JPH0691650A - Manufacture of urethane foam powder - Google Patents

Manufacture of urethane foam powder

Info

Publication number
JPH0691650A
JPH0691650A JP26943492A JP26943492A JPH0691650A JP H0691650 A JPH0691650 A JP H0691650A JP 26943492 A JP26943492 A JP 26943492A JP 26943492 A JP26943492 A JP 26943492A JP H0691650 A JPH0691650 A JP H0691650A
Authority
JP
Japan
Prior art keywords
urethane foam
screw
soft urethane
powder
soft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP26943492A
Other languages
Japanese (ja)
Inventor
Naoshi Fujita
直志 藤田
Mitsuru Omoto
充 尾本
Akihiro Yamamoto
章浩 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inoac Corp
Original Assignee
Inoue MTP KK
Inoac Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inoue MTP KK, Inoac Corp filed Critical Inoue MTP KK
Priority to JP26943492A priority Critical patent/JPH0691650A/en
Publication of JPH0691650A publication Critical patent/JPH0691650A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • 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
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

PURPOSE:To provide a method capable of manufacturing fine urethane foam powder effectively from waste material of soft urethane foam. CONSTITUTION:A soft urethane foam F to be crushed is supplied between a surface of a screw 12 having a spiral groove 18 formed on its peripheral surface and an inner face of an outer casing 16 surrounding the screw 12. The soft urethane foam F is sequentially sent to the front of the screw 12 being rotated by the rotation of the screw 12. At this time, the foam F is crushed between the surface of the screw 12 and the inner face of the outer casing 16 so as to make powder.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、ウレタンフォーム粉末
の製造方法に関し、特には軟質ウレタンフォームの廃材
からウレタンフォーム粉末を製造するのに適した製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing urethane foam powder, and more particularly to a production method suitable for producing urethane foam powder from a waste material of soft urethane foam.

【０００２】[0002]

【従来の技術】スラブ発泡方式で軟質ウレタンフォーム
を製造する際、あるいは軟質ウレタンフォームを裁断に
よって所定形状にする際などには多量の廃材が発生す
る。そこで従来にあっては、軟質ウレタンフォームの廃
材を再利用すべく、該廃材から再生成形品を成形するこ
とがなされている。その再生成形品の成形は、前記軟質
ウレタンフォームの廃材を細かく粉砕し、該粉砕物を接
着剤とともに混合し、所定形状に圧縮して一体に接着す
る、いわゆる接着圧縮成形によって行われている。な
お、その際に細かい形状部分を有する再生成形品を得よ
うとすると、前記粉砕物を微細なものにする必要があっ
た。2. Description of the Related Art A large amount of waste material is generated when a flexible urethane foam is manufactured by a slab foaming method or when the flexible urethane foam is cut into a predetermined shape. Therefore, in the past, in order to reuse the waste material of the flexible urethane foam, a recycled molded product is formed from the waste material. The molding of the recycled molded product is performed by so-called adhesive compression molding in which the waste material of the soft urethane foam is finely crushed, the crushed product is mixed with an adhesive, and the mixture is compressed into a predetermined shape and integrally bonded. At this time, in order to obtain a regenerated molded product having a finely shaped portion, it was necessary to make the pulverized product fine.

【０００３】ところで、従来における前記ウレタンフォ
ームの粉砕方法として、外周表面にカギ状突起を多数設
けた回転円筒を、軟質ウレタンフォームの廃材表面に押
し当てながら回転させて、その回転円筒外周面のカギ状
突起により軟質ウレタンフォームの廃材表面を引っ掻い
て細かく引きちぎる方法がある。By the way, as a conventional method for pulverizing the urethane foam, a rotating cylinder having a large number of key-shaped projections on the outer peripheral surface is pressed against the waste material surface of the soft urethane foam to rotate, and the key on the outer peripheral surface of the rotating cylinder is obtained. There is a method of scratching the surface of the waste material of the flexible urethane foam by the projections and tearing it finely.

【０００４】しかし、前記の粉砕方法にあっては、微細
な粉砕物を得ようとして回転円筒表面のカギ状突起の間
隔を小さくしても、粉砕用軟質ウレタンフォームが自己
の柔軟性により変形してカギ状突起間を通り抜けてしま
い、期待するような微細な粉砕物が得られなかった。特
に大きさが約０．５mm以下の小さなウレタンフォーム粉
砕物を得るのは容易ではなかった。そのため、その粉砕
物を用いて前記の接着圧縮成形により再生成形品を成形
しようとしても細かい形状のものが得られなかった。However, in the above crushing method, even if the distance between the key-like projections on the surface of the rotating cylinder is reduced in order to obtain a fine crushed product, the soft urethane foam for crushing is deformed by its own flexibility. It passed through between the key-like protrusions, and the expected finely pulverized product could not be obtained. In particular, it was not easy to obtain a small urethane foam pulverized product having a size of about 0.5 mm or less. Therefore, even if an attempt was made to mold a regenerated molded product by the above-mentioned adhesive compression molding using the crushed product, a finely shaped product could not be obtained.

【０００５】また、前記の回転円筒による軟質ウレタン
フォームの粉砕方法にあっては、軟質ウレタンフォーム
自体が柔軟なために、カギ状突起による引っ掻き時に軟
質ウレタンフォームの表面が変形し易い。そのため、カ
ギ状突起により軟質ウレタンフォーム表面を均一に引っ
掻くことができず、得られる粉砕物の大きさが不均一に
ならざるを得なかった。その結果、その粉砕物を用いて
前記接着圧縮成形により再生成形品を成形しようとして
も、品質の一定したものが得られなかった。Further, in the crushing method of the soft urethane foam by the rotating cylinder, since the soft urethane foam itself is flexible, the surface of the soft urethane foam is easily deformed when scratched by the hook-shaped projections. Therefore, the surface of the soft urethane foam cannot be scratched uniformly by the hook-shaped projections, and the size of the obtained pulverized product must be nonuniform. As a result, even if an attempt was made to mold a remolded product by the adhesive compression molding using the crushed product, a product of constant quality could not be obtained.

【０００６】その他、軟質スラブウレタンフォームのよ
うに密度の高い硬い表皮部分を有するものに対して前記
の粉砕方法を用いると、硬い表皮部分から粉砕形成され
た硬い大きな粉砕物と、内側の密度の低い軟らかい部分
から形成された軟らかい比較的小さな粉砕物との混合粉
砕物しか得られなかった。そして、その粉砕物を用いて
前記再生成形品を成形しようとすると、硬さの異なる部
分が混在した、しかも形状変化がゆるやかな商品価値の
乏しい再生成形品しか成形できなかった。[0006] In addition, when the above-mentioned pulverization method is used for a soft slab urethane foam having a hard skin having a high density, a large crushed product formed by crushing from the hard skin and an inner density Only mixed grinds with soft, relatively small grinds formed from low soft parts were obtained. When an attempt is made to mold the regenerated molded product by using the crushed product, only a regenerated molded product having a mixture of parts with different hardness and a gradual shape change and poor commercial value can be formed.

【０００７】そのため、軟質スラブウレタンフォーム等
の廃材から商品価値の有る再生成形品を成形しようとす
ると、その廃材の大部分を占める硬い表皮部分をあらか
じめ除去する必要があり、作業に手間取るのみならず、
真に廃材の再利用にはならない問題があった。Therefore, when a recycled molded product having a commercial value is to be molded from a waste material such as a soft slab urethane foam, it is necessary to remove the hard skin portion, which occupies most of the waste material, in advance. ,
There was a problem that was not truly the recycling of waste materials.

【０００８】さらに、前記回転円筒を用いる粉砕方法か
ら得られる粉砕物については、その大きさが大であるた
め、主として前記の接着圧縮成形による再生成形品の成
形にその用途が限られていた。しかし、より小さな粉砕
物が得られれば用途が広がり、ますます廃物の再利用が
図られるため、より微細なウレタンフォーム粉末の製造
方法が求められていた。Further, since the crushed product obtained by the crushing method using the rotating cylinder is large in size, its use is limited mainly to the molding of the regenerated molded product by the above-mentioned adhesive compression molding. However, if a smaller pulverized product can be obtained, the application will be expanded and the waste will be reused more and more. Therefore, a method for producing a finer urethane foam powder has been required.

【０００９】なおその他、発泡合成樹脂から細かい粉砕
物を得る方法として、回転砥石に発泡合成樹脂を押し付
け研磨して粉砕する方法がある（特開昭５２−７４６７
７号公報）。しかし、その方法によってはわずかな量の
発泡合成樹脂しか一度に粉砕できないため、大量に発生
する軟質ウレタンフォーム廃材の処理に対しては適して
いなかった。さらにその粉砕方法は、得られる粉砕物の
量がきわめて少ないため、その粉砕物を工業的な用途に
利用する場合にも最適とは言いがたかった。In addition, as a method for obtaining a finely pulverized product from the foamed synthetic resin, there is a method in which the foamed synthetic resin is pressed against a rotary grindstone to be ground and crushed (JP-A-52-7467).
7 publication). However, depending on the method, only a small amount of foamed synthetic resin can be crushed at one time, and therefore it was not suitable for treating a large amount of waste soft urethane foam. Further, since the amount of the pulverized product obtained is extremely small, the pulverization method was not optimal even when the pulverized product was used for industrial purposes.

【００１０】[0010]

【発明が解決しようとする課題】そこで、本発明は前記
の問題点を解決して、軟質ウレタンフォームの廃材から
細かいウレタンフォーム粉末を効率よく得られる製造方
法を提供しようとするものである。SUMMARY OF THE INVENTION Therefore, the present invention is intended to solve the above problems and to provide a production method capable of efficiently obtaining fine urethane foam powder from a waste material of a flexible urethane foam.

【００１１】[0011]

【課題を解決するための手段】本発明は、外周表面にら
せん溝の形成されたスクリューの表面と該スクリューを
包囲する外筒の内面との間に粉砕用軟質ウレタンフォー
ムを供給し、該軟質ウレタンフォームを前記スクリュー
の回転によって回転させながらスクリュー前方へ順次送
り、その際前記スクリュー表面と外筒内面との間で粉砕
して粉末にすることを特徴とするウレタンフォーム粉末
の製造方法に係る。The present invention provides a soft urethane foam for grinding between the surface of a screw having a spiral groove formed on the outer peripheral surface and the inner surface of an outer cylinder surrounding the screw, and The present invention relates to a method for producing a urethane foam powder, characterized in that the urethane foam is sequentially fed to the front of the screw while being rotated by the rotation of the screw, and at that time, the powder is crushed into a powder between the screw surface and the inner surface of the outer cylinder.

【００１２】なお、前記スクリューは一つに限らず、回
転軸を同方向として並列する複数のもので構成してもよ
い。The number of screws is not limited to one, and a plurality of screws may be arranged in parallel with the rotating shafts in the same direction.

【００１３】[0013]

【作用】粉砕用軟質ウレタンフォームは、スクリューの
回転により回転しながらスクリューの表面と外筒内面間
を前方に送られる。その際、粉砕用軟質ウレタンフォー
ムは前記スクリュー表面のらせん溝谷部と山部および外
筒内面間、さらにはスクリューが複数の場合にはスクリ
ュー表面間でも擦られて、ねじ切られるようにして粉砕
される。すなわち粉砕用軟質ウレタンフォームはあらゆ
る方向に擦られて、それにより大なる剪断力が発生する
め、その剪断力により該粉砕用軟質ウレタンフォームが
きわめて細かい粉末に粉砕される。これに対し、らせん
溝のない単なる二つの回転円筒間で軟質ウレタンフォー
ムを粉砕する場合には、凹凸のない回転円筒表面間で擦
られるだけであるため、限られた方向に擦られることに
なって大なる剪断力が発生せず、粉砕用軟質ウレタンフ
ォームが細かく粉砕されなくなる。The soft urethane foam for crushing is sent forward between the surface of the screw and the inner surface of the outer cylinder while rotating by the rotation of the screw. At that time, the soft urethane foam for crushing is rubbed between the spiral groove troughs and peaks of the screw surface and the inner surface of the outer cylinder, and also between the screw surfaces when there are a plurality of screws, and crushed so as to be threaded. . That is, since the crushable soft urethane foam is rubbed in all directions, a large shearing force is generated, and the shearing force crushes the crushable soft urethane foam into an extremely fine powder. On the other hand, when soft urethane foam is crushed between only two rotating cylinders that do not have spiral grooves, it is rubbed only between the surfaces of the rotating cylinders that have no irregularities, so it is rubbed in a limited direction. As a result, a large shearing force is not generated, and the soft urethane foam for grinding is not finely ground.

【００１４】[0014]

【実施例】以下添付の図面に従ってこの発明を詳細に説
明する。図１は、この発明の製造方法の一実施例に用い
る装置の縦断面図、図２は他の実施例に用いる装置の横
断面図、図３は更に別の実施例に用いる装置の縦断面図
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a vertical sectional view of an apparatus used in one embodiment of the manufacturing method of the present invention, FIG. 2 is a horizontal sectional view of an apparatus used in another embodiment, and FIG. 3 is a vertical sectional view of an apparatus used in yet another embodiment. It is a figure.

【００１５】まず、図１に示す装置１０と、粉砕用軟質
ウレタンフォームＦについて説明する。装置１０は、ス
クリュー１２と、スクリュー回転用駆動装置１４と、外
筒１６とを有する。First, the apparatus 10 shown in FIG. 1 and the soft urethane foam F for grinding will be described. The device 10 includes a screw 12, a screw rotation driving device 14, and an outer cylinder 16.

【００１６】スクリュー１２は、外周表面にらせん溝１
８が形成されたもので、スクリュー表面と外筒１６内面
との間で粉砕用軟質ウレタンフォームを回転させながら
粉砕するためのものである。このスクリュー１２の後部
はチェーン２０を介してスクリュー回転用駆動装置１４
と連結され、その駆動装置１４によりスクリュー１２が
一方向に回転するようになっている。スクリュー１２の
ねじ長さＬと直径Ｄとの比Ｌ／Ｄは、通常１８〜２６の
範囲で選択される。スクリュー１２のらせん溝の深さ
は、通常数mm〜２０mmの範囲で選択され、スクリュー前
方ほど浅くなるようにするのが好ましい。また、スクリ
ュー１２の回転数は、通常数回転〜数百回転／分の範囲
で選択され、回転数が高くなるほど得られる粉末の粒径
が細かくなる。The screw 12 has a spiral groove 1 on the outer peripheral surface.
No. 8 is formed, and is for crushing while rotating the crushing soft urethane foam between the screw surface and the inner surface of the outer cylinder 16. The rear part of the screw 12 is provided with a drive device 14 for screw rotation via a chain 20.
The driving device 14 drives the screw 12 to rotate in one direction. The ratio L / D of the screw length L and the diameter D of the screw 12 is usually selected in the range of 18 to 26. The depth of the spiral groove of the screw 12 is usually selected in the range of several mm to 20 mm, and it is preferable that the depth becomes shallower toward the front of the screw. The rotation speed of the screw 12 is usually selected in the range of several rotations to several hundred rotations / minute, and the higher the rotation speed, the finer the particle size of the obtained powder.

【００１７】外筒１６は、前記スクリュー１２を回転可
能に収容して、外筒１６内面とスクリュー１２表面間で
粉砕用軟質ウレタンフォームＦを粉砕するためのもので
ある。The outer cylinder 16 is for rotatably accommodating the screw 12, and for crushing the crushable soft urethane foam F between the inner surface of the outer cylinder 16 and the surface of the screw 12.

【００１８】外筒１６の周壁２４には、粉砕用軟質ウレ
タンフォームＦの粉砕時に粉砕用軟質ウレタンフォーム
Ｆを冷却するための冷却水循環路２６が形成されてい
る。粉砕用軟質ウレタンフォームＦは、温度が低い程細
かく粉砕され、逆に温度が高い程粒径が大きくなるた
め、１５０℃以下、好ましくは１２０℃以下に冷却する
のが望ましい。これは、１２０℃程度になると粉砕用軟
質ウレタンフォームが軟化してベトツキ始め、ちぎれに
くくなることによる。もちろん、スクリューのらせん溝
の形状等によっては粉砕用軟質ウレタンフォームがそれ
ほど高温にならないこともあり、その場合には冷却は不
要である。On the peripheral wall 24 of the outer cylinder 16, there is formed a cooling water circulation passage 26 for cooling the crushing soft urethane foam F when the crushing soft urethane foam F is crushed. The soft urethane foam F for pulverization is finely pulverized as the temperature is lower, and the particle size is increased as the temperature is higher. Therefore, it is desirable to cool the soft urethane foam F to 150 ° C. or lower, preferably 120 ° C. or lower. This is because the soft urethane foam for grinding softens at a temperature of about 120 ° C. and begins to become sticky, making it difficult to tear. Of course, the soft urethane foam for crushing may not reach such a high temperature depending on the shape of the spiral groove of the screw, and in that case, cooling is unnecessary.

【００１９】また、外筒１６の先端には粉末回収用開口
部２８が形成され、他方後部には漏斗状の原料投入口２
２が形成されている。A powder recovery opening 28 is formed at the tip of the outer cylinder 16, while a funnel-shaped raw material inlet 2 is provided at the rear.
2 is formed.

【００２０】一方、前記装置１０を用いて粉砕される軟
質ウレタンフォームＦは、エーテル系、エステル系のい
ずれでもよいが、密度１６〜８０kg／ｍ3 、硬さ４〜５
０kg／３１４cm2 の範囲のものが好適である。また、そ
の粉砕用軟質ウレタンフォームＦは、棒状でもあるいは
ブロック状のものでもよい。On the other hand, the soft urethane foam F crushed using the apparatus 10 may be ether type or ester type, but has a density of 16 to 80 kg / m 3 and a hardness of 4 to 5
The range of 0 kg / 314 cm 2 is preferable. The crushable soft urethane foam F may be rod-shaped or block-shaped.

【００２１】前記装置１０を用いて行うウレタンフォー
ム粉末の製造は、次のようにして行う。まず、所定の大
きさの粉砕用軟質ウレタンフォームＦを原料投入口２２
に投入する。The production of urethane foam powder using the apparatus 10 is carried out as follows. First, a soft urethane foam F for grinding having a predetermined size is used as a raw material inlet 22.
Throw in.

【００２２】投入された粉砕用軟質ウレタンフォームＦ
は、スクリュー１２の回転によりスクリュー１２外周表
面を回転しながらスクリュー１２表面と外筒１６内面間
を前方へ進む。その際、粉砕用軟質ウレタンフォームＦ
は、冷却水循環路２６を通る冷却水によって外側から冷
却され、摩擦熱により加熱軟化するのが防止される。ス
クリュー１２表面と外筒１６内面間の狭い隙間を回転し
ながら前方へ進む粉砕用軟質ウレタンフォームＦには、
前記回転によって剪断力が働き、その剪断力により粉砕
用軟質ウレタンフォームＦが効率良く粉砕される。そし
てその粉砕用軟質ウレタンフォームＦは、スクリュー１
２および外筒１６間を前に行くほど細かく粉砕されて、
最終的にウレタンフォーム粉末ｆになる。そのウレタン
フォーム粉末ｆは、外筒１６先端の粉末回収用開口部２
８から回収される。Injected soft urethane foam F for grinding
Moves forward between the surface of the screw 12 and the inner surface of the outer cylinder 16 while rotating the outer peripheral surface of the screw 12 by the rotation of the screw 12. At that time, soft urethane foam F for grinding
Is cooled from the outside by the cooling water passing through the cooling water circulation path 26 and is prevented from being heated and softened by frictional heat. The crushing soft urethane foam F, which advances forward while rotating in a narrow gap between the surface of the screw 12 and the inner surface of the outer cylinder 16,
The rotation causes a shearing force, and the shearing force efficiently pulverizes the soft urethane foam F for pulverization. And the soft urethane foam F for grinding is screw 1
As it goes between 2 and the outer cylinder 16 toward the front, it is finely crushed,
Finally, urethane foam powder f is obtained. The urethane foam powder f is the powder recovery opening 2 at the tip of the outer cylinder 16.
Recovered from 8.

【００２３】次に、別の実施例の装置について説明す
る。図２に示す装置３０は、外周表面にらせん溝を有す
る前記スクリューが、並列する二つのスクリュー３２、
３４からなる２軸タイプのものである。二つのスクリュ
ー３２，３４の回転方向は、同方向であっても反対方向
であってもよい。またスクリューのＬ／Ｄは、５〜８程
度が好ましい。この装置３０にあっては、粉砕用軟質ウ
レタンフォームは、外筒３６と二つのスクリュー３２，
３４間で回転しながら粉砕される。図中３８は冷却水循
環路、４０は原料投入口である。Next, an apparatus of another embodiment will be described. The device 30 shown in FIG. 2 has two screws 32 in which the screws having a spiral groove on the outer peripheral surface are arranged in parallel.
It is a biaxial type consisting of 34. The two screws 32 and 34 may rotate in the same direction or in opposite directions. The L / D of the screw is preferably about 5-8. In this device 30, the soft urethane foam for grinding is composed of an outer cylinder 36, two screws 32,
It is crushed while rotating between 34. In the figure, 38 is a cooling water circulation path, and 40 is a raw material inlet.

【００２４】なお、本発明においてスクリューの本数は
一つまたは二つに限られるものではなく、二つより多い
多軸タイプのものでもよい。In the present invention, the number of screws is not limited to one or two, and a multi-screw type having more than two screws may be used.

【００２５】図３に示すさらに別の実施例の装置４２
は、外筒４４の内径およびスクリュー４６の外径が先端
になる程小さくなったものである。この装置４２にあっ
ては、粉砕用軟質ウレタンフォームＦが、スクリュー４
６の回転によってスクリュー４６と外筒４４間を前に送
られるにしたがい、より狭い空間に密に押し込まれるこ
とになる。その結果、粉砕用軟質ウレタンフォームＦが
スクリュー４６表面と外筒４２内面間で一層よりよく擦
られ、大なる剪断力により粉砕されて、より細かい粉末
になる。図中４８は冷却水用ジャケットである。なお、
この装置４２において、スクリュー４６を二以上の多軸
のものとしてもよい。A further embodiment device 42, shown in FIG.
Is such that the inner diameter of the outer cylinder 44 and the outer diameter of the screw 46 become smaller as the tip ends. In this device 42, the crushing soft urethane foam F is
As the screw 6 and the outer cylinder 44 are forwardly rotated by the rotation of 6, they are tightly pressed into a narrower space. As a result, the soft urethane foam F for crushing is rubbed between the surface of the screw 46 and the inner surface of the outer cylinder 42 better, and crushed by a large shearing force to obtain a finer powder. Reference numeral 48 in the figure denotes a cooling water jacket. In addition,
In this device 42, the screw 46 may be a multi-screw having two or more axes.

【００２６】以下に前記図１の装置１０を用いて行った
軟質ウレタンフォーム粉末の製造実施例について記す。An example of manufacturing the soft urethane foam powder, which was carried out by using the apparatus 10 shown in FIG. 1, will be described below.

【００２７】（実施例１）密度２５kg／ｍ3 、硬さ３６
kg／３１４cm2 、長さ２０〜５０cm、横断面の一辺１０
〜２０cmからなる軟質スラブウレタンフォームの廃材
を、粉砕用軟質ウレタンフォームＦとして前記装置１０
の原料投入口２２から外筒１６内に投入し粉砕した。装
置１０のスクリュー１２は、Ｌ／Ｄが２０、回転数が５
回転／分、らせん溝の深さがスクリュー後部で１５mm、
前部で６mmである。また冷却水循環路２６を通る冷却水
による粉砕用軟質ウレタンフォームの冷却温度は、５０
〜６０℃に設定した。得られた軟質ウレタンフォームの
粉砕物は、粒子径が０．１mm〜０．４mmの粉末状のもの
であった。(Example 1) Density 25 kg / m 3 , hardness 36
kg / 314cm 2 , length 20-50cm, side of cross section 10
The waste material of the soft slab urethane foam consisting of ˜20 cm is used as the soft urethane foam F for crushing in the above-mentioned apparatus 10.
The raw material was introduced into the outer cylinder 16 through the raw material inlet 22 and pulverized. The screw 12 of the device 10 has an L / D of 20 and a rotation speed of 5
Rotation / min, depth of spiral groove is 15mm at the rear of the screw,
6mm at the front. The cooling temperature of the soft urethane foam for crushing by the cooling water passing through the cooling water circulation path 26 is 50
It was set to -60 ° C. The pulverized product of the obtained soft urethane foam was in the form of powder having a particle size of 0.1 mm to 0.4 mm.

【００２８】（実施例２）スクリューの回転数を５０回
転／分とした点を除いて実施例１と同じ条件からなる装
置を用いて実施例１と同じ粉砕用軟質ウレタンフォーム
を粉砕した。得られた粉砕物は、粒子径が０．０５mm〜
０．２mmの粉末状のものであった。(Example 2) The same soft urethane foam for crushing as in Example 1 was crushed by using an apparatus having the same conditions as in Example 1 except that the rotation speed of the screw was 50 rpm. The obtained pulverized product has a particle size of 0.05 mm to
It was a powder of 0.2 mm.

【００２９】なお、前記実施例２で得られた粒子径０．
０５mm〜０．２mmのウレタンフォーム粉末を接着剤と混
合して、型内に充填して接着圧縮成形したところ、きわ
めて細かい形状部分を有する再生成形品が良好に成形で
きた。The particle size obtained in Example 2 was 0.
When urethane foam powder having a diameter of 05 mm to 0.2 mm was mixed with an adhesive, the mixture was filled in a mold and adhesive compression molding was performed, a remolded product having an extremely fine shape part could be favorably molded.

【００３０】また、前記実施例２で得られた粒子径０．
０５mm〜０．２mmのウレタンフォーム粉末を、充填剤と
して軟質ウレタンフォーム原料に添加して軟質ウレタン
フォームを発泡成形したところ、得られた軟質ウレタン
フォームの外観、物性および成形性は、ウレタンフォー
ム粉末未添加のものと殆ど変わらず、実用上問題となら
なかった。Further, the particle diameter of 0.
When a soft urethane foam raw material was foam-molded by adding a urethane foam powder of 05 mm to 0.2 mm as a filler to the soft urethane foam raw material, the appearance, physical properties and moldability of the obtained flexible urethane foam were It was almost the same as the added one and did not pose any practical problem.

【００３１】[0031]

【発明の効果】以上図示し説明したように、本発明は、
外周表面にらせん溝の形成されたスクリューの表面と外
筒の内面との間に粉砕用軟質ウレタンフォームを供給
し、その軟質ウレタンフォームを前記スクリューの回転
によって回転させながらスクリュー前方へ順次送り、そ
の際前記スクリュー表面と外筒内面との間で粉砕して粉
末にするため、粉砕用軟質ウレタンフォームには大なる
剪断力が加わり、柔軟な軟質ウレタンフォームをきわめ
て効率よく粉砕できる。そのため、従来では得られなか
った細かいウレタンフォーム粉末が得られる。しかも、
粉砕用軟質ウレタンフォームをスクリューの回転により
順次前へ送りながら粉砕するため、連続的に大量に粉砕
することができ、大量に発生する軟質ウレタンフォーム
廃物の処理にも適する。As shown and described above, the present invention is
The soft urethane foam for grinding is supplied between the surface of the screw in which the spiral groove is formed on the outer peripheral surface and the inner surface of the outer cylinder, and the soft urethane foam is sequentially fed to the front of the screw while being rotated by the rotation of the screw. At this time, since the powder is crushed between the screw surface and the inner surface of the outer cylinder, a great shearing force is applied to the crushing soft urethane foam, and the flexible soft urethane foam can be crushed extremely efficiently. Therefore, it is possible to obtain a fine urethane foam powder which has not been obtained in the past. Moreover,
Since the soft urethane foam for crushing is crushed while being sequentially fed forward by the rotation of the screw, it can be continuously crushed in a large amount, and is suitable for treating a large amount of soft urethane foam waste.

【００３２】さらに、本発明の実施により得られる軟質
ウレタンフォーム粉末は、従来の粉砕方法によって得ら
れる粉砕物よりも粒径が小さいため、接着圧縮成形によ
り再生成形品を成形するに際しても、細かい形状のもの
を成形することができる。加えて、接着圧縮成形に限ら
れず軟質ウレタンフォームの充填材、その他の用途にも
使用できるため、より幅広い工業的用途がある。したが
って本発明によれば、軟質ウレタンフォームのリサイク
ルを可能にすることができる。Furthermore, since the soft urethane foam powder obtained by carrying out the present invention has a smaller particle size than the crushed product obtained by the conventional crushing method, it is possible to obtain a fine shape even when the regenerated molded product is molded by adhesive compression molding. Can be molded. In addition, since it can be used not only for adhesive compression molding but also for a filler of soft urethane foam and other uses, it has a wider industrial use. Therefore, according to the present invention, the flexible urethane foam can be recycled.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明に用いられる装置の一実施例の縦断面図
である。FIG. 1 is a vertical sectional view of an embodiment of an apparatus used in the present invention.

【図２】本発明に用いられる装置の他の実施例の横断面
図である。FIG. 2 is a cross-sectional view of another embodiment of the device used in the present invention.

【図３】本発明に用いられる装置のさらに別の実施例の
縦断面図である。FIG. 3 is a vertical cross-sectional view of yet another embodiment of the device used in the present invention.

【符号の説明】[Explanation of symbols]

１２ スクリュー １４ スクリュー回転用駆動装置 １６ 外筒 １８ らせん溝 ２２ 原料投入口 ２６ 冷却水循環路 ２８ 粉末回収用開口部 Ｆ 粉砕用軟質ウレタンフォーム ｆ ウレタンフォーム粉末 12 screw 14 screw rotation drive device 16 outer cylinder 18 spiral groove 22 raw material inlet 26 cooling water circulation passage 28 powder recovery opening F soft urethane foam for grinding f urethane foam powder

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 外周表面にらせん溝の形成されたスクリ
ューの表面と該スクリューを包囲する外筒の内面との間
に粉砕用軟質ウレタンフォームを供給し、該軟質ウレタ
ンフォームを前記スクリューの回転によって回転させな
がらスクリュー前方へ順次送り、その際前記スクリュー
表面と外筒内面との間で粉砕して粉末にすることを特徴
とするウレタンフォーム粉末の製造方法。1. A soft urethane foam for grinding is supplied between the surface of a screw having a spiral groove formed on its outer peripheral surface and the inner surface of an outer cylinder surrounding the screw, and the soft urethane foam is rotated by the rotation of the screw. A method for producing a urethane foam powder, characterized in that it is sequentially fed to the front of the screw while being rotated, and at that time, the powder is pulverized between the screw surface and the inner surface of the outer cylinder. 【請求項２】 請求項１において、スクリューが並列す
る複数からなり、該スクリュー表面と外筒間に供給した
粉砕用軟質ウレタンフォームを、前記スクリューの回転
によって回転させながらスクリュー前方へ順次送り、そ
の際前記スクリュー表面間および該スクリュー表面と前
記外筒内面間で粉砕して粉末にすることを特徴とするウ
レタンフォーム粉末の製造方法。2. The flexible urethane foam for grinding according to claim 1, comprising a plurality of screws arranged in parallel, the soft urethane foam for crushing being supplied between the screw surface and the outer cylinder being sequentially fed forward while being rotated by the rotation of the screw. At this time, a method for producing a urethane foam powder, which comprises pulverizing powder between the screw surfaces and between the screw surface and the inner surface of the outer cylinder. 【請求項３】 請求項１または２において、粉砕用軟質
ウレタンフォームを冷却しながら粉砕することを特徴と
するウレタンフォーム粉末の製造方法。3. The method for producing a urethane foam powder according to claim 1, wherein the soft urethane foam for grinding is ground while being cooled. 【請求項４】 請求項１ないし３のいずれかにおいて、
外筒およびスクリューが先端に至る程径の小さくなって
いることを特徴とするウレタンフォーム粉末の製造方
法。4. The method according to any one of claims 1 to 3,
A method for producing a urethane foam powder, characterized in that the outer cylinder and the screw have a diameter that decreases toward the tip.
JP26943492A 1992-09-11 1992-09-11 Manufacture of urethane foam powder Pending JPH0691650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26943492A JPH0691650A (en) 1992-09-11 1992-09-11 Manufacture of urethane foam powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26943492A JPH0691650A (en) 1992-09-11 1992-09-11 Manufacture of urethane foam powder

Publications (1)

Publication Number Publication Date
JPH0691650A true JPH0691650A (en) 1994-04-05

Family

ID=17472385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26943492A Pending JPH0691650A (en) 1992-09-11 1992-09-11 Manufacture of urethane foam powder

Country Status (1)

Country Link
JP (1) JPH0691650A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11320558A (en) * 1998-03-18 1999-11-24 Idemitsu Petrochem Co Ltd Method for crushing thermosetting resin
JP2000185321A (en) * 1998-10-15 2000-07-04 Idemitsu Petrochem Co Ltd Fine polyurethane powder, resin composition blended with this powder, material for leatherlike article and high-frequency welder fabrication material
JP2019077177A (en) * 2017-10-20 2019-05-23 株式会社関商店 Processing method soft urethane waste, manufacturing method of solid fuel, solid fuel, and twin-shaft crusher

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11320558A (en) * 1998-03-18 1999-11-24 Idemitsu Petrochem Co Ltd Method for crushing thermosetting resin
JP2000185321A (en) * 1998-10-15 2000-07-04 Idemitsu Petrochem Co Ltd Fine polyurethane powder, resin composition blended with this powder, material for leatherlike article and high-frequency welder fabrication material
JP2019077177A (en) * 2017-10-20 2019-05-23 株式会社関商店 Processing method soft urethane waste, manufacturing method of solid fuel, solid fuel, and twin-shaft crusher

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