DE4335994A1 - Process for producing semifinished products from recovered powder - Google Patents
Process for producing semifinished products from recovered powderInfo
- 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
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
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)
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.
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 |
Applications Claiming Priority (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 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4335994A1 true DE4335994A1 (en) | 1995-04-27 |
Family
ID=6500720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19934335994 Ceased DE4335994A1 (en) | 1993-10-21 | 1993-10-21 | Process for producing semifinished products from recovered powder |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4335994A1 (en) |
Citations (12)
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 |
-
1993
- 1993-10-21 DE DE19934335994 patent/DE4335994A1/en not_active Ceased
Patent Citations (12)
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)
Title |
---|
JP 56-91883 A. In: Patents Abstracts of Japan, C-75, Oct. 15, 1981, Vol. 5/No. 160 * |
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Legal Events
Date | Code | Title | Description |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |