| 摘要 |
The invention relates to a method and a device for producing thick-walled plastic parts, especially blanks for optical lenses. The invention consists of a two-step method in order to produce thick-walled lenses with high optical qualities and homogeneous material properties. The inventive method comprises the following steps; in the first step, a thin lens is produced by injection moulding; in the second step, said lens is enlarged until the final maximum thickness thereof, i.e. blown up , by introducing plastic material.
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