METHOD AND SYSTEM FOR PALLETIZING PEAT MOSS
A system for palletizing peat moss in bulk form, comprising a dosing and feeding unit; a filling and compaction unit, receiving an amount of peat moss determined by the dosing and feeding unit, and compressing each determined amount of peat moss into a compressed bloc of peat moss on a pallet; a stabilization unit, receiving, from the filling and compaction unit, pallets, each pallet supporting a compressed bloc of peat moss, and wrapping the compressed bloc for stabilization thereof; a weighing and height measuring unit, measuring each compressed bloc received from the stabilization unit; and a wrapping unit, finally wrapping each measured compressed bloc.
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This application claims benefit, under 35 U.S.C. §119(e), of U.S. provisional application Ser. No. 61/555,715, filed on Nov. 4, 2011. All documents above are incorporated herein in their entirety by reference.
FIELD OF THE INVENTIONThe present invention relates to improvements in the field of peat moss bulk shipping. More particularly, the invention pertains to a method and apparatus for palletizing peat moss in bulk compressed form.
SUMMARY OF THE INVENTIONMore specifically, in accordance with the present invention, there is provided a system for palletizing peat moss in bulk form, comprising a dosing and feeding unit; a filling and compaction unit, receiving an amount of peat moss determined by the dosing and feeding unit, and compressing each determined amount of peat moss into a compressed bloc of peat moss on a pallet; a stabilization unit, receiving, from the filling and compaction unit, pallets, each pallet supporting a compressed bloc of peat moss, and wrapping the compressed bloc for stabilization thereof; a weighing and height measuring unit, measuring each compressed bloc received from the stabilization unit; and a wrapping unit, finally wrapping each measured compressed bloc.
There is further provided a method for palletizing peat moss in bulk form, comprising a) determining an amount of peat moss corresponding to a target bloc; b) feeding the determined amount to a compaction box and compacting into a compacted bloc supported by a pallet; c) stabilizing the compacted bloc; d) measuring the compacted bloc; and e) wrapping the pallet with the compacted bloc thereon.
Other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of specific embodiments thereof, given by way of example only with reference to the accompanying drawings.
In the appended drawings:
As illustrated for example in
The illustrated dosing and feeding unit 12 comprises two feeding lines (I) and (II), each line comprising a doser 30 (
The doser 30 is essentially a supply of peat moss, fed with peat moss from the back. As illustrated in
As best seen in
The doser 30 thus determines the amount of material to be fed into the compaction box 40 of the filling and compaction unit 14 for a specific bloc.
As people in the art will appreciate, in the present system, the volumes are determined upstream of the filling and compaction unit 14. Moreover, by providing two feeding lines (I) and (II), as best seen in
The amount of peat moss determined by the doser 30 is dumped from the front end of the doser 30 into the compaction box 40 of the filling and compaction unit 14, positioned below the dosing and feeding unit 12 in
As shown in
As shown in
As shown in
The filling and compaction unit 14 comprises a piston and cylinder arrangement 15, supported by a frame 17 (best seen in
The compaction box 40 may be provided with vents (see for example
As shown in
At the stabilization unit 16, a top platen 311, best seen in
As shown in
From the stabilization unit 16, once stabilized as described hereinabove, the bloc is moved to a scale and a linear resistance at the weighing and height measuring unit 18, to have its height and weight measured. These pieces of data are processed in a PC with the weight of the reference volume as determined before by sampling at the dosing and feeding unit 12 as described hereinabove so as to confirm the volume of the bloc, and an identifying sticker is generated for that bloc. All those steps are completely automated. The identifying sticker typically indicates the time of production of the bloc, the kind (coarse/fine) of the product, the weight, the volume, the height of the bloc, the weight of the reference volume. The sticker is printed with a unique ITN # and is put it on the bloc itself. Simultaneously, quality tests may be performed on the bloc.
The wrapping station 20 is provided after the weighing and height measuring unit 18. In
At the output unit 22, an arrangement of conveyors moves the pallets away where a forklift takes the loads. All the movements on the conveyors are automated by a PLC and require no manpower.
Determination of a volume for a first bloc at the dosing and feeding unit 12 is done concurrently with compaction of a second bloc at the filling and compaction unit 14, stabilization of a third bloc at the stabilization unit 16, measuring of a fourth bloc at the weighing and height measuring unit 18, and wrapping of a fifth bloc at the wrapping unit 20.
Sphagnum peat moss optionally in admixture with mineral or organic aggregates, having a water-content ranging from about 25 to about 50 weight % and a density ranging from about 0.05 to about 0.15 gm/cc on dry basis, is used as feedstock. If the water-content is too low, i.e., less than 25 weight %, it may be adjusted by adding water by means of water sprays for example. If, on the other hand, the water-content of the peat moss is too high, i.e., higher than 50 weight %, the compactions modes need be adjusted to provide a desired density bloc.
As shown in
In step A, a volume of peat moss is automatically determined according to a target peat moss bloc. Sample amounts of peat moss are collected as a reference for calculating the volume in the bloc.
In step C, according to a first mode, typically for high quality peat moss, for example peat moss with a water-content ranging from about 25 to about 50 weight %, high fiber content, recently cropped etc. . . . , the peat moss is compressed once fed within the compaction box by a piston and cylinder arrangement. According to a second mode, the peat moss is twice compressed once fed within the compaction box. According to a third mode, typically in case of poorer quality peat moss or for providing higher quality blocs for example, a first portion of the amount determined by the doser, for example 60%, is first fed within the compaction box, first compressed, then the remaining portion of the amount determined by the doser, for example 40% is fed within the compaction box and compressed on top of the first amount.
The compaction time in step C, between 2 and 30 s, is reduced by about half, compared to conventional methods, by provision of the stabilizing step D.
The present method allows forming up to 32 palletized blocs per hour, i.e. a cycle time between about 2 and 3 minutes.
The obtained palletized peat moss comprises a body of compressed peat moss upstanding from a pallet and wrapped with a plastic film, the plastic film retaining the peat moss in compressed form on the pallet. Typically, the palletized peat moss has a rectangular cross-section with a width of about 1.0 meter and a length of 1.2 meters, the height ranging from about 2.0 to about 2.5 meters. The volume of compressed peat moss retained on the pallet generally ranges from about 6 cubic meters.
Although the present invention has been described hereinabove by way of embodiments thereof, it may be modified, without departing from the nature and teachings of the subject invention as recited hereinbelow.
Claims
1. A system for palletizing peat moss in bulk form, comprising:
- a dosing and feeding unit;
- a filling and compaction unit, receiving an amount of peat moss determined by said dosing and feeding unit, and compressing each determined amount of peat moss into a compressed bloc of peat moss on a pallet;
- a stabilization unit, receiving, from said filling and compaction unit, pallets, each pallet supporting a compressed bloc of peat moss, and wrapping the compressed bloc for stabilization thereof;
- a weighing and height measuring unit, measuring each compressed bloc received from said stabilization unit; and
- a wrapping unit, finally wrapping each measured compressed bloc.
2. The system of claim 1, wherein said dosing and feeding unit comprises at least one feeding line, each line comprising a doser.
3. The system of claim 1, wherein said dosing and feeding unit comprises a conveyor feeding peat moss and an equalizer automatically selecting amounts of peat moss to be conveyed to said filling and compaction unit.
4. The system of claim 1, wherein said dosing and feeding unit comprises a conveyor feeding peat moss, an equalizer automatically selecting amounts of peat moss to be conveyed to said filling and compaction unit, and a sampler collecting reference samples.
5. The system of claim 1, wherein said filling and compaction unit comprises a compaction box, said compaction box comprising a top part and a bottom part, said bottom part being mobile and adapted to move away from the top part after compression of the determined amount of peat moss into a compressed bloc to deliver a pallet supporting the compressed bloc of peat moss from said filling and compaction unit to said stabilization unit and return to said filling and compaction unit and reunite with said top part for compression of a next determined amount of peat moss.
6. The system of claim 5, wherein said top and bottom parts are sealed together by a mobile flange during compaction, said mobile flange being adapted to disengage the two parts to allow the bottom part to move away from the top part.
7. The system of claim 1, wherein said filling and compaction unit comprises a pallet manipulator feeding the filling and compaction unit with pallets for receiving loads of peat moss as determined by said dosing and feeding unit.
8. The system of claim 5, wherein said filling and compaction unit comprises a pallet manipulator positioned at the back of the compaction box, said pallet manipulator depositing one pallet at a time at the back of the compaction box, and, when the bottom part is ready to receive a load of peat moss as determined by said dosing and feeding unit, letting the pallet slide inside the bottom part for receiving the determined amount of peat moss.
9. The system of claim 1, wherein said filling and compaction unit comprises a piston and cylinder arrangement controlling a compaction ratio and a height of the compressed bloc of peat moss.
10. The system of claim 5, wherein said compaction box comprises tapered bores on walls thereof as air vents.
11. The system of claim 5, wherein said compaction box comprises inner round corners.
12. The system of claim 1, wherein said stabilization unit comprises a stationary rotary arm stretch wrapper.
13. The system of claim 1, wherein said stabilization unit comprises a top platen, adapted to move to contact the top surface of the bloc upon arrival from the filling and compaction unit.
14. The system of claim 1, wherein said weighing and height measuring unit comprises a scale and a linear resistance.
15. The system of claim 1, wherein said wrapping unit comprises a turn table.
16. A method for palletizing peat moss in bulk form, comprising:
- a) determining an amount of peat moss corresponding to a target bloc;
- b) feeding the determined amount to a compaction box and compacting into a compacted bloc supported by a pallet;
- c) stabilizing the compacted bloc;
- d) measuring the compacted bloc; and
- e) wrapping the pallet with the compacted bloc thereon.
17. The method of claim 16, wherein said step a) comprises automatically determining a volume of peat moss according to a target peat moss bloc.
18. The method of claim 16, wherein said step a) comprises automatically determining a volume of peat moss according to a target peat moss bloc and collecting a sample amount of peat moss as a reference for calculating a volume in a bloc in said step d).
19. The method of claim 16, wherein said step b) comprises feeding the amount of peat moss determined in step a) in the compaction box, compressing the peat moss on a pellet inserted in the compaction box, and conveying the compacted bloc on the pallet to a stabilization unit.
20. The method of claim 16, wherein said step b) comprises feeding the determined amount of peat moss compressing the determined amount of peat moss once.
21. The method of claim 16, wherein said step b) feeding a first portion of the determined amount of peat moss, compressing the first amount, feeding a remaining portion of the determined amount of peat moss, and compressing.
22. The method of claim 16, wherein said step b) comprises feeding the determined amount of peat moss compressing the determined amount of peat moss twice.
23. The method of claim 16, wherein said step b) comprises inserting one pallet at a time in the compaction box for receiving a next load of peat moss.
24. The method of claim 16, wherein said step c) comprises wrapping a first layer of film about the compressed bloc.
25. The method of claim 16, wherein said step d) comprises measuring the height and the weight of the compacted bloc.
Type: Application
Filed: Nov 5, 2012
Publication Date: May 9, 2013
Applicant: LES TOURBIERES BERGER LTEE. (SAINT-MODESTE)
Inventor: LES TOURBIERES BERGER LTEE. (SAINT-MODESTE)
Application Number: 13/668,588
International Classification: B65B 1/24 (20060101);