US 12,491,676 B2
Method for manufacturing a finished part
Thomas Meyer, Saint Ismier (FR); Agnès Exertier, Nantes (FR); Pascal Thobie, Treillieres (FR); and Jérémy Cailleteau, Saint-Aout (FR)
Assigned to Safran Seats, Plaisir (FR)
Appl. No. 17/762,331
Filed by Safran Seats, Plaisir (FR)
PCT Filed Oct. 13, 2020, PCT No. PCT/EP2020/078710
§ 371(c)(1), (2) Date Mar. 21, 2022,
PCT Pub. No. WO2021/074115, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 1911520 (FR), filed on Oct. 16, 2019.
Prior Publication US 2022/0388221 A1, Dec. 8, 2022
Int. Cl. B29C 51/16 (2006.01); B29C 51/08 (2006.01); B29K 27/06 (2006.01); B29K 55/02 (2006.01); B29L 31/30 (2006.01)
CPC B29C 51/16 (2013.01) [B29C 51/082 (2013.01); B29K 2027/06 (2013.01); B29K 2055/02 (2013.01); B29L 2031/3026 (2013.01); B29L 2031/3076 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing a finished part comprising:
a step of producing a finishing shell of an internal or external face of the finished part, said finishing shell being made of plastic material,
the step of producing the finishing shell comprising:
a step of heating a plate made of a plastic material to a temperature between 180° C. and 230° C., the plate having a thickness of about 1 mm,
a step of placing the heated plate in a position inside a first mold, the temperature of the first mold being lower than the temperature of the heated plate, the temperature of the first mold being between 90° C. and 150° C.,
a step of putting the heated plate in shape within the first mold,
a step of trimming the plate to obtain a trimmed finishing shell,
a step of placing the trimmed finishing shell inside a heated second mold chosen from a female mold and a male mold in a shape of a punch, said female mold having a shape complementary to the shape of the male mold, a temperature of the heated second mold in which the finishing shell is placed is lower than a melting temperature of a composite material of a structural part in order to promote cooling of the finished part, the temperature of the heated second mold being between 90° C. and 150° C.,
a step of heating the structural part made of the composite material up to the melting temperature of the composite material of the structural part, the melting temperature of the composite material of the structural part being between 250° C. and 300° C.,
a step of placing the structural part on the finishing shell,
a step of shaping the structural part against the finishing shell by means of the male mold cooperating with the female mold, so that the finishing shell joins with the structural part formed to obtain the finished part,
wherein the method further comprises a plastic material injection step during the step of shaping the structural part against the finishing shell so as to form a border on the structural part, wherein the plastic material injection step comprises laterally injecting a plastic material between the female mold and the male mold.