Classifications

• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
  • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
  • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
  • B05B12/24—Masking elements, i.e. elements defining uncoated areas on an object to be coated made at least partly of flexible material, e.g. sheets of paper or fabric
• • 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
  • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
  • B26D3/12—Slitting marginal portions of the work, i.e. forming cuts, without removal of material, at an angle, e.g. a right angle, to the edge of the work
• • 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
  • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
• • 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
  • 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
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T83/00—Cutting
  • Y10T83/04—Processes
  • Y10T83/0524—Plural cutting steps

Definitions

• the present invention relates to a method and to a device for manufacturing masking articles for a part of a vehicle, in order to protect this part from dirt likely to result from the painting of another part of this vehicle.
• the technical field of the invention is that of automobile body repair.
• glazed part essentially means the unpainted parts of the vehicle, in particular the windshield, the rear window, the left and right side windows, the headlight and taillight optics, the exterior mirrors, as well as '' other parts such as wheels, wheel trims, bumpers or protective strips.
• masking For this masking operation, also called masking, generally, either recovery paper or paper packaged in a roll; for each member to be protected, an operator manually cuts and / or tears a mask blank from a sheet of this paper; the shape and dimensions of this blank are approximately determined by the operator as a function of the shape and dimensions of the member to be protected; in no case does the shape of the blank thus formed correspond precisely to that of the member to be protected; the operator can then tear and / or crease the blank in order to roughly adapt its outline to that of the organ to be protected; these operations are long and delicate, and it never results in a mask with a shape perfectly suited to that of the part to be protected.
• the document FR2600917 describes the principle of a multi-layer mask in the shape of a disc for the protection of an airplane window, without giving any indication of the materials, machines and processes suitable for its manufacture.
• US Pat. No. 4,789,579 proposes to cut a Y-shaped mask with a cookie cutter for the protection of an automobile bumper.
• a mask for protecting a glazed and / or curved part of a vehicle which is made of a sheet material, and whose contour is curvilinear, at least in part and generally in full, the outline of the mask corresponding, after deformation of the mask by pressing it against said vehicle part, to the outline of this part;
• this document recommends using a thin and light sheet material, monolayer and generally substantially free of adhesive, of thickness less than 200 microns, in particular situated in a range going from 20 to 80 microns; the material has a surface mass of less than 200 g / m 2, in particular situated in a range from 20 to 80 g / m2.
• this document proposes to use a material having, on its two faces, a high resistance to the penetration of these substances, in particular a greaseproof paper (grease-proof) on both sides, or a two-sided coated kraft paper made of polyethylene, or a plastic material resistant to the solvents used for painting the vehicle.
• a material having, on its two faces, a high resistance to the penetration of these substances in particular a greaseproof paper (grease-proof) on both sides, or a two-sided coated kraft paper made of polyethylene, or a plastic material resistant to the solvents used for painting the vehicle.
• This document also describes a method of manufacturing these masks, in which a stack of a plurality of sheets of said material is formed, then cut simultaneously, by the action of a jet of liquid (in particular water) or a laser beam, the plurality of sheets stacked so as to obtain a plurality of identical masks, optionally extended by extension strips or portions; alternatively, this document proposes to carry out the cutting along the outline of the mask by flame cutting, by punching or plasma.
• This manufacturing process is well suited to obtaining a large quantity of identical masks; it is however desirable to propose other methods of manufacturing such masks, in particular methods suitable for the production of masking masks individually and on demand.
• the object of the invention is to provide a method and an apparatus for manufacturing masking masks, which are improved and which remedy, at least in part, the drawbacks of known methods and devices.
• the object of the invention is to provide a method and an apparatus for manufacturing masking masks from a thin sheet material, which are compatible with the significant variations in temperature and hygrometry encountered in automobile repair shops. .
• the object of the invention is to propose a method and an apparatus for manufacturing masking masks from a fragile sheet material, without causing tears in the masks obtained and / or in the sheet material used.
• the object of the invention is to propose a method and an apparatus for manufacturing masking masks while minimizing the falls of unusable sheet material.
• the object of the invention is to provide a method and an apparatus for manufacturing masking masks with precision and speed.
• the present invention also aims to provide a method and an apparatus specially designed to manufacture, individually and on demand, protective masks of any “glass part”, flat or left, of a vehicle with engine, in particular of any road, air or rail transport vehicle.
• the object of the invention is also to propose improved masking masks.
• the invention proposes a method in which: a) a sheet material is presented opposite a sheet material support, b) the sheet material is kept in contact with a face - called d support of the sheet material support, c) a mask is cut from the sheet material maintained in contact with the support of sheet material, using a cutting tool which is moved relative to the support and / or to the sheet material, preferably in an interrupted manner to forming connecting portions between the periphery of the mask and the sheet material surrounding the mask, and d) the mask is separated from the sheet material and / or from the support.
• the invention results in a device for manufacturing a mask from a sheet material, which comprises: a support for sheet material, - holding means for temporarily holding the sheet material in contact with the support, cutting means for cutting a mask in the material held against a face of the support, the cutting means being associated with displacement means to cause relative movement of a cutting tool and the support and / or sheet material, preferably means for controlling movement and / or interruption of the cutting means to cause a discontinuous cut and form connecting portions between the periphery of the mask and the sheet material, as well as preferably, supply means for placing the sheet material facing the support, and if necessary separation means for separating the mask - and, where appropriate, a fall e - support for sheet material.
• the cutting tool is preferably moved relative to the support at a speed of movement within a range of 0.01 at 1.00 meters per second, and more preferably within a range of 0.05 to 0.50 meters per second.
• a monolayer sheet material is used having a surface mass lying in the range from 40 to 90 grams per square meter , preferably still located in a range from 50 to 80 grams per square meter, in particular close to 60 to 70 grams per square meter.
• a collection of masks adapted to a given vehicle is displayed on a display device, one or more masks are selected from the mask collection, a relative positioning configuration is determined selected masks leading to a reduced fall rate, and the cutting of the masks is controlled according to this configuration.
• one selects a vehicle from a collection of vehicles, reads from a geometric database of masks and / or glazed parts of vehicles, the data corresponding to a collection of masks adapted to the selected vehicle, and uses this data. to display said collection of masks.
• the sheet material is moved relative to the support during the cutting of a mask, preferably at a speed lower than the speed of movement of the cutting member relative to the support , to minimize the risk of tearing;
• a cutting blade is preferably used which is mounted to pivot freely relative to a movable blade support, along an axis substantially perpendicular to the support and / or to the sheet material;
• the blade is moved relative to the sheet material along at least three or four axes or directions;
• the sheet material is kept in contact with the support both by suction and by pressure between pressure rollers for driving the sheet material.
• the invention provides a masking mask for part of a motor vehicle capable of being obtained by a process defined above, which has a jagged outline, generally curvilinear.
• the device further comprises: - means for detecting and / or measuring a physico-chemical property of the sheet material and / or its packaging, and comparison means connected to the means detection and / or measurement to compare the detected or measured property with a predetermined property, - validation means connected to the comparison means for, when the detected or measured property corresponds to the determined property, authorize the actuation of a at least part of the device, in particular to authorize the actuation of the holding means and / or cutting means,
• This in particular makes it possible to verify, by comparison of a measured property of the sheet material with a predetermined value or characteristic of this property, if the material used is suitable for making a masking mask in optimal conditions; the invention also makes it possible to avoid deterioration of the cutting machine masks which would be likely to result from the use of a material unsuitable for this purpose.
• the property of the sheet material to be detected or measured can be chosen in particular from the dimensions of the material (its thickness in particular), its optical transmittance at one or more wavelength (s) of the visible, infrared, ultraviolet, or X range. ; for this purpose, the machine includes an optical or electromechanical sensor or detector suitable for detecting or measuring this property.
• the property to be detected can be a mark, a sign or an object affixed to (or attached to) the material or its packaging; it may in particular be a watermark, a notch provided along an edge of the material, a perforation of the material, a wire or a strip integral with the material and detectable by means of optical and / or magnetic detection.
• the predetermined value or characteristic of the detected or measured parameter can be data recorded in a memory of an integrated computer or connected to the machine, or can be materialized by an electric or electronic circuit (such as a threshold sensor) connected on the one hand to the sensor or detector of said property, and on the other hand to at least one actuator of the cutting machine.
• the detachment means preferably comprise inhibition means for deactivating the holding means; holding the sheet material against the support can be obtained by the action of mechanical, electromagnetic (in particular electrostatic), or fluid holding means.
• the mechanical holding means may comprise a clamp or a roller cooperating with the support to clamp a portion of the sheet material extending between the clamp and the support; these holding means are preferably movable between a holding position where they press the material against the support, and a detachment position where they allow the material to slide on the support.
• the electrostatic holding means may include a bipolar electrical voltage source, a first terminal having a first polarity is connected to the material (or to a first part of movable clamp), and a second terminal having a second polarity opposite to the first is connected to the support (or to a second movable clamp portion); these electrostatic holding means can be inhibited by disconnecting the source and bringing the terminals into electrical contact (short-circuited) by an electrical conductor.
• the fluid holding means may include a vacuum pump or turbomachine (such as a fan) capable of causing a vacuum (of air) in its suction duct, as well as orifices provided in the support of sheet material which open on the one hand on the support face of the support, and on the other hand in the suction duct or on a face of the support which is placed in communication with this duct; these holding means are particularly suitable for maintaining a single thickness of sheet material on the support.
• the operation of the apparatus is controlled by an electronic unit operating under the control of a configurable program.
• the system comprising the apparatus, the electronic control unit, and the program, furthermore comprises a geometric database of contour of “glazed parts” of vehicles; in the latter case, the system preferably includes means for entering a shrinkage - or shrinkage - value, this value allowing a program of the system to calculate a mask contour from a “glass part” contour .
• the system preferably includes a program for calculating the "flattening" of a left contour; this program makes it possible to constitute a two-dimensional geometric database of approximate contours of masks, from a three-dimensional geometric database of glazed parts.
• the shrinkage value is set by a system program, if necessary adjusted by an operator, and extends over a value range from 10 to 45 mm, in particular from 10 to 35 mm.
• the mask in order to facilitate the application of flat masks on a curved “glass” part, the mask is incised from its outline towards its center, so as to obtain at least one slit separating two portions adjacent mask devices; when the mask is pressed against the glazed part, the two portions can be superimposed before covering them with an adhesive, in order to improve the paint-tightness of the masking.
• a material as described in document WO 02/29767 which is packaged in a roll of length at least equal to 100 or 200 meters and of width on the order of one meter; moreover, in order to maintain a capacity for vision through a glazed part covered with a mask, it is preferable to use a transparent or translucent material to make the mask.
• a support such as a table
• a support such as a table
• orifices in the form of slots
• a flat support and / or a cylindrical roller or drum is used;
• a mask is cut using a cutting blade which is movable relative to the support along at least two or three axes or directions.
• Figures 1 and 3 schematically illustrate an apparatus according to a first embodiment of the invention
• Figure 1 is a perspective view of the apparatus
• Figure 3 is a sectional view along III-III of Figure 1.
• FIG. 2 is a perspective view of the apparatus and FIG. 4 is a sectional view along IN-IN of FIG. 2.
• FIG. 5 schematically illustrates, in section view, the use of a mask obtained by a method according to the invention for protecting an optic from vehicle lights.
• FIG. 6 schematically illustrates, in section view, the use of a mask obtained by a method according to the invention for protecting a curved glass wall of a vehicle.
• Figure 7 schematically illustrates the main components of a mask manufacturing system according to the invention.
• FIG. 8 schematically illustrates in front view, a mask with an incised (serrated) outline put in place on an ovoid part to be protected.
• FIG. 9 schematically illustrates in front view, two masks with a serrated outline obtained in accordance with the invention.
• FIG. 10 schematically illustrates the main steps of a method according to the invention.
• FIG. 11 schematically illustrates an apparatus according to a preferred embodiment of the invention.
• the device 1 comprises a support comprising a flat table 3 or a cylindrical drum 2; the apparatus 1 also comprises a support 4 for a roll 5 of paper 6 simulated parchment, as well as a cutting tool 7 equipped with a blade 8 and mounted movable relative to the support 2,3.
• a horizontal panel 9 separating the roller 5 from the drum 2 is pierced with a straight slot 10 allowing the passage of the paper 6 unwound from the roll 5 towards the drum and the cutting tool 7 , 8; similarly, a vertical front panel 11 is pierced with a rectilinear slot 12 allowing the passage of masks 13 cut, according to one part less than their outline 14, in the paper 6 by the tool 7, 8, as well as the part 15 of the paper 6 surrounding the masks 13 and forming a "fall".
• the respective axes 16 and 17 of rotation of the drum 2 and the roller 5, are horizontal and parallel; a part of the cylindrical wall with an axis 16 delimiting the hollow drum 2 is pierced with orifices 18 which bring the external face 19 of this wall part into communication with the cavity 20 of the hollow drum; this cavity is connected by a conduit 21 (partially shown) to the suction port of a compressor 22 which, when started, causes a vacuum (relative to the pressure - generally atmospheric - prevailing in the compartment 23 of the device) in the cavity 20; it follows from this depression that the part of the paper strip 6 extending opposite the pierced part of the wall of the drum is pressed and held in place against the external face 19 thereof.
• the cutting tool 7 to precisely and quickly cut a mask from the paper; for this purpose, the blade 8 of the tool is moved relative to the paper following the outline of the mask to be cut; this movement is controlled by a computer, as described in more detail below; the relative movement of the blade 8 and the paper 6 can result from the only movement of the blade 8 and / or of the tool 7, or else of a combined movement of the blade and the paper (and of the rotary drum 2).
• a device 24 for marking visual signs on one face of the mask is also incorporated into the device; this device may include a nozzle 25 for spraying ink onto the paper, or else a tool (not shown) for marking or dry punching of the mask.
• the table top 3 receiving the paper strip is pierced with a multitude of orifices 18 ensuring the same function as that described above concerning the drum, namely ensuring the maintenance of the paper 6 against the external face 26 of the table 3, due to the depression caused on the side of the internal face 27 of the plate 3, in the cavity 20 connected to the vacuum cleaner 22 by the conduit 21.
• the cutting tool 7 is suspended from a gantry 28 mounted movable in translation on rails 29 extending along a horizontal axis 30, along two opposite sides of the rectangular table 3; the tool 7 is also mounted movable in translation relative to the gantry 28, along a horizontal axis 31 perpendicular to the axis 30.
• Actuators allow movement of the cutting blade 8, of the cutting tool 7 equipped with the 8 blade, and of the gantry 28, as a function of control signals delivered by a computer 32 ( Figures 1 and 7).
• the area of the support face of the sheet material against the support (2 or 3) may be less than that of a mask to be produced, in order to increase the compactness of the device 1; in this case, the manufacture of a mask can be obtained by cutting a first portion of the mask, then causing a displacement (advance) of the sheet material relative to the support, then by cutting a second portion of the mask complementary to the first portion.
• the device may include motorized rollers for automatic driving of the paper strip, as the cutting progresses with the cutting tool.
• the footprint of the device will preferably be less than or equal to 10 m.2, in particular less than or equal to 2 or 3 m2.
• the means for moving the cutting tool and / or the paper strip are preferably designed to allow a mask to be cut in less than one or more minutes; preferably the manufacturing time of a mask is in a range from 1 to 120 seconds, more preferably from 1 to 60 seconds; for this purpose, the speeds of movement of the cutting blade and of the paper are maintained in the above ranges; in order to avoid or reduce the tears likely to result from these speeds, the cutting blade is preferably mounted freely pivoting.
• the computer (or electronic unit) 32 is respectively connected to the cutting tool 7 and to the actuators (not shown) allowing the displacement of the tool 7 on the one hand, to a reeling motor 33 roller 5 on the other hand, as well as a motor 34 for driving the vacuum cleaner 22, by means 35 to 37 of electromagnetic connection; these connection means make it possible to route the operating control signals delivered by the unit 32 to these members.
• the unit 32 is also connected by telecommunication means 38 (wired or wireless) to another unit 39 or computer; the latter is connected to a geometric database 40 of glazed parts of vehicles, so that it transmits the coordinates 32 geometrical - in particular those of the contour - of the glazed part in question, after reading these coordinates in the base 40, on request sent by the computer accompanied by identification data of a vehicle and / or of a glazed part determined, the request being transmitted by the means 38.
• telecommunication means 38 wireless or wireless
• a calculation program 41 determines, from these, a two-dimensional mask contour corresponding to this glazed part and records the corresponding geometric data in a database 42 associated with the computer 32.
• another program module of the computer 32 delivers, from the two-dimensional geometric contour data of masks read from the base 42, signals for controlling the movement of the blade of the tool 7 cutting, and if necessary control signals for unwinding the paper web and / or advance and / or back signals for the paper web on its support.
• This distance 43 is generally chosen to be substantially constant over the entire periphery of the glazed part; the value given to this distance will be comparatively higher when - as illustrated in FIG. 6 - the periphery of the wall 49 to be protected is engaged in a profile 52 surrounding the wall; conversely, it will be lower when the glazed part to be protected is immediately adjacent to the wall 53 to be painted, as illustrated in FIG. 5.
• the value of this distance is preferably "adjustable" by an operator entering a value for this purpose in the computer 32; this makes it possible to optimize the shape of the mask as a function of the width of an adhesive tape 54 chosen by the operator to secure the periphery of the mask to the periphery of the corresponding glazed part. Furthermore, the system can control the production by the cutting blade of one or more slots 55 (FIG.
• the masks are made from a thin, light, translucent or transparent sheet material, provided on both sides with good resistance to the penetration of aqueous or oily substances, such as greaseproof paper or plastic material with adequate electrostatic properties (high electrostatic power). As illustrated in FIGS.
• the apparatus comprises a light source 97 emitting an optical control light beam propagating along the axis 98, and further comprises an optical receiver 99 sensitive to the radiation emitted by the source 97, and located on the axis 98 which extends through the paper 6, near its edge; the receiver 99, as well as if necessary, the transmitter 97, is (are) connected (s) to the computer (32 FIG.
• this system allows the control of at least one optical parameter (opacity or presence of marks or notches along the edge) of the paper 6, by transmission of the measurement signals delivered at the output of the sensor 99, to the computer 32, and by comparison of a characteristic value of these measurement signals (amplitude or frequency, for example), with a reference value recorded in a memory associated with the computer.
• the rotation of the drum 2 and that of the roll 5 of paper are controlled to ensure a tensioning of the part of the paper strip 6 extending opposite the cutting member 8, which makes it possible to facilitate a precise cut of the paper.
• the device may include a brake to slow down the rotation of the roller 5.
• the paper tensioning means may also include one (or more) additional roller (s) (not shown) for driving the paper, with an axis parallel to the axes 1, 17, extending along the drum 2, in contact with a generator of the outer casing of the drum 2; these means may also include two rollers disposed between the drum 2 and the roller 5, for example in the vicinity of the slot 10; these rollers extending on either side of the strip 6, respectively in contact with the latter by one of their generatrix, these generatrixes being substantially combined, the braking of the rotation of these rollers makes it possible to tension the part of the strip 6 located between these and the paper drive drum 2.
• the tension of the paper to be cut can also be obtained by virtue of the presence of suction cups and / or of drive rolls (downstream) and of braking (upstream) of the paper.
• the device 1 comprises a support 212 resting on the ground 217 by means of feet 213; of the walls of the support 212 delimit a cavity 216 which is maintained in depression with respect to the ambient medium, by the action of a fan 22 driven in rotation about an axis 219, sucking the air into the cavity 216 and discharging the air according to the arrows 218.
• a bracket 4 fixed to the structure 212 supports a roll 5 of paper 6 rotatably mounted along the axis 17 relative to the support 4.
• the upper walls 202 and 203 of the structure 212 define a longitudinal slot extending parallel to the axis Y; a roller 210 rotatably mounted along an axis 211 parallel to Y, separates this slot into two slots 204 and 205 parallel to the Y axis; this roller, the upper generator of which extends in the extension of the edges of the walls 202, 203, supports the paper 6 in the vicinity of the cutting zone extending on the wall 202, near the slot 204.
• a blade 8 supported by an element 7, is mounted to rotate freely along an axis 200 parallel to a vertical axis Z, and extends above the paper cutting zone; the blade support 7 is mounted movable in translation relative to a support 201 along the axis 200 on the one hand, for allow engagement and disengagement of the blade and paper; the support 201 is mounted movable in translation along an axis parallel to the axis Y on the other hand, relative to the fixed structure 212, by a gantry similar to that illustrated in Figure 2; the blade is thus movable along three axes relative to the support 202, 212.
• a roller 206 is further provided for driving the paper 6 in sliding movement on the walls 202, 203, along an axis parallel to X, cooperating with the roller 210 opposite which it extends; for this purpose the roller 206 is mounted rotatably along an axis 209 parallel to Y, at the end of an arm 207 which is itself articulated along an axis 208 parallel to Y, by an actuator not shown, relative to the fixed structure 202, 203, 212; thanks to this articulation, the roller 206 can pass from a configuration for driving the paper by friction of the latter between the rollers 206 and 210 - one of which is rotated for driving the paper along the axis X -, to a configuration of free sliding of the paper on the support 202, 203, 210 corresponding to the position of the elements 206, 207 shown in dotted lines.
• the retention of the paper in the cutting zone extending under the blade 8 is obtained by the suction of air through slots 204, 205 and by clamping between the rollers 206 and 210, the latter also making it possible to entrain the paper along the X axis.
• the structure 212 further comprises a portion 215 of wall extending the cutting surface 202, which is inclined downward to allow, downstream of the zone 202, the masks 13 and falling paper 15 to fall into a container 214.
• connecting portions at the periphery of a mask makes it possible to keep it integral with the falls until its subsequent separation; this facilitates the expulsion of scraps and masks from the cutting area, and avoids the accumulation of these parts in this area under the effect of suction; these connecting portions are obtained by interrupting the cutting of the paper resulting from a raising of the blade along the axis 200, by an actuator controlled by a cutting control computer (not shown). As illustrated in FIG.
• the length - measured along the contour of the mask 301 - of a portion 300 of connection separating two successive portions 302 of cut contour is much less than the length of each of these portions, in order to facilitate the separation subsequent mask 301 of the fall 304 surrounding it; by way of example, the length of a connecting portion 300 can vary from 0.1 to 3 mm, and the length of each cut portion 302 extending between two connecting portions, can vary from 5 to 100 mm.
• the unit and demand cutting method comprises the following successive operations:
• An initialization step 100 allowing in particular the computer to verify the presence of a determined paper engaged between the drive rollers of the cutting machine;
• step 105 is repeated;
• steps 104 to 106 are replaced by a step of automatic selection of masks to be produced for the vehicle in question, according to a datum (which can be entered on the keyboard of the computer) for locating on the vehicle an impact zone suffered by the vehicle; depending on the position of the impact zone, a program determines the glazed parts close to this zone and for which a mask should be produced; - if the production of masks for another model of vehicle is desired (test 107 - branch 122), the data of the selected masks are recorded and execution is resumed at step 101;
• the command 109 for moving the blade and the paper is then carried out, until the pre-cutting of all the desired masks is obtained; in order to obtain a fast and precise cut without causing tears, the speeds of movement of the blade and of the paper drive rollers are maintained within the ranges indicated above;
• a marking 110 of each mask can be carried out before their evacuation 111 and the stopping of the machine.

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• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

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• 2003
  • 2003-08-11 CA CA002539341A patent/CA2539341A1/fr not_active Abandoned
  • 2003-08-11 WO PCT/FR2003/002504 patent/WO2004026546A1/fr not_active Application Discontinuation
  • 2003-08-11 AU AU2003274243A patent/AU2003274243A1/en not_active Abandoned
  • 2003-08-11 US US10/528,432 patent/US20060112801A1/en not_active Abandoned
  • 2003-08-11 EP EP03758226A patent/EP1539446A1/de not_active Withdrawn
• 2005
  • 2005-03-18 MA MA28161A patent/MA27446A1/fr unknown

Non-Patent Citations (1)

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