JPH0722964B2 - Method for producing vinyl chloride sheet for molding - Google Patents
Method for producing vinyl chloride sheet for moldingInfo
- Publication number
- JPH0722964B2 JPH0722964B2 JP3314879A JP31487991A JPH0722964B2 JP H0722964 B2 JPH0722964 B2 JP H0722964B2 JP 3314879 A JP3314879 A JP 3314879A JP 31487991 A JP31487991 A JP 31487991A JP H0722964 B2 JPH0722964 B2 JP H0722964B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- molding
- chloride sheet
- roll
- vinyl chloride
- 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
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は成形用塩化ビニルシー
トの製造方法に関し、さらに詳しくは真空成形等により
シートを再加熱する際に生じるしわの発生を防止せしめ
た塩化ビニルシート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 vinyl chloride sheet for molding, and more particularly to a method for producing a vinyl chloride sheet in which wrinkles are prevented from occurring when the sheet is reheated by vacuum forming or the like.
【０００２】[0002]
【従来の技術】従来における成形用塩化ビニルシート
は、カレンダー成形により圧延したポリ塩化ビニルシー
トの表面にプリント及び絞り模様を施してなり、これに
発泡ポリブロピレンフォーム等の発泡シートとラミネー
トして使用する場合が多い。2. Description of the Related Art A conventional vinyl chloride sheet for molding is formed by printing and drawing a pattern on the surface of a polyvinyl chloride sheet rolled by calender molding, which is laminated with a foamed sheet such as foamed polypropylene polypropylene foam. Often used.
【０００３】[0003]
【発明が解決しようとする課題】上記したようにカレン
ダー成形により圧延してなる成形用塩化ビニルシート
は、圧延、プリント、絞り加工、ラミネートの各加工行
程において加熱して長さ方向に引っ張られる行程が繰り
返される為に必然的に長さ方向に延伸され、反対に幅方
向には殆ど延伸されないまま成形される。そして、上記
したように製造された成形用塩化ビニルシートは、真空
成形により自動車の内装材等として成形する際に再加熱
するとシートの長さ方向に熱収縮が生じると同時に、幅
方向に若干の熱膨張が生じる。よって、上記した成形用
塩化ビニルシートにあっては、真空成形の際にシートの
四方を固定して加熱したときにシートの長さ方向と幅方
向との間に熱収縮と熱膨張の差が生じて加熱したシート
が波打った状態になり、このしわが真空引きの際に生じ
るしわの発生原因となっていた。The vinyl chloride sheet for molding formed by rolling by calender molding as described above is heated in each process of rolling, printing, drawing, and laminating and is stretched in the longitudinal direction. Since it is repeated, it is inevitably stretched in the length direction, and on the contrary, it is molded with almost no stretching in the width direction. The vinyl chloride sheet for molding produced as described above is heat-shrinked in the length direction of the sheet when reheated when it is molded as an automobile interior material by vacuum forming, and at the same time, a little in the width direction. Thermal expansion occurs. Therefore, in the above-mentioned vinyl chloride sheet for molding, when the four sides of the sheet are fixed and heated during vacuum forming, there is a difference in thermal contraction and thermal expansion between the length direction and the width direction of the sheet. The resulting sheet became wavy in the heated sheet, and this wrinkle was a cause of wrinkling during vacuuming.
【０００４】本発明は成形用ビニルシートの製造過程に
おいて、シートの長さ方向と幅方向との間に生じる熱収
縮と熱膨張との差を減少させる行程を加えることによ
り、再加熱して成形する際におけるしわの発生を防止す
ることを課題とする。According to the present invention, during the process of producing a vinyl sheet for molding, a step of reducing the difference between thermal contraction and thermal expansion that occurs between the lengthwise direction and the widthwise direction of the sheet is added so that the sheet is reheated and molded. It is an object to prevent the generation of wrinkles when doing.
【０００５】[0005]
【課題を解決するための手段】以上の課題を解決する為
に本発明の成形用塩化ビニルシートの製造方法は、カレ
ンダー成形によって圧延したポリ塩化ビニルシートを加
熱して絞ロールにより模様を転写させ、その直後該シー
トが熱帯びた状態においてエキスパンダーロールにより
シートを幅方向に延伸させるものである。In order to solve the above problems, the method for producing a vinyl chloride sheet for molding of the present invention is to heat a polyvinyl chloride sheet rolled by calendar molding and transfer the pattern by a squeezing roll. Immediately after that, the sheet is stretched in the width direction by an expander roll in a tropical state.
【０００６】[0006]
【作用】以上の手段によれば、カレンダー成形によって
圧延したポリ塩化ビニルシートは、加熱された状態にお
いて長さ方向に引かれながら絞ロールにより模様の転写
が行われ、その直後、まだシートが熱帯びる状態におい
てエキスパンダーロールにより幅方向に延伸され、その
後自然冷却する。即ち、上記した行程にて製造された成
形用塩化ビニルシートは、カレンダー成形の際中に加わ
えられる張力により長さ方向に延伸されると共に、エク
スパンダーロールによる引き延ばしにより幅方向に延伸
された状態で成形され、上記エキスパンダーロールによ
る延伸により成形後においてシートを再加熱した際に生
じるシート幅方向の熱膨張が減少する。According to the above-mentioned means, the polyvinyl chloride sheet rolled by calendering is transferred to the pattern by the squeezing roll while being pulled in the lengthwise direction in the heated state, and immediately after that, the sheet is still heated. In the tinged state, it is stretched in the width direction by an expander roll and then naturally cooled. That is, the molding vinyl chloride sheet produced in the above process is stretched in the length direction by the tension applied during the calendar molding, and stretched in the width direction by the stretching by the expander roll. And the expansion by the expander roll reduces the thermal expansion in the sheet width direction that occurs when the sheet is reheated after being formed.
【０００７】[0007]
【発明の効果】本発明は以上説明したように、ポリ塩化
ビニルシートを加熱して絞ロールにより模様を転写した
直後、該シートが冷却される前にエキスパンダーロール
により幅方向に延伸させるものであるから、シートを再
加熱した際に生じるシート幅方向の膨張量を低減させ、
これにより再加熱時におけるしわの発生原因となってい
たシート長さ方向と幅方向との間に生じる熱収縮と熱膨
張との差を従来よりも減少させることができる。従っ
て、本願の製造行程により製造した塩化ビニルシートに
よれば、例えば真空成形の行程中に再加熱した際に生じ
ていたしわの発生が効果的に防止され、その成形性は大
幅に改善される。As described above, according to the present invention, a polyvinyl chloride sheet is stretched in the width direction by an expander roll immediately after heating and transferring the pattern by a squeezing roll before the sheet is cooled. Therefore, the amount of expansion in the sheet width direction that occurs when the sheet is reheated is reduced,
This makes it possible to reduce the difference between thermal contraction and thermal expansion between the sheet length direction and the sheet width direction, which is a cause of wrinkles during reheating, as compared with the conventional case. Therefore, according to the vinyl chloride sheet manufactured by the manufacturing process of the present application, for example, the generation of wrinkles caused when reheating during the vacuum molding process is effectively prevented, and the moldability thereof is significantly improved. .
【０００８】[0008]
【実施例】以下、本発明の製造方法を図面に基づいて説
明する。図中１は、カレンダー成形によって圧延したポ
リ塩化ビニルシート１ａを巻き取ったロールであり、上
記ポリ塩化ビニルシート１ａの表面には既にプリントが
施してある。上記したロール１から引き出されたシート
１ａは、１３０゜Ｃ程度に加熱したドラム２に通して予
備加熱した後、ヒーター３の設置区間を通過させて表面
温度が１８０゜Ｃ〜２００゜Ｃになるように加熱する。
加熱したシート１ａは絞ロール４と同ロール４に弾圧さ
れるゴムロール５との間を通して表面に絞り模様を転写
し、その直後、まだシート１ａの表面温度が１００゜Ｃ
〜１３０゜Ｃ程度の熱帯びた状態においてエキスパンダ
ーロール６にかける。エキスパンダーロール６は、図２
によって示すようにロールの周面を８枚〜１２枚程度の
スライド管６ａによって構成し、これらスライド管６ａ
の両半部をロールの回転に伴って各々両端方向へ水平移
動させることにより、該ロール６の外周に接触しながら
通過するシートに対して幅方向への引っ張り負荷を与え
るものである。従って、熱帯びた状態のポリ塩化ビニル
シート１ａが上記したエキスパンダロール６にかけられ
ると該シート１ａは幅方向に引っ張られて延伸される。
この際、エキスパンダロール６は駆動させておくことが
望ましい。エキスパンダーロール６を通過したシート１
ａは、ベルトコンベア７上に載せてできるだけ張力が加
わらない状態を保って移動させながら７０゜Ｃ〜８０゜
Ｃまでに自然冷却させた後、冷却ドラム８により常温ま
で強制冷却して巻き取りロール９にて巻き取る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The manufacturing method of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a roll in which the polyvinyl chloride sheet 1a rolled by calendering is wound up, and the surface of the polyvinyl chloride sheet 1a is already printed. The sheet 1a pulled out from the roll 1 is passed through the drum 2 heated to about 130 ° C to be preheated and then passed through the installation section of the heater 3 to have a surface temperature of 180 ° C to 200 ° C. To heat.
The heated sheet 1a is transferred between the squeezing roll 4 and the rubber roll 5 elastically pressed by the squeezing roll 4 to transfer the squeezing pattern to the surface, and immediately after that, the surface temperature of the sheet 1a is still 100 ° C.
Roll on the expander roll 6 in a tropical condition of about 130 ° C. The expander roll 6 is shown in FIG.
As shown by, the peripheral surface of the roll is composed of about 8 to 12 slide tubes 6a.
By horizontally moving both halves of the sheet in the direction of both ends as the roll rotates, a tensile load in the width direction is applied to the sheet passing while contacting the outer periphery of the roll 6. Therefore, when the tropical polyvinyl chloride sheet 1a is applied to the expander roll 6 described above, the sheet 1a is stretched by being pulled in the width direction.
At this time, it is desirable to drive the expander roll 6 in advance. Sheet 1 that passed the expander roll 6
A is placed on the belt conveyor 7 and allowed to naturally cool to 70 ° C. to 80 ° C. while being moved in a state where tension is not applied as much as possible. Wind up at 9.
【０００９】上記した行程にて製造された成形用塩化ビ
ニルシート１ａは、カレンダー成形や絞加工の際中に加
わえられる張力により長さ方向に延伸されると共に、エ
キスパンダーロール６による引き延ばしにより幅方向に
延伸された状態で成形される。従って、上記した成形用
塩化ビニルシート１ａを成形する為に再加熱した際にお
いて、シート１ａは長さ方向に熱収縮すると共に、幅方
向に熱膨張が生じるが、シート幅方向に生じる熱膨張は
エキスパンダーロール６により幅方向に延伸させた分減
少する。これにより再加熱時におけるしわの発生原因と
なっていたシート長さ方向と幅方向との間に生じる熱収
縮と熱膨張との差を従来よりも減少させることができ
る。例えば、従来の製造方法にて製造したポリ塩化ビニ
ルシートを実際に１００゜Ｃ〜１６０゜Ｃで再加熱した
場合には、シート長さ方向に０．５〜１５％の熱収縮
し、シート幅方向に０〜５％の範囲で熱膨張を生じてい
た。これに対し、本願の製造方法にて製造した成形用ポ
リ塩化ビニルシートにおいて、１００゜Ｃ〜１６０゜Ｃ
で再加熱した場合、シート長さ方向に０．５〜１５％の
熱収縮し、シート幅方向に−１〜３％の範囲で熱膨張す
る結果となり、再加熱時におけるしわの発生原因となっ
ていたシート長さ方向と幅方向との間に生じる熱収縮と
熱膨張との差を従来よりも減少させることができた。ま
た、上記した成形用ポリ塩化ビニルシート１ａの裏面に
発泡ポリプロピレンをラミネートする場合においては、
上記した製造行程の後に発泡ポリプロピレンを貼り合わ
せる行程が追加されるが、好ましくは、この貼り合わせ
行程直後におけるシートが熱帯びた状態において、上記
したエキスパンダーロールによりシート幅方向に延伸す
ることにより、発泡ポリプロピレンをラミネートした場
合においても良好なしわ防止効果と成形性の向上を図る
ことができる。The vinyl chloride sheet for molding 1a manufactured in the above process is stretched in the lengthwise direction by the tension applied during calendering and drawing, and is stretched by the expander roll 6 in the widthwise direction. It is molded in the stretched state. Therefore, when the above-mentioned vinyl chloride sheet for molding 1a is reheated for molding, the sheet 1a is thermally contracted in the length direction and thermally expanded in the width direction, but the thermal expansion caused in the sheet width direction is It is reduced by the amount stretched in the width direction by the expander roll 6. This makes it possible to reduce the difference between thermal contraction and thermal expansion between the sheet length direction and the sheet width direction, which is a cause of wrinkles during reheating, as compared with the conventional case. For example, when the polyvinyl chloride sheet manufactured by the conventional manufacturing method is actually reheated at 100 ° C to 160 ° C, the sheet shrinks by 0.5 to 15% in the sheet length direction and the sheet width. Thermal expansion occurred in the range of 0 to 5%. On the other hand, in the molding polyvinyl chloride sheet manufactured by the manufacturing method of the present application, 100 ° C to 160 ° C
When re-heated with, heat shrinkage of 0.5 to 15% in the sheet length direction and thermal expansion in the range of -1 to 3% in the sheet width direction are caused, which causes wrinkles during reheating. It was possible to reduce the difference between the thermal contraction and the thermal expansion that occurs between the length direction and the width direction of the sheet, which has been conventionally done. In addition, when laminating foamed polypropylene on the back surface of the above-mentioned molding polyvinyl chloride sheet 1a,
Although a step of laminating expanded polypropylene after the above-described manufacturing step is added, preferably, in a tropical state of the sheet immediately after the laminating step, by stretching in the sheet width direction by the expander roll described above, foaming is performed. Even when polypropylene is laminated, good wrinkle prevention effect and moldability can be improved.
【図１】 本願の製造行程を示す簡略図。FIG. 1 is a simplified diagram showing a manufacturing process of the present application.
【図２】 エキスパンダーロールを示す正面図。FIG. 2 is a front view showing an expander roll.
１ａ・・・ポリ塩化ビニルシート ４・・・絞ロール ６・・・エキスパンダーロール 1a ... Polyvinyl chloride sheet 4 ... Squeezing roll 6 ... Expander roll
Claims (1)
塩化ビニルシートを加熱して絞ロールにより模様を転写
させ、その直後該シートが熱帯びた状態においてエキス
パンダーロールによりシートを幅方向に延伸させること
を特徴とする成形用塩化ビニルシートの製造方法。1. A polyvinyl chloride sheet rolled by calendering is heated to transfer a pattern by a squeezing roll, and immediately after that, the sheet is stretched in the width direction by an expander roll in a tropical state. To produce a vinyl chloride sheet for molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3314879A JPH0722964B2 (en) | 1991-11-28 | 1991-11-28 | Method for producing vinyl chloride sheet for molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3314879A JPH0722964B2 (en) | 1991-11-28 | 1991-11-28 | Method for producing vinyl chloride sheet for molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05147103A JPH05147103A (en) | 1993-06-15 |
| JPH0722964B2 true JPH0722964B2 (en) | 1995-03-15 |
Family
ID=18058724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3314879A Expired - Fee Related JPH0722964B2 (en) | 1991-11-28 | 1991-11-28 | Method for producing vinyl chloride sheet for molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0722964B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112406085A (en) * | 2021-01-22 | 2021-02-26 | 潍坊群庆机械设备科技有限责任公司 | Embossing process for PVC leather of automobile interior trim |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5638233B2 (en) * | 2009-12-16 | 2014-12-10 | 株式会社ブリヂストン | Rubber sheet molding apparatus and molding method |
| JP2014205304A (en) * | 2013-04-12 | 2014-10-30 | 昭和電工株式会社 | Apparatus and method for manufacturing photocurable resin film |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2362393A1 (en) * | 1972-12-21 | 1974-06-27 | Horsens Teknisk Gummi As | EXPANDER ROLE |
| JPS56111627A (en) * | 1980-02-09 | 1981-09-03 | C I Kasei Co Ltd | Production of thermo-shrinkable matt film |
| JPH0722963B2 (en) * | 1986-08-13 | 1995-03-15 | 日産自動車株式会社 | Method for manufacturing resin sheet |
-
1991
- 1991-11-28 JP JP3314879A patent/JPH0722964B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 特公昭４４−２０８７７ |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112406085A (en) * | 2021-01-22 | 2021-02-26 | 潍坊群庆机械设备科技有限责任公司 | Embossing process for PVC leather of automobile interior trim |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05147103A (en) | 1993-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |