US 12,226,929 B2
Component made from a material consisting predominantly of renewable raw materials, having at least one compressed region, and method and tool for producing the compressed region
Christoph Alt, Chemnitz (DE); Eric Penno, Jahnsdorf (DE); Sven Eichhorn, Leipzig (DE); and Ronny Eckardt, Leubsdorf (DE)
Assigned to LIGenium GmbH, Chemnitz (DE)
Appl. No. 17/630,950
Filed by Technische Universität Chemnitz, Chemnitz (DE)
PCT Filed Jul. 31, 2020, PCT No. PCT/DE2020/100684
§ 371(c)(1), (2) Date Jan. 28, 2022,
PCT Pub. No. WO2021/018354, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 202019104241.9 (DE), filed on Aug. 1, 2019.
Prior Publication US 2022/0274282 A1, Sep. 1, 2022
Int. Cl. B32B 3/26 (2006.01); B27M 1/04 (2006.01); B29C 70/54 (2006.01); B32B 15/10 (2006.01); B32B 21/04 (2006.01); B32B 21/06 (2006.01); B32B 21/08 (2006.01)
CPC B27M 1/04 (2013.01) [B29C 70/545 (2013.01); B32B 3/266 (2013.01); B32B 15/10 (2013.01); B32B 21/042 (2013.01); B32B 21/06 (2013.01); B32B 21/08 (2013.01)] 4 Claims
OG exemplary drawing
 
1. Component made of a material comprised predominantly of renewable raw materials, characterized in
that the component (1)
consists of plywood
or
is designed in the form of a board and comprises at least three layers with renewable raw materials, which are combined with further material layers, wherein the component has one or more material layers of metal, plastic, fiber composite material, paper or cardboard or a combination of these material layers,
and
that the component has at least one hole (L) with a longitudinal axis (A1) serving to produce a connection by means of a screw connection to a second component in order to produce a connection by means of a screw connection
and
that the material of the component (1) in a region adjoining the hole (L) on the circumferential side has
local compression (V) realizing a permanently slip-resistant pretensioned connection point for the screw connection generated via the penetration and the subsequent removal of a rotating pin with a cylindrical shank (3) and a tip (4) which reduces in a diameter in the direction towards the component (1)
wherein the hole (L) is a cylindrical or nearly cylindrical hole (L) and is designed as a through-hole in the component (1) or has a bottom
and
that a region of the component (1) adjoining the hole (L) on the circumferential side has radial and/or axial local compressions (V)
and
that the hole (L) has a diameter (d) and
a circumference (dv) of a compressed region adjoining the hole (L) on the circumferential side is up to 5×d
and/or
that the height (hv) of the compressed region is up to 20×d and/or is reduced in comparison with the height (h) of the component (1).