GB2299538A - Asperities on an ultrasonic welding apparatus anvil - Google Patents

Asperities on an ultrasonic welding apparatus anvil Download PDF

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Publication number
GB2299538A
GB2299538A GB9506963A GB9506963A GB2299538A GB 2299538 A GB2299538 A GB 2299538A GB 9506963 A GB9506963 A GB 9506963A GB 9506963 A GB9506963 A GB 9506963A GB 2299538 A GB2299538 A GB 2299538A
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United Kingdom
Prior art keywords
anvil
head
asperities
ultrasonic
fabric
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Application number
GB9506963A
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GB9506963D0 (en
GB2299538B (en
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Michael John Radley Young
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Individual
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Priority to GB9506963A priority Critical patent/GB2299538B/en
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Publication of GB2299538B publication Critical patent/GB2299538B/en
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Classifications

    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • 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
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • 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
    • 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
    • B29C66/8124—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 structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81241—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 structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps being porous or sintered
    • 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
    • B29C66/81265—Surface properties, e.g. surface roughness or rugosity
    • 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
    • B29C66/8141—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8223—Worm or spindle mechanisms
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • B29C66/712—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 composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

An apparatus for welding two or more layers of fabric materials comprises an ultrasonic horn with a welding head 4 and an anvil 12 having a plurality of asperities 16 and being adapted to move the fabric materials to bring another portion into a working zone between the anvil and the head. The asperities may be formed by coating spherical particles onto a ceramic base and sintering to form an integral structure. Alternatively the anvil may be metal and the asperities produced by metal spraying or sputtering. The arrangement may be used to attach polyester elasticated lace material 17 to the top of nylon stockings 15. The anvil may be either cylindrical and rotated or planar. In the latter case, the stockings may either be repositioned on the anvil after one pass or else the anvil rotated through 180{.

Description

METHOD AND APPARATUS F()lx ULTRASONIC WELDING OF MATERIALS The present invention relates to a metllotl and apparatus fve ultrasonic welding of materials, particularly fabric materials. More particularly, but ot exclusively, it relates to a method and apparatus for ultrasonic welding together of two fabric materials, at least one of which is elastically deformable.
The present invention is applicable to iiiany fabric materials. but will be described by way of its use in connecting elasticated lace garters to nylon stockings.
Stockings or socks with elasticated garters are well known items uf clotllillg and arc usually manufactured by sewing a strip of elasticated garter material around the top of the stocking or sock. One difficulty in this process in the neeil to stretch the fabric material usually nylon, of the stocking or sock to an appropriate degree, and to tension the elasticated garter material also to a appropriate degree, whereby the c@@joined article does not exhibit differential ruckling when in use.A further difficulty @@@es from the use of an elasticated lace material as a garter, in garments such as are most usually favoured by female users.
Lace, by its nature, comprises a plurality of holes aiic' l,herefore it is difficult to sew using a regular stitching pattern.
It is an object of the present invention to provide a n-letllofi and apparatus which enables such materials to be joined with more tacilily, aiid one wlsicll @bviates the disadvantages out ctl above.
According to a first aspect of the present invention il-.ere is provided an apparatus for ultrasonic welding together of two or more layers of fabric materials comprising a ultrasonic assembly of piezo electric transducer irteans to generate a longitudinal vibration, a horn operatively connected thereto, and a welling head opera ively connected thereto, the assembly having such a configuration and length tat a standing wave of one half wavelength or an operative multiple thereof is creatable between the head and the transducer means, an anvil means having a plurality of asperities and being adapted to receive the fabric materials, means to move the ultrasonic assembly in a longitudinal direction to bring the head into contact with a portion of the fabric materials, and means to move the anvil means in a transverse direction whereby said portion of the fabric materials received therein is moved past the head to bring another portion into a working zone between the anvil means and the head of the ultrasonic assembly.
Preferably the ultrasonic vibration is ill the region of 20-40 kHz. optionally in the region of 30 kHz.
The ultrasonic assembly may be so resiliently mounted as to enable the head to maintain contact with the fabric layers over a range of variations of thickness thereof.
The anvil means may be of ceramic material.
In this case, the surface of the anvil nay be rougheiied to produce the asperities, or may be formed by coating spherical particles onto a ceramic basc 3nd sintering to form an integral structure.
Alternatively, the anvil means may be metal, in which @@@e tlle asperities may be produced by metal spraying or by metal sputtering.
The anvil may be planar, having one or both major su-.-faces provided with asperities.
In this case, the anvil may be moveable translationaly so that the working zone moves effectively across the surface of the anvil.
Alternatively, the anvil may be cylindrical with its outer circumferential surface provided with asperities. In this case, the anvil may be moveable rotationally so that the working zone moves effectively around the surface ot the anvil.
According to a second aspect of the present invention there is provided a Inetllod of ultrasonically welding together two or more layers of fabric materials, comprising providing an anvil means having a plurality of asiltWrities, removal) attaching at least one fabric layer thereto under a predetermined degree ol tension, placing ;;-l othcr layer ol fabric material over said at least one fabric layer at a working zone of said an@@, providing an ultrasonic assembly comprising piezo electric transducer means, horn and welding head, moving said assembly in a longitudinal direction so that the head thereof contacts an outermost layer of fabric material at said working zone, actuating said piezo eiectric transducer means to produce ultrasonic vibrations at said head, and moving said anvil means in a transverse direction so that said working zone remains adjaceni he head of sa;d assembly but is moved as the surface of the anvil means moves.
Preferably said ultrasonic vibrations are in the region of 20-40 kl-lz, optionally in tile region of 30 kHz.
The anvil means may be planar and be moved translatioll :ly in a direction transverse to the longitudinal direction of the ultrasonic.' assembly.
Alternatively, the anvil means may be cylindrical aid be so moved rotationally that the working zone moves transversely to the longitudinal direction of the ultrasonic assembly and around the circumference of the cylindrical anvil mezils.
At least one fabric layer may be retailed detachably on L".e anvil means by virtue of so being stretched to a predetermined degree as lo be retained thereon, according to the configuration or dimension of the anvil means.
An embodiment of the invention will now be more particularly described by way of example and with reference to the accompanying drawings, wherein: FIGURE 1 is a side elevation, partially in cross scion, of the apparatus embodying the invention; FIGURE 2 is a cross sectional view of a working zone of the anvil of the apparatus to an enlarged scale; FIGURE 3 shows one means ol moving the anvil in a direction transverse to the longitudinal direction of the ultr;tsonic transducer, FIGURE 4 is a perspective view of one embodli;ient of anti) showing in more detail the position of the fabric layers lloereon;; and FIGURE 5 is a cross sectional viaaw of the anvil shown in FIGURE 4. taken along the line V-V of Figure 4.
Referring now to the drawings, in particular Figure 1, there is shown an apparatus for ultrasonic welding of fabric material, which compriåe^. an ultrasonic assembly 1. The assembly 1 con)prises a pair of piezo-electric ceramic transducers 2 connected by means of a horn 3 to a welding head 4. The welding head 4 has a radiussed tip to enable the fabric material to slide easily underneath whilst it is being worked upon.
The ultrasonic assembly 1 is mqunted by means of al arm 5 to a longitudinally extending column 6 by means of linear bearings 7. This enables the arm 5 to be moved vertically, as seen in Figure 1, under the control of a control knob 8 connected to a lead screw 9 cooperating with a captive nut 10 attached to the arin 5. 'I he control column is damped by means of compression spring 11 to enable the ultrasonic assembly 1 to move slightly to accomodate variations in thickness of the layers of ma;e:-ial being welded.
In the embodiment shown in Figure 1 tht anvil comprises a ceramic or metal plate 12 which is releasably coupled to a traveller 13 adapted to move along rods 14, one of which may be a screw jack, in a direction transverse lo the longitudinal axis of the ultrasonic assembly 1.
At least the upper, as shown in Figures 1 and 2, surface of the anvil is provided with a plurality of asperities or protrusions. Each asperity will cause focusing of the ultrasonic vibration in the working zone to produce a spot we'd adjacent the point of the asperity.
Hence the number, the spacing and height of the asperities will determine the weld density characteristics.
As stated above, the anvil 12 is movable translationally oy virtue of it being connecting to the traveller 13, whereby the working zone under tn static ultrasonic assembly 1 will effectively move across the anvil 12.
A plurality of differently sized planar reclangular anil. 12 may be provided to accommodate different sizes of stockings or socks. as will be described in n;a:e detail below.
In an alternative embodiment, not sh(,'n, the anvil could be a cylinder having an external surface provided with asperities as described herein. In this case. the cylindrical anvil could be rotated to move the working zone around the circjtnfe' ilce of the cylinder. Appropriate means for moving the cylinder rotationally would be pr('."ided.
The anvil 12 may be of ceramic material, in which case the anvil may be formed by coating spherical particles on to a ceramic base and sintering t form an integral structure, wherein the spherical particles form the asperities necessary for the invention. Alternatively the anvil may be metallic with the asperities pic,duced by metal spraying or sputtering techniques.
Other forms of anvil are of course possible.
Referring now to the method of use of this apparatus, s citically, but by way of example only, in connection with joining nylon stockings to polyester elasticated lace garters, the top of the stocking 15 is placed around the anvil, which ie so dimensioned as to act as a mandrel to stretch the material to an appropriate degree of rension. The nylon fabric must be stretched sufficiently to hold the material on to the anvil, the size of which should be such that the degree of stretch is optimised in that too great a degree of stretch would thin the fabric excessively and lead to severe rucla lg after welding and may also be prone to failure by excessive local heating.If the degree of tension is too low the material would not move with the anvil and thereby the material may be caused to ruckle as the head working zone moves across the surface of the anvil. Ii could also cause l-leven tension in the fabric layers and differential ruckling after welding.
The nylon material 15, which is folder double at its t39, edge, as shown in Figure 2, is therefore in contact with some of the asperities 16 of lye anvil 12. A length of polyester elasticated lace material 17 is then fetl lo the nylon st)f.,king material 15 so that at least a portion thereof overlaps the double fol(lt'd nylon stocking top at the working zone.
The ultrasonic assembly 1 is then lowered to contact the upper surface of the polyester lace material which may thereafter be fed continuously under appropriate tension to the working zone, or may be wrapped around the anvil again under appropriate tension, optionally using a predetermined length of garter material for each stocking top.
In the case of a, cylindrical anvil, an entire stocking top may be welded to its garter in a single rotation of the anvil. In the case of a planar aii':l it may be necessary to either reposition the stocking on the anvil or rotate the anvil through 1800 after one pass and then reverse its direction of translational movement so that a second pass welds the other side of the stocking to the garter.
As stated above, lace such as is used as the polyester clasticated garter material, is intrinsically provided with a large number of holes. Any attempt to join such material to a more continuous type of material such as woven nylon :quires a secure contact at those points of the lace where the polyester malerial is present. In the present invention, depending on the spacing, number and height of the asperities of the anvil, a plurality of potential spot welds are available. Where the lace material is present, the spot welds will be produced.
Where there is a hole in the lace material, the ultrasoni assembly 1 will follow any dip in the layers of material, biased by the spring 11, and will simply weld the folded over layers of nylon together.
As stated above, the size of the anvil may need to be varied to accommodate different sizes of stocking or sock so as to keep them under the appropriate degree of tension. Each anvil may be attached to the traveller 13 by iiieans of a simile wing nut or by other appropriate means in the case of a cylindrical anvil.
The invention has been described by w;ly of welding a polyester lace garter strip to a nylon stocking. However, the invention is lìOI limited to weldilig these two materials and may be used to weld other suitable fabric material or plastics material using two or more layers of such material.

Claims (9)

CLAIMS:
1. An apparatus for ultrasonic welding together of two or more layers of fabric materials comprising an ultrasonic assembly of piezo electric transducer means to generate a longitudinal vibration, a horn operatively connected thereto, and a welding head operatively connected thereto, the assembly having such a configuration and length that a standing wave of one half wavelength or an operative multiple thereof is creatable between the head and the trallsducer meals. an anvil means having a plurality of asperities and being adapted to receive tulle fabric materials. Inealls to move the ultrasonic assembly in a longitudillal direction to bring the head into contact with a portion of the fabric materials, and means to move the anvil means in a transverse direction whereby said portion of the fabric materials received thereon is moved past tile head to bring another portion into a working zone between tile anvil and the head of the ultrasonic assembly.
2. An apparatus as described in claim 1, wherein the ultrasonic vibration is in the region of 20-10kHz. optionally in the region of 30 kHz.
3. An apparatus as described in either claim 1 or claim 2. wherein the ultrasonic assembly is so resiliently mounted as to enable the head to maintain contact with the fabric layers over a range of variations of thickness thereof.
4. An apparatus as described in any one of the preceding claims, wherein the anvil means is of ceramic material.
5. An apparatus as described in claim 4, wherein the surface of the anvil is roughened to produce the asperities.
6. An apparatus as described in claim 4, wherein asperities are formed by coating spherical particles onto a ceramic base and intering to form an integral structure.
7. An apparatus as described in any one of claims 1 to 3, wherein the anvil means is ol metal, in which case the asperities may be produced by metal spraying or by metal sputtering.
8. A method of ultrasonically welding together two or more layers of fabric materials, comprising providing an anvil means having a plurality of asperities removably attaching at least one fabric layer thereto under a predetermined degree of tension, placing another layer of fabric material over said at least one fabric layer at a workiiig zone of said anvil. providilzr an ultrasonic assembly colnprisillg piezo electric transducer means, horn and welding head, moving said assembly in a longitudinal direction so that the head thereof contacts an outermost layer of fabric material at said working zone, actuating said piezo electric transducer means to produce ultrasonic vibrations at said head, and moving said anvil means in a transverse direction so that said working zone remains adjacent the head of said assembly as the surface of the anvil means moves.
9. A method as claimed in claim 8. wherein said ultrasonic vibrations are in the region of 20-40 kHz. preferably in the region of 50 I;Hz.
GB9506963A 1995-04-04 1995-04-04 Method and apparatus for ultrasonic welding of materials Expired - Lifetime GB2299538B (en)

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GB9506963A GB2299538B (en) 1995-04-04 1995-04-04 Method and apparatus for ultrasonic welding of materials

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Application Number Priority Date Filing Date Title
GB9506963A GB2299538B (en) 1995-04-04 1995-04-04 Method and apparatus for ultrasonic welding of materials

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GB2299538A true GB2299538A (en) 1996-10-09
GB2299538B GB2299538B (en) 1998-11-04

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1167549A (en) * 1966-12-09 1969-10-15 Radyne Ltd Improvements relating to Ultrasonic Welding
GB1322849A (en) * 1970-11-27 1973-07-11 Branson Instr Ultrasonic seaming apparatus
US4070217A (en) * 1975-01-16 1978-01-24 The Fiberwoven Corporation Method of making electric blanket shell
US5147082A (en) * 1987-08-17 1992-09-15 Siemens Aktiengesellschaft Tool configuration for ultrasonic welding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1167549A (en) * 1966-12-09 1969-10-15 Radyne Ltd Improvements relating to Ultrasonic Welding
GB1322849A (en) * 1970-11-27 1973-07-11 Branson Instr Ultrasonic seaming apparatus
US4070217A (en) * 1975-01-16 1978-01-24 The Fiberwoven Corporation Method of making electric blanket shell
US5147082A (en) * 1987-08-17 1992-09-15 Siemens Aktiengesellschaft Tool configuration for ultrasonic welding

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Publication number Publication date
GB9506963D0 (en) 1995-05-24
GB2299538B (en) 1998-11-04

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