US 11,654,642 B2
Process and apparatus for chemical smoothing of plastic parts
Florian Pfefferkorn, Munich (DE)
Assigned to LuxYours E.K, Planegg (DE)
Appl. No. 16/981,317
Filed by LuxYours E.K., Munich (DE)
PCT Filed Mar. 4, 2019, PCT No. PCT/EP2019/055312
§ 371(c)(1), (2) Date Sep. 16, 2020,
PCT Pub. No. WO2019/179755, PCT Pub. Date Sep. 26, 2019.
Claims priority of application No. 10 2018 002 401.7 (DE), filed on Mar. 22, 2018.
Prior Publication US 2021/0008819 A1, Jan. 14, 2021
Int. Cl. B29C 37/02 (2006.01); B29C 71/02 (2006.01); F26B 3/20 (2006.01); F26B 9/06 (2006.01); F26B 21/14 (2006.01); F26B 25/14 (2006.01); B29C 71/00 (2006.01); B33Y 40/20 (2020.01); B33Y 40/00 (2020.01); F26B 25/00 (2006.01); B29C 64/379 (2017.01); B29C 64/188 (2017.01)
CPC B29C 71/009 (2013.01) [B29C 71/0009 (2013.01); B33Y 40/00 (2014.12); B33Y 40/20 (2020.01); F26B 25/001 (2013.01); B29C 64/188 (2017.08); B29C 64/379 (2017.08)] 18 Claims
OG exemplary drawing
 
1. A process for chemical smoothing of a plastic part (10), comprising the following steps:
positioning the plastic part (10) in a first chamber (1, 301) filled with a gas or a gas mixture (7);
filling a second chamber (2, 302) with a solvent vapour (8) comprising a solvent;
temperature-controlling the first chamber (1, 301) to a first temperature by using a first heating means to thus temperature-control the plastic part (10) at least approximately to the first temperature;
temperature-controlling the second chamber (2, 302) to the second temperature by using a second heating means to thus temperature-control the solvent vapour (8) at least approximately to the second temperature;
introducing the solvent vapour (8) from the second chamber (2, 302) into the first chamber (1, 301);
wherein the step of introducing the solvent vapour (8) from the second chamber (2, 302) into the first chamber (1, 301) comprises that the volume of the second chamber (2, 302) is reduced;
subjecting the plastic part (10) to the solvent vapour (8) temperature-controlled to the second temperature for a particular duration,
wherein the subjecting of the plastic part (10) to the solvent vapour (8) has the result that an outer layer of the plastic part (10) is liquefied; and
discharging at least a portion of the solvent vapour (8) after the particular duration,
wherein the plastic part (10) is stationary from commencement of the temperature-controlling of the plastic part until termination of the discharging of the solvent vapour (8).