| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection apparatus for an injection molding improved in a plasticizing capacity, suppressed in increase of the total height and width, and capable of evenly plasticizing resin material.SOLUTION: A screw has a coaxial double screw structure, and an inner second screw 17 is projected backward from an outer first screw 16 so that a first resin flow passage 10 and a second resin flow passage 11 for supplying resin material from two material supply parts respectively are formed on each screw. In a metering process, the resin material plasticized in the first resin flow passage 10 and the resin material plasticized in the second resin flow passage 11 are joined together by a communication resin flow passage 21 communicating the first resin flow passage 11 and an outer circumference surface of the second screw 17 and kneaded, and then the resin material are metered and filled by the second screw 17 with a reverse flow preventing ring 18 provided thereon. |
