JP2007503371A - Nozzle, apparatus and method for applying adhesive on paper web, and method for improving the operational function of such nozzle - Google Patents

Abstract

A nozzle (36) for applying an adhesive agent onto a paper web (1) with a protecting device for protecting the nozzle from contaminations by means of compressed air, said protecting device comprises a member for defining a space (47) enclosing the nozzle, a member for supplying air into the space, and a member for discharging said air from the space in a position centrally in front of and at a distance from a front end surface (37) of the nozzle. According to the invention the air supply member is arranged to supply air when the nozzle is in a state of rest between two successive applications of adhesive agent. The invention also relates to a device and a method of applying the adhesive agent onto a paper web by means of several such nozzles. The invention also relates to a method of improving the operational function of said nozzles.

Description

  The present invention relates to a nozzle suitable for application of adhesive on a moving paper web. The nozzle is provided with a protection device configured to protect the nozzle with compressed air from particulates and contaminants that hinder operation. The protection device is a member for defining a free space surrounding the nozzle, a member for supplying air into the space, and a center line spaced from the front end surface of the nozzle for discharging air from the space. It has a member.

  The invention also relates to an apparatus for applying an adhesive on a moving paper web. A plurality of nozzles provided in this device are provided with a protection device configured to protect the particulates and contaminants that hinder operation with compressed air. The protection device is a member for defining a free space surrounding the nozzle, a member for supplying air into the space, and a center line spaced from the front end surface of the nozzle for discharging air from the space. It has a member.

  The invention also relates to a method of applying an adhesive by means of a nozzle onto a moving paper web. The method comprises the step of protecting the nozzle from particulate contaminants from the surrounding environment with a protective device while supplying compressed air to improve the working function of the nozzle. This protecting step arranges a defined space surrounding the nozzle, supplies air into the defined space, and exhausts the air through an opening arranged at a distance in front of the nozzle. Having stages.

  The invention also relates to a method for improving the operating function of a nozzle suitable for applying an adhesive on a moving paper web. The method includes the step of protecting the nozzle from particulate contaminants from the surrounding environment with a protective device while supplying compressed air. This protecting step arranges a defined space surrounding the nozzle, supplies air into the defined space, and exhausts the air through an opening arranged at a distance in front of the nozzle. Having stages.

  Although not limited thereto, the present invention can be applied particularly to a paper web that moves when reels are exchanged in a winding section of a paper machine. Further, the present invention can be applied to a winder or a reel packaging machine in all types of paper manufacturing machines and paper handling machines.

  In the present invention, the expression “adhesive” is to be understood in its broadest sense, and usually does not itself have a sticky or adhesive feel, but a paper web and, for example, a reel shaft. It is intended to include agents that provide an adhesive effect when in contact with each other. One example of such an adhesive is water.

  An apparatus for applying an adhesive is known from Swedish patent publication SE509117C2.

  Place the device for applying the adhesive close to the place where the winding of the web occurs to replace the reel shaft, i.e. the cylinder supporting the reel and the empty reel shaft abutting against this reel Has many production technology advantages. However, the environment at this position of web wrapping is highly undesirable in order to be able to operate the nozzle in a satisfactory manner over any long term. The cause of this unfavorable environment is due to the combination of the presence of a large amount of air pollutants, mainly in the form of dust particles consisting of fibers and fiber fragments split from the web, and the strong air flow impinging on the nozzles, which constantly dusts Will adhere to and accumulate in a thick layer, causing air and adhesive passages in the nozzle to become clogged at its outlet, during which the nozzle's function deteriorates and eventually becomes blocked. Meaning and costly outage. This undesirable effect is accelerated by the fact that the temperature in the environment in question is relatively high and the dust particles are charged, increasing the tendency of them to be attracted to the nozzle.

  The object of the present invention is to substantially improve the operating function when applying the adhesive in order to avoid unwanted failures in the winding process.

  The nozzle according to the invention is characterized by the fact that the air supply member is configured to supply air when the nozzle is at rest between two successive adhesive applications.

  The device according to the invention is characterized in that the air supply member of each nozzle is configured to supply air when the nozzle is in a rest state between two successive adhesive applications.

  The method of applying adhesive according to the present invention is characterized by the fact that the supply and discharge of air occurs when the nozzle is at rest between two successive adhesive applications.

  The method of improving the operating function of the nozzle according to the invention is characterized by the fact that air supply and discharge occurs when the nozzle is at rest between two successive adhesive applications.

The present invention is described below with reference to the drawings.

  1 and 2 show a winding unit of a paper machine for producing a paper web 1. The stand 2 provided in the winding unit has two upright columns 3 and 4 and a movable support member 5 which is rotatably mounted on a bearing on the stand 2 and is composed of a support cylinder in the illustrated embodiment. is doing. Or this support member can be comprised from an endless support belt. The winding unit includes an upper supply unit (not shown) that supplies an empty reel shaft 6 and a lowering arm (not shown) that is rotatably attached to a bearing on the stand 2. The lowering arm is brought into a state in which the reel shaft 6 interacts with the support cylinder 5 so that a sandwiching portion between which the reel shaft 6 and the support cylinder 5 are driven at the same peripheral speed is formed. At the same time, the new or empty reel shaft 6 is lowered relative to the main system (not shown) for supporting and driving the new reel shaft 6. FIG. 2 also shows the paper roll 7 gradually increasing towards its final dimension.

  The winding unit is provided with a device 8 for applying an adhesive. This device has a support structure 9 that is attached to the stand 2 of the take-up section upstream of the support cylinder 5 and that extends transversely to the longitudinal direction of the machine. In the illustrated embodiment, the support structure 9 is composed of two rigidly attached horizontal support beams that extend between two upstanding stand columns 3, 4. Furthermore, the device 8 for applying adhesive comprises a plurality of nozzle members 14 arranged along a line extending transversely to the longitudinal direction of the machine, and attaching these nozzle members 14 to the support beam 9. For mounting. This attachment device has three brackets 10 (see FIGS. 1 and 3) each having a horizontal portion 11 and a portion 12 that is directed obliquely upward, and each bracket 10 has a horizontal portion 11 thereof. It is firmly attached to the horizontal support beam 9. The mounting bracket portion 12 directed obliquely upward supports an inclined dust shield 13 extending in the transverse direction with respect to the longitudinal direction of the machine, and the lower horizontal edge portion of the dust shield 13 is a bracket. It is arranged at a distance above the tip of 10.

  The mounting device has a horizontal, elongated rod 15 that extends transversely to the longitudinal direction of the machine below the bracket 10 and is parallel to the support beam 9, and The bracket 10 is firmly attached to the lower side of the bracket 10 and is rotatably attached to three bearing elements 16 extending downward. Associated with each bearing element 16 is a bearing member which can be arranged on the rod 15 itself or alternatively on the bearing element 16 so that the rod 15 can easily rotate about its central axis. . These bearing members can be, for example, general sliding bearings, ball bearings, or roller bearings. An actuator 17 for rotating the rod 15 is disposed at each end of the rod 15, thereby forming a rotation axis. In the illustrated embodiment, each actuator 17 comprises a pneumatic cylinder, the rear end of which is pivotally supported by a bearing on the mounting element 18 and is firmly attached to the support beam 9 in turn. The pneumatic cylinder 17 has a piston rod 19 that can protrude from the front end portion thereof and is pivotally connected to the link arm 20. In turn, the pneumatic cylinder 17 is firmly connected to the associated end portion of the rotation shaft of the rod 15. Yes. Reference numeral 21 denotes a stopper element that is firmly attached to the horizontal mounting bracket portion 11 and interacts with the link arm 20 to limit the rotation of the rotary shaft 15. When the pneumatic cylinder 17 is activated, the rotary shaft 15 rotates clockwise or counterclockwise.

  The nozzle member 14 is evenly distributed so that the adhesive can be applied over the entire width of the web 1, i.e. inside the surface area extending between the parallel edges of the web perpendicular to the longitudinal direction of the machine. Has been.

  The attachment device includes a plurality of support bodies 23 that respectively support the nozzle member 14 and the link arm 25, and they are firmly attached to the support body 23 in the same manner as the rotation shaft 15. This rigid connection can be achieved by any suitable method, for example by means of a suitable locking member forming an engagement or also a clamping joint. The rigid connection between the link arm 25 and the rotating shaft 15 is not shown in detail. In the illustrated embodiment, the rigid connection between each link arm 25 and its associated support body 23 is secured to the support body 23 by a horizontal support pin 31 protruding from the link arm 25 and firmly attached thereto. And a lockable two-part clamping device 32 that clamps the support pin 31. Reference numeral 34 indicates a pipe for supplying an adhesive to the nozzle member 14 via the support body 23. It will be understood that a rotary unit is obtained by a rigid connection comprising the rotary shaft 15 and all the link arms 25, the support body 23 and the nozzle member 14.

  Each nozzle member 14 has a connection portion 35 and a nozzle 36 attached therein. A first embodiment of the nozzle 36 is schematically shown in FIGS. The nozzle 36 has a flat front end surface 37 and a straight central channel 38 for supplying adhesive, and includes a rear channel portion 39 and a front channel portion 40 that terminates at the front end surface 37. ing. The front channel portion 40 has a predetermined length and a predetermined relatively small diameter so that when the nozzle 36 is in a non-actuated state, shown as resting in the illustrated embodiment, the front channel portion. The non-pressurized adhesive of the portion 40 can be held in it without dripping off by capillary action. The connecting portion 35 of the nozzle member 14 has a channel for an adhesive (not shown), which channel is an adhesive (not shown) inside the rear channel portion 39 and the support body 23 in the nozzle 36. To the outer pipe 34 for the adhesive described above. The central needle valve 41 is located inside the rear channel portion 39 to open and close the entrance to the narrow front channel portion 40 and is connected to an actuator (not shown) to a closed position (see FIG. 9). ) And the open position (see FIG. 10).

  Further, the nozzle 36 is connected to a common outer pipe 56 for supplying air and has a front channel portion 43, and terminates at the front surface 37 at the same distance from the outlet of the front channel portion 40. A plurality of air channels 42 are provided. The front channel portions 43 are each oriented obliquely with respect to the center line 44 of the nozzle 36, so that the discharged air jet 45 is connected to the center line 44 described above on the extension of the discharge port of the front channel portion 40. Do not cross each other and do not cross each other.

  Each nozzle member 14 is provided with a protective device arranged to protect the nozzles 36 from contaminants or dust particles such as dust consisting mainly of fibers or fiber fragments split from the web. In the illustrated embodiment, the protection device has a protective cover 46 with an inner free space 47 surrounding the nozzle 36. This protective cover 46 is pivotably and freely connected to the connecting portion 35 so that it can be opened and removed to clean the inside of the nozzle 36 and the protective cover 46 when deemed necessary. Connected freely. An outer pipe 48 is connected to the upper part of the protective cover 46, and air is supplied to the inside of the space 47 through the inlet 49. The front wall 51 of the protective cover 46 is coaxially disposed below the front end surface 37 of the nozzle 36 and has a diameter somewhat larger than the diameter of the coaxial circle in which the discharge port of the front channel portion 43 is disposed inside. The circular outlet 50 on the center line is provided so as not to adversely affect the air jet 45 flowing outward. The front wall 51 is disposed at a predetermined axial distance from the front end surface 37 of the nozzle 36.

  In addition, the device for applying the adhesive may have a nozzle 36 in order to receive the adhesive that is intentionally released from the nozzle 36 in certain situations when these nozzles are placed in an up-down pause or idle state. A member 52 for collecting the adhesive is disposed directly below. In the illustrated embodiment, the collection device 52 is a plurality of cups that are rigidly disposed on the bracket 10 and are rigidly disposed on a support bar 54 that extends horizontally laterally and open upward. A container 53 is provided. These cups 53 have a length suitable for one nozzle member 14. The upwardly opening cups 53 are designed and arranged to receive the protective cover 46 supported by the nozzle member 14 and rotate downward to their vertical position where the nozzle member 14 is at rest. When moved, the central outlet 50 on the lower side of the protective cover 46 is arranged at an appropriate distance from the bottom of the cup 53 so that air flowing out of the protective cover 46 can further flow out of the cup 53. .

  The device for applying the adhesive works for the existing pneumatic cylinder 17 and supplies air to the nozzle member 14 via the pipes 36, 48 connected to the nozzle 36, the protective cover 46 and the pump 55, A compressed air supply source (not shown) is further provided for supplying the adhesive from the hot adhesive supply source (not shown) to the nozzle 36 via the pipe 34. Further, an adhesive is applied to the upstream position of the nozzle member 14 by operating an existing function at different time points and at different time intervals with an electric heating device 57 for maintaining the adhesive at a desired operating temperature. A control device (not shown) configured to control the process is provided. This control device is then controlled by a winding process in the winding section associated with paper roll switching and possible web breakage.

  The controller is programmed to control the process of applying the adhesive in connection with paper roll switching. The switching can occur by so-called full winding or so-called wide tip winding. Here, the tip having a predetermined width, which is usually 400 to 600 millimeters, is obtained by removing the tip from the web in front of the support cylinder 5. When performing winding of the wide tip, those nozzles 36 located outside the tip are cut off.

  While the paper machine is in operation, while the web 1 is being wound onto the reel shaft 6, the nozzles 36, while directing their channels 38 for adhesive perpendicular to the bottom of the collection cup 53. It is arranged at the side rest position. In this procedure, air is blown through the protective cover 46 to prevent dust from entering the nozzles 36 and through these air channels to keep the air channel 42 outlet clean. For example, by winding the full web 1 around the empty reel shaft 6, when the paper roll is switched, the reel shaft is lowered to the winding position and the nozzle member 14 is moved to their application position. And the channel 38 for the adhesive of the nozzle 36 is oriented vertically or nearly perpendicular to the web 1. When the empty reel shaft 6 comes into contact with the support cylinder 5, the secondary carriage (not shown) of the winding unit moves forward by a small distance and brakes for a short time, and at the same time, the blow pipe 58 is connected and supported. A slack 59 (see FIG. 2) of the web 1 is formed in the space obtained between the cylinder 5 and the finished paper roll 7, and air is blown from the blow pipe 58 so as to be lifted up while forming a so-called balloon. This acts on the sag 59. Thereafter, the air supply to the air channel 42 of the nozzle 36 increases, and the air supply to the protective cover 46 is stopped. The discharge of the adhesive is started simultaneously with the start of balloon blowing or after a few seconds, for example, within a time interval of 0 to 60 seconds.

  Adhesive discharge occurs within at least 1 second, usually at most 10 seconds. The adhesive is applied to the entire surface of the web 1, that is, to the surface area of the web 1 that extends from edge to edge perpendicular to the longitudinal direction of the machine. The adhesive causes the web 1 to adhere to the new reel shaft 6, the web 1 follows around it, and the tensile force generated on the web 1 between the finished paper roll 7 and the new, just wound reel shaft 6. As a result, it is pulled away later. The blow pipe 58 for blowing up the balloon is cut off, and as soon as the application of the adhesive is completed, the nozzle member 14 rotates and returns to its rest position. The air flow through the air channel 42 of the nozzle 36 is reduced and the air supply to the inside of the protective cover 46 is resumed. In this way, the nozzle 36 is maintained in a state ready to perform a new application of adhesive that is to occur at a predetermined time, eg, 20 minutes after performing the winding.

  In the above-described embodiment, the nozzle 36 has a rest position where the channel 38 for the adhesive is directed in the vertical direction, and the nozzle 36 is rotated upward by rotating the rotary shaft 15 so that the channel for the adhesive is provided. 38 is configured to take a coating position that forms an angle substantially perpendicular to the web 1. In the rest position, the adhesive is held in the channel portion 40 by the action of capillarity. At a relatively low speed sufficient to keep them open, the air flows through the air channel 42 to prevent dust particles from sticking to the outlet of the air channel 42 by the outflowing air. However, the outflowing air flow is at such a speed as to adversely affect the adhesive inside the front channel portion 40, where the adhesive is drawn and dried and the outlet is clogged by the hardened adhesive. Must not. The air flowing through the protective cover 46 that flows out of the discharge port 50 around the nozzle 36 has a velocity at the discharge port 50 of, for example, about 10 m / second in order to prevent dust particles from entering the protective cover 46. s must be sufficient. This arrangement and these means ensure that the nozzle 36 is ready for operation until the next application that occurs after a relatively long time after the previous application has occurred. If for some reason a paper production shutdown occurs and the nozzle is not used and the time point planned for the subsequent application is exceeded, the needle valve 41 will only have a short interval at regular intervals during this shutdown. Opened and a small amount of adhesive is released from each nozzle 36 and received by the cup 53 so that new adhesive is always at the outlet. In this way, the nozzle's ability to operate is ensured even during extended periods of inactivity or inactivity, which are usually unscheduled.

  When the nozzle 36 is in the application position, the air supply to the protective cover 46 is stopped and the airflow flowing through the air channel 42 increases to a predetermined speed and is simultaneously pushed out of the channel 38 for adhesive. The air jet 45 from the air channel 42 advantageously affects the adhesive fibrous jet 60. The air jet 45 is directed away from the extended center line 44 of the channel 38 intended for the adhesive and obliquely forward in the circumferential direction, thereby affecting the jet 60 from which the adhesive has been released. Giving it a spiral that increases in width in the direction towards the web 1. Still further, the air jet 45 exerts a tensile force on the adhesive jet 60 to help withdraw the adhesive jet 60 from the channel portion 40. Furthermore, the air jet 45 creates an air curtain around the adhesive helical jet 60 and is carried forward by the air jet 45 and held together in its helical shape.

  In the embodiment described above, the nozzle 36 needs to be movable between its rest position and the application position. This is because the web 1 has an inclined path that rises at the application position, that is, the web 1 forms an acute angle with the horizontal plane. When the web movement path is horizontal at the application position, the device for applying adhesive according to the invention is always a fixed nozzle, i.e. those channels for the adhesive are always up and down in both rest and application states. Having an oriented nozzle. In such an embodiment having a fixed nozzle (not shown), a cup for collecting the adhesive is movably arranged so that it can move laterally to provide the adhesive with an upright free path towards the web. It has become. For this reason, the support rods common to them have a first position where the cup is located directly below the fixed nozzle and a second position where the cup is located beside the nozzle without obstructing the application of adhesive. Can be arranged to move in parallel with each other. In the embodiments described above, an adhesive is used that is intended to be heated so that it can be applied. Of course, other adhesives that are tacky at room temperature without the need for heating or that have an adhesive action at least at the point of application when trying to contact the web to the reel shaft can also be used. One example of the last mentioned type of adhesive is water.

  According to other embodiments (not shown), the protective cover 46 can be omitted in certain cases. Also, passing compressed air inside the channel 42 and additional channels or around the nozzle ensures that the nozzle is kept clean.

  Instead of a nozzle that ejects a continuous thread-like jet of adhesive, it is also possible to use a nozzle that ejects a jet in the form of a spray or a drop. FIG. 11 shows a coating apparatus similar to that described above, but the nozzle member has a nozzle that ejects a jet 61 in the form of a spray, and as described in FIGS. 12 and 13 schematically show the details in the rest position and the application position, respectively. The nozzle 36 of FIG. 11 is provided with a protective cover 46 that operates in a similar manner to that described above. The nozzle 36 has a central channel 62 for supplying a homogeneous mixture of adhesive and air, as well as a rear channel portion 63 and a front channel portion 64. The front channel portion 64 is relatively short and narrow. The central needle valve 65 is configured to open and close the front channel portion 64 and there is no non-negligible risk of at least partially entering the front channel portion 64 and resulting clogging. In FIG. 12, the nozzle 36 is shown in a resting position in which air distributed around the nozzle is supplied for outflow from the outlet 50 of the protective cover 46 as described above. In another embodiment (not shown), the nozzle 36 for applying a spray-form jet adhesive is disposed in a rest position and perpendicular or substantially perpendicular to the web. When the web moves vertically or substantially vertically at the application position, a collection cup or the like should be placed below the nozzle, especially to collect adhesive that can drip from the nozzle after the application of the adhesive has been completed. Is convenient for. When the web moves horizontally or at an acute angle to the horizontal plane at the application location, the jet will flow away from the collection cup as the collection cup will block the jet of adhesive and air released in the form of a spray. The collection cup is arranged to be movable laterally.

  The apparatus for applying the adhesive according to the invention is also advantageously used when a web break occurs in which the adhesive-applied tip is made to adhere to a paper roll already starting to be wound up. can do. Furthermore, the device can be used to attach the end of the finished reel with an adhesive.

  While the invention has been described in connection with a paper web that is moving when reels are changed in the take-up section of a paper machine, the winder or reel packer, i.e., machines and paper that produce all types of paper The present invention can be applied to machines that handle the above.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made within the scope of the following claims without departing from the inventive concept.

  The winding part shown in FIG. 14 is similar to the winding part of FIG. 1, but is provided with a coating device 8 according to the second embodiment of the present invention. As in the first embodiment, the coating device 8 has a mounting device including a support structure 9 formed in a beam shape, a plurality of nozzle members 14, and three brackets 10 that support the dust cover 13. is doing. In other respects, the mounting device of FIG. 14 is structurally designed in a completely different manner. It is formed in the shape of a beam, which is suspended in the movable support rail 71 by a connecting member 73, and a fixed support rail 70 that extends horizontally in the horizontal direction, a support rail 71 that is movable relative to the support rail 71, and horizontally. And a nozzle holder 72 extending in the direction. The fixed support rail 70 is fixedly attached to the bracket 10 and supported by them. It has an inner axially extending space that opens at the end of the fixed support rail 70, and has an elongated opening below the fixed support rail 70, with the movable support rail 71 inside this space. It is received and inside the opening that the upper part of the connecting member 73 faces downwards. The fixed support rail 70 can be compared to a U-shaped beam rotated upside down. Inside the two vertical walls of the fixed support rail 70, there are a plurality of sets of support rollers 74 that are rotatably supported by bearings spaced apart along the fixed support rail 70. The two support rollers in each group are arranged at a predetermined distance in the vertical direction. The axis of the support roller is parallel to the machine direction. The movable support rail 71 has a rectangular shape, for example, a hollow beam shape having a square cross-sectional shape. As a result, the movable support rail 71 has two outer surfaces extending in the vertical direction. However, since the movable support rail 71 extends between the two support rollers 74 of each set, the elongated support elements 75 are respectively provided with each of the support rollers 74. It is fixedly attached to the outer surface. Accordingly, the support roller rolls on the upper and lower surfaces of the support element 75 extending horizontally. At each end of the movable support rail 71, there is a handle 76 whose orientation is adjusted in the axial direction. The cross-sectional shape is the largest of those smaller than the cross-sectional shape of the space, and when the movable support rail 71 is pulled out from the fixed support rail 70 by the other handle 76 in one direction, One can be accepted inside the space.

  The nozzle holder 72 has a rectangular beam shape, for example, a hollow beam having a square cross-sectional shape, and supports the plurality of nozzle members 14 on the side walls facing the direction in which the web moves. The nozzle holder 72 has pipes for supplying air and adhesive to the nozzle 36 and the protective cover 46 as described above for the first embodiment. These pipes have a connecting portion 77 (see FIG. 16) on the outside of one end of the nozzle holder 72 in order to connect a connecting member for external pipes of air and adhesive. The connecting member (not shown) is configured to be separable from the connecting part 77 when the nozzle holder is pulled out of the machine to a maintenance position outside the machine according to FIG. In one embodiment not shown, the connecting member 73 is rigid, i.e. not pivotable, between the movable support rail 71 and the nozzle holder 72, for example welded to the ends of the movable support rail 71 and the nozzle holder 72. A connecting part in the form of two connected rods or plates can be formed. In the illustrated embodiment, the connection member 73 has two sets of bearing ears 78 fixedly attached to the movable support rail 71 and the nozzle holder 72. The bearing central shaft of each pair of bearing ears forms a swing shaft that extends horizontally for the nozzle holder 72 while connecting the two bearing ears to each other. The tilting of the nozzle holder 72 to the application position is controlled and achieved by the force of a power transmission device 79, for example two, preferably pneumatically operated piston cylinders. These piston cylinders are attached to the upper side of the fixed support rail 70, and their piston rods are connected to the link arm 80, respectively. The link arm 80 is rotatably supported at its waist portion on the rear side wall surface of the fixed support rail 70, and its upper end portion is rotatably connected to the piston rod. The lower end portion of each link arm 80 supports a roller 84 (see FIG. 19). This roller is used to tilt the nozzle holder 72 from the rest position in FIG. 16 to the application position in FIG. When 79 is actuated, it is configured to rotationally contact the rear side surface of the nozzle holder 72 facing away from the front side surface where the nozzle is provided. When the nozzle holder 72 is in the rest position, the roller 84 of each link arm 80 has a sufficiently large gap so that the axial displacement of the nozzle holder 72 can occur without engaging the nozzle holder 72. And is arranged so as to pass through the rear side surface of the nozzle holder.

  On the upper side of the fixed support rail, there are two piston cylinders 81, which lock the movable support rail 71 in the operating position of the coating device, and a lock for releasing the movable support rail 71 when maintenance of the nozzle 36 is to be performed. The device 82 is activated. After the lock device 82 is deactivated to release the movable support rail 71, the movable support rail 71 is pulled out of the fixed support rail 70 by one of the desired directions of the handle 76, and the coating device 8 has a problem. The resulting part can be removed from the machine and brought to a maintenance position where the nozzle 36 can be inspected, cleaned, and replaced as needed. Accordingly, the movable support rail 71 and the nozzle holder 72 form a movable unit that can move within a limited range in the lateral direction with respect to the longitudinal direction of the machine.

  A collecting rod 83 is fixedly attached to the bracket 10 and extends below the nozzle 36 to catch adhesive that can drip from the nozzle 36 when it is in the rest position of FIG. When the nozzle 36 accessed from one side of the machine is inspected and the entire unit is pushed back into the machine, the unit is pulled out to the other side of the machine by the other handle 76 and the remaining nozzles 36 are inspected. be able to.

  The above-described embodiment of the applicator device 8 of FIGS. 14-18 allows safe and easy maintenance of the nozzle 36 (often referred to in this context as a glue nozzle). These glue nozzles 36 are arranged in the upper part of the winding part near the support cylinder, which is usually extremely dusty and hot. This environment means that the function of the glue nozzle 36 can deteriorate over time. In terms of time, the use of the protective cover 46 and the supply of air around the adhesive nozzle, as described in more detail with respect to the first embodiment of the applicator device 8, substantially reduces the function of the glue nozzle 36. It leads to improvement. However, after a longer period of time, this difficult environment can lead to encountering, for example, a clogged glue nozzle or other failure that must be replaced. As described above, by allowing the nozzle holder 72 to be withdrawn, it is not necessary for an operator to enter the inside of a normally extremely dusty and hot machine when nozzle maintenance is to be performed. Furthermore, performing maintenance outside the machine is much safer than inside the machine. As a result, the work environment of the maintenance staff is improved in several ways. In addition, this maintenance operation can be performed without any problems during periods when the machine is in operation and no adhesive need be supplied. At the maintenance position where the nozzle holder 72 is in the state shown in FIG. 15, the maintenance staff can perform maintenance in a safe manner and in a standing state. In order to access the remaining nozzles 36, the nozzle holder 72 is then returned to the operating position for withdrawal by the other handle 76 to the opposite side of the machine. When there is sufficient space on one side of the machine, the fixed support rail can extend outside of one side of the machine, if desired. As a result, the nozzle holder 72 and the movable support rail 71 can be pulled out to one side and all nozzles can be accessed for maintenance on one side of the machine.

  The nozzle can be of any type and need not necessarily be provided with means for cleaning with compressed air. That is, the illustrated protective cover 46 with accessories can be dispensed with if necessary. That is, the concept of the nozzle holder that can be pulled out to the maintenance position outside the machine can be applied to any coating device designed with a nozzle member with or without the nozzle protection described above. . However, such protection is preferred.

The perspective view which shows the winding-up part of the paper machine provided with the adhesive agent coating apparatus by this invention. FIG. 2 is a side view showing the position of a support cylinder, an empty reel shaft, the portion of the paper roll where the maximum dimension has been achieved, and the adhesive applicator according to the invention. It is a perspective view of the principal part of the adhesive agent coating apparatus of FIG. 1, and is a figure which shows the rotating shaft with an actuator. FIG. 2 is a perspective view of a nozzle member inside the adhesive applicator of FIG. 1, showing attachment to a rotating shaft and different pipes for supplying adhesive and air. The side view and perspective view which show the cup for collecting the nozzle member of FIG. 4 in a rest position, and an adhesive agent. The side view and perspective view which show the cup for collecting the nozzle member of FIG. 4 in a rest position, and an adhesive agent. The side view and perspective view when the nozzle member of FIG. 5 and FIG. 6 exists in the position rotated upwards. The side view and perspective view when the nozzle member of FIG. 5 and FIG. 6 exists in the position rotated upwards. Sectional drawing which shows typically the air which flows out out of the nozzle of the adhesive agent coating apparatus of FIG. 1 in a rest position, a protective cover, and a protective cover. FIG. 10 is a view showing the nozzle and the protective cover of FIG. 9 at an adhesive application position, and showing airflow and thread-like injection of the adhesive from the nozzle. FIG. 8 is a side view of a nozzle member similar to that of FIG. 7 but provided with a nozzle for injecting a jet in the form of a spray. Sectional drawing which shows typically the nozzle of FIG. 11, and its protective cover in a rest position. The figure which shows the nozzle and protective cover of FIG. 11 in the application | coating state. The perspective view which shows the winding-up part of the paper machine provided with the adhesive agent coating device of 2nd Embodiment of this invention in the state which has a coating device in an operation position. The figure which shows the winding-up part of FIG. 14 in the state which has a coating device in a maintenance position. The perspective view which shows the coating device of FIG. 14 from a different direction. The perspective view which shows the coating device of FIG. 14 from a different direction. The figure which shows the coating device of FIG. The rear perspective view which shows the state which has the coating device of FIG. 14 in a coating position like a photograph. The rear perspective view which shows the state which has the coating device of FIG. 14 in a maintenance position like a photograph.

Claims (27)

A nozzle (36) suitable for application of adhesive on a moving paper web (1), wherein the nozzle (36) is compressed by compressed air from particulates and contaminants that hinder operation. And a member that defines a free space (47) that surrounds the nozzle (36), and a member that supplies air to the space (47). And a member that discharges air from the space (47) on a center line at a distance in front of the front end face of the nozzle (36).
A nozzle characterized in that the air supplying member is configured to supply air when the nozzle (36) is in a resting state between two successive applications of adhesive.   The member that defines the space has a protective cover (46), and the member that supplies the air is spaced from the front end surface (37) of the nozzle (36) and is behind the protective cover (46). In the protective cover (46), which has an inlet (49) arranged at a side position, and the member for discharging the air is arranged on a center line spaced in front of the front end surface (37). 2. Nozzle according to claim 1, characterized in that it has a discharge opening in the form of a circular opening (50).   The nozzle (36) is of the type that jets a jet of adhesive (60) and has a front channel portion (40) through which the jet (60) is extruded, and the front channel portion ( 40) is configured to retain the adhesive therein by capillary action when the nozzle is in a quiescent state, and the front channel portion (40) has the nozzle (36) in the quiescent state. The nozzle according to claim 1, wherein the nozzle faces in a vertical direction at a certain time.   The nozzle (36) is provided with an air channel (42) that is inclined with respect to the front channel portion (40) and around the jet (60) from which the adhesive has been discharged. 4. A nozzle according to claim 3, characterized in that an air jet (45) is sprayed onto the web (1) to influence the movement and movement pattern of the jet. A device (8) for applying an adhesive on a moving paper web (1), said device being configured to protect with compressed air from particulates and contaminants that impede operation A plurality of nozzles (36), and the protection device supplies a member defining a free space (47) surrounding the nozzle (36) and air to the space (47). And a member that discharges air from the space (47) on a center line spaced in front of the front end face of the nozzle (36),
The air supply member of each nozzle (36) is configured to supply air when the nozzle (36) is in a rest state between two successive applications of adhesive. Features device. An apparatus (8) for applying an adhesive on a moving paper web (1) during reel replacement in a winding unit of a paper machine, the winding unit comprising a stand (2) and the above A movable support member (5) for supporting the web (1), and an empty reel shaft (6) from the completed paper roll (7) in the winding section (1). ) In contact with the support member (5) to perform winding of the web (1) around the reel shaft (6) with subsequent separation of the The device (8) for applying the agent is attached to the stand (2) of the winding section upstream of the support member (5) and extends in a direction transverse to the machine direction (9 ) And along a line extending transversely to the direction of this machine And a plurality of nozzles (36) configured to apply an adhesive on the paper web (1), and an attachment device for attaching the nozzles (36) to the support structure. Each of the nozzles (36) is provided with a protection device configured to protect the nozzle (36) with compressed air from particulates and contaminants that hinder operation, the protection device comprising: A member defining a free space (47) surrounding the nozzle (36), a member for supplying air to the space (47), and a center line at a distance in front of the front end surface of the nozzle (36) A device for discharging air from the space (47),
The air supply member of each nozzle (36) is configured to supply air when the nozzle (36) is in a rest state between two successive applications of adhesive. Features device.   The member that defines the space has a protective cover (46), and the member that supplies the air is spaced from the front end surface (37) of the nozzle (36) and is behind the protective cover (46). In the protective cover (46), which has an inlet (49) arranged at a side position, and the member for discharging the air is arranged on a center line spaced in front of the front end surface (37). 7. A device according to claim 5 or 6, characterized in that it has an outlet in the form of a circular opening (50).   8. Apparatus according to claim 5, 6 or 7, characterized in that it comprises an adhesive collecting device (52) configured to collect adhesive from a nozzle (36) in a resting state.   Each nozzle (36) is of the type that jets an adhesive jet (60) and has a front channel portion (40) through which the jet (60) is jetted, said front channel portion (40) is configured to retain the adhesive therein by capillary action when the nozzle is in the rest position, and the front channel portion (40) has the nozzle (36) in the rest position. 9. A device according to claim 5, 6, 7 or 8, characterized in that it is oriented vertically when in   The nozzle (36) is fixedly arranged and the collecting device (52) can move to displace to a lateral position leaving a free vertical path for the adhesive. 10. The apparatus according to claim 8, wherein the apparatus is configured as follows.   The nozzle (36) is configured to be rotatable from a rest position corresponding to the rest state to a coating position, and a front channel portion (40) of the nozzle (36) is perpendicular to the web (1). 10. A device according to claim 8 or 9, characterized in that the collecting device (52) is arranged in a fixed manner at a substantially right angle.   Each nozzle (36) is provided with an air channel (42) that is inclined with respect to the front channel portion (40) and around the jet (60) from which the adhesive has been discharged. Air jets (45) are injected into the web (1) to influence the movement and movement pattern of the jet towards the web (1). apparatus.   9. A device according to claim 5, 6, 7 or 8, characterized in that each nozzle (36) is of the type in which a mixture of adhesive and air is injected in the form of a jet (61) in the form of a spray.   The nozzle (36) has a channel (62) from the rest position corresponding to the rest state in which the channel (62) for the adhesive of the nozzle (36) is oriented substantially vertically. (1) It is configured to be rotatable to a coating position that forms a right angle or a substantially right angle with respect to (1), and the collecting device (52) is fixed below the nozzle (36) in the rest position. 14. A device according to claim 8 or 13, characterized in that the device is arranged.   The nozzle (36) is fixedly disposed, and when the nozzle (36) is horizontally or substantially horizontally oriented and the web moves in the vertical direction or substantially vertical direction, The collecting device (52) is fixedly arranged and a free path for the injection (61) of adhesive towards the web (1) when the nozzle (36) is directed vertically or obliquely 14. Device according to claim 8 or 13, characterized in that the collecting device (52) is arranged to be able to move to displace to a lateral position.   A horizontal rotating shaft (15), an actuator (17) for rotating the rotating shaft (15), and a mounting device for rigid mounting to the rotating shaft (15) and the nozzle member (14); 15. A device according to claim 11 or 14, characterized in that a rotary unit is formed from the rotary shaft (15), the mounting device and the nozzle member (14). A method of applying an adhesive by a nozzle (36) on a moving paper web (1), comprising:
-Protecting the nozzle (36) from particulate contaminants from the surrounding environment while supplying compressed air to improve the working function of the nozzle (36)-each nozzle (36) The step of providing a defined space (47) surrounding the nozzle (36), supplying air into the defined space (47), and in front of the nozzle (36). Exhausting said air through an opening (50) arranged at a distance from
Method according to claim 1, characterized in that the supply and discharge of air occurs when the nozzle (36) is in a rest state between two successive applications of adhesive. A method of applying an adhesive by means of a nozzle (36) on a moving paper web (1) at the time of reel replacement in a winding section of a paper machine,
In the winding part, the web (1) is supported by a support member (5),
A device (8) comprising a plurality of nozzles (36) having channels (38, 62) for applying an adhesive and applying the adhesive in a direction transverse to the direction of the machine; (5) an upstream installation stage;
-Placing an empty reel shaft (6) in contact with said support member (5);
-Applying an adhesive to the entire web (1) or the tip of the web;
Wrapping the web and the tip of the web around the empty reel shaft (6), respectively, and attaching the web and the tip to the reel shaft (6) with an applied adhesive, respectively;
-Protecting the nozzle (36) from particulate contaminants from the surrounding environment while supplying compressed air to improve the operational function of the nozzle (36)-each nozzle (36) The step of providing a defined space (47) surrounding the nozzle (36), supplying air into the defined space (47) and a distance in front of the nozzle (36). Evacuating the air through an opening (50) arranged open,
Method according to claim 1, characterized in that the supply and discharge of air occurs when the nozzle (36) is in a rest state between two successive applications of adhesive.   Each nozzle (36) injects a jet of adhesive (60) and a channel (38) for the adhesive that injects an air jet (45) around the discharged jet (60) of adhesive. And the step of protecting the nozzle (36) includes supplying air to the dormant air channel (42). The method according to claim 17 or 18.   A small amount of adhesive is sprayed from each nozzle (36) at predetermined time intervals when subsequent application of adhesive on the web (1) does not occur for one or other reasons. 20. A method according to claim 17, 18 or 19, wherein the small amount of adhesive is collected. A method for improving the operating function of a nozzle (36) suitable for applying an adhesive on a moving paper web (1), comprising:
-Protecting the nozzle from particulate contaminants from the surrounding environment by means of a protective device while supplying compressed air-comprising protecting each nozzle (36) surrounding said nozzle (36) Providing a defined space (47), and supplying air into the defined space (47) and through an opening (50) disposed at a distance in front of the nozzle (36). Evacuating air, and a method comprising:
Method according to claim 1, characterized in that the supply and discharge of air occurs when the nozzle (36) is in a rest state between two successive applications of adhesive. A method for improving the operating function of a nozzle (36) suitable for applying an adhesive on a moving paper web (1) during a reel change in a take-up section of a paper machine,
In the winding part, the web (1) is supported by a support member (5),
A device (8) comprising a plurality of nozzles (36) having channels (38, 62) for applying an adhesive and applying the adhesive in a direction transverse to the direction of the machine; (5) an upstream installation stage;
-Placing an empty reel shaft (6) in contact with said support member (5);
-Applying an adhesive to the entire web (1) or the tip of the web;
Wrapping the web and the tip of the web around the empty reel shaft (6), respectively, and attaching the web and the tip to the reel shaft (6) with an applied adhesive, respectively;
Protecting the nozzle from particulate contaminants from the surrounding environment with a protective device while supplying compressed air, and the step of protecting each nozzle (36) surrounds the nozzle (36). Providing a defined space (47), and supplying air into the defined space (47) and through an opening (50) disposed at a distance in front of the nozzle (36). Evacuating air, and a method comprising:
Method according to claim 1, characterized in that the supply and discharge of air occurs when the nozzle (36) is in a rest state between two successive applications of adhesive.   Each nozzle (36) injects a jet of adhesive (60) and a channel (38) for the adhesive that injects an air jet (45) around the discharged jet (60) of adhesive. 23. A type having an air channel (42) that is inclined with respect to the nozzle, wherein the step of protecting the nozzle comprises supplying air to the air channel (42) in the resting state. Or the method according to 22.   A small amount of adhesive is sprayed from each nozzle (36) at predetermined time intervals when subsequent application of adhesive on the web (1) does not occur for one or other reasons. 24. The method according to claim 21, 22 or 23, wherein the small amount of adhesive is collected. A device (8) for applying an adhesive on a moving paper web (1), comprising a support structure (9) extending transversely to the machine direction, and a longitudinal direction of the machine A plurality of nozzles (36) arranged along a line extending in the lateral direction and configured to apply an adhesive on the paper web (1), and the nozzle (36) on the support structure. In an apparatus (8) comprising: an attachment device for attachment;
The mounting device includes a fixed support rail (70) extending horizontally in the horizontal direction, a support rail (71) movable relative thereto, and a nozzle holder (72) formed in a beam shape and extending horizontally in the horizontal direction. A connection member (73) for suspending the nozzle holder (72) on the movable support rail (71), and the movable support rail (71) is supported by the movable support rail (71). In order to maintain the nozzle (36) by placing at least a part of the total length of the nozzle holder (72) in a maintenance position outside the paper web (1), in the longitudinal direction of the fixed support rail (70) A device characterized by being movable.   The connection member (73) is configured so that the nozzle holder (72) can be rotated around a horizontal bearing central axis from a lower rest position to an upper application position by a power unit. 26) and the nozzle holder (72), the device (8) for applying an adhesive according to claim 25.   27. Apparatus (8) for applying an adhesive according to claim 25 or 26, characterized in that each nozzle (36) is designed in combination with any one of claims 2 to 4 and claim 1. .

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