EP 1005412 A1 20000607 - METHOD AND DEVICE FOR HOT-FORMING THERMOPLASTICS
Title (en)
METHOD AND DEVICE FOR HOT-FORMING THERMOPLASTICS
Title (de)
VERFAHREN UND VORRICHTUNG ZUM WARMVERFORMEN VON THERMOPLASTEN
Title (fr)
PROCEDE ET DISPOSITIF DE FA ONNAGE A CHAUD DE THERMOPLASTES
Publication
Application
Priority
- DE 19736462 A 19970821
- EP 9805266 W 19980819
Abstract (en)
[origin: DE19736462A1] Prior to forming the preform is heated to the required temperature by exposing it to controlled radiation. The maximum intensity of the radiation is in a wavelength for which the material has low absorbtivity, i.e. higher transmissibility than for longer wavelengths. An Independent claim is also included for blow moulding, deep drawing, or other thermal forming installations which have a radiant pre-heater. The emitted radiation spectrum is controlled to give a maximum in the low absorbtivity region of the material. Preferred Features: The maximum radiation intensity is in the near infrared at a wavelength of 0.8-1.0 mu m where the thermoplastic has an absorption band not exceeding 50%. The output of a halogen lamp is controlled by regulating the winding temperature and by using filters or choppers, and is distributed by mirrors or grids.
IPC 1-7
IPC 8 full level
B29B 13/02 (2006.01); B29C 35/02 (2006.01); B29C 35/08 (2006.01); B29C 49/64 (2006.01); B29C 51/42 (2006.01); H05B 3/00 (2006.01); B29C 49/78 (2006.01)
CPC (source: EP)
B29C 35/0288 (2013.01); B29C 35/08 (2013.01); B29C 49/6418 (2013.01); B29C 49/6436 (2013.01); B29C 51/422 (2013.01); H05B 3/0057 (2013.01); B29C 49/78 (2013.01); B29C 2035/0822 (2013.01)
Citation (search report)
See references of WO 9910160A1
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI SE
DOCDB simple family (publication)
DE 19736462 A1 19990225; DE 19736462 C2 20030618; AU 9435998 A 19990316; BR 9811610 A 20000905; CA 2301053 A1 19990304; CN 1267253 A 20000920; EP 1005412 A1 20000607; JP 2001513465 A 20010904; JP 4562284 B2 20101013; WO 9910160 A1 19990304
DOCDB simple family (application)
DE 19736462 A 19970821; AU 9435998 A 19980819; BR 9811610 A 19980819; CA 2301053 A 19980819; CN 98808333 A 19980819; EP 9805266 W 19980819; EP 98947440 A 19980819; JP 2000507520 A 19980819