DE19926345C2 - Glass drip feeder for low cutting frequency - Google Patents

Description

The Present Invention, "Low Cut Glass Drip Feeder frequency ", is intended for the individualization of always falling glass items, the more difficult processing and therefore need more time, more leeway for glass processing create work without a high cutting frequency more normal Feeder types require oversized machine sizes.

The widespread state of the art is low cutting frequencies a rotating plunger with an external thread, which a creates a vertically upward flow, but in one relatively large distance to the drip hole and thus with a little influence on glass river containment. In addition, through Concentricity error of the Plun rotating in the high temperature range gers interfere with the drop formation.

Another prior art is US Pat. No. 1,642,904. Here will the negative pressure is generated in the right place, but with a steadily moving suction pad, which the Nach partly has that there is no absolute independence from time, because the suction pad is only available for a limited time, and au most of the drop mass from the just below Vacuum glass must be formed, which with Blisters may be present.

The present invention is intended to overcome these drawbacks. As with a normal feeder, a non-rotating plunger 3 is used, which produces high quality in terms of droplet consistency.

Referring to FIG. 1, the plunger 3 has a center bore in which z. B. a reciprocating piston 1 , which also carries a screw-like thread 8 in the lower region, which supports a promotion of the glass in the vertical direction un with rotation of the reciprocating piston, to a lifting movement of the reciprocating piston 1 relative to the plunger 1 , which causes the main promotion of the glass ,

This glass flow is noticeable at the lower end of the plunger in the immediate vicinity of the dropping point 7 by forcing a flow between the drip ring 6 and the plunger, which optimally prevents undesired glass leakage.

The center hole is expediently lined with a double-walled tube 2 , which can be used for cooling the plunger. The conveyed glass emerges from the overflow opening 5 into the space between the rotary tube 4 and the plunger 3 and, in a favorable side effect, also ensures a glass exchange in this space.

If you want to work without mechanical parts, you can press 2 gas bubbles 10 and 11 through holes 9 from the double-walled tube according to FIG. 2, which rise in the tube and thereby fill the tube cross-section completely and act as a piston during ascent and with a forced one Flow 12 displace the glass above it from the overflow opening 5 , but even dodge upwards (bubble 11 ) and step out of the surface. However, the ascending bubbles will increasingly lose their promotional effect on the way up, as they become slimmer and leave more and more glass on the walls. Therefore, the correct interval frequency for the bubble sequence must be found for each glass consistency, which guarantees sufficient flow.

Claims (2)

1. Glass drip feeder for low cutting frequency characterized in that in a center bore Plun ger ( 3 ) an upward flow of the liquid glass is generated by a screwed element ( 8 ), so that one at the lower end of the plunger in the drip ring ( 6 ) resulting flow prevents the glass from dripping through the drip opening, also by maintaining a permanent negative pressure. 2. Glass drip feeder according to claim 1, characterized in that the flow is generated by medium bubbles which are pressed through holes ( 9 ) into the glass mass and have a significant buoyancy in the glass, and thus rise like a piston in the center hole and thereby the glass flow cause.