EP3487348B1 - Apparatus and process for spraying glue on shoe components - Google Patents

Apparatus and process for spraying glue on shoe components Download PDF

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Publication number
EP3487348B1
EP3487348B1 EP17778365.1A EP17778365A EP3487348B1 EP 3487348 B1 EP3487348 B1 EP 3487348B1 EP 17778365 A EP17778365 A EP 17778365A EP 3487348 B1 EP3487348 B1 EP 3487348B1
Authority
EP
European Patent Office
Prior art keywords
glue
shoe
shielding element
nozzle
jet
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.)
Active
Application number
EP17778365.1A
Other languages
German (de)
French (fr)
Other versions
EP3487348A1 (en
Inventor
Tommaso Sestini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robot System Automation Srl
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Robot System Automation Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robot System Automation Srl filed Critical Robot System Automation Srl
Publication of EP3487348A1 publication Critical patent/EP3487348A1/en
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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
    • A43D25/183—Devices for applying adhesives to shoe parts by nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/28—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
    • B05B13/0457—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles specially designed for applying liquid or other fluent material to 3D-surfaces of the articles, e.g. by using several moving spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material

Definitions

  • the present invention regards the technical field of the machines for the footwear industry and relates to an apparatus for spraying glue and a process for bonding shoes.
  • glue will be used to indicate any adhesive substance or mixture of substances usable to bond parts or components of a shoe.
  • glue is sprayed along a path that defines the junction/overlay line between the sole and the upper.
  • ES 2 320 945 A1 discloses an apparatus for spraying glue to a portion of a shoe and discloses that said apparatus includes a shielding element and means to mechanically clean said shielding element.
  • the bonding of shoe portions involves the use of spray glue dispensers which direct a glue jet on the portions of the footwear to be glued.
  • the glue distribution needs to be performed with great precision and the higher is the quality of the footwear, the higher is the degree of precision required for gluing. In practice, high-quality footwear must be free from imperfections due to incorrect glue distribution.
  • the bonding process is extremely simplified, accurate and effective; the productivity can be increased because the gluing speed is increased; it is possible to employ non-highly skilled operators, thanks to the operational simplicity of the apparatus; the apparatus keeps its characteristics unaltered even after prolonged periods of use; the apparatus is simple from a constructive point of view and requires limited maintenance.
  • the present invention relates to an apparatus (1) for spray-dispensing glue on a shoe portion.
  • the shoe portion (100) is the upper of a shoe to be manufactured.
  • the apparatus (1) can be used to spray glue on the shoe portion (100).
  • the apparatus (1) comprises a support structure (10) which is fixed to a plate (11), which is provided with connection and / or supply means (12) enabling it to be used in a unit for forming footwear.
  • the structure (10) comprises a sliding stem (13) supporting a tool holder (14) on which the active components of the apparatus (1) are arranged as further disclosed below.
  • the apparatus (1) comprises a first nozzle (2), that is supported by a corresponding supporting body (22), and is capable of spraying a glue jet (20) towards the shoe portion (100) to be treated.
  • a glue jet (20) towards the shoe portion (100) to be treated.
  • the apparatus (1) comprises a shielding element (3) and at least one second nozzle (4).
  • the shielding element (3) is supported by an arm (33) connected to the structure (10) so as to place the shielding element (3) in an area crossed by the glue jet (20) produced by the nozzle (2), the shielding element being positioned between the nozzle (2) and the portion of the footwear (100). As shown in Figs. 2 and 3 , the shielding element (3) can be positioned close to the shoe portion (100).
  • the shielding element (3) is capable of intercepting the glue jet (20) sprayed by the nozzle (2) to define a boundary line (30) for the glue distribution on said shoe (100).
  • the shielding element (3) forms a barrier that intercepts the glue jet (20) leaving a shoe area free from the glue beyond the path marked with (101) in the drawings. In this way, the sprayed glue covers only the part (102) on which it is to be applied.
  • the upper (100) is positioned as shown in Figs. 2 and 3 , said area free from glue is below line (101).
  • the path (101) is predetermined by the shoe designer.
  • the boundary line (30) is determined by the shielding element (3). In operation, the boundary line (30) overlaps the path (101).
  • the apparatus (1) has an additional nozzle (4) which faces the shielding element (3) and directs a pressurized fluid jet (40) towards the same shielding element (3) to interact with any glue residues present there.
  • a pressurized fluid jet (40) towards the same shielding element (3) to interact with any glue residues present there.
  • the shielding element (3) is always cleaned by any residues and the bonding process can proceed without drawbacks due to the glue accumulations that after a certain period of use would limit the function of the shielding element.
  • the additional nozzle (4) is preferably supplied with compressed air. For this reason the additional nozzle (4) is connected to a source (41) of compressed air.
  • the second nozzle may increase the air pressure for predetermined periods of time.
  • the nozzle (4) can emit very high pressure air jets, while maintaining a lower pressure in the other parts of the bonding cycle.
  • Another feature of the invention is the structure of the shielding element (3), which is made and / or coated with a low friction material.
  • the shielding element (3) can be coated, for example, with Teflon or any other low friction material, to interfere with the footwear material as little as possible.
  • edges of the distal end (31) of the shielding element (3) can also be rounded to overcome any superficial irregularities presented by the shoe (100).
  • the shielding element (3) can be concave, with the concavity facing the second nozzle (4).
  • the jet of compressed air emitted by the nozzle (4) is indicated by (40) and the reference (40A) indicates the part which is diverted by the shield element (3).
  • the apparatus (1) has one additional nozzle (4).
  • Other embodiments of the invention, which are not illustrated, may include a plurality of additional nozzles for directing multiple air flows towards the shielding element.
  • the present invention also relates to a method for gluing a shoe portion by means of a sprayed glue.
  • the method involves the use of a first nozzle (2) for spraying a glue jet (20) towards said shoe portion (100).
  • the process involves screening the shoe portion by means of a shielding element (3) for intercepting said glue jet (20) and defining a glue line (30) for the glue distribution on said shoe (100), and to direct a pressurized fluid jet (40) towards said shielding element (3) by means of at least one additional nozzle (4) to interact with any glue residues present therein.
  • the process may vary the pressure of the pressurized fluid (compressed air in the example) that forms the jet (40) emitted by the extra nozzle (4).

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

  • The present invention regards the technical field of the machines for the footwear industry and relates to an apparatus for spraying glue and a process for bonding shoes.
  • In the present description, the term glue will be used to indicate any adhesive substance or mixture of substances usable to bond parts or components of a shoe.
  • It is known the use of glue to join two or more parts of a shoe during its production. For example, for joining the upper to the sole, glue is sprayed along a path that defines the junction/overlay line between the sole and the upper.
  • ES 2 320 945 A1 discloses an apparatus for spraying glue to a portion of a shoe and discloses that said apparatus includes a shielding element and means to mechanically clean said shielding element.
  • The bonding of shoe portions involves the use of spray glue dispensers which direct a glue jet on the portions of the footwear to be glued.
  • The glue distribution needs to be performed with great precision and the higher is the quality of the footwear, the higher is the degree of precision required for gluing. In practice, high-quality footwear must be free from imperfections due to incorrect glue distribution.
  • To obtain a precise line of glue applied on the shoe portions to be joined, the latter is protected by an adhesive tape that defines a separation line between the glued part and the non-to glue part. At the end of the gluing process, the tape must be detached from the shoe portion which has been glued.
  • This type of intervention is related to the experience of the operator and results in a considerable loss of time. In other words, it is necessary to use specialized manpower for a relatively large period of time which may decrease the yield of the production process. Among the objects of the present invention is to eliminate the aforementioned drawbacks with an apparatus and a process as defined in the independent claims. Other features of the invention are the subject of the dependent claims.
  • Among the advantages of the present invention, the following can be listed: the bonding process is extremely simplified, accurate and effective; the productivity can be increased because the gluing speed is increased; it is possible to employ non-highly skilled operators, thanks to the operational simplicity of the apparatus; the apparatus keeps its characteristics unaltered even after prolonged periods of use; the apparatus is simple from a constructive point of view and requires limited maintenance.
  • These and further advantages and features of the present invention will be more and better understood by each branch technician from the following description and with the help of the accompanying drawings, given as a practical example of the invention, but not to be considered in a limitative sense in which:
    • Fig. 1 is a schematic side view with parts in see-through of a possible embodiment of an apparatus according to the invention;
    • Fig. 2 is a schematic side view with parts in see-through of the embodiment shown in Fig. 1,
    • in which the apparatus is represented in conjunction with a shoe being formed;
    • Fig. 3 is an enlarged detail of Fig. 2;
    • Fig. 4 is a front view of the apparatus in question;
    • Fig. 5 is a schematic lateral view of the apparatus, with portions removed according to the section line indicated by V-V in Fig. 4;
    • Fig. 6 shows schematically a possible example of conformation of the distal part of a shielding element that is part of the apparatus in question.
  • Referred to the accompanying drawings, the present invention relates to an apparatus (1) for spray-dispensing glue on a shoe portion. For example, as shown in the drawings, the shoe portion (100) is the upper of a shoe to be manufactured.
  • The apparatus (1) can be used to spray glue on the shoe portion (100). The apparatus (1) comprises a support structure (10) which is fixed to a plate (11), which is provided with connection and / or supply means (12) enabling it to be used in a unit for forming footwear. The structure (10) comprises a sliding stem (13) supporting a tool holder (14) on which the active components of the apparatus (1) are arranged as further disclosed below.
  • In particular, the apparatus (1) comprises a first nozzle (2), that is supported by a corresponding supporting body (22), and is capable of spraying a glue jet (20) towards the shoe portion (100) to be treated. By appropriately moving the nozzle (2) with respect to the shoe portion (100), i.e. by turning the shoe portion (100) on itself or turning the structure (10) around the shoe in a known manner, the glue is distributed around the shoe along a path (101) extending along the peripheral development (edge) of the shoe portion. The nozzle (2) itself is of the known type and it is connected to a corresponding glue supply circuit not described in further details because it is also known in the art.
  • Advantageously, the apparatus (1) comprises a shielding element (3) and at least one second nozzle (4).
  • The shielding element (3) is supported by an arm (33) connected to the structure (10) so as to place the shielding element (3) in an area crossed by the glue jet (20) produced by the nozzle (2), the shielding element being positioned between the nozzle (2) and the portion of the footwear (100). As shown in Figs. 2 and 3, the shielding element (3) can be positioned close to the shoe portion (100).
  • The shielding element (3) is capable of intercepting the glue jet (20) sprayed by the nozzle (2) to define a boundary line (30) for the glue distribution on said shoe (100). In practice, the shielding element (3) forms a barrier that intercepts the glue jet (20) leaving a shoe area free from the glue beyond the path marked with (101) in the drawings. In this way, the sprayed glue covers only the part (102) on which it is to be applied. When the upper (100) is positioned as shown in Figs. 2 and 3, said area free from glue is below line (101). The path (101) is predetermined by the shoe designer. The boundary line (30) is determined by the shielding element (3). In operation, the boundary line (30) overlaps the path (101).
  • The apparatus (1) has an additional nozzle (4) which faces the shielding element (3) and directs a pressurized fluid jet (40) towards the same shielding element (3) to interact with any glue residues present there. In this way, the shielding element (3) is always cleaned by any residues and the bonding process can proceed without drawbacks due to the glue accumulations that after a certain period of use would limit the function of the shielding element.
  • The additional nozzle (4) is preferably supplied with compressed air. For this reason the additional nozzle (4) is connected to a source (41) of compressed air.
  • The use of air as a pressurized fluid has proved to be a very suitable choice because the compressed air has a high cleaning effect and, in addition, it is possible to use the compressed air system normally provided in a machine for making footwear.
  • For a greater cleaning effect it can be foreseen that the second nozzle may increase the air pressure for predetermined periods of time. In practice, according to predetermined operative cycles or when a more intensive cleaning is appropriate, the nozzle (4) can emit very high pressure air jets, while maintaining a lower pressure in the other parts of the bonding cycle.
  • Another feature of the invention is the structure of the shielding element (3), which is made and / or coated with a low friction material. The shielding element (3) can be coated, for example, with Teflon or any other low friction material, to interfere with the footwear material as little as possible.
  • The edges of the distal end (31) of the shielding element (3) can also be rounded to overcome any superficial irregularities presented by the shoe (100).
  • To better convey the flow emitted by the second nozzle (4), the shielding element (3) can be concave, with the concavity facing the second nozzle (4). In Fig.5, the jet of compressed air emitted by the nozzle (4) is indicated by (40) and the reference (40A) indicates the part which is diverted by the shield element (3).
  • In the attached drawings, the apparatus (1) has one additional nozzle (4). Other embodiments of the invention, which are not illustrated, may include a plurality of additional nozzles for directing multiple air flows towards the shielding element.
  • The present invention also relates to a method for gluing a shoe portion by means of a sprayed glue. The method involves the use of a first nozzle (2) for spraying a glue jet (20) towards said shoe portion (100). Advantageously, the process involves screening the shoe portion by means of a shielding element (3) for intercepting said glue jet (20) and defining a glue line (30) for the glue distribution on said shoe (100), and to direct a pressurized fluid jet (40) towards said shielding element (3) by means of at least one additional nozzle (4) to interact with any glue residues present therein.
  • According to the present method, it is advantageous to use compressed air for the jet of said at least one additional nozzle (4).
  • In addition, the process may vary the pressure of the pressurized fluid (compressed air in the example) that forms the jet (40) emitted by the extra nozzle (4).

Claims (9)

  1. Apparatus for dispensing a spray of glue on a portion of a shoe, apparatus comprising a first nozzle (2) adapted to spray a jet of glue (20) towards said portion of shoe (100), wherein said apparatus (1) comprises a shielding element (3), adapted to intercept said jet of glue (20) to define a limit line (30) for the distribution of the glue on said shoe (100), the apparatus (1) characterised in that it further comprises at least one additional nozzle (4) facing said shielding element (3) and adapted to direct a jet of fluid under pressure (40) towards the same shielding element (3) to interact with any glue residue present therein.
  2. Apparatus according to claim 1, characterized in that said fluid is compressed air and that said at least one additional nozzle (4) is connected to a compressed air source (41).
  3. Apparatus according to claim 1 and/or 2, characterized in that said shielding element (3) is realized and/or coated with a low friction coefficient material.
  4. Apparatus according to one or more of the preceding claims, characterized in that distal end edges (31) of said shielding element (3) are rounded to better overcome any surface non-uniformities presented by the shoe (100).
  5. Apparatus according to one or more of the preceding claims, characterized in that said shielding element (3) is shaped concave, with the concavity facing said second nozzle (4).
  6. Apparatus according to one or more of the preceding claims, characterized in that said first nozzle (2), said shielding element (3) and said second nozzle (4) are supported by a structure (14) sliding along a stem (13) so as to vary the distance between the apparatus (1) and the shoe (100).
  7. A process for bonding a portion of shoe by the dispensing of sprayed glue by means of a first nozzle (2) for spraying a jet of glue (20) towards said shoe portion (100), the process comprising the step of shielding said portion of the shoe by means of a shielding element (3) to intercept said jet of glue (20) and define a limit line (30) for the distribution of glue on said shoe (100), the process being characterised in that, it comprises the step of directing towards said shielding element (3), by means of at least one additional nozzle (4), a pressurized fluid jet (40) to interact with any glue residue present therein.
  8. Process according to claim 7, characterized in that compressed air is used for the jet of said at least one additional nozzle (4).
  9. Process according to claim 7 and/or 8, characterized in that the pressure of the pressurized fluid of the jet of said at least one additional nozzle (4) is varied during the process.
EP17778365.1A 2016-07-25 2017-07-19 Apparatus and process for spraying glue on shoe components Active EP3487348B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000077498A IT201600077498A1 (en) 2016-07-25 2016-07-25 Apparatus and procedure for gluing shoes.
PCT/IT2017/000148 WO2018020526A1 (en) 2016-07-25 2017-07-19 Apparatus and process for spraying glue on shoe components

Publications (2)

Publication Number Publication Date
EP3487348A1 EP3487348A1 (en) 2019-05-29
EP3487348B1 true EP3487348B1 (en) 2020-07-15

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ID=57737898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17778365.1A Active EP3487348B1 (en) 2016-07-25 2017-07-19 Apparatus and process for spraying glue on shoe components

Country Status (6)

Country Link
EP (1) EP3487348B1 (en)
CN (1) CN109688861B (en)
IT (1) IT201600077498A1 (en)
MX (1) MX2019000480A (en)
PT (1) PT3487348T (en)
WO (1) WO2018020526A1 (en)

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US4098632A (en) * 1975-10-01 1978-07-04 Usm Corporation Adhesive process
JP2005034782A (en) * 2003-07-17 2005-02-10 Sony Corp Washing device and washing method
ES2320945B1 (en) * 2006-05-10 2010-04-06 Vicente Anton Bru METHOD FOR APPLYING TAIL TO A FLOOR.
JP4905205B2 (en) * 2007-03-23 2012-03-28 パナソニック株式会社 Nozzle device and sanitary washing device using it
IT1393590B1 (en) * 2009-04-02 2012-04-27 Stemma Srl METHOD FOR THE PRODUCTION OF WATERPROOF AND WATERPROOF SHOES.
WO2013123662A1 (en) * 2012-02-23 2013-08-29 欧利速精密工业股份有限公司 Sole adhesive automated spraying system and spraying method therefor
CN203936073U (en) * 2014-03-12 2014-11-12 何选民 Dispensing needle head cleaning device
US9565900B2 (en) * 2014-05-16 2017-02-14 Nike, Inc. Shoe sole portion painting system
CN104785472A (en) * 2015-04-29 2015-07-22 深圳市智立方自动化设备有限公司 Adhesive dispensing needle cleaning device
CN104841666B (en) * 2015-05-11 2017-01-11 东莞市沃德精密机械有限公司 Automatic residual adhesive cleaning method
CN205380926U (en) * 2016-03-03 2016-07-13 湖北华丽包装有限公司 Single thermostatic control of rubberizing system made of baked clay quick -witted of card circle formula and on line from belt cleaning device

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
EP3487348A1 (en) 2019-05-29
PT3487348T (en) 2020-10-07
MX2019000480A (en) 2019-06-10
BR112019000568A2 (en) 2019-04-24
CN109688861B (en) 2022-03-15
CN109688861A (en) 2019-04-26
IT201600077498A1 (en) 2018-01-25
BR112019000568A8 (en) 2023-05-02
WO2018020526A1 (en) 2018-02-01

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