TWO-CHANNEL EXTRUSION HEAD FOR MANUFACTURE OF POLYMERIC CONSTRUCTIONAL PLATBANDS Russian patent published in 2005 - IPC

FIELD: chemical industry; equipment for production of polymeric constructional materials.

SUBSTANCE: the invention is pertaining to devices for production of polymeric constructional materials, in particular, to production of a two-channel extrusion head for manufacture of the polymeric constructional platbands and may be used in chemical industry for production of polymeric constructional platbands. The extrusion head contains a sectional body and a located in it insert with channels for chilling, which form between themselves a molding slit of a profile cross-section. The molding slit consists of two molding channels communicating with a feeding channel. The profile cross-sectional insert has four in symmetry located in it prominences with a form-shaping external surface in the form of a parabolic curve with a constant of curvature K = 0.05 l/mm. The invention ensures improvement of the quality of the constructional platbands due to selection of optimal geometry of the cross section of molding channels.

EFFECT: the invention ensures improvement of the quality of the constructional platbands due to selection of optimal geometry of the cross section of molding channels.

4 dwg