| 摘要 |
The method of cleaning the extrusion head involves the following steps: a rinsing fluid is injected at pressure into the extrusion head through a channel (19) belonging to the arresting valve (18) and more particularly the adaptor (29) and the duct (26) comprising an axial bore (27) and an oblique bore (28), in such a way that this rinsing fluid follows the exact same path as is followed by the synthetic material during normal operation, and is discharged via an orifice with a controlled shutoff means mounted close to the extrusion head outlet. <IMAGE>
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