Wexxar WF30T, Operation And Service Manual

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WF20T Case Former Installation
4-18
3) Case Injection:
The next step in the sequence is to move the case
UP
into the forming head jawplates.
The case injector pushes upwards on the bottom edge of the separated case to impale
the top edges of the corrugated case onto a series of sharp pins mounted on the inner
surfaces of the jawplates of the forming head assembly that penetrate into case
corrugation flutes. When the injector returns to the
DOWN
position, it leaves the case
securely held by these pins of the Pin and Dome mechanical gripping system developed
by WEXXAR.
4) Case Opening:
The case opening action now occurs, which opens the case 90
°
to the fully
OPEN
position while still held securely by the pins. WEXXAR does not use a vacuum system
on its case formers.
5) Minor Flap Folding:
After opening the case, the forming head moves it to the
DOWN
position. During this
descent, the case bottom’s minor (widthwise) flaps contact a pair of angled minor flap
folders, causing them to begin to fold inwards. As the descent continues to the bottom
position, the angled minor flap folders simultaneously move to a horizontal position,
completing the folding of the case’s minor flaps.
6) Major Flap Folding:
A pair of major flap folders receives the bottom major flaps into slots as the forming head
descends to the fully
DOWN
position. When the case is fully
DOWN
, the major flap
folders rotate to fold the case’s major flaps about half way, and secures the case from
vertical movement. The forming head now moves to the
UP
position, pulling the pins out
of the top edges of the flaps, and leaving the fully formed case ready to be sealed with
the bottom flaps folded.
7) Case Sealing and Discharge:
A discharge pusher moves the case horizontally out of the flap folders into the bottom
sealing section, clearing the forming section for the next case. Outfeed conveyors grip
the sides of the case to transport it over a tape head that applies tape to the bottom flaps
as the case moves towards the discharge end of the machine.
After the magazine has been loaded and the machine started, operation is fully automatic until
the magazine requires refilling. A remote demand sensor is provided to sense when the
downstream equipment has a sufficient number of cases; when this occurs, machine operation is
automatically halted until a need for more cases is signaled, causing an automatic restart.
NOTE: For the location and description of the major parts,
refer to Section 3.1: ‘Major Components’.