JPS63193817A - Extrusion molding machine having inner barrel made of resin - Google Patents
Extrusion molding machine having inner barrel made of resinInfo
- Publication number
- JPS63193817A JPS63193817A JP62025194A JP2519487A JPS63193817A JP S63193817 A JPS63193817 A JP S63193817A JP 62025194 A JP62025194 A JP 62025194A JP 2519487 A JP2519487 A JP 2519487A JP S63193817 A JPS63193817 A JP S63193817A
- Authority
- JP
- Japan
- Prior art keywords
- barrel
- extrusion molding
- screw
- inner barrel
- molding machine
- 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.)
- Granted
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 54
- 239000011347 resin Substances 0.000 title claims abstract description 23
- 229920005989 resin Polymers 0.000 title claims abstract description 23
- 239000000919 ceramic Substances 0.000 claims abstract description 28
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims abstract description 6
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 8
- 239000010935 stainless steel Substances 0.000 abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 6
- 229910001208 Crucible steel Inorganic materials 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract 3
- 230000001133 acceleration Effects 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 239000004927 clay Substances 0.000 description 9
- 239000012778 molding material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004898 kneading Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- -1 fluororesin Polymers 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000219112 Cucumis Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B29C48/50—Details of extruders
- B29C48/68—Barrels or cylinders
- B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
- B29C48/686—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having grooves or cavities
-
- 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
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は押出成形機に係り、特にセラミックスクリユー
と、自己潤滑性を有する樹脂製インナーバレルとを設け
ることにより、耐久性を高め、成形材料への異物の混入
等の問題を解決した押出成形機に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an extrusion molding machine, and in particular, by providing a ceramic screw and a self-lubricating resin inner barrel, the durability is improved and the molding process is improved. This invention relates to an extrusion molding machine that solves problems such as foreign matter getting mixed into materials.
［従来の技術］
従来より、セラミックス等の可塑性を有する坏土の押出
成形において、土練機あるいは真空土練押出成形機等の
スクリュ一方式による土練及び押出成形機構を有した押
出成形機が使用されて来ている。押出成形機は、バレル
とこれに挿設されたスクリューとを備えてなり、従来、
バレル及びスクリューの構成用材料としては、鋳鋼ある
いはステンレス鋼等が主に使用されている。[Prior Art] Conventionally, in the extrusion molding of clay having plasticity such as ceramics, extrusion molding machines having a clay kneading and extrusion molding mechanism using one screw type, such as a clay kneading machine or a vacuum clay extrusion molding machine, have been used. It is being used. An extrusion molding machine is equipped with a barrel and a screw inserted into the barrel.
Cast steel, stainless steel, etc. are mainly used as materials for constructing the barrel and screw.
［発明が解決しようとする問題点］
しかしながら、金属材料で構成された押出成形機では、
耐摩耗性が十分に得られず、そのため、構成部品を短時
間で頻繁に交換する必要が生じる。このため、設備交換
によるコストアップ、生産性低下、成形条件の不安定化
（例えば、著しい摩耗のために機械の新旧によって押出
圧が大きく変動する）等の問題がある。[Problems to be solved by the invention] However, in extrusion molding machines made of metal materials,
Sufficient wear resistance is not achieved, which necessitates frequent replacement of component parts within a short period of time. For this reason, there are problems such as increased costs due to equipment replacement, decreased productivity, and unstable molding conditions (for example, extrusion pressure varies greatly depending on whether the machine is old or new due to significant wear).
また、摩耗による鉄その他の金属が押出成形材料中に混
入し、製品品質を悪化させるという問題もあった。There is also the problem that iron and other metals due to wear are mixed into the extrusion molding material, deteriorating product quality.
スクリューの耐摩耗性の改善策としては、スクリューを
高アルミナ貿等のセラミックで構成したものが、先に本
出願人より特許出願されており（特願昭５９−２０９２
６８号）、実用化されつつある。As a measure to improve the wear resistance of the screw, the applicant has previously filed a patent application for a screw made of high-alumina ceramic (Japanese Patent Application No. 59-2092).
No. 68) is being put into practical use.
しかしながら、スクリューを内蔵するバレルについては
、耐圧強度等の点から、金属構成用材料が主流とされて
おり、バレルの耐摩耗性を改善する優れた技術について
の提案は、未だなされていないのが現状である。However, for barrels with built-in screws, metal construction materials are the mainstream in terms of pressure resistance, etc., and no proposals have been made for superior technology to improve the wear resistance of barrels. This is the current situation.
［問題を解決するための手段］
本発明は上記従来の実情に鑑み、押出成形機の耐摩耗性
を改善し、摩耗による問題を解決する押出成形機を提供
するものである。[Means for Solving the Problems] In view of the above-mentioned conventional circumstances, the present invention provides an extrusion molding machine that improves the wear resistance of the extrusion molding machine and solves problems caused by wear.
本発明の押出成形機は、バレル内にセラミックスクリユ
ーが挿設された押出成形機であって、バレルは金属製バ
レル本体に自己潤滑性を有する樹脂製インナーバレルを
間隙を設けて内嵌してなることを特徴とする−
［作用］
自己潤滑性を有する樹脂は、押出成形材料との動摩擦係
数が小さく、押出成形材料との接触抵抗が低いため、耐
摩耗性が著しく高い。しかも、一般に耐薬品性等にも優
わ、生理的に無害であると共に、耐衝撃性にも優れる。The extrusion molding machine of the present invention is an extrusion molding machine in which a ceramic screw is inserted into a barrel, and the barrel has a self-lubricating resin inner barrel fitted into a metal barrel body with a gap. - [Function] A self-lubricating resin has a low coefficient of dynamic friction with the extrusion molding material and low contact resistance with the extrusion molding material, so it has extremely high wear resistance. Moreover, it generally has excellent chemical resistance, etc., is physiologically harmless, and has excellent impact resistance.
本発明の押出成形機は、押出成形材料と接触するバレル
内表面が、自己潤滑性を有する樹脂よりなるインナーバ
レルで構成されているため、バレルの耐摩耗性が改善さ
れ、耐久性が向上する。In the extrusion molding machine of the present invention, the inner surface of the barrel that comes into contact with the extrusion molding material is composed of an inner barrel made of a self-lubricating resin, so that the wear resistance of the barrel is improved and the durability is improved. .
従って、摩耗により摩耗物質が製品に混入することは殆
どないが、たとい混入した場合においても、樹脂の無毒
性及び化学的安定性により、製品品質に悪影響を与える
ことは殆どない。Therefore, abrasive substances are unlikely to be mixed into the product due to wear, but even if they are mixed, the non-toxicity and chemical stability of the resin will hardly affect the quality of the product.
しかして、押出成形時の加圧力に対する耐圧性は、金属
製バレル本体により十分に補われる。Therefore, the pressure resistance against the pressure applied during extrusion molding is sufficiently compensated by the metal barrel body.
また、本発明の押出成形機は、スクリューがセラミック
製であるため、スクリューの摩耗の問題もない。Further, in the extrusion molding machine of the present invention, since the screw is made of ceramic, there is no problem of screw wear.
しかも、樹脂製インナーバレルとバレル本体との間に間
隙が形成されているため、インナーバレルとセラミック
スクリユーとの接触ないし小衝突による衝撃等をこの間
隙により吸収緩和することができ、セラミックスクリユ
ーの破損をも防止することができる。Moreover, since a gap is formed between the resin inner barrel and the barrel body, the impact caused by contact or small collision between the inner barrel and the ceramic screw can be absorbed and alleviated by this gap. It is also possible to prevent damage to the
ｒ カ 侍 ｌにｄｌ
以下図面を参照して本発明の実施例について詳細に説明
する。Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図及び第２図は本発明の一実施例に係る押出成形機
を示す図であって、第１図は一部断面図、第２図は第１
図の１１−１１線に沿う断面図である。1 and 2 are diagrams showing an extrusion molding machine according to an embodiment of the present invention, in which FIG. 1 is a partially sectional view, and FIG.
FIG. 2 is a cross-sectional view taken along line 11-11 in the figure.
本発明の押出成形機のバレルは、金属製バレル本体１と
バレル本体１に内嵌された自己潤滑性を有するインナー
バレル２とを備え、バレル本体１とインナーバレル２と
の間には間隙４が形成されている。３はセラミックスク
リユーである。The barrel of the extrusion molding machine of the present invention includes a metal barrel body 1 and a self-lubricating inner barrel 2 fitted into the barrel body 1, and there is a gap 4 between the barrel body 1 and the inner barrel 2. is formed. 3 is a ceramic screw.
インナーバレル２を構成する自己潤滑性を有する樹脂と
しては、ナイロン、フッ素樹脂、ポリエチレン、ポリア
セタール樹脂等が挙げられるが、本発明においては、Ｍ
ｅナイロンあるいは超高分子量ポリエチレン等の、耐摩
耗性を備えた動摩擦係数の極めて小さい自己潤滑性軟質
プラスチック材料が好ましく、とりわけ超高分子量ポリ
エチレンが最も好ましい。Examples of the self-lubricating resin constituting the inner barrel 2 include nylon, fluororesin, polyethylene, polyacetal resin, etc. In the present invention, M
A self-lubricating soft plastic material with wear resistance and a very low coefficient of dynamic friction, such as e-nylon or ultra-high molecular weight polyethylene, is preferred, with ultra-high molecular weight polyethylene being most preferred.
−す、全！頚バレル★イ太め仝Ｍネ第１１シ１．てＬ÷
従来よりバレル構成材料として用いられている、鋳鋼や
ステンレス鋼を用いることができる。-S-all! Neck barrel★Thick Mne 11th 1. teL÷
Cast steel and stainless steel, which have been conventionally used as barrel construction materials, can be used.
本発明においては、このような金属製バレル本体１に前
述の樹脂製インナーバレル２が両者間に間隙４を設けて
内嵌されている。このような間隙４を設けることにより
、セラミックスクリユー３とインナーバレル２との接触
、衝突による加圧、衝撃が吸収、緩和され、セラミック
スクリユー３の破損が防止される。In the present invention, the aforementioned resin inner barrel 2 is fitted into such a metal barrel body 1 with a gap 4 provided therebetween. By providing such a gap 4, pressure and impact caused by contact and collision between the ceramic screw 3 and the inner barrel 2 are absorbed and alleviated, and damage to the ceramic screw 3 is prevented.
即ち、一般にセラミックスクリユー３はバレル内に片持
ちで取り付けられているため、駆動開始時や押出成形材
料の坏土道通時の圧力によりスクリュー３の偏芯が起こ
る。このため、この偏芯によりスクリュー３はインナー
バレル２と接触ないし衝突する。スクリュー３とインナ
ーバレル２との接触ないし衝突は、スクリュー３の装着
、脱着時にも起こり得る。このような接触、衝突により
、セラミックスクリユー３はセラミックの脆性により割
れやチッピング等の破損を起こす。That is, since the ceramic screw 3 is generally mounted in a cantilevered manner within the barrel, eccentricity of the screw 3 occurs due to pressure at the start of driving or when the extruded material passes through the kneading path. Therefore, the screw 3 contacts or collides with the inner barrel 2 due to this eccentricity. Contact or collision between the screw 3 and the inner barrel 2 may also occur when the screw 3 is attached or detached. Such contact and collision causes damage to the ceramic screw 3 such as cracking and chipping due to the brittleness of the ceramic.
本発明においては、バレル本体１とインナーバレル２と
の間に間隙４が設けられているため、スクリュー３とイ
ンナーバレル２とが接触ないし衝突した際、インナーバ
レル２が間隙４の空間分だけ自由変形し、加圧ないしｆ
ｆＴｉ１を吸収緩和して、スクリュー３の破損を防止す
る。In the present invention, since the gap 4 is provided between the barrel body 1 and the inner barrel 2, when the screw 3 and the inner barrel 2 contact or collide, the inner barrel 2 is free by the space of the gap 4. Deformed, pressurized or f
Damage to the screw 3 is prevented by absorbing and relaxing fTi1.
なお、この間隙４は、インナーバレル２の自由変形のた
めの空間であると共に、言うまでもなく、バレル本体へ
の挿入時の嵌め合いのクリアランスの役割をも同時に担
っている。Incidentally, this gap 4 is a space for free deformation of the inner barrel 2, and needless to say, it also serves as a fitting clearance when inserted into the barrel body.
本発明において、間隙４の幅は、特に制限されず、押出
成形機の規模、使用目的等に応じて適宜決定されるが、
一般には幅０．５〜１．０ｍｍ程度の空隙となるように
するのが好ましい。In the present invention, the width of the gap 4 is not particularly limited, and is appropriately determined depending on the scale of the extrusion molding machine, the purpose of use, etc.
Generally, it is preferable that the gap has a width of about 0.5 to 1.0 mm.
本実施例においては、インナーバレル２にバレル長手方
向に延在する凹溝２ａが複数本（図においては６本）設
けられている。このような凹溝２ａを設けることにより
、押出成形材料の空回りを防止し、材料を良好に前進さ
せることができる。In this embodiment, the inner barrel 2 is provided with a plurality of grooves 2a (six in the figure) extending in the longitudinal direction of the barrel. By providing such a groove 2a, it is possible to prevent the extruded material from spinning idle and to advance the material favorably.
即ち、インナーバレル２を構成する樹脂は動摩擦係数が
小さく、材料との接触抵抗が小さいため、押出成形材料
の坏土が空回りして、バレル内を効率的に前進できない
場合があるが、図示の如く、インナーバレル２の内壁面
に凹溝２ａを設けることにより坏土の空回りを防ぎ、前
進を促進することができる。In other words, since the resin constituting the inner barrel 2 has a small coefficient of dynamic friction and low contact resistance with the material, the extrusion molding material may spin idle and be unable to advance efficiently inside the barrel. By providing the grooves 2a on the inner wall surface of the inner barrel 2, it is possible to prevent the clay from spinning idle and to promote forward movement.
凹溝２ａの大きさ等は特に制限されず、押出成形機の規
模や使用目的等により適宜決定されるが、例えば厚さ１
０ｍｍ程度のインナーバレルに対しては、深さ３ｍｍ、
幅１０ｍｍ程度の凹溝をバレル長手方向に設けるのが好
ましい。The size of the groove 2a is not particularly limited, and is appropriately determined depending on the scale of the extrusion molding machine and the purpose of use.
For an inner barrel of about 0mm, the depth is 3mm,
It is preferable to provide a groove with a width of about 10 mm in the longitudinal direction of the barrel.
なお、坏土の空回り防止及び前進促進のためには、イン
ナーバレル２の内壁面に適当な凹凸が形成されていれば
良く、第２図のような凹溝２ａに限らず、バレル長手方
向に延在する凸条、その他適当な形状の凹部又は凸部で
あっても良い。In order to prevent the clay from idling and promote its forward movement, it is sufficient to form appropriate irregularities on the inner wall surface of the inner barrel 2, and it is not limited to the grooves 2a as shown in FIG. It may be an extending protrusion, or a concave or convex portion of any other suitable shape.
本実施例において、セラミックスクリユー３は、軸部３
ａ及びこの軸部３ａの周面から突起する螺子羽根３ｂを
有する。軸部３ａは金属製の軸心部分とセラミック剪の
べ側部分とから―乙−中！子羽根３ｂはセラミック族で
あり、軸部３ａのセラミック族の外側部分と一体的に形
成されている。In this embodiment, the ceramic screw 3 has a shaft portion 3.
a and a screw blade 3b protruding from the circumferential surface of the shaft portion 3a. The shaft portion 3a consists of a metal shaft center portion and a ceramic shearing side portion. The child blade 3b is made of ceramic and is integrally formed with the ceramic outer portion of the shaft portion 3a.
なお、スクリューは、螺子羽根３ｂだけをセラミック族
とし、軸部３ａは全て金属製としても良いのであるが、
軸部３ａの周面も原料と接触するものであること、及び
螺子羽根を軸部に取り付ける手間を省略しつることから
、軸部３ａの外側部分と螺子羽根部３ｂとを一体のセラ
ミック族とし、このセラミックの一体物を軸心部分に結
合するようにするのが好ましい。In addition, the screw may be made of a ceramic group only for the screw blades 3b, and the entire shaft portion 3a may be made of metal.
Since the peripheral surface of the shaft portion 3a is also in contact with the raw material and the effort of attaching the screw blades to the shaft portion is omitted, the outer portion of the shaft portion 3a and the screw blade portion 3b are made of an integral ceramic type. Preferably, this ceramic monolith is bonded to the shaft portion.
スクリューを構成するセラミック材としては、耐摩耗性
の高いアルミナ質、ジルコニア質、窒化珪素質等の焼結
体が好ましいが、特にＡｊ２２０３含有率が８０重量％
以上のアルミナ質のものが好ましく、とりわけ耐摩耗性
及び耐′ａ撃性の優れたＡＩＬ２０ｓ含有率８５〜９６
重量％のものが好ましい。Ａｊ！２０ｓ含有量が８０重
量％未満では耐摩耗性に劣り、逆にＡｊ２２０３含有量
があまりに高い場合には耐衝撃性及びその成形性に難が
有る。The ceramic material constituting the screw is preferably a sintered body of alumina, zirconia, silicon nitride, etc., which have high wear resistance, but in particular a sintered body with an Aj2203 content of 80% by weight.
The above alumina materials are preferable, especially those with AIL20s content of 85 to 96, which have excellent wear resistance and abrasion resistance.
% by weight is preferred. Aj! If the 20s content is less than 80% by weight, the wear resistance will be poor, and if the Aj2203 content is too high, the impact resistance and moldability will be poor.
なおＡｌ１０３以外に、５ｉ０２．ＣａＯ１Ｍｇ０１Ｔ
ｉＯ２、ＺｒＯ２など通常の酸化物焼結体に含まれる各
種の酸化物を含み得る。また、少量であれば窒化物、ホ
ウ化物を含んでも良い。In addition to Al103, 5i02. CaO1Mg01T
It may contain various oxides contained in ordinary oxide sintered bodies, such as iO2 and ZrO2. Further, nitrides and borides may be included as long as they are in small amounts.
このアルミナ質の焼結体は、吸水率が１％以下とりわけ
０．１％以下のものが好ましい。吸水率が１％よりも大
きいと、スクリュー表面への原料の＠き付き現象が発生
し、発熱、押出機能の極端な低下を誂発し好ましくない
。The alumina sintered body preferably has a water absorption rate of 1% or less, especially 0.1% or less. If the water absorption rate is greater than 1%, the phenomenon of sticking of the raw material to the screw surface occurs, which is undesirable as it causes heat generation and an extreme decrease in the extrusion function.
以下、実験例について説明する。An experimental example will be explained below.
実験例１
超高分子量ポリエチレン（「ニューライト」作新工業■
製、平均分子量３５０万以上）製インナーバレルを備え
た本発明の押出成形機と、従来の５ＵＳ３０４ステンレ
ス製バレルを備えた押出成形機について、耐摩耗性試験
を行なった。Experimental example 1 Ultra-high molecular weight polyethylene (“New Light” Sakushin Kogyo ■
Abrasion resistance tests were conducted on an extrusion molding machine of the present invention equipped with an inner barrel made of 500% aluminum alloy with an average molecular weight of 3.5 million or more) and an extrusion molding machine equipped with a conventional 5US304 stainless steel barrel.
即ち、平均粒子径３５〜５０μｍ程度のα−Ａｊ１２０
ａ（焼成アルミナ）粒子を主成分（９６重量％）とし、
含水率２５〜３０重量％程度に調製した押出し用坏土を
、下記運転条件にて、直径７〜１０ｍｍφのチューブ状
に押出成形を行ない、押出成形した坏±（アルミナ乾粉
量換算）の量に対する、各押出成形機のバレルの摩耗量
（摩耗厚さ）を調べた。なお、摩耗量の測定点は、摩耗
量が最大となる吐出口に近いオーガーバレル（内径５０
ｍｍφ）内面とした。That is, α-Aj120 with an average particle diameter of about 35 to 50 μm
a (calcined alumina) particles as the main component (96% by weight),
Extrusion clay prepared to have a water content of about 25 to 30% by weight was extruded into a tube shape with a diameter of 7 to 10 mmφ under the following operating conditions, and the amount of extruded clay (converted to the amount of alumina dry powder) The amount of wear (wear thickness) on the barrel of each extruder was investigated. The measurement point for the amount of wear was the auger barrel (inner diameter 50 mm) near the discharge port where the amount of wear was maximum.
mmφ) inner surface.
運転条件 オーガースクリュー回転数；２０〜２５ ｒ、ｐ、ｍ。Operating conditions Auger screw rotation speed: 20-25 r, p, m.
押出量二含水２９〜３１ ｋ ｇ ／ ｈ ｒ結果を第
３図に示す。The results are shown in FIG. 3: extrusion rate: water content: 29-31 kg/hr.
第３図より、本発明の押出成形機は、バレルの摩耗量が
極めて少なく、従来のステンレス製バレルに比し８〜１
０倍と著しく耐摩耗性が向上していることが明らかであ
る。From Figure 3, the extrusion molding machine of the present invention has extremely low barrel wear, 8 to 1
It is clear that the wear resistance is significantly improved by 0 times.
実験例２
アルミナ貿セラミックスクリユー及び超高分子量ポリエ
チレンにニューライト）製インナーバレルを備えた本発
明の押出成形機と、５ＵＳ３０４ステンレス製スクリユ
ー及び５ＵＳ３０４ステンレス製バレルを備えた従来の
押出成形機について、摩耗による製品への悪影響を調べ
た。なお、本例において、インナーバレルとバレル本体
との間の間隙の幅は約０．７ｍｍとした。Experimental Example 2 Regarding an extrusion molding machine of the present invention equipped with an inner barrel made of alumina trade ceramic screw and ultra-high molecular weight polyethylene (Newrite), and a conventional extrusion molding machine equipped with a 5US304 stainless steel screw and a 5US304 stainless steel barrel, We investigated the negative effects of wear on the product. In this example, the width of the gap between the inner barrel and the barrel body was approximately 0.7 mm.
即ち、実験例１で用いた坏土を実験例１と同様に各々の
押出成形機で押出成形し、得られた押出しチューブを１
５００℃で焼成して多孔質体を得、このものについて色
調及び白瓜を色差計で測定して比較検討した。That is, the clay used in Experimental Example 1 was extruded using each extruder in the same manner as Experimental Example 1, and the obtained extruded tube was
A porous body was obtained by firing at 500°C, and the color tone and white melon of this body were measured using a color difference meter and compared.
結果を第１表に示す。The results are shown in Table 1.
第１表
笛１１ｇｒｓＡ４、Ｈ日Ａｒ）ｆｐＪ−へＬ−Ｎ車／７
”１７’？−ｉ＋ｉスバレル及びステンレススクリュー
の押出成形機によるものは、淡桃色がかっており（これ
は、発光分光分析結果より、ステンレス成分のＣｒ、Ｎ
ｉの含有量が高くなっているためであることが判明した
。）、本発明によるものは、白くすけるような感じを与
えた。Table 1 Whistle 11 grs A4, H day Ar) L-N car to fpJ-/7
``17''?-i+i Stainless steel screw extrusion molding machine has a pale pink color (according to the results of emission spectroscopy, this is due to the stainless steel components Cr and N.
It turned out that this was due to the high content of i. ), the one according to the present invention gave a white and dull feeling.
この結果、本発明の押出成形機によれば、バレルやスク
リューの摩耗により、製品に悪影響を与えることがない
ことが明らかである。As a result, it is clear that the extrusion molding machine of the present invention does not adversely affect the product due to wear of the barrel or screw.
なお、以上の実験において、セラミックスクリユーの（
偏芯が起きても、インナーバレルの自由変形により、衝
撃が緩和され、セラミックスクリユーが破損することは
なかった。In addition, in the above experiments, the ceramic screw (
Even if eccentricity occurred, the free deformation of the inner barrel cushioned the impact and the ceramic screw was not damaged.
［発明の効果］
以上詳述した通り、本発明の押出成形機は、セラミック
スクリユーと、金属製バレル本体及びこれに間隙を設け
て内嵌された自己潤滑性を有する樹脂製インナーバレル
とを備えたバレルと、を有するものであって、スクリュ
ーの耐摩耗性が優れる上に、押出成形材料と接触するバ
レル内壁面の潤滑性を向上させることができ、接触抵抗
が非常に小さくなるため、バレルの摩耗が大幅に低減さ
れる。しかも、セラミックスクリユーとインナーバレル
との衝突による衝撃もインナーバレルとバレル本体との
間の間隙により緩和される。[Effects of the Invention] As detailed above, the extrusion molding machine of the present invention includes a ceramic screw, a metal barrel body, and a self-lubricating resin inner barrel fitted inside the metal barrel body with a gap. It has a barrel equipped with a screw, which not only has excellent wear resistance of the screw, but also improves the lubricity of the inner wall surface of the barrel that comes into contact with the extrusion molding material, and the contact resistance becomes extremely small. Barrel wear is significantly reduced. Furthermore, the impact caused by the collision between the ceramic screw and the inner barrel is also alleviated by the gap between the inner barrel and the barrel body.
このため、
■ バレルの寿命が延長され、交換頻度が低減されるた
め、安定した押出成形条件で効率的な押出成形を行なう
ことが可能とされる。Therefore, (1) the life of the barrel is extended and the frequency of replacement is reduced, making it possible to carry out efficient extrusion molding under stable extrusion conditions.
■ インナーバレルを構成する樹脂自体が金属に比し軽
量である上に、耐摩耗性が向上されたことによりバレル
全体を薄肉化することができるため、押出成形機の軽量
化及び小型化を図ることができる。このため、押出成形
機の分解、組立、メンテナンス等の際の作業性、取扱い
性も向上する。■ The resin that makes up the inner barrel itself is lighter than metal and has improved wear resistance, making it possible to make the entire barrel thinner, making the extrusion molding machine lighter and more compact. be able to. Therefore, the workability and handling efficiency during disassembly, assembly, maintenance, etc. of the extrusion molding machine are also improved.
■ 摩耗が少ない上に、インナーバレルが化学的に安定
で、無毒性の樹脂製であるため、万一摩耗物質が製品中
に混入した場合においても製品に悪影響を及ぼすことは
ない。■ In addition to low wear, the inner barrel is made of chemically stable and non-toxic resin, so even if abrasive substances should get mixed into the product, it will not have a negative effect on the product.
■ セラミックスクリユーとインナーバレルとの接触な
いし衝突による破損も有効に防止される。■ Damage caused by contact or collision between the ceramic screw and the inner barrel is effectively prevented.
等の効果が奏され、良好な作業効率のもとに、低コスト
で高品質の押出成形品を製造することが可能となる。These effects are achieved, and it becomes possible to manufacture high-quality extrusion molded products at low cost with good work efficiency.
特に、インナーバレル内壁面に凹部及び／又は凸部を形
成することにより、押出成形材料の効率的な押出しが可
能とされるため、動力の節減が可能となり、ランニング
コストの大幅な低減が図れ、極めて有利である。In particular, by forming recesses and/or protrusions on the inner wall surface of the inner barrel, it is possible to extrude the extrusion molding material efficiently, which makes it possible to save power and significantly reduce running costs. Extremely advantageous.
第１図及び第２図は本発明の実施例に係る押出成形機の
バレル部の図であって、第１図は断面図、第２図は第１
図のＩＩ −ＩＩ線に沿う断面図である。第３図は実験
例１で得られた耐摩耗試験結果を示すグラフである。
１・・・バレル本体、 ２・・・インナーバレル
、３・・・スクリュー、 ４・・・間隙。
代 理 人 弁理士 重 野 剛図面の浄書（内
容に変更なし）
第３図
押出し量（アルミナ馳粉換算）［ｔＯｎ１手続補手続補
正式）
％式％
１ 事件の表示
昭和６２年特許Ｉｊｉ第２５１９４号
２ 発明の名称
樹脂製インナーバレルを有する押出成形機３ 補正をす
る者
事件との関係 特許出願人
名 称（４２９）株式会社ノリタケカンパニーリミテド
４ 代理人
住 所 東京都港区赤坂４丁目８番１９号〒１０
７ 赤坂表町ビル５０２号
以上
＋ 、、’１
外−−５）1 and 2 are views of the barrel portion of an extrusion molding machine according to an embodiment of the present invention, in which FIG. 1 is a sectional view and FIG.
FIG. 2 is a sectional view taken along line II-II in the figure. FIG. 3 is a graph showing the wear resistance test results obtained in Experimental Example 1. 1... Barrel body, 2... Inner barrel, 3... Screw, 4... Gap. Agent Patent Attorney Tsuyoshi Shigeno Engraving of the drawings (no changes to the content) Figure 3 Extrusion amount (alumina powder conversion) [tOn1 supplementary procedure amendment formula] % formula % 1 Indication of the case 1988 Patent Iji No. 25194 No. 2 Name of the invention Extrusion molding machine with resin inner barrel 3 Relationship to the case of the person making the amendment Patent applicant name (429) Noritake Co., Ltd. Company Limited 4 Agent address 4-8-19 Akasaka, Minato-ku, Tokyo No. 10
7 Akasaka Omotemachi Building No. 502 and above + ,, '1 Outside - 5)
Claims (5)
出成形機において、該バレルが金属製バレル本体と、該
金属製バレル本体に内嵌された自己潤滑性を有する樹脂
製インナーバレルとを備えてなり、該金属製バレル本体
と樹脂製インナーバレルとの間に間隙が形成されている
ことを特徴とする樹脂製インナーバレルを有する押出成
形機。(1) In an extrusion molding machine in which a ceramic screw is inserted into a barrel, the barrel includes a metal barrel body and a self-lubricating resin inner barrel fitted inside the metal barrel body. An extrusion molding machine having a resin inner barrel, characterized in that a gap is formed between the metal barrel body and the resin inner barrel.
／又は凸部が設けられていることを特徴とする特許請求
の範囲第１項に記載の押出成形機。(2) The extrusion molding machine according to claim 1, wherein the resin inner barrel has a concave portion and/or a convex portion on its inner wall surface.
長手方向に延設された凹溝及び／又は凸条であることを
特徴とする特許請求の範囲第２項に記載の押出成形機。(3) The extrusion molding machine according to claim 2, wherein the concave portion and/or the convex portion are grooves and/or protrusions extending in the longitudinal direction of the resin inner barrel. .
レンであることを特徴とする特許請求の範囲第１項ない
し第３項のいずれか１項に記載の押出成形機。(4) The extrusion molding machine according to any one of claims 1 to 3, wherein the self-lubricating resin is ultra-high molecular weight polyethylene.
から突起する螺子羽根を有し、少なくとも螺子羽根がセ
ラミック製とされていることを特徴とする特許請求の範
囲第１項ないし第４項のいずれか１項に記載の押出成形
機。(5) The ceramic screw has a shaft portion and a screw blade protruding from the circumferential surface of the shaft portion, and at least the screw blade is made of ceramic. The extrusion molding machine according to any one of the above items.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62025194A JPH062365B2 (en) | 1987-02-05 | 1987-02-05 | Extruder with resin inner barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62025194A JPH062365B2 (en) | 1987-02-05 | 1987-02-05 | Extruder with resin inner barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63193817A true JPS63193817A (en) | 1988-08-11 |
| JPH062365B2 JPH062365B2 (en) | 1994-01-12 |
Family
ID=12159154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62025194A Expired - Fee Related JPH062365B2 (en) | 1987-02-05 | 1987-02-05 | Extruder with resin inner barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH062365B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506657A (en) * | 1972-11-18 | 1975-01-23 | ||
| JPS61241104A (en) * | 1985-04-18 | 1986-10-27 | 株式会社ノリタケカンパニーリミテド | Screw for extruding machine or kneading machine |
-
1987
- 1987-02-05 JP JP62025194A patent/JPH062365B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506657A (en) * | 1972-11-18 | 1975-01-23 | ||
| JPS61241104A (en) * | 1985-04-18 | 1986-10-27 | 株式会社ノリタケカンパニーリミテド | Screw for extruding machine or kneading machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH062365B2 (en) | 1994-01-12 |
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