In the formation mannered null formation die which includes manner, and the aforementioned restoration manner in order to form the optical part in formation die restoration the organicity material

摘要

PROBLEM TO BE SOLVED: To provide a method of filling a molding mold with an organic material in a liquid state to mold an optical part.;SOLUTION: The filling method comprises a stage (A) of raising the flow rate from zero flow rate to a nominal flow rate(Dn) higher than 40 g/min, a stage (B) of filling at a maximum flow rate so as to keep the rate Dn, and a stage (C) of reducing the flow rate from the rate Dn to zero flow rate. The stage (A) has at least two phases: a filling-initiating phase at a low flow rate and a main flow-rate-raising phase(A2). The filling-initiating phase represents the period until a molding is filled with a material to the height of at least 2 mm from the lowest position of the mold, and the flow rate is increased to a maximum filling-initiating flow rate(Dd) lower than 20 g/min during the phase. The main phase A2 represents the period from the filling-initiating flow rate Dd to the nominal flow rate Dn.;COPYRIGHT: (C)2004,JPO&NCIPI