Die/di for multilayer inflation film formation

摘要

(57) Abstract Objective By the fact that improvement is added to the band by torque of desireinhu which can join the mandrel which is laid out concentrically justThe die/di for ration film formation is offered to the market Constitution Mandrel 21 for inner layer, mandrel for centerClose doing 23 and the mandrel 24 for outside formation concentrically consecutivelyThe superposition it fits mutually. On mandrel 21 for this inner layerThe joint ring 25 which is superposed concentrically and ma for outside formationndoreru 24, inside, mandrel 21 for intercellular layer and 23Together common fastening device (50 and 51) with from the top and bottom keepingThe te, resolution it joins as one unit unrestrictedly. Under this joint ring 25Surface and mandrel 21 for aforementioned inner layer, mandrel 2 for centerIn gap of top of 3 and mandrel 24 for outside formation, theseCylindrical resin path 11, 12 and 13 in single annular emission opening 37The confluence resin path 26 which it communicates is formed.