JP2003071915A - Method for molding heat insulating cover, and mold - Google Patents
Method for molding heat insulating cover, and moldInfo
- Publication number
- JP2003071915A JP2003071915A JP2001264791A JP2001264791A JP2003071915A JP 2003071915 A JP2003071915 A JP 2003071915A JP 2001264791 A JP2001264791 A JP 2001264791A JP 2001264791 A JP2001264791 A JP 2001264791A JP 2003071915 A JP2003071915 A JP 2003071915A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- insulating material
- water
- insulating cover
- molding die
- 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.)
- Pending
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000011810 insulating material Substances 0.000 claims abstract description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 abstract description 20
- 238000001816 cooling Methods 0.000 description 19
- 230000000694 effects Effects 0.000 description 11
- 238000003466 welding Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 239000002783 friction material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は断熱カバーの成形方
法および成形型に係り、特に、水道管等の配管に取り付
けて配管の保温や保冷をするための断熱カバーの成形方
法および成形型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a mold for forming a heat insulating cover, and more particularly to a method and a mold for forming a heat insulating cover which is attached to a pipe such as a water pipe to keep the pipe warm or cold.
【０００２】[0002]
【従来の技術】従来、水道管の断熱カバーを製造する際
には、例えば図５に示すような製造工程によって製造さ
れる。図５に示すように、所定幅寸法を有する帯状の断
熱素材51をロール状に保持した状態から巻き戻しながら
所望の加工を連続的に順次行っていく。まず、断熱素材
51をロール状に保持した状態から巻き戻しながら、断熱
素材51の内面となる片面の幅方向全部を、第１加熱ヒー
タ54により150℃程度まで加熱して軟化させる。その
後、板材に略Ｕ字状の貫通孔が形成されたＵ字形ガイド
部58に、断熱素材51をその長手方向に沿って通過させ
る。この断熱素材51はＵ字形ガイド部58を通過すること
により、非加熱面が外面となるように断熱素材51の幅方
向に沿って湾曲した断面略Ｕ字形状（半円形状）に加工
される。次に、この断熱素材51の内面および湾曲方向両
端部近傍を、第２加熱ヒータ59により150℃程度まで加
熱して軟化させた後、略円筒形状の成形型60に、断熱素
材51を長手方向に沿って通過させる。この通過により、
断熱素材51は断面円形状に加工される。2. Description of the Related Art Conventionally, when manufacturing a heat insulating cover for a water pipe, for example, it is manufactured by a manufacturing process as shown in FIG. As shown in FIG. 5, desired processing is continuously performed while rewinding from a state in which a belt-shaped heat insulating material 51 having a predetermined width dimension is held in a roll shape. First, the insulation material
While unwinding from the state in which 51 is held in a roll shape, the entire width direction of one surface which is the inner surface of the heat insulating material 51 is heated to about 150 ° C. by the first heater 54 to be softened. Then, the heat insulating material 51 is passed along the longitudinal direction of the U-shaped guide portion 58 in which a substantially U-shaped through hole is formed in the plate material. By passing through the U-shaped guide portion 58, the heat insulating material 51 is processed into a substantially U-shaped cross section (semicircular shape) that is curved along the width direction of the heat insulating material 51 so that the non-heated surface is the outer surface. . Next, the inner surface of the heat insulating material 51 and the vicinity of both ends in the bending direction are heated to about 150 ° C. by the second heater 59 to be softened, and then the heat insulating material 51 is placed in a substantially cylindrical forming die 60 in the longitudinal direction. Pass along. By this passage,
The heat insulating material 51 is processed into a circular cross section.
【０００３】このように、断熱素材51を断面円形状に加
工する際、図６に示すように、加熱によって、あらかじ
め軟化した断熱素材51の湾曲方向両端部の端面51Ａ，51
Ｂ同士が面圧接される。この面圧接によって端面51Ａ，
51Ｂ同士は互いに溶着し、これにより成形型60を通過後
にその溶着部を切開しても、端面51Ａ，51Ｂ同士が大き
く離反し断熱素材51が初期形状に復元することがないほ
どに成形される。再び図５に戻って説明すると、成形型
60を通過した円筒状の断熱素材51は、引取機63により下
流側（図５中、左方向）に搬送され、円筒状の断熱素材
51は、充分に冷却されてから端面51Ａ，51Ｂの溶着個所
を回転カッタ65により切開され、これにより母線に沿っ
て開口部を有する断熱カバーとして形成される。In this way, when the heat insulating material 51 is processed into a circular cross section, as shown in FIG. 6, the end surfaces 51A, 51 of the both ends in the bending direction of the heat insulating material 51 which have been softened in advance by heating.
B is pressed against each other. By this surface pressure welding, the end surface 51A,
51B are welded to each other, so that even if the welded portion is cut out after passing through the molding die 60, the end surfaces 51A and 51B are largely separated from each other and the heat insulating material 51 is formed so as not to restore its initial shape. . Referring back to FIG. 5 again, the molding die
The cylindrical heat insulating material 51 that has passed through 60 is conveyed to the downstream side (left direction in FIG. 5) by the take-off machine 63, and the cylindrical heat insulating material 51.
After being sufficiently cooled, the welding portion of 51 is cut at the welding portion of the end surfaces 51A and 51B by a rotary cutter 65, whereby a heat insulating cover having an opening along the generatrix is formed.
【０００４】ここで、成形型60は、該成形型60の内側面
と円筒状の断熱素材51との摩擦抵抗を減少させるため
に、成形型60の内側面に摩擦抵抗の小さい低摩擦材（例
えばフッ素樹脂加工を施したテープ）が貼り付けられた
り、内側面に低摩擦材がコーティング処理（直接にフッ
素樹脂加工処理）されたりしている。Here, in order to reduce the frictional resistance between the inner surface of the molding die 60 and the cylindrical heat insulating material 51, the molding die 60 has a low-friction material having a small frictional resistance on the inner surface of the molding die 60 ( For example, a tape treated with a fluororesin) is attached, or a low-friction material is coated on the inner surface (direct fluororesin treatment).
【０００５】また、成形型60に冷却水用配管を設け水冷
することで、成形型60は断熱素材51の温度を下げてはい
るが、断熱素材51の冷却固化は、断熱素材51が成形型60
を通過した直後に、断熱素材51に冷却部62より冷却水を
その外周面に供給することにより行われている。Further, although the molding die 60 lowers the temperature of the heat insulating material 51 by providing a cooling water pipe in the molding die 60, the heat insulating material 51 is cooled and solidified by the heat insulating material 51. 60
Immediately after passing through the heat insulating material 51, cooling water is supplied to the outer peripheral surface of the heat insulating material 51 from the cooling portion 62.
【０００６】[0006]
【発明が解決しようとする課題】しかし、成形型60の内
側面に貼り付けたフッ素樹脂加工を施したテープ等の低
摩擦材や、内側面に直接フッ素樹脂加工処理した低摩擦
材は、断熱素材51と接触しており、断熱素材51の接触し
ながらの移動により磨耗してしまう。このため、成形型
60の内側面の内径寸法が徐々に大きくなり、加えて内側
面の低摩擦材が磨耗することで摩擦抵抗も大きくなる。However, a low-friction material such as a fluororesin-processed tape attached to the inner surface of the molding die 60 or a low-friction material directly treated with the fluororesin on the inner surface is heat-insulated. It is in contact with the material 51 and is abraded by the movement of the heat insulating material 51 while contacting. Therefore, the mold
The inner diameter of the inner surface of 60 gradually increases, and in addition, the low-friction material on the inner surface is worn, so that the friction resistance also increases.
【０００７】また、従来においては、水冷により冷却さ
れた成形型60で断熱素材51の温度を下げているが、断熱
素材51の成形型60内の滞留時間は短く、その冷却効率は
必ずしも良いとはいえない。断熱素材51が成形型60を通
過後、冷却水をその外周面に供給し冷却を行わなければ
ならない理由がここにある。Further, conventionally, the temperature of the heat insulating material 51 is lowered by the mold 60 cooled by water cooling, but the residence time of the heat insulating material 51 in the mold 60 is short and the cooling efficiency is not always good. I can't say. This is the reason why after the heat insulating material 51 has passed through the mold 60, cooling water must be supplied to the outer peripheral surface of the mold to cool it.
【０００８】本発明は、前述した問題点に鑑みてなされ
たものであり、その目的は、成形型の内径寸法を一定に
維持できるとともに、断熱素材の移動時の摩擦抵抗を小
さくでき、さらに成形スピードを向上できる断熱カバー
の成形方法および成形型を提供することにある。The present invention has been made in view of the above-mentioned problems, and an object thereof is to maintain a constant inner diameter of a molding die and reduce frictional resistance during movement of a heat insulating material, and further It is an object of the present invention to provide a heat insulating cover molding method and a molding die that can improve speed.
【０００９】[0009]
【課題を解決するための手段】前述した目的を達成する
ために、本発明の断熱カバーの成形方法は、請求項１に
記載したように、円筒状の断熱カバーを成形するため
に、所定幅寸法を有する帯状の熱可塑性樹脂製の断熱素
材における内面となる片面の幅方向全部を加熱した後、
前記断熱素材を中空の成形型に通過させるとき、前記断
熱素材と前記成形型の内側面との間に水を介在させるこ
とを特徴とする。In order to achieve the above-mentioned object, a method of molding a heat insulating cover according to the present invention has a predetermined width for molding a cylindrical heat insulating cover as described in claim 1. After heating the entire width direction of one side that is the inner surface of the heat insulating material made of a thermoplastic resin band having dimensions,
When the heat insulating material is passed through the hollow mold, water is interposed between the heat insulating material and the inner surface of the mold.
【００１０】請求項１の断熱カバーの成形方法によれ
ば、断熱素材と成形型の内側面との間に水を介在させる
ことにより、成形時における断熱素材と成形型の内側面
との摩擦抵抗を小さくできる。また、断熱素材は成形型
の内側面に接触しないので、磨耗によって内側面の内径
寸法が大きくなることを防止できる。加えて、断熱素材
に水を接触させることで、該水によって冷却できるの
で、冷却効果を高めることができる。このため、成形ス
ピードを向上でき、条件次第では、成形型の下流側の冷
却工程を不要にできることもある。According to the method of molding the heat insulating cover of claim 1, by interposing water between the heat insulating material and the inner surface of the molding die, the friction resistance between the heat insulating material and the inner surface of the molding die at the time of molding. Can be made smaller. Further, since the heat insulating material does not come into contact with the inner surface of the forming die, it is possible to prevent the inner diameter of the inner surface from increasing due to abrasion. In addition, by bringing water into contact with the heat insulating material, the water can be cooled by the water, so that the cooling effect can be enhanced. Therefore, the molding speed can be improved, and depending on the conditions, the cooling process on the downstream side of the molding die may be unnecessary.
【００１１】また、本発明の断熱カバーの成形方法にお
いては、断熱素材と成形型の内側面との間に水を介在さ
せることにより冷却するため、冷却効果を安価に向上で
き、これにより成形型の下流側の冷却工程を省略できる
可能性も生ずる。Further, in the method of molding the heat insulating cover of the present invention, the cooling effect can be improved at a low cost because cooling is performed by interposing water between the heat insulating material and the inner surface of the molding die. There is also a possibility that the cooling process on the downstream side of can be omitted.
【００１２】本発明の成形型は、請求項２に記載したよ
うに、所定箇所が加熱された帯状の熱可塑性樹脂製の断
熱素材が、中空の本体内部を通過することにより、前記
断熱素材を前記本体内部の内側面に沿って変形させて円
筒状の断熱カバーを成形する成形型であって、前記本体
内部の内側面に水を導入可能な水導入部が設けられたこ
とを特徴としている。In the molding die of the present invention, as described in claim 2, the heat insulating material made of a belt-shaped thermoplastic resin, which is heated at a predetermined position, passes through the inside of the hollow main body to thereby remove the heat insulating material. A forming die for forming a cylindrical heat insulating cover by deforming along the inner side surface of the main body, wherein a water introducing section capable of introducing water is provided on the inner side surface of the main body. .
【００１３】請求項２の成形型によれば、本体内部の内
側面に沿って所定の水が導入可能な水導入部を有するこ
とで、断熱素材と本体の内側面との間に水を介在させて
摩擦抵抗を小さくできる。また、断熱素材に水を接触さ
せることで冷却効果を向上できる。このため、成形スピ
ードを向上でき、成形型の下流側の冷却工程を省略でき
る可能性も生ずる。According to the molding die of the second aspect, the water is interposed between the heat insulating material and the inner surface of the main body by having the water introducing portion along which the predetermined water can be introduced along the inner surface of the main body. The frictional resistance can be reduced. Further, the cooling effect can be improved by bringing water into contact with the heat insulating material. Therefore, the molding speed can be improved, and there is a possibility that the cooling process on the downstream side of the molding die can be omitted.
【００１４】また、本発明の成形型は、請求項３に記載
したように、前記水導入部が前記本体内部の内側面にお
いて対向するように複数設けられていることを特徴とし
ている。このような成形型においては、複数の水導入部
を有し、この水導入部が本体内部の内側面における対向
側に配置されていることにより、本体内部の内側面と断
熱素材との間に水を供給し易くなり、また均一に供給で
きるので、内側面全域に渡って均一に摩擦抵抗を低減で
きる。また、断熱素材の表面全域に水を均一に接触させ
ることで、断熱素材の全域に渡って冷却できるので冷却
効果が向上し、成形スピードを高めることに繋がり、成
形型の下流側の冷却工程を不要にできる可能性が生ず
る。Further, as described in claim 3, the molding die of the present invention is characterized in that a plurality of the water introducing portions are provided so as to face each other on the inner side surface inside the main body. Such a mold has a plurality of water introducing parts, and the water introducing parts are arranged on the opposite sides of the inner side surface inside the main body, so that the water is introduced between the inner side surface inside the main body and the heat insulating material. Since water can be easily supplied and can be uniformly supplied, the frictional resistance can be uniformly reduced over the entire inner surface. In addition, by uniformly contacting water over the entire surface of the heat insulating material, it is possible to cool the entire heat insulating material, improving the cooling effect and increasing the molding speed. There is a possibility that it can be eliminated.
【００１５】[0015]
【発明の実施の形態】以下、本発明に係る実施形態を図
面に基づいて詳細に説明する。なお、以下に説明する実
施形態においては、図中に示す同一部材もしくは同一構
成要素については、同一符号を付すことにより重複説明
を適宜省略する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. In the embodiments described below, the same members or the same components shown in the drawings will be denoted by the same reference numerals and overlapping description will be appropriately omitted.
【００１６】図１に示すように、本発明に係る実施形態
である断熱カバー10は、熱可塑性を有するポリエチレン
発泡樹脂製の断熱素材により、円筒状に形成されてい
る。また、断熱カバー10は、その母線11に沿って開口部
13が形成されている。このように構成された断熱カバー
10は、開口部13を開いて水道管等の配管（図示せず）に
嵌め込むように装着することにより、水道管の外周を覆
い、水道管等の配管の保温や保冷をすることができる。
本実施形態においては、断熱カバー10を製造するにあた
って、開口部13の面12Ａ，12Ｂは、所定幅寸法を有する
帯状の断熱素材を幅方向に沿って湾曲させ、断熱素材の
湾曲方向両端部の端面を互いに溶着させた後に切開する
ことで形成されている。As shown in FIG. 1, a heat insulating cover 10 according to an embodiment of the present invention is formed in a cylindrical shape from a heat insulating material made of thermoplastic polyethylene foam resin. In addition, the heat insulating cover 10 has an opening along the bus bar 11.
13 are formed. Insulation cover configured in this way
By mounting the opening 10 by opening the opening 13 and fitting it into a pipe (not shown) such as a water pipe, it is possible to cover the outer circumference of the water pipe and keep the pipe warm. .
In the present embodiment, when manufacturing the heat insulating cover 10, the surfaces 12A and 12B of the opening 13 are formed by bending a band-shaped heat insulating material having a predetermined width dimension along the width direction, and It is formed by welding the end faces to each other and then making an incision.
【００１７】図２には、断熱カバー10を製造する成形装
置20が示されている。この成形装置20は、所定幅寸法を
有する帯状の断熱素材21をロール状に保持した状態から
巻き戻しながら所望の加工を連続的に順次行っていく。
まず、断熱素材21をロール状に保持した状態から巻き戻
しながら、断熱素材21の内面となる片面の幅方向全部
を、第１加熱ヒータ22Ｂにより150℃程度まで加熱して
軟化させる。その後、板材に略Ｕ字状の貫通孔が形成さ
れたＵ字形ガイド部28に、断熱素材21をその長手方向に
沿って通過させる。この断熱素材21はＵ字形ガイド部28
を通過することにより、非加熱面が外面となるように断
熱素材21の幅方向に沿って湾曲した断面略Ｕ字形状（半
円形状）に加工される。FIG. 2 shows a molding apparatus 20 for manufacturing the heat insulating cover 10. The forming device 20 continuously and sequentially performs desired processing while rewinding a band-shaped heat insulating material 21 having a predetermined width dimension from a roll-shaped state.
First, while the heat insulating material 21 is unwound from the state of being held in a roll, the first heating heater 22B heats and softens the entire width direction of one surface of the heat insulating material 21, which is an inner surface. After that, the heat insulating material 21 is passed along the longitudinal direction of the U-shaped guide portion 28 in which a substantially U-shaped through hole is formed in the plate material. This heat insulating material 21 has a U-shaped guide 28
By passing through, the heat insulating material 21 is processed into a substantially U-shaped cross section (semicircular shape) along the width direction so that the non-heated surface becomes the outer surface.
【００１８】次に、この断熱素材21の内面および湾曲方
向両端部近傍を、第２加熱ヒータ29により150℃程度ま
で加熱して軟化させた後、略円筒形状の成形型30に、断
熱素材21を長手方向に沿って通過させる。この通過によ
り、断熱素材21は断面円形状に加工される。この際、図
４に示すように、加熱によって、あらかじめ軟化した断
熱素材21の湾曲方向両端部の端面21Ａ，21Ｂ同士が面圧
接される。この面圧接によって端面21Ａ，21Ｂ同士は互
いに溶着し、これにより成形型30を通過後にその溶着部
を切開しても、端面21Ａ，21Ｂ同士が大きく離反し断熱
素材21が初期形状に復元することがないほどに成形され
る。Next, the inner surface of the heat insulating material 21 and the vicinity of both ends in the bending direction are heated to about 150 ° C. by the second heater 29 to soften the heat insulating material 21, and then the heat insulating material 21 is applied to the substantially cylindrical forming die 30. Are passed along the longitudinal direction. By this passage, the heat insulating material 21 is processed into a circular cross section. At this time, as shown in FIG. 4, by heating, the end surfaces 21A and 21B of the both ends in the bending direction of the heat insulating material 21 which has been softened in advance are brought into pressure contact with each other. Due to this surface pressure welding, the end faces 21A and 21B are welded to each other, so that even if the welded portion is cut off after passing through the molding die 30, the end faces 21A and 21B are largely separated from each other and the heat insulating material 21 is restored to the initial shape. It is molded so that there is no.
【００１９】成形型30は、図３に示すように先端30Ａが
テーパ面に形成されるとともに後端30Ｂが鉛直面に形成
された中空状の本体31を備え、この本体31の内部の内側
面31Ａに沿って所定の水（冷却水）が導入可能な複数の
水導入部33を有する。成形型30は、その先端30Ａがテー
パ面（テーパ構造）に構成されたことにより、断面略Ｕ
字形状の断熱素材21を成形型30内に導くときに、該断熱
素材21の移動に伴って本体31の内側面31Ａに沿うように
徐々に力を加えることができ、断熱素材21を成形型30内
に効率良く導くことができる。また、それぞれの水導入
部33においては、冷却水の導入圧が、例えば0.2〜0.3kg
／cm2に設定されている。この範囲においては、冷却に
用いられた水は、例えば逆流することなく、断熱素材21
と共に下流側に移動し成形型30外へ排出される。As shown in FIG. 3, the molding die 30 is provided with a hollow main body 31 having a front end 30A formed into a tapered surface and a rear end 30B formed into a vertical surface. It has a plurality of water introduction parts 33 which can introduce predetermined water (cooling water) along 31A. Since the tip 30A of the molding die 30 is formed into a tapered surface (taper structure), the molding die 30 has a substantially U-shaped cross section.
When the character-shaped heat insulating material 21 is introduced into the molding die 30, a force can be gradually applied along the inner side surface 31A of the main body 31 along with the movement of the heat insulating material 21, so that the heat insulating material 21 is molded. You can efficiently lead to within 30. Further, in each water introduction unit 33, the introduction pressure of the cooling water is, for example, 0.2 to 0.3 kg.
It is set to / cm 2 . In this range, the water used for cooling does not flow backward, for example, and the heat insulating material 21
At the same time, it moves downstream and is discharged to the outside of the molding die 30.
【００２０】冷却水の導入圧が0.2kg／cm2未満の場合に
は、本体31の内側面31Ａに沿って冷却水の水膜を形成す
ることが難しい。一方、冷却水の導入圧が0.3kg／cm2を
越えると、冷却水の導入圧が高すぎて、断熱素材21の両
端面21Ａ，21Ｂの溶着個所に悪影響を与えること、また
は断熱素材21が変形したまま固化すること、等の虞があ
る。このため、冷却水の導入圧を0.2〜0.3kg／cm2に設
定することが好ましい。When the introduction pressure of the cooling water is less than 0.2 kg / cm 2 , it is difficult to form a water film of the cooling water along the inner surface 31A of the main body 31. On the other hand, when the introduction pressure of the cooling water exceeds 0.3 kg / cm 2 , the introduction pressure of the cooling water is too high, which adversely affects the welding points of both end surfaces 21A and 21B of the heat insulating material 21, or the heat insulating material 21 There is a risk of solidifying while deformed. Therefore, it is preferable to set the introduction pressure of the cooling water to 0.2 to 0.3 kg / cm 2 .
【００２１】本実施形態の成形型30によれば、水導入部
33から本体31の内側面31Ａに沿って冷却水を導入して介
在させることで摩擦抵抗を小さくできる。このため、成
形スピードを向上できる。また、断熱素材21に冷却水を
接触させることで、断熱素材21を冷却水で冷却できるの
で冷却効果を向上することも期待できる。According to the molding die 30 of the present embodiment, the water introduction part
The frictional resistance can be reduced by introducing cooling water from 33 along the inner surface 31A of the main body 31 to intervene. Therefore, the molding speed can be improved. Further, by bringing the cooling water into contact with the heat insulating material 21, the heat insulating material 21 can be cooled with the cooling water, so that it can be expected to improve the cooling effect.
【００２２】また、図４にも示すように、水導入部33が
複数設けられており、各水導入部33が本体31の内側面31
Ａにおける対向する位置（図４中においては上下の対向
位置ではあるが、実際には、図３から判るように前後方
向にずれている位置）に設けられている。このため、本
体31の内側面31Ａへの冷却水の供給が偏ることなく均一
に供給できるので、内側面31Ａ全域の摩擦抵抗を均一に
低減できる。また、断熱素材21の表面21Ｃ全域に冷却水
を均一に接触させることで、断熱素材21の全域にわたっ
て冷却できるので、冷却効果を向上できる。Further, as shown in FIG. 4, a plurality of water introducing parts 33 are provided, and each water introducing part 33 has an inner surface 31 of the main body 31.
It is provided at a position facing A in FIG. 4 (upper and lower facing positions in FIG. 4, but in actuality, a position displaced in the front-back direction as can be seen from FIG. 3). Therefore, since the cooling water can be uniformly supplied to the inner surface 31A of the main body 31 without being biased, the frictional resistance can be uniformly reduced over the entire inner surface 31A. Further, by uniformly contacting the cooling water over the entire surface 21C of the heat insulating material 21, the whole area of the heat insulating material 21 can be cooled, so that the cooling effect can be improved.
【００２３】なお、本体31の内側面31Ａに形成する水膜
35の膜厚ｔは、場所によって若干のばらつきがあるもの
の、例えば50μｍ〜100μｍに設定されている。膜厚ｔ
が50μｍ未満の場合には、発泡体である断熱素材21表面
に凹凸があるため、摩擦抵抗を低減することが難しい。
一方、膜厚ｔが100μｍを越えると断熱素材21を好まし
い筒状に保つことが難しい。このため、膜厚ｔを50μｍ
〜100μｍに設定することが好ましい。また、本実施形
態において、成形速度（断熱素材の搬送速度）は、８〜
１６ｍ/min程度に設定することができる。A water film formed on the inner surface 31A of the main body 31
The film thickness t of 35 is set to, for example, 50 μm to 100 μm, although it varies slightly depending on the location. Film thickness t
Is less than 50 μm, it is difficult to reduce frictional resistance due to the unevenness of the surface of the heat insulating material 21 which is a foam.
On the other hand, when the film thickness t exceeds 100 μm, it is difficult to keep the heat insulating material 21 in a preferable tubular shape. Therefore, the film thickness t is 50 μm
It is preferably set to -100 μm. Further, in the present embodiment, the molding speed (conveyance speed of the heat insulating material) is 8 to
It can be set to about 16 m / min.
【００２４】また、十分な冷却効果を得るために、成形
型30を通過した筒状の断熱素材21の両端面21Ａ，21Ｂ近
傍に水供給部36から冷却水を供給し断熱素材21の外周面
に行き渡らせる。水供給部36からの冷却水で冷却した断
熱素材21を、その下流側で円筒状の断熱素材21の外周面
にエア吹出し部38からエアを吹付けて断熱素材21外周面
の水滴等の水分を取り除く。断熱素材21がポリエチレン
等の撥水性の樹脂の場合は効果的である。Further, in order to obtain a sufficient cooling effect, cooling water is supplied from the water supply unit 36 to both end surfaces 21A and 21B of the cylindrical heat insulating material 21 that has passed through the molding die 30 and the outer peripheral surface of the heat insulating material 21. Spread around. The heat insulating material 21 cooled by the cooling water from the water supply unit 36 is blown with air from the air blowing unit 38 to the outer peripheral surface of the cylindrical heat insulating material 21 at the downstream side thereof, and moisture such as water droplets on the outer peripheral surface of the heat insulating material 21. Get rid of. This is effective when the heat insulating material 21 is a water repellent resin such as polyethylene.
【００２５】再び図２に戻って説明すると、成形型30を
通過した円筒状の断熱素材21は、引取機40により下流側
（図２中、左方向）に搬送される。引取機40は、下側の
キャタピラ40Ａを断熱素材21の下側半外面に接触させる
とともに、上側のキャタピラ40Ｂを断熱素材21の上側半
外面に接触させたものである。この引取機40は、上下の
キャタピラ40Ａ，40Ｂを図２中、矢印の方向に回転させ
ることにより断熱素材21を下流側に搬送する。そして、
円筒状の断熱素材21は、充分に冷却されてから端面21
Ａ，21Ｂの溶着個所を回転カッタ65により切開される。
その後、図２に示す定尺カッタ41で所定長さに切断され
る。Returning to FIG. 2 again, the cylindrical heat insulating material 21 that has passed through the molding die 30 is conveyed to the downstream side (leftward in FIG. 2) by the take-up machine 40. The take-up machine 40 has the lower caterpillar 40A in contact with the lower half outer surface of the heat insulating material 21 and the upper caterpillar 40B in contact with the upper half outer surface of the heat insulating material 21. This take-up machine 40 conveys the heat insulating material 21 to the downstream side by rotating the upper and lower caterpillars 40A and 40B in the direction of the arrow in FIG. And
After the cylindrical heat insulating material 21 has been sufficiently cooled, the end surface 21
The welding points A and 21B are incised by the rotary cutter 65.
After that, it is cut into a predetermined length by a standard length cutter 41 shown in FIG.
【００２６】なお、前述した実施形態では、水導入部33
から冷却水を導入して断熱素材21を冷却する例について
説明したが、冷却水に限らないで、その他の水や気体を
使用することも可能である。また、前述した実施形態で
は、図４に示すように、水導入部33を上下に設けた例に
ついて説明したが、これに限るものではなく、例えば３
個以上の複数の水導入部33を、成形型30の本体31の円周
方向等間隔に設けても同様の効果を得ることができる。In the above-described embodiment, the water introducing section 33
Although an example in which cooling water is introduced to cool the heat insulating material 21 has been described, it is not limited to cooling water, and other water or gas can be used. In addition, in the above-described embodiment, as shown in FIG. 4, an example in which the water introducing portions 33 are provided at the top and bottom has been described, but the present invention is not limited to this, and for example, 3
The same effect can be obtained even if a plurality of water introducing portions 33 are provided at equal intervals in the circumferential direction of the main body 31 of the molding die 30.
【００２７】本発明は、前述した実施形態に限定される
ものではなく、適宜な変形、改良等が可能であり、前述
した各実施形態において例示した断熱カバー10や成形型
30等の材質，形状，寸法，形態，数，配置個所，厚さ寸
法等は本発明を達成できるものであれば任意であり、限
定されない。The present invention is not limited to the above-described embodiments, but can be appropriately modified and improved, and the heat insulating cover 10 and the molding die illustrated in each of the above-described embodiments can be modified.
The material, shape, dimensions, form, number, location, thickness, etc. of 30 and the like are arbitrary and are not limited as long as the present invention can be achieved.
【００２８】[0028]
【発明の効果】以上、説明したように、本発明によれ
ば、請求項１に記載したように、断熱素材と成形型の内
側面との間に水を介在させることにより、摩擦抵抗を小
さくできる。また、断熱素材は成形型の内側面に接触し
ないので、磨耗によって内側面の内径が大きくなること
を防止でき、長期にわたって安定した寸法の断熱カバー
を製造できる。As described above, according to the present invention, as described in claim 1, by interposing water between the heat insulating material and the inner surface of the molding die, the frictional resistance is reduced. it can. Further, since the heat insulating material does not come into contact with the inner surface of the molding die, it is possible to prevent the inner diameter of the inner surface from increasing due to abrasion, and it is possible to manufacture a heat insulating cover having a stable size for a long period of time.
【００２９】加えて、断熱素材に水を接触させること
で、断熱素材を冷却できるので冷却効果の向上に繋が
り、成形スピードの向上に期待ができる。この結果、断
熱カバーを長期にわたって安定的に成形でき、かつ断熱
カバーの生産性を向上できる。In addition, by bringing water into contact with the heat insulating material, the heat insulating material can be cooled, so that the cooling effect can be improved and the molding speed can be expected to be improved. As a result, the heat insulating cover can be stably molded over a long period of time, and the productivity of the heat insulating cover can be improved.
【００３０】また、本発明においては、請求項２に記載
したように、本体の内側面に沿って所定の水が導入可能
な水導入部を有することで、断熱素材と本体の内側面と
の間に水を介在させて摩擦抵抗を小さくできる。また、
断熱素材に水を接触させることで、冷却効果が向上し成
形スピードが上がるため、成形型の下流側における冷却
工程を不要にできる可能性も生ずる。この結果、断熱カ
バーを長期にわたって安定的に成形でき、かつ断熱カバ
ーの生産性を高めることができる。Further, in the present invention, as described in claim 2, the heat insulating material and the inner side surface of the main body are provided with the water introducing section along which the predetermined water can be introduced along the inner side surface of the main body. Friction resistance can be reduced by interposing water between them. Also,
By bringing water into contact with the heat insulating material, the cooling effect is improved and the molding speed is increased, so there is a possibility that the cooling step on the downstream side of the molding die may be unnecessary. As a result, the heat insulating cover can be stably molded over a long period of time, and the productivity of the heat insulating cover can be improved.
【００３１】また、本発明においては、請求項３に記載
したように、複数の水導入部を、本体の内部の内側面に
おける対向する側に設けた。この構成によって、本体の
内側面に均一に水を供給できるので、内側面全域に渡っ
て均一に摩擦抵抗を低減できる。また、断熱素材の表面
全域に水を均一に接触させることで、断熱素材の全域に
渡って冷却できるので冷却効果を高めることができる。Further, in the present invention, as described in claim 3, the plurality of water introducing portions are provided on the opposite sides of the inner side surface inside the main body. With this configuration, water can be uniformly supplied to the inner surface of the main body, so that the frictional resistance can be uniformly reduced over the entire inner surface. Further, by uniformly contacting water with the entire surface of the heat insulating material, the entire heat insulating material can be cooled, so that the cooling effect can be enhanced.
【図１】本発明に係る断熱カバーの成形方法で成形した
断熱カバーを示す斜視図である。FIG. 1 is a perspective view showing a heat insulating cover formed by a heat insulating cover forming method according to the present invention.
【図２】本発明に係る断熱カバーの成形方法を示す説明
図である。FIG. 2 is an explanatory view showing a method for molding a heat insulating cover according to the present invention.
【図３】本発明に係る成形型を示す断面図である。FIG. 3 is a cross-sectional view showing a molding die according to the present invention.
【図４】図３のＡ−Ａ線断面図である。4 is a cross-sectional view taken along the line AA of FIG.
【図５】従来の断熱カバーの成形方法を示す第１説明図
である。FIG. 5 is a first explanatory view showing a conventional method of forming a heat insulating cover.
【図６】従来の断熱カバーの成形方法を示す第２説明図
である。FIG. 6 is a second explanatory view showing a conventional method of forming a heat insulating cover.
10 断熱カバー 21 断熱素材 29 第２加熱ヒータ 30 成形型 31 本体 31Ａ 内側面 33 水導入部 36 水供給部 38 エア吹出し部 10 insulation cover 21 Insulation material 29 Second heater 30 Mold 31 body 31A inner surface 33 Water inlet 36 Water supply department 38 Air outlet
Claims (3)
所定幅寸法を有する帯状の熱可塑性樹脂製の断熱素材に
おける内面となる片面の幅方向全部を加熱した後、前記
断熱素材を中空の成形型に通過させるとき、 前記断熱素材と前記成形型の内側面との間に水を介在さ
せることを特徴とする断熱カバーの成形方法。1. In order to form a cylindrical heat insulating cover,
After heating the entire width direction of one side which is the inner surface of the band-shaped thermoplastic resin heat insulating material having a predetermined width dimension, when the heat insulating material is passed through a hollow molding die, the inside of the heat insulating material and the molding die A method for forming a heat insulating cover, characterized in that water is interposed between the heat insulating cover and the side surface.
脂製の断熱素材が、中空の本体内部を通過することによ
り、前記断熱素材を前記本体内部の内側面に沿って変形
させて円筒状の断熱カバーを成形する成形型であって、 前記本体内部の内側面に水を導入可能な水導入部が設け
られたことを特徴とする成形型。2. A belt-shaped thermoplastic insulating material, which is heated at a predetermined position, passes through the inside of a hollow main body, whereby the insulating material is deformed along the inner surface inside the main body to form a cylindrical shape. A mold for molding the heat insulating cover according to claim 1, wherein a water introducing portion capable of introducing water is provided on an inner surface of the main body.
おいて対向するように複数設けられていることを特徴と
する請求項２に記載した成形型。3. The molding die according to claim 2, wherein a plurality of the water introducing portions are provided so as to face each other on an inner side surface inside the main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001264791A JP2003071915A (en) | 2001-08-31 | 2001-08-31 | Method for molding heat insulating cover, and mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001264791A JP2003071915A (en) | 2001-08-31 | 2001-08-31 | Method for molding heat insulating cover, and mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003071915A true JP2003071915A (en) | 2003-03-12 |
Family
ID=19091340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001264791A Pending JP2003071915A (en) | 2001-08-31 | 2001-08-31 | Method for molding heat insulating cover, and mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003071915A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2455501A (en) * | 2007-12-07 | 2009-06-17 | Lamina Dielectrics Ltd | Apparatus for manufacturing a tubular product |
| JP7484329B2 (en) | 2020-03-30 | 2024-05-16 | 三菱ケミカルインフラテック株式会社 | Manufacturing method of coated pipe |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49118775A (en) * | 1973-03-16 | 1974-11-13 | ||
| JPH04210192A (en) * | 1990-12-05 | 1992-07-31 | Furukawa Electric Co Ltd:The | Manufacturing device for insulated pipe and manufacture of insulated pipe using it |
-
2001
- 2001-08-31 JP JP2001264791A patent/JP2003071915A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49118775A (en) * | 1973-03-16 | 1974-11-13 | ||
| JPH04210192A (en) * | 1990-12-05 | 1992-07-31 | Furukawa Electric Co Ltd:The | Manufacturing device for insulated pipe and manufacture of insulated pipe using it |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2455501A (en) * | 2007-12-07 | 2009-06-17 | Lamina Dielectrics Ltd | Apparatus for manufacturing a tubular product |
| GB2455501B (en) * | 2007-12-07 | 2010-08-04 | Lamina Dielectrics Ltd | Apparatus for manufacturing a tubular product |
| US8342218B2 (en) | 2007-12-07 | 2013-01-01 | Lamina Dielectrics Limited | Apparatus for manufacturing a tubular product |
| JP7484329B2 (en) | 2020-03-30 | 2024-05-16 | 三菱ケミカルインフラテック株式会社 | Manufacturing method of coated pipe |
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