JPH07509543A - Tissue manufacturing equipment and manufacturing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Name: T. Shuri's Announcement and Announcement Type Ω back weight Yosho Ω field The present invention relates to a tissue manufacturing apparatus for manufacturing tissue from paper stock. Especially books The invention relates to a tissue manufacturing apparatus including a Yankee dryer.

Information disclosure Ω confession Typically, during tissue manufacturing, the web moves the stock from the headbox to the forming section. Formed by discharging onto a forming wire. Then the web formed is , subjected to a pressing operation to remove at least a portion of the moisture from the web.

The partially dehydrated web is then passed around the heated surface of a Yankee dryer. You will be guided. A Yankee dryer is basically a rotating dryer with a diameter of about 25 feet. It is a cylinder. This cylinder is internally connected to a superheated steam source, so The web is dried as it is guided around the circumferential surface of the heating cylinder.

The dried web is then doctored from the surface of the cylinder and wound onto a reel. It will be destroyed. Drying the web while it is being fed around the Yankee dryer An air cap surrounds at least a portion of the circumferential surface of the cylinder to aid in drying. . To improve the web drying process, heating is applied from the air camp to the surface of the web. lead a.

Provides a through-drying method that involves blowing hot air through the formed web. By providing a No parts needed.

No press is required, which greatly reduces the installation cost of tissue manufacturing equipment. Rather, the foregoing through-drying device or air impingement configuration of the present invention improves tissue production speed. greatly increase the degree.

Therefore, by providing the aforementioned air drying means, the following Yankee dryer The diameter is smaller than that of a typical Yankee dryer. be able to. Such diameter reductions result in total tissue manufacturing equipment In addition to reducing the height of the body, it also makes it easier to transport the conventional large-diameter Yankee dryer to the installation location. It also avoids the essential problems that arise during the process.

Therefore, a first object of the present invention is to overcome the aforementioned drawbacks of conventional tissue making machines. , Ti Nosh manufacture makes an important and non-trivial contribution to tissue manufacturing technology. The purpose is to provide equipment.

It is an object of the present invention to operate at substantially higher speeds than existing tissue making machines. It is an object of the present invention to provide a tissue manufacturing apparatus that can perform the following steps.

Another object of the present invention is to eliminate the need for a press part. The objective is to provide manufacturing equipment.

Another object of the invention is that the diameter of the Yankee dryer is To provide a tissue manufacturing apparatus that is substantially smaller in diameter than a Yankee dryer. That is.

Other objects and advantages of the invention will be apparent from the following detailed description in conjunction with the accompanying drawings. will be readily apparent to those skilled in the art.

Light quality Φ disclosure The present invention relates to a tissue manufacturing apparatus and method for manufacturing tissue from paper stock. . The apparatus has a former that forms a wet tissue web from the stock.

Air drying means is placed immediately downstream of the former to dry the wet Tison Yu web. be placed. A Yankee dryer is downstream of the drying means to complete drying of the tissue. will be placed in

In one embodiment of the invention, the former includes first and second loop-forming wires. have a These forming wires cooperate to have first and second ends therebetween. The formed part is formed by the following steps.

A gutter box is located immediately adjacent to the first end of the forming section for discharging the stock from the first end into the forming section. placed nearby.

The former also includes a first forming wire during penetration of the second forming wire through the forming portion. a second forming wire such that the second forming wire is disposed between the roller and the forming roll; It has cooperating forming rolls. The forming roll is preferably an open roll. be.

The headbox suppresses the turbulence of the stock while it passes through the doposox. There are multiple drag elements for this purpose.

The tissue making apparatus also transfers the wet tissue from the second forming wire to the air drying means. It has transport means for transporting the web.

In particular, this transfer means includes a looped transfer felt and a loop for guiding the transfer felt. and a plurality of guide rolls disposed within the looped transfer felt. multiple moths The idle roll has a transfer felt placed between the second forming wire and the suction roll. As such, it has a suction roll located in close proximity to the second forming wire. @L pull When the wire is connected to a partial vacuum source, the wet tissue web is removed from the second forming wire. It is adapted to be transferred to a transfer felt. Wet tissue web is transferred between the conveyor belt and the air drying means so that the wet tissue web is The downstream guide roll is placed in close proximity to the air drying means so that the It is placed in a large area.

The air drying means moves the wet tissue web between the former and the Yankee dryer. It has a looped dryer felt to support it. Multiple support rolls Disposed within the looped dryer felt to support the ear felt. those The support rolls to which the dryer felt transports the wet tissue web are and are arranged so as to form an upwardly arcuate surface. The heated air impingement means A wet tissue web supported by a layered felt collides with the arcuate surface. cooperating with an arcuate surface to be disposed between the steps; Air collision means is high pressure heated air When connected to a source, such air is used as a dryer to dry the tissue web. It is adapted to be blown through the belt onto the wet tissue web.

Furthermore, the air drying means comprises vacuum means arranged close to the arcuate surface. the The vacuum means is located on the opposite side of the dryer felt to the air impingement means and When the means is connected to a source of partial vacuum, air is passed through the wet tissue web from the air impingement means. This increases the flow of heated air through the dryer felt.

Loop dryer felts are manufactured from materials that can withstand high temperatures. Also, heating air The protrusion means are arranged above the arcuate surface and the air drying means remove the waste paper in case of web breakage. Lift the air impingement means from the arcuate surface in order to remove and remove the and a lifting means connected to the air impingement means.

In embodiments of the invention, the high pressure heated air source is at a temperature of 500 to 800 degrees Fahrenheit, particularly , supplying air at a temperature of approximately 700°F. As a result, although the web is dried A degree of dryness of 45-90% is obtained depending on the type. Such dryness requires air drying means. obtained while the web passes through.

In particular, the air drying means is used to dry the wet tissue web during its passage therethrough. dry tissue web from 25-35% solids level to 45-90% solids Dry until level dry.

A partial vacuum source connected to a vacuum means has a vacuum level of 0.5 to 2 inches of water column (WC). exists.

In another embodiment of the invention, the transfer means is configured to remove the wet tip from the second wire. It has suction means cooperating with the second wire to pick up the shweb.

This suction means is used to transfer the wet tissue web directly to the air drying means. It works together with the drying means.

This air drying means also allows the wet Tinnon web to be a pink-up tube placed in close proximity to the suction means, wet tip when the pick unroll is connected to a partial vacuum source. The shweb is separated from the suction means by the wet tissue web and pick-and-plow. is attracted to the loop-shaped dryer felt placed between the

The tissue making equipment also transfers the web from air drying means to Yankee dryer. It has a transport heald for transporting.

The Yankee dryer uses a pressurized steel inside to complete the drying of the tissue web. It has a rotating cylinder connected to a beam source. The air cap means is used together with the cylinder. work The air camping means surrounds and is supported by the cylinder. Pressurized heated air flows from the air cap toward the tissue web , connected to a source of pressurized heated air. The tissue web has one side that is cylindrical. designed to be heated by direct surface contact It is assembled. The other side of the web also shows how the tissue web moves around the cylinder. Pressurized heated air flows from the air cap means towards the tissue web during movement. heated by.

Many variations and modifications of this invention will be apparent from the following detailed description, which is set forth in conjunction with the accompanying drawings. will be readily apparent to those skilled in the art.

However, such modifications and changes do not go beyond the spirit of the invention, which is limited to the scope of the claims. Included within the scope.

Diagram: Ascaris solid monohydric theory FIG. 1 is a side view of the tissue manufacturing apparatus of the present invention.

FIG. 2 is an enlarged view of the apparatus shown in FIG.

FIG. 3 is an enlarged view of the transport means shown in FIG.

FIG. 4 is an enlarged view of the air drying means shown in FIG.

FIG. 5 is a side view similar to FIG. 1, but showing another embodiment of the invention. If the web is transferred directly from the forming section to the drying means without the need for a transfer felt. sent.

FIG. 6 is an enlarged view of FIG. This shows the means of transportation.

FIG. 7 is an enlarged view of the Yankee dryer shown in FIG. 1.

The same reference numerals refer to the same parts throughout the various embodiments of the invention.

Concave dish Ω details Toga friend theory FIG. 1 is a side view of a tissue manufacturing apparatus 10 for manufacturing tissue T from paper stock S. Ru. This device IO is a former for forming a wet tissue web W from a paper stock S. It has 12.

The air drying means 14 is located immediately downstream of the former 12, with a press between them. No intervening parts. The air drying means 14 dries the wet tissue web W. Ru.

The Yankee dryer 16 is installed downstream of the drying means to complete drying of the tissue W. Placed.

FIG. 2 is an enlarged view of the former 12 shown in FIG. Former 12 is the first and a second loop-forming wire 18.20, which wires cooperate. forming a forming portion 22 therebetween, the forming portion 22 having a first end 24 and a second end 2. It has 6.

A head box 28 is located in close proximity to the first end 24 of the forming section 22 and stores the stock S. It discharges into the formation 22 through its first end 24 .

The former 12 has a forming roll 30, and this forming roll 30 has a second forming wire. While the wire 20 passes through the forming section 22, its second forming wire 20 passes through the forming section 22. cooperating with the second forming wire 20 to be disposed between the ear 18 and the forming roll 30; do. As shown in FIG. 2, the forming roll 30 is an open roll.

The head box 28 prevents the turbulence of the stock S while it passes through the head box. In order to suppress this, a plurality of drag elements 32, 33, and 34 are provided.

FIG. 3 is an enlarged view of the transfer means 36 shown in FIG. The transport means 36 is shown in dotted lines. , the wet tissue web W is transferred from the second forming wire 20 to the air drying means 14. do.

In particular, the transfer means 36 includes a loop-type transfer felt 38 and a transfer felt 38. a plurality of guide rolls 40 disposed within the looped transfer felt 38 to 4L42.43.

The plurality of guide rolls 40 to 43 include a suction roll 40, and this suction roll 40 , a transfer felt 3 days is placed between the second forming wire 20 and the suction roll 40 It is arranged in close proximity to the second forming wire 20 as shown in FIG. As a result, the suction roll 40 is connected to a partial vacuum source 44, the wet tissue web W is exposed to the second forming wire. from the layer 20 to a transfer felt 38.

Since the downstream guide roll 41 is located very close to the air drying means 14, The wet tissue web W is arranged between the transfer felt 38 and the air drying means 14. and the web is transferred from the transfer felt 38 to the air drying means 14. ing.

FIG. 4 is an enlarged view of the air drying means 14 shown in FIG. The air drying means 14 is In order to support the wet tissue web W between the printer 12 and the Yankee dryer 16, It has a loop type dryer felt 46 for the purpose. Support the dryer felt 46 In order to do this, a plurality of support rolls 48, 49 are provided within the loop-type dryer felt 46. ,50.51,52,53.54,55゜56゜57,58,59,60,61 , 62, 63, 64, 65, 66.67.68.69 are arranged. Support The rolls 48-69 are provided with a dry web so that the wet tissue web is transferred thereon. Yafert 46 is arranged to form an upwardly arcuate surface 70.

The wet tissue web W supported by the dryer felt 46 is air-impinged. Air impingement means 72 cooperate with arcuate surface 70 to be disposed between steps 72 . workman When the a collision means 72 is connected to the high pressure heated air 'a74, the arrow ? 6,77.78 The air shown in is blown onto the wet tissue web W, 6 to dry the tissue web W.

Furthermore, as shown in FIG. 4, the air drying means 14 is located near the arcuate surface 70. It has a vacuum means 80. The vacuum means 80 is dry when viewed from the air collision means 72. Located on the opposite side of Yafelt 46, vacuum means 80 is connected to partial vacuum source 82. Once connected to the dryer felt 46, it passes through the wet tissue web W and through the dryer felt 46. As a result, the heated air flow 76-78 from the air impingement means 72 is enhanced.

The vacuum means 80 has a box-like arrangement that surrounds most of the surface of the support roll. vacuum The box protrudes at least a portion of the peripheral surface of the support roll to support the dryer felt. There is a slot in the cross-machine direction that allows the The vacuum box also has multiple orifices. The orifice passes the vacuum from the heated air impingement means 72 through the web W. Means 80 allows air to flow through the hair.

The looped dryer felt 46 is made of a material that can withstand high temperatures.

The heated air impingement means are arranged above the arcuate surface 70 and the air drying means 14 further include: It has lifting means 84. This lift means 84 removes waste paper from there when the web breaks. The air impingement means 72 is lifted from the arcuate surface 70 to facilitate removal. is connected to air collision means 72.

The high pressure heated air fA74 is applied to the web while the web passes through the air drying means 14. at a temperature within the range of 500 to 800 degrees Fahrenheit to obtain dryness within 45 to 90%. Supply pressurized air 76-7 days.

In particular, the air drying means 14 allows the wet tinshu nib W to pass through the air drying means 14. While drying, the wet tissue web W is reduced from 25 to 35% dry solids level to 45 to 45%. Dry to a solids level of 90% dry.

A partial vacuum connected to vacuum means 80, se2, is 0.5 to 2 inches water column (WC). There is a vacuum level.

FIG. 5 shows another embodiment of the invention. In this embodiment, the transport means 36 A transports the web WA from the second forming wire 2OA of the former 12A to the air drying means 1. 4A dryer felt 46A.

FIG. 6 is an enlarged view of the transfer means 36A shown in FIG. The transfer means 36A is a second forming unit. A second forming machine is used to pick up wet tinny web A from ear 2OA. It has a suction means 40A cooperating with the ear 20A. The suction means 40A is The air drying means 1 transfers the dish web WA directly onto the air drying means 14A. Work together with 4A.

In particular, the air drying means 14A is configured to dry the wet tissue web with the former 12A. A loop-shaped dryer felt 46A is installed to support it between the key dryer 16A. have

To support the dryer felt 46A, its looped dryer felt) 46 A plurality of support rolls are arranged in A, and these support rolls are dryer fells) 46A arcs upwardly over surface 70A to deliver wet tissue-A thereon. arranged to form a

The plurality of support rolls are arranged in the vicinity of the suction means 40A. Since the wet tissue web-A has a sample roll 86, the wet tissue web-A is connected to the suction means 40A and the pin. As a result, the pickup roll 86 When connected to the partial vacuum source 88, the moistened tino-sol web A is connected to the suction means 40A. , it was placed between the wet Tino Shuwepu^ and the pickup roll 86. It is attracted to the looped dryer felt 46A.

FIG. 7 shows a transfer stage for transferring the web W from the air drying means 14 to the Yankee dryer 16. route 90 is shown.

As shown in FIG. 7, the Yankee dryer 16 has completed drying the tissue web W. It has a rotating cylinder 92 internally connected to a source of pressurized steam 94 for the purpose of providing steam.

Air cap means 96 cooperate with cylinder 92. The air cap means 96 is pressurized. It is connected to a heated air source 98 so that pressurized heated air is supplied as indicated by arrow 100. , from the air cap means 96, supported by the cylinder 92 and of the cylinder 92. It flows toward the tissue web W running around it. Tissue Web W is The entire direct contact surface of the tinnyu web W supported by the cylinder 92, i.e. One side of the web is heated while the other side of the web is heated from the air cap means 96 to the cylinder. Pressurized heated air 10 flows towards the tin-yu web while moving around 92 heated by 0.

During operation of the device, the method comprises: l) discharging the stock onto the forming wire of the former; and 2) 1) so that the dryer felt forms an upwardly arched surface. Formation of wet tissue onto dry felt supported by multiple rolls The wet tissue web is transferred through a press operation. The former is immediately transferred to the dryer felt without any intervention, and ), the web is supported on an arcuate surface so that the web obtains a skeletal dryness of up to 90%. 4) to complete the drying of the web; The process includes the step of transferring the web from the dryer felt to the Yankee dryer. Yankee dryers flow air through the cylindrical walls of the Yankee dryer. To complete drying of a web without drying. This configuration is a once-through air dryer. Nissl enables the use of even higher thermal energy.

Therefore, the present invention greatly increases the speed of tissue production. Because Yankee Equipped with a conventional textile manufacturing machine equipped with a curved dryer device before the dryer. As in the case, the web is placed on the arcuate surface of the drying means without the need to change the direction of the web. This is because it is gradually dried while being sent to the surface.

Additionally, due to the efficiency of its air drying means, Yankee dryers should be of minimum diameter. can be carried out, and the drying operation can be completed effectively.

The invention also eliminates the need for costly presses.

FIG.7 Return to self / 7-I son-in-law H day November 11, 1994

Claims (1)

[Claims] 1. Former (12) that forms a wet tissue web (W) from paper stock (S) and; the former (12) for drying the wet tissue web (W). air drying means (14) located immediately downstream of; A Yankee dryer (16) disposed downstream of the drying means (14) ) for producing tissue (T) from paper stock (10 ). 2. The former (12) is: a forming portion (22) having first and second ends (24, 26) cooperating therebetween; forming first and second loop-shaped forming wires (18, 20); said first end (24); ) to discharge the stock (S) into the forming section (22). a head box (28) disposed proximate said first end (24) of the head box (28); A tissue manufacturing device (10) according to claim 1, wherein the tissue manufacturing device (10) comprises: 3. The former (12) further includes: the second forming wire (20) While passing through the section (22), the second forming wire (20) passes through the first forming wire ( 18) and the forming roll (30). Tissue according to claim 2, having a forming roll (30) cooperating with Manufacturing equipment (10). 4. The method according to claim 3, wherein the forming roll (30) is an open roll. dish manufacturing device (10). 5. The head box (28): turbulence of the stock (S) while it passes through said headbox (28); Claims comprising a plurality of drag elements (32-34) for suppressing 2. The tissue manufacturing apparatus (10) according to 2. 6. The wet tissue web (W) is transferred from the second forming wire (20) to the The claimed invention further comprises transport means (36) for transporting the drying means (14) to the drying means (14). A tissue manufacturing device (10) according to scope 2. 7. The transport means (36): a looped transfer felt (38); within said looped transfer felt (38) for guiding said transfer felt (38). a plurality of guide rolls (40 to 43) arranged in; 40 to 43), the transfer felt (38) is suctioned with the second forming wire (20). immediately above said second forming wire (20) so as to be disposed between it and the pulling roll (40). a suction roll (40) disposed proximately, so that said suction roll (40) is connected to a partial vacuum source (44), said wet tissue web (W) ) is transferred from the forming wire (20) to the transfer felt (38); A wet tissue web (W) is attached to the transfer felt (38) and the air drying means (1). 4), the wet tissue web (W) is placed between the transfer felt ( 38) to the air drying means (14). 4) and a downstream guide roll (41) located in close proximity to the claimed A tissue manufacturing device (10) according to scope 6. ．． 8. The air drying means (14): The wet tee is connected between the former (12) and the Yankee dryer (16). a loop-shaped dryer felt (46) supporting the bush web (W); within said looped dryer felt (46) to support the ear felt (46). a plurality of support rolls (48 to 69) disposed in the dryer felt; (46) arc upwardly to transfer said wet tissue web (W) thereto. support rolls (48-69) arranged to form a surface (70); The wet tissue (W) supported by the dryer felt (46) the said arcuate surface (70) and the air impingement means (72); heated air impingement means (72) cooperating with the arcuate surface (70); When the impingement means (72) is connected to a source of high pressure heated air (74), the air is To the wet tissue web (W) to dry the moist tissue web (W) Claim adapted to be blown through said dryer felt (46) The tissue manufacturing device (10) according to scope 1. 9. Said air drying means (14) further: is arranged near said arcuate surface (70). and a vacuum means (80) which is connected to the air impingement means (7). 2) located on the opposite side of the dryer felt (46) when viewed from the When the air means (80) is connected to a partial vacuum source (82), said air impingement means (72) ) through the wet tissue web (W) and the dryer felt (46). the claimed invention, wherein the flow of heated air (76-78) flowing through it is enhanced; The tissue manufacturing apparatus (10) according to scope 8. 10. The looped dryer felt (46) is made of a material that can withstand high temperatures. A tissue manufacturing device (10) according to claim 8, which is manufactured by. 11. said heated air impingement means (72) being arranged on said arcuate surface (70); The air drying means (14) further includes a lift connected to said air impingement means (72). means (84), the lifting means (84) removing waste paper from the web upon breakage; the air impingement means (72) from the arcuate surface (70) to facilitate removal of the air impingement means (72) from the arcuate surface (70); The tissue manufacturing device (10) according to claim 8, wherein the tissue manufacturing device (10) is adapted to be raised. 12. While the web passes through the air drying means (14), the web is 45-90% The high pressure heated air source (74) operates at a temperature of 500 to 800 degrees Fahrenheit to obtain a degree of dryness of The tee according to claim 8, wherein the pressurized air (76 to 78) is supplied at a constant temperature. ash manufacturing device (10). 13. The air drying means (14) is configured to dry the wet tissue web (W) with the air drying means (14). While passing through the drying means (14), the wet tissue web (W) is % solids dryness level to 45-90% solids dryness level. Additionally, a tissue manufacturing apparatus (10) according to claim 1. 14. The partial vacuum source (82) connected to the vacuum means (80) has a vacuum of 0.5 to 2 Tissue production according to claim 9, wherein the vacuum level is inches of water column (WC). Apparatus (10). 15. The transfer means (36A): Pick the wet tissue web (WA) from the second forming wire (20A) a suction means (40A) cooperating with said second forming wire (20A) to The suction means (40A) cooperates with the air drying means (14A) to remove the moisture. Transferring the wet tissue web (WA) directly to the air drying means (14A), The tissue manufacturing apparatus (10) according to claim 6. 16. The air drying means (14A): A loop supported between the former (12A) and the Yankee dryer (16A). a loop-shaped dryer felt (46A); supporting the dryer felt (46A); In order to the support roll is such that the dryer felt (46A) is An upwardly arcuate surface (70A) for transferring the tissue web (WA) onto it. ); the plurality of support rolls are arranged to form a wet tip; A shovel web is disposed between the suction means (40A) and the pickup roll (86). A pick-up roll (86 ), whose pickup roll (86) is connected to a partial vacuum source (88). Then, the wet tissue web (WA) is separated from the suction means (40A). Then, the wet tissue web (WA) is connected to the pickup roll (86). is drawn onto the looped dryer felt (46A) disposed between A tissue manufacturing device (10) according to claim 15, wherein the tissue manufacturing device (10) is configured to: 17. The web (W) is transferred from the air drying means (14) to the Yankee dryer. The tee according to claim 1, further comprising a transfer belt (90) for transporting the ash manufacturing device (10). 18. The Yankee dryer (16): completes drying of the tissue web. a rotating cylinder (92) internally connected to a source of pressurized steam to air cap means (96) cooperating with said cylinder (92); Cap means (96) connects the air cap means (96) to the cylinder (9). 2) towards the tissue web (W) that is supported by and runs around it. It is connected to a pressurized heated air source (98) so that pressurized heated air flows, and The tissue web has one side thereof supported by the cylinder (92). The entire direct contact surface of the bush web (W) is heated, and the other side is While the tissue web (W) moves around the cylinder (92), the The pressure flowing from the capping means (96) toward the tissue web (W) The tee according to claim 1, which is heated by pressurized heating air (100). ash manufacturing device (10). 19. discharging the stock (S) onto the forming wire of the former (12); a plurality of ear felts (46) forming an upwardly arcuate surface (70); Wet tissue formed onto dry felt (46) supported by rolls The process of transferring the web (W) and the web of wet tissue requires a press operation. from the former (12) to the dryer felt (46) without intervening between them. directly transferred; arcuate table so that the web (W) obtains a skeletal dryness of up to 90% blowing heated air through the web supported on the surface (70); To complete the drying of (W), remove the web from the dryer felt (46). and a step of transferring to the key dryer (16), and the Yankee dryer (16) without flowing air through the cylindrical wall of the Yankee dryer (16). The drying of the web is completed, and its arrangement uses more heat energy than a type of dryer that allows air to pass through. high bulk from paper stock (S), making it possible to effectively utilize energy Manufacture tissue. How to do it.