公开(公告)号：US11504922B2

公开(公告)日：2022-11-22

申请号：US16087046

申请日：2016-03-23

Applicant: Donkervoort Automobielen B.V.

Inventor： Jacob Adrianus Donkervoort ,  Jordi Wiersma

IPC: B29C70/08 ,  B32B27/38 ,  B29C70/02 ,  B32B27/06 ,  B32B5/20 ,  B32B5/24 ,  B32B27/08 ,  B32B5/18 ,  B32B5/26 ,  B29C44/04 ,  B29C44/12 ,  B29C44/34 ,  B29C44/60 ,  B29C70/44 ,  B29L9/00 ,  B29K105/00 ,  B82Y30/00

Abstract: The present invention relates to multi-layered composite structures and to methods for the preparation thereof. The present multi-layered composite structures are light weight and capable of high load bearing making the present multi-layered composite structures especially suitable to be used as load bearing structures in, for example, automotive. Specifically, the present invention relates to methods comprising the steps of a) providing a mould for said multi-layered composite structure; b) layering said mould with two or more layers forming the outer surface of said multi-layered composite; c) filling said layered mould with a mixture comprised of non-expanded heat-expandable microspheres and closing said mould; and d) subjecting said closed mould to a temperature of 80° C. to 140° C. during 1 to 230 minutes thereby providing a relative pressure in said closed mould of 0.1 to 20 bar through expansion of said heat-expandable microspheres thereby forming a multi-layered composite structure in said mould with a foam enforced inner core and a multi-layered outer surface; and e) separating the multi-layered composite structure from said mould.

公开(公告)号：US20190099963A1

公开(公告)日：2019-04-04

申请号：US16087046

申请日：2016-03-23

Applicant: Donkervoort Automobielen B.V.

Inventor： Jacob Adrianus Donkervoort ,  Jordi Wiersma

IPC: B29C70/08 ,  B29C44/04 ,  B29C44/12 ,  B29C44/34 ,  B29C44/60 ,  B29C70/02 ,  B29C70/44

Abstract: The present invention relates to multi-layered composite structures and to methods for the preparation thereof. The present multi-layered composite structures are light weight and capable of high load bearing making the present multi-layered composite structures especially suitable to be used as load bearing structures in, for example, automotive. Specifically, the present invention relates to methods comprising the steps of a) providing a mould for said multi-layered composite structure; b) layering said mould with two or more layers forming the outer surface of said multi-layered composite; c) filling said layered mould with a mixture comprised of non-expanded heat-expandable microspheres and closing said mould; and d) subjecting said closed mould to a temperature of 80° C. to 140° C. during 1 to 230 minutes thereby providing a relative pressure in said closed mould of 0.1 to 20 bar through expansion of said heat-expandable microspheres thereby forming a multi-layered composite structure in said mould with a foam enforced inner core and a multi-layered outer surface; and e) separating the multi-layered composite structure from said mould.