Patent ID: 6767496
Filing Date: 2004-07-27
Classification: A61M,B29C,B29K,B29L

Abstract:
A method for producing a plastic needle, which needle has two ends, wherein at least the outer diameter of one end is less than 0.50 mm, said needle further having a longitudinal lumen extending between two openings of the needle, in a moulding system having an assembly comprising a feed system and a mould cavity, wherein an insert is corresponding to the lumen of the needle for forming the lumen in the needle, said method comprising the following steps:introducing a melt of plastic into the feed system, increasing the melt pressure gradually during melt passage through the feed system, passing the melt into the mould cavity whereby the melt solidifies to a needle, the mould cavity being substantially filled in a period of time from 0.1 to 10 msec, and removing the needle from the mould cavity.