Annealing method, annealing jig and annealing apparatus
AssigneeSharp Kabushiki Kaisha
InventorsKenji Hirano, Hiroyuki Hanato, Takahiro Nakahashi
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Abstract
An annealing method according to the present invention is an annealing method of annealing a molded body (1) which is molded from a molding material in a molding step, and the method includes the steps of: (I) releasing stress from the molded body (1) by heating the molded body (1); and (II) correcting a warp of the molded body (1), by simultaneously heating the molded body (1) and applying a load to the molded body (1). This achieves an annealing method which makes it possible to obtain a molded body that is free from residual stress and distortion.
Claims8
A molding and annealing method comprising:
- in a molding step preparing a molded body by heating a molding material to a temperature;
- (I) releasing stress from the molded body by heating the molded body;
- and
- (II) correcting a warp of the molded body, by simultaneously heating the molded body and applying a load to the molded body,
- wherein in the step (II), while a temperature of the molded body is in a range from (a) a temperature lower by 20 K than a glass transition point of the molded material having undergone the step (I) to (b) a temperature higher by 20 K than the glass transition point, a difference in temperature between an upper surface of the molded body and a lower surface of the molded body is reduced to not more than 0.2 K, and
- wherein in the step (I), the molded body is heated to a temperature higher than a highest temperature in the molding step.
Dependencies are inferred from the claim text.