Sprue capable of being quickly separated from plastic fluid

The utility model discloses a sprue capable of being quickly separated from plastic fluid. A nozzle channel for the plastic fluid to flow and pass through is formed in the sprue; an injection port is formed in the tail end of the nozzle channel, and an arc-shaped groove is formed in one end, far away from the injection port, of the nozzle channel; a through hole communicated with the nozzle channel is formed in the bottom of the arc-shaped groove; a rapid separation slotted hole located between the arc-shaped groove and the nozzle channel is also formed in the sprue bushing, and the rapid separation slotted hole is communicated with the nozzle channel and the arc-shaped groove at the same time; the quick separation slotted hole comprises a diameter round hole close to the arc-shaped groove and a horn hole close to the nozzle channel, and the diameter round hole is communicated with the horn hole. During production, the sprue can be conveniently and quickly separated from plastic fluid of a nozzle of an inject