JPH032005A - Method for extrusion molding of powder mixture - Google Patents
Method for extrusion molding of powder mixtureInfo
- Publication number
- JPH032005A JPH032005A JP13963789A JP13963789A JPH032005A JP H032005 A JPH032005 A JP H032005A JP 13963789 A JP13963789 A JP 13963789A JP 13963789 A JP13963789 A JP 13963789A JP H032005 A JPH032005 A JP H032005A
- Authority
- JP
- Japan
- Prior art keywords
- mixture
- molded body
- extrusion molding
- extrusion
- cylinder
- 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
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 title claims abstract description 35
- 239000000843 powder Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 25
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 239000000919 ceramic Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims description 2
- 238000012805 post-processing Methods 0.000 abstract description 6
- 239000000047 product Substances 0.000 description 11
- 239000005060 rubber Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
イ０発明の目的
〔産業上の利用分野〕
本発明は、粉末混和物の押出し成形方法、特に粉失優和
物の押出される方向で・成形体の断面形状を変化させた
形状を有する押出し成形体を提供する粉末混和物の押出
し成形方法に関する。Detailed Description of the Invention A. Object of the Invention [Field of Industrial Application] The present invention relates to an extrusion molding method for a powder mixture, and in particular, to a method for extruding a powder mixture, in particular, to The present invention relates to a method for extruding a powder mixture that provides an extrudate having a modified shape.
従来、押出し成形法は主として熱可塑性プラスチック材
料や各種ゴム等を管状や棒状の様な、様な断面形状を持
つ成形体を連続的に成形する方法として広く用いられて
いる。Conventionally, extrusion molding has been widely used as a method for continuously molding thermoplastic plastic materials, various rubbers, etc. into molded bodies having various cross-sectional shapes, such as tubes and rods.
さらに、上述した押出し成形法を利用して、熱可塑性プ
ラスチックやゴム等の一例を揚げれば、バリウムフェラ
イト粉末等の様な強磁性粉末を混和し、押出し成形する
ことにより、所謂プラスチック磁石やゴム磁石を製造す
る方法が広く工業的に行われている。Furthermore, using the above-mentioned extrusion molding method, for example, thermoplastic plastics and rubber, by mixing ferromagnetic powder such as barium ferrite powder and extrusion molding, so-called plastic magnets and rubber Methods for manufacturing magnets are widely used industrially.
一方、近年セラミックス粉末や金属粉末を押出し成形法
で成形する方法が注目されている。即ち、セラミックス
粉末や金属粉末に１０〜２０重量部程度の有機バインダ
を加え、混合、混練した後に押出し成形することによっ
て成形体を得、次いで説パインダニ程及び焼結工程を経
て所望の焼結製品を得チタ法であり、さらに詳しくは、
セラミックス粉末または金属粉末と有機バインダとの混
和物を押出し成形機のシリンダ内に供給し、次いでシリ
ンダ内に位置するスクリュによりダイスより押出し押出
し成形体とし、この押出し成形体を所望の長さに切断し
、上述したプラスチック磁石やゴム磁石の様にそのまま
の状態で利用される製品や、押出し成形体を更に脱バイ
ンダ及び焼結工程を経て焼結体として利用される製品を
得ている。On the other hand, in recent years, a method of molding ceramic powder or metal powder by extrusion molding has attracted attention. That is, about 10 to 20 parts by weight of an organic binder is added to ceramic powder or metal powder, mixed and kneaded, and then extruded to obtain a molded product.Then, the desired sintered product is obtained through a pine dusting process and a sintering process. is obtained by the Chita method, and in more detail,
A mixture of ceramic powder or metal powder and an organic binder is fed into the cylinder of an extrusion molding machine, and then extruded from a die using a screw located in the cylinder to form an extruded body, and this extruded body is cut into a desired length. However, products such as the above-mentioned plastic magnets and rubber magnets that are used as they are, and products that are used as sintered bodies by further removing the binder and sintering processes from extruded bodies are obtained.
上述した従来の粉末混和物の押出し方法は、混和物が押
出し方向に一様に、且つ連続して押出しされるので、得
られる成形体は同一断面形状を持った押出し方向に平行
な形状となる。従って、押出し方向で断面形状が変化す
る様な形状を持つ成形体を得る為には、押出し成形体を
研削や切削等の所謂後加工を必要とし、加工工数が増え
るばかりか押出し成形体自体が脆弱である為に後加工の
自由度が小さく、且つ研削、切削加工が施された部位に
加工歪みやクラック等が生じ易いと言う欠〔発明が解決
しようとする課題〕
本発明は、上述した従来の粉末混和物の押出し成形では
得られない押出し方向で断面の異なる成形物を金型の構
造を改善し、粉末混和物の押出し成形の際、後加工等す
ることなく、押出し方向において異形状の断面を持つ成
形体を連続的に得る方法を提供することにある。In the conventional powder mixture extrusion method described above, the mixture is extruded uniformly and continuously in the extrusion direction, so the resulting molded body has the same cross-sectional shape parallel to the extrusion direction. . Therefore, in order to obtain a molded body whose cross-sectional shape changes in the extrusion direction, the extruded body must be subjected to so-called post-processing such as grinding or cutting, which not only increases the number of processing steps but also damages the extruded body itself. Due to its brittleness, the degree of freedom in post-processing is small, and machining distortions and cracks are likely to occur in the parts that have been subjected to grinding and cutting. [Problems to be solved by the invention] By improving the structure of the mold, molded products with different cross-sections in the extrusion direction, which cannot be obtained with conventional extrusion molding of powder mixtures, can be produced with irregular shapes in the extrusion direction without post-processing when extruding powder mixtures. The object of the present invention is to provide a method for continuously obtaining molded bodies having a cross section of .
口０発明の構成
〔課題を解決するための手段〕
本発明は、従来の方法において、押出し成形後に、機械
加工等によって付与されていた成形体外形の形状を、前
記混和物が押出される工程において、金型の出口の一部
を摺動させ、押出し方向に直角な金型内流路の断面形状
を時間と共に変えることによって付与することで成形体
外形を所望の形状に加工できる粉末混和物の押出し成形
方法である。Configuration of the Invention [Means for Solving the Problems] The present invention provides a step in which the mixture is extruded to change the external shape of the molded product, which was given by machining or the like after extrusion molding in the conventional method. A powder mixture that can be molded into a desired shape by sliding a part of the outlet of the mold and changing the cross-sectional shape of the channel inside the mold perpendicular to the extrusion direction over time. This is an extrusion molding method.
本発明の押出し成形の場合、通常、金型出口手前にマニ
ホールドを設け、口金から均一に混和物が流出する構造
をとっているが、このマニホールドを口金の一部が摺動
する際の最大開口距離より充分に大きくすることにより
、摺動中であっても混和物は均一に流出することが可能
である。In the case of the extrusion molding of the present invention, a manifold is usually provided in front of the mold outlet, and the mixture flows out uniformly from the die. By making the distance sufficiently larger than the distance, the mixture can flow out uniformly even during sliding.
即ち、セラミックスもしくは金属の粉末の少なくとも１
種以上と可塑性を有するバインダーとを混合、混練して
得られた混和物を押出し成形法を用いて成形体とする方
法において、金型の一部を摺動させることにより、該混
和物が押出させる際の押出し方向に直角な金型内流路の
断面形状を変えることのできる金、型を用いることを特
徴とする粉末混和物の押出し成形方法を提供するもので
ある。That is, at least one of ceramic or metal powder
In a method in which a mixture obtained by mixing and kneading a binder with plasticity and a binder having plasticity is made into a molded body using an extrusion molding method, the mixture is extruded by sliding a part of the mold. The present invention provides a method for extrusion molding a powder mixture, which is characterized by using a mold and a mold that can change the cross-sectional shape of the channel in the mold perpendicular to the extrusion direction.
押出し成形金型の一部を押出し成形時に時間と共に変化
させることにより、押出し方向の形状を変化させた粉末
混和物の押出し成形体が得られ、後加工が節約でき、安
定した品質の成形体が得られる。By changing a part of the extrusion mold over time during extrusion molding, it is possible to obtain an extruded body of a powder mixture whose shape in the extrusion direction has changed, saving post-processing and producing a molded body of stable quality. can get.
次に本発明の実施例を図面を参照して詳細に説明する。 Next, embodiments of the present invention will be described in detail with reference to the drawings.
実施例１ 第１図（ａ）は本発明の一実施例を示す正面断面図。Example 1 FIG. 1(a) is a front sectional view showing one embodiment of the present invention.
第１図（ｂ）は第１図（ａ）の上面断面図である。第１
図（ａ）、（ｂ）に示す粉末混和物の押出し成形方法は
、押出し成形機（図示せず）のシリンダ１とスクリュ、
及びダイス１１．１２．１３とダイホルダ１７とブレー
カプレート１６と摺動部５０より成るダイ３を含んで構
成される。さらにシリンダニとダイホルダ１７の外側に
位置するヒータ２１，２２によってシリンダ１及びダイ
３を所望の温度に加熱できる構造を有している。FIG. 1(b) is a top sectional view of FIG. 1(a). 1st
The extrusion molding method for the powder mixture shown in Figures (a) and (b) consists of a cylinder 1 of an extruder (not shown), a screw
The die 3 includes dies 11, 12, 13, a die holder 17, a breaker plate 16, and a sliding portion 50. Furthermore, the cylinder 1 and the die 3 can be heated to a desired temperature by heaters 21 and 22 located outside the cylinder 1 and the die holder 17.
第１図（ａ）において、ダイス１２と摺動部５ｏは、各
々のダイス直線部４１，４１１が同一の形状を有してい
る。In FIG. 1(a), the die 12 and the sliding portion 5o each have the same die linear portions 41 and 411.
次に押出し成形用原料としてＦｅ３０ｗｔ％−Ｃｏ５０
ｗｔ％なる組成を持ち、平均粒径１０μｍの合金粉末１
００重量部に対しエチレン酢酸ビニル共重合樹脂５．５
重量部、高密度ポリエチレン２．７重量部、ジオクチル
フタレート１．６重量部を混合、混練して混和物を得た
。Next, Fe30wt%-Co50 was used as a raw material for extrusion molding.
Alloy powder 1 with a composition of wt% and an average particle size of 10 μm
5.5 parts by weight of ethylene vinyl acetate copolymer resin
parts by weight, 2.7 parts by weight of high-density polyethylene, and 1.6 parts by weight of dioctyl phthalate were mixed and kneaded to obtain a mixture.
次いで、ヒータ２１を１３０℃、ヒータ２２を１２０℃
としてシリンダ１、スクリュ２及びダイ３を加熱した後
、上述した混和物をシリンダ１とスクリュ２間に充填し
、溶融させ、さらにスクリュ２の回転によって、該溶融
混和物はブレーカプレート１６を通り、さらにダイス１
１．１２．１３及び摺動部５０によって形成された空隙
を通って押出し、押出し成形体３０を得た。Next, the heater 21 is heated to 130°C, and the heater 22 is heated to 120°C.
After heating the cylinder 1, screw 2, and die 3, the above-mentioned mixture is filled between the cylinder 1 and the screw 2 and melted, and as the screw 2 rotates, the molten mixture passes through the breaker plate 16. 1 more dice
1.12.13 and the gap formed by the sliding part 50 to obtain an extruded molded product 30.
押出しの速さは１ｍ／ｌｌｌ１ｎの一定とし、成形体が
押出されるのと同時に摺動部５０を速さ５０ｍｍ／ｗｉ
ｎで、ダイス１２との間隙が５〜１０ｍｍの範囲で上下
動させた。これによって、幅が３０ｍｍで最大厚みが１
０ｍｍ、最小厚みが５ｍｍの楔状の成形体を得た。The extrusion speed was constant at 1 m/lll1n, and at the same time as the molded body was extruded, the sliding part 50 was moved at a speed of 50 mm/wi.
n, the gap with the die 12 was moved up and down within a range of 5 to 10 mm. This results in a width of 30mm and a maximum thickness of 1
A wedge-shaped molded body having a thickness of 0 mm and a minimum thickness of 5 mm was obtained.
更に、上述した押出し成形体３０をアルゴンガス２リツ
トル／ ｗｉｎ流した雰囲気中で室温から毎時１０℃の
昇温速度で６００℃まで加熱し、６００℃で２時間保持
した後、室温まで冷却することにより、脱バインダを行
い、ついで真空炉中に投入し室温から毎時２００℃のが
温速度で１２００℃まで昇温加熱し１０時間保持した後
、急冷することにより前記押出し成形体３０と相似な形
状を持つＦｅ−Ｃｏ合金焼結体を得た。Further, the extruded body 30 described above is heated from room temperature to 600°C at a temperature increase rate of 10°C per hour in an atmosphere in which 2 liters/win of argon gas is flowed, held at 600°C for 2 hours, and then cooled to room temperature. Then, the binder was removed, and then the product was placed in a vacuum furnace, heated from room temperature to 1200°C at a rate of 200°C per hour, held for 10 hours, and then rapidly cooled to create a shape similar to the extruded product 30. A Fe--Co alloy sintered body was obtained.
実施例２
第２図（ａ）は本発明の第２の実施例の正面横断面図で
、第２図（ｂ）は第２図（ａ）の上面断面図である。Embodiment 2 FIG. 2(a) is a front cross-sectional view of a second embodiment of the present invention, and FIG. 2(b) is a top sectional view of FIG. 2(a).
第２図（ａ）、（ｂ）に示す粉末混和物の押出し成形方
法は、押出し成形機（図示せず）のシリンダ１とスクリ
ュ２、及び駆動アーム５１．５１１によって上下動する
摺動部５２．５２１とダイス１４．１５と中子６より成
るダイ３を含んで構成される。さらにシリンダの外側に
位置するヒータ２１とダイホルダ１７の外側に位置する
ヒータ２２によってシリンダ１及びダイ３を所望の温度
に加熱できる構造を有している。The extrusion molding method for a powder mixture shown in FIGS. 2(a) and 2(b) is based on the cylinder 1 and screw 2 of an extrusion molding machine (not shown), and a sliding part 52 which is moved up and down by drive arms 51 and 511. .521, a die 14, a die 3 consisting of a die 15, and a core 6. Furthermore, it has a structure in which the cylinder 1 and die 3 can be heated to a desired temperature by a heater 21 located outside the cylinder and a heater 22 located outside the die holder 17.
次に押出し成形用原料として、平均粒径０．５μｍのア
ルミナ粉末１００重量部に対しエチレン酢酸ビニル共重
合樹脂５．１重量部、ポリブチルメタクリレート２．３
重量部、高密度ポリエチレン２．６重量部、ジブチルフ
タレート２．０重量部を混合、混練して混和物を得た。Next, as raw materials for extrusion molding, 5.1 parts by weight of ethylene vinyl acetate copolymer resin and 2.3 parts by weight of polybutyl methacrylate were added to 100 parts by weight of alumina powder with an average particle size of 0.5 μm.
parts by weight, 2.6 parts by weight of high-density polyethylene, and 2.0 parts by weight of dibutyl phthalate were mixed and kneaded to obtain a mixture.
次いでヒータ２１を１４０℃、ヒータ２２を１３０℃と
して、シリンダ１、スクリュ２及びダイ３を加熱した後
、上述した混和物をシリンダ１とスクリュ２間に充填し
溶融させ、さらにスクリュ２の回転によって該溶融混和
物はブレーカプレート１６を通り、中子６と摺動部５２
．５２１及びダイス１５によって形成された空隙より押
出し、押出し成形体３０１を得た。Next, after heating the cylinder 1, screw 2, and die 3 by setting the heater 21 to 140°C and the heater 22 to 130°C, the above-mentioned mixture is filled between the cylinder 1 and the screw 2, melted, and further rotated by the rotation of the screw 2. The molten mixture passes through the breaker plate 16 and passes through the core 6 and the sliding part 52.
．． 521 and the gap formed by the die 15 to obtain an extruded molded product 301.
この時、押出しの速さは１ｍ／ｍｉｎの一定とし、成形
体が押出されると同時に摺動部５２．５２１をそれぞれ
速さ５０ｍｍ／ｗｉｎで中子との間隙が２ないし５ｍｍ
の範囲で上下動させた。これによって幅が３０ｍ＋ｎで
最大厚みが１０ｍｍ、最小厚みが４ｍｍの外形寸法を有
し、内部に高さ１ｍｍ、幅２５ｍｍの矩形の空洞を持つ
成形体を得た。At this time, the extrusion speed was kept constant at 1 m/min, and at the same time as the molded body was extruded, the sliding parts 52 and 521 were moved at a speed of 50 mm/win so that the gap between them and the core was 2 to 5 mm.
Moved up and down within the range. As a result, a molded body was obtained which had an external dimension of 30 m+n in width, 10 mm in maximum thickness, and 4 mm in minimum thickness, and had a rectangular cavity with a height of 1 mm and a width of 25 mm inside.
さらに、上述した押出し成形体３０１を窒素ガス２リツ
トル／ ｗｉｎ流した雰囲気中で室温から毎時１０’Ｃ
の昇温速度で６００℃まで加熱し、６００℃で２時間保
持した後、室温まで冷却することにより、脱バインダを
行い、ついで、大気雰囲気中でガス炉を用い、室温から
毎時２００℃の昇温速度で１６００℃まで昇温加熱し、
２時間保持した後、毎時２００℃で８００℃まで冷却し
た後、空気中で放冷することにより前記押出し成形体３
０１と相似な形状を持つアルミナ焼結体を得た。Furthermore, the extrusion molded body 301 described above was heated at 10'C/hour from room temperature in an atmosphere in which 2 liters/win of nitrogen gas was flowed.
The binder was removed by heating to 600°C at a heating rate of 2 hours, holding at 600°C for 2 hours, and cooling to room temperature. Heat up to 1600℃ at a temperature rate,
After holding for 2 hours, the extrusion molded product 3 was cooled at 200°C per hour to 800°C, and then left to cool in air.
An alumina sintered body having a shape similar to that of 01 was obtained.
以上本発明の実施例を詳細に説明したが、上述した実施
例では、いづれもバインダとして所謂熱可塑性を持つ高
分子材を用いたが、各種ゴムやメチルセルロース等の水
溶性材料もバインダとして適用できることは勿論である
。The embodiments of the present invention have been described in detail above, and in the above embodiments, a so-called thermoplastic polymer material was used as a binder, but it is understood that various rubbers and water-soluble materials such as methylcellulose can also be used as a binder. Of course.
また、セラミックスもしくは金属の粉末も上述したＦｅ
−Ｃｏ合金粉末、アルミナ粉末に限定するものでないこ
とは言うまでもない。In addition, ceramics or metal powders may also be used as Fe as mentioned above.
It goes without saying that the present invention is not limited to -Co alloy powder and alumina powder.
さらに、上述した実施例では、いづれも押出し成形体を
脱バインダし焼結しているが、押出し成形体自体を最終
製品として使用しても差し支えない。Further, in the above-mentioned embodiments, the extruded body is binder-removed and sintered, but the extruded body itself may be used as a final product.
ハ０発明の効果
〔発明の効果〕
以上述べた様に、本発明の粉末混和物の押出し成形法は
、セラミックス又は金属の粉末の少なくとも１種以上と
可塑性を有するバインダとの混和物を押出し成形する際
に、金型の一部を摺動させて、押出し方向に直角な金型
内流路の断面形状を変えることにより後加工なしに成形
体断面を押出し方向に沿って変えることができるので圧
粉体の成形が経済的にでき、しかも押出し成形体に加わ
る応力による変形成いは破壊を回避できるという効果が
ある。C0 Effects of the Invention [Effects of the Invention] As described above, the extrusion molding method for a powder mixture of the present invention comprises extrusion molding a mixture of at least one ceramic or metal powder and a binder having plasticity. When doing this, by sliding a part of the mold and changing the cross-sectional shape of the channel inside the mold perpendicular to the extrusion direction, the cross-section of the molded product can be changed along the extrusion direction without any post-processing. This method has the advantage that the green compact can be formed economically, and deformation or destruction due to stress applied to the extruded compact can be avoided.
従って、本発明の粉末混和物の押出し成形方法は製造工
程の簡略化及び歩留り向上が図れるので工業上極めて有
益である。Therefore, the method of extrusion molding a powder mixture of the present invention is extremely useful industrially because it can simplify the manufacturing process and improve the yield.
第１図（ａ）は本発明の一実施例を示す正面断面図。
第１図（ｂ）は、第１図（ａ）に示す本発明の一実施例
の上面断面図。第２図（ａ）は本発明の第２の実施例を
示す正面断面図。第２図（ｂ）は、第２図（ａ）に示す
本発明の第２の実施例の上面断面図。
１・・・シリンダ、２・・・スクリュ、３・・・ダイ、
１１．１２．１３゜１４、１５・・・ダイス、１６・・
・ブレーカプレート、１７・・・ダイホルダ、２１．２
２・・・ヒータ、３０．３０１・・・押出し成形体、４
１．４１１・・・ダイス直線部、５１，５１１・・・駆
動アーム、５０゜５２．５２１・・・摺動部、６・・・
中子。
第１図
（Ｇ）
＜、ｂ＞FIG. 1(a) is a front sectional view showing one embodiment of the present invention. FIG. 1(b) is a top sectional view of the embodiment of the present invention shown in FIG. 1(a). FIG. 2(a) is a front sectional view showing a second embodiment of the present invention. FIG. 2(b) is a top sectional view of the second embodiment of the present invention shown in FIG. 2(a). 1...Cylinder, 2...Screw, 3...Die,
11.12.13゜14, 15...Dice, 16...
・Breaker plate, 17...Die holder, 21.2
2... Heater, 30.301... Extruded body, 4
1.411...Dice straight part, 51,511...Drive arm, 50°52.521...Sliding part, 6...
Middle child. Figure 1 (G) <, b>
Claims (1)
以上と可塑性を有するバインダーとを混合、混練して得
られた混和物を押出し成形法を用いて成形体とする方法
において、金型の一部を摺動させることにより、該混和
物が押出させる際の押出し方向に直角な金型内流路の断
面形状を変えることのできる金型を用いることを特徴と
する粉末混和物の押出し成形方法。1. In a method in which a mixture obtained by mixing and kneading at least one ceramic or metal powder and a binder having plasticity is made into a molded body using an extrusion molding method, a part of the mold is rubbed. 1. A method for extrusion molding a powder mixture, characterized by using a mold that can be moved to change the cross-sectional shape of a channel in the mold perpendicular to the extrusion direction in which the mixture is extruded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13963789A JPH032005A (en) | 1989-05-31 | 1989-05-31 | Method for extrusion molding of powder mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13963789A JPH032005A (en) | 1989-05-31 | 1989-05-31 | Method for extrusion molding of powder mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH032005A true JPH032005A (en) | 1991-01-08 |
Family
ID=15249918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13963789A Pending JPH032005A (en) | 1989-05-31 | 1989-05-31 | Method for extrusion molding of powder mixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032005A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002079509A (en) * | 2000-06-30 | 2002-03-19 | Denso Corp | Method and apparatus for molding ceramic sheet |
| EP1481779A3 (en) * | 2003-05-20 | 2010-07-07 | Ngk Insulators, Ltd. | Forming JIG and method for producing formed body using same |
| KR101114424B1 (en) * | 2011-04-22 | 2012-03-13 | 세명대학교 산학협력단 | Piezoelectric ceramics composition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0286409A (en) * | 1988-09-22 | 1990-03-27 | Toshiba Corp | Ceramic molding equipment |
-
1989
- 1989-05-31 JP JP13963789A patent/JPH032005A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0286409A (en) * | 1988-09-22 | 1990-03-27 | Toshiba Corp | Ceramic molding equipment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002079509A (en) * | 2000-06-30 | 2002-03-19 | Denso Corp | Method and apparatus for molding ceramic sheet |
| JP4670174B2 (en) * | 2000-06-30 | 2011-04-13 | 株式会社デンソー | Ceramic sheet forming method and forming apparatus |
| EP1481779A3 (en) * | 2003-05-20 | 2010-07-07 | Ngk Insulators, Ltd. | Forming JIG and method for producing formed body using same |
| KR101114424B1 (en) * | 2011-04-22 | 2012-03-13 | 세명대학교 산학협력단 | Piezoelectric ceramics composition |
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