JPS5845865Y2 - Annular groove mold for thermoplastic resin pipe - Google Patents
Annular groove mold for thermoplastic resin pipeInfo
- Publication number
- JPS5845865Y2 JPS5845865Y2 JP7907176U JP7907176U JPS5845865Y2 JP S5845865 Y2 JPS5845865 Y2 JP S5845865Y2 JP 7907176 U JP7907176 U JP 7907176U JP 7907176 U JP7907176 U JP 7907176U JP S5845865 Y2 JPS5845865 Y2 JP S5845865Y2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- thermoplastic resin
- annular groove
- elastomer
- elastomer ring
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/02—Belling or enlarging, e.g. combined with forming a groove
- B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【考案の詳細な説明】
本考案は熱可塑性樹脂管の内面に、周方向の環状溝を成
形するための金型に関する。[Detailed Description of the Invention] The present invention relates to a mold for forming a circumferential annular groove on the inner surface of a thermoplastic resin pipe.
熱可塑性樹脂管の接続継手として、第１図に示すように
管７の端部内面に周方向の環状溝８を成形したものは周
知であり、その環状溝８を成形するための装置も各種知
られている。As shown in FIG. 1, a connection joint for thermoplastic resin pipes in which a circumferential annular groove 8 is formed on the inner surface of the end of a pipe 7 is well known, and various devices are also available for forming the annular groove 8. Are known.
その一つとして、例えば゛第２図および第３図に示すよ
うに、マンドレル１に割リング２とそれを囲むエラスト
マーリング３とからなる拡縮自在の成形リングを装着し
、その成形リングをスライドコーン４等により拡縮させ
る形式のものが知られている。For example, as shown in Figs. 2 and 3, an expandable molding ring consisting of a split ring 2 and an elastomer ring 3 surrounding it is attached to a mandrel 1, and the molding ring is attached to a slide cone. 4 etc. is known.
（なお第２図上半分はマンドレル１のみを示している）
この装置は成形リングを拡張して割リング２の各セグメ
ン）２１，２１．・・・・・・間に間隙が生じてもエラ
ストマーリング３があるため前記間隙に樹脂が流れ込む
ことがないという長所があるが、反面エラストマーリン
グ３が繰り返し伸縮することにより復元力を失うため、
エラストマーリングの交換が多くなるという欠点がある
。(The upper half of Figure 2 shows only mandrel 1)
This device expands the molding ring to separate each segment of the split ring 2) 21, 21 . ...Even if a gap occurs, the elastomer ring 3 has the advantage that the resin will not flow into the gap, but on the other hand, the elastomer ring 3 loses its restoring force due to repeated expansion and contraction.
The disadvantage is that the elastomer ring must be replaced frequently.
本考案は上記欠点を解決するため、エラストマーリング
３に復元用ばねを内蔵させたことを特徴とするものであ
る。In order to solve the above-mentioned drawbacks, the present invention is characterized in that a restoring spring is built into the elastomer ring 3.
以下本考案を第４〜６図により説明すると、マンドレル
１は管７内径とほぼ等しい外径のガイド部１１と、その
ガイド部１１よりも径大な拡径部１２からなる。The present invention will be explained below with reference to FIGS. 4 to 6. The mandrel 1 includes a guide portion 11 having an outer diameter approximately equal to the inner diameter of the tube 7, and an enlarged diameter portion 12 having a larger diameter than the guide portion 11.
拡径部１２には周方向に巾一定の環状空所１３（第２図
上半分参照）が設けられ、その空所１３の内側には、ス
ライドコーン４を収納するためのさらに広い空所が設け
られている。The enlarged diameter portion 12 is provided with an annular cavity 13 (see the upper half of FIG. 2) having a constant width in the circumferential direction, and inside the cavity 13 is an even wider cavity for storing the slide cone 4. It is provided.
環状空所１３には割リング２およびエラストマーリング
３が装着され、これらはスライドコーン４の前進、後退
により拡張、縮小する。A split ring 2 and an elastomer ring 3 are attached to the annular cavity 13, and these expand and contract as the slide cone 4 moves forward and backward.
本考案金型の割リング２およびエラストマーリング３を
、第５〜６図により更に詳細に説明すると、割リング２
は、多数の扇形のセグメン）２１．２１・・・・・・が
ばね６で連結されており、またその割リングの外周面に
は天然ゴム、ネオプレン、スチレン−ブタジェンゴム等
のエラストマー材料からなるエラストマーリング３が接
触している。The split ring 2 and elastomer ring 3 of the mold of the present invention will be explained in more detail with reference to FIGS.
21, 21... are connected by a spring 6, and the outer circumferential surface of the split ring is covered with an elastomer made of an elastomer material such as natural rubber, neoprene, or styrene-butadiene rubber. Ring 3 is in contact.
エラストマーリング３には鋼製のコイル状ばね５が全周
にわたって内蔵されている。A coiled steel spring 5 is built into the elastomer ring 3 over its entire circumference.
管７に環状溝８を成形するには、管１の端部を加熱軟化
して、その端部に、第４図に示すようにマンドレル１を
挿入する。To form the annular groove 8 in the tube 7, the end of the tube 1 is heated and softened, and the mandrel 1 is inserted into the end as shown in FIG.
それによりマンドレル１の拡径部１２によって拡径ソケ
ット７１が形成される。As a result, an enlarged diameter socket 71 is formed by the enlarged diameter portion 12 of the mandrel 1 .
その際には割リング２およびエラストマーリング３は第
４図上半分および第５図に示すような縮小状態にある。At that time, the split ring 2 and the elastomer ring 3 are in a contracted state as shown in the upper half of FIG. 4 and in FIG. 5.
ついでスライドコーン４を第４図矢印方向に前進させる
と割リング２は第４図下半分および第６図に示すように
拡張し、それに伴ってエラストマーリング３も拡張し、
このエラストマーリングが拡径ソケット７１を外方に膨
出させて環状溝８が成形される。Next, when the slide cone 4 is advanced in the direction of the arrow in FIG. 4, the split ring 2 expands as shown in the lower half of FIG. 4 and FIG. 6, and the elastomer ring 3 also expands accordingly.
This elastomer ring bulges the enlarged diameter socket 71 outward to form the annular groove 8.
成形された環状溝８の外面には外型９をあてがって整形
する。An outer mold 9 is applied to the outer surface of the formed annular groove 8 to shape it.
環状溝８の成形が完了すれば、スライドコーン４を後退
させる。Once the annular groove 8 has been formed, the slide cone 4 is moved back.
すると割リング２はばね６の作用により縮小状態にもど
り、またエラストマーリング３もエラストマー材料自体
の弾性とばね５の作用とで縮小状態にもどる。Then, the split ring 2 returns to its contracted state due to the action of the spring 6, and the elastomer ring 3 also returns to its contracted state due to the elasticity of the elastomer material itself and the action of the spring 5.
そしてエラストマーリングの伸縮の繰り返しによりエラ
ストマー材料が劣化して弾性を失った場合にはばね５の
作用のみによってエラストマーリング３を縮小状態に復
元させる。When the elastomer material deteriorates and loses elasticity due to repeated expansion and contraction of the elastomer ring, the elastomer ring 3 is restored to its contracted state only by the action of the spring 5.
なお以上の説明においては、割リング２およびエラスト
マーリング３を拡縮させる手段としてスライドコーンの
みを示したが、その他にも公知の各種の機械的手段を適
宜採用することができる。In the above description, only the slide cone was shown as a means for expanding and contracting the split ring 2 and the elastomer ring 3, but various other known mechanical means may be employed as appropriate.
以上説明したように本考案金型はエラストマーリング３
にばね５を内蔵させたことにより、エラストマーリング
３が繰り返し伸縮による劣化で復元力を失っても、ばね
５の復元力によりエラストマーリング３を拡張状態から
縮小状態に復元させることができるため、エラストマー
リングの耐用回数を大巾に向上させ、また常に正しい位
置を保つことができる。As explained above, the mold of this invention has elastomer ring 3.
By incorporating the spring 5 into the elastomer ring 3, even if the elastomer ring 3 loses its restoring force due to deterioration due to repeated expansion and contraction, the restoring force of the spring 5 can restore the elastomer ring 3 from the expanded state to the contracted state. The service life of the ring is greatly increased and the correct position can be maintained at all times.
第１図は本考案金型により成形される熱可塑性樹脂管の
側断面図、第２図は従来の金型の側断面図、第３図は第
２図下半分のＡ−Ａ断面図、第４図は本考案金型の側断
面図、第５〜６図は本考案金型の割リングおよびエラス
トマーリングの部分説明図、
１・・・・・・マンドレル、１３・・・・・・環状空所
、２・・・・・・割リング、３・・・・・・エラストマ
ーリング、５・・・・・・復元用ばね、７・・・・・・
熱可塑性樹脂管、８・・・・・・環状溝。FIG. 1 is a side sectional view of a thermoplastic resin pipe molded by the mold of the present invention, FIG. 2 is a side sectional view of a conventional mold, and FIG. 3 is a sectional view taken along line A-A in the lower half of FIG. Figure 4 is a side sectional view of the mold of the present invention, Figures 5 and 6 are partial explanatory views of the split ring and elastomer ring of the mold of the present invention, 1... Mandrel, 13... Annular cavity, 2... Split ring, 3... Elastomer ring, 5... Restoration spring, 7...
Thermoplastic resin pipe, 8... annular groove.
Claims (1)
に周方向の環状空所１３を設け、前記マンドレル１の径
方向に拡縮する割リング２および割ノング２外周面を囲
んで接触するエラストマーリング３を前記環状空所１３
内に装着し、エラストマーリング３に周方向に復元用ば
ね５を内蔵し、前記割リング２およびエラストマーリン
グ３を適宜の機械的手段により拡縮させるようにした熱
可塑性樹脂管の環状溝成形金型。Cylindrical mandrel 1 for insertion into thermoplastic resin pipes
A split ring 2 that expands and contracts in the radial direction of the mandrel 1 and an elastomer ring 3 that surrounds and contacts the outer peripheral surface of the split tongue 2 are provided in the annular space 13 in the circumferential direction.
An annular groove molding mold for a thermoplastic resin pipe, in which a restoring spring 5 is built in the elastomer ring 3 in the circumferential direction, and the split ring 2 and the elastomer ring 3 are expanded and contracted by appropriate mechanical means. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7907176U JPS5845865Y2 (en) | 1976-06-18 | 1976-06-18 | Annular groove mold for thermoplastic resin pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7907176U JPS5845865Y2 (en) | 1976-06-18 | 1976-06-18 | Annular groove mold for thermoplastic resin pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52170876U JPS52170876U (en) | 1977-12-26 |
| JPS5845865Y2 true JPS5845865Y2 (en) | 1983-10-19 |
Family
ID=28556550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7907176U Expired JPS5845865Y2 (en) | 1976-06-18 | 1976-06-18 | Annular groove mold for thermoplastic resin pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5845865Y2 (en) |
-
1976
- 1976-06-18 JP JP7907176U patent/JPS5845865Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52170876U (en) | 1977-12-26 |
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