Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
  • B26D7/0625—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by endless conveyors, e.g. belts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/01—Means for holding or positioning work
  • B26D7/018—Holding the work by suction
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/08—Means for treating work or cutting member to facilitate cutting
  • B26D7/088—Means for treating work or cutting member to facilitate cutting by cleaning or lubricating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/20—Cutting beds

Definitions

• the present invention relates to a suction cutting conveyor for an automatic machine for cutting sheet materials, in particular textile materials, using a vibrating blade penetrating into the cutting support.
• One field of application of the invention is that of the automatic cutting of stacks or mattresses of sheets of material, in particular of textile materials, using a vibrating blade penetrating into a suction cutting support.
• a vibrating blade cutting machine comprises in particular a cutting conveyor which serves to drive the stack of sheets during the cutting operation.
• This cutting conveyor is housed in a box inside which a strong depression is established in order to keep the sheets of material to be cut immobile during the cutting operation.
• the cutting conveyor also serves as a penetrating cutting support for the vibrating blade. It is indeed well known to make the cutting support penetrable by the blade so that during the cutting operation the blade can not only completely pass through the material to be cut, but also extend downwards beyond. the support surface and in the bed of material providing such a surface.
• the conveyor 1 generally comprises a plurality of cutting supports 2 which are each secured to a belt 3 of a drive conveyor.
• This conveyor also comprises at each end of the table a pinion 5 centered on a horizontal axis 4 and driving the belt 3 along rectilinear and curvilinear paths.
• each cutting support 2 comprises a plurality of bristles 6 mounted on a sole 7 forming several parallel rows of bristles, each bristle having a head forming the support for the sheet material to be cut. Passages made through the sole allow the suction air to pass.
• the pivoting of the cutting supports forces the material unloading combs 8 at the end of the cutting surface to be positioned at a height h above the cutting surface.
• this difference in height is detrimental for the user of the cutting machine because, on passing the cutting mat M, the material can be deformed by stretching and thus impact the pieces cut at this location or during loading of the mat ( opposite side to unloading), the material is stretched and then compressed during the depressurization phase thus creating stresses in this material which can degrade the quality of the cut parts.
• the material unloading combs 8 must be positioned offset from the vertical of the horizontal axes 4 for driving the pinions 5 of the conveyor in order to avoid the opening zone between the cutting supports creating a gap in head of hair where the material can rush in if the combs do not prevent them.
• This constraint requires having long combs subjected to vacuum and requiring them to be dimensioned as a function of these constraints.
• the useful cutting length may be reduced to avoid this area.
• the object of the invention is therefore to provide a cutting support which does not have the aforementioned drawbacks.
• This object is achieved by means of a suction cutting conveyor of an automatic blade cutting machine for sheet material, comprising a plurality of cutting supports integral with a drive mechanism driven along rectilinear and curvilinear paths, each cutting support comprising a plurality of bristles each having a foot integral with a sole and a head opposite the foot and on which is intended to rest a sheet material to be cut, in which, according to the invention, the sole of each cutting support is capable of being able to be elastically deformed by following the trajectories of the drive mechanism.
• the sole of the cutting supports has intrinsic characteristics giving it a property of deformation in the elastic range, that is to say a reversible deformation without creep by which the sole, as soon as the constraints are released, regains its original shape.
• the invention is remarkable in that the cutting supports each have a sole which has a degree of flexion in the transverse direction, which allows them to deform to follow the trajectories of the drive mechanism, in particular during the rotation of the conveyor at the upstream and downstream ends of the table to make a U-turn.
• the invention is also remarkable in that the plane of the driving mechanism of the cutting supports is situated in the plane of the sole of the cutting supports.
• the gap between the adjacent cutting supports is reduced, which makes it possible to further extend the cutting surface with the same conveyor dimension.
• each cutting support may have a plurality of parallel geometric shapes which extend in directions perpendicular to the direction of advance of the drive mechanism to allow it to deform elastically by following the paths of the drive mechanism. These shapes allow the sole to be flexible while keeping the bristles perpendicular to the tangency of this sole even during the period of operation.
• the geometric shapes of the sole of the cutting supports can be formed by a plurality of parallel slots.
• the crenellations of the sole may include external crenellations projecting outwardly from an external surface of the sole and / or internal crenellations projecting inwardly from an internal surface of the sole.
• the crenellations of the sole can comprise an alternation of external crenellations and internal crenellations so as to give an accordion shape.
• the crenellations can have a rectangular, square or rounded section.
• each cutting support may be made of plastic, this material having to be compatible with the deformations induced during operation.
• the cutting supports can each be mounted by their respective sole on a transmission member of the drive mechanism by means of at least one fixing slat.
• each cutting support can be mounted on the transmission member of the drive mechanism by means of at least two fixing slats spaced longitudinally from one another. At least one of the two fixing slats can cooperate with two adjacent cutting supports.
• the conveyor further comprises an air cleaning device for the cutting supports.
• the air cleaning device may include an air blast nozzle and a dust collector.
• a further subject of the invention is an automatic blade cutting machine for sheet material comprising a conveyor as defined above.
• FIG. 1 Figure 1 (already discussed) is a schematic view of an end of the cutting table of the prior art.
• Figure 2 shows one end of a suction cutting conveyor provided with a plurality of cutting supports according to one embodiment of the invention.
• Figure 3 is a magnifying glass of Figure 2 showing more precisely the cutting supports of Figure 2 at the level of the unloading combs of the cutting surface.
• FIG. 4 is a magnifying glass of FIG. 3 showing more precisely the shape of the sole of the cutting supports of FIG. 2.
• FIG. 5 shows in perspective and partially the sole of the cutting supports of FIG. 2.
• FIG. 6 schematically represents the deformation of a cutting support sole according to an alternative embodiment of the invention.
• the present invention relates to cutting supports for a suction cutting conveyor of an automatic blade cutting machine for sheet material, such as the conveyor 10 partially shown in Fig. 2.
• such a cutting conveyor 10 serves to drive the stack of sheets during the cutting operation.
• This cutting conveyor 10 is typically housed in a box 12 inside which a strong depression is established in order to keep the sheets of material to be cut immobile during the cutting operation.
• the cutting conveyor also serves as a penetrating cutting support for the vibrating blade. It is indeed well known to make the cutting support penetrable by the blade so that during the cutting operation the blade can not only completely pass through the material to be cut, but also extend downwards beyond. the support surface and in the bed of material providing such a surface.
• the cutting conveyor 10 generally comprises a plurality of cutting supports 14.
• Each cutting support comprises a plurality of bristles 16 each having a foot 16a mounted on a sole 18 forming several rows. parallel bristles, and a head 16b opposite the foot and on which is intended to rest the material in sheets to be cut (see Figure 3).
• the cutting supports 14 are mounted by means of their respective soles on a drive belt 20 driven at each end of the table by pinions 24 centered on horizontal axes 22.
• the drive belt 20 is thus driven along straight (between the two ends of the cutting table) and curvilinear (at each end of the cutting table to turn around).
• the drive belt could be replaced by a chain, a toothed belt or any other drive mechanism.
• transverse channels 25 are made through the sole of the cutting supports in order to allow the suction air to pass through the sole (FIG. 4).
• the cutting supports thus make it possible to support the material to be cut under suction while being able to be penetrated by the cutting blade. They define the cutting surface S of the cutting machine.
• the cutting table comprises a plurality of unloading combs 26 which are generally raised. relative to the cutting surface (see the prior art of Figure 1). These unloading combs 26 extend over the entire width of the cutting surface and thus help to aid in the unloading of material from the cutting surface.
• the cutting table also includes a plurality of loading combs (not shown in the figures) which are generally raised from the cutting surface and that help load material onto the cutting surface.
• the sole 18 on which the bristles 16 of the various cutting supports are mounted is capable of being able to be elastically deformed by following the paths of the drive belt 20.
• the sole 18 of each cutting support has a plurality of parallel geometric shapes which extend in directions perpendicular to the direction of advance of the drive belt to allow to deform elastically following the paths of the drive belt.
• the geometric shapes of the sole of the cutting supports are here formed by a plurality of parallel crenellations (or folds) which extend in a transverse direction (that is to say which extend in a direction perpendicular to the direction of advance T of the cutting conveyor).
• crenellations are composed of external crenellations 28a projecting outwardly from the sole and internal crenellations 28b projecting towards the inside of the support.
• the crenellations 28a, 28b are arranged alternately so as to give an accordion shape to the sole giving it its properties of aptitude for plastic deformation.
• the crenellations have a rectangular section. This section could alternatively be square or rounded. Likewise, the crenellations of the sole could only be present on one of the two faces of the sole (that is to say projecting outwardly or inwardly only of the sole).
• the elastic deformation is made possible thanks to the particular shape of the sole. It thus makes it possible, on the one hand to avoid an excessively large opening between the adjacent cutting supports, and on the other hand to limit, or even reduce to zero, the height of elevation of the unloading combs 26 relative to the surface of cut S.
• the sole 18 ′ of the cutting supports has intrinsic characteristics giving it a property of elastic deformation due to its composition.
• the sole 18 ' is made of a plastic material capable of allowing it to deform elastically by following the trajectories of the drive mechanism (in FIG. 6, the sole 18' is in a state distorted).
• the plastic material will be chosen, for example, from the families of polyamides or polypropylenes.
• FIG. 6 represents a modular cutting support element 36 as described in detail in patent application FR 20/03043 filed on March 27, 2020 by the Applicant.
• This modular element 36 comprises a plurality of bristles 16 'arranged along the same and single line and whose respective feet are integral with a sole 18' made of a plastic material capable of allowing it to deform elastically.
• the sole 18 ' is provided with a plurality of transverse channels 25' for the passage of the suction air.
• the sole and the bristles of a cutting support are made of different materials (in particular plastics). We will now describe different characteristics of the cutting support regardless of its embodiment.
• each cutting support 14 is mounted on the drive belt 20 by means of two fastening slats 30 spaced longitudinally from one another.
• each cutting support can be mounted on the drive belt by means of three fixing slats spaced longitudinally from one another.
• each cutting support is mounted on the drive belt via three fastening slats; a fastening slat mounted only on the slat, and two other fastening slats mounted in common on the cutting support and on the two adjacent cutting supports.
• the cutting conveyor 10 may further comprise a device for cleaning the cutting supports 14 by air.
• This cleaning device comprises in particular an air blowing nozzle 32 which is mounted on the horizontal axis 22 of one of the pinions 24 and which extends along a radius thereof.
• the nozzle 32 bears against the outer face of the sole of the cutting supports and blows air through it to take off dust and impurities lodged at the bottom of the sole.
• a collector 34 positioned opposite the cutting support on the side of the bristle head makes it possible to recover the dust thus dislodged.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Treatment Of Fiber Materials (AREA)
• Details Of Cutting Devices (AREA)
• Control Of Cutting Processes (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=72560827

Family Applications (1)

Country Status (8)

Families Citing this family (1)

Family Cites Families (3)

• 2020
  • 2020-06-24 FR FR2006636A patent/FR3111836B1/fr active Active
• 2021
  • 2021-06-22 WO PCT/FR2021/051137 patent/WO2021260320A1/fr unknown
  • 2021-06-22 EP EP21740158.7A patent/EP4139101A1/de active Pending
  • 2021-06-22 US US18/008,883 patent/US20230211518A1/en active Pending
  • 2021-06-22 MX MX2022015694A patent/MX2022015694A/es unknown
  • 2021-06-22 CN CN202180039234.5A patent/CN115697658A/zh active Pending
  • 2021-06-22 KR KR1020227041981A patent/KR20230026306A/ko unknown
  • 2021-06-22 JP JP2022570335A patent/JP2023530590A/ja active Pending

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