EP0030893B1 - Auftraggerät für geschmolzene Materialien, wie z.B. thermoplastische Klebstoffe - Google Patents

Auftraggerät für geschmolzene Materialien, wie z.B. thermoplastische Klebstoffe Download PDF

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Publication number
EP0030893B1
EP0030893B1 EP80401774A EP80401774A EP0030893B1 EP 0030893 B1 EP0030893 B1 EP 0030893B1 EP 80401774 A EP80401774 A EP 80401774A EP 80401774 A EP80401774 A EP 80401774A EP 0030893 B1 EP0030893 B1 EP 0030893B1
Authority
EP
European Patent Office
Prior art keywords
rod
gripping device
applicator
applicator according
stick
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80401774A
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English (en)
French (fr)
Other versions
EP0030893A1 (de
Inventor
René Barlogis
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.)
FRANCAISE D' AGRAFAGE INDUSTRIEL SOFRAGRAF Ste
Original Assignee
FRANCAISE D' AGRAFAGE INDUSTRIEL SOFRAGRAF Ste
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 FRANCAISE D' AGRAFAGE INDUSTRIEL SOFRAGRAF Ste filed Critical FRANCAISE D' AGRAFAGE INDUSTRIEL SOFRAGRAF Ste
Publication of EP0030893A1 publication Critical patent/EP0030893A1/de
Application granted granted Critical
Publication of EP0030893B1 publication Critical patent/EP0030893B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/0054—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the driving means for the material being pneumatic or hydraulic
    • B05C17/00543—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the driving means for the material being pneumatic or hydraulic comprising a piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/00526—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application
    • B05C17/0053—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application the driving means for the material being manual, mechanical or electrical
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17119—Feed type

Definitions

  • the present invention relates to devices, generally made in the form of guns and which are used to dispense, in small quantities, molten materials such as thermoplastics, for example glues, waxes, etc.
  • These devices which are commonly called “applicators”, include a heating chamber provided at one end with a dispensing nozzle and, at the other, with an inlet pipe in which a stick of material is engaged. to distribute.
  • this stick When this stick is inserted into the chamber, either by hand or by means of a suitable device, for example pneumatic or mechanical, it gradually melts, also acting as a piston to expel the molten material. through the dispensing nozzle.
  • a suitable device for example pneumatic or mechanical
  • the latter is generally fitted with a check valve.
  • the stick If the stick is not given the possibility of moving back a few millimeters in order to compensate for the expansion of the material, the latter, pressurized in the heating chamber, forces the check valve and leaves the nozzle in the form of a leak, what to avoid.
  • the main objective of the present invention is to remedy the drawbacks which have just been explained.
  • US-A-3774817 describes a molten material applicator, having a frame equipped with a heating chamber, itself provided with a dispensing nozzle and comprising an inlet pipe in which a stick of material can be engaged. to be dispensed so that it gradually penetrates into the heating chamber by pushing the molten material out of the nozzle, the inlet tubing being equipped with a clamping device, arranged so as to grip the stick.
  • the clamping device is moved back and forth by a suitable motor device, and it is arranged so as to push the stick little by little inside the chamber. heats up, each motor stroke being triggered by an appropriate trigger; any backward movement of the stick has its amplitude which is further limited by the engagement of the end of a leaf spring in the side wall of the stick; it should be noted that this leaf spring is not tensioned by the advance movement of the rod.
  • This prior patent therefore does not describe means making it possible to effectively prevent the pressurization of the heating chamber and the leakage of molten material out of the nozzle.
  • the molten material applicator according to the present invention also has a frame equipped with a heating chamber provided with a dispensing nozzle and comprising an inlet tube into which a stick of material to be dispensed can be engaged to make it penetrate. little by little in the heating chamber by pushing the molten material out of the nozzle, said inlet nozzle being equipped with a clamping device arranged so as to grip the stick; it is characterized in that the clamping device is arranged so as to be driven by the stick, against an elastic restoring force, when the stick advances, then to bring said stick back under the effect of the restoring force, when no push is no longer exerted on this rod.
  • the clamping device which is provided with the molten material applicator according to the present invention is recalled back when no thrust is exerted on the stick, over a distance which can reach several millimeters and which is sufficient to compensate for the expansion of the molten material and, even create a slight depression in the heating chamber, guaranteeing the tightness of the closure of the nozzle.
  • a pistol-shaped applicator comprises a frame 1 in the barrel of which is mounted a heating chamber 2, supplied with electric current by means of conductors which are did not represent so as not complicate the drawing and which are connected to a cord 3 emerging from the butt 4 of the frame.
  • the heating chamber ends, in a usual manner, by a dispensing nozzle 5 provided with a non-illustrated check valve and, at the rear, it is extended by a manifold.
  • inlet 6 which ends with a sleeve 7 made of a material which is poorly conductive of heat, for example a polytetrafluoroethylene (Teflon - registered trade mark). It is into this sleeve that the rods 8 of product to be dispensed are introduced, for example thermoplastic glue.
  • the sleeve 7 is provided with a collar 9 by which it abuts on a partition 10 of the frame, which it passes through without appreciable play.
  • the frame comprises a chamber 11 limited by a wall 12 that the rear end of the sleeve 7 passes through an orifice 13 in which said sleeve passes with clearance.
  • a pinching device 14 On the rear end of the sleeve 7 is threaded a pinching device 14. This device has a central portion which passes with little clearance in the orifice 13 and is provided with a flange 15 abutting on the internal face of the wall 12.
  • Said central portion is extended, in the chamber 11, by divergent fins 16, for example two in number and diametrically opposite.
  • divergent fins 16 for example two in number and diametrically opposite.
  • the central portion of the device 14 is extended by arms 17, for example also two in number, but offset by 90 ° with respect to the fins 16.
  • These arms 17 end in jaws 18 whose edges 19 are curved, as shown in FIG. 2, and located at rest on a circumference of diameter smaller than that of the rods 8.
  • edges 19 are bevelled so as to facilitate the introduction of the rods between the jaws but to cling to said rods when they tend to move back.
  • the pinching device 14 is preferably made of rigid and elastic synthetic material, for example polyamide.
  • This movement is however accompanied by a forward drive of the clamping device 14 whose jaws 18 grip the stick, drive which allows the elasticity of the fins 16.
  • the stick can however slide on the jaws 18 to sink in the heating chamber as the molten material is expelled through the nozzle 5.
  • the elastic fins 16 straighten up and make the device 14 move back with the stick, in the opposite direction to the arrow F, by a few millimeters.
  • This retraction of the stick compensates for the expansions and causes, in the heating chamber, a suction effect which prevents any untimely exit of molten material by the nozzle 5.
  • the stick is kept in the correct position at the inlet of the sleeve 7.
  • FIGS. 4 and 5 works in the same way as the embodiment which has just been described.
  • the clamping device 14 is this time produced in three parts, namely two half-shells 20 and a spring 21.
  • the half-shells 20 each have an arm 17 terminated by a jaw 18 with a bevelled edge 19, like the corresponding elements of the embodiment described above.
  • Their base 22 is pressed against the wall 12, in the chamber 11, under the effect of the spring 21, in order to ensure the tightening.
  • the spring 21 also abuts on the partition 10 and surrounds the sleeve 7.
  • a centering surface 23 is provided for the spring 21 at the rear of each of the half-shells 20.
  • the latter can be made of metal, by example a light alloy.
  • the elastic clamping device 14 can be adapted to applicators in which the sticks 8 are moved by an appropriate device and no longer by direct pushing by the user as in the examples previous.
  • the device 14 here in a single piece like that of FIGS. 1 to 3, is mounted, between the walls 10 and 12, in the chamber 11 of the frame, on the outlet pipe 6 of the heating chamber 2.
  • the arms 17 and the jaws 18 penetrate into the cylinder 25 of the pneumatic device which serves to advance the sticks 8.
  • This pneumatic device which is actuated using a push button 26, comprises, in the usual manner, an annular piston 27 which slides in the cylinder 25 and in which the stick 8 is engaged and gripped by so as to be pushed forward.
  • an opposing spring 33 centered by a boss 34 of the piston and which rests on the front wall 35 of the cylinder.
  • the device 14 returns to its normal place, making the rod move back, when the piston makes its return stroke under the effect of the spring 33.
  • This device comprises a toothed cam 37 which a linkage not shown makes it possible to move when acting on a trigger 38 mounted in the butt 4 of the gun.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)

Claims (10)

1. Auftraggerät für geschmolzene Materialen, bestehend aus einem Gehäuse mit einer Wärmeschmelzkammer (2) und damit verbundenen Ausgabedüse (5) und Einlasshülse (6), wobei die Stange (8) aus auszugebendem Material in der Einlasshülse (6) derart vorschiebbar ist, dass sie in die Wärmeschmelzkammer (2) allmählich eindringt und das darin geschmolzene Material aus der Ausgabedüse (5) damit verdrängt, und wobei die Einlasshülse (6) mit einer Klemmvorrichtung versehen ist, die derart ausgelegt ist, dass sie die Stange (8) greift, dadurch gekennzeichnet, dass die Klemmvorrichtung (14) derart ausgelegt, dass sie von der Stange (8) gegen eine federnde Rückstellkraft mitgenommen wird, wenn die Stange (8) vorrückt, und dass die Klemmvorrichtung (14) danach die Stange (8) unter der Wirkung der Rückstellkraft zurückführt, wenn der Vorschub der Stange (8) aufgehalten ist.
2. Auftraggerät nach Anspruch 1, dadurch gekennzeichnet, dass die Klemmvorrichtung (14) auf der Einlasshülse (6) verschiebbar gelagert ist, und federnde Arme (17) aufweist, die mit Backen (18) versehen sind, welche die Stange (8) oberhalb von der Einlasshülse (6) nicht weit davon zu klemmen bestimmt sind.
3. Auftraggerät nach Anspruch 2, dadurch gekennzeichnet, dass die Backen (18) abgeschrägte Kanten (19) aufweisen, mit denen die Backen (18) in Berührung mit der Stange (8) kommen.
4. Auftraggerät nach einer der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass die Klemmvorrichtung (14) federnde Flügel (16) aufweist, mit denen sie auf dem Gerätegehäuse (10) aufliegt, und die die Rückstellkraft ausüben.
5. Auftraggerät nach irgendeiner der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Klemmvorrichtung einteilig ausgebildet ist.
6. Auftraggerät nach einer der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass die Klemmvorrichtung (14) eine Feder aufweist, die auf dem Gehäuse (10) aufliegt, um die Rückstellkraft auszuüben.
7. Auftraggerät nach Anspruch 6, dadurch gekennzeichnet, dass die Klemmvorrichtung (14) zwei Halbschalen (20) aufweist, welche einen Sockel (22) bilden, auf dem die Feder (21) aufliegt, um die Backen (18) zu schliessen.
8. Auftraggerät nach irgendeiner der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Klemmvorrichtung (14) auf dem vorstehenden Teil der Einlasshülse (6) eines Auftraggerätes gelagert ist, in welchem die Stange (8) vom Benutzer unmittelbar vorgeschoben wird.
9. Auftraggerät nach irgendeiner der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Klemmvorrichtung (14) im Auftraggerät unterhalb von der Vorrichtung (27) angeordnet ist, die zum Vorschub der Stange dient.
10. Auftraggerät nach Anspruch 9, mit einer Kolbenvorschubvorrichtung (27), dadurch gekennzeichnet, dass die Klemmvorrichtung (14) in dem Zylinder (25) der Vorschubvorrichtung (27) eindringt.
EP80401774A 1979-12-14 1980-12-10 Auftraggerät für geschmolzene Materialien, wie z.B. thermoplastische Klebstoffe Expired EP0030893B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7930718 1979-12-14
FR7930718A FR2471221A1 (fr) 1979-12-14 1979-12-14 Applicateur de matieres fondues telles que des colles thermoplastiques

Publications (2)

Publication Number Publication Date
EP0030893A1 EP0030893A1 (de) 1981-06-24
EP0030893B1 true EP0030893B1 (de) 1984-06-13

Family

ID=9232790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401774A Expired EP0030893B1 (de) 1979-12-14 1980-12-10 Auftraggerät für geschmolzene Materialien, wie z.B. thermoplastische Klebstoffe

Country Status (6)

Country Link
US (1) US4379516A (de)
EP (1) EP0030893B1 (de)
JP (1) JPS56129053A (de)
BR (1) BR8008067A (de)
ES (1) ES267085Y (de)
FR (1) FR2471221A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8129768U1 (de) * 1981-10-12 1983-03-24 Ursprung, Reinhard, 8919 Utting Heissklebepistole
GB2113345B (en) * 1982-01-21 1985-09-18 British United Shoe Machinery Apparatus for feeding adhesive in rod form
NZ210504A (en) * 1983-12-22 1987-03-31 Bostik New Zealand Ltd Hot melt dispenser:spring urges hot melt material out of melt chamber when not dispensing
GB8514851D0 (en) * 1985-06-12 1985-07-17 Bostik Ltd Hot melt dispensers
US4692587A (en) * 1986-02-19 1987-09-08 Spirk Jr John W Hand tool and support
DE8613376U1 (de) * 1986-05-16 1986-06-26 Ursprung, Reinhard, 8088 Eching Heißkleberpistole mit mechanischem Vorschub
US5067887A (en) * 1987-08-07 1991-11-26 Black & Decker Inc. Hot-melt adhesive recycling system
US4951846A (en) * 1989-02-02 1990-08-28 Minnesota Mining And Manufacturing Company Hot melt applicator with anti-drip mechanism
US5462206A (en) * 1994-10-12 1995-10-31 Kwasie; Jon B. Melting assembly for thermoplastic materials
US5971212A (en) * 1997-10-27 1999-10-26 Drader; Clarence H. Apparatus for welding thermoplastics by high pressure injection
US6457606B1 (en) * 2000-01-27 2002-10-01 Bright Solutions, Inc. Method and device for introducing fluid material into a climate control system
US7775403B2 (en) * 2005-08-31 2010-08-17 Robert Bosch Gmbh Power hand tool having a retractable front stand
US9643200B2 (en) * 2014-12-19 2017-05-09 Richard A. Belanger Squeeze container liquid extrusion tool
CN107159530A (zh) * 2017-06-16 2017-09-15 奉化市威优特电器有限公司 一种热熔胶枪的加热装置
US10486186B2 (en) * 2018-03-14 2019-11-26 Adhesive Technologies, Inc. No-drip hot melt glue gun

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188056A (en) * 1964-05-04 1965-06-08 Pyles Ind Inc Cartridge type plural component mixing and dispensing device
US3314574A (en) * 1965-08-11 1967-04-18 United Shoe Machinery Corp Plastic cement heating, melting and extruding tool
US3774817A (en) * 1971-03-10 1973-11-27 Thermotech Inc Hot melt adhesive applicator
US3743142A (en) * 1971-10-08 1973-07-03 Usm Corp Adhesive extruders
US3774814A (en) * 1971-10-26 1973-11-27 Star Kist Foods Metering apparatus
US3964644A (en) * 1974-09-26 1976-06-22 Transworld Adhesive & Chemical Corporation Adhesive dispensing apparatus
US4090643A (en) * 1976-09-17 1978-05-23 The Terrell Corporation Hot melt applicator
DD136457A1 (de) * 1978-05-11 1979-07-11 Friedrich Hans Joachim Schmelzklebstoff-auftragsgeraet
DE2829598A1 (de) * 1978-07-05 1980-01-24 Hilti Ag Schmelzklebepistole

Also Published As

Publication number Publication date
FR2471221A1 (fr) 1981-06-19
ES267085Y (es) 1983-11-16
FR2471221B1 (de) 1984-09-07
ES267085U (es) 1983-04-16
JPS56129053A (en) 1981-10-08
US4379516A (en) 1983-04-12
BR8008067A (pt) 1981-06-23
EP0030893A1 (de) 1981-06-24

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