JPH0441970A - Intake manifold - Google Patents
Intake manifoldInfo
- Publication number
- JPH0441970A JPH0441970A JP14384090A JP14384090A JPH0441970A JP H0441970 A JPH0441970 A JP H0441970A JP 14384090 A JP14384090 A JP 14384090A JP 14384090 A JP14384090 A JP 14384090A JP H0441970 A JPH0441970 A JP H0441970A
- Authority
- JP
- Japan
- Prior art keywords
- intake manifold
- thermoplastic resin
- thermosetting resin
- nut
- molding
- 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.)
- Pending
Links
- 229920005989 resin Polymers 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 46
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 45
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 44
- 238000000465 moulding Methods 0.000 claims abstract description 24
- 230000002265 prevention Effects 0.000 claims description 4
- 238000002844 melting Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 10
- 230000008018 melting Effects 0.000 abstract description 10
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 10
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 230000003014 reinforcing effect Effects 0.000 abstract description 6
- 230000006698 induction Effects 0.000 description 10
- 239000000696 magnetic material Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 9
- 238000010079 rubber tapping Methods 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
-
- 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
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2017—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the article
-
- 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
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2021—Inserts characterised by the material or type
- B29C2049/2043—Inserts characterised by the material or type comprising threads, e.g. screws or nuts
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
(産業上の利用分野)
この発明は、自動車用内燃機関の吸気側に取り付けて、
前記内燃機関に空気もしくは混合気を送り込むのに利用
されるインテークマニホールドに関し、とくに熱硬化性
樹脂により成形された熱硬化性樹脂製のインテークマニ
ホールドに関するものである。
(従来の技術)
従来、自動車用内燃機関の吸気側に取付けて、前記内燃
機関に空気もしくは混合気を送り込むのに利用されるイ
ンテークマニホールドとしては。
吸気干渉をできるだけ避けうるように、点火順序などを
考慮して、形状を定めたものがあり、内燃機関の気筒数
に対応させた種々の形状のものがある(例えば、「新編
自動車工学便覧く第4編〉」昭和58年9月30日
社団法人自動車技術会発行の第1−25頁 図1−61
”吸気マニホールドの例”参照)。
この種のインテークマニホールドは、鉄鋼系の材料(例
えば、JIS SPC,STK、STKMなど)が多
く用いられてきたが、重量軽減の意味からアルミニウム
系の材料(例えば、JISAC,ADCなど)も用いら
れており、さらには熱硬化性樹脂(エポキシ樹脂など)
製のインテークマニホールドも開発されるようになって
いる。
このような熱硬化性樹脂製インテークマニホールドにお
いて、例えば、第1図に例示する形状の熱硬化性樹脂製
インテークマニホールド1において、コレクター等の補
機類を取付けるための補機類締結用のめねじ部を設ける
にあたっては、インテークマニホールド1の所要部位に
第4図にも示すようにボス部1aおよびボス部補強部1
bを設け、同じく第4図に示すように、このボス部1a
に、円筒形状をなしかつ外側にセルフタフピンク用おね
じ部10aを有すると共に内側に補機類締結用のめねじ
部10bを有するセルフタッピングねじ10を矢印A方
向にねじ込んでセルフタフピングにより固足し、これに
よって、ボス部1aに補機類締結用のめねし部10bを
設けるようにしていた。
(発明が解決しようとする課題)
しかしながら、このような従来の補機類締結用のめねじ
部10bを設けた熱硬化性樹脂製インテークマニホール
ド1では、前記補機類締結用のめねじ部10bを内側に
有すると共にセルフタッピング用おねじ部10aを外側
に有するセルフタッピングねじ10をボス部1aにねじ
込むことによって、インテークマニホールド1に補機類
締結用のめねじ部10bを設けるようにしていたため、
ボス部1aの内周面はセルフタッピング用おねじ部10
aによって局所的に切削ないしは塑性加工を受けること
となるので、内燃機関の振動等によって、セルフタッピ
ング用おねじ部10aがかみあうねじ結合部分で亀裂を
生じたり破壊をきたしたりするおそれがないとはいえず
、したがって補機類の締結構造としてはあまり好ましく
ないものであるという課題を有していた。
(発明の目的)
この発明は、このような従来の課題にかんがみてなされ
たもので、熱硬化性樹脂製インテークマニホールドにお
いて、コレクター等の補機類のねじ締結による取付けを
良好に行うことが可能である補機類取付は用の締結部分
を有する熱硬化性樹脂製のインテークマニホールドを提
供することを目的としている。(Industrial Application Field) This invention is installed on the intake side of an automobile internal combustion engine,
The present invention relates to an intake manifold used to feed air or an air-fuel mixture to the internal combustion engine, and particularly relates to an intake manifold made of a thermosetting resin. (Prior Art) Conventionally, an intake manifold is attached to the intake side of an automobile internal combustion engine and used to feed air or air-fuel mixture to the internal combustion engine. In order to avoid intake air interference as much as possible, some shapes are determined by considering the ignition order, etc., and others have various shapes that correspond to the number of cylinders in an internal combustion engine (for example, "New Automotive Engineering Handbook"). Part 4〉” September 30, 1982
Figure 1-61, page 1-25, published by the Society of Automotive Engineers of Japan.
(See “Intake Manifold Example”). For this type of intake manifold, steel-based materials (e.g., JIS SPC, STK, STKM, etc.) have often been used, but aluminum-based materials (e.g., JISAC, ADC, etc.) have also been used to reduce weight. and even thermosetting resins (epoxy resins, etc.)
Manufactured intake manifolds are also being developed. In such a thermosetting resin intake manifold, for example, in the thermosetting resin intake manifold 1 having the shape illustrated in FIG. 1, a female thread for fastening auxiliary equipment such as a collector is used. In providing the boss portion 1a and the boss portion reinforcing portion 1 at the required portions of the intake manifold 1, as shown in FIG.
b, and as shown in FIG. 4, this boss portion 1a
Then, a self-tapping screw 10, which has a cylindrical shape and has a self-tuffing pink male threaded part 10a on the outside and a female threaded part 10b for fastening auxiliary equipment on the inside, is screwed in the direction of arrow A and is secured by self-tuffing. In addition, by this, a female part 10b for fastening auxiliary equipment is provided on the boss part 1a. (Problem to be Solved by the Invention) However, in the conventional thermosetting resin intake manifold 1 provided with the female threaded portion 10b for fastening auxiliary equipment, the female threaded portion 10b for fastening auxiliary equipment is By screwing into the boss portion 1a the self-tapping screw 10 which has a self-tapping male thread portion 10a on the inside and a self-tapping male thread portion 10a on the outside, the intake manifold 1 is provided with a female thread portion 10b for fastening auxiliary equipment.
The inner peripheral surface of the boss portion 1a is a self-tapping male thread portion 10.
Since it is locally subjected to cutting or plastic working by a, there is no risk of cracking or destruction at the threaded connection part where the self-tapping male thread part 10a engages due to vibrations of the internal combustion engine, etc. Therefore, there was a problem in that it was not very desirable as a fastening structure for auxiliary machinery. (Purpose of the Invention) This invention was made in view of such conventional problems, and it is possible to successfully attach auxiliary equipment such as a collector by screwing to an intake manifold made of thermosetting resin. The purpose of the auxiliary equipment mounting is to provide an intake manifold made of thermosetting resin with a fastening part for use.
(課題を解決するための手段)
この発明に係わるインテークマニホールドは、熱硬化性
樹脂によるインテークマニホールドの成形時にインサー
ト成形により結合一体化された補機類締結用の熱可塑性
樹脂製ナツトをそなえた構成としたことを特徴としてお
り、このような熱硬化性樹脂製のインテークマニホール
ドの構成を前述した従来の課題を解決するための手段と
している。
この発明に係わる熱硬化性樹脂製インテークマニホール
ドにおいて、熱硬化性樹脂としては。
フェノール樹脂やエポキシ樹脂、その他、不飽和ポリエ
ステル樹脂にガラスウール等を混入したBMC(、<ル
クモールディングコンパウンド)などがあるが、特に限
定はされない。
また、この熱硬化性樹脂によるインテークマニホールド
の成形時にインサート成形により結合−体化される熱可
塑性樹脂製ナツトにおいて、熱可塑性樹脂としてはポリ
アミド(ナイロン)やポリプロピレンなどがあるが、こ
れもまた特に限定はされない。
そして、熱硬化性樹脂によるインテークマニホールドの
成形時に熱可塑性樹脂製す一/ トをインサートして成
形した後において、この熱可塑性樹脂製ナツトが熱硬化
性樹脂製インテークマニホールドから抜けるのを防止す
るために、熱可塑性樹脂製ナツトの一部分においてその
ねじ軸方向と交差する方向に突出してインサート成形後
にインテークマニホールドの熱硬化性樹脂部分で包まれ
る抜け防止用突起部をそなえたものとすることも必要に
応じて望ましい。
また、インテークマニホールドの中空部分に低融点金属
よりなる中子を設けた状態にして熱硬化性樹脂によるイ
ンテークマニホールドの成形を行い、その後前記低融点
金属よりなる中子を高周波誘導加熱によって溶融除去す
る工程を取る場合において、熱可塑性樹脂製ナツトの表
面部分に磁性体を含む被覆材を被覆しておき、この被覆
に際して例えば熱可塑性樹脂製ナツトの成形時において
型内塗装により前記磁性体を含む被覆材が熱可塑性樹脂
製ナツトの表面部分に被覆されるようにしておき、この
磁性体を含む被覆材が表面部分に被覆された熱可塑性樹
脂製ナツトをインテークマニホールド成形型の所要部位
に配設した状態にして、熱硬化性樹脂によりインテーク
マニホールドの成形を行って熱可塑性樹脂製ナツトがイ
ンサート成形により結合一体止されるようにすることも
必要に応じて望ましい。
この場合に、熱硬化性樹脂よりなるインテークマニホー
ルドと熱可塑性樹脂よりなるナツトとの境界部分には前
記磁性体が存在していることとなるので、インテークマ
ニホールドの成形後に前記低融点金属よりなる中子を高
周波誘導加熱によって溶融除去する際に、前記磁性体も
高周波誘導加熱によって発熱するため、熱可塑性樹脂よ
りなるナツトが適度に軟化することとなり、これによっ
て熱可塑性樹脂よりなるナツトと熱硬化性樹脂よりなる
インテークマニホールドとの間の結合をより強固なもの
にすることができるようになる。
(発明の作用)
この発明に係わるインテークマニホールドは、上述した
構成をなしているものであるから、熱硬化性樹脂製イン
テークマニホールドへの熱可塑性樹脂製ナツトの結合が
著しく堅固なものとなり、また、補機類を締結するナツ
トが熱可塑性樹脂により形成されているため前記ナツト
のめねじ部分に適度の伸びが生ずるものとなっているこ
とから、補機類に繰り返しの応力が加わったときでも前
記めねじ部分の適度の伸びにより亀裂や破壊が生じがた
いものとなり、熱硬化性樹脂製インテークマニホールド
への補機類の取付けが良好なものとなる。
(実施例)
第2図は第1図に例示した形状の熱硬化性樹脂製インテ
ークマニホールド1の成形直後の状態を示している。
第2図において、熱硬化性樹脂製インテークマニホール
ド1は、成形型2と低融点金属よりなる中子3を用いて
中空形状に成形され、コレクター等の補機類を取付ける
ために円筒形状のボス部1aおよびボス部補強部1bを
有するものとなっている。
そして、このボス部1aおよびボス部補強部1bに対応
する部分の成形型2にはボス部およびボス部補強部成形
用凹部2aが設けであると共に、このボス部およびボス
部補強部成形用四部2aには、あらかじめ成形した熱可
塑性樹脂製ナツト4の内周側のめねじ部4aの部分を嵌
挿するだめの突出部2bを設けたものとなっている。
このような成形型2および低融点金属よりなる中子3を
用いて熱硬化性樹脂よりなるインテークマニホールド1
を成形するに際しては、まず、熱可塑性樹脂により一端
が閉塞した筒状に成形されて内周部分にめねじ部4aを
有し且つ閉塞側の端部にその外周方向(すなわち、ねじ
軸と直交する方向)に突出する抜け防止用突起部4bを
有すると共に熱可塑性樹脂の成形時に型内塗装によって
外表面に磁性体を含む被覆材5を被覆した熱可塑性樹脂
製ナツト4を製作し、次いで、この熱可塑性樹脂製ナツ
ト4を成形型2のボス部およびボス部補強部成形用四部
2aに設けた突出部2bに嵌合したのち、この成形型2
と低融点金属よりなる中子3とを組み合わせてインテー
クマニホールド成形空間を形成し、続いて熱硬化性樹脂
を射出してインテークマニホールドの形状に成形すると
共に前記熱可塑性樹脂製ナツト4をインサート成形する
ことにより、前記熱可塑性樹脂製ナツト4をインサート
成形により結合一体止した熱硬化性樹脂製インテークマ
ニホールド射出成形体を得る。
次いで、このインテークマニホールド射出成形体を第3
図に示すオイルバス11中に浸漬する。
この第3図に示すオイルバス11は、オイル容器12の
外側にヒータ13を有し、内部に高周波誘導加熱コイル
14を設けていると共にオイル15を収容してなるもの
であって、前記インテークマニホールド射出成形体をク
ランプ装置16によりクランプした状態でオイル15中
に浸漬して高周波誘導加熱コイル14の中に位置させ、
この高周波誘導コイル14による高周波誘導加熱によっ
て低融点金属よりなる中子3を溶解する。このとき、溶
解した低融点金属3′はオイル容器12の底部にたまっ
た状態となる。
また、この高周波誘導加熱の際に、前記熱可塑性樹脂製
ナツト4の表面に塗布されてインテークマニホールド射
出成形体の成形後にこのインテークマニホールド射出成
形体のボス部(1a)によって取り囲まれた磁性体を含
む被覆材5中の前記磁性体が高周波誘導加熱によって発
熱し、熱可塑性樹脂製ナツト4が加熱されて適度に軟化
することによって、熱硬化性樹脂よりなるインテークマ
ニホールド1との結合がより強固なものとなるこの実施
例により製作した熱硬化性樹脂製インテークマニホール
ド1は、そのボス部1aに熱可塑性樹脂製ナツト4をイ
ンサート成形により一体でそなえたものとなっているの
で、熱可塑性樹脂製ナツト4の固定が十分強固に行われ
るようになり、従来のセルフタッピングねじ10のセル
フタッピング用おねじ部10aをねじ込むことによりめ
ねじ部tabを設ける場合のような前記セルフタフピン
グ用おねじ部10aのねじ込みによる亀裂や破壊などの
ごとき不具合はいっさいないものとなる。
また、熱可塑性樹脂製ナツト4には、そのねじ軸方向と
直交する方向に突出する抜け防止用突起部4bをそなえ
たものとしているので、熱硬化性樹脂製インテークマニ
ホールド1の成形後には、この抜け防止用突起部4bが
熱硬化性樹脂によって包まれた状態となることから、熱
可塑性樹脂製ナツト4がボス部1aより抜け出るおそれ
は全くないものとなっている・
さらに、低融点金属よりなる中子3を溶融除去する際の
高周波誘導加熱において、熱可塑性樹脂製ナツト4の表
面に塗布した磁性体を含む被覆材5の前記磁性体が発熱
することにより熱可塑性樹脂が加熱されて適度に軟化す
るため、熱硬化性樹脂製インテークマニホールド1への
熱可塑性樹脂製ナツト4の固定がより強固なものになる
。
さらにまた、ナツト4は熱可塑性樹脂より形成されてい
るため、補機類をねじ締結により取付けた場合に、前記
ねじ締結の部分で適度の伸びを生ずることとなるので、
補機類等を介して繰り返しの応力が加わったとしてもね
じ山の部分に亀裂を生じたり破壊をもたらしたりするよ
うなことがなくなる。(Means for Solving the Problems) An intake manifold according to the present invention is provided with a thermoplastic resin nut for fastening auxiliary equipment, which is integrated by insert molding when the intake manifold is molded using a thermosetting resin. The structure of the intake manifold made of such a thermosetting resin is a means for solving the above-mentioned conventional problems. In the thermosetting resin intake manifold according to the present invention, as the thermosetting resin. Examples include phenol resin, epoxy resin, and other unsaturated polyester resins mixed with glass wool (BMC) (<Luc Molding Compound), but are not particularly limited. In addition, in the thermoplastic resin nut that is combined by insert molding when molding the intake manifold with this thermosetting resin, thermoplastic resins include polyamide (nylon) and polypropylene, but these are also particularly limited. Not allowed. In order to prevent the thermoplastic resin nuts from coming off the thermosetting resin intake manifold after the thermoplastic resin nuts are inserted and molded when the thermosetting resin intake manifold is molded. In addition, it is also necessary to provide a part of the thermoplastic resin nut with a protrusion that protrudes in a direction perpendicular to the screw axis and is wrapped in the thermosetting resin part of the intake manifold after insert molding to prevent it from coming off. Desirable accordingly. Further, the intake manifold is molded with a thermosetting resin with a core made of a low melting point metal provided in the hollow portion of the intake manifold, and then the core made of the low melting point metal is melted and removed by high frequency induction heating. When using a process, the surface portion of the thermoplastic resin nut is coated with a coating material containing a magnetic material, and when this coating is performed, for example, during molding of the thermoplastic resin nut, the coating material containing the magnetic material is applied by in-mold coating. The material was coated on the surface of the thermoplastic resin nut, and the thermoplastic resin nut whose surface portion was coated with the coating material containing the magnetic material was placed at the required location of the intake manifold mold. If necessary, it is also desirable to mold the intake manifold using a thermosetting resin so that the thermoplastic resin nut is integrally joined by insert molding. In this case, since the magnetic material is present at the boundary between the intake manifold made of thermosetting resin and the nut made of thermoplastic resin, the magnetic material is present in the boundary between the intake manifold made of thermosetting resin and the nut made of thermoplastic resin. When the magnetic body is melted and removed by high-frequency induction heating, the magnetic body also generates heat due to high-frequency induction heating, so the nut made of thermoplastic resin is moderately softened. It becomes possible to further strengthen the bond between the intake manifold and the intake manifold made of resin. (Function of the Invention) Since the intake manifold according to the present invention has the above-described configuration, the connection of the thermoplastic resin nut to the thermosetting resin intake manifold becomes extremely strong, and Since the nuts that fasten the auxiliary equipment are made of thermoplastic resin, the internal threads of the nuts are subject to appropriate elongation, so even when repeated stress is applied to the auxiliary equipment, the Appropriate elongation of the female threaded portion makes it difficult for cracks and breakage to occur, making it easier to attach auxiliary equipment to the thermosetting resin intake manifold. (Example) FIG. 2 shows a state of the thermosetting resin intake manifold 1 having the shape illustrated in FIG. 1 immediately after molding. In Fig. 2, an intake manifold 1 made of thermosetting resin is molded into a hollow shape using a mold 2 and a core 3 made of a low-melting point metal, and has a cylindrical boss for attaching auxiliary equipment such as a collector. It has a portion 1a and a boss portion reinforcing portion 1b. The mold 2 at the portion corresponding to the boss portion 1a and the boss portion reinforcing portion 1b is provided with a concave portion 2a for forming the boss portion and the boss portion reinforcing portion, and four portions for forming the boss portion and the boss portion reinforcing portion. 2a is provided with a protruding portion 2b into which a female threaded portion 4a on the inner peripheral side of a thermoplastic resin nut 4 formed in advance is inserted. An intake manifold 1 made of thermosetting resin is manufactured using such a mold 2 and a core 3 made of a low melting point metal.
When molding, first, it is molded from thermoplastic resin into a cylindrical shape with one end closed, and has a female thread part 4a on the inner peripheral part, and a thread in the outer peripheral direction (i.e., orthogonal to the screw axis) at the closed end. A thermoplastic resin nut 4 is manufactured, which has a pull-out prevention protrusion 4b that protrudes in a direction in which the thermoplastic resin is molded, and whose outer surface is coated with a coating material 5 containing a magnetic material by in-mold coating during molding of the thermoplastic resin. After fitting this thermoplastic resin nut 4 into the protrusion 2b provided on the boss portion and the four parts 2a for molding the boss portion reinforcement portion of the mold 2, the mold 2
and a core 3 made of a low melting point metal are combined to form an intake manifold molding space, and then a thermosetting resin is injected and molded into the shape of the intake manifold, and the thermoplastic resin nut 4 is insert molded. As a result, a thermosetting resin intake manifold injection molded body is obtained, in which the thermoplastic resin nut 4 is integrally bonded by insert molding. Next, this intake manifold injection molded body was
It is immersed in an oil bath 11 shown in the figure. The oil bath 11 shown in FIG. 3 has a heater 13 on the outside of an oil container 12, a high-frequency induction heating coil 14 inside, and houses oil 15. The injection molded article is immersed in oil 15 while being clamped by a clamping device 16 and placed in a high frequency induction heating coil 14,
The core 3 made of a low melting point metal is melted by high frequency induction heating by the high frequency induction coil 14. At this time, the melted low melting point metal 3' accumulates at the bottom of the oil container 12. Also, during this high-frequency induction heating, the magnetic material applied to the surface of the thermoplastic resin nut 4 and surrounded by the boss portion (1a) of the intake manifold injection molded product after the intake manifold injection molded product is molded is removed. The magnetic material contained in the covering material 5 generates heat by high-frequency induction heating, and the thermoplastic resin nut 4 is heated and softened appropriately, thereby making the bond with the intake manifold 1 made of a thermosetting resin stronger. The thermosetting resin intake manifold 1 manufactured according to this embodiment has a thermoplastic resin nut 4 integrally provided on its boss portion 1a by insert molding. 4 is fixed firmly enough, and the self-tapping male threaded part 10a is fixed as in the case where the female threaded part tab is provided by screwing in the self-tapping male threaded part 10a of the conventional self-tapping screw 10. There will be no problems such as cracks or destruction due to screwing. Furthermore, since the thermoplastic resin nut 4 is provided with a pull-out prevention protrusion 4b that protrudes in a direction perpendicular to the screw axis direction, after molding the thermosetting resin intake manifold 1, this Since the slip-out prevention protrusion 4b is wrapped in thermosetting resin, there is no possibility that the thermoplastic resin nut 4 will slip out from the boss portion 1a.Furthermore, it is made of a low melting point metal. During high-frequency induction heating when melting and removing the core 3, the magnetic material of the coating material 5 containing a magnetic material coated on the surface of the thermoplastic resin nut 4 generates heat, and the thermoplastic resin is heated to an appropriate level. Since it is softened, the fixation of the thermoplastic resin nut 4 to the thermosetting resin intake manifold 1 becomes stronger. Furthermore, since the nut 4 is made of thermoplastic resin, when auxiliary equipment is attached by screwing, a moderate amount of elongation will occur at the screwed portion.
Even if repeated stress is applied via auxiliary equipment etc., the screw threads will not crack or break.
この発明に係わるインテークマニホールドは。
熱硬化性樹脂よりなるものであって、熱硬化性樹脂によ
るインテークマニホールドの成形時にインサート成形に
より結合一体止された補機類締結用の熱可塑性樹脂製ナ
ツトをそなえた構成のものとしたから、熱可塑性樹脂製
ナツトの熱硬化性樹脂製インテークマニホールドへの結
合を強固なものとすることが可能であって強度的にも十
分な補機類取付は用の締結部分を有するものとなり、し
たがって、この熱可塑製樹脂製ナツトにコレクター等を
補機類をねじ締結により取付けた際にこの取付けを十分
良好に行うことが可能であり、補機類等の介してねじ締
結部分に繰り返しの応力が付加されたときでも熱可塑性
樹脂によるねじ締結部分の伸びによってねじ締結部分に
亀裂や破壊が生じがたいものになるという著しく優れた
効果がもたらされる。The intake manifold according to this invention is: It is made of thermosetting resin, and is equipped with a thermoplastic resin nut for fastening auxiliary equipment, which is integrally joined by insert molding when the intake manifold is molded from the thermosetting resin. The attachment of auxiliary equipment that can firmly connect the thermoplastic resin nut to the thermosetting resin intake manifold and has sufficient strength has a fastening part. When accessories such as collectors are attached to this thermoplastic resin nut by screw fastening, this installation can be done satisfactorily, and repeated stress is not applied to the screwed parts through the accessories. Even when the thermoplastic resin is added to the screw fastening portion, the stretch of the screw fastening portion results in an extremely excellent effect in that the screw fastening portion is difficult to crack or break.
第1図は熱硬化性樹脂製インテークマニホールドの形状
を例示する部分斜視図、第2図はこの発明の一実施例に
よる熱硬化性樹脂製インテークマニホールドの成形完了
後におけるインテークマニホールド射出成形体と金型お
よび中子を示す部分断面図、第3図は第2図に示したイ
ンテークマニホールド射出成形体の低融点金属よりなる
中子を溶融除去して中空部分を有するインテークマニホ
ールドとする工程を示す断面説明図、第4図は従来の熱
硬化性樹脂製インテークマニホールドにおいて補機類締
結用のセルフタラピンクねじを固定する状況を示す断面
説明図である。
1・・・熱硬化性樹脂製インテークマニホールド、3・
・・熱可塑性樹脂製ナツト。Fig. 1 is a partial perspective view illustrating the shape of a thermosetting resin intake manifold, and Fig. 2 shows an intake manifold injection molded body and a molded body after completion of molding of the thermosetting resin intake manifold according to an embodiment of the present invention. A partial cross-sectional view showing a mold and a core, and FIG. 3 is a cross-sectional view showing the process of melting and removing the core made of a low-melting point metal of the intake manifold injection molded product shown in FIG. 2 to form an intake manifold having a hollow portion. FIG. 4 is a cross-sectional explanatory view showing a state in which self-aligning screws for fastening auxiliary equipment are fixed in a conventional intake manifold made of thermosetting resin. 1...Thermosetting resin intake manifold, 3.
...Thermoplastic resin nut.
Claims (2)
形時にインサート成形により結合一体化された補機類締
結用の熱可塑性樹脂製ナットをそなえたことを特徴とす
る熱硬化性樹脂製インテークマニホールド。(1) A thermosetting resin intake manifold characterized by being equipped with a thermoplastic resin nut for fastening auxiliary equipment that is integrated by insert molding during molding of the thermosetting resin intake manifold.
じ軸方向と交差する方向に突出してインテークマニホー
ルドの熱硬化性樹脂部分で包まれる抜け防止用突起部を
そなえた請求項第1項に記載の熱硬化性樹脂製インテー
クマニホールド。(2) A thermoplastic resin nut for fastening auxiliary equipment is provided with a pull-out prevention protrusion that protrudes in a direction intersecting the thread axis direction and is wrapped in the thermosetting resin portion of the intake manifold. Thermosetting resin intake manifold as described in .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14384090A JPH0441970A (en) | 1990-06-01 | 1990-06-01 | Intake manifold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14384090A JPH0441970A (en) | 1990-06-01 | 1990-06-01 | Intake manifold |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0441970A true JPH0441970A (en) | 1992-02-12 |
Family
ID=15348173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14384090A Pending JPH0441970A (en) | 1990-06-01 | 1990-06-01 | Intake manifold |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0441970A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112011102107T5 (en) | 2010-06-24 | 2013-03-28 | Fujikura Ltd. | Automotive cable |
-
1990
- 1990-06-01 JP JP14384090A patent/JPH0441970A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112011102107T5 (en) | 2010-06-24 | 2013-03-28 | Fujikura Ltd. | Automotive cable |
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