FIELD: technique for manufacture of bristles from thermoplastic polymers by pressure casting process.
SUBSTANCE: apparatus has device for creating of injection pressure and casting mold comprising feed channel for polymeric melt and cavity made as molding channel. Molding channel is contoured and has length and shape of section enabling manufacture of bristle. Air removal means has air removal sections distributed along the entire length of molding channel. Sections in cooperation with injection pressure are designed for creating shearing flow with high axial speed in center of polymeric melt and high shearing action of molding channel wall. Device for creating of injection pressure is designed for creation of injection pressure, preferably, of at least 500 bar (0.5x105 kPa).
EFFECT: increased efficiency in producing of high-quality bristles having wider range of lengths with relatively small sections.
7 cl, 85 dwg
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