IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0680360
(2008-09-26)
|
등록번호 |
US-8168110
(2012-05-01)
|
우선권정보 |
DE-10 2007 046 472 (2007-09-28) |
국제출원번호 |
PCT/EP2008/008182
(2008-09-26)
|
§371/§102 date |
20100326
(20100326)
|
국제공개번호 |
WO2009/043539
(2009-04-09)
|
발명자
/ 주소 |
- Niebling, Curt
- Meyer, Klaus
|
출원인 / 주소 |
|
대리인 / 주소 |
Connolly Bove Lodge & Hutz LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
8 |
초록
▼
Process for the production of an at least partly printed, metallized and/or otherwise coated thermoformed film part with at least the following process steps: a flat film piece which is at least partly printed, metallized and/or otherwise coated on one or on both surface(s) and is made of at least o
Process for the production of an at least partly printed, metallized and/or otherwise coated thermoformed film part with at least the following process steps: a flat film piece which is at least partly printed, metallized and/or otherwise coated on one or on both surface(s) and is made of at least one thermoplastic, and which includes at least one film section which corresponds to the thermoformed part to be produced with respect to size and printing, metallizing and/or coating is provided;this film piece is mounted in a defined arrangement on a frame, only the edge sections of the film piece lying on the frame;the film piece lying on the frame in this way is introduced into a heating zone, and at least the film section is heated there to a given temperature; andthe film piece heated in this way is introduced rapidly into a forming zone and is charged there immediately and directly with a fluid pressure means under a pressure means pressure of greater than 20 bar and is formed isostatically to give the desired thermoformed part within a period of time of less than 5 sec. characterized in that such a heating is carried out so that at least one side of the entire film section or of the predominant part of the film section has a film surface temperature in the range of from 10 to 65° C. above the Vicat softening temperature B/50.
대표청구항
▼
1. A process for producing an at least partly printed, metallized, and/or otherwise coated thermoformed film part comprising: providing a flat film piece which is (1) at least partly printed, metallized, and/or otherwise coated on one surface of said flat film piece or on both surfaces of said flat
1. A process for producing an at least partly printed, metallized, and/or otherwise coated thermoformed film part comprising: providing a flat film piece which is (1) at least partly printed, metallized, and/or otherwise coated on one surface of said flat film piece or on both surfaces of said flat film piece, (2) comprises at least one thermoplastic, and (3) comprises at least one film section which corresponds to the thermoformed part to be produced with respect to size and printing, metallizing, and/or coating;mounting said flat film piece in a defined arrangement on a frame, wherein only the edge sections of said flat film piece are lying on the frame;introducing said flat film piece mounted on said frame into a heating zone, wherein at least said at least one film section is heated to a given temperature; andrapidly introducing said heated flat film piece into a forming zone and charging said heated flat film immediately and directly with a fluid pressure means under a pressure means pressure of greater than 20 bar to isostatically form the desired thermoformed part in less than 5 seconds; wherein said heating is carried out as contactless heating so that at least one side of the entire said at least one film section or of the predominant part of said at least one film section has a film surface temperature in the range of from 10° C. to 65° C. above the Vicat softening temperature B/50. 2. The process of claim 1, wherein said at least one thermoplastic is a polycarbonate or copolycarbonate based on a diphenol, a poly- or copolyacrylate, a poly- or copolymethacrylate, a poly- or copolymer of styrene, a thermoplastic polyurethane, a polyolefin, a poly- or copolycondensate of terephthalic acid, or mixture thereof. 3. The process of claim 1, wherein said at least one thermoplastic is polycarbonate, and wherein said heating is carried out so that at least one side of the entire said at least one film section or of the predominant part of said at least one film section has a film surface temperature in the range of from 180° C. to 200° C. 4. The process of claim 3, wherein said flat film piece mounted on said frame is kept in said heating zone for heating over a period of time at a distance from at least one heating field built up from a number of infrared surface heaters which can be activated individually;on the way from said heating zone to said forming zone said heated flat film piece passes a temperature measurement station wherein the temperature distribution on a surface of said heated flat film is scanned, rendered visible, and/or shown in another manner with the aid of a thermal imaging camera; andsaid heating is a differential heating wherein each individual infrared surface heater is activated individually in order to minimize the temperature differences on the film section which can be seen from the temperature distribution,heat at least one side of the predominant film section to a film surface temperature in the range of from 180° C. to 200° C., andoptionally heat individual selected film piece segments to a higher temperature which exceeds this film surface temperature by at least 3° C. and by not more than 10° C. 5. The process of claim 3, wherein at least one side of the entire said at least one film section or of the predominant part of said at least one film section is heated to a film surface temperature in the range of from 185° C. to 195° C. 6. The process of claim 1, wherein said at least one thermoplastic is polymethyl methacrylate, and wherein said heating is carried out so that at least one side of the entire said at least one film section or of the predominant part of said at least one film section has a film surface temperature in the range of from 130° C. to 150° C. 7. The process of claim 6, wherein said flat film piece mounted on said frame is kept in said heating zone for heating over a period of time at a distance from at least one heating field built up from a number of infrared surface heaters which can be activated individually;on the way from said heating zone to said forming zone said heated flat film piece passes a temperature measurement station wherein the temperature distribution on a surface of said heated flat film is scanned, rendered visible, and/or shown in another manner with the aid of a thermal imaging camera; andsaid heating is a differential heating wherein each individual infrared surface heater is activated individually in order to minimize the temperature differences on the film section which can be seen from the temperature distribution,heat at least one side of the predominant film section to a film surface temperature in the range of from 130° C. to 150° C., andoptionally heat individual selected film piece segments to a higher temperature which exceeds this film surface temperature by at least 3° C. and by not more than 10° C. 8. The process of claim 4, wherein said selected film piece segments are those in which a higher flexibilizing of the film material is to be achieved. 9. The process of claim 8, wherein said selected film piece segments are those in which a particularly high degree of forming of the originally flat film is to take place or in which an exact casting of sharp-edged contours, an accurately fitting reproduction of particularly finely divided embossings and/or engravings, and a correction of pressure-related deviations in position is to be achieved. 10. The process of claim 4, wherein a number of thermoformed film parts of the same type are produced; andthe measurement and evaluation of the temperature distribution on a film surface is carried out only during the production of some of all the thermoformed film parts of this type and not carried out during the production of the remaining portion of the thermoformed film parts of this type. 11. The process of claim 1, wherein said heating zone has two horizontally aligned heating fields of the same area arranged parallel at a distance from one another and aligned with one another, wherein, during heating, said flat film piece mounted on said frame is arranged approximately centrally between said two horizontally aligned heating fields and held there for a period of time. 12. The process of claim 1, wherein said heated flat film piece is transferred into said forming zone in less than 5 seconds. 13. The process of claim 1, wherein said heated flat film piece is transferred into said forming zone in less than 2 seconds. 14. The process of claim 1, wherein said flat film piece is transparent. 15. The process of claim 1, wherein said flat film piece is single-layered. 16. The process of claim 1, wherein said flat film piece is multi-layered coextruded film or laminate film of at least two different thermoplastics.
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