Constant temperature and pressure composite spinning head apparatus

The invention relates to a constant-temperature constant-pressure composite spinneret device. A goose neck pipe 22 is connected with a spinneret seat18 through a screw 24; a sealing ring 23 is arranged between the goose neck pipe 22 and the spinneret seat 18; a cone-shaped body 13 is connected with a cone-shaped body sealing gasket 14, a filter screen 16, a distribution plate 15, a middle sealing gasket 10, a flow guiding plate 9, a front sealing gasket 8 and a spinneret cover 6 through a screw 12; a screw sealing gasket 11 is arranged between the screw 12 and the spinneret cover 6; the spinneret cover 6 is connected with the spinneret seat 18 through a screw 7; at the back end of the filter screen 16, a back sealing gasket 17 is arranged on the spinneret seat 18; a sealing ring 20 is arranged between the flow guiding plate 9 and the spinneret seat 18; a sealing ring 19 is arranged between the spinneret cover 6 and the spinneret seat 18; an influent connection pipe 21 and the spinneret seat 18 are connected t