JPH0374902B2 - - Google Patents
Info
- Publication number
- JPH0374902B2 JPH0374902B2 JP60068269A JP6826985A JPH0374902B2 JP H0374902 B2 JPH0374902 B2 JP H0374902B2 JP 60068269 A JP60068269 A JP 60068269A JP 6826985 A JP6826985 A JP 6826985A JP H0374902 B2 JPH0374902 B2 JP H0374902B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- manufacturing
- shaped pipe
- melting point
- shaped
- 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
- 229910045601 alloy Inorganic materials 0.000 claims description 26
- 239000000956 alloy Substances 0.000 claims description 26
- 238000002844 melting Methods 0.000 claims description 24
- 230000008018 melting Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 238000004073 vulcanization Methods 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 230000032683 aging Effects 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000005987 sulfurization reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000925 Cd alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- CSBHIHQQSASAFO-UHFFFAOYSA-N [Cd].[Sn] Chemical compound [Cd].[Sn] CSBHIHQQSASAFO-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding 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
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
-
- 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)
- Moulds For Moulding Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ゴム、プラスチツクを材料とする形
付きパイプの製造方法、詳しくはゴム、プラスチ
ツクパイプの加硫前に所望の形に曲げて形付け
し、その状態を維持して加硫し、該パイプの形を
固定する形付きパイプの製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a shaped pipe made of rubber or plastic, and more specifically, a method for manufacturing a shaped pipe made of rubber or plastic, and more specifically, a method for bending a rubber or plastic pipe into a desired shape before vulcanization. The present invention relates to a method for manufacturing a shaped pipe, in which the shape of the pipe is fixed by vulcanizing the pipe while maintaining the shape.
近年、集中給湯機が急速に普及し、その性能の
向上と小型化が追究されている。また、自動車に
ついても小型化、高性能化が求められている。こ
うした傾向は集中給湯機や自動車に限らず全ての
機器、装置についても云えることで、これによつ
て機器内空間の有効利用が極限まで追究されるこ
ととなり、その結果機器内の配管について見る
と、ケーシング（ハウジング）内に各パーツを配
置取付けできる空間（隙）に沿わせてパイプを形
付けして配管することとなり、しかも同一機種の
大量に生産するので、前記パイプの形付けは予め
パイプの生産段階で行われるようになつている。
In recent years, central water heaters have rapidly become popular, and efforts are being made to improve their performance and make them more compact. Furthermore, automobiles are also required to be smaller and have higher performance. This trend is true not only for central water heaters and automobiles, but also for all equipment and equipment, and as a result, the effective use of the space inside the equipment has been pursued to the utmost, and as a result, the piping inside the equipment has become more efficient. Then, the pipes have to be shaped and installed along the spaces (gap) in which each part can be arranged and installed in the casing (housing).Moreover, since large quantities of the same model are produced, the pipes are shaped in advance. This is now being done at the pipe production stage.
このパイプがゴム、プラスチツクを材料とする
場合の未加硫状態のパイプを所定の寸法に切断
し、次いで、このパイプに所望の形状をした心金
を嵌入して形付けし、この状態で加硫を行い加硫
後前記心金を、心金とパイプ内面との間に圧縮空
気を送り込みながら抜き取り形付きパイプを製造
している。 When this pipe is made of rubber or plastic, the unvulcanized pipe is cut to a predetermined size, and then a mandrel of the desired shape is fitted into the pipe to shape it, and in this state it is cured. After vulcanization, the mandrel is extracted and a shaped pipe is produced by blowing compressed air between the mandrel and the inner surface of the pipe.
上記従来の製造方法では、未加硫状態のパイプ
を切断して一いち心金を嵌入しなければならず、
また、加硫後、該心金を、心金とパイプ内面との
間に圧縮空気を送り込みながら抜き取る作業が必
要であり、形付けの形状が複雑な場合、心金の嵌
入と抜き取りは極めて困難で複雑な形付きパイプ
の製造は実質上できなかつた。
In the conventional manufacturing method described above, it is necessary to cut the unvulcanized pipe and insert the mandrel one by one.
In addition, after vulcanization, it is necessary to remove the mandrel while sending compressed air between the mandrel and the inner surface of the pipe, and if the shaped shape is complex, it is extremely difficult to insert and remove the mandrel. This made it virtually impossible to manufacture pipes with complicated shapes.
本発明は、以上の点に鑑み、心金の嵌入と抜き
取りを不要とし複雑な形付けを可能にした形付き
パイプの製造方法を提供することを目的とするも
のである。
In view of the above points, it is an object of the present invention to provide a method for manufacturing a shaped pipe that eliminates the need for inserting and removing a mandrel and enables complex shaping.
上記目的を達成するため、本発明にあつては、
低融点合金の棒条又は管条を芯にして、その上に
ゴム、プラスチツクパイプを押出成形し、該ゴム
プラスチツクパイプを加硫する前に所望の形に曲
げて形付けし、然る後に加硫して形付けを固定
し、次いで該パイプの芯である低融点合金を加熱
炉低融点合金溶融浴またはオイルバス等を用いて
溶解除去するものである。
In order to achieve the above object, the present invention includes:
A rod or tube made of a low melting point alloy is used as a core, and a rubber or plastic pipe is extruded onto the core, and the rubber or plastic pipe is bent into a desired shape before being vulcanized, and then vulcanized. The shape is fixed by sulfurization, and then the low melting point alloy that is the core of the pipe is melted and removed using a heating furnace, low melting point alloy melting bath, oil bath, or the like.
この様に構成される製造方法は、芯により形が
保持されて加硫され、加硫後はパイプ自体が保形
性を有し、その後、芯を除去すれば、所望の形状
のパイプを得ることができる。
In the manufacturing method configured in this way, the shape is held by the core and vulcanized, and the pipe itself has shape-retaining properties after vulcanization, and then, by removing the core, a pipe with the desired shape can be obtained. be able to.
以下、この発明の実施例を添付図面に基づいて
説明する。
Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図において、１は鉛−錫を主体とする低融
点金属の芯で、この芯１は、外径が小さいときは
棒条でもよいが大きい場合は管条とする。この芯
１の上に押出成形機２にてパイプ４を押出成形す
る。なお、３は冷却水槽である。パイプ４はゴ
ム、プラスチツクであり、使用状態におけるパイ
プ４内を通る流体の種類、流体の温度などそれぞ
れの条件に耐え得るような材料を選択する。 In FIG. 1, reference numeral 1 denotes a core made of a low melting point metal mainly composed of lead and tin.When the outer diameter is small, the core 1 may be a rod or strip, but when the outer diameter is large, it is a tube. A pipe 4 is extruded onto this core 1 using an extrusion molding machine 2. Note that 3 is a cooling water tank. The pipe 4 is made of rubber or plastic, and the material is selected so that it can withstand the various conditions such as the type of fluid passing through the pipe 4 and the temperature of the fluid during use.
芯１の上に押出成形されたパイプ４上には更に
低融点合金で外被を施して絞り加工後、図示しな
い巻取りドラムに一担巻取られ、次いで必要な長
さに切断されて第２図、第３図に示す如く加硫前
に所望の形状に形付けされる。形付けされたパイ
プ５は公知の方法により加硫されて形付けが固定
される。この加硫時、前記外被によりパイプ４が
被われているため、パイプ４の膨張変形が防止さ
れる。外被を施こさない場合には、通常より高い
圧力下で例えば蒸気加硫などを行なう。 The pipe 4 extruded onto the core 1 is further coated with a low melting point alloy, and after drawing, the pipe is wound in one roll on a winding drum (not shown), and then cut to a required length. As shown in FIGS. 2 and 3, it is shaped into a desired shape before vulcanization. The shaped pipe 5 is vulcanized by a known method to fix the shape. During this vulcanization, since the pipe 4 is covered with the outer cover, expansion and deformation of the pipe 4 is prevented. If no outer covering is applied, vulcanization, such as steam vulcanization, is carried out under higher pressure than usual.
加硫されたパイプ５は、第６図に示すように、
炉内に吊軌条６を設け、底部に傾斜皿１５を設け
た加熱炉１４中に挿入する。吊軌条６には、第５
図に示す如くギヤー９、ローラ１０、ボス１１お
よび圧板１２からなるパイプハンガーＨが係合し
ており、吊軌条６の炉内最奥部にはラツク８が設
置され前記ギヤー９が噛合するようになつてお
り、更にひねり部７が設けられている。又吊軌条
６内にはハンガーＨの索引用ワイヤ（図示せず）
が通されており、ハンガーＨの前後にその先端が
掛止されていて炉外に設けられた駆動手段（図示
せず）により、加硫されたパイプ５を取付けたハ
ンガーＨが前進、後退する。なお、軌条をループ
にすることにより一方向送りとしハンガーＨを多
数設けることもできる。 The vulcanized pipe 5 is, as shown in FIG.
It is inserted into a heating furnace 14, which has a hanging rail 6 in the furnace and an inclined plate 15 at the bottom. The suspension rail 6 has a fifth
As shown in the figure, a pipe hanger H consisting of a gear 9, a roller 10, a boss 11 and a pressure plate 12 is engaged, and a rack 8 is installed at the innermost part of the hanging rail 6 in the furnace so that the gear 9 is engaged with the pipe hanger H. and is further provided with a twist portion 7. Also, within the suspension rail 6 is a wire for indexing the hanger H (not shown).
is passed through, and the tips thereof are hooked to the front and rear of the hanger H, and the hanger H to which the vulcanized pipe 5 is attached is moved forward and backward by a driving means (not shown) provided outside the furnace. . In addition, by forming the rail into a loop, it is possible to feed in one direction and provide a large number of hangers H.
上述の加熱炉６内に挿入されたパイプ５の芯１
は加熱溶解されてパイプ５の外に流れ出るがパイ
プ５が曲つているので曲り部分に溜ることがあ
る。これをパイプ５の外に流れ出させるために吊
軌条６にひねり部７を設け更に吊軌条６内に設け
たラツク８にギヤ９を噛合させてパイプ５が水
平、垂直の両方向に回転するようにしてパイプ５
内に溶解合金が残らないようにしている。 Core 1 of pipe 5 inserted into heating furnace 6 described above
is heated and melted and flows out of the pipe 5, but since the pipe 5 is curved, it may accumulate in the bent portion. In order to make this flow out of the pipe 5, a twist part 7 is provided on the suspension rail 6, and a gear 9 is engaged with a rack 8 provided inside the suspension rail 6, so that the pipe 5 rotates both horizontally and vertically. pipe 5
This ensures that no molten alloy remains inside.
また、芯１の別の溶解除去方法として第７図に
示すオイルバス１６中に加硫後のパイプ５を投入
し芯１が溶解した頃を見はからつてパイプを自由
回転させながらオイルバスから取り出すことによ
りパイプ内溶融合金がオイルバス中に吐き出され
る。吐き出された溶融金合は比重が大きいから浴
の底に設けた溶融合金溜１７に集められ、適宜に
栓１８を開けて溶融合金を取り出す。 Another method for dissolving and removing the core 1 is to put the vulcanized pipe 5 into the oil bath 16 shown in FIG. By taking it out, the molten alloy inside the pipe is discharged into the oil bath. Since the discharged molten alloy has a high specific gravity, it is collected in a molten alloy reservoir 17 provided at the bottom of the bath, and the stopper 18 is opened as appropriate to take out the molten alloy.
使用する低融点合金は曲げ加工が容易でパイプ
５の加硫温度では溶けることがなくパイプの加硫
後溶解除去するのにできるだけ低い温度で溶ける
ものが好ましい。この条件に叶うものとしては、
鉛−錫共晶半田の他、鉛−錫−ビスマス、錫−カ
ドミウム合金等の融点150℃〜200℃のものが使用
される。 The low melting point alloy used is preferably one that is easy to bend, does not melt at the vulcanization temperature of the pipe 5, and melts at a temperature as low as possible for melting and removal after the pipe is vulcanized. If this condition is met,
In addition to lead-tin eutectic solder, lead-tin-bismuth, tin-cadmium alloys, etc. with melting points of 150°C to 200°C are used.
また、使用されるオイルバスは低融点合金を溶
解する作業温度で分解等変質しないものであれば
よい。この条件に合うものとしてはシリコンオイ
ルバス等が挙げられる。また、オイルバスに代え
て芯１に使用する低融点合金溶融浴を用いると更
に便利である。また、硫酸水素ナトリウムのよう
に融点の低い溶融塩浴も使用できる。 Further, the oil bath used may be one that does not undergo decomposition or other deterioration at the working temperature for melting the low melting point alloy. A silicone oil bath and the like can be cited as a device that meets this condition. Further, it is more convenient to use a molten bath of a low melting point alloy for the core 1 instead of the oil bath. Also, a molten salt bath with a low melting point, such as sodium hydrogen sulfate, can be used.
次に本発明では、芯１を溶解除去するため、ゴ
ム、プラスチツクパイプが熱老化すると考えられ
るが、芯１となる低融点金属の棒条又は管条の太
さ、厚さをできるだけ小さくし、パイプ５の外に
設ける低融点合金外被も薄くすることにより熱老
化の心配はなくなる。 Next, in the present invention, since the core 1 is melted and removed, the rubber or plastic pipe is considered to undergo heat aging, but the thickness and thickness of the low melting point metal rod or tube that will become the core 1 are made as small as possible, By making the low melting point alloy outer covering provided outside the pipe 5 thin, there is no need to worry about heat aging.
ここで、熱老化の有無を確認するために外径30
mmφ内径27mmφの鉛管の上にクロロプレンを主体
とする混和物を材料として５mmの肉厚パイプを押
出成形し、そのパイプの外に前記合金で1.5mm厚
の外被を施し絞り加工をして加硫後170℃の低融
点合金溶融浴中に投入し、芯を溶解除去したパイ
プと芯を溶解除去してないパイプとからそれぞれ
サンプルを採取し、引張−伸び特性試験を行い対
比したが両者間には差違がなく熱老化が生じてい
ないことを確認した。 Here, in order to check the presence or absence of heat aging,
A pipe with a thickness of 5 mm is extruded from a mixture mainly composed of chloroprene on a lead pipe with an inner diameter of 27 mm, and a 1.5 mm thick outer jacket is applied to the outside of the pipe using the alloy, which is then drawn and processed. After sulfurization, samples were placed in a low melting point alloy molten bath at 170°C, and samples were taken from the pipe with the core dissolved and removed, and from the pipe where the core was not dissolved, and a tensile-elongation property test was performed and compared, but there was no difference between the two. There was no difference in the results, confirming that no heat aging had occurred.
以上の説明から明らかな如く本発明の方法によ
れば、加硫前のパイプに一いち心金を通して形付
けする必要がなく、芯付きパイプを適宜切断して
形付けするだけでよく、また圧縮空気を用いて心
金を抜く作業はなくなり、溶解除去するので、作
業は、極めて簡単になる外、従来のように心金を
用いるものは、心金の挿入、抜き取りが困難なた
め、複雑な形付けはできなかつたが、本発明の方
法では可成り複雑な形付けでも要するに芯を溶解
除去できる程度ならばできる。また、芯に使用す
る低融点合金は繰返し利用できるので全く無駄に
ならない。
As is clear from the above explanation, according to the method of the present invention, there is no need to pass a cored metal through the pipe before vulcanization and shape it, and it is only necessary to cut the cored pipe appropriately and shape it. There is no need to remove the mandrel using air, and the work is extremely simple since it is removed by dissolution. However, with the method of the present invention, even fairly complicated shapes can be formed as long as the core can be dissolved and removed. Furthermore, the low melting point alloy used for the core can be used repeatedly, so there is no waste at all.
第１図はパイプの押出成形の説明図、第２図及
び第３図はパイプの形付け例の説明図、第４図は
吊軌条の説明図、第５図は吊軌条にパイプハンガ
ーを装着した状態の横断面図、第６図は加熱炉の
横断面図、第７図はオイルバスの横断面図であ
る。
１……芯、２……押出成形機、４……パイプ、
６……吊軌条、Ｈ……パイプハンガー、１４……
加熱炉、１６……オイルバス。
Figure 1 is an explanatory diagram of pipe extrusion molding, Figures 2 and 3 are explanatory diagrams of pipe shaping examples, Figure 4 is an explanatory diagram of a hanging rail, and Figure 5 is a pipe hanger attached to a hanging rail. FIG. 6 is a cross-sectional view of the heating furnace, and FIG. 7 is a cross-sectional view of the oil bath. 1... core, 2... extrusion molding machine, 4... pipe,
6... Hanging rail, H... Pipe hanger, 14...
Heating furnace, 16...oil bath.
Claims (1)
に未加硫のゴム、プラスチツクパイプを押出成形
し、このゴム、プラスチツクを所望の形に曲げて
形付けし、然る後に加硫して形付けを固定し、つ
いで、該パイプの芯である前記低融点合金を溶解
除去することを特徴とする形付きパイプの製造方
法。 ２ 特許請求の範囲第１項において、上記ゴム、
プラスチツクパイプを、内層と外層に分け、両層
間に耐圧補強編組を施したものとしたことを特徴
とする形付きパイプの製造方法。 ３ 特許請求の範囲第１項又は第２項において、
加硫後の形付けパイプをオイルバスに投入し、該
パイプを水平・垂直を含む自由回転運動をさせて
上記芯を溶解除去することを特徴とする形付きパ
イプの製造方法。 ４ 特許請求の範囲第１項又は第２項において、
加硫後の形付けパイプを上記低融点合金槽に投入
し、該パイプを水平・垂直を含む自由回転運動を
させて上記芯を溶解除去することを特徴とする形
付きパイプの製造方法。 ５ 特許請求の範囲第３項又は第４項において、
加圧状態で加硫することを特徴とする形付きパイ
プの製造方法。 ６ 特許請求の範囲第１項又は第２項において、
加硫後の形付パイプを加熱炉に入れ、該パイプを
水平、垂直を含む自由な回転運動をさせて前記低
融点合金を溶解除去することを特徴とする形付き
パイプの製造方法。 ７ 特許請求の範囲第３項において、オイルバス
の下部に溶解合金溜りを設け、該溶解合金溜りの
下部から該合金を抜き取ることを特徴とする形付
きパイプの製造方法。 ８ 特許請求の範囲第４項において、溶解合金の
受け皿を傾斜して設け該溶解合金を炉外に取り出
すことを特徴とする形付きパイプの製造方法。 ９ 特許請求の範囲１〜８項の何れか１項におい
て、低融点合金が150℃〜200℃の融点を有するも
のであることを特徴とする形付きパイプの製造方
法。[Scope of Claims] 1. Extrusion molding of unvulcanized rubber or plastic pipe onto a rod-shaped or tube-shaped core made of a low-melting point alloy, and bending and shaping the rubber or plastic into a desired shape; A method for manufacturing a shaped pipe, which comprises vulcanizing the pipe to fix the shape, and then melting and removing the low melting point alloy that is the core of the pipe. 2 In claim 1, the above rubber,
A method for manufacturing a shaped pipe, characterized in that a plastic pipe is divided into an inner layer and an outer layer, and a pressure-resistant reinforcing braid is applied between both layers. 3 In claim 1 or 2,
A method for manufacturing a shaped pipe, which comprises placing the shaped pipe after vulcanization in an oil bath, and causing the pipe to rotate freely, including horizontally and vertically, to dissolve and remove the core. 4 In claim 1 or 2,
A method for manufacturing a shaped pipe, characterized in that the shaped pipe after vulcanization is placed in the low melting point alloy bath, and the pipe is freely rotated horizontally and vertically to melt and remove the core. 5 In claim 3 or 4,
A method for manufacturing a shaped pipe characterized by vulcanization under pressure. 6 In claim 1 or 2,
A method for manufacturing a shaped pipe, which comprises placing the shaped pipe after vulcanization in a heating furnace, and causing the pipe to rotate freely, including horizontally and vertically, to melt and remove the low melting point alloy. 7. The method for manufacturing a shaped pipe according to claim 3, characterized in that a molten alloy reservoir is provided at the bottom of the oil bath, and the alloy is extracted from the bottom of the molten alloy reservoir. 8. The method for manufacturing a shaped pipe according to claim 4, characterized in that a receiving tray for the molten alloy is provided at an angle and the molten alloy is taken out of the furnace. 9. A method for manufacturing a shaped pipe according to any one of claims 1 to 8, characterized in that the low melting point alloy has a melting point of 150°C to 200°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60068269A JPS61222729A (en) | 1985-03-28 | 1985-03-28 | Manufacture of shaped pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60068269A JPS61222729A (en) | 1985-03-28 | 1985-03-28 | Manufacture of shaped pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61222729A JPS61222729A (en) | 1986-10-03 |
| JPH0374902B2 true JPH0374902B2 (en) | 1991-11-28 |
Family
ID=13368863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60068269A Granted JPS61222729A (en) | 1985-03-28 | 1985-03-28 | Manufacture of shaped pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61222729A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2819322B2 (en) * | 1989-10-31 | 1998-10-30 | 新東工業株式会社 | Low melting point metal core casting equipment |
| FR2687949B1 (en) * | 1992-03-02 | 1994-04-22 | Caoutchouc Manuf Plastique | MALLEABLE CHUCK TO CONFORM FLEXIBLE TUBES AND PIPES. |
| JP4025281B2 (en) * | 2003-11-19 | 2007-12-19 | 本田技研工業株式会社 | Method for manufacturing metal member |
-
1985
- 1985-03-28 JP JP60068269A patent/JPS61222729A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61222729A (en) | 1986-10-03 |
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