JPH05215025A - 樹脂製吸気管の製造方法 - Google Patents

樹脂製吸気管の製造方法

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Publication number
JPH05215025A
JPH05215025A JP4020172A JP2017292A JPH05215025A JP H05215025 A JPH05215025 A JP H05215025A JP 4020172 A JP4020172 A JP 4020172A JP 2017292 A JP2017292 A JP 2017292A JP H05215025 A JPH05215025 A JP H05215025A
Authority
JP
Japan
Prior art keywords
intake
inner pipe
molding
pipe
main body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4020172A
Other languages
English (en)
Other versions
JP3384492B2 (ja
Inventor
Tatsuhiko Mukawa
達彦 務川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Subaru Corp
Original Assignee
Fuji Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Heavy Industries Ltd filed Critical Fuji Heavy Industries Ltd
Priority to JP02017292A priority Critical patent/JP3384492B2/ja
Priority to US07/998,735 priority patent/US5243933A/en
Priority to GB9302125A priority patent/GB2264450B/en
Priority to DE4303032A priority patent/DE4303032A1/de
Publication of JPH05215025A publication Critical patent/JPH05215025A/ja
Application granted granted Critical
Publication of JP3384492B2 publication Critical patent/JP3384492B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/112—Intake manifolds for engines with cylinders all in one line
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14598—Coating tubular articles
    • B29C45/14622—Lining the inner or outer surface of 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14836—Preventing damage of inserts during injection, e.g. collapse of hollow inserts, breakage
    • 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
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot 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
    • 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
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
    • B29C66/53245—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow
    • B29C66/53246—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers
    • B29C66/53247—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers said spouts comprising flanges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10334—Foams; Fabrics; Porous media; Laminates; Ceramics; Coatings
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B29C2045/1445—Coating a portion of the article, e.g. the edge of the article injecting a part onto a blow moulded object
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/749—Motors
    • 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
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/749—Motors
    • B29L2031/7492—Intake manifold
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10347—Moulding, casting or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

(57)【要約】 【目的】 製造および取扱いが容易で、組付け後も剛性
を充分に保証して吸気騒音の低減を図ることができるよ
うにする。 【構成】 吸気管本体１の内管部２をブロー成形にて一
体形成し、次いでこの内管部２の吸気ダクト１ａと吸気
チャンバ１ｂとを支柱４で固定し、その後この内管部２
をインサートし、この内管部２の外周に外皮部３を射出
形成する。上記内管部２の比較的容積の大きい吸気ダク
ト１ａと吸気チャンバ１ｂとが支柱４で固定されている
ので、射出成形の際に内管部２が成形圧で変形すること
がなく、成形が容易である。また、吸気管本体１をエン
ジンに組付け後も吸気管本体１全体が上記支柱４にて支
持されているので吸気管負圧の影響を受けて変形するこ
とがなく、吸気騒音の低減を図ることができる。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、自動車などの車輌に用
いられる樹脂製吸気管の製造方法に関する。
【０００２】
【従来の技術】一般にスロットルバルブ下流に接続する
吸気管は、吸気ダクト、吸気チャンバ、およびインテー
クマニホルドで構成されている。
【０００３】従来、これらの各構成部品は分割成形し、
後工程で一体に組付けられる。樹脂製吸気管の場合、強
度などが要求されない箇所はブロー成形にて形成し、フ
ランジなどの肉厚部分は射出成形にて部分的に形成し、
後工程で上記ブロー成形品と射出成形品とを溶着してい
た。また、屈曲部分の比較的多いインテークマニホルド
は、ビスマス合金などの低融点金属材を中子として用
い、この中子は射出成形後に融解して取出すようにして
いる。
【０００４】このように、ブロー成形では任意の形状を
得ることはできるが、フランジあるいは外部取付けのた
めのブラケットなどを一体に形成することができないた
め、本体を外部に取付ける際の固定手段に問題がある。
また、ブロー成形品にフランジあるいはブラケットを後
溶着するものでは、溶着部分の強度的信頼性などを考慮
して溶着面を広く確保する必要があり、不必要なスペー
ス増となる。
【０００５】一方、インテークマニホルドの成形などの
ように低融点合金を中子として用いれば、フランジ、ブ
ラケットを一体的に形成することはできるが、この低融
点合金が高価であるため製品のコストアップを招き、さ
らに、中子を成形するための設備を別途必要とするため
設備費が嵩むばかりか生産性の著しい低下を招く。
【０００６】この対策として、例えば特開昭６３−１１
１０３１号公報、特開昭６３−１４１７１３号公報に
は、まずブロー成形で内管部を形成し、この内管部を中
子として、その外周に外皮部を射出成形する技術が開示
されている。
【０００７】
【発明が解決しようとする課題】この先行技術のように
ブロー成形品を中子として用いる場合、射出成形の際の
成形圧により上記ブロー成形品が変形する虞があるた
め、このブロー成形品に非圧縮体（砂、ガラスビーズ、
水などの液体）を充填しなければならない。
【０００８】しかし、ブロー成形品に非圧縮体を封入す
る作業は手間がかかり取扱いが煩雑なばかりか、射出成
形完了後にこの非圧縮体を加熱して取出さなければなら
ず作業工程の増加を招く。
【０００９】さらに、上記ブロー成形品に非圧縮体を充
填すると重量増となり、射出成形型にインサートする際
に正確な位置に保持固定することが難しくなる。したが
って、スロットルバルブ下流側の吸気系全体を一体的に
成形することは困難で、上述した先行技術に開示されて
いるように、吸気ダクトあるいはインテークマニホルド
など部分的な成形のみでしか実現することができず、各
構成部品間の接続作業が別途必要で工数増に繋がり、さ
らに、接続部分の強度的保証も充分に考慮しなければな
らない。
【００１０】また、上記ブロー成形品は剛性が低く、こ
のブロー成形品を内管部とする吸気管本体をエンジンの
吸気系に組付けた場合、吸気管圧力変動で上記内管部が
弾性変形して表面振動を誘発し、吸気騒音の増加を招く
問題がある。
【００１１】本発明は、上記事情に鑑みてなされたもの
で、簡単な構造で、部品点数および組立て工数の削減を
図ることができるとともに、製造および取扱いが容易
で、しかも、組付け後も剛性を充分に保証して吸気騒音
の低減を図ることのできる樹脂製吸気管の製造方法を提
供することを目的としている。
【００１２】
【課題を解決するための手段】上記目的を達成するた
め、本発明による樹脂製吸気管の製造方法は、吸気ダク
トとこの吸気ダクトの下流側に連設する吸気チャンバと
この吸気チャンバの下流側に連設するインテークマニホ
ルドとからなる吸気管本体の内管部をブロー成形にて一
体形成し、次いでこの内管部の少なくとも上記吸気チャ
ンバと上記吸気ダクトとを支持部材で固定し、その後こ
の内管部を成形型のキャビティにインサートし、この成
形型に樹脂材を射出して上記内管部の外周に外皮部を形
成するものである。
【００１３】
【作 用】本発明によれば、ブロー成形した内管部の少
なくとも上記吸気チャンバと上記吸気ダクトとを支持部
材で固定するので、この内管部をそのまま射出成形型に
インサートした場合でも、強度的に比較的弱い吸気チャ
ンバと上記吸気ダクトとが成形圧で変形することがな
い。したがって、射出成形の際に上記内管部に非圧縮体
を充填する必要がなく、その分軽量であるためインサー
ト時の位置固定が容易となり、吸気管全体を一体的に射
出成形することができる。
【００１４】また、上記支持部材により上記内管部の剛
性を高めることができるため、エンジン稼働時の吸気管
負圧を受けても弾性変形することなく吸気騒音を低減す
ることができる。
【００１５】
【実施例】以下、図面に基づいて本発明の実施例を説明
する。
【００１６】図面は本発明の一実施例を示し、図１は図
２のＩ−Ｉ断面図、図２は吸気管本体の平面図、図３は
図２の側面図、図４は内管部の平面図、図５は図４のＶ
−Ｖ断面図、図６は成形型の断面図、図７は支柱の固定
手順を示す断面図、図８は支柱の別の態様を示す断面
図、図９は支柱の他の態様を示す断面図である。
【００１７】図中の符号１は吸気管本体で、内管部２と
この内管部２の外周を囲繞する外皮部３との二層構造を
なし、図１の右手から図示しないスロットルバルブ下流
側に接続する吸気ダクト１ａ、この吸気ダクト１ａに連
通する吸気チャンバ１ｂ、この吸気チャンバ１ｂの下流
側に連通するインテークマニホルド１ｃで構成され、こ
の各構成部品が一体に形成されている。
【００１８】また、上記内管部２のうち比較的容積の大
きい部分、すなわち、強度的に弱い部分である上記吸気
ダクト１ａと吸気チャンバ１ｂに支柱４が介装されてい
る。この支柱４は樹脂製で、その両端が上記内管部２に
穿設した孔２ａに挿通され、熱変形させて頭部４ａを形
成するとと同時に、この頭部４ａの首下部分を上記内管
部２に溶着してカシメている。さらに、外皮部３の上記
吸気ダクト１ａの流入口と上記インテークマニホルド１
ｃの流出口にフランジ１ｄ，１ｅがそれぞれ形成されて
いる。
【００１９】また、この外皮部３の所定箇所に吸気管固
定用孔１ｆが穿設され、さらに、上記外皮部３の上記吸
気チャンバ１ｂの側面に周辺機器固定用ボス１ｇが一体
形成されている。またこの外皮部３の側部に長手方向に
沿ってリブ１ｈが一体形成されている。
【００２０】上記内管部２は熱可塑性樹脂製で、ブロー
成形により形成されている。また、上記外皮部３は図６
に示す成形型５のキャビティ５ａにて射出成形されたも
のである。
【００２１】（作 用）次に、上記構成による吸気管本
体１の製造手順を説明する。
【００２２】まず、熱塑性樹脂製内管部２をブロー成形
により形成する。次いで、この内管部２の吸気チャンバ
１ｂと吸気ダクト１ａの予め設定した対向面に孔２ａを
穿設し、この孔２ａに樹脂製支柱４を挿通する。そし
て、この支柱４の両端を上記孔２ａから突出させ、この
端部に頭部４ａを形成する。図７に示すように、この頭
部４ａはカシメ工具７により熱あるいは超音波などを印
加して変形させたもので、変形と同時に、この支柱４の
頭部４ａの首下部分を上記内管部２に溶着する。
【００２３】その後、上記内管部２を成形型５のキャビ
ティ５ａにインサートして所定に位置決め固定した後、
型締めし、インジェクタ６から樹脂を射出する。このと
き、上記内管部２の強度の弱い部分が支柱４で補強され
ているので、成形圧を受けても変形し難く耐圧性がよ
い。したがって、従来のように上記内管部２に非圧縮体
を充填する必要がなく作業性がよい。
【００２４】そして、上記成形型５で上記内管部２の外
周に外皮部３を所定に射出成形したら、上記成形型５を
型開きして成形品を取出し、所定に仕上げて図２、図３
に示す吸気管本体１を得る。射出成形の際に中子として
用いる内管部２が軽量であるため、位置決め保持が容易
である。
【００２５】また、上記吸気管本体１をエンジンに組付
けた際、上記支柱４により内管部２の強度の弱い部分が
補強されているため製品全体の剛性が高くなり、吸気管
圧力変動に対する耐圧性が向上し表面振動が押えられ、
その結果、吸気騒音の低減が図れる。
【００２６】なお、図８に示すように、上記支柱４の両
端に上記内管部２の内壁面に当接するフランジ４ｂを形
成すれば、内管部２の剛性をより一層向上させることが
できる。また、図９に示すように上記支柱４を中空にす
れば、射出成形時の樹脂がこの中空部４ｃに流れ込み、
内管部２と外皮部３とを一体化して剛性を向上させるこ
とができる。
【００２７】
【発明の効果】以上、説明したように本発明によればブ
ロー成形した内管部の少なくとも上記吸気チャンバと上
記吸気ダクトとを支持部材で固定したので、この内管部
をそのまま射出成形型にインサートした場合でも、この
内管部のうち比較的強度の弱い吸気チャンバと吸気ダク
トとが成形圧で変形することがない。したがって、射出
成形の際に上記内管部に非圧縮体を充填する必要がなく
なり、その分、軽量となりインサート時の位置固定が容
易になる。その結果、吸気管全体を一体的に射出成形す
ることができ、簡単な構造で、部品点数および組立て工
数の削減を図ることができるとともに、製造および取扱
いが容易になる。
【００２８】また、上記支持部材により上記内管部の剛
性を高めたので、組付け後のエンジン稼働時の吸気管負
圧に対して弾性変形することがなく、その分、吸気騒音
の低減を図ることができる。
【図面の簡単な説明】
【図１】図２のＩ−Ｉ断面図
【図２】吸気管本体の平面図
【図３】図２の側面図
【図４】内管部の平面図
【図５】図４のＶ−Ｖ断面図
【図６】成形型の断面図
【図７】支柱の固定手順を示す断面図
【図８】支柱の別の態様を示す断面図
【図９】支柱の他の態様を示す断面図
【符号の説明】
１…吸気管本体 １ａ…吸気ダクト １ｂ…吸気チャンバ １ｃ…インテークマニホルド ２…内管部 ３…外皮部 ４…支持部材 ５…成形型 ５ａ…キャビティ

Claims (1)

    【特許請求の範囲】
  1. 【請求項１】 吸気ダクトとこの吸気ダクトの下流側に
    連設する吸気チャンバとこの吸気チャンバの下流側に連
    設するインテークマニホルドとからなる吸気管本体の内
    管部をブロー成形にて一体形成し、 次いでこの内管部の少なくとも上記吸気チャンバと上記
    吸気ダクトとを支持部材で固定し、 その後この内管部を成形型のキャビティにインサート
    し、 この成形型に樹脂材を射出して上記内管部の外周に外皮
    部を形成することを特徴とする樹脂製吸気管の製造方
    法。
JP02017292A 1992-02-05 1992-02-05 樹脂製吸気管の製造方法 Expired - Fee Related JP3384492B2 (ja)

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JP02017292A JP3384492B2 (ja) 1992-02-05 1992-02-05 樹脂製吸気管の製造方法
US07/998,735 US5243933A (en) 1992-02-05 1992-12-30 Plastic intake pipe and the method thereof
GB9302125A GB2264450B (en) 1992-02-05 1993-02-03 A plastic intake pipe and a method for forming same
DE4303032A DE4303032A1 (ja) 1992-02-05 1993-02-03

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Application Number Priority Date Filing Date Title
JP02017292A JP3384492B2 (ja) 1992-02-05 1992-02-05 樹脂製吸気管の製造方法

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JPH05215025A true JPH05215025A (ja) 1993-08-24
JP3384492B2 JP3384492B2 (ja) 2003-03-10

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JP (1) JP3384492B2 (ja)
DE (1) DE4303032A1 (ja)
GB (1) GB2264450B (ja)

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KR20040049083A (ko) * 2002-12-03 2004-06-11 현대자동차주식회사 가솔린 엔진의 흡기계
DE102008019577A1 (de) 2008-04-18 2009-10-22 Veritas Ag Einteiliges HT-LALU Rohr
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JP2017063631A (ja) * 2015-09-28 2017-04-06 株式会社クボタ 水田作業機
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KR100369192B1 (ko) * 2000-12-26 2003-01-24 현대자동차주식회사 열가소성 플라스틱 튜브 너트 조립장치
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KR20040049083A (ko) * 2002-12-03 2004-06-11 현대자동차주식회사 가솔린 엔진의 흡기계
DE102008019577A1 (de) 2008-04-18 2009-10-22 Veritas Ag Einteiliges HT-LALU Rohr
DE102011120347A1 (de) 2011-11-30 2013-06-06 Maik Hentschel "Ladeluftleitung mit Hitzeschutzsystem für Verbrennungskraftmaschinen"
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DE102012004622A1 (de) 2012-03-06 2013-09-12 Veritas Ag Verfahren und Vorrichtung zur Herstellung eines Hohlkörpers
JP2016113970A (ja) * 2014-12-16 2016-06-23 スズキ株式会社 エンジンの吸気装置
JP2017063631A (ja) * 2015-09-28 2017-04-06 株式会社クボタ 水田作業機
WO2019035538A1 (ko) * 2017-08-14 2019-02-21 (주) 중앙테크 중공 사출 성형품의 제조방법 및 이를 이용하여 제조된 중공 사출 성형품
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Also Published As

Publication number Publication date
DE4303032A1 (ja) 1993-08-12
JP3384492B2 (ja) 2003-03-10
US5243933A (en) 1993-09-14
GB2264450B (en) 1995-09-06
GB9302125D0 (en) 1993-03-24
GB2264450A (en) 1993-09-01

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