JPH06155509A - Production of resin tubular body - Google Patents
Production of resin tubular bodyInfo
- Publication number
- JPH06155509A JPH06155509A JP4330033A JP33003392A JPH06155509A JP H06155509 A JPH06155509 A JP H06155509A JP 4330033 A JP4330033 A JP 4330033A JP 33003392 A JP33003392 A JP 33003392A JP H06155509 A JPH06155509 A JP H06155509A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- injected
- mold
- resin
- core
- 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
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1676—Making multilayered or multicoloured articles using a soft material and a rigid material, e.g. making articles with a sealing part
-
- 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
- B29C45/16—Making multilayered or multicoloured 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
- B29C2045/1719—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles making 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
- B29C2045/1724—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles hollows used as conduits
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の異種材料からな
る部分が一体成形された樹脂製管状体の製造方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a resin tubular body in which a plurality of parts made of different materials are integrally molded.
【０００２】[0002]
【従来の技術】従来、異種材料からなる部分が一体成形
された樹脂製中空体の製造方法としては、次に説明する
方法がある。2. Description of the Related Art Conventionally, as a method of manufacturing a hollow resin body in which parts made of different materials are integrally molded, there is a method described below.
【０００３】押出ヘッド内で押出す樹脂の種類を切替え
て押出すことにより複数の異種材料からなるパリスンを
押し、このパリスンをブロー成形することにより複合材
質からなる中空成形品を製造する（特公平２−１５３７
３号公報参照）。By changing the type of resin to be extruded in the extruding head and extruding, a parison made of a plurality of different materials is pushed, and the parison is blow-molded to manufacture a hollow molded article made of a composite material (Japanese Patent Publication No. 2-1537
(See Japanese Patent Publication No. 3).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来の技術では、異種材料からなる溶融樹脂を同一の押出
ヘッドから押出すことから、成形条件の近似した異種材
料を使用しない場合には、パリスンの押出時の形状維持
性やパリスンの膨張性が悪くなり、歩留りが低い。ま
た、異種材料の切替えは、押出速度の調整または流量調
整バルブ等によって行うために完全な切替えが困難であ
るとともに、中空成形品の内面の形状寸法を高精度なも
のとすることはできないという問題点がある。However, in the above-mentioned conventional technique, the molten resin composed of different materials is extruded from the same extrusion head. The shape retention during extrusion and the expandability of the parison are poor, and the yield is low. Further, since different materials are switched by adjusting an extrusion speed or a flow rate control valve, it is difficult to completely switch the materials, and the shape and dimensions of the inner surface of the hollow molded product cannot be made highly accurate. There is a point.
【０００５】本発明は、上記従来の技術の有する問題点
に鑑みてなされたものであって、異種材料のそれぞれの
成形性等に影響されることなく歩留りの高い成形がで
き、しかも内面の少くとも一部分の形状、寸法を高精度
なものとすることができる樹脂製管状体の製造方法を実
現することを目的とするものである。The present invention has been made in view of the above-mentioned problems of the prior art. It is possible to perform a high yield molding without being affected by the moldability of different kinds of materials and to reduce the inner surface. It is an object of the present invention to realize a method for manufacturing a resin-made tubular body in which the shape and size of a part can be made highly accurate.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明の樹脂製管状体の製造方法は、複数の異種材
料からなる部分が一体成形された樹脂製管状体の製造方
法であって、前記樹脂製管状体の外周面を規制するキャ
ビティを有する分割形式の金型を、前記キャビティ内に
少くとも一つのコア型を突出させて型閉じし、前記キャ
ビティ内の前記コア型との間の空隙部を含む複数部位に
異種材料からなる複数の溶融樹脂をそれぞれ射出注入
し、その内の少くとも一つの溶融樹脂の内部へ加圧流体
を注入して中空部を形成し、前記複数の溶融樹脂の境界
面を溶着させて中空の成形品を一体成形したのち、前記
成形品を金型内で冷却することを特徴とするものであ
る。In order to achieve the above object, the method for producing a resin tubular body of the present invention is a method for producing a resin tubular body in which a plurality of parts made of different materials are integrally molded. A mold of a split type having a cavity that regulates the outer peripheral surface of the resin tubular body, at least one core mold is projected into the cavity and the mold is closed, and the core mold in the cavity is A plurality of molten resins made of different materials are respectively injected and injected into a plurality of portions including voids between them, and a pressurized fluid is injected into at least one of the molten resins to form a hollow portion. After melting the boundary surface of the molten resin of (1) to integrally form a hollow molded product, the molded product is cooled in a mold.
【０００７】[0007]
【作用】 キャビティ内へコア型を突出させることによ
って前記コア型とキャビティとの間に形成された空隙部
へ射出注入された溶融樹脂は、その内面の形状、寸法が
高精度なものとなる。The molten resin injected and injected into the cavity formed between the core mold and the cavity by projecting the core mold into the cavity has a highly accurate inner surface shape and size.
【０００８】また、キャビティ内の複数部位にそれぞれ
射出注入された異種材料からなる複数の溶融樹脂の内、
その内部へ加圧流体が注入された溶融樹脂は、中空部が
形成されて隣接する他の溶融樹脂との境界面で溶着され
て一体成形される。Further, among a plurality of molten resins made of different materials, which are respectively injected and injected into a plurality of portions in the cavity,
The molten resin, into which the pressurized fluid is injected, has a hollow portion formed therein and is welded at an interface with another adjacent molten resin to be integrally molded.
【０００９】[0009]
【実施例】本発明の実施例を図面に基づいて説明する。Embodiments of the present invention will be described with reference to the drawings.
【００１０】図１は、本発明により製造された樹脂製管
状体の一例である、自動車用吸気ダクトの斜視図であ
り、図２はその断面図である。FIG. 1 is a perspective view of an automobile air intake duct, which is an example of a resin tubular body manufactured according to the present invention, and FIG. 2 is a sectional view thereof.
【００１１】図１および図２に示すように、自動車用吸
気ダクトは、屈曲部をもつ管状本体部１と、その両端部
の一方の口部２および他方の口部３と、管状本体部材１
の任意の部位に一体成形された分岐口部４とを有し、一
方の口部２および他方の口部３は、外周面に段差部２
Ａ，３Ａを有するとともに、管状本体部１とは異種の熱
可塑性樹脂材料からなり、それぞれ境界面５Ａ，５Ｂで
成形時に溶着されて一体成形されたものである。例え
ば、口部２，３はポリプロピレンに熱可塑性エラストマ
ーを混入した軟質な樹脂にて構成し、分岐口部４および
管状本体部１はポリプロピレンに炭素繊維を混入した硬
質な樹脂にて構成される。As shown in FIGS. 1 and 2, an automobile air intake duct has a tubular main body 1 having a bent portion, one opening 2 and the other opening 3 at both ends thereof, and a tubular main body member 1.
Of the stepped portion 2 on the outer peripheral surface.
In addition to having A and 3A, they are made of a thermoplastic resin material different from that of the tubular main body 1, and are integrally molded by welding at the boundary surfaces 5A and 5B during molding. For example, the mouth portions 2 and 3 are made of a soft resin in which polypropylene is mixed with a thermoplastic elastomer, and the branching mouth portion 4 and the tubular body portion 1 are made of a hard resin in which polypropylene is mixed with carbon fiber.
【００１２】次に、本発明の一実施例を、図１および図
２に示す自動車用吸気ダクトを製造する場合を例にあげ
て説明する。Next, one embodiment of the present invention will be described by taking as an example the case of manufacturing the automobile air intake duct shown in FIGS.
【００１３】図３に示すように、分割形式の金型である
割型１０は、樹脂製管状体の外面を規制するためのキャ
ビティ１１を有し、キャビティ１１の一方の端部１２に
配置される一方の口部の内面を規制するための第１のコ
ア型１７と、他方の端部１３に配置される他方の口部の
内面を規制するための第２のコア型１８と、キャビティ
１１の両端部１２，１３にそれぞれ開口し第２のノズル
１６の挿入穴１６Ａに連通する通路１４と、キャビティ
１１の分岐口部形成部１１Ａに連通する第１のノズル１
５の挿入穴１５Ａを備えている。なお、キャビティ１１
の両端部１２，１３にはそれぞれ前記段差部を規制する
ための突出部１２Ａ，１３Ａがそれぞれ設けられてい
る。As shown in FIG. 3, a split mold 10, which is a split mold, has a cavity 11 for restricting the outer surface of a resin tubular body, and is disposed at one end 12 of the cavity 11. The first core die 17 for regulating the inner surface of the one mouth portion, the second core die 18 for regulating the inner surface of the other mouth portion arranged at the other end portion 13, and the cavity 11 Of the first nozzle 1 that communicates with the branch opening forming portion 11A of the cavity 11 and the passage 14 that opens to both ends 12 and 13 of the cavity and communicates with the insertion hole 16A of the second nozzle 16.
5 insertion holes 15A are provided. The cavity 11
Both end portions 12 and 13 are provided with projecting portions 12A and 13A, respectively, for restricting the step portion.
【００１４】先ず、割型１０の一方の端部１２に第１の
コア型１７の先端部を突出させて配置するとともに、他
方の端部１３に第２のコア型１８の先端部を突出させて
配置して型閉じし、第１のノズル１５から所定量の第１
の溶融樹脂を分岐口部形成部１１Ａを介してキャビティ
１１内へ射出注入し、導入管２０より前記第１の溶融樹
脂の内部へ加圧流体を注入する。First, the tip end of the first core die 17 is arranged so as to project from one end 12 of the split die 10, and the tip end of the second core die 18 is projected at the other end 13. The first nozzle 15 and a predetermined amount of the first
The molten resin is injected and injected into the cavity 11 through the branch port forming portion 11A, and the pressurized fluid is injected into the inside of the first molten resin through the introduction pipe 20.
【００１５】一方、第２のノズル１６から第１の溶融樹
脂とは異種材料からなる第２の溶融樹脂を通路１４を介
して、一方の端部１２と第１のコア型１７とで形成され
た空隙部および他方の端部１３と第２のコア型１８とで
形成される空隙部にそれぞれ所定量だけ射出注入する。
前記溶融樹脂の射出注入は、型閉じ進行中または完了後
いずれの時期に開始してもよい。On the other hand, a second molten resin made of a material different from the first molten resin from the second nozzle 16 is formed by the one end 12 and the first core mold 17 through the passage 14. A predetermined amount is injected and injected into the gap and the gap formed by the other end 13 and the second core mold 18.
The injection injection of the molten resin may be started at any time during the mold closing process or after the completion.
【００１６】すると、前記第１の溶融樹脂はその内部に
注入された加圧流体の圧力で中空部２０が形成される
が、このときキャビティ１１内の空気は第１のコア型１
７の孔１７Ａおよび第２のコア型１８の孔１８Ａより外
部へ放出されるので前記中空部２０の形成が妨げられる
ことがなく、第１のコア型１７の先端面および前記第２
の溶融樹脂で形成された一方の口部となる部分の一端面
に当接して形成された境界面１９Ａで溶着されるととも
に、第２のコア型１８の先端面および前記第２の溶融樹
脂で形成された他方の口部となる部分の一端面に当接し
て形成された境界面１９Ｂで溶着されて中空の成形品Ｐ
1 が一体成形される。ついで、金型中で成形品Ｐ1 を冷
却したのち、型開きして成形品Ｐ1 を取り出し、前記境
界面１９Ａ，１９Ｂのバリをドリル等により切除する。Then, the hollow portion 20 is formed in the first molten resin by the pressure of the pressurized fluid injected therein, and the air in the cavity 11 at this time is the first core mold 1.
7 is discharged to the outside through the hole 17A of No. 7 and the hole 18A of the second core mold 18, so that the formation of the hollow portion 20 is not hindered, and the tip end surface of the first core mold 17 and the second core mold 17 are prevented.
Is welded at the boundary surface 19A formed by abutting on one end surface of a portion that is one of the mouth portions formed of the molten resin, and the tip surface of the second core mold 18 and the second molten resin A hollow molded product P welded at a boundary surface 19B formed by abutting one end surface of the other opening portion to be formed.
1 is integrally molded. Then, after cooling the molded article P 1 in the mold, the mold is opened demolding P 1, the interface 19A, the 19B burrs of ablating a drill or the like.
【００１７】次に本発明の他の実施例について説明す
る。Next, another embodiment of the present invention will be described.
【００１８】図５に示すように、分割形式の金型である
割型３０は、管状体の外面を規制するためのキャビティ
３１を有し、キャビティ３１の一方の端部３２に配置さ
れる一方の口部の内面を規制するための第１のコア型３
７と、他方の端部３３に配置される他方の口部の内面を
規制するための筒状カッタ３８Ａおよびその内部に配設
された第２のコア型３８と、キャビティ３１の一方の端
部３３に開口し第１のノズル３５の挿入穴３５Ａに連通
する第１の通路３４Ａと、キャビティ３１の他方の端部
３３に開口し第２のノズル３６の挿入穴３６Ａに連通す
る第２の通路３４Ｂとを備えている。As shown in FIG. 5, a split mold 30, which is a split mold, has a cavity 31 for restricting the outer surface of the tubular body, and is disposed at one end 32 of the cavity 31. First core mold 3 for regulating the inner surface of the mouth of the
7, a cylindrical cutter 38A for regulating the inner surface of the other mouth portion arranged at the other end portion 33, a second core die 38 arranged therein, and one end portion of the cavity 31. A first passage 34A that opens to 33 and communicates with the insertion hole 35A of the first nozzle 35, and a second passage that opens to the other end 33 of the cavity 31 and communicates with the insertion hole 36A of the second nozzle 36. 34B and.
【００１９】先ず、割型３０の一方の端部３２に第１の
コア型３７の先端部を突出させて配置するとともに他方
の端部３３に第２のコア型３８の先端部を突出させて配
置して型閉じし、一方の端部３２と第１のコア型３７と
で形成された空隙部へ第１のノズル３５から所定量の第
１の溶融樹脂を射出注入し、導入孔３７Ａより前記第１
の溶融樹脂の内部へ加圧流体を注入する。First, the tip portion of the first core die 37 is arranged so as to project from one end portion 32 of the split mold 30, and the tip portion of the second core mold 38 is projected toward the other end portion 33. After arranging and closing the mold, a predetermined amount of the first molten resin is injected and injected from the first nozzle 35 into the void formed by the one end 32 and the first core mold 37, and then introduced through the introduction hole 37A. The first
A pressurized fluid is injected into the molten resin of.
【００２０】一方、第２のノズル３６から他方の端部３
３と筒状カッタ３８Ａとで形成された空隙部へ第１の溶
融樹脂とは異種材料からなる第２の溶融樹脂を所定量だ
け射出注入する。On the other hand, from the second nozzle 36 to the other end 3
A predetermined amount of the second molten resin made of a material different from the first molten resin is injected and injected into the gap formed by 3 and the cylindrical cutter 38A.
【００２１】すると、前記第１の溶融樹脂はその内部に
注入された加圧流体の圧力で中空部４０が形成されてキ
ャビティ３１に沿って膨張し、第２のコア型３８の先端
面および筒状カッタ３８Ａの先端面に当接するとともに
前記第２の溶融樹脂で形成された他方の口部となる部分
の一端面に当接して形成された境界面３９で溶着されて
中空の成形品Ｐ2 が一体成形される。ついで、金型中で
成形品をＰ2 を冷却したのち、前記筒状カッタ３８Ａを
キャビティ３１側へ突出させることにより境界面３９の
バリ３９Ａを切除し、型開きして成形品Ｐ2 を取り出
す。Then, the first molten resin expands along the cavity 31 by forming the hollow portion 40 by the pressure of the pressurized fluid injected into the first molten resin, and the tip surface of the second core mold 38 and the cylinder. Hollow product P 2 welded at a boundary surface 39 formed by abutting on the tip end surface of the blade-shaped cutter 38A and abutting on one end surface of the other mouth portion formed of the second molten resin. Are integrally molded. Then, after the molded product in the mold was cooled P 2, the tubular cutter 38A excised burrs 39A of the boundary surface 39 by projecting into the cavity 31 side, taking out the molded article P 2 by opening the mold .
【００２２】上記各実施例で使用した割型にかえて、キ
ャビティの適宜部位に連通する樹脂逃げ用リセスを設け
た割型を用い、溶融樹脂の内部へ加圧流体を注入して中
空部を形成させたときの余剰の溶融樹脂を逃がすように
すると、成形品の中空率を向上させることができる。Instead of the split mold used in each of the above embodiments, a split mold provided with a resin escape recess communicating with an appropriate portion of the cavity was used to inject a pressurized fluid into the molten resin to form a hollow portion. If the excess molten resin formed is allowed to escape, the hollow rate of the molded product can be improved.
【００２３】このほか、（１）割型にスライド自在なス
ライドコア型を配設しておき、加圧流体の注入時に前記
スライドコア型をスライドさせてキャビティの容積を増
加させる、（２）溶融樹脂の内部へ注入する前は液体で
あるが注入後は気体となる加圧流体を使用して注入され
た加圧流体の圧力を高める、等の手段によっても中空率
を向上することができる。In addition, (1) a slide core mold which is slidable in a split mold is provided, and the volume of the cavity is increased by sliding the slide core mold when injecting a pressurized fluid, (2) melting The hollow ratio can also be improved by means such as increasing the pressure of the injected pressurized fluid using a pressurized fluid that is a liquid before being injected into the resin but becomes a gas after being injected.
【００２４】さらに、成形された成形品の冷却に際し、
成形品の中空部に孔をあける等の方法により、加圧流体
を成形品外へ導いて成形品中に加圧流体を流通させるこ
とにより、成形品の成形時間を短縮することができる。Further, in cooling the molded article,
The molding time of the molded product can be shortened by introducing the pressurized fluid to the outside of the molded product and circulating the pressurized fluid in the molded product by a method such as forming a hole in the hollow portion of the molded product.
【００２５】本発明により製造された樹脂製管状体は、
ポリエチレン、ポリプロピレン、ポリアミド、変性ポリ
フェニレンオキサイド、ポリブチレンテレフタレート、
その他、ＥＰＤＭなどエラストマー的性質を有する熱可
塑性合成樹脂材料からなり、自動車分野、電気製品分野
などでダクト、ホース、またはチューブとして使用され
る。なお、前記熱可塑性合成樹脂材料は、公知の補強充
填剤、難燃剤、顔料、安定剤、発泡剤を必要に応じて配
合して使用することもできる。The resin tubular body produced according to the present invention is
Polyethylene, polypropylene, polyamide, modified polyphenylene oxide, polybutylene terephthalate,
In addition, it is made of a thermoplastic synthetic resin material having an elastomeric property such as EPDM, and is used as a duct, hose, or tube in the fields of automobiles, electric appliances and the like. The thermoplastic synthetic resin material may be used by mixing known reinforcing fillers, flame retardants, pigments, stabilizers, and foaming agents as necessary.
【００２６】本発明において、異種材料とは、（１）ポ
レプロピレンとポリエチレンなど、材料自体の異なる異
種材料、（２）ポリプロピレンとフィラーを混入したポ
リプロピレンなど、主体となる材料は同一であるが性質
の異なる異種材料、（３）高密度ポリエチレンと低密度
ポリエチレンなど広義の材料名は同一であるが性質の異
なる異種材料、（４）無着色ポリプロピレンと着色した
ポリプロピレンなど、単に色の異なる異種材料が適用で
きる。In the present invention, the different materials are (1) different materials having different materials such as polypropylene and polyethylene, and (2) the same main materials such as polypropylene and polypropylene mixed with a filler, but their properties are the same. Different materials of different types, (3) High-density polyethylene and low-density polyethylene have the same material name in a broad sense but different properties, (4) Uncolored polypropylene and colored polypropylene. Applicable.
【００２７】また、本発明において複数の異種材料と
は、上記のように、材料自体、添加剤、材料製法などの
違いにより物理的また化学的性質の異なる材料を適宜に
組合わせた２種または３種以上の異種材料である。Further, in the present invention, a plurality of different materials means two kinds of materials which are appropriately combined with each other having different physical or chemical properties depending on the difference in the material itself, the additive, the manufacturing method of the material, or the like, as described above. Three or more different materials.
【００２８】[0028]
【発明の効果】本発明は、上述のとおり構成されている
ので、次に記載するような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００２９】複数の異種材料からなる樹脂製管状体を歩
留り良く一体成形することができるとともに、コア型に
より成形品の少くとも一部の内面の形状、寸法が規制さ
れるため前記成形品の少くとも一部の内面の形状、寸法
が高精度である樹脂製管状体を簡単に製造することがで
きる。A plurality of resin-made tubular bodies made of different materials can be integrally molded with a good yield, and at least a part of the inner surface of the molded product is restricted in shape and size by the core mold, so that the molded product can be manufactured in a small amount. In addition, it is possible to easily manufacture a resin tubular body in which the shape and dimensions of a part of the inner surface are highly accurate.
【図１】本発明によって製造された樹脂製管状体の一例
である自動車用吸気ダクトの斜視図である。FIG. 1 is a perspective view of an automobile air intake duct, which is an example of a resin tubular body manufactured according to the present invention.
【図２】図１に示す自動車用吸気ダクトの断面図であ
る。FIG. 2 is a cross-sectional view of the automobile air intake duct shown in FIG.
【図３】本発明の一実施例を示し、型閉じした割型のキ
ャビティの複数の部位にそれぞれ異種材料からなる溶融
樹脂を射出注入する工程の説明図である。FIG. 3 is an explanatory view of a step of injecting a molten resin made of different materials into a plurality of portions of a cavity of a split mold which is closed, showing an embodiment of the present invention.
【図４】図３に示す工程後、キャビティ内の溶融樹脂の
内部へ加圧流体を注入して中空部を形成させて隣接する
他の溶融樹脂との境界面を溶着して中空の成形品を一体
成形する工程の説明図である。FIG. 4 is a hollow molded product obtained by injecting a pressurized fluid into the molten resin in the cavity to form a hollow portion after the step shown in FIG. 3 and welding the boundary surface with another adjacent molten resin. It is explanatory drawing of the process of integrally molding.
【図５】本発明の他の実施例を示し、型閉じした割型の
キャビティ内の複数の部位にそれぞれ異種材料からなる
溶融樹脂を射出注入する工程の説明図である。FIG. 5 shows another embodiment of the present invention, and is an explanatory view of a step of injecting and injecting a molten resin made of a different material into a plurality of portions in a cavity of a split mold which is closed.
【図６】図５に示す工程後、キャビティ内の溶融樹脂の
内部へ加圧流体を注入して中空部を形成させて隣接する
溶融樹脂の境界面を溶着して成形品を一体成形する工程
の説明図である。6 is a step of injecting a pressurized fluid into the molten resin in the cavity to form a hollow portion after the step shown in FIG. 5 and welding a boundary surface between adjacent molten resins to integrally form a molded product. FIG.
１ 管状本体部 ２ 一方の口部 ３ 他方の口部 ４ 分岐口部 ５Ａ，５Ｂ 境界面 １０，３０ 割型 １１，３１ キャビティ １２，３２ 一方の端部 １３，３３ 他方の端部 １４ 通路 １５，３５ 第１のノズル １６，３６ 第２のノズル １７，３７ 第１のコア型 １８，３８ 第２のコア型 １９Ａ，１９Ｂ，３９ 境界面 ２０，４０ 中空部 Ｐ1 ，Ｐ2 成形品DESCRIPTION OF SYMBOLS 1 Tubular main body part 2 One mouth part 3 The other mouth part 4 Branching mouth parts 5A, 5B Boundary surface 10, 30 Split mold 11, 31 Cavity 12, 32 One end part 13, 33 The other end part 14 Passage 15, 35 first nozzle 16, 36 the second nozzle 17, 37 the first core type 18 and 38 second core type 19A, 19B, 39 boundary surface 20 and 40 the hollow portion P 1, P 2 moldings
Claims (1)
された樹脂製管状体の製造方法であって、 前記樹脂製管状体の外周面を規制するキャビティを有す
る分割形式の金型を、前記キャビティ内に少くとも一つ
のコア型を突出させて型閉じし、前記キャビティ内の前
記コア型との間の空隙部を含む複数部位に異種材料から
なる複数の溶融樹脂をそれぞれ射出注入し、その内の少
くとも一つの溶融樹脂の内部へ加圧流体を注入して中空
部を形成し、前記複数の溶融樹脂の境界面を溶着させて
中空の成形品を一体成形したのち、前記成形品を金型内
で冷却することを特徴とする樹脂製管状体の製造方法。1. A method of manufacturing a resin-made tubular body in which parts made of a plurality of different materials are integrally molded, wherein a split-type mold having a cavity for regulating an outer peripheral surface of the resin-made tubular body is provided. At least one core mold is projected into the cavity to close the mold, and a plurality of molten resins made of different materials are respectively injected and injected into a plurality of portions including a void portion between the core mold and the cavity, A pressurized fluid is injected into the inside of at least one of the molten resins to form a hollow portion, the boundary surfaces of the plurality of molten resins are welded together, and a hollow molded article is integrally molded. A method for manufacturing a resin-made tubular body, which comprises cooling in a mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4330033A JPH06155509A (en) | 1992-11-16 | 1992-11-16 | Production of resin tubular body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4330033A JPH06155509A (en) | 1992-11-16 | 1992-11-16 | Production of resin tubular body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06155509A true JPH06155509A (en) | 1994-06-03 |
Family
ID=18228026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4330033A Pending JPH06155509A (en) | 1992-11-16 | 1992-11-16 | Production of resin tubular body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06155509A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08140881A (en) * | 1994-11-22 | 1996-06-04 | Mitsubishi Gas Chem Co Inc | Synthetic resin made shower molding and its molding |
| JP2002011749A (en) * | 2000-04-28 | 2002-01-15 | Mitsubishi Engineering Plastics Corp | Method and apparatus for injection-molding molded article having hollow part |
| JP2007276224A (en) * | 2006-04-05 | 2007-10-25 | It Techno Kk | Cooling structure of arc-shaped core mold and method for forming arc-shaped cooling water hole in the core mold |
| WO2017102843A1 (en) * | 2015-12-18 | 2017-06-22 | Kautex Textron Gmbh & Co. Kg | Injection-moulding device for producing multi-component mouldings and method for producing multi-component mouldings |
| JP2018062061A (en) * | 2016-10-11 | 2018-04-19 | タイガースポリマー株式会社 | Method for producing tubular resin molded body |
| JP2020082645A (en) * | 2018-11-30 | 2020-06-04 | 横浜ゴム株式会社 | Production method of resin pipe |
-
1992
- 1992-11-16 JP JP4330033A patent/JPH06155509A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08140881A (en) * | 1994-11-22 | 1996-06-04 | Mitsubishi Gas Chem Co Inc | Synthetic resin made shower molding and its molding |
| JP2002011749A (en) * | 2000-04-28 | 2002-01-15 | Mitsubishi Engineering Plastics Corp | Method and apparatus for injection-molding molded article having hollow part |
| JP4553512B2 (en) * | 2000-04-28 | 2010-09-29 | 三菱エンジニアリングプラスチックス株式会社 | Injection molding method for molded product having hollow part |
| JP2007276224A (en) * | 2006-04-05 | 2007-10-25 | It Techno Kk | Cooling structure of arc-shaped core mold and method for forming arc-shaped cooling water hole in the core mold |
| WO2017102843A1 (en) * | 2015-12-18 | 2017-06-22 | Kautex Textron Gmbh & Co. Kg | Injection-moulding device for producing multi-component mouldings and method for producing multi-component mouldings |
| CN108698281A (en) * | 2015-12-18 | 2018-10-23 | 考特克斯·特克斯罗恩有限公司及两合公司 | Injection moulding apparatus for producing multicomponent molded part and the method for producing multicomponent molded part |
| CN108698281B (en) * | 2015-12-18 | 2019-12-06 | 考特克斯·特克斯罗恩有限公司及两合公司 | Injection molding device for producing multicomponent molded parts and method for producing multicomponent molded parts |
| US11014278B2 (en) | 2015-12-18 | 2021-05-25 | Kauten Textron Gmbh & Co. Kg | Injection-molding device for producing multi component moldings and method for producing multi-component moldings |
| JP2018062061A (en) * | 2016-10-11 | 2018-04-19 | タイガースポリマー株式会社 | Method for producing tubular resin molded body |
| JP2020082645A (en) * | 2018-11-30 | 2020-06-04 | 横浜ゴム株式会社 | Production method of resin pipe |
| US11453150B2 (en) | 2018-11-30 | 2022-09-27 | The Yokohama Rubber Co., Ltd. | Method for manufacturing resin pipe |
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