JPS6235370B2 - - Google Patents
Info
- Publication number
- JPS6235370B2 JPS6235370B2 JP57136170A JP13617082A JPS6235370B2 JP S6235370 B2 JPS6235370 B2 JP S6235370B2 JP 57136170 A JP57136170 A JP 57136170A JP 13617082 A JP13617082 A JP 13617082A JP S6235370 B2 JPS6235370 B2 JP S6235370B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- film tube
- air supply
- resin
- film
- 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
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】
本発明は、遠心成形により樹脂管を得るところ
の遠心成形方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centrifugal molding method for obtaining a resin tube by centrifugal molding.
遠心成形方法は、水平軸心の周りに回転可能な
筒型の内周面上で樹脂管を遠心成形する方法であ
る。このようにして筒型内に成形した樹脂管の脱
型は、従来、筒型に対して樹脂管を水平軸心方向
に抜出することによつて行なつていた。このよう
な従来の脱型（抜出）によると、筒型内周面と樹
脂管外周面との面接触による摩擦抵抗が大である
ことから、大きな引抜き力が必要になり、場合に
よつては充分に硬化していない樹脂管の変形を招
くことになる。そこで別の脱型方法として、例え
ば特開昭53−59762号公報に見られるように、回
転型（筒型）を分割型とし、この回転型の内周面
上に外側フルムチユーブを展敷したのち、この外
側フイルムチユーブ上に樹脂管を遠心成形し、そ
して樹脂管の内側に内側フイルムチユーブを展敷
したのち、この内側フイルムチユーブ内を加圧
し、膨らませた内側フイルムチユーブを樹脂管の
内周面に圧接し、この樹脂管の形状維持をはかつ
た状態で、回転型を分割して脱型するようにして
いる。 The centrifugal molding method is a method in which a resin tube is centrifugally molded on the inner peripheral surface of a cylindrical tube that is rotatable around a horizontal axis. Conventionally, the resin pipe molded into a cylindrical mold is removed from the mold by pulling out the resin pipe from the cylindrical mold in the horizontal axis direction. According to such conventional demolding (extraction), the frictional resistance due to the surface contact between the inner peripheral surface of the cylindrical mold and the outer peripheral surface of the resin tube is large, so a large pulling force is required, and in some cases, This will lead to deformation of the resin tube, which has not been sufficiently cured. Therefore, as another method for removing the mold, for example, as seen in Japanese Patent Application Laid-open No. 53-59762, the rotary mold (cylindrical mold) is made into a split mold, and an outer full tube is spread on the inner circumferential surface of this rotary mold. A resin tube is centrifugally molded onto this outer film tube, and an inner film tube is spread inside the resin tube.The inside of this inner film tube is pressurized and the inflated inner film tube is placed on the inner peripheral surface of the resin tube. The rotary mold is divided into parts and removed from the mold while maintaining the shape of the resin pipe.
しかし、上記の従来方式によると、回転型の内
周面上に外側フイルムチユーブをきれいに展敷で
きないことから、製品、すなわち樹脂管の外面に
しわなどが発生することになる。また回転型を分
解、組立てることは大変な作業であれ、相応の装
置、ならびに作業時間が必要となる。 However, according to the above-mentioned conventional method, the outer film tube cannot be spread neatly on the inner circumferential surface of the rotary mold, so that wrinkles and the like occur on the outer surface of the product, that is, the resin tube. Furthermore, disassembling and assembling a rotary mold is a difficult task, requiring appropriate equipment and time.
本発明の目的とするところは、筒型を分解しな
い樹脂管の抜出方式でありながら、この樹脂管の
抜出を、摩擦抵抗が少ない状態で容易に行なえる
遠心成形方法を提供する点にある。 An object of the present invention is to provide a centrifugal molding method that allows the resin tube to be easily extracted with little frictional resistance, while being a method for extracting the resin tube without disassembling the cylindrical shape. be.
上記目的を達成するために本発明の遠心成形方
法は、袋状のフイルムチユーブを、空気供給管に
外嵌すると共に、その開口部をシール固定具によ
り空気供給管に固定し、前記フイルムチユーブを
水平軸心の周りに回転可能な筒型内に挿入し、次
いで空気供給管からの空気供給によりフイルムチ
ユーブ内を加圧し、該フイルムチユーブを膨らま
せて筒型内周面上に密着させ、そして前記シール
固定具を外し空気供給管を抜出し、次いでフイル
ムチユーブ内に樹脂管を遠心成形し、その後、フ
イルムチユーブ内に吸引管を挿入すると共に、そ
の開口部をシール固定具により吸引管に固定し、
次いで吸引管を介しての吸引によりフイルムチユ
ーブ内を減圧した状態で、該フイルムチユーブを
樹脂管と共に筒型から抜出している。 In order to achieve the above object, the centrifugal molding method of the present invention involves fitting a bag-shaped film tube onto an air supply pipe, and fixing the opening of the film tube to the air supply pipe using a seal fixture. The film tube is inserted into a cylinder rotatable around the horizontal axis, and then the inside of the film tube is pressurized by air supply from an air supply pipe to inflate the film tube and bring it into close contact with the inner peripheral surface of the cylinder. Remove the seal fixture and pull out the air supply tube, then centrifugally mold a resin tube inside the film tube, then insert the suction tube into the film tube, and fix the opening to the suction tube with the seal fixture,
Next, while the pressure inside the film tube is reduced by suction through the suction tube, the film tube is extracted from the cylindrical mold together with the resin tube.
かかる方法によると、抜出時の摩擦抵抗はフイ
ルムチユーブと筒型との面接触であることから、
樹脂管が直接筒型に面接触する従来の抜出方法に
比べて該摩擦抵抗を小さくできる。またフイルム
チユーブ内を減圧することによつて、樹脂管を縮
径作用させることができる。したがつて樹脂管を
他端側に押すことによつて、該樹脂管を変形させ
ることなく容易に脱型できる。 According to this method, since the frictional resistance during extraction is due to the surface contact between the film tube and the cylindrical shape,
The frictional resistance can be reduced compared to the conventional extraction method in which the resin tube is brought into direct surface contact with the cylindrical shape. Further, by reducing the pressure inside the film tube, the diameter of the resin tube can be reduced. Therefore, by pushing the resin tube toward the other end, it can be easily demolded without deforming the resin tube.
以下、本発明の一実施例を図面に基づいて説明
する。第１図において１は非分解一体式の筒型
で、複数個の輪体２に支持されて水平軸心３の周
りに回転可能であり、また両端には端面治具４が
取付けられている。５は袋状のフイルムチユーブ
で、空気供給管６に外嵌されると共に、その開口
部がシール固定具７を介して該空気供給管６に固
定されている。この空気供給管６内には空気供給
路８が形成され、さらに複数の空気噴出孔９を有
する。先ず、フイルムチユーブ５を取付けた空気
供給管６を筒型１内に挿入する。次いで空気供給
路８から空気噴出孔９を介してフイルムチユーブ
５内に空気を供給し、第２図に示すようにこのフ
イルムチユーブ５を加圧し、膨らませて筒型１の
内周面上に均一に密着させる。その後、シール固
定具７を外すと共に空気供給管６を抜出する。そ
して第３図に示すように、フイルムチユーブ５の
開口部を筒体１０により保持したのち、筒型１を
回転させた状態で、筒型１内のフイルムチユーブ
５内に樹脂を供給し、樹脂管１１を遠心成形す
る。その後、第４図に示すように、フイルムチユ
ーブ５内、すなわち樹脂管１１内に吸引管１２を
配置すると共に、フイルムチユーブ５の開口部を
シール固定具１３により該吸引管１２側に固定す
る。次いで吸引路１４ならびに吸引孔１５を介し
ての吸引によりフイルムチユーブ５内を減圧す
る。この減圧力によつて樹脂管１１は縮径され、
フイルムチユーブ５の筒型内周面に対する面圧が
減少される。そして樹脂管１１を押して筒型１か
ら抜出させるのであるが、そのときの摩擦抵抗は
筒型１の内周面とフイルムチユーブ５の外周面と
の間の小さなものとなる。 Hereinafter, one embodiment of the present invention will be described based on the drawings. In Fig. 1, reference numeral 1 is a non-disassembly integral cylinder type, which is supported by a plurality of wheels 2 and is rotatable around a horizontal axis 3, and end jigs 4 are attached to both ends. . A bag-shaped film tube 5 is fitted onto the air supply pipe 6 and its opening is fixed to the air supply pipe 6 via a seal fixture 7. An air supply path 8 is formed within the air supply pipe 6, and further includes a plurality of air ejection holes 9. First, the air supply pipe 6 to which the film tube 5 is attached is inserted into the cylindrical mold 1. Next, air is supplied into the film tube 5 from the air supply path 8 through the air jet hole 9, and as shown in FIG. Closely contact. Thereafter, the seal fixture 7 is removed and the air supply pipe 6 is pulled out. As shown in FIG. 3, after the opening of the film tube 5 is held by the cylindrical body 10, resin is supplied into the film tube 5 inside the cylindrical mold 1 while the cylindrical mold 1 is rotated. Tube 11 is centrifugally formed. Thereafter, as shown in FIG. 4, the suction tube 12 is placed inside the film tube 5, that is, inside the resin tube 11, and the opening of the film tube 5 is fixed to the suction tube 12 side with a seal fixture 13. Next, the pressure inside the film tube 5 is reduced by suction through the suction path 14 and the suction hole 15. The diameter of the resin pipe 11 is reduced by this reduced pressure,
The surface pressure on the cylindrical inner peripheral surface of the film tube 5 is reduced. The resin tube 11 is then pushed and pulled out from the cylinder mold 1, but the frictional resistance at this time is small between the inner peripheral surface of the cylinder mold 1 and the outer peripheral surface of the film tube 5.
以上述べた本発明における遠心成形方法による
と、抜出時の摩擦抵抗はフイルムチユーブと筒型
との面接触であることから、樹脂管が直接筒型に
面接触する従来の抜出方法に比べて該摩擦抵抗を
小さくできる。またフイルムチユーブ内を減圧す
ることによつて、樹脂管を縮径させ、フイルムチ
ユーブの筒型内周面に対する面圧を減少させるこ
とができる。したがつて樹脂管を他端側に押すこ
とによつて、該樹脂管を変形させることなく容易
に脱型できる。なお最初にフイルムチユーブに膨
らますことで筒型内周面にきれいに密着でき、外
面にしわのない樹脂管を成形できる。 According to the centrifugal molding method of the present invention described above, the frictional resistance during extraction is due to the surface contact between the film tube and the cylindrical mold, compared to the conventional extraction method in which the resin tube is in direct surface contact with the cylindrical mold. This can reduce the frictional resistance. Further, by reducing the pressure inside the film tube, the diameter of the resin tube can be reduced, and the surface pressure on the cylindrical inner circumferential surface of the film tube can be reduced. Therefore, by pushing the resin tube toward the other end, it can be easily demolded without deforming the resin tube. Note that by first inflating the film into a tube, it can be tightly adhered to the inner circumferential surface of the cylindrical shape, and a resin tube without wrinkles on the outer surface can be formed.
図面は本発明の一実施例を示し、第１図〜第４
図は夫々各過程を示す縦断側面図である。
１……筒型、２……輪体、３……水平軸心、４
……端面治具、５……フイルムチユーブ、６……
空気供給管、７……シール固定具、８……空気供
給路、９……空気噴出孔、１０……筒体、１１…
…樹脂管、１２……吸引管、１３……シール固定
具、１４……吸引路、１５……吸引孔。
The drawings show one embodiment of the present invention, and FIGS.
The figures are longitudinal side views showing each process. 1...Cylindrical shape, 2...Ring body, 3...Horizontal axis, 4
...End face jig, 5...Film tube, 6...
Air supply pipe, 7...Seal fixture, 8...Air supply path, 9...Air jet hole, 10...Cylinder, 11...
...Resin pipe, 12...Suction tube, 13...Seal fixture, 14...Suction path, 15...Suction hole.
Claims (1)
嵌すると共に、その開口部をシール固定具により
空気供給管に固定し、前記フイルムチユーブを水
平軸心の周りに回転可能な筒型内に挿入し、次い
で空気供給管からの空気供給によりフイルムチユ
ーブ内を加圧し、該フイルムチユーブを膨らませ
て筒型内周面上に密着させ、そして前記シール固
定具を外し空気供給管を抜出し、次いでフイルム
チユーブ内に樹脂管を遠心成形し、その後、フイ
ルムチユーブ内に吸引管を挿入すると共に、その
開口部をシール固定具により吸引管に固定し、次
いで吸引管を介しての吸引によりフイルムチユー
ブ内を減圧した状態で、該フイルムチユーブを樹
脂管と共に筒型から抜出する遠心成形方法。1. Fitting a bag-shaped film tube onto the air supply pipe, fixing its opening to the air supply pipe with a seal fixture, and inserting the film tube into a cylindrical mold that can rotate around a horizontal axis. Then, the inside of the film tube is pressurized by air supply from the air supply pipe, the film tube is inflated and brought into close contact with the inner peripheral surface of the cylindrical shape, and the seal fixture is removed and the air supply pipe is pulled out. A resin tube is centrifugally molded inside the film tube, and then a suction tube is inserted into the film tube, and its opening is fixed to the suction tube with a seal fixture, and then the pressure inside the film tube is reduced by suction through the suction tube. A centrifugal molding method in which the film tube is extracted from the cylindrical mold together with the resin tube in this state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13617082A JPS5926229A (en) | 1982-08-03 | 1982-08-03 | Centrifugal molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13617082A JPS5926229A (en) | 1982-08-03 | 1982-08-03 | Centrifugal molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5926229A JPS5926229A (en) | 1984-02-10 |
| JPS6235370B2 true JPS6235370B2 (en) | 1987-08-01 |
Family
ID=15168955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13617082A Granted JPS5926229A (en) | 1982-08-03 | 1982-08-03 | Centrifugal molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5926229A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0228396Y2 (en) * | 1986-11-06 | 1990-07-30 | ||
| JP2506240B2 (en) * | 1991-06-29 | 1996-06-12 | 黒崎窯業株式会社 | Reduction method of tapping slag outflow in electric furnace |
| JP5516840B2 (en) * | 2008-10-24 | 2014-06-11 | トヨタ自動車株式会社 | Cylinder head casting mold and cylinder head casting method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5359762A (en) * | 1976-11-10 | 1978-05-29 | Hitachi Shipbuilding Eng Co | Method of manufacture of yet * not harden conjugate pipe |
-
1982
- 1982-08-03 JP JP13617082A patent/JPS5926229A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5926229A (en) | 1984-02-10 |
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