JPS642048B2 - - Google Patents

Info

Publication number
JPS642048B2
JPS642048B2 JP9003884A JP9003884A JPS642048B2 JP S642048 B2 JPS642048 B2 JP S642048B2 JP 9003884 A JP9003884 A JP 9003884A JP 9003884 A JP9003884 A JP 9003884A JP S642048 B2 JPS642048 B2 JP S642048B2
Authority
JP
Japan
Prior art keywords
mold
core mold
core
pressure
resin
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
Application number
JP9003884A
Other languages
Japanese (ja)
Other versions
JPS60232918A (en
Inventor
Masahiko Mukai
Hirokazu Kitsutaka
Shigeru Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Boseki Co Ltd
Original Assignee
Nitto Boseki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nitto Boseki Co Ltd filed Critical Nitto Boseki Co Ltd
Priority to JP9003884A priority Critical patent/JPS60232918A/en
Publication of JPS60232918A publication Critical patent/JPS60232918A/en
Publication of JPS642048B2 publication Critical patent/JPS642048B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/42Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/443Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/261Moulds having tubular mould cavities
    • B29C45/2612Moulds having tubular mould cavities for manufacturing tubular articles with an annular groove
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles
    • B29L2023/22Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Injection Moulding 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、ガラス繊維、ボロン繊維、有機繊維
等の繊維で強化された強化プラスチツク製の管継
手、特にL字管、T字管等の曲管継手類をレジン
インジエクシヨン法により製造する方法に関す
る。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to pipe joints made of reinforced plastic reinforced with fibers such as glass fibers, boron fibers, and organic fibers, particularly bent pipes such as L-shaped pipes and T-shaped pipes. The present invention relates to a method of manufacturing joints by a resin injection method.

従来の技術 従来より強化プラスチツクの管継手が知られて
おり、この管継手の製造方法は、通常ハンドレイ
アツプ法(手積成形法)が殆どである。ハンドレ
イアツプ法は手作業であるため、能率が悪く、熟
練を要し、しかも均質な成形品が得難く外観も悪
い等の問題があつた。一方、強化プラスチツク成
形品の製造方法として、雄型と雌型とを用い、両
者間の空隙部に繊維強化材を装着した後合成樹脂
液を圧入するレジンインジエクシヨン法が知られ
ている。このレジンインジエクシヨン法は樹脂充
填が確実で、かつ美麗な外観の成形品を作ること
ができる利点があるが、脱型、特に雄型の脱型に
問題があり、用途が限られ管継手の成形には用い
られていなかつた。若し、レジンインジエクシヨ
ン法を管継手の成形に適用しようとする場合、管
継手が直線形状の場合には雄型(芯型)を成形さ
れた管継手の一端から一方向に引き出して何とか
脱型することができるが、L,T,Y,U,十字
等の形状をしている所謂曲管継手の場合には、一
体構造の芯型では脱型できず、芯型を多数の分割
型としなければならない。多数の分割型の芯型は
その組立、分解等の作業が非常に繁雑で生産性を
向上させることが困難であり、しかもこの分割型
の芯型を用いてレジンインジエクシヨン法の加圧
成形を行つた場合、芯型の接続部に樹脂液が入り
込み易く、芯型の分解脱型が困難となつたり成形
品内面のバリ取り仕上げを施さねばならない。こ
のような問題点のため、現実には曲管継手の製造
にレジンインジエクシヨン法は使用されていなか
つた。
PRIOR ART Pipe joints made of reinforced plastics have been known for a long time, and the manufacturing method for these pipe joints is usually a hand lay-up method (hand molding method). Since the hand lay-up method is a manual process, it is inefficient, requires skill, and has problems such as difficulty in obtaining homogeneous molded products and poor appearance. On the other hand, as a method for manufacturing reinforced plastic molded products, a resin injection method is known in which a male mold and a female mold are used, a fiber reinforcing material is attached to the gap between the molds, and then a synthetic resin liquid is press-fitted. This resin injecting method has the advantage of ensuring resin filling and making molded products with a beautiful appearance, but there are problems with demolding, especially of male molds, which limits its use and makes it suitable for pipe fittings. It was not used for molding. When trying to apply the resin injecting method to the molding of pipe fittings, if the pipe fitting has a straight shape, it is necessary to pull out the male mold (core mold) in one direction from one end of the molded pipe joint. However, in the case of so-called curved pipe joints that have shapes such as L, T, Y, U, cross, etc., it is not possible to remove the mold with a core mold of integral structure, and the core mold must be divided into many parts. It must be made into a mold. The assembly and disassembly of many split-type core molds is extremely complicated, making it difficult to improve productivity. If this is done, the resin liquid tends to enter the connecting part of the core mold, making it difficult to disassemble and remove the core mold, and the inner surface of the molded product must be finished to remove burrs. Because of these problems, the resin injection method has not actually been used to manufacture curved pipe joints.

発明の目的 本発明はかかる現状に鑑みなされたもので、管
継手の生産性及び品質を向上させるとともに、管
の接続手段として有効な形状となる継手内面の凹
状部や凸状部を持つた管継手を極わて容易に成形
することの可能な強化プラスチツク管継手の製造
法を提供することを目的とする。
Purpose of the Invention The present invention has been made in view of the current situation, and it aims to improve the productivity and quality of pipe joints, and to improve the productivity and quality of pipe joints. An object of the present invention is to provide a method for manufacturing a reinforced plastic pipe joint that allows the joint to be formed extremely easily.

発明の構成 本発明は外型と芯型とを用いてレジンインジエ
クシヨン法により管継手を成形する方法であり、
外型としては剛性を有する二分割以上の割り型を
使用し、芯型としては、一体構造の中空弾性体を
使用する。この芯型は内部の中空部に作用する圧
力により伸縮し、かつ常圧で保形性を有し、しか
も中空部に適当な圧力を加えると、樹脂の射出圧
力に耐える剛性を発揮しうるものである。外型と
芯型との間の空隙部に繊維強化材を装着した後、
芯型の中空部に加圧流体を供給して該中空部内を
一定圧に保持し芯型に必要な剛性を持たせる。こ
の状態で、前記外型と芯型との空隙部に合成樹脂
液を圧入して繊維強化材を合成樹脂液とを一体化
し、硬化させる。その後、前記芯型の中空部内圧
力を常圧もしくは負圧として収縮させ、且つ芯型
の可撓性を利用して成形品から引き出し、脱型す
る。かくして、複雑な形状の管継手がレジンイン
ジエクシヨン法により、かつ一体構造の芯型を用
いて製造できる。
Structure of the Invention The present invention is a method of molding a pipe joint by a resin injection method using an outer mold and a core mold,
As the outer mold, a rigid split mold having two or more parts is used, and as the core mold, a hollow elastic body having an integral structure is used. This core mold expands and contracts with the pressure applied to the internal hollow part, has shape retention properties at normal pressure, and can exhibit rigidity that can withstand resin injection pressure when an appropriate pressure is applied to the hollow part. It is. After installing the fiber reinforcement material in the gap between the outer mold and the core mold,
Pressurized fluid is supplied to the hollow part of the core mold to maintain the inside of the hollow part at a constant pressure so that the core mold has the necessary rigidity. In this state, a synthetic resin liquid is press-fitted into the gap between the outer mold and the core mold to integrate the fiber reinforcing material with the synthetic resin liquid and harden it. Thereafter, the pressure inside the hollow part of the core mold is reduced to normal pressure or negative pressure, and the core mold is pulled out from the molded product by utilizing its flexibility and removed from the mold. In this way, pipe fittings with complex shapes can be manufactured by the resin injection method and by using a core mold of integral structure.

実施例 以下、本発明の実施例を図面に基づいて説明す
る。第1図〜第3図は本発明をL字形管継手の成
形に適用した例を示す図である。同図において、
1,2は剛性を有する外型(雄型)を構成する二
つの割り型、即ち下型、上型であり、これらは成
形されるべき管継手の円周中央部で上下に二分割
されている。なお、成形される管継手の形状に依
つては三分割以上の割り型が用いられてもよい。
下型1と上型2との接合面の一方(本実施例では
下型1側)には樹脂充填用キヤビテイに沿つて厚
さ1〜10mm程度の耐薬品性のあるゴム状弾性体7
が配置され、他方(上型2側)にはゴム状弾性体
7に圧着可能な形状の突起部8が設けられてい
る。ゴム状弾性体7と突起部8とはキヤビテイ内
に圧入した樹脂の流出を防止する。なお、ゴム状
弾性体7と突起部8との配置は逆としてもよい。
下型1,上型2の内面の端部近傍にも、樹脂流出
防止用の耐薬品性のあるゴム状弾性体12が円周
方向に配置されている。なお、このゴム状弾性体
12は下型1,上型2に保持させるかわりに、後
述する芯型4の外周に環状に形成してもよく、或
いは双方に設けてもよい。上型2には1個所以上
の樹脂注入口6が形成されている。樹脂注入口6
は下型1に設けてもよく、更には上型,下型の双
方に設けてもよい。
Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. FIGS. 1 to 3 are diagrams showing an example in which the present invention is applied to molding an L-shaped pipe joint. In the same figure,
1 and 2 are two split molds that constitute a rigid outer mold (male mold), namely a lower mold and an upper mold, and these are divided into upper and lower halves at the center of the circumference of the pipe joint to be molded. There is. Note that, depending on the shape of the pipe joint to be molded, a mold divided into three or more parts may be used.
On one of the joint surfaces between the lower mold 1 and the upper mold 2 (lower mold 1 side in this example), a chemical-resistant rubber-like elastic body 7 with a thickness of about 1 to 10 mm is placed along the resin filling cavity.
The other side (upper die 2 side) is provided with a protrusion 8 having a shape that can be press-fitted to the rubber-like elastic body 7. The rubber-like elastic body 7 and the projection 8 prevent the resin press-fitted into the cavity from flowing out. Note that the arrangement of the rubber-like elastic body 7 and the protrusion 8 may be reversed.
Chemical-resistant rubber-like elastic bodies 12 for preventing resin outflow are also arranged in the circumferential direction near the ends of the inner surfaces of the lower mold 1 and the upper mold 2. Note that instead of being held by the lower mold 1 and the upper mold 2, the rubber-like elastic body 12 may be formed in an annular shape around the outer periphery of the core mold 4, which will be described later, or may be provided on both. The upper mold 2 has one or more resin injection ports 6 formed therein. Resin injection port 6
may be provided on the lower mold 1, or may be provided on both the upper mold and the lower mold.

芯型4は一体構造の中空弾性体で構成される。
この中空弾性体は内圧の作用により伸縮し、かつ
常圧では保形性を有し、さらに適当な内圧を受け
た時、圧入樹脂圧に耐える剛性を発揮しうるもの
であれば良く、例えば肉厚4〜6mmのゴム中空体
が好適である。なお、肉厚4〜6mmを選んだの
は、これより薄いと常圧時の保形性及び成形時の
剛性が不足して成形管継手の肉厚が不均一にな
り、またこれより厚いと加圧力、減圧力を高くし
ないと脱型が困難になるためである。但し、局部
的に厚くすることは、脱型に殆ど影響しないので
差支えない。芯型4は端部にフランジ13を有
し、かつ端部近傍の外周面に環状の凸部14を有
している。一方、凸部14に向い合う外型の内面
には凹部15が形成されている。
The core mold 4 is composed of a hollow elastic body having an integral structure.
This hollow elastic body may be any material as long as it expands and contracts under the action of internal pressure, has shape retention under normal pressure, and exhibits rigidity to withstand the pressure of press-fit resin when subjected to appropriate internal pressure. A rubber hollow body with a thickness of 4 to 6 mm is suitable. The wall thickness of 4 to 6 mm was chosen because if it is thinner than this, the shape retention under normal pressure and rigidity during molding will be insufficient, resulting in uneven wall thickness of the molded pipe fitting. This is because demolding becomes difficult unless the applied pressure and reduced pressure are increased. However, locally increasing the thickness has no effect on demolding, so there is no problem. The core mold 4 has a flange 13 at the end, and an annular convex portion 14 on the outer peripheral surface near the end. On the other hand, a recess 15 is formed on the inner surface of the outer mold facing the protrusion 14 .

次に上記外型及び芯型を用いた管継手の成形方
法を説明する。
Next, a method of forming a pipe joint using the above-mentioned outer mold and core mold will be explained.

先ず、下型1のキヤビテイ内にガラス繊維強化
材3を配置する。この時のガラス繊維強化材とし
ては、プリフオームマツト,チヨツプドストラン
ドマツト,ロービングクロス,ガラスクロス等を
単独で或いは組み合わせて使用する。そのガラス
繊維強化材3の上に芯型4を置き、更にその上に
ガラス繊維強化材5を乗せて上型2を閉じる。な
お、この手順のかわりに、芯型4を先ずガラス繊
維強化材で巻装し、その芯型4を下型1内に配置
し、上型2を閉じるようにしてもよい。
First, the glass fiber reinforcement material 3 is placed in the cavity of the lower mold 1. As the glass fiber reinforcing material at this time, preform mat, chopped strand mat, roving cloth, glass cloth, etc. are used singly or in combination. A core mold 4 is placed on top of the glass fiber reinforced material 3, a glass fiber reinforced material 5 is further placed on top of the core mold 4, and the upper mold 2 is closed. Note that instead of this procedure, the core mold 4 may be first wrapped with glass fiber reinforcement, the core mold 4 may be placed inside the lower mold 1, and the upper mold 2 may be closed.

次に下型1,上型2の端面に芯型4のフランジ
13を挟んで封止蓋9を取りつけ、注入口10か
ら加圧流体を芯型4内の中空部に供給して加圧
し、芯型4を成形する管継手11に必要な内径ま
で脹らませる。ここで用いる加圧流体は、水、油
等の液体でも良いが、操作上空気を用いるのが簡
便である。即ち、液体の場合は回収操作が必要と
なるが、空気は使用後大気中に解放すれば良く、
また、減圧操作への切り替えが簡単である。以
下、空気を用いるものとして説明する。芯型4を
脹らませるための空気圧は、成形品(管継手)の
大きさ、芯型4の肉厚、弾性率等に応じて適宜決
定すればよいが、0.5〜2Kg/cm2が好ましい。な
お、成形品が大型になれば樹脂液注入圧を高くす
る必要があり、それに応じて芯型の内圧も高く設
定することが好ましい。
Next, a sealing lid 9 is attached to the end faces of the lower mold 1 and the upper mold 2 with the flange 13 of the core mold 4 in between, and pressurized fluid is supplied from the injection port 10 to the hollow part in the core mold 4 to pressurize it. The core mold 4 is inflated to the necessary inner diameter for the pipe joint 11 to be molded. The pressurized fluid used here may be a liquid such as water or oil, but it is convenient to use air for operational reasons. In other words, liquids require recovery operations, but air only needs to be released into the atmosphere after use.
In addition, switching to depressurization operation is easy. The following description will be made assuming that air is used. The air pressure for inflating the core mold 4 may be determined as appropriate depending on the size of the molded product (pipe joint), the wall thickness of the core mold 4, the elastic modulus, etc., but it is preferably 0.5 to 2 Kg/cm 2 . Incidentally, if the molded product becomes larger, it is necessary to increase the resin liquid injection pressure, and it is preferable to set the internal pressure of the core mold to be high accordingly.

その後、上型2の樹脂注入口6から常温硬化不
飽和ポリエステル樹脂、或いはエポキシ樹脂を常
法のレジンインジエクシヨン法により外型と芯型
との空隙部に圧入する。注入樹脂の硬化後、芯型
4の加圧を止め且つ内部を常圧に戻すと芯型4は
自身の弾性により収縮し、成形された管継手11
から離型する。この際、場合によつては、芯型4
の内部を減圧して負圧とする。芯型4の内部を負
圧とすると、芯型の収縮量が大きくなり、離型が
より確実となる。次に芯型4端部の封止蓋9の取
付を解除し、上型2を脱型する。その後に芯型4
を管継手11の内側に折り畳み、管継手11の受
口より取り出し、管継手11を下型1より脱型す
る。なお、管継手11の脱型後に芯型を取り出し
てもよい。かくして、強化プラスチツク製のL字
形管継手1が製造される。
Thereafter, a cold-curing unsaturated polyester resin or epoxy resin is press-fitted into the gap between the outer mold and the core mold through the resin injection port 6 of the upper mold 2 by a conventional resin injection method. After the injected resin has hardened, when the pressure on the core mold 4 is stopped and the inside pressure is returned to normal pressure, the core mold 4 contracts due to its own elasticity, and the molded pipe fitting 11
Release from the mold. At this time, in some cases, the core type 4
The internal pressure is reduced to negative pressure. When the inside of the core mold 4 is made to have a negative pressure, the amount of contraction of the core mold becomes large, and mold release becomes more reliable. Next, the sealing lid 9 at the end of the core mold 4 is released, and the upper mold 2 is removed. After that, core type 4
is folded inside the pipe joint 11, taken out from the socket of the pipe joint 11, and the pipe joint 11 is removed from the lower mold 1. Note that the core mold may be taken out after demolding the pipe joint 11. In this way, an L-shaped pipe joint 1 made of reinforced plastic is manufactured.

なお、本実施例では芯型4の端部近傍の外周面
に環状の凸部14を、外型の対応部分に凹部15
を設けているので、成形された管継手11の端部
近傍の管壁が外周に環状に突出し、内周に環状の
凹状部を形成している。内周に凹状部を有する管
継手は、施工の際、この凹状部に環状ゴムパツキ
ングを嵌入した後直管を挿入するだけで継合部の
密封を完全にすることができ、極めて好ましいも
のである。
In this embodiment, an annular convex portion 14 is provided on the outer peripheral surface near the end of the core mold 4, and a recess 15 is provided on the corresponding portion of the outer mold.
, the pipe wall near the end of the molded pipe fitting 11 protrudes in an annular shape on the outer periphery and forms an annular recessed part on the inner periphery. Pipe joints having a concave part on the inner periphery are extremely preferable because during construction, the joint can be completely sealed by simply inserting the annular rubber packing into the concave part and then inserting the straight pipe. .

第4図は封止蓋9の取付方法に関する他の実施
例を示す。本実施例では芯型4Aの開口端に内向
きのフランジ16を設けており、その内側に固着
される止め板17を用いて封止蓋9を取りつけ、
下型1,上型2に形成された凹溝18に封止蓋9
を嵌合させて固定する方法を取つている。この方
法によると外型に芯型4をセツトする前に芯型4
に封止蓋9を取りつけることができる為、その着
脱が容易となり、また、複数個の芯型に封止蓋を
取りつけたものを予め用意しておけば作業能率が
著しく向上する。
FIG. 4 shows another embodiment of the method of attaching the sealing lid 9. As shown in FIG. In this embodiment, an inward flange 16 is provided at the open end of the core mold 4A, and a sealing lid 9 is attached using a stopper plate 17 fixed to the inside of the flange 16.
A sealing lid 9 is placed in the groove 18 formed in the lower mold 1 and the upper mold 2.
We are using a method of fitting and fixing the parts. According to this method, before setting the core mold 4 on the outer mold,
Since the sealing lid 9 can be attached to the core mold, it is easy to attach and remove it, and if a plurality of core molds with sealing lids are prepared in advance, work efficiency can be significantly improved.

発明の効果 本発明によれば次の効果が得られる。Effect of the invention According to the present invention, the following effects can be obtained.

(1) 芯型として一体構造の中空弾性体を用いるた
め、分割型の芯型を用いる場合のような分解組
立の手間が無く、脱型も内部を常圧又は負圧に
することにより極めて容易に行うことができ
る。この結果、管継手の成形にレジンインジエ
クシヨン法を用いることが可能となつた。
(1) Since a hollow elastic body with an integral structure is used as the core mold, there is no need for disassembly and assembly, which is required when using a split core mold, and demolding is extremely easy as the internal pressure is maintained at normal or negative pressure. can be done. As a result, it has become possible to use the resin injection method for molding pipe joints.

(2) 成形はレジンインジエクシヨン法によるた
め、ハンドレイアツプ法のように作業者の高度
な熟練を必要とせず、安定した品質の管継手が
得られる。
(2) Since molding is performed using the resin injection method, pipe fittings of stable quality can be obtained without requiring highly skilled workers unlike the hand lay-up method.

(3) 従来のハンドレイアツプ法に比べてはるかに
生産性が高い。
(3) Much more productive than the traditional hand lay-up method.

(4) 剛性の高い外型を用いるため、外観が美麗で
ある。また、レジンインジエクシヨン法である
ので、樹脂が確実に充填され、欠陥のない製品
が得られる。
(4) The appearance is beautiful because a highly rigid outer mold is used. Furthermore, since it is a resin injection method, the resin is reliably filled and a defect-free product can be obtained.

(5) 中空弾性体の芯型を用いるため、芯型外周に
凸部を形成しても脱型が可能であり、図示実施
例のように、芯型外周に凸部14を設けること
により、内周に凹状部を有する管継手を容易に
製造できる。
(5) Since a core mold made of a hollow elastic body is used, it is possible to remove the mold even if a convex portion is formed on the outer periphery of the core mold, and by providing a convex portion 14 on the outer periphery of the core mold as in the illustrated embodiment, A pipe joint having a concave portion on the inner periphery can be easily manufactured.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明方法の一実施例に用いる外型、
芯型を組み合わせる途中の状態を示す正断面図、
第2図は外型、芯型を組み合わせ且つ樹脂を注入
した状態での型端部の側断面図、第3図は第2図
と同じ状態での水平断面図、第4図は他の実施例
を示す第2図と同様な側断面図である。 1…下型、2…上型、4…芯型、3,5…ガラ
ス繊維補強材、6…樹脂注入口、11…管継手。
FIG. 1 shows an outer mold used in an embodiment of the method of the present invention.
A front sectional view showing the state in the middle of assembling the core molds,
Figure 2 is a side sectional view of the end of the mold with the outer mold and core mold combined and resin injected, Figure 3 is a horizontal sectional view in the same state as Figure 2, and Figure 4 is another example. FIG. 2 is a side sectional view similar to FIG. 2 illustrating an example; DESCRIPTION OF SYMBOLS 1... Lower mold, 2... Upper mold, 4... Core mold, 3, 5... Glass fiber reinforcement material, 6... Resin injection port, 11... Pipe joint.

Claims (1)

【特許請求の範囲】[Claims] 1 剛性を有する二分割以上の割り型からなる外
型と、一体構造の中空弾性体からなる芯型とを使
用し、外型と芯型との間の空隙部に繊維強化材を
装着した後、前記芯型の中空部に加圧流体を供給
して該中空部内を一定圧に保持し、その状態で、
前記外型と芯型との空隙部に合成樹脂液を圧入し
て繊維強化材と合成樹脂液とを一体化し、硬化さ
せた後に前記芯型の中空部内圧力を常圧もしくは
負圧として成形品を脱型することを特徴とする強
化プラスチツク管継手の製造法。
1 After using an outer mold made of a rigid split mold of two or more parts and a core mold made of a hollow elastic body of integral structure, and installing fiber reinforcement material in the gap between the outer mold and the core mold. , supplying pressurized fluid to the hollow part of the core mold to maintain the inside of the hollow part at a constant pressure, and in this state,
A synthetic resin liquid is press-fitted into the gap between the outer mold and the core mold to integrate the fiber reinforcement material and the synthetic resin liquid, and after curing, the pressure inside the hollow part of the core mold is set to normal pressure or negative pressure to produce a molded product. A method for manufacturing reinforced plastic pipe joints, which is characterized by demolding.
JP9003884A 1984-05-04 1984-05-04 Manufacture of glass fiber-reinforced plastic pipe joint Granted JPS60232918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9003884A JPS60232918A (en) 1984-05-04 1984-05-04 Manufacture of glass fiber-reinforced plastic pipe joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9003884A JPS60232918A (en) 1984-05-04 1984-05-04 Manufacture of glass fiber-reinforced plastic pipe joint

Publications (2)

Publication Number Publication Date
JPS60232918A JPS60232918A (en) 1985-11-19
JPS642048B2 true JPS642048B2 (en) 1989-01-13

Family

ID=13987476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9003884A Granted JPS60232918A (en) 1984-05-04 1984-05-04 Manufacture of glass fiber-reinforced plastic pipe joint

Country Status (1)

Country Link
JP (1) JPS60232918A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3670788D1 (en) * 1985-08-22 1990-06-07 Budd Co METHOD FOR PRODUCING A HOLLOW FIBER REINFORCED ITEM.
FR2624784B1 (en) * 1987-12-18 1990-05-11 Bertin & Cie METHOD AND DEVICE FOR MANUFACTURING A BOTTLE OF COMPOSITE MATERIAL, AND BOTTLE THUS OBTAINED
JPH0673872B2 (en) * 1990-03-22 1994-09-21 住友ゴム業株式会社 Manufacturing method of fiber reinforced plastic
US5156786A (en) * 1990-07-02 1992-10-20 Hudson Products Corporation Method for manufacuring fan blades
JP2003094448A (en) * 2001-09-25 2003-04-03 Toray Ind Inc Manufacturing method for frp hollow structure
KR100723801B1 (en) 2006-10-19 2007-05-31 우주엘엔티(주) A supporter for a road lamp

Also Published As

Publication number Publication date
JPS60232918A (en) 1985-11-19

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