JP2005224966A - Resin product welding method - Google Patents

Resin product welding method Download PDF

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Publication number
JP2005224966A
JP2005224966A JP2004033036A JP2004033036A JP2005224966A JP 2005224966 A JP2005224966 A JP 2005224966A JP 2004033036 A JP2004033036 A JP 2004033036A JP 2004033036 A JP2004033036 A JP 2004033036A JP 2005224966 A JP2005224966 A JP 2005224966A
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Prior art keywords
thermoplastic resin
welding
resin product
ultrasonic
resin products
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JP2004033036A
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Japanese (ja)
Inventor
Yasuo Noguchi
康夫 野口
Masaru Shibata
勝 柴田
Yukihiko Sakaguchi
幸彦 坂口
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Sumitomo Bakelite Co Ltd
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Sumitomo Bakelite Co Ltd
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Priority to JP2004033036A priority Critical patent/JP2005224966A/en
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    • 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
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • 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
    • B29C66/114—Single butt 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
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
    • B29C66/536—Joining substantially flat single elements to hollow articles to form tubular articles
    • 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
    • B29C66/83—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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9513—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools characterised by specific vibration frequency values or ranges
    • 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
    • B29C65/40—Applying molten plastics, e.g. hot melt
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • 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
    • B29C66/80—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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9517—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools characterised by specific vibration amplitude values or ranges

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

Abstract

<P>PROBLEM TO BE SOLVED: To simply and precisely weld even a relatively large-sized thermoplastic resin product for a short time by ultrasonic welding. <P>SOLUTION: The thermoplastic resin products 1 each of which is composed of a receiving body 1A and a plate-like body 1B are passed while brought into contact with the leading end of an ultrasonic horn 10 by a conveyor 12. In this case, the ultrasonic horn 10 for conducting an ultrasonic vibration of 1-28 kHz is arranged over the whole width of the thermoplastic resin products 1 not only to uniaxially apply ultrasonic vibration over the whole width of the thermoplastic resin products 1 but also to continuously apply the uniaxial ultrasonic vibration to the thermoplastic resin products 1 in its advance direction to melt and bond the bonding surfaces 1a, 1b of both of them by friction heat due to vibration. The leading end part 10a coming into contact with the thermoplastic resin products 1 of the ultrasonic horns 10 are formed into a curved shape to be brought to the linear contact with the thermoplastic resin products 1. The pressure force of the leading end parts 10a of the ultrasonic horns 10 to the thermoplastic resin products 1 is controlled to 0.1-3 N. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、例えば、熱可塑性樹脂製品に超音波振動を付与して、その摩擦熱により熱可塑性樹脂製品を溶着する樹脂製品の溶着方法の改良に関するものである。   The present invention relates to an improvement in a method for welding a resin product in which, for example, ultrasonic vibration is applied to a thermoplastic resin product and the thermoplastic resin product is welded by frictional heat.

例えば、インジェクション成型品等の熱可塑性樹脂製品を相互に溶着する方法の一つとして、一般に、一方の樹脂製品に接着剤を添着後、この接着剤をオーブン等により加熱して硬化させる方法が知られている。しかし、この熱溶着では、全体を一度に溶着することはできるものの、加熱のためのオーブンに大きな設置スペースを要し、また、加熱の際に悪臭が発生したり、処理に長時間を要する問題があった。   For example, as a method for welding thermoplastic resin products such as injection molded products to each other, generally, a method is known in which an adhesive is attached to one resin product and then the adhesive is heated and cured in an oven or the like. It has been. However, with this thermal welding, although the whole can be welded at once, a large installation space is required in the oven for heating, and a bad odor is generated during the heating, and the processing requires a long time. was there.

これらの問題点については、熱可塑性樹脂製品に、例えば、３００ＫＨｚ等の数百ＫＨｚ程度の超音波振動を付与して、その摩擦熱により熱可塑性樹脂製品を溶融させて接着することにより回避することができる（例えば、特許文献１及び特許文献２参照）。   These problems should be avoided by applying ultrasonic vibration of several hundred KHz such as 300 KHz to the thermoplastic resin product, and melting and bonding the thermoplastic resin product by the frictional heat. (For example, refer to Patent Document 1 and Patent Document 2).

この超音波溶着においては、振動子により発生した超音波を熱可塑性樹脂製品に伝達する超音波ホーンが、高周波を維持するために、例えば、先端が円筒形状等の比較的小型な形状に形成されるため大きな設置スペースを要しない反面、それが故に一方でスポット的な溶着を連続的に行うことが必要となり、一度に広範囲を溶着することができず、処理に時間と手間を要する問題があった。このため、一般に、比較的大型の樹脂製品の溶着には適さず、超音波溶着の有利な点を活かすことはできなかった。   In this ultrasonic welding, an ultrasonic horn that transmits ultrasonic waves generated by a vibrator to a thermoplastic resin product is formed in a relatively small shape such as a cylindrical shape in order to maintain a high frequency. Therefore, it does not require a large installation space, but on the other hand, it is necessary to perform spot welding continuously, so that it is not possible to weld a wide area at a time, and there is a problem that processing takes time and labor. It was. For this reason, it is generally not suitable for welding relatively large resin products, and the advantages of ultrasonic welding cannot be utilized.

また、この超音波溶着においては、振動子が取り付けられた超音波ホーンを、熱可塑性樹脂製品に接触させて、超音波振動を付与するものであるが、その際に、超音波ホーンの熱可塑性樹脂製品への接触面が、熱可塑性樹脂製品に損傷や断列等を与えるおそれがあるという欠点を有していた。   In this ultrasonic welding, an ultrasonic horn with a vibrator attached is brought into contact with a thermoplastic resin product to impart ultrasonic vibrations. The contact surface to the resin product has a drawback that the thermoplastic resin product may be damaged or disconnected.

一方、振動治具により、例えば、５０ＫＨｚ〜５００Ｈｚ等の数百Ｈｚ程度の低い周波数で数十μｍの振幅の振動を熱可塑性樹脂製品全体に伝導し、この振動による摩擦熱により、熱可塑性樹脂製品の接合面を溶融させて溶着する振動溶着も知られている（例えば、特許文献３参照）。しかし、この振動溶着においては、接合面にとげやバリが発生することがあり、製品精度に影響を与えることがあった。   On the other hand, vibration with a vibration frequency of several tens of μm is conducted to the entire thermoplastic resin product at a low frequency of about several hundreds Hz, such as 50 KHz to 500 Hz, and the thermoplastic resin product is caused by frictional heat caused by this vibration. Also known is vibration welding in which the joint surfaces are melted and welded (see, for example, Patent Document 3). However, in this vibration welding, thorns and burrs may occur on the joint surface, which may affect product accuracy.

このように、従来は、いずれの溶着方法によっても、小さなスペースで迅速に、仕上がりが良好な溶着物を製造することはできないのが現状であった。特に、仕上がり状態が最も良好な超音波溶着において、比較的大型の熱可塑性樹脂製品を迅速に処理することができないのが現状であった。
特開平６−２９３０７６号公報 特開平６−２９３０７７号公報 特開平５−１２５８２３号公報 As described above, conventionally, it is impossible to produce a welded article with a good finish quickly in a small space by any welding method. In particular, in ultrasonic welding with the best finished state, it has been impossible to process a relatively large thermoplastic resin product quickly.
JP-A-6-293076 JP-A-6-293077 JP-A-5-125823

本発明が解決しようとする課題は、上記の問題点に鑑み、比較的大型の樹脂製品であっても、超音波溶着により、小さなスペースで迅速に、かつ、良好な仕上がりで溶着することができる樹脂製品の溶着方法を提供することにある。   In view of the above problems, the problem to be solved by the present invention is that even a relatively large resin product can be welded quickly and in a good finish in a small space by ultrasonic welding. The object is to provide a method for welding resin products.

本発明は、上記の課題を解決するための第１の手段として、超音波ホーンにより熱可塑性樹脂製品に超音波振動を付与して複数の熱可塑性樹脂製品を相互に溶着する樹脂製品の溶着方法において、１ｋＨｚ〜２８ＫＨｚの超音波振動を伝導する超音波ホーンを熱可塑性樹脂製品の全幅にわたって配置して熱可塑性樹脂製品の全幅にわたり一軸状に超音波振動を付与し、この超音波振動を熱可塑性樹脂製品又は超音波ホーンの進行方向に連続的に付与することを特徴とする樹脂製品の溶着方法を提供するものである。   As a first means for solving the above-mentioned problems, the present invention provides a method for welding a resin product, in which a plurality of thermoplastic resin products are welded to each other by applying ultrasonic vibration to the thermoplastic resin product using an ultrasonic horn. The ultrasonic horn that conducts the ultrasonic vibration of 1 kHz to 28 KHz is disposed over the entire width of the thermoplastic resin product, and the ultrasonic vibration is applied uniaxially over the entire width of the thermoplastic resin product. The present invention provides a resin product welding method characterized by being continuously applied in the direction of travel of a resin product or an ultrasonic horn.

本発明は、上記の課題を解決するための第２の手段として、上記第１の解決手段において、超音波ホーンの熱可塑性樹脂製品に接する先端部を、曲面形状に形成して熱可塑性樹脂製品に線接触させることを特徴とする樹脂製品の溶着方法を提供するものである。   As a second means for solving the above-mentioned problems, the present invention provides a thermoplastic resin product in which the tip part of the ultrasonic horn in contact with the thermoplastic resin product is formed in a curved shape in the first solution means. It is intended to provide a method for welding resin products, characterized in that the resin products are brought into line contact with each other.

本発明は、上記の課題を解決するための第３の手段として、上記第１又は第２のいずれかの解決手段において、超音波ホーンの熱可塑性樹脂製品に接する先端部を、熱可塑性樹脂製品に対して０．１Ｎ〜３Ｎの加圧力で接触させることを特徴とする樹脂製品の溶着方法を提供するものである。   As a third means for solving the above-described problems, the present invention provides a thermoplastic resin product in which the tip portion of the ultrasonic horn in contact with the thermoplastic resin product is a thermoplastic resin product in either the first or second solving means. The method of welding resin products is characterized in that it is brought into contact with a pressure of 0.1N to 3N.

本発明は、上記の課題を解決するための第４の手段として、上記第１乃至第３のいずれかの解決手段において、超音波ホーンを、並列に配置された複数のホーン単体から形成して、熱可塑性樹脂製品の全幅にわたって一軸状に超音波振動を付与することを特徴とする樹脂製品の溶着方法を提供するものである。   According to the present invention, as a fourth means for solving the above-described problem, in any one of the first to third solving means, an ultrasonic horn is formed from a plurality of horns arranged in parallel. The present invention also provides a method for welding resin products, characterized in that ultrasonic vibration is applied uniaxially over the entire width of a thermoplastic resin product.

本発明は、上記の課題を解決するための第５の手段として、上記第１乃至第４のいれかの解決手段において、複数の熱可塑性樹脂製品をホットメルト剤を介して溶着することを特徴とする樹脂製品の溶着方法を提供するものである。   As a fifth means for solving the above-mentioned problems, the present invention is characterized in that in any one of the first to fourth solving means, a plurality of thermoplastic resin products are welded via a hot melt agent. A method for welding resin products is provided.

本発明は、上記の課題を解決するための第６の手段として、上記第５の解決手段において、ホットメルト剤を、複数の熱可塑性樹脂製品のうちの少なくとも一方の接合面に沿って形成された溝内に充填することを特徴とする樹脂製品の溶着方法を提供するものである。   The present invention provides, as a sixth means for solving the above-mentioned problems, in the fifth solution means, wherein the hot melt agent is formed along at least one joining surface of a plurality of thermoplastic resin products. The present invention provides a method for welding resin products characterized by filling in a groove.

本発明は、上記の課題を解決するための第７の手段として、上記第６の解決手段において、ホットメルト剤が充填される溝の縦断面を、矩形状に形成することを特徴とする樹脂製品の溶着方法を提供するものである。   As a seventh means for solving the above-mentioned problems, the present invention provides a resin characterized in that in the sixth solving means, the longitudinal section of the groove filled with the hot melt agent is formed in a rectangular shape. A method for welding products is provided.

本発明は、上記の課題を解決するための第８の手段として、上記第５乃至第７のいずれかの解決手段において、ホットメルト剤として液状のエチレン酢酸ビニル共重合体を使用することを特徴とする樹脂製品の溶着方法を提供するものである。   As an eighth means for solving the above-mentioned problems, the present invention is characterized in that in any of the fifth to seventh solving means, a liquid ethylene-vinyl acetate copolymer is used as a hot melt agent. A method for welding resin products is provided.

本発明によれば、上記のように、超音波の周波数帯域を１ｋＨｚ〜２８ＫＨｚに限定する分、全幅が１ｍ程度の比較的大型の熱可塑性樹脂製品であっても、超音波ホーンをその全幅にわたって配置することを可能として、熱可塑性樹脂製品の全幅にわたり全長方向に連続的にスキャンして溶着するため、超音波溶着において、手間と時間と大きなスペースを要しない溶着を実現することができる実益がある。   According to the present invention, as described above, since the ultrasonic frequency band is limited to 1 kHz to 28 KHz, even if it is a relatively large thermoplastic resin product having a total width of about 1 m, the ultrasonic horn is extended over the entire width. Since it is possible to arrange and continuously scan and weld in the full length direction over the entire width of the thermoplastic resin product, in ultrasonic welding, it is possible to realize welding that does not require labor, time and large space is there.

また、本発明によれば、上記のように、超音波ホーンの熱可塑性樹脂製品に接する先端部を、曲面形状に形成して熱可塑性樹脂製品に線接触させているため、熱可塑性樹脂製品に損傷を与えることがなく、良好な仕上がりの溶着物を製造することができる実益がある。   In addition, according to the present invention, as described above, the tip portion of the ultrasonic horn that is in contact with the thermoplastic resin product is formed in a curved shape and is in line contact with the thermoplastic resin product. There is an advantage that a welded product having a good finish can be produced without damage.

また、本発明によれば、上記のように、超音波ホーンの熱可塑性樹脂製品に接する先端部を、熱可塑性樹脂製品に対して０．１Ｎ〜３Ｎの低い加圧力で接触させているため、熱可塑性樹脂製品に損傷を与えることなく、良好な仕上がりの溶着物を製造することができる実益がある。   In addition, according to the present invention, as described above, the tip of the ultrasonic horn that is in contact with the thermoplastic resin product is brought into contact with the thermoplastic resin product with a low pressure of 0.1 N to 3 N. There is an advantage that a welded product having a good finish can be produced without damaging the thermoplastic resin product.

本発明によれば、上記のように、超音波ホーンを、並列に配置された複数のホーン単体から形成しているため、各ホーン単体自体は比較的小型に形成する等して製造等の取扱いを容易とすることができると共に、このホーン単体の設置個数を、熱可塑性樹脂製品の全幅に応じて適宜設定することにより様々な大きさの熱可塑性樹脂製品の迅速な超音波溶着に適切に対応することができる実益がある。   According to the present invention, as described above, since the ultrasonic horn is formed from a plurality of horn units arranged in parallel, each horn unit itself is formed in a relatively small size, etc. The number of horn units installed can be set appropriately according to the total width of the thermoplastic resin product, so that it can properly respond to rapid ultrasonic welding of various sizes of thermoplastic resin products. There are real benefits that can be done.

本発明によれば、上記のように、複数の熱可塑性樹脂製品を、振動熱により溶融するホットメルト剤を介して溶着しているため、溶着した接合面においてとげやバリが発生することがないと共に簡易に強固に溶着することができ、良好な仕上がりの溶着物を製造することができる実益がある。   According to the present invention, as described above, since a plurality of thermoplastic resin products are welded via the hot melt agent that is melted by vibration heat, no thorns or burrs are generated on the welded joint surfaces. In addition, there is an advantage that it is possible to easily and firmly weld, and to produce a welded article having a good finish.

この場合、本発明によれば、特に、ホットメルト剤を、複数の熱可塑性樹脂製品のうちの少なくとも一方の接合面に沿って形成された溝内に充填して、接合しているため、振動による溶着に際し、ホットメルト剤がはみ出す等して製品の精度を低下させることがなく、良好な仕上がりの溶着物を製造することができる実益がある。   In this case, according to the present invention, in particular, the hot melt agent is filled in the groove formed along the joining surface of at least one of the plurality of thermoplastic resin products and joined. There is an advantage that it is possible to manufacture a welded product with a good finish without deteriorating the accuracy of the product due to the hot melt agent protruding or the like.

本発明によれば、上記のように、ホットメルト剤が充填される溝の縦断面を、矩形状に形成しているため、ホットメルト剤と熱可塑性樹脂製品との接触面積を大きくとることができ、より強固にかつ確実に複数の樹脂製品を溶着することができる実益がある。   According to the present invention, as described above, since the longitudinal section of the groove filled with the hot melt agent is formed in a rectangular shape, the contact area between the hot melt agent and the thermoplastic resin product can be increased. There is an advantage that a plurality of resin products can be welded more firmly and securely.

本発明によれば、上記のように、ホットメルト剤として液状のエチレン酢酸ビニル共重合体（ＥＶＡ）を使用しているため、接合面への塗布や充填に際して、飛散したりすることがなく、特に液状とした場合には、プログラミングされた自動塗布装置等により接合面に簡易に塗布又は充填することができる実益がある。   According to the present invention, as described above, since a liquid ethylene vinyl acetate copolymer (EVA) is used as a hot melt agent, it does not scatter during application or filling to the joint surface, In particular, when the liquid is used, there is an advantage that the joint surface can be simply applied or filled by a programmed automatic application device or the like.

本発明の実施の形態を図面を参照しながら詳細に説明すると、図１は本発明の熱可塑性樹脂製品１の溶着方法を実施する状態の概略を示し、この溶着方法は、例えば、ポリエチレン、ポリプロピレン、塩化ビニル樹脂等から形成された熱可塑性樹脂製品１に超音波振動を付与して、複数の熱可塑性樹脂製品１を相互に溶着するものである。   An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an outline of a state in which a method for welding a thermoplastic resin product 1 according to the present invention is carried out. A plurality of thermoplastic resin products 1 are welded to each other by applying ultrasonic vibration to the thermoplastic resin product 1 formed of vinyl chloride resin or the like.

具体的には、図示の実施の形態では、例えばインジェクション成形された受容体１Ａと、この受容体１Ａに溶着されるべき板状体１Ｂとを溶着する状態が示されており、これらの受容体１Ａ及び板状体１Ｂの接合面に、超音波ホーン１０により超音波振動を付与して、この超音波振動による摩擦熱によって、受容体１Ａ及び板状体１Ｂの接合面を溶融させて、相互に接着する方法である。   Specifically, in the illustrated embodiment, for example, a state in which a receptor 1A formed by injection molding and a plate-like body 1B to be welded to the receptor 1A are welded is shown. Ultrasonic vibration is applied to the joint surfaces of 1A and the plate-like body 1B by the ultrasonic horn 10, and the joint surfaces of the receiver 1A and the plate-like body 1B are melted by the frictional heat generated by the ultrasonic vibrations. It is a method to adhere to.

図示の実施の形態では、この溶着方法を実施する装置として、超音波ホーン１０と、この超音波ホーン１０の下方を通過することができるコンベア１２が用いられているのが示されている。超音波ホーン１０は、図１及び図２に示すように、振動子１４に接続され、この振動子１４により発生した振動を超音波振動として、熱可塑性樹脂製品１に付与するものである。一方、コンベア１２は、図１及び図２に示すように、溶着すべき熱可塑性樹脂製品１を、固定的に設置された超音波ホーン１０の下方に搬送して超音波ホーン１０を通過させるものである。従って、図示の実施の形態では、溶着すべき熱可塑性樹脂製品１が移動することにより、超音波ホーン１０の下方を通過して受容体１Ａと板状体１Ｂとが溶着される。   In the illustrated embodiment, an ultrasonic horn 10 and a conveyor 12 that can pass under the ultrasonic horn 10 are used as apparatuses for performing this welding method. As shown in FIGS. 1 and 2, the ultrasonic horn 10 is connected to a vibrator 14, and applies vibration generated by the vibrator 14 to the thermoplastic resin product 1 as ultrasonic vibration. On the other hand, the conveyor 12, as shown in FIGS. 1 and 2, conveys the thermoplastic resin product 1 to be welded below the ultrasonic horn 10 that is fixedly installed, and allows the ultrasonic horn 10 to pass therethrough. It is. Therefore, in the illustrated embodiment, when the thermoplastic resin product 1 to be welded moves, the receiver 1A and the plate-like body 1B are welded by passing below the ultrasonic horn 10.

この装置を使用した本発明の溶着方法の処理手順を詳細に述べると、まず、図１及び図２に示すように、溶着すべき熱可塑性樹脂製品１を、コンベア１２等の搬送手段上に載置する。この場合、後述する超音波振動が、受容体１Ａと板状体１Ｂとの接合面１ａ、１ｂ（図３及び図４参照）に確実に伝導するように、肉厚の薄い板状体１Ｂの方を上方に配置して、コンベア１２上に載置する。   The processing procedure of the welding method of the present invention using this apparatus will be described in detail. First, as shown in FIGS. 1 and 2, the thermoplastic resin product 1 to be welded is placed on a conveying means such as a conveyor 12 or the like. Put. In this case, the thin plate-like body 1B of the thin-walled body 1B is surely transmitted to the joining surfaces 1a, 1b (see FIGS. 3 and 4) between the receptor 1A and the plate-like body 1B. Is placed on the conveyor 12.

次いで、コンベア１２を駆動して、図１及び図２に示すように、熱可塑性樹脂製品１を、超音波ホーン１０の下方に搬送して、超音波ホーン１０に接触させながら通過させる。熱可塑性樹脂製品１である受容体１Ａ及び板状体１Ｂは、この超音波ホーン１０に接触しながら通過する際に、超音波ホーン１０から超音波振動を付与されることにより、この振動による摩擦熱で、その接合面１ａ、１ｂが溶融して相互に一体的に接合され、これにより溶着される。   Next, the conveyor 12 is driven, and as shown in FIGS. 1 and 2, the thermoplastic resin product 1 is conveyed below the ultrasonic horn 10 and allowed to pass while contacting the ultrasonic horn 10. When the receiver 1 </ b> A and the plate-like body 1 </ b> B, which are the thermoplastic resin products 1, pass while contacting the ultrasonic horn 10, the ultrasonic horn 10 applies ultrasonic vibrations to thereby cause friction due to the vibrations. The joining surfaces 1a and 1b are melted by heat and are integrally joined to each other, thereby being welded.

この場合、本発明においては、超音波ホーン１０は、１ｋＨｚ〜２８ＫＨｚの超音波振動を熱可塑性樹脂製品１に伝導するように設定されている。このように超音波の周波数帯域を１ｋＨｚ〜２８ＫＨｚに限定する分、超音波ホーン１０の全幅を比較的大きく、具体的には、約１ｍ程度に設定することも可能となる。本発明においては、このように比較的大型に設定された超音波ホーン１０を、特に図１に示すように、溶着すべき熱可塑性樹脂製品１の全幅にわたって配置している。   In this case, in the present invention, the ultrasonic horn 10 is set so as to conduct ultrasonic vibration of 1 kHz to 28 KHz to the thermoplastic resin product 1. Thus, by limiting the ultrasonic frequency band to 1 kHz to 28 KHz, the entire width of the ultrasonic horn 10 can be set relatively large, specifically, about 1 m. In the present invention, the ultrasonic horn 10 set to a relatively large size as described above is disposed over the entire width of the thermoplastic resin product 1 to be welded, particularly as shown in FIG.

従って、超音波溶着でありながら、全幅が１ｍ程度の比較的大型の熱可塑性樹脂製品１であっても、その全幅にわたり一軸状に超音波振動を付与することができる。即ち、比較的大型の熱可塑性樹脂製品１についても、その全幅方向を一度に溶着することができる。そして、本発明では、この熱可塑性樹脂製品１の全幅にわたる一軸状の超音波振動を、上述したようにコンベア１２により超音波ホーン１０を通過する熱可塑性樹脂製品１に、その熱可塑性樹脂製品１の進行方向に連続的に付与しているため、熱可塑性樹脂製品１を、超音波ホーン１０の下方を通過させてスキャンするだけで、受容体１Ａと板状体１Ｂとを超音波溶着することができる。従って、超音波溶着に、多大な手間と時間を要することがないと同時に、オーブンのような大型の設備も要しない。   Therefore, even if it is ultrasonic welding, even if it is a comparatively large thermoplastic resin product 1 whose total width is about 1 m, ultrasonic vibration can be applied uniaxially over the entire width. In other words, the entire width direction of the relatively large thermoplastic resin product 1 can be welded at a time. In the present invention, the uniaxial ultrasonic vibration over the entire width of the thermoplastic resin product 1 is applied to the thermoplastic resin product 1 passing through the ultrasonic horn 10 by the conveyor 12 as described above. Since the thermoplastic resin product 1 is passed through the ultrasonic horn 10 and scanned, the receiver 1A and the plate-like body 1B are ultrasonically welded. Can do. Therefore, ultrasonic welding does not require much labor and time, and at the same time, does not require a large facility such as an oven.

この超音波の周波数及び超音波ホーン１０の大きさは、溶着すべき熱可塑性樹脂製品１の全幅にわたって超音波ホーン１０を配置することができれば、その熱可塑性樹脂製品１の大きさに合わせて適宜設定することができ留。例えば、周波数を低く設定する程超音波ホーン１０を大型に設定することができるため、例えば１ｍ程度の大型の熱可塑性樹脂製品に適した処理とすることができ、一方、周波数を高く設定する程超音波ホーン１０を小さく設定することができるため、例えば、全幅が３０ｃｍ程度の熱可塑性樹脂製品１の場合には、その全幅にわたって超音波ホーン１０を配置して、全幅方向を一度に溶着しつつ、精度良く超音波溶着することができる。   If the ultrasonic horn 10 can be disposed over the entire width of the thermoplastic resin product 1 to be welded, the frequency of the ultrasonic wave and the size of the ultrasonic horn 10 are appropriately set according to the size of the thermoplastic resin product 1. Can be set For example, since the ultrasonic horn 10 can be set to a larger size as the frequency is set lower, for example, a process suitable for a large thermoplastic resin product of about 1 m can be performed, while the frequency is set higher. Since the ultrasonic horn 10 can be set small, for example, in the case of the thermoplastic resin product 1 having a total width of about 30 cm, the ultrasonic horn 10 is arranged over the entire width and the entire width direction is welded at a time. Ultrasonic welding can be performed with high accuracy.

なお、超音波とは、一般的には人間の可聴域を超える高周波、具体的には、２０ＫＨｚ以上の周波数を指すが、人の耳で直接聞くことを要しない音波という意味で、上記のように１ＫＨｚ〜２８ＫＨｚの超音波を使用することができ、この範囲内で、溶着すべき熱可塑性樹脂製品１の大きさ等に合わせて適宜適切な周波数を設定することができる。平均的には、この周波数を１８ＫＨｚ程度とすると、大型、中型、小型のいずれの熱可塑性樹脂製品であっても、一度に適切に超音波溶着することに対応することができ、望ましい。   The ultrasonic wave generally means a high frequency exceeding the human audible range, specifically, a frequency of 20 KHz or higher, but means a sound wave that does not need to be heard directly by the human ear, and is as described above. In addition, an ultrasonic wave of 1 KHz to 28 KHz can be used, and an appropriate frequency can be set within this range according to the size of the thermoplastic resin product 1 to be welded. On average, if this frequency is about 18 KHz, any large, medium, or small thermoplastic resin product can cope with appropriate ultrasonic welding at a time, which is desirable.

また、超音波ホーン１０は、図示の実施の形態においては、図１及び図２に示すように、熱可塑性樹脂製品１（板状体１Ｂ）に接する先端部１０ａが、曲面形状に形成されている。このため、超音波ホーン１０は、図２に示すように、熱可塑性樹脂製品１に線接触するため、熱可塑性樹脂製品１の進行方向における複数の箇所で熱可塑性樹脂製品に加圧することがなく引っ張り等による損傷を熱可塑性樹脂製品１に与えることがなく、良好な仕上がりの溶着物を製造することができる。   Further, in the illustrated embodiment, the ultrasonic horn 10 has a curved end shape with a tip portion 10a in contact with the thermoplastic resin product 1 (plate-like body 1B) as shown in FIGS. Yes. For this reason, since the ultrasonic horn 10 is in line contact with the thermoplastic resin product 1 as shown in FIG. 2, there is no pressure on the thermoplastic resin product at a plurality of locations in the traveling direction of the thermoplastic resin product 1. The thermoplastic resin product 1 is not damaged by pulling or the like, and a welded product with a good finish can be manufactured.

更に、本発明においては、この超音波ホーン１０の熱可塑性樹脂製品１に接する先端部１０ａの熱可塑性樹脂製品１に対する加圧力を制御して、超音波ホーン１０の先端部１０ａが０．１Ｎ〜３Ｎの比較的低い加圧力で熱可塑性樹脂製品１に接触するように設定している。このため、より一層、熱可塑性樹脂製品１に損傷を与えることなく、良好な仕上がりの溶着物を製造することができる。具体的には、超音波ホーン１０を下方に付勢する図示しないスプリングによる押圧力の調整や、また電気的な制御システムにより達成することができる。   Furthermore, in the present invention, the pressure applied to the thermoplastic resin product 1 by the tip 10a of the ultrasonic horn 10 in contact with the thermoplastic resin product 1 is controlled, so that the tip 10a of the ultrasonic horn 10 is 0.1 N˜. The thermoplastic resin product 1 is set in contact with a relatively low pressure of 3N. For this reason, it is possible to manufacture a welded product having a good finish without further damaging the thermoplastic resin product 1. Specifically, it can be achieved by adjusting the pressing force by a spring (not shown) that urges the ultrasonic horn 10 downward, or by an electrical control system.

なお、本発明では、２５０Ｈｚ等の低周波により熱可塑性樹脂製品１を振動させる振動溶着と異なり、１ＫＨｚ以上の超音波振動を伝導しているため、振動による溶着に際し、充分にとげやバリの発生を抑制することはできるが、本発明においても、図３及び図４に示すように、溶着すべき熱可塑性樹脂製品１である受容体１Ａと板状体１Ｂとを、ホットメルト剤１６を介して、溶着することが望ましい。   In the present invention, unlike vibration welding in which the thermoplastic resin product 1 is vibrated at a low frequency of 250 Hz or the like, ultrasonic vibrations of 1 KHz or more are conducted, so that thorns and burrs are sufficiently generated during welding by vibration. However, also in the present invention, as shown in FIGS. 3 and 4, the receiver 1 </ b> A and the plate-like body 1 </ b> B, which are the thermoplastic resin products 1 to be welded, are interposed via the hot melt agent 16. It is desirable to weld.

このホットメルト剤１６は、超音波ホーン１０による超音波振動を受けて、ホットメルト剤１６自体が溶融して、受容体１Ａ及び板状体１Ｂと接着するので、受容体１Ａや板状体１Ｂの接合面１ａ、１ｂにとげやバリを発生させることなく溶着することができるのは勿論のこと、接着性が非常に高いため、受容体１Ａと板状体１Ｂとを強固に溶着することができ、良好な仕上がりの溶着物を製造することができる。   The hot melt agent 16 receives ultrasonic vibration from the ultrasonic horn 10 and the hot melt agent 16 itself melts and adheres to the receptor 1A and the plate 1B, so that the receptor 1A and the plate 1B are bonded. The bonding surfaces 1a and 1b can be welded without generating thorns or burrs, and since the adhesiveness is very high, the receptor 1A and the plate-like body 1B can be firmly welded. It is possible to produce a welded product with a good finish.

このホットメルト剤と１６としては、具体的には、液状のエチレン酢酸ビニル共重合体（ＥＶＡ）を使用することができる。ＥＶＡは相溶性や接着性に優れ、特に、これを液状として使用した場合には、超音波振動の付与によって飛散等することがないので、好適である。但し、必ずしもＥＶＡに限定されるものではなく、加水による耐腐食性等を考慮して、エチレンアクリル酸エチル共重合体（ＥＥＡ）やエチレンアクリル酸共重合体（ＥＡＡ）等を使用することもできる。   As the hot melt agent and 16, specifically, a liquid ethylene vinyl acetate copolymer (EVA) can be used. EVA is excellent in compatibility and adhesiveness. Particularly, when it is used as a liquid, it is suitable because it is not scattered by application of ultrasonic vibration. However, it is not necessarily limited to EVA, and an ethyl ethyl acrylate copolymer (EEA), an ethylene acrylic acid copolymer (EAA), or the like can be used in consideration of corrosion resistance due to water. .

この場合、具体的には、図３及び図４に示すように、板状体１Ｂに比し高さを有すると共に下方に配置される受容体１Ａに、その接合面１ａの形状に沿って溝１８を形成し、ホットメルト剤１６を、この溝１８内に充填して超音波融着することが望ましい。これにより、板状体１Ｂを受容体１Ａ上に設置した際の圧力により、ホットメルト剤１６が、受容体１Ａと板状体１Ｂとの接合面１ａ、１ｂからはみ出す等して製品の精度を低下させることがなく、良好な仕上がりの溶着物を製造することができる。   In this case, specifically, as shown in FIG. 3 and FIG. 4, a groove is formed along the shape of the joint surface 1 a in the receiver 1 A having a height as compared with the plate-like body 1 B and disposed below. 18 is formed, and the hot melt agent 16 is preferably filled in the groove 18 and ultrasonically fused. Thereby, the hot melt agent 16 protrudes from the joint surfaces 1a and 1b between the receptor 1A and the plate 1B due to the pressure when the plate 1B is placed on the receptor 1A. It is possible to produce a welded product having a good finish without being lowered.

なお、ホットメルト剤１６は、特に、液状のＥＶＡを使用した場合には、例えば、予め受容体１Ａの接合面１ａの形状（パターン）に沿って移動することができるようにプログラミングされた自動塗布装置等により、この溝１８内へ簡易に充填することができる。   The hot-melt agent 16 is an automatic coating that is programmed in advance so as to be able to move along the shape (pattern) of the joint surface 1a of the receptor 1A, for example, when liquid EVA is used. The groove 18 can be easily filled by a device or the like.

また、このホットメルト剤１６が充填される溝１８は、特に図４に示すように、その縦断面を、矩形状に形成することが望ましい。これにより、ホットメルト剤１６と熱可塑性樹脂製品（受容体１Ａ及び板状体１Ｂ）との接触面積を大きくとることができ、より強固にかつ確実に受容体１Ａと板状体１Ｂとを溶着することができる。   Further, the groove 18 filled with the hot melt agent 16 is desirably formed in a rectangular shape in a longitudinal section as shown in FIG. As a result, the contact area between the hot melt agent 16 and the thermoplastic resin product (the receiver 1A and the plate-like body 1B) can be increased, and the receiver 1A and the plate-like body 1B are welded more firmly and securely. can do.

なお、図示の実施の形態では、熱可塑性樹脂製品１を移動させて、固定的に設置された超音波ホーン１０の下を通過させる形態としたが、超音波ホーン１０を熱可塑性樹脂製品１の全幅及び全長方向にわたって接触させることができれば、その干渉方法には特に限定はなく、図１及び図２と異なり、熱可塑性樹脂製品１は固定的に設置して、超音波ホーン１０をこの熱可塑性樹脂製品１の全長方向にわたって移動させるように設定することもできる。   In the illustrated embodiment, the thermoplastic resin product 1 is moved and passed under the ultrasonic horn 10 that is fixedly installed. However, the ultrasonic horn 10 of the thermoplastic resin product 1 is used. The interference method is not particularly limited as long as it can be brought into contact with the entire width and the entire length direction. Unlike FIGS. 1 and 2, the thermoplastic resin product 1 is fixedly installed, and the ultrasonic horn 10 is made of this thermoplastic resin. It can also set so that it may move over the full length direction of the resin product 1. FIG.

また、図示の実施の形態では、単体の超音波ホーン１０を使用したが、熱可塑性樹脂製品１の全幅にわたって超音波ホーン１０を設置することができれば、超音波ホーン１０を、並列に配置された図示しない複数のホーン単体から形成することもできる。これにより、各ホーン単体自体は比較的小型に形成する等して製造等の取扱いを容易とすることができると共に、このホーン単体の設置個数を、熱可塑性樹脂製品１の全幅に応じて適宜設定することにより様々な大きさの熱可塑性樹脂製品１の迅速な超音波溶着に適切に対応することができる。この場合、単数の振動子１４を複数のホーン単体で共通に使用することもできるし、各ホーン単体毎に振動子１４を設置することもできる。後者の場合には、各ホーン単体毎の周波数を高く設定して、精度良く超音波溶着をすることができる。   In the illustrated embodiment, a single ultrasonic horn 10 is used. However, if the ultrasonic horn 10 can be installed over the entire width of the thermoplastic resin product 1, the ultrasonic horns 10 are arranged in parallel. It can also be formed from a plurality of horn units (not shown). Thereby, each horn unit itself can be formed in a relatively small size so that it can be handled easily, and the number of the horn units installed can be appropriately set according to the total width of the thermoplastic resin product 1. By doing so, it is possible to appropriately cope with the rapid ultrasonic welding of the thermoplastic resin products 1 of various sizes. In this case, a single vibrator 14 can be used in common by a plurality of horns alone, or the vibrator 14 can be installed for each horn alone. In the latter case, ultrasonic welding can be performed with high accuracy by setting a high frequency for each horn unit.

本発明は、例えば、ポリエチレン、ポリプロピレン、塩化ビニル樹脂等から形成された熱可塑性樹脂製品であれば、受容体と板状体とから成る容器状の製品に限らず、広くその溶着に適用することができ、特に、従来の超音波溶着では迅速に処理できなかった大型の熱可塑性樹脂製品の溶着に適用することができる。
容易、特に大型 The present invention is not limited to a container-like product composed of a receptor and a plate-like product, and can be widely applied to welding as long as it is a thermoplastic resin product made of polyethylene, polypropylene, vinyl chloride resin, or the like. In particular, it can be applied to the welding of large thermoplastic resin products that could not be processed quickly by conventional ultrasonic welding.
Easy, especially large

本発明の溶着方法を実施する状態の概略斜視図である。It is a schematic perspective view of the state which enforces the welding method of this invention. 本発明の溶着方法を実施する状態の概略側面図である。It is a schematic side view of the state which implements the welding method of this invention. 熱可塑性樹脂製品にホットメルト剤を充填して溶着する実施の形態の概略平面図である。It is a schematic plan view of an embodiment in which a thermoplastic resin product is filled with a hot melt agent and welded. 熱可塑性樹脂製品にホットメルト剤を充填して溶着する実施の形態の概略縦断面図である。It is a schematic longitudinal cross-sectional view of embodiment which fills a thermoplastic resin product with a hot-melt agent, and is welded.

符号の説明Explanation of symbols

１ 熱可塑性樹脂製品
１Ａ 受容体
１ａ 受容体の接合面
１Ｂ 板状体
１ｂ 板状体の接合面
１０ 超音波ホーン
１０ 超音波ホーンの先端部
１２ コンベア
１４ 振動子
１６ ホットメルト剤
１８ 溝 DESCRIPTION OF SYMBOLS 1 Thermoplastic resin product 1A Receptor 1a Receptor joined surface 1B Plate-like body 1b Plate-like joined surface 10 Ultrasonic horn 10 Ultrasonic horn tip 12 Conveyor 14 Vibrator 16 Hot melt agent 18 Groove

Claims (8)

超音波ホーンにより熱可塑性樹脂製品に超音波振動を付与して複数の前記熱可塑性樹脂製品を相互に溶着する樹脂製品の溶着方法において、１ｋＨｚ〜２８ＫＨｚの超音波振動を伝導する前記超音波ホーンを前記熱可塑性樹脂製品の全幅にわたって配置して前記熱可塑性樹脂製品の全幅にわたり一軸状に超音波振動を付与し、前記超音波振動を前記熱可塑性樹脂製品又は前記超音波ホーンの進行方向に連続的に付与することを特徴とする樹脂製品の溶着方法。 In the method of welding a resin product in which ultrasonic vibration is applied to a thermoplastic resin product by an ultrasonic horn to weld a plurality of the thermoplastic resin products to each other, the ultrasonic horn that conducts ultrasonic vibration of 1 kHz to 28 KHz is used. The ultrasonic vibration is applied uniaxially over the entire width of the thermoplastic resin product by being arranged over the entire width of the thermoplastic resin product, and the ultrasonic vibration is continuously applied in the traveling direction of the thermoplastic resin product or the ultrasonic horn. A method for welding resin products, characterized by being applied to a resin. 請求項１に記載された樹脂製品の溶着方法であって、前記超音波ホーンの前記熱可塑性樹脂製品に接する先端部を、曲面形状に形成して前記熱可塑性樹脂製品に線接触させることを特徴とする樹脂製品の溶着方法。 The method for welding a resin product according to claim 1, wherein a tip portion of the ultrasonic horn that contacts the thermoplastic resin product is formed in a curved shape and is brought into line contact with the thermoplastic resin product. A method for welding resin products. 請求項１又は請求項２のいずれかに記載された樹脂製品の溶着方法であって、前記超音波ホーンの前記熱可塑性樹脂製品に接する先端部を、前記熱可塑性樹脂製品に対して０．１Ｎ〜３Ｎの加圧力で接触させることを特徴とする樹脂製品の溶着方法。 3. The method for welding a resin product according to claim 1, wherein a tip portion of the ultrasonic horn in contact with the thermoplastic resin product is 0.1 N with respect to the thermoplastic resin product. A method for welding resin products, characterized by contacting with a pressurizing force of 3N. 請求項１乃至請求項３のいずれかに記載された樹脂製品の溶着方法であって、前記超音波ホーンを、並列に配置された複数のホーン単体から形成して、前記熱可塑性樹脂製品の全幅にわたって一軸状に超音波振動を付与することを特徴とする樹脂製品の溶着方法。 The method for welding resin products according to any one of claims 1 to 3, wherein the ultrasonic horn is formed from a plurality of horn units arranged in parallel, and the full width of the thermoplastic resin product. A method for welding resin products, characterized in that ultrasonic vibration is applied uniaxially over the entire surface. 請求項１乃至請求項４のいずれかに記載された樹脂製品の溶着方法であって、前記複数の熱可塑性樹脂製品をホットメルト剤を介して溶着することを特徴とする樹脂製品の溶着方法。 The method for welding resin products according to any one of claims 1 to 4, wherein the plurality of thermoplastic resin products are welded via a hot melt agent. 請求項５に記載された樹脂製品の溶着方法であって、前記ホットメルト剤を、前記複数の熱可塑性樹脂製品のうちの少なくとも一方の接合面に沿って形成された溝内に充填することを特徴とする樹脂製品の溶着方法。 6. The method for welding a resin product according to claim 5, wherein the hot melt agent is filled in a groove formed along a joining surface of at least one of the plurality of thermoplastic resin products. A characteristic welding method for resin products. 請求項６に記載されたに記載された樹脂製品の溶着方法であって、前記ホットメルト剤が充填される溝の縦断面を、矩形状に形成することを特徴とする樹脂製品の溶着方法。 The method for welding resin products according to claim 6, wherein a longitudinal section of the groove filled with the hot melt agent is formed in a rectangular shape. 請求項５乃至請求項７のいずれかに記載された樹脂製品の溶着方法であって、前記ホットメルト剤として液状のエチレン酢酸ビニル共重合体を使用することを特徴とする樹脂製品の溶着方法。
The method for welding resin products according to any one of claims 5 to 7, wherein a liquid ethylene-vinyl acetate copolymer is used as the hot melt agent.
JP2004033036A 2004-02-10 2004-02-10 Resin product welding method Pending JP2005224966A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105014951A (en) * 2015-06-26 2015-11-04 刘厚德 Plastic shell and assembly process thereof
WO2021262001A1 (en) 2020-06-24 2021-12-30 Technische Universiteit Delft Rounded sonotrode

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105014951A (en) * 2015-06-26 2015-11-04 刘厚德 Plastic shell and assembly process thereof
WO2021262001A1 (en) 2020-06-24 2021-12-30 Technische Universiteit Delft Rounded sonotrode
NL2025908B1 (en) * 2020-06-24 2022-02-21 Univ Delft Tech Rounded sonotrode

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