JPH0368815B2 - - Google Patents
Info
- Publication number
- JPH0368815B2 JPH0368815B2 JP58237297A JP23729783A JPH0368815B2 JP H0368815 B2 JPH0368815 B2 JP H0368815B2 JP 58237297 A JP58237297 A JP 58237297A JP 23729783 A JP23729783 A JP 23729783A JP H0368815 B2 JPH0368815 B2 JP H0368815B2
- Authority
- JP
- Japan
- Prior art keywords
- joint
- joint body
- cavity
- synthetic 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
- B29D23/003—Pipe joints, e.g. straight joints
- B29D23/008—T-joints
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
- B29C45/14622—Lining the inner or outer surface of tubular articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、内外面が合成樹脂層でライニングさ
れた内外面防食継手の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an anti-corrosion joint whose inner and outer surfaces are lined with synthetic resin layers.
従来の防食継手としては、金属製継手本体に対
しその内面のみ、或は外面のみを合成樹脂でライ
ニングしたものが一般的であるが、管の内と外か
らの防食が共に要求される配管ラインにおいて
は、内外面が樹脂ライニングされた接合管の接続
に対し、施工時に特別の防食処理を施こさなくと
も、単に上記接合管を螺合接合するのみで継手部
の内外面のシールが完全に行われるようにした内
外面防食継手が提案されている。 Conventional anti-corrosion fittings generally have a metal fitting body lined only on the inner or outer surface with synthetic resin, but for piping lines that require corrosion protection from both the inside and outside of the pipe. When connecting jointed pipes whose inner and outer surfaces are lined with resin, the inner and outer surfaces of the joint can be completely sealed by simply screwing together the jointed pipes without any special anti-corrosion treatment during construction. An anti-corrosion joint for internal and external surfaces has been proposed.
まず、斯かる如き内外面防食継手を第５図によ
つて簡単に説明するが、第５図は内外面防食継手
及び接合管の一例の接続状態の縦断面図である。
同図において２１は内外面防食継手で、Ｔ型の金
属製継手本体２２の各端部内面にテーパねじ２３
が形成されており、該テーパねじ２３を除く継手
本体２２の内面に塩化ビニル樹脂等の合成樹脂層
２５がライニング形成され、前記テーパねじ２３
の内面側に該ねじ２３との間に間隙２４をもつた
円筒部が形成されている。又継手本体２２の外面
全体にわたつても同様の合成樹脂層２６がライニ
ング形成され、その端部は本体２２の端面よりも
突出し、突出部内面はテーパ状をなすように形成
してある。一方接合管３０は、端部外面にテーパ
ねじ３１を有した鋼管、鋳鉄管等から成る管本体
３２に対し、該テーパねじ３１部を除く内外両面
全体を、上記同様の合成樹脂層３３によりライニ
ングしてある。 First, such a corrosion-resistant inner and outer joint will be briefly explained with reference to FIG. 5, which is a longitudinal cross-sectional view of an example of the corrosion-proof joint and the joint pipe in a connected state.
In the figure, reference numeral 21 denotes a corrosion-proof joint on the inner and outer surfaces, with tapered screws 23 on the inner surface of each end of the T-shaped metal joint body 22.
A synthetic resin layer 25 such as vinyl chloride resin is formed as a lining on the inner surface of the joint body 22 except for the tapered thread 23.
A cylindrical portion having a gap 24 between the screw 23 and the screw 23 is formed on the inner surface side of the screw 23 . Further, a similar synthetic resin layer 26 is formed as a lining over the entire outer surface of the joint main body 22, and the end portion thereof protrudes beyond the end surface of the main body 22, and the inner surface of the protruding portion is formed in a tapered shape. On the other hand, the joint pipe 30 has a pipe body 32 made of a steel pipe, a cast iron pipe, etc. that has a tapered thread 31 on the outer surface of the end, and the entire inner and outer surfaces except for the tapered thread 31 are lined with a synthetic resin layer 33 similar to the above. It has been done.
従つてこのような接合管３０を、そのねじ３１
をもつて継手２１のねじ２３に螺合接続すれば、
継手２１の内面合成樹脂層２５からねじ２３の内
面側に延出した円筒部の外径D1を、接合管３０
の内径d1より基部において若干大きくし、又樹脂
層２６の突出部内径D2を接合管３０の外径d2よ
り基部において若干小さくしておくことにより、
嵌合部において内外面が相互に圧着し、接合部が
完全に密着シールされた状態となる。この場合、
好ましくはこれら圧着部分に接着剤が塗布せしめ
られる。斯くして、内外面防食処理をした防食継
手２１と接合管３０とは緊密に接合し、接合部に
おいて金属部分が内外面において露出することな
く、完全に合成樹脂層により被覆されるので、極
めて良好な防食効果を発揮する。 Therefore, such a joint pipe 30 is connected to its screw 31.
If it is screwed into the screw 23 of the joint 21 with
The outer diameter D 1 of the cylindrical portion extending from the inner surface synthetic resin layer 25 of the joint 21 to the inner surface side of the screw 23 is
By making the inner diameter d 1 of the resin layer 26 slightly larger at the base and the inner diameter D 2 of the protruding portion of the resin layer 26 slightly smaller than the outer diameter d 2 of the joint pipe 30 at the base,
The inner and outer surfaces are pressed against each other at the fitting portion, and the joint portion is completely tightly sealed. in this case,
Adhesive is preferably applied to these crimped parts. In this way, the anti-corrosion joint 21 and the joint pipe 30, which have been subjected to anti-corrosion treatment on the inside and outside surfaces, are tightly joined together, and the metal parts at the joint are not exposed on the inside and outside surfaces and are completely covered with the synthetic resin layer, making it extremely Demonstrates good anti-corrosion effect.
本発明は一例としての上述の如き内外面防食継
手２１について、金属製継手本体の内外面に合成
樹脂をライニングするための、極めて簡単で確実
な方法を提供せんとするもので、以下図面に基い
て本発明方法を詳述する。 The present invention aims to provide an extremely simple and reliable method for lining the inner and outer surfaces of the metal joint body with synthetic resin for the above-mentioned inner and outer anti-corrosion joint 21 as an example, and is based on the following drawings. The method of the present invention will now be described in detail.
第１図は本発明方法を説明するために、一例と
しての割金型の固定側型板を省略し、被ライニン
グ継手本体をセツトした状態で示した一部を断面
とした要部金型の平面図、第２図は第１図の割金
型を閉じ合成樹脂射出可能状態における同様の一
部を断面とした平面図である。而してこの場合、
上述内外面防食継手２１を製造する場合として以
下説明するが、継手本体２２については既に説明
した部分は同一の符号を付してその説明は省略す
る。 In order to explain the method of the present invention, FIG. 1 is a partial cross-sectional view of the main part of the mold, with the fixed side mold plate of the split mold as an example omitted, and the main body of the joint to be lined being set. 2 is a partially sectional plan view similar to that shown in FIG. 1 when the split mold is closed and the synthetic resin can be injected. In this case,
The case of manufacturing the above-mentioned inner and outer anti-corrosion joint 21 will be described below, but the parts of the joint body 22 that have already been described will be given the same reference numerals and the description thereof will be omitted.
第１，２図において、１は割金型で、２はその
可動側型板であり、該金型２には被ライニング継
手本体２２が樹脂をライニングするのに必要な間
隙を保つて配設されるためのキヤビテイ３が形成
されている。又該金型２のキヤビテイ３の継手本
体２２が配設される部分には、キヤビテイ３内に
突出し、或はキヤビテイ３を形成する壁面と一致
する如く退避しうる可動の磁石４が、この場合３
個配設され、可動側型板の開閉動作と連動して出
入する如く構成されている。この場合磁石４は、
Ｔ型継手本体２２の各接続口に対応した外面各中
央部に各１個宛配設して、該継手本体２２を支承
するようになつているが、エルボ、ブシユ等他の
継手に対しては、それらに応じた金型に対し２個
乃至３個以上適宜支承に好ましい位置に配設して
おけばよい。又被ライニング継手本体の設定位置
を確定するために、図示しない位置固定用の突起
を連動して出入可能に配設しておくのが好まし
い。５は外面、内面合成樹脂層成形用切換えゲー
トであり、該ゲート５に続いて内面合成樹脂層成
形用ランナ６及び外面合成樹脂層成形用ランナ７
がそれぞれキヤビテイ３に通じるように形成され
ている。８，９，１０はそれぞれ可動側型板と連
動し、キヤビテイ３に対し進入、後退しうるよう
に配設されたスライドコアであり、各コア８，
９，１０は一体の棒体でもよいが、この場合軸に
対し相互に摺動しうるように芯体８Ａ，９Ａ，１
０Ａ、筒体８Ｂ，９Ｂ，１０Ｂの二重構造で形成
されている。 In Figures 1 and 2, 1 is a split mold, 2 is a movable mold plate thereof, and a joint body 22 to be lined is arranged in the mold 2 with a gap necessary for lining the resin. A cavity 3 is formed for this purpose. In addition, in the part of the mold 2 where the joint body 22 of the cavity 3 is disposed, there is a movable magnet 4 that can protrude into the cavity 3 or be retracted so as to coincide with the wall surface forming the cavity 3. 3
They are arranged individually and are configured to move in and out in conjunction with the opening and closing operations of the movable mold plate. In this case, the magnet 4 is
One piece is placed at each center of the outer surface of the T-type joint body 22 corresponding to each connection port to support the joint body 22. Two to three or more of them may be appropriately disposed at positions suitable for supporting the corresponding mold. Further, in order to determine the set position of the joint body to be lined, it is preferable that position fixing protrusions (not shown) are arranged so as to be able to move in and out in conjunction with each other. 5 is a switching gate for forming the outer and inner synthetic resin layers, and following the gate 5, a runner 6 for forming the inner synthetic resin layer and a runner 7 for forming the outer synthetic resin layer.
are formed so as to communicate with the cavity 3, respectively. Reference numerals 8, 9, and 10 indicate slide cores that are arranged so as to be able to move into and out of the cavity 3 in conjunction with the movable side mold plate, and each of the cores 8, 9, and 10
9 and 10 may be integral rod bodies, but in this case, core bodies 8A, 9A, 1 are provided so that they can mutually slide on the shaft.
It is formed with a double structure of 0A, cylinders 8B, 9B, and 10B.
該スライドコア８の筒体８Ｂは、キヤビテイ３
に対する所定の進入位置でランナ６の開口端と一
致するランナ８ａが、筒体８Ｂの外面側に対し内
面側が小径となるように壁面を貫通形成してあ
り、端部外面には上記継手２１の外面ライニング
樹脂層２６の突出部を形成する段部８ｂ、継手２
１のねじ２３部に嵌入して該ねじ２３を被う段部
８ｃをそれぞれ形成し、先端は該継手本体２２の
ねじ２３に対応した長さよりもやや突出した長さ
に形成してある。又芯体８Ａは、第１図上先端下
半部がこの場合45度にカツトされて傾斜面８ｄを
形成しており、該傾斜面８ｄ及び上記筒体８Ｂの
ランナ８ａに通じる側面間には、該両部間を貫通
する内面合成樹脂層成形用ランナ８ｅが形成され
ており、さらに第１図上において上記傾斜面８ｄ
から上部周面にかけては、ランナ８ｅと通じ、上
部周面と通じる部分で径が絞られて、上部周面に
貫通形成されたランナ８ｆが形成されている。又
芯体８Ａの端部外面には、上記継手本体２２のね
じ２３部に対応した部分に、該ねじ２３との間に
間隙２４をもつて内面合成樹脂層２５から延出し
た円筒部を形成するために、上記筒体８Ｂの端部
内面との間に円筒状の空隙を形成させる段部８ｇ
が形成されている。一方、スライドコア９の芯体
９Ａの端部には、上記芯体８Ａと同様の傾斜面９
ａが形成されていると共に、ランナ８ｆと通じる
部分ランナ９ｂが芯体９Ａの端部の中間部に形成
され、該ランナ９ｂの上部は、端部側に対し内部
側がより上方に深く形成されるようにして、部分
ランナ９ｂに対し芯体９Ａが鉤状をなしており、
該芯体９Ａの端部外面は上記芯体８Ａの段部８ｇ
と同様の段部９ｃを形成している。又筒体９Ｂに
ついては、上記筒体８Ｂの外面の段部８ｂ、段部
８ｃとそれぞれ同様に、段部９ｄ、段部９ｅが形
成され、コア８の周面形状と対称形をなした構成
となつている。さらにスライドコア１０の芯体１
０Ａの端面は、各コア８，９，１０のキヤビテイ
３内の所定位置への進入状態で、コア８，９の上
記各傾斜面８ｄ，９ａと合致するように、中心に
対して両側が共にカツトされた傾斜面１０ａを形
成しており、該芯体１０Ａの端部外面は上記芯体
８Ａの段部８ｇと同様の段部１０ｂを形成してい
る。又筒体１０Ｂについては上記筒体８Ｂの外面
の段部８ｂ，８ｃと同様の段部１０ｃ，１０ｄが
それぞれ形成されている。 The cylindrical body 8B of the slide core 8 is connected to the cavity 3.
A runner 8a, which coincides with the opening end of the runner 6 at a predetermined entry position, is formed through the wall surface of the cylinder 8B so that the inner surface thereof has a smaller diameter than the outer surface side, and the outer surface of the end portion is provided with the above-mentioned joint 21. Step portion 8b forming a protrusion of outer surface lining resin layer 26, joint 2
A stepped portion 8c is formed to fit into and cover the screw 23 of the joint body 23, and the tip thereof is formed to have a length slightly protruding from the length corresponding to the screw 23 of the joint body 22. In addition, the lower half of the top end of the core body 8A in FIG. , a runner 8e for molding an inner synthetic resin layer is formed which penetrates between the two parts, and the inclined surface 8d in FIG.
The runner 8f communicates with the runner 8e, and the diameter is narrowed at the portion communicating with the upper circumferential surface to form a runner 8f penetrating the upper circumferential surface. Further, on the outer surface of the end of the core body 8A, a cylindrical portion is formed at a portion corresponding to the screw portion 23 of the joint body 22, extending from the inner surface synthetic resin layer 25 with a gap 24 between the screw portion 23 and the screw portion 23. In order to
is formed. On the other hand, the end of the core body 9A of the slide core 9 has an inclined surface 9 similar to the core body 8A.
a is formed, and a partial runner 9b communicating with the runner 8f is formed in the middle of the end of the core body 9A, and the upper part of the runner 9b is formed deeper upward on the inner side than on the end side. In this way, the core body 9A has a hook shape with respect to the partial runner 9b,
The outer surface of the end of the core 9A is the stepped portion 8g of the core 8A.
A step portion 9c similar to that is formed. The cylinder 9B has a step 9d and a step 9e formed on the outer surface of the cylinder 8B in the same way as the step 8b and step 8c, respectively, and is symmetrical to the circumferential shape of the core 8. It is becoming. Furthermore, the core body 1 of the slide core 10
Both sides of the end face of 0A are aligned with respect to the center so that the cores 8, 9, 10 are aligned with the inclined surfaces 8d, 9a of the cores 8, 9 when they enter the predetermined positions in the cavity 3. A cut inclined surface 10a is formed, and the outer surface of the end of the core 10A forms a step 10b similar to the step 8g of the core 8A. Further, the cylinder 10B has step portions 10c and 10d similar to the step portions 8b and 8c on the outer surface of the cylinder 8B, respectively.
斯かる如き構成の金型を用いて、継手本体２２
の内外面に合成樹脂層のライニングを行うには、
まず第１図に示す如く、継手本体２２を可動側型
板２のキヤビテイ３内に突出した状態の磁石４に
対し、所定位置をとるようにセツトし、その後固
定側型板と合せれば、図示しない連動機構、たと
えば固定側型板に設けた傾斜ピンと各コア８，
９，１０の嵌合孔との関係等により、各コア８，
９，１０は継手本体２２の各接続口から内部に進
入し、第２図に示す如く、型閉じと同時に各コア
８，９，１０の端部が相互に圧着して、継手本体
２２の内面及び外面に合成樹脂ライニングの為の
所定空間、即ち内面ライニング用キヤビテイ３
Ａ、及び外面ライニング用キヤビテイ３Ｂを構成
する。この際、継手本体２２を一旦キヤビテイ３
内の所定位置に支承していた磁石４は、固定側型
板とカム機構等の適宜の連結機構或は手動機構等
によつて、各スライドコア８，９，１０が所定位
置をとる直前乃至は所定位置をとつた後に、上記
支承位置から退避し、最終的に可動側型板２のキ
ヤビテイ３を形成する壁面と一致するようにして
ある。従つてこの時、継手本体２２は合成樹脂ラ
イニングのための所定のキヤビテイが形成された
状態で、各コア８，９，１０によつて安定的に、
強固に金型１内に固定されることになる。 Using a mold with such a configuration, the joint body 22
To line the inner and outer surfaces with a synthetic resin layer,
First, as shown in FIG. 1, the joint body 22 is set in a predetermined position relative to the magnet 4 protruding into the cavity 3 of the movable mold plate 2, and then aligned with the fixed mold plate. An interlocking mechanism (not shown), for example, an inclined pin provided on the stationary template and each core 8,
Depending on the relationship with the fitting holes 9 and 10, each core 8,
9 and 10 enter the inside of the joint body 22 from each connection port, and as shown in FIG. and a predetermined space for synthetic resin lining on the outer surface, i.e. cavity 3 for inner lining.
A, and a cavity 3B for outer surface lining. At this time, temporarily attach the joint body 22 to the cavity 3.
The magnet 4, which was supported at a predetermined position inside, is moved from just before each slide core 8, 9, 10 takes a predetermined position by means of an appropriate coupling mechanism such as a fixed side mold plate and a cam mechanism, or a manual mechanism, etc. After assuming a predetermined position, it is retracted from the above-mentioned supporting position, and finally coincides with the wall surface forming the cavity 3 of the movable mold plate 2. Therefore, at this time, the joint body 22 is stably operated by each core 8, 9, 10 with a predetermined cavity formed for the synthetic resin lining.
It will be firmly fixed within the mold 1.
この状態で、切換えゲート５を介して合成樹脂
を射出すれば、内面合成樹脂層形成用ランナ６か
らの樹脂は、ランナ８ａ，８ｅ，８ｆから継手本
体２２の内面ライニング用キヤビテイ３Ａに充填
され、又外面合成樹脂層形成用ランナ７からの樹
脂は、直ちに外面ライニング用キヤビテイ３Ｂに
充填される。充填後、各型板に設けた図示しない
冷却孔に冷却水を通し、金型１を冷却し充填した
樹脂を硬化させる。その後金型１を開けば、上述
作動と逆に可動側型板に連動して、各スライドコ
ア８，９，１０は継手本体２２に対し共に後退
し、第１図位置に復元する。この際ランナ６，８
ａ部に充填された樹脂は、コア８の後退時の力を
利用し第２図上時計方向に回転され、容易に金型
から取出すことができ、又ランナ８ｅ，８ｆに充
填された樹脂は、コア９の後退に伴い、部分ラン
ナ９ｂ部の樹脂がその上部のコア９の鉤形部分９
ｆで引掛けられて共に移動するので、一体に引張
られ容易に取出すことができる。又製品の継手は
各スライドコアー８，９，１０が後退した後に、
磁石４又は別に設ける突出機構によりキヤビテイ
３から離脱させ取り出すことができる。又継手本
体２２は樹脂ライニングに先だち、予め加熱して
おくと樹脂との結合性においてより好ましい。 In this state, if synthetic resin is injected through the switching gate 5, the resin from the inner surface synthetic resin layer forming runner 6 will be filled into the inner surface lining cavity 3A of the joint body 22 from the runners 8a, 8e, 8f. The resin from the outer synthetic resin layer forming runner 7 is immediately filled into the outer lining cavity 3B. After filling, cooling water is passed through cooling holes (not shown) provided in each mold plate to cool the mold 1 and harden the filled resin. After that, when the mold 1 is opened, the slide cores 8, 9, and 10 move back together with respect to the joint body 22 in conjunction with the movable mold plate in the opposite manner to the above-described operation, and return to the position shown in FIG. 1. At this time, runners 6 and 8
The resin filled in part a is rotated clockwise in FIG. , as the core 9 retreats, the resin of the partial runner 9b portion is removed from the hook-shaped portion 9 of the upper core 9.
Since they are hooked at f and move together, they are pulled together and can be easily taken out. In addition, after each slide core 8, 9, 10 retreats, the joint of the product is
It can be detached from the cavity 3 and taken out using the magnet 4 or a separately provided protrusion mechanism. Further, it is more preferable to heat the joint body 22 in advance before applying the resin lining to improve bondability with the resin.
第３，４図は本発明の異なる他の樹脂ライニン
グ方法を説明するための第１図に対応する一部を
断面とした要部平面図、及び第２図に対応する合
成樹脂射出可能状態の一部を断面とした要部平面
図であるが、この場合はスライドコアを介さずに
内面を樹脂ライニングするようにしたもので、第
１図の金型と同一の部分は同一の符号を付して、
その説明は省略する。この場合の割金型１′の可
動側型板２′には、一本のランナ７が設けられて
いるのみで、磁石４に対して吸着設定された継手
本体２２′の上記ランナ７のキヤビテイ３に対す
る開口ゲートに対応した壁部に、その内外面に通
じる貫通孔２２′ａが形成されている。 Figures 3 and 4 are a partially sectional plan view of the main part corresponding to Figure 1 for explaining another resin lining method of the present invention, and Figure 2 is a plan view of the synthetic resin in a state ready for injection. This is a plan view of the main part with a part cut away, but in this case, the inner surface is lined with resin without using the slide core, and the same parts as the mold in Figure 1 are given the same reference numerals. do,
The explanation will be omitted. In this case, the movable mold plate 2' of the split mold 1' is provided with only one runner 7, and the cavity of the runner 7 of the joint body 22', which is set to be attracted to the magnet 4, is A through hole 22'a communicating with the inner and outer surfaces of the wall portion corresponding to the opening gate 3 is formed in the wall portion corresponding to the opening gate 3.
従つて、この場合にも可動側型板を閉じること
によつて、継手本体２２′に対し各スライドコア
８，９，１０がセツトされ、内外面樹脂ライニン
グ用キヤビテイ３Ａ，３Ｂが形成される。そこで
ランナ７を介して合成樹脂を射出すれば、該樹脂
はキヤビテイ３Ｂに充填されて外面合成樹脂層を
形成すると共に、継手本体２２′の壁面貫通孔２
２′ａを介してキヤビテイ３Ａにも充填され、内
面合成樹脂層を形成する。この場合にも、予め継
手本体２２′は適宜に加熱しておくのが好ましい。
以後前記の場合と同様に冷却して型開きを行え
ば、内外面樹脂ライニングされた継手２１′が得
られることになる。 Therefore, in this case as well, by closing the movable side template, each slide core 8, 9, 10 is set in the joint body 22', and the cavities 3A, 3B for the inner and outer resin lining are formed. Therefore, if synthetic resin is injected through the runner 7, the resin will fill the cavity 3B and form an outer synthetic resin layer, as well as the wall through-hole 2 of the joint body 22'.
It is also filled into the cavity 3A via 2'a, forming an inner surface synthetic resin layer. In this case as well, it is preferable to heat the joint body 22' appropriately in advance.
Thereafter, by cooling and opening the mold in the same manner as in the above case, a joint 21' whose inner and outer surfaces are lined with resin will be obtained.
以上の如く本発明は、割金型内に継手本体をセ
ツトし、また該継手本体にスライドコアを挿入し
て継手本体の内外面にライニング用のキヤビテイ
を形成したのち、各キヤビテイ内に溶融樹脂を充
填する製造方法であるので、金属製の継手本体の
内外面を合成樹脂層によつて、確実、かつ強固に
被覆することができる。また、かくして得られた
内外面防食継手は、継手本体の内面を被覆してい
る合成樹脂層から延出してテーパねじとの間に間
隙をもつた円筒部が形成されるので、内外面が樹
脂ライニングされた接合管を水密に接続すること
ができ、地中埋設配管の継手として、極めて優れ
たものである。 As described above, in the present invention, a joint body is set in a split mold, a slide core is inserted into the joint body, cavities for lining are formed on the inner and outer surfaces of the joint body, and then molten resin is poured into each cavity. Since this manufacturing method involves filling the metal joint body with the synthetic resin layer, the inner and outer surfaces of the metal joint body can be reliably and firmly covered with the synthetic resin layer. In addition, in the thus obtained inner and outer corrosion-resistant joint, a cylindrical part is formed that extends from the synthetic resin layer coating the inner surface of the joint body and has a gap between it and the tapered screw, so that the inner and outer surfaces are made of resin. It can connect lined joint pipes in a watertight manner, making it an extremely excellent joint for underground piping.
第１図は本発明方法を説明するために、一例と
しての割金型の固定型板を省略し、被ライニング
継手本体をセツトした状態で示した一部を断面と
した要部金型の平面図、第２図は第１図の割金型
を閉じ合成樹脂射出可能状態における同様の一部
を断面とした平面図、第３図及び第４図は本発明
の異なる他の合成樹脂ライニング方法を説明する
ためのそれぞれ第１図及び第２図に対応する一部
を断面とした各要部平面図、第５図は内外面防食
継手及び接合管の一例の接続状態の縦断面図であ
る。
１，１′……割金型、２，２′……可動側型板、
３，３Ａ，３Ｂ……キヤビテイ、４……磁石、
８，９，１０……スライドコア、２１……内外面
防食継手、２２……継手本体、２５……内面合成
樹脂層、２６……外面合成樹脂層。
In order to explain the method of the present invention, FIG. 1 is a plan view of the main part of the mold, with the fixed mold plate of the split mold as an example omitted, and the main body of the joint to be lined set in place, with a part of the main mold in cross section. 2 is a partially sectional plan view of the split mold shown in FIG. 1 in a state in which synthetic resin can be injected, and FIGS. 3 and 4 are other synthetic resin lining methods according to the present invention. FIG. 5 is a longitudinal cross-sectional view of an example of an internal and external anti-corrosion joint and a jointed pipe in a connected state. . 1, 1'... split mold, 2, 2'... movable side template,
3, 3A, 3B...Cavity, 4...Magnet,
8, 9, 10...Slide core, 21...Internal and external anti-corrosion joint, 22...Joint body, 25...Inner surface synthetic resin layer, 26...Outer surface synthetic resin layer.
Claims (1)
内に金属製継手本体をセツトして該継手本体の外
面と割金型との間に外面ライニング用キヤビテイ
を形成する工程と、前記継手本体内にスライドコ
アを挿入して該継手本体の端部内面に設けられて
いるテーパねじをスライドコアの筒体端部で被
い、該筒体の端部内面と該筒体内に挿入されてい
る芯体の端部外面との間で円筒状の空〓を形成す
ると共に、該芯体の端部外面と前記継手本体の内
面との間に内面ライニング用キヤビテイを形成す
る工程と、前記外面用キヤビテイに溶融樹脂を充
填して継手本体の外面を合成樹脂層でライニング
する工程と、内面用キヤビテイに溶融樹脂を充填
して継手本体のテーパねじを除く内面を合成樹脂
層でライニングすると共に、該合成樹脂層から延
出して前記円筒状の空〓に充填された溶融樹脂に
よつて前記テーパねじとの間に間〓をもつた円筒
部を成形する工程とからなることを特徴とする内
外面防食継手の製造方法。1. A step of setting a metal joint main body in a split mold consisting of a fixed side mold plate and a movable side mold plate and forming an outer surface lining cavity between the outer surface of the joint body and the split mold; A slide core is inserted into the joint body, the tapered screw provided on the inner surface of the end of the joint body is covered with the cylindrical end of the slide core, and the slide core is inserted into the inner surface of the end of the cylindrical body and into the cylindrical body. forming a cylindrical cavity between the outer end of the core and the inner surface of the joint body, and forming an inner lining cavity between the outer end of the core and the inner surface of the joint body; Filling the outer cavity with molten resin and lining the outer surface of the joint body with a synthetic resin layer, and filling the inner cavity with molten resin and lining the inner surface of the joint body except for the tapered screw with a synthetic resin layer. and forming a cylindrical part having a gap between it and the tapered screw using the molten resin extending from the synthetic resin layer and filling the cylindrical space. A manufacturing method for anti-corrosion joints on the inside and outside surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23729783A JPS60129225A (en) | 1983-12-16 | 1983-12-16 | Manufacture of coupler having corrosion-resistant inner and outer faces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23729783A JPS60129225A (en) | 1983-12-16 | 1983-12-16 | Manufacture of coupler having corrosion-resistant inner and outer faces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60129225A JPS60129225A (en) | 1985-07-10 |
| JPH0368815B2 true JPH0368815B2 (en) | 1991-10-29 |
Family
ID=17013278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23729783A Granted JPS60129225A (en) | 1983-12-16 | 1983-12-16 | Manufacture of coupler having corrosion-resistant inner and outer faces |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60129225A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0637068B2 (en) * | 1988-11-10 | 1994-05-18 | 日立金属株式会社 | Method of injection molding a cylinder inside a valve box |
| JPH0276013U (en) * | 1988-11-29 | 1990-06-11 | ||
| AT404777B (en) * | 1995-12-14 | 1999-02-25 | Zelenka Rudolf Ing | METHOD FOR SHIELDING PLASTIC HOUSES AGAINST ELECTROMAGNETIC RADIATION |
| ES2399488T3 (en) * | 2009-03-09 | 2013-04-01 | Georg Fischer Jrg Ag | Procedure for the manufacture of a hollow body with a tubular shape, as well as a hollow body with a tubular shape |
| CN102615777A (en) * | 2012-04-01 | 2012-08-01 | 无锡优塑美科技有限公司 | Injection molding process of aluminum insert for LED radiator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57208227A (en) * | 1981-06-19 | 1982-12-21 | Chiyoda:Kk | Manufacturing apparatus of corrosion proof pipe joint |
-
1983
- 1983-12-16 JP JP23729783A patent/JPS60129225A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60129225A (en) | 1985-07-10 |
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