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PULTRUSION PROCESS AND PULTRUSION DEVICE FOR PRODUCING A SHARPENABLE PENCIL
PULTRUSION PROCESS AND PULTRUSION DEVICE FOR PRODUCING A SHARPENABLE PENCIL
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机译:用于生产可削尖铅笔的推挤过程和推挤装置
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摘要
The present invention relates to a device and a method for centring pencil cores and for producing sharpenable pencils (23), in particular lead pencils and coloured pencils with a centred core (3), wherein the pencils (23) comprise a casing (24), which encloses the core (3) and comprises a fibre-reinforced polymer (2, 15, 16, 17), and are produced by pultrusion. The invention also relates to pencils (29) that can be produced by this process and preferably comprise renewable raw materials such as itaconic acid esters.
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