JP4059433B2 - Rubber processing apparatus and rubber processing method - Google Patents
Rubber processing apparatus and rubber processing method Download PDFInfo
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- JP4059433B2 JP4059433B2 JP2003002727A JP2003002727A JP4059433B2 JP 4059433 B2 JP4059433 B2 JP 4059433B2 JP 2003002727 A JP2003002727 A JP 2003002727A JP 2003002727 A JP2003002727 A JP 2003002727A JP 4059433 B2 JP4059433 B2 JP 4059433B2
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- rubber
- metal surface
- processing
- rubber processing
- processing apparatus
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- 238000010057 rubber processing Methods 0.000 title claims description 44
- 238000000034 method Methods 0.000 title claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 238000004898 kneading Methods 0.000 claims description 24
- 230000003746 surface roughness Effects 0.000 claims description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims 1
- 239000011651 chromium Substances 0.000 claims 1
- 238000010058 rubber compounding Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明はゴム加工装置およびゴム加工方法に関し、詳しくは、加工条件、特にはゴム練り加工や型付加工の条件を改良することにより、ゴム練り装置を初めとするゴム加工装置の金属表面に対するゴムの付着の防止を図った、歩留の良好なゴム加工装置およびゴム加工方法に関する。
【０００２】
【従来の技術】
一般に、ゴム物品の製造においては、素練りと混練という異なる２つの練り加工工程においてゴムの練り作業が行われ、その後、型付け加工、加硫等の工程を経て、型付加工品が得られる。かかるゴムの加工作業は、通常、各種ゴム配合に応じた温度で、練りロール機やバンバリーミキサー等の密閉式混合機、圧延ロールや各種押出機などを適宜用いて行われる。
【０００３】
ところが、このゴムの加工工程においては、練り加工時や型付加工時にゴムが部材の金属表面に付着してしまい、作業に支障を来す場合があった。この場合、付着したゴムの除去は作業者がその都度行わざるを得ないため、この金属表面へのゴムの付着は、ゴム物品の生産性を低下させる原因ともなっていた。
【０００４】
これに対し、例えば、特許文献１には、ゴム練り加工性を向上するために、ゴム配合中に所定の物性を有するワックスを添加して、優れた混練作業性と金型離型性とを兼ね備えたゴム組成物を得る技術が提案されている。しかし、このようなゴム配合の変更によりゴム−金属間の密着力の低減を図る技術では、ゴム配合が制限されることから汎用性に欠け、特定のゴム特性を有するゴム物品の製造にしか適用できないという難点があった。
【０００５】
【特許文献１】
特開平９−２０８７５１号公報（特許請求の範囲等）
【０００６】
【発明が解決しようとする課題】
そこで本発明の目的は、ゴムと金属との間の密着力を低減させて、金属表面に対するゴムの付着を防止することができ、これによりゴム練り加工や型付加工工程における問題の発生を防止して、ゴム配合の如何にかかわらず効率的なゴム物品の製造に寄与することのできるゴム加工装置およびゴム加工方法を提供することにある。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、本発明のゴム加工装置は、ゴムと接触する金属表面を有するゴム加工装置において、前記金属表面の表面粗度がＲａ＝２０〜５０μｍの範囲内であり、前記金属表面にクロムめっき処理が施されていることを特徴とするものである。
【０００８】
本発明のゴム加工装置においては、前記金属表面に梨地加工が施されていることが好ましい。本発明のゴム加工装置は、例えば、ゴム練り装置として好適に用いることができる。
【００１０】
また、本発明のゴム加工方法は、ゴムと接触する金属表面を有するゴム加工装置を用いてゴムの加工を行うゴム加工方法において、上記ゴム加工装置を用い、前記金属表面の温度を８０〜１５０℃の範囲内に保持して前記加工を行うことを特徴とするものである。
【００１２】
【発明の実施の形態】
以下、本発明の実施の形態につき詳細に説明する。
本発明は、ゴムと接触する金属表面を有するゴム加工装置を用いてゴムの加工を行う際の加工条件に係るものであり、特に、ゴムの加工工程におけるゴム練り加工および型付加工に好適に適用可能なゴム加工装置およびゴム加工方法に関する技術である。
【００１３】
具体的には、本発明のゴム加工装置においては、ゴムと接触する金属表面の表面粗度が、Ｒａ＝５〜５０μｍ、好ましくはＲａ＝２０〜５０μｍの範囲内である。ゴムの加工に際してゴムと接触する金属表面の表面粗度をこの範囲内とすることにより、ゴム−金属表面間の密着力を低減することができるため、ゴムの部材への付着、ひいてはこれに伴う問題の発生を防止して、ゴム練りや型付などのゴム加工時の作業性および生産性を向上することが可能となる。
【００１４】
かかる表面粗度を実現するためには、例えば、金属表面に粗面化処理を施す方法を用いることができ、特には、梨地加工を施すことにより上記表面粗度とすることが好ましい。また、金属表面にクロムめっき処理を施すことも好適であり、これによりゴムの付着をより良好に防止することが可能となる。
【００１５】
また、本発明のゴム加工方法においては、ゴムと接触する金属表面を有するゴム加工装置を用いてゴムの加工を行うに際し、かかる金属表面の温度を８０〜１５０℃の範囲内に保持して加工を行う。この場合にも、上記したと同様のゴム−金属表面間の密着力低減効果を得ることができ、ゴム加工時の作業性および生産性を向上することができる。
【００１６】
この場合、特には、上記本発明のゴム加工装置を用い、かつ、その金属表面を上記温度範囲内としてゴムの加工を行うことで、即ち、本発明に係る温度制御の技術および表面粗度調整の技術を組み合わせて用いることで、これらの相乗効果により、密着性低減効果をより高めることができる。これらのいずれかの技術を単独で用いても本発明の所期の効果は得られるが、双方の技術を併せて用いることにより、更に良好な効果を得ることが可能となる。
【００１７】
本発明においては、上記ゴム加工条件を満足するものであればよく、それ以外の点については特に制限されるものではない。例えば、本発明は、ゴム練り加工工程における素練りおよび混練のいずれの練り加工にも適用することができる。また、従来のゴム配合の改良に係る技術とは異なり、適用することのできるゴム配合にも制限はなく、いかなるゴム成分および配合材を含むものであってもよい。
【００１８】
また、本発明のゴム加工装置とは、ゴムと接触する金属表面を有する装置を意味するものであり、具体的には、練り加工に用いるゴム練り装置として、例えば、練りロール機やバンバリーミキサー、加圧ニーダー等を挙げることができ、型付加工に用いる型付加工装置として、圧延ロール、プレス、ローラーヘッド押出機のローラー等を挙げることができる。さらに、金属表面とは、これら装置中の、ゴム加工時にゴムと接触する金属部分、即ち、ゴムの付着が生じ得る部分を広く意味するものであって、本発明の適用領域は、ゴムの加工に際しゴムー金属間の付着の問題が発生し得るあらゆる場合を包含する。
【００１９】
本発明のゴム加工装置およびゴム加工方法をゴム物品の製造工程に適用することにより、従来生じていたゴムの加工工程における問題の発生がなくなるため、作業性および生産性を向上することができ、いかなるゴム配合であっても効率的にゴム物品を製造することが可能となる。
【００２０】
【実施例】
以下、本発明を実施例により具体的に説明する。
実験例１
所定の配合ゴムを用いて、梨地加工により表面粗度Ｒａを設定し、さらにクロムめっき処理を施した練りロールの金属表面との間の密着力につき、評価を行った。その結果を図１のグラフに示す。図中、表面粗度０μｍの点は、金属表面が鏡面状態である場合を示す。
【００２１】
実験例２
所定の配合ゴムを用いて、表面温度を夫々調整した練りロールの金属表面との間の密着力につき、評価を行った。その結果を図２のグラフに示す。
【００２２】
【発明の効果】
以上説明してきたように、本発明によれば、ゴムと金属との間の密着力を低減させて、金属表面に対するゴムの付着を防止することができるゴム加工装置およびゴム加工方法を実現することができ、これを用いることにより、ゴム物品の製造の際のゴムの加工工程における問題の発生を防止して、ゴム配合の如何にかかわらず効率的にゴム物品の製造を行うことが可能となる。
【図面の簡単な説明】
【図１】実験例１に係る、練りロールの金属表面の表面粗度とゴム−金属表面間の密着力との関係を示すグラフである。
【図２】実験例２に係る、練りロールの金属表面の表面温度とゴム−金属表面間の密着力との関係を示すグラフである。[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a rubber processing apparatus and a rubber processing method, and more particularly, by improving processing conditions, in particular, conditions of rubber kneading processing and mold processing, rubber against a metal surface of a rubber processing apparatus including a rubber kneading apparatus. TECHNICAL FIELD The present invention relates to a rubber processing apparatus and a rubber processing method with good yield, which are intended to prevent the adhesion of water.
[0002]
[Prior art]
In general, in the production of rubber articles, rubber kneading operations are performed in two different kneading processes, namely kneading and kneading, and then a die-molded article is obtained through steps such as mold forming and vulcanization. Such a rubber processing operation is usually performed at a temperature corresponding to various rubber blends using a closed mixer such as a kneading roll machine or a Banbury mixer, a rolling roll or various extruders as appropriate.
[0003]
However, in this rubber processing step, the rubber may adhere to the metal surface of the member during kneading or die forming, which may hinder the work. In this case, since the worker must remove the attached rubber each time, the adhesion of the rubber to the metal surface has been a cause of reducing the productivity of the rubber article.
[0004]
On the other hand, for example, in Patent Document 1, in order to improve rubber kneading processability, a wax having predetermined physical properties is added during rubber compounding to provide excellent kneading workability and mold releasability. A technique for obtaining a combined rubber composition has been proposed. However, the technology for reducing the adhesion between rubber and metal by changing the rubber compounding as described above is limited in rubber compounding and lacks versatility, and is only applicable to the production of rubber articles having specific rubber characteristics. There was a difficulty that was not possible.
[0005]
[Patent Document 1]
JP-A-9-208751 (Claims etc.)
[0006]
[Problems to be solved by the invention]
Therefore, the object of the present invention is to reduce the adhesion between the rubber and the metal and prevent the rubber from adhering to the metal surface, thereby preventing the occurrence of problems in the rubber kneading process and the die forming process. Then, it is providing the rubber processing apparatus and rubber processing method which can contribute to manufacture of an efficient rubber article irrespective of a rubber compounding.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the rubber processing apparatus of the present invention is a rubber processing apparatus having a metal surface in contact with rubber, wherein the surface roughness of the metal surface is within a range of Ra = 20 to 50 μm, The metal surface is subjected to chrome plating.
[0008]
In rubber processing apparatus of the present invention, it is not preferable to satin finish is applied to the metal surface. The rubber processing apparatus of this invention can be used suitably as a rubber kneading apparatus, for example.
[0010]
Also, rubber processing method of the present invention is a rubber processing method for performing processing of rubber with a rubber processing equipment having a metal surface in contact with the rubber, with the rubber processing equipment, the temperature of the
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
The present invention relates to processing conditions when processing rubber using a rubber processing apparatus having a metal surface that comes into contact with rubber, and is particularly suitable for rubber kneading processing and die forming processing in a rubber processing step. This is a technology related to an applicable rubber processing apparatus and rubber processing method.
[0013]
Specifically, in the rubber processing apparatus of the present invention, the surface roughness of the metal surface in contact with the rubber is Ra = 5 to 50 μm, preferably Ra = 20 to 50 μm. By making the surface roughness of the metal surface in contact with the rubber within this range when processing the rubber, the adhesion force between the rubber and the metal surface can be reduced. Occurrence of problems can be prevented, and workability and productivity during rubber processing such as rubber kneading and molding can be improved.
[0014]
In order to realize such surface roughness, for example, a method of roughening the metal surface can be used. In particular, it is preferable to achieve the surface roughness by performing a satin finish. Moreover, it is also suitable to perform a chrome plating process on the metal surface, thereby making it possible to better prevent the adhesion of rubber.
[0015]
In the rubber processing method of the present invention, when processing a rubber using a rubber processing apparatus having a metal surface in contact with the rubber, the temperature of the metal surface is maintained within a range of 80 to 150 ° C. I do. Also in this case, the same effect of reducing the adhesion force between the rubber and the metal surface as described above can be obtained, and workability and productivity during rubber processing can be improved.
[0016]
In this case, in particular, by using the rubber processing apparatus of the present invention and processing the rubber with the metal surface within the above temperature range, that is, the temperature control technique and surface roughness adjustment according to the present invention. By using these techniques in combination, the adhesiveness reduction effect can be further enhanced by these synergistic effects. Even if any one of these techniques is used alone, the desired effect of the present invention can be obtained. However, by using both the techniques in combination, it is possible to obtain a better effect.
[0017]
In the present invention, it is only necessary to satisfy the above rubber processing conditions, and other points are not particularly limited. For example, the present invention can be applied to both kneading and kneading processes in a rubber kneading process. Further, unlike the conventional technology related to the improvement of rubber compounding, there is no limitation on the rubber compounding that can be applied, and any rubber component and compounding material may be included.
[0018]
Further, the rubber processing device of the present invention means a device having a metal surface that comes into contact with rubber. Specifically, as a rubber kneading device used for kneading, for example, a kneading roll machine or a Banbury mixer, A pressure kneader can be used, and examples of the die processing apparatus used for the die forming process include a rolling roll, a press, and a roller of a roller head extruder. Further, the metal surface broadly means a metal part in these devices that comes into contact with the rubber during rubber processing, that is, a part where the rubber can be attached. In this case, all cases where problems of adhesion between rubber and metal may occur are included.
[0019]
By applying the rubber processing apparatus and the rubber processing method of the present invention to the manufacturing process of rubber articles, problems in the conventional rubber processing process are eliminated, so that workability and productivity can be improved. A rubber article can be efficiently produced by any rubber compounding.
[0020]
【Example】
Hereinafter, the present invention will be specifically described by way of examples.
Experimental example 1
Using a predetermined compounded rubber, the surface roughness Ra was set by a satin finish, and the adhesion between the kneaded roll and the metal surface of the kneaded roll was evaluated. The result is shown in the graph of FIG. In the figure, a point having a surface roughness of 0 μm indicates a case where the metal surface is in a mirror state.
[0021]
Experimental example 2
Using predetermined compounded rubber, the adhesion between the kneading roll and the metal surface of which the surface temperature was adjusted was evaluated. The result is shown in the graph of FIG.
[0022]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the adhesion between rubber and metal, and to realize a rubber processing apparatus and a rubber processing method that can prevent adhesion of rubber to the metal surface. By using this, it is possible to prevent the occurrence of problems in the rubber processing step during the manufacture of rubber articles, and to efficiently manufacture rubber articles regardless of the rubber compounding. .
[Brief description of the drawings]
1 is a graph showing the relationship between the surface roughness of a metal surface of a kneading roll and the adhesion between a rubber and a metal surface, according to Experimental Example 1. FIG.
2 is a graph showing the relationship between the surface temperature of the metal surface of the kneading roll and the adhesion between the rubber and the metal surface according to Experimental Example 2. FIG.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003002727A JP4059433B2 (en) | 2003-01-09 | 2003-01-09 | Rubber processing apparatus and rubber processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003002727A JP4059433B2 (en) | 2003-01-09 | 2003-01-09 | Rubber processing apparatus and rubber processing method |
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| Publication Number | Publication Date |
|---|---|
| JP2004209939A JP2004209939A (en) | 2004-07-29 |
| JP4059433B2 true JP4059433B2 (en) | 2008-03-12 |
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| JP2003002727A Expired - Fee Related JP4059433B2 (en) | 2003-01-09 | 2003-01-09 | Rubber processing apparatus and rubber processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104520084A (en) * | 2012-08-07 | 2015-04-15 | 株式会社神户制钢所 | Components in contact with rubber materials |
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| JP4836484B2 (en) * | 2005-04-22 | 2011-12-14 | 株式会社ブリヂストン | Split mold, surface treatment method and molded product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104520084A (en) * | 2012-08-07 | 2015-04-15 | 株式会社神户制钢所 | Components in contact with rubber materials |
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