JPH0733014B2 - Extrusion molding method and extrusion molding apparatus - Google Patents
Extrusion molding method and extrusion molding apparatusInfo
- Publication number
- JPH0733014B2 JPH0733014B2 JP31719787A JP31719787A JPH0733014B2 JP H0733014 B2 JPH0733014 B2 JP H0733014B2 JP 31719787 A JP31719787 A JP 31719787A JP 31719787 A JP31719787 A JP 31719787A JP H0733014 B2 JPH0733014 B2 JP H0733014B2
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- Japan
- Prior art keywords
- raw material
- extrusion molding
- cylinder
- filling space
- fluid
- 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.)
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Description
本発明は、可撓性を有する加圧筒体の内側に充填された
スラリー，練土又はバインダーを含有する粉体等からな
る原料を押出して線材又は板材等にする押出成形方法及
び押出成形装置に関するものである。The present invention relates to an extrusion molding method and an extrusion molding apparatus for extruding a raw material composed of a slurry, a kneaded material or a powder containing a binder, which is filled inside a flexible pressure cylinder into a wire or plate. It is about.
従来の一般的な押出成形装置は、例えば第８図の縦断面
図に示す通りである。同図に示す如く、従来の押出成形
装置１は、シリンダー２の先端側開口部に、蓋体３を装
着して緊締具４でこれを緊締し、蓋体４に押出ダイ５を
取付けている。６は、押出ダイ９の押出口である。そし
て、シリンダー２の後端側開口部にプランジャー７を嵌
合装着し、シリンダー内周面2aと接する部分に環状のシ
ール用パッキン10を配置している。なお、第８図におい
て、11は成形品９の搬出用コンベアである。 前記押出成形装置１の用法を、作業手順に従って説明す
る。先ず、プランジャー７をシリンダー２から抜き出
し、シリンダー２内へ原料８を充填する。そして、再度
シリンダー２内へプランジャー７を嵌合装着し、プラン
ジャー７を前進させて原料８を加圧する。原料８は、こ
の加圧により、高圧縮された状態で押出ダイ５の押出口
６から押し出され、線状又は板状等の押出成形品９とな
る。A conventional general extrusion molding apparatus is, for example, as shown in a vertical sectional view of FIG. As shown in the figure, in the conventional extrusion molding apparatus 1, the lid body 3 is attached to the front end side opening portion of the cylinder 2 and is tightened with the tightening tool 4, and the extrusion die 5 is attached to the lid body 4. . Reference numeral 6 is an extrusion port of the extrusion die 9. Then, the plunger 7 is fitted and attached to the rear end side opening of the cylinder 2, and the annular sealing packing 10 is arranged at the portion in contact with the cylinder inner peripheral surface 2a. In FIG. 8, 11 is a conveyor for carrying out the molded product 9. The usage of the extrusion molding apparatus 1 will be described according to a work procedure. First, the plunger 7 is extracted from the cylinder 2 and the raw material 8 is filled in the cylinder 2. Then, the plunger 7 is fitted and mounted in the cylinder 2 again, and the plunger 7 is advanced to pressurize the raw material 8. By this pressure, the raw material 8 is extruded from the extrusion port 6 of the extrusion die 5 in a highly compressed state and becomes a linear or plate-shaped extrusion molded product 9.
ところが前記従来の押出成形装置１にあっては、次の様
な問題点があった。即ち、原料８は、プランジャー７の
前進・後退動作の繰返しにより、シール用パッキン10へ
付着して噛み込み、シリンダー内周面6aに引掻き傷を付
けたり、第９図に示す如く、パッキン10自体を損傷させ
ることがあつた。そのため、前記損傷の程度によつて
は、原料８がシリンダー内周面2aとプランジャー７との
間から外部へ流出し、所定の加圧力が得られなくなると
いう欠点があつた。またシリンダー内周面2aの引掻き傷
やパツキン10の損傷は、その後の使用により更にひどく
なるので、数回の押出成形後に前記パツキン10を取替え
ると共にシリンダー内周面2aの再研磨等の保守が必要で
ある。従って、保守の間は、押出成形を停止しておかね
ばならず、装置の稼動効率の低下を招き、加えてパツキ
ン10のストックのための費用が嵩むという欠点があつ
た。However, the conventional extrusion molding apparatus 1 has the following problems. That is, the raw material 8 adheres to the sealing packing 10 and is bitten by repeated forward and backward movements of the plunger 7, and scratches the inner peripheral surface 6a of the cylinder, or as shown in FIG. It could damage itself. Therefore, depending on the degree of the damage, the raw material 8 flows out from between the cylinder inner peripheral surface 2a and the plunger 7 to the outside, and a predetermined pressing force cannot be obtained. Further, scratches on the cylinder inner peripheral surface 2a and damage to the packing 10 are further aggravated by subsequent use.Therefore, it is necessary to replace the packing 10 after several extrusion moldings and perform maintenance such as re-polishing of the cylinder inner peripheral surface 2a. Is. Therefore, during the maintenance, the extrusion molding must be stopped, which leads to a decrease in the operating efficiency of the apparatus, and in addition, the cost for stocking the packing 10 increases.
本発明は、上記問題点に鑑み、プランジャー等の摺動機
構を用いない原料加圧手段にて原料を加圧する押出成形
方法及び押出成形装置の提供を目的とする。In view of the above problems, it is an object of the present invention to provide an extrusion molding method and an extrusion molding apparatus that press a raw material with a raw material pressurizing means that does not use a sliding mechanism such as a plunger.
本第一の発明に係る押出成形方法の要旨は、可撓性の加
圧筒体の内側に形成された原料充填空間に原料を充填
し、加圧筒体の外周に形成された受圧面の全面を加圧流
体で加圧し、前記原料充填空間の端部に設けた押出ダイ
から加圧した原料を押出することである。 本第二の発明に係る押出成形装置の要旨は、原料充填空
間を内側に形成した可撓性の加圧筒体と、加圧筒体を外
嵌する保持ケースと、加圧筒体と保持ケースとの間に形
成された流体圧力室と、流体圧力室に一端を開口した流
体供給路と、原料充填空間の端部に設けられた押出ダイ
とから構成したことである。The gist of the extrusion molding method according to the first aspect of the present invention is to fill a raw material filling space formed inside a flexible pressure cylinder with a raw material, and to form a pressure receiving surface of the pressure cylinder on the outer periphery of the pressure cylinder. The entire surface is pressurized with a pressurized fluid, and the pressurized raw material is extruded from an extrusion die provided at the end of the raw material filling space. The gist of the extrusion molding apparatus according to the second aspect of the present invention is a flexible pressure cylinder having a raw material filling space formed inside, a holding case for externally fitting the pressure cylinder, a pressure cylinder and a holding member. The fluid pressure chamber is formed between the case and the case, the fluid supply path having one end opened to the fluid pressure chamber, and the extrusion die provided at the end of the raw material filling space.
流体給排路を介して流体圧力室に加圧流体を供給する
と、可撓性を有する加圧筒が内径方向へ縮径し、原料充
填空間内の原料を加圧する。加圧された原料は、押出ダ
イの押出口から超高圧の状態で押し出される。When the pressurized fluid is supplied to the fluid pressure chamber via the fluid supply / discharge passage, the flexible pressure cylinder contracts in the inner diameter direction to pressurize the raw material in the raw material filling space. The pressurized raw material is extruded from the extrusion port of the extrusion die in an ultrahigh pressure state.
次に、本発明に係る押出成形方法（以下、「本発明方
法」という）及び本発明に係る押出成形装置（以下、
「本発明装置」という）を図面に示す実施例に基づいて
説明する。 （第１実施例） 第１図乃至第５図は、第１実施例を示すものである。本
発明装置20は、被加圧具21と加圧具22と搬出コンベア11
とからなる。 被加圧具21は、可撓性の素材（例えば、ネオプレインゴ
ム，ウレタン樹脂等よりなり、その硬度がJISゴム硬度4
0〜90度の範囲で適宜選択されるもの）より形成される
と共に上下方向に長い原料充填空間23を内側に形成した
モールド24と、原料充填空間23の上下の開口端23a,23b
を覆蓋する蓋体25,26と、蓋体26に取付けられた押出ダ
イ５とからなる。押出ダイ５の押出口６の形状は、円以
外にも三角形や四角形等の多角形であつてもよく、更に
はその他の星型形状等の任意形状であってもよい。 加圧具22は、保持ケース28の内部に、加圧筒体29が内嵌
されている。保持ケース28は、剛体の外筒35と、外筒35
の上下端に螺着され、加圧筒体29の外曲りの周縁部29a,
29bを挾持する上下の蓋体30,31とからなり、外筒35の内
周面35aと加圧筒体29の受圧面29cとの間に環状の流体圧
力室32が形成されている。保持ケース28は、流体圧力室
32に開口する流体給排路33,34が形成されていると共
に、流体給排路33,34に加圧流体供給装置（図示は省
略）が接続配管されている。前記加圧筒体29は、可撓性
の素材（例えば、ネオプレンゴム，ウレタン樹脂等）よ
り形成されたものであつて、その硬度がJISゴム硬度40
〜90度の範囲で適宜選択される。 前記被加圧具21は、前記加圧具22の開口端22a又は22bか
ら加圧筒体29の内側に挿入され、加圧具22の開口端22a,
22bに螺着した締付具36,37で保持される。 本発明装置20は、図示実施例において、原料充填空間23
の長軸が上下方向に一致するものであるが、何らこれに
限定するみのではなく、図示は省略したが、原料充填空
間23の長軸が傾斜するものまたは水平なものであつても
勿論よい。また本発明装置20は、射出成形装置として用
いることも可能であり、射出成形の場合には押出ダイ
（ノズル）５を射出成形型（図示は省略）の注入口に接
続して用いる。 次に、本発明方法の実施例を本発明装置20の使用手順に
基づいて説明する。先ず、第４図に示す如く、原料充填
空間23内に原料８を充填した被加圧具21を準備する。被
加圧具21は、加圧具22内に挿入され、加圧具22に螺着さ
れた上下の締付具36,37により所定位置（第１図参照）
に保持される。このような状態から押出成形を開始す
る。押出成形は、加圧流体供給装置（図示は省略）から
供給された加圧流体38（例えば、油，グリセリン，ほう
酸水又は空気等）を外筒35の流体給排路33,34を介して
流体圧力室32に供給して行なう。流体圧力室32内に供給
された加圧流体38は、第３図に示すように可撓性の加圧
筒体29の受圧面29cの全面を同時にして加圧筒体29を内
径方向へ縮径する。可撓性のモールド24は、加圧筒体29
からの絞り押圧力を受けることにより、原料充填空間23
内の原料８を超高圧で加圧する。加圧された原料８は、
押出ダイ５の押出口６から超高圧に加圧された状態で押
し出され、線状又は板状等の押出成形品９となって搬送
コンベア11により次工程へ搬送される。 モールド24及び加圧筒体29の弾性変形が第３図に示すよ
うな限界値点に近づいた後は、加圧流体38を減圧させ、
加圧筒体25を自己弾性力により元の状態に自然復帰させ
る。そして、加圧具22内から被加圧具21を取外して、モ
ールド24内に新に原料８を充填して、押出成形を繰返
す。 （第２実施例） 第５図乃至第７図は、第２実施例の本発明装置40を示す
ものである。本発明装置40が前記第１実施例の本発明装
置20と大きく異なる所は、モールドを備えることなく、
加圧筒体49の内周面49dで原料充填空間53を形成した点
である。本発明装置40は、外筒45に内嵌された加圧筒体
49と、外筒45の内周面45aと加圧筒体49の受圧面49cとの
間に形成された環状の流体圧力室42と、流体圧力室42に
開口する流体給排路43,44と、外筒45の開口端45b,45cに
螺着され加圧筒体49の周縁部49a,49bを挾持する蓋体50,
51と、蓋体50に取付けられた押出ダイ５と、蓋体51の粉
充填口51aに螺着したプラグ52とからなる。 次に、本発明方法の実施例を本発明装置40の使用手順に
基づいて説明する。先ず、第５図に示す如く、蓋体51の
粉充填口51aから原料充填空間53内に原料８を充填した
後、プラグ52を螺着して準備を行なう。このような状態
から押出成形を開始する。押出成形は、加圧流体38を外
筒45の流体給排路43,44を介して流体圧力室42に供給し
て行なう。流体圧力室42内に供給された加圧流体38は、
可撓性の加圧筒体49の受圧面49cの全面を同時にして加
圧筒49を内径方向へ縮径して、第７図に示すように原料
充填空間53内の原料８を超高圧で加圧する。加圧された
原料８は、押出ダイ５の押出口６から超高圧に加圧され
た状態で押し出され、線状又は板状等の押出成形品９と
なって搬送コンベア11により次工程へ搬送される。 加圧筒体49の弾性変形が限界値点に近づいた後は、加圧
流体38を減圧させ、加圧筒体49を自己弾性力により元の
状態に自然復帰させる。そして、原料充填空間53内に新
に原料８を充填して、押出成形を繰返す。Next, the extrusion molding method according to the present invention (hereinafter referred to as "the present invention method") and the extrusion molding apparatus according to the present invention (hereinafter referred to as "
The "device of the present invention" will be described based on an embodiment shown in the drawings. (First Embodiment) FIGS. 1 to 5 show a first embodiment. The device 20 of the present invention includes a pressurizing tool 21, a pressurizing tool 22, and a carry-out conveyor 11
Consists of. The pressed member 21 is made of a flexible material (for example, neoprene rubber, urethane resin, etc., and has a hardness of JIS rubber hardness 4).
A mold 24 which is formed of a material (which is appropriately selected within the range of 0 to 90 degrees) and which has a raw material filling space 23 formed in the vertical direction and which is long in the vertical direction;
It is composed of lids 25 and 26 for covering the lid and an extrusion die 5 attached to the lid 26. The shape of the extrusion port 6 of the extrusion die 5 may be a polygon such as a triangle or a quadrangle other than a circle, and may be an arbitrary shape such as another star shape. In the pressure tool 22, a pressure cylinder 29 is fitted inside a holding case 28. The holding case 28 includes a rigid outer tube 35 and an outer tube 35.
Is screwed to the upper and lower ends of the outer peripheral portion 29a of the pressurizing cylinder 29,
It is composed of upper and lower lids 30 and 31 that hold 29b, and an annular fluid pressure chamber 32 is formed between the inner peripheral surface 35a of the outer cylinder 35 and the pressure receiving surface 29c of the pressure cylinder 29. The holding case 28 is a fluid pressure chamber.
Fluid supply / discharge passages 33, 34 that open to 32 are formed, and a pressurized fluid supply device (not shown) is connected and connected to the fluid supply / discharge passages 33, 34. The pressurizing cylinder 29 is made of a flexible material (for example, neoprene rubber, urethane resin, etc.), and its hardness is JIS rubber hardness 40.
It is appropriately selected within a range of up to 90 degrees. The pressed member 21 is inserted into the pressurizing cylinder 29 from the opening end 22a or 22b of the pressing member 22, and the opening end 22a of the pressing member 22,
It is held by fasteners 36 and 37 screwed to 22b. The device 20 of the present invention has a material filling space 23 in the illustrated embodiment.
The major axis of the raw material filling space 23 is the same as the vertical direction, but the present invention is not limited to this, and the illustration is omitted. Good. The device 20 of the present invention can also be used as an injection molding device, and in the case of injection molding, the extrusion die (nozzle) 5 is used by being connected to the injection port of an injection molding die (not shown). Next, an embodiment of the method of the present invention will be described based on the procedure of using the device 20 of the present invention. First, as shown in FIG. 4, a pressurized tool 21 in which the raw material 8 is filled in the raw material filling space 23 is prepared. The pressurized tool 21 is inserted into the pressurizing tool 22 and is positioned at a predetermined position by the upper and lower fastening tools 36 and 37 screwed to the pressurizing tool 22 (see FIG. 1).
Held in. From this state, extrusion molding is started. In the extrusion molding, the pressurized fluid 38 (for example, oil, glycerin, boric acid water or air) supplied from a pressurized fluid supply device (not shown) is supplied via the fluid supply / discharge passages 33, 34 of the outer cylinder 35. This is performed by supplying the fluid pressure chamber 32. As shown in FIG. 3, the pressurized fluid 38 supplied into the fluid pressure chamber 32 moves the entire pressure receiving surface 29c of the flexible pressure cylinder 29 at the same time in the inner diameter direction of the pressure cylinder 29. Reduce the diameter. The flexible mold 24 includes a pressure cylinder 29.
The raw material filling space 23
The raw material 8 therein is pressurized at an ultrahigh pressure. The pressurized raw material 8 is
The extruded product is extruded from the extrusion port 6 of the extrusion die 5 in a state of being pressurized to an ultrahigh pressure, and becomes an extruded product 9 having a linear shape or a plate shape, which is conveyed to the next step by a conveyor 11. After the elastic deformation of the mold 24 and the pressurizing cylinder 29 approaches the limit value point as shown in FIG. 3, the pressurizing fluid 38 is depressurized,
The pressurizing cylinder 25 is naturally returned to its original state by the self-elasticity. Then, the pressurizing tool 21 is removed from the pressurizing tool 22, the raw material 8 is newly filled in the mold 24, and the extrusion molding is repeated. (Second Embodiment) FIGS. 5 to 7 show a device 40 of the present invention according to a second embodiment. The device 40 of the present invention is substantially different from the device 20 of the first embodiment in that it does not include a mold.
The point is that the raw material filling space 53 is formed by the inner peripheral surface 49d of the pressurizing cylinder 49. The device 40 of the present invention is a pressurizing cylinder body fitted in the outer cylinder 45.
49, an annular fluid pressure chamber 42 formed between the inner peripheral surface 45a of the outer cylinder 45 and the pressure receiving surface 49c of the pressurizing cylinder 49, and fluid supply / discharge passages 43, 44 opening to the fluid pressure chamber 42. And a lid body 50 screwed to the open ends 45b and 45c of the outer cylinder 45 to hold the peripheral edge portions 49a and 49b of the pressure cylinder body 49,
51, an extrusion die 5 attached to the lid 50, and a plug 52 screwed into the powder filling port 51a of the lid 51. Next, an embodiment of the method of the present invention will be described based on the procedure of using the device 40 of the present invention. First, as shown in FIG. 5, the raw material 8 is filled into the raw material filling space 53 from the powder filling port 51a of the lid 51, and then the plug 52 is screwed to prepare. From this state, extrusion molding is started. The extrusion molding is performed by supplying the pressurized fluid 38 to the fluid pressure chamber 42 via the fluid supply / discharge passages 43, 44 of the outer cylinder 45. The pressurized fluid 38 supplied into the fluid pressure chamber 42 is
At the same time, the entire pressure receiving surface 49c of the flexible pressurizing cylinder 49 is reduced in diameter in the pressurizing cylinder 49, so that the raw material 8 in the raw material filling space 53 becomes ultrahigh pressure as shown in FIG. Pressurize with. The pressurized raw material 8 is extruded from the extrusion port 6 of the extrusion die 5 in a state of being pressurized to an ultrahigh pressure and becomes a linear or plate-shaped extruded product 9 which is conveyed to the next step by a conveyor 11. To be done. After the elastic deformation of the pressurizing cylinder 49 approaches the limit value point, the pressurizing fluid 38 is depressurized and the pressurizing cylinder 49 is naturally returned to the original state by the self-elastic force. Then, the raw material 8 is newly filled in the raw material filling space 53, and the extrusion molding is repeated.
以上詳述の如く、本発明は次の如き優れた効果を有す
る。 原料充填空間内に密封した原料を加圧筒体で、原料を
絞るように加圧して押出するので、機械的な摺動面に原
料を接触させることなく円滑な押出成形を確保する。そ
の結果、本発明は押出成形装置の円滑な稼動を維持して
装置の使用効率を飛躍的に向上させる。更に本発明は、
原料に対する加圧力を飛躍的に増大させることができ
る。発明者の試験によると、プランジー式の従来押出成
形装置の加圧力は10〜20kg/cm2が限界であつたのに対
し、本発明装置の加圧力は1,500〜2,000kg/cm2まで昇圧
することができる。 本発明は、従来の押出成形装置のプランジャー及びシ
ール用パツキンが不要であり、これらの保守作業を省略
でき、加えてシール用パツキンクの分だけランニングコ
ストを少なくすることができる。As described in detail above, the present invention has the following excellent effects. The raw material sealed in the raw material filling space is extruded by pressing the raw material with a pressurizing cylinder, so that the smooth extrusion molding is ensured without bringing the raw material into contact with the mechanical sliding surface. As a result, the present invention maintains smooth operation of the extrusion molding apparatus and dramatically improves the usage efficiency of the apparatus. Further, the present invention is
The pressure applied to the raw material can be dramatically increased. According to tests of the inventors, applied pressure Puranji type of a conventional extrusion apparatus while 10-20 kg / cm 2 has been filed at the limit, pressure of the device of the present invention is increased to 1,500~2,000kg / cm 2 be able to. The present invention does not require the plunger and the seal packing of the conventional extrusion molding apparatus, the maintenance work thereof can be omitted, and the running cost can be reduced by the seal packing.
第１図乃至第４図は本発明装置の第１実施例を示すもの
であつて、第１図は縦断面図、第２図は第１図のII−II
線における横断面図、第３図は押出成形状態を示す縦断
面図、第４図は加圧具に被加圧具を装填している状態の
途中を示す縦断面図、第５図乃至第７図は本発明装置の
第２実施例を示すものであつて、第５図は縦断面図、第
６図は第５図のVI−VI線における横断面図、第７図は押
出成形状態を示す縦断面図、第８図は従来の押出成形装
置の全体を示す縦断面図、第９図は第８図の部分拡大図
である。 ５…押出ダイ、23（53）…原料充填空間 29（49）…加圧筒体、32（42）…流体加圧室 33,34（43,44）…流体給排路1 to 4 show a first embodiment of the device of the present invention, wherein FIG. 1 is a longitudinal sectional view and FIG. 2 is II-II of FIG.
3 is a vertical cross-sectional view showing an extruded state, FIG. 4 is a vertical cross-sectional view showing the middle of a state in which a pressurizing tool is loaded with a pressurizing tool, and FIGS. FIG. 7 shows a second embodiment of the device of the present invention. FIG. 5 is a longitudinal sectional view, FIG. 6 is a transverse sectional view taken along line VI-VI of FIG. 5, and FIG. FIG. 8 is a vertical sectional view showing the entire conventional extrusion molding apparatus, and FIG. 9 is a partially enlarged view of FIG. 5 ... Extrusion die, 23 (53) ... Raw material filling space 29 (49) ... Pressurizing cylinder, 32 (42) ... Fluid pressurizing chamber 33, 34 (43, 44) ... Fluid supply / discharge passage
Claims (2)
充填空間に原料を充填し、加圧筒体の外周に形成された
受圧面の全面を加圧流体で加圧し、前記原料充填空間の
端部に設けた押出ダイから加圧した原料を押出する押出
成形方法。1. A raw material filling space formed inside a flexible pressure cylinder is filled with a raw material, and the entire pressure receiving surface formed on the outer periphery of the pressure cylinder is pressurized with a pressurized fluid, An extrusion molding method of extruding a pressurized raw material from an extrusion die provided at an end of the raw material filling space.
圧筒体と、加圧筒体を外嵌する保持ケースと、加圧筒体
と保持ケースとの間に形成された流体圧力室と、流体圧
力室に一端を開口した流体供給路と、原料充填空間の端
部に設けられた押出ダイとからなることを特徴とする押
出成形装置。2. A flexible pressure cylinder having a raw material filling space formed inside, a holding case for externally fitting the pressure cylinder, and a fluid formed between the pressure cylinder and the holding case. An extrusion molding apparatus comprising: a pressure chamber, a fluid supply path having one end opened to the fluid pressure chamber, and an extrusion die provided at an end of a raw material filling space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31719787A JPH0733014B2 (en) | 1987-12-14 | 1987-12-14 | Extrusion molding method and extrusion molding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31719787A JPH0733014B2 (en) | 1987-12-14 | 1987-12-14 | Extrusion molding method and extrusion molding apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01156011A JPH01156011A (en) | 1989-06-19 |
| JPH0733014B2 true JPH0733014B2 (en) | 1995-04-12 |
Family
ID=18085541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31719787A Expired - Lifetime JPH0733014B2 (en) | 1987-12-14 | 1987-12-14 | Extrusion molding method and extrusion molding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0733014B2 (en) |
-
1987
- 1987-12-14 JP JP31719787A patent/JPH0733014B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01156011A (en) | 1989-06-19 |
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