JP3621563B2 - Vacuum forming machine - Google Patents

Vacuum forming machine Download PDF

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Publication number
JP3621563B2
JP3621563B2 JP22322997A JP22322997A JP3621563B2 JP 3621563 B2 JP3621563 B2 JP 3621563B2 JP 22322997 A JP22322997 A JP 22322997A JP 22322997 A JP22322997 A JP 22322997A JP 3621563 B2 JP3621563 B2 JP 3621563B2
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Japan
Prior art keywords
sheet
vacuum forming
forming machine
machine frame
heating
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JP22322997A
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Japanese (ja)
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JPH1158507A (en
Inventor
昭夫 宮地
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、例えば熱可塑性樹脂シートを真空成形するための真空成形機に関する。
【0002】
【従来の技術】
従来、熱可塑性樹脂シートを加熱軟化させ、真空引きして型に密着させることで成形する真空成形機として、例えば図2に示すような真空成形機51が知られている。
この成形機51は、機枠52の真空引き台52a上に載置される成形用型53と、機枠52の上面に取付けられるシリンダユニット54と、このシリンダユニット54の作動で上下動自在なシート押え部材55と、このシート押え部材の下面に取付けられる複数の吸引ノズル56を備え、この吸引ノズル56は成形用シートSを吸着保持し得るようにされるとともに、機内には、シート加熱用ヒータ57及び冷却ノズル58が設けられ、また機内を冷却するための冷却ファン59も設けられている。
【0003】
そしてこのような真空成形機51では、吸引ノズル56で成形用シートSを吸着保持した後、機内のシート加熱用ヒータ57で加熱して軟化させ、成形用型53に向けて押付けると同時に成形用型53を通して真空引きすることで、成形用シートSを成形用型53に密着させ成形する。そして成形が完了すると、冷却ノズル58及び冷却ファン59によって冷却され、殻状の成形品が成形される。
【0004】
【発明が解決しようとする課題】
ところで、以上のような従来型の真空成形機51では、シート加熱用ヒータ57のヒータ熱は、シートSの軟化以外に活用されておらず、そのまま外気に放出されているため不経済である。
また、シートSを真空成形するためには、真空引き前に所定の軟度まで軟化させなければうまく成形できず、このため、従来はシート加熱用ヒータ57で時間をかけて加熱しているが、この加熱時間が長く、サイクル的に無駄である。
【0005】
そこで本発明は、シート加熱用ヒータの排熱を有効に活用し、シートを所定の軟度まで軟化させる時間の短縮を図ることを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するため本発明は、請求項1において、機枠内にシート加熱用ヒータを備えた真空成形機において、機枠の上部に、シート加熱用ヒータの排熱でシートを予備加熱する加温室を設けた。
【0007】
そして、例えば加温室内に次工程用のシートを収容しておき、シート加熱用ヒータでシートを加熱する際、同時に加温室内に収容したシートをヒータの排熱によって予備加熱し、ある程度軟化させておくことで、次に本加熱する際の時間の短縮を図る。
【0008】
この際、加温室を機枠の上部に配設しているため、下方から上方に向けて対流するヒータの排熱が有効に活用できる。
【0009】
しかも、例えば加温室内に収容するシートとして、ロール状素材から切断した直後のシートを収容すれば、予備加熱によってロール状に戻ろうとする性質が薄れ、例えば吸引ノズルで吸着保持する時に確実に吸着できる等、作業をスムーズに行うことができる。
【0010】
また請求項2では、加温室の下面を、機枠の上面に対して傾斜角を持って取付け、機枠の上面と加温室の下面との間の少なくとも一部に、シート冷却時の冷却効果を高める排熱部を形成するようにした。
【0011】
即ち、機枠の上面と加温室の下面との間に排熱部がなければ、加温室内のシートの予備加熱の効果は高められるものの、成形中のシートを冷却する際の冷却効果が悪くなり、冷却時間を要するようになる。
そこで、加温室内のシートの予備加熱もある程度効果的に行うことができ、しかも成形シートの冷却効果も確保されるよう、加温室の下面を機枠の上面に対して傾斜させ、上下面で挟まれる一部に、外気に連通する排熱部を形成する。
【0012】
また、加温室の下面を傾斜させれば、例えば収容したシートを取り出す時に、シートを引張れば容易に抜出すことができる。
【0013】
また請求項3では、加温室を、上下方向に複数段に仕切るようにした。
このように加温室を上下に仕切り、例えば予熱効果の薄い上段に、ロールから切出した直後のシートを収容し、予熱効果の高い下段に、成形間近のシートを収容する。そして上段で予熱したシートを順次下段に移動させ、下段で予熱したシートを抜き取って本加熱してゆけば、成形サイクルを円滑に繰返すことができる。
【0014】
【発明の実施の形態】
本発明の実施の形態について添付した図面に基づき説明する。
ここで図1は本発明に係る真空成形機の説明図である。
【0015】
本発明に係る真空成形機は、例えばポリプロピレンシートを真空成形する装置において、シート加熱用ヒータでシートを加熱軟化させる際、排熱を利用して次工程以降のシートをある程度柔らかくし、円滑に吸着保持できるようにするとともに、本加熱の時間を短縮してサイクル性の向上を図るようにしたものであり、従来の装置に簡易な改造を加えるだけで構成できる。
【0016】
即ち、図1に示すように、本真空成形機1は、従来構造とほぼ同様の成形機本体2と、この成形機本体2の上部に付設される加温室3を備え、この加温室3は、所定寸法に切断したポリプロピレンシートSを積層して収容し得るようにされるとともに、上部室3aと下部室3bの上下2段に仕切られている。
【0017】
前記成形機本体2は、真空引き台4aを備えた機枠4と、真空引き台4a上に載置される成形用型5と、機枠4の天板4bに取付けられシリンダユニット6と、このシリンダユニット6の作動で上下動自在なシート押え部材7と、このシート押え部材7の下面に取付けられる複数の吸引ノズル8を備えており、機枠4内の上部にはシート加熱用ヒータ10が配設されるとともに、成形品に向けて冷却風を吹き付ける冷却ノズル11が配設され、また機枠4の側面には機内に向けて冷却風を吹き付ける複数の冷却ファン12が設けられている。
【0018】
そして、成形用型5は機内と機外との間を移動自在とされ、例えば成形品が成形されると、機内から成形用型5ごと取り出されて成形品が型離しされた後、次の成形を行う時は、再度真空引き台4a上の所定の位置に載置されるようになっている。
また、機枠4の天板4bの上部には、金網13が配設されている。
【0019】
機枠4の上部に配設される前記加温室3は、前記金網13に対して傾斜角αを有する第1金網14と、この第1金網14と平行で且つ加温室3の空間部を上下に仕切る第2金網15を備え、この第2金網15で仕切られる上部室3aと下部室3bの一端側(図1の右方側)の側面は、ポリプロピレンシートSを出し入れするための開口部Hとされている。
【0020】
また、前記機枠4の上部の金網13と、加温室3底部の第1金網14の上下間であって、上下幅が広がった方向(図1の左方側)の側面は、機枠4内の熱気を逃がす排熱部hとして、外気と連通するように構成されている。
【0021】
そして、加温室3の上部室3aと下部室3bには、それぞれ複数のポリプロピレンシートSを積層状態で収納し得るようにされ、例えば上部室3aには、ロール状に巻かれたシート素材を切断した直後のポリプロピレンシートSを収容し、下部室3bには、成形段階に近いポリプロピレンシートSを収容する。
【0022】
以上のような真空成形機1の作用等について説明する。
吸引ノズル8によってポリプロピレンシートSが吸着保持されると、シリンダユニット6が作動してポリプロピレンシートSをシート加熱用ヒータ10に近接させ、ヒータ熱によって加熱する。
この際、ヒータ熱は吸引ノズル8によって保持されるポリプロピレンシートSを加熱するばかりでなく、上方に向けて対流する排熱によって、加温室3内に収容したポリプロピレンシートSも加熱される。
【0023】
吸引ノズル8で保持されるポリプロピレンシートSが加熱されて充分柔らかくなったところで、シリンダユニット6が作動してポリプロピレンシートSを成形用型5に向けて押付け、同時に真空引き台4aを通して真空引きがなされる。このため、シートSは成形用型5に密着する。
【0024】
真空引きによってシートSが成形用型5に密着すると、シート加熱用ヒータ10による加熱が停止され、冷却ノズル11及び冷却ファン12によって成形品の冷却が行われる。
この際、熱気は排熱部hから外部に排出され、効果的に冷却することができる。
【0025】
そして、成形品が冷却されると、成形用型5ごと真空引き台4a上から取り出され、離型部等において成形品が取り出される。
【0026】
一方、真空引き台4a上には、次のポリプロピレンシートSが載置される。このポリプロピレンシートSは、加温室3の下部室3bの最下段に収容されていたポリプロピレンシートSが抜き出されて載置されるものであり、前回までのシート加熱用ヒータ10の排熱による加熱によって、ある程度柔らかくされている。
【0027】
そして、シリンダユニット6が作動してシート押え部材7が降下し、吸引ノズル8によって真空引き台4a上のポリプロピレンシートSが吸着保持されると、シリンダユニット6が上昇作動してシートSがシート加熱用ヒータ10に近接せしめられ、ヒータ熱による加熱軟化処理が開始される。
また真空引き台4a上には、成形用型5がセットされ、同様なサイクルが繰返される。
【0028】
ここで、ポリプロピレンシートSは、予め排熱を利用して加熱されているため、ロール状に戻ろうとする性質が無くなって吸引ノズル8による吸着保持が確実になされるとともに、加熱時間が短くて済み、電気代の節約、及びサイクルタイムの短縮等が図られる。
【0029】
ところで、加温室3のポリプロピレンシートSは、例えばロール状に巻かれたシート素材を所定寸法に切断した際、切断直後のポリプロピレンシートSを上部室3aに積層して収容し、例えばロール状に戻ろうとする性質が無くなる程度に柔らかくなると、下部室3bに移動させる等によって、下部室3bのポリプロピレンシートSは、成形段階に近いシートSを収容するようにする。
この際、上部室3aから下部室3bへのシートSの移動方法等は任意であり、1枚ずつ移動させても、ある程度纏めて移動させても良い。
【0030】
そして、このような収容方法によって、下方のシート加熱用ヒータ10の効率的使用が図られるが、このようなポリプロピレンシートSの出し入れは、開口部Hを利用して行う。
この際、特に上部室3a、下部室3bからシートSを取り出す時は、第1金網14、及び第2金網15が傾斜しているため、容易に引き抜くことができる。
【0031】
尚、以上のような真空成形機1によって、従来のサイクルタイムに対し6秒/1サイクルの短縮が図られ、1日当たりのショット数を、従来の80〜120ショットに対して100〜130ショットに向上させることができた。
【0032】
尚、本発明は以上のような実施形態に限定されるものではない。本発明の特許請求の範囲に記載した事項と実質的に同一の構成を有し、同一の作用効果を奏するものは、本発明の技術的範囲に属する。
例えばポリプロピレンシートSは、他の樹脂素材、例えば塩化ビニル、ポリカーボネート、ポリスチレン等の熱可塑性樹脂でも良く、また、成形用型5は固定式であっても良い。
【0033】
【発明の効果】
以上のように本発明に係る真空成形機は、請求項1のように、機枠内にシート加熱用ヒータを備えた真空成形機において、機枠の上部に、シート加熱用ヒータの排熱でシートを予備加熱する加温室を設けたため、今まで無駄に放熱していたヒータの排熱を有効に活用して次工程以降のシートを予備加熱することができ、作業を円滑に行うことができるとともに、サイクルタイムを短縮させることができる。
また請求項2のように、機枠の上面と加温室の下面との間の少なくとも一部に、シート冷却時の冷却効果を高める排熱部を形成すれば、成形シートを冷却する際の冷却効果を高めて冷却時間を短くすることができる。
また請求項3のように、加温室を、上下方向に複数段に仕切れば、例えば上段に、ロールから切出した直後のシートを収容し、下段に、成形間近のシートを収容する等によって効率的に予熱することができる。
【図面の簡単な説明】
【図1】本発明に係る真空成形機の説明図
【図2】従来の真空成形機の説明図
【符号の説明】
1…真空成形機、3…加温室、4…機枠、5…成形用型、8…吸引ノズル、10…シート加熱用ヒータ、13…金網、14…第1金網、15…第2金網、h…排熱部、α…傾斜角。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum forming machine for vacuum forming, for example, a thermoplastic resin sheet.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, a vacuum forming machine 51 as shown in FIG. 2 is known as a vacuum forming machine for forming a thermoplastic resin sheet by heating and softening, vacuuming and adhering it to a mold.
The molding machine 51 is movable up and down by the operation of the cylinder unit 54, the molding die 53 placed on the vacuum pulling table 52 a of the machine frame 52, the cylinder unit 54 attached to the upper surface of the machine frame 52. A sheet pressing member 55 and a plurality of suction nozzles 56 attached to the lower surface of the sheet pressing member 56 are provided. The suction nozzles 56 are configured to suck and hold the forming sheet S. A heater 57 and a cooling nozzle 58 are provided, and a cooling fan 59 for cooling the inside of the machine is also provided.
[0003]
In such a vacuum forming machine 51, after the forming sheet S is sucked and held by the suction nozzle 56, it is heated and softened by the sheet heating heater 57 in the machine and pressed toward the forming die 53 at the same time as forming. By vacuuming through the mold 53, the molding sheet S is brought into close contact with the molding mold 53 and molded. When the molding is completed, it is cooled by the cooling nozzle 58 and the cooling fan 59, and a shell-shaped molded product is molded.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional vacuum forming machine 51 as described above, the heater heat of the sheet heating heater 57 is not utilized except for the softening of the sheet S and is uneconomical because it is released to the outside as it is.
Further, in order to vacuum form the sheet S, the sheet S cannot be formed well unless it is softened to a predetermined softness before evacuation. For this reason, the sheet heating heater 57 is conventionally heated over time. This heating time is long and is useless in cycles.
[0005]
Therefore, an object of the present invention is to effectively use the exhaust heat of the heater for heating the sheet, and to shorten the time for softening the sheet to a predetermined softness.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in the vacuum forming machine provided with a sheet heating heater in the machine frame, the sheet is preheated by exhaust heat of the sheet heating heater in the upper part of the machine frame. A greenhouse was installed.
[0007]
For example, when a sheet for the next process is stored in a heating chamber and the sheet is heated by a heater for heating the sheet, the sheet stored in the heating chamber is preheated by the exhaust heat of the heater and softened to some extent. By doing so, the time for the next main heating is shortened.
[0008]
At this time, since the heating chamber is disposed in the upper part of the machine frame, the exhaust heat of the heater that convects from below to above can be effectively utilized.
[0009]
Moreover, for example, if a sheet immediately after being cut from a roll-shaped material is accommodated as a sheet to be accommodated in a heating chamber, the property of returning to a roll shape by preheating is reduced, and for example, it is reliably adsorbed when adsorbed and held by a suction nozzle. The work can be performed smoothly.
[0010]
Further, in claim 2, the lower surface of the greenhouse is attached with an inclination angle with respect to the upper surface of the machine frame, and at least a part between the upper surface of the machine frame and the lower surface of the greenhouse is cooled at the time of sheet cooling. An exhaust heat part that enhances the temperature is formed.
[0011]
In other words, if there is no exhaust heat part between the upper surface of the machine frame and the lower surface of the heating chamber, the effect of preheating the sheets in the heating chamber can be enhanced, but the cooling effect when cooling the sheet being formed is poor. Therefore, cooling time is required.
Therefore, the lower surface of the heating chamber is inclined with respect to the upper surface of the machine frame so that the preheating of the sheet in the heating chamber can be effectively performed to some extent and the cooling effect of the molded sheet is ensured. A heat exhaust portion communicating with the outside air is formed in a portion sandwiched.
[0012]
In addition, if the lower surface of the heating chamber is inclined, for example, when the accommodated sheet is taken out, it can be easily extracted by pulling the sheet.
[0013]
Further, according to the third aspect of the present invention, the greenhouse is partitioned into a plurality of stages in the vertical direction.
In this way, the heating chamber is partitioned into upper and lower parts, for example, the sheet immediately after being cut from the roll is accommodated in the upper stage where the preheating effect is thin, and the sheet that is about to be molded is accommodated in the lower stage where the preheating effect is high. If the sheet preheated in the upper stage is sequentially moved to the lower stage, and the sheet preheated in the lower stage is extracted and heated, the molding cycle can be repeated smoothly.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is an explanatory view of a vacuum forming machine according to the present invention.
[0015]
The vacuum forming machine according to the present invention, for example, in an apparatus for vacuum forming a polypropylene sheet, when the sheet is heated and softened with a heater for heating the sheet, the heat from the next process is softened to some extent by using exhaust heat, and is smoothly adsorbed. In addition to being able to hold, the heating time is shortened to improve the cycle performance, and the conventional apparatus can be configured only by a simple modification.
[0016]
That is, as shown in FIG. 1, the present vacuum forming machine 1 includes a molding machine body 2 that is substantially the same as the conventional structure, and a heating chamber 3 attached to the upper part of the molding machine body 2. The polypropylene sheet S cut into a predetermined dimension can be stacked and accommodated, and is divided into two upper and lower stages of the upper chamber 3a and the lower chamber 3b.
[0017]
The molding machine body 2 includes a machine frame 4 having a vacuum drawing table 4a, a molding die 5 placed on the vacuum drawing table 4a, a cylinder unit 6 attached to a top plate 4b of the machine frame 4, A sheet pressing member 7 that can be moved up and down by the operation of the cylinder unit 6 and a plurality of suction nozzles 8 attached to the lower surface of the sheet pressing member 7 are provided. And a cooling nozzle 11 for blowing cooling air toward the molded product, and a plurality of cooling fans 12 for blowing cooling air toward the interior of the machine frame 4 are provided. .
[0018]
The molding die 5 can be moved between the inside and outside of the machine. For example, when a molded product is molded, the molding die 5 is taken out from the inside of the machine and the molded product is released from the mold. When molding is performed, it is placed again at a predetermined position on the vacuum drawing table 4a.
Further, a wire mesh 13 is disposed on the top plate 4 b of the machine frame 4.
[0019]
The heating chamber 3 disposed in the upper part of the machine frame 4 includes a first wire mesh 14 having an inclination angle α with respect to the wire mesh 13, and a space parallel to the first wire mesh 14 and moving up and down the space portion of the heat treatment chamber 3. A side wall on one end side (right side in FIG. 1) of the upper chamber 3a and the lower chamber 3b partitioned by the second wire mesh 15 is provided with an opening H for taking in and out the polypropylene sheet S. It is said that.
[0020]
Further, the side surface in the direction (the left side in FIG. 1) in which the vertical width is widened between the upper and lower wire meshes 13 of the machine frame 4 and the first wire mesh 14 at the bottom of the heating chamber 3 is the machine frame 4. The exhaust heat portion h that releases the hot air inside is configured to communicate with the outside air.
[0021]
A plurality of polypropylene sheets S can be accommodated in the upper chamber 3a and the lower chamber 3b of the heating chamber 3, respectively. For example, a sheet material wound in a roll shape is cut in the upper chamber 3a. The polypropylene sheet S just after being stored is accommodated, and the polypropylene sheet S close to the molding stage is accommodated in the lower chamber 3b.
[0022]
The operation of the vacuum forming machine 1 as described above will be described.
When the polypropylene sheet S is sucked and held by the suction nozzle 8, the cylinder unit 6 is operated to bring the polypropylene sheet S close to the sheet heating heater 10 and heat it by the heater heat.
At this time, the heater heat not only heats the polypropylene sheet S held by the suction nozzle 8, but also heats the polypropylene sheet S accommodated in the heating chamber 3 by exhaust heat convection upward.
[0023]
When the polypropylene sheet S held by the suction nozzle 8 is heated and becomes sufficiently soft, the cylinder unit 6 is operated to press the polypropylene sheet S against the molding die 5 and at the same time, a vacuum is drawn through the vacuum drawing table 4a. The For this reason, the sheet S is in close contact with the molding die 5.
[0024]
When the sheet S comes into close contact with the molding die 5 by evacuation, the heating by the sheet heating heater 10 is stopped, and the molded product is cooled by the cooling nozzle 11 and the cooling fan 12.
At this time, the hot air is discharged to the outside from the exhaust heat part h, and can be cooled effectively.
[0025]
Then, when the molded product is cooled, the molding die 5 is taken out from the vacuum drawing table 4a, and the molded product is taken out at the release part or the like.
[0026]
On the other hand, the next polypropylene sheet S is placed on the vacuum drawing table 4a. In this polypropylene sheet S, the polypropylene sheet S accommodated in the lowermost stage of the lower chamber 3b of the heating chamber 3 is extracted and placed, and is heated by the exhaust heat of the sheet heating heater 10 until the previous time. Is softened to some extent.
[0027]
Then, when the cylinder unit 6 is operated and the sheet pressing member 7 is lowered and the polypropylene sheet S on the vacuum drawing table 4a is sucked and held by the suction nozzle 8, the cylinder unit 6 is raised and the sheet S is heated. The heater is brought close to the heater 10 and the heat softening process by the heater heat is started.
A molding die 5 is set on the vacuum drawing table 4a, and the same cycle is repeated.
[0028]
Here, since the polypropylene sheet S is heated in advance using exhaust heat, the property of trying to return to the roll shape is lost, the suction holding by the suction nozzle 8 is ensured, and the heating time is short. In addition, the electricity bill can be saved and the cycle time can be shortened.
[0029]
By the way, when the sheet material wound in a roll shape is cut into a predetermined size, for example, the polypropylene sheet S of the greenhouse 3 is stacked and accommodated in the upper chamber 3a after being cut, and returned to a roll shape, for example. When softened to such an extent that the property to be lost is lost, the polypropylene sheet S in the lower chamber 3b accommodates the sheet S close to the molding stage, for example, by moving to the lower chamber 3b.
At this time, a method of moving the sheet S from the upper chamber 3a to the lower chamber 3b is arbitrary, and the sheet S may be moved one by one or may be moved to some extent.
[0030]
Such a housing method allows efficient use of the lower sheet heating heater 10, but such a polypropylene sheet S is taken in and out using the opening H.
At this time, particularly when the sheet S is taken out from the upper chamber 3a and the lower chamber 3b, the first wire mesh 14 and the second wire mesh 15 are inclined, so that they can be easily pulled out.
[0031]
In addition, the vacuum forming machine 1 as described above shortens 6 seconds / 1 cycle with respect to the conventional cycle time, and the number of shots per day is increased to 100 to 130 shots compared to the conventional 80 to 120 shots. I was able to improve.
[0032]
The present invention is not limited to the above embodiment. Those having substantially the same configuration as the matters described in the claims of the present invention and having the same operational effects belong to the technical scope of the present invention.
For example, the polypropylene sheet S may be another resin material, for example, a thermoplastic resin such as vinyl chloride, polycarbonate, polystyrene, and the molding die 5 may be a fixed type.
[0033]
【The invention's effect】
As described above, the vacuum forming machine according to the present invention is the vacuum forming machine having the sheet heating heater in the machine frame as in claim 1, and the exhaust heat of the sheet heating heater is disposed on the upper part of the machine frame. Since the heating chamber that preheats the sheet is provided, it is possible to preheat the sheet after the next process by effectively utilizing the exhaust heat of the heater that has been dissipating heat until now, and the work can be performed smoothly. At the same time, the cycle time can be shortened.
Further, as in claim 2, if a heat exhaust part that enhances the cooling effect during sheet cooling is formed at least partly between the upper surface of the machine frame and the lower surface of the heating chamber, cooling when cooling the molded sheet The effect can be enhanced and the cooling time can be shortened.
Further, as in claim 3, if the heated room is partitioned into a plurality of stages in the vertical direction, for example, the sheet immediately after being cut from the roll is accommodated in the upper stage, and the sheet near to molding is accommodated in the lower stage. Can be preheated.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a vacuum forming machine according to the present invention. FIG. 2 is an explanatory view of a conventional vacuum forming machine.
DESCRIPTION OF SYMBOLS 1 ... Vacuum forming machine, 3 ... Heating chamber, 4 ... Machine frame, 5 ... Mold for shaping | molding, 8 ... Suction nozzle, 10 ... Heater for sheet heating, 13 ... Wire mesh, 14 ... 1st wire mesh, 15 ... 2nd wire mesh, h: Waste heat part, α: Inclination angle.

Claims (3)

機枠内にシート加熱用ヒータを備えた真空成形機であって、前記機枠の上部に、前記シート加熱用ヒータの排熱でシートを予備加熱する加温室が設けられることを特徴とする真空成形機。A vacuum forming machine provided with a sheet heating heater in a machine frame, wherein a vacuum chamber is provided above the machine frame to preheat the sheet with the exhaust heat of the sheet heating heater. Molding machine. 請求項1に記載の真空成形機において、前記加温室の下面は、機枠の上面に対して傾斜角を持って取付けられ、前記機枠の上面と加温室の下面との間の少なくとも一部に、シート冷却時の冷却効果を高める排熱部が形成されることを特徴とする真空成形機。2. The vacuum forming machine according to claim 1, wherein the lower surface of the greenhouse is attached with an inclination angle with respect to the upper surface of the machine frame, and at least a part between the upper surface of the machine frame and the lower surface of the greenhouse In addition, the vacuum heat forming machine is characterized in that a heat exhaust portion is formed to enhance the cooling effect during sheet cooling. 請求項1又は請求項2に記載の真空成形機において、前記加温室は、上下方向に複数段に仕切られることを特徴とする真空成形機。The vacuum forming machine according to claim 1 or 2, wherein the heating chamber is partitioned into a plurality of stages in the vertical direction.
JP22322997A 1997-08-20 1997-08-20 Vacuum forming machine Expired - Fee Related JP3621563B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22322997A JP3621563B2 (en) 1997-08-20 1997-08-20 Vacuum forming machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22322997A JP3621563B2 (en) 1997-08-20 1997-08-20 Vacuum forming machine

Publications (2)

Publication Number Publication Date
JPH1158507A JPH1158507A (en) 1999-03-02
JP3621563B2 true JP3621563B2 (en) 2005-02-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP22322997A Expired - Fee Related JP3621563B2 (en) 1997-08-20 1997-08-20 Vacuum forming machine

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