US 11,865,741 B2
Tool, tool system and method for the production of particle foam parts
Victor Romanov, Wertheim (DE)
Assigned to Kurtz GmbH & Co. KG, Kreuzwertheim (DE)
Appl. No. 17/768,506
Filed by Kurtz GmbH & Co. KG, Kreuzwertheim (DE)
PCT Filed Oct. 5, 2020, PCT No. PCT/EP2020/077858
§ 371(c)(1), (2) Date Apr. 13, 2022,
PCT Pub. No. WO2021/073924, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 102019127680.2 (DE), filed on Oct. 15, 2019.
Prior Publication US 2023/0182350 A1, Jun. 15, 2023
Int. Cl. B29C 35/08 (2006.01); B29C 44/44 (2006.01)
CPC B29C 35/0805 (2013.01) [B29C 44/445 (2013.01); B29C 2035/0855 (2013.01); B29C 2035/0861 (2013.01)] 24 Claims
 
1. A tool for production of particle foam parts through welding of foam particles by means of electromagnetic waves, comprising two mould halves which bound a mould cavity, wherein at least one of the two mould halves is made of a material which is transparent to electromagnetic waves and has a boundary wall which bounds the mould cavity and one or more supports serving to support the boundary wall on a capacitor plate on a side facing away from the mould cavity and forming one or more hollow spaces between the boundary wall and the capacitor plate, and wherein a relation of a volume of the one or more supports and air within the one or more hollow spaces of the two mould halves is adjusted such that a resulting relative permittivity of the tool is adapted to a relative permittivity of the foam particles, such that a temperature in the foam particles is levelled as a whole or can be locally adjusted at need.