CA2535954A1 - Release-agent applicator - Google Patents
Release-agent applicator Download PDFInfo
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- CA2535954A1 CA2535954A1 CA002535954A CA2535954A CA2535954A1 CA 2535954 A1 CA2535954 A1 CA 2535954A1 CA 002535954 A CA002535954 A CA 002535954A CA 2535954 A CA2535954 A CA 2535954A CA 2535954 A1 CA2535954 A1 CA 2535954A1
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- Canada
- Prior art keywords
- roller
- applicator
- release
- agent
- dosing
- 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.)
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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
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
- B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
-
- 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
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/14—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a travelling band
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- Coating Apparatus (AREA)
- Treatment Of Fiber Materials (AREA)
- Paper (AREA)
Abstract
The invention relates to a separating agent application device (1) for the pressing belt (3) of a continuously working press, comprising an application roller (4) and dosing roller (6). Said application roller (4) can be placed against the pressing belt (3) with pressure forces defined by the amount of separating agent to be applied to the pressing belt (3). A controlling device is provided for controlling the pressure forces according to the amount of applied separating agent required each time.
Description
RELEASE-AGENT APPLICATOR
The invention relates to a release-agent applicator for the belt of a continuous-throughput press.
s Such a release-agent applicator is known where an applicator roller is pressed against a press belt where it passes over a deflecting roller to apply release agent to the press belt. The release agent prevents caking of the pressed material onto the press belts in the work area of the continuously running press. Such a continuous-throughput press has an upper and a lower endless belt which are each typically made of steel and to supported in the working region on rollers extending across heated platens so that pressure and heat can be transmitted through it to the material being pressed.
With the known release-agent applicators the release agent is sprayed through a manifold pipe onto the applicator roller. Such spraying is a problem because on the one hand it does not ensure uniform application of the release agent to the press belt and on the other 15 hand it creates a cloud of spray that is not environmentally friendly and that normally requires that specific protective measures be taken (EP 0,642,841).
In addition a coater device is known for coating metal belts with for example a plastic or lacquer layer, this coater generally comprising a doctor-blade chamber, a dosing roller, and an applicator roller. The doctor-blade chamber, dosing roller, and ao applicator roller are adjustable independently of one another (see DE 195 42 097). This development has no bearing on the actual construction of the applicator.
Finally a device is known for applying fluent media to a web or roller by means of a dip or transfer roller and an applicator roller. The applicator roller is comprised at least partially of magnetizable material, has no axial bearing, and rolls on the transfer a s roller and is movable relative to the point of application (see WO
87/01308).
It is an object of the invention to provide a release-agent applicator of the above-described type by means of which a dosed and thoroughly uniform application of the release agent on the press belt is achieved, and that is environmentally friendly and not impractical.
3 o The invention attains this object with a release-agent applicator for a moving (over a deflecting drum) press belt of a continuous-throughput press, having an applicator roller pressable against the belt (adjacent the deflecting drum), a dosing roller pressable against the applicator roller and sitting in a release-agent bath, actuators for adjustably positioning the dosing roller relative to the applicator roller and the applicator roller relative to the belt with a pressure determined by the amount of release agent to be s applied to the belt, and control means for regulating the pressures depending on the required amount of release agent. The applicator roller transfers the release agent to the belt, which normally is a steel or mesh belt. The amount of transferred release agent is determined by the extent of surface contact between the dosing roller and applicator roller and between the applicator roller and the belt and thus depends from the pressures 1 o applied so that changing the pressures applied varies the release-agent application or the amount transferred. Thus for example when a thin coating is needed to make thin pressed product, a large roller-contact area and correspondingly large pressure is needed while oppositely when a thick coating is needed for the production of thick pressed product a small roller-contact area and corresponding small pressure is needed. In both i5 cases it is possible to accurately dose and uniformly control the coating of release agent.
In addition such a release-agent applicator is environmentally friendly and eliminates the need for special protective measures.
Further inventive features are described below. Thus the applicator roller has a compressible outer layer, for example is formed as an elastomer-coated roller, in order a o to achieve an optimal release-agent transfer. The same is true also for the dosing roller that can be a raster roller, for example having a structured outer surface so as to perfectly apply the release agent to the applicator roller. According to the surface pattern on the raster roller it is also possible to influence the amount of liquid pickup.
Independently it is also possible to provide the dosing roller with a predosing doctor blade and the as applicator roller if necessary with a dosing doctor blade so that excess release agent can be scraped off. Furthermore according to the invention the pressure applied by the applicator roller and/or the dosing roller is monitored by pressure sensors, pressure bolts, pressure measurers, or pressure cans and passed as digital or analog signals through amplifiers to the control means. The positions of the rollers, for example the active and 3 o inactive positions of the applicator roller and of the dosing roller, are monitored and reported by initiators, pressure switches, and/or end switches. Also in accordance with the invention the applicator roller and the dosing roller are movable, e.g.
pivotal, into their positions, e.g. pneumatic actuators as positioning apparatus by piston-cylinder units. Thus, for example a pressure switch can produce an output when there is enough pneumatic pressure available for control. The position of the dosing roller with respect s to the applicator roller and of the applicator roller relative to the press belt can be determined for example indirectly by measuring the pressures they exert. To this end the roller actuator can be provided with a pressure sensor. The control of the applied pressure is done by means of proportional valves that control the pressure of the pneumatic cylinders. The controller takes into account a maximum level for the applied i o pressures. This maximum level is then split up into right- and left-end signals for the applicator roller and for the dosing roller. According to the invention the applicator roller and the dosing roller are driven synchronously with respect to each other and to the belt in order to prevent premature wear and damage to the roller surfaces.
According to the invention it is possible for the applicator roller or the working i5 roller and the dosing roller or its support to be independently pivotal on a frame.
According to a preferred embodiment, the applicator roller is rotatably mounted on a support that is pivotal on at least one frame and the dosing roller is rotatably mounted on at least one respective support that is pivotal on the applicator-roller support. In this manner the settings are interrelated in order in particular to be able to control the roller a o pressures reproducibly and independently of each other. It is also possible to pivot the two roller ends independently of each other in order to achieve fine control of the applied pressure over their length.
In fact a substantial feature of the invention is the independent adjustability of the supports at the ends of the applicator roller and if necessary at the ends of the dosing 25 roller tin the tenth-millimeter range relative to the steel belt along its width. In order that the positions of the applicator roller and if necessary also of the dosing roller does not cause dislocation with too great a pressure/travel difference, supports at both ends of the applicator roller and if necessary at both ends of the dosing roller support for the dosing roller are interconnected by synchronizing shafts that limit the extent of relative 3 o pivoting between the applicator-roller supports and if necessary between the applicator-roller supports. This effect can also be achieved by synchronizing or torque shafts, taking into account a predetermined bearing play with spring biasing.
Finally, the invention proposes that the release-agent bath be provided in a release-agent trough or in a doctor-blade chamber. When a doctor-blade chamber system is used, it is possible to mount the release-agent bath either underneath the rollers in horizontal orientation, or lateral of the rollers in vertical orientation.
The upper press belt as well as the lower press belt of the continuous-throughput press are provided with their own release-agent applicator, preferably at the intake end.
The invention is more closely described in the following with reference to only i o one exemplary embodiment and with reference to a drawing. It shows FIG. 1 a schematic side view of a continuous-throughput press with release-agent applicators at its intake region;
FIG. 2 a detail view of the structure of FIG. 1 in the region of the release-agent applicator for the upper press belt in the maintenance or waiting position of the dosing i5 roller and applicator roller;
FIG. 3 the structure of FIG. 1 in the active position of the dosing roller and applicator roller;
FIG. 4 a variation on the structure of FIG. 3;
FIGS. SA, SB, and SC schematically the structure of FIG. 4 in different a o operational positions;
FIG. 6 a top view of the applicator roller of FIG. 4; and FIG. 7 another variant on the structure of FIG. 3.
The drawing shows a continuous-throughput press for making wood panels and having a release-agent applicator 1 for one of two press belts 3 passing over deflecting 2 5 drums 2. To this end FIG. 1 only shows one release-agent applicator 1 for the upper press belt. In addition (or alternatively) a further (unillustrated) release-agent applicator can be provided for the lower press belt.
The release-agent applicator 1 has an applicator roller 4 that can be set against the press belt 1 for example at the upstream deflecting drum 2 and a dosing roller 6 that 3 o can be set against the applicator roller 4 and that is partially immersed in a release-agent bath 5. In addition, the release-agent applicator 1 has respective actuators 7 for adjustably pressing the dosing roller 6 against the applicator roller 4 and the applicator roller 4 against the belt 3 with a pressure determined by the amount of release agent to be applied to the belt. In addition there is an unillustrated controller for regulating the pressures in dependence on the required amount of release agent.
s The release-agent bath 5 according to FIGS. 2 and 3 sits in a release agent trough 8. The applicator roller 4 has a compressible outer layer 9 and thus is constructed as an elastomer-coated roller. The dosing roller 6 is a raster roller with structured surface. In addition, a predosing doctor blade 10 is juxtaposed with the dosing roller 6 and a dosing doctor blade 11 with the applicator roller 4. The contact pressures of the applicator io roller 4 and to the dosing roller 6 are determined in this embodiment by pressure sensors and transmitted via amplifiers as electrical signals to the controller. The illustrated roller positions, that is the active position (FIG. 3) and the maintenance position (FIG. 2) of the applicator roller 4 and dosing roller 6 are continuously reported and monitored by initiators, pressure switches and/or end switches. The maintenance position of FIG. 2 is i5 also a rest position for the case when the release-agent applicator is not needed, e.g.
while production is stopped. For movement from the active to the rest position it is preferred to first pivot the two rollers 4 and 6 together away from the belt 3 and to then pivot the dosing roller 6 away from the applicator roller 4.
The applicator roller 4 and the dosing roller 6 are pivoted by respective piston-ao cylinder units. e.g. pneumatic actuators 7 into their positions.
Servomotors drive the applicator roller 4 and the dosing roller 6 synchronously with each other and with the press belt 3.
While as shown in FIGS. 2 and 3, the working roller 4 and the dosing roller 6 are movable independently of each other via one or more supports by respective piston-a5 cylinder units 7, FIG. 4 shows an embodiment where the applicator roller 4 is rotatably supported on one or more supports 12 that are pivoted on a frame 13 fixed to a roller support W, while the dosing roller 6 is rotatable on supports 14 that are pivotal on the applicator-roller supports 12. Thus the dosing roller is not completely independently mounted on the base, but is carried on the applicator-roller support 12. The applicator-3 o roller support 12 thus can be an L-shaped beam. A comparison of FIG. 4 with FIGS.
SA, SB, and SC also shows how the rollers 4 and 6 are shifted from the active position to the inactive position. To start, the first piston-cylinder unit 7a pivots the applicator-roller support 12 so that the applicator roller 4 and the dosing roller 6 are jointly pivoted back (FIG. SB). Then actuation of the second piston-cylinder unit 7b pivots back the dosing-roller support 14 without moving the applicator roller 4 (see FIG. SC).
s Furthermore, FIG. 6 is an embodiment where the two ends of the applicator roller 4 are pivotal independently of each other so as to control the applied pressure over its length. To this end the applicator roller 4 is mounted at both ends in pivotal bearings 15. In order to limit the extent of pivoting on the right and left sides, there is a synchronizing shaft 16 that prevents one of the journals 15 from swinging completely io out. The same or a similar device can also be provided for the dosing roller 6.
Finally, FIG. 7 shows a variation on the invention where the release-agent bath 5 is positioned in a doctor-blade chamber 17. The dosing roller 6 is partially immersed in the release agent in the chamber and the chamber is defined by two doctor blades 18.
The use of a doctor-blade system makes it possible to vary the coating thickness. In this i 5 embodiment the doctor-blade unit 17 is underneath the dosing roller 6 and thus extends generally horizontally. In another embodiment it would be possible to arrange the doctor-blade unit vertically so that it is on the side of the dosing roller.
This embodiment is not shown in the figures.
The invention relates to a release-agent applicator for the belt of a continuous-throughput press.
s Such a release-agent applicator is known where an applicator roller is pressed against a press belt where it passes over a deflecting roller to apply release agent to the press belt. The release agent prevents caking of the pressed material onto the press belts in the work area of the continuously running press. Such a continuous-throughput press has an upper and a lower endless belt which are each typically made of steel and to supported in the working region on rollers extending across heated platens so that pressure and heat can be transmitted through it to the material being pressed.
With the known release-agent applicators the release agent is sprayed through a manifold pipe onto the applicator roller. Such spraying is a problem because on the one hand it does not ensure uniform application of the release agent to the press belt and on the other 15 hand it creates a cloud of spray that is not environmentally friendly and that normally requires that specific protective measures be taken (EP 0,642,841).
In addition a coater device is known for coating metal belts with for example a plastic or lacquer layer, this coater generally comprising a doctor-blade chamber, a dosing roller, and an applicator roller. The doctor-blade chamber, dosing roller, and ao applicator roller are adjustable independently of one another (see DE 195 42 097). This development has no bearing on the actual construction of the applicator.
Finally a device is known for applying fluent media to a web or roller by means of a dip or transfer roller and an applicator roller. The applicator roller is comprised at least partially of magnetizable material, has no axial bearing, and rolls on the transfer a s roller and is movable relative to the point of application (see WO
87/01308).
It is an object of the invention to provide a release-agent applicator of the above-described type by means of which a dosed and thoroughly uniform application of the release agent on the press belt is achieved, and that is environmentally friendly and not impractical.
3 o The invention attains this object with a release-agent applicator for a moving (over a deflecting drum) press belt of a continuous-throughput press, having an applicator roller pressable against the belt (adjacent the deflecting drum), a dosing roller pressable against the applicator roller and sitting in a release-agent bath, actuators for adjustably positioning the dosing roller relative to the applicator roller and the applicator roller relative to the belt with a pressure determined by the amount of release agent to be s applied to the belt, and control means for regulating the pressures depending on the required amount of release agent. The applicator roller transfers the release agent to the belt, which normally is a steel or mesh belt. The amount of transferred release agent is determined by the extent of surface contact between the dosing roller and applicator roller and between the applicator roller and the belt and thus depends from the pressures 1 o applied so that changing the pressures applied varies the release-agent application or the amount transferred. Thus for example when a thin coating is needed to make thin pressed product, a large roller-contact area and correspondingly large pressure is needed while oppositely when a thick coating is needed for the production of thick pressed product a small roller-contact area and corresponding small pressure is needed. In both i5 cases it is possible to accurately dose and uniformly control the coating of release agent.
In addition such a release-agent applicator is environmentally friendly and eliminates the need for special protective measures.
Further inventive features are described below. Thus the applicator roller has a compressible outer layer, for example is formed as an elastomer-coated roller, in order a o to achieve an optimal release-agent transfer. The same is true also for the dosing roller that can be a raster roller, for example having a structured outer surface so as to perfectly apply the release agent to the applicator roller. According to the surface pattern on the raster roller it is also possible to influence the amount of liquid pickup.
Independently it is also possible to provide the dosing roller with a predosing doctor blade and the as applicator roller if necessary with a dosing doctor blade so that excess release agent can be scraped off. Furthermore according to the invention the pressure applied by the applicator roller and/or the dosing roller is monitored by pressure sensors, pressure bolts, pressure measurers, or pressure cans and passed as digital or analog signals through amplifiers to the control means. The positions of the rollers, for example the active and 3 o inactive positions of the applicator roller and of the dosing roller, are monitored and reported by initiators, pressure switches, and/or end switches. Also in accordance with the invention the applicator roller and the dosing roller are movable, e.g.
pivotal, into their positions, e.g. pneumatic actuators as positioning apparatus by piston-cylinder units. Thus, for example a pressure switch can produce an output when there is enough pneumatic pressure available for control. The position of the dosing roller with respect s to the applicator roller and of the applicator roller relative to the press belt can be determined for example indirectly by measuring the pressures they exert. To this end the roller actuator can be provided with a pressure sensor. The control of the applied pressure is done by means of proportional valves that control the pressure of the pneumatic cylinders. The controller takes into account a maximum level for the applied i o pressures. This maximum level is then split up into right- and left-end signals for the applicator roller and for the dosing roller. According to the invention the applicator roller and the dosing roller are driven synchronously with respect to each other and to the belt in order to prevent premature wear and damage to the roller surfaces.
According to the invention it is possible for the applicator roller or the working i5 roller and the dosing roller or its support to be independently pivotal on a frame.
According to a preferred embodiment, the applicator roller is rotatably mounted on a support that is pivotal on at least one frame and the dosing roller is rotatably mounted on at least one respective support that is pivotal on the applicator-roller support. In this manner the settings are interrelated in order in particular to be able to control the roller a o pressures reproducibly and independently of each other. It is also possible to pivot the two roller ends independently of each other in order to achieve fine control of the applied pressure over their length.
In fact a substantial feature of the invention is the independent adjustability of the supports at the ends of the applicator roller and if necessary at the ends of the dosing 25 roller tin the tenth-millimeter range relative to the steel belt along its width. In order that the positions of the applicator roller and if necessary also of the dosing roller does not cause dislocation with too great a pressure/travel difference, supports at both ends of the applicator roller and if necessary at both ends of the dosing roller support for the dosing roller are interconnected by synchronizing shafts that limit the extent of relative 3 o pivoting between the applicator-roller supports and if necessary between the applicator-roller supports. This effect can also be achieved by synchronizing or torque shafts, taking into account a predetermined bearing play with spring biasing.
Finally, the invention proposes that the release-agent bath be provided in a release-agent trough or in a doctor-blade chamber. When a doctor-blade chamber system is used, it is possible to mount the release-agent bath either underneath the rollers in horizontal orientation, or lateral of the rollers in vertical orientation.
The upper press belt as well as the lower press belt of the continuous-throughput press are provided with their own release-agent applicator, preferably at the intake end.
The invention is more closely described in the following with reference to only i o one exemplary embodiment and with reference to a drawing. It shows FIG. 1 a schematic side view of a continuous-throughput press with release-agent applicators at its intake region;
FIG. 2 a detail view of the structure of FIG. 1 in the region of the release-agent applicator for the upper press belt in the maintenance or waiting position of the dosing i5 roller and applicator roller;
FIG. 3 the structure of FIG. 1 in the active position of the dosing roller and applicator roller;
FIG. 4 a variation on the structure of FIG. 3;
FIGS. SA, SB, and SC schematically the structure of FIG. 4 in different a o operational positions;
FIG. 6 a top view of the applicator roller of FIG. 4; and FIG. 7 another variant on the structure of FIG. 3.
The drawing shows a continuous-throughput press for making wood panels and having a release-agent applicator 1 for one of two press belts 3 passing over deflecting 2 5 drums 2. To this end FIG. 1 only shows one release-agent applicator 1 for the upper press belt. In addition (or alternatively) a further (unillustrated) release-agent applicator can be provided for the lower press belt.
The release-agent applicator 1 has an applicator roller 4 that can be set against the press belt 1 for example at the upstream deflecting drum 2 and a dosing roller 6 that 3 o can be set against the applicator roller 4 and that is partially immersed in a release-agent bath 5. In addition, the release-agent applicator 1 has respective actuators 7 for adjustably pressing the dosing roller 6 against the applicator roller 4 and the applicator roller 4 against the belt 3 with a pressure determined by the amount of release agent to be applied to the belt. In addition there is an unillustrated controller for regulating the pressures in dependence on the required amount of release agent.
s The release-agent bath 5 according to FIGS. 2 and 3 sits in a release agent trough 8. The applicator roller 4 has a compressible outer layer 9 and thus is constructed as an elastomer-coated roller. The dosing roller 6 is a raster roller with structured surface. In addition, a predosing doctor blade 10 is juxtaposed with the dosing roller 6 and a dosing doctor blade 11 with the applicator roller 4. The contact pressures of the applicator io roller 4 and to the dosing roller 6 are determined in this embodiment by pressure sensors and transmitted via amplifiers as electrical signals to the controller. The illustrated roller positions, that is the active position (FIG. 3) and the maintenance position (FIG. 2) of the applicator roller 4 and dosing roller 6 are continuously reported and monitored by initiators, pressure switches and/or end switches. The maintenance position of FIG. 2 is i5 also a rest position for the case when the release-agent applicator is not needed, e.g.
while production is stopped. For movement from the active to the rest position it is preferred to first pivot the two rollers 4 and 6 together away from the belt 3 and to then pivot the dosing roller 6 away from the applicator roller 4.
The applicator roller 4 and the dosing roller 6 are pivoted by respective piston-ao cylinder units. e.g. pneumatic actuators 7 into their positions.
Servomotors drive the applicator roller 4 and the dosing roller 6 synchronously with each other and with the press belt 3.
While as shown in FIGS. 2 and 3, the working roller 4 and the dosing roller 6 are movable independently of each other via one or more supports by respective piston-a5 cylinder units 7, FIG. 4 shows an embodiment where the applicator roller 4 is rotatably supported on one or more supports 12 that are pivoted on a frame 13 fixed to a roller support W, while the dosing roller 6 is rotatable on supports 14 that are pivotal on the applicator-roller supports 12. Thus the dosing roller is not completely independently mounted on the base, but is carried on the applicator-roller support 12. The applicator-3 o roller support 12 thus can be an L-shaped beam. A comparison of FIG. 4 with FIGS.
SA, SB, and SC also shows how the rollers 4 and 6 are shifted from the active position to the inactive position. To start, the first piston-cylinder unit 7a pivots the applicator-roller support 12 so that the applicator roller 4 and the dosing roller 6 are jointly pivoted back (FIG. SB). Then actuation of the second piston-cylinder unit 7b pivots back the dosing-roller support 14 without moving the applicator roller 4 (see FIG. SC).
s Furthermore, FIG. 6 is an embodiment where the two ends of the applicator roller 4 are pivotal independently of each other so as to control the applied pressure over its length. To this end the applicator roller 4 is mounted at both ends in pivotal bearings 15. In order to limit the extent of pivoting on the right and left sides, there is a synchronizing shaft 16 that prevents one of the journals 15 from swinging completely io out. The same or a similar device can also be provided for the dosing roller 6.
Finally, FIG. 7 shows a variation on the invention where the release-agent bath 5 is positioned in a doctor-blade chamber 17. The dosing roller 6 is partially immersed in the release agent in the chamber and the chamber is defined by two doctor blades 18.
The use of a doctor-blade system makes it possible to vary the coating thickness. In this i 5 embodiment the doctor-blade unit 17 is underneath the dosing roller 6 and thus extends generally horizontally. In another embodiment it would be possible to arrange the doctor-blade unit vertically so that it is on the side of the dosing roller.
This embodiment is not shown in the figures.
Claims (12)
1. A release-agent applicator (1) for a moving press belt (3) of a continuous-throughput press, having an applicator roller (4) pressable against the belt (3), a dosing roller (4) pressable against the applicator roller (4) and dipping into a release-agent bath (5), actuators (7) for adjustably positioning the dosing roller (6) relative to the applicator roller (4) and the applicator roller (4) relative to the belt (8) with a contact pressure determined by the amount of release agent to be applied to the belt (3), and control means for regulating the contact pressures depending on the required amount of release agent.
2. The release-agent applicator (1) according to claim 1, characterized in that the applicator roller (4) has a compressible outer layer (9), for example is formed as an elastomer-coated roller.
3. The release-agent applicator (1) according to claim 1 or 2, characterized in that the dosing roller (6) is a raster roller, for example having a structured outer surface.
4. The release-agent applicator (1) according to one of claims 1 to 3, characterized in that the dosing roller (6) has a predosing doctor blade (10) and the applicator roller (4) has a dosing doctor blade (11).
5. The release-agent applicator (1) according to one of claims 1 to 4, characterized in that the pressure applied by the applicator roller (4) and/or the dosing roller (6) is monitored by pressure sensors, pressure bolts, pressure sensing supports, or pressure cans and passed through amplifiers and converted into signals for the control means.
6. The release-agent applicator (1) according to one of claims 1 to 5, characterized in that the positions of the rollers, for example the active and maintenance positions of the applicator roller (4) and of the dosing roller (6), are monitored and reported by initiators, pressure switches, and/or end switches.
7 7. The release-agent applicator (1) according to one of claims 1 to 6, characterized in that the applicator roller (4) and the dosing roller (6) are movable into their positions, e.g. pivotal, by piston-cylinder units, e.g. pneumatic actuators (7, 7a, 7b) as positioning apparatus.
8. The release-agent applicator (1) according to one of claims 1 to 7, characterized in that the pressure applied by the applicator roller (4) and the dosing roller (6) is controlled or regulated by proportional valves.
9. The release-agent applicator (1) according to one of claims 1 to 8, characterized in that the applicator roller (4) and the dosing roller (6) are driven synchronously with respect to each other and to the belt.
10. The release-agent applicator (1) according to one of claims 1 to 10, characterized in that the applicator roller (4) is rotatably mounted on a support (12) that is pivotal on at least one frame (13) and that the dosing roller (6) is rotatably mounted on at least one respective support (14) that is pivotal on the applicator-roller support (12).
11. The release-agent applicator (1) according to one of claims 1 to 10, characterized in that supports (12) at both ends of the applicator roller (4) and if necessary at both ends of the dosing roller support (14) for the dosing roller (6) are connected by synchronizing shafts (16) that limit the extent of relative pivoting between the applicator-roller supports (12) and if necessary between the applicator-roller supports (14).
12. The release-agent applicator (1) according to one of claims 1 to 11, characterized in that the release-agent bath (5) is provided in a release-agent trough (8) or in a doctor-blade chamber (17).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10337594.5 | 2003-08-16 | ||
| DE10337594A DE10337594B4 (en) | 2003-08-16 | 2003-08-16 | Release agent application means |
| PCT/EP2004/009097 WO2005018827A1 (en) | 2003-08-16 | 2004-08-13 | Separating agent application device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2535954A1 true CA2535954A1 (en) | 2005-03-03 |
Family
ID=34177611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002535954A Abandoned CA2535954A1 (en) | 2003-08-16 | 2004-08-13 | Release-agent applicator |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1654073A1 (en) |
| CN (1) | CN1835808A (en) |
| CA (1) | CA2535954A1 (en) |
| DE (1) | DE10337594B4 (en) |
| WO (1) | WO2005018827A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005021059A1 (en) | 2005-05-06 | 2006-11-09 | Goldschmidt Gmbh | Process for the production of moldings from cellulose-containing materials |
| EP1785195A1 (en) * | 2005-11-15 | 2007-05-16 | DeMaxZ AG | Process and device and to print on a profiled object |
| BRPI0713227A2 (en) * | 2006-07-05 | 2012-03-27 | Fitch Engineering Pty Ltd | roller support and roller coating device |
| DE102006036492B3 (en) * | 2006-08-04 | 2007-10-04 | Print Consulting Hicker | Separating agent applying device for manufacturing e.g. polyurethane hard foam plate, has rotatable brush attached to applying areas of manufacturing device, and bunch of hydrophilic bristles defined and spaced apart for cleaning areas |
| ITPD20080108A1 (en) | 2008-04-09 | 2009-10-10 | Monti Antonio Spa | FILM SPREADER DEVICE GLUEING ON FABRICS, MEMBRANES OR SIMILAR |
| DE102009047764A1 (en) | 2009-12-10 | 2011-06-16 | Evonik Goldschmidt Gmbh | Release agent and use for the production of composite moldings |
| CN102211071B (en) * | 2010-04-09 | 2013-08-07 | 潘声君 | Double-wheel transmission type edge oiling machine head for automatic edge oiling machine |
| SE535994C2 (en) * | 2011-03-03 | 2013-03-19 | Mattssonfoeretagen I Uddevalla Ab | Method and apparatus for dosing and coating |
| DE102012204878A1 (en) * | 2012-03-27 | 2013-10-02 | Achenbach Buschhütten GmbH & Co. KG | commissioned |
| DE102014104340A1 (en) | 2014-03-27 | 2015-10-01 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Method and apparatus for continuously applying a liquid to a substrate |
| DE202014101461U1 (en) | 2014-03-27 | 2015-07-03 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Apparatus for continuously applying a liquid to a substrate |
| DE202017103098U1 (en) | 2017-05-22 | 2018-06-26 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Apparatus for continuously applying a wetting agent to a moving substrate |
| DE102017111177B4 (en) | 2017-05-22 | 2019-05-16 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Apparatus and method for continuously applying a wetting agent to a moving substrate |
| DE102017111175B3 (en) | 2017-05-22 | 2018-06-28 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Apparatus for applying a wetting agent to a moving substrate |
| DE102017111173B4 (en) | 2017-05-22 | 2019-10-17 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Apparatus for continuously applying a release agent to a circulating belt |
| EP3456498B1 (en) | 2017-09-19 | 2021-11-03 | Homann Holzwerkstoffe GmbH | System of corrugated sheet |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2868162A (en) * | 1957-05-01 | 1959-01-13 | Gen Electric | Endless belt paint applicator |
| SE427805B (en) * | 1978-12-20 | 1983-05-09 | Inventing Ab | SET AND ESTABLISHMENT FOR OPTIONAL TREATMENT, SUCH AS SINGLE OR DOUBLE COATING, IMPREGNATION OR SURFACE OF A CURRENT COAT. |
| GB2074053A (en) * | 1980-04-21 | 1981-10-28 | Vickers Ltd | Coating apparatus |
| DE3117341C2 (en) * | 1981-05-02 | 1988-07-07 | Albert-Frankenthal Ag, 6710 Frankenthal | Inking unit |
| JPS59216656A (en) * | 1983-05-25 | 1984-12-06 | Chugai Ro Kogyo Kaisha Ltd | Apparatus for automatically controlling coating amount of coating machine |
| AT384960B (en) * | 1985-08-30 | 1988-02-10 | Zimmer Johannes | DEVICE FOR THE DOSED APPLICATION OF FLOWABLE MEDIA ON A RAILWAY |
| US5437760A (en) * | 1993-09-13 | 1995-08-01 | General Electric Company | Press belt applicator for a continuous belt press |
| US5476683A (en) * | 1994-09-12 | 1995-12-19 | Macmillan Bloedel Limited | Coater startup |
| US5743964A (en) * | 1995-01-24 | 1998-04-28 | Fata Hunter, Inc. | Roll coating system |
| DE19542097C2 (en) * | 1995-11-11 | 1997-10-16 | Hans Josef May | Device for coating metal strips |
-
2003
- 2003-08-16 DE DE10337594A patent/DE10337594B4/en not_active Expired - Fee Related
-
2004
- 2004-08-13 WO PCT/EP2004/009097 patent/WO2005018827A1/en not_active Application Discontinuation
- 2004-08-13 CA CA002535954A patent/CA2535954A1/en not_active Abandoned
- 2004-08-13 EP EP04764092A patent/EP1654073A1/en not_active Withdrawn
- 2004-08-13 CN CNA2004800235001A patent/CN1835808A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE10337594B4 (en) | 2006-03-23 |
| EP1654073A1 (en) | 2006-05-10 |
| CN1835808A (en) | 2006-09-20 |
| DE10337594A1 (en) | 2005-03-10 |
| WO2005018827A1 (en) | 2005-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |