JPH064245B2 - Manufacturing method of resin / rubber blend material - Google Patents
Manufacturing method of resin / rubber blend materialInfo
- Publication number
- JPH064245B2 JPH064245B2 JP60270100A JP27010085A JPH064245B2 JP H064245 B2 JPH064245 B2 JP H064245B2 JP 60270100 A JP60270100 A JP 60270100A JP 27010085 A JP27010085 A JP 27010085A JP H064245 B2 JPH064245 B2 JP H064245B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- resin
- raw material
- kneading
- screw
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
- B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fillers or of fibrous materials, e.g. short-fibre reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
- B29C48/2888—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules in thread form or in strip form, e.g. rubber strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、樹脂・ゴムブレンド材料を連続的に製造する
方法に関する。The present invention relates to a method for continuously producing a resin / rubber blend material.
＜従来の技術＞ 近年、樹脂とゴムをブレンドして、樹脂の耐衝撃性，柔
軟性，耐油性，耐薬品性，応力緩和性等を改良する検討
が活発に行なわれている。そしてこのための樹脂・ゴム
ブレンド材料の製造方法は、通常ニーダー，バンバリミ
キサー等の回分式混練機に、粉粒状の原料樹脂と塊状の
原料ゴムをそれぞれ所定量ずつ投入し混練して得た塊状
のブレンド材料を（そのままでは射出成形・押出成形に
使用できない）、さらに、造粒用押出機に投入してペレ
ット化して樹脂・ゴムブレンド材料を得ていた。<Prior Art> In recent years, studies have been actively conducted to improve the impact resistance, flexibility, oil resistance, chemical resistance, stress relaxation property, etc. of resins by blending resins and rubber. For this purpose, a resin / rubber blend material is usually produced by charging a batch-type kneader such as a kneader or Banbury mixer with a predetermined amount of powdered granular resin and a lump of raw rubber, and kneading them. The blended material of (which cannot be used for injection molding / extrusion molding as it is) was further put into an extruder for granulation and pelletized to obtain a resin / rubber blended material.
＜発明が解決しようとする問題点＞ しかし、上記樹脂・ゴムブレンド材料の製造方法は、回
分式であって連続式でないため、生産性が良好でなく、
しかも、上記造粒用押出機は、塊状の原料を、造粒用押
出機本体のスクリューに供給できるように、原料入口部
（フィード部）に二軸スクリューと温調機構を備えた特
殊なものである必要があった。<Problems to be Solved by the Invention> However, since the method for producing the resin / rubber blend material is a batch method and not a continuous method, the productivity is not good,
Moreover, the above-mentioned granulating extruder is a special one equipped with a twin screw and a temperature control mechanism at the raw material inlet (feed part) so that the lumpy raw material can be supplied to the screw of the granulating extruder main body. Had to be.
なお、塊状でない原料ゴムとして、練生地からの紐状
（リボン状を含む）のものがあり、これはスクリュー型
混練押出機にフイード（投入）可能であるが、紐の断面
積（厚み、幅）のバラツキが大きく、ブレンド比の一定
な樹脂・ゴムブレンド材料を連続的に製造する際の原料
としては不適とされ見過されてきた。As a raw rubber that is not lumpy, there is a cord-shaped (including ribbon-shaped) material from kneading dough, which can be fed into a screw-type kneading extruder, but the cross-sectional area (thickness, width) of the cord. Has been widely overlooked because it is unsuitable as a raw material when continuously producing a resin / rubber blend material having a constant blend ratio.
＜問題点を解決するための手段＞ 本発明者らは、上記問題点を解決すべく、今まで見過さ
れてきた紐状練生地からなる原料ゴムに着目して鋭意開
発に努力をした結果、下記構成の樹脂・ゴムブレンド材
料の製造方法に想到した。<Means for Solving Problems> In order to solve the above problems, the present inventors have focused their efforts on the raw material rubber made of a string-like kneaded dough, which has been overlooked up to now, and have made earnest efforts as a result. Invented a method for producing a resin / rubber blend material having the following constitution.
スクリュー型混練押出機の混練スクリューの原料入口部
に、原料樹脂を定量フィーダーを介して連続的に定量供
給すると同時に、紐状練生地からなる原料ゴムをゴム定
量押出機を介して連続的に定量供給して、前記混練スク
リューにより樹脂・ゴムの混練を行ないながら押し出さ
れたストランドを細断してペレット化することを特徴と
する。At the same time, the raw material resin is continuously supplied to the raw material inlet of the kneading screw of the screw type kneading extruder through the quantitative feeder, and at the same time, the raw material rubber made of the string-like kneading dough is continuously determined through the rubber quantitative extruder. It is characterized in that the extruded strands are chopped into pellets while the resin / rubber is kneaded by the kneading screw supplied.
＜実施例＞ 以下、本発明を実施例に基づいて説明するが、本発明
は、実施例に限定されることなく、本発明の技術的思想
を逸脱しない範囲内で種々の態様に及ぶものである。<Examples> Hereinafter, the present invention will be described based on examples, but the present invention is not limited to the examples and can be applied to various embodiments within the scope not departing from the technical idea of the present invention. is there.
第１〜４図は本発明の一実施例を示し、第１図は本発明
の方法に用いる設備の全体平面配置図、第２図は同じく
全体正面配置図、第３図は同じく要部斜視図、第４図は
同じく要部断面図である。1 to 4 show an embodiment of the present invention, FIG. 1 is an overall plan layout view of equipment used in the method of the present invention, FIG. 2 is an overall front layout view, and FIG. Similarly, FIG. 4 and FIG. 4 are cross-sectional views of main parts.
図例の如く、スクリュー型混練押出機（以下「混練押出
機」）１に対してゴム定量押出機１１が、その押出ヘッ
ド１２が混練押出機１に形成されている後述のゴム材料
導入口４に面するように配され、混練押出機１の押出方
向に直列して水槽２１及びペレタイザー２２が配された
設備を用いる。このとき、混練押出機１は、通常の樹脂
混練に用いる二軸スクリュー型で、原料ホッパ５と、混
練スクリューの原料供給部３との間に定量フィーダー６
を備え、さらに原料供給部３の上方に原料ゴム導入口４
が形成されているものを用いる。なお、原料ゴム導入口
４にはガイドローラ７が配されている。また、ゴム定量
押出機１１と、混練押出機１のゴム材料導入口４との間
に、回転速度可変のゴム引き取りローラ１６が配されて
いる。なお、定量フィーダー６及びゴム定量押出機１１
の各スクリューが変速機付モータで駆動され回転速度可
変となっている。As shown in the figure, a screw-type kneading extruder (hereinafter referred to as “kneading extruder”) 1 has a rubber quantitative extruder 11 and an extrusion head 12 formed on the kneading extruder 1, which will be described later. Is used so that the water tank 21 and the pelletizer 22 are arranged in series in the extrusion direction of the kneading extruder 1. At this time, the kneading extruder 1 is a twin-screw type used for ordinary resin kneading, and the quantitative feeder 6 is provided between the raw material hopper 5 and the raw material supply section 3 of the kneading screw.
And a raw material rubber introduction port 4 above the raw material supply unit 3.
Is used. A guide roller 7 is arranged in the raw rubber introduction port 4. Further, a rubber take-off roller 16 having a variable rotation speed is arranged between the rubber constant amount extruder 11 and the rubber material introduction port 4 of the kneading extruder 1. The quantitative feeder 6 and the rubber quantitative extruder 11
Each screw is driven by a motor with a transmission to make the rotation speed variable.
次に、上記設備を用いての樹脂・ゴムブレンド材料の製
造方法を説明する。Next, a method for producing a resin / rubber blend material using the above equipment will be described.
ペレット状又は粉末状の樹脂原料Ｐは、混練押出機の原
料ホッパ５に投入しておく。紐状（リボン状を含む）練
生地からなる原料ゴムＲは、ゴム定量押出機１１の原料
投入口１３に導入し、ゴム定量押出機１１を駆動させ
て、押出ヘッド１２からのゴム原料Ｒを引き取りローラ
１６に導き、さらに原料ゴム導入口４へ導いておく。こ
の状態で、混練押出機１及びそれに付設する定量フィー
ダー６、さらに前述のゴム定量押出機１１及び引き取り
ローラ１６を駆動させる。すると、混練押出機の混練ス
クリュー２の原料供給部３に、原料樹脂Ｐが連続的に定
量供給されると同時に、原料ゴムＲが連続的に定量供給
され、混練スクリュー２により樹脂・ゴムは混練されな
がら押圧しヘッド８からストランドＳとして押し出され
る。この押し出されたストランドＳは、水槽２１で冷却
されてペレタイザー２２に導入され、細断されてペレッ
ト化され、所要の樹脂・ゴムブレンド材料Ｍとなる。The pellet-like or powder-like resin raw material P is put into the raw material hopper 5 of the kneading extruder. The raw material rubber R made of a string-shaped (including ribbon-shaped) kneaded material is introduced into the raw material charging port 13 of the rubber constant amount extruder 11, and the rubber constant amount extruder 11 is driven so that the rubber raw material R from the extrusion head 12 is supplied. It is guided to the take-up roller 16 and further guided to the raw rubber introduction port 4. In this state, the kneading extruder 1 and the quantitative feeder 6 attached thereto, the rubber quantitative extruder 11 and the take-up roller 16 are driven. Then, the raw material resin P is continuously and quantitatively supplied to the raw material supply part 3 of the kneading screw 2 of the kneading extruder, and at the same time, the raw material rubber R is continuously and quantitatively supplied, and the resin / rubber is kneaded by the kneading screw 2. While being pressed, the head 8 is extruded as a strand S. The extruded strand S is cooled in the water tank 21, introduced into the pelletizer 22, shredded into pellets, and becomes the required resin / rubber blend material M.
上記において、樹脂・ゴムのブレンド比は、定量フィー
ダー６及びゴム定量押出機１１の送り速度を、即ち各ス
クリューの回転速度を変えることにより任意に設定でき
る。また、ゴム引き取りローラ１６は必然的ではない
が、これがあることにより、ゴム定量押出機１１から押
出される原料ゴムＲを余裕をもって混練押出機の原料ゴ
ム導入口４に供給でき、原料ゴムＲが途中で切断される
おそれがない。また、混練押出機は二軸型を用いたが一
軸型であってもよい。また、ペレタイザー２２として
は、例えば回転切断刃方式のものを用いるが、これに限
られることはない。In the above, the blending ratio of the resin and the rubber can be arbitrarily set by changing the feed speeds of the quantitative feeder 6 and the rubber quantitative extruder 11, that is, the rotation speeds of the respective screws. Further, although the rubber take-up roller 16 is not inevitable, the presence of the rubber take-off roller 16 allows the raw material rubber R extruded from the rubber quantitative extruder 11 to be supplied to the raw material rubber introduction port 4 of the kneading extruder with a margin, and the raw material rubber R There is no risk of disconnection on the way. Further, although the kneading extruder is a twin-screw type, it may be a single-screw type. As the pelletizer 22, for example, a rotary cutting blade type is used, but it is not limited to this.
第５図は、本発明の別の実施例を示す要部断面図で、上
記実施例において、ゴム定量押出機１１と混練押出機１
の原料ゴム導入口４との間にペレタイザー２３を配し、
原料ゴムＲをペレットとして混練押出機１の原料ゴム導
入口４に定量供給する方法である。また、原料導入口４
にはガイド受け板９が形成されている。ここで用いるペ
レタイザー２３の前述と同様のものでよい。この実施例
の作用は上記実施例と同様であるが、樹脂・ゴムの双方
がペレット化されて混練押出機に供給されるため、混練
効果が増大する。FIG. 5 is a cross-sectional view of an essential part showing another embodiment of the present invention.
The pelletizer 23 is arranged between the raw rubber introduction port 4 of
This is a method in which the raw material rubber R is supplied as pellets to the raw material rubber introduction port 4 of the kneading extruder 1 in a fixed amount. In addition, raw material inlet 4
A guide receiving plate 9 is formed on the. The pelletizer 23 used here may be the same as that described above. The operation of this embodiment is the same as that of the above embodiment, but since both the resin and the rubber are pelletized and supplied to the kneading extruder, the kneading effect is increased.
＜発明の効果＞ 本発明の樹脂・ゴムブレンド材料の製造方法は、スクリ
ュー型押出混練機の混練スクリューの原料供給部に、原
料樹脂を定量フィーダーを介して連続的に定量供給する
と同時に、紐状の練生地からなる原料ゴムを定量押圧機
を介して連続的に定量供給して、前述の押出スクリュー
により樹脂・ゴムの混練を行いながら押し出したストラ
ンドを連続的にペレット化する構成により下記のような
効果を奏する。<Effects of the Invention> The method for producing a resin / rubber blend material of the present invention is such that the raw material resin is continuously quantitatively fed through the quantitative feeder to the raw material feeding part of the kneading screw of the screw-type extrusion kneader, and at the same time, the cord-like shape is obtained. The raw material rubber consisting of the kneaded dough is continuously fed in a fixed amount through a constant pressure press, and the extruded screw is used to knead the resin / rubber while the extruded strands are continuously pelletized as shown below. Has a great effect.
樹脂・ゴムブレンド材料を安定したブレンド比で連続的
に製造可能となり、生産性が向上するとともに、ペレッ
ト化のための特別な造粒用押出機も不要となる。また、
樹脂・ゴムブレンド材料のブレンド比も、樹脂定量フィ
ーダー及びゴム定量押出機の各スクリューに送り速度を
変更するだけでよく、容易に任意比率を設定できる。The resin / rubber blend material can be continuously produced at a stable blending ratio, improving productivity and eliminating the need for a special granulation extruder for pelletization. Also,
Regarding the blend ratio of the resin / rubber blend material, it is only necessary to change the feed rate to each screw of the resin quantitative feeder and the rubber quantitative extruder, and an arbitrary ratio can be easily set.
図例は本発明を示し、第１図は樹脂・ゴムブレンド材料
の製造方法に使用する設備の一例を示す全体平面配置
図，第２図は同じく全体正面配置図，第３図は同じく要
部斜視図，第４図は同じく要部断面図，第５図は樹脂・
ゴムブレンド材料の製造方法に使用する設備の他の例に
おける要部断面図である。 １…スクリュー型混練押出機、 ２…混練スクリュー、 ３…原料供給部、 ４…原料ゴム導入口、 ６…定量フィーダー、 １１…ゴム定量押出機、 ２２…ペレタイザー、 Ｐ…原料樹脂、 Ｒ…原料ゴム、 Ｓ…ストランド、 Ｍ…樹脂・ゴムブレンド材料。The example of the figure shows the present invention, FIG. 1 is an overall plan layout showing an example of equipment used in a method for producing a resin / rubber blend material, FIG. 2 is an overall front layout, and FIG. A perspective view, FIG. 4 is a sectional view of the main part of the same, and FIG.
It is a principal part sectional view in the other example of the equipment used for the manufacturing method of a rubber blend material. DESCRIPTION OF SYMBOLS 1 ... Screw type kneading extruder, 2 ... Kneading screw, 3 ... Raw material supply part, 4 ... Raw material rubber introduction port, 6 ... Fixed amount feeder, 11 ... Rubber fixed amount extruder, 22 ... Pelletizer, P ... Raw material resin, R ... Raw material Rubber, S ... Strand, M ... Resin / rubber blend material.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭50−85683（ＪＰ，Ａ) 実開 昭57−183138（ＪＰ，Ｕ) 実開 昭59−107224（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-50-85683 (JP, A) Actually opened 57-183138 (JP, U) Actually opened 59-107224 (JP, U)
Claims (1)
の原料供給部に、原料樹脂を定量フイーダーを介して連
続的に定量供給すると同時に、紐状の練生地からなる原
料ゴムをゴム定量押出機を介して連続的に定量供給し
て、前記混練スクリューにより樹脂・ゴムの混練を行い
ながら押し出したストランドを細断して連続的にペレッ
ト化することを特徴とする樹脂・ゴムブレンド材料の製
造方法。1. A raw material resin consisting of a string-shaped kneading dough is fed to a raw material feeding section of a kneading screw of a screw type kneading pressing machine continuously and quantitatively through a quantitative feeder, and at the same time, a raw material rubber made of a string-shaped kneading dough is fed to a rubber quantitative extruder. A method for producing a resin / rubber blend material, characterized in that the extruded strands are chopped and pelletized continuously while the resin / rubber is kneaded by the kneading screw while being continuously supplied in a constant amount via the kneading screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60270100A JPH064245B2 (en) | 1985-11-29 | 1985-11-29 | Manufacturing method of resin / rubber blend material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60270100A JPH064245B2 (en) | 1985-11-29 | 1985-11-29 | Manufacturing method of resin / rubber blend material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62128707A JPS62128707A (en) | 1987-06-11 |
| JPH064245B2 true JPH064245B2 (en) | 1994-01-19 |
Family
ID=17481531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60270100A Expired - Fee Related JPH064245B2 (en) | 1985-11-29 | 1985-11-29 | Manufacturing method of resin / rubber blend material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064245B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4155146B2 (en) * | 2003-03-17 | 2008-09-24 | 住友化学株式会社 | Method for producing thermoplastic elastomer composition |
| JP4760071B2 (en) * | 2005-03-17 | 2011-08-31 | 住友化学株式会社 | Method for producing thermoplastic elastomer composition |
-
1985
- 1985-11-29 JP JP60270100A patent/JPH064245B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62128707A (en) | 1987-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |