Patent ID: 9616599
Date: 2017-04-11
CPC Classifications: B29C,B29K,B29L

Claim:
1. A method for the continuous production of an endless string of polyurethane reactive plastic material, comprising the steps of: a) at first conveying reactive components polyol and isocyanate to a mixer in a metered manner; b) mixing the reactive components in the mixer to a reactive mixture; c) subsequently discharging the reactive mixture into environmental atmosphere; d) coating a first sheet section made from a planar, flexible material, which is conveyed continuously in a transporting direction, with the reactive mixture; e) guiding the first sheet section across a guiding element, which has a concave section and a flat section which follows the concave section in the transporting direction; f) feeding two lateral sheet sections to the first sheet section, wherein the feeding occurs into two lateral end sections of the first sheet section; and g) merging the two lateral sheet sections and the first sheet section so that the two lateral sheet sections extend upward from a surface of the first sheet section forming a structure for reception of the reactive mixture between the two lateral sheet sections, the two lateral sheet sections and the first sheet section being moved continuously in the transporting direction, wherein the first sheet section is connected with the lateral sheet sections in a sealed manner so that no reactive mixture leaks into the surrounding atmosphere between the sheet sections.