Patent ID: 8419407
Filing Date: 2013-04-16
Classification: B29C,B29K,B29L

Abstract:
1. An extruder comprising: a housing having a circular tube section provided with a supply opening and an exhaust opening for a material; a screw rotatably assembled in the circular tube section, conveying the material supplied from the supply opening to the exhaust opening while kneading the material between itself and an inner peripheral surface of the circular tube section, and extruding the material; a feed roller assembled in parallel to and adjacent to the screw near the supply opening, rotating together with the screw, and feeding the material supplied from the supply opening toward the exhaust opening; and a scraper having a scraping part that scrapes the material from the surface of the feed roller, and a guide surface that guides the scraped material to the inner peripheral surface of the circular tube section, wherein the housing has a feed roller support portion that rotatably supports the feed roller and that is assembled so as to make operation of opening/closing the circular tube section performed in such a way that the feed roller moves apart from the screw to open the hollow in the cylinder part, and the scraper is attached to the feed roller support portion so as to open a border between the guide surface and the inner peripheral surface of the cylinder part at the time of opening operation of the feed roller support portion.