A sealing cylinder for bottle blowing machine

Abstract

The invention discloses a bottle blowing machine seal cylinder comprising a cylinder barrel, a piston rod arranged in a cavity of the cylinder barrel in a slide manner, and a plug fixed on the bottom of the piston rod; the piston rod comprises a rod body with a hollow cavity, and a boss fixed in a radial direction of the rod body; a piston cavity used for limiting a boss route is fixed in the cylinder barrel cavity, wherein the boss drives the piston cavity into mutually isolated an upper chamber and a lower chamber; the seal cylinder also comprises a high pressure air inlet fixed on the top of the side wall of the cylinder barrel, an upper air port arranged on the cylinder barrel side wall and connected with the upper chamber, a lower air port arranged on the cylinder barrel side wall below the piston cavity and connected with the cylinder barrel cavity, and a connecting air port extending upwards from the center of the lower air port and connected with the piston cavity. The piston rod is also provided with a stop piece used for stopping on the lower air port when the piston rod slides down. The seal cylinder is compact in structure, can effectively alleviate plug sealing speed and noises, thus prolonging life of the plug and a die.

Description

technical field [0001] The invention relates to the technical field of bottle blowing, in particular to a sealing cylinder for a bottle blowing machine. Background technique [0002] When the blow molding machine blows the bottle, the piston rod in the sealing cylinder drives the head under the piston rod to move downward under the action of high-pressure gas. When the head is pressed down on the mold, the bottle mouth is sealed. At present, the traditional sealing cylinder structure such as attached figure 1 As shown, it includes the piston rod located in the cylinder of the sealing cylinder, the head connected to the lower end of the piston rod, the upper air port and the lower air port on the side wall of the cylinder, and the high-pressure air inlet. When moving, the upper air port intakes air and the lower air port exhausts, and the piston rod is uniformly accelerated and moves downward under the action of high-pressure air. When the head is sealed, the speed reaches t...

AI Technical Summary

Problems solved by technology

At present, the traditional sealing cylinder structure such as attached figure 1 As shown, it includes the piston rod set in the cylinder of the sealing cylinder, the head connected to the lower end of the piston rod, the upper air port and the lower air port on the side wall of the cylinder, and the high-pressure air inlet. When moving, the upper air port intakes air and the lower air port exhausts, and the piston rod accelerates downward evenly under the action of high-pressure air. When the head is sealed, the speed reaches the highest speed, and the impact force it receives is also the largest, thus making the sealing noise Larger, and because the head drops at the highest speed during sealing, it is easy to cause damage to the head and the mold, reducing its service life

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