EP0568502A2 - Vorrichtung zur Abgabe eines Klebstoffes für Schuhklebemaschinen - Google Patents

Vorrichtung zur Abgabe eines Klebstoffes für Schuhklebemaschinen Download PDF

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Publication number
EP0568502A2
EP0568502A2 EP93830140A EP93830140A EP0568502A2 EP 0568502 A2 EP0568502 A2 EP 0568502A2 EP 93830140 A EP93830140 A EP 93830140A EP 93830140 A EP93830140 A EP 93830140A EP 0568502 A2 EP0568502 A2 EP 0568502A2
Authority
EP
European Patent Office
Prior art keywords
brush
coating head
closure member
glue
base unit
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.)
Withdrawn
Application number
EP93830140A
Other languages
English (en)
French (fr)
Other versions
EP0568502A3 (en
Inventor
Celestino Cucchetti
Piero Cucchetti
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.)
Ormac SpA
Original Assignee
Ormac SpA
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 Ormac SpA filed Critical Ormac SpA
Publication of EP0568502A2 publication Critical patent/EP0568502A2/de
Publication of EP0568502A3 publication Critical patent/EP0568502A3/en
Withdrawn legal-status Critical Current

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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

Definitions

  • the present invention relates to a glue dispensing device for shoe cementing machines.
  • known devices generally comprising a coating head provided with a rotating brush for better penetration of the glue and a delivery valve located immediately upstream of the coating head, do not enable the glue flow to stop immediately at the end of each gluing operation, but afford glue drippings and leakages even to a great extent.
  • the coating brushes are of cup-shaped conformation and are provided with an inner hollow space into which an adhesive material flows from a feed duct connected to the delivery valve.
  • the cited hollow space after the delivery valve has been closed is still filled with an important amount of glue and therefore as soon as the element to be cemented, a shoe vamp for example, is moved away from the brush this glue drops.
  • the technical task underlying the present invention is to provide a glue dispensing device for shoe cementing machines capable of substantially eliminating the above drawbacks.
  • a glue dispensing device completely enabling any glue drop or dripping to be prevented, also when a water-based glue is used, at the end of a cementing operation after the component to be cemented has been moved away from the coating brush.
  • a glue dispensing device for shoe cementing machines of the type comprising a coating head provided with a rotating brush for spreading said adhesive material, which is characterized in that it comprises: a base unit, a support element for said brush slidably engaged to said base unit, in an axial translation direction, and spring means acting on said support element and adapted under operating conditions to keep said brush in a substantially flattened conformation against a component to be cemented.
  • the glue dispensing device in accordance with the invention is generally identified by reference numeral 1.
  • It comprises a coating head 2, a delivery valve and a tank 4 adapted to keep the glue to be dispensed under pressure.
  • a bearing structure 5 supports both the coating head 2 and the delivery valve such as to keep these two components spaced apart from each other.
  • One conveying pipe 6 enables the adhesive material to be transferred from the delivery valve to the coating head 2 and a second conveying pipe 7 enables the adhesive material to flow from the tank 4 to the delivery valve 3.
  • the coating head 2 comprises a base unit 8 supported by bearings 9 and set in rotation by a motor 10 through transmission-gear means 11, a belt for example, comprising one pulley 12 integral with the base unit 8 and a second pulley 13 integral with the motor 10.
  • the base unit 8 has a slide bushing 14 adapted to slidably engage in a translation direction coaxial with its central axis 14a, a support element 15 defined by a hollow cylinder.
  • the spring 20 is such set that it enables the brush 17 to take a substantially flattened conformation, shown in Fig. 3, when a component to be cemented, a vamp supported by a shoe last 21 for example, is thrusted against the brush 17 for being coated with glue by the brush itself.
  • the delivery valve which is part of the device of the invention too, comprises a hollow main body 22 provided with an inlet port 23 to which the second pipe 7 issuing from the tank 4 can be engaged, and an outlet port 24 to which the first conveying pipe 6 is connected.
  • a closure member 25 provided with an intercepting plate 25a and an actuating shank 25b is arranged between the inlet port 23 and outlet port 24, along with a sealing seating 26, both made of a material resistant to the adhesive material, the first for example being made of an aluminium alloy and the second of Teflon.
  • the closing member 25 and sealing seating 26 define a first chamber 27 immediately downstream of the inlet port 23 and a second chamber 28 immediately upstream of the outlet port 24.
  • the second chamber has a variable volume and it forms a suction chamber because on its side opposite the intercepting plate 25a it is bounded by a flexible diaphragm 29 engaged to the shank 25b of the closure member 25 by a nut 30 and a threaded end 31a of an actuating rod 31 which is screwed down in the shank 25b itself.
  • the suction chamber 28 has its maximum volume when the plate 25a is in a closing contact with the sealing seating 26, that is the flexible diaphragm is in an expanded condition, and has its minimum volume that is the flexible diaphragm 29 is in a non-expanded condition when the plate is spaced apart from the sealing seating 26, that is the first chamber 27 is in communication with the second suction chamber 28.
  • actuating rod 31 of the closure member 25 is part of actuation means 32 comprising a fluid-operated driving cylinder 33, a pneumatic cylinder for example, associated with the main body 22, inside which a plunger 34 integral with the rod 31 reciprocates.
  • FIG. 6 An alternative embodiment of the delivery valve seen in Fig. 5 is shown in fig. 6.
  • Fig. 6 corresponding elements have been allocated identical reference numerals.
  • the inlet port 23 and outlet port 24 are interchanged as compared to the illustration of Figs. 1, 4 and 5.
  • the closure member 25 consists of a cylindrical piston sliding in the sealing seating 26 of cylindrical shape too, formed in the hollow main body 22.
  • the closure member 25 has an axial hole 35 opening towards the second chamber 28 defined at the outlet port 24, and a third chamber 36 formed at the side surface of the closure member itself and put in fluid communication with said axial hole 35.
  • the third chamber 3 6 consists of an annular groove.
  • the closure member 25 On the opposite side with respect to the axial hole 35 the closure member 25 is connected to the actuating rod 31 integral with the plunger 34 of the fluid-operated driving cylinder 33.
  • the third chamber 36 is in alignment with the inlet port 23 which is thereby brought into fluid communication with the outlet port 24 to enable glue dispensing.
  • the second chamber 28 exhibits its minimum volume.
  • the closure member 25 closes the inlet port 23 and, at the same time, causes a volume increase in the second chamber 28 in which a vacuum is therefore produced, so that a suction action is exerted on the glue.
  • a vamp for example, with glue
  • the component is pushed against the brush 17, against the action of the spring 20, so that the brush is completely flattened.
  • the hollow space 17a which is present when the brush 17 is not submitted to a compressive action, is practically reduced to a volume of zero value.
  • the motor 10 sets in rotation the base unit 8 and support element 15 and, as a result, the brush 17 too rotates about the axis 14a.
  • the closure member 25 of the delivery valve 3 is positioned so that glue can be dispensed from the outlet port 25 (Fig. 5); said glue, through the duct 18, reaches the brush 17 bristles.
  • the brush is flattened by the force of substantially constant value exerted by the compression spring 20, it exhibits a constant diameter even on varying of the distance of the surface of the component to be cemented from the coating head 2. Therefore the glue-coated band obtained by the controlled movements to which the shoe last 21 is subjected, is of strictly uniform width.
  • the intercepting plate 25a is brought into contact with the sealing seating 26 by admitting air into a duct 35 opening into the driving cylinder 33 and the interruption of the glue flow brings about the expansion of the second chamber 28 because the elastic diaphragm 29 is deformed in a direction away from the plate 25a.
  • the chamber 28 creates a vacuum downstream of the outlet port 24, that is a suction action takes place which is promoted by the presence of the first conveying pipe 6.
  • the delivery valve 3 also acts as a safety valve.
  • the adhesive material under pressure present in the first chamber 27 presses the plate 25a against the sealing seating 26, thereby closing the passage to the outlet port 24 and preventing admission of further adhesive material to the chamber 28.
  • the plunger 34 is pushed to its top dead centre so that the third chamber 36, and consequently the axial hole 35, brings the inlet port 23 into fluid communication with the outlet port 24 (see Fig. 6).
  • the plunger 34 When the glue dispensing operation has been completed, the plunger 34 is brought to its bottom dead centre so that the third chamber 36 is out of alignment with respect to the inlet port 23 and, as a result, the closure member 25 acts on the inlet port closing it.

Landscapes

  • Coating Apparatus (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
EP19930830140 1992-04-28 1993-04-02 Glue dispensing device for shoe cementing machines Withdrawn EP0568502A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI921002 1992-04-28
ITMI921002A IT1254935B (it) 1992-04-28 1992-04-28 Dispositivo di erogazione di collante per macchine incollatrici di calzature.

Publications (2)

Publication Number Publication Date
EP0568502A2 true EP0568502A2 (de) 1993-11-03
EP0568502A3 EP0568502A3 (en) 1993-12-08

Family

ID=11363086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930830140 Withdrawn EP0568502A3 (en) 1992-04-28 1993-04-02 Glue dispensing device for shoe cementing machines

Country Status (2)

Country Link
EP (1) EP0568502A3 (de)
IT (1) IT1254935B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800001300A1 (it) * 2018-01-18 2019-07-18 Cerim S R L Dispositivo di incollaggio per suole di calzatura e macchina di incollaggio con tale dispositivo

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860985A (en) * 1973-06-11 1975-01-21 Compo Ind Inc Adapter for use in shoe making
FR2246234A1 (de) * 1973-10-04 1975-05-02 Usm Corp
EP0276944A2 (de) * 1987-01-30 1988-08-03 British United Shoe Machinery Limited Klebstoffauftragevorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860985A (en) * 1973-06-11 1975-01-21 Compo Ind Inc Adapter for use in shoe making
FR2246234A1 (de) * 1973-10-04 1975-05-02 Usm Corp
EP0276944A2 (de) * 1987-01-30 1988-08-03 British United Shoe Machinery Limited Klebstoffauftragevorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800001300A1 (it) * 2018-01-18 2019-07-18 Cerim S R L Dispositivo di incollaggio per suole di calzatura e macchina di incollaggio con tale dispositivo

Also Published As

Publication number Publication date
ITMI921002A0 (it) 1992-04-28
IT1254935B (it) 1995-10-11
ITMI921002A1 (it) 1993-10-28
EP0568502A3 (en) 1993-12-08

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