JP2973346B2 - Manufacturing method of heat compression molded products - Google Patents
Manufacturing method of heat compression molded productsInfo
- Publication number
- JP2973346B2 JP2973346B2 JP15047393A JP15047393A JP2973346B2 JP 2973346 B2 JP2973346 B2 JP 2973346B2 JP 15047393 A JP15047393 A JP 15047393A JP 15047393 A JP15047393 A JP 15047393A JP 2973346 B2 JP2973346 B2 JP 2973346B2
- Authority
- JP
- Japan
- Prior art keywords
- hot
- hot plate
- plastic sheet
- foamed plastic
- press
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は長尺発泡プラスチックシ
−トを熱圧縮して熱圧縮成形品を製造する方法に関し、
特に外観の良好な長尺発泡プラスチックシ−ト熱圧縮成
形品の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a hot-compression molded product by hot-pressing a long foamed plastic sheet.
In particular, the present invention relates to a method for producing a long-sized foamed plastic sheet hot-compressed article having a good appearance.
【０００２】[0002]
【従来の技術】従来より発泡プラスチックシ−トを産業
上の資材として利用する場合、該発泡プラスチックシ−
トをその厚さの４／５〜１／２０程度熱圧縮して該発泡
プラスチックシ−トの比重を増加させ、その表面平滑
性、硬度アップ、伸び及び引張り強度の増大等の特性を
付与することが行われている。そして、この長尺発泡プ
ラスチックシ−トの熱圧縮方法として、通常ホットプレ
スの上下熱板の間に一方の端部より発泡プラスチックシ
−トを導入し、上下より熱板を当てて加熱圧縮し、続い
て熱圧縮された部分を他方の端部より排出すると共に発
泡プラスチックシ−トの新たな部分を熱板間に導入し、
同様に熱圧縮し、この操作を連続的に繰返して行って長
尺発泡プラスチックシ−トを熱圧縮している。しかし、
このような方法によって得られた発泡プラスチックシ−
トの熱圧縮成形品の表面に一定の間隙で筋が発生し、そ
の製品の品質を著しく低下させ、特にこの熱圧縮成形品
の表面にポリ塩化ビニル、ポリプロピレン、ポリエチレ
ン等のプラスチックフィルム等を表皮として積層又は貼
着する場合、熱圧縮時に生じた筋が表皮表面に現れ、こ
れより得られた製品は、その品質を著しく低下させると
いう欠点を有している。2. Description of the Related Art Conventionally, when a foamed plastic sheet is used as an industrial material, the foamed plastic sheet is used.
The foamed plastic sheet is heat-compressed by about 4/5 to 1/20 of its thickness to increase the specific gravity of the foamed plastic sheet, and to impart properties such as surface smoothness, increased hardness, elongation and tensile strength. That is being done. As a method for thermally compressing this long foamed plastic sheet, a foamed plastic sheet is introduced from one end between the upper and lower hot plates of a normal hot press, and heated and compressed by applying a hot plate from above and below. The hot compressed part is discharged from the other end and a new part of the foamed plastic sheet is introduced between the hot plates,
Similarly, heat compression is performed, and this operation is continuously repeated to heat-compress the long foamed plastic sheet. But,
The foamed plastic sheet obtained by such a method
Streaks are generated at certain gaps on the surface of the heat-compressed molded product, which significantly reduces the quality of the product. In particular, plastic films such as polyvinyl chloride, polypropylene, polyethylene, etc. When laminating or sticking, the streaks generated at the time of heat compression appear on the surface of the epidermis, and the product obtained therefrom has a drawback that its quality is significantly reduced.
【０００３】この点を図面をもって説明する。図２は従
来方法の説明図である。図２において、長尺発泡プラス
チックシ−トをホットプレス２の間に挿入し、上下より
熱板２で加熱圧縮し、続いて熱圧縮された部分を他方の
端部より排出すると共に発泡プラスチックシ−トの新た
な部分を熱板間に導入し、同様に熱圧縮し、この操作を
連続的に繰返し行って長尺発泡プラスチックシ−トを熱
圧縮すると、図３に示すように製品の表面に一定の間隔
をもって筋５が表れる。[0003] This point will be described with reference to the drawings. FIG. 2 is an explanatory diagram of the conventional method. In FIG. 2, a long foamed plastic sheet is inserted between hot presses 2, and is heated and compressed by a hot plate 2 from above and below. Subsequently, the heat-compressed portion is discharged from the other end and the foamed plastic sheet is discharged. When a new portion of the sheet is introduced between the hot plates and hot-pressed in the same manner, and this operation is continuously repeated to hot-press the long foamed plastic sheet, as shown in FIG. The muscles 5 appear at regular intervals.
【０００４】[0004]
【発明が解決しようとする課題】本発明者は上記の欠点
について種々検討した結果、熱圧縮したプラスチックシ
−ト表面上に発生する筋はホットプレス端部で導入の時
と排出の時と２度熱圧縮される境界部分に発生している
ことを見出し、これを改良すべく検討した結果、本発明
を完成したもので、本発明の目的は筋のない品質の良好
な長尺発泡プラスチックシ−トの成形方法を提供するこ
とである。As a result of various studies on the above-mentioned drawbacks, the present inventor found that the streaks generated on the surface of the plastic sheet which had been hot-pressed were at the end of the hot press at the time of introduction and at the time of discharge. The present invention was completed as a result of finding out that it occurred at the boundary part which was thermally compressed and studied to improve it. To provide a method for molding the gate.
【０００５】[0005]
【問題点を解決するための手段】本願発明の要旨は、長
尺の発泡プラスチックシ−トをホットプレスの熱板間に
挿入し熱圧縮して長尺発泡プラスチックシ−ト熱圧縮成
形品を製造する方法において、発泡プラスチックシ−ト
のホットプレスへの導入部及び排出部の近傍に熱板の温
度より低い温度の圧力開放領域を設けて熱圧縮すること
を特徴とする熱圧縮成形品の製造方法である。低温度の
圧力開放領域を設ける方法としては、例えば、ホットプ
レスの熱板のシ−ト流れ方向の長さより長い金属板を長
尺発泡プラスチックシ−トと熱板の間に介在させたり、
或いは、熱板自体の両端部を曲率Ｒを設け、この部分を
冷却する等の方法によって行うことができる。そしてこ
のような方法を行うことによって、プラスチックシ−ト
表面に筋が生じない製品が得られる。SUMMARY OF THE INVENTION The gist of the present invention is that a long foamed plastic sheet is inserted between hot plates of a hot press and thermally compressed to produce a long foamed plastic sheet thermocompression molded product. A method for producing a hot-pressed molded article, characterized in that a hot-pressed area is provided near the inlet and outlet of the foamed plastic sheet to the hot press and a pressure release area at a temperature lower than the temperature of the hot plate is provided. It is a manufacturing method. As a method of providing a low temperature pressure release area, for example, a metal plate longer than the length of the hot press hot plate in the sheet flow direction is interposed between the long foamed plastic sheet and the hot plate,
Alternatively, it is possible to provide the curvature R at both ends of the hot plate itself, and cool this portion. By performing such a method, a product having no streaks on the surface of the plastic sheet can be obtained.
【０００６】本発明における発泡プラスチックシ−トと
しては特に限定されるものではないが、発泡ポリプロピ
ン、発泡ポリエチレン、発泡ポリウレタン等があげられ
る。ホットプレスの熱板と発泡プラスチックシ−トとの
間に介在させる金属板としてステンレス板、アルミ板、
鉄板、銅等何れでもよい。この場合、金属板はホットプ
レス熱板より大きいものを使用することが必要であっ
て、ホットプレス熱板よりはみ出した部分は熱板の温度
より低く、圧力開放部を形成する。金属板の大きさとし
てはホットプレス熱板のシ−ト流れ方向長さ約１００ｍ
ｍ程度以上大きくする。この金属板は予め熱板に装着し
てもよく、或は、発泡プラスチックシ−トを挿入時シ−
トと共に挿入してもよい。[0006] The foamed plastic sheet in the present invention is not particularly limited, but examples include foamed polypropylene, foamed polyethylene, foamed polyurethane and the like. Stainless steel plate, aluminum plate, metal plate to be interposed between hot plate of hot press and foam plastic sheet,
Any of iron plate, copper, etc. may be used. In this case, it is necessary to use a metal plate larger than the hot press hot plate, and the portion protruding from the hot press hot plate is lower than the temperature of the hot plate and forms a pressure release portion. The size of the metal plate is about 100 m in the sheet flow direction of the hot press hot plate.
m or more. This metal plate may be attached to a hot plate in advance, or a sheet may be inserted when a foamed plastic sheet is inserted.
May be inserted together with the
【０００７】また、ホットプレスの熱板の両端部に曲率
Ｒをつけると共に該部分を冷却することによって熱板の
温度より低い圧力開放部を形成することができる。この
場合、発泡プラスチックシ−トをホットプレス間に挿入
しやすくなる。なお、熱板の温度より低い温度の圧力開
放領域を設ける方法としては上述の方法を組み合わせて
も良い。例えば、熱板の一方を曲率Ｒをつけると共に該
部分を冷却し、これに対向する他方の熱板に金属板を取
り付けても良い。[0007] Further, it is possible to form a pressure release portion lower than the temperature of the hot plate by providing a curvature R at both ends of the hot plate of the hot press and cooling the portion. In this case, it becomes easy to insert the foamed plastic sheet between the hot presses. The above-described method may be combined as a method for providing a pressure release region at a temperature lower than the temperature of the hot plate. For example, one of the hot plates may be provided with a curvature R and the portion may be cooled, and a metal plate may be attached to the other hot plate opposed thereto.
【０００８】次に図面をもって本発明を説明する。図１
は本発明にかかる製造方法の側面図である。図１（ａ）
において発泡プラスチックシ−ト１はホットプレスの熱
板２上に設けた金属板３の間に挿入されて熱圧縮され
る。金属板３の端部４はホットプレスの熱板２の外方に
はみ出しており、このはみ出し部分の温度は空気に接し
ているので熱板の温度より低く、圧力はホットプレスで
直接加圧している部分より低く、圧力開放部分を形成し
ている。（ｂ）は本発明の他の実施態様の側面図であ
る。図において熱板２の両端部に断熱材８を用いてその
中央部と区画し、この端部に冷却用パイプ７を設置して
冷却部６とし、その表面に曲率Ｒを設ける。このような
熱板でプラスチックシ−トを加圧すると、熱板の両端部
の温度は熱板の中央部の温度より低く、また熱板自体に
曲率Ｒが設けられているので圧力開放部を形成する。Next, the present invention will be described with reference to the drawings. FIG.
FIG. 2 is a side view of the manufacturing method according to the present invention. FIG. 1 (a)
In FIG. 1, the foamed plastic sheet 1 is inserted between metal plates 3 provided on a hot plate 2 of a hot press and thermally compressed. The end 4 of the metal plate 3 protrudes outside the hot plate 2 of the hot press. The temperature of the protruding portion is lower than the temperature of the hot plate because it is in contact with air. Lower than the part where it is, forming a pressure relief part. (B) is a side view of another embodiment of the present invention. In the drawing, a heat insulating material 8 is used at both ends of the hot plate 2 to divide it from the center, and a cooling pipe 7 is installed at this end to form a cooling section 6, and a curvature R is provided on the surface thereof. When the plastic sheet is pressurized with such a hot plate, the temperature at both ends of the hot plate is lower than the temperature at the center of the hot plate, and the hot plate itself has a curvature R. Form.
【０００９】[0009]
【実施例】次に実施例をもって更に本発明を具体的に説
明する。 実施例１ 長さ６０ｍ、幅１０００ｍｍで厚さ１５ｍｍのポリウレ
タンシ−トを幅１５００ｍｍ、奥行（シ−トの流れ方
向）１０００ｍｍのホットプレスを用いて厚さ１．５ｍ
ｍ（１／１０圧縮）熱圧縮する。この場合、図１（ａ）
に示すように、幅１２００ｍｍ、奥行（シ−トの流れ方
向）１２００ｍｍの厚さ３ｍｍの２枚のアルミ板をポリ
ウレタンシ−トと熱板との間に置き、熱板の温度２３０
℃のもとに約３０秒間熱圧縮する。得られた製品の表面
には何等の筋も生せず、外観は極めて良好であった。同
じホットプレスを使用し、上下にアルミ板を使用しない
以外は上述と同じ条件で熱圧縮したところ製品の表面に
は約１０００ｍｍの間隔のもって幅方向に平行な筋が発
生した。Next, the present invention will be described more specifically with reference to the following examples. Example 1 A polyurethane sheet having a length of 60 m and a width of 1000 mm and a thickness of 15 mm was heated to a thickness of 1.5 m using a hot press of 1500 mm in width and 1000 mm in depth (in the flow direction of the sheet).
m (1/10 compression). In this case, FIG.
As shown in the figure, two aluminum plates having a width of 1200 mm and a depth of 1200 mm (sheet flow direction) and a thickness of 3 mm are placed between the polyurethane sheet and the hot plate.
Heat compress at 30 ° C. for about 30 seconds. No streaks were formed on the surface of the obtained product, and the appearance was extremely good. When the same hot press was used and heat compression was performed under the same conditions as above except that no aluminum plate was used on the upper and lower sides, stripes parallel to the width direction were formed on the surface of the product at intervals of about 1000 mm.
【００１０】実施例２ 使用したホットプレスは図１（ｂ）のものを使用した以
外は実施例１と同様の条件で熱圧縮を行った所、表面の
外観が良好な製品が得られた。Example 2 When hot pressing was performed under the same conditions as in Example 1 except that the hot press used was that shown in FIG. 1B, a product having a good surface appearance was obtained.
【００１１】[0011]
【発明の効果】以上述べたように、本発明においては発
泡プラスチックシ−トを熱圧縮するに当り、熱板の温度
より低い温度の圧力開放領域を設けて熱圧縮することに
より、従来のような筋が発生することなく、外観の良好
な長尺の熱圧縮成形品が得られ、これにプラスチックフ
ィルムを表皮として積層した製品は、従来品に比して極
めて良好なすぐれた品質の発泡プラスチック成形品を得
ることができる。As described above, in the present invention, when the foamed plastic sheet is heat-compressed, by providing a pressure release area at a temperature lower than the temperature of the hot plate and heat-compressing the foamed plastic sheet. A long, heat-compressed product with a good appearance is obtained without any streaks, and the product obtained by laminating a plastic film as a skin on this product is a foam plastic of excellent quality, which is much better than conventional products. A molded article can be obtained.
【図１】本発明にかかる熱圧縮方法の側面図FIG. 1 is a side view of a thermal compression method according to the present invention.
【図２】従来の熱圧縮方法の説明図FIG. 2 is an explanatory view of a conventional thermal compression method.
【図３】従来方法で得られた製品の表面の平面図FIG. 3 is a plan view of a surface of a product obtained by a conventional method.
１ 発泡プラスチックシ−ト ２ ホットプレス熱板 ３ 金属板 ４ 金属板端縁部 ５ 筋 ６ 冷却部 ７ 冷却用パイプ ８ 断熱材 DESCRIPTION OF SYMBOLS 1 Foamed plastic sheet 2 Hot press hot plate 3 Metal plate 4 Metal plate edge 5 Streak 6 Cooling part 7 Cooling pipe 8 Insulation material
Claims (3)
プレスの熱板間に挿入し熱圧縮して長尺発泡プラスチッ
クシ−ト熱圧縮成形品を製造する方法において、発泡プ
ラスチックシ−トのホットプレスへの導入部及び排出部
の近傍に熱板の温度より低い温度の圧力開放領域を設け
て熱圧縮することを特徴とする熱圧縮成形品の製造方
法。1. A method for producing a long-sized foamed plastic sheet hot-press molded article by inserting a long foamed plastic sheet between hot plates of a hot press and thermally compressing the same. A method for producing a thermocompression molded product, comprising providing a pressure release area at a temperature lower than the temperature of a hot plate near an inlet and an outlet to a hot press and performing heat compression.
長さより長い金属板を長尺発泡プラスチックシ−トと熱
板の間に介在させて熱板の温度より低い温度の圧力開放
領域を設けた請求項１記載の熱圧縮成形品の製造方法。2. A pressure release area having a temperature lower than the temperature of the hot plate is provided by interposing a metal plate longer than the length of the hot plate of the hot press in the sheet flow direction between the long foamed plastic sheet and the hot plate. The method for producing a thermocompression molded product according to claim 1.
もって上下に開いた部分を設けると共に該部分を冷却し
て熱板の温度より低い温度の圧力開放領域を設けた請求
項１記載の熱圧縮成形品の製造方法。3. A hot-press hot plate according to claim 1, wherein both ends of the hot plate are provided with a vertically open portion having a curvature R, and the portion is cooled to provide a pressure release region at a temperature lower than the temperature of the hot plate. Manufacturing method of thermocompression molded products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15047393A JP2973346B2 (en) | 1993-06-22 | 1993-06-22 | Manufacturing method of heat compression molded products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15047393A JP2973346B2 (en) | 1993-06-22 | 1993-06-22 | Manufacturing method of heat compression molded products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH071487A JPH071487A (en) | 1995-01-06 |
| JP2973346B2 true JP2973346B2 (en) | 1999-11-08 |
Family
ID=15497677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15047393A Expired - Fee Related JP2973346B2 (en) | 1993-06-22 | 1993-06-22 | Manufacturing method of heat compression molded products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2973346B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000225650A (en) | 1999-02-08 | 2000-08-15 | Ykk Corp | Apparatus for forming of projected article made of synthetic resin rising on surface of flat plate-like base |
| KR101553662B1 (en) * | 2014-07-25 | 2015-09-16 | 제일 이엔에스 주식회사 | Hot plate structure of press molding device and continuous molding method using the same |
| CN106042423A (en) * | 2016-06-22 | 2016-10-26 | 强新正品（苏州）环保材料科技有限公司 | Processing method of heat conduction silica gel sheet |
-
1993
- 1993-06-22 JP JP15047393A patent/JP2973346B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH071487A (en) | 1995-01-06 |
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