JPS6330133B2 - - Google Patents
Info
- Publication number
- JPS6330133B2 JPS6330133B2 JP58112550A JP11255083A JPS6330133B2 JP S6330133 B2 JPS6330133 B2 JP S6330133B2 JP 58112550 A JP58112550 A JP 58112550A JP 11255083 A JP11255083 A JP 11255083A JP S6330133 B2 JPS6330133 B2 JP S6330133B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- heating
- molding
- temperature
- hot plate
- 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
- 238000010438 heat treatment Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 27
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 229920001169 thermoplastic Polymers 0.000 claims description 9
- 239000004416 thermosoftening plastic Substances 0.000 claims description 9
- 230000009477 glass transition Effects 0.000 claims description 5
- 238000003856 thermoforming Methods 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 description 23
- 239000000463 material Substances 0.000 description 10
- 230000002950 deficient Effects 0.000 description 6
- 229920006248 expandable polystyrene Polymers 0.000 description 6
- 229920005669 high impact polystyrene Polymers 0.000 description 5
- 239000004797 high-impact polystyrene Substances 0.000 description 5
- 230000000873 masking effect Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 239000004794 expanded polystyrene Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
Classifications
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/42—Heating or cooling
- B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
- B29C51/422—Heating or cooling of preforms, specially adapted for thermoforming to produce a temperature differential
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は熱可塑性合成樹脂シートの加熱成形方
法に関する。更に詳しくは、熱可塑性合成樹脂シ
ートを加熱成形する際に、良好な温度管理を達成
するのに好適な加熱成形法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of thermoforming a thermoplastic synthetic resin sheet. More specifically, the present invention relates to a thermoforming method suitable for achieving good temperature control when thermoplastic synthetic resin sheets are thermoformed.
熱可塑性合成樹脂シートの成形において温度管
理の良否が成形品に与える影響は極めて大きい。
一般的に、加熱方法としては、伝導加熱、輻射加
熱および対流加熱の三つがあつて目的に応じて適
宜選択される。これらの加熱の目的は、マクロ的
には一回の成形における成形面全体を均一に加熱
することにある。しかし乍らミクロ的には、部分
的に加熱の程度を不均一にすることが望ましい場
合もないではない。例えば発泡ポリスチレンシー
トの深絞り成形品（例えばコツプ）を得る目的の
ために、成形部分の周囲部分の温度は、シートの
軟化温度近傍に加熱するが、コツプの底部を中心
とした成形部分は、それよりも低く加熱しておい
て、コツプの底部の肉厚を十分に保持し、かつ成
形部分への周囲部分からのシートの引込みを容易
にしようとする方法がある。この方法は、上記の
不均一加熱を、成形部分の周囲シートを押えるフ
ランジおよびシート押え板に加熱手段を設けるこ
とにより達成しているすぐれた方法であるが、装
置的に複雑となる欠点がある。 When molding thermoplastic synthetic resin sheets, the quality of temperature control has an extremely large effect on the molded product.
Generally, there are three heating methods: conduction heating, radiation heating, and convection heating, which are appropriately selected depending on the purpose. The purpose of this heating is to uniformly heat the entire molding surface in one molding from a macroscopic perspective. However, from a microscopic perspective, it is sometimes desirable to make the degree of heating non-uniform in some areas. For example, for the purpose of obtaining a deep-drawn product (e.g., a cot tip) of a foamed polystyrene sheet, the temperature of the surrounding area of the formed part is heated to near the softening temperature of the sheet, but the temperature of the formed part centered on the bottom of the cot tip is There is a method of heating lower than that to maintain sufficient wall thickness at the bottom of the tip and to facilitate drawing of the sheet from the surrounding area into the forming part. This method is an excellent method that achieves the above-mentioned non-uniform heating by providing heating means on the flange that presses the sheet surrounding the molded part and the sheet press plate, but it has the disadvantage that the equipment is complicated. .
一方マスキング加熱という方法が知られてい
る。この方法は、ヒーターとシートとの間にマス
キング材を使用して加熱調節を行なう方法であ
る。一般的には、この方法は輻射加熱における均
一加熱の困難さから結果として生ずる過熱を調節
するために、金網などをヒーターとシートとの間
に適宜挿入するものであつて、その目的はむしろ
均一加熱にある。シートの伸びの部分調節のため
にマスキング材を使用して部分的に加熱を不均一
ならしめるように調節することもあるが、その例
は輻射加熱におけるものであつて、実施は容易で
あるが精度的に十分なものであるとは言い難い。 On the other hand, a method called masking heating is known. This method uses a masking material between the heater and the sheet to adjust the heating. In general, this method involves inserting a wire mesh or the like between the heater and the sheet as appropriate to control the overheating that occurs as a result of the difficulty of uniform heating in radiant heating. It's in the heating. In order to partially adjust the elongation of the sheet, a masking material may be used to make the heating uneven locally, but this example is for radiant heating and is easy to implement. It is difficult to say that the accuracy is sufficient.
本発明は上記のようなミクロ的不均一加熱方法
の改良に係るものであり、熱板を使用した好適な
不均一加熱方法を提供するものである。 The present invention relates to an improvement of the microscopic non-uniform heating method as described above, and provides a suitable non-uniform heating method using a hot plate.
熱板加熱方法は、本質的には伝導加熱方法であ
つて、他の方法に比較して、加熱精度、熱効率の
上からすぐれている。しかし乍ら伝導加熱方法を
使用する場合に、いわゆるマスキング材を使用す
ることは、ヒーターとシートとの間にマスキング
材を介在させることとなるので、折角の伝導加熱
方法の長所を失なうことになるために適当ではな
い。 The hot plate heating method is essentially a conduction heating method, and is superior to other methods in terms of heating accuracy and thermal efficiency. However, if a so-called masking material is used when using the conductive heating method, the masking material will be interposed between the heater and the sheet, so the advantages of the conductive heating method will be lost. It is not appropriate to become
本発明の要旨とするところは、少なくとも１層
の熱可塑性合成樹脂発泡シートからなるシートを
熱板にて両面から加熱し、その後成形する方法で
あつて、表面の熱伝導性が部分的に異なる熱板を
使用して、相対的に主として成形部分を高温に、
その周辺部分をシートにおけるガラス転移点以下
の低い温度に加熱することを特徴とする熱可塑性
合成樹脂シートの加熱成形方法にある。 The gist of the present invention is a method in which a sheet made of at least one layer of thermoplastic synthetic resin foam sheet is heated from both sides with a hot plate, and then molded, in which the thermal conductivity of the surface is partially different. Using a hot plate, heat the molded part to a relatively high temperature.
The present invention provides a method for thermoforming a thermoplastic synthetic resin sheet, characterized by heating the peripheral portion thereof to a low temperature below the glass transition point of the sheet.
本発明における熱可塑性合成樹脂積層シート
は、少なくとも１層の熱可塑性合成樹脂発泡シー
トからなるシートであり、該発泡シート（例え
ば、発泡ポリスチレンシート、発泡ポリオレフイ
ンシートなど）のみからなる単層シートや、発泡
シートを少なくとも１層含む積層シートである。
例えば発泡ポリスチレンシートの片面又は両面に
ハイインパクトポリスチレンシートをラミネート
したシート、発泡ポリスチレンシートの両面にポ
リエチレンシートおよびハイインパクトポリスチ
レンシートをそれぞれラミネートしたシート等で
ある。熱板はシートの両面に使用する。通常シー
トは熱板と実質的に接触するようにして加熱され
る。両面熱板加熱の場合の熱板間隔は一般にはシ
ート厚（発泡シートの場合には一次発泡シート
厚）より幾分少な目が好ましい。また本発明にお
ける熱板による加熱成形は、温間成形および冷間
成形についても好適に適用されうる。成形方法は
真空成形、圧空成形のほか、これらの応用として
のフリードローイング成形、プラグ・アンド・リ
ング成形、リツジ成形、マツチド・モールド成
形、ストレート成形、ドレープ成形、リバースド
ロー成形、エアスリツプ成形、プラグアシスト成
形、プラグアシストリバースドロー成形などおよ
びこれらの組み合せの何れの方法にも適用しう
る。 The thermoplastic synthetic resin laminated sheet in the present invention is a sheet made of at least one layer of thermoplastic synthetic resin foamed sheet, and a single-layer sheet made only of the foamed sheet (for example, a foamed polystyrene sheet, a foamed polyolefin sheet, etc.), It is a laminated sheet containing at least one foam sheet.
Examples include a sheet in which a high-impact polystyrene sheet is laminated on one or both sides of a foamed polystyrene sheet, and a sheet in which a polyethylene sheet and a high-impact polystyrene sheet are laminated on both sides of a foamed polystyrene sheet, respectively. Heat plates are used on both sides of the sheet. Typically, the sheet is heated in substantial contact with a hot plate. In the case of double-sided hot plate heating, it is generally preferable that the spacing between the hot plates be somewhat smaller than the sheet thickness (in the case of a foamed sheet, the primary foamed sheet thickness). Furthermore, the heat forming using a hot plate in the present invention can also be suitably applied to warm forming and cold forming. Molding methods include vacuum forming, pressure forming, and applications of these such as free drawing forming, plug and ring forming, rigid forming, matt molding, straight forming, drape forming, reverse draw forming, air slip forming, and plug assist forming. It can be applied to any method such as molding, plug assist reverse draw molding, etc., or a combination thereof.
本発明の加熱方法は相対的に主として成形部分
を高温に、その周囲部分を低温にするものであ
る。即ち、成形部分を成形目的のための適正温度
にし、その周囲部分をシートの使用材質における
ガラス転移点以下の低い温度にするものであり目
的とする成形物の形状、厚みなどおよび金型の配
置状況などに応じ、成形目的のための適正温度部
分、その部分よりも高温部分又は低温部分を任意
に設定しうるものである。成形部分又は周囲部分
のそれぞれの部分において適当な温度勾配を与え
ることも好適な実施態様の一つである。これらの
場合における低温高温とは相対的なものであつ
て、一般的にはシートの軟化温度および加熱時間
などを基準として適宜決定される。また周囲部分
低温加熱法の一変形として、成形部分にごく近い
周囲部のみを、成形部分よりも若干高温にする方
法も本発明の一態様である。通常本発明における
最高温部は使用材質の成形法により成形可能な温
度が選択される。熱板表面の熱伝導性を部分的に
異ならしめるためには以下のような手段が主とし
て使用される。第１図は熱板１に欠損部３を設け
たものであり、之により欠損部を成形周囲部分に
対向させることにより、成形部分を高温に、その
周囲部分をそれよりも低温（ガラス転移点以下の
低い温度のこと）に加熱することができる。第２
図は、欠損部３に断熱材４を装填し、不均一加熱
の度合をより大ならしめたものである。第３図は
欠損部３の形を台形としたものであつて、第１図
よりも温度勾配はなめらかである。第３図の台形
の代りに、曲線形の欠損部３を用いてもよい。第
４図は欠損部３に、補助ヒーター５を用いた例で
あり、補助ヒーター５の代りに、冷却管を組み込
んでもよい。これらの欠損部３の大きさ又は断熱
材４の材質、断熱材４の装填部の大きさは、得よ
うとする不均一加熱の度合に応じて適宜選択され
る。不均一加熱達成手段は、これらの例示に限定
されることはなく、これらの組み合わせも可能で
ある。また熱板とシートとの間に若干の隙間を設
けることもできる。本発明により、ミクロ的不均
一加熱を実施した場合には次の様な効果が得られ
る。すなわち例えば(i)印刷合わせ成形（又は見当
合わせ成形ともいう）を容易ならしめる。ここに
印刷合わせ成形とは、予じめ印刷された熱可塑性
樹脂シートの熱成形において、印刷された模様
（文字などを含む）が成形品の所定の位置に来る
ようにして行なわれる成形で、ある。印刷合わせ
成形を行なうには、シートの送り精度、加熱時の
シートのドローダウン対応、シートの収縮率（流
れ方向および幅方向）などの厳重な規整が要求さ
れる。しかし例えば発泡ポリスチレンシートの場
合などは、シートの収縮率の規整はかなり困難で
あり、また一回の成形における面積が大になれば
なるほどシートの中心部分と四隅部分との差は大
きくならざるをえない。その結果として、シート
内の位置によつて成形に良、不良の差が生じるこ
ととなる。しかし乍ら、本発明においては、周囲
部分はシートにおけるガラス転移点以下の低い温
度であるからシート全体としての収縮がおきるな
どのことがなく、成形部分のみ加熱されて好適に
成形することができる。また本発明の加熱方法の
一変形として、成形部分にごく近い周囲部分のみ
を最も高温にした場合には周囲部分からのシート
の引き込みが容易に行なわれる利点がある。さら
に(ii)二種以上のシート、例えば発泡ポリスチレン
にポリエチレンシートを貼合した複合シートの場
合には、スクラツプを原料に戻すことはできない
ため、そのスクラツプは低評価に甘んじなければ
ならない。またこのような複合シートをそれぞれ
の材料にひき離す（ひきはがす）ことは決して容
易でない。しかしこのような不均一加熱をするこ
とにより、スクラツプ部分はひき離し（ひきはが
し）が容易となり、それぞれの材料が、原料とし
て回収されることを可能とする。特に、異種素材
を貼合わせたシートによる印刷合わせ成形におい
て、周囲部分を未印刷状態とした場合には、ひき
離しにより、そのスクラツプ価値は非常に高めら
れる。 The heating method of the present invention relatively mainly brings the molded part to a high temperature and the surrounding part to a low temperature. That is, the molded part is brought to the appropriate temperature for the purpose of molding, and the surrounding part is brought to a low temperature below the glass transition point of the material used for the sheet.The shape, thickness, etc. of the intended molded product and the arrangement of the mold Depending on the situation, it is possible to arbitrarily set an appropriate temperature part for the purpose of molding, a higher temperature part or a lower temperature part than that part. It is also a preferred embodiment to provide an appropriate temperature gradient in each part of the molded part or surrounding part. The low and high temperatures in these cases are relative, and are generally appropriately determined based on the softening temperature and heating time of the sheet. Furthermore, as a variation of the peripheral region low-temperature heating method, a method in which only the peripheral region very close to the molded portion is heated to a slightly higher temperature than the molded portion is also an embodiment of the present invention. Generally, the highest temperature part in the present invention is selected at a temperature that allows molding depending on the molding method of the material used. The following means are mainly used to partially vary the thermal conductivity of the hot plate surface. Fig. 1 shows a heating plate 1 with a defect 3. By making the defect face the surrounding area of the molding, the forming area is heated to a high temperature and the surrounding area is heated to a lower temperature (glass transition temperature). can be heated to temperatures as low as: Second
In the figure, a heat insulating material 4 is loaded into the defective part 3 to further increase the degree of non-uniform heating. In FIG. 3, the shape of the defective portion 3 is trapezoidal, and the temperature gradient is smoother than in FIG. 1. A curved cutout 3 may be used instead of the trapezoid shown in FIG. FIG. 4 shows an example in which an auxiliary heater 5 is used in the defective portion 3, and instead of the auxiliary heater 5, a cooling pipe may be incorporated. The size of the defective portion 3, the material of the heat insulating material 4, and the size of the portion in which the heat insulating material 4 is loaded are appropriately selected depending on the degree of non-uniform heating to be obtained. The means for achieving non-uniform heating is not limited to these examples, and combinations thereof are also possible. Further, a slight gap may be provided between the hot plate and the sheet. According to the present invention, the following effects can be obtained when micro-uniform heating is performed. That is, for example, (i) it facilitates printing alignment molding (also referred to as registration molding). Printed lamination molding here refers to thermoforming of a pre-printed thermoplastic resin sheet so that the printed pattern (including letters, etc.) is placed at a predetermined position on the molded product. be. Printing and molding requires strict regulations such as sheet feeding accuracy, sheet drawdown response during heating, and sheet shrinkage rate (in machine direction and width direction). However, in the case of foamed polystyrene sheets, for example, it is quite difficult to regulate the shrinkage rate of the sheet, and the larger the area in one molding, the larger the difference between the center part and the four corners of the sheet. No. As a result, there is a difference between good and bad molding depending on the position within the sheet. However, in the present invention, since the temperature of the surrounding area is low, below the glass transition point of the sheet, the sheet as a whole does not shrink, and only the molding area is heated, allowing suitable molding. . Further, as a modification of the heating method of the present invention, when only the surrounding area very close to the molded part is heated to the highest temperature, there is an advantage that the sheet can be easily drawn in from the surrounding area. Furthermore, in the case of (ii) a composite sheet made of two or more types of sheets, such as a polyethylene sheet bonded to expanded polystyrene, the scrap cannot be returned to the raw material, so the scrap must be given a low rating. Furthermore, it is by no means easy to separate (peel off) such a composite sheet into its respective materials. However, by applying such non-uniform heating, the scrap portion can be easily separated, and each material can be recovered as a raw material. Particularly in printing and molding of sheets made of different materials pasted together, when the surrounding portions are left unprinted, the scrap value is greatly increased by separating the sheets.
以下実施例により本発明の実施態様を説明す
る。 Embodiments of the present invention will be described below with reference to Examples.
実施例
内部にヒーターを装着した厚さ50mmの鉄製熱板
に、第１図の如き欠損部を形成した。欠損部とは
逆の凸部（側面が長方形、平面は円形）の形状は
直径190mm、高さ５mmの円柱状である（欠損部に
おける熱板の厚さは45mmとなる）。一方凹部（欠
損部）には、凸部の外周５mmを残して、厚さ５mm
のグラスウール製の断熱材を装着した。厚さ2.3
mmの発泡ポリスチレンシートに、厚さ0.13mmのハ
イインパクトポリスチレンシートを貼り合わせた
シートを、上下一対の上記熱板に挾んで加熱し
た。ハイインパクトポリスチレンシートにはピツ
チ模様が印刷してあり、成形後所定の位置に所定
の模様が表われるように計画されている。シート
の加熱温度は、発泡ポリスチレンシート側の最高
温部が140℃、最低温部（断熱材部）が60℃、ハ
イインパクトポリスチレン側の最高温部が130℃、
最低温部が60℃であり、加熱時間は５秒であつ
た。Example A defect as shown in FIG. 1 was formed in a 50 mm thick iron hot plate equipped with a heater inside. The convex portion opposite to the defective portion (rectangular sides, circular plane) has a cylindrical shape with a diameter of 190 mm and a height of 5 mm (the thickness of the hot plate at the defective portion is 45 mm). On the other hand, the concave part (missing part) has a thickness of 5 mm, leaving a 5 mm outer circumference of the convex part.
A glass wool insulation material was installed. Thickness 2.3
A sheet made by laminating a high-impact polystyrene sheet with a thickness of 0.13 mm to a foamed polystyrene sheet with a thickness of 0.1 mm was sandwiched between a pair of upper and lower heating plates and heated. A pitch pattern is printed on the high-impact polystyrene sheet, and it is planned that the pattern will appear at a predetermined position after molding. The heating temperature of the sheet is 140°C at the highest temperature part on the expanded polystyrene sheet side, 60°C at the lowest temperature part (insulation material part), and 130°C at the highest temperature part on the high impact polystyrene side.
The lowest temperature part was 60°C, and the heating time was 5 seconds.
このような不均一加熱を行なつた後、どんぶり
状金型を用いてどんぶり状容器（底部は80mmφ、
開口部は158mmφ、高さは80mm）を成形した。成
形にあたつては熱板の凸部で加熱された部分が、
成形部分に対応するようにした。得られたどんぶ
り状容器は、ピツチ模様が所定の位置に正確に表
われたものであつた。一方均一加熱を行なつた場
合には、発泡ポリスチレンシートの収縮のバラツ
キのために、成形品上の模様の位置にずれが生じ
良品が得られにくかつた。 After performing such uneven heating, a bowl-shaped container (bottom is 80mmφ,
The opening was 158mmφ and the height was 80mm). During molding, the part heated by the convex part of the hot plate,
Made it compatible with molded parts. The resulting bowl-shaped container had pitch patterns accurately displayed at predetermined positions. On the other hand, when uniform heating was performed, the pattern on the molded product was misaligned due to variations in the shrinkage of the expanded polystyrene sheet, making it difficult to obtain a good product.
第１図は本発明の実施例を示すもので、本発明
に使用される熱板間にシートを通した状態を示す
縦断面図、第２〜第４図は本発明の他の実施例を
示すもので、本発明に使用される熱板の要部縦断
面図である。
１…熱板。
Fig. 1 shows an embodiment of the present invention, and is a longitudinal sectional view showing a state in which a sheet is passed between hot plates used in the invention, and Figs. 2 to 4 show other embodiments of the invention. FIG. 2 is a vertical sectional view of a main part of a hot plate used in the present invention. 1...Hot plate.
Claims (1)
トからなるシートを熱板にて両面から加熱し、そ
の後成形する方法であつて、表面の熱伝導性が部
分的に異なる熱板を使用して、相対的に主として
成形部分を高温に、その周囲部分をシートにおけ
るガラス転移点以下の低い温度に加熱することを
特徴とする熱可塑性合成樹脂シートの加熱成形方
法。1 A method in which a sheet consisting of at least one layer of thermoplastic synthetic resin foam sheet is heated from both sides with a hot plate, and then molded. 1. A method for thermoforming a thermoplastic synthetic resin sheet, which is characterized by heating mainly the molded part to a high temperature and the surrounding part to a low temperature below the glass transition point of the sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11255083A JPS604024A (en) | 1983-06-22 | 1983-06-22 | Thermoforming process of thermoplastic synthetic resin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11255083A JPS604024A (en) | 1983-06-22 | 1983-06-22 | Thermoforming process of thermoplastic synthetic resin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS604024A JPS604024A (en) | 1985-01-10 |
| JPS6330133B2 true JPS6330133B2 (en) | 1988-06-16 |
Family
ID=14589461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11255083A Granted JPS604024A (en) | 1983-06-22 | 1983-06-22 | Thermoforming process of thermoplastic synthetic resin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS604024A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61172722A (en) * | 1985-01-25 | 1986-08-04 | Miyuuchiyuaru:Kk | Heat forming of thermoplastic sheet |
| JPH10264908A (en) * | 1997-03-26 | 1998-10-06 | Matsushita Electric Ind Co Ltd | Method for heat-molding belt-like film |
| CN103358537B (en) * | 2013-07-19 | 2016-01-20 | 广东达诚机械有限公司 | Plastic sheet pneumatic thermoforming machine temperature acquisition control system and plastic sheet pneumatic thermoforming machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5639258A (en) * | 1979-09-10 | 1981-04-14 | Kashii Tetsukou Kk | Method of building handrail |
| JPS5898218A (en) * | 1981-12-08 | 1983-06-11 | Oomori Kikai Kogyo Kk | Heat forming method of film |
| JPS59199206A (en) * | 1983-04-27 | 1984-11-12 | Sekisui Plastics Co Ltd | Method and apparatus for heating thermoplastic resin sheet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5860414U (en) * | 1981-10-20 | 1983-04-23 | 出光石油化学株式会社 | Thermoforming sheet direct heating device |
-
1983
- 1983-06-22 JP JP11255083A patent/JPS604024A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5639258A (en) * | 1979-09-10 | 1981-04-14 | Kashii Tetsukou Kk | Method of building handrail |
| JPS5898218A (en) * | 1981-12-08 | 1983-06-11 | Oomori Kikai Kogyo Kk | Heat forming method of film |
| JPS59199206A (en) * | 1983-04-27 | 1984-11-12 | Sekisui Plastics Co Ltd | Method and apparatus for heating thermoplastic resin sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS604024A (en) | 1985-01-10 |
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