| 摘要 |
PURPOSE:To obtain an inexpensive injection apparatus not causing the dripping of a liquid, by a method wherein two stages of control mechanisms pressing the elastomeric part of a nozzle are provided and the internal pressure of the nozzle is lowered when discharge is stopped to perform operation so as to draw content into the nozzle. CONSTITUTION:Pumps 3, 4 are started to send only a resin into a mixing tank 5 from a first tank 1 but also a main agent and a curing agent into said tank 5 from a second tank 2. In such a state that a first control mechanism 10 and a second control mechanism 14 are not operated, the content of the mixing tank 5 is discharged to the outside as it is through a discharge cylinder 6, an introducing cylinder 7 and a discharge cylinder 8. After a predetermined time, the first and second control mechanisms 10, 14 are almost simultaneously operated and movable pieces 12, 16 are pressed to the introducing cylinder 7 to close this part to stop discharge. When only the movable piece 16 is released from pressing, the internal pressure of a nozzle 9 becomes lower than the external pressure and the content present at the part of the discharge cylinder 8 is drawn in the nozzle and no dripping is caused.
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