DE3740916A1 - Screw with wear-protection layer for plastics processing machines, and method of applying the protection layer - Google Patents

Screw with wear-protection layer for plastics processing machines, and method of applying the protection layer

Info

Publication number
DE3740916A1
DE3740916A1 DE19873740916 DE3740916A DE3740916A1 DE 3740916 A1 DE3740916 A1 DE 3740916A1 DE 19873740916 DE19873740916 DE 19873740916 DE 3740916 A DE3740916 A DE 3740916A DE 3740916 A1 DE3740916 A1 DE 3740916A1
Authority
DE
Germany
Prior art keywords
screw
protective layer
wear
protection layer
molybdenum
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.)
Withdrawn
Application number
DE19873740916
Other languages
German (de)
Inventor
Stefan Dr Ing Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Krauss Maffei AG filed Critical Krauss Maffei AG
Priority to DE19873740916 priority Critical patent/DE3740916A1/en
Priority to JP63304282A priority patent/JPH01188319A/en
Publication of DE3740916A1 publication Critical patent/DE3740916A1/en
Withdrawn legal-status Critical Current

Links

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

An extruder or plasticating screw has on its screw flight a wear-protection layer, in particular of molybdenum, which is applied by flame or plasma spraying and is compacted and fused with the underlying material by laser treatment.

Description

Die Erfindung betrifft eine Schnecke für Kunststoff­ verarbeitungsmaschinen von der im Oberbegriff des An­ spruchs 1 genannten Art, sowie ein Verfahren zum Auf­ bringen der Verschleißschutzschicht einer solchen Schnecke.The invention relates to a screw for plastic processing machines of the type mentioned in the preamble of An pronounced 1 type, as well as a procedure for bring the wear protection layer of such a snail.

Schnecken in Kunststoffverarbeitungsmaschinen, insbesondere Extruder- und Plastifizierschnecken, unterliegen im Be­ trieb einem starken Verschleiß durch die Kunststoff­ schmelzen und insbesondere durch direkte Reibung an der Zylinderwand. Dies gilt in besonderem Maße für Schnecken von Doppelschneckenextrudern, da diese durch den Schmelzen­ druck einer Biegebelastung ausgesetzt sind.Screws in plastic processing machines, in particular Extruder and plasticizing screws are subject to Be drove heavy wear through the plastic melt and especially by direct friction on the Cylinder wall. This applies particularly to snails of twin screw extruders, as these melt through are subjected to a bending load.

Es ist seit etwa 20 Jahren bekannt, die Stege von Extruderschnecken mittels Flammspritzverfahren, später auch mittels Plasmaspritzverfahren, mit Verschleiß­ schutzschichten zu versehen. Bei diesem Verfahren können unterschiedliche Metalle und Metalloxyde sowie Metallegierungen als Spritzwerkstoffe Verwendung finden. Der Untergrund auf dem die Spritzschicht aufgetragen wird, erfordert eine vorherige Aufrauhung, die in den meisten Fällen durch Sandstrahlen erreicht wird.It has been known for about 20 years, the webs of Extruder screws using a flame spraying process, later also by means of plasma spraying, with wear to provide protective layers. With this procedure can different metals and metal oxides as well Find metal alloys as spray materials. The surface on which the spray layer is applied  requires prior roughening, which in most Felling is achieved by sandblasting.

Die Spritzschicht geht jedoch mit dem Untergrund keine innige chemische Verbindung ein. Es kommt zu keiner metallurgischen Aufschmelzung des Untergrundes und somit zu keiner Verbindung der Spritzschicht mit dem Unter­ grund durch An- oder Verschmelzen. Die Haftung der Spritz­ schicht auf dem Untergrund resultiert aus dem mechanischen Verhaken der gespritzten Metallpartikel im aufgerauhten Untergrund.However, the spray layer does not work with the substrate intimate chemical connection. No one comes metallurgical melting of the substrate and thus no connection of the spray layer with the sub reason by melting or fusing. The liability of the spritz layer on the surface results from the mechanical The sprayed metal particles get caught in the roughened Underground.

Diese mechanische, rein physikalische Haftung der Spritz­ schicht auf dem Untergrund hat unter bestimmten Bean­ spruchungen ein Abplatzen der gespritzten Schicht zur Folge. Außerdem ist ein Unterwandern der gespritzten Schicht durch korrosive Medien möglich.This mechanical, purely physical liability of the sprayer layer on the surface has under certain bean spalling of the sprayed layer result. There is also infiltration of the sprayed Layer possible through corrosive media.

Um diese Nachteile der durch Flamm- oder Plasmaspritzen aufgebrachten Schichten zu vermeiden, wurde ein Ver­ fahren entwickelt, bei dem die Verschleißschutzschicht durch Auftragsschweißen, insbesondere durch ein Pulverschweißverfahren, aufgebracht wurde. Hierbei kann zwar die gewünschte metallurgische Verbindung zwischen Schutzschicht und Untergrund erzielt werden, es ergeben sich aber andere Nachteile. To overcome these disadvantages of flame or plasma spraying To avoid applied layers, a ver drive developed in which the wear protection layer by build-up welding, especially by a Powder welding process was applied. Here can the desired metallurgical connection between Protective layer and substrate are achieved, it result but other disadvantages.  

Der Schneckensteg muß mit einer von seitlichen Stegen begrenzten Nut versehen sein, damit das Schweißbad während des Schweißvorganges nicht wegläuft.The worm bar must have one of the side bars limited groove so that the weld pool during of the welding process does not run away.

Das Schweißen mit Pulver (oder Elektroden), in denen die unter Ver­ schleißgesichtspunkten gewünschten hohen Molybdänanteile enthalten sind, ist problematisch, da die Gefahr von Riß­ bildung besteht. Man kann dieser Gefahr nur durch Her­ absetzen des Molybdängehaltes in der Elektrode begegnen, wodurch jedoch die Schmier- bzw. Notlaufeigenschaften der Schutzschicht beeinträchtigt werden. Das Regenerieren von verschlissenen Schnecken durch Auftragsschweißen der durch Verschleiß abgetragenen Schneckenstege ist unwirtschaftlich. Die für das Schweißen erforderliche Vorbereitungsbearbeitung und Nacharbeit der Schnecken­ stege ist zu umfangreich.Welding with powder (or electrodes), in which the under Ver high molybdenum fractions is problematic because of the risk of cracking education exists. This danger can only be avoided by Her counteracting the molybdenum content in the electrode, however, which causes the lubricating or emergency running properties the protective layer. The regeneration of worn screws by cladding which is wear-and-tear screw bars uneconomical. The one required for welding Preparation processing and reworking of the screws bridges is too extensive.

Der Erfindung liegt die Aufgabe zugrunde, eine Schnecke der genannten Art sowie das Verfahren zum Auf­ bringen der Schutzschicht so zu verbessern, daß mit ein­ fachen Mitteln eine gute Verbindung der Schutzschicht mit dem Untergrund erzielt wird, ohne daß Einschränkungen bezüglich der Materialwahl der Schutzschicht und/oder der Gestaltung des Schneckensteges in Kauf genommen werden müssen. The invention has for its object a Snail of the type mentioned and the procedure for opening bring the protective layer to improve so that with a a good connection of the protective layer is achieved with the underground without restrictions regarding the choice of material for the protective layer and / or accepted the design of the snail land Need to become.  

Die Lösung der Aufgabe ist in den Ansprüchen 1 und 5 angegeben.The problem is solved in claims 1 and 5 specified.

Das Nachbehandeln von Spritzschichten durch Hochleistungs­ laser ist an sich bekannt (Metalloberfläche 41(1987)7, S. 329-332). Die Anwendung auf Extruder- oder Plastifizier­ schnecken bringt jedoch besondere, bisher nicht erkannte Vorteile und ermöglicht es insbesondere, die Schutzschicht über die volle Breite des Schneckensteges, einschließlich seiner Kanten, aufzubringen.The post-treatment of spray coatings by high performance laser is known per se (metal surface 41 (1987) 7, Pp. 329-332). Use on extruders or plastifiers snails, however, bring special, previously unrecognized Advantages and, in particular, allows the protective layer across the full width of the screw flight, including its edges to apply.

Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnung näher erläutert. Diese zeigt schematisch eine Schnecke während der Laser-Nachbehandlung.An embodiment of the invention is based on the Drawing explained in more detail. This shows schematically one Snail during laser post-treatment.

Der Schneckensteg 3 der Schnecke 1 ist auf seiner Kopf­ bahn mit einer Schutzschicht 5 aus vorzugsweise reinem Molybdän versehen, die durch ein thermisches Spritz­ verfahren, also insbesondere Flamm- oder Plasmaspritzen, aufgebracht ist. Durch den in geeigneter Weise fokussierten Laserstrahl 7 eines Hochleistungslasers 9 findet eine Nachbehandlung statt, durch den im Laserfokus ein Schmelzen sowohl der Schutzschicht 5 als auch des Untergrundes stattfindet. Dadurch wird eine die Schutzschicht mit dem Untergrund metallurgisch verbindende Schweiß- bzw. Le­ gierungsschicht 11 gebildet. Gleichzeitig wird die nach dem Spritzen noch poröse Schicht 5 verdichtet. Durch ein Rohr 13 kann ein Schutzgas zugeführt werden. The screw flight 3 of the screw 1 is provided on its head track with a protective layer 5 made of preferably pure molybdenum, which is moved by a thermal spray, in particular flame or plasma spraying. The laser beam 7 of a high-power laser 9, which is focused in a suitable manner, provides for an aftertreatment by means of which both the protective layer 5 and the substrate are melted in the laser focus. This forms a welding or alloy layer 11 that metallurgically connects the protective layer to the substrate. At the same time, layer 5 , which is still porous after spraying, is compressed. A protective gas can be supplied through a tube 13 .

Es ist bei diesem Verfahren nicht mehr nötig, am Schnecken­ steg eine von Randstegen begrenzte Nut auszubilden. Die Schutzschicht kann sich über die volle Breite des Schneckensteges erstrecken und die Verschleißschutz­ wirkung insbesondere auch an den Kanten des Steges sicher­ stellen. Die Bewegung und/oder Leistung des Laserstrahls 7 kann so gesteuert werden, daß die Schutzschicht 5 und ihre Verbindung mit dem Untergrund im Bereich der Steg­ kanten besonders verstärkt wird.With this method, it is no longer necessary to form a groove delimited by edge webs on the screw web. The protective layer can extend over the full width of the screw web and ensure the wear protection effect, particularly at the edges of the web. The movement and / or power of the laser beam 7 can be controlled so that the protective layer 5 and its connection with the substrate in the region of the web edges is particularly reinforced.

Das Verfahren kann auch so ausgebildet werden, daß das Aufspritzen der Schicht und ihr Einschmelzen mittels Laserstrahl in einem Arbeitsgang durchgeführt werden.The method can also be designed so that the Spray on the layer and melt it down using Laser beam can be carried out in one operation.

Die Dicke der Schutzschicht 5 ist in der Zeichnung über­ trieben groß dargestellt. Es ist ein besonderer Vorteil der Erfindung, daß wegen der innigen Verbindung der Schutzschicht mit dem Untergrund die Dicke der Schutz­ schicht kleiner gewählt werden kann als bisher möglich. Eine Dicke von maximal 0,5 mm, vorzugsweise 0,2 bis 0,4 mm dürfte für die meisten Zwecke ausreichen.The thickness of the protective layer 5 is shown exaggerated in the drawing. It is a particular advantage of the invention that because of the intimate connection of the protective layer with the substrate, the thickness of the protective layer can be chosen to be smaller than was previously possible. A maximum thickness of 0.5 mm, preferably 0.2 to 0.4 mm should be sufficient for most purposes.

Das erfindungsgemäße Verfahren eignet sich auch besonders gut dafür, bereits durch Verschleiß unbrauchbar ge­ wordene Schnecken durch Erneuern der Schutzschicht zu regenerieren.The method according to the invention is also particularly suitable good for already useless due to wear snails by renewing the protective layer regenerate.

Claims (5)

1. Schnecke für Kunststoffverarbeitungsmaschinen, ins­ besondere Extruder- oder Plastifizierschnecke, mit einer auf die Kopfbahn der Schneckenstege durch thermisches Spritzen aufgebrachten Schutzschicht aus einer ver­ schleißfesten Legierung, dadurch gekennzeichnet, daß die Schutzschicht durch Laserstrahlbehandlung in dem Material des Schnecken­ steges eingeschmolzen ist.1. Screw for plastic processing machines, in particular extruder or plasticizing screw, with a protective layer applied to the top web of the screw webs by thermal spraying from a wear-resistant alloy, characterized in that the protective layer is melted by laser beam treatment in the material of the screw web. 2. Schnecke nach Anspruch 1, dadurch gekenn­ zeichnet, daß sich die Schutzschicht über die ge­ samte Breite der Kopfbahn des Schneckensteges einschließ­ lich deren Kanten erstreckt.2. Snail according to claim 1, characterized records that the protective layer over the ge including the entire width of the top track of the screw flight Lich extends their edges. 3. Schnecke nach Anspruch 2, dadurch gekenn­ zeichnet, daß die Schutzschicht an den Kanten des Steges verstärkt und/oder stärker mit dem Untergrund verschmolzen ist als in der Mitte der Kopfbahn.3. Snail according to claim 2, characterized records that the protective layer on the edges of the Struts reinforced and / or stronger with the subsurface is fused than in the middle of the header. 4. Schnecke nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Schutzschicht aus Molybdän oder einer überwiegend, insbesondere mehr als 90%, Molybdän enthaltenden Legierung besteht.4. Screw according to one of claims 1 to 3, characterized characterized that the protective layer  made of molybdenum or one predominantly, in particular more than 90% alloy containing molybdenum. 5. Verfahren zum Aufbringen einer Verschleißschutz­ schicht auf Schneckenstege von Extruder- oder Plastifi­ zierschnecken für Kunststoffverarbeitungsmaschinen, bei dem die Schutzschicht aus Metall mit guten Verschleiß­ eigenschaften, insbesondere aus Molybdän oder einer über­ wiegend Molybdän enthaltenden Legierung, durch thermisches Spritzen auf die Kopfbahn des Schneckensteges aufgebracht wird, dadurch gekennzeichnet, daß die Schutzschicht durch Behandlung mit einem Hochleistungs­ laser verdichtet und durch Einschmelzen mit dem Werk­ stoff des Schneckensteges metallurgisch verbunden wird.5. Procedure for applying wear protection layer on screw bars of extruder or plastifi ornamental screws for plastic processing machines, at which the protective layer of metal with good wear properties, in particular made of molybdenum or an over alloy containing molybdenum, by thermal Syringes applied to the top track of the screw flight is characterized in that the Protective layer through treatment with a high performance laser compacted and by melting with the factory material of the screw flight is metallurgically bonded.
DE19873740916 1987-12-03 1987-12-03 Screw with wear-protection layer for plastics processing machines, and method of applying the protection layer Withdrawn DE3740916A1 (en)

Priority Applications (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
JP63304282A JPH01188319A (en) 1987-12-03 1988-12-02 Screw for plastic working device and method of applying abrasion-resistant layer

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
DE3740916A1 true DE3740916A1 (en) 1989-06-15

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DE (1) DE3740916A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
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
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
EP0498286A1 (en) * 1991-02-02 1992-08-12 FRIEDRICH THEYSOHN GmbH Process for manufacturing a wear-resistant coating
EP0542631A1 (en) * 1991-11-14 1993-05-19 Xaloy, Inc. Method of preparing a feed screw for processing plastics
WO1997013004A1 (en) * 1995-10-04 1997-04-10 Engel Maschinenbau Gesellschaft Mbh Process for manufacturing wear- and corrosion-protected surfaces on plastifier screws for injection moulding machines
EP1215033A1 (en) * 2000-12-12 2002-06-19 Paul N. Colby Method for laser cladding of plasticating barrels
US6486432B1 (en) 1999-11-23 2002-11-26 Spirex Method and laser cladding of plasticating barrels
WO2013126667A1 (en) * 2012-02-24 2013-08-29 The Procter & Gamble Company High thermal conductivity co-injection molding system
CN104550955A (en) * 2014-12-26 2015-04-29 浙江工业大学 Technological method for screw manufacturing through laser combination
US9168613B2 (en) 2010-10-22 2015-10-27 Paul T. Colby Vertical laser cladding system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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

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Title
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DE-Z: Kunststoffe, 71, 1985, H.5, S.266-271 *
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Cited By (12)

* Cited by examiner, † Cited by third party
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
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
EP0498286A1 (en) * 1991-02-02 1992-08-12 FRIEDRICH THEYSOHN GmbH Process for manufacturing a wear-resistant coating
US5405660A (en) * 1991-02-02 1995-04-11 Friedrich Theysohn Gmbh Method of generating a wear-reducing layer on a plastifying worm or screw
EP0542631A1 (en) * 1991-11-14 1993-05-19 Xaloy, Inc. Method of preparing a feed screw for processing plastics
WO1997013004A1 (en) * 1995-10-04 1997-04-10 Engel Maschinenbau Gesellschaft Mbh Process for manufacturing wear- and corrosion-protected surfaces on plastifier screws for injection moulding machines
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