JPH0617056B2 - Air duct manufacturing equipment - Google Patents
Air duct manufacturing equipmentInfo
- Publication number
- JPH0617056B2 JPH0617056B2 JP61302635A JP30263586A JPH0617056B2 JP H0617056 B2 JPH0617056 B2 JP H0617056B2 JP 61302635 A JP61302635 A JP 61302635A JP 30263586 A JP30263586 A JP 30263586A JP H0617056 B2 JPH0617056 B2 JP H0617056B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- duct
- extrusion
- air duct
- extruder
- 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.)
- Expired - Lifetime
Links
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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/337—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location
- B29C48/338—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location using a die with concentric parts, e.g. rings, cylinders
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/388—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a ram or piston
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
-
- 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
- B29C49/041—Extrusion blow-moulding using an accumulator head
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、自動車のエンジン吸気系もしくは空調装置の
送風系等に用いられるエアダクト（以下、単にダクトと
いう）をブロー成形法によつて製造する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for manufacturing an air duct (hereinafter simply referred to as a duct) used in an engine intake system of an automobile or a ventilation system of an air conditioner by a blow molding method. .
従来の技術 例えば第３図に示すようにベローズ部２をもつダクト１
について、その内外層１ａ，１ｂを例えばポリプロピレ
ン（PP）等の硬質樹脂で形成する一方、中間層１ｃを例
えばサーモプラスチツクエラストマー（TPE）等の軟質
樹脂で形成したいわゆる複合３層構造のものが提案され
るに至つている。そして、この種の複合構造のダクトを
ブロー成形するのに好適な装置として例えば特開昭６０
−１６８６２５号公報に示されたものがある。2. Description of the Related Art For example, a duct 1 having a bellows portion 2 as shown in FIG.
Regarding the inner and outer layers 1a and 1b, for example, a so-called composite three-layer structure in which the intermediate layer 1c is formed of a soft resin such as thermoplastic elastomer (TPE) while the outer layer 1a, 1b is formed of a hard resin such as polypropylene (PP) is proposed. Has been reached. An apparatus suitable for blow molding a duct of this type of composite structure is disclosed in, for example, JP-A-60
There is one disclosed in Japanese Patent Publication No. 168625.
同公報に示された製造装置は押出ヘツドの構造に特徴が
あり、別個の押出機で可塑化された少なくとも２種類の
樹脂を、例えば３層構造の押出口をもつ共通の押出ヘツ
ドから押し出してパリソンを形成し、このパリソンを成
形型内に収容してブロー成形するようにしたものであ
る。各押出機から押出ヘツドの押出口に至る樹脂通路の
途中にはシヤツトオフバルブが設けられており、成形す
べきダクトの材質配分に応じて各樹脂ごとの押出量が調
節される。The manufacturing apparatus shown in the publication is characterized by the structure of an extrusion head, and at least two kinds of resin plasticized by separate extruders are extruded from a common extrusion head having an extrusion port of a three-layer structure, for example. A parison is formed, and the parison is housed in a molding die and blow-molded. A shut-off valve is provided in the middle of the resin passage from each extruder to the extrusion port of the extrusion head, and the extrusion amount for each resin is adjusted according to the material distribution of the duct to be molded.
発明が解決しようとする問題点 従来の装置においては、前述したように成形すべきダク
トの材質に応じた各樹脂ごとの押出量がシヤツトオフバ
ルブの開閉動作によつて制御されることから、いずれか
の樹脂の押し出しを断つべくシヤツトオフバルブを閉動
作させると、押出機や樹脂通路の内圧が異常に高圧にな
ることがあり、何らかの対策を講じておく必要がある。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional apparatus, as described above, the extrusion amount of each resin according to the material of the duct to be molded is controlled by the opening / closing operation of the shut-off valve. If the shut-off valve is closed to cut off the extrusion of the resin, the internal pressure of the extruder or the resin passage may become abnormally high, and it is necessary to take some measures.
また、上記のシヤツトオフバルブは基本的にON−OFF 切
換弁であるため、例えば第３図の内外層１ａ，１ｂと中
間層１ｃとの肉厚の比率を局部的に変えるように制御す
ることは難しい。加えて、上記のシヤツトオフバルブの
場合には応答遅れがあるため、例えばシヤツトオフバル
ブが開閉動作しても、それに追従して押し出される樹脂
が直ちに切り換わらず徐々に切り換わることになる。そ
のため、材質配分の上での品質が低下することになる。Further, since the shut-off valve described above is basically an ON-OFF switching valve, it is necessary to control so as to locally change the wall thickness ratio between the inner and outer layers 1a and 1b and the intermediate layer 1c in FIG. 3, for example. Is difficult In addition, in the case of the shut-off valve described above, there is a response delay, so that even if the shut-off valve opens and closes, for example, the resin extruded following it will not switch immediately but gradually switch. Therefore, the quality in terms of material distribution is deteriorated.
問題点を解決するための手段 本発明は上記のような問題点を解決するためになされた
もので、実施例にも示すように、少なくとも２種類の材
質部分を有する複合材質のエアダクトを製造するにあた
り、別個の押出機で可塑化された少なくとも２種類の樹
脂を成形すべきダクトを材質配分に応じて共通の押出へ
ツドから押し出してパリソンを形成し、このパリソンに
基づいて前記エアダクトをブロー成形する装置であつ
て、前記各押出機から押出ヘツドの押出口に至る樹脂通
路の途中に、可塑化樹脂を一時的に貯えて、各樹脂ごと
の押出量を調節するアキユームレータを介装したことを
特徴とするものである。Means for Solving Problems The present invention has been made to solve the above problems, and as shown in the embodiments, manufactures an air duct of a composite material having at least two kinds of material parts. At this time, a duct for molding at least two kinds of resins plasticized by separate extruders is extruded from a common extrusion head according to material distribution to form a parison, and the air duct is blow-molded based on this parison. In the device, a plasticizer resin is temporarily stored in the middle of the resin passage from each extruder to the extrusion port of the extrusion head, and an accumulator for adjusting the extrusion amount of each resin is interposed. It is characterized by that.
作用 本発明によれば、押出機から押し出された可塑化樹脂は
例えばシリンダ駆動のアキユームレータに一旦貯えら
れ、成形すべきダクトの材質配分に応じてアキユームレ
ータから押出ヘツドに押し出される。Operation According to the present invention, the plasticized resin extruded from the extruder is temporarily stored in, for example, a cylinder-driven accumulator, and extruded from the accumulator to the extrusion head according to the material distribution of the duct to be molded.
実施例 第１図は本発明の一実施例を示す構成説明図で、第２図
に示すダクトを成形するための押出ヘツドを示してい
る。EXAMPLE FIG. 1 is a structural explanatory view showing an example of the present invention and shows an extrusion head for forming the duct shown in FIG.
第２図のダクト３は、その中間部にベローズ部４を備え
ているほか、コーナー部５には小径のパイプ部６が一体
に成形されている。上記のダクト３自体は３層の複合材
質構造となつており、内外層３ａ，３ｂは例えばポリプ
ロピレン(PP)等の硬質樹脂で形成される一方、中間層３
ｃについては例えばサーモプラスチツクエラストマー(T
PE)等の軟質樹脂にて形成されている。The duct 3 shown in FIG. 2 is provided with a bellows portion 4 at an intermediate portion thereof, and a corner portion 5 is integrally formed with a pipe portion 6 having a small diameter. The duct 3 itself has a three-layer composite material structure, and the inner and outer layers 3a and 3b are made of a hard resin such as polypropylene (PP), while the intermediate layer 3 is formed.
For c, for example, Thermoplastic elastomer (T
It is made of soft resin such as PE.
そして、ベローズ部４についてはその本来の機能からし
て屈曲柔軟性が要求され、また両端の口部７，８につい
ては相手ダクトとの結合の際にシール性が要求されるこ
とから、これらベローズ部４および口部７，８について
は軟質の中間層３ｃの厚みが内外層３ａ，３ｂよりも厚
肉となるように設定されている。他方、コーナー部５に
ついてはパイプ部６が一体成形されることもあつて所要
の剛性が必要とされ、そのためにコーナー部５について
は少なくとも硬質の外層３ｂが中間層３ｃよりも厚肉と
なるように設定されている。これは一般部９についても
同様である。Since the bellows portion 4 is required to have bending flexibility due to its original function, and the mouth portions 7 and 8 at both ends are required to have a sealing property at the time of coupling with a mating duct, these bellows portions are required. Regarding the portion 4 and the mouth portions 7 and 8, the thickness of the soft middle layer 3c is set to be thicker than that of the inner and outer layers 3a and 3b. On the other hand, the corner portion 5 is required to have a required rigidity because the pipe portion 6 is integrally formed, so that at least the hard outer layer 3b of the corner portion 5 is thicker than the intermediate layer 3c. Is set to. This also applies to the general section 9.
第１図において、押出ヘツド10のヘツド本体11内には押
出口12に通ずる３層の樹脂通路13，14，15が隔壁16，17
によつて形成されており、通路13は第１の押出機18のノ
ズル部19に、通路14は第２の押出機20のノズル部21に、
通路15は第３の押出機22のノズル部23にそれぞれ接続さ
れている。24は空気導入路で、この空気導入路24は図示
外の空気圧力源に接続されている。25はスクリユーであ
る。In FIG. 1, three layers of resin passages 13, 14, 15 communicating with the extrusion port 12 are formed in the head main body 11 of the extrusion head 10, and partition walls 16, 17 are provided.
The passage 13 to the nozzle section 19 of the first extruder 18, the passage 14 to the nozzle section 21 of the second extruder 20,
The passages 15 are respectively connected to the nozzle portions 23 of the third extruder 22. Reference numeral 24 is an air introduction passage, and this air introduction passage 24 is connected to an air pressure source (not shown). 25 is a screen.
そして、各通路13，14，15の途中には、シリンダ26駆動
のプランジヤ27とチヤンバ部28とからなるアキユームレ
ータ29，30，31がそれぞれに介装されており、各押出機
18，20，22から押し出された可塑化樹脂がアキユームレ
ータ29，30，31のいずれかに一旦貯えられるようになつ
ている。32は押出ヘツド10から押し出されたパリソンの
長さを検出するセンサーである。And, in the middle of each of the passages 13, 14 and 15, accumulators 29, 30 and 31 composed of a plunger 27 driven by a cylinder 26 and a chamber portion 28 are respectively interposed, and each extruder is
The plasticized resin extruded from 18, 20, 22 is once stored in any of the accumulators 29, 30, 31. A sensor 32 detects the length of the parison extruded from the extrusion head 10.
上記の押出ヘツド10において第２図に示したダクト３を
成形する場合には、例えば第１の押出機18では内層３ａ
を形成する硬質樹脂が、第２の押出機20では外層３ｂを
形成する硬質樹脂がそれぞれ可塑化され、また第３の押
出機22では中間層3cを形成する軟質樹脂がそれぞれ可塑
化される。これら各押出機18，20，22で可塑化された樹
脂はアキユームレータ29，30，31に貯えられている。When the duct 3 shown in FIG. 2 is formed in the extrusion head 10 described above, for example, in the first extruder 18, the inner layer 3a
In the second extruder 20, the hard resin forming the outer layer 3b is plasticized, and in the third extruder 22, the soft resin forming the intermediate layer 3c is plasticized. The resins plasticized by these extruders 18, 20, 22 are stored in accumulators 29, 30, 31.
そして、各アキユームレータ29，30，31のプランジヤ27
を一斉に前進させてパリソンＰを押し出すことになる
が、口部８に相当するところの長さl1については中間層
３ｃを厚肉とするためにアキユームレータ31のプランジ
ヤ27の速度を他の２つのアキユームレータ29，30の速度
よりも大きくして軟質樹脂の押出量を相対的に大きくす
る。逆にコーナー部５に相当するところの長さl2につい
ては外層３ｂを厚肉とするためにアキユームレータ30の
プランジヤ27の速度を他の２つのアキユームレータ29，
31の速度よりも大きくする。また、ベローズ部４に相当
するところの長さl3については中間層３ｃを厚肉とする
ためにアキユームレータ31のプランジヤ27の速度を相対
的に大きくする。And the plunger 27 of each accumulator 29, 30, 31
To push out the parison P all at once, but for the length l 1 corresponding to the mouth portion 8, the speed of the plunger 27 of the accumulator 31 is changed in order to make the intermediate layer 3c thicker. The speeds of the two accumulators 29 and 30 are set to be relatively large so that the extrusion amount of the soft resin is relatively large. On the contrary, for the length l 2 corresponding to the corner portion 5, the speed of the plunger 27 of the accumulator 30 is set to the other two accumulators 29, in order to make the outer layer 3b thick.
Greater than 31 speed. Further, for the length l 3 corresponding to the bellows portion 4, the speed of the plunger 27 of the accumulator 31 is relatively increased in order to make the intermediate layer 3c thick.
このように、成形すべきダクトの材質配分に応じて各樹
脂の押出量を調節することにより第１図に示すパリソン
Ｐが成形される。そして、パリソンＰを押出ヘツド10の
直下に配した金型（図示省略）に収容して上で空気導入
路24からエアを吹き込めば第２図に示したダクト３がブ
ロー成形される。Thus, the parison P shown in FIG. 1 is molded by adjusting the extrusion amount of each resin according to the material distribution of the duct to be molded. Then, the parison P is housed in a mold (not shown) arranged immediately below the extrusion head 10 and air is blown from the air introduction passage 24 above, so that the duct 3 shown in FIG. 2 is blow-molded.
尚、ダクト３の内外層３ａ，３ｂを形成する硬質樹脂と
中間層３ｃを形成する軟質樹脂とは相互に親和性をもつ
ことが望ましいが、先に例示したポリプロピレンとサー
モプラスチツクエラストマーの組み合わせに限定される
ものでないことは言うまでもない。It is desirable that the hard resin forming the inner and outer layers 3a and 3b of the duct 3 and the soft resin forming the intermediate layer 3c have an affinity for each other, but the combination is limited to the combination of polypropylene and the thermoplastic elastomer illustrated above. It goes without saying that this is not what is done.
発明の効果 本発明によれば、ダクトの材質配分に応じた各樹脂ごと
の押出量を調節する手段としてアキユームレータを介装
したことにより、従来のシヤツトオフバルブを用いた場
合と比べて樹脂通路等が高圧になることがなく、また樹
脂の押出量切換時の応答性も著しくすぐれることから材
質配分の上での品質が向上する。EFFECTS OF THE INVENTION According to the present invention, since an accumulator is provided as a means for adjusting the extrusion amount of each resin according to the material distribution of the duct, the resin is compared with the case where the conventional shutoff valve is used. Since the passages and the like do not have a high pressure, and the responsiveness at the time of changing the extrusion amount of the resin is remarkably excellent, the quality in material distribution is improved.
また、例えば内層と外層との肉厚の比率が局部的に異な
るダクトについても容易に成形することができる。Further, for example, a duct having locally different wall thickness ratios between the inner layer and the outer layer can be easily molded.
第１図は本発明の一実施例を示す押出ヘツドの構成説明
図、第２図は第１図の押出ヘツドを有する装置にて成形
されたダクトの断面図、第３図は従来のダクトの一部破
断説明図である。 ３……エアダクト、３ａ……内層、３ｂ……外層、３ｃ
……中間層、10……押出ヘツド、12……押出口、13，1
4，15……樹脂通路、18……第１の押出機、20……第２
の押出機、22……第３の押出機、24……空気導入路、2
9，30，31……アキユームレータ、Ｐ……パリソン。FIG. 1 is a structural explanatory view of an extrusion head showing an embodiment of the present invention, FIG. 2 is a sectional view of a duct molded by an apparatus having the extrusion head of FIG. 1, and FIG. 3 is a conventional duct. It is a partially broken explanatory view. 3 ... Air duct, 3a ... Inner layer, 3b ... Outer layer, 3c
...... Middle layer, 10 …… Extrusion head, 12 …… Extrusion port, 13, 1
4,15 …… Resin passage, 18 …… First extruder, 20 …… Second
Extruder, 22 …… Third extruder, 24 …… Air inlet, 2
9,30,31 …… Akiumulator, P …… Parison.
Claims (1)
材質のエアダクトを製造するにあたり、別個の押出機で
可塑化された少なくとも２種類の樹脂を、成形すべきダ
クトの材質配分に応じて共通の押出へツドから押し出し
てパリソンを形成し、このパリソンに基づいて前記エア
ダクトをブロー成形する装置であつて、前記各押出機か
ら押出ヘツドの押出口に至る樹脂通路の途中に、可塑化
樹脂を一時的に貯えて、各樹脂ごとの押出量を調節する
アキユームレータを介装したことを特徴とするエアダク
トの製造装置。1. When manufacturing an air duct of a composite material having at least two kinds of material parts, at least two kinds of resin plasticized by separate extruders are used in common according to the material distribution of the duct to be molded. A device for forming a parison by extruding from an extrusion head and blow molding the air duct based on this parison, wherein a plasticized resin is temporarily provided in the middle of the resin passage from each extruder to the extrusion port of the extrusion head. A device for manufacturing an air duct, which is characterized in that an accumulator is installed to temporarily store and adjust an extrusion amount of each resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61302635A JPH0617056B2 (en) | 1986-12-18 | 1986-12-18 | Air duct manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61302635A JPH0617056B2 (en) | 1986-12-18 | 1986-12-18 | Air duct manufacturing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63154327A JPS63154327A (en) | 1988-06-27 |
| JPH0617056B2 true JPH0617056B2 (en) | 1994-03-09 |
Family
ID=17911357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61302635A Expired - Lifetime JPH0617056B2 (en) | 1986-12-18 | 1986-12-18 | Air duct manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617056B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2782185B2 (en) * | 1997-02-05 | 1998-07-30 | 株式会社プラコー | Blow molding equipment for synthetic resin automotive air-conditioning duct tubes |
| IT1311996B1 (en) * | 1999-03-30 | 2002-03-22 | Uniloy S R L S U Ora Uniloy Mi | MACHINE FOR THE PRODUCTION OF CABLE BODIES COMPOSED OF MULTIPLE MATERIALS AND METHOD. |
| FR3067967A1 (en) * | 2017-06-22 | 2018-12-28 | Compagnie Generale Des Etablissements Michelin | INSTALLATION AND COEXTRUSION METHOD |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51134758A (en) * | 1975-05-19 | 1976-11-22 | Ishikawajima Harima Heavy Ind | Method and device for controlling thickness of extrusion molded multiilayer column |
| JPS5237026A (en) * | 1975-09-17 | 1977-03-22 | Matsushita Electric Ind Co Ltd | Dropout prevention method |
| JPS5330660A (en) * | 1976-09-02 | 1978-03-23 | Tousen Purasuto Kk | Ventilating pipe with synthetic resin silencer |
| JPS5753175A (en) * | 1980-09-16 | 1982-03-30 | Nec Corp | Absence transfer system |
| JPS5856506B2 (en) * | 1980-10-31 | 1983-12-15 | 石川島播磨重工業株式会社 | blow molding machine |
| JPS60168625A (en) * | 1984-02-13 | 1985-09-02 | Ekuseru Kk | Manufacture of hollow molded article provided with composite material and manufacturing device thereof |
| JPS6195926A (en) * | 1984-10-18 | 1986-05-14 | Kinugawa Rubber Ind Co Ltd | Molding method of duct provided with resonator |
-
1986
- 1986-12-18 JP JP61302635A patent/JPH0617056B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63154327A (en) | 1988-06-27 |
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