| 摘要 |
<p>The invention relates to a multi-component injection moulding method for producing a sleeve-shaped preform as well as to a perform which has at least two layers, said method comprising at least two process steps including at least two cavities and at least one injection mould core that can be used for both cavities, and wherein during the first process step, the first layer which has at least one first and at least one second area extending partially in the circumferential direction of the preform, is injected onto the injection mould core within the first cavity, with the second area having a substantially lower layer thickness than the first area, and during the second process step, the second layer is deposited on the first layer which is located on the injection mould core in the second cavity in such a way that only the second area of the first layer is completely covered by the second layer, or during the first process step, the first area of the first layer is deposited partially on the injection mould core within the first cavity, with the remaining areas being covered by the second layer during a second process step within a second cavity..</p> |
