CA1316099C - Vacuum-grip cutting table - Google Patents
Vacuum-grip cutting tableInfo
- Publication number
- CA1316099C CA1316099C CA000554230A CA554230A CA1316099C CA 1316099 C CA1316099 C CA 1316099C CA 000554230 A CA000554230 A CA 000554230A CA 554230 A CA554230 A CA 554230A CA 1316099 C CA1316099 C CA 1316099C
- Authority
- CA
- Canada
- Prior art keywords
- vacuum
- holes
- tiles
- whlch
- conveyor
- 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
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
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/005—Vacuum work holders
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Treatment Of Fiber Materials (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Details Of Cutting Devices (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Vacuum Packaging (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A cutting table with a vacuum grip having means required to connect the vacuum to a conveyor table on which the strip material to be cut with a numerically controlled machine is fixed. The table is of the type made up by a succession of tiles connected to the links of two chains (or group thereof) which are closed and which slip or run along guides and mesh with at least two toothed wheels which provide the movement. On the upper face of the loop formed by the succession of tiles, a bridge runs with supports and movement devices of its own which provide it with the movement in the same direction as the conveyor. On this bridge, a carriage moves with the tools for working the material.
in order to hold the strip material, a vacuum is applied in accordance with the subject of this invention, under the working surface formed by the upper face of the conveyor. The vacuum is applied to each of the tiles which are hermetic enclosures with outlets only on the outside faces of the loop created by the con-veyor.
A cutting table with a vacuum grip having means required to connect the vacuum to a conveyor table on which the strip material to be cut with a numerically controlled machine is fixed. The table is of the type made up by a succession of tiles connected to the links of two chains (or group thereof) which are closed and which slip or run along guides and mesh with at least two toothed wheels which provide the movement. On the upper face of the loop formed by the succession of tiles, a bridge runs with supports and movement devices of its own which provide it with the movement in the same direction as the conveyor. On this bridge, a carriage moves with the tools for working the material.
in order to hold the strip material, a vacuum is applied in accordance with the subject of this invention, under the working surface formed by the upper face of the conveyor. The vacuum is applied to each of the tiles which are hermetic enclosures with outlets only on the outside faces of the loop created by the con-veyor.
Description
~ 3 ~
The present Inventlon relates to a vacuum-grlp cuttlng table.
There are many patents dlrected to the cuttlng of tex-tlles or slmilar materlals on fixed tables on whlch the materlalsare held In place by a vacuum. Because of the dlmenslons of the materlal to be cut (large lengths) moblle tables were provlded whlch feed the materlal, so operatlon by sectlons, thus prevent-lng cuttlng dlmenslons whlch are the same as or larger than those of the materlal to be cut. Wlth thls system, the means of vacuum grlp cannot b0 of such slmple deslgn as Is the case wlth a sta-tlonary table. The problem of sealln~ the movlng parts led to the complete encloslng of the conveyor table In a hermetlcally sealed "drawer" leavlng the top part open. Once the fabrlc Is In place, It Is closed by some Impermeable material whlch does not allow the passage of alr and Is normally thrown away once It has been plerced by the cuttlng blade. Appllcatlons of thls technol-ogy are to be found In the GERBER GARMENT TECHNOLOG~ INC. S~ ;5 patents Nos, 520,922, 520,923 and 520,924 and STUMPF Vn;t~ 5 patent No. 4,322993.
One of the dlsadvantages of the sald system Is the sturdlness requlred for the drawer, slnce the vacuum levels used, and the relatlvely large areas, glve rlse to very hlgh forces ~of some tons).
Other solutlons whlch have been developed Include the construction of a hermetlcally sealed chamber under the cutting table surface whlch, through valves, communlcates wlth separate sectlons, as In the Gerber Spanlsh patent No. 506,931. A sult-able synchronlsm ensures that the open valves provlde a vacuum to thé area of the materlal on whlch the cuttlng tool Is worklng.
Thls method only partly solves the problem, slnce the sectloned area under vacuum must be large enough to cover an area of the 3~ matertal whlch ensUres tha~ It Is held fast In splte of the actlon of the cutter. Thus, h I gh load leveis must be sustalned.
\
~ 3 ~
Subsequent work led to increased sectioning of the area of the vacuum, and the cutting table became overcomplicated; see Gerber U.S. patent Nos. 4,485,712 and 4,528,878.
The present invention provides a simple solution of the vacuum application, which does not create large sealed chambers nor does it r~quire sectioning, so that construction is dramatiFally simplified According to the present invention there is provided a vacuum-grip cutting table having mean~ to connect a vacuum from a stationary source to a mobile table, a cut being effected by successive sections of a stack of a flexible material which is moved forward by the mobile table, said means comprising a central suction pipe which is attached to a frame and which is hermetically sealed except on a top side thereof,.wherein there are holes aligned with a further set of holes in the bottom of tubes or tiles located at right angles thereto and which are driven by chains, to form a : ~ supporting base of a penetrable surface which is permeable to : air and on whic~ the material to be worked is placed, and means for preventing side leaks between upper side surfaces of the central pipe and shorter sides of said tubes or tiles whereby a seal is created between longitudinal sides of said tube~ or tiles and the penetrable surfacel since the vacuum generated inside only reaches the penetrable surface through holes made therefor, and from there to the top face where the fabr~c is in place, and the fabric is secured due to the :
difference in atmospheric pressure, and the vacuum created in the penetrab].e surface.
: Thus:, the present invention provides the devices ~''''' ' .
' , , L3~$~3 xequired to deliver the vacuum to a conveyor table where the strip material to be cut with a numerically controlled machine is held in place~
In one embodiment of the present invention the table includes a plastic strip witA a low friction coefficient located `; ~ :
:
- 2a -,i"~:"~
~ 3 ~
on the top surface of the central suctlon plpe, whlch has a set of holes In llne wl~h those on the sald plpe, and on whlch the tlles sllp. Deslrably to prevent vacuum loss In the llnk between the flxed Plpe and the movln~ tlles, rubber strlps are fltted onto the central plpe, In contact wlth the plastlc support strlp, and whlch rub on ~he bottom surfaces of the tlles and so guaran-tee a hermetlc seal, together with the pressurlzed seal formed by the tlle support on the plastlc strlp.
In another embodlment of the present Inventlon the arrangement of holes In the central suctlon plpe Is such that, for any posltlon of the moblle table, there Is a compiete or par-tlal alIgnmen~ between these holes and those In the undersldes of the tlles, the dlstance between the holes In the plpe belng less than thelr length, and the length of the holes In the tlles also belng the same. Sultably a contlnuous slot In ~he central suc-tlon plpe ensures the complete Flow of alr through the holes In the tlles. DesIrably plastlc gaskets are fl~ted between the plpes formed by the tlles, fIxed or housed In thelr sldes, at rlght angles to the dlrectlon of movement, to prevent the entry of alr from outslde the loop In the dlrectlon of the penetrable surface. Sultably the ends of the tlles are rlgld parts whlch hermetlcally seal the plpes and on whlch gaske~tIng Is fItted to prevent alr from enterlng from the sldes of the table In the ~2~ directlon of the penetrable surface. Preferably the end sectlons are made of plastlc foam whlch, when compressed between one tlle and another, seal off the admlsslon of alr.
In speclflc terms, the table Is of the type made up of 3Q a successlon of tlles connected to the llnks In two chalns (or group thereof) whlch are closed and sllp or run on guldes and mesh at least on two toothed wheels whlch provlde the movement.
On the upper surface of the loop formed by the successlve tlles, ; a brldge runs wlth supports and dlsplacement devlces of Its own whlch provlde It wlth movement In the same dlrectlon as the con-veyor. On thls brldge, a carrlage runs whlch has the tools ~ 3 ~
requlred for worklng the matçrlal. In order to secure the strlp materlal, a vacuum Is applledt In accordance wlth the subJect of thls Inventlon, under the worklng sur~ace whlch l~ formed by the conveyor's U~Per face. The sald vacuum Is communlcated to each of the tlles, whlch are hermetlcally sealed enclosures wlth out-lets only on the surfaces outslde the loop formed by the con-veyor.
The presen$ Inventlon wlll be further Illustrated by way of the accompanylng drawlngs, In whlch:-Flgure 1 Is a top perspectlve vlew of a cuttln~ machlneof the type to whlch thls Inventlon applles;
Flgure 2 Is a detall of the X-Y axls transmlsslon ele-ments;
FIgure 3 Is a dlagrammatlc proflle vlew of Flgure 1;
Flgure 4 Is a detall of the moblle table;
Flgure 5 Is a detall of ~he sectlon In whlch the vacuum Is dellvered to the cuttIng zone;
Flgure 6 Is a sectlonal vlew o~ the moblle tlles;
Flgure 7 Is a perspectlve vlew of ~he tlles, wlth another deslgn for the end seal; and Flgure 8 Is a dlagram of the general pressure dlstrlbu-tlon.
~eferrlng to Flgure 1, from a spreadlng table 5, the stack of str!p materla~ 12 Is fed by ~he conveyor 14. The cut panels 18 are wlthdrawn at zone 16 and, as well, at the adJacen~
section of the conveyor. The geome~ry of the cut Is obtalned by :~3~6~
movement of the brIdge 20 or X carrlage, and the Y carrlage 22.
A controller 24 handles these movements, driving the motors of the X and Y carrlages. The carrlage 22 has a sultable cuttlng tool for the materlal to be worked whlch, as can be seen from Flgure 2, Is dlrected on guldes 26. Thls Flgure a 150 shows the drlve motor 28 and ~he belt whlch transmlts the movement 30.
Three motors are to be found In thls carrlage, namely the blade drlve motor, tha~ ~or allgnlng the blade In the tangentlal dlrec-tlon on the cutting llne, and the sharpenlng motor. The X axls carrlage Is dlrected on the guldes 32 and It~ motor 34, moored on the frame, moves the brldge by means of belt 36. The Interactlon between the cut and the table movement descrlbed In aPpllcant's Spanlsh patent No. 541,~26 Is brlefly descrlbed by way of contln-uatlon.
The conveyor Is dlvlded Into three sectlons> as can be seen In Flgure 3, namely a feed zone 38, a cuttlng zone 40 and a collectlon zone 42. The materlal Is spread In advance on a table 5 In whlch holes ~or the adm~sslon of pressurlzed alr facllltate the sllppage of the materlal In the dlrectlon of the cuttlng machlne. After cuttlng the panels whlch are whole in the cUtting zone, beglnnlng at the polnt of the X=0 abs~clssa, the conveyor, drlven by a motor 44 can move along the mlnlmum absclssus, corre-; spondlng to the next panel to be cUt, and whlch was not wholly wlthin the cuttlng~wlndow 40. The prevlously cut sectlon ofmaterlal will be In zone 42 whlch contInues to a collectlon table 16.
The Panels furthest from the cuttlng zone wlll be col-lected, and, when the brldge Is close to the maxlmum absclssus, those;whlch are closest> for reasons whlch wlll be explalned beiow. The connectlon~between tables 16 and 5 wlth the conveyor Is by means of combs 46>~whlch provlde a smooth transltlon In feed and collectlon.
Fl~ure 4 shows the conveyor table (for clarlty> the .
\
~ 3 ~ 3 loadlng and unloadlng tables are not shown, nor are the X car-rlage drlves and guldes).
The chaln of tlles 48 Is shown, flxed to the chaln 50 whlch Is gulded on a sultable sectlon, preferably of plastl G
materlal for elImlnatlon of frlctlon and nolse. The wheels 54, drlven by motor 44, move the chalns In accordance wlth the orders and data from the controller, whlch follows the worklng sequence prevlously descrlbed. An optlcal codlfler 56 secured to the shaft glves on-golng Informatlon on the exact posltlon of the chaln so that, by comparlson agalnst the slgnal from the codlfler whlch Is Incorporated into the X carrlage drlve motor 34, the relatlve posltlons of the brldge and conveyor wlll be avallable.
Flgure 5 shows detall of the constructlon of the tlles 48, along wlth the vacuum communlcatlon system whlch malntalns the materlal to be worked In place under atmospherlc pressure, whlch Is the baslc purPOse of thls Inventlon. The tlles are made up of a hollow tube 58 whlch Is hermetlcally sealed at the ends by sectlons 60; on the underslde there Is a large openlng 62 and, on the upper surface, a varlety of holes whlch connect wlth blocks of brls~les or mats whlch are permeable to alr 64.
Flgure ~ shows the detall of a preferred connectlon 2~ between the sald tube and mats; wlth thls system, by extractlng the end sectlon 60, the mats can be removed. The drlll hoies 59 and the base 61, permeable to alr, are shown. The successlon of the sald blocks forms the worklng surface whlch, In thls case, Is a surface whlch can be penetra~ed by a cuttlng blade.
The tube 66 Is secured In the conveyor; wlth the appro~
prlate connectlons, It llnks wlth the vacUum generate~ by pump 68. On the upper face of tube 56, a strlp o~ plastlc materlal 70 Is flxed, wlth low frtctlon and wear rates. Tube 66 and strlp 70 have wlde openlngs 72 dellverlng the vacUum through holes 62 to the tlles 48 whlch sllp over the sald strlp. When the chalns BO
~ 3 ~
llnked to the tubes 5~, drlve the tlles, drlll-holes 62 and 72 are always wholly or partlally alIgned, so ~hat the vacuum can be delIvered; thls Is because the dlstance between holes 72 Is less than thelr length whlle, at the same tlme, ~hey are the same size as the holes 62 In the tlles. From tubes 58, the vacuum flows to the mats 64; to prevent lealcs between the tlles, gaskets 74 are provlded. Slmllarly, to ~nsure the seal between strlp 70 and the tubes 58, rubber strlps 76 are provlded to complete the hermetlc seal of the Inslde face of the conveyor's worklng surface.
Ano~her preferred deslgn replaces the drlll-holes 72 for a contlnuous openlng of the length correspondlng to the area of applIcatlon of ths vacuwm, so that the alr movement In the holes 62 In thls area Is never Impeded. The upper face ~ormed by the mats 64 Is the support for the materlal to be cut; If It Is not suffIclently Impermeable, throw~away plastlc can be used to close thls surface, and the materlal, or the plastlc and ma~erlal Is held In place under atmospherlc pressure. In the sectlons 60, there are drlll holes 78 for securlng the coverlng plastlc by means of the vacuum, thus preventlng these sectlons 60 from enterlng the connectlons.
Another deslgn for the tlle ends shown In Flgure 7 would be to replace the sectlons ~0 wlth blocks of flexlble mate-rlal 120 whlch Is also ImpermeablP, e.g. some type of plastlcfoam, whlch would be at the same helght as the mats 64, but sllghtly wlder; the compresslon of thls excess over the tlle Is what would prevent slde leaks; In the prevlous verslon, thls was the functlon of the gasket 74 on the slde of sectlon 60. Depend-Ing on the length of zones 38, 40 and 42 In Figure 3, the length ; Is fIxed of the drllled sectlon of tube 66 or, In other words, the length over whlch the vacuum Is applled to the tlles. Flgure 8 shows a general layout of pressures, descrIbed qualltatIvely by way of contlnuatlon.
~ The pump 68 generates a P0 vacuum, part of whlch Is ~ 3 ~
iost In the ducting to the Input to tube 66. If a pressure of P1Is obtalned at the sald Input, there Is a further loss of load In the transltlon to the tlles, ~n other words, at the mat, pressure P2 wlll be greater than P1. As the se~urlng of the materlal 12 Is based on the dlfference between pressures Pa-P2, P2 needs to be as low as posslble, thus requlrlng the smallest posslble loss between the pump outpUt and the ma~ or, in other words, P2 should be slmllar to P0, whlch Is the lowest pressure In the entlre clr-cult.
The sald dlfference of pressure should be at a maxlmum In the cuttlng zone 40, and, at zone 38, It shouid be enough to carry the fabrlc from the spreadlng table.
At sectlons A and B, where the loop beglns to curve, there Is an openlng to the atmosphere, so ~hat pressure P2 should Increase progresslvely through the mat, untll reachlng atmo~
spherlc pressure Pa.
~. . .
The vacuum applIcatlon must be Introduced as far as posslble Into zone 38; however, If ~n thls zone the pressure Is P3, the loss of load Pa-P3 needed at openlng ~ wlll be obtalned wlth hlgh flows, so that the pump's level of Impulslon wlll not be sufflclent. Thus, the suctlon zone tends to be concentrated ; 25 and to be kept away from the open end sectlons, so as to obtaln a good Pa-P~ dlfference. Thls gentle drop, because of the length of mat reachedj ensures ~hat the materlal wlll be suffIclently secured over an area whlch wlll allow It to be moved.
In the A sectlon on the dlscharge end, the problem Is not so great; all tha~ ts requlred Is to take the precautlon descrlbed above In the method for operatlon of collectlon from zone 42, flrst, of panels whlch are neares~ to Section A and, when the cuttlng brldge Is at the end of the cutttng zone 40, to collect the panels whtch are tnslde ths collectlon zone.
The present Inventlon relates to a vacuum-grlp cuttlng table.
There are many patents dlrected to the cuttlng of tex-tlles or slmilar materlals on fixed tables on whlch the materlalsare held In place by a vacuum. Because of the dlmenslons of the materlal to be cut (large lengths) moblle tables were provlded whlch feed the materlal, so operatlon by sectlons, thus prevent-lng cuttlng dlmenslons whlch are the same as or larger than those of the materlal to be cut. Wlth thls system, the means of vacuum grlp cannot b0 of such slmple deslgn as Is the case wlth a sta-tlonary table. The problem of sealln~ the movlng parts led to the complete encloslng of the conveyor table In a hermetlcally sealed "drawer" leavlng the top part open. Once the fabrlc Is In place, It Is closed by some Impermeable material whlch does not allow the passage of alr and Is normally thrown away once It has been plerced by the cuttlng blade. Appllcatlons of thls technol-ogy are to be found In the GERBER GARMENT TECHNOLOG~ INC. S~ ;5 patents Nos, 520,922, 520,923 and 520,924 and STUMPF Vn;t~ 5 patent No. 4,322993.
One of the dlsadvantages of the sald system Is the sturdlness requlred for the drawer, slnce the vacuum levels used, and the relatlvely large areas, glve rlse to very hlgh forces ~of some tons).
Other solutlons whlch have been developed Include the construction of a hermetlcally sealed chamber under the cutting table surface whlch, through valves, communlcates wlth separate sectlons, as In the Gerber Spanlsh patent No. 506,931. A sult-able synchronlsm ensures that the open valves provlde a vacuum to thé area of the materlal on whlch the cuttlng tool Is worklng.
Thls method only partly solves the problem, slnce the sectloned area under vacuum must be large enough to cover an area of the 3~ matertal whlch ensUres tha~ It Is held fast In splte of the actlon of the cutter. Thus, h I gh load leveis must be sustalned.
\
~ 3 ~
Subsequent work led to increased sectioning of the area of the vacuum, and the cutting table became overcomplicated; see Gerber U.S. patent Nos. 4,485,712 and 4,528,878.
The present invention provides a simple solution of the vacuum application, which does not create large sealed chambers nor does it r~quire sectioning, so that construction is dramatiFally simplified According to the present invention there is provided a vacuum-grip cutting table having mean~ to connect a vacuum from a stationary source to a mobile table, a cut being effected by successive sections of a stack of a flexible material which is moved forward by the mobile table, said means comprising a central suction pipe which is attached to a frame and which is hermetically sealed except on a top side thereof,.wherein there are holes aligned with a further set of holes in the bottom of tubes or tiles located at right angles thereto and which are driven by chains, to form a : ~ supporting base of a penetrable surface which is permeable to : air and on whic~ the material to be worked is placed, and means for preventing side leaks between upper side surfaces of the central pipe and shorter sides of said tubes or tiles whereby a seal is created between longitudinal sides of said tube~ or tiles and the penetrable surfacel since the vacuum generated inside only reaches the penetrable surface through holes made therefor, and from there to the top face where the fabr~c is in place, and the fabric is secured due to the :
difference in atmospheric pressure, and the vacuum created in the penetrab].e surface.
: Thus:, the present invention provides the devices ~''''' ' .
' , , L3~$~3 xequired to deliver the vacuum to a conveyor table where the strip material to be cut with a numerically controlled machine is held in place~
In one embodiment of the present invention the table includes a plastic strip witA a low friction coefficient located `; ~ :
:
- 2a -,i"~:"~
~ 3 ~
on the top surface of the central suctlon plpe, whlch has a set of holes In llne wl~h those on the sald plpe, and on whlch the tlles sllp. Deslrably to prevent vacuum loss In the llnk between the flxed Plpe and the movln~ tlles, rubber strlps are fltted onto the central plpe, In contact wlth the plastlc support strlp, and whlch rub on ~he bottom surfaces of the tlles and so guaran-tee a hermetlc seal, together with the pressurlzed seal formed by the tlle support on the plastlc strlp.
In another embodlment of the present Inventlon the arrangement of holes In the central suctlon plpe Is such that, for any posltlon of the moblle table, there Is a compiete or par-tlal alIgnmen~ between these holes and those In the undersldes of the tlles, the dlstance between the holes In the plpe belng less than thelr length, and the length of the holes In the tlles also belng the same. Sultably a contlnuous slot In ~he central suc-tlon plpe ensures the complete Flow of alr through the holes In the tlles. DesIrably plastlc gaskets are fl~ted between the plpes formed by the tlles, fIxed or housed In thelr sldes, at rlght angles to the dlrectlon of movement, to prevent the entry of alr from outslde the loop In the dlrectlon of the penetrable surface. Sultably the ends of the tlles are rlgld parts whlch hermetlcally seal the plpes and on whlch gaske~tIng Is fItted to prevent alr from enterlng from the sldes of the table In the ~2~ directlon of the penetrable surface. Preferably the end sectlons are made of plastlc foam whlch, when compressed between one tlle and another, seal off the admlsslon of alr.
In speclflc terms, the table Is of the type made up of 3Q a successlon of tlles connected to the llnks In two chalns (or group thereof) whlch are closed and sllp or run on guldes and mesh at least on two toothed wheels whlch provlde the movement.
On the upper surface of the loop formed by the successlve tlles, ; a brldge runs wlth supports and dlsplacement devlces of Its own whlch provlde It wlth movement In the same dlrectlon as the con-veyor. On thls brldge, a carrlage runs whlch has the tools ~ 3 ~
requlred for worklng the matçrlal. In order to secure the strlp materlal, a vacuum Is applledt In accordance wlth the subJect of thls Inventlon, under the worklng sur~ace whlch l~ formed by the conveyor's U~Per face. The sald vacuum Is communlcated to each of the tlles, whlch are hermetlcally sealed enclosures wlth out-lets only on the surfaces outslde the loop formed by the con-veyor.
The presen$ Inventlon wlll be further Illustrated by way of the accompanylng drawlngs, In whlch:-Flgure 1 Is a top perspectlve vlew of a cuttln~ machlneof the type to whlch thls Inventlon applles;
Flgure 2 Is a detall of the X-Y axls transmlsslon ele-ments;
FIgure 3 Is a dlagrammatlc proflle vlew of Flgure 1;
Flgure 4 Is a detall of the moblle table;
Flgure 5 Is a detall of ~he sectlon In whlch the vacuum Is dellvered to the cuttIng zone;
Flgure 6 Is a sectlonal vlew o~ the moblle tlles;
Flgure 7 Is a perspectlve vlew of ~he tlles, wlth another deslgn for the end seal; and Flgure 8 Is a dlagram of the general pressure dlstrlbu-tlon.
~eferrlng to Flgure 1, from a spreadlng table 5, the stack of str!p materla~ 12 Is fed by ~he conveyor 14. The cut panels 18 are wlthdrawn at zone 16 and, as well, at the adJacen~
section of the conveyor. The geome~ry of the cut Is obtalned by :~3~6~
movement of the brIdge 20 or X carrlage, and the Y carrlage 22.
A controller 24 handles these movements, driving the motors of the X and Y carrlages. The carrlage 22 has a sultable cuttlng tool for the materlal to be worked whlch, as can be seen from Flgure 2, Is dlrected on guldes 26. Thls Flgure a 150 shows the drlve motor 28 and ~he belt whlch transmlts the movement 30.
Three motors are to be found In thls carrlage, namely the blade drlve motor, tha~ ~or allgnlng the blade In the tangentlal dlrec-tlon on the cutting llne, and the sharpenlng motor. The X axls carrlage Is dlrected on the guldes 32 and It~ motor 34, moored on the frame, moves the brldge by means of belt 36. The Interactlon between the cut and the table movement descrlbed In aPpllcant's Spanlsh patent No. 541,~26 Is brlefly descrlbed by way of contln-uatlon.
The conveyor Is dlvlded Into three sectlons> as can be seen In Flgure 3, namely a feed zone 38, a cuttlng zone 40 and a collectlon zone 42. The materlal Is spread In advance on a table 5 In whlch holes ~or the adm~sslon of pressurlzed alr facllltate the sllppage of the materlal In the dlrectlon of the cuttlng machlne. After cuttlng the panels whlch are whole in the cUtting zone, beglnnlng at the polnt of the X=0 abs~clssa, the conveyor, drlven by a motor 44 can move along the mlnlmum absclssus, corre-; spondlng to the next panel to be cUt, and whlch was not wholly wlthin the cuttlng~wlndow 40. The prevlously cut sectlon ofmaterlal will be In zone 42 whlch contInues to a collectlon table 16.
The Panels furthest from the cuttlng zone wlll be col-lected, and, when the brldge Is close to the maxlmum absclssus, those;whlch are closest> for reasons whlch wlll be explalned beiow. The connectlon~between tables 16 and 5 wlth the conveyor Is by means of combs 46>~whlch provlde a smooth transltlon In feed and collectlon.
Fl~ure 4 shows the conveyor table (for clarlty> the .
\
~ 3 ~ 3 loadlng and unloadlng tables are not shown, nor are the X car-rlage drlves and guldes).
The chaln of tlles 48 Is shown, flxed to the chaln 50 whlch Is gulded on a sultable sectlon, preferably of plastl G
materlal for elImlnatlon of frlctlon and nolse. The wheels 54, drlven by motor 44, move the chalns In accordance wlth the orders and data from the controller, whlch follows the worklng sequence prevlously descrlbed. An optlcal codlfler 56 secured to the shaft glves on-golng Informatlon on the exact posltlon of the chaln so that, by comparlson agalnst the slgnal from the codlfler whlch Is Incorporated into the X carrlage drlve motor 34, the relatlve posltlons of the brldge and conveyor wlll be avallable.
Flgure 5 shows detall of the constructlon of the tlles 48, along wlth the vacuum communlcatlon system whlch malntalns the materlal to be worked In place under atmospherlc pressure, whlch Is the baslc purPOse of thls Inventlon. The tlles are made up of a hollow tube 58 whlch Is hermetlcally sealed at the ends by sectlons 60; on the underslde there Is a large openlng 62 and, on the upper surface, a varlety of holes whlch connect wlth blocks of brls~les or mats whlch are permeable to alr 64.
Flgure ~ shows the detall of a preferred connectlon 2~ between the sald tube and mats; wlth thls system, by extractlng the end sectlon 60, the mats can be removed. The drlll hoies 59 and the base 61, permeable to alr, are shown. The successlon of the sald blocks forms the worklng surface whlch, In thls case, Is a surface whlch can be penetra~ed by a cuttlng blade.
The tube 66 Is secured In the conveyor; wlth the appro~
prlate connectlons, It llnks wlth the vacUum generate~ by pump 68. On the upper face of tube 56, a strlp o~ plastlc materlal 70 Is flxed, wlth low frtctlon and wear rates. Tube 66 and strlp 70 have wlde openlngs 72 dellverlng the vacUum through holes 62 to the tlles 48 whlch sllp over the sald strlp. When the chalns BO
~ 3 ~
llnked to the tubes 5~, drlve the tlles, drlll-holes 62 and 72 are always wholly or partlally alIgned, so ~hat the vacuum can be delIvered; thls Is because the dlstance between holes 72 Is less than thelr length whlle, at the same tlme, ~hey are the same size as the holes 62 In the tlles. From tubes 58, the vacuum flows to the mats 64; to prevent lealcs between the tlles, gaskets 74 are provlded. Slmllarly, to ~nsure the seal between strlp 70 and the tubes 58, rubber strlps 76 are provlded to complete the hermetlc seal of the Inslde face of the conveyor's worklng surface.
Ano~her preferred deslgn replaces the drlll-holes 72 for a contlnuous openlng of the length correspondlng to the area of applIcatlon of ths vacuwm, so that the alr movement In the holes 62 In thls area Is never Impeded. The upper face ~ormed by the mats 64 Is the support for the materlal to be cut; If It Is not suffIclently Impermeable, throw~away plastlc can be used to close thls surface, and the materlal, or the plastlc and ma~erlal Is held In place under atmospherlc pressure. In the sectlons 60, there are drlll holes 78 for securlng the coverlng plastlc by means of the vacuum, thus preventlng these sectlons 60 from enterlng the connectlons.
Another deslgn for the tlle ends shown In Flgure 7 would be to replace the sectlons ~0 wlth blocks of flexlble mate-rlal 120 whlch Is also ImpermeablP, e.g. some type of plastlcfoam, whlch would be at the same helght as the mats 64, but sllghtly wlder; the compresslon of thls excess over the tlle Is what would prevent slde leaks; In the prevlous verslon, thls was the functlon of the gasket 74 on the slde of sectlon 60. Depend-Ing on the length of zones 38, 40 and 42 In Figure 3, the length ; Is fIxed of the drllled sectlon of tube 66 or, In other words, the length over whlch the vacuum Is applled to the tlles. Flgure 8 shows a general layout of pressures, descrIbed qualltatIvely by way of contlnuatlon.
~ The pump 68 generates a P0 vacuum, part of whlch Is ~ 3 ~
iost In the ducting to the Input to tube 66. If a pressure of P1Is obtalned at the sald Input, there Is a further loss of load In the transltlon to the tlles, ~n other words, at the mat, pressure P2 wlll be greater than P1. As the se~urlng of the materlal 12 Is based on the dlfference between pressures Pa-P2, P2 needs to be as low as posslble, thus requlrlng the smallest posslble loss between the pump outpUt and the ma~ or, in other words, P2 should be slmllar to P0, whlch Is the lowest pressure In the entlre clr-cult.
The sald dlfference of pressure should be at a maxlmum In the cuttlng zone 40, and, at zone 38, It shouid be enough to carry the fabrlc from the spreadlng table.
At sectlons A and B, where the loop beglns to curve, there Is an openlng to the atmosphere, so ~hat pressure P2 should Increase progresslvely through the mat, untll reachlng atmo~
spherlc pressure Pa.
~. . .
The vacuum applIcatlon must be Introduced as far as posslble Into zone 38; however, If ~n thls zone the pressure Is P3, the loss of load Pa-P3 needed at openlng ~ wlll be obtalned wlth hlgh flows, so that the pump's level of Impulslon wlll not be sufflclent. Thus, the suctlon zone tends to be concentrated ; 25 and to be kept away from the open end sectlons, so as to obtaln a good Pa-P~ dlfference. Thls gentle drop, because of the length of mat reachedj ensures ~hat the materlal wlll be suffIclently secured over an area whlch wlll allow It to be moved.
In the A sectlon on the dlscharge end, the problem Is not so great; all tha~ ts requlred Is to take the precautlon descrlbed above In the method for operatlon of collectlon from zone 42, flrst, of panels whlch are neares~ to Section A and, when the cuttlng brldge Is at the end of the cutttng zone 40, to collect the panels whtch are tnslde ths collectlon zone.
Claims (3)
1. A vacuum-grip cutting table having means to connect a vacuum from a stationary source to a mobile table, a cut being effected by successive sections of a stack of a flexible material which is moved forward by the mobile table, said means comprising a central suction pipe which is attached to a frame and which is hermetically sealed except on a top side thereof, wherein there are holes aligned with a further set of holes in the bottom of tubes or tiles located at right angles thereto and which are driven by chains, to form a supporting base of a penetrable surface which is permeable to air and on which the material to be worked is placed, and means for preventing side leaks between upper side surfaces of the central pipe and shorter sides of said tubes or tiles whereby a seal is created between longitudinal sides of said tubes or tiles and the penetrable surface, since the vacuum generated inside only reaches the penetrable surface through holes made therefor, and from there to the top face where the fabric is in place, and the fabric is secured due to the difference in atmospheric pressure, and the vacuum created in the penetrable surface.
2. A table according to claim 1, including a plastic strip with a low friction coefficient located on the top surface of the central suction pipe, which has a set of holes in line with those on the said pipe, and on which the tiles slip.
3. A table according to claim 1, in which the arrangement of holes in the central suction pipe is such that, for any position of the mobile table, there is a complete or partial alignment between these holes and those in the undersides of the tiles, the distance between the holes in the pipe being less than their length, and the length of the holes in the tiles also being the same.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8.603.432 | 1986-12-15 | ||
| ES8603432A ES2006729A6 (en) | 1986-12-15 | 1986-12-15 | Improvements to a vacuum-grip cutting table. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1316099C true CA1316099C (en) | 1993-04-13 |
Family
ID=8248885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000554230A Expired - Fee Related CA1316099C (en) | 1986-12-15 | 1987-12-14 | Vacuum-grip cutting table |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0271116B2 (en) |
| JP (1) | JP2588224B2 (en) |
| AT (1) | ATE82601T1 (en) |
| CA (1) | CA1316099C (en) |
| DE (1) | DE3782727T3 (en) |
| DK (1) | DK167320B1 (en) |
| ES (1) | ES2006729A6 (en) |
| FI (1) | FI86564C (en) |
| IE (1) | IE61401B1 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4646911A (en) * | 1985-09-05 | 1987-03-03 | Gerber Garment Technology, Inc. | Conveyorized vacuum table for feeding sheet material |
| US5303626A (en) * | 1990-11-09 | 1994-04-19 | Canon Kabushiki Kaisha | Cutting apparatus |
| US5189936A (en) * | 1991-04-05 | 1993-03-02 | Gerber Garment Technology, Inc. | Conveyor for supporting and advancing sheet material and cutting machine including such conveyor |
| DE4128367A1 (en) * | 1991-06-03 | 1993-03-04 | Bullmer Spezialmaschinen Gmbh | METHOD FOR CUTTING PARTS (CUT-OUT) FROM A MATERIAL SHEET, IN PARTICULAR FABRIC SHEET |
| JP2547681B2 (en) * | 1991-09-06 | 1996-10-23 | 株式会社島精機製作所 | Brush mounting structure for cutting support surface in automatic cutting machine |
| JP2979181B2 (en) * | 1991-09-18 | 1999-11-15 | 株式会社島精機製作所 | Cutting device |
| JP2757746B2 (en) * | 1993-07-09 | 1998-05-25 | マックス株式会社 | Cutting method and apparatus for workpieces such as cloth |
| US5825652A (en) * | 1995-09-08 | 1998-10-20 | Gerber Garment Technology, Inc. | Sample garment making system |
| ES2161599B1 (en) * | 1999-03-18 | 2002-07-01 | Investronica Sist S S A | CONTROL SYSTEM FOR THE VACUUM LEVEL ON A CUTTING TABLE FOR LAMINARY MATERIAL. |
| KR101153198B1 (en) * | 2005-10-04 | 2012-06-18 | 니혼쇼료쿠키카이 가부시키가이샤 | Ultrasonic trimming method |
| CN102528147A (en) * | 2011-12-24 | 2012-07-04 | 常州市宏发纵横新材料科技股份有限公司 | Cutting machine |
| JP6346742B2 (en) * | 2013-12-05 | 2018-06-20 | イビデン株式会社 | Sheet material cutting method |
| DE102015109740A1 (en) * | 2015-06-18 | 2016-12-22 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Machine for separating processing of plate-shaped materials |
| CN105127962A (en) * | 2015-10-12 | 2015-12-09 | 重庆大成优美数控科技有限公司 | Numerical control cutting platform |
| CN108556032B (en) * | 2018-01-20 | 2019-10-01 | 中航迈特粉冶科技(徐州)有限公司 | A kind of water purifier hose cutter device |
| CN108685318A (en) * | 2018-05-08 | 2018-10-23 | 安徽六顺达刷业有限公司 | A kind of plastic strip cutter device making brush filament |
| CN112626829A (en) * | 2020-12-07 | 2021-04-09 | 韩文杰 | Weaving cutting device |
| CN113550133B (en) * | 2021-07-22 | 2022-08-30 | 上海雁峰纺织品有限公司 | Automatic cutting equipment auxiliary mechanism for textile fabric processing and forming clothing |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3495492A (en) * | 1969-05-05 | 1970-02-17 | Gerber Garment Technology Inc | Apparatus for working on sheet material |
| ES8101972A1 (en) * | 1979-01-31 | 1980-12-16 | Gerber Garment Technology Inc | Apparatus and method for working on successive segments of sheet material |
| DE2908701A1 (en) * | 1979-03-06 | 1980-09-11 | Guenter O Stumpf | DEVICE FOR RECEIVING AND FASTENING RAIL-SHAPED MATERIAL, IN PARTICULAR OF SEVERAL MULTIPLE STRUCTURAL MATERIALS, FOR A CUTTING MACHINE |
| US4485712A (en) * | 1981-12-28 | 1984-12-04 | Gerber Garment Technology, Inc. | Method and apparatus for holding sheet material in a sectioned vacuum bed |
| US4528878A (en) * | 1981-12-28 | 1985-07-16 | Gerber Garment Technology, Inc. | Method and apparatus for holding sheet material on a sectioned vacuum bed |
| US4494433A (en) * | 1982-01-25 | 1985-01-22 | Gerber Garment Technology, Inc. | Apparatus for working on sheet material and having movable vacuum chamber |
| DE3578791D1 (en) * | 1984-03-19 | 1990-08-30 | Ontario Die Co | DEVICE FOR CUTTING UNDER PRESSURE OF A MATERIAL PROVIDED ON THE REAR SIDE. |
| GB2175237B (en) * | 1985-05-22 | 1988-07-27 | Gerber Scient Inc | Apparatus and method for supporting and working on sheet material |
| JPH0537896A (en) * | 1991-06-18 | 1993-02-12 | Canon Inc | Recorder |
-
1986
- 1986-12-15 ES ES8603432A patent/ES2006729A6/en not_active Expired
-
1987
- 1987-11-02 FI FI874816A patent/FI86564C/en not_active IP Right Cessation
- 1987-12-04 DK DK640187A patent/DK167320B1/en not_active IP Right Cessation
- 1987-12-14 IE IE337987A patent/IE61401B1/en not_active IP Right Cessation
- 1987-12-14 CA CA000554230A patent/CA1316099C/en not_active Expired - Fee Related
- 1987-12-14 DE DE3782727T patent/DE3782727T3/en not_active Expired - Fee Related
- 1987-12-14 AT AT87118526T patent/ATE82601T1/en not_active IP Right Cessation
- 1987-12-14 EP EP87118526A patent/EP0271116B2/en not_active Expired - Lifetime
- 1987-12-15 JP JP62320065A patent/JP2588224B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3782727T3 (en) | 1998-05-20 |
| DE3782727T2 (en) | 1993-04-15 |
| FI86564B (en) | 1992-05-29 |
| FI874816A0 (en) | 1987-11-02 |
| DK640187D0 (en) | 1987-12-04 |
| EP0271116A1 (en) | 1988-06-15 |
| DK640187A (en) | 1988-06-16 |
| ATE82601T1 (en) | 1992-12-15 |
| FI874816A (en) | 1988-06-16 |
| EP0271116B2 (en) | 1998-03-11 |
| DE3782727D1 (en) | 1992-12-24 |
| IE61401B1 (en) | 1994-11-02 |
| IE873379L (en) | 1988-06-15 |
| JPS63191597A (en) | 1988-08-09 |
| FI86564C (en) | 1992-09-10 |
| DK167320B1 (en) | 1993-10-11 |
| JP2588224B2 (en) | 1997-03-05 |
| EP0271116B1 (en) | 1992-11-19 |
| ES2006729A6 (en) | 1989-05-16 |
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| MKLA | Lapsed |