摘要:
An acoustical energy transfer component for transporting acoustical energy, the component having a shaped metal component body having a substantially uniformly isotropic expansion and contraction amplitude upon acoustical excitation. A method of manufacturing an acoustical energy transfer component having a component body with a uniformly isotropic expansion and contraction amplitude upon acoustical excitation.
摘要:
A method and an apparatus for ultrasonic processing of workpieces (6) with a vibratory structure (1) comprising a sonotrode (3) and a converter (2). Energy is fed to the converter (2) by means of an ultrasonic generator (7), which is switched on and off by electrical switch-on and switch-off signals respectively, only for the duration of processing cycles. According to the invention the switch-off signals are generated on the basis of at least one state parameter (P) of the generator (7).
摘要:
In order to weld a reinforcing tape piece formed of a synthetic resin to a separable bottom stop attachment portion of a slide fastener chain by ultrasonic heating over a core portion and a main tape portion in a fastener tape, a welding time and/or an amplitude which are/is suitable for welding the reinforcing tape piece to the core portion and the vicinity of the core portion, and a welding time and/or an amplitude which are/is suitable for welding the reinforcing tape piece to the main tape portion are preset respectively. The welding of the reinforcing tape piece to the core portion and the vicinity of the core portion and the welding of the reinforcing tape piece to the main tape portion are carried out in two stages in accordance with the welding time or the amplitude which is set.
摘要:
A process and apparatus related to a workstation adjacent to a traveling web including a device for intermittently performing an operation affecting the web. An important application involves ultrasonically welding multiple layers of a traveling web. First and second rollers on opposite sides of the workstation are simultaneously shifted in a direction counter to the machine direction each time a bonding force is applied. The overall running speed in the machine remains at a constant velocity due to the resultant festooning effect and thus the dwell time for bonding is increased. Thus the effective operating speed of processed having finite limits may be increased at least 33%. The first and second rollers are eccentrically rotationally mounted, respectively, on third and fourth hollow rollers which are provided with eccentrically positioned hollow cylindrical openings which, in turn, are mounted, respectively, on shafts positioned perpendicularly to the machine direction. Shifting of the rollers is effected by simultaneous rotation of the rollers. Preferably, the first and second rollers are driven synchronously in a first rotational direction and the third and fourth rollers are driven synchronously in the opposite rotational direction.
摘要:
The invention relates to an ultrasonic welding apparatus (100) for welding together at least two superposed sheets (1, 2) made of plastics material and traveling continuously along a predetermined path (F), the apparatus (100) being of the type comprising a sonotrode (101) and an anvil (102) disposed facing each other so that their facing surfaces (101′, 102′) define a through gap (102) through which two superposed sheets (1, 2) to be welded together pass, the gap having an inlet section (104) and an outlet section (105), the sonotrode (101) vibrating at high frequencies to emit ultrasound waves. According to the invention, the anvil is fixed and said facing surfaces of the sonotrode and of the anvil are generally plane and converge towards each other such that the section of said through gap decreases continuously between its inlet section and its outlet section.
摘要:
This invention pertains to apparatus and methods for intermittently creating ultrasonic bonds in sequentially advancing work piece segments, in a nip. The work piece segments are up to about 0.25 inch thick. The apparatus comprises a frame, anvil support apparatus supporting an anvil, and horn support apparatus supporting an ultrasonic horn. The ultrasonic horn and anvil are collectively mounted and configured such that the ultrasonic horn and anvil can be brought together to define the nip. The frame, anvil support apparatus, and horn support apparatus collectively are sufficiently rigid that the horn and anvil can be brought together with interference levels of about 0.000 to about 0.008 inch at a raised bonding portion in combination with defining sufficient nip pressure to develop ultrasonic bonds in work piece segments passing through the nip. The method comprehends bringing a back-up roll, mounted above the ultrasonic horn, into engagement with the ultrasonic horn, to directly support the horn. First and second support rolls can be used to releasably support opposing sides of the outer surface of the ultrasonic horn, preferably below the axis of the horn, whereby the support rolls can be used to lift the horn into engagement with the back-up roll.
摘要:
An apparatus and method for effecting an operation on at least one moving substrate web is disclosed. The apparatus comprises a rotatable bonding roll that is located adjacent the substrate web and configured to rotate about a bonding axis. A rotatable anvil roll has an anvil surface and is configured to rotate about an anvil axis to press the substrate web against an outer peripheral bonding surface of the bonding roll thereby bonding the substrate web. At least three support wheels are configured to contact the bonding surface of the bonding roll and to hold the bonding roll in a substantially fixed position.
摘要:
A vibration welding apparatus for welding synthetic resin parts together by vibrating one of the resin parts while the resin parts are in contact with each other. An upper jig for supporting one of the synthetic resin parts, a lower jig for supporting the other of the snythetic resin parts and a vibrating member to which the upper jig is attached are provided in the apparatus. The jigs are held together by bolts which can withstand the vibrating motions. Head portions of the bolts are inserted into insertion holes of the upper jig, notches of spacers are engaged with the shaft portions of the bolts between an attached portion of the upper jig and the head portions of the bolts, and the bolts are fastened to the vibrating member in the state where the notches are engaged with the shaft portions, so that the attached portion is fastened through the spacers by the head portions of the bolts and the vibrating member to thereby attach the upper jig to the vibrating member.
摘要:
A method and an apparatus for producing zippered bags at faster speeds. This is accomplished by speeding up the ultrasonic welding operation. More specifically, ultrasonic welding is performed continuously while the web of bag making film and the zipper tape are moving, instead of being performed while the film and zipper tape are stopped. To facilitate this improvement, the ultrasonic welding station is moved from the bag machine, where the bag making film and zipper tape move intermittently, to the sealer frame, where the film and zipper tape move continuously. The ultrasonic welding apparatus comprises a pair of rotary elements, one of which is acoustically coupled to an ultrasonic transducer. One of the rotary elements is provided with a protuberance on its periphery that acoustically couples the zipper tape to the energized rotary element.
摘要:
A method for ultrasonically bonding thermoplastic materials, for example melt-compatible thermoplastic materials, wherein the thermoplastic materials are preheated prior to entering an ultrasonic bonding means, thereby substantially increasing an ultimate bond strength established between the materials during the ultrasonic bonding process.