| 摘要 |
PROBLEM TO BE SOLVED: To prevent problems such as occurrence of burned surface of a resin molding or occurrence of a fire or explosion in an annealing oven. SOLUTION: An annealing apparatus for receiving cast polyamide resin moldings in the annealing oven, and heating and annealing them, is constituted by using a safety device which is for monitoring the concentration of oxygen in the oven and stopping the heating when the concentration of oxygen becomes a prescribed concentration or higher, a safety device which is equipped with a nitrogen gas flowmeter for nitrogen gas sent into the oven and for stopping the heating when the flow of nitrogen measured by the nitrogen flowmeter becomes a prescribed value or below, and furthermore, a control device which is for keeping the heater surface temperature in the oven within a prescribed temperature range. COPYRIGHT: (C)2008,JPO&INPIT
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