WO2006097431A1 - Dispositif et procede pour appliquer des composants coulants - Google Patents

Dispositif et procede pour appliquer des composants coulants Download PDF

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Publication number
WO2006097431A1
WO2006097431A1 PCT/EP2006/060606 EP2006060606W WO2006097431A1 WO 2006097431 A1 WO2006097431 A1 WO 2006097431A1 EP 2006060606 W EP2006060606 W EP 2006060606W WO 2006097431 A1 WO2006097431 A1 WO 2006097431A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzles
components
substrate
advantageously
application
Prior art date
Application number
PCT/EP2006/060606
Other languages
German (de)
English (en)
Inventor
Claus Fueger
Stephan WEINKÖTZ
Wolfgang Wehl
Jörg WILD
Björn LEMMERMEYER
Christof Jacob
Holger Kichgessner
Original Assignee
Basf Aktiengesellschaft
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 Basf Aktiengesellschaft filed Critical Basf Aktiengesellschaft
Publication of WO2006097431A1 publication Critical patent/WO2006097431A1/fr

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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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
    • B05C5/0279—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve independently, e.g. individually, flow controlled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00—Applying adhesives or glue to surfaces of wood to be joined

Definitions

  • the present invention relates to a method for continuously applying at least two flowable components to a horizontally moved substrate, wherein the components in the form of strands and / or dots is applied, wherein the number of component strands and / or points and / or the position The component strands and / or points on the substrate during the application can be changed. Furthermore, the invention relates to an apparatus for carrying out the method with a conveyor for the substrate and at least one coating portal to which supply lines for the components are connected, wherein the coating portal contains at least one discharge device for each component and wherein the discharge device has closable nozzles, which are to be opened and closed by a common drive.
  • Hot melt adhesive as the only flowable component to a substrate, e.g. Wood veneer is described in US-A 4,420,510.
  • the hot melt adhesive is applied via a series of nozzles. The task was to obtain a uniform application in the direction of the substrate. The nozzles can not be controlled individually. Therefore, depending on the substrate width always more or less surplus of hot melt adhesive occurs, which must be collected consuming and returned. In addition, there is a risk that the side edges of the substrate are contaminated by flowing past melt adhesive.
  • hotmelt adhesive serves as a spacer and will be removed at a later time. From two or three jets, hotmelt adhesive is mainly applied to the glass plate close to the edge. The nozzles cover a small area and can not be controlled individually.
  • Hot melt adhesive disclosed via parallel nozzles. These can be controlled jointly or individually with the aid of an elaborate control system. The dimensions of the device in general and the nozzles in particular are not indicated.
  • the focus of the wood industry is the separate application of several components, such as a resin and hardener component, on a moving substrate.
  • these come into contact only when applied to the substrate, on the substrate or advantageously only during further processing, such as the compression of the substrates, which allows a longer period of time between applying and pressing pass without undesirable extent of cure during this period.
  • the time period is called open time or also assembly or processing time.
  • DE-A 37 12 347 discloses a device for applying glue to wood parts to be glued, having a feed device for the wood parts, a hollow body arranged above the feed path and extending transversely thereto, one or more on its side facing the feed direction Having rows of outlet openings in the form of holes or slots and is connected to a reservoir for the glue and a pump.
  • a second application device which is identical to that for the glue, is arranged.
  • EP-A 860 251 describes a device for applying a multi-component system which has a first hollow body provided with outlet pipes and a second hollow body provided with at least as many outlet openings as there are outlet pipes in the first hollow body, the outlet openings of the second hollow body surrounding the openings of the outlet tubes of the first hollow body circular.
  • EP-A 1 089 827 discloses a device for applying a glue-hardener system comprising at least two components, wherein the device consists of a unit of at least two high components, one component each for a component. Each component is provided with a number of openings, so that the corresponding components are applied in the form of strands on a substrate moving under the hollow components.
  • EP-A 1 426 114 describes the application of glue and hardener to a substrate by means of two series of nozzles connected in series.
  • the nozzles can not be controlled individually.
  • a small or larger surplus of components always accumulates, which is collected and returned in a complex manner. must be led.
  • the side edges of the substrate can be contaminated by passing components.
  • the substrates can be coated flat.
  • the woodworking companies demand, in addition to the properties that the device for applying flowable components should work very quickly and should be operated, maintained and cleaned with little effort, that the device can also be adapted to unevenly wide substrates, so that neither Verleimungskomponenten can get over the edge of the substrates, still remains too wide a distance to the edge uncoated.
  • a varying width may be caused by non-uniform widths of the substrates or by substrates not introduced vertically into the gluing plant.
  • Another disadvantage of the nozzle systems of the prior art is further that the nozzles are open even during a production stoppage and thus tend to dust due to dust or curing of the glue system for clogging.
  • the object of the present invention was therefore to find a method and a device for applying at least two flowable components, which allows a spatially delimited coating fast moving substrates of varying width without losing significant amount of the flowable components over the edge of the substrates or to receive uncoated edge pieces.
  • the application of the components at the beginning, i. at the beginning of the substrate, as well as at the end of production, for example at the substrate end start abruptly and precisely or stop.
  • the applicator should be easy to clean and maintain.
  • strand also includes the meaning of other terms “ribbon”, “strip” or “string” used in the art and any other similar term.
  • two or more flowable components in the form of parallel strands or dots, in particular strands applied may optionally be applied selectively, individually and independently.
  • two or more components are applied alternately, in particular in parallel strands, to the substrate.
  • the number of component strands and / or component points is expediently adapted to the width of the substrate and the position of the substrate.
  • the number of component strands and / or component points can advantageously be varied between 10 and 100 per component per substrate width, in particular between 30 and 70.
  • the width of the substrates is usually 50 to 400 mm, advantageously 150 to 300 mm.
  • the strands or points of the individual components can overlap partially or completely, depending on the respective reactivity, or can be applied spatially separated without overlapping, as for example in the earlier German patent application with the application file reference 102004015736.7.
  • the components can be applied temporally and / or spatially offset simultaneously or temporally and / or spatially offset from one another.
  • the order of the particular application of the components can be selected depending on the substrate, the particular components used, the subsequent spread and the desired essential properties of the final product.
  • V fluid a a nozzle
  • the speed of the substrate vs, in particular wood component is expediently 20 to 300 m / min, advantageously 50 to 250 m / min, preferably 100 to 200 m / min;
  • the strand diameter of the components ds when hitting the substrate is expediently from 0.2 to 5 mm, advantageously from 0.5 to 3 mm, preferably from 1 to 2 mm;
  • the diameter of the nozzles dados, from which the components flow, is expediently 0.5 to 5 mm, advantageously 1 to 3 mm, in particular 1, 6 to 2 mm and the factor a is advantageously from 0.1 to 2.0, preferably from 0.2 to 1.0.
  • the substrate speed vs is at least as great as the outflow velocity VFiuid of the flowable component.
  • a two-component system comprising a glue system and a hardener system is applied.
  • the combined application amount is advantageously from 20 to 500 g / m 2 , preferably from 200 to 450 g / m 2 , more preferably from 250 to 400 g / m 2 .
  • the weight ratio of size to hardener is preferably 80:20 to 20:80, preferably 70:30 to 30:70, more preferably 60:40 to 40:60.
  • melamine-urea-formaldehyde resins and / or etherified melamine-formaldehyde resins are used, wherein in a mixture, the proportion of the etherified component is advantageously> 50%, in particular> 75%.
  • the degree of etherification is advantageously from 1 to 95%, preferably from 15 to 80, in particular from 30 to 65%.
  • the hardener system used is advantageously acids, an acidic salt and / or an acid-forming salt.
  • Hardener systems are generally known and described, for example, in the earlier German applications with the file references 10345095.5-45 (page 4), 102004015736.7 (page 5) and 102004038785.0 (page 4).
  • the method according to the invention is not limited to a specific application, but it is advantageously used in the wood industry.
  • the method is preferably used for separate application in the bonding of wood, for example in non-supporting applications such as parquet, Rollenh internallykaschtechniken (films on, for example chipboard), veneers, plywood, single-layer boards, multi-layer boards, shuttering panels.
  • the method is advantageously used in load-bearing applications, such as, for example, glulam, duo- or trio-bars (see also WO 02/068178 or EP-A 860 251).
  • the invention relates to a device for carrying out the method according to the invention.
  • the device according to the invention is defined at the beginning.
  • the common drive can be controlled pneumatically, electro-magnetically, mechanically or hydraulically.
  • the device advantageously has at least two coating portals, each with a discharge device.
  • a coating portal may also have a plurality of discharge devices.
  • the discharge device (s) is / are advantageously constructed from a number of individual nozzles and / or valves.
  • the individual discharge devices have 10 to 100 nozzles, preferably 30 to 70 nozzles.
  • the individual nozzles of a discharge device are advantageously arranged at a distance of 3 mm to 15 mm, preferably from 4 to 12 mm, in particular from 5 to 9 mm.
  • the nozzles are conveniently arranged in series.
  • several rows can be arranged one behind the other, which are arranged on the gap or directly behind one another.
  • two rows are used, wherein the nozzles of the second row are advantageously arranged on a gap to the first row.
  • the distance between the two rows should be as small as possible, advantageously less than 20 mm, preferably less than 15 mm.
  • the discharge device is expediently fed via a pressurized circulation circuit with the flowable components, wherein the discharge device is connected via supply lines to a component reservoir.
  • the pressure is expediently adapted to the required flow rate of the flowable components.
  • the discharge device can be designed, for example, as a flow tube with a flow cross section of 200 to 3000 mm 2 .
  • the discharge devices advantageously have nozzles which can be opened and closed again via sealing plungers.
  • the plunger seals the nozzle in that it is made precisely to the nozzle diameter and completely immersed in the nozzle when closing.
  • the plunger may protrude from the nozzle by a few millimeters when closing, advantageously the plunger protrudes no more than 3 mm out of the nozzle.
  • the plunger protrudes 0.5 to 1 mm out of the nozzle.
  • the diameters of the nozzles and the plunger are thus designed so that no flowable component can flow through the remaining gap.
  • the general production of a precisely fitting plunger is known to those skilled in the field of mechanical engineering.
  • the stroke of the plunger is suitably 2 to 15 mm, advantageously 4 to 10 mm.
  • the opening force is suitably at 30 to 150 N, advantageously at 50 to 100 N.
  • the nozzle diameter is advantageously 0.5 to 5 mm, preferably 1 to 3 mm, in particular 1, 6 to 2 mm.
  • the ratio of nozzle diameter to nozzle length is advantageously 0.2: 1 to 3: 1, preferably 0.5: 1 to 2: 1.
  • the tappet-nozzle system may advantageously be designed in the form of a conical seal, in the form of a Kugelkeegtichtung or in the form of a cylinder gap seal.
  • the plunger nozzle system is designed as a cylinder gap seal.
  • individual nozzles are selectively and independently open and close.
  • the nozzles are closed or opened depending on the width of the substrate or remain in the open state.
  • an edge area of the substrate of not more than 10 mm should remain un-glued and no free-flowing component or only insignificant amounts should be added next to or in front of or behind the substrate.
  • the application device is preceded by a measuring system, for example with an optical sensor, which detects the width and position of the substrates to which the components are to be applied.
  • This measuring system sends a signal to the order system.
  • Suitable optical systems are well known. Particularly suitable are so-called light barriers, which consist of an optical / electronic system comprising a light source (transmitter) and a receiver (sensor).
  • the optical signal of visible, infrared and / or ultraviolet light is polychromatically or monochromatically, for example in the form of laser light, emitted and registered by an optical sensor. This can be done via one way or reflection. If the light path through the substrate is e.g. affected by interruption, this is registered by the optical system.
  • a signal is generated, which is possibly still converted. This will be sent to the order system.
  • the application system switches the nozzles of the applicator accordingly, ie the nozzles are opened or closed.
  • Suitable systems are, for example, individual photoelectric barriers. Particularly suitable systems are curtains made of light barriers and laser scanners.
  • one or more nozzles can be kept permanently closed on one or both sides in the edge region of the preferably arranged in series nozzles. Consequently, the width of the job can be adapted to the width of the substrates.
  • the drive is advantageously designed so that, for example, the plungers are driven in order from the outside to the inside and thus the nozzles are closed from the outside in, ie the nozzles which are arranged to the substrate edges are first closed and last the nozzles which are located toward the substrate center.
  • the nozzles are advantageously opened from the inside to the outside.
  • the first drive is advantageously used to abruptly, simultaneously and precisely open the nozzles when passing through a substrate and to close abruptly, simultaneously and precisely after passing through the substrate.
  • the first drive is operated pneumatically.
  • the second drive is designed so that the second drive can cause the closure of one or more individual nozzles superordinate to the state of the first drive. Consequently, all nozzles are closed by two drives, of which the first drive acts on the nozzles in total and the second drive causes the closure of individual or multiple nozzles.
  • opening and closing requirements can preferably be accomplished by means of a single drive.
  • This drive is preferably operated pneumatically. Consequently, the nozzles are to be opened or closed by a pneumatic drive, wherein the opening or closing is limited by a piston-cylinder unit to a number of nozzles. The number of nozzles is suitably determined by the substrate width.
  • the plungers are advantageously immersed in the nozzle at a comparable speed with which the component / liquid flows through the nozzle.
  • the plungers advantageously come to rest instantaneously as they reach the front end of the nozzle.
  • the plunger can also jump back easily.
  • the free ends of the plungers may optionally have a flat tip.
  • the free ends of the plunger are cone-shaped with a cone angle of at least 120 degrees.
  • the nozzles are made of a material which is not wetted by any of the components to be applied, ie the nozzles consist of a material which is antiadhesive to the flowable components.
  • the nozzles consist of a material which is antiadhesive to the flowable components.
  • a nozzle material Polytetrafluoroethylene, polypropylene, polyethylene, polyvinyl chloride, polyamide, polystyrene, polycarbonate, polyacetate or polyoxymethylene or coatings of the materials mentioned.
  • the nozzles are arranged on a separate, replaceable plate independent of the rest of the circulation circuit, so that they are easy to replace in case of wear.
  • the free ends of the plunger are made from a de-entangling, non-adhesive material, such as polytetrafluoroethylene, polypropylene, polyethylene, polyvinyl chloride, polyamide, polystyrene, polycarbonate, polyacetate or polyoxymethylene or coatings of the materials mentioned.
  • a de-entangling, non-adhesive material such as polytetrafluoroethylene, polypropylene, polyethylene, polyvinyl chloride, polyamide, polystyrene, polycarbonate, polyacetate or polyoxymethylene or coatings of the materials mentioned.
  • material for the ram usually materials come into consideration, which are wetted by none of the components to be applied, for example polytetrafluoroethylene, polypropylene, polyethylene, polyvinyl chloride, polyamide, polystyrene, polycarbonate, polyacetate or polyoxymethylene.
  • the reservoir in the interior of the application system as well as the nozzle inner surface are coated with a wear-resistant material.
  • a wear-resistant material is particularly suitable stainless steel in the form of a thin sheet or in the form of press-in hollow rivets.
  • the nozzles can be surrounded by annular air nozzles in order to blow off the components on the plunger synchronously with the switch-off time.
  • the plungers can also be designed as hollow needles. Compressed air can be passed through the bore, which accelerates the tearing off of the liquid strand, in particular at the switch-off time.
  • heat sources for example heating elements
  • the components evaporate at this point in a short time.
  • the feed device which is located below the coating portal, is also advantageously equipped with a pressure system, so that the substrates pass flush on one side of the coating portal and the distance between substrate and discharge device remains constant.
  • This distance is expediently from 5 to 100 mm, advantageously from 5 to 50 mm, preferably from 10 to 30 mm.
  • the two coating portals can be at a distance of half the nozzle from one another transversely to the substrate direction, ie about 1, 5 to 7.5 mm, be arranged laterally offset, so that the two components are each applied to the substrate on the gap.
  • the coating portals can advantageously be aligned with the aid of a device for positioning.
  • these are advantageously applied spatially separately from one another, wherein the distance between the coating portals in the direction of the continuous substrate should be as small as possible, preferably smaller than 50 cm, in particular smaller than 10 cm.
  • the combined sealing and cleaning method according to the invention has an effect.
  • the precise application of both glue and hardener can be saved.
  • Fig. 1 is a perspective view of the discharge of the coating portal
  • FIG. 3 shows a cross-sectional drawing of a plunger with a flat tip which closes the nozzle
  • Fig. 4 Overall view of the device with two coating portals and the substrate
  • the device has at least one coating portal 1 which consists of a discharge device 2 which has a component-guiding system 3, a plurality of nozzles 4 and associated plungers 5.
  • the free ends of the plunger 5a are optionally formed conical.
  • the plungers are controlled by a common drive 6.
  • the components 7a and 7b are applied to the substrate 8 separately from each other.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé permettant d'appliquer au moins deux composants, coulants, sur un substrat mobile horizontalement, selon lequel les composants sont appliqués sous forme de bandes et/ou de points, la quantité de bandes de composants et/ou de points et/ou la position des bandes de composants et/ou de points peuvent être modifiées sur le substrat pendant l'application. De plus, l'invention concerne un dispositif permettant de réaliser le procédé de l'invention, comprenant un dispositif de transport pour le substrat et au moins un portail de revêtement, sur lequel des lignes d'alimentation destinées aux composants sont raccordées. Le portail de revêtement contient au moins un dispositif d'application pour chaque composant et ce dernier comprend des buses pouvant être fermées, lesquelles peuvent s'ouvrir ou se fermer par un actionnement simultané.
PCT/EP2006/060606 2005-03-14 2006-03-09 Dispositif et procede pour appliquer des composants coulants WO2006097431A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005011991.3 2005-03-14
DE102005011991 2005-03-14

Publications (1)

Publication Number Publication Date
WO2006097431A1 true WO2006097431A1 (fr) 2006-09-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/060606 WO2006097431A1 (fr) 2005-03-14 2006-03-09 Dispositif et procede pour appliquer des composants coulants

Country Status (1)

Country Link
WO (1) WO2006097431A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015117334A1 (de) * 2015-10-12 2017-04-13 Eberhard Dolski Dosiereinrichtung sowie System und Verfahren zur Aufbringung eines fließfähigen Mediums auf eine Oberfläche
CN114590050A (zh) * 2022-03-21 2022-06-07 东营职业学院 一种可连续自动涂胶的会计用涂胶机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157149A (en) * 1977-10-31 1979-06-05 Moen Lenard E Multiple nozzle fluid dispenser for complex fluid delivery patterns
US4679711A (en) * 1985-09-11 1987-07-14 Nordson Corporation Multi-orifice zero cavity nozzle dispenser
US4874451A (en) * 1986-03-20 1989-10-17 Nordson Corporation Method of forming a disposable diaper with continuous/intermittent rows of adhesive
US5269670A (en) * 1990-10-17 1993-12-14 Exxon Chemical Patents Inc. Meltblowing die
US6340122B1 (en) * 1998-06-18 2002-01-22 Casco A/S Spreader for spreading a fluid, such as an adhesive

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157149A (en) * 1977-10-31 1979-06-05 Moen Lenard E Multiple nozzle fluid dispenser for complex fluid delivery patterns
US4679711A (en) * 1985-09-11 1987-07-14 Nordson Corporation Multi-orifice zero cavity nozzle dispenser
US4874451A (en) * 1986-03-20 1989-10-17 Nordson Corporation Method of forming a disposable diaper with continuous/intermittent rows of adhesive
US5269670A (en) * 1990-10-17 1993-12-14 Exxon Chemical Patents Inc. Meltblowing die
US6340122B1 (en) * 1998-06-18 2002-01-22 Casco A/S Spreader for spreading a fluid, such as an adhesive

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015117334A1 (de) * 2015-10-12 2017-04-13 Eberhard Dolski Dosiereinrichtung sowie System und Verfahren zur Aufbringung eines fließfähigen Mediums auf eine Oberfläche
CN114590050A (zh) * 2022-03-21 2022-06-07 东营职业学院 一种可连续自动涂胶的会计用涂胶机
CN114590050B (zh) * 2022-03-21 2022-12-09 东营职业学院 一种可连续自动涂胶的会计用涂胶机

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