WO1995020889A1 - Adhesive applicator device - Google Patents
Adhesive applicator device Download PDFInfo
- Publication number
- WO1995020889A1 WO1995020889A1 PCT/GB1995/000149 GB9500149W WO9520889A1 WO 1995020889 A1 WO1995020889 A1 WO 1995020889A1 GB 9500149 W GB9500149 W GB 9500149W WO 9520889 A1 WO9520889 A1 WO 9520889A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adhesive
- ball
- substrate surface
- support
- substrate
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
- A43D25/00—Devices for gluing shoe parts
- A43D25/18—Devices for applying adhesives to shoe parts
- A43D25/181—Devices for applying adhesives to shoe parts by rollers
Definitions
- This invention is concerned with improvements in or relating to adhesive applicator devices and also to apparatus, comprising such devices, for applying adhesive progressively on the surface of a substrate along a selected path.
- EP-A-0 351 993 an adhesive applicator device comprising a nozzle having a housing in which a ball is accommodated and through which adhesive supplied thereto under pressure can flow, wherein the housing has, at the nozzle outlet, an end face having an aperture through which the ball cannot pass but through which a portion of the ball projects, such projection being limited by engagement of a rearward surface of the ball with abutment means within the housing and being such as to provide a spacing, through which adhesive can flow, between the rim of the aperture and the surface of the projecting portion of the ball, whereby a layer of adhesive can be applied to a surface of a substrate into engagement with which the ball is brought and along which the ball is traversed when the device is in use.
- This device moreover, also comprises a brush assembly having a plurality of bristles which extend in a direction lengthwise of the nozzle housing and which are disposed about the whole of the periphery of the end face and project therebeyond by a distance which can be set so that the bristles deform when the device is pressed against a workpiece surface, together with drive means for effecting rotation of the brush assembly about an axis extending lengthwise of the nozzle, i.e. the longitudinal centre line of the device, whereby, when the device is pressed against a workpiece surface the thus deformed bristles spread adhesive supplied from the nozzle over such surface.
- this arrangement has proved to be highly successful in depositing a layer of adhesive on a substrate surface, e.g. along marginal portions of a shoe bottom, and in ensuring that the adhesive penetrates the surface by the brushing action, while at the same time the spread of the adhesive over the surface is closely controlled, essentially by controlling the deformation of the bristles.
- the rate of flow of adhesive through the housing is a function of the viscosity of the adhesive, the pressure within the adhesive supply and the spacing between the rim of the aperture and the surface of the projecting portion of the ball. Moreover, the rate of flow of adhesive, together with the rate of traverse of the device along its selected path, determines the amount of adhesive which is applied to the substrate surface, so that there is little control over the thickness of the layer of adhesive applied to the substrate surface using this device. In some cases, it will be appreciated, thickness control is significant, e.g. in the case of an expensive adhesive or indeed where too thick a layer of adhesive would render the curing or setting time of the adhesive too long in terms of the particular application to which the adhesive is being put.
- an applicator nozzle especially for a hand-held applicator device, having an end face which is concave and thus forms a depression into which an aperture opens through which adhesive can be supplied to the depression, the depression itself being bounded about the whole of its periphery by a doctor blade formed at the convergence of the surface of the depression and an outer surface of the nozzle body.
- the nozzle in this case is made of a resiliently flexible material, e.g. silicone rubber, and consequently the thickness of the applied layer is determined essentially by the rheology of the material from which the nozzle body is made, rather than by any deformation thereof.
- a nozzle would be unsuitable in many applications because of wear, especially where there is any risk of the nozzle being moved across sharp metal surfaces, e.g. nail heads in the bottoms of shoes, which could tear the rubber. Consequently, for such applications a rubber nozzle would not generally be considered suitable.
- the thickness of the applied layer can be closely controlled with at least the same degree of accuracy as in the case of use of the nozzle disclosed in EP-A-0 102 765, but without the risk of damage attendant upon the latter nozzle.
- the end face is dished, thus to form a reservoir for adhesive which has flowed through said spacing.
- the ball also acts in a ball valve capacity, being resiliently urged out of engagement with the abutment means and into sealing engagement with the rim of the recess, and being urged into a retracted position in engagement with the abutment means when the device is in use and the ball is pressed against the substrate surface.
- This ball valve function may also be used in the device of the present invention.
- the nozzle housing providing the end face is mounted on a support providing the abutment means, said nozzle housing and support being positionally adjustable relative to one another along the direction of adhesive flow through the housing whereby to vary the amount of projection of the ball portion through the aperture, as determined by the abutment means, and thus the distance between the end face and the substrate surface, whereby to enable the thickness of the applied layer of adhesive to be varied.
- an additional advantage is thus created over and above the devices referred to above as forming part of the prior art.
- the nozzle housing and support are threadedly secured together.
- positioning means e.g. a type of ball-and-detent arrangement, is preferably provided for determining the relative position of the nozzle housing and support along the direction of adhesive flow and for maintaining them in positionally adjusted condition.
- an accurately controlled layer of adhesive can be applied, selected for its thickness by the operator according to the needs of the particular case, using a doctor member which is held spaced from the substrate surface so that any risk of damage to the doctor member is minimised, if not indeed eliminated, and which in any event is made of a relatively durable material.
- an apparatus for applying adhesive progressively on the surface of a substrate along a selected path comprising a support for the substrate, a support for supporting an adhesive applicator device in accordance with the present invention as set out in the preceding paragraphs, and drive means for effecting relative movement under programmed control along three coordinate axes between the substrate support and the applicator device support whereby to cause the applicator device to traverse the substrate surface lengthwise, widthwise and heightwise along the selected path, wherein the applicator device support comprises a holder for the device, said holder being supported for pivotal movement about a first axis extending transversely of the substrate surface and about a second axis extending lengthwise of the substrate surface, said first.
- the applicator device in accordance with the present invention is particularly suited to automatic control in order to ensure that the doctoring of the thickness of the adhesive layer is closely controlled.
- the apparatus in accordance with the present invention has, in addition to an operating mode in which adhesive is applied by the applicator device to a substrate surface, also a path-determining mode of operation, in which a programmed instruction is created for the selected path under operator control by determining a succession of points along the path, each point being stored in the form of digitised coordinate axis values for the three coordinate axes, together with digitised values in respect of the angular disposition of the device about each of the first and second axes at each point.
- the angular disposition of the device is varied to ensure that the longitudinal centre line of the device extends normal, or substantially normal, to the substrate surface at the point of engagement of the ball therewith and corresponding digitised values are stored, and in controlling the movement of the device in the operating mode the digitised values are modulated according to the desired angle of the longitudinal centre line of the device to said normal.
- the angle at which the longitudinal centre line of the device is maintained to the normal to the substrate surface is preferably fixed.
- this angle may be desirable that this angle be varied during the traversing of the device along the selected path, according to whether different bonding criteria are applicable at different sections of the substrate surface.
- the applicator device has a nozzle housing which can "float" relative to the tool holder, that is to say excessive pressure applied to the ball upon engagement with the substrate surface is accommodated by sliding movement of the nozzle housing bodily in relation to the tool holder, so that any irregularities in the substrate surface to be coated can be accommodated.
- the device in accordance with the present invention on the other hand, such a ' floating arrangement is not possible and consequently, in order to accommodate any irregularities in the substrate surface, conveniently the tool holder is itself supported for movement in a direction towards and away from the substrate support relative to its mounting; more particularly, the tool holder is supported on a four-bar linkage arrangement. In this way the amount of lateral displacement of the device in effecting such movement towards and away from the substrate support is minimised so as not to affect detrimentally to any significant extent the following of the selected path, even where irregularities occur.
- Fig. 1 is a fragmentary view in side elevation of a tool support arrangement forming part of the apparatus in accordance with the present invention and for supporting an adhesive applicator device in accordance with the invention
- Fig. 2 is a section view showing details of the adhesive applicator device itself
- Fig. 3 is a fragmentary view, in section, of a nozzle housing of the applicator device but with its position adjusted to increase the thickness of a layer of adhesive applied thereby.
- the apparatus in accordance with the invention thus comprises a base (10) supporting by a bracket (12), a pivot shaft (14) about which a support (16) for a shoe support (18) can pivot.
- the shoe support is arranged to support a shoe S, bottom uppermost, with the toe end thereof facing towards the front of the machine, i.e. towards the operator.
- the base (10) supports a support column structure (22) carrying a casting (24) on which is supported, for pivotal movement about a vertical axis, a support casting 34 having two upstanding lugs 32 between which tool supporting means generally designated 26 is supported for pivotal movement about a horizontal axis 31.
- the apparatus further comprises a first stepping motor (144) mounted on the base (10) and effective to take place about the horizontal axis provided by the shaft (14) (X-axis movement).
- a second stepping motor (84) is provided, carried by the casting (24) and effective to cause pivotal movement of the support casting 34 about its vertical axis (Y-axis movement).
- a third stepping motor (122 described in EP-A-0 043 645) is supported by the support casting 34, rearwardly of its vertical pivot, to cause it, and thus the tool supporting means 26 supported thereby, to pivot about its horizontal axis 31 (X-axis movement) .
- the X-, Y- and Z- axes represent three coordinate axes along which a tool supported by the tool supporting means 26 can be moved under the action of the three stepping motors (constituting drive means of the apparatus).
- the tool supporting means 26 comprises a housing (650) mounted for pivotal movement about said horizontal axis (31). From a forward face of the housing projects a hollow tubular arm 652 within which is accommodated, for rotational movement therein, a support rod 654. At the forward end of said rod is a plate 656 supporting two forwardly projecting arms 658, which are spaced apart widthwise of the apparatus and on each of which is mounted, for pivotal movement, a pair of parallel links 660, 662 which are connected, at their upper ends, by an angular support plate member 664'.
- the links 660, 662 together with the plate 664 and arms 658 thus comprise a first parallel linkage arrangement of the tool supporting means 26.
- a further support plate 666' the limit position for anti- clockwise (viewing Fig. 1) movement of which is determined by a plate 664 ⁇ formed as an extension on the support plate 664'.
- a further link 667 is pivotally connected to the link 660, at an intermediate position along the length thereof, and at their forward ends the plate 666' and link 667 are pivotally connected to a block 668 forming part of a tool holder generally designated 670.
- the support plate 666' and the link 667, together with the link 660 and the block 668 constitute a second parallel linkage arrangement of the tool supporting means 26.
- the first and second parallel linkage arrangements are so arranged that, with the support plate 666' in contact with the plate 664a, the tool holder 670 is caused to pivot about a transverse axis which passes through a point P, through which point also passes the axis (shown in chain-dot line in Fig. 1) of the support rod 654.
- a longitudinal centre line thereof also shown in chain-dot line in Fig. 1 also passes through said point P.
- the point P represents a height datum of the apparatus in a desired relationship with which the bottom of a shoe S supported by the shoe support 18 can be positioned when supported in the shoe support by toe support means 470 and a heel support and heel end clamping arrangement 720.
- the heel support and heel end clamping arrangement is shown in Fig. 1 with various details omitted; for further details reference should be made to GB-A-2 077 090.
- the second parallel linkage arrangement of the tool supporting means 26 enables the tool holder 670 to move heightwise relative to the height datum represented by the point P, without varying the angular inclination of the tool supported thereby.
- the links 662 each have an extension 674' carrying a transverse rod 675 to which is pivotally connected a forward end of a push rod 676, the rearward end of which is connected to actuator means for effecting fore-and-aft movement thereof (as described in detail in EP-A-0 351 993).
- actuator means for effecting pivotal movement of the tool holder about the axis of the support rod 654.
- further actuator means is a provided, again as described in EP-A-0 351 993.
- the block 668 • of the tool holder 670 comprises a base plate and side cheeks, and the tool itself is secured to the underside of the base plate.
- the tool thus comprises a mounting block 722 to which is secured a heated body 724 having at its lower end a projecting portion 726 which is of reduced diameter and is threaded to receive thereon a nozzle housing 728.
- the nozzle housing may be made of any suitable rigid, durable material, which also has good thermal conductivity e.g. stainless steel.
- a central passage 730 which terminates, at its lower end, in a central aperture 732 formed in an end face 734 of the nozzle housing 728, and the upper end of which accommodates a block 736 having a coaxial central passageway 738 which is open at its upper end.
- the end face 734 of the nozzle housing is dished so as to provide for a reservoir of adhesive supplied along the passageway 730.
- the tool For controlling the flow of adhesive along said passageway, furthermore, as also in the case of the tool of EP-A-0 351 993, the tool comprises a ball 740 which is so dimensioned as to be captive within the nozzle housing but able to project from the central aperture 732 formed in the end face 734. Moreover, spring means 742 is provided for urging the ball 740 against the rim of the aperture 732 so as to form a seal therewith, thus preventing the flow of adhesive from the nozzle housing.
- abutment means 744 provided on the lower end of the projection 726 of the heated body 724.
- the abutment means 744 comprises a plurality of castellations which provide an abutment surface for the ball while nevertheless allowing the passage of adhesive along the passageway 730.
- the nozzle housing 728 is so arranged in relation to the abutment means 744 that a portion of the ball will always project from the central aperture 732 beyond the end face 734 when a rearward face of the ball is in engagement with the abutment means.
- the end face 734 acts as a doctor blade, regardless, by reason of its annular configuration, of the direction of movement between the end face and a substrate, e.g. a shoe bottom, to which adhesive is being applied.
- the thickness of the applied layer moreover, will of course be determined by the relationship of the projecting portion of the ball 740 with the end face 734.
- the nozzle housing 728 is rotated, through its threaded engagement with the projecting portion 726 of the body 724 and as it so rotates the nozzle housing is wound up or down in relation to the abutment means 744, thereby varying the relationship between the end face and the abutment means and thus the amount by which the ball 740 will project beyond the end face 734 when in engagement with said means.
- suitable positioning means is provided; in the case of the apparatus now being described said means comprises a leaf spring 746, having a semi-spherical end portion, and a plurality of detents 748 arranged around the periphery of the outer surface of the nozzle housing 728, is provided, said means thus serving to indicate the positions to which the nozzle housing can be moved and also to maintain it in its adjusted position.
- a suitable heater is provided, e.g. in the form of an outer casing 750; other forms of heating, e.g. internal cartridge heaters, may also be contemplated within the scope of this invention.
- a canister 752 which is supported in the tool holder 670.
- side supports 754 (Fig. 1) are provided extending upwardly from the side cheeks of the block 668 and a top plate 756, which can be clamped onto an upper end of the canister 752 by means of spring clamps 758 is provided for holding the canister in position.
- a heated plate 760 (Fig. 2) carried by a block 762 threadedly secured to the block 722 and arranged within the passage 730 formed in the latter, the block 762 itself being provided with a central passage which accommodates the upper end of the block 736.
- An 0-ring 764 serves to seal the plate 760 and block 762.
- the adhesive used is preferably moisture- curable, and consequently requires to be maintained in a sealed can which should only be opened when the can is placed in the tool holder.
- the upper end of the block 736 projects beyond the plate 760 and terminates in a piercing device 766 which can pierce the end plate of the canister 752 progressively as the latter is clamped firmly in position.
- the piercing device causes a flap 752a ⁇ to be created which is not severed from the end face of the canister, but rather is folded back so as not to interfere with the flow of adhesive into the central aperture of the block 736.
- pressure is applied to the adhesive at the upper end thereof, e.g. by a compressed air system.
- a remote source of adhesive under pressure may be provided and connected to the upper end of the passageway 738 in the block 736 by a suitable hose; the hose would of course be heated.
- the apparatus has both an operating mode and a path-determining mode.
- the operator can, by e.g. a joystick control or cursor control (not shown), determine the path to be followed by the tool along the shoe bottom (or other substrate surface), at the same time determining the necessary angle of tilt both about the transverse axis and also the axis of the rod 654 and also the heightwise position of the tool support, thus to ensure that the tool is correctly positioned in relation to the shoe bottom (or substrate surface) at all times during the operating cycle.
- the adjustment of the angular disposition on the tool will be achieved by software. More particularly, in the path-determining mode the tool is moved progressively from selected point to selected point along the shoe bottom (substrate surface), in a manner generally as described in US-A-4 541 054, and the coordinate axis values and other values relating to the angular disposition of the tool are stored in digitised form for each point, these values constituting collectively a set of data which can then be filed and recalled for controlling the movement of the tool relative to the shoe bottom (substrate surface) in the operating mode of the apparatus.
- a layer of adhesive can be applied to the shoe bottom (substrate surface) with an accurately controlled thickness, usually (but not necessarily) a uniform thickness along the length of the layer.
- relatively thin layers e.g. in the order of 0.75 to 2.00mm, can be applied in this way.
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- Coating Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95906429A EP0742687A1 (en) | 1994-02-03 | 1995-01-26 | Adhesive applicator device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9402034.4 | 1994-02-03 | ||
GB9402034A GB9402034D0 (en) | 1994-02-03 | 1994-02-03 | Adhesive applicator device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995020889A1 true WO1995020889A1 (en) | 1995-08-10 |
Family
ID=10749769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1995/000149 WO1995020889A1 (en) | 1994-02-03 | 1995-01-26 | Adhesive applicator device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0742687A1 (en) |
GB (1) | GB9402034D0 (en) |
WO (1) | WO1995020889A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH453133A (en) * | 1966-07-07 | 1968-05-31 | United Shoe Machinery Corp | Device for pinching shoe end parts with successively working shaft molding, adhesive application device and means for pushing over the lasting edge of an upper |
EP0102765A1 (en) * | 1982-08-20 | 1984-03-14 | British United Shoe Machinery Limited | Applicator nozzle |
US4541054A (en) * | 1980-06-10 | 1985-09-10 | Usm Corporation | Determining an operating path of a tool in relation to a three-dimensional surface of a workpiece |
EP0351993A2 (en) * | 1988-07-20 | 1990-01-24 | British United Shoe Machinery Limited | Machine for performing a progressive operation on marginal portions of a shoe in the manufacture thereof |
EP0588054A1 (en) * | 1992-09-17 | 1994-03-23 | International Shoe Machine Corporation | Method for applying adhesive and coating device |
-
1994
- 1994-02-03 GB GB9402034A patent/GB9402034D0/en active Pending
-
1995
- 1995-01-26 WO PCT/GB1995/000149 patent/WO1995020889A1/en not_active Application Discontinuation
- 1995-01-26 EP EP95906429A patent/EP0742687A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH453133A (en) * | 1966-07-07 | 1968-05-31 | United Shoe Machinery Corp | Device for pinching shoe end parts with successively working shaft molding, adhesive application device and means for pushing over the lasting edge of an upper |
US4541054A (en) * | 1980-06-10 | 1985-09-10 | Usm Corporation | Determining an operating path of a tool in relation to a three-dimensional surface of a workpiece |
EP0102765A1 (en) * | 1982-08-20 | 1984-03-14 | British United Shoe Machinery Limited | Applicator nozzle |
EP0351993A2 (en) * | 1988-07-20 | 1990-01-24 | British United Shoe Machinery Limited | Machine for performing a progressive operation on marginal portions of a shoe in the manufacture thereof |
EP0588054A1 (en) * | 1992-09-17 | 1994-03-23 | International Shoe Machine Corporation | Method for applying adhesive and coating device |
Also Published As
Publication number | Publication date |
---|---|
EP0742687A1 (en) | 1996-11-20 |
GB9402034D0 (en) | 1994-03-30 |
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