| 摘要 |
PURPOSE:To make it possible to obtain an adequate coating amount constantly without depending on the experience or skill of a worker, by furnishing a coating amount measuring means and an injection flow control means to maintain a coating amount almost close to the standard coating amount. CONSTITUTION:A rotation speed control device 18 compares the computed injection flow and a standard injection flow set by a standard injection flow setting device 19 to compute the deflection to the standard flow. And the rotation speed of a motor 11 to make the deflection to zero depending on a specific formula is computed, and the rotation speed of the motor 11 is driven and controlled to be equal to the computed speed in the following coating work. As a result, in the coating work following to the correction, the coating is carried out at an optimum amount at the beginning, but the coating amount may vary as the time passes. However, since the variation of the coating amount in the period of 30 min level makes no serious practical probrem in this case, an adequate amount of the frit glass suspension 7 can be applied to each funnel 2 in the coating work in such a period.
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