JPH03112618A - Manufacture of multi-layer tube joint - Google Patents
Manufacture of multi-layer tube jointInfo
- Publication number
- JPH03112618A JPH03112618A JP25095889A JP25095889A JPH03112618A JP H03112618 A JPH03112618 A JP H03112618A JP 25095889 A JP25095889 A JP 25095889A JP 25095889 A JP25095889 A JP 25095889A JP H03112618 A JPH03112618 A JP H03112618A
- Authority
- JP
- Japan
- Prior art keywords
- outer layer
- layer
- mold
- molding
- reinforcing material
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000012778 molding material Substances 0.000 claims abstract description 47
- 239000012779 reinforcing material Substances 0.000 claims abstract description 23
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 13
- 238000001746 injection moulding Methods 0.000 abstract description 20
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 13
- 229920002530 polyetherether ketone Polymers 0.000 description 13
- 229920005989 resin Polymers 0.000 description 13
- 239000011347 resin Substances 0.000 description 13
- 239000003365 glass fiber Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000000835 fiber Substances 0.000 description 8
- 239000004697 Polyetherimide Substances 0.000 description 5
- 239000004721 Polyphenylene oxide Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 229920001601 polyetherimide Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 150000002825 nitriles Chemical class 0.000 description 4
- 229920002492 poly(sulfone) Polymers 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229920004695 VICTREX™ PEEK Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 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
- 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
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、給水管、給湯管などを接続するために用いら
れる多層管継手の製造方法に関し、詳しくは内層と外層
とを異なる熱可塑性樹脂成形材料で成形した多層管継手
の製造方法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing a multilayer pipe joint used for connecting water supply pipes, hot water supply pipes, etc. The present invention relates to a method of manufacturing a multilayer pipe joint molded with a molding material.
（従来の技術）
合成樹脂製の管継手において、外層と内層とを異なる樹
脂で成形することにより種々の性能を向上することがで
きる。(Prior Art) In a synthetic resin pipe joint, various performances can be improved by molding the outer layer and the inner layer using different resins.
例えば、液体と接する内層は耐熱性、耐熱水性、耐薬品
性等に優れた性質を有する樹脂からなる成形材料にて成
形し、外部に露出しかつ外部からの荷重を受は易い外層
は耐衝撃性、耐候性等に優れた樹脂からなる成形材料に
て成形することが考えられる。For example, the inner layer that comes into contact with liquid is molded with a resin molding material that has excellent heat resistance, hot water resistance, chemical resistance, etc., and the outer layer that is exposed to the outside and easily receives external loads is impact resistant. It is conceivable to use a molding material made of resin that has excellent properties such as hardness and weather resistance.
このような外層と内層とを有する多層構造の管継手を製
造するにあたって、外層を成形した後、この外層を二次
射出成形する金型にインサートし、この状態で内層用の
成形材料を射出すると、内層用の成形材料の熱収縮によ
って外層との間でずれを生じ、そのため内外層間の密着
性が悪く、また内層用成形材料の射出圧によって外層に
クラックを生じるおそれがある。When manufacturing a pipe joint with a multilayer structure having such an outer layer and an inner layer, after the outer layer is molded, this outer layer is inserted into a mold for secondary injection molding, and in this state, the molding material for the inner layer is injected. The heat shrinkage of the molding material for the inner layer causes misalignment between the inner layer and the outer layer, resulting in poor adhesion between the inner and outer layers, and the injection pressure of the inner layer molding material may cause cracks in the outer layer.
そこで、例えば、特開昭６ｌ−１８９９Ｈ号公報には、
外層を成形した後、外層を二次射出成形する金型にイン
サートすると共に、外層の外面と金型内面との間に二次
射出する内層の成形収縮ヱに千目当する隙間を設ける技
術が提案されている。この方法によれば、内層の成形収
縮に追従して外層が隙間内で収縮するこ、とで上記問題
をある程度解決することはできる。Therefore, for example, in Japanese Patent Application Laid-Open No. 61-1899H,
After the outer layer is molded, the outer layer is inserted into a mold for secondary injection molding, and at the same time a gap is created between the outer surface of the outer layer and the inner surface of the mold to accommodate the molding shrinkage of the inner layer that will be secondly injected. Proposed. According to this method, the above problem can be solved to some extent by causing the outer layer to shrink within the gap following the molding shrinkage of the inner layer.
（発明が解決しようとする課題）
一般に、多層管継手の外層は強度が要求されるために、
外層用成形材料として剛性の高いものが用いられること
が多いが、このような成形材料を用いて上記方法に従っ
て多層管継手を製造すると、剛性の高い成形材料は一般
に伸縮性が悪いために内層用成形材料の二次射出圧によ
ってクラックを生じてしまう。(Problems to be Solved by the Invention) Generally, the outer layer of a multilayer pipe joint is required to have strength.
A highly rigid molding material is often used for the outer layer, but when a multilayer pipe fitting is manufactured using such a molding material according to the above method, the highly rigid molding material generally has poor elasticity and is therefore used for the inner layer. Cracks occur due to the secondary injection pressure of the molding material.
この外層のクラックを防止するために二次射出圧を下げ
ていくと、内層に圧不部（成形材料が存在しない部分）
を生じてしまうという欠点がある。When the secondary injection pressure is lowered to prevent cracks in the outer layer, the inner layer becomes depressed (a part where no molding material is present).
It has the disadvantage of causing
さらに、上記方法においては、外層と内層との熱収縮率
が大きく異なるために、密着性が悪いという問題をも有
している。Furthermore, the above method also has the problem of poor adhesion because the thermal shrinkage rates of the outer layer and the inner layer are significantly different.
従って、上記方法によって得られた多層管継手は、踏み
付けなどの外力を受けると容易に割れ易く、また内層の
厚みを厚くしないと管継手内が負圧になった際に内層が
内部へ折れて変形し管継手内が閉塞されるおそれがある
。また、この管閉塞の問題をなくすために内層の厚みを
厚くすると、比較的高価な樹脂を多量に用いることにな
ってコスト高となる。Therefore, the multilayer pipe fitting obtained by the above method is easily broken when subjected to external force such as being stepped on, and if the inner layer is not thick, the inner layer may break inward when negative pressure is generated inside the pipe fitting. There is a risk of deformation and blockage of the inside of the pipe joint. Furthermore, if the thickness of the inner layer is increased in order to eliminate this problem of tube clogging, a large amount of relatively expensive resin will be used, resulting in high costs.
本発明は、かかる実状に着目して成されたものであり、
高価な樹脂を多量に用いることなく内外層間の密着性及
び耐衝撃性等の機械的強度を上げることができる多層管
継手の製造方法を提供することを目的とする。The present invention has been made by focusing on such actual situation,
It is an object of the present invention to provide a method for manufacturing a multilayer pipe joint that can improve mechanical strength such as adhesion between inner and outer layers and impact resistance without using a large amount of expensive resin.
（課題を解決するための手段）
本発明の多層管継手の製造方法は、異なる種類の熱可塑
性樹脂成形材料を射出して円筒状の外層と内層をそれぞ
れ成形する多層管継手の製造方法において、外層と内層
用の成形材料のうち少なくとも一方に補強材が配合され
ており、補強材が配合された成形材料を射出した後、池
の成形材料を射出することを特徴としており、そのこと
により上記目的が達成される。(Means for Solving the Problems) The method for manufacturing a multilayer pipe joint of the present invention is a method for manufacturing a multilayer pipe joint in which a cylindrical outer layer and an inner layer are respectively molded by injecting different types of thermoplastic resin molding materials. A reinforcing material is blended into at least one of the molding materials for the outer layer and the inner layer, and after the molding material blended with the reinforcing material is injected, the molding material for the pond is injected, thereby achieving the above-mentioned The purpose is achieved.
以下に、本発明を図面を参照しながら説明する。The present invention will be explained below with reference to the drawings.
第１図は本発明の一例を示し、二層管継手の製造方法の
概略を示したものである。FIG. 1 shows an example of the present invention, and shows an outline of a method for manufacturing a two-layer pipe joint.
まず第１図（ａ）に示すように、外層射出成形用外金型
３と外層射出成形用内金型３′とを用いて円筒状の外層
ｌを射出成形する。この外層１を形成する成形材料は、
熱可塑性樹脂に補強材が配合されたものを用いる。次に
、この外金型３より外層ｌを取り出し、−吹成形によっ
て生じたランナーに相当する部分や外層ｌの両端部を切
削する。First, as shown in FIG. 1(a), a cylindrical outer layer 1 is injection molded using an outer mold 3 for injection molding the outer layer and an inner mold 3' for the injection molding the outer layer. The molding material forming this outer layer 1 is
A thermoplastic resin containing a reinforcing material is used. Next, the outer layer 1 is taken out from the outer mold 3, and the portion corresponding to the runner produced by the blow molding and both ends of the outer layer 1 are cut.
次に、第１図（ｂ）に示すように、外層１を再び外層射
出成形用外金型３に組み込み、第１図（Ｃ）に示すよう
に、この時、内金型として外層射出成形用内金型３′よ
りも内層２の肉厚分だけ小径の内層射出成形用内金型５
を用い、前記外層１の内周側に内層用成形材料を射出し
て内層２を成形する。内層用成形材料は、熱可塑性樹脂
あるいは熱可塑性樹脂に補強材を配合したものを用いる
ことができる。こうして、内層２と外層ｌとを有する二
層構造の管継手Ａを得ることができる。Next, as shown in FIG. 1(b), the outer layer 1 is assembled again into the outer mold 3 for injection molding the outer layer, and as shown in FIG. 1(C), the outer layer injection molding is performed as the inner mold. An inner mold 5 for inner layer injection molding whose diameter is smaller than that of the inner mold 3' by the thickness of the inner layer 2.
The inner layer 2 is molded by injecting the molding material for the inner layer onto the inner peripheral side of the outer layer 1. As the molding material for the inner layer, a thermoplastic resin or a thermoplastic resin mixed with a reinforcing material can be used. In this way, a pipe joint A having a two-layer structure having an inner layer 2 and an outer layer 1 can be obtained.
上記内層用の成形材料に用いられる熱可塑性樹脂として
は、ポリエーテルエーテルケトン（以下、ＰＥＥにとい
う）、又は、ポリエーテルニトリルが好ましく用いられ
る。このＰＥＥＫは、ＩＣ１社が開発した特殊エンジニ
アリングプラスチックであり、その融点は３３４℃であ
る。ＰＥＥＫは軽量であって、耐熱性、耐熱水性、耐薬
品性等の諸物性に優れている。ＰＥＥＫの市販品として
は、ＶＩＣＴＲＥＸ ＰＥＥＫ （Ｉｃ１社商標）があ
げられる。また、該成形材料にはＰＥＥＫを主成分とし
、他の添加剤が含有されてもよい。また、ポリエーテル
ニトリルとは、出光興産側が開発した特殊エンジニアリ
ングプラスチックであり、その融点は３４０°Ｃである
。ポリエーテルニトリルは軽量であって耐熱性、耐熱水
性、耐薬品性等の諸物性に優れている。ポリエーテルニ
トリルは、以下の繰り返し単位を有した構造をもつ。As the thermoplastic resin used in the molding material for the inner layer, polyether ether ketone (hereinafter referred to as PEE) or polyether nitrile is preferably used. This PEEK is a special engineering plastic developed by IC1, and its melting point is 334°C. PEEK is lightweight and has excellent physical properties such as heat resistance, hot water resistance, and chemical resistance. A commercially available product of PEEK includes VICTREX PEEK (trademark of Ic1 Company). Further, the molding material contains PEEK as a main component and may contain other additives. Furthermore, polyether nitrile is a special engineering plastic developed by Idemitsu Kosan, and its melting point is 340°C. Polyether nitrile is lightweight and has excellent physical properties such as heat resistance, hot water resistance, and chemical resistance. Polyethernitrile has a structure having the following repeating units.
ポリエーテルニトリルの市販品としては、ＩＤ３００
（出光興産■商標）がある。A commercially available polyether nitrile product is ID300.
(Idemitsu Kosan trademark).
外層用の成形材料に用いられる熱可塑性樹脂としては、
例えば、ポリアミド、ポリエチレン、ポリプロピレン、
ポリブチレンテレフタレート、ポリ塩化ビニル、ポリア
セタール、ポリカーボネート、ポリエーテルスルフォン
、ポリフェニレンオキシド、ポリフェニレンスルフィド
、ポリスルホン、ポリエーテルイミド等があげられ、特
に、ポリエーテルイミド、ポリスルホン、ポリエーテル
スルフォン、ポリフェニレンスルフィドが好ましい。こ
れらの樹脂はＰＥＥＫ及びポリエーテルニトリルとの熱
融着性が優れており、また耐熱性、耐候性、耐圧性、耐
衝撃性も比較的優れており着色が可能である。Thermoplastic resins used as molding materials for the outer layer include:
For example, polyamide, polyethylene, polypropylene,
Examples include polybutylene terephthalate, polyvinyl chloride, polyacetal, polycarbonate, polyether sulfone, polyphenylene oxide, polyphenylene sulfide, polysulfone, and polyetherimide, with polyetherimide, polysulfone, polyether sulfone, and polyphenylene sulfide being particularly preferred. These resins have excellent heat fusion properties with PEEK and polyethernitrile, and also have relatively excellent heat resistance, weather resistance, pressure resistance, and impact resistance, and can be colored.
外層と内層用の成形材料のうち、補強材は少なくとも一
方に配合されればよいが、ｋ、１衝撃性を高めるために
少なくとも外層用成形材料に補強材が配合されているの
が好ましい。The reinforcing material may be blended in at least one of the molding materials for the outer layer and the inner layer, but it is preferable that the reinforcing material be blended in at least the molding material for the outer layer in order to improve the k,1 impact resistance.
上記補強材としては、例尤ば、ガラス繊維、炭素繊維、
ボロン繊維、炭化硅素繊維、アルミナ繊維、アモルファ
ス繊維、シリコン・チタン・炭素系繊維等の無機繊維、
アラミド繊維等の有機繊維があげられ、特にガラス繊維
が好ましい。これらは短繊維（繊維長は２〜３１ｍ１も
しくはそれ以下、繊維径は５〜２５μｌ程度が好ましい
）の形で使用され、実用性を損なわない範囲で添加され
る。Examples of the above-mentioned reinforcing materials include glass fiber, carbon fiber,
Inorganic fibers such as boron fibers, silicon carbide fibers, alumina fibers, amorphous fibers, silicon/titanium/carbon fibers,
Examples include organic fibers such as aramid fibers, and glass fibers are particularly preferred. These are used in the form of short fibers (preferably, the fiber length is 2 to 31 m1 or less, and the fiber diameter is about 5 to 25 μl), and added within a range that does not impair practicality.
また、外層及び内層用の成形材料には、補強のための他
の充填剤、着色剤、老化防止剤等が必要に応じて添加さ
れる。Further, other reinforcing fillers, colorants, anti-aging agents, etc. may be added to the molding materials for the outer and inner layers as necessary.
このようにして得られた管継手Ａは、外層ｌに補強材が
配合されているので、外層ｌの内周面には補強材の一部
が露出し、または補強材によって微細な凹凸が形成され
ている状態であり、この外層の内周面に内層用成形材料
を射出すると上記補強材の一部が内層用成形材Ｌ１内に
入った状態で固化するために、外層と内層とを良好に密
着させることができ、耐ブリスター性を向上し、かつ耐
衝撃性を向上することができる。In the pipe joint A obtained in this way, the reinforcing material is mixed in the outer layer L, so a part of the reinforcing material is exposed on the inner peripheral surface of the outer layer L, or fine irregularities are formed by the reinforcing material. When the molding material for the inner layer is injected onto the inner peripheral surface of the outer layer, a portion of the reinforcing material solidifies inside the molding material L1 for the inner layer, so that the outer layer and the inner layer are in a good condition. It is possible to bring the material into close contact with the material, improve blister resistance, and improve impact resistance.
特に、上記したように、流体と接する内層を補強材を含
まない成形材料で成形し、外層を補強材を含む成形材料
で成形することにより、外層の耐衝撃性をさらに向上す
ることができる。また、内層の樹脂を耐熱性、耐熱水性
、耐薬品性等に優れた熱可塑性樹脂、例えばＰＥＥＫ及
びポリエーテルニトリルを用いることにより、管継手の
耐熱性、耐熱水性等をさらに高めることができるもので
あり、そして、内層の成形材料には顔料を添加せず、外
層の成形材料に顔料を添加することにより、内層の物性
を低下させることなく管継手を自由に着色することがで
きる。In particular, as described above, by molding the inner layer in contact with the fluid with a molding material that does not contain a reinforcing material and molding the outer layer with a molding material that contains a reinforcing material, the impact resistance of the outer layer can be further improved. In addition, by using a thermoplastic resin with excellent heat resistance, hot water resistance, chemical resistance, etc., such as PEEK and polyethernitrile, as the inner layer resin, the heat resistance, hot water resistance, etc. of the pipe joint can be further improved. By adding a pigment to the molding material for the outer layer without adding pigment to the molding material for the inner layer, the pipe fitting can be freely colored without reducing the physical properties of the inner layer.
なお、本発明の多層管継手の製造方法は二層に限らず、
三層以上の多層管継手の製造方法にも適用できる。さら
に、多層管継手の形状は第１図（ｅ）に示したストレー
トタイプのものに限らず、エルボタイプのものにも適用
することができる。Note that the method for manufacturing the multilayer pipe joint of the present invention is not limited to two layers;
It can also be applied to the manufacturing method of multilayer pipe joints with three or more layers. Furthermore, the shape of the multilayer pipe joint is not limited to the straight type shown in FIG. 1(e), but can also be applied to an elbow type.
（実施例） 以下に本発明を実施例に基づいて具体的に説明する。(Example) The present invention will be specifically described below based on Examples.
大ｍ
第１図（ｄ）に示す多層管継手を多層射出成形機を用い
て成形した。Large m The multilayer pipe joint shown in Figure 1(d) was molded using a multilayer injection molding machine.
まず、ポリエーテルエーテルケトン（ＰＥＥＫ）にて内
層用のベレットを作成し、ポリエーテルイミドにガラス
繊維が３０％混合された成形材料にて外層用のベレット
を作成した。次に、第１図（ａ）に示したように、外層
射出成形用外金型３に外層用成形材料を供給して射出成
形を行い外層１を成形した。First, a pellet for the inner layer was made from polyetheretherketone (PEEK), and a pellet for the outer layer was made from a molding material containing 30% glass fiber mixed with polyetherimide. Next, as shown in FIG. 1(a), the outer layer molding material was supplied to the outer mold 3 for outer layer injection molding, and injection molding was performed to form the outer layer 1.
次に、得られた外層１のランナーに相当する部分と、内
層２が形成される外層１の両端部を切削した後、第１図
（ｂ）に示すように再び、外層射出成形用外金型３内に
セットした。次に、第１図（Ｃ）に示すように、内金型
として外層射出成形用内金型３′よりも内層２の肉厚分
だけ小径の内層射出成形用内金型５を用い、内外層間に
内層用成形材料を射出し、その後１８０°Ｃで１時間熱
処理し、ＰＥＥＫを結晶化させて多層管継手Ａを得た。Next, after cutting a portion of the obtained outer layer 1 corresponding to the runner and both ends of the outer layer 1 on which the inner layer 2 will be formed, the outer mold for injection molding of the outer layer is cut again as shown in FIG. 1(b). It was set in mold 3. Next, as shown in FIG. 1(C), an inner mold 5 for inner layer injection molding, which has a smaller diameter than the inner mold 3' for outer layer injection molding by the thickness of the inner layer 2, is used as the inner mold. A molding material for the inner layer was injected between the layers, and then heat treated at 180°C for 1 hour to crystallize PEEK to obtain a multilayer pipe joint A.
得られた多層管継手Ａの内外層２．１間の密着強度を測
定したところ２２０Ｋｇ／ｃＩ１１２であった。The adhesion strength between the inner and outer layers 2.1 of the obtained multilayer pipe fitting A was measured and found to be 220 Kg/cI112.
次に、この多層管継手Ａを用いて第２図に示すように、
一対の管４．４を接続し、この管４．４内に通湯（９５
℃Ｘ １（Ｈｇ／ａｍ） Ｌ、また外面を３５℃の水に
浸漬して耐ブリスター試験を行ったところ、５０００時
間後の密着力の低下は見られず、また管継手の閉塞状況
（ブリスター）も見られなかった。Next, using this multilayer pipe joint A, as shown in Fig. 2,
A pair of pipes 4.4 are connected, and hot water (95
℃X 1 (Hg/am) ) was also not seen.
なお、第２図中、６はスリットリング、７は袋ナツトで
ある。In addition, in FIG. 2, 6 is a slit ring, and 7 is a cap nut.
実ｉｆ伍」−
内層用の成形材料としてガラス繊維が３０重量％配合さ
れたＰＥＥＫを用い、外層用の成形材料としてガラス繊
維が３０重量％配合された芳香族ポリアミドを用いた以
外は、実施例１と同様にして多層管継手を得た。得られ
た多層管継手の内外層間の密着強度を測定したところ２
００Ｋｇ／ｃＩ１２であった。Example 5 - Example except that PEEK containing 30% by weight of glass fiber was used as the molding material for the inner layer, and aromatic polyamide containing 30% by weight of glass fiber was used as the molding material for the outer layer. A multilayer pipe joint was obtained in the same manner as in Example 1. The adhesion strength between the inner and outer layers of the obtained multilayer pipe joint was measured.2
00Kg/cI12.
また、実施例１と同様に耐ブリスター試験を行ったとこ
ろ、５０００時間後も密着力の低下は見られず、また管
継手のブリスターも見られなかった。Furthermore, when a blister resistance test was conducted in the same manner as in Example 1, no decrease in adhesion was observed even after 5000 hours, and no blisters were observed in the pipe joints.
爽丘丘主
内層用の成形材料として、ＰＥＥにの代わりにガラス繊
維が３０重量％配合されたポリサルホンを用いた以外は
、実施例１と同様にして多層管継手を得た。得られた多
層管継手の内外層間の密着強度を測定したところ３５０
にｇ／ｃ１１２であった。A multilayer pipe joint was obtained in the same manner as in Example 1, except that polysulfone containing 30% by weight of glass fiber was used instead of PEE as the molding material for the main inner layer. When the adhesion strength between the inner and outer layers of the obtained multilayer pipe joint was measured, it was 350.
g/c was 112.
また、実施例１と同様に耐ブリスター試験を行ったとこ
ろ、５０００時間後も密着力の低下は見られず、また管
継手のブリスターも見られなかった。Furthermore, when a blister resistance test was conducted in the same manner as in Example 1, no decrease in adhesion was observed even after 5000 hours, and no blisters were observed in the pipe joints.
之蝮五上
ＰＥＥにを射出して内層を成形し、その後ポリエーテル
イミドにガラス繊維が３０％混合された成形材料を射出
して外層を成形した以外は、実施例１と同様にして多層
管継手を得た。得られた多層管継手の内外層間の密着強
度を測定したところ５０Ｋｇ／ｃｌ１１２であり、実施
例１と比較して約半分の衝撃力で折損してしまった。A multilayer pipe was made in the same manner as in Example 1, except that the inner layer was molded by injecting PEE into PEE, and then the outer layer was molded by injecting a molding material containing 30% glass fiber mixed with polyetherimide. Got the fitting. The adhesion strength between the inner and outer layers of the obtained multilayer pipe joint was measured to be 50 kg/cl112, and it broke at about half the impact force as in Example 1.
埼蛛皿１
ＰＥＥＫを射出して内層を成形し、その後ガラス繊維が
３０重１％配合されたポリサルホンを射出して外層を成
形した以外は、実施例３と同様にして多層管継手を得た
。得られた多層管継手の内外層間の密着強度を測定した
ところ３０Ｋｇ／ｃｍ２以下であり、実施例３と比較し
て約半分の衝撃力で折損してしまった。Saitama Plate 1 A multilayer pipe joint was obtained in the same manner as in Example 3, except that PEEK was injected to mold the inner layer, and then polysulfone containing 30 weight 1% glass fiber was injected to mold the outer layer. . When the adhesion strength between the inner and outer layers of the obtained multilayer pipe joint was measured, it was less than 30 kg/cm2, and it broke with about half the impact force as in Example 3.
ルｍ
ポリエーテルイミドにガラス繊維が３０％混合された成
形材料を射出して管継手を得た。得られた多層管継手に
ついて、実施例１と同様に耐ブリスター試験を行ったと
ころ、管継手の内面が加水分解して強度の低下をきたし
、パツキン部分が折損した。A pipe joint was obtained by injecting a molding material containing 30% glass fiber mixed with polyetherimide. When the obtained multilayer pipe joint was subjected to a blister resistance test in the same manner as in Example 1, the inner surface of the pipe joint was hydrolyzed, resulting in a decrease in strength, and the packing portion was broken.
（発明の効果）
本発明は、補強材が配合された成形材料を射出した後、
他の成形材料を射出しているので、補強材のアンカー効
果によって内層と外層との密着強度を上げることができ
る。従って、密着性が低下することなく内層と外層の樹
脂を選択することが可能となり、例えば、外層用の樹脂
としては着色性、耐衝撃性等に憂れた樹脂を使用し、内
層用の樹脂としては耐熱性、耐熱水性、耐薬品性等に優
れた樹脂を使用することにより、管継手の性能を向上で
きると共に、特に高価な樹脂を多量に用いる必要もな（
なり比較的安価に製造することができる。(Effects of the invention) The present invention provides that after injecting a molding material containing a reinforcing material,
Since other molding materials are injected, the anchoring effect of the reinforcing material can increase the adhesion strength between the inner layer and the outer layer. Therefore, it is possible to select resins for the inner and outer layers without deteriorating adhesion. For example, the resin for the outer layer may be a resin with poor coloring properties or impact resistance, and the resin for the inner layer may be selected. By using resins with excellent heat resistance, hot water resistance, chemical resistance, etc., the performance of pipe fittings can be improved, and there is no need to use large amounts of particularly expensive resins.
Therefore, it can be manufactured relatively inexpensively.
４、 の。 な脱臼
第１図（ａ）〜（ｄ）は本発明の多層管継手の製造方法
一実施例を示す説明図、第２図は多層管継手の接続状態
を示す断面図である。4. of. Dislocation FIGS. 1(a) to 1(d) are explanatory diagrams showing one embodiment of the method for manufacturing a multilayer pipe joint of the present invention, and FIG. 2 is a sectional view showing a connected state of the multilayer pipe joint.
１・・・外層、２・・・内層、Ａ・・・多層管継手、３
・・・外層用射出成形用外金型、５・・・内層用射出成
形用内金型、３′・・・外層用射出成形用内金型。1...Outer layer, 2...Inner layer, A...Multilayer pipe joint, 3
... Outer mold for injection molding for outer layer, 5 -- Inner mold for injection molding for inner layer, 3' -- Inner mold for injection molding for outer layer.
以上that's all
Claims (1)
状の外層と内層をそれぞれ成形する多層管継手の製造方
法において、外層と内層用の成形材料のうち少なくとも
一方に補強材が配合されており、補強材が配合された成
形材料を射出した後、他の成形材料を射出することを特
徴とする多層管継手の製造方法。1. In a method for manufacturing a multilayer pipe joint in which a cylindrical outer layer and an inner layer are formed by injecting different types of thermoplastic resin molding materials, a reinforcing material is blended into at least one of the molding materials for the outer layer and the inner layer. A method for manufacturing a multilayer pipe joint, which comprises injecting a molding material containing a reinforcing material and then injecting another molding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25095889A JPH0796245B2 (en) | 1989-09-27 | 1989-09-27 | Manufacturing method of multilayer pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25095889A JPH0796245B2 (en) | 1989-09-27 | 1989-09-27 | Manufacturing method of multilayer pipe joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03112618A true JPH03112618A (en) | 1991-05-14 |
| JPH0796245B2 JPH0796245B2 (en) | 1995-10-18 |
Family
ID=17215542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25095889A Expired - Fee Related JPH0796245B2 (en) | 1989-09-27 | 1989-09-27 | Manufacturing method of multilayer pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796245B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257501A (en) * | 2008-04-17 | 2009-11-05 | Mirai Ind Co Ltd | Water/hot water supplying joint |
| JP2009257502A (en) * | 2008-04-17 | 2009-11-05 | Mirai Ind Co Ltd | Water/hot water supplying joint |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2451356C (en) * | 2001-06-29 | 2012-03-06 | Coloplast A/S | A catheter device |
-
1989
- 1989-09-27 JP JP25095889A patent/JPH0796245B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257501A (en) * | 2008-04-17 | 2009-11-05 | Mirai Ind Co Ltd | Water/hot water supplying joint |
| JP2009257502A (en) * | 2008-04-17 | 2009-11-05 | Mirai Ind Co Ltd | Water/hot water supplying joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0796245B2 (en) | 1995-10-18 |
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