JPH01188319A - Screw for plastic working device and method of applying abrasion-resistant layer - Google Patents
Screw for plastic working device and method of applying abrasion-resistant layerInfo
- Publication number
- JPH01188319A JPH01188319A JP63304282A JP30428288A JPH01188319A JP H01188319 A JPH01188319 A JP H01188319A JP 63304282 A JP63304282 A JP 63304282A JP 30428288 A JP30428288 A JP 30428288A JP H01188319 A JPH01188319 A JP H01188319A
- Authority
- JP
- Japan
- Prior art keywords
- wear
- screw
- resistant layer
- land
- layer
- 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
- 238000000034 method Methods 0.000 title claims description 15
- 239000004033 plastic Substances 0.000 title claims description 9
- 229920003023 plastic Polymers 0.000 title claims description 9
- 238000005299 abrasion Methods 0.000 title 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 239000011733 molybdenum Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 7
- 238000007751 thermal spraying Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 abstract description 10
- 230000008018 melting Effects 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000010285 flame spraying Methods 0.000 abstract 2
- 238000003466 welding Methods 0.000 description 8
- 238000007750 plasma spraying Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/354—Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/60—Screws
-
- 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
- B29C48/507—Screws characterised by the material or their manufacturing process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Injection Moulding Of Plastics Or The Like (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、請求項１の前提部に記載された種類のプラス
チック加工装置用のスクリュ、評言すればスクリュラン
ドの摺動面上に熱吹付けによって被着された、耐摩耗性
合金からなる耐摩耗性層を有する、プラスチック加工装
置用のスクリュ、ならびにこのようなスクリュの耐摩耗
性層を被着させる方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a thermal blowing method on the sliding surface of a screw, preferably a screw land, for a plastic processing device of the kind stated in the preamble of claim 1. The present invention relates to a screw for plastic processing equipment having a wear-resistant layer of a wear-resistant alloy applied by coating, as well as a method for applying the wear-resistant layer of such a screw.
プラスチック加工装置中のスクリュ、殊に押出スクリュ
は、運転中にプラスチック溶融液および殊にシリンダ壁
での直接の摩擦による著しい摩耗を受ける。このことは
、特に二軸スクリュ押出機に該当する。それというのも
、これらの二軸スクリュ押出機は、溶融圧により曲げ負
荷にさらされているからである。Screws in plastics processing equipment, in particular extrusion screws, are subject to considerable wear during operation due to the plastic melt and, in particular, direct friction on the cylinder walls. This applies in particular to twin-screw extruders. This is because these twin screw extruders are subjected to bending loads due to melt pressure.
約２０年来、押出スクリュのランド（Ｓｔｅｇｅ）に溶
射法、のちにはプラズマ溶射法をも用いて耐摩耗性層を
備えることが公知である。この方法の場合、種々の金属
および金属酸化物ならびに金属合金を吹付は材料として
使用することができる。吹付は層が塗布される基面は、
あらかじめ粗面化することを必要とし、この粗面化はた
いていの場合、サンドブラストにより達成される。It has been known for about 20 years to provide the lands of extrusion screws with a wear-resistant layer by thermal spraying, and later also by plasma spraying. In this method, various metals and metal oxides and metal alloys can be used as spray materials. In spraying, the base surface to which the layer is applied is
Pre-roughening is required, and this roughening is most often achieved by sandblasting.
しかしながら、この吹付は層は基面と密な化学的結合を
成立しない。基面の冶金学的溶融、ひいては表面溶融ま
たは融合による吹付は層と基面との結合は生じない。基
面上での吹付は層の付着は、粗面化された基面中での吹
付は金属粒子の機械的食込みから得られる。However, this spraying does not allow the layer to form a tight chemical bond with the substrate. Metallurgical melting of the base and thus spraying by surface melting or fusion does not result in a bond between the layer and the base. The deposition of the layer on the base surface results from the mechanical penetration of the metal particles in the roughened base surface.
基面上での吹付は層のこの機械的、純物理的外
な付着は、特定の卯力下では吹付は層の剥落を生じる結
果となる。さらに、腐食性媒体による吹付は層への浸透
が可能である。This mechanical and purely physical adhesion of the layer by spraying onto the base surface results in the spraying causing flaking of the layer under certain forces. Furthermore, spraying with corrosive media is capable of penetrating the layer.
溶射−またはプラズマ溶射によって被着された層の上記
の欠点を回避するためには、耐摩耗性層を肉盛溶接、殊
に粉末溶接法により被着させる方法が開発された。この
場合には実際に、耐摩耗性層と基面との間の所望の冶金
学的結合を得ることができるが、しかし別の欠点が生じ
る。In order to avoid the above-mentioned disadvantages of layers applied by thermal spraying or plasma spraying, methods have been developed in which wear-resistant layers are applied by overlay welding, in particular by powder welding. Although in this case it is indeed possible to obtain the desired metallurgical bond between the wear-resistant layer and the base surface, other disadvantages arise.
溶接浴が溶接過程の間、流出しないよってするためには
、スクリュランドは両側縁のウェブによって仕切られた
溝を備えていなげればならない。In order to ensure that the welding bath does not flow out during the welding process, the screw land must be provided with grooves bounded by webs on both sides.
４粍の観点で所望される高いモリブデン含分が含まれて
いる粉末（または電極）を用いて溶接することは問題で
ある。それというのも亀裂形成の危険が生じるからであ
る。この危険には、電極中のモリブデン含量を減少させ
ることによってのみ対処することができるが、しかしこ
れにより耐摩耗性層の潤滑特性ないしは非常運転特性は
損われる。摩耗によって除去されたスクリュランドを肉
盛溶接することにより摩耗スクリュを再生することは、
不経済である。溶接に必要とされる、スクリュランドの
予備加工および後処理は、規模が大きすぎる。Welding with powders (or electrodes) containing the desired high molybdenum content from a metal perspective is problematic. This is because there is a risk of crack formation. This risk can only be countered by reducing the molybdenum content in the electrode, but the lubricating properties or emergency operating properties of the wear-resistant layer are thereby impaired. Regenerating a worn screw by overlaying the screw land removed due to wear,
It is uneconomical. The preliminary and post-processing of the screw lands required for welding is too extensive.
本発明の根底をなす課題は、前記種類のスクリュならび
に耐摩耗性層を被着させる方法を、耐摩耗性層の材料選
択および／またはスクリュランドの形状に関する制限を
甘受する必要なしに、簡単な手段を用いて耐摩耗性層と
基面との良好な結合が得られるよって改善することであ
る。The problem underlying the invention is to provide a method for applying a screw of the above-mentioned type and a wear-resistant layer in a simple manner without having to accept any restrictions regarding the material selection of the wear-resistant layer and/or the shape of the screw land. It is an object of the present invention to improve the bonding between the wear-resistant layer and the base surface by means of the present invention.
上記の課題は、本発明によれば請求項１０脣徴邪に記載
された特徴、すなわち耐摩耗性層がレーザビーム処理に
より、スクリュランドの材料中に溶封されていることに
より解決される。According to the invention, the above-mentioned object is solved by the features set forth in claim 10, namely that the wear-resistant layer is sealed into the material of the screw land by laser beam treatment.
本発明によるスクリュの他の有利な構成は、請求項２か
も４までに記載されている。Further advantageous embodiments of the screw according to the invention are described in claims 2 and 4.
さらに上記の課題は、本発明によれば十分な耐摩耗性を
有する金属、殊にモリブデンまたは主としてモリブデン
を含有する合金からなる耐摩耗性層を、熱吹付けにより
スクリュランドの摺動面上に被着させるととにより、プ
ラスチック加工装置用の押出スクリュのスクリュランド
上に耐摩耗性層を被着させる方法において、耐摩耗性層
を高出力レーザを用いる処理により圧縮し、かつ溶封に
よりスクリュランドの材料と冶金学的に結合させること
を特徴とする、耐摩耗性層を被着させる方法により解決
される。Furthermore, according to the present invention, the above-mentioned problem is solved by applying a wear-resistant layer made of a metal having sufficient wear resistance, particularly molybdenum or an alloy mainly containing molybdenum, onto the sliding surface of the screw land by thermal spraying. In a method of depositing a wear-resistant layer on the screw land of an extrusion screw for plastic processing equipment, the wear-resistant layer is compressed by a process using a high-power laser and the screw is bonded by melt-sealing. The problem is solved by a method of applying a wear-resistant layer, which is characterized by a metallurgical bond with the material of the land.
吹付は層を高出力レーザにより後処理することは、自体
公知である（ ” Ｍｅｔａｌｌ−ｏｂｅｒｆｌＫｃｈ
ｅ４１（１９８７年）７、第６２９〜６６２頁〕。It is known per se that the spraying layer is subsequently treated with a high-power laser ("Metall-oberflKch").
e41 (1987) 7, pp. 629-662].
しかしながら、押出スクリュに対して使用することは、
これまで未知の特別な利点をもたらしかつ殊に耐摩耗性
層を側縁を含め、スクリュランドの全幅にわたり被着さ
せることを可能とする。However, use for extrusion screws is
It offers special advantages hitherto unknown and in particular makes it possible to apply a wear-resistant layer over the entire width of the screw land, including the side edges.
次に本発明の１実施例を、添付図面につき詳説する。One embodiment of the invention will now be described in detail with reference to the accompanying drawings.
スクリュ１のスクリュランド３は、その摺動面上に有利
に純粋なモリブデンからなる耐摩耗性層５を備えており
、この層は熱吹付は法、すなわち殊に溶射またはプラズ
マ溶射により被着されている。適当な方法で収束される
高出力レーザ９のレーザビーム７により後処理が行なわ
れ、これによりレーザ焦点内で耐摩耗性層５の溶融も、
基面の溶融も行なわれる。これによって、耐摩耗性層と
基面とを冶金学的に結合する溶接層ないしは合金層１１
が形成される。同時に、吹付は後もなお多孔性の層５は
圧縮される。The screw land 3 of the screw 1 is provided on its sliding surface with a wear-resistant layer 5, preferably made of pure molybdenum, which is applied by thermal spraying, in particular thermal spraying or plasma spraying. ing. Post-treatment is carried out by means of a laser beam 7 of a high-power laser 9 which is focused in a suitable manner, so that the wear-resistant layer 5 is also melted in the laser focus.
Melting of the base surface also takes place. This results in a welding layer or alloy layer 11 that metallurgically connects the wear-resistant layer and the base surface.
is formed. At the same time, the still porous layer 5 is compressed after spraying.
管１３により、保護ガスを供給することができる。A protective gas can be supplied by the tube 13.
本発明方法の場合、スクリュランドに側縁ウェブによっ
て仕切られる溝を構成することは、もはや必要でない。With the inventive method, it is no longer necessary to construct grooves in the screw land that are bounded by side edge webs.
耐摩耗性層は、スクリュランドの全幅にわり延びかつ耐
摩耗作用を殊にランドの側縁でも保証することができる
。レーザビーム７の運動および／または出力は、耐摩耗
性層５および基面とのその結合がランド側縁の範囲内で
特に補強されるように制御することができる。The wear-resistant layer can extend over the entire width of the screw land and ensure a wear-resistant effect, especially on the side edges of the land. The movement and/or the power of the laser beam 7 can be controlled such that the wear-resistant layer 5 and its bond with the base surface are particularly reinforced in the area of the land edges.
本発明方法は、層の溶射およびレーザビームを用いる溶
封が１作業工程で実施されるように構成することもでき
る。The method of the invention can also be configured such that spraying the layer and sealing with a laser beam are carried out in one operation step.
耐摩耗性層５の厚さは、図面では過大に図示されている
。耐摩耗性層と基面との密な結合のため、耐摩耗性層の
厚さを、これまで可能であったよりも小さく選択するこ
とができることは、本発明の１つの特別な利点である。The thickness of the wear-resistant layer 5 is overdrawn in the drawing. It is one particular advantage of the invention that, because of the tight bond between the wear-resistant layer and the base surface, the thickness of the wear-resistant layer can be chosen smaller than hitherto possible.
最大０．５１！ＩＫ。Maximum 0.51! I.K.
特に０．２〜０．４」の厚さは、たいていの目的には十
分であると思われる。In particular, a thickness of 0.2-0.4'' appears to be sufficient for most purposes.
また、本発明による方法は、既に摩耗によって使用不可
能となったスクリュを、耐摩耗性層を新しくす゛ること
によって再生させるためにも適当である。The method according to the invention is also suitable for regenerating screws that have already become unusable due to wear, by renewing the wear-resistant layer.
添付図面は、レーザ後処理する間の本発明によるスクリ
ュを示す部分的略示断面図である。
１・・・スクリュ、３・・・スクリュランド、５・・・
耐摩耗性層、７・・・レーザビーム、９・・・高出力レ
ーザ、１１・・・溶接層、１３・・・管
１・・・スクリュ
２・・・スクリュランＰ
３・・・耐摩耗性層The accompanying drawing is a partially schematic sectional view showing a screw according to the invention during laser post-treatment. 1...screw, 3...screw land, 5...
Wear-resistant layer, 7... Laser beam, 9... High-power laser, 11... Welding layer, 13... Pipe 1... Screw 2... Screw run P 3... Wear resistance layer
Claims (1)
された、耐摩耗性合金からなる耐摩耗性層を有する、プ
ラスチツク加工装置用のスクリュにおいて、耐摩耗性層
がレーザビーム処理によりスクリュランドの材料中に溶
封されていることを特徴とする、プラスチツク加工装置
用のスクリュ。 ２、耐摩耗性層が、側縁部を含めスクリュランドの摺動
面の全幅にわたり延びている、請求項１記載のスクリュ
。 ３、耐摩耗性層はランドの側縁部で補強されており、か
つ／または摺動面の中心部よりも強く基面と融合されて
いる、請求項２記載のスクリュ。 ４、耐摩耗性層が、モリブデンまたは主としてモリブデ
ンを含有する合金からなる、請求項１から３までのいず
れか１項記載のスクリュ。 ５、十分な耐摩耗性を有する金属からなる耐摩耗性層を
熱吹付けによつてスクリュランドの摺動面上に被着させ
ることにより、プラスチツク加工装置用の押出スクリュ
のスクリュランド上に耐摩耗性層を被着させる方法にお
いて、該耐摩耗性層を、高出力レーザを用いる処理によ
り圧縮しかつ溶封によりスクリュランドの材料と冶金学
的に結合させることを特徴とする、耐摩耗性層を被着さ
せる方法。[Scope of Claims] 1. A screw for plastic processing equipment, which has a wear-resistant layer made of a wear-resistant alloy that is deposited on the sliding surface of the screw land by thermal spraying. 1. A screw for plastic processing equipment, characterized in that a magnetic layer is melt-sealed into the material of the screw land by laser beam treatment. 2. The screw according to claim 1, wherein the wear-resistant layer extends over the entire width of the sliding surface of the screw land, including the side edges. 3. The screw according to claim 2, wherein the wear-resistant layer is reinforced at the side edges of the land and/or is more strongly fused to the base surface than at the center of the sliding surface. 4. The screw according to claim 1, wherein the wear-resistant layer consists of molybdenum or an alloy containing mainly molybdenum. 5. A wear-resistant layer made of a metal with sufficient wear resistance is deposited on the sliding surface of the screw land by thermal spraying, thereby creating a wear-resistant layer on the screw land of an extrusion screw for plastic processing equipment. A method for applying an abrasive layer, characterized in that the abrasive layer is compressed by a treatment using a high-power laser and metallurgically bonded to the material of the screw land by melt-sealing. Method of applying layers.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873740916 DE3740916A1 (en) | 1987-12-03 | 1987-12-03 | Screw with wear-protection layer for plastics processing machines, and method of applying the protection layer |
| DE3740916.6 | 1987-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01188319A true JPH01188319A (en) | 1989-07-27 |
Family
ID=6341770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63304282A Pending JPH01188319A (en) | 1987-12-03 | 1988-12-02 | Screw for plastic working device and method of applying abrasion-resistant layer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH01188319A (en) |
| DE (1) | DE3740916A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0568626U (en) * | 1992-02-24 | 1993-09-17 | 株式会社名機製作所 | Injection molding machine screw |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3943344C1 (en) * | 1989-12-29 | 1990-10-04 | Arenz Gmbh, 5309 Meckenheim, De | Worm unit for plastic working machine e.g. extruder - has wear resistant unit on worm section head |
| DE59201161D1 (en) * | 1991-02-02 | 1995-02-23 | Theysohn Friedrich Fa | Process for producing a wear-reducing layer. |
| DE4141317C1 (en) * | 1991-02-02 | 1992-07-02 | Friedrich Theysohn Gmbh, 3012 Langenhagen, De | Prodn. of wear-reducing coating to reduce cracking and distortion - for screw surface in e.g. plastic extruder comprises introducing molybdenum@-contg. material into laser beam and depositing on steel body |
| US5198268A (en) * | 1991-11-14 | 1993-03-30 | Xaloy, Incorporated | Method for preparing a feed screw for processing plastics |
| AT402943B (en) * | 1995-10-04 | 1997-09-25 | Engel Gmbh Maschbau | METHOD FOR PRODUCING WEAR AND CORROSION PROTECTED SURFACES ON PLASTICIZING SCREWS FOR INJECTION MOLDING MACHINES |
| US6486432B1 (en) | 1999-11-23 | 2002-11-26 | Spirex | Method and laser cladding of plasticating barrels |
| EP1215033A1 (en) * | 2000-12-12 | 2002-06-19 | Paul N. Colby | Method for laser cladding of plasticating barrels |
| US9168613B2 (en) | 2010-10-22 | 2015-10-27 | Paul T. Colby | Vertical laser cladding system |
| KR20160036103A (en) * | 2012-02-24 | 2016-04-01 | 더 프록터 앤드 갬블 캄파니 | Method of molding a thin walled part |
| CN104550955B (en) * | 2014-12-26 | 2017-03-08 | 浙江工业大学 | A kind of process manufacturing for screw rod laser in combination |
-
1987
- 1987-12-03 DE DE19873740916 patent/DE3740916A1/en not_active Withdrawn
-
1988
- 1988-12-02 JP JP63304282A patent/JPH01188319A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0568626U (en) * | 1992-02-24 | 1993-09-17 | 株式会社名機製作所 | Injection molding machine screw |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3740916A1 (en) | 1989-06-15 |
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