Sheet-material associating – Associating and folding – Zigzag package
Patent
1989-05-08
1991-04-16
Kwon, John T.
Sheet-material associating
Associating and folding
Zigzag package
270 30, 19163, 493411, 493415, B65H 4510
Patent
active
050076230
DESCRIPTION:
BRIEF SUMMARY
A method for feeding the primary web of a mineral wool web by means of a pendulum conveyor onto a receiving conveyor and an arrangement of such a pendulum conveyor.
BACKGROUND OF THE INVENTION
The present invention relates to a method for feeding out the primary web of a mineral wool web by means of a pendulum conveyor and to an arrangement of such a pendulum conveyor.
When making mineral wool webs by using a pendulum conveyor for the output, the aim is to achieve a thin primary web, yielding a homogeneous end product. The primary web being thin, the output speed has to be high, 200 m/min or more, in order to obtain the desired capacity.
A thin primary web of mineral wool is very plastic, and to prevent its hovering out of control during output at a high rate, thus causing uneven edges, one tries to carry out the output as close to the receiving conveyor as possible, at least over a major part of its width. Thus, each layer of the primary web is allowed to lay down and adhere to the preceding layer before feeding the following layer on top. A problem always arising in this situation is that of the pendulum tending to sweep back the previously fed layer of the primary web during the reverse motion. This problem is increased by the fact that the end rollers, the conducting rollers of the pendulum conveyors, always rotate outwards for outputting the primary web. This means that the conducting roller preceding in the direction of motion rotates in the same direction as the pendulum motion, tending to lift the layer fed out during the previous pendulum swing, thus hampering the forming of even edges and a flat layer. The second conducting roller, i.e. the subsequent one in the direction of motion, rotates in a direction opposite to the pendulum motion, having however the same direction of rotation as the output motion of the primary web and tending to advance the depositing of the layer being fed out.
SUMMARY OF THE INVENTION
The purpose of the present invention is to reduce the negative consequences and to increase the positive consequences of the effect of conducting rollers on the fixing of the fed out layer to the underlying layer.
The pendulum conveyor has been made movable in a shears-like manner, the facing conveyors being displaced vertically with regard to each other for each pendulum swing, so that the pendulum conveyor preceding in the direction of motion is situated higher than the subsequent pendulum conveyor. Thus, the lower conducting roller of the preceding pendulum conveyor is situated further away from the receiving conveyor than the conducting roller of the subsequent pendulum conveyor. By this arrangement, the conducting roller rotating in the same direction as the pendulum and having tended to lift the layer fed out during the previous pendulum swing, is separated from the receiving conveyor and does not influence the underlying layer as easily. At the same time, the second, subsequent conducting roller, towards which the output of the primary web is directed, and which has the same direction of motion as the primary web, is situated closer to the receiving conveyor and advances the pressing and fixing of the web onto the receiving conveyor.
In this manner, a more rapid fixing of the fed out layers is achieved, and consequently also a better controlled loop or edge forming.
The reversing of the mutual height position of the pendulum conveyors preferably is synchronous with the pendulum motion, taking place when the conveyor is in either of the end positions.
The reversing is preferably done mechanically by connecting to the connecting rod that drives the pendulum conveyor. The reversing may also be hydraulically or pneumatically performed under the effect of an impulse from e.g. a limit switch valve.
The pendulum conveyors are preferably connected to each other and to a reversing mechanism which in the end positions of the pendulum motion, actuates the reversing of the height position of the two pendulum conveyors with regard to each other. The reversing mechanism may be a hydraulic o
REFERENCES:
patent: 2710992 (1955-06-01), Goldman
patent: 2962772 (1960-12-01), Draving
Nurmi Tom
Unkuri Matti
Kwon John T.
Newholm Therese M.
Oy Partek Ab
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