| 摘要 |
PROBLEM TO BE SOLVED: To permit the elimination of a temperature difference in a molten resin, flowing from the outlet port of a crosshead into a joint, by a method wherein a cylindrical main body is provided with the inlet port and the outlet port of the molten resin at the fore end and the rear end of the same respectively so as to be coaxial with the main body. SOLUTION: A molten resin, flowing into an inner chamber 202a, is moved to the side of a rear end along the rear end unit 210 of a cone and is supplied into a die through an outlet port 211 and flow passages 213, 214, 301. The cylindrical main body 201 of a cross had 200 is provided with an inlet port 204 and an outlet port 211 at the fore end and the rear end of the same so as to be coaxial with the main body 201 while a breaker unit 206 is also provided so as to be coaxial with the main body 201. Accordingly, the staying period of time of the molten resin, passing through any side of a space 202, which is shown by F3 , or F4 , for example, becomes constant substantially. According to this method, the temperature of the molten resin, flowing from the outlet port 211 into the flow passage 213, can be unified. |
