Coextrusionsverfahren durch Koaxialröhren

摘要

Manufacture of a co-extruded food product with an enveloping cover and a filling uses a co-extrusion pipe. In a first section of the pipe, material forming the cover cools and solidifies and cannula extend through it to supply the filling to a second section. In the second section the filling is inserted into the cover. The filled product is collected at the exit of the pipe. Independent claims are included for the following: (a) equipment for performing the above includes sources of the cover and filling and devices transferring them to a co-extrusion chamber without mixing. The chamber opens into a co-extrusion head and the tube and cannula extend from the head; (b) a filled food product made as above has an internal transverse dimension ≤ 20 mm, e.g. 10 - 20 mm; (c) a food product is breakable block of assembled products as in (b). Preferred Features: Store hoppers for the filling and cover are kept at about 90 degrees C. The filling and cover are pumped separately through heat exchangers to cool them 60 degrees C when they reach the head. The first pipe section is water cooled so the envelop is about 50 degrees C. The second section is about 30 degrees C so the product leaves the pipe at about 38 degrees C. The pipe and cannula can have the same or different cross section. The pipe is 1 to 5 times the size of the cannula.