US 11,731,339 B2
Tilting measurement of a thermoforming mould
Klaus Weibler, Bretzfeld-Bitzfeld (DE)
Assigned to Marbach Werkzeugbau GmbH, Heilbronn (DE)
Appl. No. 17/257,357
Filed by Marbach Werkzeugbau GmbH, Heilbronn (DE)
PCT Filed Jul. 5, 2019, PCT No. PCT/EP2019/068060
§ 371(c)(1), (2) Date Dec. 31, 2020,
PCT Pub. No. WO2020/016024, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 10 2018 117 328.8 (DE), filed on Jul. 18, 2018.
Prior Publication US 2021/0402672 A1, Dec. 30, 2021
Int. Cl. B29C 51/46 (2006.01); B29C 51/08 (2006.01); B29C 51/30 (2006.01); B29L 31/00 (2006.01)
CPC B29C 51/46 (2013.01) [B29C 51/082 (2013.01); B29C 51/30 (2013.01); B29L 2031/7132 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A thermoforming mould assembly configured to be installed in a thermoforming machine for producing cup-shaped articles from a heated film of plastic comprising a first mould part and a second mould part, which are movable in relation to one another, wherein at least one cavity for moulding a cup-shaped article is formed in one of the two mould parts, wherein the thermoforming mould comprises a measuring device which is designed to determine a tilting of the first mould part and the second mould part with respect to one another, wherein the measuring device comprises:
at least two sensors, wherein the at least two sensors are arranged spaced apart from one another on one of the two mould parts; and
at least two reference elements associated with the at least two sensors and arranged on the other one of the two mould parts and opposite to the at least two sensors, wherein each of the at least two sensors is designed to measure a distance to the reference element with which it is associated,
wherein the measuring device further comprises an evaluation device designed to determine the tilting of the two mould parts with respect to one another by comparing the measured distances of the at least two sensors to the corresponding reference elements.