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
  • B26D7/01—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
  • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
  • B26D7/0675—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form specially adapted for piles of sheets
• • 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
• • 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
  • B26D7/27—Means for performing other operations combined with cutting
  • B26D7/32—Means for performing other operations combined with cutting for conveying or stacking cut product
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
  • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
  • B26F1/38—Cutting-out; Stamping-out
  • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
  • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
  • B26F1/382—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge
• • 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
  • B26D7/18—Means for removing cut-out material or waste
  • B26D2007/1809—Means for removing cut-out material or waste by stripping fingers
• • 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
  • B26D7/27—Means for performing other operations combined with cutting
  • B26D7/32—Means for performing other operations combined with cutting for conveying or stacking cut product
  • B26D2007/322—Means for performing other operations combined with cutting for conveying or stacking cut product the cut products being sheets, e.g. sheets of paper

Definitions

• the invention relates to the general field of automatic cutting machines for a mattress of sheets of material, in particular textile materials, using a vibrating blade penetrating into a suction cutting support driven by a conveyor. It relates more specifically to the loading and unloading combs fitted to such cutting machines.
• a vibrating blade cutting machine typically includes a cutting conveyor which is used to drive the mat of sheets to be cut 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 stationary during the cutting operation.
• the cutting conveyor also serves as a penetrating cutting support for the vibrating blade. It is in fact known to make the cutting support penetrable by the blade so that during the cutting operation, the blade can not only completely cross 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 support generally consists of an assembly of blocks driven by a conveyor belt, each block comprising a plurality of bristles mounted on a sole in several parallel rows. Transversal channels are made through the sole to allow the passage of the suction air. These blocks thus make it possible to support the mattress of sheets of material to be cut while being able to be penetrated by the cutting blade.
• Vibrating blade cutting machines are also equipped with loading and unloading combs which are located at each end of the conveyor.
• the loading combs have the function of assisting in the transfer of the mat of sheets of material to be cut from an upstream mating table onto the upstream end of the conveyor of the cutting machine.
• the unloading combs have the function of assisting in the transfer of the cut mat from the downstream end of the conveyor of the cutting machine to an unloading conveyor situated downstream.
• the unloading combs therefore constitute the transition between the area where the mattress is kept under vacuum (i.e. on the suction cutting support) and the area without vacuum (i.e. on the conveyor unloading). Also, these unloading combs must make it possible to ensure continuity in the maintenance of the mattress while minimizing the surfaces of the bristles of the cutting supports which are not in contact with the mattress.
• the unloading combs generally comprise several inclined and parallel projections which penetrate through the bristles of the cutting supports so as to form a ramp which guides the cut mat out of the cutting surface towards the unloading conveyor. These projections are arranged parallel to each other and cover the entire width of the cutting surface at the downstream end of the conveyor.
• the unloading combs known from the prior art have certain drawbacks.
• the bristles of the cutting supports can undergo deformations which make their distribution heterogeneous.
• the unloading combs known from the prior art do not make it possible to rearrange the support bristles which pass through the combs.
• the main object of the present invention is therefore to provide a comb which does not have the aforementioned drawbacks.
• This object is achieved by means of a modular comb element for a machine for automatic cutting of a mat of sheets of material, the cutting machine comprising a plurality of cutting supports mounted on a conveyor and each comprising a plurality of bristles on which is intended to rest the mat of sheets of material to be cut, the comb element comprising a plate forming a support from which extend longitudinally a first and a second row of teeth, the teeth of the first row alternating with the teeth of the second row, and a free end of the teeth of the first row being farther from a downstream edge of the support than a free end of the teeth of the second row of teeth, and further comprising, according to the invention, a ramp mounted on the downstream edge of the support and inclined relative to the latter so as to limit the contact surface between the sheet mattress and the comb, and air injection means at the level from a downstream edge of the ramp over the entire width thereof in order to facilitate the
• the comb according to the invention is remarkable in particular in that it provides a ramp which is mounted on the downstream edge of the support and which is inclined relative to the latter.
• This ramp, and the air injection means associated with it makes it possible to limit the contact surface between the sheet mat (to be unloaded or loaded) and the comb in order to facilitate the transition between the part of the mat which is subject to aspiration and that which is not.
• the unloading (or loading) of the mattress of sheets of material is thereby greatly facilitated.
• the reed according to the invention is also remarkable in that it consists of a plurality of independent modular elements which are assembled on the same plate to ensure continuity between the cutting conveyor and the unloading conveyor (for the reed unloading) and between the spreading table and the cutting conveyor (for the loading comb).
• the combs being very stressed parts, making them modular allows to be able to change only the elements which could have been damaged.
• the comb according to the invention is further remarkable in that it provides two rows of teeth.
• the teeth of the first row make it possible to straighten the bristles of the cutting supports of the machine which have suffered a deformation to the point of not no longer be perpendicular to the mat of sheets of material.
• the teeth of the second row they make it possible to tighten the heads of the bristles of the cutting supports in order to limit the free space between them.
• the air injection means may comprise at least one downstream row of air injection orifices emerging at the level of the downstream edge of the ramp between two adjacent teeth and opening into an air supply channel which spans the full width of the support.
• the air injection means may further comprise a second downstream row of air injection orifices opening out at the level of the downstream edge of the ramp between two adjacent teeth and opening into the channel of air supply.
• the air injection means may further comprise an upstream row of air injection orifices emerging at an upstream edge of the ramp and opening into the air supply channel .
• the air supply channel may be in communication with surrounding air or in communication with a pressurized air circuit.
• the comb element further comprises a third row of teeth which is independent of the first and second rows of teeth and which is mounted under the support recessed longitudinally with respect to the first and second rows of teeth.
• the teeth of this third row make it possible to reposition the bristles of the cutting supports which would have been potentially deformed during their passages through the other two rows of teeth.
• the teeth of the third row of teeth can extend longitudinally from an upstream edge of the support opposite the downstream edge.
• a free end of the teeth of the third row of teeth can be recessed longitudinally relative to the downstream edge of the support.
• the teeth of the third row of teeth are preferably offset laterally relative to the teeth of the first row of teeth and to the teeth of the second row of teeth.
• the free end of the teeth of the first row of teeth has a bulbous shape. This bulbous shape makes it possible to guide the stem of the bristles of the cutting supports before their respective heads are fully engaged through the comb element.
• the lateral distance separating two adjacent teeth of the first row of teeth corresponds substantially to the lateral bulk of an even number of adjacent bristles of the cutting supports, and the lateral distance separating two adjacent teeth of the first and second rows of teeth corresponds substantially to half the lateral distance separating two adjacent teeth of the first row of teeth.
• the invention also relates to a machine for automatic cutting of a mat of sheets of material, comprising a plurality of cutting supports which are mounted on a conveyor and which each comprise a plurality of bristles on which the mat is intended to rest of sheets of material to be cut, the machine further comprising at at least one of its ends a comb consisting of a plurality of comb elements as defined previously.
• the end may be an unloading end and/or a loading end (in which case the reed is an unloading reed and/or an unloading reed, respectively).
• Some comb elements may have different characteristics from other comb elements.
• characteristics is meant in particular the number of teeth of the two rows, their lengths, their shapes, their positions, etc.
• Figure 1 is a partial side view showing the unloading end of a cutting machine provided with an unloading comb according to the invention.
• Figure 2 is a perspective view of an unloading reed member of Figure 1.
• Figure 3 is a perspective view of a comb element according to an alternative embodiment of the invention.
• Figure 4 is a top view of the comb element of Figure 3.
• Figure 5 is a bottom view of the comb element of Figure 3.
• Figure 6 is a side view of the comb member of Figure 3.
• Figure 7 is a cross-sectional view of the comb member of Figure 3.
• the mat of sheets of material to be cut is driven by a cutting conveyor during the cutting operation.
• the upper part of the cutting conveyor serves as a cutting support and the lower part is generally housed in a box inside which a strong depression is established in order to keep the material to be cut immobile during the cutting operation.
• Figure 1 partially shows the downstream end (known as the unloading end) of such a cutting machine 2.
• the cutting support 4 consists of an assembly of a plurality of blocks which are mounted on a cutting conveyor drive belt (not shown).
• each block of the cutting support comprises a plurality of bristles 6 which are aligned in parallel rows.
• Each bristle 6 has a foot 6a mounted on a sole 8 and a head 8b which is opposite the foot and which is intended to serve as a support for the mattress M of sheets of material to be cut.
• the blocks of the cutting support can be formed by assembling a plurality of modular elements, each modular element comprising bristles arranged in a same and unique row of hairs. Furthermore, at the level of the downstream end of the cutting surface (relative to the direction of the direction of advance T of the cutting conveyor), the cutting machine comprises an unloading comb which is typically raised with respect to the cutting surface and which extends over the entire width thereof.
• the main function of the unloading comb is to help transfer the mattress M to be unloaded from the downstream end of the cutting conveyor to an unloading conveyor (not shown).
• the unloading comb is modular, that is to say it is composed of a plurality of modular comb elements 10 which are placed end to end to form the comb.
• each comb element 10 comprises a substantially horizontal plate 12 forming a support from which extend longitudinally a first row of teeth 14 and a second row of teeth 16, the teeth of the first row alternating with the teeth of the second row.
• a free end of the teeth 14 of the first row is farther from a downstream edge of the support than a free end of the teeth 16 of the second row of teeth.
• the teeth 14 of the first row protrude with respect to the teeth 16 of the second row.
• the teeth 14, 16 of these two rows of teeth have a substantially triangular shape with a respective upper edge 14a, 16a which is inclined downwards relative to the substantially horizontal support 12 of the comb element.
• the inclination of the upper edge 16a of the teeth 16 of the second row is higher than that of the upper edge 14a of the teeth 14 of the first row.
• the free end of the teeth 14 of the first row of teeth has a bulbous shape, that is to say a rounded bulge shape as can be seen in particular in FIGS. 3 and 4.
• This particular shape of bulb makes it possible to ensure the guiding of the stem of the bristles 6 of the cutting supports before the head 6b of the latter is completely engaged through the unloading comb.
• the bulb-shaped free end of the teeth 14 is located below the entire head so as not to interfere with the shaft of the bristles.
• a ramp 18 is mounted on the downstream edge of the support 12 of each comb element 10.
• this ramp 18 extends in the upstream continuity of the teeth 14, 16 and is inclined downwards with respect to the support 12 which is substantially horizontal. As shown in Figure 6, the ramp 18 thus has an angle of inclination a relative to the support 12 which is between 0 and 45 ° and which is substantially equal to the angle of inclination made by the upper edges 14a respective teeth 14 of the first row.
• the ramp 18 thus arranged makes it possible to limit the contact surface between the mattress M to be unloaded and the comb element 10.
• Each comb element 10 according to the invention further comprises air injection means at a downstream edge of the ramp 18 over the entire width of the latter in order to facilitate the unloading of the mattress M.
• these air injection means comprise at least one downstream row of air injection orifices 20 which open out at the level of the downstream edge of the ramp 18 between two teeth adjacent 14, 16 and which open into an air supply channel 22 which extends over the entire width of the support.
• the air injection means further comprise a second downstream row of air injection orifices 24 which also open out at the level of the downstream edge of the ramp 18 between two adjacent teeth 14, 16 and which are open into the same air supply channel 22.
• the air injection means further comprise an upstream row of air injection orifices 26 which emerge at the level of an upstream edge of the ramp 18 and which open into the channel of air supply 22.
• these orifices 26 of the upstream row are positioned at a longitudinal end of the ramp 18 opposite to that where the orifices 20, 24 of the downstream rows are positioned.
• the orifices 26 of the upstream row open out in a substantially vertical direction, while the orifices 20, 24 of the downstream rows open out in substantially horizontal directions.
• the air supply channel 22 which is common to all the air injection orifices 20, 24 and 26 can be supplied with surrounding air or be in communication with a pressurized air circuit (not shown) .
• All of the air injection orifices 20, 24 and 26 make it possible to put the zone of the ramp 18 at atmospheric pressure or in slight overpressure (depending on the supply of the channel 22) in order to limit the part of the mattress to be unloaded subjected to depression due to suction in the cutting conveyor.
• the transfer of the mattress M from the cutting conveyor to the unloading conveyor is thereby greatly facilitated.
• the comb element 10 further comprises a third row of teeth 28 which is independent of the first and second rows of teeth 14, 16 and which is mounted under the support 12 set back longitudinally with respect to to the first and second rows of teeth.
• the teeth 28 of this third row of teeth extend longitudinally from an upstream edge of the support 12 which is opposite the downstream edge.
• the free end of the teeth 28 of the third row of teeth can be recessed longitudinally relative to the downstream edge of this support 12.
• the teeth 28 of the third row of teeth are preferably offset laterally relative to the teeth 14 of the first row of teeth and the teeth 16 of the second row of teeth.
• the teeth 28 of the third row are inserted laterally between two adjacent teeth 14, 16 belonging to the first and second rows.
• the teeth 28 of this third row of teeth have the function of ensuring a repositioning of the bristles 6 of the cutting supports 4 which would have been potentially deformed during their passages through the other two rows of teeth 14, 16.
• the lateral distance d separating two adjacent teeth 14 of the first row of teeth corresponds substantially to the lateral bulk of an even number of adjacent bristles 6 of the cutting supports 4 .
• this lateral distance between two adjacent teeth 14 corresponds to the lateral space requirement of four bristles 6 of the cutting support 4.
• the lateral distance d_' separating two adjacent teeth 14, 16 of the first and second rows of teeth corresponds substantially to half the lateral distance d separating two adjacent teeth 14 of the first row of teeth.
• this lateral distance corresponds to the lateral bulk of two bristles 6 of the cutting support.
• the unloading comb is modular, that is to say it is composed of a plurality of modular comb elements as described above which are placed end to end.
• This modularity has the particular advantage that certain comb elements of the unloading comb can have different characteristics from the other comb elements depending on the specificities of the underlying cutting supports.
• the cutting machine comprises, at the level of the opposite longitudinal end of the cutting surface, a loading reed (not shown in the figures ) which is generally raised with respect to the cutting surface and which makes it possible to assist in the loading of the mat of sheets of material from the spreading table towards the cutting surface.
• each comb element has the same characteristics as those which have been described in connection with the unloading comb.

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)
• Nonmetal Cutting Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=74860225

Family Applications (1)

Country Status (8)

Family Cites Families (4)

• 2021
  • 2021-01-18 FR FR2100452A patent/FR3118895B1/fr active Active
• 2022
  • 2022-01-12 JP JP2023542880A patent/JP2024502660A/ja active Pending
  • 2022-01-12 WO PCT/FR2022/050063 patent/WO2022153006A1/fr active Application Filing
  • 2022-01-12 EP EP22703692.8A patent/EP4244029A1/de active Pending
  • 2022-01-12 CN CN202280009725.XA patent/CN116710246A/zh active Pending
  • 2022-01-12 MX MX2023008284A patent/MX2023008284A/es unknown
  • 2022-01-12 KR KR1020237025157A patent/KR20240055693A/ko unknown
  • 2022-01-12 US US18/261,044 patent/US20240058980A1/en active Pending

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