JPH0114015B2 - - Google Patents
Info
- Publication number
- JPH0114015B2 JPH0114015B2 JP58075500A JP7550083A JPH0114015B2 JP H0114015 B2 JPH0114015 B2 JP H0114015B2 JP 58075500 A JP58075500 A JP 58075500A JP 7550083 A JP7550083 A JP 7550083A JP H0114015 B2 JPH0114015 B2 JP H0114015B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- resin foam
- heating
- foam sheet
- thermoforming
- 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 88
- 229920005992 thermoplastic resin Polymers 0.000 claims description 55
- 239000006260 foam Substances 0.000 claims description 53
- 238000003856 thermoforming Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 229920006248 expandable polystyrene Polymers 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 239000004745 nonwoven fabric Substances 0.000 claims 1
- 238000000465 moulding Methods 0.000 description 8
- 238000007665 sagging Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001120 nichrome Inorganic materials 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
- B29B13/023—Half-products, e.g. films, plates
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
Description
【発明の詳細な説明】
＜産業上の利用分野＞
この発明は、熱可塑性樹脂発泡シートの熱成形
における加熱方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a heating method for thermoforming a thermoplastic resin foam sheet.
＜従来技術＞
熱可塑性樹脂発泡シートの熱成形における加熱
成形工程において従来は赤外線ヒータによる輻射
加熱或いは加熱板による伝熱加熱および輻射加熱
を主体とした全面同時加熱方法が採用されてお
り、他には熱可塑性樹脂発泡シートの特性に応じ
て熱風加熱等の方法が採用されている。<Prior art> Conventionally, in the thermoforming process of thermoforming thermoplastic resin foam sheets, a simultaneous heating method for the entire surface, mainly consisting of radiant heating using an infrared heater, or conductive heating and radiant heating using a heating plate, has been adopted. Methods such as hot air heating are adopted depending on the characteristics of the thermoplastic resin foam sheet.
＜発明が解決しようとする課題＞
しかし、このような全面同時加熱方法を採用し
た場合には、加熱された熱可塑性樹脂発泡シート
が軟化してたるみを生じやすく、加熱むら、成形
型へのひつかかり等を発生させることとなる。特
に位置合わせ成形にあつては、加熱時の模様のず
れが大きくなり（第６図参照）、強延伸シートに
あつては、加熱時の偏肉を生じやすいこととな
る。また、全面同時加熱であるから、外乱の影響
を受けやすく、熱可塑性樹脂発泡シートに対する
加熱温度制御が困難となる。<Problems to be Solved by the Invention> However, when such a method of simultaneously heating the entire surface is adopted, the heated thermoplastic resin foam sheet tends to soften and sag, resulting in uneven heating and strain on the mold. This will cause problems such as sticking. Particularly in the case of alignment molding, the deviation of the pattern during heating becomes large (see FIG. 6), and in the case of strongly stretched sheets, uneven thickness is likely to occur during heating. Furthermore, since the entire surface is heated simultaneously, it is susceptible to external disturbances, making it difficult to control the heating temperature for the thermoplastic resin foam sheet.
この発明は、加熱時における熱可塑性樹脂発泡
シートのたるみを防止するとともに、加熱温度制
御を容易に行ない得るようにして上記の欠点を解
消することを目的とする。 The object of the present invention is to prevent the thermoplastic resin foam sheet from sagging during heating and to easily control the heating temperature, thereby eliminating the above-mentioned drawbacks.
＜課題を解決するための手段＞
かかる目的を達成するための、この発明の熱可
塑性樹脂発泡シートの熱成形における加熱方法
は、隣り合う発熱体同士が離間し、かつ対向する
発熱体同士が正対するように取り付けられた上下
加熱板間に熱可塑性樹脂発泡シートを導入し、該
熱可塑性樹脂発泡シートに発熱体を当接させ、発
熱体にて熱可塑性樹脂発泡シートをその上下面か
ら挾持し、熱可塑性樹脂発泡シートに熱成形域と
して加熱軟化部分を点在させ、その周囲には格子
状非加熱部分を残存させることを特徴としてい
る。<Means for Solving the Problems> In order to achieve the above object, the heating method for thermoforming a thermoplastic resin foam sheet of the present invention is such that adjacent heating elements are spaced apart from each other, and opposing heating elements are placed in the opposite direction. A thermoplastic resin foam sheet is introduced between the upper and lower heating plates attached so as to face each other, a heating element is brought into contact with the thermoplastic resin foam sheet, and the thermoplastic resin foam sheet is held between the upper and lower surfaces by the heating element. , the thermoplastic resin foam sheet is characterized by having heat-softened parts dotted as thermoforming areas, and leaving lattice-shaped non-heated parts around the heat-softened parts.
＜作用＞
上記のように構成されたこの発明の熱可塑性樹
脂発泡シートの熱成形における加熱方法によれ
ば、隣り合う発熱体同士が離間し、かつ対向する
発熱体同士が正対するように取り付けられた上下
加熱板間に熱可塑性樹脂発泡シートを導入し、該
熱可塑性樹脂発泡シートに発熱体を当接させ、発
熱体にて熱可塑性樹脂発泡シートをその上下面か
ら挾持し、熱可塑性樹脂発泡シートに熱成形域と
して加熱軟化部分を点在させ、その周囲には格子
状非加熱部分を残存させるゆえ、熱可塑性樹脂発
泡シート全体のたるみ、加熱むらを防止でき、軟
化部分を成形するさいの成形型へのひつかかり等
を防止でき、確実な位置合せ成形を行なうことが
できる。<Function> According to the heating method for thermoforming a thermoplastic resin foam sheet of the present invention configured as described above, adjacent heating elements are spaced apart from each other, and opposing heating elements are attached so as to directly face each other. A thermoplastic resin foam sheet is introduced between the upper and lower heating plates, a heating element is brought into contact with the thermoplastic resin foam sheet, and the thermoplastic resin foam sheet is held between the upper and lower surfaces by the heating element, and the thermoplastic resin foaming is performed. Because the sheet is dotted with heat-softened parts as thermoforming areas, and a lattice-shaped non-heated part remains around them, sagging and uneven heating of the entire thermoplastic resin foam sheet can be prevented, and when the softened parts are molded, It is possible to prevent snagging on the mold, etc., and to perform molding with reliable alignment.
＜実施例＞
以下、この発明について、実施例を示す添付図
面によつて詳細に説明する。<Examples> Hereinafter, the present invention will be described in detail with reference to the accompanying drawings showing examples.
第１図はこの発明の実施に使用する加熱装置の
一例を示す側面図、第２図は加熱板１の平面図で
ある。 FIG. 1 is a side view showing an example of a heating device used in carrying out the present invention, and FIG. 2 is a plan view of a heating plate 1. As shown in FIG.
１は加熱板であり、２は１対の加熱板１の互に
対抗する面に設けた発熱体であり、３はエンドレ
スチエーンであり、４は熱可塑性樹脂発泡シート
であり、５は加熱板１を互に近接し、域は離間す
る方向に移動させるシリンダーである。 1 is a heating plate, 2 is a heating element provided on opposing surfaces of a pair of heating plates 1, 3 is an endless chain, 4 is a thermoplastic resin foam sheet, and 5 is a heating plate 1 are moved toward each other, and the regions are moved in the direction of moving away from each other.
ここで、加熱板１としては、例えばニクロムシ
ーズヒータ６を埋設したアルミニウム板を用いる
ことにより、加熱板１自体による赤外線放射率を
小さくし、発熱体２としては、例えばカーボン、
陶磁器等を用いることにより、発熱体２自体によ
る赤外線放射率を大きくしている。 Here, as the heating plate 1, for example, an aluminum plate with a nichrome sheathed heater 6 embedded therein is used to reduce the infrared emissivity of the heating plate 1 itself, and as the heating element 2, for example, carbon, carbon, etc.
By using ceramics or the like, the infrared emissivity of the heating element 2 itself is increased.
以上の構成になる加熱装置の作用は次のとおり
である。 The operation of the heating device configured as described above is as follows.
ニクロムシーズヒータ６に通電することによ
り、加熱板１および発熱体２を昇温させ、次いで
シリンダー５を駆動することにより加熱板１，１
を互に接近させ、発熱体２，２…によつて熱可塑
性樹脂発泡シート４を挾持する。そして、発熱体
２，２…による熱可塑性樹脂発泡シート４の挾持
を所定時間継続すれば、発熱体２，２…により挾
持された部分は、充分な赤外線輻射および熱伝導
によつて軟化するが、他の部分は、加熱板１，１
による不充分な赤外線輻射、および空気対流によ
る加熱を受けるのみであり、軟化せず、熱可塑性
樹脂発泡シートに加熱軟化部分が点在するととも
に、その周囲に格子状非加熱部分が存在するもの
となる。 By energizing the nichrome sheathed heater 6, the temperature of the heating plate 1 and the heating element 2 is raised, and then by driving the cylinder 5, the temperature of the heating plates 1 and 1 is increased.
are brought close to each other, and the thermoplastic resin foam sheet 4 is sandwiched between the heating elements 2, 2, . If the thermoplastic resin foam sheet 4 is held between the heating elements 2, 2... for a predetermined period of time, the portions held by the heating elements 2, 2... will be softened by sufficient infrared radiation and heat conduction. , the other parts are the heating plates 1, 1
The thermoplastic resin foam sheet is only heated by insufficient infrared radiation and air convection, and does not soften, and the thermoplastic resin foam sheet is dotted with heat-softened parts, and there are lattice-shaped non-heated parts around them. Become.
その後は、シリンダー５，５により加熱板１，
１を復動させ、次いでエンドレスチエーン３にて
熱可塑性樹脂発泡シート４を所定距離移送する。
そして、移送位置で真空成形等の公知のシート成
形を行なう（図示せず）と同時に、もとの位置で
はシリンダー５，５により加熱板１，１を互に近
接させ、以て熱可塑性樹脂発泡シート４の部分的
な加熱、軟化を行なう。 After that, the heating plate 1,
1 is moved back, and then the thermoplastic resin foam sheet 4 is transported a predetermined distance by the endless chain 3.
Then, at the transfer position, known sheet forming such as vacuum forming is performed (not shown), and at the same time, at the original position, the heating plates 1, 1 are brought close to each other by the cylinders 5, 5, thereby forming the thermoplastic resin foam. The sheet 4 is partially heated and softened.
なお、上記シート成形にあたつては、発熱体
２，２…で軟化された部分が、熱可塑性樹脂発泡
シートに多数同時に成形されるコツプ等の容器の
側壁と底部に該当するように位置合せを行なう。 In addition, when forming the sheet, the parts softened by the heating elements 2, 2, etc. are aligned so that they correspond to the side walls and bottoms of containers such as pots that are simultaneously molded in large numbers on thermoplastic resin foam sheets. Do this.
以上のように、熱可塑性樹脂発泡シート４に、
熱成形域としての加熱軟化部分７，７を点在さ
せ、この加熱軟化部分７，７の周囲に格子状非軟
化部分８を残存させるものゆえ、非軟化部分８に
よつて加熱、軟化部分７，７…の歪を防止でき、
熱可塑性樹脂発泡シート４の幅方向の伸びを抑制
し、熱可塑性樹脂発泡シート４全体のたるみを防
止することができる。 As mentioned above, in the thermoplastic resin foam sheet 4,
Since the heat-softened parts 7, 7 as thermoforming regions are scattered, and the lattice-shaped non-softened parts 8 remain around the heat-softened parts 7, 7, the non-softened parts 8 heat and soften the softened parts 7. , 7... can be prevented from distortion,
It is possible to suppress the expansion of the thermoplastic resin foam sheet 4 in the width direction and prevent the entire thermoplastic resin foam sheet 4 from sagging.
したがつて、シート４の軟化部分７，７を成形
するさいの加熱むら、成形型へのひつかかり等を
防止することができ、特に位置合せ成形において
は、加熱時の模様ずれを防止して正確な位置合せ
成形を行なうことができる。 Therefore, it is possible to prevent uneven heating, sticking to the mold, etc. when molding the softened portions 7, 7 of the sheet 4, and especially in alignment molding, it is possible to prevent pattern shift during heating. Accurate alignment molding can be performed.
具体例としては、熱可塑性樹脂発泡シートの材
質を発泡ポリスチレンシートとした場合について
以下に説明する。 As a specific example, a case where the material of the thermoplastic resin foam sheet is a foamed polystyrene sheet will be described below.
発泡ポリスチレンシート成形上の適性加熱温度
は120℃〜160℃であるから、発熱体２，２…の温
度を120℃〜160℃とする必要があり、発熱体２，
２…の温度をこの範囲に設定した場合には、発泡
ホリスチレンシートの非軟化部分８の表面温度は
シート軟化温度以下の90℃以下であつた。 Since the appropriate heating temperature for forming polystyrene foam sheets is 120°C to 160°C, it is necessary to set the temperature of the heating elements 2, 2, etc. to 120°C to 160°C.
When the temperature of No. 2 was set within this range, the surface temperature of the non-softened portion 8 of the foamed polystyrene sheet was 90° C. or lower, which is the sheet softening temperature.
この場合において、発熱体２，２…の温度が
120℃〜160℃と比較的低温であるため、一般的に
は、発泡ポリスチレンシートを120℃〜160℃に加
熱するのに長時間を要し、生産能率が低下すると
思われるが、この発明においては、発熱体２，２
…により発泡ポリスチレンシートを挾持し、しか
も発熱体２，２…からの赤外線放射率を大きくし
ているので、ステフアン・ボルツマン公式から明
らかなように、発熱体２，２…の表面温度の４乗
に比例し、かつ発熱体２，２…と発泡ポリスチレ
ンシートとの距離の２乗に反比例する赤外線輻射
強度により、発泡ポリスチレンシートを短時間で
適性加熱温度にまで昇温させることができた（第
４図参照。但し、同図は発泡ポリスチレンシート
として240ｇ／m2のものを用い、発熱体２の温度
を130℃とし発泡ポリスチレンシートの必要温度
を120℃とした場合を示している。）。 In this case, the temperature of the heating elements 2, 2...
Since the temperature is relatively low at 120°C to 160°C, it generally takes a long time to heat the foamed polystyrene sheet to 120°C to 160°C, which is thought to reduce production efficiency. is heating element 2,2
Since the expanded polystyrene sheet is held between the polystyrene sheets and the infrared emissivity from the heating elements 2, 2... is increased, as is clear from the Stefan-Boltzmann formula, the surface temperature of the heating elements 2, 2... is raised to the fourth power. The foamed polystyrene sheet could be heated to the appropriate heating temperature in a short time by the infrared radiation intensity, which is proportional to (See Figure 4. However, this figure shows the case where a foamed polystyrene sheet of 240 g/m 2 is used, the temperature of the heating element 2 is 130°C, and the required temperature of the foamed polystyrene sheet is 120°C.)
また、熱可塑性樹脂発泡シートとしては、例え
ば発泡合成樹脂シートと非発泡合成樹脂シートと
を積層した複合品を用いることもできる。 Further, as the thermoplastic resin foam sheet, for example, a composite product in which a foamed synthetic resin sheet and a non-foamed synthetic resin sheet are laminated can also be used.
第５図はこの発明に用いる加熱装置の他の実施
例を示す要部拡大縦断側面図であり、上記実施例
と異なる点は、発熱体２の、熱可塑性樹脂発泡シ
ート４と接する面に、多数の断面半円状の凹部か
らなる空気だまり９，９…を設けたものであり、
発熱体２，２で熱可塑性樹脂発泡シート４を挾持
したさいに熱可塑性樹脂発泡シート４と発熱体
２，２間に発生する幅広な空気層にて、良好な熱
伝導が行なわれなくなるのを防止でき、発熱体２
と熱可塑性樹脂発泡シート４との密着性を向上さ
せ得ることができるとともに、発熱体２，２…に
よる挾持を解除した時点における熱可塑性樹脂発
泡シート４の移動、変形を防止することができ
る。 FIG. 5 is an enlarged longitudinal sectional side view of the main part showing another embodiment of the heating device used in the present invention, and the difference from the above embodiment is that the heating element 2 has a surface in contact with the thermoplastic resin foam sheet 4. It is provided with air pockets 9, 9... consisting of a large number of recesses having a semicircular cross section,
When the thermoplastic resin foam sheet 4 is sandwiched between the heating elements 2, 2, a wide air layer that is generated between the thermoplastic resin foam sheet 4 and the heating elements 2, 2 prevents good heat conduction. Can be prevented, heating element 2
It is possible to improve the adhesion between the thermoplastic resin foam sheet 4 and the thermoplastic resin foam sheet 4, and it is also possible to prevent the thermoplastic resin foam sheet 4 from moving or deforming when it is released from being held by the heating elements 2, 2, . . .
＜発明の効果＞
以上のようにこの発明の熱可塑性樹脂発泡シー
トの熱成形における加熱方法は、隣り合う発熱体
同士が離間し、かつ対向する発熱体同士が正対す
るように取り付けられた上下加熱板間に熱可塑性
樹脂発泡シートを導入し、該熱可塑性樹脂発泡シ
ートに発熱体を当接させ、発熱体にて熱可塑性樹
脂発泡シートをその上下面から挾持し、熱可塑性
樹脂発泡シートに熱成形域として加熱軟化部分を
点在させ、その周囲には格子状非加熱部分を残存
させるものゆえ、熱可塑性樹脂発泡シート全体の
たるみ、加熱むらを防止でき、軟化部分を成形す
るさいの成形型へのひつかかり等を確実に防止で
きるのみならず、適確なな位置での確実な位置合
せ成形を行なうことができるという特有の効果を
奏する。<Effects of the Invention> As described above, the heating method for thermoforming a thermoplastic resin foam sheet of the present invention is a vertical heating method in which adjacent heating elements are separated from each other and opposing heating elements are installed so that they directly face each other. A thermoplastic resin foam sheet is introduced between the plates, a heating element is brought into contact with the thermoplastic resin foam sheet, the thermoplastic resin foam sheet is held between the upper and lower surfaces by the heating element, and heat is applied to the thermoplastic resin foam sheet. As the molding area is dotted with heat-softened parts, and a lattice-shaped non-heated part remains around them, sagging and uneven heating of the entire thermoplastic resin foam sheet can be prevented, and the mold can be used when molding the softened parts. This has the unique effect of not only being able to reliably prevent pinching, etc., but also being able to reliably perform alignment molding at an appropriate position.
第１図はこの発明の実施に使用する熱可塑性樹
脂発泡シートの熱成形における加熱装置の側面
図、第２図は加熱板１の平面図、第３図Ａは部分
的に加熱、軟化された熱可塑性樹脂発泡シートの
平面図、同図Ｂは同正面図、第４図は発泡ポリス
チレンシートの温度上昇を示す図、第５図はこの
発明の実施に使用する熱可塑性樹脂発泡シート加
熱装置の他の実施例を示す要部拡大縦断側面図、
第６図Ａは全面にわたつて加熱、軟化された熱可
塑性樹脂発泡シートの平面図、同図Ｂは同正面図
である。
１……加熱板、２……発熱体、４……熱可塑性
樹脂発泡シート、９……空気だまり。
Figure 1 is a side view of a heating device for thermoforming a thermoplastic foam sheet used in the practice of this invention, Figure 2 is a plan view of the heating plate 1, and Figure 3A is a partially heated and softened sheet. FIG. 4 is a diagram showing the temperature rise of the foamed polystyrene sheet; FIG. An enlarged longitudinal sectional side view of main parts showing another embodiment,
FIG. 6A is a plan view of a thermoplastic resin foam sheet that has been heated and softened over its entire surface, and FIG. 6B is a front view thereof. 1... Heating plate, 2... Heating element, 4... Thermoplastic resin foam sheet, 9... Air pocket.
Claims (1)
発熱体同士が正対するように取り付けられた上下
加熱板間に熱可塑性樹脂発泡シートを導入し、該
熱可塑性樹脂発泡シートに発熱体を当接させ、発
熱体にて熱可塑性樹脂発泡シートをその上下面か
ら挾持し、熱可塑性樹脂発泡シートに熱成形域と
して加熱軟化部分を点在させ、その周囲には格子
状非加熱部分を残存させることを特徴とする熱可
塑性樹脂発泡シートの熱成形における加熱方法。 ２ 波長が5μｍ〜25μｍの赤外線輻射により加熱
する上記特許請求の範囲第１項記載の熱可塑性樹
脂発泡シートの熱成形における加熱方法。 ３ 熱可塑性樹脂発泡シートが発泡ポリスチレン
シート又はその複合品である上記特許請求の範囲
第１項記載の熱可塑性樹脂発泡シートの熱成形に
おける加熱方法。 ４ 発熱体が円形又は角形からなるものである上
記特許請求の範囲第１項記載の熱可塑性樹脂発泡
シートの熱成形における加熱方法。 ５ 発熱体が表面に多数の凹部からなる空気だま
りを設けたものからなる上記特許請求の範囲第１
項記載の熱可塑性樹脂発泡シートの熱成形におけ
る加熱方法。[Claims] 1. A thermoplastic resin foam sheet is introduced between upper and lower heating plates installed so that adjacent heating elements are separated from each other and opposing heating elements directly face each other, and the thermoplastic resin foam sheet is A heating element is brought into contact with the heating element, the thermoplastic resin foam sheet is sandwiched between the upper and lower surfaces of the thermoplastic resin foam sheet, heat-softened parts are dotted on the thermoplastic resin foam sheet as thermoforming areas, and a lattice-shaped non-woven fabric is placed around the heating element. A heating method for thermoforming a thermoplastic resin foam sheet, characterized by leaving a heated portion. 2. A heating method for thermoforming a thermoplastic resin foam sheet according to claim 1, which heats by infrared radiation having a wavelength of 5 μm to 25 μm. 3. A heating method for thermoforming a foamed thermoplastic resin sheet according to claim 1, wherein the foamed thermoplastic resin sheet is a foamed polystyrene sheet or a composite thereof. 4. A heating method for thermoforming a thermoplastic resin foam sheet according to claim 1, wherein the heating element is circular or square. 5. Claim 1 above, in which the heating element has an air pocket consisting of a large number of recesses on its surface.
A heating method for thermoforming a thermoplastic resin foam sheet as described in 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58075500A JPS59199206A (en) | 1983-04-27 | 1983-04-27 | Method and apparatus for heating thermoplastic resin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58075500A JPS59199206A (en) | 1983-04-27 | 1983-04-27 | Method and apparatus for heating thermoplastic resin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59199206A JPS59199206A (en) | 1984-11-12 |
| JPH0114015B2 true JPH0114015B2 (en) | 1989-03-09 |
Family
ID=13578039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58075500A Granted JPS59199206A (en) | 1983-04-27 | 1983-04-27 | Method and apparatus for heating thermoplastic resin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59199206A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS604024A (en) * | 1983-06-22 | 1985-01-10 | Nippon Zanpatsuku Kk | Thermoforming process of thermoplastic synthetic resin sheet |
| JPS604023A (en) * | 1983-06-22 | 1985-01-10 | Nippon Zanpatsuku Kk | Thermoforming process of thermoplastic synthetic resin sheet |
| JPS61193825A (en) * | 1985-02-22 | 1986-08-28 | Sekisui Plastics Co Ltd | Method of heating foamed sheet in molding sheet |
| JPS61225024A (en) * | 1985-03-29 | 1986-10-06 | Sekisui Plastics Co Ltd | Method for heating foamed sheet in molding of sheet |
| JPS62114720U (en) * | 1986-01-10 | 1987-07-21 | ||
| JPS62178130U (en) * | 1986-04-30 | 1987-11-12 | ||
| US4740342A (en) * | 1986-08-15 | 1988-04-26 | Personal Products Company | Thermoforming flexible plastic foam shells |
| DE102007009384B4 (en) * | 2007-02-20 | 2020-11-26 | Faurecia Innenraum Systeme Gmbh | Process for back-molding a film |
| JP2009078359A (en) * | 2007-09-25 | 2009-04-16 | Fujifilm Corp | Method for producing thermoplastic resin film |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5134959A (en) * | 1974-09-19 | 1976-03-25 | Mitsubishi Monsanto Chem | Seikeihin no seizohoho |
| JPS54125260A (en) * | 1978-03-23 | 1979-09-28 | Kubota Ltd | Film heating device |
| JPS5595519A (en) * | 1979-01-16 | 1980-07-19 | Hitachi Ltd | Heat forming device |
| JPS58110224A (en) * | 1981-12-23 | 1983-06-30 | Nippon Zanpatsuku Kk | Heat-molding method for synthetic resin foaming sheet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52104664U (en) * | 1976-02-03 | 1977-08-09 | ||
| JPS5860414U (en) * | 1981-10-20 | 1983-04-23 | 出光石油化学株式会社 | Thermoforming sheet direct heating device |
-
1983
- 1983-04-27 JP JP58075500A patent/JPS59199206A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5134959A (en) * | 1974-09-19 | 1976-03-25 | Mitsubishi Monsanto Chem | Seikeihin no seizohoho |
| JPS54125260A (en) * | 1978-03-23 | 1979-09-28 | Kubota Ltd | Film heating device |
| JPS5595519A (en) * | 1979-01-16 | 1980-07-19 | Hitachi Ltd | Heat forming device |
| JPS58110224A (en) * | 1981-12-23 | 1983-06-30 | Nippon Zanpatsuku Kk | Heat-molding method for synthetic resin foaming sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59199206A (en) | 1984-11-12 |
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