JP4565989B2 - Production method of finely crushed rubber - Google Patents

Production method of finely crushed rubber Download PDF

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JP4565989B2
JP4565989B2 JP2004368816A JP2004368816A JP4565989B2 JP 4565989 B2 JP4565989 B2 JP 4565989B2 JP 2004368816 A JP2004368816 A JP 2004368816A JP 2004368816 A JP2004368816 A JP 2004368816A JP 4565989 B2 JP4565989 B2 JP 4565989B2
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pulverization
rubber
roll
rolls
fine
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JP2006176560A (en
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英治 矢野
哲也 冨安
秀雄 國奥
博樹 徳井
晴乙 池田
秀樹 秋元
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Bridgestone Corp
Kotobuki Sangyo Co Ltd
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Kotobuki Sangyo Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
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    • Y02W30/62—Plastics recycling; Rubber recycling

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  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
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  • Crushing And Pulverization Processes (AREA)
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Description

本発明は、廃タイヤ、廃棄された各種工業用ゴム製品などの不要なゴムを微粉末ゴムにするための微粉砕ゴムの製法に関するものである。   The present invention relates to a method for producing finely pulverized rubber for making unnecessary rubber such as waste tires and discarded industrial rubber products into fine powder rubber.

例えば廃タイヤ（古タイヤ）などから分離したゴム材料を再生するために粉末処理することが行われている。廃タイヤを破砕・粉砕して生じたゴム片を粒状・粉状にしたものを総称して「ゴム粉」と言われており、このゴム粉は一般的に粒子径が０．３〜５ｍｍ程度のものがマテリアルリサイクルとして使用されている。
従来のゴムの微粉砕製法として、特開平６−１７９２１５号公報、特開平７−３１４４４７号公報及び特開平１０−１２８７５２号公報にそれぞれ記載のもの（以下それぞれ「従来例１」、「従来例２」及び「従来例３」という。）が提案されており、これらの方法は次のとおりである。
従来例１は加硫ゴム系材料の微粉化方法に関するものである。これは、公報第３頁段落００１４〜第５頁段落００２６に記載されているように、実施例１によれば、まずタイヤの廃材を粉砕機を用いて約２０ｍｍ粒径に粗粉砕し、ついで得られた粗粉末をスクリュー径Ｄが３０ｍｍ、スクリュー長さＬに対するスクリュー径Ｄの比Ｌ／Ｄが２４である二軸押出機のホッパーに投入し、投入後にスクリューの回転数を１００ｒｐｍとし、シリンダを４分割したそれぞれの領域１〜４に下記のような温度設定をし、シリンダ内に送り込み、押出機内でせん断力を付与して平均粒径１０〜７０μｍ（０．０１〜０．０７ｍｍ）である微粉末を得るものである。
領域１：１３０°Ｃ
領域２：１５０°Ｃ
領域３：１７０°Ｃ
領域４：１７０°Ｃ
従来例２は、３００μｍ（０．３ｍｍ）以下の粒径から構成される加硫ゴムを微粉化する方法に関するものであり、この方法は、媒体式粉砕機を使用して加硫ゴムを微粉化する過程では壁温を１６０°Ｃ以上（好ましくは１８０°Ｃ以上）加熱してゴム粉を得るものである。
従来例３は、使用済みのタイヤゴムを微粉砕する方法に関するものであり、この方法はその実施例１によれば（公報第４頁第６欄段落００２６参照）、液体窒素を冷媒に使用して、タイヤゴムを冷凍粉砕して、ふるい目１００μｍを通過させて、粉砕粉末ゴムの粒径分布に於ける１００μｍ以下の割合が、９５．８％の粉砕粉末ゴムを得るようにしたものである。
特開平６−１７９２１５号公報 特開平７−３１４４４７号公報 特開平１０−１２８７５２号公報 For example, powder processing is performed to regenerate a rubber material separated from waste tires (old tires). The rubber pieces produced by crushing and crushing waste tires in the form of granules and powders are collectively referred to as "rubber powder", and this rubber powder generally has a particle size of about 0.3 to 5 mm. Are used as material recycling.
Conventional rubber pulverization methods are those described in JP-A-6-179215, JP-A-7-314447 and JP-A-10-128752, respectively (hereinafter referred to as “conventional example 1” and “conventional example 2”, respectively). And “Conventional Example 3”) have been proposed, and these methods are as follows.
Conventional Example 1 relates to a method for pulverizing a vulcanized rubber material. According to Example 1, as described in the publication, page 3, paragraph 0014 to page 5, paragraph 0026, according to Example 1, the waste material of the tire is first roughly pulverized to a particle size of about 20 mm using a pulverizer. The obtained coarse powder was charged into a hopper of a twin screw extruder having a screw diameter D of 30 mm and a ratio L / D of the screw diameter D to the screw length L of 24. The following temperature settings are made for each of the regions 1 to 4 divided into four parts, fed into the cylinder, and a shear force is applied in the extruder to give an average particle size of 10 to 70 μm (0.01 to 0.07 mm). A fine powder is obtained.
Region 1: 130 ° C
Region 2: 150 ° C
Region 3: 170 ° C
Region 4: 170 ° C
Conventional Example 2 relates to a method of pulverizing vulcanized rubber having a particle size of 300 μm (0.3 mm) or less, and this method pulverizes vulcanized rubber using a medium pulverizer. In this process, the wall temperature is heated to 160 ° C. or higher (preferably 180 ° C. or higher) to obtain rubber powder.
Conventional Example 3 relates to a method of pulverizing used tire rubber, and according to Example 1 (see the publication, page 4, column 6, paragraph 0026), liquid nitrogen is used as a refrigerant. The tire rubber is freeze pulverized and passed through a sieve having a size of 100 μm to obtain a pulverized powder rubber having a ratio of 100 μm or less in the particle size distribution of the pulverized powder rubber of 95.8%.
JP-A-6-179215 JP 7-314447 A Japanese Patent Laid-Open No. 10-128752

従来例１では、得られるゴム粉末の平均粒径１０〜７０μｍ（０．０１〜０．０７ｍｍ）の微粉末であるから、ゴムの再利用を図る観点から望ましいものであるが、押出機のシリンダを４分割したそれぞれの領域において２４０°Ｃ以下の加熱温度を設定する必要があり、温度管理が容易ではなく、作業効率の低下を招く課題があった。
従来例２による方法も、媒体式粉砕機の壁温を１６０°Ｃ以上とする加熱粉砕であり、また従来例３も冷凍粉砕による方法であるから、いずれも従来例１と同様の課題がある。
本発明の目的は、作業効率の低下を招くことなく作業がし易い微粉砕ゴムの製法を提供することにある。 In Conventional Example 1, since the obtained rubber powder is a fine powder having an average particle size of 10 to 70 μm (0.01 to 0.07 mm), it is desirable from the viewpoint of reusing the rubber. It is necessary to set a heating temperature of 240 ° C. or lower in each of the four regions divided into four, and temperature management is not easy, and there is a problem in that work efficiency is reduced.
The method according to Conventional Example 2 is also a heat pulverization in which the wall temperature of the medium-type pulverizer is 160 ° C. or higher, and since Conventional Example 3 is also a method by freeze pulverization, both have the same problems as in Conventional Example 1. .
An object of the present invention is to provide a method for producing finely pulverized rubber that is easy to work without causing a reduction in working efficiency.

本発明の第１の特徴は、不要なゴムからチップ状に処理されたゴム原材料を微粉砕手段によって固着防止剤を添加しながら荒粉砕、中粉砕及び仕上げ粉砕によって荒粉砕ゴムから中粉砕ゴムを経て微粉砕ゴムに順次仕上げて行く微粉砕工程と、上記微粉砕ゴムを分級して少なくともその一部を微粉末ゴム製品として回収する分級回収工程とを具備していることにある。
本発明の第２の特徴は、上記第１の特徴を前提とし、かつ微粉砕工程では、微粉砕手段として対の荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールを配置しているロール粉砕手段を用いて、各段階における対の粉砕ロール間で荒粉砕・中粉砕・仕上げ粉砕することにある。
本発明の第３の特徴は、上記第１の特徴を前提とし、かつ微粉砕工程では、微粉砕手段として対の荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールを配置しかつ上記各粉砕ロールはその外周面が凹凸面に形成されているロール粉砕手段を用いて、各段階における対の粉砕ロール間で荒粉砕・中粉砕・仕上げ粉砕することにある。
本発明の第４の特徴は、上記第１の特徴を前提とし、かつ微粉砕工程では、微粉砕手段として対の荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールを配置しかつ上記各粉砕ロールはその外周面が溝によって凹凸面に形成されているロール粉砕手段を用いて、各段階における対の粉砕ロール間で荒粉砕・中粉砕・仕上げ粉砕するものであり、荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールのそれぞれの溝形状が♯５〜♯２０、♯１０〜♯３０及び♯１５〜♯４０であることにある。
本発明の第５の特徴は、上記第１又は第４の特徴を前提とし、かつ微粉砕工程では、微粉砕手段として対の荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールを配置しかつ上記各粉砕ロールはその外周面が溝によって凹凸面に形成されているロール粉砕手段を用いて、各段階における対の粉砕ロール間で荒粉砕・中粉砕・仕上げ粉砕するものであり、荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールのそれぞれが対向する粉砕ロールの表面速度差比率がいずれも１／４０〜１／５であることにある。
本発明の第６の特徴は、上記第１の特徴を前提とし、かつ微粉砕工程では、微粉砕手段として固定刃と粉砕ロールとを用いて、各段階における固定刃と粉砕ロールとの間で荒粉砕・中粉砕・仕上げ粉砕をするものであることにある。
本発明の第７の特徴は、上記第１乃至第６のいずれかの特徴を前提とし、かつゴム原材料は、予備粉砕工程において予備粉砕手段によって細粉砕ゴムに処理されることにある。
本発明の第８の特徴は、上記第１乃至第７のいずれかの特徴を前提とし、かつ微粉砕工程に後続して分離工程を設け、この分離工程では微粉砕ゴム中に含まれかつ互いに連なっているゴムの粒体に対して衝撃力を付与して強制的に分離することにある。
本発明の第９の特徴は、上記第１乃至第８のいずれかの特徴を前提とし、かつ ゴム原材料は、その大きさが１ｍｍ〜８ｍｍのゴムチップであることにある。 The first feature of the present invention is that the raw rubber material processed from unnecessary rubber into chips is added from the coarsely crushed rubber to the coarsely crushed rubber by rough pulverization, medium pulverization and finish pulverization while adding an anti-sticking agent by means of fine pulverization. Then, a fine pulverization step for sequentially finishing the finely pulverized rubber and a classification recovery step for classifying the finely pulverized rubber and recovering at least a part thereof as a fine powder rubber product are provided.
The second feature of the present invention is based on the first feature described above, and in the fine pulverization step, a roll pulverizing means in which a pair of coarse pulverization roll, medium pulverization roll and finish pulverization roll are arranged as fine pulverization means. It is used for rough pulverization, medium pulverization, and finish pulverization between a pair of pulverizing rolls in each stage.
The third feature of the present invention is based on the first feature, and in the fine pulverization step, a pair of coarse pulverization roll, medium pulverization roll and finish pulverization roll are arranged as fine pulverization means, and each of the pulverization rolls is The purpose is to perform rough pulverization / medium pulverization / finish pulverization between a pair of pulverizing rolls at each stage using a roll pulverizing means whose outer peripheral surface is formed as an uneven surface.
The fourth feature of the present invention is based on the first feature, and in the fine pulverization step, a pair of coarse pulverization roll, medium pulverization roll and finish pulverization roll are arranged as fine pulverization means, and each of the pulverization rolls is Using the roll crushing means whose outer peripheral surface is formed on the uneven surface by grooves, rough crushing, medium crushing and finish crushing between a pair of crushing rolls at each stage, a rough crushing roll, a medium crushing roll and The groove shapes of the finish grinding rolls are # 5 to # 20, # 10 to # 30, and # 15 to # 40.
The fifth feature of the present invention is based on the above first or fourth feature, and in the fine pulverization step, a pair of coarse pulverization roll, medium pulverization roll and finish pulverization roll are arranged as fine pulverization means, and The pulverizing roll uses a roll pulverizing means whose outer peripheral surface is formed in an uneven surface by grooves, and is used for rough pulverization / medium pulverization / finish pulverization between a pair of pulverization rolls at each stage. The ratio of the surface speed difference between the pulverizing rolls facing each of the pulverizing roll and the finishing pulverizing roll is from 1/40 to 1/5.
The sixth feature of the present invention is based on the first feature described above, and in the fine pulverization step, a fixed blade and a pulverization roll are used as fine pulverization means, and between the fixed blade and the pulverization roll in each stage. Rough, medium, and finish pulverization.
The seventh feature of the present invention is based on any one of the first to sixth features described above, and the rubber raw material is processed into a finely pulverized rubber by a preliminary pulverizing means in the preliminary pulverizing step.
The eighth feature of the present invention is based on any one of the first to seventh features described above, and is provided with a separation step subsequent to the fine pulverization step. It is to forcibly separate by applying an impact force to the continuous rubber particles.
The ninth feature of the present invention is based on any one of the first to eighth features, and the rubber raw material is a rubber chip having a size of 1 mm to 8 mm.

本発明によれば、チップ状のゴム原材料を固着防止剤を添加しながら微粉砕ゴムにする微粉砕工程により、簡易にかつ効率良く粒径が極めて小さい微粉砕ゴムが得られる。
本発明によれば、分離工程を経ることにより微粉砕ゴムにおける連なっているゴムの粒体に対して衝撃力を付与することにより分散させ、微粉砕ゴムの分級が効率的に行える。 According to the present invention, a finely pulverized rubber having a very small particle diameter can be obtained easily and efficiently by a pulverizing step in which a chip-like rubber raw material is made into a finely pulverized rubber while adding an anti-sticking agent.
According to the present invention, the finely pulverized rubber can be classified efficiently by applying an impact force to the continuous rubber particles in the finely pulverized rubber through the separation step.

図１及び図２に示す本発明に係る微粉砕ゴムの製法は下記の３工程を備えている。
予備粉砕工程：ゴムチップを予備粉砕手段である予備粉砕機１によって細粉砕ゴムに加
工する。
微粉砕工程 ：上記細粉砕ゴムを微粉砕手段である微粉砕機２によって固着防止剤を添
加しながら段階的に粉砕して最終的に微粉砕ゴムに仕上げる。
分級回収工程：分級手段である分級機３により上記微粉砕ゴムを所定の粒径を有する微
粉ゴム（所定の粒径より小さい粒径を有する微粉ゴムを含む。）とそれ
以外のものに分級（選別）して製品として回収する。
なお、後述するように、予備粉砕工程は必要に応じて上記製法に組み込むものであり、選択的な工程である。 The method for producing finely pulverized rubber according to the present invention shown in FIGS. 1 and 2 includes the following three steps.
Pre-grinding step: The rubber chips are added to the finely crushed rubber by the pre-grinding machine 1 which is a pre-grinding means.
Work.
Fine pulverization step: An anti-sticking agent is added to the fine pulverized rubber by the fine pulverizer 2 which is a fine pulverization means.
Pulverized step by step, and finally finished into finely crushed rubber.
Classifying and collecting step: The finely pulverized rubber having a predetermined particle diameter is classified by the classifier 3 which is a classifying means.
Powdered rubber (including finely divided rubber having a particle size smaller than a predetermined particle size) and it
Classification (sorting) to something other than that and collecting as a product.
In addition, as will be described later, the preliminary pulverization step is an optional step that is incorporated into the above-described manufacturing method as necessary.

予備粉砕工程においては、図２に示すように例えば廃タイヤ（ビートワイヤなどタイヤ補強材除去処理済）を幾つかに切断したカットタイヤを所定の大きさに破砕したゴムチップ（タイヤチップ）をゴム原材料として予備粉砕機１に投入し、粉砕室内に設けられている粉砕部によって細粉砕ゴムに加工する。予備粉砕機１に供給するゴムチップは適宜であるが、１ｍｍ〜８ｍｍ程度の大きさにカットしておくことが、細粉砕ゴムの粒径を小さくするのに役立つ。ゴムチップに対して予め加熱しておくことによって、予備粉砕機１による細粉砕を円滑にするが、通常の温度で処理することに何等の問題はなく、予熱の付加作業をするか否かは適宜選択される。
またゴムチップを予備粉砕機１で複数回繰り返して粉砕することにより、小さい粒径の細粉砕ゴムを生産することができる。
ゴムチップの大きさの範囲は１ｍｍ〜８ｍｍに限られないが、１ｍｍより小さい場合には予備粉砕工程以前において粉砕加工に手間がかかり、また８ｍｍより大きい場合には予備粉砕工程における粉砕効率の低下を招く。
予備粉砕機１としては、ゴムチップを攪拌粉砕する押出機、ロールによって粉砕するロール粉砕機など適宜のものが選択される。 In the preliminary pulverization step, as shown in FIG. 2, for example, rubber chips (tire chips) obtained by crushing a cut tire obtained by cutting a waste tire (having a tire reinforcing material such as a beat wire removed) into a predetermined size are used as rubber raw materials. To the pre-pulverizer 1 and processed into a finely pulverized rubber by a pulverization section provided in the pulverization chamber. The rubber chip supplied to the preliminary pulverizer 1 is appropriate, but cutting to a size of about 1 mm to 8 mm helps to reduce the particle size of the finely pulverized rubber. By preheating the rubber chips, the fine pulverization by the preliminary pulverizer 1 is made smooth. However, there is no problem in processing at a normal temperature, and whether or not to perform preheating is appropriately determined. Selected.
Further, finely pulverized rubber having a small particle diameter can be produced by repeatedly pulverizing the rubber chip with the preliminary pulverizer 1 a plurality of times.
The range of the size of the rubber chip is not limited to 1 mm to 8 mm, but if it is smaller than 1 mm, it takes time to grind before the preliminary grinding step, and if it is larger than 8 mm, the grinding efficiency in the preliminary grinding step is reduced. Invite.
As the preliminary pulverizer 1, an appropriate one such as an extruder for stirring and pulverizing rubber chips or a roll pulverizer for pulverizing with a roll is selected.

微粉砕工程においては、図１及び図２に示すように、予備粉砕機１で処理された上記細粉砕ゴムは微粉砕機２によって荒粉砕から中粉砕を経て仕上げ粉砕されて微粉砕ゴムに加工される。微粉砕機２は荒粉砕部２ａ、中粉砕部２ｂ及び仕上げ粉砕部２ｃを上段（又は上流）から下段（又は下流）に向けて連続的に配置しているロール粉砕手段である。荒粉砕部２ａ、中粉砕部２ｂ及び仕上げ粉砕部２ｃはいずれも対の荒粉砕ロール２ａ１１，２ａ１２、対の中粉砕ロール２ｂ１１，２ｂ１２及び対の仕上げ粉砕ロール２ｃ１１，２ｃ１２を一段又は複数段に配置している構成である。
ゴムチップは荒粉砕ロール２ａ１１，２ａ１２によって荒粉砕され、ふるい機２ａ２によって予め計画されている所定の粒径の粉砕ゴムのみが荒粉砕ゴムとして、中粉砕工程へ送られ、所定値を超えるものは非荒粉砕ゴムとして荒粉砕部２ａに戻されて再び処理される。そして荒粉砕ゴムは中粉砕ロール２ｂ１１，２ｂ１２に供給されて中粉砕され、ふるい機２ｂ２によって所定の粒径の粉砕ゴムのみが中粉砕ゴムとして、仕上げ工程へ送られ、所定値を超えるものは非中粉砕ゴムとして中粉砕部２ｂに戻されて再び処理される。さらに、中粉砕ゴムは仕上げ粉砕ロール２ｃ１１，２ｃ１２によって微粉砕ゴムに仕上げられる。仕上げ粉砕工程で処理された微粉砕ゴムは分級回収工程における分級機３へ送られる。
微粉砕機２による荒粉砕及び中粉砕の各過程で排出される非荒粉砕ゴム及び非中粉砕ゴムに含まれている金属は、荒粉砕部２ａ及び中粉砕部２ｂにそれぞれ戻される直前に、金属除去装置２ａ３，２ｂ３によって除去される。
微粉砕工程において添加される固着防止剤は、荒粉砕部２ａ、中粉砕部２ｂ及び仕上げ粉砕部２ｃの上部に配置してある攪拌器２ａ４，２ｂ４，２ｃ４に供給され、攪拌器内で粉砕ゴムと均一に攪拌されて上記荒粉砕部、中粉砕部及び仕上げ粉砕部にそれぞれ投入される。
固着防止剤は、充填材（炭酸カルシウム、アルミナ、酸化亜鉛等）や補強材（カーボンブラック、タルク、シリカなど）が適当である。固着防止剤の種類は、製造コスト、微粉砕ゴムの用途などを考慮して適宜選択される。
固着防止剤を添加することによって粉砕ゴムの表面がコーティングされ、粉砕ゴム同士が再び付着結合することが抑制され、ふるい機２ａ２，２ｂ２による選別や分級機３による分級（選別）が効率的にかつ容易となる利点がある。この種の利点を確保しながらも、固着防止剤の添加量が少ないことがコストダウンに寄与し、タイヤの原材料として再利用するのに好都合である。
微粉砕機２における粉砕ロール２ａ１１，２ａ１２、２ｂ１１，２ｂ１２、２ｃ１１，２ｃ１２のそれぞれの外周面は凹凸面となっている。この凹凸面にはローレットによる溝によって形成される片綾目又は両綾目で構成されているもの、上記外周面にスパイラル状に溝を切って形成されているもの、上記外周面にダイヤモンド粉を溶射して形成されたものなどが含まれる。荒粉砕ロール２ａ１１，２ａ１２、中粉砕ロール２ｂ１１，２ｂ１２、仕上げ粉砕ロール２ｃ１１，２ｃ１２の外周面が凹凸面であることによって、粉砕ゴム（荒粉砕ゴム、中粉砕ゴム、微粉砕ゴム）は、各粉砕段階における荒粉砕ロール、中粉砕ロール、仕上げ粉砕ロールのそれぞれの間でせん断力により粉砕される。
そして対の荒粉砕ロール２ａ１１，２ａ１２、対の中粉砕ロール２ｂ１１，２ｂ１２及び対の仕上げ粉砕ロール２ｃ１１，２ｃ１２は、それぞれ対の粉砕ロールの一方が低速側、他方が高速側であって、双方の回転に速度差がある。
予め計画されている粉砕ゴムの粒径に応じて、各段階における粉砕ロール２ａ１１，２ａ１２、２ｂ１１，２ｂ１２、２ｃ１１，２ｃ１２の溝形状、表面速度差比率及びロール間隙（ギャップ）などの加工条件を調整して粉砕加工をする。
荒粉砕ロール２ａ１１，２ａ１２、中粉砕ロール２ｂ１１，２ｂ１２及び仕上げ粉砕ロール２ｃ１１，２ｃ１２のそれぞれの溝形状を後述する実施例の範囲すなわち、♯５〜♯２０、♯１０〜♯３０、♯１５〜♯４０に設定した場合において、上記各範囲の下限値より小さくすると、また上限値より大きくすると、いずれも粉砕効率が低下する可能性がある。また荒粉砕ロール２ａ１１，２ａ１２、中粉砕ロール２ｂ１１，２ｂ１２及び仕上げ粉砕ロール２ｃ１１，２ｃ１２の各速度差比率を１／４０（１：４０）〜１／５（１：５）に設定した場合において、上記範囲の下限値が１／４０未満であると、また上限値が１／５を超えると、いずれも生産効率が低下する可能性がある。
各段階における粉砕ロール２ａ１１，２ａ１２、２ｂ１１，２ｂ１２、２ｃ１１，２ｃ１２の構成（段数、溝形状、表面速度差比率及びロール間隙など）は粉砕粒径に応じて最適なものを選択する。
微粉砕工程における粉砕ゴムの温度上昇を抑え、粉砕ロール２ａ１１，２ａ１２、２ｂ１１，２ｂ１２、２ｃ１１，２ｃ１２の真直度を維持するために、上記粉砕ロールを冷却することが望ましい。 In the fine pulverization step, as shown in FIGS. 1 and 2, the finely pulverized rubber processed by the preliminary pulverizer 1 is processed by the fine pulverizer 2 from rough pulverization to intermediate pulverization to finish pulverization. Is done. The fine pulverizer 2 is roll pulverizing means in which the rough pulverization unit 2a, the intermediate pulverization unit 2b, and the finish pulverization unit 2c are continuously arranged from the upper stage (or upstream) to the lower stage (or downstream). The rough pulverizing unit 2a, the intermediate pulverizing unit 2b, and the finishing pulverizing unit 2c are all arranged in one or a plurality of pairs of rough pulverizing rolls 2a11, 2a12, a pair of medium pulverizing rolls 2b11, 2b12, and a pair of finishing pulverizing rolls 2c11, 2c12. This is the configuration.
The rubber chips are roughly pulverized by the rough pulverizing rolls 2a11 and 2a12, and only the pulverized rubber having a predetermined particle size planned in advance by the sieving machine 2a2 is sent to the intermediate pulverizing process as the rough pulverized rubber. The rough crushed rubber is returned to the rough pulverized portion 2a and processed again. The coarsely pulverized rubber is supplied to the medium pulverizing rolls 2b11 and 2b12 and is pulverized, and only the pulverized rubber having a predetermined particle diameter is sent to the finishing process as the intermediate pulverized rubber by the sieving machine 2b2. It returns to the middle grinding part 2b as a middle ground rubber and is processed again. Further, the medium pulverized rubber is finished into finely pulverized rubber by finishing pulverizing rolls 2c11 and 2c12. The finely pulverized rubber processed in the finish pulverization process is sent to the classifier 3 in the classification recovery process.
The metals contained in the non-rough pulverized rubber and the non-medium pulverized rubber discharged in each process of rough pulverization and medium pulverization by the fine pulverizer 2 are immediately returned to the rough pulverization part 2a and the medium pulverization part 2b, respectively. The metal removal devices 2a3 and 2b3 remove the metal.
The anti-sticking agent added in the fine pulverization step is supplied to the stirrers 2a4, 2b4 and 2c4 arranged above the rough pulverization part 2a, the middle pulverization part 2b and the finish pulverization part 2c, and the crushed rubber in the stirrer Are uniformly stirred and put into the rough pulverizing part, the medium pulverizing part and the finishing pulverizing part, respectively.
As the anti-sticking agent, fillers (calcium carbonate, alumina, zinc oxide, etc.) and reinforcing materials (carbon black, talc, silica, etc.) are suitable. The type of the anti-sticking agent is appropriately selected in consideration of the manufacturing cost, the use of finely pulverized rubber, and the like.
By adding the anti-sticking agent, the surface of the pulverized rubber is coated, and the crushed rubber is prevented from adhering and bonding again, and the sorting by the sieving machines 2a2 and 2b2 and the classification (sorting) by the classifier 3 are efficient and There is an advantage that becomes easy. While securing this type of advantage, a small amount of anti-sticking agent contributes to cost reduction and is convenient for reuse as a tire raw material.
The outer peripheral surfaces of the pulverizing rolls 2a11, 2a12, 2b11, 2b12, 2c11, and 2c12 in the pulverizer 2 are uneven surfaces. This uneven surface is composed of one or both cross-shaped grooves formed by grooves by knurls, one formed by cutting grooves in a spiral shape on the outer peripheral surface, and diamond powder on the outer peripheral surface. Includes those formed by thermal spraying. The crushed rubber (rough crushed rubber, medium crushed rubber, fine crushed rubber) is crushed by the outer peripheral surfaces of the rough crushed rolls 2a11, 2a12, medium crushed rolls 2b11, 2b12, and finish crushed rolls 2c11, 2c12 being uneven surfaces. Between the rough pulverizing roll, the middle pulverizing roll, and the finishing pulverizing roll in the stage, pulverization is performed by shearing force.
The pair of coarse pulverizing rolls 2a11 and 2a12, the pair of medium pulverizing rolls 2b11 and 2b12, and the pair of finishing pulverizing rolls 2c11 and 2c12 are such that one of the pair of pulverizing rolls is the low speed side and the other is the high speed side. There is a speed difference in rotation.
Process conditions such as groove shape, surface speed difference ratio and roll gap (gap) of pulverizing rolls 2a11, 2a12, 2b11, 2b12, 2c11, 2c12 at each stage are adjusted according to the planned particle size of pulverized rubber And pulverize.
The groove shapes of the rough pulverizing rolls 2a11 and 2a12, the medium pulverizing rolls 2b11 and 2b12, and the finishing pulverizing rolls 2c11 and 2c12 are within the scope of the embodiments described later, that is, # 5 to # 20, # 10 to # 30, and # 15 to #. When it is set to 40, if it is smaller than the lower limit value of each of the above ranges and larger than the upper limit value, the pulverization efficiency may be lowered in any case. In addition, in the case where each speed difference ratio of the rough pulverizing rolls 2a11, 2a12, the medium pulverizing rolls 2b11, 2b12 and the finishing pulverizing rolls 2c11, 2c12 is set to 1/40 (1:40) to 1/5 (1: 5), If the lower limit value of the above range is less than 1/40 and the upper limit value exceeds 1/5, the production efficiency may decrease in any case.
The configuration of the pulverizing rolls 2a11, 2a12, 2b11, 2b12, 2c11, 2c12 (the number of steps, groove shape, surface speed difference ratio, roll gap, etc.) at each stage is selected according to the pulverized particle size.
In order to suppress the temperature rise of the pulverized rubber in the pulverizing step and to maintain the straightness of the pulverizing rolls 2a11, 2a12, 2b11, 2b12, 2c11 and 2c12, it is desirable to cool the pulverizing roll.

分級回収工程は、微粉砕工程において固着防止剤が添加された微粉砕ゴムを分級機３によって分級して回収する工程である。
分級回収工程において、仕上げ粉砕部２ｃで処理された仕上げ粉砕ゴムは分級機３へ送られて、所定粒径の微粉砕ゴムとそれ以外のものとに選別され、所定粒径の微粉砕ゴムのみが微粉末ゴム製品として回収タンクなどの回収部６に回収され、所定粒径を超えた微粉砕ゴム（非微粉砕ゴム）は仕上げ粉砕部２ｃへ戻されて、再度仕上げ粉砕ゴムにするための粉砕が繰り返される。
勿論、求める粒径が多種に亘る場合には、選別された所定粒径の微粉砕ゴムとそれ以外のものとをすべて製品として回収することがある。
仕上げ粉砕部２ｃから排出される非微粉砕ゴムに含まれている金属は上記仕上げ粉砕部に戻される前に金属除去装置２ｃ３によって除去される。
分級機３としてふるい機などが用いられる。 The classifying and collecting step is a step of classifying and collecting the finely pulverized rubber added with the anti-sticking agent in the finely pulverizing step with the classifier 3.
In the classifying and collecting step, the finished pulverized rubber processed in the finishing pulverization unit 2c is sent to the classifier 3, and is classified into finely pulverized rubber having a predetermined particle diameter and others, and only the finely pulverized rubber having a predetermined particle diameter is used. Is recovered as a finely powdered rubber product in a recovery unit 6 such as a recovery tank, and finely pulverized rubber (non-finely pulverized rubber) exceeding a predetermined particle size is returned to the finish pulverizing unit 2c to be used as finished pulverized rubber again. The grinding is repeated.
Of course, when there are a wide variety of desired particle sizes, the selected finely pulverized rubber having a predetermined particle size and all other particles may be collected as a product.
The metal contained in the non-finely pulverized rubber discharged from the finish pulverizing unit 2c is removed by the metal removing device 2c3 before being returned to the finish pulverizing unit.
As the classifier 3, a sieve or the like is used.

実施例１について説明する。
予熱６０°Ｃが与えられた３ｍｍゴムチップを予備粉砕機１に５回通して細粉砕ゴムに加工してから、微粉砕機２に供給し、細粉砕ゴムの供給量に対して固着防止剤として炭酸カルシウムを４重量％を添加しながら微粉砕機によって段階的に粉砕し、荒粉砕、中粉砕及び仕上げ粉砕の各工程を経るまでに合計１５０回の粉砕をし、最終的に分級機３によって選別されて回収した製品となる微粉砕ゴムは５６．６％であり、残りは再度荒粉砕部２ａに戻した。
回収した微粉砕ゴム製品のうち、粒径０．０７５ｍｍ（♯２００）の微粉砕ゴムの補足率は５０％であった。
使用した微粉砕機２における荒粉砕ロール２ａ１１，２ａ１２、中粉砕ロール２ｂ１１，２ｂ１２及び仕上げ粉砕ロール２ｃ１１，２ｃ１２のロール溝形状、ロール表面速度差比率は下記の表のとおりである。

Figure 0004565989
Example 1 will be described.
A 3 mm rubber chip given a preheat of 60 ° C. is passed through the preliminary pulverizer 1 5 times to be processed into a finely pulverized rubber, and then supplied to the fine pulverizer 2 as an anti-sticking agent for the amount of finely pulverized rubber supplied. Calcium carbonate is pulverized stepwise with a fine pulverizer while adding 4% by weight, and pulverized a total of 150 times before going through the steps of rough pulverization, medium pulverization and finish pulverization. The finely pulverized rubber as a product collected after sorting was 56.6%, and the rest was returned to the coarsely pulverized portion 2a again.
Among the recovered finely pulverized rubber products, the supplement rate of finely pulverized rubber having a particle size of 0.075 mm (# 200) was 50%.
The roll groove shapes and roll surface speed difference ratios of the rough pulverizing rolls 2a11, 2a12, the medium pulverizing rolls 2b11, 2b12 and the finishing pulverizing rolls 2c11, 2c12 in the used fine pulverizer 2 are as shown in the following table.
Figure 0004565989

実施例２について説明する。
本例では、溝形状を両綾目にした以外は実施例１の加工条件と同じである。
得られた結果は実施例１と同様であった。 Example 2 will be described.
In this example, the processing conditions are the same as those in Example 1 except that the groove shape is double crossed.
The results obtained were the same as in Example 1.

図２に示す製法に関して、一連の処理工程の一環として予備粉砕工程を備えていることを前提して説明しているが、必ずしも予備粉砕工程を要するものではない。ゴムチップの粒径によっては、図１に示すように予備粉砕工程を省略してゴム原材料であるゴムチップを直接荒粉砕工程の荒粉砕部２ａに投入しても良い。   The manufacturing method shown in FIG. 2 is described on the assumption that a preliminary pulverization step is provided as part of a series of processing steps, but the preliminary pulverization step is not necessarily required. Depending on the particle size of the rubber chip, the preliminary pulverization step may be omitted as shown in FIG.

本発明に係る他の微粉砕ゴムの製法について図３及び図４を参照して説明する。
図３及び図４に示す微粉砕ゴムの製法は、図１及び図２に示す微粉砕ゴムの製法を前提として微粉砕工程と分級回収工程の間に分離工程を付加したものである。このため、図４では、共通する製造システムの構成に関しては図２に付されている符号をそのまま使用している。また当該製法と図１に示す製法と共通する工程についての説明を省略する。
図４に示すように、仕上げ粉砕部２ｃによって処理された微粉砕ゴムはふるい機２ｃ２によって仕上げ微粉砕ゴムと粒径が求める値を満たさない仕上げ微粉砕ゴム（非仕上げ微粉砕ゴム）とに区別され、仕上げ微粉砕ゴムは分離機４へ送られ、また非微粉砕ゴムは仕上げ粉砕部２ｃに戻されて再び処理される。上記非仕上げ微粉砕ゴムに含まれている金属は、仕上げ粉砕部２ｃに戻される前に金属除去装置２ｃ３によって除去される。
分離工程では、仕上げ微粉砕ゴムの互いに連なっているゴムの粒体に対して分離機４によって衝撃力を付与して強制的に分離してより小さい粒径の微粉砕ゴムにする。すなわち、図４に示すように、仕上げ粉砕部２ｃによって処理された仕上げ微粉砕ゴムは分離機４に送られて、この分離機の分離室内に設けられている分離回転ディスク４ａの回転によって分離加工される。仕上げ微粉砕ゴムはその回転に伴って分離室内を円周方向に回転移動し、分離室内壁などに繰り返し衝突され、その衝撃力と、高速回転する分離回転ディスクによって生じる気流に乗ったゴム同士の摩擦力とが分離に寄与する。
分離機４には固着防止剤が投入されるが、この投入は分離工程では選択的であって、常に必要不可欠なものではない。
分離回転ディスクの回転数の範囲（周速度の範囲を含む。）はディスクの大きさ及び容積率並びに求める粒径に応じて適宜設定する。
また分離機４への仕上げ微粉砕ゴムの供給量は分離室の容積に対する充填率の大小によって分離効率が変化するので、最適な充填率を選択する。
分離機４によって分離処理された微粉砕ゴムは分級機３に送られて、所定粒径の微粉砕ゴムとそれ以外のものとに選別され、所定粒径の微粉砕ゴムのみが回収タンクなどの回収部６に回収され、所定粒径を超える微粉砕ゴムは荒粉砕部２ａに戻される。
図３及び図４に示す製法によれば、分離工程を経ることにより、微粉砕ゴムの互いに連なっているゴムの粒体を強制的に分離させ、連なっている粒体の分散化が図られ、分級が効率的に行える。 Another method for producing finely pulverized rubber according to the present invention will be described with reference to FIGS.
The method for producing finely pulverized rubber shown in FIGS. 3 and 4 is obtained by adding a separation step between the finely pulverized step and the classifying and collecting step on the premise of the method for producing finely pulverized rubber shown in FIGS. For this reason, in FIG. 4, the code | symbol attached | subjected to FIG. 2 is used as it is regarding the structure of a common manufacturing system. Further, the description of the steps common to the manufacturing method and the manufacturing method shown in FIG. 1 is omitted.
As shown in FIG. 4, the finely pulverized rubber processed by the finish pulverizing unit 2c is classified into a final finely pulverized rubber and a finely pulverized rubber (non-finished finely pulverized rubber) that does not satisfy the value required by the particle size by the sieving machine 2c2. Then, the finished finely pulverized rubber is sent to the separator 4, and the non-finely pulverized rubber is returned to the finish pulverizing unit 2c and processed again. The metal contained in the non-finished finely pulverized rubber is removed by the metal removing device 2c3 before being returned to the finish pulverizing unit 2c.
In the separation step, impact force is applied to the rubber particles of the finished fine pulverized rubber that are continuous with each other by the separator 4 to forcibly separate the pulverized rubber into smaller pulverized rubber having a smaller particle diameter. That is, as shown in FIG. 4, the finished finely pulverized rubber processed by the finish pulverizing unit 2c is sent to the separator 4 and separated by the rotation of the separation rotating disk 4a provided in the separation chamber of the separator. Is done. The finely pulverized finish rubber rotates in the circumferential direction in the separation chamber as it rotates, repeatedly hits the separation chamber wall, etc., and the impact force between the rubbers riding on the airflow generated by the separation rotating disk rotating at high speed Friction force contributes to separation.
The separator 4 is charged with an anti-sticking agent, but this charging is selective in the separation process and is not always indispensable.
The rotational speed range (including the peripheral speed range) of the separation rotating disk is appropriately set according to the size and volume ratio of the disk and the desired particle size.
In addition, the amount of the finely pulverized rubber supplied to the separator 4 varies depending on the filling rate relative to the volume of the separation chamber, so that the optimum filling rate is selected.
The finely pulverized rubber separated by the separator 4 is sent to the classifier 3 and sorted into finely pulverized rubber having a predetermined particle size and other particles, and only the finely pulverized rubber having a predetermined particle size is collected in a recovery tank or the like. Finely pulverized rubber recovered in the recovery unit 6 and exceeding a predetermined particle size is returned to the rough pulverization unit 2a.
According to the manufacturing method shown in FIG. 3 and FIG. 4, by passing through the separation step, the rubber particles continuously connected to each other of the finely pulverized rubber are forcibly separated, and the continuous particles are dispersed. Classification can be performed efficiently.

本発明に係るさらに他の微粉砕ゴムの製法について図５を参照して説明する。
図５に示す微粉砕ゴムの製法は微粉砕工程において使用する微粉砕手段５が図４に示す前記微粉砕手段２と相違している点を除いて図４に示す微粉砕ゴムの製法と同一構成である。このため、図５では、共通する製造システムの構成に関しては図４に付されている符号をそのまま使用している。また当該製法と図３及び図４に示す製法との共通する工程についての説明を省略する。
微粉砕手段５における荒粉砕部５ａは固定刃５ａ１１と荒粉砕ロール５ａ１２を、中粉砕部５ｂは固定刃５ｂ１１と中粉砕ロール５ｂ１２を、さらに仕上げ粉砕部５ｃは固定刃５ｃ１１と仕上げ粉砕ロール５ｃ１２をそれぞれ一段又は複数段配置されている。
荒粉砕ロール５ａ１２、中粉砕ロール５ｂ１２及び仕上げ粉砕ロール５ｃ１２の外周面には、前記粉砕ロール２ａ１１，２ａ１２、２ｂ１１，２ｂ１２、２ｃ１１，２ｃ１２と同様の凹凸面が形成されている。
粉砕ゴムは、各粉砕段階で固定刃５ａ１１と荒粉砕ロール５ａ１２、固定刃５ｂ１１と中粉砕ロール５ｂ１２、固定刃５ｃ１１と仕上げ粉砕ロール５ｃ１２のそれぞれの間でせん断力により粉砕される。
ふるい機５ａ２，５ｂ２，５ｃ２、金属除去装置５ａ３，５ｂ３，５ｃ３及び攪拌器５ａ４，５ｂ４，５ｃ４は、ふるい機２ａ２，２ｂ２，２ｃ２、金属除去装置２ａ３，２ｂ３，２ｃ３及び攪拌器２ａ４，２ｂ４，２ｃ４にそれぞれ対応している。 Still another finely pulverized rubber manufacturing method according to the present invention will be described with reference to FIG.
The manufacturing method of the finely pulverized rubber shown in FIG. 5 is the same as the method of manufacturing the finely pulverized rubber shown in FIG. 4 except that the pulverizing means 5 used in the pulverizing step is different from the finely pulverizing means 2 shown in FIG. It is a configuration. For this reason, in FIG. 5, the code | symbol attached | subjected to FIG. 4 is used as it is regarding the structure of a common manufacturing system. Further, description of the steps common to the manufacturing method and the manufacturing method shown in FIGS. 3 and 4 is omitted.
In the fine pulverizing means 5, the rough pulverizing part 5a has a fixed blade 5a11 and a rough pulverizing roll 5a12, the intermediate pulverizing part 5b has a fixed blade 5b11 and an intermediate pulverizing roll 5b12, and the finish pulverizing part 5c has a fixed blade 5c11 and a final pulverizing roll 5c12. Each one or more stages are arranged.
On the outer peripheral surfaces of the rough pulverizing roll 5a12, the medium pulverizing roll 5b12, and the finishing pulverizing roll 5c12, uneven surfaces similar to the pulverizing rolls 2a11, 2a12, 2b11, 2b12, 2c11, and 2c12 are formed.
The pulverized rubber is pulverized by shearing force between the fixed blade 5a11 and the rough pulverizing roll 5a12, the fixed blade 5b11 and the medium pulverizing roll 5b12, and the fixed blade 5c11 and the finishing pulverizing roll 5c12 at each pulverization stage.
Sieve machines 5a2, 5b2, 5c2, metal removers 5a3, 5b3, 5c3 and stirrers 5a4, 5b4, 5c4 are sieve machines 2a2, 2b2, 2c2, metal removers 2a3, 2b3, 2c3 and agitators 2a4, 2b4, 2c4. It corresponds to each.

図３及び図５に示す各微粉砕ゴムの製法についても、予備粉砕工程を省略してゴム原材料であるゴムチップを荒粉砕部２ａ，５ａに直接投入しても良い。
図示する微粉砕機２は横型であるが、縦型のものであっても良い。そして図２及び図４に示す微粉砕機２の各段階の粉砕部２ａ，２ｂ，２ｃにおける対の粉砕ロール２ａ１１，２ａ１２、対の粉砕ロール２ｂ１１，２ｂ１２、対の粉砕ロール２ｃ１１，２ｃ１２をそれぞれの段階で図水平方向に複数対並べて、各段階で複数段のロール粉砕処理をするようにして、量産性及び生産の能率向上を図っても良い。このことは、図５に示す微粉砕機５にも適用することができる。各段階での複数段でのロール粉砕処理を行う場合には上流側から下流側に向けて粉砕ロールの溝形状、表面速度差比率、ギャップなど加工条件が変更される。もちろん、図２、図４及び図５に示す微粉砕機２，５のように、一段のロール粉砕処理によるものであっても良いことは当然である。
上述の製法では、固着防止剤を荒粉砕部２ａ，５ａ、中粉砕部２ｂ，５ｂ及び仕上げ粉砕部２ｃ，５ｃのそれぞれに投入する例で説明しているが、荒粉砕部に投入しない場合もあり、いずれにしても求める粉砕ゴムの粒径や粉砕状態などに応じて固着防止剤の投入対象となる粉砕部を省略するか否が選択される。 3 and FIG. 5, the pre-grinding step may be omitted and the rubber chips, which are rubber raw materials, may be directly fed into the rough grinding portions 2a and 5a.
The illustrated pulverizer 2 is a horizontal type, but may be a vertical type. 2 and 4, a pair of pulverizing rolls 2a11, 2a12, a pair of pulverizing rolls 2b11, 2b12, and a pair of pulverizing rolls 2c11, 2c12 are respectively connected to each of the pulverizing units 2a, 2b, 2c of the fine pulverizer 2 shown in FIGS. A plurality of pairs may be arranged in the horizontal direction in the stage, and a plurality of stages of roll crushing may be performed in each stage to improve mass productivity and production efficiency. This can also be applied to the pulverizer 5 shown in FIG. When performing roll pulverization processing in a plurality of stages at each stage, processing conditions such as the groove shape, surface speed difference ratio, and gap of the pulverization roll are changed from the upstream side toward the downstream side. Of course, as in the case of the fine pulverizers 2 and 5 shown in FIG. 2, FIG. 4 and FIG.
In the above-described manufacturing method, an example is described in which the anti-sticking agent is added to each of the coarse pulverization units 2a and 5a, the intermediate pulverization units 2b and 5b, and the finish pulverization units 2c and 5c. In any case, it is selected whether or not to omit the pulverized portion to be charged with the anti-sticking agent depending on the particle size or pulverized state of the pulverized rubber to be obtained.

本発明に係る微粉砕ゴムの製法のフローチャートである。It is a flowchart of the manufacturing method of the pulverized rubber | gum which concerns on this invention. 本発明に係る微粉砕ゴムの製法を実施するための製造システムを示す構成図である。It is a block diagram which shows the manufacturing system for enforcing the manufacturing method of the fine ground rubber | gum which concerns on this invention. 本発明に係る他の微粉砕ゴムの製法のフローチャートであって、予備粉砕工程を省略しているチャートである。It is a flowchart of the manufacturing method of the other finely pulverized rubber | gum which concerns on this invention, Comprising: It is the chart which has abbreviate | omitted the preliminary | backup grinding | pulverization process. 本発明に係る他の微粉砕ゴムの製法を実施するための製造システムを示す構成図である。It is a block diagram which shows the manufacturing system for enforcing the manufacturing method of the other finely pulverized rubber | gum which concerns on this invention. 本発明に係るさらに他の微粉砕ゴムの製法を実施するための製造システムを示す構成図である。It is a block diagram which shows the manufacturing system for enforcing the manufacturing method of the further another finely pulverized rubber based on this invention.

符号の説明Explanation of symbols

１ 予備粉砕機（予備粉砕手段）
２ 微粉砕機（微粉砕手段）
２ａ 荒粉砕部
２ａ１１，２ａ１２ 荒粉砕ロール
２ａ２ ふるい機
２ａ４ 攪拌器
２ｂ 中粉砕部
２ｂ１１，２ｂ１２ 中粉砕ロール
２ｂ２ ふるい機
２ｂ４ 攪拌器
２ｃ 仕上げ粉砕部
２ｃ１１，２ｃ１２ 仕上げ粉砕ロール
２ｃ２ ふるい機
２ｃ４ 攪拌器
３ 分級機（分級手段）
４ 分離機（分離手段）
５ 微粉砕機（微粉砕手段）
５ａ 荒粉砕部
５ａ１１ 固定刃
５ａ１２ 荒粉砕ロール
５ｂ 中粉砕部
５ｂ１１ 固定刃
５ｂ１２ 中粉砕ロール
５ｃ 仕上げ粉砕部
５ｃ１１ 固定刃
５ｃ１２ 仕上げ粉砕ロール
６ 回収部 1 Pre-grinding machine (pre-grinding means)
2 Fine grinding machine (fine grinding means)
2a Rough grinding part 2a11, 2a12 Rough grinding roll 2a2 Sieve machine 2a4 Stirrer 2b Medium grinding part 2b11, 2b12 Medium grinding roll 2b2 Sieve machine 2b4 Stirrer 2c Finish grinding part 2c11, 2c12 Finishing grinding roll 2c2 Sieve machine 2c4 Stirrer 3 Classification Machine (classification means)
4 Separator (separation means)
5 Fine grinding machine (fine grinding means)
5a Rough crushing part 5a11 Fixed blade 5a12 Rough crushing roll 5b Medium crushing part 5b11 Fixed blade 5b12 Medium crushing roll 5c Finish crushing part 5c11 Fixed blade 5c12 Finish crushing roll 6 Recovery part

Claims (9)

不要なゴムからチップ状に処理されたゴム原材料を微粉砕手段によって固着防止剤を添加しながら荒粉砕、中粉砕及び仕上げ粉砕によって荒粉砕ゴムから中粉砕ゴムを経て微粉砕ゴムに順次仕上げて行く微粉砕工程と、
上記微粉砕ゴムを分級して少なくともその一部を微粉末ゴム製品として回収する分級回収工程と
を具備していることを特徴とする微粉砕ゴムの製法。 Rubber raw material processed into chips from unnecessary rubber is gradually finished from coarsely crushed rubber to medium crushed rubber to finely pulverized rubber by rough pulverization, medium pulverization and finish pulverization while adding anti-sticking agent by fine pulverization means. A fine grinding process;
And a classifying and collecting step of classifying the finely pulverized rubber and recovering at least a part thereof as a finely powdered rubber product. 微粉砕工程では、微粉砕手段として対の荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールを配置しているロール粉砕手段を用いて、各段階における対の粉砕ロール間で荒粉砕・中粉砕・仕上げ粉砕することを特徴とする請求項１記載の微粉砕ゴムの製法。 In the fine pulverization process, a pair of coarse pulverization rolls, medium pulverization rolls and finish pulverization rolls are used as fine pulverization means. The method for producing a finely pulverized rubber according to claim 1, wherein the pulverized rubber is pulverized. 微粉砕工程では、微粉砕手段として対の荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールを配置しかつ上記各粉砕ロールはその外周面が凹凸面に形成されているロール粉砕手段を用いて、各段階における対の粉砕ロール間で荒粉砕・中粉砕・仕上げ粉砕することを特徴とする請求項１記載の微粉砕ゴムの製法。 In the fine pulverization step, a pair of coarse pulverization rolls, medium pulverization rolls and finish pulverization rolls are arranged as fine pulverization means, and each of the pulverization rolls is formed by using roll pulverization means whose outer peripheral surface is formed in an uneven surface. 2. The method for producing finely pulverized rubber according to claim 1, wherein rough pulverization, intermediate pulverization, and finish pulverization are performed between a pair of pulverizing rolls in a stage. 微粉砕工程では、微粉砕手段として対の荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールを配置しかつ上記各粉砕ロールはその外周面が溝によって凹凸面に形成されているロール粉砕手段を用いて、各段階における対の粉砕ロール間で荒粉砕・中粉砕・仕上げ粉砕するものであり、荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールのそれぞれの溝形状が♯５〜♯２０、♯１０〜♯３０及び♯１５〜♯４０であることを特徴とする請求項１記載の微粉砕ゴムの製法。 In the fine pulverization step, a pair of coarse pulverization roll, medium pulverization roll, and finish pulverization roll are arranged as fine pulverization means, and each of the pulverization rolls uses a roll pulverization means whose outer peripheral surface is formed into an uneven surface by a groove. , Rough pulverization / medium pulverization / finish pulverization between a pair of pulverization rolls in each stage, and the groove shapes of the coarse pulverization roll, the medium pulverization roll, and the finish pulverization roll are # 5 to # 20, # 10 to ##, respectively. The method for producing a finely pulverized rubber according to claim 1, which is 30 and # 15 to # 40. 微粉砕工程では、微粉砕手段として対の荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールを配置しかつ上記各粉砕ロールはその外周面が溝によって凹凸面に形成されているロール粉砕手段を用いて、各段階における対の粉砕ロール間で荒粉砕・中粉砕・仕上げ粉砕するものであり、荒粉砕ロール、中粉砕ロール及び仕上げ粉砕ロールのそれぞれが対向する粉砕ロールの表面速度差比率がいずれも１／４０〜１／５であることを特徴とする請求項１又は請求項４記載の微粉砕ゴムの製法。 In the fine pulverization step, a pair of coarse pulverization roll, medium pulverization roll, and finish pulverization roll are arranged as fine pulverization means, and each of the pulverization rolls uses a roll pulverization means whose outer peripheral surface is formed into an uneven surface by a groove. In each stage, rough pulverization / medium pulverization / finish pulverization is performed between a pair of pulverization rolls. The method for producing a finely pulverized rubber according to claim 1 or 4, wherein the ratio is / 40 to 1/5. 微粉砕工程では、微粉砕手段として固定刃と粉砕ロールとを用いて、各段階における固定刃と粉砕ロールとの間で荒粉砕・中粉砕・仕上げ粉砕をするものであることを特徴とする請求項１記載の微粉砕ゴムの製法。 In the fine pulverization step, a fixed blade and a pulverization roll are used as fine pulverization means, and rough pulverization / medium pulverization / finish pulverization is performed between the fixed blade and the pulverization roll in each stage. Item 2. A method for producing finely pulverized rubber according to Item 1. ゴム原材料は、予備粉砕工程において予備粉砕手段によって細粉砕ゴムに処理されることを特徴とする請求項１乃至請求項６のいずれかに記載の微粉砕ゴムの製法。 The method for producing finely pulverized rubber according to any one of claims 1 to 6, wherein the rubber raw material is processed into finely pulverized rubber by a preliminary pulverizing means in a preliminary pulverizing step. 微粉砕工程に後続して分離工程を設け、この分離工程では微粉砕ゴム中に含まれかつ互いに連なっているゴムの粒体に対して衝撃力を付与して強制的に分離することを特徴とする請求項１乃至請求項７のいずれかに記載の微粉砕ゴムの製法。 A separation step is provided subsequent to the pulverization step, and in this separation step, an impact force is applied to the rubber particles contained in the pulverized rubber and connected to each other to forcibly separate. A process for producing a finely pulverized rubber according to any one of claims 1 to 7. ゴム原材料は、その大きさが１ｍｍ〜８ｍｍのゴムチップであることを特徴とする請求項１乃至請求項８のいずれかに記載の微粉砕ゴムの製法。 The method for producing finely pulverized rubber according to any one of claims 1 to 8, wherein the rubber raw material is a rubber chip having a size of 1 mm to 8 mm.
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Citations (5)

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JPS5342277A (en) * 1976-09-30 1978-04-17 Kinugawa Rubber Ind Method and apparatus for crushing rubber block
JPS5452154A (en) * 1977-10-03 1979-04-24 Nitto Electric Ind Co Ltd Preparation of polymer powder
JPH0979550A (en) * 1995-09-08 1997-03-28 Kobe Steel Ltd Operation method of high heat furnace using rubber based waste
JP2001315121A (en) * 2000-05-09 2001-11-13 Misawa Toyo Co Ltd Powder rubber and method of manufacturing the same
JP2006075711A (en) * 2004-09-09 2006-03-23 Bridgestone Corp Rubber composition and pneumatic tire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5342277A (en) * 1976-09-30 1978-04-17 Kinugawa Rubber Ind Method and apparatus for crushing rubber block
JPS5452154A (en) * 1977-10-03 1979-04-24 Nitto Electric Ind Co Ltd Preparation of polymer powder
JPH0979550A (en) * 1995-09-08 1997-03-28 Kobe Steel Ltd Operation method of high heat furnace using rubber based waste
JP2001315121A (en) * 2000-05-09 2001-11-13 Misawa Toyo Co Ltd Powder rubber and method of manufacturing the same
JP2006075711A (en) * 2004-09-09 2006-03-23 Bridgestone Corp Rubber composition and pneumatic tire

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