JPS6238135B2 - - Google Patents
Info
- Publication number
- JPS6238135B2 JPS6238135B2 JP14740278A JP14740278A JPS6238135B2 JP S6238135 B2 JPS6238135 B2 JP S6238135B2 JP 14740278 A JP14740278 A JP 14740278A JP 14740278 A JP14740278 A JP 14740278A JP S6238135 B2 JPS6238135 B2 JP S6238135B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- mover
- plastic tube
- finger
- type
- 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
- 239000004033 plastic Substances 0.000 claims description 30
- 238000000465 moulding Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【発明の詳細な説明】
本発明はプラスチツク管端部の成形用金型装置
の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a mold apparatus for forming the ends of plastic tubes.
プラスチツク管端部に受口を成形する金型とし
て、加熱されたプラスチツク管端部が圧入される
形式のものが公知である。 As a mold for forming a socket at the end of a plastic tube, a mold into which the heated end of the plastic tube is press-fitted is known.
また、上記の受口成形用金型を外金型で囲み、
これら金型間の隙間をプラスチツク管の肉厚に等
しいか、やゝ大となし、この隙間にプラスチツク
管の加熱端部を一旦比較的低い圧力（１次圧力）
で圧入し、次いで、更に高い押圧力（２次圧力）
で加圧すことも公知である。 In addition, the above-mentioned socket molding mold is surrounded by an outer mold,
The gap between these molds is made equal to or slightly larger than the wall thickness of the plastic tube, and the heated end of the plastic tube is placed in this gap at a relatively low pressure (primary pressure).
Press fit, then apply higher pressing force (secondary pressure)
It is also known to pressurize.
後者の受口成形法は、前者の単なる拡径成形で
は、管壁の周方向伸びによる受口の薄肉化が回避
できないので、上記のように設定された厚さの隙
間を埋めつくすようにプラスチツク管端部の材料
を塑性変形させて、受口の肉厚を確保することを
目的としている。 In the latter socket forming method, the former method of simply expanding the diameter cannot avoid thinning of the socket due to circumferential elongation of the pipe wall, so plastic is used to completely fill the gap with the thickness set above. The purpose is to plastically deform the material at the end of the tube to ensure the wall thickness of the socket.
ところで、ゴムリング装着溝と逆テーパ等のア
ンダーカツトとを共に有する受口を上記の方法に
よつて成形するには、成形後の脱型時、ゴムリン
グ装着溝に対してだけではなく、逆テーパ部にお
いても金型を縮径しなければならないから、金型
全体（全長）を縮径可能な分割とする必要があ
る。 By the way, in order to mold a socket that has both a rubber ring mounting groove and an undercut such as a reverse taper by the above method, when removing the mold after molding, it is necessary to not only have a rubber ring mounting groove but also a reverse taper. Since the diameter of the mold must be reduced also at the tapered portion, the entire mold (full length) must be divided into parts that can be reduced in diameter.
この種の金型も公知であるが、従来のこの種金
型に、上記したゴムリング装着溝を成形するため
の凸部と逆テーパ部を成形するための逆テーパ面
とを共に設け、上記した方法により受口を成形す
ると、凸部がプラスチツク管端部の圧入に抵抗す
るのみならず、逆テーパ部もプラスチツク管端部
の進入に逆うから、上記１次圧力が大となり、し
かも、この１次圧力よりも大に設定される２次圧
力も著しく大となる結果、金型分割片の相互ずれ
が生じて、成形された受口内面の形状、寸法にか
なりの誤差が生じるといつた問題がある。 This type of mold is also known, but a conventional mold of this type is provided with both a convex portion for molding the above-mentioned rubber ring mounting groove and a reverse tapered surface for molding the reverse taper portion, and When the socket is formed by this method, not only does the convex part resist the press-fitting of the plastic pipe end, but also the inversely tapered part opposes the insertion of the plastic pipe end, so the primary pressure mentioned above becomes large. The secondary pressure, which is set higher than the primary pressure, also becomes significantly higher, resulting in mutual misalignment of the mold segments, resulting in considerable errors in the shape and dimensions of the inner surface of the molded socket. There's a problem.
本発明は、含割金型の分割片相互の配位状態を
プラスチツク管端部の圧入下でも安定に維持でき
る金型装置を提供するものである。すなわち、本
発明に係るプラスチツク管端部の成形用金型装置
は、先端に至るほど背の低い上面テーパ状のフイ
ンガーが数本、相互に間隔を隔て、かつ円配列で
設けられた第１移動子並びに第２移動子とが、両
移動子のフインガーが交互に配置された状態で、
上記円配列の中心軸方向に沿つて移動自在に設け
られ、これら移動子の各フインガーのテーパ上面
には、これら移動子の後方移動によつて縮径され
る構成の分割筒形金型の各分割片が上記円配列の
中心軸方向に沿つて摺動自在に結合され、第１移
動子の各フインガーに結合された各金型分割片
は、径方向にのみ移動可能なように、その分割片
先端において、基体部材に摺動自在に結合され、
第２移動子の各フインガーに結合された各金型分
割片は、その後端において第１移動子の後端部に
当接されていることを特徴とする構成である。 The present invention provides a mold device that can stably maintain the alignment of the divided pieces of a split mold even when the end of a plastic tube is press-fitted. That is, the mold device for molding the end of a plastic tube according to the present invention has a first movable body in which several fingers having a tapered top surface and having a short height as they reach the tip are spaced apart from each other and arranged in a circular arrangement. The child and the second mover are in a state where the fingers of both movers are arranged alternately,
Each of the divided cylindrical molds is provided movably along the central axis direction of the circular arrangement, and the tapered upper surface of each finger of these sliders is configured to have a diameter reduced by the backward movement of these sliders. The divided pieces are slidably connected along the central axis direction of the circular arrangement, and each mold divided piece connected to each finger of the first mover is connected so that the divided pieces are movable only in the radial direction. one end is slidably coupled to the base member;
The structure is characterized in that each mold segment connected to each finger of the second mover is brought into contact with the rear end of the first mover at its rear end.
以下、図面により本発明を説明する。 The present invention will be explained below with reference to the drawings.
第１図は本発明の金型装置を示す斜視図であ
る。 FIG. 1 is a perspective view showing a mold apparatus of the present invention.
第２図は同上装置を示す縦断面図である。 FIG. 2 is a longitudinal sectional view showing the same device.
第３図並びに第４図は、第２図における―
断面図並びに―断面図である。 Figures 3 and 4 are the same as in Figure 2.
They are a cross-sectional view and a cross-sectional view.
第１図乃至第４図において、１は基体としての
支持軸であり、先端には基体部材２が取付けられ
ている。３はヘツドキヤツプであり、螺子４によ
り基体部材２に固定されている。このヘツドキヤ
ツプ３の後端部３１は、基体部材２の後端より突
出されている。 In FIGS. 1 to 4, reference numeral 1 denotes a support shaft as a base, and a base member 2 is attached to the tip. 3 is a head cap, which is fixed to the base member 2 with screws 4. A rear end portion 31 of the head cap 3 protrudes from the rear end of the base member 2.
５ａは第１移動子であり、リング部５１ａに周
方向に等角度を隔てて数本のフインガー５２ａ，
５２ａ…、図示するものにおいては、周方向に
120゜の角度を隔てて３本のフインガーが突設さ
れている。これらフインガー５２ａ，５２ａ…は
先端に至るほど背が低くされ、上面５３ａはテー
パ状であり、この上面には第３図並びに第４図に
示すように、係合用の突条５４ａが設けられてい
る。各フインガー５２ａの後端部下面側には切欠
溝５４０ａが設けられている。 5a is a first mover, and a ring portion 51a has several fingers 52a, spaced apart at equal angles in the circumferential direction.
52a..., in the illustrated case, in the circumferential direction
Three fingers are protruded at an angle of 120°. These fingers 52a, 52a... are made shorter as they reach their tips, and have tapered upper surfaces 53a, on which are provided protrusions 54a for engagement, as shown in FIGS. 3 and 4. There is. A cutout groove 540a is provided on the lower surface side of the rear end of each finger 52a.
５ｂは第２移動子であり、リング部５１ｂに周
方向に等角度を隔てて数本のフインガー５２ｂ，
５２ｂ…が設けられている。これらフインガー５
２，５２ｂ…の本数並びに上面５３ｂのテーパ角
度は第１移動子５ａのフインガー５２ａ，５２ａ
…と同じにされている。第２移動子５ｂのフイン
ガー５２ｂ，５２ｂ…のテーパ上面５３ｂにも、
第３図並びに第４図に示すように、係合用の突条
５４ｂが設けられている。 5b is a second mover, and the ring portion 51b has several fingers 52b, which are spaced at equal angles in the circumferential direction.
52b... are provided. these fingers 5
2, 52b... and the taper angle of the upper surface 53b are the fingers 52a, 52a of the first mover 5a.
It is equated with... Also, the tapered upper surface 53b of the fingers 52b, 52b... of the second mover 5b,
As shown in FIGS. 3 and 4, a projection 54b for engagement is provided.
第３図並びに第４図から明らかなように、第１
移動子５ａのフインガー５２ａ，５２ａ…の断面
形状は方形であり、下面５５ａは軸１の円形外面
に適合する円弧面である。第２移動子５ｂのフイ
ンガー５２ｂ，５２ｂ…の断面形状は、下部両側
に斜面５６ｂ，５６ｂを有し、かつ下面５５ｂが
軸１の外面に適合する円弧面とされた多角形であ
り、上記斜面５６ｂ，５６ｂには第１移動子５ａ
のフインガー５２ａの下部側面が接触されてい
る。 As is clear from Figures 3 and 4, the first
The cross-sectional shape of the fingers 52a, 52a, . The cross-sectional shape of the fingers 52b, 52b, . 56b, 56b has the first mover 5a.
The lower side surfaces of the fingers 52a are in contact with each other.
第１移動子５ａと第２移動子５ｂとは、軸１上
に軸方向へ移動自在に挿通され、両移動子のフイ
ンガーが第３図並びに第４図に示すように交互に
配置されると共に、第２図に示すように、第１移
動子５ａのリング部５１ａ内に第２移動子５ｂの
リング部５１ｂが収容されている。第１移動子５
ａのリング部５１ａの切欠溝５４０ａは、第２移
動子５ｂのリング部５１ｂを収容するために役立
つている。 The first mover 5a and the second mover 5b are inserted through the shaft 1 so as to be movable in the axial direction, and the fingers of both movers are arranged alternately as shown in FIGS. 3 and 4. As shown in FIG. 2, the ring portion 51b of the second mover 5b is accommodated within the ring portion 51a of the first mover 5a. First mover 5
The cutout groove 540a of the ring portion 51a of a is useful for accommodating the ring portion 51b of the second mover 5b.
６は第１移動子５ａのリング部５１ａに螺子７
により連結されたスリーブであり、軸挿通孔６１
０を備えた端板６１を有し、この端板６１は支持
軸１に挿通されている。８は油圧シリンダー（図
示せず）のピストン軸を示し、端板６１に結着さ
れている。９は第２移動子５ｂのリング部５１ｂ
に螺子１０により固定されたフランジである。１
１は油圧シリンダーであり、スリーブ６の端板６
１に支持され、そのピストン軸１１１は上記フラ
ンジ９に結着されている。 6 is a screw 7 attached to the ring portion 51a of the first mover 5a.
It is a sleeve connected by a shaft insertion hole 61.
0, and this end plate 61 is inserted into the support shaft 1. Reference numeral 8 indicates a piston shaft of a hydraulic cylinder (not shown), which is connected to the end plate 61. 9 is a ring portion 51b of the second mover 5b
This is a flange fixed by screws 10 to the flange. 1
1 is a hydraulic cylinder, and an end plate 6 of a sleeve 6
1, and its piston shaft 111 is connected to the flange 9.
１２は分割金型であり、プラスチツク管端部に
所定の受口を成形するための外面形状、寸法を有
する。この外面には、受口にゴムリング装着溝を
成形するための山部ｍと受口に逆テーパを賦与す
るための逆傾斜部ｔが存在し、山部ｍの箇所が最
大高さとなつている。図示のものにおいては、６
分割金型が用いられている。 Reference numeral 12 denotes a split mold, which has an outer surface shape and dimensions for molding a predetermined socket at the end of the plastic tube. This outer surface has a peak m for forming a rubber ring mounting groove in the socket and a reverse slope part t for giving a reverse taper to the socket, and the peak m has the maximum height. There is. In the illustrated example, 6
A split mold is used.
この分割金型１２は、第１種の分割片１２ａ，
１２ａ…と第２種の分割片１２ｂ，１２ｂ…との
交互組み合せにより構成されている。 This split mold 12 includes first type split pieces 12a,
12a... and second type divided pieces 12b, 12b...
第１種の各分割片１２ａ，１２ａ…は、第３図
に明瞭に表わされている通り、第１移動子の各フ
インガー５２ａ，５２ａ…の上面の係合用突条５
４ａにアリ溝１２１ａにおいて摺動自在に結合さ
れている。他方、第２種の各分割片１２ｂ，１２
ｂ…は、第２移動子の各フインガー５２ｂ，５２
ｂ…の上面の係合用突条５４ｂにアリ溝１２１ｂ
において摺動自在に結合されている。 As clearly shown in FIG. 3, each of the first type divided pieces 12a, 12a... is an engagement protrusion 5 on the upper surface of each finger 52a, 52a... of the first mover.
4a in a dovetail groove 121a in a slidable manner. On the other hand, each of the second type divided pieces 12b, 12
b... is each finger 52b, 52 of the second mover
b... Dovetail groove 121b on the engagement protrusion 54b on the upper surface
are slidably connected to each other.
第２図から明らかなように、第１種並びに第２
種各分割片１２ａ，…並びに１２ｂ，…の先端部
表面には切欠溝１２２が設けられ、それら分割片
１２ａ，…，１２ｂ，…の先端部がこの切欠溝１
２２において、ヘツドキヤツプ３の突出端部３１
内に納められている。 As is clear from Figure 2, type 1 and type 2
A notch groove 122 is provided on the front end surface of each of the divided pieces 12a, . . . and 12b, .
At 22, the protruding end 31 of the headcap 3
It is stored inside.
第１種分割片１２ａ，１２ａ…の先端と基体部
材２とは、径方向に摺動自在に結合されており、
この結合機構１３はフインガーと分割片との結合
機構と実質的に同じである。 The tips of the first type divided pieces 12a, 12a... and the base member 2 are slidably connected in the radial direction,
This coupling mechanism 13 is substantially the same as the coupling mechanism between the finger and the split piece.
第１種分割片１２ａ，１２ａ…は第１図に示す
通り、後端に至るほど狭巾とされ、第２種分割片
１２ｂ，１２ｂ…は同図に示す通り、後端に至る
ほど広巾とされている。 As shown in FIG. 1, the first type divided pieces 12a, 12a... are made narrower as they reach their rear ends, and the second type divided pieces 12b, 12b... are made wider as they reach their rear ends, as shown in the figure. has been done.
本発明装置において、第１種金型片１２ａ，１
２ａ…並びに第２種金型片１２ｂ，１２ｂ…の巾
変化に対する角度（第１図におけるθ１）、第１
種金型片１２ａと第２種金型片１２ｂとの交互配
置角度（第３図におけるθ２）、フインガー上面
５３ａまたは５３ｂのテーパ角度（第２図におけ
るθ３）との間には、一定の関係がある。 In the device of the present invention, the first type mold pieces 12a, 1
2a... and the angle with respect to the width change of the second type mold pieces 12b, 12b... (θ 1 in FIG. 1), the first
There is a constant relationship between the alternate arrangement angle of the seed mold piece 12a and the second type mold piece 12b (θ 2 in FIG. 3) and the taper angle of the finger upper surface 53a or 53b (θ 3 in FIG. 2). There is a relationship between
この関係は、金型装置についての以下に述べる
縮径操作の説明において明らかにする。 This relationship will be made clear in the following description of the diameter reduction operation for the mold apparatus.
金型装置の縮径操作においては、まず、油圧シ
リンダー１１が作動され、第５図Ａに示すよう
に、第２移動子５ｂは、その後端のフランジ９が
スリーブ６の端板６１の方向へ、後退移動され
る。この第２移動子５ｂの後退移動により、第５
図Ｂに示すように、第２種の金型片１２ｂが支持
軸１の中心に向つて降下していく。 In the diameter reduction operation of the mold device, first, the hydraulic cylinder 11 is activated, and as shown in FIG. , is moved backwards. This backward movement of the second mover 5b causes the fifth
As shown in FIG. B, the second type mold piece 12b descends toward the center of the support shaft 1.
上記の降下移動が完了した段階においては、第
５図Ａにおいて、点線で示す受口ｗの口径に対し
て、第２種金型片１２ｂの山部ｍは、その口径よ
りも内側に達する。 At the stage when the above-described downward movement is completed, the peak m of the second type mold piece 12b reaches inside the diameter of the socket w shown by the dotted line in FIG. 5A.
上記の操作後は、ピストン軸８がその油圧シリ
ンダーにより後退され、第５図Ａの状態に対し、
第２移動子５ｂのフインガー５２ｂ，…並びに第
１移動子５ａのフインガー５２ａ，…が第５図Ｃ
のように、同期状態で後退移動される。 After the above operation, the piston shaft 8 is retracted by its hydraulic cylinder, and the state shown in FIG.
The fingers 52b, ... of the second mover 5b and the fingers 52a, ... of the first mover 5a are shown in FIG.
, it is moved backwards in a synchronous state.
第２移動子５ｂのフインガー５２ｂ，…のテー
パ上面に摺動的に結合された第２種金型片１２ｂ
は、基体部材２には結合されていないから、第２
移動子５ｂの後退移動に伴い上記フインガー５２
ｂ，５２ｂ…のテーパ面から受ける水平分力のた
めに後退移動が可能である。他方、第１移動子５
ａのフインガー５２ａ，…のテーパ上面に摺動的
に結合された第１種金型片１２ａは、その先端部
において、基体部材２に径方向のみに移動するよ
うに結合されている（１３で示す）から、第１移
動子５ａの後退移動に伴い、軸１の中心に向つて
移動するだけである。 The second type mold piece 12b is slidably connected to the tapered upper surface of the fingers 52b, ... of the second mover 5b.
is not coupled to the base member 2, so the second
As the mover 5b moves backward, the finger 52
The backward movement is possible due to the horizontal force received from the tapered surfaces of b, 52b, . On the other hand, the first mover 5
The first type mold piece 12a that is slidably connected to the tapered upper surface of the fingers 52a, . ), the first moving element 5a simply moves toward the center of the shaft 1 as the first moving element 5a moves backward.
上記した第２移動子５ｂ並びに第１移動子５ａ
の同期的な後退移動に伴い、上記第２種金型片１
２ｂ，１２ｂ…の後退移動と、上記第１種金型片
１２ａ，１２ａ…の中心方向移動、すなわち縮径
移動とが平衡的に達成されるように、第１種金型
片１２ａ，１２ａ…並びに第２種金型片１２ｂ，
１２ｂ…の巾変化に対する角度（第１図における
θ１）、第１種金型片と第２種金型片との交互配
置角度（第３図におけるθ２）、フインガー上面
のテーパ角度（第２図におけるθ３）との間に
は、一定の関係が満されている。 The above-mentioned second mover 5b and first mover 5a
With the synchronous backward movement of , the second type mold piece 1
The first type mold pieces 12a, 12a... and second type mold piece 12b,
12b... (θ 1 in Fig. 1), the alternating arrangement angle of the first type mold piece and the second type mold piece (θ 2 in Fig. 3), the taper angle of the upper surface of the finger (θ 1 in Fig. 3), A certain relationship is satisfied between θ 3 ) in FIG.
この関係は、第５図Ｂから理解することができ
る。 This relationship can be understood from FIG. 5B.
第５図Ｂにおいて、点線は、第２種金型片１２
ｂが仮定的に△ｄだけ後退した状態を示し、この
後退により、第２種金型片１２ｂと第１種金型片
１２ａとの間には△Ａの隙間が生じ、この△Ａは
△Ａ＝tanθ１・△ｄ
で与えられる。 In FIG. 5B, the dotted line indicates the second type mold piece 12
b hypothetically indicates a state where it has retreated by Δd, and due to this retreat, a gap of ΔA is created between the second type mold piece 12b and the first type mold piece 12a, and this ΔA is △ It is given by A=tanθ 1 ·△d.
第１種金型片１２ａ，…の上記縮径方向はθ２
で規制され、この方向に対する隙間△Ｂは、△
Ａ／sinθ２であり、従つて、
△Ｂ＝ｔａｎθ１・△ｄ／ｓｉｎθ２
である。 The diameter reduction direction of the first type mold pieces 12a, ... is θ 2
The gap △B in this direction is regulated by △
A/sin θ 2 , and therefore ΔB=tan θ 1 ·Δd/sin θ 2 .
他方、第１移動子５ａと第２移動子５ｂとは、
上記した通り同期的に後退移動するから、第２種
金型片１２ｂ，…の上記△ｄの後退移動を発生さ
せる第２移動子５ｂの後退移動に伴い第１移動子
５ａも△ｄだけ移動し、この第１移動子５ａの後
退移動に伴う第１種金型片１２ａ，…縮径移動量
△Ｃは
△Ｃ＝tanθ３・△ｄ
である。 On the other hand, the first mover 5a and the second mover 5b are
As described above, since the backward movement occurs synchronously, the first mover 5a also moves by △d as the second mover 5b moves backward, which causes the second type mold pieces 12b, . . . to move backward by the amount △d. However, the diameter reduction movement amount ΔC of the first type mold piece 12a, . . . due to the backward movement of the first mover 5a is ΔC=tanθ 3 ·Δd.
上記第１種金型片の縮径移動と第２種金型片の
後退移動との平衡条件は△Ｂ≧△Ｃであり、
従つて
tanθ１／sinθ２≧tanθ３
が成立する。本発明装置においては、この関係が
満されるように、θ１，θ２，θ３が設定されて
いる。 The equilibrium condition between the diameter reduction movement of the first type mold piece and the backward movement of the second type mold piece is △B≧△C, and therefore, tanθ 1 /sin θ 2 ≧ tan θ 3 holds true. In the device of the present invention, θ 1 , θ 2 , and θ 3 are set so that this relationship is satisfied.
第５図Ｃで示す操作段階において、上記した通
り、ピストン軸８の後退により、第２種金型片１
２ｂ，…が後退するが（すなわち、成形受口ｗか
ら脱出するが）、これら金型片１２ｂ，…の山部
ｍが受口ｗの口径に対し低い位置になつているか
ら、同脱出はスムースに達成される。 In the operation stage shown in FIG. 5C, as described above, the second type mold piece 1 is
2b, ... retreat (that is, escape from the molding socket w), but since the peaks m of these mold pieces 12b, ... are at a lower position relative to the diameter of the socket w, the escape does not occur. achieved smoothly.
上記の説明において、第１移動子のフインガー
上面のテーパ角、並びに第２移動子のフインガー
の上面のテーパ角は共に等しいとし、その角度を
θ３として、上記の式tanθ１／sinθ２≧tanθ
３を導いた。 In the above description, it is assumed that the taper angle of the upper surface of the finger of the first mover and the taper angle of the upper surface of the finger of the second mover are both equal, and that angle is θ 3 , and the above formula tanθ 1 /sinθ 2 ≧tanθ
led to 3 .
しかし、上記の両テーパ角は、異ならしめるこ
ともでき、この場合、上記に対応する関係式は、
今までに述べた装置の動作から、容易に求めるこ
とができる。 However, the above two taper angles can also be made different, in which case the relational expression corresponding to the above is:
This can be easily determined from the operation of the device described so far.
本発明装置によつて、プラスチツク管端部に受
口を成形するには、プラスチツク管端部を加熱
し、この加熱端部を、金型装置の分割金型１２上
に、ヘツドキヤツプ３側から圧入する方法、或い
は、金型装置の分割金型１２上並びにヘツドキヤ
ツプ３上にわたつて外金型を配設し、外金型と金
型装置との間の間隙（この間隙は、プラスチツク
管の管壁厚さに等しいか、或いはやや大きくす
る）に、プラスチツク管の加熱端部を圧入する方
法を用いることができる。 In order to form a socket at the end of a plastic tube using the device of the present invention, the end of the plastic tube is heated, and the heated end is press-fitted onto the split mold 12 of the mold device from the head cap 3 side. Alternatively, an outer mold is disposed over the split mold 12 and the head cap 3 of the mold apparatus, and the gap between the outer mold and the mold apparatus (this gap is defined by the length of the plastic tube). A method of press-fitting the heated end of the plastic tube into a wall thickness equal to or slightly greater than the wall thickness can be used.
第６図Ａ並びに第６図Ｂは後者の方法による受
口の成形状態を示している。 FIGS. 6A and 6B show how the socket is formed by the latter method.
第６図Ａ並びに第６図Ｂにおいて、Ｉは前記に
おいて説明した金型装置であり、内金型構造体と
して用いられている。Ｏは外金型である。 In FIGS. 6A and 6B, I is the mold device described above, which is used as an inner mold structure. O is an outer mold.
使用したプラスチツク管は口径150mmφ、厚さ
8.9mmの塩化ビニル管である。内金型構造体にお
ける前記した各角度θ１，θ２，θ３はそれぞれ
θ１＝３゜〜11゜，θ２＝60゜，θ３＝４゜〜12
゜である。内金型構造体と外金型との間の隙間は
10.5mmである。 The plastic tube used has a diameter of 150mmφ and a thickness
It is 8.9mm PVC pipe. The angles θ 1 , θ 2 , and θ 3 in the inner mold structure are θ 1 =3° to 11°, θ2 = 60°, and θ3 = 4° to 12°, respectively.
It is ゜. The gap between the inner mold structure and the outer mold is
It is 10.5mm.
第６図Ａは、加熱されたプラスチツク管端部を
１次圧力P1で圧入中の状態を示し、内金型構造体
のゴムリング溝成形用山部ｍと、逆テーパ面部ｔ
等のために、１次圧力P1は500〜1000Kgに達し
た。 FIG. 6A shows the state in which the heated plastic tube end is being press-fitted at the primary pressure P 1 , and the rubber ring groove forming crest m of the inner mold structure and the reverse tapered surface part t are shown in FIG.
etc., the primary pressure P 1 reached 500-1000Kg.
第６図Ｂは、２次圧力P2による加圧中の状態を
示している。この２次加圧は、１次圧力下での圧
入だけでは、外金型内周面とプラスチツク管外と
の間及び内金型構造体の谷部とプラスチツク管内
面との間に隙間が残るので、この隙間を圧潰する
ことを意図している。この２次加圧力P2は10000
Kgであつた。 FIG. 6B shows the state during pressurization by the secondary pressure P2 . If this secondary pressurization is performed only by press-fitting under the primary pressure, gaps will remain between the inner peripheral surface of the outer mold and the outside of the plastic tube, and between the troughs of the inner mold structure and the inner surface of the plastic tube. Therefore, the intention is to crush this gap. This secondary pressure P 2 is 10000
It was Kg.
上記のように、２次圧力のみならず、１次圧力
も相当に高圧であるために、内金型構造体の第１
種金型片、第２種金型片は高い外圧を受圧する。 As mentioned above, not only the secondary pressure but also the primary pressure is considerably high.
The seed mold piece and the second type mold piece receive high external pressure.
しかし、第２図に示す通り、第１種金型片１２
ａ，…においては、その先端において基体部材２
に縮径方向にのみ移動可能なように結合されてい
るから、後退移動はない。この第１種金型片１２
ａ，…は、第１移動子５ａのフインガー５２ａ，
…に、テーパ面５３ａ，…で接触されているか
ら、このテーパ面５３ａのテーパ角度θ３に応じ
て発生する垂直分力で、第１移動子５ａのフイン
ガー５２ａ，…を支持軸１に押付けることにな
る。 However, as shown in FIG.
a,..., the base member 2 is located at the tip thereof.
There is no backward movement because the two are connected so that they can move only in the direction of diameter reduction. This first type mold piece 12
a,... are the fingers 52a of the first mover 5a,
... are in contact with the taper surfaces 53a, ..., so the fingers 52a, ... of the first mover 5a are pushed against the support shaft 1 by the vertical force generated according to the taper angle θ 3 of the tapered surfaces 53a. I will attach it.
他方、第２種金型片１２ｂ，…においては、第
１種金型片１２ａ，…と異なり、基体部材２との
結合がなく、上記第１移動子５ａの後端のリング
部５１ａに当接されているだけである。而るに、
この第１移動子５ａは、上記したように、プラス
チツク管端部の圧入力に応じて第１種金型片１２
ａ，…から受圧する垂直分力によつて、支持軸１
に押付けられているから、第１移動子５ａの固定
状態を、ピストン軸８のみに頼る場合に較べて安
定化できる。従つて、第２種金型片１２ｂ，…
も、プラスチツク管端部の圧入力に対して、後退
なく、安定に固定できる。 On the other hand, unlike the first type mold pieces 12a, . . . , the second type mold pieces 12b, . It's just being touched. In fact,
As described above, this first mover 5a moves the first type mold piece 12 in response to the pressing force at the end of the plastic tube.
Due to the vertical force received from a,..., the support shaft 1
Since the first moving element 5a is pressed against the piston shaft 8, the fixed state of the first moving element 5a can be made more stable than when relying only on the piston shaft 8. Therefore, the second type mold pieces 12b,...
Also, it can be stably fixed without backing up against the pressure force at the end of the plastic tube.
第２種金型片１２ｂ，…の固定状態は、第２種
金型片１２ｂ，…を、フインガー５２ｂ，…のテ
ーパ面５３ｂ，…で支承する第２移動子５ｂの固
定状態、並びに第２種金型片１２ｂ，…の後端
を、リング部５１ａにおいて支承する第１移動子
５ａの固定状態に関係するから、ピストン軸１１
１に対し、第２種金型片１２ｂ…の固定安定化の
ための負担を軽減出来る。 The fixed state of the second type mold pieces 12b, . . . is the fixed state of the second mover 5b, which supports the second type mold pieces 12b, . The piston shaft 11 is related to the fixed state of the first mover 5a, which supports the rear ends of the seed mold pieces 12b,... in the ring portion 51a.
1, the burden for fixing and stabilizing the second type mold pieces 12b can be reduced.
なお、第１種金型片１２ａ…第２種金型片１２
ｂ…第１種移動子５ａ及び第２種移動子５ｂは上
記θ１，θ２，θ３の角度を与えられて結合して
おり、第１種金型片１２ａ…と第２種金型片１２
ｂの周接側面は相互により高い周接圧力を生みな
がらプラスチツク管端部の圧入を受け止めるとと
もに、圧入力に応じてこれらの結合部材の結合状
態は均衡して強まる。 Note that the first type mold piece 12a...the second type mold piece 12
b...The first type mover 5a and the second type mover 5b are coupled at the angles θ 1 , θ 2 , θ 3 above, and the first type mold piece 12a... and the second type mold Piece 12
The circumferential side surfaces of b receive the press-fitting of the end of the plastic tube while creating a higher circumferential pressure with each other, and the bonding condition of these coupling members is balanced and strengthened in accordance with the press-fitting force.
以上の説明から明らかな通り、本発明装置にお
いては、管端部の圧入力を有効に利用でき、金型
面の集合状態が良く、金型外面の精度が高く維持
されるので、プラスチツク管端部の受口成形が寸
法精度良く行なえ、またプラスチツク管端部の圧
入力に対応させるため、金型装置に高圧の油圧装
置をも必要としないなど種々の効果を有する。 As is clear from the above explanation, in the device of the present invention, the press force at the tube end can be effectively used, the mold surfaces are well assembled, and the precision of the mold outer surface is maintained at a high level. This method has various advantages, such as making it possible to perform socket molding at the end of the plastic tube with high dimensional accuracy, and eliminating the need for a high-pressure hydraulic system in the mold device since it corresponds to the pressing force at the end of the plastic tube.
第１図は本発明に係るプラスチツク管端部の拡
径用金型装置を示す斜視図、第２図は同上装置を
示す縦断面図、第３図並びに第４図は第２図にお
ける―断面図並びに―断面図、第５図
Ａ、第５図Ｂ並びに第５図Ｃは本発明装置の作動
状態を示す説明図、第６図Ａ並びに第６図Ｂは本
発明装置を使用したプラスチツク管端部の受口成
形状態を示す説明図である。
図において、１は軸、２は基体部材、５ａは第
１移動子、５１ａは第１移動子５ａのリング部、
５２ａ，５２ａ…は第１移動子５ａのフインガ
ー、５３はフインガー５２ａのテーパ面、５４ａ
は係合用突条、５ｂは第２移動子、５２ｂ，５２
ｂ…は第２移動子のフインガー、５３ｂはフイン
ガー５２ｂのテーパ面、５４ｂは係合用突条、１
２ａ，…並びに１２ｂ，…は分割金型片、１２１
ａ並びに１２１ｂは分割金型片１２ａ並びに１２
ｂの係合用溝、１３は分割金型片１２ａと基体部
材２との摺動的結合部、Ｉは内金型構造体、Ｏは
外金型である。
Fig. 1 is a perspective view showing a mold device for expanding the diameter of the end of a plastic tube according to the present invention, Fig. 2 is a longitudinal sectional view showing the same device, and Figs. 5A, 5B and 5C are explanatory diagrams showing the operating state of the device of the present invention, and FIGS. 6A and 6B are plastic tubes using the device of the present invention. It is an explanatory view showing the socket molding state of the end part. In the figure, 1 is a shaft, 2 is a base member, 5a is a first mover, 51a is a ring part of the first mover 5a,
52a, 52a... are fingers of the first mover 5a, 53 is a tapered surface of the finger 52a, 54a
is an engagement protrusion, 5b is a second mover, 52b, 52
b... is the finger of the second mover, 53b is the tapered surface of the finger 52b, 54b is the engagement protrusion, 1
2a,... and 12b,... are split mold pieces, 121
a and 121b are split mold pieces 12a and 12
b is an engagement groove, 13 is a sliding joint between the split mold piece 12a and the base member 2, I is an inner mold structure, and O is an outer mold.
Claims (1)
ンガーが数本、相互に間隔を隔て、かつ円配列で
設けられた第１移動子並びに第２移動子とが、両
移動子のフインガーが交互に配置された状態で、
上記円配列の中心軸方向に沿つて移動自在に設け
られ、これら移動子の各フインガーのテーパ上面
には、これら移動子の後方移動によつて縮径され
る構成の分割筒形金型の各分割片が上記円配列の
中心軸方向に沿つて摺動自在に結合され、第１移
動子の各フインガーに結合された各金型分割片
は、径方向にのみ移動可能なように、その分割片
先端において、基体部材に摺動自在に結合され、
第２移動子の各フインガーに結合された各金型分
割片は、その後端において第１移動子の後端部に
当接されていることを特徴とするプラスチツク管
端部の成形用金型装置。 ２ 全金型分割片には、後端部表面に、成形すべ
きプラスチツク管端の受口にゴムリング装着溝を
成形するための凸部が、該凸部より前方の表面に
は、同上受口に逆テーパ面を成形するため逆テー
パ面がそれぞれ設けられ、該金型を内金型構造体
として、これに対応する外金型を備えてなる特許
請求の範囲第１項記載のプラスチツク管端部の成
形用金型装置。[Claims] 1. A first mover and a second mover, each of which has several fingers with a tapered top surface and whose height is short toward the tip, are spaced apart from each other and arranged in a circular manner, and the first and second movers are arranged in a circular arrangement. With the child fingers arranged alternately,
Each of the divided cylindrical molds is provided movably along the central axis direction of the circular arrangement, and the tapered upper surface of each finger of these sliders is configured to have a diameter reduced by the backward movement of these sliders. The divided pieces are slidably connected along the central axis direction of the circular arrangement, and each mold divided piece connected to each finger of the first mover is connected so that the divided pieces are movable only in the radial direction. one end is slidably coupled to the base member;
A mold device for molding an end of a plastic tube, characterized in that each mold segment connected to each finger of the second mover is brought into contact with the rear end of the first mover at its rear end. . 2. On the rear end surface of each mold segment, there is a protrusion for forming a groove for attaching a rubber ring to the socket for the end of the plastic tube to be molded, and on the surface in front of the protrusion, there is a receiving groove as described above. The plastic tube according to claim 1, wherein each of the plastic tubes is provided with a reverse tapered surface in order to form a reverse tapered surface at the mouth, the mold is used as an inner mold structure, and a corresponding outer mold is provided. Mold equipment for end forming.
Priority Applications (26)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14740278A JPS5573513A (en) | 1978-11-28 | 1978-11-28 | Metal mold device for forming end of plastic pipe |
| PH23051A PH16346A (en) | 1978-10-03 | 1979-09-20 | Method of forming a socket end on a plastic pipe and a molding device for use of the method |
| NL7907080A NL7907080A (en) | 1978-10-03 | 1979-09-24 | METHOD FOR TREATING THE END OF A PLASTIC PIPE TO FORM A PIPE END SOCKET; AND A FORMING DEVICE SUITABLE FOR CARRYING OUT THIS METHOD. |
| AU51194/79A AU530595B2 (en) | 1978-10-03 | 1979-09-26 | Moulding pipe socket |
| IN1018/CAL/79A IN151566B (en) | 1978-10-03 | 1979-09-27 | |
| CH872279A CH643772A5 (en) | 1978-10-03 | 1979-09-28 | METHOD FOR MOLDING AN END BUSHING ON A PLASTIC PIPE AND MOLDING DEVICE FOR CARRYING OUT THE METHOD. |
| AR278249A AR221248A1 (en) | 1978-10-03 | 1979-09-28 | A MOLDING DEVICE TO ELABORATE THE END OF A TUBE OF PLASTIC MATERIAL TO FORM A PLUG AT THIS END |
| US06/080,035 US4279853A (en) | 1978-10-03 | 1979-09-28 | Method of forming a socket end on a plastic pipe and a molding device for use of the method |
| IT50411/79A IT1162676B (en) | 1978-10-03 | 1979-09-28 | METHOD FOR OBTAINING AN EXTREMITY OF GLASS JOINT IN A PLASTIC MATERIAL AND SHAPING DEVICE TO BE USED FOR THAT METHOD |
| CA000336731A CA1136818A (en) | 1978-10-03 | 1979-10-01 | Method of forming a socket end on a plastic pipe and a molding device for use of the method |
| DK410379A DK410379A (en) | 1978-10-03 | 1979-10-01 | PROCEDURE FOR THE FORMATION OF SUBSTANCES ON ANIMAL PIPE PIPES AND A FORMING DEVICE FOR USE IN EXERCISING THE PROCEDURE |
| MX179488A MX150341A (en) | 1978-10-03 | 1979-10-02 | IMPROVEMENTS IN METHOD TO FORM A PLUG END IN A PLASTIC TUBE AND A MOLDING DEVICE TO USE THE METHOD |
| NZ191733A NZ191733A (en) | 1978-10-03 | 1979-10-02 | Pipe end moulding core and moulding method |
| SU792835966A SU1215609A3 (en) | 1978-11-28 | 1979-10-02 | Moulding device for manufacturing front coupling from plastic pipe |
| FR7924533A FR2437924B1 (en) | 1978-10-03 | 1979-10-02 | METHOD AND APPARATUS FOR MOLDING PLASTIC TUBE INTERLOCKING TULIP |
| SE7908130A SE431525B (en) | 1978-10-03 | 1979-10-02 | SET AND DEVICE FOR TREATING THE END OF A PLASTROR FOR PICTURE OF A RUBBER SHEET |
| AT0644679A AT390399B (en) | 1978-10-03 | 1979-10-02 | METHOD AND DEVICE FOR FORMING A SLEEVE AT THE END OF A PLASTIC PIPE |
| BE0/197434A BE879147A (en) | 1978-10-03 | 1979-10-02 | METHOD FOR FORMING A BUSHING AT THE END OF A PLASTIC TUBE AND MOLDING APPARATUS FOR IMPLEMENTING SAME |
| ES484661A ES484661A1 (en) | 1978-10-03 | 1979-10-02 | Method of forming a socket end on a plastic pipe and a molding device for use of the method |
| DE2940143A DE2940143C2 (en) | 1978-10-03 | 1979-10-03 | Process for producing a connecting sleeve at the end of a cylindrical plastic tube and device for carrying it out |
| BR7906380A BR7906380A (en) | 1978-10-03 | 1979-10-03 | METHOD OF FORMING A SOCKET END IN A PLASTIC TUBE AND A MOLD DEVICE FOR USE OF THE METHOD |
| DD79216004A DD146567A5 (en) | 1978-10-03 | 1979-10-03 | METHOD AND DEVICE FOR FORMING A JACK |
| PL1979218710A PL123529B1 (en) | 1978-10-03 | 1979-10-03 | Method of transformation of end of the plastic tube into socket fitting and forming apparatus therefor |
| GB7934303A GB2033826B (en) | 1978-10-03 | 1979-10-03 | Method of forming a socket end on a plastic pipe and a moulding device for use of the method |
| RO98839A RO84372B (en) | 1978-10-03 | 1979-10-03 | Process and device for forming the end pipe joint of a plastic pipe |
| US06/250,036 US4412802A (en) | 1978-10-03 | 1981-04-01 | Molding device for forming a socket end on a plastic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14740278A JPS5573513A (en) | 1978-11-28 | 1978-11-28 | Metal mold device for forming end of plastic pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5573513A JPS5573513A (en) | 1980-06-03 |
| JPS6238135B2 true JPS6238135B2 (en) | 1987-08-17 |
Family
ID=15429468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14740278A Granted JPS5573513A (en) | 1978-10-03 | 1978-11-28 | Metal mold device for forming end of plastic pipe |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5573513A (en) |
| SU (1) | SU1215609A3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6022308U (en) * | 1983-07-20 | 1985-02-15 | アロン化成株式会社 | Core mold for injection molding |
-
1978
- 1978-11-28 JP JP14740278A patent/JPS5573513A/en active Granted
-
1979
- 1979-10-02 SU SU792835966A patent/SU1215609A3/en active
Also Published As
| Publication number | Publication date |
|---|---|
| SU1215609A3 (en) | 1986-02-28 |
| JPS5573513A (en) | 1980-06-03 |
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