DE4034448A1 - Waste-free thermoplastic container mfr. - plastic strip is extruded, calendered, cut in to pre-prod. discs of precise size for waste-free moulding and transported to prod. moulding line - Google Patents

Waste-free thermoplastic container mfr. - plastic strip is extruded, calendered, cut in to pre-prod. discs of precise size for waste-free moulding and transported to prod. moulding line

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Publication number
DE4034448A1
DE4034448A1 DE19904034448 DE4034448A DE4034448A1 DE 4034448 A1 DE4034448 A1 DE 4034448A1 DE 19904034448 DE19904034448 DE 19904034448 DE 4034448 A DE4034448 A DE 4034448A DE 4034448 A1 DE4034448 A1 DE 4034448A1
Authority
DE
Germany
Prior art keywords
waste
prod
moulding
free
transported
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Withdrawn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
DE19904034448
Other languages
German (de)
Inventor
Jorge Lakatos
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 DE19904034448 priority Critical patent/DE4034448A1/en
Publication of DE4034448A1 publication Critical patent/DE4034448A1/en
Withdrawn legal-status Critical Current

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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
    • B29B17/0005—Direct recuperation and re-use of scrap material during moulding operation, i.e. feed-back of used material
    • 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
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • 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
    • 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
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/02—Combined thermoforming and manufacture of the preform
    • 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

Abstract

In a process for mfr. of thermoplastic containers e.g. beakers, a strip, plate or film is produced initially on an extruder, cooled on a calander and flat disc shape pre-products with dimensions conforming to those of the final moulded product are punched out while excess material returns to the extruder. The pre-products are transported to another independent prodn. line and after heating, formed by pneumatic or mechanical pressing to give a waste free prod. USE/ADVANTAGE - The process is used to produce thermoplastic containers by forming strip or film, reduces waste to almost nil and substantially reduces transporting and energy costs. (0/1)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Behäl­ tern aus thermoplastischem Kunststoff, z. B. Becher, Dosen, Ta­ bletts oder dgl. durch pneumatische oder mechanische Verformung des erhitzten Ausgangswerkstoffes.The invention relates to a method for producing containers tern made of thermoplastic, e.g. B. cups, cans, Ta bletts or the like. By pneumatic or mechanical deformation of the heated starting material.

Es ist bekannt, derartige Behälter aus einer vorgefertigten meist bandförmigen Platte aus Kunststoff herzustellen. Zur Her­ stellung der Platte wird Kunststoff in Pulver- oder Granulatform einem Extruder zugeführt, dem ein Abkühlkalander nachgeordnet ist. Hinter diesem befindet sich eine Aufwickelvorrichtung für die auf diese Weise hergestellte Platte oder Folie.It is known to produce such containers from a prefabricated mostly to produce ribbon-shaped plate made of plastic. To Her position of the plate is plastic in powder or granulate form fed to an extruder, which is followed by a cooling calender is. Behind this is a winder for the plate or film produced in this way.

Die besagten Behälter werden dadurch hergestellt, daß diese Platte abgewickelt und erhitzt wird und in einer Verformungsvor­ richtung mittels Luftdruck oder Vakuum ggf. auch mittels einer mechanischen Gegemform in eine Form eingezogen wird. Diese Form wird mittels Luft oder Wasser gekühlt und der darin befindliche Behälter aus Kunststoff kühlt dabei ebenfalls ab. Die über die Form hinausstehenden Teile der Platte werden abgeschnitten und bilden Abfall. Dieser wird einer Mühle zugeführt, von wo aus er wieder zum Extruder gelangt.Said containers are manufactured in that these Plate is unwound and heated and in a pre-deformation direction by means of air pressure or vacuum, if necessary also by means of a mechanical countermold is drawn into a mold. This form is cooled by air or water and the one in it Plastic containers also cool down. The over the Forming parts of the plate are cut off and form waste. This is fed to a mill, from where it reached the extruder again.

Nach einem anderen Verfahren wird ein Kunststoffgranulat in eine Vorform eingespritzt und anschließend thermoplastisch verformt. Dieses Verfahren ist jedoch unwirtschaftlich, da es einerseits sehr teuer ist und andererseits nur einen geringen Durchsatz er­ möglicht. According to another method, a plastic granulate is put into a Injected preform and then thermoplastic molded. However, this process is uneconomical because it is one hand is very expensive and on the other hand only a low throughput possible.  

Bei dem erstgenannten Verfahren ergibt sich das Problem, daß der Abfall etwa 40% des Plattenmaterials ausmacht. Ferner muß die Platte auf ihrer gesamten Fläche erhitzt werden, was eine be­ trächtliche Energieverschwendung bedeutet. Schließlich wird eine Verformungsvorrichtung benötigt, die eine relativ teure Ab­ schneide- und Rückführeinrichtung für den Abfall aufweisen muß.In the former method, there is the problem that the Waste accounts for about 40% of the plate material. Furthermore, the Plate to be heated over its entire surface, which is a be meaningful waste of energy means. Eventually one will Deformation device needed, which is a relatively expensive Ab must have cutting and return device for the waste.

Bei Produkten aus Polypropylen ist überdies der Abschneidevor­ gang kritisch.The cut off is also required for products made of polypropylene critical.

Ein weiterer Nachteil des bekannten Verfahrens besteht darin, daß die hergestellten Produkte ein relativ großes Volumen ein­ nehmen, weshalb die Transportkosten einen beträchtlichen Teil des Preises ausmachen.Another disadvantage of the known method is that the manufactured products have a relatively large volume take, which is why the transportation cost a significant part of the price.

Die Erfindung geht von dem Gedanken aus, daß es wirtschaftlicher ist, die Verformungsvorrichtungen von der Stelle, die die Platte herstellt, getrennt aufzustellen und so auszubilden, daß sie praktisch abfallfrei arbeiten.The invention is based on the idea that it is more economical is the deformation devices from the point that the plate manufactures, set up separately and trained so that they work practically waste-free.

Das erfindungsgemäße Verfahren besteht in den kennzeichnenden Merkmalen des Patentanspruches. Dieses Verfahren hat verschie­ dene Vorteile. Würde man nach dem Stand der Technik das bandför­ mige Vorprodukt entfernt vom Herstellungsort einer Verformungs­ vorrichtung zuführen, so müßte der dort anfallende Abfall zum Herstellungsort zurücktransportiert werden.The inventive method consists in the characteristic Features of the claim. This procedure has differed advantages. Would the bandför according to the state of the art Some intermediate product removed from the place of manufacture of a deformation feed device, the waste generated there would have to be Manufacturing location can be transported back.

Beim neuen Verfahren brauchen nur die Scheiben erhitzt und ver­ formt zu werden, so daß das Endprodukt abfallfrei anfällt.With the new process, only the disks need to be heated and ver to be molded so that the end product is waste-free.

Würde man z. B. Wegwerf-Kaffeebecher vom Herstellungsort zur Abnahmestelle transportieren, so ergäben sich hohe Frachtkosten. 1 m3 dieser Kaffeebecher wiegt etwa nur 165 kg. Ein LKW mit 22 m3 Laderaum könnte nur 3630 kg Becher transportieren.Would you z. B. Transporting disposable coffee cups from the place of manufacture to the point of acceptance would result in high freight costs. 1 m 3 of this coffee mug weighs only 165 kg. A truck with 22 m 3 loading space could only transport 3630 kg cups.

Beim neuen Verfahren werden die Scheiben zur an der Abnahme­ stelle aufgestellten Verformungsvorrichtung transportiert. 1 m3 Scheiben wiegt 785 kg. Somit könnte ein LKW mit 22 m3 Laderaum 17270 kg Scheiben transportieren, so daß sich an der Abnahme­ stelle 4,75mal soviele Becher herstellen lassen wie nach dem bekannten Verfahren.With the new process, the panes are transported to the deformation device set up at the acceptance point. 1 m 3 slices weighs 785 kg. Thus, a truck with 22 m 3 loading space could transport 17270 kg of panes, so that 4.75 times as many cups can be produced at the acceptance point as by the known method.

Das erfindungsgemäße Verfahren ist beispielsweise anhand der Zeichnung näher erläutert. Diese zeigt einen Fließplan. Der obere Teil dieses Fließplanes zeigt einen Extruder 1, der mit pulver- oder granulatförmigem Kunststoff beschickt wird. Der ex­ trudierte Kunststoff wird dann in nachgeordneten Abkühlkalandern 2 zu einem platten- oder bandförmigen Vorprodukt 3 gestaltet. Mittels einer nicht dargestellten Stanze werden aus dem Vorpro­ dukt 3 geeignete scheibenförmige Zuschnitte 5 gefertigt. Die da­ bei anfallenden Abfälle 6 werden einer Mühle 7 zugeführt, die den Extruder auf pneumatischem Wege mit dem Mahlgut S versorgt.The method according to the invention is explained in more detail for example with reference to the drawing. This shows a flow chart. The upper part of this flow chart shows an extruder 1 which is fed with powdered or granular plastic. The extruded plastic is then formed in downstream cooling calenders 2 to a plate or strip-shaped intermediate 3 . By means of a punch, not shown, 3 suitable disk-shaped blanks 5 are produced from the preliminary product. The resulting waste 6 is fed to a mill 7 , which supplies the extruder with the regrind S by pneumatic means.

Die scheibenförmigen Zuschnitte 5 werden z. B. mittels LKW 9 zur vorgesehenen Abnahmestelle transportiert. Dort werden die Zu­ schnitte durch eine Erhitzungsvorrichtung 10 geleitet und einer Verformungsvorrichtung 11 zugeführt, die wasser- oder luftge­ kühlt ist. Mittels eines Formstempels 12 werden dort die ge­ wünschten Endprodukte 13, z. B. Becher, Dosen, Tabletts oder dgl. ohne weiteren Abfall hergestellt. Sie können dann mittels LKW 14 der Endverbraucherstelle zugeführt werden.The disc-shaped blanks 5 are z. B. transported by truck 9 to the intended delivery point. There, the cuts are passed through a heating device 10 and fed to a deformation device 11 which is water- or air-cooled. By means of a die 12 there the desired end products 13 , z. B. cups, cans, trays or the like. Made without further waste. They can then be supplied to the end user by truck 14 .

Claims (1)

Verfahren zur Herstellung von Behältern aus thermoplastischem Kunststoff, z. B. Becher, Dosen, Tabletts oder dgl. durch pneuma­ tische oder mechanische Verformung des erhitzten Ausgangswerk­ stoffes, dadurch gekennzeichnet,
daß mittels eines Extruders (1) und nachgeordnetem Abkühlkalan­ der (2) in an sich bekannter Weise ein band-, platten- oder folienartiges Vorprodukt (3) aus Kunststoff hergestellt wird,
daß aus diesem Vorprodukt (3) in ihren Abmessungen dem Endpro­ dukt angepaßte scheibenförmige Zuschnitte (5) ausgestanzt und der Abfall (8) wieder dem Extruder (1) zugeführt werden und
daß die scheibenförmigen Zuschnitte (5) an einer ggf. von dieser Herstellungslinie entfernten bzw. von dieser Herstellungslinie unabhängigen Stelle erhitzt und von einer Verformungsvorrichtung (11, 12) abfallfrei zum Endprodukt (13) weiterverarbeitet wer­ den.Process for the production of containers made of thermoplastic, e.g. B. cups, cans, trays or the like. By pneumatic or mechanical deformation of the heated starting material, characterized in that
that an extruder ( 1 ) and downstream cooling calender ( 2 ) are used to produce a strip-like, plate-like or sheet-like preliminary product ( 3 ) made of plastic in a manner known per se,
that from this preliminary product ( 3 ) in its dimensions, the end product adapted disc-shaped blanks ( 5 ) are punched out and the waste ( 8 ) is fed back to the extruder ( 1 ) and
that the disc-shaped blanks ( 5 ) are heated at a point possibly removed from this production line or independent of this production line and processed by a shaping device ( 11 , 12 ) without waste to the end product ( 13 ) who the.
DE19904034448 1990-10-30 1990-10-30 Waste-free thermoplastic container mfr. - plastic strip is extruded, calendered, cut in to pre-prod. discs of precise size for waste-free moulding and transported to prod. moulding line Withdrawn DE4034448A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904034448 DE4034448A1 (en) 1990-10-30 1990-10-30 Waste-free thermoplastic container mfr. - plastic strip is extruded, calendered, cut in to pre-prod. discs of precise size for waste-free moulding and transported to prod. moulding line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904034448 DE4034448A1 (en) 1990-10-30 1990-10-30 Waste-free thermoplastic container mfr. - plastic strip is extruded, calendered, cut in to pre-prod. discs of precise size for waste-free moulding and transported to prod. moulding line

Publications (1)

Publication Number Publication Date
DE4034448A1 true DE4034448A1 (en) 1992-05-07

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DE19904034448 Withdrawn DE4034448A1 (en) 1990-10-30 1990-10-30 Waste-free thermoplastic container mfr. - plastic strip is extruded, calendered, cut in to pre-prod. discs of precise size for waste-free moulding and transported to prod. moulding line

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1011237C2 (en) * 1999-02-08 2000-08-10 Rexam Plastic Packaging B V Pallets for transporting plastic packaging, e.g. margarine tubs, made by recycling leftover material used to make the packaging

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1454952A1 (en) * 1963-10-26 1969-05-22 Joachim Brandenburger Spezialm Process for the production of cups by deep drawing from plastic foils
CH651246A5 (en) * 1980-06-20 1985-09-13 Bellaplast Maschinenbau Gmbh METHOD AND DEVICE FOR PRODUCING THIN-WALLED MOLDINGS FROM THERMOPLASTIC PLASTIC.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1454952A1 (en) * 1963-10-26 1969-05-22 Joachim Brandenburger Spezialm Process for the production of cups by deep drawing from plastic foils
CH651246A5 (en) * 1980-06-20 1985-09-13 Bellaplast Maschinenbau Gmbh METHOD AND DEVICE FOR PRODUCING THIN-WALLED MOLDINGS FROM THERMOPLASTIC PLASTIC.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1011237C2 (en) * 1999-02-08 2000-08-10 Rexam Plastic Packaging B V Pallets for transporting plastic packaging, e.g. margarine tubs, made by recycling leftover material used to make the packaging

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