JP4593192B2 - Stripe coating method and lip coater type coating apparatus - Google Patents

Description

  The present invention relates to a method, an apparatus, and a thin film member used for applying a coating solution to a sheet or web by stripe coating.

  When a sheet (or web) of paper, non-woven fabric, film, gauze, etc. is continuously applied with a coating liquid (eg, adhesive, paint, etc.), the non-coated part and the coated part are alternately applied to the sheet. A so-called stripe coating may be applied.

  FIG. 7 is a perspective view of a lip coater coating apparatus 101 conventionally used in such a case (however, a backup roll is not shown, see Patent Document 1). In this figure, by providing a coating blocking tape 122 in a strip shape so as to correspond to the non-coated portion between the coating liquid supply unit 123 and the coating sheet (not shown), the coating liquid is Even if it is supplied from the supply unit, it is blocked by the coating blocking tape 122, and the coating liquid does not adhere to the non-coated sheet facing that portion. The coating liquid supply unit 123 is arranged on the lower peripheral surface of a backup roll (not shown), the front surface of the doctor edge 113, the upper surface of the nozzle head 114, the rear surface of the liquid reservoir wall 116, and both side portions of the nozzle head 114. This is a liquid storage chamber formed by being surrounded by the partition wall 115 formed.

  In the conventional coating apparatus 101, since the coating prevention tape 122 is worn by continuous contact with the coated sheet, there is a problem that the coating prevention tape 122 must be frequently replaced with a new one. there were. Therefore, as a measure for extending the service life of the coating prevention tape 122, in the above-described conventional technology, both ends are fed by the bolts 124 while being visually checked for the coating state (supported rotatably by the support base 119). And the coating prevention tape 122 attached to the take-up roll 118 (supported rotatably by the support stand 120) is moved in the flow direction of the coated sheet by manually rotating the roll, The new part that was not in contact with the coated sheet was appropriately adjusted so as to contact the coated sheet.

  However, the wear state of the coating prevention tape 122 varies depending on the difference in the coating speed of the apparatus, the surface properties of the coated sheet, and the like, and the coating state is visually confirmed. In order to know the timing of the position adjustment of 122, there is a problem that the skill of the worker is required, and further, a plurality of workers are required to manually rotate the rolls (117, 118). Further, when the position of the coating prevention tape 122 is manually adjusted, the coating amount of the coating liquid changes before and after that, and there is a problem that coating stability is lacking.

  On the other hand, when it is desired to change the coating pattern (that is, the interval between the non-coated portions (or the coated portions)), the coating prevention attached to the feed roll 119 and the take-up roll 118 in FIG. The position of the tape 122 is moved along the axial direction of each roll. At this time, the position of the tape is moved by attaching the start end of the coating prevention tape 122 to the plurality of bolt attachment positions 125 with the bolts 124.

However, shifting each coating-blocking tape one by one with bolts is troublesome, and the bolt mounting position 125 is determined in advance, which limits the degree of freedom of the coating pattern. It was.
JP 7-275773 A

  In view of such a problem of the prior art, the present invention does not require skilled workers or a plurality of workers when stripe coating is applied to a sheet to be coated or a web. It is an object of the present invention to provide a coating method and apparatus which can be stably supplied to a coated sheet or web.

  Furthermore, an object of this invention is to provide the coating method and apparatus which can respond | correspond rapidly and easily to the stripe pattern of various coating / non-coating, and a thin film sheet used for it.

  In one aspect, the present invention provides a nozzle head having a doctor edge below the backup roll, sprays a coating liquid from the nozzle head under pressure, and lowers the lower peripheral surface of the backup roll to the nozzle. Provided is a lip coater type coating apparatus for coating a web or sheet traveling from the front to the back of a head. The coating apparatus includes a coating roll and a take-up roll for coating prevention tape so as to face each other before and after the nozzle head, and at least one of the coating prevention tape drawn from the delivery roll is used as the nozzle. It is stretched along the upper end of the head and wound on the winding roll, and the winding roll is rotated by a motor to move the coating prevention tape continuously in the running direction of the web or sheet at a slow speed. An automatic winding mechanism is provided.

  In a preferred embodiment, the lip coater type coating apparatus further includes the automatic winding for rotating the feeding roll by a motor to move the coating prevention tape continuously at a low speed in the running direction of the web or sheet. It has an automatic feed mechanism that works in conjunction with the mechanism.

  More preferably, the automatic winding mechanism and the automatic feed mechanism are driven by a servo motor.

  According to another aspect of the present invention, in another aspect, a nozzle head having a doctor edge is disposed below the backup roll, a coating liquid is sprayed from the nozzle head under pressure, and the lower peripheral surface of the backup roll is A lip coater type coating apparatus for coating a web or sheet traveling from the front to the rear of a nozzle head. The lip coater-type coating apparatus includes a thin film member feed roll and a take-up roll so as to face each other before and after the nozzle head, and the thin film member drawn from the feed roll is disposed at an upper end of the nozzle head. Automatic winding for stretching along the section and winding it on the winding roll, and rotating the winding roll with a motor to move the thin film-like member continuously in the running direction of the web or sheet at a slow speed A take-off mechanism is provided. The thin film member has at least one opening cut out in a predetermined pattern that defines a coated portion of the web or sheet.

  In a preferred embodiment, the lip coater type coating apparatus further includes the automatic winding mechanism for rotating the feeding roll by a motor to move the thin film-like member continuously at a low speed in the running direction of the web or sheet. It has an automatic feed mechanism that works with

  Preferably, the automatic winding mechanism and the automatic feed mechanism are driven by a servo motor.

  Preferably, the thin film member has two or more openings.

  Preferably, the thin film member is a thin film sheet.

  Preferably, the thin film sheet is a polyester film sheet.

  Preferably, the moving speed of the thin film member varies depending on the length of the web or sheet to be coated.

  Preferably, the moving speed of the thin film member is in the range of about 0.1 to about 0.25 mm / min.

  Preferably, the lip coater type coating apparatus further includes a mechanism for manually forcibly moving the thin film-like member in the web or sheet flow direction during operation of the apparatus.

  Preferably, the lip coater type coating apparatus is used for stripe coating of home delivery tack paper.

  Preferably, the lip coater type coating device is used for stripe coating of small lot products.

  In still another aspect, the present invention provides a thin film member for use in the lip coater type coating apparatus.

  In yet another aspect, the present invention provides a stripe coating method. This method comprises a backup roll, a nozzle head having a doctor edge below the backup roll, a thin film member feed roll and a take-up roll so as to face each other before and after the nozzle head, and the take-up roll. In the lip coater type coating apparatus provided with an automatic winding mechanism that is rotated by a motor, a step of stretching the thin film member along the upper end portion of the nozzle head between the feeding roll and the winding roll; A step of rotating the take-up roll with the motor and moving the thin film-like member at a low speed continuously in the running direction of the web or sheet to be coated running along the backup roll; and the nozzle head And a step of spraying the coating liquid under pressure to coat the non-coated web or sheet. Serial thin film member has at least one opening is cut in a predetermined pattern defining a coating portion of the web or sheet.

  In a preferred embodiment of the stripe coating method, the lip coater type coating device further rotates the feed roll by a motor to continuously move the thin film member in the web or sheet running direction at a low speed. And an automatic feed mechanism interlocking with the automatic winding mechanism, and the method includes rotating the winding roll and the feeding roll in conjunction with the automatic winding mechanism and the automatic feeding mechanism to form the thin film. A step of continuously moving the member in the running direction of the coated web or sheet at a slow speed.

  Preferably, the thin film member is a polyester film sheet.

  According to the lip coater type coating apparatus or the coating method of the present invention, the operator's skill is not required in adjusting the position movement timing and movement amount of the thin film member, and the coating area / non-coating can be stably performed. The work area may be formed on the coated web or sheet.

  Furthermore, according to the lip coater type coating apparatus or coating method of the present invention, the moving speed of the thin film member is arbitrarily adjusted according to the wear state of the thin film member due to the difference in the coating speed and the surface property of the sheet. Can do. Therefore, the service life of the thin film member can be effectively extended, which is advantageous in reducing labor and material costs for replacing the thin film member.

(First embodiment)
The lip coater type coating apparatus according to the first embodiment of the present invention is an automatic winding for rotating a winding roll by a motor to move a coating blocking tape continuously in a running direction of a web or sheet at a low speed. It has a mechanism. Hereinafter, it demonstrates in detail, referring drawings.

  FIG. 1 is a side view of a lip coater type coating apparatus 11 according to a first embodiment of the present invention (however, support bases 19 and 20 for supporting the rotating shafts of rolls 17 and 18 are not shown). ). FIG. 2 is a perspective view of the lip coater type coating apparatus 11 according to the first embodiment of the present invention (however, the backup roll 12 is not shown).

  As shown in FIGS. 1 and 2, the lip coater type coating apparatus 11 according to the first embodiment of the present invention includes a backup roll 12, a doctor edge 13, a nozzle head 14, a partition wall 15, a liquid storage wall 16, and a delivery. A roll 17, a take-up roll 18, support stands 19 and 20, a liquid reservoir chamber 23, a coating prevention tape 22, and an automatic take-up mechanism are provided. The automatic winding mechanism typically includes a servo motor 27, a gear head 28, a controller (not shown), pulleys 24 and 25, and a timing belt 26.

  When stripe coating is applied to the sheet S (or web W) using the coating apparatus 11, a coating blocking tape 22 is previously stretched on the nozzle head 14 as shown in FIG. 2, and both ends thereof are supported. It fixes to the roll surface of the sending roll 17 and the winding roll 18 supported by the stands 19 and 20 using a commercially available adhesive tape like a vinyl tape, respectively. Only one coating blocking tape 22 may be used, or two or more coating blocking tapes 22 may be used. The width of the coating prevention tape 22 to be used and the position and interval of the coating prevention tape 22 are appropriately set according to the target stripe pattern.

  The delivery roll 17 and the take-up roll 18 are rotatable around the rotation axis of the roll. The take-up roll 18 is provided with an automatic take-up mechanism, and the servo motor 27 is attached via the gear head 28 by rotating the servo motor 27 at a constant speed using a controller (not shown). The pulley 24 coaxial with the rotation shaft 27 rotates, and the pulley 25 coaxial with the rotation shaft of the winding roll 18 rotates via the timing belt 26, whereby the winding roll 18 rotates. The feed roll 17 rotates as the coating prevention tape 22 is pulled by the take-up roll 18. In this way, the position of the coating prevention tape 22 can be moved from the front to the back of the backup roll 12 at a controlled speed by the automatic winding mechanism. The front of the backup roll 12 refers to the side where the sheet S is wound around the lower peripheral surface of the backup roll 12 with respect to the backup roll 12, and the rear of the backup roll 12 refers to the backup roll 12. The side where the coated sheet S fed out from the lower peripheral surface of the backup roll 12 is present is meant.

  Since the rotation speed of the servo motor 27 of the automatic winding mechanism can be controlled to a constant speed by a controller (not shown), the moving speed of the coating prevention tape 22 can be kept constant. The rotation speed of the winding roll 18 controlled by the automatic winding mechanism (or the moving speed of the coating blocking tape 22) is the length of the coated sheet S, the coating speed, the type of coated sheet, and the coating. It can be appropriately determined by those skilled in the art depending on the amount and the like. Typically, the moving speed of the coating prevention tape 22 is, for example, about 0.1 mm / min to about 0.25 mm / min when a polyester film having a thickness of about 38 μm is used as the coating prevention tape 22. A speed in the range is preferred.

  The coating liquid is previously filled in a liquid reservoir chamber 23 defined by the lower peripheral surface of the backup roll 12, the doctor edge 13, the nozzle head 14, the partition wall 15, and the liquid reservoir wall 16. At the time of coating the sheet S (or web W), the coating liquid is applied from the liquid reservoir chamber 23 to the lower surface of the sheet S while the sheet S travels from the front to the back of the backup roll 12 by rotating the backup roll 12. Inject. At that time, a metering pump (not shown) is used to control the number of revolutions of the metering pump in accordance with the coating speed so that the coating amount becomes a preset amount. . At this time, the portion of the sheet S facing the coating blocking tape 22 is not coated because the coating liquid sprayed from the liquid storage chamber 23 is blocked by the coating blocking tape 22. As a result, the sheet S is stripe-coated. The traveling speed of the sheet S is determined depending on the drying ability of the coating liquid, and is typically 170 m / min, and preferably in the range of 160 m / min to 180 m / min.

  As described above, according to the lip coater type coating apparatus 11 according to the first embodiment of the present invention, the coating prevention tape 22 is continuously moved in the direction of the flow of the sheet S at a constant speed by the automatic winding mechanism. Therefore, a new portion of the tape 22 is always supplied for contact with the sheet S, so that damage due to wear of the tape 22 can be suppressed, and the skill of the operator to know the timing of movement of the tape 22 can be suppressed. In addition, there is an advantage that a plurality of workers for manually rotating the roll 17 and the roll 18 are not required.

  Furthermore, since the moving speed of the coating blocking tape 22 can be adjusted as appropriate according to the wear state of the coating blocking tape 22 due to differences in coating speed, surface characteristics of the sheet S, etc., the coating blocking tape 22 can be efficiently used. Can be used. Thereby, the service life of the coating prevention tape 22 can be significantly extended as compared with the conventional case.

  By the way, for example, when the contact portion of the coating prevention tape 22 with the sheet S is partially defective or dirty, the contact portion of the coating prevention tape 22 with the sheet S is suddenly changed. The case where it wants to do can also be assumed. In preparation for such a case, the lip coater type coating apparatus 11 according to the present embodiment forcibly applies the coating blocking tape 22 of the sheet S regardless of the automatic winding mechanism even during operation of the apparatus. A mechanism for manually forcibly moving in the flow direction may be provided. By doing so, it is possible to deal with emergencies. Such a mechanism can be realized by providing a handle or the like coaxial with the roll 18 (or the rolls 17 and 18). At that time, it is safe to manually rotate only in the flow direction of the sheet S (cannot be rotated in the direction opposite to the flow).

  Typically, the lip coater type coating apparatus 11 according to the present embodiment can be used for stripe coating such as home delivery tack paper, paper-based tack paper, film-based tack paper, but is not limited to these applications (hereinafter referred to as the following). The same applies to the above embodiment).

  Various coating liquids can be used as the coating liquid that can be used in the lip coater type coating apparatus 11 according to the present embodiment depending on the purpose. For example, an adhesive is used for applications such as tack paper. (The same applies to the following embodiments.)

  As the servo motor 27, the gear head 28, and the controller, those commercially available from those skilled in the art (for example, Sumitomo Heavy Industries, Ltd.) can be used. In the present embodiment, the motor and the gear head are used separately, but the motor and the gear head can be used in the same manner. A commercially available power transmission mechanism including the belt 26 and the pulleys 24 and 25 can also be used. (The same applies to the following embodiments.)

(Second Embodiment)
In the second embodiment of the present invention, a lip coater type coating apparatus 21 provided with an automatic feeding mechanism for the feeding roll 17 in the lip coater type coating apparatus of the first embodiment is also provided. Hereinafter, it demonstrates in detail, referring drawings.

  FIG. 3 is a perspective view of a lip coater type coating apparatus 21 according to the second embodiment of the present invention (however, the backup roll 12 is not shown).

  As shown in FIG. 3, the lip coater type coating apparatus 21 according to the second embodiment of the present invention further includes an automatic feeding mechanism that rotates the feeding roll 17 by the driving force of the servo motor 33. This is different from the first embodiment. This automatic delivery mechanism typically includes a servo motor 33, a gear head 34, a controller (not shown), pulleys 29 and 30, and a timing belt 32. Since other parts of the second embodiment are basically the same as those of the first embodiment, detailed description thereof is omitted here.

  By rotating the servo motor 33 at a constant speed using a controller (not shown), the pulley 30 attached coaxially with the rotation shaft of the servo motor 33 is rotated via the gear head 34, and the timing belt 32 is rotated. Then, a pulley 29 coaxial with the rotation axis of the feed roll 17 rotates, whereby the feed roll 17 rotates, and the coating prevention tape 22 is fed to the take-up roll 18 side.

  In the first embodiment, the rotatable feed roll 17 is rotated by being pulled by the coating prevention tape 22, but in the second embodiment, the feed roll 17 is rotated by the power of the servo motor 33. Therefore, it is possible to reduce the risk that the coating prevention tape 22 is damaged due to the tension applied between the take-up roll 18 and the feed roll 17.

  The automatic take-up mechanism and automatic feed mechanism can each independently adjust the rolls 18 and 17 to any rotational speed by a controller, but preferably the two mechanisms are shared by a common controller (eg, FIG. 6). Are used in conjunction with each other. Thereby, the moving speed of the tape 22 can be kept constant, and at the same time, it is possible to prevent the coating blocking tape 22 from being damaged due to the operation of the feed roll 17 not being linked with the take-up roll 18.

  According to the lip coater type coating apparatus 21 according to the second embodiment of the present invention, as in the first embodiment, the skill of the operator is required to measure the timing for moving the position of the coating prevention tape 22. In addition, there is an advantage that an operator is not required when moving.

  Furthermore, since the moving speed of the coating blocking tape 22 can be arbitrarily adjusted according to the wear state of the coating blocking tape 22 due to differences in coating speed, surface properties of the sheet S, etc., the coating blocking tape efficiently. 22 may be used. As a result, the service life of the coating prevention tape 22 is extended.

  The motor that can be used in the automatic winding mechanism or automatic feeding mechanism of the lip coater type coating apparatus 11 or 21 of the present invention is a servo motor that can be rotated while controlling the rotation speed of the roll as described above, and It is not limited to the controller which controls. Other similarly usable mechanisms include inverter motors, transmissions, and the like. (The same applies to the following embodiments.)

  The lip coater type coating apparatus 21 of the present embodiment is a mechanism for forcibly moving the coating blocking tape 22 manually in the flow direction of the coated sheet or web regardless of the automatic mechanism even during operation of the apparatus. May be provided. Thereby, the advantage that it can respond in an emergency is acquired. Such a mechanism can be realized by providing a handle or the like coaxial with the rolls 17 and 18.

(Third embodiment)
In the third embodiment of the present invention, in the lip coater type coating apparatus according to the first embodiment, a thin film-like member having openings cut out in a predetermined pattern is used instead of the strip-shaped coating prevention tape. The used lip coater type coating apparatus 31 is provided. Hereinafter, it will be described in detail with reference to the drawings.

  FIG. 4 is a perspective view of a lip coater type coating apparatus 31 according to the third embodiment of the present invention (however, the backup roll 12 is not shown). FIG. 5 is a plan view showing an example of the thin film member 42 used in the lip coater type coating apparatus 31 according to the third embodiment of the present invention.

  As shown in FIG. 4, the lip coater type coating apparatus 31 according to the third embodiment of the present invention is different from the first embodiment in that a thin film member 42 is used instead of the coating prevention tape 22. Is different.

  The thin film member 42 used in the present embodiment is a thin film sheet made of a material such as polyester having openings cut out in a predetermined pattern. FIG. 5 shows an example of a variation of the thin film member 42 having such an opening (shaded portion in the drawing). A thin film sheet having openings of a predetermined pattern depending on the target product can be produced by designing a pattern using CAD (Computer Aided Design) or the like and cutting the thin film sheet accordingly. Therefore, it is possible to easily cope with various pattern variations according to the application. In particular, in the case of home delivery tack paper and the like, there are requests for manufacturing home delivery tack paper having a different pattern for each home delivery company. Therefore, it is advantageous for a manufacturer to respond quickly to such a request. In addition, in the case of small lot products, it is frequently replaced with a thin film sheet with a different stripe pattern for each lot, but even in such a case, the pattern of the thin film member can be easily processed as described above, The present invention, which allows easy attachment of a thin film sheet to a roll, is advantageous. In addition, in this specification, a small lot product shall normally refer to the thing whose length of a to-be-coated sheet is about 100,000 m or less.

  The thin film member 42 used in the present invention is preferably a material having low frictional resistance and dimensional stability, and may be a metal, a polyester film, or the like. In the case where a plurality of non-coating regions are provided in the width direction of the sheet or web to be coated, the thin film member 42 is preferably a synthetic resin such as a polyester film in consideration of easiness of cutting. . Other synthetic resins that can be used in the present invention include polyimide, aramid, and the like.

  The thickness of the thin film member 42 used in the present invention is preferably about 38 μm, but is not limited to this, and the optimum thickness of the thin film member 42 is appropriately set by those skilled in the art according to the purpose. obtain. A suitable thickness of the thin film member 42 is, for example, in the range of 25 μm to 75 μm in the case of a polyester film. Further, the size of the thin film member 42 is determined depending on the size of the coating apparatus and / or the sheet to be coated.

  Since the lip coater type coating apparatus according to the third embodiment includes an automatic winding mechanism, it does not require an operator for adjusting the position of the thin film-like member 42 and also requires skill of the operator. Has the advantage of not. Further, the moving speed of the thin film member 42 can be arbitrarily adjusted according to the wear state of the thin film member 42 due to differences in coating speed, sheet surface properties, and the like. Therefore, the thin film member can be used efficiently, leading to an extension of the service life of the thin film member.

  In order to cope with an emergency, a mechanism for forcibly moving the thin film sheet manually in the flow direction of the coated sheet or web may be provided regardless of the automatic mechanism even during operation of the apparatus (first For example).

(Fourth embodiment)
In the fourth embodiment of the present invention, there is provided a lip coater type coating apparatus 41 provided with an automatic feeding mechanism for rotating the feeding roll 17 in the third embodiment.

  FIG. 6 is a perspective view of a lip coater type coating apparatus 41 according to the fourth embodiment of the present invention (however, the backup roll 12 is not shown).

  As shown in FIG. 6, the lip coater type coating apparatus 41 according to the fourth embodiment of the present invention further includes an automatic feed mechanism that rotates the feed roll 17 by the driving force of the servo motor 33. This is different from the third embodiment. Furthermore, the fourth embodiment shown in FIG. 6 includes a controller 35 for adjusting the speed by linking the servo motor 27 of the automatic winding mechanism and the servo motor 33 of the automatic feed mechanism.

  Since the automatic delivery mechanism has been described in the second embodiment, a detailed description thereof is omitted here.

  Since the thin film member 42 has been described in the third embodiment, a detailed description thereof is omitted here.

  In the third embodiment, the rotatable feed roll 17 is rotated by being pulled by the thin film member 42. However, in the fourth embodiment, the feed roll 17 is rotated by the power of the servo motor 33. The tension applied to the thin film member 42 is suppressed, and the risk of the thin film member 42 being damaged can be reduced.

  As shown in FIG. 6, a lip coater type coating apparatus 41 according to the fourth embodiment of the present invention includes a controller 35 that controls an automatic winding mechanism and an automatic feed mechanism. The controller 35 includes a switch 36, a speed adjustment knob 37, and a speed display unit 38, and is electrically connected to the respective servo motors 27 and 33 of the automatic winding mechanism and the automatic feeding mechanism. The controller 35 can independently adjust the rotation speeds of the take-up roll 18 and the delivery roll 17, and at the same time, the rolls 18 and 17 are driven in conjunction with each other. The controller may be provided separately for each of the automatic winding mechanism and the automatic feeding mechanism, but should be operated so that the rolls 18 and 17 are interlocked in use.

  In this way, the moving speed of the thin film member 42 can be kept stable, and at the same time, the thin film member 42 can be prevented from being damaged due to the operation of the feed roll 17 not working with the take-up roll 18. Can do.

  As described above, according to the lip coater type coating apparatus 41 according to the fourth embodiment of the present invention, the thin film member 42 is continuously fed out at a speed controlled by the automatic winding mechanism and the automatic feeding mechanism. Therefore, there is an advantage that the skill of the operator is not required for measuring the timing of the movement of the thin film-like member 42, and the operator for the movement is not required.

  Furthermore, since the moving speed of the thin film member 42 can be arbitrarily adjusted according to the wear state of the thin film member 42 due to the difference in the coating speed and the surface property of the sheet S, the thin film member 42 is used efficiently. Can do. As a result, the service life of the thin film member 42 is extended.

  The lip coater type coating apparatus 41 of the present embodiment includes a mechanism for forcibly moving the thin film member 42 manually in the flow direction of the coated sheet or web regardless of whether the apparatus is in operation or automatic. (Refer to the second embodiment). Thereby, the advantage that it can respond in an emergency is acquired.

  In addition, by using a thin film sheet such as a polyester film as the thin film-like member 42, a pattern can be designed using CAD and cutting can be performed accordingly, so that various pattern variations according to the application can be easily handled. . In particular, in the case of home delivery tack paper and the like, there are requests for manufacturing home delivery tack paper having a different pattern for each home delivery company. Therefore, it is advantageous for the manufacturer to be able to respond quickly to such a request. In addition, in the case of small lot products, it is usually necessary to frequently change to a thin film sheet having a different stripe pattern for each lot. In such a case, the pattern of the thin film member is easily processed as described above. In addition, the present invention, which allows easy attachment of a thin film sheet to a roll, is advantageous.

  In the lip coater type coating apparatus 41 according to the fourth embodiment of the present invention, stripe coating for home delivery tack paper is performed using a thin film-like member cut out from the opening designed in the same manner as shown in FIG. It was.

  As the coated sheet, a release paper for a small lot delivery tack paper having a width of 1,550 mm and a length of 3,000 m was used. The traveling speed of the coated sheet was set to 170 m / min. As the coating solution, an emulsion adhesive available as a commercial product was used.

  A single-sided matte polyester film sheet (width 1,800 mm × length 510 mm; thickness 38 μm) was used as the thin film member. A pattern of openings was prepared by CAD and prepared by cutting the film accordingly.

  In order to rotate the winding roll, an induction motor (product number: A9U90AH) and a gear head (product number: G9BXH10H) (both manufactured by Sumitomo Heavy Industries, Ltd.) were used in combination with a pulley / timing belt mechanism. A similar mechanism was used for the delivery roll. By connecting a controller to both induction motors and controlling their operations simultaneously, the operations of the take-up roll and the delivery roll were interlocked and at the same time their rotational speed was controlled. The automatic winding / feeding mechanism was set so that the moving speed of the polyester film sheet was 0.25 mm / min.

  As a result, it was possible to continuously apply a total of 130,000 m of the coated sheet while maintaining a stable coated / non-coated surface on the coated sheet. This is only possible for continuous coating of about 3,000 m of the coated sheet when using a coating blocking tape (polyester film, 38 μm thickness) with a conventional lip coater type coating apparatus as shown in FIG. It shows that the service life of the polyester film sheet is remarkably improved as compared with the case where it was not.

  The coating apparatus of the present invention is useful for coating a sheet such as paper, non-woven fabric, film, gauze, or stripe coating on a web, and particularly useful for stripe coating such as a small-lot home delivery tack paper. .

Side view of the lip coater type coating apparatus according to the first embodiment of the present invention. 1 is a perspective view of a lip coater type coating apparatus according to a first embodiment of the present invention. The perspective view of the lip coater type coating device which concerns on the 2nd Embodiment of this invention. Top view A perspective view of a lip coater type coating apparatus according to a third embodiment of the present invention. The top view which shows an example of the thin film member used in the lip coater type coating device which concerns on the 3rd and 4th embodiment of this invention The perspective view of the lip coater type coating device which concerns on the 4th Embodiment of this invention. Perspective view of a conventional lip coater type coating apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Lip coater type coating apparatus 12 according to the first embodiment of the present invention Backup roll 13 Doctor edge 14 Nozzle head 15 Partition wall 16 Reservoir wall 17 Feed roll 18 Take-up rolls 19 and 20 Support base 21 Second embodiment of the present invention Lip coater type coating apparatus 22 according to the embodiment Coating coating tape 23 Liquid reservoir chambers 24, 25, 29, 30 Pulleys 26, 32 Timing belts 27, 33 Servo motors 28, 34 Gear head 31 In the third embodiment of the present invention Lip coater type coating apparatus 35 Controller 36 Switch 37 Speed adjustment knob 38 Speed display unit 41 Lip coater type coating apparatus 42 according to the fourth embodiment of the present invention Thin film member

Claims (4)

A web that travels from the front to the back of the nozzle head on the lower peripheral surface of the backup roll by disposing a nozzle head having a doctor edge below the backup roll, spraying a coating liquid from the nozzle head under pressure. Or in the lip coater type coating device that coats the sheet,
A coating prevention tape feed roll and a take-up roll are provided so as to face each other before and after the nozzle head, and at least one coating prevention tape drawn from the delivery roll is disposed along the upper end portion of the nozzle head. So that it is wound on the winding roll,
The winding-up roll and the feed-out roll are rotated at a slow speed continuously in the running direction of the web or sheet by rotating the winding roll and the feeding roll in an interlocking manner while independently adjusting the respective driving rotational speeds by individual motors. in Before moving, an automatic winding / feeding mechanism, lip coater type coating apparatus. A web that travels from the front to the back of the nozzle head on the lower peripheral surface of the backup roll by disposing a nozzle head having a doctor edge below the backup roll, spraying a coating liquid from the nozzle head under pressure. Or in the lip coater type coating device that coats the sheet,
A thin film member feed roll and a take-up roll are provided so as to face each other before and after the nozzle head, and the thin film member drawn from the feed roll is stretched along the upper end of the nozzle head. The winding roll is wound up,
In very low speed continuously the thin film member by the Rukoto in conjunction rotated while adjusting independently the respective driving speed by the winding roll and feeding each individual motor roll in the running direction of the web or sheet Ru was moved, automatic winding / feeding a mechanism,
The thin film-like member is a lip coater type coating apparatus having at least one opening cut out in a predetermined pattern that defines a coating portion of the web or sheet. The lip coater type coating apparatus according to claim 2, further comprising a mechanism for manually moving the thin film member in a web or sheet flow direction during operation of the apparatus. A backup role,
A nozzle head having a doctor edge below the backup roll;
A feed roll and a take-up roll for the thin film member so as to face each other before and after the nozzle head;
An automatic winding mechanism for rotating the winding roll by a first motor ;
In a lip coater type coating apparatus provided with an automatic delivery mechanism for rotating the delivery roll with a second motor ,
Stretching the thin film member along the upper end of the nozzle head between the feed roll and the take-up roll; and
The take-up roll and the feed roll are rotated in conjunction with the automatic take-up mechanism and the automatic feed mechanism while independently adjusting the respective drive rotation speeds, and the thin film member is moved along the backup roll. Continuously moving in the traveling direction of the coated web or sheet traveling at a slow speed,
Spraying a coating liquid from the nozzle head under pressure, and coating the non-coated web or sheet.
The said thin film-like member is a stripe coating method which has at least 1 opening part cut off by the predetermined pattern which prescribes | regulates the coating part of the said web or a sheet | seat.

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