JP2005125523A - Rubber sheet manufacturing method - Google Patents

Rubber sheet manufacturing method Download PDF

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JP2005125523A
JP2005125523A JP2003361074A JP2003361074A JP2005125523A JP 2005125523 A JP2005125523 A JP 2005125523A JP 2003361074 A JP2003361074 A JP 2003361074A JP 2003361074 A JP2003361074 A JP 2003361074A JP 2005125523 A JP2005125523 A JP 2005125523A
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sheet
rubber sheet
rolled
rubber
thickness
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JP4368654B2 (en
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Masaaki Mori
正明 毛利
Atsuhiro Sumii
敦弘 住井
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Inoac Corp
Inoac Elastomer Co Ltd
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Inoue MTP KK
Inoac Corp
Inoac Elastomer Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber sheet manufacturing method capable of simplifying a manufacturing apparatus to reduce an equipment investment cost, capable of easily corresponding to the thickness setting alteration of the rubber sheet and adaptable to small lot multikind production. <P>SOLUTION: A rubber material 11 is placed on a carrier sheet 12 and rolled between a plurality of calender rolls 13 to form a rolled sheet 14 having a predetermined thickness. After the rolled sheet 14 is cut into a predetermined size if necessary, each of the cut sheets is vulcanized between a pair of templates 17 and 18 to form a thin-walled rubber sheet 19. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、ゴムシートの製造方法に係り、特に厚さが１０００μｍ以下の薄肉ゴムシートの製造に適した製造方法に関するものである。   The present invention relates to a method for manufacturing a rubber sheet, and more particularly to a manufacturing method suitable for manufacturing a thin rubber sheet having a thickness of 1000 μm or less.

従来、この種の薄肉ゴムシートの製造においては、例えば図２及び図３に示すような方法が実施されていた。
すなわち、図２に示す製造方法では、ゴム材料２１をキャリアシート２２上に載せた状態で、複数のカレンダーロール２３間で圧延して、所定厚さの圧延シート２４を形成している。その後、圧延シート２４をキャリアシート２２とともに、複数の加熱ローラ２５上に周回させて連続加熱することにより、薄肉ゴムシート２６に対して加硫を施している。 Conventionally, in manufacturing such a thin rubber sheet, for example, a method as shown in FIGS. 2 and 3 has been performed.
That is, in the manufacturing method shown in FIG. 2, a rolled sheet 24 having a predetermined thickness is formed by rolling between a plurality of calendar rolls 23 with the rubber material 21 placed on the carrier sheet 22. Thereafter, the rolled sheet 24 is circulated on the plurality of heating rollers 25 together with the carrier sheet 22 and continuously heated, whereby the thin rubber sheet 26 is vulcanized.

また、図３に示す製造方法では、ゴム材料２７を成形金型２８，２９間のキャビティ内において高圧で成形するとともに、そのキャビティ内で加硫して、薄肉ゴムシート２６を形成している。   In the manufacturing method shown in FIG. 3, the rubber material 27 is molded at a high pressure in the cavity between the molding dies 28 and 29 and vulcanized in the cavity to form the thin rubber sheet 26.

ところが、これらの従来の製造方法においては、次のような問題があった。
図２の製造方法では、製造のための装置に複数の大径の加熱ローラ２５を備える必要があるため、同装置が大掛かりで、広い設置スペースを必要とするものであった。また、カレンダーロール２３間の間隔を変更して、薄肉ゴムシート２６の厚さを設定変更する場合、複数の加硫ローラ２５上に周回している圧延シート２４は加硫途中である。このため、その圧延シート２４を回収して、ゴム材料２１として再利用することができず、大量の材料ロスが発生した。そして、このように薄肉ゴムシート２６の厚さの設定変更ごとに、大量の材料ロスが発生するため、多品種生産には不向きであった。 However, these conventional manufacturing methods have the following problems.
In the manufacturing method of FIG. 2, since it is necessary to provide a plurality of large-diameter heating rollers 25 in the manufacturing apparatus, the apparatus is large and requires a large installation space. When the interval between the calendar rolls 23 is changed to change the thickness of the thin rubber sheet 26, the rolled sheet 24 that circulates on the plurality of vulcanizing rollers 25 is in the middle of vulcanization. For this reason, the rolled sheet 24 could not be recovered and reused as the rubber material 21, and a large amount of material loss occurred. Since each time the thickness of the thin rubber sheet 26 is changed, a large amount of material loss occurs, which is not suitable for multi-product production.

一方、図３の製造方法では、薄肉のものを型内に射出成形するのはきわめて困難であるため、あらかじめシート状のものを別工程で予備成形しておく必要があり、それをさらに成形するため、製造に手間がかかるものであった。しかも、薄肉ゴムシート２６の厚さ精度を確保するために、成形金型２８，２９として高い寸法精度が要求されるので、装置が高価になった。また、薄肉ゴムシート２６の厚さを設定変更する場合、その変更厚さごとに異なった種類の成形金型２８，２９を必要とするため、厚さの設定変更に費用がかかって、図２の装置と同様に多品種生産には不向きであった。   On the other hand, in the manufacturing method of FIG. 3, since it is very difficult to injection-mold a thin-walled material in a mold, it is necessary to preform a sheet-shaped material in a separate process in advance, and further mold it Therefore, it takes a lot of time to manufacture. In addition, in order to ensure the thickness accuracy of the thin rubber sheet 26, high dimensional accuracy is required for the molding dies 28 and 29, so that the apparatus becomes expensive. In addition, when the setting of the thickness of the thin rubber sheet 26 is changed, different types of molding dies 28 and 29 are required for each changed thickness. Like the other equipment, it was not suitable for multi-product production.

この発明は、このような従来の技術に存在する問題点に着目してなされたものである。その目的は、製造装置を簡略化することができて、設備費用を低減することができるとともに、ゴムシートの厚さの設定変更に容易に対応することができて、少ロット多品種生産に適用することができるゴムシートの製造方法を提供することにある。   The present invention has been made paying attention to such problems existing in the prior art. Its purpose is to simplify the manufacturing equipment, reduce equipment costs, and can easily respond to changes in the rubber sheet thickness settings, so it can be applied to small-lot, multi-product production. Another object of the present invention is to provide a method for producing a rubber sheet.

上記の目的を達成するために、請求項１に記載のゴムシートの製造方法の発明は、ゴム材料をキャリアシートに載せて、複数のカレンダーロール間で所定の厚さに圧延し、その圧延シートを一対の熱板間における所定圧力下で加圧・加熱して加硫することにより、ゴムシートを製造する方法であって、前記熱板の前記圧延シートに当接する側が平面のみで構成され、前記圧延シートが前記熱板間で加圧された際に受ける圧力とその圧力に対する反力とが釣り合うことで、前記熱板間が所定の距離に維持されて、所定の厚さのゴムシートが形成されることを特徴とする。   In order to achieve the above object, the invention of the rubber sheet manufacturing method according to claim 1 is characterized in that a rubber material is placed on a carrier sheet and rolled to a predetermined thickness between a plurality of calender rolls. Is a method of manufacturing a rubber sheet by pressurizing and heating under a predetermined pressure between a pair of hot plates, and the side of the hot plate contacting the rolled sheet is composed of only a plane, By balancing the pressure received when the rolled sheet is pressed between the hot plates and the reaction force against the pressure, the hot plate is maintained at a predetermined distance, and a rubber sheet having a predetermined thickness is obtained. It is formed.

請求項２に記載の発明は、請求項１に記載の発明において、前記圧延シートを所定の大きさに裁断した後に加硫することを特徴とする。
請求項３に記載の発明は、請求項１または２に記載の発明において、前記ゴムシートの所定の厚さが、５０〜１０００μｍの間にあることを特徴とする。 The invention according to claim 2 is characterized in that, in the invention according to claim 1, the rolled sheet is cut into a predetermined size and then vulcanized.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the predetermined thickness of the rubber sheet is between 50 and 1000 μm.

請求項４に記載の発明は、請求項１または２に記載のゴムシートの製造方法において、前記ゴムシートの所定の厚さが、５０〜５００μｍの間にあることを特徴とする。
（作用）
この発明においては、ゴムシートは、カレンダーロールにより圧延され、その圧延後に熱板間で加硫が行われて製造されるため、従来の製造方法とは異なり、大掛かりな加硫ローラや高精度の成形金型を必要としない。加えて、熱板がその圧力とそれに対する反力との釣り合いにより所定間隔に維持されるため、圧延シートの厚みが維持される。このため、ゴムシートの厚みを変更するためには、カレンダーロール間の間隔を変更するのみでよく、その変更がきわめて容易である。しかも、熱板間の間隔を維持するための機構が不要であるため、熱板を有する成形装置の構成が簡単になる。さらに、ゴムシートの厚さを設定変更する場合には、未加硫の圧延シートを回収して、ゴム材料として再利用することができる。よって、ゴムシートの厚さの設定変更を度々行う必要がある少ロット多品種生産においても、大量の材料ロスを発生することなく、容易に対応することができる。 According to a fourth aspect of the present invention, in the rubber sheet manufacturing method according to the first or second aspect, the predetermined thickness of the rubber sheet is between 50 and 500 μm.
(Function)
In the present invention, the rubber sheet is rolled by a calender roll and is vulcanized between hot plates after the rolling, so unlike a conventional manufacturing method, a large vulcanizing roller or a high-precision vulcanizing roller is used. Does not require a mold. In addition, since the hot plate is maintained at a predetermined interval by the balance between the pressure and the reaction force thereto, the thickness of the rolled sheet is maintained. For this reason, in order to change the thickness of the rubber sheet, it is only necessary to change the interval between the calendar rolls, and the change is extremely easy. And since the mechanism for maintaining the space | interval between hot plates is unnecessary, the structure of the shaping | molding apparatus which has a hot plate becomes easy. Furthermore, when changing the thickness of the rubber sheet, the unvulcanized rolled sheet can be collected and reused as a rubber material. Therefore, even in small lot multi-product production where it is necessary to frequently change the setting of the thickness of the rubber sheet, it can be easily handled without causing a large amount of material loss.

以上のように、この発明によれば、製造装置を簡略化することができて、設備投資費を低減することができる。また、大量の材料ロスを発生することなく、ゴムシートの厚さを容易に設定変更することができて、少ロット多品種生産に適用することができる。   As described above, according to the present invention, the manufacturing apparatus can be simplified and the capital investment cost can be reduced. In addition, the thickness of the rubber sheet can be easily set and changed without generating a large amount of material loss, and can be applied to small-lot, multi-product production.

以下、この発明を具体化したゴムシートの製造方法の実施形態を、図１に基づいて説明する。
さて、この実施形態に使用される製造装置においては、ゴム材料１１をＰＥＴ（ポリエチレン・テレフタレート樹脂）等よりなるキャリアシート１２上に載せた状態で、圧延装置を構成する複数（実施形態では３本）のカレンダーロール１３間で順に圧延して、所定厚さの圧延シート１４を形成している。この場合、対向配置されたカレンダーロール１３間の間隔を調節することにより、圧延シート１４の厚さを設定変更することができる。そして、この圧延シート１４をキャリアシート１２とともに、コンベア１５で搬送した後、カッタ１６により裁断して、所定の大きさ及び形状（四角形）の未加硫の圧延シート１４ａとする。なお、前記キャリアシート１２の厚さは７５〜１５０μｍ程度である。 Hereinafter, an embodiment of a rubber sheet manufacturing method embodying the present invention will be described with reference to FIG.
In the manufacturing apparatus used in this embodiment, a plurality of (three in the embodiment) constituting the rolling apparatus in a state where the rubber material 11 is placed on a carrier sheet 12 made of PET (polyethylene terephthalate resin) or the like. ) In order to form a rolled sheet 14 having a predetermined thickness. In this case, the thickness of the rolled sheet 14 can be set and changed by adjusting the interval between the calendar rolls 13 arranged to face each other. And after conveying this rolled sheet 14 with the carrier sheet 12 with the conveyor 15, it cuts with the cutter 16, and is set as the unvulcanized rolled sheet 14a of a predetermined | prescribed magnitude | size and shape (square). The carrier sheet 12 has a thickness of about 75 to 150 μm.

続いて、この未加硫の圧延シート１４ａをキャリアシート１２とともに、一対の熱板としての型板１７，１８間に挟圧させる。このとき、この型板１７，１８を通常のゴムの加硫温度である１２０℃以上に加熱して、面圧３００〜１２００Ｎ／ｃｍ２の所定圧力で圧延シート１４ａ及びキャリアシート１２に上下から密着させて、加圧・加熱させる。この型板１７，１８は、圧延シート１４ａ及びキャリアシート１２に当接する側が平面のみで構成されている。そして、圧延シート１４ａが型板１７，１８により加圧・加熱されたとき、圧延シート１４ａが前記型板１７，１８間で受ける圧力とその圧力に対する圧延シート１４ａの弾性反発力等の反力とが釣り合うことで、前記型板１７，１８間が所定の距離に維持される。そして、この状態で、薄肉ゴムシート１９が前記の所定の圧力下で加硫成形される。この加硫成形においては、前記のような面圧荷重を圧延シート１４ａに作用させても、シート１４ａの表面が平滑になるとともに、加硫が実行されるが、その厚さはほとんど変化しない。 Subsequently, the unvulcanized rolled sheet 14a is pressed together with the carrier sheet 12 between the mold plates 17 and 18 as a pair of hot plates. At this time, the mold plates 17 and 18 are heated to 120 ° C. or higher, which is a normal rubber vulcanization temperature, and are closely attached to the rolled sheet 14a and the carrier sheet 12 from above and below at a predetermined pressure of 300 to 1200 N / cm 2. And pressurize and heat. The template plates 17 and 18 are configured such that the side in contact with the rolled sheet 14a and the carrier sheet 12 is a flat surface. When the rolled sheet 14a is pressed and heated by the mold plates 17 and 18, the pressure received by the rolled sheet 14a between the mold plates 17 and 18 and the reaction force such as the elastic repulsive force of the rolled sheet 14a against the pressure, Is maintained at a predetermined distance between the template plates 17 and 18. In this state, the thin rubber sheet 19 is vulcanized and molded under the predetermined pressure. In this vulcanization molding, even if a surface pressure load as described above is applied to the rolled sheet 14a, the surface of the sheet 14a becomes smooth and vulcanization is performed, but the thickness thereof hardly changes.

以上の工程により、厚さが５０〜１０００μｍ、多くは５０〜５００μｍで、厚み精度が±１５％以下の薄肉ゴムシート１９を形成することができる。ちなみに、前記型板１７，１８による加硫時において、面圧が３００Ｎ／ｃｍ２よりも低くなると、ゴムの加硫が不十分となり、面圧が１２００Ｎ／ｃｍ２よりも高くなると、ゴムが圧力で流動して、薄肉ゴムシート１９の厚さ精度が低下する。また、薄肉ゴムシート１９の厚さを１０００μｍよりも大きく設定した場合には、ゴムの流動が生じやすくなって、厚さ精度が著しく低下する。 Through the above steps, a thin rubber sheet 19 having a thickness of 50 to 1000 μm, most of which is 50 to 500 μm, and a thickness accuracy of ± 15% or less can be formed. Incidentally, when the surface pressure is lower than 300 N / cm 2 during vulcanization by the mold plates 17 and 18, the rubber is insufficiently vulcanized, and when the surface pressure is higher than 1200 N / cm 2 , the rubber is pressurized. The thickness accuracy of the thin rubber sheet 19 decreases. Further, when the thickness of the thin rubber sheet 19 is set to be larger than 1000 μm, the rubber tends to flow and the thickness accuracy is remarkably lowered.

以上のように、この実施形態では、カレンダーロール１３によりゴム材料１１から未加硫の圧延シート１４を形成して、カッタ１６により所定の大きさに切断した後、その切断後の圧延シート１４ａを所定の相互間隔に維持される型板１７，１８間で加硫して、薄肉ゴムシート１９を製造している。このため、薄肉ゴムシート１９の厚さを設定変更する場合には、対向配置されたカレンダーロール１３間の間隔を変更調節するとともに、一対の型板１７，１８の加硫間隔を変更調節すればよい。よって、図２に示すような大掛かりな加硫装置は不要で、装置全体を簡素かつ小型化することができる。しかも、図３に示す従来技術とは異なり、成形金型をゴムシートの厚さに適合するものと交換する等の面倒な作業を必要とせず、装置の段取り替えを容易に行うことができる。このため、薄肉ゴムシート１９の厚さの設定変更を度々行う必要がある少ロット多品種生産に適用した場合でも、大量の材料ロスを発生することなく、容易に対応することができる。   As described above, in this embodiment, the unvulcanized rolled sheet 14 is formed from the rubber material 11 by the calender roll 13, cut into a predetermined size by the cutter 16, and then the cut rolled sheet 14a is cut. A thin rubber sheet 19 is manufactured by vulcanization between mold plates 17 and 18 maintained at a predetermined mutual interval. For this reason, when changing the setting of the thickness of the thin rubber sheet 19, the distance between the calendar rolls 13 arranged to face each other is changed and adjusted, and the vulcanization interval between the pair of template plates 17 and 18 is changed and adjusted. Good. Therefore, a large-scale vulcanizing apparatus as shown in FIG. 2 is unnecessary, and the entire apparatus can be simplified and downsized. Moreover, unlike the prior art shown in FIG. 3, it is possible to easily change the setup of the apparatus without the need for troublesome work such as exchanging the molding die with one that matches the thickness of the rubber sheet. For this reason, even when the present invention is applied to small lot multi-product production where it is necessary to frequently change the thickness of the thin rubber sheet 19, it can be easily handled without causing a large amount of material loss.

また、この薄肉ゴムシート１９の厚さの設定変更時には、カレンダーロール１３にて圧延された状態にある未加硫の圧延シート１４、１４ａを回収して、ゴム材料１１として再び使用することができる。よって、図２に示す従来技術とは異なり、大量の材料ロスが発生することがなく、材料の有効利用を図ることができる。   Further, when changing the setting of the thickness of the thin rubber sheet 19, the unvulcanized rolled sheets 14 and 14 a that have been rolled by the calendar roll 13 can be recovered and used again as the rubber material 11. . Therefore, unlike the prior art shown in FIG. 2, a large amount of material loss does not occur and the material can be effectively used.

加えて、一対の型板１７，１８間における成形においては、型板１７，１８がその圧力とそれに対する反力との釣り合いにより所定間隔に維持されるため、圧延シート１４ａの厚みがほとんど変化しない。従って、カレンダーロール１３間における圧延シート１４ａの厚みが維持されるため、薄肉ゴムシート１９の厚みを変更するためには、カレンダーロール１３間の間隔を変更するのみでよく、その変更がきわめて容易である。しかも、型板１７，１８間の間隔を維持するための機構が不要であるため、成形装置の構成が簡単になる。   In addition, in the molding between the pair of mold plates 17 and 18, since the mold plates 17 and 18 are maintained at a predetermined interval by the balance between the pressure and the reaction force thereto, the thickness of the rolled sheet 14a hardly changes. . Therefore, since the thickness of the rolled sheet 14a between the calendar rolls 13 is maintained, in order to change the thickness of the thin rubber sheet 19, it is only necessary to change the interval between the calendar rolls 13, and the change is very easy. is there. In addition, since a mechanism for maintaining the distance between the template plates 17 and 18 is unnecessary, the configuration of the molding apparatus is simplified.

（変更例）
なお、この実施形態は、次のように変更して具体化することも可能である。
・ 前記実施形態においては、カレンダーロール１３間で圧延した圧延シート１４をカッタ１６により所定の大きさに切断した後、型板１７，１８間にて加硫しているが、圧延シート１４を切断することなく、所定量ずつ型板１７，１８間に間欠的に移送して、加硫するようにしてもよい。 (Example of change)
In addition, this embodiment can also be changed and embodied as follows.
In the above embodiment, the rolled sheet 14 rolled between the calender rolls 13 is cut into a predetermined size by the cutter 16 and then vulcanized between the template plates 17 and 18, but the rolled sheet 14 is cut. Instead, a predetermined amount may be intermittently transferred between the mold plates 17 and 18 and vulcanized.

・ 前記実施形態においては、３本のカレンダーロール１３によりゴム材料を所定の厚さに圧延しているが、２本あるいは４本以上の複数本のカレンダーロール１３を使用して圧延するようにしてもよい。   In the above embodiment, the rubber material is rolled to a predetermined thickness by the three calender rolls 13, but the calender material is rolled by using two or four or more calender rolls 13. Also good.

・ 前記実施形態においては、キャリアシート１２を圧延シート１４の片面に接合させているが、これを圧延シート１４の両面に接合させるようにしてもよい。   In the embodiment, the carrier sheet 12 is bonded to one side of the rolled sheet 14, but it may be bonded to both sides of the rolled sheet 14.

ゴムシートの製造装置を示す断面図。Sectional drawing which shows the manufacturing apparatus of a rubber sheet. 従来のゴムシートの製造装置を示す断面図。Sectional drawing which shows the manufacturing apparatus of the conventional rubber sheet. 従来のゴムシートの製造装置の別の構成を示す断面図。Sectional drawing which shows another structure of the manufacturing apparatus of the conventional rubber sheet.

符号の説明Explanation of symbols

１１…ゴム材料、１２…キャリアシート、１３…カレンダーロール、１４，１４ａ…圧延シート、１６…カッタ、１７，１８…熱板としての型板、１９…薄肉ゴムシート。   DESCRIPTION OF SYMBOLS 11 ... Rubber material, 12 ... Carrier sheet, 13 ... Calendar roll, 14, 14a ... Rolled sheet, 16 ... Cutter, 17, 18 ... Template as a hot plate, 19 ... Thin rubber sheet.

Claims (4)

ゴム材料をキャリアシートに載せて、複数のカレンダーロール間で所定の厚さに圧延し、その圧延シートを一対の熱板間における所定圧力下で加圧・加熱して加硫することにより、ゴムシートを製造する方法であって、
前記熱板の前記圧延シートに当接する側が平面のみで構成され、前記圧延シートが前記熱板間で加圧された際に受ける圧力とその圧力に対する反力とが釣り合うことで、前記熱板間が所定の距離に維持されて、所定の厚さのゴムシートが形成されることを特徴とするゴムシートの製造方法。 A rubber material is placed on a carrier sheet, rolled to a predetermined thickness between a plurality of calender rolls, and the rolled sheet is vulcanized by pressing and heating under a predetermined pressure between a pair of hot plates. A method of manufacturing a sheet,
The side of the hot plate that contacts the rolled sheet is composed of only a flat surface, and the pressure received when the rolled sheet is pressed between the hot plates is balanced with the reaction force against the pressure. Is maintained at a predetermined distance, and a rubber sheet having a predetermined thickness is formed. 前記圧延シートを所定の大きさに裁断した後に加硫することを特徴とする請求項１に記載のゴムシートの製造方法。 The method for producing a rubber sheet according to claim 1, wherein the rolled sheet is vulcanized after being cut into a predetermined size. 前記ゴムシートの所定の厚さが、５０〜１０００μｍの間にあることを特徴とする請求項１または２に記載のゴムシートの製造方法。 The method for producing a rubber sheet according to claim 1 or 2, wherein the predetermined thickness of the rubber sheet is between 50 and 1000 µm. 前記ゴムシートの所定の厚さが、５０〜５００μｍの間にあることを特徴とする請求項１または２に記載のゴムシートの製造方法。 The method for producing a rubber sheet according to claim 1 or 2, wherein the predetermined thickness of the rubber sheet is between 50 and 500 µm.
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