CA2071932C - Pulp slab stacker - Google Patents
Pulp slab stackerInfo
- Publication number
- CA2071932C CA2071932C CA 2071932 CA2071932A CA2071932C CA 2071932 C CA2071932 C CA 2071932C CA 2071932 CA2071932 CA 2071932 CA 2071932 A CA2071932 A CA 2071932A CA 2071932 C CA2071932 C CA 2071932C
- Authority
- CA
- Canada
- Prior art keywords
- stack
- slabs
- slab
- conveying
- transfer station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004806 packaging method and process Methods 0.000 claims abstract description 26
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- Stacking Of Articles And Auxiliary Devices (AREA)
- Pile Receivers (AREA)
Abstract
ABSTRACT OF DISCLOSURE
A method of restacking pulp slabs from a slab press allows smaller stacks to be conveyed on to a bale press without reducing the production rate of the slab press.
A first stack having a predetermined number of slabs is conveyed to a transfer station, a top slab from the first stack is clamped and raised and the first stack with the remaining slabs is conveyed on for further pressing and packaging, a second stack of slabs is conveyed to the transfer station, the top slab from the first stack is lowered onto the second stack and then the top slab from the first stack and the top slab from the second stack are raised together, the second stack with the remaining slabs are conveyed on for further pressing and packaging, and then the top slab from the first stack and the top slab from the second stack are lowered to form a third stack which is conveyed on for further pressing and packaging.
A method of restacking pulp slabs from a slab press allows smaller stacks to be conveyed on to a bale press without reducing the production rate of the slab press.
A first stack having a predetermined number of slabs is conveyed to a transfer station, a top slab from the first stack is clamped and raised and the first stack with the remaining slabs is conveyed on for further pressing and packaging, a second stack of slabs is conveyed to the transfer station, the top slab from the first stack is lowered onto the second stack and then the top slab from the first stack and the top slab from the second stack are raised together, the second stack with the remaining slabs are conveyed on for further pressing and packaging, and then the top slab from the first stack and the top slab from the second stack are lowered to form a third stack which is conveyed on for further pressing and packaging.
Description
- 2~71~32 PULP SL~B S~ACK~R
: : .: --The present invention relates to the production of pulp slabs and more specifically to an improved arrangement for reducing the number of pulp slabs in a bale without reducing the overall production rate of ~;
pulp.
- : ~. :.. . .
In a pulp mill, fluffed, flash dried pulp i~
compressed into slabs in a slab press. Several slabs are -;-lO compressed one on top of another and then discharged in a ::
stack of slabs which are further compressed and then ~-packaged to form a bale for shipment. A stack of slabs, ;~
generally at least three slabs, is discharged from a ~lab press and deposited onto a conveyor. The stack of three 15 ~labs is then conveyed to a bale press, which compresses --~
all three slabs in the stack together to form a bale.
The bale i8 then packaged for ~hipment. - - ~
A typical slab from a slab press weighs ~ -approximately 250 kilograms and i~ 600 mm by 800 mm with 20 varying heights. The cycle time to make an individual -~
~lab in a slab press results in a low production rate, therefore the slab press forms as many large slabs as possible, one on top of the other, before discharging because the step of discharging a stack of slabs onto a conveyor causes a delay in the production of slabs. For this reason, three or even four slabs are produced in one cycle in order to maximize the production rate. ~owever, when a stack of three or four slabs are placed on a conveyor the height of the stack is often greater than is desired for packaging into a bale, or greater than required by customers, and therefore it is necessary to -~
remove one or more slabs from the top of the stack and combine the removed slabs with other slabs so that stack~
~ :.'', 2~71932 ~ ~
of slabs passing to a bale press have fewer slabs than ;~
the stack of slabs exiting from the sla~ press.
Whereas one could produce less slabs in a stack leaving a slab press, this would decrease the production ..
rate of slabs and can cause a bottleneck in the production of pulp. For instance, if on.e was to produce ...
only two slabs of identical height instead of three slabs of the same height per stack from a slab press, then the .
time to discharge a stack with only two slabs results in .~
10 a production rate 1QSS as high as 20%. . . .-It is an aim of the present invention to provide a method wherein a stack of slabs being conveyed on a ~`.;
conveyor to a bale press may have at least one slab ;~
removed from the top of the stack and then combined with one or more slabs from further stacks so that the stack of slabs entering the bale press has fewer slabs than the stack of slabs exit,ng from the slab press.
It i5 a further aim of the present invention to .. -~
provide equipment to lift at least one slab from a stack ..
20 of slabs and hold that slab while the reduced slab stack .
is further conveyed to a bale press, and then when .
another stack of slabs is conveyed from the slab press, to lower the held slab onto the top of the new stack of ~.
slabs and lift at least two slabs together from the second stack. The two slabs being held are then lowered onto the conveyor so that the stacks conveyed to the bale press all have only two slabs. .~
The present invention provides in a process for ...
packaging pulp slabs into bales wherein pulp slabs are ..
30 formed in a slab press and leave the press stacked a .
predetermined number of slabs high, the improvement of providing a bale containing fewer slabs than the number of slabs in a stack leaving the slab pxes8, comprising --:.
.
-` 2 ~ 7 1 ~ 3 2 the steps of: conveying a first stack having a .
predetermined number of slabs to a transfer station, clamping and lifting at least one slab from the top of ..
the first stack at the transfer station, conveying the .
5 flrst stack with the remaining slabs for further pressing .-~
and packaging into a bale, conveying a s;econd stack having the predetermined number of slabs to the transfer station, lowering the at least one slab from the top of the first stack onto the top of the second stack at the ....
transfer station, clamping and lifting the at least one slab from the top of the first stack with at least one ~.. ~.. -slab from the top of the second stack, conveying the . . :
second stack with the remaining slabs for further pressing and packaging into a bale, lowering the at lea~t .:
15 one slab from the top of the first stack, and the at i~
least one slab from the top of the second stack together ` `
onto the transfer s~ation to form a third stack, and - -conveying the third stack for further pressing and packaging into a bale. ~ .
In a further embodiment there is provided in an ;
apparatus for packaging pulp slabs into bales including a .. `.
slab press that delivers a stack having a predetermined number of slab~, the improvement of an apparatus for ~.
providing a stack containing fewer slabs then the stack 25 having a predetermined number of slabs delivered from the ~.
~lab press, comprising: conveying means for conveying stacks of bales from the slab press, transfer station on the conveying means, clamping and lifting means at the transfer station for clamping and lifting at least one - -30 slab from a top of a stack, control means for conveying a -~
first stack having a predetermined number of slabs on the ~::
conveying means to the transfer station, clamping and lifting at least one slab from the top of the first stack with the clamping and lifting means, conveying the first stack with the remaining slabs on the conveying means for further processing into a bale, conveying a second stack ;~.`
~ ., -.
2 ~ 3 2 ~ :
: : .: --The present invention relates to the production of pulp slabs and more specifically to an improved arrangement for reducing the number of pulp slabs in a bale without reducing the overall production rate of ~;
pulp.
- : ~. :.. . .
In a pulp mill, fluffed, flash dried pulp i~
compressed into slabs in a slab press. Several slabs are -;-lO compressed one on top of another and then discharged in a ::
stack of slabs which are further compressed and then ~-packaged to form a bale for shipment. A stack of slabs, ;~
generally at least three slabs, is discharged from a ~lab press and deposited onto a conveyor. The stack of three 15 ~labs is then conveyed to a bale press, which compresses --~
all three slabs in the stack together to form a bale.
The bale i8 then packaged for ~hipment. - - ~
A typical slab from a slab press weighs ~ -approximately 250 kilograms and i~ 600 mm by 800 mm with 20 varying heights. The cycle time to make an individual -~
~lab in a slab press results in a low production rate, therefore the slab press forms as many large slabs as possible, one on top of the other, before discharging because the step of discharging a stack of slabs onto a conveyor causes a delay in the production of slabs. For this reason, three or even four slabs are produced in one cycle in order to maximize the production rate. ~owever, when a stack of three or four slabs are placed on a conveyor the height of the stack is often greater than is desired for packaging into a bale, or greater than required by customers, and therefore it is necessary to -~
remove one or more slabs from the top of the stack and combine the removed slabs with other slabs so that stack~
~ :.'', 2~71932 ~ ~
of slabs passing to a bale press have fewer slabs than ;~
the stack of slabs exiting from the sla~ press.
Whereas one could produce less slabs in a stack leaving a slab press, this would decrease the production ..
rate of slabs and can cause a bottleneck in the production of pulp. For instance, if on.e was to produce ...
only two slabs of identical height instead of three slabs of the same height per stack from a slab press, then the .
time to discharge a stack with only two slabs results in .~
10 a production rate 1QSS as high as 20%. . . .-It is an aim of the present invention to provide a method wherein a stack of slabs being conveyed on a ~`.;
conveyor to a bale press may have at least one slab ;~
removed from the top of the stack and then combined with one or more slabs from further stacks so that the stack of slabs entering the bale press has fewer slabs than the stack of slabs exit,ng from the slab press.
It i5 a further aim of the present invention to .. -~
provide equipment to lift at least one slab from a stack ..
20 of slabs and hold that slab while the reduced slab stack .
is further conveyed to a bale press, and then when .
another stack of slabs is conveyed from the slab press, to lower the held slab onto the top of the new stack of ~.
slabs and lift at least two slabs together from the second stack. The two slabs being held are then lowered onto the conveyor so that the stacks conveyed to the bale press all have only two slabs. .~
The present invention provides in a process for ...
packaging pulp slabs into bales wherein pulp slabs are ..
30 formed in a slab press and leave the press stacked a .
predetermined number of slabs high, the improvement of providing a bale containing fewer slabs than the number of slabs in a stack leaving the slab pxes8, comprising --:.
.
-` 2 ~ 7 1 ~ 3 2 the steps of: conveying a first stack having a .
predetermined number of slabs to a transfer station, clamping and lifting at least one slab from the top of ..
the first stack at the transfer station, conveying the .
5 flrst stack with the remaining slabs for further pressing .-~
and packaging into a bale, conveying a s;econd stack having the predetermined number of slabs to the transfer station, lowering the at least one slab from the top of the first stack onto the top of the second stack at the ....
transfer station, clamping and lifting the at least one slab from the top of the first stack with at least one ~.. ~.. -slab from the top of the second stack, conveying the . . :
second stack with the remaining slabs for further pressing and packaging into a bale, lowering the at lea~t .:
15 one slab from the top of the first stack, and the at i~
least one slab from the top of the second stack together ` `
onto the transfer s~ation to form a third stack, and - -conveying the third stack for further pressing and packaging into a bale. ~ .
In a further embodiment there is provided in an ;
apparatus for packaging pulp slabs into bales including a .. `.
slab press that delivers a stack having a predetermined number of slab~, the improvement of an apparatus for ~.
providing a stack containing fewer slabs then the stack 25 having a predetermined number of slabs delivered from the ~.
~lab press, comprising: conveying means for conveying stacks of bales from the slab press, transfer station on the conveying means, clamping and lifting means at the transfer station for clamping and lifting at least one - -30 slab from a top of a stack, control means for conveying a -~
first stack having a predetermined number of slabs on the ~::
conveying means to the transfer station, clamping and lifting at least one slab from the top of the first stack with the clamping and lifting means, conveying the first stack with the remaining slabs on the conveying means for further processing into a bale, conveying a second stack ;~.`
~ ., -.
2 ~ 3 2 ~ :
having the predetermined number of slabs on the conveying means to the transfer station, lowering the at least one slab from the top of the first stack onto the top of the second stack with the clamping and lifting means, clamping and lifting the at least one slab from the top of the first stack with at least one slab from the top of the second stack with the clamping and lifting means, conveying the second stack with the remaining slabs on the conveying means for further processing into a bale, lowering the at least one slab from the top of the first stack and the at least one slab from the top of the second stack together onto the conveying means at the transfer station with the clamping and lifting means to form a third stack, and conveying the third stack on the 15 conveying means for further processing into a bale. ~ ~
:,,, ~',:.: .' In drawings which illustrate embodiments of the invention, Figure 1 is a schematic layout view showing one embodiment of a pulp slab stacker according to the -present invention.
Figure 2 i8 a sectional view taken at line 2-2 of Figure 1.
. : , Referring now to the drawings, a slab press 10 is ~ ;
shown in Figure 1 which has a top ram ~2 and a bottom ram 14. The rams are operated by hydraulic cylinders (not shown). Three slabs 16 are shown stacked in the slab `~
press 10 and the bottom ram 14 is positioned in line with a conveyor 18 for conveying a stack of slabs 16. Each ~-slab 16 is ~ormed in the slab press, flash dried pulp is fed into the press mold which, when full is then compressed between the top ram 12 and the bottom ram 14.
When the first slab 16 is formed, the rams 12,14 are opened, the press mold is filled again with pulp and a '~' ~-' , ;,. . ~ ~ . . . : . :
,. . ~ . .. . . ~
~: .
`` 2071932 ~
:,,, ~',:.: .' In drawings which illustrate embodiments of the invention, Figure 1 is a schematic layout view showing one embodiment of a pulp slab stacker according to the -present invention.
Figure 2 i8 a sectional view taken at line 2-2 of Figure 1.
. : , Referring now to the drawings, a slab press 10 is ~ ;
shown in Figure 1 which has a top ram ~2 and a bottom ram 14. The rams are operated by hydraulic cylinders (not shown). Three slabs 16 are shown stacked in the slab `~
press 10 and the bottom ram 14 is positioned in line with a conveyor 18 for conveying a stack of slabs 16. Each ~-slab 16 is ~ormed in the slab press, flash dried pulp is fed into the press mold which, when full is then compressed between the top ram 12 and the bottom ram 14.
When the first slab 16 is formed, the rams 12,14 are opened, the press mold is filled again with pulp and a '~' ~-' , ;,. . ~ ~ . . . : . :
,. . ~ . .. . . ~
~: .
`` 2071932 ~
- 5 ~
second slab formed on top of the first slab. The third ,'"~, -',' slab is formed on top of the first two e;labs. When the ''~' stack of three bales 16 is lowered on the bottom ram 14 , ''-' to its full extent, the top bale 16 is below the bottom "'~
edge of the press mold 10 and a transfer plunger from cylinder 20 shown on the left of the lowest slab 16 -'-,",,'' ..; . ~ ......
pushes the stack of bales 16 onto the conveyor ~8. ,;~
A transfer station 22 or stacker station is shown on the conveyor 18 and has a forklift mast 24 comprising two 10 uprights in which a carriage moves up and down. As shown '''~
in Figure 2, the carriage 26 has two side clamps 28 with -"'','' mechanical or hydraulic mechanisms for opening horizontally and then closing in order to grip a slab 16.
When a three slab stack reaches the transfer station 22, the conveyor 18 stops the stack. A removable stop 32 ~ ';
is shown adjacent the conveyor 18 to ensure the stacks always stop at the same position. The removable stop 32 '~
folds down when the stack i~ conveyed away on the '~
conveyor 18. The carriage 26 with the clamps 28 open is 20 lowered, the clamps are closed to clamp the top slab 16 '~
and the carriage 26 raises the top slab 16 above the ' stack. The two slab stack at the transfer station 22 then proceeds on the conveyor 18 and passes into a bale ' ''~
press 30 for further compression into a bale after which the bale is packaged for shipment.
In operation a three slab stack moves from the slah press 10 to the transfer station 22. The side clamps 28 pick up the top slab 16 and raise it above the existing ~tack. The removable stop 32 is lowered after the top ,'.,' , 30 slab has been raised and the two slab stack then ~ ~-continues on the conveyor 18 to the bale press 30.
The next three slab stack from the slab press 10 then,enter~ the transfer station 22 and is positioned by -`- 2~71932 ;~
the removable stop 32. The carriage 26 moves down on the uprights so that the slab 16 from the first stack is ~? lowered and positioned on the second stack, making the `-~
;~ second stack a total of four slabs high. The side clamps 5 28 move apart, releasing the slab, and 'the carriage 26 ~?, then moves ~urther down, the clamps 28 then move together to clamp the second slab which is the top lab of the 7 second stack entering the transfer station 22. ~he carriage 26 then lifts the top two slabs, the removable : 10 stop 32 is lowered and the conveyor 18 moves the two slab ~ stack away from the transfer station 22 and towards the ~:
? bale press 30. The carriage 26 then lowers the two slabs Z held by the clamps 28 down onto the conveyor 18, the clamps 28 are released and the carriage 26 moves upwards 15 leaving a two slab stack at the transfer station 22. The conveyor 18 then moves the two slab stack towards the bale press.
This process continues for three slab stacks coming : ~ :~
from the slab press so that only two slab stacks enter 20 the bale press.
Whereas three slab stacks are shown and described : ::
herein, it will be apparent that in certain instances :. .
four slab stacks may be produced by a slab press in which . :
case two slabs could be picked off each stack by the clamps 28 and the carriage 26. In another embodiment four slab stacks may be transferred on the conveyor and ; :::~
one slab may be picked from each stack assembling them :~
together so that three slab stacks continue to the bale press. .
~: ., -.
By utilizing the stacker arrangement of the present invention, one is able to produce the maximum number of - ;~
slabs in the slab press before lowering the bottom ram 14 ;~
and pushing the stack of slabs from the slab press onto :~
the conveyor lB. The larger the slabs that can be made .~ ::
207~32 - 7 ~
, ' .' ." '~:
in the press before having to lower the ram 14 to its lowest position, then the higher the production rate of the slab press. In general, the size of slabs that can be produced on the slab press are dependent upon the ~-space left betwe~n the top of the conveyor 18 and the underside of the slab press mold 10.
The operation of the conveyor hydraulic clamps 28 ;
and carriage 26 are preferably by computer. Limit switches are provided to position the carriage and the clamps. Thus, if there is a change in the size of the slabs or the number of the slabs, this can be done by simply rearranging the position of the limit switches.
The timing of the conveyor movement i5 also controlled to ensure that when a stack is conveyed to the bale pre~ 30 the previou~ stack hae left the bale press and has proceeded to the packaging stage. ~he operation of the carriage 26 and the clamps 28 are pr~ferably hydraulic cylinders consistent with the operation of similar equipment in the slab press and bale press line.
Various changes may be made to the embodiments shown herein without departing from the scope of the present invention which iB limited only by the following claims.
-~
' ' . ~'.'`, ,"
'`'`'''',~ '' ~-
second slab formed on top of the first slab. The third ,'"~, -',' slab is formed on top of the first two e;labs. When the ''~' stack of three bales 16 is lowered on the bottom ram 14 , ''-' to its full extent, the top bale 16 is below the bottom "'~
edge of the press mold 10 and a transfer plunger from cylinder 20 shown on the left of the lowest slab 16 -'-,",,'' ..; . ~ ......
pushes the stack of bales 16 onto the conveyor ~8. ,;~
A transfer station 22 or stacker station is shown on the conveyor 18 and has a forklift mast 24 comprising two 10 uprights in which a carriage moves up and down. As shown '''~
in Figure 2, the carriage 26 has two side clamps 28 with -"'','' mechanical or hydraulic mechanisms for opening horizontally and then closing in order to grip a slab 16.
When a three slab stack reaches the transfer station 22, the conveyor 18 stops the stack. A removable stop 32 ~ ';
is shown adjacent the conveyor 18 to ensure the stacks always stop at the same position. The removable stop 32 '~
folds down when the stack i~ conveyed away on the '~
conveyor 18. The carriage 26 with the clamps 28 open is 20 lowered, the clamps are closed to clamp the top slab 16 '~
and the carriage 26 raises the top slab 16 above the ' stack. The two slab stack at the transfer station 22 then proceeds on the conveyor 18 and passes into a bale ' ''~
press 30 for further compression into a bale after which the bale is packaged for shipment.
In operation a three slab stack moves from the slah press 10 to the transfer station 22. The side clamps 28 pick up the top slab 16 and raise it above the existing ~tack. The removable stop 32 is lowered after the top ,'.,' , 30 slab has been raised and the two slab stack then ~ ~-continues on the conveyor 18 to the bale press 30.
The next three slab stack from the slab press 10 then,enter~ the transfer station 22 and is positioned by -`- 2~71932 ;~
the removable stop 32. The carriage 26 moves down on the uprights so that the slab 16 from the first stack is ~? lowered and positioned on the second stack, making the `-~
;~ second stack a total of four slabs high. The side clamps 5 28 move apart, releasing the slab, and 'the carriage 26 ~?, then moves ~urther down, the clamps 28 then move together to clamp the second slab which is the top lab of the 7 second stack entering the transfer station 22. ~he carriage 26 then lifts the top two slabs, the removable : 10 stop 32 is lowered and the conveyor 18 moves the two slab ~ stack away from the transfer station 22 and towards the ~:
? bale press 30. The carriage 26 then lowers the two slabs Z held by the clamps 28 down onto the conveyor 18, the clamps 28 are released and the carriage 26 moves upwards 15 leaving a two slab stack at the transfer station 22. The conveyor 18 then moves the two slab stack towards the bale press.
This process continues for three slab stacks coming : ~ :~
from the slab press so that only two slab stacks enter 20 the bale press.
Whereas three slab stacks are shown and described : ::
herein, it will be apparent that in certain instances :. .
four slab stacks may be produced by a slab press in which . :
case two slabs could be picked off each stack by the clamps 28 and the carriage 26. In another embodiment four slab stacks may be transferred on the conveyor and ; :::~
one slab may be picked from each stack assembling them :~
together so that three slab stacks continue to the bale press. .
~: ., -.
By utilizing the stacker arrangement of the present invention, one is able to produce the maximum number of - ;~
slabs in the slab press before lowering the bottom ram 14 ;~
and pushing the stack of slabs from the slab press onto :~
the conveyor lB. The larger the slabs that can be made .~ ::
207~32 - 7 ~
, ' .' ." '~:
in the press before having to lower the ram 14 to its lowest position, then the higher the production rate of the slab press. In general, the size of slabs that can be produced on the slab press are dependent upon the ~-space left betwe~n the top of the conveyor 18 and the underside of the slab press mold 10.
The operation of the conveyor hydraulic clamps 28 ;
and carriage 26 are preferably by computer. Limit switches are provided to position the carriage and the clamps. Thus, if there is a change in the size of the slabs or the number of the slabs, this can be done by simply rearranging the position of the limit switches.
The timing of the conveyor movement i5 also controlled to ensure that when a stack is conveyed to the bale pre~ 30 the previou~ stack hae left the bale press and has proceeded to the packaging stage. ~he operation of the carriage 26 and the clamps 28 are pr~ferably hydraulic cylinders consistent with the operation of similar equipment in the slab press and bale press line.
Various changes may be made to the embodiments shown herein without departing from the scope of the present invention which iB limited only by the following claims.
-~
' ' . ~'.'`, ,"
'`'`'''',~ '' ~-
Claims (8)
1. In a process for packaging pulp slabs into bales wherein pulp slabs are formed in a slab press and leave the press stacked a predetermined number of slabs high, the improvement of providing a bale containing a number of slabs which is smaller than the predetermined number of slabs in a stack leaving the slab press, comprising the steps of:
conveying a first stack having the predetermined number of slabs to a transfer station;
lifting at least one slab from the top of the first stack at the transfer station so that the first stack has the said number of slabs, the said number being greater than zero;
conveying the first stack having the said number of slabs for further pressing and packaging into a bale;
conveying a second stack having the predetermined number of slabs to the transfer station;
lowering the at least one slab from the top of the first stack onto the top of the second stack at the transfer station;
lifting the at least one slab from the top of the first stack with at least one slab from the top of the second stack so that the second stack has the said number of slabs;
conveying the second stack having the said number of slabs for further pressing and packaging into a bale;
lowering the at least one slab from the top of the first stack, and the at least one slab from the top of the second stack together onto the transfer station to form a third stack, and conveying the third stack for further pressing and packaging into a bale.
conveying a first stack having the predetermined number of slabs to a transfer station;
lifting at least one slab from the top of the first stack at the transfer station so that the first stack has the said number of slabs, the said number being greater than zero;
conveying the first stack having the said number of slabs for further pressing and packaging into a bale;
conveying a second stack having the predetermined number of slabs to the transfer station;
lowering the at least one slab from the top of the first stack onto the top of the second stack at the transfer station;
lifting the at least one slab from the top of the first stack with at least one slab from the top of the second stack so that the second stack has the said number of slabs;
conveying the second stack having the said number of slabs for further pressing and packaging into a bale;
lowering the at least one slab from the top of the first stack, and the at least one slab from the top of the second stack together onto the transfer station to form a third stack, and conveying the third stack for further pressing and packaging into a bale.
2. The process for packaging pulp slabs according to claim 1 wherein the stacks are brought to a stop at the transfer station.
3. The process for packaging pulp slabs according to claim 1 wherein the lifting steps include clamping the slabs and the lowering steps include clamping the slabs.
4. In a process for packaging pulp slabs into bales wherein pulp slabs are formed in a slab press and leave the press in stacks three slabs high, the improvement of providing two slab stacks from three slab stacks comprising the steps of:
conveying a first stack having three slabs to stop at a transfer station;
lifting a top slab to leave the first stack having two slabs;
conveying the first stack having two slabs for further pressing and packaging into a two slab bale;
conveying a second stack having three slabs to stop at the transfer station;
lowering the top slab from the first stack onto the second stack;
lifting the top slab from the second stack together with the top slab from the first stack to leave the second stack having two slabs;
conveying the second stack having two slabs for further pressing and packaging into a two slab bale;
lowering the top slab from the second stack and the top slab from the first stack together onto the transfer station to form a third stack having two slabs, and conveying the third stack having two slabs for further pressing and packaging into a two slab bale.
conveying a first stack having three slabs to stop at a transfer station;
lifting a top slab to leave the first stack having two slabs;
conveying the first stack having two slabs for further pressing and packaging into a two slab bale;
conveying a second stack having three slabs to stop at the transfer station;
lowering the top slab from the first stack onto the second stack;
lifting the top slab from the second stack together with the top slab from the first stack to leave the second stack having two slabs;
conveying the second stack having two slabs for further pressing and packaging into a two slab bale;
lowering the top slab from the second stack and the top slab from the first stack together onto the transfer station to form a third stack having two slabs, and conveying the third stack having two slabs for further pressing and packaging into a two slab bale.
5. In an apparatus for packaging pulp slabs into bales including a slab press that delivers a stack having a predetermined number of slabs, the improvement of an apparatus for providing a stack containing a number of slabs, the number having less than the predetermined number of slabs delivered from the slab press, comprising:
means for conveying stacks of bales from the slab press;
a transfer station on the conveying means;
clamping and lifting means at the transfer station for clamping and lifting at least one slab from a top of a stack, and control means for conveying a first stack having a predetermined number of slabs on the conveying means to the transfer station, clamping and lifting at least one slab from the top of the first stack with the clamping and lifting means so that the first stack has the said number of slabs, conveying the first stack having the said number of slabs on the conveying means for further processing into a bale, conveying a second stack having the predetermined number of slabs on the conveying means to the transfer station, lowering the at least one slab from the top of the first stack onto the top of the second stack with the clamping and lifting means, clamping and lifting the at least one slab from the top of the first stack with at least one slab from the top of the second stack with the clamping and lifting means so that the second stack has the said number of slabs, conveying the second stack having the said number of slabs on the conveying means for further processing into a bale, lowering the at least one slab from the top of the first stack and the at least one slab from the top of the second stack together onto the conveying means at the transfer station with the clamping and lifting means to form a third stack, and conveying the third stack on the conveying means for further processing into a bale.
means for conveying stacks of bales from the slab press;
a transfer station on the conveying means;
clamping and lifting means at the transfer station for clamping and lifting at least one slab from a top of a stack, and control means for conveying a first stack having a predetermined number of slabs on the conveying means to the transfer station, clamping and lifting at least one slab from the top of the first stack with the clamping and lifting means so that the first stack has the said number of slabs, conveying the first stack having the said number of slabs on the conveying means for further processing into a bale, conveying a second stack having the predetermined number of slabs on the conveying means to the transfer station, lowering the at least one slab from the top of the first stack onto the top of the second stack with the clamping and lifting means, clamping and lifting the at least one slab from the top of the first stack with at least one slab from the top of the second stack with the clamping and lifting means so that the second stack has the said number of slabs, conveying the second stack having the said number of slabs on the conveying means for further processing into a bale, lowering the at least one slab from the top of the first stack and the at least one slab from the top of the second stack together onto the conveying means at the transfer station with the clamping and lifting means to form a third stack, and conveying the third stack on the conveying means for further processing into a bale.
6. The apparatus for packaging pulp slabs according to claim 5 including stack stop means at the transfer station for stopping each stack of slabs in the same position at the transfer station.
7. The apparatus for packaging pulp slabs according to claim 5 wherein the clamping and lifting means comprises side flanges adapted to move horizontally apart and together, the flanges being adapted to grip at least one slab and wherein the side flanges are supported by a carriage having raising and lowering means.
8. In a process for packaging pulp slabs into bales wherein the pulp slabs are formed in a slab press and leave the press stacked a predetermined number of slabs high, the improvement of providing a bale containing a number of slabs, the number being less than the predetermined number of slabs in a stack leaving the slab press, comprising the steps of:
conveying a first stack having the predetermined number of slabs to a transfer station;
lifting at least one slab from the top of the first stack at the transfer station so that the first stack has the said number of slabs, the said number being greater than zero;
conveying the first stack having the said number of slabs for further pressing and packaging into a bale;
conveying a second stack having the predetermined number of slabs to the transfer station;
lowering the at least one slab from the top of the first stack onto the top of the second stack at the transfer station;
lifting the at least one slab from the top of the first stack with the at least one slab from the top of the second stack, so that the second stack has the said number of slabs, and conveying the second stack having the said number of slabs for further pressing and packaging into a bale.
conveying a first stack having the predetermined number of slabs to a transfer station;
lifting at least one slab from the top of the first stack at the transfer station so that the first stack has the said number of slabs, the said number being greater than zero;
conveying the first stack having the said number of slabs for further pressing and packaging into a bale;
conveying a second stack having the predetermined number of slabs to the transfer station;
lowering the at least one slab from the top of the first stack onto the top of the second stack at the transfer station;
lifting the at least one slab from the top of the first stack with the at least one slab from the top of the second stack, so that the second stack has the said number of slabs, and conveying the second stack having the said number of slabs for further pressing and packaging into a bale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2071932 CA2071932C (en) | 1992-07-22 | 1992-07-22 | Pulp slab stacker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2071932 CA2071932C (en) | 1992-07-22 | 1992-07-22 | Pulp slab stacker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2071932A1 CA2071932A1 (en) | 1992-09-10 |
| CA2071932C true CA2071932C (en) | 1994-08-16 |
Family
ID=4150056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2071932 Expired - Fee Related CA2071932C (en) | 1992-07-22 | 1992-07-22 | Pulp slab stacker |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2071932C (en) |
-
1992
- 1992-07-22 CA CA 2071932 patent/CA2071932C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2071932A1 (en) | 1992-09-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |