JP2013202751A - Slitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that, in a case where an original roll manufactured by a paper machine is carved in a predetermined width by a slitter, a tensile of the original roll degrades because of moisture that is contained in the original roll, resulting in degraded sharpness of the slitter, disabling carving of the original roll.SOLUTION: A slitter includes an anvil roll 20 which is rotary-driven and in which an annular groove 23 is formed on an outer peripheral surface, with one side surface of the annular groove 23 being a side surface blade 23a, and a disc-like rotary blade 21 whose one portion enters the annular groove 23 of the anvil roll 20 in such a manner as an outer peripheral side edge part is pressed against the side surface blade 23a, successively cuts a band-like web inserted between the anvil roll 20 and the rotary blade 21, and is equipped with a heating means for heating the anvil roll 20.

Description

  The present invention relates to a slitter for cutting a continuously fed long web into a desired width dimension, and particularly suitable for cutting a raw fabric tissue produced by a paper machine into individual tissue paper width dimensions. It is a thing.

  For sanitary paper such as toilet paper and kitchen paper, roll a very wide original fabric manufactured by a paper machine into a roll, cut it into a predetermined width with a slitter, and roll it up as a base paper. . These individual base papers are further subjected to necessary post-processing to finish sanitary paper having a predetermined size and shape. Here, depending on the weather at the time of manufacture and the weather at the time of storage, the raw material that passed through the paper machine may have a relatively large amount of water, so that various subsequent processes can be performed smoothly. It is desirable to dry it sufficiently.

JP 2007-245625 A Japanese Patent No. 886625

  When the raw material produced by a paper machine is cut into a predetermined width by a slitter, if the raw material is not sufficiently dried, the tension of the raw material decreases due to moisture contained in the raw material, and the slitter becomes sharp. In the worst case, there is a possibility that the original fabric cannot be separated.

  The objective of this invention is providing the slitter which can suppress the malfunction that a sharpness falls due to the moisture contained in an original fabric, or it becomes impossible to cut into an original fabric.

  In the slitter according to the present invention, an annular groove is formed on the outer peripheral surface, and a rotationally driven anvil roll in which one side surface of the annular groove serves as a side blade, and a part of the annular groove of the anvil roll enters the side surface. In a slitter that continuously cuts a belt-shaped web that is inserted between the anvil roll and the rotary blade, the disk-shaped rotary blade whose outer peripheral side edge is pressed against the blade. A heating means for heating is provided.

  In the present invention, when the belt-like web is inserted between the anvil roll and the rotary blade that are driven to rotate, the side blade on one side of the annular groove of the anvil roll and the rotation that slides around the side blade The blade is continuously cut along the insertion direction. In this case, since the anvil roll is heated by the heating means, drying of the belt-shaped web passed through the anvil roll is further promoted, so that the belt-shaped web is smoothly cut.

  In the slitter according to the present invention, the heating means may be incorporated in the anvil roll. For example, the heating means may be an electric resistance heating element embedded in an anvil roll. Alternatively, the heating means may include heating fluid supply means for forming a heating fluid passage in the anvil roll and supplying the heating fluid to the heating fluid passage.

  The heating means may have an air injection nozzle that blows heated air from the upstream side of the web conveyance direction toward the web cutting region.

  It is also effective to further include a humectant applicator disposed on the downstream side of the web cutting direction from the web cutting region and for applying a humectant to the cut web.

  According to the slitter of the present invention, the base paper can be heated and dried by heating the lower blade, and at the same time, both the upper blade and the lower blade can be heated and dried, so that the base paper is not cut off due to moisture.

  Both the upper blade and the lower blade can be dried by heating, and the uncut paper or the like due to moisture can be more reliably prevented. In addition, the paper dust generated when cutting the base paper can be blown away, which prevents the paper dust from adhering to the upper blade and the lower blade and prevents the paper dust from being attached to the upper blade and the lower blade. Cutting and the like can also be prevented.

  The base paper can be effectively dried by floor heat, and the moisturizing agent can be effectively applied to the base paper, which is effective in impregnating the moisturizing agent.

  According to the slitter of the present invention, since the heating means for heating the anvil roll is provided, it is possible to prevent problems caused by moisture contained in the belt-like web, for example, the side blades of the anvil roll and the sliding blade. Drying of the rotating blade in contact can be promoted. In addition, drying of the belt-shaped web wound around a part of the outer peripheral surface of the heated anvil roll is also promoted by the heating means, so that it can be cut surely and smoothly.

  When the heating means is incorporated in the anvil roll, particularly when the heating means is an electric resistance heating element embedded in the anvil roll, the outer peripheral surface of the anvil roll can be efficiently heated. Similarly, when the heating means has heating fluid supply means for supplying the heating fluid to the passage of the heating fluid formed in the anvil roll, the anvil roll can be efficiently heated.

  When the heating means has an air injection nozzle that blows heated air from the upstream side of the web conveyance direction toward the cutting area of the web, it is possible to further promote the removal of moisture from the side blades and the rotary blade and the drying of the belt-shaped web. it can.

  If the web is further provided with a moisturizer application device for applying a moisturizer to the cut web, the web is in a more dry state than the web cutting area. An agent can be efficiently impregnated.

It is a conceptual diagram of embodiment which applied this invention to the production line of tissue paper. It is the conceptual diagram which expanded and extracted the part of the slitter shown in FIG. It is a front view of the slitter shown in FIG. FIG. 3 is a conceptual diagram in which a part of the slitter shown in FIG. 2 is further extracted and enlarged. FIG. 3 is a conceptual diagram in which a part of the slitter shown in FIG. 2 is further extracted and enlarged.

  An embodiment in which a slitter according to the present invention is incorporated in a production line for a long tissue used for producing a two-layer tissue paper will be described in detail with reference to FIGS. However, the present invention is not limited to such an embodiment, and may be applied to a web that needs to be cut into a predetermined width, such as sanitary paper such as kitchen rolls other than tissue paper. Can do.

  A part of the production line for long tissue in the present embodiment is schematically shown in FIG. An original fabric surface tissue roll 11R and an original fabric reverse surface tissue roll 12R are arranged on the original fabric tissue stand 10, and these original fabric tissue rolls 11R, 12R are several to twenty times the width of the tissue paper as a product. It has a width several times. The strip-shaped original fabrics 11L and 12L drawn out from the original fabric surface tissue roll 11R and the original fabric rear surface tissue roll 12R are sent to a calendar unit 13 disposed adjacent to the original fabric tissue stand 10. On the downstream side of the calendar unit 13, a crimper unit 14, a slitter unit 15, a moisturizing agent application unit 16, and a long tissue winding unit 17 are arranged in this order.

  The calendar unit 13 adjusts the thicknesses of the original fabrics 11L and 12L fed from the original fabrics rolls 11R and 12R so that these thicknesses become a desired thickness.

  The crimper portion 14 embosses the stacked raw fabric tissues 11L and 12L to give tension and flexibility to the raw fabric tissues 11L and 12L and at the same time increase the degree of adhesion between them.

  The slitter unit 15 continuously cuts the raw fabric tissues 11L and 12L into long tissues 18L having a predetermined width corresponding to the width dimension of the tissue paper.

  The moisturizing agent application section 16 is arranged on the downstream side of the cutting direction of the raw fabric tissues 11L, 12L in the conveying direction, and impregnates the long tissue 18L cut into a predetermined width with a moisturizing agent. Gives the desired flexibility.

  The long tissue winding unit 17 rewinds the long tissue 18L sent out from the moisturizing agent application unit 16 again. The wound long tissue rolls 18R are prepared for the number of pairs of tissue to be packed (for example, 200 long tissue rolls 18R in the case of 200 pairs). Then, the long tissue 18L drawn from the long tissue rolls 18R is folded and laminated on each other, cut into a predetermined length, and packed in a box.

  FIG. 2 shows an enlarged and enlarged portion of the slitter unit 15 in the present embodiment, FIG. 3 shows a cross-sectional structure of the front, and FIG. That is, the slitter part 15 in a present Example comprises the principal part by the anvil roll 20, the rotary blade 21, the heating means mentioned later for heating the anvil roll 20, and the flame | frame 22 which supports these.

  The anvil roll 20 whose both ends in the longitudinal direction are rotatably supported by the frame 22 via bearings (not shown) includes a core portion 20a and a cylindrical portion 20b that is integrally fitted to the core portion 20a. However, it is also possible to make them integrally. Power from a drive source (not shown) is transmitted to the anvil roll 20 from one side end portion thereof, and is driven to rotate at a peripheral speed corresponding to the winding speed of the long tissue 18L. On the outer peripheral surface of the cylindrical portion 20b of the anvil roll 20, annular grooves 23 are formed at regular intervals along a direction parallel to the rotation axis, and one side surface of the annular grooves 23 is a side blade 23a. . The arrangement interval of the annular grooves 23 is set to be the same as the width of the long tissue 18L cut from the raw fabric tissues 11L and 12L.

  The rotating blade 21 having a thin disk shape is rotatably attached to the blade holder 24. The blade holders 24 are respectively attached to distal ends of brackets 26 each having a base end fixed to a slide rod 25 extending in parallel with the rotation axis of the anvil roll 20, and the rotation axis of the rotary blade 21 is Set parallel to the axis of rotation. The slide rod 25 in the present embodiment can be manually rotated with respect to the frame 22. Thereby, each rotary blade 21 can be moved to a machining position indicated by a solid line in FIG. 2 and a retracted position indicated by a two-dot chain line in FIG. 2. The machining position is a state where a part of each rotary blade 21 enters the annular groove 23 of the anvil roll 20, and the retreat position is a state where the rotary blade 21 is separated from the anvil roll 20. One end of the slide rod 25 is connected to a fluid pressure cylinder 27 attached to the frame 22. As shown in FIG. 4, the fluid pressure cylinder 27 is capable of reciprocating a small amount of the slide rod 25 along its longitudinal axis. In an effective position set on one reciprocating end side indicated by a solid line in FIG. 4, a part of the rotary blade 21 enters the annular groove 23 of the anvil roll 20 and the outer peripheral edge is pressed against the side blade 23a. It becomes a state. In this case, since the rotary blade 21 is also rotated along with the driving rotation of the anvil roll 20, the raw fabric tissues 11 </ b> L and 12 </ b> L that are belt-shaped webs are inserted between the anvil roll 20 and the rotary blade 21, thereby Can be carved continuously. Moreover, in the non-functional position set as the other reciprocating end shown by the dashed-two dotted line of FIG. 4, the rotary blade 21 is located in the center part of the width direction of the annular groove 23, and will be in a non-contact state with the anvil roll 20. FIG. . In this non-functional position, the raw fabric tissues 11L and 12L cannot be cut. When the rotary rod 21 is switched between the previous machining position and the retracted position by rotating the slide rod 25, this is performed at this non-functional position. That is, the non-functional position and the processing position are the same position.

  The heating means in the present embodiment blows heated air from the upstream side in the transport direction of the original fabric tissues 11L and 12L toward the electric resistance heating element 28 embedded in the anvil roll 20 and the cutting region of the original fabric tissues 11L and 12L. And an air injection nozzle 29.

  The electric resistance heating element 28 is fixed to the core portion 20a so as to be interposed between the core portion 20a and the cylindrical portion 20b of the anvil roll 20, and is connected to a power source (not shown) via a slip ring (not shown). Can be efficiently heated. The air injection nozzles 29 are arranged along the rotation axis of the anvil roll 20 at the same interval as the rotary blades 21 and are connected to a heating air supply source (not shown).

  Accordingly, since the side blades 23a of the anvil roll 20 can be heated by the electric resistance heating element 28, the water adhering thereto can be efficiently evaporated to keep the surface in a dry state. Further, since the rotary blade 21 in contact with the side blade 23a of the anvil roll 20 also receives heat transmission from the side blade 23a in addition to frictional heat, the water adhering to the rotary blade 21 is evaporated to keep the surface dry. Can do. Further, the heated air that is jetted from the air jet nozzle 29 toward the cutting regions of the raw fabrics 11L and 12L promotes further drying of the raw fabrics 11L and 12L. In addition, moisture adhering to the rotary blade 21 and the side blade 23a of the anvil roll 20 can be evaporated more efficiently. Thereby, even if it is a high-humidity atmosphere, smooth separation of the raw fabric tissues 11L and 12L can be reliably performed.

  In the above-described embodiment, the electric resistance heating element 28 is embedded in the anvil roll 20 as the heating means incorporated in the anvil roll 20, but a heating fluid may be used.

  The front shape of the main part of another embodiment of the slitter according to the present invention is shown in FIG. 5 in a cross-sectional state, but the same function elements as those of the previous embodiment are designated by the same reference numerals, and duplicated. The description to be omitted will be omitted. That is, the heating means in the present embodiment includes a heating fluid passage 30 formed in the anvil roll 20 and a heating fluid supply means 31 for supplying the heating fluid to the heating fluid passage 30. The heating fluid passage 30 has a spiral groove 30a formed on the outer peripheral surface of the core portion 20a of the anvil roll 20, and the groove 30a is covered with the cylindrical portion 20b. The passage 30 in the present embodiment also includes a supply passage 30b formed in the core portion 20a of the anvil roll 20 so as to communicate with one end portion of the groove 30a, and an unillustrated discharge passage communicated with the other end portion of the groove 30a. Have. This discharge path is for discharging the heated fluid after heating the anvil roll 20 to the outside of the anvil roll 20, but it may be returned to the heated fluid supply means 31 to circulate the heated fluid. A heating fluid supply means 31 is connected to the supply path 30b so that a heating fluid such as heated liquid or air can be supplied.

  Thereby, the cylindrical part 20b of the anvil roll 20 in contact with the groove 30a can be efficiently heated, and the smooth separation of the raw fabric tissues 11L and 12L is ensured even in a high humidity atmosphere, as in the previous embodiment. Can be performed.

  It should be noted that the present invention should be construed only from the matters described in the claims, and in the above-described embodiment, all the changes and modifications included in the concept of the present invention are other than those described. Is possible. That is, all matters in the above-described embodiment are not intended to limit the present invention, and include any configuration not directly related to the present invention. To get.

DESCRIPTION OF SYMBOLS 10 Original fabric tissue stand 11R, 12R Original fabric tissue roll 11L, 12L Original fabric tissue 13 Calendar part 14 Crimper part 15 Slitter part 16 Moisturizing agent application part 17 Long-sized tissue winding part 18L Long-sized tissue 18R Long-sized tissue roll 20 Anvil Roll 20a Core 20b Tube 21 Rotating blade 22 Frame 23 Annular groove 23a Side blade 24 Blade holder 25 Slide rod 26 Bracket 27 Fluid pressure cylinder 28 Electric resistance heating element 29 Air injection nozzle 30 Passage 30a Groove 30b Supply path 31 Heating fluid supply means

Claims (6)

An annular groove is formed on the outer peripheral surface, one side surface of the annular groove is a side blade, and the anvil roll is rotationally driven, and a part of the annular groove of the anvil roll enters the outer peripheral edge of the side blade. In a slitter that continuously cuts a belt-shaped web inserted between the anvil roll and the rotary blade,
A slitter comprising heating means for heating the anvil roll.   The slitter according to claim 1, wherein the heating means is incorporated in the anvil roll.   The slitter according to claim 2, wherein the heating means is an electric resistance heating element embedded in the anvil roll.   4. A heating fluid passage is formed in the anvil roll, and the heating means has heating fluid supply means for supplying heating fluid to the heating fluid passage. The slitter described.   The slitter according to any one of claims 1 to 4, wherein the heating means has an air injection nozzle that blows heated air toward the cutting region of the web from the upstream side in the conveyance direction of the web.   6. The apparatus according to claim 1, further comprising a moisturizing agent applicator disposed on a downstream side of the web cutting direction with respect to the web cutting region and for applying a moisturizing agent to the cut web. Slitter according to crab.