DE4335994A1 - Process for producing semifinished products from recovered powder - Google Patents

Process for producing semifinished products from recovered powder

Info

Publication number
DE4335994A1
DE4335994A1 DE19934335994 DE4335994A DE4335994A1 DE 4335994 A1 DE4335994 A1 DE 4335994A1 DE 19934335994 DE19934335994 DE 19934335994 DE 4335994 A DE4335994 A DE 4335994A DE 4335994 A1 DE4335994 A1 DE 4335994A1
Authority
DE
Germany
Prior art keywords
powder
separating layer
heat
recovered powder
semi
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.)
Ceased
Application number
DE19934335994
Other languages
German (de)
Inventor
Karlheinz Fischlowitz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19934335994 priority Critical patent/DE4335994A1/en
Publication of DE4335994A1 publication Critical patent/DE4335994A1/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/006—Pressing and sintering powders, granules or fibres
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/68—Release sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

In a process for producing semifinished products from recovered powder, a heat-resistant mould for receiving the recovered powder is provided with a release layer. After placing the release layer into the heat-resistant mould, recovered powder of different, similar or the same colour properties is introduced and heated to temperatures above 50 DEG C.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Halbfer­ tigteilen aus Altpulver gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for the production of halffer tigteile from waste powder according to the preamble of the claim 1.

Das zur elektrostatischen Applikation von Aluminium-, Stahl- und Eisenteilen verwendete Beschichtungspulver wird während des Beschichtungsprozesses im sogenannten Rückgewinnungsverfahren verarbeitet. Hierbei wird das Beschichtungspulver dem Produk­ tionskreislauf während des Beschichtungsvorganges der zu be­ schichtenden Teile mehrmals zugeführt. Durch verschiedene Rei­ bungspunkte innerhalb der pulverführenden Einheiten und der zum Beschichten benutzten Sprüheinheiten verringert sich die zur optimalen Beschichtung notwendige Korngröße des zyklisch wieder zugeführten Beschichtungspulvers und durch den Einfluß von Raum­ stäuben tritt eine zusätzliche Verschlechterung der Pulverquali­ tät ein. Das im Rückgewinnungsverfahren ausgeschiedene und nicht mehr verwendbare Pulver, auch Altpulver genannt, wird durch einzelne Filtersysteme aus dem Beschichtungskreislauf ausgeson­ dert und in bereitgestellte integrierte Pulverbehälter geblasen. Bisher erfolgte die Entsorgung dieses Altpulvers in Form von Hausmüll oder Sondermüll, je nach den kommunalen Abfallentsor­ gungsverordnungen.That for the electrostatic application of aluminum, steel and Coating powder used during iron parts Coating process in the so-called recovery process processed. The coating powder is the product tion cycle during the coating process to be layered parts fed several times. Through different rows Practice points within the powder-carrying units and at the The spray units used for coating are reduced optimal coating necessary grain size of the cyclically again supplied coating powder and by the influence of space dust occurs an additional deterioration of the powder quality  act. That and not eliminated in the recovery process more usable powder, also called waste powder, is by individual filter systems from the coating cycle and blown into the provided integrated powder container. So far, this waste powder has been disposed of in the form of Household or special waste, depending on the municipal waste disposal company regulations.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von Halbfertigteilen aus Altpulver zu schaffen, bei dem das Altpulver auf einfache Weise verarbeitet wird.The invention has for its object a method for Manufacture of semi-finished parts from used powder to create which the waste powder is processed in a simple manner.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the characterizing Part of claim 1 specified features solved.

Weitere Ausgestaltungen der Erfindung ergeben sich aus den Unter­ ansprüchen.Further refinements of the invention result from the sub claims.

Mit dem erfindungsgemäßen Verfahren wird eine einfache und um­ weltfreundliche Möglichkeit geschaffen, das bei der Beschichtung von Aluminium-, Stahl- und Eisenteilen anfallende, an sich nicht weiter verwendbare Beschichtungsaltpulver weiterzuverarbeiten bzw. zu verwenden. Gemäß der Erfindung werden aus Altpulver Halbfertigteile gewonnen, die durch eine nachfolgende Bearbeitung zu den verschiedartigsten Produkten weiterverarbeitet werden können wie beispielsweise Trittplatten, Treppenstufen, Fundamen­ ten, Beeteinfassungen, Palisaden usw. Die Bearbeitung der Halb­ fertigteile erfolgt vorteilhafterweise auf mechanische Weise, z. B. durch Bohren, Fräsen, Sägen, Feilen usw.With the inventive method is a simple and order created a world-friendly way of coating aluminum, steel and iron parts, but not in themselves to further process usable coating powder or to use. According to the invention, waste powder Semi-finished parts obtained by subsequent processing to be processed into various products can, for example, step plates, steps, foundations ten, bed borders, palisades, etc. The processing of the half finished parts are advantageously done mechanically, e.g. B. by drilling, milling, sawing, filing etc.

Wesentlich ist bei dem erfindungsgemäßen Verfahren die Verwendung einer Trennschicht in der Aufnahmeform, in welcher das Altpulver durch Erhitzung vernetzt wird, wodurch ein Anhaften des erhitzten Altpulvers in der Aufnahmeform verhindert wird.The use in the method according to the invention is essential a separating layer in the receiving form, in which the old powder is crosslinked by heating, thereby adhering the heated Used powder in the intake form is prevented.

Nachfolgend werden bevorzugte Ausführungsformen des erfindungs­ gemäßen Verfahrens näher erläutert. Preferred embodiments of the invention are described below according to the method explained in more detail.  

Nach dem erfindungsgemäßen Verfahren wird das bei der elektro­ statischen Applikation von Aluminium-, Stahl- und Eisenteilen eingesetzte und aufgrund einer Verringerung der Korngröße sowie durch Verunreinigung mittels Raumstäuben verschlechterte Pulver zur Herstellung von Halbfertigteilen verwendet, die einer nach­ folgenden Weiterverarbeitung zugeführt werden können. Das durch Filtersysteme aus dem Kreislauf einer Vorrichtung zur elektro­ statischen Applikation von Beschichtungspulver ausgesonderte Altpulver, das in hierfür vorgesehene Pulverbehälter geblasen wurde, wird in eine beliebige, mit einer Trennschicht ausgeklei­ deten Form eingegeben, bevor die Herstellung der Halbfertigteile erfolgt. Als Trennschicht wird vorteilhafterweise ein Backvlies oder ein Backpapier eingesetzt, das in die Form vor dem Einfüllen des Altpulvers eingelegt wird. Die Verwendung eines Vlieses gegenüber Papier hat den Vorteil, daß es als ganzes erhalten bleibt und somit mehrmals eingesetzt werden kann.According to the method according to the invention, the electro static application of aluminum, steel and iron parts used and due to a reduction in grain size as well Powders deteriorated due to contamination by room dusts used for the production of semi-finished parts, which one after following processing can be supplied. That through Filter systems from the circuit of a device for electro static application of coating powder discarded Used powder blown into the powder container provided for this purpose has been cut into any one with a separating layer deten form entered before the production of the semi-finished parts he follows. A baking nonwoven is advantageously used as the separating layer or a baking paper inserted into the mold before filling of the old powder is inserted. The use of a fleece over paper has the advantage of being preserved as a whole remains and can therefore be used several times.

Nach dem Einbringen des Altpulvers in die mit einem Backpapier oder Vlies versehene Form erfolgt die Vernetzung des Altpulvers durch Erhitzung mittels eines Heißluftofens. Die das Altpulver aufnehmende Form muß hitzebeständige Eigenschaften aufweisen. Durch die Erhitzung des Altpulvers wird dieses zu einem festen Block verschmolzen, wobei das Erweichen und Schmelzen oberhalb von ca. 50°C erreicht wird.After inserting the old powder into the with a baking paper or non-woven form, the old powder is crosslinked by heating with a convection oven. The the old powder receiving form must have heat-resistant properties. By heating the old powder, it becomes solid Block fused, with softening and melting above of approx. 50 ° C is reached.

Gemäß einem weiteren Verfahren wird zweckmäßigerweise das Altpul­ ver je nach Farbe getrennt und nur gleichfarbige oder annähernd farblich identische Altpulverrückstände in eine Form eingegeben, um sie zu Halbfertigteilen weiterzuverarbeiten.According to a further method, the waste pulp is expediently ver separated by color and only of the same color or approximate color-identical waste powder residues entered in a form, to process them into semi-finished parts.

Gemäß einer weiteren Ausführungsform des erfindungsgemäßen Ver­ fahrens wird nach dem Erweichen und Schmelzen des Altpulvers eine Temperaturerhöhung auf bis zu 180-200°C vorgenommen. Abhängig von dem gewünschten Volumen der Halbfertigteile wird die Höhe der Temperatur und die Dauer der Temperaturerhöhung festgelegt.According to a further embodiment of the Ver driving becomes one after the waste powder has softened and melted Temperature increase up to 180-200 ° C made. Depending on the desired volume of the semi-finished parts is the height of the Temperature and the duration of the temperature increase set.

Nach dem Erkalten des geschmolzenen Altpulvers und nach der Entnahme aus der Aufnahmeform werden die auf diese Weise gewonne­ nen Halbfertigteile vorzugsweise einer mechanischen Bearbeitung zugeführt, um die Halbfertigteile in die jeweils gewünschte Form durch Bohren, Fräsen, Sägen, Feilen usw. zu bringen.After the melted old powder has cooled and after the  Withdrawal from the admission form are obtained in this way NEN semi-finished parts, preferably mechanical processing fed to the semi-finished parts in the desired shape by drilling, milling, sawing, filing etc.

Gemäß der Erfindung ist insbesondere die Entnahme der Halbfertig­ teile aus den Formen dadurch gewährleistet, daß durch die Trenn­ schicht in Form eines Vlieses oder Papiers ein Anhaften des verschmolzenen Altpulvers an der Aufnahmeform verhindert wird.According to the invention, the removal of the semi-finished product is in particular parts from the molds ensured that by separating layer in the form of a fleece or paper fused waste powder on the intake form is prevented.

Claims (6)

1. Verfahren zur Herstellung von Halbfertigteilen aus Altpulver dadurch gekennzeichnet,
daß eine hitzebeständige Form zur Aufnahme des Altpulvers mit einer Trennschicht versehen wird,
daß nach Einlegen der Trennschicht in die hitzebeständige Form Altpulver unterschiedlicher, ähnlicher oder gleicher Farbeigenschaften eingebracht und auf Temperaturen von oberhalb 50°C erhitzt wird.1. A process for the production of semi-finished parts from waste powder, characterized in that
that a heat-resistant mold for receiving the old powder is provided with a separating layer,
that after inserting the separating layer into the heat-resistant mold, old powder of different, similar or identical color properties is introduced and heated to temperatures above 50 ° C. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Altpulver nach Erweichen und Schmelzen auf Temperaturen von bis zu ca. 180-200°C erhitzt wird. 2. The method according to claim 1, characterized in that the Used powder after softening and melting to temperatures of is heated up to approx. 180-200 ° C.   3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Trennschicht ein Backvlies verwendet wird.3. The method according to claim 1 or 2, characterized in that a baking mat is used as a separating layer. 4. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Trennschicht ein Backpapier eingesetzt wird.4. The method according to claim 1 or 2, characterized in that a baking paper is used as a separating layer. 5. Verfahren nach wenigstens einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Altpulver, abhängig von dem gewünschten Volumen der hitzebeständigen Form, auf einer Temperatur von bis zu 180-200°C gehalten wird.5. The method according to at least one of the preceding claims, characterized in that the waste powder, depending on the desired volume of the heat-resistant mold, on a Temperature of up to 180-200 ° C is maintained. 6. Verfahren nach wenigstens einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das zu einem Block verschmolzene Altpulver abgekühlt und einer mechanischen Bearbeitung zugeführt wird.6. The method according to at least one of the preceding claims, characterized in that the fused into a block Cooled waste powder and mechanical processing is fed.
DE19934335994 1993-10-21 1993-10-21 Process for producing semifinished products from recovered powder Ceased DE4335994A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19934335994 DE4335994A1 (en) 1993-10-21 1993-10-21 Process for producing semifinished products from recovered powder

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Application Number Priority Date Filing Date Title
DE19934335994 DE4335994A1 (en) 1993-10-21 1993-10-21 Process for producing semifinished products from recovered powder

Publications (1)

Publication Number Publication Date
DE4335994A1 true DE4335994A1 (en) 1995-04-27

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DE19934335994 Ceased DE4335994A1 (en) 1993-10-21 1993-10-21 Process for producing semifinished products from recovered powder

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DE (1) DE4335994A1 (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH315392A (en) * 1952-12-06 1956-08-15 Wilhelm Schuler Gmbh Process and device for the production of porous moldings from thermoplastics
DE1241599B (en) * 1961-02-01 1967-06-01 Ruhrchemie Ag Use of powdery high molecular weight polyethylene for the production of solid, porous bodies by sintering
DE1255298B (en) * 1960-01-29 1967-11-30 Ruhrchemie Ag Process for the production of sintered porous bodies
CH550656A (en) * 1972-08-11 1974-06-28 Schreiber Herbert Decorative plastic panels with rough surface - by spreading fusible plastic granules over flat base layer, and heating to fuse together granules
DE2303750A1 (en) * 1973-01-26 1974-08-01 Varta Batterie METHOD FOR MANUFACTURING HIGHLY ELASTIC SOLID SINTER SEPARATORS
DE2359112A1 (en) * 1973-11-27 1975-05-28 Ceske Vysoke Uceni Tech Thermoplastics test specimens prodn. by vacuum sintering - and regulated cooling, giving uniform structure
GB1578502A (en) * 1977-01-28 1980-11-05 Davy International Ag Process and apparatus for re-melting polymer waste
DE3924312A1 (en) * 1989-07-22 1991-01-24 Gfr Aufbereitung Reststoffe METHOD AND DEVICE FOR RECYCLING RESIDUES FROM LACQUERIES ETC.
DE4018190A1 (en) * 1990-06-07 1991-12-12 Hestermann Gerhard Moulded prods. esp. from waste thermoset material - obtd. by mixing epoxy¨ polyester plastic powder with fine- or coarse-grain or fibrous plastic fillers and heating
DE4040905A1 (en) * 1990-09-25 1992-03-26 Heinz Bechtold Supporting board, esp. for mfg. concrete prods. - made from thermoplastic scrap, by plastification and extrusion or moulding
DE4041864A1 (en) * 1990-12-27 1992-07-02 Helmut Pelzer Reutilisation of thermoplastic polyurethane foam components - by heat compressing filled components below decomposition temp.
DE4125909A1 (en) * 1991-08-05 1993-02-11 H P Chemie Pelzer Res & Dev TREATMENT AND USE OF LACQUER SLUDGE

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH315392A (en) * 1952-12-06 1956-08-15 Wilhelm Schuler Gmbh Process and device for the production of porous moldings from thermoplastics
DE1255298B (en) * 1960-01-29 1967-11-30 Ruhrchemie Ag Process for the production of sintered porous bodies
DE1241599B (en) * 1961-02-01 1967-06-01 Ruhrchemie Ag Use of powdery high molecular weight polyethylene for the production of solid, porous bodies by sintering
CH550656A (en) * 1972-08-11 1974-06-28 Schreiber Herbert Decorative plastic panels with rough surface - by spreading fusible plastic granules over flat base layer, and heating to fuse together granules
DE2303750A1 (en) * 1973-01-26 1974-08-01 Varta Batterie METHOD FOR MANUFACTURING HIGHLY ELASTIC SOLID SINTER SEPARATORS
DE2359112A1 (en) * 1973-11-27 1975-05-28 Ceske Vysoke Uceni Tech Thermoplastics test specimens prodn. by vacuum sintering - and regulated cooling, giving uniform structure
GB1578502A (en) * 1977-01-28 1980-11-05 Davy International Ag Process and apparatus for re-melting polymer waste
DE3924312A1 (en) * 1989-07-22 1991-01-24 Gfr Aufbereitung Reststoffe METHOD AND DEVICE FOR RECYCLING RESIDUES FROM LACQUERIES ETC.
DE4018190A1 (en) * 1990-06-07 1991-12-12 Hestermann Gerhard Moulded prods. esp. from waste thermoset material - obtd. by mixing epoxy¨ polyester plastic powder with fine- or coarse-grain or fibrous plastic fillers and heating
DE4040905A1 (en) * 1990-09-25 1992-03-26 Heinz Bechtold Supporting board, esp. for mfg. concrete prods. - made from thermoplastic scrap, by plastification and extrusion or moulding
DE4041864A1 (en) * 1990-12-27 1992-07-02 Helmut Pelzer Reutilisation of thermoplastic polyurethane foam components - by heat compressing filled components below decomposition temp.
DE4125909A1 (en) * 1991-08-05 1993-02-11 H P Chemie Pelzer Res & Dev TREATMENT AND USE OF LACQUER SLUDGE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 56-91883 A. In: Patents Abstracts of Japan, C-75, Oct. 15, 1981, Vol. 5/No. 160 *

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