| BM AUTOMATIC ENVELOPING MACHINE MODEL BM 6R | |||||||||||
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| Machine description On principle the design of the machine is based on the well proven and patented BM-ELBAK technology. All important, moved parts of the machine are driven by one geared motor with adjustable speed. This guarantees that all movements are synchronised. Plate feeder and transition belt The transition belt is based on the patented standard belt used since many years not only in enveloping machines but also in stacking machines. To guarantee a perfect positioning of the plates for pick up, the transport chains are driven by two geared motors - one for the bottom chain, one for the lateral chains. This gives together with the double front-position control an absolute precise positioning of the first plate. The plate feeder's geometry has been optimised again; the run-off control is being controlled forcibly by a rocker cam. The maximum speed of one plate feeder is 100 cycles/minute. Feeding and transport of plates Plate stacks with a height of 80 - 120 mm are manually loaded into the feeding conveyor. The inserted stack will be brought manually between 2 lateral duplex-chains, which are fixed horizontally and of which the distance is adjustable. This lateral duplex chain is equipped with special drivers. In order to make the transport of the plates uniform, the stack of plates stands on 2 driven bottom chains, which are driven and controlled separately. With a patented double-front edge control system it is guaranteed that the first plate in the magazine is positioned exactly at the pick-up place. Plate feeder Above a deflector with 4 rubber suckers, which is driven through a gear and a crank drive, the first plate is taken off by vacuum, brought into horizontal position and laid down softly for further processing. A plate holder, which is holding the second plate in the stack during the removal procedure, prevents that the second plate will be taken too, even if the plates are very porous or slightly stick together. Unwinding device As a standard the machine is equipped with a motor driven, loop-controlled pay-off reel and designed for a 900mm separator roll. Optionally it is possible to equip the machine with an unwinder for 1.200mm rolls. Cutting device The machine is equipped with a rotating cutting and pre-notching device. Driven infeed rollers pull the separator from the loop outside the machine and feed it through the cutting rollers. One of the transport rollers is liftable mechanically for easy separator feeding. The cutting rollers are driven from the main drive and make one revolution per cycle. The speed of the infeed rollers is variable via a friction gear to adjust the requested separator length. Folding device The prepared separator, which is already cut and situated in the folding area, will be folded exactly in the middle by a folding sheet made of special steel. At the same time the plate, which is laid down by the plate feeder one, will be pushed into the envelope. The folding sheet is driven by a crank mechanism. Welding station After the folding process the separator with the plate is brought between the two pairs of rotating crimping wheels. The crimping wheels are working with a concentrated pressure at intermittent points at the peaks and valleys for the weld seam. During the transport of the enveloped plate the envelope is closed laterally. The finished product is thereby pushed between two drivers of a continuously running transport chain which brings the enveloped plate to the plate feeder II and the stacking area. Plate-Group-Production From the plate feeder II, which is identical with the first one, the complementary plate is laid down between two drivers of the transport chain. So a pair of plates is produced. Stacking of groups The above mentioned pairs of plates are stacked on an exit conveyor to the requested size. The kind of collection of the pairs of plates in this position and the lowering of the conveyor during the stacking operation guarantees not only a good stacking quality but also a proper feed of the end plate. For a proper stacking operation during the removal of the finished group, the incoming pairs of plates are positioned first on two withdrawable bars for pre-collection. The horizontal exit conveyor removes the groups from the stacking area towards take-off place. End-plate-feeder (Option) The end plate feeder, which is located above the stacking place, puts, (if an element with two none enveloped plates outside is required), one plate onto the conveyor before the first pair of plate arrives for the stacking opera-tion. Frame The frame, in and on which all assembly groups and the control equipment are mounted, has suction conduits as an integral part. The connection flanges are on the roof of the machine. The lead dust is exhausted at the place of appearance. The machine is closed in front with Plexiglas doors. They can be opened easily for adjusting purposes and clearing faults. Control The machine is controlled via a free programmable PLC from Siemens (SIMATIC S7) or from Allen Bradley. Different input keyboards are available. The switchboard cabinet is integrated in the machine. The adjustment for different groups sizes can be done quickly with a pre-selecting switch. The different stacking programs are selected with a switch FEATURES General
Exhausting system with one central connection nozzle, which is integrated completely in the machine frame. The machine is completely closed (glazing in front). With the above described design of the machine the compliance with the legal threshold limit value can be guaranteed. (usually 0,1 mg/m³).Plate handling With the patented BM-ELBAK vacuum plate feeding system a most careful plate handling is guaranteed.
If necessary, BM normally can provide trained service engineers european-wide within 24 to 48 hours.Machine design
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