JPH0257763B2 - - Google Patents
Info
- Publication number
- JPH0257763B2 JPH0257763B2 JP58162363A JP16236383A JPH0257763B2 JP H0257763 B2 JPH0257763 B2 JP H0257763B2 JP 58162363 A JP58162363 A JP 58162363A JP 16236383 A JP16236383 A JP 16236383A JP H0257763 B2 JPH0257763 B2 JP H0257763B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe joint
- jig
- main body
- pipe fitting
- setting
- 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
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 238000001746 injection moulding Methods 0.000 claims description 12
- 238000005260 corrosion Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000007797 corrosion Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 description 13
- 229920003002 synthetic resin Polymers 0.000 description 7
- 239000000057 synthetic resin Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- 235000013351 cheese Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
-
- 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
- B29C45/14065—Positioning or centering articles in the mould
-
- 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
-
- 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
- B29D23/006—Elbows
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、管継手の外周面に樹脂層を形成して
なる防食管継手の製造装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a corrosion-resistant pipe joint in which a resin layer is formed on the outer peripheral surface of the pipe joint.
近時、金属管継手の外周面に樹脂層を形成し
て、その金属管継手の耐食性を向上させるように
した防食管継手が多用されている。 Recently, anti-corrosion pipe joints have been widely used in which a resin layer is formed on the outer peripheral surface of the metal pipe joints to improve the corrosion resistance of the metal pipe joints.
ところで、このような防食管継手を製造する装
置としては、従来、例えば第１図に示すように、
管継手ａを収容させて、該管継手ａの外周面に樹
脂層を射出成形にて形成するキヤビテイｂを有し
た金型ｃと、この金型ｃ内の管継手ａの開口端面
a1に全周面に亘つて密接する第１治具本体d1を有
し且つその第１治具本体d1の先端部に前記管継手
ａの雌ねじ部a2と螺合する螺合部d2を有したセツ
ト治具ｄからなるものであつた。 By the way, conventional equipment for manufacturing such anti-corrosion pipe joints is, for example, as shown in Fig. 1.
A mold c having a cavity b for accommodating the pipe fitting a and forming a resin layer on the outer peripheral surface of the pipe fitting a by injection molding, and an open end surface of the pipe fitting a in the mold c.
A threaded portion having a first jig body d 1 in close contact with the entire circumferential surface of the first jig body d 1 and screwed into the female threaded portion a 2 of the pipe fitting a at the distal end of the first jig body d 1 It consisted of a setting jig d having a diameter of d2 .
そして、このような装置であると、管継手ａの
外周面に樹脂層を形成する場合、該管継手ａの雌
ねじ部a2にセツト治具ｄの螺合部d2を螺合させ
て、該セツト治具ｄの第１治具本体d1を管継手ａ
の開口端面a1に密接させ、次いでこれらセツト治
具ｄと管継手ａを共に金型ｃのキヤビテイｂに収
容させ、しかる後管継手ａの外周面に射出成形に
て樹脂層を形成し、最後にセツト治具ｄの螺合部
d2を管継手ａの雌ねじ部a2から外してセツト治具
ｄと管継手ａをひき離すという具合である。とこ
ろが、この場合、管継手ａの外周面に射出成形に
て樹脂層を形成する段階でセツト治具ｄと管継手
ａが非常に高温となるので、セツト治具ｄの螺合
部d2と管継手ａの雌ねじ部a2とが焼き付いてしま
い、後で外すときに非常に困難になるという不都
合があつた。 With such a device, when forming a resin layer on the outer peripheral surface of the pipe fitting a, the threaded part d2 of the setting jig d is screwed into the female thread part a2 of the pipe fitting a, Connect the first jig body d1 of the setting jig d to the pipe joint a.
Then , the setting jig d and the pipe fitting a are both housed in the cavity b of the mold c, and after that, a resin layer is formed on the outer peripheral surface of the pipe fitting a by injection molding, Finally, the threaded part of the set jig d
d 2 is removed from the female threaded portion a 2 of the pipe fitting a, and the setting jig d and the pipe fitting a are separated. However, in this case, the setting jig d and the pipe fitting a become extremely hot at the stage of forming the resin layer on the outer peripheral surface of the pipe fitting a by injection molding, so the threaded part d 2 of the setting jig d and There was an inconvenience in that the female thread part a2 of the pipe joint a was seize up, making it extremely difficult to remove it later.
しかも、このような装置であると、セツト治具
ｄを管継手ａに取り付ける場合、螺合により行わ
なければならないので、どうしてもこの段階では
手作業にならざるを得ず、この為その取付け作業
が非常に面倒になるという不都合があつた。 Moreover, with such a device, when attaching the setting jig d to the pipe fitting a, it must be done by screwing, so this step has to be done manually, which makes the installation work difficult. The problem was that it was very troublesome.
さらにまた、このような装置であると、セツト
治具ｄを管継手ａに取付けた後、これらを持つて
金型ｃのキヤビテイｂに収容させなければならな
いので、このような重量物を持ち運びするのは大
変な作業となり、人体に非常な疲労をあたえると
いう不都合があつた。 Furthermore, with such a device, after attaching the setting jig d to the pipe joint a, it is necessary to hold it and place it into the cavity b of the mold c, which makes it difficult to carry such a heavy object. This was difficult work and had the disadvantage of causing great fatigue to the human body.
本発明は、このような事情があることに鑑みて
なされたもので、その目的とするところは、手作
業でセツト治具を管継手に螺合させるというよう
な面倒な作業を不要にでき、またセツト治具のよ
うな重量物を持ち運ばないでも済み、さらにまた
管継手の雌ねじ部がセツト治具の螺合部に焼き付
くといつた不都合も解消できる防食管継手の製造
装置を提供することにある。 The present invention has been made in view of these circumstances, and its purpose is to eliminate the need for troublesome work such as manually screwing a setting jig into a pipe joint, To provide a manufacturing device for a corrosion-resistant pipe joint, which eliminates the need to carry a heavy object such as a setting jig, and also eliminates the inconvenience caused when the female threaded part of the pipe joint seizes into the threaded part of the setting jig. It is in.
本発明の防食管継手の製造装置は、かかる目的
を達成するために、
管継手を収容させて、該管継手の外周面に樹脂
層を射出成形にて形成するキヤビテイを有した金
型と、
この金型内の管継手の開口端面に密接させる第
１治具本体を有し、この第１治具本体の先端部に
前記管継手の端部内面に形成された雌ねじ部の内
周面と近接させて嵌装する第２治具本体を有し、
前記第１治具本体の前記管継手の開口端面と対向
する部分にはリング状の収納溝が形成され、この
収納溝には第１治具本体と管継手の開口端面との
間を密封する耐熱シールリングが嵌装されている
セツト治具と、
このセツト治具を前記管継手の開口部に対して
進退自在に操作するシリンダとを具備させたもの
である。 In order to achieve the above object, the apparatus for manufacturing a corrosion-resistant pipe joint of the present invention includes: a mold having a cavity for accommodating a pipe joint and forming a resin layer on the outer peripheral surface of the pipe joint by injection molding; The mold has a first jig main body brought into close contact with the opening end surface of the pipe fitting, and the tip of the first jig main body has an inner circumferential surface of a female thread formed on the inner surface of the end of the pipe fitting. having a second jig main body that is fitted in close proximity;
A ring-shaped storage groove is formed in a portion of the first jig main body facing the open end surface of the pipe joint, and the storage groove seals between the first jig main body and the open end surface of the pipe joint. It is equipped with a setting jig into which a heat-resistant seal ring is fitted, and a cylinder that allows the setting jig to be moved forward and backward with respect to the opening of the pipe joint.
以下、本発明の一実施例を第２図および第３図
を参照して説明する。 An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.
第２図において、１は下型であり、この下型１
には、管継手１０を収容してその外周面を合成樹
脂等で射出成形するためのキヤビテイ２と、この
キヤビテイ２内に合成樹脂等を導く通路３と、更
に上記管継手１０の両端開口部１０ａ，１０ａに
対しセツト治具２０，２０を進退自在に装入し得
る案内路４，４とが設けられている。 In FIG. 2, 1 is a lower mold, and this lower mold 1
, a cavity 2 for accommodating the pipe joint 10 and having its outer peripheral surface injection molded with synthetic resin, a passage 3 for guiding the synthetic resin, etc. into the cavity 2, and openings at both ends of the pipe joint 10. Guide paths 4, 4 are provided in which setting jigs 20, 20 can be inserted into the guides 10a, 10a in a freely movable manner.
なお、この下型１の上面には、図示してないが
該下型１と同形状の上型が衝合されるようになつ
ており、これら下型１と上型で金型を構成してい
る。 Although not shown, an upper mold having the same shape as the lower mold 1 is fitted onto the upper surface of the lower mold 1, and the lower mold 1 and the upper mold form a mold. ing.
また、管継手１０は両端部が開口し且つ中央部
が90゜屈曲したエルボ形のもので、その両開口部
内周面には雌ねじ部１１，１１が形成され、その
雌ねじ部１１，１１の内方側には第３図に詳細に
示すように管継手１０の軸心方向に傾斜する第１
テーパー部１２，１２が形成され、その第１テー
パー部１２，１２の内方側には第１平行部１３，
１３が形成され、その平行部１３，１３の内方側
には管継手１０の軸心方向に傾斜する第２テーパ
ー部１４，１４が形成され、その第２テーパー部
１４，１４の内方側には第２平行部１５，１５が
形成されている。 Further, the pipe joint 10 is of an elbow shape with both ends open and the center part bent at 90 degrees, and female threaded portions 11, 11 are formed on the inner peripheral surface of both openings. As shown in detail in FIG. 3, the first side is inclined toward the axis of the pipe joint 10
Tapered parts 12, 12 are formed, and on the inner side of the first tapered parts 12, 12, a first parallel part 13,
13 is formed, and second tapered parts 14, 14 that are inclined in the axial direction of the pipe joint 10 are formed on the inner side of the parallel parts 13, 13, and on the inner side of the second tapered parts 14, 14. 2nd parallel parts 15, 15 are formed in .
また、セツト治具２０は、前記下型１と上型を
衝合させたときに形成される円形の案内路４…に
対し、これに沿つて案内される円形の外側板２１
と、その外側板２１の先端部に第３図に示す如く
管継手１０の開口端面１６と密接させる第１治具
本体２２と、その第１治具本体２２の先端部に前
記管継手１０の雌ねじ部１１の内周面と可及的に
近接する第２治具本体２３と、さらにその第２治
具本体２３の先端部に前記管継手１０の第２平行
部１５の内周面と可及的に近接する第３治具本体
２４とが設けられている。 The setting jig 20 also includes a circular outer plate 21 guided along a circular guide path 4 formed when the lower mold 1 and the upper mold are brought into contact with each other.
3, the first jig body 22 is brought into close contact with the opening end surface 16 of the pipe fitting 10 at the distal end of the outer plate 21, and the first jig main body 22 is attached to the distal end of the first jig main body 22, as shown in FIG. A second jig main body 23 that is as close as possible to the inner circumferential surface of the female threaded portion 11 , and a distal end of the second jig main body 23 that is close to the inner circumferential surface of the second parallel portion 15 of the pipe fitting 10 . A third jig main body 24 is provided which is close to the third jig main body 24.
なお、上記第３治具本体２４の先端には面取り
２４ａが施してあり、また上記第１治具本体２２
の一側面、つまり前記管継手１０の開口端面１６
側には収納溝２２ａがリング状に形成されてお
り、この収納溝２２ａに、第１治具本体２２と管
継手１０の開口端面１６との間で密封する耐熱シ
ールリングたる耐熱Ｏリング２５が嵌装されてい
る。 The tip of the third jig main body 24 is chamfered 24a, and the first jig main body 22
, that is, the open end surface 16 of the pipe joint 10
A storage groove 22a is formed in a ring shape on the side, and a heat-resistant O-ring 25, which is a heat-resistant seal ring that seals between the first jig main body 22 and the open end surface 16 of the pipe fitting 10, is installed in the storage groove 22a. It is fitted.
また、図中３０，３０は前記下型１の両隅にブ
ラケツト（図示せず）等を介して各々取付けられ
たシリンダであつて、それらのロツド３０ａ，３
０ａの先端には前記セツト治具２０，２０が各々
着脱可能に取付けてあり、これらシリンダ３０，
３０のロツド３０ａ，３０ａの突没動作によつ
て、前記セツト治具２０，２０の各々を第２図に
示すように管継手１０の開口部１０ａ，１０ａに
対し進退自在に操作するようになつている。 Further, in the figure, numerals 30 and 30 are cylinders that are respectively attached to both corners of the lower die 1 via brackets (not shown), and these rods 30a and 30
The setting jigs 20, 20 are removably attached to the tip of 0a, and these cylinders 30,
By the protruding and retracting motion of the rods 30a, 30a, each of the setting jigs 20, 20 can be freely moved forward and backward relative to the openings 10a, 10a of the pipe joint 10, as shown in FIG. ing.
しかして、このような防食管継手の製造装置で
あれば、前記管継手１０の外周面に合成樹脂等の
樹脂層１７を形成する場合、次のような手順で行
う。 Accordingly, in this type of corrosion-resistant pipe joint manufacturing apparatus, when forming the resin layer 17 of synthetic resin or the like on the outer circumferential surface of the pipe joint 10, the following procedure is used.
すなわち、まずシリンダ３０，３０のロツド３
０ａ，３０ａを後方に後退させて、それらロツド
３０ａ，３０の先端に取付けたセツト治具２０，
２０を各々第２図の左側に示すような位置にセツ
トしておく。 That is, first, the rod 3 of the cylinders 30, 30
0a, 30a are moved backward, and the setting jig 20 is attached to the tips of the rods 30a, 30.
20 are set in the positions shown on the left side of FIG.
そして、この状態で、下型１のキヤビテイ２の
中央に設けてある突出しピン５を出し、管継手１
０をこのキヤビテイ２内に適当に収容させてお
く。 In this state, the ejecting pin 5 provided at the center of the cavity 2 of the lower mold 1 is pulled out, and the pipe fitting 1 is inserted.
0 is appropriately accommodated in this cavity 2.
次いで、前記シリンダ３０，３０のロツド３０
ａ，３０ａを突出動作させてセツト治具２０，２
０の各々を、管継手１０の両端開口部１０ａ，１
０ａに装入する。この場合、両セツト治具２０，
２０を同速度で進行させると、それらのセツト治
具２０，２０の面取り部２４ａ，２４ａがまず管
継手１０の第２平行部１５，１５に当り、更に両
セツト治具２０，２を進行させると、両セツト治
具２０，２０は管継手１０の両端開口部１０ａ，
１０ａに対し、第３図に示すような状態に配置さ
れる。なお、このように両セツト治具２０，２０
が装入された管継手１０は宙に浮いた状態とな
る。 Next, the rod 30 of the cylinders 30, 30
Set jigs 20 and 2 by protruding the parts a and 30a.
0 to both end openings 10a and 1 of the pipe joint 10.
Charge to 0a. In this case, both setting jigs 20,
20 are advanced at the same speed, the chamfered portions 24a, 24a of those setting jigs 20, 20 first hit the second parallel portions 15, 15 of the pipe joint 10, and both setting jigs 20, 2 are further advanced. and both setting jigs 20, 20 are connected to the openings 10a at both ends of the pipe joint 10,
10a is arranged in the state shown in FIG. In addition, in this way, both setting jigs 20, 20
The pipe fitting 10 into which it has been charged is suspended in the air.
次に、上型と下型１に対して衝合させ、しかる
後前記突出ピン５を引つ込める。 Next, the upper mold and the lower mold 1 are brought into contact with each other, and then the protruding pin 5 is retracted.
そして、この状態で、上型と下型１のキヤビテ
イ２内に合成樹脂等を射出すれば、そのキヤビテ
イ２内に収容された管継手１０の外周面には樹脂
層１７が形成される。 In this state, if synthetic resin or the like is injected into the cavities 2 of the upper and lower molds 1, a resin layer 17 is formed on the outer peripheral surface of the pipe joint 10 accommodated in the cavities 2.
そして、この後上型を外して、シリンダ３０，
３０のロツド３０ａ，３０ａを後退動作させれ
ば、それらロツド３０ａ，３０ａの先端に取付け
たセツト治具２０，２０は自動的に管継手１０の
両端開口部１０ａ，１０ａから抜けでることとな
る。そして、この後前記樹脂層１７が形成された
防食管継手１０′を取り出せばよい。 After this, the upper mold is removed and the cylinder 30,
When the rods 30a, 30a are moved backward, the setting jigs 20, 20 attached to the tips of the rods 30a, 30a will automatically come out from the openings 10a, 10a at both ends of the pipe joint 10. After that, the anticorrosive pipe joint 10' on which the resin layer 17 has been formed can be taken out.
したがつて、このような防食管継手の製造装置
であれば、シリンダ３０のロツド３０ａを突出動
作させることによつてセツト治具２０を管継手１
０に自動的にセツトさせることができるから、従
来のように手作業でセツト治具ｄを管継手ａに螺
合させるというような面倒な作業は一切不要とな
り、作業が非常に楽になるとともに、生産効率も
向上させることができる。 Therefore, with such a manufacturing apparatus for anti-corrosion pipe fittings, the setting jig 20 can be attached to the pipe fitting 1 by projecting the rod 30a of the cylinder 30.
Since it can be automatically set to 0, there is no need for the troublesome work of manually screwing the setting jig d into the pipe joint a as in the past, making the work very easy. Production efficiency can also be improved.
また、セツト治具２０は、下型１等に取付けた
シリンダ３０のロツド３０ａに取付けておけば、
あとは下型１のキヤビテイ２に収容させた管継手
１０に自動的にセツトできるから、従来のように
セツト治具ｄを管継手ａに手作業で螺合させた
後、これらを下型１まで運搬するというような重
労働は避けることができ、作業をより一層楽にし
かも効率よく行なうことができる。 Moreover, if the setting jig 20 is attached to the rod 30a of the cylinder 30 attached to the lower mold 1, etc.,
The rest can be automatically set to the pipe joint 10 housed in the cavity 2 of the lower mold 1, so after manually screwing the setting jig d into the pipe joint a as in the conventional method, these are attached to the lower mold 1. This allows you to avoid the heavy labor of transporting items up to the ground, making your work easier and more efficient.
また、上記セツト治具２０の第２治具本体２３
は、管継手の雌ねじ部１１の内周面に対し可及的
に近接するように設けたので、従来のように管継
手ａの外周面に合成樹脂等を射出成形する時、該
管継手ａの雌ねじ部ａとセツト治具ｄの螺合部ｄ
とが焼き付いてしまうというような不都合も防止
でき、セツト治具２０を管継手１０から容易に外
すことができる。 Further, the second jig main body 23 of the setting jig 20
is provided as close as possible to the inner circumferential surface of the female threaded portion 11 of the pipe fitting a, so that when injection molding synthetic resin or the like on the outer circumferential surface of the pipe fitting a as in the past, the pipe fitting a Female threaded part a of and threaded part d of setting jig d
This also prevents inconveniences such as burning of the fittings, and allows the setting jig 20 to be easily removed from the pipe fitting 10.
また、上記セツト治具２０の第３治具本体２４
は、管継手１０の第２平行部１５の内周面に対し
可及的に近接するように設けたので、管継手１０
の外周面の射出成形時、この射出圧力によつて管
継手１０の奥部が変形を起こし曲がつてしまうと
いうようなことも有効に防止できる。 Further, the third jig main body 24 of the setting jig 20 is
is provided as close as possible to the inner circumferential surface of the second parallel portion 15 of the pipe joint 10, so that the pipe joint 10
During injection molding of the outer peripheral surface of the pipe joint 10, it is also possible to effectively prevent the inner part of the pipe joint 10 from being deformed and bent due to the injection pressure.
すなわち、管継手１０の外周面を合成樹脂等で
射出成形する場合には、この射出圧力が管継手１
０の外周面に対し、25Kg／cm2〜30Kg／cm2程度かか
るが、この場合、管継手１０の奥部を単に中空の
ままとしておくと、前記射出圧力によつて簡単に
変形を起こし曲がつてしまう。しかしながら、上
記セツト治具２０には、管継手１０の第２平行部
１５の内周面と可及的に近接する第３治具本体２
４を設けているので、管継手１０の外周面の射出
成形時、前記第３治具本体２４が管継手１０の第
２平行部１５を支持し、管継手１０の奥部の変形
を有効に防止することができるのである。 That is, when injection molding the outer circumferential surface of the pipe fitting 10 with synthetic resin or the like, this injection pressure
It takes about 25Kg/cm 2 to 30Kg/cm 2 for the outer circumferential surface of 0. In this case, if the inner part of the pipe joint 10 is simply left hollow, it will easily deform and bend due to the injection pressure. I get tired. However, the setting jig 20 includes a third jig main body 2 that is as close as possible to the inner circumferential surface of the second parallel portion 15 of the pipe joint 10.
4, the third jig main body 24 supports the second parallel part 15 of the pipe fitting 10 during injection molding of the outer peripheral surface of the pipe fitting 10, and effectively deforms the inner part of the pipe fitting 10. It can be prevented.
また、上記セツト治具２０の第１治具本体２２
には、その管継手１０の開口端面１６側に収納溝
２２ａを形成して、ここに耐熱Ｏリング２５を嵌
装させているので、前記第１治具本体２２を管継
手１０の開口端面１６に密接させた場合には、こ
の第１治具本体２２と管継手１０の開口端面１６
との間がしつかり密封され、その結果管継手１０
の外周面の射出成形時に合成樹脂等が管継手１０
の雌ねじ部１１に侵入し付着してしまうというよ
うなことも有効に防止できる。 Further, the first jig main body 22 of the setting jig 20 is
, a storage groove 22a is formed on the open end surface 16 side of the pipe joint 10, and a heat-resistant O-ring 25 is fitted therein, so that the first jig main body 22 can be inserted into the open end surface 16 of the pipe joint 10. When the first jig main body 22 and the opening end surface 16 of the pipe fitting 10 are brought into close contact with each other,
As a result, the pipe fitting 10 is tightly sealed.
During injection molding of the outer peripheral surface of the pipe fitting 10, synthetic resin etc.
It is also possible to effectively prevent the foreign matter from entering the female threaded portion 11 of the product and becoming attached thereto.
なお、本発明は前記実施例に限定されるもので
はない。例えば管継手はエルボ形のものに限らず
ソケツト形、三方チーズ形など他の形式のものに
も適用できること勿論である。 Note that the present invention is not limited to the above embodiments. For example, the pipe joint is not limited to the elbow type, but can of course be applied to other types such as a socket type and a three-way cheese type.
以上の説明からも理解されるように、本発明の
防食管継手の製造装置であれば、シリンダを操作
することによつてセツト治具を、金型に収容させ
た管継手に対し自動的にセツトできるようにした
ので、従来のように手作業でセツト治具を管継手
に螺合させるというような面倒な作業は一切不要
にでき、作業を非常に楽にすることができるとと
もに、生産効率も向上させることができる。 As can be understood from the above explanation, the anti-corrosion pipe fitting manufacturing apparatus of the present invention automatically moves the setting jig to the pipe fitting housed in the mold by operating the cylinder. Since the pipe can be set easily, the troublesome work of manually screwing the setting jig into the pipe joint, which was required in the past, is no longer necessary, making the work much easier and improving production efficiency. can be improved.
また、前記セツト治具はシリンダに取付けてお
けば、あとはシリンダの操作によつて、該セツト
治具を、金型に収容させた管継手に対しセツトで
きるので、従来のようなセツト治具を管継手にセ
ツトした後、これらを金型に運搬しなければなら
ないというような重労働は避けることができる。 In addition, once the setting jig is attached to the cylinder, the setting jig can be set to the pipe fitting housed in the mold by operating the cylinder, so it can be set to the pipe fitting housed in the mold, so it can be set to the pipe fitting housed in the mold. The heavy labor of having to transport these to the mold after setting them in the pipe joint can be avoided.
更に、前記セツト治具２０の第２治具本体は、
管継手の雌ねじ部の内周面に対し可及的に近接す
るように設けたので、管継手の外周面の射出成
時、前記第２治具本体と管継手の雌ねじ部とが焼
き付いてしまうというような不都合も防止でき、
セツト治具を管継手から容易に外すことができ
る。 Furthermore, the second jig main body of the setting jig 20 is
Since it is provided as close as possible to the inner circumferential surface of the female threaded portion of the pipe fitting, the second jig main body and the female threaded portion of the pipe fitting will seize during injection molding of the outer circumferential surface of the pipe fitting. It also prevents inconveniences such as
The setting jig can be easily removed from the pipe joint.
更に加えて、本発明の場合、セツト治具の第１
治具本体には、管継手の開口端面と対向する部分
にリング状の収納溝を形成し、この収納溝に第１
治具本体と管継手の開口端面との間を密封する耐
熱シールリングを嵌装しているので、射出成形
時、高圧の樹脂が第１治具本体と管継手の開口端
面との間から管継手の内面の雌ねじ部に侵入する
ことを確実に防止でき、そのため、管継手内面の
雌ねじ部に樹脂が付着し雌ねじ部がつぶれてしま
う不良品の発生を効果的に防止することができ
る。 In addition, in the case of the present invention, the first
A ring-shaped storage groove is formed in the jig body in a portion facing the opening end surface of the pipe joint, and a first groove is formed in this storage groove.
A heat-resistant seal ring is fitted to seal between the jig main body and the open end surface of the pipe fitting, so during injection molding, high-pressure resin flows into the pipe from between the first jig main body and the open end surface of the pipe fitting. It is possible to reliably prevent the resin from entering the female threaded portion on the inner surface of the joint, thereby effectively preventing the occurrence of defective products in which the resin adheres to the female threaded portion on the inner surface of the pipe joint and the female threaded portion is crushed.
第１図は従来例を一部破断にして示す平面図、
第２図および第３図は本考案に係る一実施例を示
すもので、第２図は装置全体を一部破断にして示
す平面図、第３図はセツト治具を管継手にセツト
した状態を一部拡大して示す側断面図である。
１……下型（金型）、２……キヤビテイ、１０
……管継手、１０ａ……管継手の開口部、１１…
…管継手の雌ねじ部、１６……管継手の開口端
面、１７……樹脂層、２０……セツト治具、２２
……セツト治具の第１治具本体、２２ａ……収納
溝、２３……セツト治具の第２治具本体、２５…
…耐熱Ｏリング（耐熱シールリング）、３０……
シリンダ。
Figure 1 is a partially cutaway plan view of a conventional example;
Figures 2 and 3 show an embodiment of the present invention, with Figure 2 being a partially cutaway plan view of the entire device, and Figure 3 showing the setting jig set in the pipe joint. It is a side sectional view which expands and shows a part. 1...Lower mold (mold), 2...Cavity, 10
... Pipe joint, 10a ... Opening of pipe joint, 11 ...
... Female thread part of pipe joint, 16 ... Opening end surface of pipe joint, 17 ... Resin layer, 20 ... Setting jig, 22
...First jig main body of the setting jig, 22a... Storage groove, 23... Second jig main body of the setting jig, 25...
...Heat-resistant O-ring (heat-resistant seal ring), 30...
Cylinder.
Claims (1)
脂層を射出成形にて形成するキヤビテイを有した
金型と、 この金型内の管継手の開口端面に密接させる第
１治具本体を有し、この第１治具本体の先端部に
前記管継手の端部内面に形成された雌ねじ部の内
周面と近接させて嵌装する第２治具本体を有し、
前記第１治具本体の前記管継手の開口端面と対向
する部分にはリング状の収納溝が形成され、この
収納溝には第１治具本体と管継手の開口端面との
間を密封する耐熱シールリングが嵌装されている
セツト治具と、 このセツト治具を前記管継手の開口部に対して
進退自在に操作するシリンダとを具備してなるこ
とを特徴とする防食管継手の製造装置。[Scope of Claims] 1. A mold having a cavity for accommodating a pipe joint and forming a resin layer on the outer circumferential surface of the pipe joint by injection molding; a second jig body that is fitted into the distal end of the first jig body so as to be close to the inner circumferential surface of a female threaded portion formed on the inner surface of the end portion of the pipe joint; have,
A ring-shaped storage groove is formed in a portion of the first jig main body facing the open end surface of the pipe joint, and the storage groove seals between the first jig main body and the open end surface of the pipe joint. Manufacture of a corrosion-resistant pipe joint, comprising: a setting jig into which a heat-resistant seal ring is fitted; and a cylinder that allows the setting jig to move forward and backward with respect to the opening of the pipe joint. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16236383A JPS6052323A (en) | 1983-09-01 | 1983-09-01 | Apparatus for manufacturing anticorrosive pipe coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16236383A JPS6052323A (en) | 1983-09-01 | 1983-09-01 | Apparatus for manufacturing anticorrosive pipe coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6052323A JPS6052323A (en) | 1985-03-25 |
| JPH0257763B2 true JPH0257763B2 (en) | 1990-12-05 |
Family
ID=15753139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16236383A Granted JPS6052323A (en) | 1983-09-01 | 1983-09-01 | Apparatus for manufacturing anticorrosive pipe coupling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6052323A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4242568A1 (en) | 2022-03-07 | 2023-09-13 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Air separation apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928549B (en) * | 2020-08-25 | 2022-05-06 | 江苏心源航空科技有限公司 | Preparation method of hailstones with controllable density and extrusion device for manufacturing hailstones |
Citations (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
- 1983-09-01 JP JP16236383A patent/JPS6052323A/en active Granted
Patent Citations (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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4242568A1 (en) | 2022-03-07 | 2023-09-13 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Air separation apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6052323A (en) | 1985-03-25 |
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