EP0682725A1 - Dispositif de decoupe ultrasonore et/ou de soudage ultrasonore de bandes textiles - Google Patents

Dispositif de decoupe ultrasonore et/ou de soudage ultrasonore de bandes textiles

Info

Publication number
EP0682725A1
EP0682725A1 EP94904625A EP94904625A EP0682725A1 EP 0682725 A1 EP0682725 A1 EP 0682725A1 EP 94904625 A EP94904625 A EP 94904625A EP 94904625 A EP94904625 A EP 94904625A EP 0682725 A1 EP0682725 A1 EP 0682725A1
Authority
EP
European Patent Office
Prior art keywords
web
combination
horn
rail
combinations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP94904625A
Other languages
German (de)
English (en)
Inventor
Stefan Kipp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaupel Textilmaschinen KG
Original Assignee
Vaupel Textilmaschinen KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE4303092A external-priority patent/DE4303092A1/de
Application filed by Vaupel Textilmaschinen KG filed Critical Vaupel Textilmaschinen KG
Publication of EP0682725A1 publication Critical patent/EP0682725A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
    • D06H7/22—Severing by heat or by chemical agents
    • D06H7/221—Severing by heat or by chemical agents by heat
    • D06H7/223—Severing by heat or by chemical agents by heat using ultrasonic vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/06—Severing by using heat
    • B26F3/16—Severing by using heat by radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7439—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for continuously and longitudinally welding and severing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81469—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed next to the other in a single line transverse to the feed direction, e.g. shoulder to shoulder sonotrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/06—Auxiliary apparatus combined with or associated with looms for treating fabric
    • D03J1/08—Auxiliary apparatus combined with or associated with looms for treating fabric for slitting fabric
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H5/00—Seaming textile materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81264—Mechanical properties, e.g. hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2313/00—Use of textile products or fabrics as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/007—Hardness

Definitions

  • the invention is directed to a device of the type specified in the preamble of claim 1, the active part of which consisted of a multiply-structured vibration generator and a vibrator which amplifies these vibrations (DE-39 25 788 AI).
  • the aforementioned known devices for ultrasonic cutting took up a lot of space and had to have a length on their vibration transmitter on the one hand and on their hom emitter on the other hand, which was precisely matched to the AC voltage frequency of the generator operating them. This will be explained in more detail later in connection with FIG. 2.
  • a very sharply limited resonance occurs. This curve requires an exact matching of the axial lengths used in the construction of the vibrator with the length of the sound waves generated by the piezo-clement of the vibrator.
  • inaccuracies in the production caused by the same type of construction result in different positions Resonance curves to each other that separate generators had to be used to operate the devices.
  • the AC voltage of these different generators had to be set in accordance with the respective resonance frequency of the associated device. Because of the size and variety of components, the known devices were relatively expensive. Finally, the efficiency was relatively low.
  • the invention has for its object to develop an inexpensive device of the type mentioned in the preamble of claim 1, which is characterized by a compact design and economical, reliable operation. This is achieved according to the invention by the measures listed in the characterizing part of claim 1, which have the following special significance.
  • the invention shortens the axial length of the device already because it uses only the piezo element and the counter section directed away from the web from the vibration transmitter and clamps it directly with the ho radiator.
  • the result is a new structural unit that combines the counter section and the piezo element with the home radiator and is therefore to be called "combination" in the following.
  • the invention also leaves the dimensioning of the components of the vibration transmitter and home radiator which has been customary in the prior art and uses an axial length for the counter section which is at most equal to 1/8 of the sound wave length and only a total axial length for the combination, which is at most 3/4 of the sound wave length. Because of the much shorter axial length of the device according to the invention, its cross section can also be reduced.
  • the device according to the invention results in a flat resonance curve which no longer requires an exact matching of the lengths with the given sound wave length. This is explained in more detail.
  • FIG. 3 schematically shows two resonance curves, namely for the known device from FIG. 2 on the one hand and for the combination according to the invention from FIG. 4 on the other hand,
  • FIG. 6 shows a cross section through a weaving machine with a design modified compared to FIG. 1,
  • Fig. 7 in approximately natural size a part of the cross-section shown in Fig. 5 and 8 shows a further application of the combinations according to the invention in a punching tool.
  • a web 10 is produced by conventional textile-technical bindings between warp thread 11 and one or more weft thread 12.
  • Any pattern 13 can be woven in, which is of particular interest if labels are to be woven on this weaving machine.
  • the patterns 13 of the labels are produced lying side by side in numerous web zones as wide fabrics in this web 10.
  • This web 10 is then fed to multiple cutting devices 20, where longitudinal cuts 14 are produced at the desired locations, which cut the web 10 into individual strips 15.
  • the cut strips 15 are pulled off in the direction of the movement arrow 77. Then, according to the length of the patterns 13, they are cut into the required sections and form the labels which can be attached to articles of clothing or the like.
  • this is a cutting device that works with ultrasound.
  • This includes a generator 50 which can be seen in FIG. 1 and which, from conventional electrical alternating current, has higher-frequency alternating voltages, e.g. B. generated between 20 and 30 kHz and supplied via electrical lines 31 to an active part 20 of the device according to the invention to be described in more detail.
  • This active part 20 is located, for. B. on one face 16 of the web and it is assigned, on the opposite web back 17, a passive part 30, which will be referred to as "anvil” in the following.
  • the web 10 to be cut is located between the active part 20 and the anvil 30.
  • the electrical alternating voltage is converted into ultrasound of the same frequency and, after amplification of the vibration amplitude, as vibration energy onto the web 10
  • the active part 20 acts like a hammer and, with its end 28 contacting the web, carries out a mechanical hammer frequency of 20 to 30,000 pulses per second.
  • the friction resulting from this hammer movement causes the web material to heat up and can be used to separate or weld the web 10. If the hammer end 28 is pointed, an ultrasonic cut occurs and with a flat hammer end to a weld. The edges merge along the cut, which is why fraying of the tissue at the interfaces 14 is avoided.
  • the web can also be mechanically destroyed at the interface 14. You can therefore also non-meltable material, e.g. B. cotton threads ver ⁇ use in the web 10, which can be severed with the horn end.
  • the known active part 20 ' had the following appearance, which can be seen in more detail in FIG. 2.
  • the electrical vibration signals coming from the aforementioned generator are converted into mechanical vibrations in a vibration generator 24 '.
  • the vibration generator 24 ' is divided into three axial sections 21', 22 ', 23', which are cylindrical and are firmly connected to one another by an axial screw 18 '.
  • the electrical signals arrive at two piezoelectric ceramics 25 'which oscillate in phase opposition to one another during operation and form a first axial section 21' of the vibration generator 24 ', which will hereinafter be referred to as "piezo element" for short.
  • the piezo element 21 ' is connected between the two other axial sections 22', 23 ', which consist of different material from one another.
  • the piezo element 21 generates sound vibrations which should pass to the other axial sections 22', 23 'located on both sides thereof in very different ways.
  • the lowest possible sound energy is to be transferred to the outer axial section 22 ', which is why it is made of steel and is hereinafter referred to as "counter section” for short.
  • the third axial section 23 'of the vibration transmitter 24' located on the opposite side of the piezo element 21 ' is intended to absorb as high a portion of the generated acoustic energy as possible and to transmit it to the subsequent Hom ⁇ radiator 26', to be described in more detail, where it is used .
  • this axial section 23 ' will hereinafter be referred to as "useful section” of the vibration generator 24'.
  • This useful section 23 ' is made of aluminum.
  • the home radiator 26 ' is connected via a threaded pin 19' only to the preceding useful section 23 'and consists of expensive titanium.
  • the hom emitter has the task of increasing the oscillation amplitude of the ultrasound coming from the oscillation generator 24 'and is provided with a taper 27'.
  • the horn end 28 ' contacts the web and has sharpened cutting edges 29 ', when the above-mentioned cuts "are generated to.
  • the Homstrahler 26', 36 ' about twice as long as the length 33' of the useful part 23 'detaded ⁇ according to the length dimension, and therefore, for reasons of space , shown in Fig. 2 only with its two ends.
  • the individual sections of the vibration generator 24 'must have an axial length 32', 33 ', 36' which is precisely matched to the ultrasonic vibration used and which can be seen in FIG. 2, so that there is sufficient sound energy at the horn end 28 '.
  • the ultrasound generated in the active part 20 ' leads to so-called "standing waves” which have a so-called "vibration belly” with a large amplitude and a "vibration node” with an amplitude of zero.
  • the standing waves have a wavelength that depends on the one hand on the ultrasound frequency and on the other hand on the medium in which they are formed.
  • the standing waves are longitudinal waves, but, for better clarification, the associated standing wave 37 'is illustrated in the right half of FIG. 2 in the form of transverse vibrations.
  • a vibration node 35 'of the standing shaft 37' should come about and the outer counter section 22 'should have an axial length 32', which takes into account the speed of sound in its material corresponds to half a sound wave length, that is to say then a vibration belly 34 'is formed at the upper end of the counter section 22'.
  • the total axial length of the vibration sensor 24 'of FIG. 2 is A.
  • the axial length of this component was at least ⁇ 12 or a full-line multiple thereof.
  • the same also applies to the axial length 36 'of the horn emitter 26', which, as the shortened representation of the standing shaft 37 'in FIG. 2 shows, is also the same the scarf must be long or a full line multiple of it.
  • the taper 27 ' must be taken into account. Only then does an effective antinode 34 'arise at the horn end 28'.
  • the vibration node 35 ' lies within the axial distance 36'.
  • the known active part 20 ' accordinging to the prior art has a total length 38' which is at least equal to twice the sound wave length in the various materials concerned, that is to say 2. ⁇ .
  • the individual sections of the known active part 20' have a large diameter 39 '.
  • the active parts 20 'of the known cutting devices have a sharp resonance curve 51', which is shown in FIG. 3.
  • the vibration energy E to be transmitted is plotted there as a function of the effective sound frequency f.
  • the known resonance curve 51 ' is very sharply limited to the effective resonance frequency f. Even a small deviation of the generated sound frequency leads to such a detuning that at the contacting end of the horn 28 'no longer a stable antinode 34' of the standing wave 37 'is created. It was therefore necessary to match the described axial lengths 32 ', 33', 36 'exactly with the effective ultrasound frequency.
  • the tuning is usually done via the AC voltage generator, which must be readjusted accordingly with its electrical output frequency.
  • the ⁇ invention brings a significant improvement over the prior art. This can be seen from the corresponding one shown in FIG Active part 20 according to the invention already clear v.
  • the same reference numerals are used to designate corresponding components as in the active part 20 'of FIG. 2 according to the state of the art, but, to distinguish them, are identified without a dash ('). It is sufficient to go into the differences and special features, while the previous description applies.
  • a special feature of the active part 20 according to the invention is that the hom emitter 26 sits directly on the piezo element 21, which here also consists of two piezoelectric ceramics 25 and is generated by the generator 50 of FIG. 1 via the one in FIG. 4 as well recognizable electrical lines 31 is supplied with the electrical alternating voltage.
  • the piezo element 21 which here also consists of two piezoelectric ceramics 25 and is generated by the generator 50 of FIG. 1 via the one in FIG. 4 as well recognizable electrical lines 31 is supplied with the electrical alternating voltage.
  • only one counter section 22 is provided. These components 26, 21, 22 are directly clamped against one another by an axial screw 48.
  • the shaft of the screw 48 passes through an axial bore in the counter section 22 and in both ceramic disks 25 of the piezo element 21. Because of the electrical connections of the lines 31, the shaft is partially insulated by a hose 47.
  • the axial length 32 of the counter section 22 is shortened because it has to be at most equal to 1/8 of the effective sound wave length ".
  • the counter section 22 consists of stainless steel and has an axial length 32 which only 1/16 corresponds to the effective sound wave length it is surprising that this axial length 32 can vary considerably without significantly impairing the good quality of the cutting or welding.
  • This also applies to the axial length 36 of the horn 20 belonging to the combination 20, which, as practice shows, can easily vary in the range between 7/16 to 10/16 of the effective sound wave length. This will be explained later with reference to FIG. 3.
  • a so-called "hard aluminum”, namely an alloy of aluminum, magnesium and silicon, is used for the home radiator 26.
  • the home radiator 26 in the present case has an axial length 36 of approximately 3/8.
  • the total length 38 of the combination 20 that can be seen in FIG. 4 is approximately ⁇ / 2, ie is only 1/4 of the total length of the known active part 20 ′ shown in FIG. 2.
  • the determined standing wave 37 for the combination 20 there is also shown in FIG.
  • the amplitudes of the mechanical vibrations occurring in the abscissa direction are shown on a logarithmic scale.
  • an antinode 34 of very large amplitude is produced at the end of the horn 28, while an oscillation node 35 is formed approximately in the middle of the piezo element 21.
  • This favorable form of the standing wave results from the following further structure of this combination.
  • the home radiator 26 of the combination 20 according to the invention has a special end section 40 consisting of different materials according to FIGS. 4 and 5.
  • the horn end 28, which is also provided with a cutting edge 29 in this case, is brought about by an end piece 41, which is opposite the Light metal alloy is formed in the upper section 43 of the horn 26 made of steel with a hardness of more than HRC 60.
  • the upper section 43 terminates with a taper 27 and finally continues in the cylindrical end piece 41.
  • the upper section 43 of the end section 40 of the horn radiator 26 is clamped by a threaded pin 49, which is screwed at both ends into blind hole-like threaded bores 59, which can best be seen from FIG. 5.
  • an intermediate piece 42 which is preferably made of pure titanium, is used between the end piece 41.
  • This intermediate piece 42 has the task of reducing the losses when the vibrational energy is transferred.
  • the trained as a titanium ring Intermediate piece 42 is axially penetrated by the threaded pin 49 and steams the vibrations in the area of the threaded pin 49.
  • the threaded pin 49 has a radial shoulder 45 with a conical front end 44.
  • the end face 54 of the threaded bore 59 in the end piece 41 on the one hand and in the upper section 43 of the horn radiator 26 on the other hand have a corresponding, complementary counter-conicity. Through this surface contact, axial forces are also well transmitted in the area of the threaded pin 49.
  • the combination 20 according to the invention has a favorable resonance curve 51 which differs completely from the prior art described above and which has a broad, largely flattened maximum in the range of the resonance frequency f0.
  • the resonance curve 51 can be in a considerable frequency range -A. f, the limit frequencies f lying between two resonance frequencies f on both sides. and ⁇ -, has practically the same energy at the end of the horn 28.
  • This has the great advantage that now, as can be seen in FIG. 1, all combinations 20 of the same type provided in the weaving machine can be connected to the same AC voltage generator 50 without any problems. This brings a considerable simplification and the following advantages.
  • the combinations 20 can be attached to a common rail 52, according to FIG. 1, which runs transversely to the transport direction 77 of the wide-web during weaving.
  • the distances between the combinations 20 can be changed in order to individually adjust the width 55 of the individual strips 15 of FIG. 1 produced by the ultrasonic cuts 14.
  • the anvil 30 on the opposite side of the web is al len combinations 20 in common and consists of a continuous rod, which also extends transversely to the transport direction 77 of the web 10.
  • the anvil 30 is designed as a hollow tube 53 and its interior is filled with a deformable material 102 of high specific weight, namely in the present case with lead. This can also be clearly seen from FIG. 7, from which the following further important details of the invention can be found.
  • the combination 20 is fastened to the rail 52 via a specially designed housing 60, which can be made of polypropylene. It is an elastic material which produces two projecting, deformable hooks 61.
  • the rail 52 has associated continuous strips 56 which are encompassed by the hooks 61 in a mirror image of one another. The hooks 61 engaging the strips 56 are under a spring tension of the material and already hold the housing 60 by friction on the rail 52.
  • the housing 60 has a removable cover, which is removed in Fig. 7, but there, for. B. by screws. Like., Can be attached to the designated 62 locations.
  • the housing 60 comprises a central chamber 63 in which the combination 20 described above is held.
  • the combination 20 is pressed by a spring 65 against a defined seat surface 64 inside the chamber 63.
  • the combination with the mentioned end section 40 protrudes from the housing.
  • the spring 65 is supported on a plastic ring 67 made of polytetrafluoroethylene and an elastomer ring 66 made of silicone on the upper front end of the above-described counter section of the combination 20.
  • the opposite end of the spring 65 is directly against an inner surface of the housing 60.
  • a hose 70 which can bring cooling air in, is arranged in an outer chamber 68 of the housing 60 and, as shown in FIG. 7, opens into the lower region of the middle chamber 63 described above.
  • the cooling air passes around the combination 20 and conducts the heat an opening 69 in the housing 60 from the outside.
  • the hose 70 ends, likewise in the upper region of the housing 60, in a hose coupling, not shown in more detail, to which a hose connector 71, shown in FIG. 7 in the released state, can be connected, to which the cooling air is connected leading hose feed 72 sits.
  • the outer chamber 68 there is also the already mentioned electric line 31 for the described piezo element of the combination 20 and is led through an opening in a partition 73 which is in the housing 60 between the two chambers 63, 68.
  • This electrical line 31 ends in an electrical connection socket 74 likewise provided in the upper region of the housing 60, into which a corresponding connection plug 75, shown in FIG. 7 in the released state, can then be coupled as required.
  • the connector plug 75 is located on a continuing electrical line section 76, which is described in more detail in FIG. 6.
  • Fig. 7 shows how the horn end 28 of the end section 40 presses the web 10 against the opposite anvil 30 and, during the withdrawal movement
  • the described ultrasound cut 14 is generated with its horn end 28.
  • a further special feature of the invention is that the combination 20 according to the invention can be operated continuously, that is to say without resting phases. In order to be able to maintain the resonance, pulse operation has been necessary in the prior art. The cooling described above facilitates this continuous operation of the piezo elements in the invention.
  • a parallel toothed rack 57 is attached to the side of the rail 52, which can also be seen in FIG. 1.
  • the rack 57 protrudes through a lateral cutout in a bore
  • the housing 60 also has a locking member 82, which blocks the selected position of the housing 60 on the rail 52.
  • this locking thread 52 consists of a toothed wheel, which is normally always held in tooth engagement with the toothed rack 57 by an elastic member 83, namely here a helical spring. Then an adjustment of the housing 60 is blocked.
  • the elastic member 83 can be arranged in an axial extension of the bore 78 described above.
  • the shaft of this actuating tool 80 is first moved in the direction of the axial arrow 79 through the opening into the interior of the bore 78, so that the pinion toothing 81 comes into engagement with the rack 57. If the actuating tool 80 is then moved in the sense of the rotary arrow 84 also indicated in FIG. 7, the pinion 81 rolls on the rack 57 and moves the housing 60 along the rail 52 in a corresponding manner.
  • the shaft of the actuating tool 80 is named stored in the housing bore 78 in a rotating manner.
  • the locking ghed 82 With the axial insertion movement 79 of the actuating tool 80, the locking ghed 82 is simultaneously set ineffective.
  • the toothed wheel 82 is pressed back against the action of the elastic member 83 acting on it and releases the rack 57.
  • FIG. 6 shows an embodiment modified compared to FIG. 1.
  • a double rail 58 running over the pulp web 10 which has two rail parts 52, 52 'of the type described. These have two groups of housings 60 clamped to them on the two rail outer sides 88, 88 ′ facing away from one another.
  • the housings 60 located on the other rail part 52 ' can be arranged in the area of the gaps in the group of housings 60 located on the rail part 52 of this double rail 58.
  • the two rail parts 52, 52 'of the double rail 58 are arranged at a defined angle both to one another and to a guide 90 of the fabric web. This guide 90 supports the corresponding two anvils 30 designed as filled tubes 53, 53 '.
  • the wide fabric arises from the warp thread 11 and weft thread 12 at the weaving point designated in FIG. 6.
  • the wide fabric is then passed around a heating element 87 which is in with a spreader.
  • the web 10 runs over a threaded rod 89 and then over the described first tube 53 ', on which the one group of the combinations 20 located in the housings 60 is printed and the first group of separating cuts in the web 10 generated.
  • This threaded rod 89 serves to hold the web 10 in the desired width during the pull-off movement 77.
  • Those zones of the web which have not yet been slowly cut there are then guided over the second tube 53 and divided up by the combinations 20 fastened to the rear rail part 52.
  • the finished cut strips 15 are then, as shown in FIG. 6, passed over a further threaded rod 91, where they are deflected and led to take-off rolls of the weaving machine, not shown in detail.
  • the profile cover 93 can carry electrical coupling elements 94, to which, via complementary electrical connecting parts 95, the electrical line sections 76 for the individual housings 60 already described in FIG. 7 can be electrically contacted.
  • the electrical lines 31 already mentioned in FIG. 1 extend from the coupling elements 94 and are led, in the interior of the rail space 92, to the common AC voltage generator 50 described.
  • the electrical components 96 used to operate the combination 20 can also be arranged in this space 92, specifically, as shown in FIG. 6, attached to a leg of the profile cover 93 facing inwards via a printed circuit board 97.
  • the hose feed lines 72 described in FIG. 7 can also be connected to the profile rail 93 via associated hose connectors, not shown in detail.
  • the supply hoses 99 for cooling air which can be seen in FIG. 6 are also arranged.
  • the supply hoses 99 lead to a source, not shown in more detail, which supplies the cooling air at the end of the rail 58.
  • this tool part 100 is a punching tool which, with its working profile 101, determines the shape with which the material to be cut is to be cut out from a path not shown in more detail by means of ultrasound.
  • the working profile 101 is a hexagon.
  • This stamping tool part 100 replaces, with reference to FIG. 4, the described end pieces 41 of the individual combinations 20.
  • This application is possible because of the broad resonance curve 51 of the combination 20 according to the invention, which was already explained in connection with FIG. 3. As can be seen in FIG. 8, all the electrical lines 31 to the individual piezo elements of the combinations 20 can therefore be connected again to a common AC voltage generator 50.
  • a tool part 100 could of course also perform a weld between two or more tracks lying one above the other.
  • the tool part 100 could also have other shapes and perform other functions.
  • B. serve as an atomizer for liquids or the like.
  • the atomizer was designed in the form of a plate, to which several combinations 20 according to the invention are connected and, in the event of an operation, together excite the plate to produce ultrasonic vibrations. A liquid that gets onto this plate is then atomized by these vibrations. A larger number of combinations 20 generates a correspondingly high vibration energy on the plate or tool 100, which is then used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

La partie active (20) d'un dispositif permettant de découper ou de souder des bandes textiles comprend un générateur de vibrations structuré en plusieurs sections qui comporte un élément piézo-électrique (21) et un radiateur en cornet qui amplifie l'énergie acoustique produite dans le générateur de vibrations et qui la transfère sur la bande par l'intermédiaire de l'extrémité (28) de son cornet. Afin d'obtenir un appareil plus efficace de moindre encombrement, l'invention suggère de monter le radiateur en cornet (26) directement sur l'élément piézo-électrique, sur le côté opposé duquel il n'y a qu'une contre-section (22) du générateur de vibrations. Ces trois composants sont fixés solidement les uns aux autres et forment une nouvelle combinaison (20). La longueur (32) axiale de la contre-section (22) est inférieure ou égale à 1/8 de la longueur d'ondes sonores effective, alors que la longueur totale (38) axiale de la combinaison (20) est inférieure ou égale aux 3/4 de la longueur d'ondes sonores.
EP94904625A 1993-02-04 1994-01-05 Dispositif de decoupe ultrasonore et/ou de soudage ultrasonore de bandes textiles Withdrawn EP0682725A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4303092A DE4303092A1 (de) 1993-02-04 1993-02-04 Verfahren und Vorrichtung zur Herstellung eines durch Figurschüsse gemusterten textilen Bandes, insbesondere eines Etikettbandes, aus einer Breitbahn mit schmelzfähigem Fadenwerkstoff
DE4303092 1993-02-04
PCT/EP1994/000011 WO1994018373A1 (fr) 1993-02-04 1994-01-05 Dispositif de decoupe ultrasonore et/ou de soudage ultrasonore de bandes textiles

Publications (1)

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EP0682725A1 true EP0682725A1 (fr) 1995-11-22

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EP94904625A Withdrawn EP0682725A1 (fr) 1993-02-04 1994-01-05 Dispositif de decoupe ultrasonore et/ou de soudage ultrasonore de bandes textiles

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EP (1) EP0682725A1 (fr)
JP (1) JPH08506060A (fr)
KR (1) KR960701254A (fr)
CN (1) CN1094344A (fr)
AU (1) AU5859494A (fr)
BR (1) BR9405822A (fr)
CA (1) CA2153150A1 (fr)
WO (1) WO1994018373A1 (fr)

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DE29511224U1 (de) * 1995-07-11 1995-10-26 Textilma Ag, Hergiswil Ultraschallvorrichtung zum Schneiden einer schmelzfähigen Textilbahn und gleichzeitigen Verschweißen der Schnittränder
GB9610417D0 (en) * 1996-05-17 1996-07-24 Rawson Francis F H Horn tuning and adjustment
DE59810798D1 (de) 1997-03-21 2004-03-25 Woodwelding Ag Zuerich Verfahren zur verankerung von verbindungselementen in einem material mit poren oder hohlräumen sowie verbindungselemente für die verankerung
ITRN990032A1 (it) * 1999-11-25 2000-02-25 I L T E S Srl Apparecchiatura automatica per tagliare tessuti.
DE10210075B4 (de) * 2002-03-08 2008-04-30 Stapla Ultraschall-Technik Gmbh Vorrichtung zum Abdichten und Trennen eines Rohrabschnitts
KR100829990B1 (ko) * 2006-10-31 2008-05-19 박상부 초음파를 이용한 직물 절단 장치 및 직물 절단 방법
US9326840B2 (en) * 2008-12-15 2016-05-03 Allergan, Inc. Prosthetic device and method of manufacturing the same
US9308070B2 (en) 2008-12-15 2016-04-12 Allergan, Inc. Pliable silk medical device
DE102011118208A1 (de) * 2011-11-11 2013-05-16 Artech Ultrasonic Systems Ag Ultraschall-Schneidevorrichtung
KR101515806B1 (ko) * 2013-11-04 2015-05-04 코닝정밀소재 주식회사 시트 제조방법 및 제조장치
CN103990903B (zh) * 2014-06-13 2016-08-24 金兴汽车内饰股份有限公司 超声波焊接设备用焊头压紧装置
JP6945223B2 (ja) * 2017-06-29 2021-10-06 株式会社アルテクス 接合用共振器又は接合用受け治具
DE102019203383A1 (de) 2019-03-13 2020-09-17 Zf Friedrichshafen Ag Verfahren und System zum Erzeugen eines Faservorformlings

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SU817809A1 (ru) * 1978-06-26 1981-03-30 Специальное Проектно-Конструкторскоеи Технологическое Бюро Малых Элект-Рических Машин Производственногообъединения "Эльфа" Стержнева ультразвукова колеба-ТЕльНА СиСТЕМА
JPS63283802A (ja) * 1987-05-13 1988-11-21 Taga Electric Co Ltd 超音波振動切削装置
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See also references of WO9418373A1 *

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KR960701254A (ko) 1996-02-24
WO1994018373A1 (fr) 1994-08-18
AU5859494A (en) 1994-08-29
CN1094344A (zh) 1994-11-02
JPH08506060A (ja) 1996-07-02
BR9405822A (pt) 1995-12-05
CA2153150A1 (fr) 1994-08-18

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