Method of making mirror blanks including blanks made according to said
method
    1.
    发明授权
    Method of making mirror blanks including blanks made according to said method 失效
    制造包括根据所述方法制成的坯料的镜子坯料的方法

    公开(公告)号:US4364763A

    公开(公告)日:1982-12-21

    申请号:US228066

    申请日:1981-01-26

    摘要: The method is characterized by moulding at least one slab of a thermoplastic, normally solid material under heat treatment against a matrix having a form substantially matching that of the final mirror to form a shell (6) introducing into the shell a material selected from the group consisting of; (1) glass bubbles of a thermoplastic, normally solid material; (2) a composition of a powder of a thermoplastic, normally solid material together with an expanding agent, and; (3) mixtures thereof, and bringing the glass bubbles and the powder particles of the composition resp., the latter after expansion, to adhere, on one hand to each other, and on the other to the shell to form a porous supporting structure. The mirror blank according to the invention comprises a shell (6) of a thermoplastic, normally solid material and a supporting structure of the material in said group filling the shell, the glass bubbles and the powder particles resp. being attached to each other and to the shell. If sheet glass is used for the shell and as a powder in the composition, the composition will further include 0-2% by weight of viscosity reducing Li.sub.2 CO.sub.3 and 4% by weight of CaCO.sub.3 as an expansion agent (all counted on the glass powder).

    摘要翻译: PCT No.PCT / SE80 / 00151 Sec。 371日期1981年1月26日 102(e)日期1981年1月26日PCT提交1980年5月23日PCT公布。 出版物WO80 / 02684 日期为1980年12月11日。该方法的特征在于,在热处理下将至少一块热塑性常规固体材料的板坯与基本上与最终反射镜的形状基本相同的基体的基体成型,形成引入到 选自由以下组成的组的材料: (1)热塑性塑料,通常为固体材料的玻璃泡; (2)热塑性常规固体材料与发泡剂一起的粉末组合物,和 (3)其混合物,并使组合物的玻璃泡和粉末颗粒在膨胀后相互粘合,另一方面彼此粘附到壳上以形成多孔支撑结构。 根据本发明的镜子坯料包括热塑性常规固体材料的壳体(6)和填充壳体的所述组中的材料的支撑结构,玻璃气泡和粉末颗粒。 被连接到壳体上。 如果在组合物中使用片状玻璃作为粉末,则组合物还包括0-2重量%的降低Li 2 CO 3的粘度和4重量%的作为膨胀剂的CaCO 3(均在玻璃粉末上计数) 。