DE19506565A1 - Hollow body mfr. from plastic flakes for improved acoustics pipes - Google Patents
Hollow body mfr. from plastic flakes for improved acoustics pipesInfo
- Publication number
- DE19506565A1 DE19506565A1 DE1995106565 DE19506565A DE19506565A1 DE 19506565 A1 DE19506565 A1 DE 19506565A1 DE 1995106565 DE1995106565 DE 1995106565 DE 19506565 A DE19506565 A DE 19506565A DE 19506565 A1 DE19506565 A1 DE 19506565A1
- Authority
- DE
- Germany
- Prior art keywords
- flakes
- plastic flakes
- plastic
- hollow body
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/02—Moulding by agglomerating
-
- 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
- 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
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
- B29K2075/02—Polyureas
-
- 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)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen von Hohlkörpern durch Konglutinieren von Kunststoff-Flocken, insbesondere flockenartiger Kunststoffabfälle. Ein mögli ches Verfahren zum Herstellen konglutinierter Schaum stoffe unter Verwendung von insbesondere Polyurethan-Schaum abfall beschreibt die DE-OS 23 01 949. Derartige Verfahren gewinnen zunehmend an Bedeutung, da im Rahmen des Recyclings vermehrt Kunststoffabfälle zu neuen Pro dukten verarbeitet werden müssen. Bei den üblichen be kannten Verfahren zum Herstellen von Formkörpern aus Kunststoff-Flocken werden diese Kunststoff-Flocken zunächst mit einem Haftmittel benetzt und anschließend zum endgültigen Formkörper verpreßt. Die Formteilbildung bzw. der Vernetzungsprozeß erfolgt dabei bevorzugt unter Heißdampf.The invention relates to a method for producing Hollow bodies by conglutinating plastic flakes, especially flake-like plastic waste. A possible Process for making conglutinated foam fabrics using in particular polyurethane foam Waste is described in DE-OS 23 01 949. Such Procedures are becoming increasingly important as part of of recycling increases plastic waste to new pro products must be processed. With the usual be knew methods for the production of moldings Plastic flakes become these plastic flakes first wetted with an adhesive and then pressed to the final molded body. The molding or the networking process is preferably carried out under Superheated steam.
Mit den bekannten Verfahren lassen sich jedoch keine Hohlkörper herstellen. Dabei wäre beispielsweise die Her stellung von rohrförmigen Kanalteilen aus Kunststoff-Flocken bzw. flockenartigen Kunststoffabfällen besonders interessant, da sich Kanalwände, die aus konglutinierten Kunststoff-Flocken aufgebaut wurden, durch besonders gün stige akustische Eigenschaften auszeichnen.However, none can be achieved with the known methods Create hollow body. For example, the Her Position of tubular duct parts made of plastic flakes or flake-like plastic waste in particular interesting because there are channel walls that are conglutinated Plastic flakes were built up by particularly gün Distinct acoustic properties.
Aufgabe der Erfindung ist es daher, ein Verfahren aufzu zeigen, mit Hilfe dessen durch Konglutinieren von Kunst stoff-Flocken auch Hohlkörper hergestellt werden.The object of the invention is therefore to establish a method show with the help of this by conglutinating art Fabric flakes can also be made hollow.
Zur Lösung dieser Aufgabe ist vorgesehen, daß zunächst auf die Innenwände einer die Außenkontur des Hohlkörpers bestimmenden Form Haftmittel aufgetragen wird, daß an schließend der Form-Hohlraum vollständig mit Kunststoff-Flocken befüllt wird und daß nach Vernetzen der äußeren, mit Haftmittel in Berührung kommenden Kunststoff-Flocken die nicht vernetzten innenliegenden Kunststoff-Flocken entfernt werden. Vorteilhafte Weiterbildungen sind Inhalt der Unteransprüche.To solve this problem it is provided that first on the inner walls of the outer contour of the hollow body determining form adhesive is applied to that closing the mold cavity completely with plastic flakes is filled and that after networking the outer, plastic flakes that come into contact with adhesive the non-cross-linked internal plastic flakes be removed. Advantageous further training is content of subclaims.
Im folgenden wird eine bevorzugte Ausführungsform der Er findung unter Bezug auf die beigefügten Prinzipskizzen näher erläutert. Dabei zeigt Fig. 1 einen Schnitt durch eine geöffnete Form, Fig. 2 diese Form im geschlossenen Zustand, Fig. 3 einen Teilschnitt durch die vollständig mit Kunststoff-Flocken befüllte Form, sowie Fig. 4 einen Teil-Längsschnitt durch den fertigen Hohlkörper.In the following a preferred embodiment of the invention will be explained in more detail with reference to the attached schematic diagrams. Here, FIG 1. 4 shows a section through an open mold, Fig. 2, this mold in the closed condition, Fig. 3 is a partial section through the completely filled with plastic flake form, and Fig. Is a partial longitudinal section through the finished hollow body.
Hergestellt werden soll der in Fig. 4 gezeigte kanal
artige Hohlkörper 1 durch Konglutinieren von Kunststoff-Flocken
2. Bezüglich seiner Außenkontur geformt wird der
Hohlkörper 1 dabei in einer hier zweiteiligen Form 3, die
aus einer Unterform 3a sowie einer Oberform 3b besteht.
Dabei bestimmen die den Form-Hohlraum 4 begrenzenden In
nenwände 5 der Form 3 wie üblich die Außenkontur des
Hohlkörpers 1. Wie die Fig. 1, 2 zeigen, mündet im Form-Hohl
raum 4 zumindest ein Kanal 6, jedoch sind bevorzugt
an den beiden einander gegenüberliegenden Seiten der Form
3 insgesamt zwei Kanäle 6 vorgesehen, deren Funktion sich
aus der folgenden Beschreibung des Herstellprozesses er
gibt:
Zunächst wird auf die Innenwände 5 der Form 3 ein Haft
mittel aufgetragen, welches geeignet ist, einen Ver
netzungsprozeß zwischen nebeneinanderliegenden Kunst
stoff-Flocken 2, vorzugsweise PUR-Flocken, hervorzuru
fen. Dieses Auftragen des Haftmittels erfolgt bei geöff
neter Form gemäß Fig. 1. Anschließend wird die Form 3 ge
schlossen, wie Fig. 2 zeigt.The channel-like hollow body 1 shown in FIG. 4 is to be produced by conglutinating plastic flakes 2 . The hollow body 1 thereby is formed with respect to its outer contour in a two-part here mold 3, which consists of a lower mold 3 a and an upper mold 3 b. The mold cavity 4 delimiting inner walls 5 of the mold 3 determine the outer contour of the hollow body 1 as usual. As shown in FIGS. 1, 2, at least one channel 6 opens into the mold cavity 4 , but a total of two channels 6 are preferably provided on the two opposite sides of the mold 3 , the function of which results from the following description of the manufacturing process :
First, an adhesive medium is applied to the inner walls 5 of the mold 3 , which is suitable for a Ver cross-linking process between adjacent plastic flakes 2 , preferably PUR flakes, Hervu fen. This application of the adhesive takes place with the mold opened according to FIG. 1. Then the mold 3 is closed, as shown in FIG. 2.
Nun werden über den Kanal 6 Kunststoff-Flocken 2 in den Hohlraum 4 eingefüllt, bevorzugt eingeblasen. Dabei sind diese Flocken 2, die aus PUR-Abfällen bzw. PUR-Recycling produkten hergestellt worden sind, selbst nicht mit Haft mittel benetzt. Jedoch benetzt das sich an den Innenwän den 5 befindende Haftmittel die im Hohlraum 4 außenlie genden, äußeren Kunststoff-Flocken 2, so daß diese äuße ren Kunststoff-Flocken 2 - ggf. unter Wärmezufuhr durch die Unterform 3a sowie die Oberform 3b - vernetzen. In diesem Stadium ist noch der gesamte Form-Hohlraum 4 mit Kunststoff-Flocken 2 befüllt, wie dies Fig. 3 zeigt, da in die geschlossene Form 3 so viele Kunststoff-Flocken 2 als möglich eingebracht worden sind, um sicherzustellen, daß der Hohlraum 4 vollständig mit Flocken 2 ausgefüllt ist.Now plastic flakes 2 are filled into the cavity 4 via the channel 6 , preferably blown in. These flakes 2 , which have been made from PUR waste or PUR recycling products, are not themselves wetted with adhesive. However wets the at the Innenwän the 5 exploiting Dende adhesive the außenlie in the cavity 4 constricting outer plastic flakes 2, so that these äuße ren plastic flakes 2 - optionally under heat supply by the bottom mold 3 a and the top mold 3 b - Networking . At this stage, the entire mold cavity 4 is still filled with plastic flakes 2 , as shown in FIG. 3, since as many plastic flakes 2 as possible have been introduced into the closed mold 3 to ensure that the cavity 4 is completely filled with flakes 2 .
Nach dem Vernetzungsprozeß der äußeren, mit Haftmittel in Berührung kommenden Kunststoff-Flocken 2 werden die im Hohlraum 4 innen liegenden, nicht vernetzten Kunststoff-Flocken 2 entfernt. Dies kann wiederum über den Kanal 6 und bevorzugt abermals durch Ausblasen erfolgen. Hier durch erhält man den in Fig. 4 gezeigten Hohlkörper 1, der nach Öffnen der Form 3 einfach entnommen werden kann. After the crosslinking process of the outer plastic flakes 2 coming into contact with adhesive, the non-crosslinked plastic flakes 2 located in the cavity 4 are removed. This can again be done via the channel 6 and preferably again by blowing. This gives the hollow body 1 shown in FIG. 4, which can be easily removed after opening the mold 3 .
Das beschriebene Herstellverfahren zeichnet sich durch äußerste Einfachheit aus und ist somit billig und leicht durchführbar. Ebenso günstig sind die damit erzielbaren Hohlkörper, nicht nur unter Recyclingaspekten, sondern auch hinsichtlich ihrer akustischen Eigenschaften, wenn diese Hohlkörper beispielsweise als Kanäle zur Leitung insbesondere gasförmiger Fluide verwendet werden.The manufacturing process described is characterized by extreme simplicity and is therefore cheap and light feasible. The achievable with it are just as cheap Hollow bodies, not only from a recycling perspective, but also in terms of their acoustic properties, if these hollow bodies, for example, as channels for conduction in particular gaseous fluids can be used.
Claims (3)
daß zunächst auf die Innen wände (5) einer die Außenkontur des Hohlkörpers (1) bestimmenden Form (3) Haftmittel aufgetragen wird, daß anschließend der Form-Hohlraum (4) vollständig mit Kunststoff-Flocken (2) befüllt wird,
und daß nach Vernetzen der äußeren, mit Haftmittel in Berührung kommenden Kunststoff-Flocken (2) die nicht vernetzten innenliegenden Kunststoff-Flocken (2) entfernt werden.1. A method for producing hollow bodies ( 1 ) by conglutinating plastic flakes ( 2 ), in particular flake-like plastic waste, characterized in that
that firstly an adhesive is applied to the inner walls ( 5 ) of a mold ( 3 ) determining the outer contour of the hollow body ( 1 ), that the mold cavity ( 4 ) is then completely filled with plastic flakes ( 2 ),
and that after crosslinking the outer plastic flakes ( 2 ) coming into contact with adhesive, the non-crosslinked inner plastic flakes ( 2 ) are removed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995106565 DE19506565B4 (en) | 1995-02-24 | 1995-02-24 | Method for producing hollow bodies by conglutination of plastic flakes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995106565 DE19506565B4 (en) | 1995-02-24 | 1995-02-24 | Method for producing hollow bodies by conglutination of plastic flakes |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19506565A1 true DE19506565A1 (en) | 1996-08-29 |
DE19506565B4 DE19506565B4 (en) | 2007-06-14 |
Family
ID=7754995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1995106565 Expired - Fee Related DE19506565B4 (en) | 1995-02-24 | 1995-02-24 | Method for producing hollow bodies by conglutination of plastic flakes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19506565B4 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2262600A1 (en) * | 1972-12-21 | 1974-06-27 | Ver Foerderung Inst Kunststoff | Plastic skins for foam core moulded panels - produced in mould elements as linings |
DE2061112C3 (en) * | 1969-12-11 | 1977-12-08 | Sekisui Kagaku Kogyo KX, Osaka (Japan) | Process for making molded articles from thermoplastic material |
DE4004587A1 (en) * | 1990-02-15 | 1991-08-22 | Joma Daemmstoffwerk Gmbh & Co | Recovery of polystyrene from scrap foam - granulated foam is compressed in several steps in chamber while steam is added |
EP0366407B1 (en) * | 1988-10-24 | 1994-07-27 | Toray Engineering Co., Ltd. | Method of making a composite foamed and shaped article |
EP0347528B1 (en) * | 1988-05-24 | 1994-12-28 | Deutsche Solvay-Werke Gmbh | Process for preparing moulded objects |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE778106A (en) * | 1972-01-17 | 1972-07-17 | Serpo P V B A | METHOD AND EQUIPMENT FOR THE MANUFACTURE OF CONGLUTINATED FOAM PRODUCTS. |
DE4333330A1 (en) * | 1993-09-30 | 1995-04-06 | Basf Ag | Process for the production of foam molded parts |
-
1995
- 1995-02-24 DE DE1995106565 patent/DE19506565B4/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2061112C3 (en) * | 1969-12-11 | 1977-12-08 | Sekisui Kagaku Kogyo KX, Osaka (Japan) | Process for making molded articles from thermoplastic material |
DE2262600A1 (en) * | 1972-12-21 | 1974-06-27 | Ver Foerderung Inst Kunststoff | Plastic skins for foam core moulded panels - produced in mould elements as linings |
EP0347528B1 (en) * | 1988-05-24 | 1994-12-28 | Deutsche Solvay-Werke Gmbh | Process for preparing moulded objects |
EP0366407B1 (en) * | 1988-10-24 | 1994-07-27 | Toray Engineering Co., Ltd. | Method of making a composite foamed and shaped article |
DE4004587A1 (en) * | 1990-02-15 | 1991-08-22 | Joma Daemmstoffwerk Gmbh & Co | Recovery of polystyrene from scrap foam - granulated foam is compressed in several steps in chamber while steam is added |
Also Published As
Publication number | Publication date |
---|---|
DE19506565B4 (en) | 2007-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
8125 | Change of the main classification |
Ipc: B29C 41/08 |
|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |