| 摘要 |
PROBLEM TO BE SOLVED: To provide a co-extrusion apparatus capable of easily replacing layered constitution by a plug type, making the crosssectional shape of a resin port round to reduce a dead space of a molten resin to the utmost, capable of properly corresponding to a resin inferior to heat stability and capable of realizing the multidivision of a plug in order to constitute more layers. SOLUTION: A distribution plug 52 equipped with the resin ports communicating with a plurality of the molten resin supply ports 48a, 48b, 48c provided in a junction block 40 and introducing a molten resin into the supply ports to distribute the same to many layers is provided in the almost central part of the junction block 40 and the resin ports of the distribution plug 52 are constituted as round circulation holes 56a, 56b, 56c flowing through the interior and/or exterior of the plug 52. |
