JP2006198810A - Liquid tank made of synthetic resin and its manufacturing method - Google Patents

Liquid tank made of synthetic resin and its manufacturing method Download PDF

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JP2006198810A
JP2006198810A JP2005010726A JP2005010726A JP2006198810A JP 2006198810 A JP2006198810 A JP 2006198810A JP 2005010726 A JP2005010726 A JP 2005010726A JP 2005010726 A JP2005010726 A JP 2005010726A JP 2006198810 A JP2006198810 A JP 2006198810A
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synthetic resin
divided half
liquid tank
mating surface
divided
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Minoru Yonekawa
実 米川
Toshio Takahashi
敏夫 高橋
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Kioritz Corp
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Kioritz Corp
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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
    • B29C66/01—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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B29C65/168—Laser beams making use of an absorber or impact modifier placed at the interface
    • 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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, 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
    • B29C66/50—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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow 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
    • B29C66/70—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
    • B29C66/73—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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7172—Fuel tanks, jerry cans

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a liquid tank made of a synthetic resin capable of enhancing the degree of freedom of planning, quality, function and design properties of the liquid tank and constituted so as to reduce the number of parts and the number of processes to suppress a production cost low. <P>SOLUTION: Container or lid like first and second split half bodies (11) and (12), which constitute the liquid tank (10) to be obtained made of the synthetic resin, have mating surface parts (13) and (14) brought into contact with each other and are opened on one sides thereof, are prepared and the mating surface parts (13) and (14) are irradiated with a laser beam (L), in a state that they are brought into contact with each other, to be welded to each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、内燃エンジン用燃料タンクやオイルタンク等として用いて好適な液体タンクの製造方法及び液体タンクに係り、特に、合成樹脂製液体タンクを製造する方法及び合成樹脂製液体タンクに関する。   The present invention relates to a liquid tank manufacturing method and a liquid tank suitable for use as a fuel tank or an oil tank for an internal combustion engine, and more particularly to a method for manufacturing a synthetic resin liquid tank and a synthetic resin liquid tank.

従来、車両用等の内燃エンジン用の合成樹脂製燃料タンクとして、下記特許文献１に見られるように、多層構造のパリソン（中空管状の予備成形体）を用いてブロー成形により製造するものが知られている。一方、携帯型作業機用小型空冷２サイクルガソリンエンジン等の燃料タンクには、通常、タンク内に直接燃料を入れるための注入口が設けられるとともに、エンジン（気化器等）に燃料を供給するためのホース等の接続・取り付けに供されるニップルが突設され、また、タンク内には、吸込ホースやストレーナが配在される。従来、前記ブロー成形により燃料タンクを製造する場合、前記ニップルは、下記特許文献２に見られるように、タンク本体部分とは別体に作製され、前記ブロー成形時に本体部分にインサート成形するようにされ、また、前記吸込ホースやストレーナは前記ブロー成形後にタンク内に取り付け配備するようにされている。   Conventionally, as a synthetic resin fuel tank for an internal combustion engine for a vehicle or the like, a tank manufactured by blow molding using a multi-layered parison (hollow tubular preform) as shown in Patent Document 1 below is known. It has been. On the other hand, fuel tanks such as small air-cooled two-cycle gasoline engines for portable work machines are usually provided with an inlet for directly putting fuel into the tank and for supplying fuel to the engine (vaporizer, etc.) A nipple is provided for connection and attachment of the hose and the like, and a suction hose and a strainer are disposed in the tank. Conventionally, when a fuel tank is manufactured by the blow molding, the nipple is manufactured separately from the tank main body portion as shown in Patent Document 2 below, and insert molding is performed on the main body portion during the blow molding. In addition, the suction hose and the strainer are installed in the tank after the blow molding.

特開２００４−９８９３９号公報JP 2004-98939 A 特開平９−２９０８１４号公報JP 9-290814 A

前記した如くのブロー成形による燃料タンク等の従来の合成樹脂製液体タンクの製造方法では、タンク本体部分は必然的に全体が同一の合成樹脂材料で略同厚に作製されることになり、例えば、タンク取付設置のために下半分の強度を、さほど強度を必要としない上半分より上げたくとも、そういったことを実現することが困難である等、設計自由度が低く、品質、機能、及び意匠性をアップさせることが難しいという問題があった。また、ニップル類を別途に作製し、それを前記のようにインサート成形するか、あるいは、タンク完成後に後付けするようにされるので、グロメット等が必要となり、部品点数、工数が多くなる嫌いがある。更に、吸込ホースやストレーナは、前記ブロー成形後にタンク内に取り付け配備する必要があるので、組立に熟練を要するとともに、手間と時間がかかり、製造コストが高くなるとともに、取り付けミス等が生じやすい嫌いもある。更にまた、タンク内部にセパレータ等の消波手段を付設することが難しい等の問題もある。   In the conventional method of manufacturing a synthetic resin liquid tank such as a fuel tank by blow molding as described above, the tank body part is inevitably made of the same synthetic resin material and substantially the same thickness. Even if you want to increase the strength of the lower half for installing and installing the tank from the upper half that does not require much strength, it is difficult to realize such things, such as low design freedom, quality, function, and design There was a problem that it was difficult to improve sex. In addition, since nipples are separately manufactured and insert-molded as described above or retrofitted after completion of the tank, grommets are required, and there is a discomfort that increases the number of parts and man-hours. . Furthermore, the suction hose and strainer need to be installed and installed in the tank after the blow molding, which requires skill in assembly, takes time and effort, increases manufacturing costs, and tends to cause mounting errors. There is also. Furthermore, there is a problem that it is difficult to attach a wave-absorbing means such as a separator inside the tank.

本発明は、前記のような従来の問題を解消すべくなされたもので、その目的とするところは、設計自由度、品質、機能、及び意匠性等を向上させることができるとともに、部品点数、工数を低減し得て、製造コストを低く抑えることができるようにされた合成樹脂製液体タンクの製造方法及び合成樹脂製液体タンクを提供することにある。   The present invention has been made to solve the conventional problems as described above, and the object of the present invention is to improve design flexibility, quality, function, designability, etc. It is an object of the present invention to provide a synthetic resin liquid tank manufacturing method and a synthetic resin liquid tank which can reduce the number of steps and reduce the manufacturing cost.

前記の目的を達成すべく、本発明に係る合成樹脂製液体タンクの製造方法は、基本的には、得るべき合成樹脂製液体タンクを構成する、相互に対接する合わせ面部を有する片面が開口した容器ないし蓋状の第１分割半体と第２分割半体とを用意し、前記合わせ面部同士を対接させた状態で該合わせ面部にレーザー光を照射して溶着することを特徴としている。   In order to achieve the above-mentioned object, the synthetic resin liquid tank manufacturing method according to the present invention basically has a single-sided opening having a mating surface portion that makes up the synthetic resin liquid tank to be obtained. A container or a lid-shaped first divided half and a second divided half are prepared, and the mating surfaces are welded by irradiating the mating surfaces with the mating surfaces in contact with each other.

好ましい態様では、前記第１分割半体をレーザー光透過性を持つ透過性合成樹脂で作製するとともに、前記第２分割半体をレーザー光吸収性を持つ吸収性合成樹脂で作製し、レーザー光を前記第１分割半体を介して前記合わせ面部に照射するようにされる。   In a preferred embodiment, the first divided half is made of a transparent synthetic resin having a laser light transmission property, and the second divided half is made of an absorbent synthetic resin having a laser light absorption property. The mating surface portion is irradiated through the first divided half body.

他の好ましい態様では、前記第１分割半体をレーザー光透過性を有する透過性合成樹脂で作製するとともに、前記合わせ面部間にレーザー光吸収性を有する吸収材を介在させ、レーザー光を前記第１分割半体を介して前記合わせ面部間に照射するようにされる。   In another preferred embodiment, the first divided half is made of a transparent synthetic resin having a laser beam transmission property, and an absorbing material having a laser beam absorption property is interposed between the mating surface portions, and the laser beam is transmitted through the first divided half body. Irradiation is performed between the mating surface portions through a half part.

また、好ましい具体的な態様では、前記第１分割半体及び第２分割半体に、それぞれ前記合わせ面部を形成する鍔状部を設けるようにされる。   In a preferred specific embodiment, the first divided half and the second divided half are provided with hook-shaped portions that form the mating surface portions.

他の好ましい態様では、前記第１分割半体及び／又は第２分割半体に、ニップル類を一体に成形するようにされる。   In another preferred embodiment, nipples are formed integrally with the first divided half and / or the second divided half.

他の別の好ましい態様では、得るべき合成樹脂製液体タンク内に配在すべき、ホース類やストレーナ等を、前記合わせ面部のレーザー溶着前に前記第１分割半体及び／又は第２分割半体に取り付けておくようにされる。   In another preferred embodiment, hoses and strainers to be placed in the synthetic resin liquid tank to be obtained are connected to the first divided half and / or the second divided half before laser welding of the mating surface portion. It will be attached to the body.

前記第１分割半体及び第２分割半体は、好ましくは、射出成形又は熱プレス成形により作製するようにされる。   The first and second divided halves are preferably made by injection molding or hot press molding.

一方、本発明に係る合成樹脂製液体タンクの一つは、相互に対接する合わせ面部を有する片面が開口した容器ないし蓋状の第１分割半体と第２分割半体とからなり、前記第１分割半体がレーザー光透過性を持つ透過性合成樹脂で作製されるとともに、前記第２分割半体がレーザー光吸収性を持つ吸収性合成樹脂で作製され、前記合わせ面部同士がレーザー光で溶着されていることを特徴としている。   On the other hand, one of the synthetic resin liquid tanks according to the present invention comprises a container or a lid-like first divided half and a second divided half that are open on one side having mating surface portions that are in contact with each other. One half is made of a transparent synthetic resin having laser light permeability, the second half is made of an absorbent synthetic resin having laser light absorption, and the mating surfaces are made of laser light. It is characterized by being welded.

本発明に係る合成樹脂製液体タンクの他の一つは、相互に対接する合わせ面部を有する片面が開口した容器状の第１分割半体と第２分割半体とからなり、前記第１分割半体がレーザー光透過性を持つ透過性合成樹脂で作製されるとともに、前記合わせ面部間にレーザー光吸収性を有する吸収材が介在せしめられ、前記合わせ面部同士がレーザー光で溶着されていることを特徴としている。   Another one of the synthetic resin liquid tanks according to the present invention comprises a container-like first divided half and a second divided half opened on one side having mating surface portions in contact with each other, and the first divided half The half body is made of a transparent synthetic resin having a laser beam transmission property, an absorbing material having a laser beam absorption property is interposed between the mating surface portions, and the mating surface portions are welded to each other by a laser beam. It is characterized by.

好ましい態様では、前記第１分割半体及び第２分割半体に、それぞれ前記合わせ面部を形成する鍔状部が設けられる。   In a preferred embodiment, the first divided half and the second divided half are each provided with a hook-shaped portion that forms the mating surface portion.

他の好ましい態様では、前記第１分割半体及び／又は第２分割半体に、ニップル類が一体に成形される。   In another preferred embodiment, nipples are integrally formed on the first divided half and / or the second divided half.

この場合、好ましくは、前記第１分割半体がタンクの上半分を、前記第２分割半体がタンクの下半分を形成し、前記ニップル類が前記第１分割半体に設けられる。   In this case, preferably, the first divided half forms the upper half of the tank, the second divided half forms the lower half of the tank, and the nipples are provided in the first divided half.

本発明に係る合成樹脂製液体タンクの製造方法では、得るべきタンクを、予め成形された二つの部材（第１分割半体と第２分割半体）に分割して作製し、それらの合わせ面部をレーザー溶着により接合するようにされるので、前記第１分割半体と前記第２分割半体とを射出成形や熱プレス成形等で別々に作製することが可能となり、そのため、前記第１分割半体と前記第２分割半体とを異なる合成樹脂材料で作製することも容易にできる。これにより、例えば、タンク取付設置のために、下半分（第２分割半体）の強度を、さほど強度を必要としない上半分（第１分割半体）より上げたり、下半分を形成する第２分割半体を透明材料で作製して残量計の機能を持たせたり、第１分割半体と第２分割半体とを色違い材料で作製して、意匠性美観を向上させること等が可能となり、設計自由度、品質、機能、及び意匠性等を格段に向上させることができる。   In the method for producing a synthetic resin liquid tank according to the present invention, the tank to be obtained is produced by dividing it into two members (first divided half and second divided half) that have been molded in advance, and their mating surface portions Are joined by laser welding, the first divided half and the second divided half can be separately produced by injection molding, hot press molding or the like, and therefore the first divided half The half and the second divided half can be easily made of different synthetic resin materials. Thereby, for example, for tank installation installation, the strength of the lower half (second divided half) is raised from the upper half (first divided half) which does not require much strength, or the lower half is formed. Producing two split halves with a transparent material to give the function of a fuel gauge, or creating the first and second split halves with different materials to improve the design aesthetics, etc. Thus, the degree of freedom in design, quality, function, designability and the like can be significantly improved.

また、第１分割半体及び第２分割半体を射出成形等により作製する際に、ニップル類をそれと同時に一体に成形することができるので、インサート成形やグロメット等が不要となり、従来のブロー成形による製造方法に比して、部品点数、工数を削減できるとともに、液漏れ等の不都合も防止できる。   Also, when the first divided half and the second divided half are produced by injection molding or the like, the nipples can be integrally formed at the same time, so insert molding and grommet are not required, and conventional blow molding Compared with the manufacturing method according to, the number of parts and man-hours can be reduced, and inconveniences such as liquid leakage can be prevented.

さらに、吸込ホースやストレーナは、レーザ溶着前の、片面が開口した容器ないし蓋状の第１分割半体及び第２分割半体に取付配備すればよいので、従来のブロー成形による製造方法に比して、それらの取り付け作業が極めて簡単容易となり、製造コストを大幅に抑えることができるとともに、取り付けミスを生じにくくできる。   Furthermore, the suction hose and strainer may be installed and installed in a container or lid-like first divided half and second divided half before laser welding, which is compared with a conventional blow molding manufacturing method. Thus, the attaching operation becomes very simple and easy, the manufacturing cost can be greatly suppressed, and an attachment error can be hardly caused.

加えて、前記ニップル類と同様に、第１分割半体及び第２分割半体を射出成形等により作製する際に、それと同時に、従来のブロー成形による製造方法では付設困難であったセパレータ等の消波手段を、一体に成形することもできる。また、レーザー溶着前に、第１分割半体及び第２分割半体の内面に、耐燃料透過性を持つバリヤー材料を塗工、コーティングすること、フロート型の消波手段を配備すること等もできる。   In addition, when the first divided half and the second divided half are produced by injection molding or the like, as in the case of the nipples, at the same time, separators and the like that are difficult to be attached by the conventional blow molding production method. The wave-dissipating means can be integrally formed. In addition, before laser welding, it is possible to coat and coat a barrier material having fuel permeation resistance on the inner surfaces of the first and second divided halves, and to provide a float type wave-absorbing means. it can.

以下、本発明の合成樹脂製液体タンクの製造方法の実施形態を図面を参照しながら説明する。   Hereinafter, an embodiment of a method for producing a synthetic resin liquid tank of the present invention will be described with reference to the drawings.

図１は、本発明に係る合成樹脂製液体タンクの製造方法の一実施形態により製造される合成樹脂製液体タンクとしての、小型空冷２サイクルガソリンエンジン等の内燃エンジン用燃料タンク１０を示している。   FIG. 1 shows a fuel tank 10 for an internal combustion engine such as a small air-cooled two-cycle gasoline engine as a synthetic resin liquid tank manufactured by an embodiment of a method for manufacturing a synthetic resin liquid tank according to the present invention. .

本実施形態の製造方法では、まず、片面が開口した容器ないし蓋状の第１分割半体１１と第２分割半体１２とを射出成形により作製する。この場合、前記第１分割半体は、材料として、熱可塑性及び耐燃料（例えば、潤滑油混合ガソリン）透過性を持つとともに、レーザー光透過性を持つ透過性合成樹脂、例えば、ポリエチレン（ＰＥ）、ナイロン（ＰＡ）、ポリアセタール（ＰＯＭ）、ポリブチレンテレフタレート（ＰＢＴ）等を用い、前記第２分割半体は、材料として、熱可塑性及び耐燃料透過性を持つとともに、レーザー光吸収性を持つ吸収性合成樹脂、例えば、カーボンを配合したポリエチレン（ＰＥ）、ナイロン（ＰＡ）、ポリアセタール（ＰＯＭ）、ポリブチレンテレフタレート（ＰＢＴ）等を用い、それら第１分割半体１１及び第２分割半体１２の開口部全周には、接合面部となる所定幅の合わせ面部１３、１４を形成する鍔状部１１ａ、１２ａを設ける。   In the manufacturing method of the present embodiment, first, a container or a lid-shaped first divided half body 11 and a second divided half body 12 that are open on one side are produced by injection molding. In this case, the first divided half has a thermoplastic and fuel-resistant (for example, lubricating oil mixed gasoline) permeability as a material, and a transparent synthetic resin having a laser light permeability, such as polyethylene (PE). , Nylon (PA), polyacetal (POM), polybutylene terephthalate (PBT), etc., and the second half is made of a material that is thermoplastic and fuel-permeable and absorbs laser light. Synthetic resin, for example, polyethylene (PE), nylon (PA), polyacetal (POM), polybutylene terephthalate (PBT), etc. blended with carbon, and the first divided half 11 and the second divided half 12 On the entire periphery of the opening, hook-shaped portions 11a and 12a that form mating surface portions 13 and 14 having a predetermined width to be a joint surface portion are provided.

また、前記第１分割半体１１には、その凸状部分１１ｃに、図示しない内燃エンジン（気化器）に燃料を供給するための、供給ホース４１及び先端部にストレーナ２２が取り付けられる吸込ホース２１（タンク内）が接続されるニップル１６、燃料戻し外側ホース４２及び戻し内側ホース２３（タンク内）が接続されるニップル１７、及び、外側にブリーザ４３が接続ホース４４を介して取り付けられるニップル１８が、それぞれ内外に突出した状態で、前記射出成形時に本体部分と同時にかつ一体に成形され、また、前記凸状部分１１ｃ以外の所定部位にも、キャップ４５が螺合蓋着される雄ねじ部２６付き燃料注入口２５が、前記射出成形時に本体部分と同時に、かつ、一体に成形される。   The first divided half body 11 has a supply hose 21 for supplying fuel to an internal combustion engine (a carburetor) (not shown) and a strainer 22 attached to the distal end portion of the convex portion 11c. A nipple 16 to which (inside the tank) is connected, a nipple 17 to which the fuel return outer hose 42 and the return inner hose 23 (inside the tank) are connected, and a nipple 18 to which a breather 43 is attached to the outside via a connection hose 44. In addition, a male threaded portion 26 is provided which is molded integrally with the main body portion at the time of injection molding in a state of projecting inward and outward, and a cap 45 is screwed onto a predetermined portion other than the convex portion 11c. The fuel injection port 25 is molded at the same time as and integrally with the main body during the injection molding.

前記第１分割半体１１と第２分割半体１２とを射出成形により作製した後には、前記ストレーナ２２を前記吸込ホース２１に取り付けるとともに、該吸込ホース２１及び前記戻し内側ホース２３を前記ニップル１６の内側部に取付接続しておき、次いで、前記合わせ面部１３、１４同士を対接させた状態で、レーザー発生装置３０からレーザー光Ｌを前記第１分割半体１１の鍔状部１１ａを介して前記合わせ面部１３、１４に照射（全周照射）する。これにより、前記両合わせ面部１３、１４が熱溶融して接合（溶着）される（線状に溶着部１５が形成される）。   After the first divided half 11 and the second divided half 12 are produced by injection molding, the strainer 22 is attached to the suction hose 21 and the suction hose 21 and the return inner hose 23 are connected to the nipple 16. In the state where the mating surface portions 13 and 14 are in contact with each other, the laser beam L is emitted from the laser generator 30 via the flange-shaped portion 11a of the first divided half body 11. The mating surface portions 13 and 14 are irradiated (irradiated all around). Thus, the mating surface portions 13 and 14 are thermally melted and joined (welded) (the welded portion 15 is formed in a linear shape).

このように、本実施形態の製造方法では、得るべきタンク１０を、予め成形された二つの部材（第１分割半体１１と第２分割半体１２）に分割して作製し、それらの合わせ面部１３、１４をレーザー溶着により接合するようにされるので、前記第１分割半体１１と前記第２分割半体１２とを射出成形等で別々に作製することが可能となり、そのため、前記第１分割半体１１と前記第２分割半体１２とを異なる合成樹脂材料で作製することができる。これにより、例えば、タンク取付設置のために下半分（第２分割半体１２）の強度を、さほど強度を必要としない上半分（第１分割半体１１）より上げたり、下半分を形成する第２分割半体１２を透明材料で作製して残量計の機能を持たせたり、第１分割半体１１と第２分割半体１２とを色違い材料で作製して意匠性、美観を向上させること等が可能となり、設計自由度、品質、機能、及び意匠性等を格段に向上させることができる。   As described above, in the manufacturing method of the present embodiment, the tank 10 to be obtained is divided into two members (the first divided half body 11 and the second divided half body 12) that are formed in advance, and their alignment is performed. Since the surface portions 13 and 14 are joined by laser welding, the first divided half body 11 and the second divided half body 12 can be separately manufactured by injection molding or the like. The one-half half body 11 and the second half-half body 12 can be made of different synthetic resin materials. Thereby, for example, the strength of the lower half (second divided half body 12) is set higher than the upper half (first divided half body 11) which does not require much strength for tank installation and installation, or the lower half is formed. The second divided half body 12 is made of a transparent material to have a fuel gauge function, or the first divided half body 11 and the second divided half body 12 are made of different color materials for design and aesthetics. It becomes possible to improve the degree of freedom of design, quality, function, design, and the like.

また、第１分割半体１１及び第２分割半体１２を射出成形等により作製する際に、ニップル１６、１７、１８をそれと同時に一体に成形することができるので、インサート成形やグロメット等が不要となり、従来のブロー成形による製造方法に比して、部品点数、工数を削減できるとともに、液漏れ等の不都合も防止できる。   Further, when the first divided half body 11 and the second divided half body 12 are produced by injection molding or the like, the nipples 16, 17 and 18 can be integrally molded at the same time, so insert molding or grommet is not required. Thus, the number of parts and man-hours can be reduced and inconveniences such as liquid leakage can be prevented as compared with a conventional blow molding method.

さらに、吸込ホース２１やストレーナ２２等は、レーザ溶着前の、片面が開口した容器ないし蓋状の第１分割半体１１及び第２分割半体１２に取付配備すればよいので、従来のブロー成形による製造方法に比して、それらの取り付け作業が極めて簡単容易となり、製造コストを大幅に抑えることができるとともに、取り付けミスを生じにくくできる。   Further, the suction hose 21, the strainer 22, and the like may be attached to the container or the lid-shaped first divided half body 11 and the second divided half body 12 which are open on one side before laser welding, so that the conventional blow molding is performed. As compared with the manufacturing method according to the above, the attaching operation thereof becomes extremely simple and easy, the manufacturing cost can be greatly suppressed, and an attachment error can be hardly caused.

加えて、前記ニップル１６、１７、１８と同様に、第１分割半体１１及び第２分割半体１２を射出成形等により作製する際に、それと同時に、従来のブロー成形による製造方法では付設困難であったセパレータ等の消波手段を、一体に成形することもできる。また、レーザー溶着前に、第１分割半体１１及び第２分割半体１２の内面に、耐燃料透過性を持つバリヤー材料等を塗工、コーティングすること、フロート型の消波手段を配備すること等もできる。   In addition, as with the nipples 16, 17, and 18, when the first divided half 11 and the second divided half 12 are produced by injection molding or the like, at the same time, it is difficult to attach them by the conventional blow molding production method. The wave-absorbing means such as the separator can be formed integrally. Further, before the laser welding, a barrier material having fuel permeability is applied to the inner surfaces of the first divided half 11 and the second divided half 12, and a float type wave-absorbing means is provided. You can also.

なお、前記実施形態では、前記第１分割半体１１をレーザー光透過性を持つ透過性合成樹脂で作製するとともに、前記第２分割半体１２をレーザー光吸収性を持つ吸収性合成樹脂で作製し、レーザー光Ｌを前記第１分割半体１１（の鍔状部１１ａ）を介して前記合わせ面部１３、１４に照射するようにされているが、それに代えて、前記第１分割半体１１をレーザー光透過性を有する透過性合成樹脂で作製するとともに、前記合わせ面部１３、１４間にレーザー光吸収性を有する適宜のシート状吸収材を介在させ、レーザー光Ｌを前記第１分割半体１１の鍔状部１１ａを介して前記合わせ面部１３、１４間に照射して両者を溶着するようにしてもよい。   In the embodiment, the first divided half 11 is made of a transparent synthetic resin having a laser light transmission property, and the second divided half body 12 is made of an absorbent synthetic resin having a laser light absorption property. In addition, the laser beam L is applied to the mating surface portions 13 and 14 via the first divided half 11 (the saddle-shaped portion 11a), but instead, the first divided half 11 Is made of a transparent synthetic resin having a laser beam transmission property, and an appropriate sheet-like absorbent material having a laser beam absorption property is interposed between the mating surface portions 13 and 14, so that the laser beam L is emitted from the first divided half body. 11 may be irradiated between the mating surface portions 13 and 14 through 11 flange portions 11a.

この様にせしめれば、各分割半体の材質選択の自由度が更に向上し、好適である。   This is preferable because the degree of freedom in selecting the material of each divided half is further improved.

本発明に係る合成樹脂製液体タンクの製造方法の一実施形態により製造される合成樹脂製液体タンクとしての内燃エンジン用燃料タンクを示す断面図。Sectional drawing which shows the fuel tank for internal combustion engines as a synthetic resin liquid tank manufactured by one Embodiment of the manufacturing method of the synthetic resin liquid tank which concerns on this invention.

符号の説明Explanation of symbols

１０ 燃料タンク（合成樹脂製液体タンク）
１１ 第１分割半体
１２ 第２分割半体
１１ａ、１２ａ 鍔状部
１３、１４ 合わせ面部
１５ 溶着部
１６，１７，１８ ニップル
２０ 吸収材
２１ 吸込ホース
２２ ストレーナ
２３ 戻し内側ホース
Ｌ レーザー光 10 Fuel tank (synthetic resin liquid tank)
DESCRIPTION OF SYMBOLS 11 1st division | segmentation half 12 2nd division | segmentation half 11a, 12a Gutter-like part 13, 14 Mating surface part 15 Welding part 16, 17, 18 Nipple 20 Absorbent material 21 Suction hose 22 Strainer 23 Return inner hose L Laser beam

Claims (12)

得るべき合成樹脂製液体タンク（１０）を構成する、相互に対接する合わせ面部（１３、１４）を有する片面が開口した容器ないし蓋状の第１分割半体（１１）と第２分割半体（１２）とを用意し、前記合わせ面部（１３、１４）同士を対接させた状態で該合わせ面部（１３、１４）にレーザー光（Ｌ）を照射して溶着することを特徴とする合成樹脂製液体タンクの製造方法。   A container or lid-shaped first divided half (11) and second divided half that are open on one side and have mating surfaces (13, 14) that make up the synthetic resin liquid tank (10) to be obtained. (12) is prepared, and welding is performed by irradiating the mating surface portions (13, 14) with laser light (L) in a state where the mating surface portions (13, 14) are in contact with each other. Manufacturing method of resin liquid tank. 前記第１分割半体（１１）をレーザー光透過性を持つ透過性合成樹脂で作製するとともに、前記第２分割半体（１２）をレーザー光吸収性を持つ吸収性合成樹脂で作製し、レーザー光（Ｌ）を前記第１分割半体（１１）を介して前記合わせ面部（１３、１４）に照射することを特徴とする請求項１に記載の合成樹脂製液体タンクの製造方法。   The first divided half (11) is made of a transparent synthetic resin having a laser beam transparency, and the second divided half (12) is made of an absorbent synthetic resin having a laser beam absorption, and laser 2. The method for producing a synthetic resin liquid tank according to claim 1, wherein light (L) is applied to the mating surface portions (13, 14) through the first divided half (11). 前記第１分割半体（１１）をレーザー光透過性を有する透過性合成樹脂で作製するとともに、前記合わせ面部（１３、１４）間にレーザー光吸収性を有する吸収材（２０）を介在させ、レーザー光（Ｌ）を前記第１分割半体（１１）を介して前記合わせ面部（１３，１４）間に照射することを特徴とする請求項１に記載の合成樹脂製液体タンクの製造方法。   The first divided half (11) is made of a transparent synthetic resin having a laser beam transparency, and an absorbent material (20) having a laser beam absorption property is interposed between the mating surface portions (13, 14). The method for producing a synthetic resin liquid tank according to claim 1, wherein the laser beam (L) is irradiated between the mating surface portions (13, 14) via the first divided half (11). 前記第１分割半体（１１）及び第２分割半体（１２）に、それぞれ前記合わせ面部（１３、１４）を形成する鍔状部（１１ａ、１２ａ）を設けることを特徴とする請求項１から３のいずれか一項に記載の合成樹脂製液体タンクの製造方法。   The said 1st division | segmentation half (11) and the 2nd division | segmentation half (12) are provided with the hook-shaped part (11a, 12a) which forms the said mating surface part (13, 14), respectively. To 4. The method for producing a synthetic resin liquid tank according to any one of claims 1 to 3. 前記第１分割半体（１１）及び／又は第２分割半体（１２）に、ニップル類（１６、１７、１８）を一体に成形することを特徴とする請求項１から４のいずれか一項に記載の合成樹脂製液体タンクの製造方法。   The nipples (16, 17, 18) are formed integrally with the first divided half (11) and / or the second divided half (12), respectively. The manufacturing method of the synthetic resin liquid tank as described in a term. 得るべき合成樹脂製液体タンク（１０）内に配在すべき、ホース類（２１、２３）やストレーナ（２２）等を、前記合わせ面部（１３、１４）のレーザー溶着前に前記第１分割半体（１１）及び／又は第２分割半体（１２）に取り付けておくことを特徴とする請求項１から５のいずれか一項に記載の合成樹脂製液体タンクの製造方法。   The hose (21, 23), strainer (22), etc., which should be placed in the synthetic resin liquid tank (10) to be obtained, are placed in the first divided half before the laser welding of the mating surface (13, 14). The method for producing a synthetic resin liquid tank according to any one of claims 1 to 5, characterized in that the synthetic resin liquid tank is attached to the body (11) and / or the second divided half (12). 前記第１分割半体（１１）及び第２分割半体（１２）は、射出成形又は熱プレス成形により作製することを特徴とする請求項１から６のいずれか一項に記載の合成樹脂製液体タンクの製造方法。   The said 1st division | segmentation half body (11) and the 2nd division | segmentation half body (12) are produced by injection molding or hot press molding, The synthetic resin products as described in any one of Claim 1 to 6 characterized by the above-mentioned. A method for manufacturing a liquid tank. 相互に対接する合わせ面部（１３，１４）を有する片面が開口した容器ないし蓋状の第１分割半体（１１）と第２分割半体（１２）とからなり、前記第１分割半体（１１）がレーザー光透過性を持つ透過性合成樹脂で作製されるとともに、前記第２分割半体（１２）がレーザー光吸収性を持つ吸収性合成樹脂で作製され、前記合わせ面部（１３、１４）同士がレーザー光（Ｌ）で溶着されていることを特徴とする合成樹脂製液体タンク。   A container or lid-shaped first divided half (11) and a second divided half (12) each having a mating surface portion (13, 14) that contact each other are opened. 11) is made of a transparent synthetic resin having a laser beam transparency, and the second divided half (12) is made of an absorbent synthetic resin having a laser beam absorption property, and the mating surface portions (13, 14). ) Are welded with laser light (L), and a synthetic resin liquid tank. 相互に対接する合わせ面部を有する片面が開口した容器状の第１分割半体（１１）と第２分割半体（１２）とからなり、前記第１分割半体（１１）がレーザー光透過性を持つ透過性合成樹脂で作製されるとともに、前記合わせ面部（１３、１４）間にレーザー光吸収性を有する吸収材（２０）が介在せしめられ、前記合わせ面部（１３、１４）同士がレーザー光（Ｌ）で溶着されていることを特徴とする合成樹脂製液体タンク。   It consists of a container-shaped first divided half (11) and a second divided half (12) having one side having mating surface portions that contact each other, and the first divided half (11) is transparent to laser light. And an absorbent material (20) having a laser light absorption property is interposed between the mating surface portions (13, 14), and the mating surface portions (13, 14) are laser beams. A synthetic resin liquid tank which is welded in (L). 前記第１分割半体（１１）及び第２分割半体（１２）に、それぞれ前記合わせ面部（１３、１４）を形成する鍔状部（１１ａ、１２ａ）が設けられていることを特徴とする請求項８又は９に記載の合成樹脂製液体タンク。   The first divided half (11) and the second divided half (12) are provided with hook-shaped portions (11a, 12a) for forming the mating surface portions (13, 14), respectively. The synthetic resin liquid tank according to claim 8 or 9. 前記第１分割半体（１１）及び／又は第２分割半体（１２）に、ニップル類（１６、１７、１８）が一体に成形されていることを特徴とする請求項８から１０のいずれか一項に記載の合成樹脂製液体タンク。   11. The nipples (16, 17, 18) are formed integrally with the first divided half (11) and / or the second divided half (12), respectively. A synthetic resin liquid tank according to claim 1. 前記第１分割半体（１１）がタンク（１０）の上半分を、前記第２分割半体（１２）がタンク（１０）の下半分を形成し、前記ニップル類（１６、１７，１８）が前記第１分割半体（１１）に設けられていることを特徴とする請求項１１に記載の合成樹脂製液体タンク。   The first divided half (11) forms the upper half of the tank (10), the second divided half (12) forms the lower half of the tank (10), and the nipples (16, 17, 18). The synthetic resin liquid tank according to claim 11, wherein is provided in the first divided half body (11).
JP2005010726A 2005-01-18 2005-01-18 Liquid tank made of synthetic resin and its manufacturing method Pending JP2006198810A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008238900A (en) * 2007-03-27 2008-10-09 Honda Motor Co Ltd Fuel tank of motorcycle
CN101687463A (en) * 2007-06-22 2010-03-31 考特克斯·特克斯罗恩有限公司及两合公司 Fuel tank
JP2016101894A (en) * 2014-11-28 2016-06-02 トヨタ自動車株式会社 Manufacturing method of fuel tank
WO2017199938A1 (en) * 2016-05-18 2017-11-23 西遠ゴム工業株式会社 Grommet and method of manufacturing same, wire harness with grommet and method of manufacturing same, and set of parts for assembling grommet
FR3137318A1 (en) * 2022-06-30 2024-01-05 Hitachi Astemo France HOUSING ASSEMBLED BY DISCONTINUOUS LASER WELDING

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008238900A (en) * 2007-03-27 2008-10-09 Honda Motor Co Ltd Fuel tank of motorcycle
CN101687463A (en) * 2007-06-22 2010-03-31 考特克斯·特克斯罗恩有限公司及两合公司 Fuel tank
JP2010530825A (en) * 2007-06-22 2010-09-16 カウテックス テクストロン ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト Fuel tank
US8678226B2 (en) 2007-06-22 2014-03-25 Kautex Textron Gmbh & Co. Kg Fuel container
JP2016101894A (en) * 2014-11-28 2016-06-02 トヨタ自動車株式会社 Manufacturing method of fuel tank
WO2017199938A1 (en) * 2016-05-18 2017-11-23 西遠ゴム工業株式会社 Grommet and method of manufacturing same, wire harness with grommet and method of manufacturing same, and set of parts for assembling grommet
FR3137318A1 (en) * 2022-06-30 2024-01-05 Hitachi Astemo France HOUSING ASSEMBLED BY DISCONTINUOUS LASER WELDING

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