CA2612020A1 - Dispenser - Google Patents
Dispenser Download PDFInfo
- Publication number
- CA2612020A1 CA2612020A1 CA002612020A CA2612020A CA2612020A1 CA 2612020 A1 CA2612020 A1 CA 2612020A1 CA 002612020 A CA002612020 A CA 002612020A CA 2612020 A CA2612020 A CA 2612020A CA 2612020 A1 CA2612020 A1 CA 2612020A1
- Authority
- CA
- Canada
- Prior art keywords
- cavity
- liquid
- outlets
- exit
- passage
- 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.)
- Abandoned
Links
- 239000007788 liquid Substances 0.000 claims abstract description 62
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 230000001921 mouthing effect Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims description 2
- 239000002023 wood Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000004848 polyfunctional curative Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 1
- 239000003637 basic solution Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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
Landscapes
- Coating Apparatus (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Nozzles (AREA)
Abstract
An apparatus arranged for dispensing a liquid, said apparatus comprising a cavity (2) having an inlet (3) connectable to a liquid source operable for supplying liquid under pressure to the cavity (2) , and a number of outlets (5) through which the liquid is discharged to a substrate which is provided below the apparatus in order to receive the liquid, each outlet (5) is individually communicating with the cavity (2) through separate passages (4,11,15) that connect individually to the top of the cavity (2).
Description
DISPENSER
The present invention relates to an apparatus designed for dispensing a liquid such as an adhesive system onto a substrate.
BACKGROUND
The dispensers referred to are frequently used in applications wherein a liquid, such as an adhesive or other liquid component included in an adhesive system, such as a resin component and a hardener component, is discharged to a surface of a piece of material that is successively combined with other such pieces in a laminated structure, such as a wood laminate. In the wood lamination industry, pieces of wood are typically conveyed below a dispenser by which the adhesive is distributed to the wood pieces in the form of curtains or parallel strings. Basically, liquid is supplied under pressure to a cavity in the dispenser from which the liquid is discharged through a multiplicity of outlets or nozzles arranged in one or several rows on the lower side of the dispenser.
The dispensers are typically oriented horizontally and transversely to the general direction of a relative movement between dispenser and substrate.
A frequently occurring problem in this connection is the accumulation of gas bubbles in the dispenser, forming pockets of gas in the dispenser cavity. The gas, which may originate from structural components building up the supplying system, such as stirrers, pumps, connectors etc. drawing air into the liquid, or from chemical processes in the liquid, disadvantageously affects the discharge of liquid through the outlets.
Specifically, the occurrence of gas pockets may cause an uneven distribution of liquid through the outlets, resulting in uneven and unsatisfactory bonding between the wood pieces. The accumulation of gas bubbles in the dispenser is further supported when the inner structure of the dispenser gives rise to stagnant or trapped volumes of liquid.
A non-homogenous distribution of liquid over the line of outlets is also believed to originate from a successively falling internal pressure in the liquid filling the dispenser cavity from an inlet end to the remote end. This shortcoming is further expressed when the pressure drop over the outlets is low, resulting in a heavier flow through an outlet close to the inlet than through the next outlet in the row.
SUMMARY OF THE INVENTION
The present invention aims to solve the problem discussed above and avoids the formation of gas pockets within the apparatus. This object is met in a liquid dispensing apparatus comprising a cavity having an inlet connectable to a liquid source operable for supplying liquid under pressure to the cavity, and a number of outlets through which the liquid is dispensable to a substrate, wherein each outlet individually communicates with the cavity through separate passages mouthing in the cavity, wherein each passage mouths in the cavity through a separate exit, each said exit intersecting adjacent exits arranged in a top of the cavity.
Briefly, an apparatus is arranged for dispensing a liquid, comprising a cavity having an inlet connectable to a liquid source operable for supplying liquid under pressure to the cavity, and a number of outlets through which the liquid is discharged to a substrate which is provided below the apparatus in order to receive the liquid. According to the present invention, each outlet individually communicates with the cavity through separate passages, each said passage connecting individually to the top of the cavity.
The liquid referred to is suitably an adhesive, or other liquid component included in an adhesive system such as a resin component and a hardener component.
Preferably, each outlet communicates with a separate exit, each said exit intersecting with adjacent exits arranged in the top of the cavity.
Advantageously, the exits are formed in a lower side of a spreader insert which is mountable to cover an open top of the cavity.
The spreader insert preferably is formed with multiple through holes, each through hole mouthing in a recess formed in the lower side of the spreader insert, each said recess transforming into adjacent recesses through an intersection line.
In an advantageous realization of the spreader insert, the recesses are formed as inverted cones, or inverted spheres, or inverted pyramids having three or more sides.
In effect of exiting the liquid from the top of the cavity, each outlet is connectable to an appurtenant exit via an interconnecting passage that is formed to turn the flow direction towards the outlets.
Advantageously, the passage is arranged to turn the liquid flow through 180 degrees from the exit to the outlet.
In one embodiment the passage is arranged initially to direct the liquid flow upwards upon exit from the cavity.
In alternative embodiments, each outlet is connectable to an appurtenant exit via interconnecting conduits formed to turn the flow direction towards the outlets.
The apparatus general structure comprises:
- a main block formed with a cavity and multiple outlets;
- a spreader insert receivable at the open top of the cavity, the spreader insert having multiple exits;
- a cover block mountable over the main block and the spreader insert, the cover block interconnecting the exits and the outlets for fluid communication, and - snap lock means for mounting and dismounting the cover block from the main block.
The present invention relates to an apparatus designed for dispensing a liquid such as an adhesive system onto a substrate.
BACKGROUND
The dispensers referred to are frequently used in applications wherein a liquid, such as an adhesive or other liquid component included in an adhesive system, such as a resin component and a hardener component, is discharged to a surface of a piece of material that is successively combined with other such pieces in a laminated structure, such as a wood laminate. In the wood lamination industry, pieces of wood are typically conveyed below a dispenser by which the adhesive is distributed to the wood pieces in the form of curtains or parallel strings. Basically, liquid is supplied under pressure to a cavity in the dispenser from which the liquid is discharged through a multiplicity of outlets or nozzles arranged in one or several rows on the lower side of the dispenser.
The dispensers are typically oriented horizontally and transversely to the general direction of a relative movement between dispenser and substrate.
A frequently occurring problem in this connection is the accumulation of gas bubbles in the dispenser, forming pockets of gas in the dispenser cavity. The gas, which may originate from structural components building up the supplying system, such as stirrers, pumps, connectors etc. drawing air into the liquid, or from chemical processes in the liquid, disadvantageously affects the discharge of liquid through the outlets.
Specifically, the occurrence of gas pockets may cause an uneven distribution of liquid through the outlets, resulting in uneven and unsatisfactory bonding between the wood pieces. The accumulation of gas bubbles in the dispenser is further supported when the inner structure of the dispenser gives rise to stagnant or trapped volumes of liquid.
A non-homogenous distribution of liquid over the line of outlets is also believed to originate from a successively falling internal pressure in the liquid filling the dispenser cavity from an inlet end to the remote end. This shortcoming is further expressed when the pressure drop over the outlets is low, resulting in a heavier flow through an outlet close to the inlet than through the next outlet in the row.
SUMMARY OF THE INVENTION
The present invention aims to solve the problem discussed above and avoids the formation of gas pockets within the apparatus. This object is met in a liquid dispensing apparatus comprising a cavity having an inlet connectable to a liquid source operable for supplying liquid under pressure to the cavity, and a number of outlets through which the liquid is dispensable to a substrate, wherein each outlet individually communicates with the cavity through separate passages mouthing in the cavity, wherein each passage mouths in the cavity through a separate exit, each said exit intersecting adjacent exits arranged in a top of the cavity.
Briefly, an apparatus is arranged for dispensing a liquid, comprising a cavity having an inlet connectable to a liquid source operable for supplying liquid under pressure to the cavity, and a number of outlets through which the liquid is discharged to a substrate which is provided below the apparatus in order to receive the liquid. According to the present invention, each outlet individually communicates with the cavity through separate passages, each said passage connecting individually to the top of the cavity.
The liquid referred to is suitably an adhesive, or other liquid component included in an adhesive system such as a resin component and a hardener component.
Preferably, each outlet communicates with a separate exit, each said exit intersecting with adjacent exits arranged in the top of the cavity.
Advantageously, the exits are formed in a lower side of a spreader insert which is mountable to cover an open top of the cavity.
The spreader insert preferably is formed with multiple through holes, each through hole mouthing in a recess formed in the lower side of the spreader insert, each said recess transforming into adjacent recesses through an intersection line.
In an advantageous realization of the spreader insert, the recesses are formed as inverted cones, or inverted spheres, or inverted pyramids having three or more sides.
In effect of exiting the liquid from the top of the cavity, each outlet is connectable to an appurtenant exit via an interconnecting passage that is formed to turn the flow direction towards the outlets.
Advantageously, the passage is arranged to turn the liquid flow through 180 degrees from the exit to the outlet.
In one embodiment the passage is arranged initially to direct the liquid flow upwards upon exit from the cavity.
In alternative embodiments, each outlet is connectable to an appurtenant exit via interconnecting conduits formed to turn the flow direction towards the outlets.
The apparatus general structure comprises:
- a main block formed with a cavity and multiple outlets;
- a spreader insert receivable at the open top of the cavity, the spreader insert having multiple exits;
- a cover block mountable over the main block and the spreader insert, the cover block interconnecting the exits and the outlets for fluid communication, and - snap lock means for mounting and dismounting the cover block from the main block.
The present invention further includes the use of the apparatus according to the present invention for applying a liquid onto a substrate. The liquid is preferably an adhesive, or other liquid component included in an adhesive system such as a resin component and a hardener component. The substrate is preferably a wood based substrate.
The dispenser of the present invention will be more closely described below with reference to the accompanying drawings, wherein Fig. 1 is a perspective view showing the dispenser of the present invention from above;
Fig. 2 is an exploded top view showing the structural details of the dispenser;
Fig. 3 is an exploded bottom view showing the same;
Fig. 4 is a transversal section through the dispenser, and Fig. 5 is a longitudinal section through the same.
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the dispensing apparatus according to this invention is shown in the drawings, from which it is readily apparent that the present dispenser is dismountable for maintenance. Typically, the dispensers referred to are elongate bodies, having a longitudinal dimension adapted for dispensing the liquid over the total width of a substrate that is provided below the dispenser. Nevertheless, multiple dispensers may in some applications be required to fully cover the width of a substrate.
With reference to the drawings, the dispenser comprises a main block 1, forming a base onto which the other details of the dispenser are attachable. The main block 1 has an elongate cavity 2 extended in the longitudinal direction of the main block.
The cavity 2 opens in the top side of the main block 1, and is supplied with liquid via an inlet 3 which opens in a side surface of the main block. Though not shown in the drawings, the inlet 3 is connectable to a liquid source via pumping means which are operable to feed the liquid under pressure to the cavity 2. Advantageously, the sectional area of the cavity 2 may be reducing from an inlet end towards an opposite end of the cavity, preferably realized through a successively reducing depth or width in this direction of the cavity. A plurality of through holes or passages 4 connect the top side of the main block 1 with the lower side thereof, the passages 4 mouthing in the lower side in one or several rows of individual outlets 5 as is visible from fig. 3. The outlets may conventionally be adapted to receive separate nozzles, if appropriate. A groove 6 is formed to receive a sealing member 7, continuously encircling the cavity and passage openings in the top side of main block 1.
An additional sealing member 8 is receivable to rest on a shoulder 9 which runs continuously about an inner wall of the cavity 2, and which shoulder provides a seat for a spreader insert 10.
The spreader insert 10 forms a top cover for the cavity 2, and is receivable to rest on the shoulder 9 and sealing member 8 with its top surface leveling with the top surface of the main block 1. A number of through holes or passages 11 are formed through the spreader insert 10, equaling the number of passages 4 passing through the main block 1. Each passage 11 mouths in the lower surface of the spreader insert 10 through a widened opening 12, visible in figs. 3-5. These openings 12, constituting the exit from the cavity, may be formed as conical or spherical cups, or inverted pyramids having three or more sides, recessed from the lower surface of the spreader insert.
Advantageously, the recesses or exits 12 are dimensioned to overlap adjacent exits such that each exit 12 transforms into an adjacent exit 12 via an intermediate intersection line 13, i.e. each exit intersects with adjacent exits without any substantial interconnecting surface between adjacent exits 12, as is notable from the drawings. On the top side of the spreader insert 10, the passages 11 mouth in a pattern that allows each passage 11 to be aligned with the top side opening of a an appurtenant passage 4 through the main block 1.
The passage 11 may be formed with a more or less accentuated vertical length measured from the upper end of the corresponding exit 12 to the top side of the spreader insert 10. One embodiment of the present invention foresees that the flow of liquid is initially directed upwards through a vertical length of the passage 11, upon exit from the cavity, and turned twice through a total of 180 degrees before discharge via the outlets.
A cover block 14 is arranged for connecting each passage 11 through the spreader insert 10 with a corresponding passage 4 through the main block 1.
For this purpose, the cover block 14 is formed in its lower surface with a number of grooves 15, the lengths of which are adapted for connecting a top side mouth of a passage 11 with the appurtenant top side mouth of a passage 4. In its mounted position, the grooves 15 in the cover block complete the individual fluid passages from the exits 12 to the outlets 5.
The cover block 14 is readily mountable and dismountable, respectively, on the main block 1 through a snap connection. In one end, the cover block has a heel 16 which is shaped to engage the lower side of a corresponding nose 17 arranged on the main block. The opposite end of the cover block is formed with a lug 18 which is arranged for engagement with an eccentric lock mechanism 19. In a snapped on position, the lower surface of the cover block is sealingly pressed towards the top surfaces of the main block 1 and the spreader insert 10, respectively. A centering pin 20, threaded through the cover block, ensures the correct positioning and free passageways from the cavity's exits to the outlets, via passage sections 11, 15, and 4.
For a full presentation of the illustrated embodiment, the nose 17 is bolted to the main block through a couple of screws 21 reaching through bores 22 formed in the main block. The eccentric lock mechanism 19 is bolted to the main block through a couple of screws 23, reaching through bores 24 and engaging an anchor 25 inserted in a slot 26 5 which runs parallel to a seat 27 for the eccentric lock mechanism, the seat 27 being formed in a side surface of the main block 1. On its top side, the cover block comprises means 28 adapted for installing the dispenser in a production line.
As apparent from the above description of the structural design, the liquid passage through the dispenser from the inlet 3 to the outlets 5 contains no obstructing or entrapping formations where gas bubbles may accumulate, or formations that may prevent any gas bubbles present in the liquid from being transported with the liquid flow through the passages. Moreover, the exits from the cavity are oriented in the top of the cavity, taking advantage of the natural rise of lighter gas bubbles eventually enclosed in the liquid. Furthermore, any gas bubble that rises through liquid standing in the cavity during intermittent operation is instantaneously introduced in a partial flow and captured in a flow of comparatively high velocity through the passages, directing the flow from the cavity to the outlets. The capacity to vent the dispenser apparatus is further enhanced by arranging separate passages initially to direct the liquid flow so as to exit from the top of the cavity, and successively to turn the partial flows towards the outlets.
In effect of exiting the liquid from the top of the cavity, the flow direction must be altered through 90 or 180 degrees in order to discharge the liquid from the lower side of the dispenser. The inevitable horizontal and vertical components of this multidirectional liquid flow results in added passage length from exit to outlet, generating a corresponding resistance and pressure drop over the passages. The raised drop in pressure over the passages advantageously reduces the influence of a falling pressure internally in the cavity, thus also reducing or avoiding a non-homogenous distribution of liquid over the line of outlets.
Another advantage achieved by the presented dispenser is a continuous and complete liquid turnover in the cavity, resulting in part from the non-broken exit area facing the cavity from above, and in part from the reducing sectional area from the inlet towards the remote end of the cavity. In effect thereof the structure avoids stagnant volumes of liquid, and accordingly avoids the risk of entrapped volumes of liquid impairing the distribution of liquid as well as the risk of entrapped volumes of adhesive curing in the cavity.
The invention is illustrated with respect to an embodiment to which modifications are possible without departing from the basic solution. For example, instead of passageways that are machined as channels through block elements, the outlets 5 may be individually connectable with the exits from the cavity through separate conduits connecting to a distributor covering the top of the cavity.
The dispenser of the present invention will be more closely described below with reference to the accompanying drawings, wherein Fig. 1 is a perspective view showing the dispenser of the present invention from above;
Fig. 2 is an exploded top view showing the structural details of the dispenser;
Fig. 3 is an exploded bottom view showing the same;
Fig. 4 is a transversal section through the dispenser, and Fig. 5 is a longitudinal section through the same.
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the dispensing apparatus according to this invention is shown in the drawings, from which it is readily apparent that the present dispenser is dismountable for maintenance. Typically, the dispensers referred to are elongate bodies, having a longitudinal dimension adapted for dispensing the liquid over the total width of a substrate that is provided below the dispenser. Nevertheless, multiple dispensers may in some applications be required to fully cover the width of a substrate.
With reference to the drawings, the dispenser comprises a main block 1, forming a base onto which the other details of the dispenser are attachable. The main block 1 has an elongate cavity 2 extended in the longitudinal direction of the main block.
The cavity 2 opens in the top side of the main block 1, and is supplied with liquid via an inlet 3 which opens in a side surface of the main block. Though not shown in the drawings, the inlet 3 is connectable to a liquid source via pumping means which are operable to feed the liquid under pressure to the cavity 2. Advantageously, the sectional area of the cavity 2 may be reducing from an inlet end towards an opposite end of the cavity, preferably realized through a successively reducing depth or width in this direction of the cavity. A plurality of through holes or passages 4 connect the top side of the main block 1 with the lower side thereof, the passages 4 mouthing in the lower side in one or several rows of individual outlets 5 as is visible from fig. 3. The outlets may conventionally be adapted to receive separate nozzles, if appropriate. A groove 6 is formed to receive a sealing member 7, continuously encircling the cavity and passage openings in the top side of main block 1.
An additional sealing member 8 is receivable to rest on a shoulder 9 which runs continuously about an inner wall of the cavity 2, and which shoulder provides a seat for a spreader insert 10.
The spreader insert 10 forms a top cover for the cavity 2, and is receivable to rest on the shoulder 9 and sealing member 8 with its top surface leveling with the top surface of the main block 1. A number of through holes or passages 11 are formed through the spreader insert 10, equaling the number of passages 4 passing through the main block 1. Each passage 11 mouths in the lower surface of the spreader insert 10 through a widened opening 12, visible in figs. 3-5. These openings 12, constituting the exit from the cavity, may be formed as conical or spherical cups, or inverted pyramids having three or more sides, recessed from the lower surface of the spreader insert.
Advantageously, the recesses or exits 12 are dimensioned to overlap adjacent exits such that each exit 12 transforms into an adjacent exit 12 via an intermediate intersection line 13, i.e. each exit intersects with adjacent exits without any substantial interconnecting surface between adjacent exits 12, as is notable from the drawings. On the top side of the spreader insert 10, the passages 11 mouth in a pattern that allows each passage 11 to be aligned with the top side opening of a an appurtenant passage 4 through the main block 1.
The passage 11 may be formed with a more or less accentuated vertical length measured from the upper end of the corresponding exit 12 to the top side of the spreader insert 10. One embodiment of the present invention foresees that the flow of liquid is initially directed upwards through a vertical length of the passage 11, upon exit from the cavity, and turned twice through a total of 180 degrees before discharge via the outlets.
A cover block 14 is arranged for connecting each passage 11 through the spreader insert 10 with a corresponding passage 4 through the main block 1.
For this purpose, the cover block 14 is formed in its lower surface with a number of grooves 15, the lengths of which are adapted for connecting a top side mouth of a passage 11 with the appurtenant top side mouth of a passage 4. In its mounted position, the grooves 15 in the cover block complete the individual fluid passages from the exits 12 to the outlets 5.
The cover block 14 is readily mountable and dismountable, respectively, on the main block 1 through a snap connection. In one end, the cover block has a heel 16 which is shaped to engage the lower side of a corresponding nose 17 arranged on the main block. The opposite end of the cover block is formed with a lug 18 which is arranged for engagement with an eccentric lock mechanism 19. In a snapped on position, the lower surface of the cover block is sealingly pressed towards the top surfaces of the main block 1 and the spreader insert 10, respectively. A centering pin 20, threaded through the cover block, ensures the correct positioning and free passageways from the cavity's exits to the outlets, via passage sections 11, 15, and 4.
For a full presentation of the illustrated embodiment, the nose 17 is bolted to the main block through a couple of screws 21 reaching through bores 22 formed in the main block. The eccentric lock mechanism 19 is bolted to the main block through a couple of screws 23, reaching through bores 24 and engaging an anchor 25 inserted in a slot 26 5 which runs parallel to a seat 27 for the eccentric lock mechanism, the seat 27 being formed in a side surface of the main block 1. On its top side, the cover block comprises means 28 adapted for installing the dispenser in a production line.
As apparent from the above description of the structural design, the liquid passage through the dispenser from the inlet 3 to the outlets 5 contains no obstructing or entrapping formations where gas bubbles may accumulate, or formations that may prevent any gas bubbles present in the liquid from being transported with the liquid flow through the passages. Moreover, the exits from the cavity are oriented in the top of the cavity, taking advantage of the natural rise of lighter gas bubbles eventually enclosed in the liquid. Furthermore, any gas bubble that rises through liquid standing in the cavity during intermittent operation is instantaneously introduced in a partial flow and captured in a flow of comparatively high velocity through the passages, directing the flow from the cavity to the outlets. The capacity to vent the dispenser apparatus is further enhanced by arranging separate passages initially to direct the liquid flow so as to exit from the top of the cavity, and successively to turn the partial flows towards the outlets.
In effect of exiting the liquid from the top of the cavity, the flow direction must be altered through 90 or 180 degrees in order to discharge the liquid from the lower side of the dispenser. The inevitable horizontal and vertical components of this multidirectional liquid flow results in added passage length from exit to outlet, generating a corresponding resistance and pressure drop over the passages. The raised drop in pressure over the passages advantageously reduces the influence of a falling pressure internally in the cavity, thus also reducing or avoiding a non-homogenous distribution of liquid over the line of outlets.
Another advantage achieved by the presented dispenser is a continuous and complete liquid turnover in the cavity, resulting in part from the non-broken exit area facing the cavity from above, and in part from the reducing sectional area from the inlet towards the remote end of the cavity. In effect thereof the structure avoids stagnant volumes of liquid, and accordingly avoids the risk of entrapped volumes of liquid impairing the distribution of liquid as well as the risk of entrapped volumes of adhesive curing in the cavity.
The invention is illustrated with respect to an embodiment to which modifications are possible without departing from the basic solution. For example, instead of passageways that are machined as channels through block elements, the outlets 5 may be individually connectable with the exits from the cavity through separate conduits connecting to a distributor covering the top of the cavity.
Claims (11)
1. An apparatus arranged for dispensing liquids, the apparatus comprising a cavity having an inlet connectable to a liquid source operable for supplying liquid under pressure to the cavity, and a number of outlets through which the liquid is dispensable to a substrate, wherein each outlet individually communicates with the cavity through separate passages mouthing in the cavity, wherein each passage mouths in the cavity through a separate exit, each said exit intersecting adjacent exits arranged in a top of the cavity.
2. The apparatus according to claim 1, wherein the exits are formed in a lower side of a spreader insert which is mountable to cover an open top of the cavity.
3. The apparatus according to claim 2, wherein the spreader insert is formed with multiple through holes, each through hole mouthing in a recess formed in the lower side of the spreader insert, each said recess transforming into adjacent recesses through an intersection line.
4. The apparatus according to claim 3, wherein the recesses are formed as inverted cones, or inverted spheres, or inverted pyramids having three or more sides.
5. The apparatus according to claim 2, wherein each outlet is connectable to an appurtenant exit via an interconnecting passage that is formed to turn the flow direction towards the outlets.
6. The apparatus according to claim 5, wherein the passage is arranged to turn the liquid flow through 180 degrees from the exit to the outlet.
7. The apparatus according to claim 6, wherein the passage is arranged initially to direct the liquid flow upwards upon exit from the cavity.'
8. The apparatus according to any one of claims 5-7, wherein each outlet is connectable to an appurtenant exit via interconnecting conduits formed to turn the flow direction towards the outlets.
9. The apparatus according to any one of claims 1-8, comprising (a) a main block formed with a cavity and multiple outlets;
(b) a spreader insert receivable at the open top of the cavity, the spreader insert having multiple exits;
(c) a cover block mountable over the main block and the spreader insert, the cover block interconnecting the exits and the outlets for fluid communication, and (d) snap lock means for mounting and dismounting the cover block from the main block.
(b) a spreader insert receivable at the open top of the cavity, the spreader insert having multiple exits;
(c) a cover block mountable over the main block and the spreader insert, the cover block interconnecting the exits and the outlets for fluid communication, and (d) snap lock means for mounting and dismounting the cover block from the main block.
10. Use of the apparatus according to any one of the claims 1-9 for applying a liquid onto a substrate.
11. Use according to claim 10, wherein the liquid is an adhesive, or other liquid component included in an adhesive system.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05445052 | 2005-06-23 | ||
| EP05445052.3 | 2005-06-23 | ||
| PCT/SE2006/050173 WO2006137800A2 (en) | 2005-06-23 | 2006-05-30 | Dispenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2612020A1 true CA2612020A1 (en) | 2006-12-28 |
Family
ID=35427919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002612020A Abandoned CA2612020A1 (en) | 2005-06-23 | 2006-05-30 | Dispenser |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1893346A2 (en) |
| JP (1) | JP2008543557A (en) |
| CN (1) | CN101203325A (en) |
| AR (1) | AR057379A1 (en) |
| AU (1) | AU2006259901A1 (en) |
| CA (1) | CA2612020A1 (en) |
| NO (1) | NO20080413L (en) |
| RU (1) | RU2367524C1 (en) |
| TW (1) | TWI289479B (en) |
| WO (1) | WO2006137800A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8584613B2 (en) * | 2008-06-30 | 2013-11-19 | Lam Research Corporation | Single substrate processing head for particle removal using low viscosity fluid |
| TW201036709A (en) * | 2009-04-10 | 2010-10-16 | Manz Intech Machines Co Ltd | Liquid screen forming apparatus and liquid screen forming method |
| KR101081899B1 (en) * | 2009-07-21 | 2011-11-10 | 세메스 주식회사 | Treating fluid discharging head unit and treating fluid discharging apparatus with the same |
| MY171701A (en) | 2010-12-30 | 2019-10-23 | United States Gypsum Co | Slurry distributor, system and method for using same |
| US9579822B2 (en) | 2010-12-30 | 2017-02-28 | United States Gypsum Company | Slurry distribution system and method |
| RS59950B1 (en) | 2011-10-24 | 2020-03-31 | United States Gypsum Co | Flow splitter for slurry distribution system |
| US10293522B2 (en) | 2011-10-24 | 2019-05-21 | United States Gypsum Company | Multi-piece mold and method of making slurry distributor |
| US9126223B2 (en) * | 2013-10-31 | 2015-09-08 | Nordson Corporation | Dispensing module and method for dispensing an adhesive |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2081499A1 (en) * | 1991-11-01 | 1993-05-02 | Wesley Fort | Method and apparatus for dispensing multiple beads of viscous liquid |
| JPH09160256A (en) * | 1995-12-07 | 1997-06-20 | Dainippon Screen Mfg Co Ltd | Liquid discharger |
| DE19757678A1 (en) * | 1997-12-23 | 1999-06-24 | Voith Sulzer Papiertech Patent | Web coating applicator for paper or cardboard |
| US6689215B2 (en) * | 1998-09-17 | 2004-02-10 | Asml Holdings, N.V. | Method and apparatus for mitigating cross-contamination between liquid dispensing jets in close proximity to a surface |
| JP3769424B2 (en) * | 1999-09-07 | 2006-04-26 | 富士写真フイルム株式会社 | Image forming method and apparatus |
| JP2003170086A (en) * | 2001-12-11 | 2003-06-17 | Sumitomo Precision Prod Co Ltd | Nozzle device and apparatus for treating substrate equipped with the nozzle device |
-
2006
- 2006-05-30 JP JP2008518090A patent/JP2008543557A/en not_active Ceased
- 2006-05-30 WO PCT/SE2006/050173 patent/WO2006137800A2/en active Application Filing
- 2006-05-30 AU AU2006259901A patent/AU2006259901A1/en not_active Abandoned
- 2006-05-30 EP EP06748013A patent/EP1893346A2/en not_active Withdrawn
- 2006-05-30 CN CNA2006800223357A patent/CN101203325A/en active Pending
- 2006-05-30 CA CA002612020A patent/CA2612020A1/en not_active Abandoned
- 2006-05-30 RU RU2008102364/12A patent/RU2367524C1/en not_active IP Right Cessation
- 2006-06-19 TW TW95121825A patent/TWI289479B/en not_active IP Right Cessation
- 2006-06-20 AR ARP060102602 patent/AR057379A1/en unknown
-
2008
- 2008-01-23 NO NO20080413A patent/NO20080413L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| TW200700165A (en) | 2007-01-01 |
| WO2006137800A2 (en) | 2006-12-28 |
| AR057379A1 (en) | 2007-11-28 |
| AU2006259901A1 (en) | 2006-12-28 |
| TWI289479B (en) | 2007-11-11 |
| JP2008543557A (en) | 2008-12-04 |
| EP1893346A2 (en) | 2008-03-05 |
| WO2006137800A3 (en) | 2007-05-03 |
| NO20080413L (en) | 2008-03-13 |
| RU2367524C1 (en) | 2009-09-20 |
| CN101203325A (en) | 2008-06-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |