensity, is a separating zone, or includes a heat film, a toothed blade, a row of pins, a source of air, or a source of vacuum. The sealing zones ma include temperature zones, cartridge heaters, cooling air, or hated air, or a source of ultrasonic, microwave or radiative energy.

Provided is a laser welded body which can be integrated through a laser-welding step without undergoing complicated steps even through use of the same or difference resin members each other, which has excellent welding strength between the resin members, which maintains the characteristics of a resin contained in the resin member and which exhibits the high welding strength by improving meltability of the resin members yet under a laser-welding condition of a medium and high scan speed. A laser welded body comprises a resin member(s) which contains a thermoplastic resin and nigrosine sulfate having a sulfate ion concentration of 0.3 to 5.0% by mass and has an absorbance a of 0.09 to 0.9, an adjoined part where the resin member(s) is overlapped and/or butted, and at least a part of the adjoined part is laser-welded.

A molded article that is used on a laser beam absorbing in laser welding side and that is possible to be marked by being irradiated with a laser beam, the molded article being composed of a resin composition containing 0.1 to 0.4 parts by mass of a carbon black per 100 parts by mass of a thermoplastic aromatic resin, the carbon black having a primary particle diameter of 20 to 40 nm and a DBP oil absorption of 100 cm.sup.3/100 g or more.

A method for controlling the operating parameters of a sealing unit of the follower type in a product packing machine, wherein the sealing unit comprises a sealing module movable with reciprocating motion along a feed path of a tubular film to be sealed. The method is implemented in accordance with a plurality of operating parameters and comprises the step of setting the value of at least one input operating parameter selectable at least between sealing time and production speed. The method also comprises the step of calculating the values of the remaining, unselected operating parameters as a function of the set value, where one or more of the remaining operating parameters are subject to restrictions connected with the machine architecture. The method also comprises the step of checking that the values calculated are compatible with respective reference ranges and/or with the restrictions.

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.

In some examples, manufacturing techniques for implantable medical devices are described. An example method may including positioning a metal housing component adjacent to a polymer housing component so that there is an interface between the metal housing component and the polymer housing component; and forming a seal at the interface between the metal housing component and the polymer housing component to join the metal housing component and the polymer housing component, wherein the joined metal housing component and the polymer housing component form at least a portion of housing for the implantable medical device, wherein the housing of the implantable medical device contains electronic circuitry.

The current disclosure provides for methods of manufacturing a balance ring assembly. Such a method includes the steps of securing an upper ring component to a drive head; securing a lower ring component to the weld joint of a base platform; moving the drive head linearly from a home position to a pre-determined touch position; upon reaching the pre-determined touch position, applying a first pressure to the upper ring component and lower ring component; rotating the drive head to move the upper ring component along a first rotational path relative to the lower ring component; and moving the drive head linearly a first distance to move the upper ring component toward the lower ring component and moving the drive head rotationally to move the upper ring component along a second rotational path relative to the lower ring component.

A cover layer is joined to an object by a pressing force and mechanical vibration. The cover layer has a cover layer contact surface, and the object has an object contact surface, and the cover layer contact surface and the object contact surface face each other. At least one of the cover layer and the object include a joining material. The cover layer contact surface is brought into contact with the object contact surface, and a sonotrode presses the cover layer against the object and applies mechanical vibration to an outer surface of the cover layer for a time sufficient for activating the joining material. Cover layer and object are conveyed relative to the sonotrode in a continuous manner in a conveying direction throughout the steps of arranging, of bringing into contact, of pressing and of applying vibration.

A ultrasonic welding method of joining dissimilar-material workpieces, such as sheet materials, and the joined components formed thereby. The method includes applying ultrasonic energy to a thermoplastic piece to fill a hole of a dissimilar piece to form a weld point that is made up with polymer from the thermoplastic piece. In general, the geometry of the thermoplastic piece is not altered during the process. The dissimilar piece generally has a higher melting temperate and can be metal, thermoset polymers, or other thermoplastic material. The welded pieces can be arranged in a lap, laminate, or double lap configuration. In some embodiments, the hole of the dissimilar sheet material includes undercut features that improve the mechanical interlock between the dissimilar pieces. In some embodiments, the weld point has a mushroom cap to improve mechanical interlock.