| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a production method for a drain tube which comprises a silicone rubber elastic body while being soft with a spiral rib on the internal surface thereof and enables the draining of the blood and the body liquor by securing a passage without completely closing the tube even when the cross-sectional area of the passage is reduced under the kinking and decompression. <P>SOLUTION: In the production method for the drain tube comprising the silicone rubber elastic body with the rib on the internal surface thereof, a crosshead die is used to make a mandrel with one or more grooves cut therein pass through the crosshead die almost parallel with an extrusion line while a resin supplying device is used to inject a raw silicone rubber so that it flows on the external surface of the mandrel from the direction almost vertical to the extrusion line. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
