An ultrasonic welding system includes an ultrasonic welding stack that is movable to initiated a welding operation. A plurality of sensors measure respective control variables and output control signals corresponding, respectively, to the control variables. A motion control system is coupled to and causes controlled movement of the welding stack, including initiating the welding operation. The motion control system determines, based on the control signals, control inputs such that any motion of the welding stack, subsequent to the initiating, is initially delayed until the control signals satisfy a predetermined condition. In response to the predetermined condition being satisfied, the motion control system causes the welding stack to move in accordance with a weld profile.

The present invention concerns an apparatus for ultrasonic processing of a material web having an ultrasonic vibration unit which has a sonotrode and a converter connected thereto optionally by way of an amplitude transformer, and a counterpart tool, wherein for processing of the material web the web is moved through a gap between the sonotrode and the counterpart tool, wherein the ultrasonic vibration unit is fixed to a carriage moveable relative to the counterpart tool so that the ultrasonic vibration unit can be moved together with the carriage in the force direction, that is to say in the direction of or away from the counterpart tool, wherein there is provided a force sensor for measuring the force applied to the sonotrode by the material web. To provide a corresponding apparatus of the kind set forth in the opening part of this specification, which permits more accurate measurement of the welding force, in order to be able to continuously process by means of ultrasound even situations of use with an extremely small process bandwidth, it is proposed according to the invention that the sonotrode and the carriage are connected together by way of a sensor component which has the force sensor.

A method and apparatus in the manufacture of a spirally wound and welded tube is disclosed. A thermoplastic profile is slid along a path on a slider arranged in an axial direction of the tube and defining a cylindrically shaped winding surface with a diameter corresponding to the inner diameter of the tube to be manufactured. The profile is directed along a spiral path towards a previous turn of said profile by means of radial rollers spaced along said spiral path by adjusting the position of the rollers: Opposite edges of said profile turns are welded together by providing an extruded welding mass between said profile turns. The welded tube is fed from the welding station by means the rollers by sliding it onto a rotating support.

The invention relates to a hand-guided device (10) for setting a setting element (12) in a component. The device comprises a handle (14) for holding the device, a carriage (34), which can be moved in relation to the handle and which bears a rotatably supported drive shaft (46), at one end of which a holder for the setting element is formed, a force accumulator (44), which is arranged between the handle and the carriage and which serves to store a defined advancing force, with which the force limiter can be loaded by means of a relative motion between the handle and the carriage, and a force limiter (64) for limiting the advancing force stored in the force accumulator. The force accumulator is designed to apply the stored advancing force to the setting element by means of the carriage. The invention further relates to a method for manually setting a setting element by means of said device.

Apparatus for forming transversal welds on a composite web material, comprising at least two superimposed sheets of material, suitable for use in the production of sanitary articles, comprising: a feeding unit including first and second feeding means configured to advance the composite web along a main straight direction X at a speed V.sub.1. an ultrasonic welding unit 80 arranged between the first and second feeding means, comprising at least one ultrasound source coupled to a sonotrode having a flat welding surface and an anvil unit having at least one anvil element movable along a closed path, which has a straight portion parallel to the main direction X.

The present disclosure is directed to processes for producing ultrasonic sealable film structures and flexible containers with ultrasonic seals. The film structure includes a first multilayer film and a second multilayer film. Each multilayer film includes a backing layer and a seal layer. Each seal layer includes an ultrasonic sealable olefin-based polymer (USOP) having the following properties: (a) a heat of melting, Hm, less than 130 J/g, (b) a peak melting temperature, Tm, less than 125 C., (c) a storage modulus in shear (G) from 50 MPa to 500 MPa, and (d) a loss modulus in shear (G) greater than 10 MPa.

The multilayer films are arranged such that the seal layer of the first multilayer film is in contact with the seal layer of the second multilayer film. The seal layers form an ultrasonic seal having a seal strength from 30 N/15 mm to 80 N/15 mm when ultrasonically sealed at 4 N/mm seal force.

A system for in-line controlling of the ultrasonic welding of plastic components of an electronic cigarette, in which plastic components are welded to one another at a welding zone to define a welded group; the plastic components are such that the welded group has an air passage duct having a first open end and a second open end. The system includes: a chamber for receiving the welded group; a closure for closing the first open end; air supply for supplying air into the chamber. The system further includes an air exit, connecting the welding zone with the outside of the chamber; a continuous pressure control and adjustment for continuously controlling and regulating the air pressure that enters the air passage duct to keep a fixed air pressure; an air passage nozzle having a predetermined cross section, position between the continuous pressure control and adjustment and the second open end; and a pressure sensor for detecting the air back pressure generated in the chamber after the introduction of air into the air passage duct.

The present disclosure is directed to processes for producing ultrasonic sealable film structures and flexible containers with ultrasonic seals. The film structure includes a first multilayer film and a second multilayer film. Each multilayer film includes a backing layer and a seal layer. Each seal layer includes an ultrasonic sealable olefin-based polymer (USOP) having the following properties: (a) a heat of melting, Hm, less than 130 J/g, (b) a peak melting temperature, Tm, less than 125 C., (c) a storage modulus in shear (G) from 50 MPa to 500 MPa, and (d) a loss modulus in shear (G) greater than 10 MPa. The multilayer films are arranged such that the seal layer of the first multilayer film is in contact with the seal layer of the second multilayer film. The seal layers form an ultrasonic seal having a seal strength from 30 N/15 mm to 80 N/15 mm when ultrasonically sealed at 4 N/mm seal force.

Systems and methods to improve weld quality are described. For example, certain systems and methods described use weld quality monitoring as feedback to an ultrasonic welding process to improve weld quality. Still other systems and methods provide improvement to double sided and single sided ultrasonic welding through the use of selected multiple pulses.

Systems and methods to improve weld quality are described. For example, certain systems and methods described use weld quality monitoring as feedback to an ultrasonic welding process to improve weld quality. Still other systems and methods provide improvement to double sided and single sided ultrasonic welding through the use of selected multiple pulses.