DE4023878A1 - Equipment for thermo-forming plastic film - by smoothing back of film when heated by blown hot air system which is uniform and can also apply cooling air and save energy - Google Patents

Equipment for thermo-forming plastic film - by smoothing back of film when heated by blown hot air system which is uniform and can also apply cooling air and save energy

Info

Publication number
DE4023878A1
DE4023878A1 DE19904023878 DE4023878A DE4023878A1 DE 4023878 A1 DE4023878 A1 DE 4023878A1 DE 19904023878 DE19904023878 DE 19904023878 DE 4023878 A DE4023878 A DE 4023878A DE 4023878 A1 DE4023878 A1 DE 4023878A1
Authority
DE
Germany
Prior art keywords
film
heated
smoothing
heater
station
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Withdrawn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
DE19904023878
Other languages
German (de)
Inventor
Emil Hoelzl
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE19904023878 priority Critical patent/DE4023878A1/en
Publication of DE4023878A1 publication Critical patent/DE4023878A1/en
Withdrawn legal-status Critical Current

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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B29C33/046—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam using gas
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/46—Heating or cooling
    • 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould

Abstract

Equipment for thermoforming plastic films has a radiation-heated mould at one station, applies the film to the mould tool at another station, and removes the moulded film from the cooled tool at a third station; the back of the film, however, is smoothed with a cap fitted with a heater after the film has been fused on the heated mould tool; the heater is a hot air type with a heated air holder and bores for fresh and/or surrounding air. More specifically, the bores in the smoothing cap are near to its surface and they produce a more uniform heat distribution than radiation heaters. Moreover the system reduces weight. The moulding tool is normally rotated several times near to the smoothing cap and this has the disadvantage of risk of dirtying the film; moreover a radiation heater might be damaged. The heat store can be heated up while the smoothing device is stationary. The fan for the hot air can be driven by a battery. The air bores can be used for cooling as well as heating. This arrangement saves energy. ADVANTAGE - The heating system is efficient (and more so than in existing equipment of this kind).

Description

Die Erfindung betrifft eine Vorrichtung zum Herstellen von Kunststoff-Formfolien mit einem Formwerkzeug, das in einer Heizstation durch Strahlung erwärmt, in einer Be­ schickungsstation mit auf der Formoberfläche des Form­ werkzeugs aufschmelzbarem Kunststoff beschichtet und in einer Entformstation von der auf der Formoberfläche des abgekühlten Formwerkzeuges gebildeten Kunststoff-Formfo­ lie getrennt wird, wobei die Rückseite der Kunststoff- Formfolie nach deren Aufschmelzen auf der Formoberfläche durch Wärmebehandlung mittels einer eine Heizeinrichtung aufweisenden Nachglätthaube nachgeglättet wird. Eine der­ artige Vorrichtung ist aus der europäischen Patentanmel­ dung 03 34 074 oder 03 34 073 bekannt. Dort ist die Heiz­ einrichtung der Nachglätthaube als Strahlungsheizung aus­ gebildet.The invention relates to a device for manufacturing of plastic molded films with a molding tool that is in a heating station heated by radiation, in a loading loading station with on the mold surface of the mold tool meltable plastic coated and in a demolding station from that on the mold surface of the cooled mold formed plastic mold lie is separated, the back of the plastic Shaped film after it has melted on the mold surface by heat treatment by means of a heater having the post-smoothing hood is smoothed. One of the like device is from the European patent application dung 03 34 074 or 03 34 073 known. The heating is there set up the post-smoothing hood as radiant heating educated.

Im Bereich dieser Nachglättstation erfolgt eine mehrfache Rotation des Formwerkzeuges inklusive aufliegender Nach­ glätthaube, um das in der Beschickungsstation einge­ brachte Kunststoffmaterial optimal über der Formwerkzeug- Oberfläche zu verteilen. Die in der Nachglätthaube ange­ ordneten Strahler stellen somit eine nicht zu vernachläs­ sigende Unwuchtquelle dar. Darüber hinaus ist es erfor­ derlich, während dieser Rotationsbewegung den Strahlern kontinuierlilch Energie zuzuführen, was lediglich mit er­ schwertem technischen Aufwand möglich ist. Eine demgegen­ über verbesserte Heizeinrichtung aufzuzeigen, ist daher die Aufgabe der Erfindung.A multiple takes place in the area of this post-smoothing station Rotation of the mold including overlying smoothing hood to put it in the loading station brought plastic material optimally over the mold Distribute surface. The in the post-smoothing hood ordered spotlights therefore do not neglect one is a source of unbalance  the radiators during this rotational movement to continuously supply energy, which is only with it difficult technical effort is possible. One against it To show about improved heating is therefore the object of the invention.

Es wird vorgeschlagen, daß die Heizeinrichtung der Nach­ glätthaube als Warmluftheizung mit einem Wärmespeicher und Frischluft- und/oder Umluftkanälen ausgebildet ist. Die Luftkanäle verlaufen dabei vorzugsweise nahe der Oberfläche innerhalb der Nachglätthaube. Hierdurch er­ folgt zum einen eine gegenüber einer Strahlerheizung gleichmäßigere Wärmeverteilung über der gesamten Oberflä­ che der Kunststoff-Formfolie. Zum anderen kann eine Ge­ wichtsreduktion erzielt werden. Auch besteht keine Ge­ fahr, daß die Strahler während der Rotationsbewegung ver­ schmutzt oder zerstört werden könnten. Schließlich ist es aufgrund des Wärmespeichers, der - wie Anspruch 2 be­ schreibt - an eine Energiequelle an- bzw. abkoppelbar ist, nicht mehr erforderlich, während der Ro­ tationsbewegung Energie zuzuführen. Vielmehr kann die Aufheizung des Wärmespeichers in den Stillstandszeiten der Nachglätthaube erfolgen. Zur Energieversorgung des für die Funktion der Warmluftheizung erforderlichen Ge­ bläses kann dabei in der Nachglätthaube eine Batterie vorgesehen sein.It is proposed that the heater of the night smooth hood as warm air heating with a heat accumulator and fresh air and / or recirculated air channels is formed. The air channels preferably run close to the Surface inside the smoothing hood. This way he on the one hand follows a radiator heater more even heat distribution over the entire surface surface of the plastic molded film. On the other hand, a Ge weight reduction can be achieved. There is also no Ge drive that the spotlights ver during the rotational movement dirty or destroyed. After all it is due to the heat accumulator, which - as claim 2 be writes - can be connected or disconnected to an energy source is no longer required during the ro tion movement to supply energy. Rather, the Heating of the heat accumulator during downtimes the smoothing hood. To power the Ge required for the function of hot air heating A battery can blow in the post-smoothing hood be provided.

Vorteilhafterweise erhöht die Gestaltung der Heizung als Warmluftheizung mit einem Wärmespeicher sowie Heizkanälen den Heizungs-Wirkungsgrad. Vorteilhafterweise können die Luftkanäle ferner dazu genutzt werden, vor Erreichen der Entformstation das Formwerkzeug auf einfache Weise abzu­ kühlen. Somit wird durch diese Maßnahme das während des Fertigungsprozesses von Kunststoff-Formfolien benötigte Energiepotential in optimaler Weise ausgenutzt.Advantageously, the design of the heater increases Warm air heating with a heat storage and heating channels the heating efficiency. Advantageously, the Air ducts are also used before reaching the Demolding station the mold off in a simple manner cool. Thus, this measure means that during the Manufacturing process of plastic molded films required Energy potential exploited in an optimal way.

Claims (3)

1. Vorrichtung zum Herstellen von Kunststoff-Formfolien mit einem Formwerkzeug, das in einer Heizstation durch Strahlung erwärmt, in einer Beschickungssta­ tion mit auf der Formoberfläche des Formwerkzeugs aufschmelzbarem Kunststoff beschichtet und in einer Entformstation von der auf der Formoberfläche des abgekühlten Formwerkzeugs gebildeten Kunststoff- Formfolie getrennt wird, wobei die Rückseite der Kunststoff-Formfolie nach deren Aufschmelzen auf der Formoberfläche durch Wär­ mebehandlung mittels einer eine Heizeinrichtung auf­ weisenden Nachglätthaube nachgeglättet wird, dadurch gekennzeichnet, daß die Heizeinrichtung als Warmluftheizung mit einem Wärmespeicher und Frischluft- und/oder Umluftkanälen ausgebildet ist.1. Device for producing plastic films with a mold that is heated by radiation in a heating station, coated in a charging station with meltable plastic on the mold surface of the mold and coated in a demolding station from the plastic mold formed on the mold surface of the cooled mold is separated, the back of the plastic film after its melting on the mold surface by heat treatment by means of a heating device pointing afterglow hood is smoothed, characterized in that the heating device is designed as a hot air heater with a heat accumulator and fresh air and / or recirculated air channels. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Heizeinrichtung an eine Energiequelle an- bzw. abkoppelbar ist. 2. Device according to claim 1, characterized in that the heater on an energy source can be connected or disconnected.   3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Batterie zum Be­ trieb des für die Funktion der Warmluftheizung er­ forderlichen Gebläses vorgesehen ist.3. Device according to claim 1 or 2, characterized in that a battery for loading he drove for the function of the warm air heating required blower is provided.
DE19904023878 1990-07-27 1990-07-27 Equipment for thermo-forming plastic film - by smoothing back of film when heated by blown hot air system which is uniform and can also apply cooling air and save energy Withdrawn DE4023878A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904023878 DE4023878A1 (en) 1990-07-27 1990-07-27 Equipment for thermo-forming plastic film - by smoothing back of film when heated by blown hot air system which is uniform and can also apply cooling air and save energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904023878 DE4023878A1 (en) 1990-07-27 1990-07-27 Equipment for thermo-forming plastic film - by smoothing back of film when heated by blown hot air system which is uniform and can also apply cooling air and save energy

Publications (1)

Publication Number Publication Date
DE4023878A1 true DE4023878A1 (en) 1992-01-30

Family

ID=6411126

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904023878 Withdrawn DE4023878A1 (en) 1990-07-27 1990-07-27 Equipment for thermo-forming plastic film - by smoothing back of film when heated by blown hot air system which is uniform and can also apply cooling air and save energy

Country Status (1)

Country Link
DE (1) DE4023878A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7390454B2 (en) * 2004-08-19 2008-06-24 General Motors Corporation Thermoforming process for producing class “A” finish, high gloss automotive exterior parts
EP2130660A1 (en) 2008-06-02 2009-12-09 International Automotive Components Group GmbH Device and method for producing slush skins
DE102014107847A1 (en) 2014-06-04 2015-12-17 Eschmann Textures International Gmbh Mold for the production of a plastic body made of a thermoplastic material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218043A1 (en) * 1985-08-13 1987-04-15 Tokai Chemical Industries, Ltd. Powder slush molding method
EP0334073A2 (en) * 1988-03-23 1989-09-27 Krauss-Maffei Aktiengesellschaft Method and apparatus for producing formed plastic sheets
EP0334074A2 (en) * 1988-03-23 1989-09-27 Krauss-Maffei Aktiengesellschaft Method and apparatus for producing formed plastic sheets

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218043A1 (en) * 1985-08-13 1987-04-15 Tokai Chemical Industries, Ltd. Powder slush molding method
EP0334073A2 (en) * 1988-03-23 1989-09-27 Krauss-Maffei Aktiengesellschaft Method and apparatus for producing formed plastic sheets
EP0334074A2 (en) * 1988-03-23 1989-09-27 Krauss-Maffei Aktiengesellschaft Method and apparatus for producing formed plastic sheets

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7390454B2 (en) * 2004-08-19 2008-06-24 General Motors Corporation Thermoforming process for producing class “A” finish, high gloss automotive exterior parts
EP2130660A1 (en) 2008-06-02 2009-12-09 International Automotive Components Group GmbH Device and method for producing slush skins
DE102008026365A1 (en) * 2008-06-02 2010-01-07 International Automotive Components Group Gmbh Apparatus and method for producing slush hides
DE102008026365B4 (en) * 2008-06-02 2010-11-18 International Automotive Components Group Gmbh Apparatus and method for producing slush hides
DE102014107847A1 (en) 2014-06-04 2015-12-17 Eschmann Textures International Gmbh Mold for the production of a plastic body made of a thermoplastic material

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Legal Events

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OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee