Cylinder screen paper machine

Abstract

The present invention provides a cylinder wire mesh paper machine that allows for a simple and compact structure of the manifold block, while also reducing the cost of replacing the manifold block. [Solution] In a cylinder screen paper machine that supplies pulp liquid from a slicing channel to a wet forming region on the circumferential surface of a cylinder mold rotating in a vat, a pulp liquid supply housing 20 is provided between the slicing channel and the upstream pulp liquid supply channel upstream of the slicing channel, housing a manifold block 19 from the width direction of the cylinder mold, which has 48 pulp liquid supply channels a01 to a48 that supply pulp liquid individually in the width direction of the slicing channel. Dilution water supply channels 40A to 40J extending from the base end to the tip of the manifold block 19 are opened only to a selected single or multiple pulp liquid supply channels from each of the pulp liquid supply channels a01 to a48, and the dilution water from each dilution water supply channel 40A to 40J is supplied individually via a dilution water channel 46.

Description

Technical Field

[0001] The present invention relates to a cylinder paper machine that enables individual dilution of stock liquid supplied from substantially the entire width direction of a cylinder mold to a wet forming region on the peripheral surface of the rotating cylinder mold in a vat.

Background Art

[0002] As this type of cylinder paper machine, there is known one including: a stock liquid supply unit that supplies stock liquid to a wet paper forming region on the peripheral surface of a cylinder mold; a stock liquid upstream supply unit provided on the upstream side of the stock liquid supply unit and configured to supply stock liquid to the stock liquid supply unit; and a plurality of stock liquid supply passages provided between the stock liquid supply unit and the stock liquid upstream supply unit, and configured to distribute the stock liquid supplied from the stock liquid upstream supply unit to the stock liquid supply unit in the width direction of the cylinder mold and supply the distributed stock liquid to the stock liquid supply unit respectively (see Patent Document 1).

[0003] In such a cylinder paper machine, the stock liquid is uniformly supplied to the stock liquid supply unit through the respective stock liquid supply passages arranged at substantially equal intervals over substantially the entire width direction of the cylinder mold.

[0004] By the way, depending on the stock liquid supplied to the wet forming region on the peripheral surface of the cylinder mold, a difference may occur in the thickness in the width direction of the paper formed in the width direction of the cylinder mold. In that case, the stock liquid at the portion where the paper is thick in the width direction of the cylinder mold is diluted with dilution water or the like, whereby the thickness of the paper in the width direction is made uniform (see Patent Document 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of Invention

[0006] However, since the pulp liquid supplied to the pulp liquid supply unit is distributed through multiple pulp liquid supply passages that extend across almost the entire width of the cylinder mold, supplying diluting water individually to each pulp liquid supply passage requires the same number of diluting water supply passages as the pulp liquid supply passages. In this case, if each pulp liquid supply passage is individually connected to a tubular diluting water supply passage from the width of the cylinder mold, the supply structure of pulp liquid and diluting water near the side of the pulp liquid supply unit becomes extremely complicated and large due to the individual pulp liquid supply passages and diluting water supply passages.

[0007] Furthermore, if specifications change over time, or if adjustments or changes are required to the supply volume of pulp solution and diluent to the pulp solution supply unit, all pulp solution supply lines and diluent supply lines must be replaced, resulting in enormous costs for replacing the pulp solution and diluent supply structure.

[0008] The present invention has been made in view of the above, and its objective is to provide a cylinder screen paper machine that can reduce replacement costs while making the supply structure of paper stock liquid and dilution water to the paper stock liquid supply unit very simple and compact. [Means for solving the problem]

[0009] To achieve the above objective, the present invention is based on a cylinder screen paper machine that supplies a pulp liquid to the wet forming region on the circumferential surface of a cylinder mold rotating in a vat. The invention includes a pulp liquid supply unit provided on the vat facing the wet paper forming region on the circumferential surface of the cylinder mold and supplying the pulp liquid to the wet paper forming region of the cylinder mold over substantially the entire width of the cylinder mold; an upstream pulp liquid supply unit provided upstream of the pulp liquid supply unit and supplying the pulp liquid to the pulp liquid supply unit; and a plurality of units provided between the pulp liquid supply unit and the upstream pulp liquid supply unit, each individually supplying the pulp liquid from the upstream pulp liquid supply unit to the pulp liquid supply unit from the width of the cylinder mold. The invention is characterized by comprising: a manifold block with a built-in paper pulp liquid supply passage; a paper pulp liquid supply housing formed to be elongated in the width direction of the cylinder mold, in which the manifold block is accommodated by insertion from the tip into an opening that opens on one side in the width direction of the cylinder mold; dilution water supply passages extending from the base end to the tip of the manifold block; and a plurality of dilution water flow channels that open only to a selected single or a plurality of paper pulp liquid supply passages and supply dilution water from each of the dilution water supply passages individually.

[0010] Alternatively, multiple bats may be arranged side by side, and multiple bats selected from among them may be used.

[0011] Furthermore, it is preferable that the manifold block has a paper pulp liquid distribution function as a distributor that distributes the paper pulp liquid from the upstream paper pulp liquid supply section to each of the paper pulp liquid supply passages, as well as a dilution water supply function that supplies dilution water from the dilution water supply passage only to a selected paper pulp liquid supply passage among the paper pulp liquid supply passages via the dilution water flow path.

[0012] Alternatively, an existing manifold block having only a manifold distribution function as a distributor that distributes manifold liquid from the upstream manifold liquid supply unit to each of the manifold liquid supply passages may be inserted into the opening of the manifold liquid supply housing, while a manifold block having a manifold distribution function in addition to a dilution water supply function that supplies dilution water from the dilution water supply passage to a selected manifold liquid supply passage from among the manifold liquid supply passages via the dilution water flow path may be inserted in place of the existing manifold block.

[0013] Furthermore, each of the dilution water channels may be grouped into single or multiple groups in the width direction of the cylinder mold according to the number of each dilution water supply channel.

[0014] Furthermore, each of the dilution water channels may be grouped into single or continuous groups in the width direction of the cylinder mold for each dilution water supply channel, such that the number of groups near both ends in the width direction of the cylinder mold is less than the number of groups near the center in the width direction of the cylinder mold.

[0015] Alternatively, each of the dilution water supply passages may be recessed in a groove-like shape on the circumferential surface of the manifold block, and the openings of each passage may be sealed from the outside with water-stopping plates to allow the dilution water to flow in the width direction of the cylinder mold. [Effects of the Invention]

[0016] In short, the manifold block between the paper pulp liquid supply unit, which supplies paper pulp liquid over substantially the entire width of the wet paper forming region on the circumferential surface of the cylinder mold rotating in the vat, and the upstream paper pulp liquid supply unit, which supplies paper pulp liquid to the paper pulp liquid supply unit, is provided with multiple paper pulp liquid supply passages that individually supply paper pulp liquid from the upstream paper pulp liquid supply unit to the paper pulp liquid supply unit from the width direction of the cylinder mold, and multiple dilution water supply passages that extend from the base end to the tip end of the manifold block, and dilution water from each dilution water supply passage is individually supplied only to a selected single or multiple paper pulp liquid supply passage from among the paper pulp liquid supply passages.

[0017] Therefore, it is not necessary to provide separate tubular dilution water supply channels that are individually connected to each pulp liquid supply channel from the width direction of the cylinder mold. As a result, the supply structure of pulp liquid and dilution water to the pulp liquid supply section becomes very simple and compact.

[0018] Furthermore, since the manifold block is housed by insertion from its tip into an opening in the pulp liquid supply housing that opens on one side in the width direction of the cylinder mold, even if changes in specifications over time or adjustments or changes in the amount of pulp liquid and dilution water supplied to the pulp liquid supply unit are required, it is only necessary to form the optimal pulp liquid supply passages and dilution water supply passages in the manifold block to meet those requirements. For this reason, even if changes in specifications over time or adjustments or changes in the amount of pulp liquid and dilution water supplied to the pulp liquid supply unit are required, it is not necessary to replace all of the pulp liquid supply passages and dilution water supply passages, as is the case with tubular pulp liquid and dilution water supply structures. As a result, only the manifold block with the optimal pulp liquid supply passages and dilution water supply passages formed therein needs to be replaced, thereby reducing replacement costs.

[0019] Furthermore, when replacing the manifold block, the manifold block can be easily replaced by inserting and removing it from one side in the width direction of the cylinder mold into the opening of the paper pulp liquid supply housing.

[0020] Furthermore, by using a selection of multiple vats arranged in parallel, diluting water is supplied to each pulp liquid supply channel in the width direction of the cylinder mold for each of the multiple vats, and the number of diluting water channels grouped in the width direction of the cylinder mold according to each vat is further subdivided and reduced. As a result, it becomes possible to supply diluting water from each diluting water channel to each desired pulp liquid supply channel with near-pinpoint precision. This makes it possible to optimally dilute the pulp liquid in the width direction of the cylinder mold by supplying diluting water to each desired pulp liquid supply channel with near-pinpoint precision, thereby improving the paper thickness accuracy in the width direction of papermaking.

[0021] Furthermore, since the manifold block has a dilution water supply function in addition to the paper stock liquid distribution function, dilution water can be supplied individually simply by selectively connecting each paper stock liquid supply path of the manifold block and each dilution water supply path extending from the base end to the tip end of the manifold block via the dilution water flow path. This allows for a significant reduction in size by integrating the paths of each paper stock liquid supply path and each dilution water supply path into the manifold block.

[0022] In contrast, the opening in the pulp liquid supply housing allows for the insertion of a manifold block that has both a pulp liquid distribution function and a dilution water supply function, replacing the existing manifold block that only has a pulp liquid distribution function. Therefore, when adding the dilution water supply function to the pulp liquid distribution function, it is not necessary to individually connect each tubular dilution water supply passage from the width direction of the cylinder mold to each pulp liquid supply passage. Instead, it is sufficient to insert a manifold block that has both a pulp liquid distribution function and a dilution water supply function into the opening in the pulp liquid supply housing, replacing the old manifold block that only has a pulp liquid distribution function. As a result, the supply structure for pulp liquid and dilution water to the pulp liquid supply section becomes very simple, allowing for the provision of a compact manifold block, and enabling easy replacement of the old manifold block that only has a pulp liquid distribution function with a manifold block that also has a dilution water supply function.

[0023] Moreover, by grouping each dilution water flow path into a single unit or a plurality of units in the width direction of the cylinder mold according to the number of the dilution water supply paths, dilution water can be supplied from the dilution water supply path to each stock solution supply path in a substantially uniform manner in each of the grouped plural dilution water flow paths, while in each grouped single dilution water flow path, dilution water can be pinpoint-supplied from the dilution water supply path to the stock solution supply path. This makes it possible to optimally dilute the stock solution in each stock solution supply path in the width direction of the cylinder mold with the dilution water from each grouped dilution water flow path, and further improve the paper thickness accuracy in the width direction of papermaking.

[0024] Further, for each of the plurality of dilution water supply paths, the respective dilution water flow paths are grouped into a single unit or a plurality of consecutive units in the width direction of the cylinder mold, and the number of grouped dilution water flow paths near both end portions in the width direction of the cylinder mold is set to be smaller than the number of grouped dilution water flow paths near the central portion in the width direction of the cylinder mold. As a result, the supply efficiency near both end portions where dilution water is less likely to be supplied is improved compared to the vicinity of the central portion in the width direction of the cylinder mold, and the stock solution in each stock solution supply path can be optimally diluted in the width direction of the cylinder mold with the dilution water from each dilution water flow path, so that the paper thickness accuracy in the width direction of papermaking can be further improved.

[0025] Each dilution water supply path is recessed in a groove shape around the manifold block, and the respective opening surfaces are closed from the outside by a water stop plate, allowing dilution water to flow in the width direction of the cylinder mold. Accordingly, each dilution water supply path is configured simply by closing the opening surface of each dilution water supply path recessed in a groove shape on the peripheral surface of the manifold block from the outside with the water stop plate, and the operation can be simplified compared to the operation of drilling each dilution water supply path with a drill or the like. Brief Description of the Drawings

[0026] [Figure 1] This is a schematic front view of the vat of the cylinder paper machine according to the first embodiment of the present invention. [Figure 2]This is a schematic side view of Figure 1. [Figure 3] Figure 2 is a plan view of the paper pulp liquid supply housing containing the manifold block, as seen from the upstream paper pulp liquid supply section. [Figure 4] Figure 3 is a side view of the pulp liquid supply housing, seen from the side. [Figure 5] This is a plan view showing a portion of the manifold block removed from the pulp liquid supply housing shown in Figure 3, with a section cut out. [Figure 6] This is a side view of a portion of the manifold block shown in Figure 5, with a section cut out. [Figure 7] Figure 5 is a plan view showing the entire manifold block. [Figure 8] Figure 7 is a side view showing the entire manifold block from one side. [Figure 9] Figure 7 is a side view showing the entire manifold block from another side. [Figure 10] Figure 3 is a front enlargement view of the paper pulp liquid supply housing, seen from one side in the width direction of the cylinder mold. [Figure 11] Figure 10 is an enlarged plan view showing the front area of ​​the paper pulp liquid supply housing. [Figure 12] Figure 10 is an enlarged side view showing the front area of ​​the paper pulp liquid supply housing. [Figure 13] Figure 3 is a front view of the base end face of the manifold block, showing it inserted from the tip into the insertion hole of the paper pulp liquid supply housing. [Figure 14] This is a schematic front view showing a cylinder paper machine according to a second embodiment of the present invention, with multiple vats arranged side by side. [Figure 15] Figure 14 is a side view showing the entire manifold block inserted into the pulp liquid supply housing of the first vat, viewed from one side. [Figure 16] Figure 15 is a side view showing the entire manifold block from another side. [Figure 17] Figure 14 is a side view showing the entire manifold block inserted into the paper pulp liquid supply housing of the fifth vat, viewed from one side. [Figure 18]Figure 17 is a side view showing the entire manifold block from another side. [Figure 19] Figure 14 is a side view showing the entire manifold block inserted into the pulp liquid supply housing of the sixth vat, viewed from one side. [Figure 20] Figure 19 is a side view showing the entire manifold block from another side. [Figure 21] This is a front view of the base end face of a manifold block showing it inserted from the tip through the insertion hole of a paper pulp liquid supply housing according to a modified embodiment of the present invention, via a casing. [Figure 22] Figure 21 is a side view of the pulp liquid supply housing, seen from the side. [Figure 23] This is a plan view of the area near the base end of a manifold block according to another modified embodiment of the present invention. [Figure 24] Figure 23 is a side view of the base end of the manifold block. [Figure 25] This is a cross-sectional view along line AA in Figure 24. [Figure 26] Figure 23 is a front view of the base end face of the manifold block. [Modes for carrying out the invention]

[0027] Hereinafter, a cylinder screen paper machine according to an embodiment of the present invention will be described based on the drawings.

[0028] Figure 1 shows a schematic front view of the vat of a cylinder screen paper machine according to the first embodiment of the present invention, and Figure 2 shows a schematic side view of Figure 1.

[0029] In Figures 1 and 2, X1 is a cylinder wire mesh paper machine equipped with a vat 11 and a cylinder mold 12 that rotates within the vat 11 in the direction of the arrow in the figure. The vat 11 is equipped with a jet slice type flow box 14 that pressurizes and flows the pulp liquid into the wet paper forming region 13 on the circumferential surface where the mesh of the cylinder mold 12 is stretched.

[0030] The flow box 14 includes a slicing channel 15 as a paper stock liquid supply section that extends diagonally upward from the bottom of the bat 11 toward the cylinder mold 12, a diagonally upward apron 16 attached diagonally upward to the upper end of one wall of the slicing channel 15 on the side closer to the cylinder mold 12, with its tip in contact with the circumferential surface of the cylinder mold 12 to perform sealing, and a lip 17 that is pivotably attached to the upper end of the other wall of the slicing channel 15.

[0031] Then, when the pulp liquid is poured from the flow box 14 into the wet paper forming region 13 of the rotating cylinder mold 12, the white water is dewatered inside the cylinder mold 12 and forms a base on the wet paper forming region 13, becoming wet paper P. This is then transferred to an endless felt strip F that is fed from above by a coot roll 10 that is in contact with the cylinder mold 12, and is guided through a press part (not shown) to a dry part where it is dried to complete the papermaking process. The white water that has been dewatered inside the cylinder mold 12 is drained out from the lower part of the side wall of the bat 11 and guided to the suction port of a dilution pump 37, which will be described later.

[0032] Furthermore, the gap between the upper end of the lip 17 and the circumferential surface of the cylinder mold 12 can be adjusted by the oscillation of the lip 17. In this case, the wet paper formation region 13 on the circumferential surface of the cylinder mold 12 is the arc-shaped section of the circumferential surface of the cylinder mold 12 that corresponds to the area from the tip of the apron 16 to the water surface in the flow box 14 near the upper end of the lip 17.

[0033] Figure 3 is a plan view of the paper pulp liquid supply housing containing the manifold block shown in Figure 2, viewed from the upstream side of the paper pulp liquid supply section; Figure 4 is a side view of the paper pulp liquid supply housing shown in Figure 3, viewed from the side; Figure 5 is a plan view of a portion of the manifold block removed from the paper pulp liquid supply housing shown in Figure 3, with a cutout; and Figure 6 is a side view of a portion of the manifold block shown in Figure 5, with a cutout. Furthermore, Figure 7 is a plan view showing the entire manifold block shown in Figure 5; Figure 8 is a side view showing the entire manifold block shown in Figure 7 from one side; and Figure 9 is a side view showing the entire manifold block shown in Figure 7 from another side.

[0034] Furthermore, Figure 10 is an enlarged front view of the pulp liquid supply housing of Figure 3 as seen from one side in the width direction of the cylinder mold 12, Figure 11 is an enlarged plan view showing the vicinity of the front of the pulp liquid supply housing of Figure 10, Figure 12 is an enlarged side view showing the vicinity of the front of the pulp liquid supply housing of Figure 10, and Figure 13 is a front view of the vicinity of the base end face of the manifold block showing the state in which it is inserted from the tip into the insertion hole of the pulp liquid supply housing of Figure 3.

[0035] As shown in Figures 3 to 13, a paper pulp upstream supply passage 18 is provided upstream of the slicing channel 15 as a paper pulp upstream supply section for supplying paper pulp to the slicing channel 15. Between the slicing channel 15 and the paper pulp upstream supply passage 18, a long manifold block 19 is provided in the width direction of the cylinder mold 12 (front to back direction in Figure 1). This manifold block 19 contains 48 paper pulp supply passages a01 to a48 that supply paper pulp from the paper pulp upstream supply passage 18 to the slicing channel 15 individually from the width direction of the cylinder mold 12, and has a paper pulp supply function as a distributor that distributes paper pulp from the paper pulp upstream supply passage 18 to each of the paper pulp supply passages a01 to a48. Each of these paper pulp liquid supply passages a01 to a48 penetrates vertically through approximately the center of both the left and right sides of the manifold block 19, and communicates with the storage chamber 22 and the slicing passage 15, which will be described later, at equal intervals in the width direction of the cylinder mold 12, allowing the paper pulp liquid to flow between them.

[0036] The manifold block 19 is housed in a paper pulp liquid supply housing 20, which is provided between the slicing channel 15 and the upstream paper pulp liquid supply channel 18. The paper pulp liquid supply housing 20 is formed in a substantially U-shape when viewed from one side in the width direction of the cylinder mold 12 (the left side in Figures 11 and 12), and is formed to be elongated in the width direction of the cylinder mold 12 so that it is housed from the tip to the base end by being inserted into a substantially rectangular opening 21 that opens at the top of one side in the width direction of the cylinder mold 12. The upper end of the paper pulp liquid supply housing 20 is fixed to the lower end of the slicing channel 15.

[0037] A storage chamber 22 for storing paper pulp liquid is provided at the lower part of the paper pulp liquid supply housing 20, which is located directly below the manifold block 19 housed in the opening 21. This storage chamber 22 opens upward (towards the manifold block 19) and, like the manifold block 19, is formed to be elongated in the width direction of the cylinder mold 12. The bottom surface of the storage chamber 22 is sloped so that it becomes shallower from the other side in the width direction of the cylinder mold 12 (right side in Figures 3 and 4) to one side in the width direction (left side in Figures 3 and 4). An inlet 23 for introducing paper pulp liquid discharged from a paper pulp liquid pump (not shown) is provided at the other end of the storage chamber 22 (right end in Figures 3 and 4), while a return port 24 for returning the paper pulp liquid to a tank (not shown) according to the pressure inside the storage chamber 22 is provided at one end of the storage chamber 22 (left end in Figures 3 and 4). In this case, the manifold block 19 is integrated with the storage chamber 22 when housed in the opening 21 of the paper pulp liquid supply housing 20, with each paper pulp liquid supply passage a01 to a48 directly opening to the upper surface of the storage chamber 22.

[0038] Furthermore, a retaining plate 31 is attached to the periphery of the opening hole 21 of the pulp liquid supply housing 20, which is pressed against the base end face of the manifold block 19 when the manifold block 19 is inserted from the tip and held in place. This retaining plate 31 comprises substantially L-shaped projections 32, 32 that protrude from both the left and right positions on the periphery of the opening hole 21 of the pulp liquid supply housing 20, locking pieces 34, 34 having locking holes 33 that individually lock each projection 32 from both above and below, and bolt members 35 that are screwed into each locking piece 34 and whose tips are pressed against the left and right positions of the retaining plate 31. Then, the manifold block 19 is inserted through the opening 21 of the pulp liquid supply housing 20, and with each projection 32 individually locked into the locking holes 33 of the locking pieces 34, 34, the tips of each bolt member 35 are pressed against the left and right positions of the holding plate 31, respectively, thereby holding the manifold block 19 in a pressed state within the opening 21 of the pulp liquid supply housing 20.

[0039] Ten dilution water supply channels 40A to 40J, numbered 1 to 10, are provided on both the left and right sides of the manifold block 19, extending from the base end to the tip end. Of the dilution water supply channels 40A to 40J, the first to fifth dilution water supply channels 40A to 40E are provided on the right side of the manifold block 19 (the lower side in Figures 3, 5, and 7) at approximately equal intervals in the vertical direction (towards the front and back of the paper in Figures 3, 5, and 7), while the remaining sixth to tenth dilution water supply channels 40F to 40J are provided on the left side of the manifold block 19 (the upper side in Figures 3, 5, and 7) at approximately equal intervals in the vertical direction. In this case, the manifold block 19 is equipped with a guide piece 25 that extends in the width direction of the cylinder mold 12 near the 9th and 10th dilution water supply passages 40I and 40J, and this guide piece 25 allows for smooth insertion into and removal from the opening hole 21 of the pulp liquid supply housing 20.

[0040] The first to fifth diluted water supply channels 40A to 40E are arranged on the right side of the manifold block 19 in the order from top to bottom as the third, first, second, fourth, and fifth diluted water supply channels 40C, 40A, 40B, 40D, and 40E. On the other hand, the sixth to tenth diluted water supply channels 40F to 40J are arranged on the left side of the manifold block 19 in the order from top to bottom as the eighth, tenth, ninth, seventh, and sixth diluted water supply channels 40H, 40J, 40I, 40G, and 40F. Each of the dilution water supply passages 40A to 40E is drilled in a roughly U-shape in cross-section on both the left and right sides of the manifold block 19, and the openings of the third, first, second, fourth, and fifth dilution water supply passages 40C, 40A, 40B, 40D, and 40E are sealed from the outside by a single water-stopping plate 42, allowing the dilution water to flow in the width direction of the cylinder mold 12. On the other hand, the openings of the eighth, tenth, ninth, seventh, and sixth dilution water supply passages 40H, 40J, 40I, 40G, and 40F are sealed from the outside from top to bottom by three water-stopping plates 43 to 45, allowing the dilution water to flow in the width direction of the cylinder mold 12.

[0041] Furthermore, the retaining plate 31 has first to tenth communication ports 36a to 36j that are individually connected to the upstream end of each of the diluted water supply passages 40A to 40J, and are provided at approximately equal intervals in the vertical direction. The diluted water supplied to each of the diluted water supply passages 40A to 40J is guided to a valve stand 38 by a diluted water pump 37 installed near the bottom of the tub, and from this valve stand 38, the diluted water is individually supplied to each of the diluted water supply passages 40A to 40J via the first to tenth diluted water hoses 39a to 39j and the respective communication ports 36a to 36j. In this case, the valve stand 38 is provided with valves 38a, 38a, ... that individually adjust the amount of diluted water supplied to the first to tenth diluted water hoses 39a to 39j.

[0042] Here, the first to tenth diluted water supply channels 40A to 40J of the manifold block 19 will be explained in order based on the diagram.

[0043] First, as shown in Figures 6 and 8, the first dilution water supply passage 40A is equipped with three dilution water channels 46, 46, 46 that open only to selected first to third pulp liquid supply passages a01 to a03 from the first to 48 pulp liquid supply passages a01 to a48, and supply dilution water from the first dilution water supply passage 40A to each of them individually. The first dilution water supply passage 40A extends from the base end of the manifold block 19 toward the tip side to the third pulp liquid supply passage a03.

[0044] As shown in Figures 6 and 8, the second dilution water supply channel 40B is open only to the selected fourth to sixth pulp liquid supply channels a04 to a06 from the first to forty-eighth pulp liquid supply channels a01 to a48, and is equipped with three dilution water channels 46, 46, 46 that supply dilution water from the second dilution water supply channel 40B individually to each of them. The second dilution water supply channel 40B extends from the base end of the manifold block 19 toward the tip side to the sixth pulp liquid supply channel a06. At this time, the second dilution water supply channel 40B is not open to the first to third pulp liquid supply channels a01 to a03.

[0045] As shown in Figures 6 and 8, the third dilution water supply channel 40C is open only to the seventh to twelfth pulp liquid supply channels a07 to a12 selected from the first to forty-eighth pulp liquid supply channels a01 to a48, and is equipped with six dilution water channels 46, 46, ... that supply dilution water from the third dilution water supply channel 40C individually to each of them. The third dilution water supply channel 40C extends from the base end of the manifold block 19 toward the tip side to the twelfth pulp liquid supply channel a12, but does not open to the first to sixth pulp liquid supply channels a01 to a06.

[0046] As shown in Figures 6 and 8, the fourth dilution water supply channel 40D is open only to the selected 13th to 18th pulp liquid supply channels a13 to a18 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with six dilution water channels 46, 46, ... that supply dilution water from the fourth dilution water supply channel 40D to each of them individually. The fourth dilution water supply channel 40D extends from the base end of the manifold block 19 toward the tip side to the 18th pulp liquid supply channel a18, but does not open to the 1st to 12th pulp liquid supply channels a01 to a12.

[0047] As shown in Figures 6 and 8, the fifth dilution water supply channel 40E is open only to the selected 19th to 24th pulp liquid supply channels a19 to a24 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with six dilution water channels 46, 46, ... that supply dilution water from the fifth dilution water supply channel 40E to each of them individually. The fifth dilution water supply channel 40E extends from the base end of the manifold block 19 toward the tip side to the 24th pulp liquid supply channel a24, but does not open to the 1st to 18th pulp liquid supply channels a01 to a18.

[0048] Furthermore, as shown in Figure 9, the sixth dilution water supply channel 40F is equipped with six dilution water channels 46, 46, ... that open only to the selected 25th to 30th pulp liquid supply channels a25 to a30 from the 1st to 48th pulp liquid supply channels a01 to a48, and supply dilution water from the sixth dilution water supply channel 40F to each of them individually. The sixth dilution water supply channel 40F extends from the base end of the manifold block 19 toward the tip side to the 30th pulp liquid supply channel a30, but does not open to the 1st to 24th pulp liquid supply channels a01 to a24.

[0049] As shown in Figure 9, the seventh dilution water supply channel 40G is open only to the selected 31st to 36th pulp liquid supply channels a31 to a36 from the first to 48th pulp liquid supply channels a01 to a48, and is equipped with six dilution water channels 46, 46, ... that supply dilution water from the seventh dilution water supply channel 40G to each of them individually. The seventh dilution water supply channel 40G extends from the base end of the manifold block 19 toward the tip side to the 36th pulp liquid supply channel a36, but does not open to the first to 30th pulp liquid supply channels a01 to a30.

[0050] As shown in Figure 9, the eighth dilution water supply channel 40H is equipped with six dilution water channels 46, 46, ... that open only to the selected 37th to 42nd pulp liquid supply channels a37 to a42 from the 1st to 48th pulp liquid supply channels a01 to a48, and supply dilution water from the eighth dilution water supply channel 40H to each of them individually. The eighth dilution water supply channel 40H extends from the base end of the manifold block 19 toward the tip side to the 42nd pulp liquid supply channel a42, but does not open to the 1st to 36th pulp liquid supply channels a01 to a36.

[0051] As shown in Figure 9, the ninth dilution water supply channel 40I is equipped with three dilution water channels 46, 46, 46 that open only to the selected 43rd to 45th pulp liquid supply channels a43 to a45 from the 1st to 48th pulp liquid supply channels a01 to a48, and supply dilution water from the ninth dilution water supply channel 40I to each of them individually. The ninth dilution water supply channel 40I extends from the base end of the manifold block 19 toward the tip side to the 45th pulp liquid supply channel a45, but does not open to the 1st to 42nd pulp liquid supply channels a01 to a42.

[0052] As shown in Figure 9, the 10th dilution water supply channel 40J is equipped with three dilution water channels 46, 46, 46 that open only to the selected 46th to 48th pulp liquid supply channels a46 to a48 from the 1st to 48th pulp liquid supply channels a01 to a48, and each of them supplies dilution water from the 10th dilution water supply channel 40J individually. The 10th dilution water supply channel 40I extends from the base end of the manifold block 19 toward the tip side to the 48th pulp liquid supply channel a48, but does not open to the 1st to 45th pulp liquid supply channels a01 to a45.

[0053] Therefore, in this embodiment, the manifold block 19 between the slicing channel 15, which supplies the pulp liquid to the wet paper forming region 13 on the circumferential surface of the cylinder mold 12 rotating in the vat 11, and the upstream pulp liquid supply channel 18, which supplies the pulp liquid to the slicing channel 15, is provided with 48 pulp liquid supply channels a01 to a48 that individually supply the pulp liquid from the upstream pulp liquid supply channel 18 to the slicing channel 15 from the width direction of the cylinder mold 12, and 10 first to tenth dilution water supply channels 40A to 40J that extend from the base end to the tip end of the manifold block 19, and dilution water from each dilution water supply channel 40A to 40J is individually supplied to only 3 or 6 pulp liquid supply channels selected from each of the pulp liquid supply channels a01 to a48 without overlap.

[0054] Therefore, it is not necessary to separately provide tubular dilution water supply passages that are individually connected to each of the paper stock liquid supply passages a01 to a48 from the width direction of the cylinder mold 12. As a result, the supply structure of paper stock liquid and dilution water to the paper stock liquid supply section, that is, the structure of the manifold block 19, becomes very simple, and the manifold block 19 can be made more compact.

[0055] Furthermore, since the manifold block 19 is housed by insertion from its tip into the opening 21 of the pulp liquid supply housing 20 which opens on one side in the width direction of the cylinder mold 12, even if changes in specifications over time or adjustments or changes in the amount of pulp liquid and dilution water supplied to the slicing channel 15 are required, it is only necessary to form the optimal pulp liquid supply passages a01 to a48 and dilution water supply passages 40A to 40J in the manifold block 19 to meet those requirements. For this reason, even if changes in specifications over time or adjustments or changes in the amount of pulp liquid and dilution water supplied to the slicing channel 15 are required, it is not necessary to replace all of the pulp liquid supply passages and dilution water supply passages, as is the case with tubular pulp liquid and dilution water supply structures. As a result, only the manifold block with the optimal pulp liquid supply passages and dilution water supply passages formed therein needs to be replaced, thereby reducing replacement costs.

[0056] Furthermore, when replacing the manifold block 19, the manifold block 19 can be easily replaced by inserting and removing it from one side in the width direction of the cylinder mold 12 into the opening hole 21 of the paper pulp liquid supply housing 20.

[0057] Furthermore, the manifold block 19 has a paper pulp liquid supply function as a distributor that distributes the paper pulp liquid from the upstream supply passage 18 to the slice passage 15, as well as a dilution water supply function that individually supplies dilution water from each dilution water supply passage 40A to 40J to only one or more selected paper pulp liquid supply passages a01 to a48. As a result, dilution water can be individually supplied simply by selectively connecting each paper pulp liquid supply passage a01 to a48 of the manifold block 19 with each dilution water supply passage 40A to 40J extending from the base end to the tip end of the manifold block 19 via the dilution water passage 46. This allows for significant miniaturization by integrally providing the paths of each paper pulp liquid supply passage a01 to a48 and each dilution water supply passage 40A to 40J in the manifold block 19.

[0058] Furthermore, since each of the pulp liquid supply channels a01 to a48 is grouped into groups of 3 or 6 in the width direction of the cylinder mold 12, corresponding to the 10 first to tenth dilution water supply channels 40A to 40J, the first, second, ninth, and tenth dilution water supply channels 40A, 40B, 40I, and 40J, which are grouped into groups of 6, supply dilution water to each of the pulp liquid supply channels a01 to a04 and a45 to a48 from the dilution water channels 46, 46, ... in almost the same manner, while the third to eighth dilution water supply channels 40C to 40H, which are grouped into groups of 3, supply dilution water to each of the pulp liquid supply channels a05 to a44 from the dilution water channels 46, 46, ... with almost pinpoint accuracy. This makes it possible to optimally dilute the pulp liquid in each pulp liquid supply path a01 to a48 in the width direction of the cylinder mold 12 using the diluting water from each grouped diluting water supply path 40A to 40J, thereby improving the paper thickness accuracy in the width direction of the wet paper P.

[0059] Furthermore, when each pulp liquid supply path a01 to a48 is grouped into groups of 3 or 6 in the width direction of the cylinder mold 12, the number of the 1st, 2nd, 9th and 10th dilution water supply paths 40A, 40B, 40I and 40J, which are grouped near both ends, is set to 3 each. On the other hand, the number of the 3rd to 8th dilution water supply paths 40C to 40H, which are grouped near the center in the width direction of the cylinder mold 12, is set to 6 each, so that the number of the 1st, 2nd, 9th and 10th dilution water supply paths 40A, 40B, 40I and 40J near both ends is less than the number of the 3rd to 8th dilution water supply paths 40C to 40H near the center. As a result, the supply efficiency of diluting water is improved near both ends of the cylinder mold 12, where it is more difficult to supply diluting water compared to the central part in the width direction. This makes it possible to optimally dilute the paper stock liquid in each paper stock liquid supply path a01 to a48 in the width direction of the cylinder mold 12 with the diluting water from each paper stock liquid supply path a01 to a48, thereby further improving the paper thickness accuracy in the width direction of the wet paper P.

[0060] Furthermore, each of the diluted water supply passages 40A to 40J is recessed in a groove-like manner on both the left and right sides of the manifold block 19, and the openings of each passage are sealed from the outside by water-stopping plates 42 to 45, allowing the diluted water to flow in the width direction of the cylinder mold 12. As a result, each of the diluted water supply passages 40A to 40J can be formed simply by sealing the openings on both the left and right sides of the manifold block 19 from the outside with water-stopping plates 42 to 45, making it very easy to form each of the diluted water supply passages 40A to 40J.

[0061] Next, a second embodiment of the present invention will be described based on the drawings.

[0062] In this embodiment, a cylinder paper machine with six trays arranged side by side is used.

[0063] Figure 14 shows a schematic front view of a cylinder paper machine according to a second embodiment of the present invention, in which multiple vats are arranged side by side.

[0064] In other words, this embodiment shows a cylinder paper machine X2 using six first to sixth bats 11a to 11f, where each of these bats 11a to 11f is arranged in parallel in the feeding direction of the wet paper P (papermaking) which is sequentially fed by an endless felt strip F. Since each of the bats 11a to 11f has the same configuration as the bats in the first embodiment described above, a detailed explanation will be omitted.

[0065] Figure 15 is a side view showing the entire manifold block 19 inserted into the pulp liquid supply housing 20 of the first bat 11a in Figure 14, and Figure 16 is a side view showing the entire manifold block 19 of Figure 15 from the other side. Figure 17 is a side view showing the entire manifold block 19 inserted into the pulp liquid supply housing 20 of the fifth bat 11e in Figure 14, and Figure 18 is a side view showing the entire manifold block 19 of Figure 17 from the other side. Furthermore, Figure 19 is a side view showing the entire manifold block 19 inserted into the pulp liquid supply housing 20 of the sixth bat 11f in Figure 14, and Figure 20 is a side view showing the entire manifold block 19 of Figure 19 from the other side.

[0066] As shown in Figures 15 to 20, this cylinder paper machine X2 uses three first, fifth, and sixth bats 11a, 11e, and 11f selected from the first to sixth bats 11a to 11f.

[0067] Here, the first to tenth diluted water supply channels 51A to 51J of the manifold block 19 used in the first butt 11a, the first to tenth diluted water supply channels 55A to 55J of the manifold block 19 used in the fifth butt 11e, and the first to tenth diluted water supply channels 56A to 56J of the manifold block 19 used in the sixth butt 11f will be described in order based on the drawings.

[0068] First, as shown in Figure 15, the first dilution water supply channel 51A of the manifold block 19 used in the first bat 11a is open only to the first selected pulp liquid supply channel a01 among the first to 48 pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the first dilution water supply channel 51A. The first dilution water supply channel 51A extends from the base end of the manifold block 19 toward the tip side to the first pulp liquid supply channel a01.

[0069] As shown in Figure 15, the second dilution water supply channel 51B opens only to the selected fourth pulp liquid supply channel a04 among the first to forty-eight pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the second dilution water supply channel 51B. The second dilution water supply channel 51B extends from the base end of the manifold block 19 toward the tip side to the fourth pulp liquid supply channel a04. At this time, the second dilution water supply channel 51B does not open to the first to third pulp liquid supply channels a01 to a03.

[0070] As shown in Figure 15, the third dilution water supply channel 51C is open only to the seventh and eighth pulp liquid supply channels a07 and a08 selected from the first to forty-eighth pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the third dilution water supply channel 51C individually to each of them. The third dilution water supply channel 51C extends from the base end of the manifold block 19 toward the tip side to the eighth pulp liquid supply channel a08, but does not open to the first to sixth pulp liquid supply channels a01 to a06.

[0071] As shown in Figure 15, the fourth dilution water supply channel 51D is open only to the selected 13th and 14th pulp liquid supply channels a13 and a14 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the fourth dilution water supply channel 51D to each of them individually. The fourth dilution water supply channel 51D extends from the base end of the manifold block 19 toward the tip side to the 14th pulp liquid supply channel a14, but does not open to the 1st to 12th pulp liquid supply channels a01 to a12.

[0072] As shown in Figure 15, the fifth dilution water supply channel 51E is open only to the selected 19th and 20th pulp liquid supply channels a19 and a20 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the fifth dilution water supply channel 51E individually to each of them. The fifth dilution water supply channel 51E extends from the base end of the manifold block 19 toward the tip side to the 24th pulp liquid supply channel a20, but does not open to the 1st to 18th pulp liquid supply channels a01 to a18.

[0073] Furthermore, as shown in Figure 16, the sixth dilution water supply channel 51F is open only to the selected 25th and 26th pulp liquid supply channels a25 and a26 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the sixth dilution water supply channel 51F individually to each. The sixth dilution water supply channel 51F extends from the base end of the manifold block 19 toward the tip side to the 26th pulp liquid supply channel a26, but does not open to the 1st to 24th pulp liquid supply channels a01 to a24.

[0074] As shown in Figure 16, the seventh dilution water supply channel 51G is equipped with two dilution water channels 46, 46 that open only to the selected 31st and 32nd pulp liquid supply channels a31 and a32 from the 1st to 48th pulp liquid supply channels a01 to a48, and supply dilution water from the seventh dilution water supply channel 51G to each of them individually. The seventh dilution water supply channel 51G extends from the base end of the manifold block 19 toward the tip side to the 32nd pulp liquid supply channel a32, but does not open to the 1st to 30th pulp liquid supply channels a01 to a30.

[0075] As shown in Figure 16, the eighth dilution water supply channel 51H is open only to the selected 37th and 38th pulp liquid supply channels a37 and a38 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the eighth dilution water supply channel 51H individually to each of them. The eighth dilution water supply channel 51H extends from the base end of the manifold block 19 toward the tip side to the 38th pulp liquid supply channel a38, but does not open to the 1st to 36th pulp liquid supply channels a01 to a36.

[0076] As shown in Figure 16, the ninth dilution water supply channel 51I is open only to the selected 43rd pulp liquid supply channel a43 among the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the ninth dilution water supply channel 51I. The ninth dilution water supply channel 51I extends from the base end of the manifold block 19 toward the tip side to the 43rd pulp liquid supply channel a43, but does not open to the 1st to 42nd pulp liquid supply channels a01 to a42.

[0077] As shown in Figure 16, the 10th dilution water supply channel 51J is open only to the 46th pulp liquid supply channel a46, which is selected from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the 10th dilution water supply channel 51J. The 10th dilution water supply channel 51I extends from the base end of the manifold block 19 toward the tip side to the 46th pulp liquid supply channel a46, but does not open to the 1st to 45th pulp liquid supply channels a01 to a45.

[0078] Next, as shown in Figure 17, the first dilution water supply channel 55A of the manifold block 19 used in the fifth butt 11e opens only to a selected second pulp liquid supply channel a02 from the first to forty-eight pulp liquid supply channels a01 to a48, and is equipped with a dilution water channel 46 that supplies dilution water from the first dilution water supply channel 55A. The first dilution water supply channel 55A extends from the base end of the manifold block 19 toward the tip side to the second pulp liquid supply channel a02. In this case, the second dilution water supply channel 55B does not open to the first pulp liquid supply channel a01.

[0079] As shown in Figure 17, the second dilution water supply channel 55B opens only to the fifth pulp liquid supply channel a05, which is selected from the first to forty-eight pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the second dilution water supply channel 55B. The second dilution water supply channel 55B extends from the base end of the manifold block 19 toward the tip side to the fifth pulp liquid supply channel a05, but does not open to the first to fourth pulp liquid supply channels a01 to a04.

[0080] As shown in Figure 17, the third dilution water supply channel 55C is open only to the selected 9th and 10th pulp liquid supply channels a09 and a10 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the third dilution water supply channel 55C individually to each of them. The third dilution water supply channel 55C extends from the base end of the manifold block 19 toward the tip side to the 10th pulp liquid supply channel a10, but does not open to the 1st to 8th pulp liquid supply channels a01 to a08.

[0081] As shown in Figure 17, the fourth dilution water supply channel 55D is open only to the selected 15th and 16th pulp liquid supply channels a15 and a16 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the fourth dilution water supply channel 55D individually to each of them. The fourth dilution water supply channel 55D extends from the base end of the manifold block 19 toward the tip side to the 16th pulp liquid supply channel a16, but does not open to the 1st to 14th pulp liquid supply channels a01 to a14.

[0082] As shown in Figure 17, the fifth dilution water supply channel 55E is open only to the selected 21st and 22nd pulp liquid supply channels a21 and a22 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the fifth dilution water supply channel 55E individually to each of them. The fifth dilution water supply channel 55E extends from the base end of the manifold block 19 toward the tip side to the 22nd pulp liquid supply channel a22, but does not open to the 1st to 20th pulp liquid supply channels a01 to a20.

[0083] Furthermore, as shown in Figure 18, the sixth dilution water supply channel 55F is equipped with two dilution water channels 46, 46 that open only to the selected 27th and 28th pulp liquid supply channels a27, a28 from the 1st to 48th pulp liquid supply channels a01 to a48, and supply dilution water from the sixth dilution water supply channel 55F individually to each. The sixth dilution water supply channel 55F extends from the base end of the manifold block 19 toward the tip side to the 28th pulp liquid supply channel a28, but does not open to the 1st to 26th pulp liquid supply channels a01 to a26.

[0084] As shown in Figure 18, the seventh dilution water supply channel 55G is equipped with two dilution water channels 46, 46 that open only to the selected 33rd and 34th pulp liquid supply channels a33 and a34 from the 1st to 48th pulp liquid supply channels a01 to a48, and supply dilution water from the seventh dilution water supply channel 55G to each of them individually. The seventh dilution water supply channel 55G extends from the base end of the manifold block 19 toward the tip side to the 34th pulp liquid supply channel a34, but does not open to the 1st to 30th pulp liquid supply channels a01 to a32.

[0085] As shown in Figure 18, the eighth dilution water supply channel 55H is equipped with two dilution water channels 46, 46 that open only to the selected 39th and 40th pulp liquid supply channels a39 and a40 from the 1st to 48th pulp liquid supply channels a01 to a48, and supply dilution water from the eighth dilution water supply channel 55H to each of them individually. The eighth dilution water supply channel 55H extends from the base end of the manifold block 19 toward the tip side to the 40th pulp liquid supply channel a40, but does not open to the 1st to 38th pulp liquid supply channels a01 to a38.

[0086] As shown in Figure 18, the ninth dilution water supply channel 55I is open only to the selected 44th pulp liquid supply channel a44 from the first to 48 pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the ninth dilution water supply channel 55I. The ninth dilution water supply channel 55I extends from the base end of the manifold block 19 toward the tip side to the 44th pulp liquid supply channel a44, but does not open to the first to 43rd pulp liquid supply channels a01 to a43.

[0087] As shown in Figure 18, the 10th dilution water supply channel 55J is open only to the 47th pulp liquid supply channel a47, which is selected from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the 10th dilution water supply channel 55J. The 10th dilution water supply channel 55I extends from the base end of the manifold block 19 toward the tip side to the 47th pulp liquid supply channel a47, but does not open to the 1st to 46th pulp liquid supply channels a01 to a46.

[0088] Furthermore, as shown in Figure 19, the first dilution water supply channel 56A of the manifold block 19 used in the sixth butt 11f opens only to the selected third pulp liquid supply channel a03 among the first to forty-eight pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the first dilution water supply channel 56A. The first dilution water supply channel 56A extends from the base end of the manifold block 19 toward the tip side to the second pulp liquid supply channel a03, but does not open to the first and second pulp liquid supply channels a01 and a02.

[0089] As shown in Figure 19, the second dilution water supply channel 56B is open only to the selected sixth pulp liquid supply channel a06 among the first to forty-eight pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the second dilution water supply channel 56B. The second dilution water supply channel 56B extends from the base end of the manifold block 19 toward the tip side to the fifth pulp liquid supply channel a06, but does not open to the first to fifth pulp liquid supply channels a01 to a05.

[0090] As shown in Figure 19, the third dilution water supply channel 56C is open only to the selected 11th and 12th pulp liquid supply channels a11 and a12 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the third dilution water supply channel 56C individually to each. The third dilution water supply channel 56C extends from the base end of the manifold block 19 toward the tip side to the 12th pulp liquid supply channel a12, but does not open to the 1st to 11th pulp liquid supply channels a01 to a11.

[0091] As shown in Figure 19, the fourth dilution water supply channel 56D is open only to the selected 17th and 18th pulp liquid supply channels a17 and a18 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the fourth dilution water supply channel 56D individually to each of them. The fourth dilution water supply channel 56D extends from the base end of the manifold block 19 toward the tip side to the 18th pulp liquid supply channel a18, but does not open to the 1st to 16th pulp liquid supply channels a01 to a16.

[0092] As shown in Figure 19, the fifth dilution water supply channel 56E is open only to the selected 23rd and 24th pulp liquid supply channels a23 and a24 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the fifth dilution water supply channel 56E individually to each of them. The fifth dilution water supply channel 56E extends from the base end of the manifold block 19 toward the tip side to the 22nd pulp liquid supply channel a24, but does not open to the 1st to 22nd pulp liquid supply channels a01 to a22.

[0093] Furthermore, as shown in Figure 20, the sixth dilution water supply channel 56F is equipped with two dilution water channels 46, 46 that open only to the selected 29th and 30th pulp liquid supply channels a29 and a30 from the 1st to 48th pulp liquid supply channels a01 to a48, and supply dilution water from the sixth dilution water supply channel 56F individually to each. The sixth dilution water supply channel 56F extends from the base end of the manifold block 19 toward the tip side to the 30th pulp liquid supply channel a30, but does not open to the 1st to 28th pulp liquid supply channels a01 to a28.

[0094] As shown in Figure 20, the seventh dilution water supply channel 56G is open only to the selected 35th and 36th pulp liquid supply channels a35 and a36 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the seventh dilution water supply channel 56G individually to each. The seventh dilution water supply channel 56G extends from the base end of the manifold block 19 toward the tip side to the 36th pulp liquid supply channel a36, but does not open to the 1st to 34th pulp liquid supply channels a01 to a34.

[0095] As shown in Figure 20, the eighth dilution water supply channel 56H is open only to the selected 41st and 42nd pulp liquid supply channels a41 and a42 from the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the eighth dilution water supply channel 56H individually to each of them. The eighth dilution water supply channel 56H extends from the base end of the manifold block 19 toward the tip side to the 42nd pulp liquid supply channel a42, but does not open to the 1st to 40th pulp liquid supply channels a01 to a40.

[0096] As shown in Figure 20, the ninth dilution water supply channel 56I is open only to the selected 45th pulp liquid supply channel a45 from the first to 48th pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the ninth dilution water supply channel 56I. The ninth dilution water supply channel 56I extends from the base end of the manifold block 19 toward the tip side to the 45th pulp liquid supply channel a45, but does not open to the first to 44th pulp liquid supply channels a01 to a44.

[0097] As shown in Figure 20, the 10th dilution water supply channel 56J is open only to the selected 48th pulp liquid supply channel a48 out of the 1st to 48th pulp liquid supply channels a01 to a48, and is equipped with one dilution water channel 46 that supplies dilution water from the 10th dilution water supply channel 56J. The 10th dilution water supply channel 56I extends from the base end of the manifold block 19 toward the tip side to the 48th pulp liquid supply channel a48, but does not open to the 1st to 47th pulp liquid supply channels a01 to a47.

[0098] Therefore, in this embodiment, three first, fifth, and sixth bats 11a, 11e, and 11f selected from the six bats 11a to 11f arranged in parallel are used. As a result, the number of dilution water channels 46 that supply dilution water to each paper stock liquid supply channel a01 to a48 in the width direction of the cylinder mold 12 is further subdivided and reduced for each of the three bats 11a, 11e, and 11f. This makes it possible to supply dilution water to each desired paper stock liquid supply channel a01 to a48 with almost pinpoint accuracy. This makes it possible to optimally dilute the paper stock liquid in the width direction of the cylinder mold by supplying dilution water to each desired paper stock liquid supply channel a01 to a48 with almost pinpoint accuracy, and further improves the paper thickness accuracy in the width direction of the wet paper P.

[0099] Furthermore, by using three first, fifth, and sixth bats 11a, 11e, and 11f selected from the six bats 11a to 11f arranged in parallel, diluting water is supplied to each paper stock liquid supply path a01 to a48 in the width direction of the cylinder mold 12 for each of the three bats 11a, 11e, and 11f, and the number of diluting water flow paths 46 grouped in the width direction of the cylinder mold 12 according to each bat 11a, 11e, and 11f is further subdivided and reduced. As a result, it becomes possible to supply diluting water from each diluting water flow path 46 to each desired paper stock liquid supply path a01 to a48 with almost pinpoint accuracy. This makes it possible to optimally dilute the paper stock liquid in the width direction of the cylinder mold 12 by supplying diluting water to each desired paper stock liquid supply path a01 to a48 with almost pinpoint accuracy, and further improves the paper thickness accuracy in the width direction of the wet paper P.

[0100] Furthermore, since diluting water is supplied to each pulp liquid supply path a01 to a48 in the width direction of the cylinder mold 12 for each of the three bats 11a, 11e, and 11f, the number of pulp liquid supply paths a01 to a48 that are grouped in the width direction of the cylinder mold 12 according to each bat 11a, 11e, and 11f is further subdivided and reduced. As a result, it becomes possible to supply diluting water to each pulp liquid supply path a01 to a48 with almost pinpoint accuracy. This makes it possible to optimally dilute the pulp liquid in the width direction of the cylinder mold 12 by supplying diluting water to each of the further subdivided pulp liquid supply paths a01 to a48, and further improves the paper thickness accuracy in the width direction of the wet paper P.

[0101] Furthermore, each paper stock liquid supply path a01 to a48 is grouped into one or two groups in the width direction of the cylinder mold 12 for each of the three bats 11a, 11e, and 11f, with the number of each paper stock liquid supply path a01 to a48 grouped near both ends being set to one. On the other hand, the number of each paper stock liquid supply path a01 to a48 grouped near the center in the width direction of the cylinder mold 12 is set to two, so that the number of each paper stock liquid supply path a01 to a48 grouped near both ends is less than the number of each paper stock liquid supply path a01 to a48 grouped near the center. As a result, the supply efficiency of diluting water is improved near both ends of the cylinder mold 12, where it is more difficult to supply diluting water compared to the central part in the width direction. This makes it possible to optimally dilute the paper stock liquid in each paper stock liquid supply path a01 to a48 in the width direction of the cylinder mold 12 by supplying it with diluting water, thereby further improving the accuracy of the paper thickness in the width direction of the wet paper P.

[0102] It should be noted that the present invention is not limited to the embodiments described above, but encompasses a variety of other modifications. For example, in the first embodiment, a manifold block 19 having a paper stock liquid distribution function and a dilution water supply function is housed in the opening 21 of the paper stock liquid supply housing 20. However, as shown in Figures 21 and 22, an existing old manifold block (not shown) having only a paper stock liquid distribution function as a distributor that distributes paper stock liquid from the upstream paper stock liquid supply section to each paper stock liquid supply path is inserted through the opening 63 of the paper stock liquid supply housing 62. On the other hand, a manifold block 61 having a paper stock liquid distribution function and a dilution water supply function may be inserted in place of the old manifold block. This manifold block 61 is inserted between a pair of left and right support pieces 64, 64 attached to the periphery of the opening 63 of the paper stock liquid supply housing 62, and is fixed to the lower end of the slice channel 15 via these two support pieces 64, 64.

[0103] In this case, the openings of the third, first, second, fourth, and fifth dilution water supply passages 40C, 40A, 40B, 40D, and 40E are sealed from the outside by a single water-stopping plate 66, allowing the dilution water to flow in the width direction of the cylinder mold 12. On the other hand, the openings of the eighth, tenth, ninth, seventh, and sixth dilution water supply passages 40H, 40J, 40I, 40G, and 40F are also sealed from the outside by a single water-stopping plate 67, allowing the dilution water to flow in the width direction of the cylinder mold 12.

[0104] In short, in this modification, a manifold block 61 having both a manifold liquid distribution function and a dilution water supply function can be inserted into the opening 63 of the manifold liquid supply housing 62, replacing the existing manifold block that only has a manifold liquid distribution function. Therefore, when adding the dilution water supply function to the manifold liquid distribution function, it is not necessary to individually connect each tubular dilution water supply passage from the width direction of the cylinder mold to each manifold liquid supply passage. Instead, it is sufficient to insert the manifold block 61, which has both a manifold liquid distribution function and a dilution water supply function, into the opening 63 of the manifold liquid supply housing 62, replacing the old manifold block that only has a manifold liquid distribution function. As a result, the supply structure of manifold liquid and dilution water to the slicing channel 15 becomes very simple, a compact manifold block 61 can be provided, and the old manifold block with only a manifold liquid distribution function can be easily replaced with the manifold block 61 which also has a dilution water supply function.

[0105] Furthermore, as another modification, the manifold block 61 shown in Figures 21 and 22 is inserted around the opening 63 of the paper pulp liquid supply housing 62 via a casing 64, while as shown in Figures 23 to 26, an I-shaped manifold block 71 may be inserted into the opening 63 of the paper pulp liquid supply housing 62. In other words, in this manifold block 71, ten dilution water supply pipes 72A to 72J are arranged in the spaces 72, 72 on both the left and right sides of the manifold block 71, with five pipes extending from the base end to the tip end of the manifold block 71. Dilution water from the first to tenth dilution water hoses 39a to 39j is supplied to each of the dilution water supply pipes 72A to 72J via a touch tube 73 screwed into the retaining plate 31 on the base end face of the manifold block 71. On the other hand, each dilution water supply pipe 72A to 72J is fitted with a block manifold 74, which is provided with a dilution water flow path 46 that opens only to a selected paper stock liquid supply path from the 1st to 48th paper stock liquid supply paths a01 to a48 and supplies the dilution water from the respective dilution water supply pipe individually. In this case, each block manifold 74 is fitted into the space 72 and holds the dilution water hoses 39a to 39j within the space 72.

[0106] Here, the first to fifth dilution water supply pipes 72A to 72E among the first to tenth dilution water supply pipes 72A to 72J of the manifold block 71 will be described in order based on the drawings. As shown in Figures 23 and 24, the first dilution water supply pipe 72A of the manifold block 71 is open only to the first and second pulp liquid supply passages a01 and a02 selected from the first to 48 pulp liquid supply passages a01 to a48, and is equipped with two dilution water flow channels 46, 46 that supply dilution water from the first dilution water supply pipe 72A. This first dilution water supply pipe 72A is in communication with the first and second pulp liquid supply passages a01 and a02 via the block manifold 74 and each dilution water flow channel 46.

[0107] Furthermore, the second dilution water supply pipe 72B of the manifold block 71 is open only to the fifth and sixth pulp liquid supply passages a05 and a06 selected from the first to forty-eight pulp liquid supply passages a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the second dilution water supply pipe 72B. This second dilution water supply pipe 72B is in communication with the fifth and sixth pulp liquid supply passages a05 and a06 via the block manifold 74 and each dilution water channel 46.

[0108] Furthermore, the third dilution water supply pipe 72C of the manifold block 71 is open only to the ninth and tenth pulp liquid supply passages a09 and a10 selected from the first to forty-eight pulp liquid supply passages a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the third dilution water supply pipe 72C. This third dilution water supply pipe 72C is in communication with the ninth and tenth pulp liquid supply passages a09 and a10 via the block manifold 74 and each dilution water channel 46.

[0109] Furthermore, the fourth dilution water supply pipe 72D of the manifold block 71 is open only to the 13th and 14th pulp liquid supply passages a13 and a14 selected from the 1st to 48th pulp liquid supply passages a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the fourth dilution water supply pipe 72D. This fourth dilution water supply pipe 72D is in communication with the 13th and 14th pulp liquid supply passages a13 and a14 via the block manifold 74 and each dilution water channel 46.

[0110] Furthermore, the fifth dilution water supply pipe 72E of the manifold block 71 is open only to the 17th and 18th pulp liquid supply passages a17 and a18 selected from the 1st to 48th pulp liquid supply passages a01 to a48, and is equipped with two dilution water channels 46, 46 that supply dilution water from the fifth dilution water supply pipe 72E. This fifth dilution water supply pipe 72E is in communication with the 17th and 18th pulp liquid supply passages a17 and a18 via the block manifold 74 and each dilution water channel 46.

[0111] In the other modifications described above, the manifold block 71 has a paper stock liquid distribution function via the first to 48 paper stock liquid supply passages a01 to a48, and a dilution water supply function which supplies dilution water from dilution water supply pipes 72A to 72J to each of the paper stock liquid supply passages a01 to a48 via the dilution water flow path 46, and is inserted into the opening 63 of the paper stock liquid supply housing 62. This makes it possible to insert the manifold block 71 into the opening 63 of the paper stock liquid supply housing 62, making the supply structure for paper stock liquid and dilution water to the slicing flow path 15 very simple and providing a compact manifold block 71.

[0112] Furthermore, in the other modifications described above, in the I-type manifold block 71, the diluted water from each diluted water supply pipe 72A to 72J located in both spaces 72, 72 is supplied via the diluted water flow path 46 only to the selected paper pulp liquid supply path among the 1st to 48th paper pulp liquid supply paths a01 to a48. Therefore, the manifold block 71, which has both a paper pulp liquid distribution function and a diluted water supply function, can be easily replaced by simply inserting it into the opening 63 of the paper pulp liquid supply housing 62.

[0113] Furthermore, in the second embodiment described above, three selected first, fifth, and sixth bats 11a, 11e, and 11f from the first to sixth bats 11a to 11f were used, but one, two, or four or more selected bats from the first to sixth bats may be used. Moreover, the number of bats is not limited to six, and seven or more bats may be used.

[0114] Furthermore, in each of the above embodiments and modifications, a total of 10 first to 10 diluted water supply passages 40A, 51A, 55A, 56A to 40J, 51J, 55J, 56J are provided on both the left and right sides of the manifold block 19, but fewer than 10 or 11 or more diluted water supply passages may be provided.

[0115] Furthermore, in the above embodiments and modifications, each dilution water supply passage 40A to 40J is recessed in the left and right sides of the manifold block 19, and the openings are sealed from the outside with water-stopping plates 42 to 45, 66, and 67. However, dilution water supply passages extending from the base end face of the manifold block 19 toward the tip may be drilled by a drill or the like. [Explanation of Symbols]

[0116] 11 Bat 11a~11f Bats 1 to 6 12 Cylinder molds 13 Wet paper forming area 14 Flowbox 15. Slice channel (paper stock liquid supply section) 18 Paper stock liquid upstream supply path (paper stock liquid upstream supply section) a01~a48 1st~48th stock liquid supply path 19. Manifold Block 20 Paper stock liquid supply housing 21 Opening hole 40A~40J 1st~10th dilution water supply path 42-45 Water stop plate 46 Dilution water channel 51A~51J 1st~10th dilution water supply path 55A~55J 1st~10th dilution water supply path 56A~56J 1st~10th dilution water supply path 61. Manifold Block 62 Paper stock liquid supply housing 63 Opening hole 66, 67 Water stop plate 71. Manifold Block 72A~72J 1st~10th dilution water supply pipe (dilution water supply path) X1,X2 Cylindrical paper machine

Claims

1. In a cylinder screen paper machine that supplies pulp liquid to the wet forming region on the circumferential surface of a cylinder mold rotating inside a vat, A paper stock liquid supply unit is provided on the tray facing the wet paper forming region on the circumferential surface of the cylinder mold, and supplies paper stock liquid to the wet paper forming region of the cylinder mold over substantially the entire width of the cylinder mold; A paper pulp liquid upstream supply unit is provided on the upstream side of the aforementioned paper pulp liquid supply unit and supplies paper pulp liquid to the said paper pulp liquid supply unit, A manifold block is provided between the paper pulp liquid supply unit and the paper pulp liquid upstream supply unit, and contains a plurality of paper pulp liquid supply passages that individually supply paper pulp liquid from the paper pulp liquid upstream supply unit to the paper pulp liquid supply unit from the width direction of the cylinder mold, A paper pulp liquid supply housing is formed to be elongated in the width direction of the cylinder mold, and the manifold block is housed in an opening that opens on one side of the cylinder mold in the width direction by being inserted from its tip, Dilution water supply channels extending from the base end toward the tip end of the aforementioned manifold block, Multiple dilution water channels that open only to one or more selected paper stock liquid supply channels from among the aforementioned paper stock liquid supply channels, and that supply dilution water from the dilution water supply channels individually to each of them, A cylinder wire paper machine characterized by being equipped with the following features.

2. The cylinder screen paper machine according to claim 1, wherein multiple trays are arranged in parallel, and multiple trays selected from among them are used.

3. The cylinder screen paper machine according to claim 1 or 2, wherein the manifold block has a paper pulp distribution function as a distributor that distributes paper pulp from the upstream paper pulp supply section to each of the paper pulp supply passages, and also has a dilution water supply function that supplies dilution water from the dilution water supply passage only to a selected paper pulp supply passage among the paper pulp supply passages via the dilution water flow path.

4. The cylinder screen paper machine according to claim 3, wherein an existing old manifold block having only a paper pulp liquid distribution function as a distributor that distributes paper pulp liquid from the upstream paper pulp liquid supply unit to each of the paper pulp liquid supply passages is inserted through the opening of the paper pulp liquid supply housing, while a manifold block having a dilution water supply function that, in addition to the paper pulp liquid distribution function, also has a dilution water supply function that supplies dilution water from the dilution water supply passage to a selected paper pulp liquid supply passage from among the paper pulp liquid supply passages via the dilution water flow path is insertable in place of the old manifold block.

5. The cylinder screen paper machine according to claim 1 or claim 2, wherein each of the dilution water channels is grouped into single or multiple groups in the width direction of the cylinder mold according to the number of each dilution water supply channel.

6. The cylinder wire paper machine according to claim 5, wherein each of the dilution water channels is grouped into single or continuous groups in the width direction of the cylinder mold according to the number of each dilution water supply channel, and the number of groups near the center in the width direction of the cylinder mold is greater than the number of groups near both ends in the width direction of the cylinder mold.

7. The cylinder wire paper machine according to claim 1 or claim 2, wherein each of the dilution water supply passages is recessed in a groove-like manner on the circumferential surface of the manifold block, and the opening surface of each passage is sealed from the outside by a water-stopping plate, thereby enabling the flow of dilution water in the width direction of the cylinder mold.

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