| 摘要 |
<p>This invention relates to a method for producing a plastic work piece to a spiral shaped vacuum cleaner hose. The work piece is produced by means of an extrusion method through a nozzle opening shaped as a continuous slot having at least two aligned, mainly flat parts (26, 27) that are separated by means of a, from the flat parts extending, mainly U-shaped first part (28). One of the flat parts (26) is connected to a second mainly U-shaped part (29) whereas the second flat part (27) is connected to a flange shaped portion (21) extending from the second flat part and intended to be joint to the second U-shaped part (29). The work piece is after extrusion mainly stretched to its final shape between the nozzle (11) and a guide (15) that is dimensioned such that its shape mainly corresponds to the final work piece the dimensions of the final work piece being considerably less than the dimensions of the nozzle opening. The work piece is in connection to the guide cooled by means of a liquid (14) the nozzle being directed such that the work piece during extrusion leaves the nozzle (11) at an angle with respect to the liquid surface. The invention also relates to a device for manufacturing said hose and a hose produced according to the method.</p> |
