JP4374354B2 - Plastic waste material recycling mixing equipment - Google Patents

Plastic waste material recycling mixing equipment Download PDF

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JP4374354B2
JP4374354B2 JP2006154459A JP2006154459A JP4374354B2 JP 4374354 B2 JP4374354 B2 JP 4374354B2 JP 2006154459 A JP2006154459 A JP 2006154459A JP 2006154459 A JP2006154459 A JP 2006154459A JP 4374354 B2 JP4374354 B2 JP 4374354B2
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rotating shaft
chamber
plastic waste
waste material
blades
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JP2006289990A (en
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武千代 小林
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株式会社コーハン
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/94—Liquid charges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
    • B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
    • B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
    • B29B7/14—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22—Component parts, details or accessories; Auxiliary operations
    • B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Description

本発明はプラスチックを主体とする廃材を再利用するためのプラスチック廃材再生用ミキシング装置に関するものである。   The present invention relates to a plastic waste material recycling mixing device for reusing waste material mainly composed of plastic.

使用済のプラスチック製包装用容器、或いは廃車のバンパー，バッテリーケース、その他のプラスチック製品から生じる大量のプラスチック廃材は、ポリ塩化ビニル，ポリエチレン，ポリプロピレン，ナイロン，アクリロニトリル，ポリスチレン，ポリアミド，ポリエステル，ウレタン，エポキシ，フェノール等の熱可塑性または熱硬化性の種々のプラスチック材料、或いはこれらの共重合樹脂が混在し、さらにこれに金属片，木片，ガラス片，繊維屑等の來雑物が混じったものとなる。従来このようなプラスチック廃材は、各材料毎に溶融温度がまちまちであるので、例えば周知の射出成形機に供給してリサイクル成形品を成形するのは困難であった。従って材料毎に分別しない限りリサイクルは不可能とされていた。しかし分別のためには高度な分離技術が要求されるとともにそのコストが高くつくために、従来ではこのようなプラスチック廃材は大部分が産業廃棄物として処分場に投棄されている状況である。また、このようなプラスチック廃材は焼却処分するにしても強い臭気の有害ガスが発生し大気を汚染するという問題がある。   Large amounts of plastic waste from used plastic packaging containers or scrap car bumpers, battery cases, and other plastic products are polyvinyl chloride, polyethylene, polypropylene, nylon, acrylonitrile, polystyrene, polyamide, polyester, urethane, epoxy. , Various thermoplastic or thermosetting plastic materials such as phenol, or copolymer resins of these materials are mixed, and metal, wood pieces, glass pieces, fiber scraps, and other contaminants are mixed. . Conventionally, since such plastic waste materials have different melting temperatures for each material, it has been difficult to supply a plastic injection material to, for example, a known injection molding machine to form a recycled molded product. Therefore, it was considered impossible to recycle unless sorted by material. However, since a high level of separation technology is required for separation and the cost is high, conventionally, most of such plastic waste materials are dumped in a disposal site as industrial waste. In addition, even when such plastic waste is incinerated, there is a problem that harmful gases with a strong odor are generated and the atmosphere is polluted.

そこで本発明は、種々のプラスチック材料が混在したプラスチック廃材でも分別を要さずそのまま再利用できるようにするためのプラスチック廃材再生用ミキシング装置およびその稼動方法を提供し、プラスチック廃材のリサイクルを促進することにより上記問題点を解決しようとするものである。   Therefore, the present invention provides a plastic waste material recycling mixing apparatus and a method for operating the plastic waste material so that the plastic waste material in which various plastic materials are mixed can be reused as it is without separation, and promotes recycling of the plastic waste material. This is to solve the above problems.

そのために本発明は、中空状の回転軸を軸受によりチャンバ中を貫通するように支持し、該回転軸の一端をモータに連結し、該回転軸の他端から該回転軸中に冷却媒体を循環させることで該回転軸の外周に突設された複数枚の羽根を冷却すると共に、チャンバ壁中に冷却媒体を循環させることにより該チャンバを冷却し、前記複数枚の羽根のうちの両端部の二つの羽根は該回転軸を回転させたときその前縁がチャンバの両端壁の内面と殆んど隙間なく摺接するように該回転軸の円周方向を基準として約１５度の角度で傾斜して回転軸の外周面に固着され、中間部の複数枚の羽根は該回転軸の外周面に千鳥状に固着され、該回転軸の円周方向の一定角度間隔の部位における軸方向において対向する少なくとも二つの羽根の互いの対向間隔が回転下流方向に向けて狭まるように該各羽根が該回転軸の円周方向を基準として約１５度の角度で捻って設けられ、前記モータにより該回転軸を高速回転させることで該チャンバ内に装填されたプラスチック廃材が該各羽根に当たって該チャンバの中心向に案内されるよう撹拌され、その撹拌に伴なう摩擦熱により該プラスチック廃材が溶融し、ゲル状態のプラスチック廃材が前記冷却により羽根およびチャンバの内面に粘着するのが防がれるようにしたことを特徴とする。 For this purpose, the present invention supports a hollow rotating shaft so as to pass through the chamber by a bearing, connects one end of the rotating shaft to a motor, and supplies a cooling medium from the other end of the rotating shaft into the rotating shaft. The plurality of blades projecting from the outer periphery of the rotating shaft are cooled by circulation, and the chamber is cooled by circulating a cooling medium in the chamber wall, and both end portions of the plurality of blades are cooled. These two blades are inclined at an angle of about 15 degrees with respect to the circumferential direction of the rotating shaft so that the leading edge of the rotating blade is in sliding contact with the inner surfaces of both end walls of the chamber with almost no gap when the rotating shaft is rotated. Are fixed to the outer peripheral surface of the rotating shaft, and the plurality of intermediate blades are fixed in a staggered manner to the outer peripheral surface of the rotating shaft, and are opposed in the axial direction at a constant angular interval in the circumferential direction of the rotating shaft. The at least two blades facing each other rotate Flow respective blade so narrowed toward the direction is provided by twisting at an angle of about 15 degrees relative to the circumferential direction of the rotary shaft, mounted in the chamber by causing high speed rotation of the said rotary shaft by said motor The plastic waste material is agitated so as to be guided toward the center of the chamber by hitting each blade, the plastic waste material is melted by frictional heat accompanying the stirring, and the plastic waste material in a gel state is cooled by the cooling to the blade and the chamber. It is characterized in that it can be prevented from sticking to the inner surface of.

本発明のプラスチック廃材再生用ミキシング装置によれば、プラスチック廃材を撹拌に伴う摩擦熱により適度なゲル状態に溶融させ異種のプラスチック材料を渾然一体のものとすることができる。このため分別を要することなくプラスチック廃材をそのままリサイクルでき、従来のプラスチック廃材の処理問題が解決されるうえ、資源を有効利用できるなど誠に有益な効果がある。   According to the mixing apparatus for recycling plastic waste material of the present invention, the plastic waste material can be melted into an appropriate gel state by frictional heat accompanying agitation, so that different plastic materials can be integrated into one. For this reason, plastic waste can be recycled as it is without separation, so that the problem of processing of conventional plastic waste can be solved, and resources can be effectively used.

次に本発明の実施の形態を図面と共に説明する。図１に本発明に係るミキシング装置を示す。このミキシング装置１は、機台２上に横向円筒形のチャンバ３を形成し、軸受４，４により水平に支持された回転軸５を該チャンバ３の中心に貫挿し、該回転軸５の一端を継手６を介してモータ７と連結している。回転軸５は中空状のものでその他端にロータリージョイト８，カップリング９が設けられ、該ロータリージョイト８を通して冷却水を該回転軸５の内部中心に設けられた給水パイプ１０に供給し、その冷却水を該回転軸５中を往復させてカップリング９より排出させるように構成している。   Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a mixing apparatus according to the present invention. The mixing apparatus 1 includes a horizontal cylindrical chamber 3 formed on a machine base 2, and a rotary shaft 5 supported horizontally by bearings 4, 4 is inserted into the center of the chamber 3, and one end of the rotary shaft 5 is inserted. Is connected to the motor 7 via the joint 6. The rotary shaft 5 has a hollow shape and is provided with a rotary joint 8 and a coupling 9 at the other end. Through the rotary joint 8, cooling water is supplied to a water supply pipe 10 provided at the inner center of the rotary shaft 5. The cooling water is reciprocated in the rotary shaft 5 and discharged from the coupling 9.

チャンバ３中を貫通する回転軸５の外周には図２〜図４に示したように合計６枚の羽根１１ａ〜１１ｆが突設されている。そのうちの両端部の羽根１１ａおよび１１ｆは矢印にて示した方向に回転したときその前縁がチャンバ３の両端壁１２，１２の内面と殆んど隙間なく摺接するように約１５度の角度で傾斜して回転軸５の外周面に固着されている。また中間部の４枚の羽根１１ｂ，１１ｃ，１１ｄ，１１ｅは回転軸５の外周面に千鳥状に固着され、各羽根の先方部は回転時の前縁が該チャンバ３の端を向く方向に夫々約１５度の角度で捻られている。 As shown in FIGS. 2 to 4, a total of six blades 11 a to 11 f protrude from the outer periphery of the rotating shaft 5 penetrating through the chamber 3. The blades 11a and 11f at both ends of the blades 11a and 11f are rotated at an angle of about 15 degrees so that the leading edges thereof are in sliding contact with the inner surfaces of both end walls 12 and 12 of the chamber 3 with almost no gap when rotated in the direction indicated by the arrows. Inclined and fixed to the outer peripheral surface of the rotary shaft 5. Further, the four blades 11b, 11c, 11d, and 11e in the intermediate portion are fixed in a staggered manner on the outer peripheral surface of the rotating shaft 5, and the leading edge of each blade is in a direction in which the leading edge during rotation faces the end of the chamber 3. It is twisted at an angle of each of about 15 degrees.

また、１２は該チャンバ３の一方の端壁に開設された材料供給口、１３は回転軸５の外周に形成された螺旋状の材料供給スクリュー、１４は該供給スクリュー１３を包囲している材料供給箱、１５は該供給箱の上方に設けられたホッパーで、該ホッパーには気密に閉止し得る蓋１６が設けられる。また、１７，１７は回転軸５に固設されたバランスホイールである。   Further, 12 is a material supply port provided in one end wall of the chamber 3, 13 is a spiral material supply screw formed on the outer periphery of the rotating shaft 5, and 14 is a material surrounding the supply screw 13. A supply box 15 is a hopper provided above the supply box. The hopper is provided with a lid 16 that can be hermetically closed. Reference numerals 17 and 17 denote balance wheels fixed to the rotary shaft 5.

チャンバ３の周壁中には通水路１８が形成され、該通水路１８に連通する給水管１９および排水管２０を配設し、該通水路１８に冷却水を循環させることにより該チャンバ３壁を冷却し得るようにしている。また、２６は光学式温度計、２１は該チャンバ３の周壁の一部に設けられた光学式温度計の測定ヘッドで、該測定ヘッド２１と光学式温度計２６とは接続ケーブルを介して連結されている。２２は該測定ヘッド２１を過熱から防ぐために周囲に給水管２３，排水管２４を通して冷却水が通水されるように設けられた通水路である。２５は光学式温度計２６により計測された温度を表示するデジタルパネルメータである。このように測定ヘッド２１に冷却水を通水し過熱を防ぐことにより受光面への樹脂の粘着を防ぎ測定温度の正確性を期すことができる。   A water passage 18 is formed in the peripheral wall of the chamber 3, a water supply pipe 19 and a drain pipe 20 communicating with the water passage 18 are disposed, and the cooling water is circulated through the water passage 18 so that the wall of the chamber 3 is formed. It can be cooled. Reference numeral 26 denotes an optical thermometer, and 21 denotes an optical thermometer measuring head provided on a part of the peripheral wall of the chamber 3. The measuring head 21 and the optical thermometer 26 are connected via a connection cable. Has been. Reference numeral 22 denotes a water passage provided so that cooling water is passed through a water supply pipe 23 and a drain pipe 24 in order to prevent the measurement head 21 from overheating. Reference numeral 25 denotes a digital panel meter that displays the temperature measured by the optical thermometer 26. Thus, by passing cooling water through the measurement head 21 to prevent overheating, the resin can be prevented from sticking to the light receiving surface, and the accuracy of the measurement temperature can be expected.

また、２７はチャンバ３の底壁部に設けられたゲル排出ドアで、該ドア２７は軸２８により回転可能に支持され該軸２８に設けられたギヤ２９がラック３０に噛合し、該ラック３０をシリンダ３２の作動により進退動させることで該軸２８が回転しドア２７を開閉できるように構成している。３１は該ドア２７の直下に配置されたゲル受用のトレイである。   Reference numeral 27 denotes a gel discharge door provided on the bottom wall portion of the chamber 3. The door 27 is rotatably supported by a shaft 28, and a gear 29 provided on the shaft 28 meshes with the rack 30. By moving the cylinder 28 forward and backward by the operation of the cylinder 32, the shaft 28 rotates and the door 27 can be opened and closed. Reference numeral 31 denotes a gel receiving tray disposed immediately below the door 27.

また、チャンバ３の一側壁にガス抜の配管３３が接続され、該配管３３は真空排ガス装置３４に配設されている。
また、４０は制御盤で、該制御盤４０にはモータ７の回転数をコントロールするインバータが接続されていると共に、モータ７の負荷電流を測定する電流計，およびタイマーを具備し、前記シリンダ３２に指令を出してドア２７を開閉できるようにしている。 Further, a gas vent pipe 33 is connected to one side wall of the chamber 3, and the pipe 33 is disposed in the vacuum exhaust gas device 34.
Reference numeral 40 denotes a control panel. The control panel 40 is connected to an inverter for controlling the rotational speed of the motor 7, and includes an ammeter for measuring the load current of the motor 7 and a timer. The door 27 can be opened and closed by issuing a command to

このように構成したミキシング装置１では、回転軸５内およびチャンバ３壁に夫々冷却水を循環させ、モータ７により該回転軸５を介して羽根１１ａ〜１１ｆを高速回転させる。例えば羽根１１ａ〜１１ｆの先端速度が２０〜５０ｍ／ｓ程度まで上昇し得るように高速回転させる。そして予め一定の大きさのチップ状，粒状等に粉砕されたプラスチック廃材をホッパー１５に投入し、供給スクリュー１３のガイドにより該プラスチック廃材を材料供給口１２よりチャンバ３中に供給し、羽根１１ａ〜１１ｆよりこれを撹拌する。   In the mixing apparatus 1 configured as described above, cooling water is circulated in the rotating shaft 5 and the wall of the chamber 3, and the blades 11 a to 11 f are rotated at high speed via the rotating shaft 5 by the motor 7. For example, the blades 11a to 11f are rotated at a high speed so that the tip speed of the blades 11a to 11f can be increased to about 20 to 50 m / s. Then, plastic waste material crushed into chips, granules, etc. of a certain size in advance is put into the hopper 15, and the plastic waste material is supplied into the chamber 3 from the material supply port 12 by the guide of the supply screw 13, and the blades 11a to 11 This is stirred from 11f.

図５はポリプロピレン５０％，アクリロニトリル・エチレンプロピレンゴム・スチレン共重合樹脂５０％の組成からなるプラスチック廃材をチャンバ３中に充填し上記のように撹拌した際の光学式温度計２６にて測定されたチャンバ３内のプラスチック廃材の温度変化（符号Ａにて示す）と、そのときのモータ７の負荷電流の変化（符号Ｂにて示す）とを夫々横軸を時間軸としてチャートに表わしたものである。このようにチャンバ３内のプラスチック廃材は、撹拌されるに伴い摩擦熱が発生しその摩擦熱によって温度が徐々に上昇し、同図中の点ａにて示した時に適度な軟らかさのゲル状態に溶融する。また、該モータ７の負荷電流は、同図中の点ｂにてピークに達し、その後数秒間でプラスチック廃材の温度が適度なゲル状態となる。このようにモータ７の負荷電流がピークになる時点を検出することで、チャンバ３内のプラスチック廃材が溶融し始めたところであることを検知することができる。即ちプラスチック廃材の溶融が始まった頃は最も撹拌抵抗が上昇し負荷電流も同時期にピークに達する。このため制御盤４０にて負荷電流がピークアウトするのを検知してタイマーを作動させ数秒後（投入されたプラスチック廃材の量や組成等により多少タイマーの設定時間は異なる）にシリンダ３２を作動させドア２７を開かしめチャンバ３内のプラスチック廃材を排出させれば、プラスチック廃材を常に適度な軟らかさのゲル状態に溶融したところで排出することができる。このためこのような排出のタイミングを採ることにより次の成形工程における成形の都合上常に最適な軟らかさとなるように粘度を調整することができる。   FIG. 5 is measured with an optical thermometer 26 when a plastic waste material composed of 50% polypropylene and 50% acrylonitrile / ethylene propylene rubber / styrene copolymer resin is filled in the chamber 3 and stirred as described above. The temperature change of the plastic waste material in the chamber 3 (indicated by the symbol A) and the change in the load current of the motor 7 at that time (indicated by the symbol B) are respectively shown in a chart with the horizontal axis as the time axis. is there. As described above, the plastic waste material in the chamber 3 generates frictional heat as it is agitated, and the temperature gradually rises due to the frictional heat. When indicated by a point a in FIG. To melt. Further, the load current of the motor 7 reaches a peak at a point b in the figure, and the temperature of the plastic waste material becomes an appropriate gel state within a few seconds thereafter. By detecting the time point when the load current of the motor 7 reaches a peak in this way, it can be detected that the plastic waste material in the chamber 3 has started to melt. That is, when the plastic waste material starts melting, the agitation resistance increases most and the load current reaches its peak at the same time. For this reason, the control panel 40 detects that the load current peaks and operates the timer to operate the cylinder 32 a few seconds later (the timer setting time varies slightly depending on the amount and composition of the plastic waste thrown in). If the plastic waste material in the chamber 3 is discharged by opening the door 27, the plastic waste material can be discharged when it is always melted into a gel state with an appropriate softness. For this reason, by taking such a discharge timing, it is possible to adjust the viscosity so that the softness is always optimum for the convenience of molding in the next molding step.

なお羽根１１ａおよび１１ｆは、溶融したプラスチック廃材が両端壁内面に付着するのを防ぐ。また羽根１１ｂ〜１１ｅは、その傾斜によってプラスチック廃材をチャンバ３内の中心向にガイドするので、チャンバ３内で溶融したプラスチック廃材は分散することなく餅のような塊にすることができる。そしてチャンバ３壁は冷却水により冷却され、回転軸５および羽根１１ａ〜１１ｆは該回転軸５中を循環する冷却水により冷却されるので、溶融したプラスチック廃材との温度差が充分に保たれその粘着を防ぐことができる。従ってドア２７を開ければ、そのゲル状態のプラスチック廃材は難なく遠心力でトレイ３１上に排出される。   The blades 11a and 11f prevent the molten plastic waste material from adhering to the inner surfaces of both end walls. Further, since the blades 11b to 11e guide the plastic waste material toward the center in the chamber 3 by its inclination, the plastic waste material melted in the chamber 3 can be made into a lump-like lump without being dispersed. The wall of the chamber 3 is cooled by the cooling water, and the rotating shaft 5 and the blades 11a to 11f are cooled by the cooling water circulating in the rotating shaft 5, so that the temperature difference from the molten plastic waste is sufficiently maintained. Adhesion can be prevented. Therefore, if the door 27 is opened, the plastic waste material in the gel state is discharged onto the tray 31 by centrifugal force without difficulty.

こうして排出されたプラスチック廃材はその溶融状態にあるうちに加圧成形機、或いは押出成形機等の成形機（図示せず）に装填し、板状，棒状，粒状，チップ状，箱状等の所望の形状に成形し得る。このように撹拌の摩擦熱によって溶融したプラスチック廃材を再加熱することなく即座にそのまま次の成形機に装填することで、廃材中の種々のプラスチック材料を分離させることなく渾然一体のものとして成形品を成形することができる。このため種々のプラスチック材料が混っているにも拘らず強度，弾性等の物質的特性の優れた成形品を成形できる。
ちなみに上記組成のプラスチック廃材では、曲げ弾性率１７００ｋｇ・ｆ／ｃｍ２以上、曲げ強度３００ｋｇ・ｆ／ｃｍ２以上，引張強度１５０ｋｇ・ｆ／ｃｍ２以上の夫々高い特性を得ることができた。このため成形品の用途も新規の材料と損色なく非常に広範囲なものとなる。また、ここでリサイクルし得るプラスチック廃材は上記組成に限らず、自動車バンパー，自動車内装品，ペットボトル，発泡ウレタン容器，薬品容器，バッテリーケース等の種々の廃プラスチック製品を混合し、再製品化が可能となった。 The plastic waste discharged in this manner is loaded into a molding machine (not shown) such as a pressure molding machine or an extrusion molding machine while in the molten state, and is in the form of a plate, rod, granule, chip, box, etc. It can be formed into a desired shape. In this way, the plastic waste material melted by frictional heat of stirring is immediately loaded into the next molding machine as it is without being reheated, so that the various plastic materials in the waste material can be separated as a unitary product without separation. Can be molded. For this reason, although various plastic materials are mixed, it is possible to mold a molded product having excellent material properties such as strength and elasticity.
Incidentally, the plastic waste material having the above composition was able to obtain high properties such as a flexural modulus of 1700 kg · f / cm 2 or more, a bending strength of 300 kg · f / cm 2 or more, and a tensile strength of 150 kg · f / cm 2 or more. For this reason, the use of the molded product is also very wide without any damage from new materials. The plastic waste that can be recycled here is not limited to the above composition, but various plastic products such as automobile bumpers, automobile interior parts, PET bottles, urethane foam containers, chemical containers, and battery cases can be mixed and recycled. It has become possible.

そしてチャンバ３内のガスを配管３３を通して真空排ガス装置３４により吸引すれば、塩化ビニル等のプラスチック廃材が溶融するに伴い発生する有害ガスを外部に排出することができるので、工場内の作業環境を良好に保つことができる。また、ホッパー１５の蓋１６を気密に閉じてチャンバ３内を減圧することにより、撹拌に伴い溶融樹脂中に空気，ガス等が混入する割合を可及的に少くできるので、成形品の特性を向上させるのに一層望ましい。   If the gas in the chamber 3 is sucked by the vacuum exhaust gas device 34 through the pipe 33, harmful gas generated as plastic waste such as vinyl chloride melts can be discharged to the outside. Can keep good. Further, by closing the lid 16 of the hopper 15 in an airtight manner and reducing the pressure in the chamber 3, the ratio of air, gas, etc. mixed into the molten resin with stirring can be reduced as much as possible. More desirable to improve.

また、この実施形態では、チャンバ３，回転軸５，測定ヘッド２１に冷却水を通水するようにしたが、冷却オイル，冷却ガス，その他の冷却媒体を使用することもできる。   In this embodiment, cooling water is passed through the chamber 3, the rotating shaft 5, and the measuring head 21, but cooling oil, cooling gas, and other cooling media can also be used.

本発明に係るプラスチック廃材再生用ミキシング装置の縦断面図。The longitudinal cross-sectional view of the mixing apparatus for plastic waste material reproduction | regeneration which concerns on this invention. 図１のプラスチック廃材再生用ミキシング装置の羽根の拡大図。The enlarged view of the blade | wing of the mixing apparatus for plastic waste material reproduction | regeneration of FIG. 図２の平面図。The top view of FIG. 図２のＡ−Ａ線断面図。FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. プラスチック廃材の温度変化およびモータの負荷電流の変化を示した線図。The diagram which showed the temperature change of plastic waste material, and the change of the load current of a motor.

符号の説明Explanation of symbols

１ ミキシング装置
３ チャンバ
５ 回転軸
７ モータ
８ ロータリージョイト
９ カップリング
１０ 給水パイプ
１１ａ〜１１ｆ 羽根
１２ 材料供給口
１６ 蓋
１８ 通水路
２１ 測定ヘッド
２２ 通水路
２６ 光学式温度計
４０ 制御盤 DESCRIPTION OF SYMBOLS 1 Mixing device 3 Chamber 5 Rotating shaft 7 Motor 8 Rotary joint 9 Coupling 10 Water supply pipe 11a-11f Blade 12 Material supply port 16 Lid 18 Water passage 21 Measuring head 22 Water passage 26 Optical thermometer 40 Control board

Claims (1)

中空状の回転軸を軸受によりチャンバ中を貫通するように支持し、該回転軸の一端をモータに連結し、該回転軸の他端から該回転軸中に冷却媒体を循環させることで該回転軸の外周に突設された複数枚の羽根を冷却すると共に、チャンバ壁中に冷却媒体を循環させることにより該チャンバを冷却し、前記複数枚の羽根のうちの両端部の二つの羽根は該回転軸を回転させたときその前縁がチャンバの両端壁の内面と殆んど隙間なく摺接するように該回転軸の円周方向を基準として約１５度の角度で傾斜して回転軸の外周面に固着され、中間部の複数枚の羽根は該回転軸の外周面に千鳥状に固着され、該回転軸の円周方向の一定角度間隔の部位における軸方向において対向する少なくとも二つの羽根の互いの対向間隔が回転下流方向に向けて狭まるように該各羽根が該回転軸の円周方向を基準として約１５度の角度で捻って設けられ、前記モータにより該回転軸を高速回転させることで該チャンバ内に装填されたプラスチック廃材が該各羽根に当たって該チャンバの中心向に案内されるよう撹拌され、その撹拌に伴なう摩擦熱により該プラスチック廃材が溶融し、ゲル状態のプラスチック廃材が前記冷却により羽根およびチャンバの内面に粘着するのが防がれるようにしたことを特徴とするプラスチック廃材再生用ミキシング装置。 A hollow rotating shaft is supported by a bearing so as to pass through the chamber, one end of the rotating shaft is connected to a motor, and the cooling medium is circulated through the rotating shaft from the other end of the rotating shaft to rotate the rotating shaft. The plurality of blades protruding from the outer periphery of the shaft are cooled and the chamber is cooled by circulating a cooling medium in the chamber wall, and the two blades at both ends of the plurality of blades are When the rotating shaft is rotated, the outer periphery of the rotating shaft is inclined at an angle of about 15 degrees with respect to the circumferential direction of the rotating shaft so that the leading edge thereof is in sliding contact with the inner surfaces of both end walls of the chamber with almost no gap. A plurality of blades in the middle part are fixed in a staggered manner on the outer peripheral surface of the rotating shaft, and at least two blades facing each other in the axial direction at a constant angular interval in the circumferential direction of the rotating shaft. The distance between each other is narrowed toward the downstream direction of rotation. Respective vane is provided twist at an angle of about 15 degrees relative to the circumferential direction of the rotary shaft as said motor by plastic waste loaded into the chamber by causing high speed rotation of the said rotary shaft is the Each blade is stirred so as to be guided toward the center of the chamber, and the plastic waste material is melted by the frictional heat accompanying the stirring, and the plastic waste material in a gel state adheres to the inner surface of the blade and the chamber by the cooling. Mixing device for recycling plastic waste material, characterized in that it is prevented.
JP2006154459A 2006-06-02 2006-06-02 Plastic waste material recycling mixing equipment Expired - Fee Related JP4374354B2 (en)

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