HONEYCOMB FILLER IMPREGNATION METHOD Russian patent published in 2006 - IPC B29B15/10 B32B38/08 C08J5/24 

FIELD: methods for impregnating honeycomb fillers for making three-layer panels and envelopes used in different branches of industry.

SUBSTANCE: honeycomb filler in the form of honeycomb blocks prepared from non-cut expanded honeycomb packs of glass cloth is subjected to impregnation. First honeycomb block fixed in frame is descended onto grid arranged on bottom of empty impregnating bath with reliably closing lid being in its limit upper position. Impregnating bath is communicated through opening in its bottom and connection hose with buffer bath reliably closed with lid, filled with solution of polymeric binder and placed in limit lower position. At simultaneous motion of both baths one towards other cells of first honeycomb block are filled with polymeric binder while keeping block in impregnating bath in limit lower position for time period necessary for impregnation of honeycomb block. Simultaneously second expanded honeycomb block fixed in frame is loaded into empty buffer bath. Simultaneous motion of both baths in reverse direction is provided for discharging excess solution of polymeric binder from cells of first honeycomb block used for filling cells of second honeycomb block. Second honeycomb block is kept in solution of polymeric binder in buffer bath for time period necessary for impregnating it. Simultaneously first impregnated honeycomb block is removed out of empty impregnating bath and third honeycomb block is loaded into it for repeating cycle.

EFFECT: uniform application of polymeric binder along length of cells ducts at impregnating large size honeycomb blocks of glass cloth, prevention of quick evaporation of dissolving agent at using easily inflammable liquid as such agent.

1 tbl, 4 ex