CN105780577B - Wet moulding device and method - Google Patents
Wet moulding device and method Download PDFInfo
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- CN105780577B CN105780577B CN201610157021.3A CN201610157021A CN105780577B CN 105780577 B CN105780577 B CN 105780577B CN 201610157021 A CN201610157021 A CN 201610157021A CN 105780577 B CN105780577 B CN 105780577B
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- baffle
- forming net
- pulp
- forming
- baffles
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/06—Regulating pulp flow
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Abstract
The invention discloses a kind of wet moulding device, it is equipped in the device into slurry region or forming area.It is described into being equipped with several block baffles in slurry region or forming area, the baffle for changing pulp-water mixture flow direction.The present invention also provides a kind of methods improving non-woven fabrics transverse strength simultaneously.It is described into several block baffles are equipped in slurry region or forming area, the baffle makes component of the velocity vector by the pulp-water mixture of baffle in the dimension perpendicular to forming net moving direction be more than 0 for changing the flow direction of pulp-water mixture.The present invention in wet moulding device by, into several block baffles are arranged in slurry region or forming area, changing the flow direction of pulp-water mixture, increasing the ratio of transverse fiber in the wet pulp layer being attached on forming net.Finally formed non-woven fabrics transverse strength is set to greatly improve.
Description
Technical field
The invention belongs to wet nonwoven fabrics apparatus field more particularly to wet moulding device and methods.
Background technology
Existing wet moulding device has cylinder, fourdrinier wire, inclined wire etc., and the main mixing liquid for using fiber and water passes through into
Type device is dehydrated to form l Water Paper page.In the l Water Paper page of formation, determine the main performance index of paper quality be exactly shaping speed,
The uniformity, vertically and horizontally tensile strength index.According to the requirement of various paper, need to select different formers to use production to need
It asks.In numerous formers, it is to be most difficult to solve the problems, such as to improve paper vertical transverse strength.Currently, the method used is to allow fibre
Dimension is laterally distributed in as far as possible on molding wire side.In order to realize that the technique effect, forming device for cylinder machine use lateral flow type cloth slurry side
Method, fourdrinier wire use shaking table.Inclined wire uses the method that slurry speed is more than network speed.But generally speaking, increase transverse strength
While, or the prior art can influence shaping speed or can influence the uniformity of paper.In numerous formers, tiltedly
Net former is a kind of ideal former.It, which can be integrated, takes shaping speed, the uniformity and pulling force ratio in length and breadth into account, but only
Transverse strength can not be inherently greatly improved by inclined-wire form.Up to the present, vertically and horizontally pulling force ratio is unable to reach or connects
Nearly 1:1, which greatly limits its applications.
Invention content
It is an object of the invention to solve problems of the prior art, and a kind of wet moulding device is provided, to carry
The transverse strength of high non-woven fabrics.
In order to achieve the above-mentioned object of the invention, used technical solution is as follows：
It is equipped in wet moulding device into slurry region or forming area, if described into being equipped in slurry region or forming area
Dry block baffle, the baffle make the flow velocity of the pulp-water mixture by baffle for changing the flow direction of pulp-water mixture
Component of the vector in the dimension perpendicular to forming net moving direction is more than 0.
Wet moulding device can be forming device for cylinder machine, fourdrinier forming device, slope screen former etc..
It is heretofore described to refer to pulp-water mixed liquor into slurry region and enter forming area or be directly injected to before forming net
The region at place, such as the head box outlet in fourdrinier forming device and slope screen former.
Heretofore described forming area refers to the region for making pulp-water mixed liquor settle above forming net.
The principle of the device is the flow direction before being settled down to forming net using baffle change pulp-water mixture, since pulp-water is mixed
It closes and contains a large amount of long fibre in object, and the form of fiber in a liquid usually extends along flow direction.Therefore, when pulp-water is mixed
When closing the flow direction change of object, certain angle can be presented in the direction of motion of forming net by being settled down to the fiber of forming net, be formed laterally
Fiber.And in the region of not baffle, pulp-water mixture would generally be moved along the moving direction of forming net, therefore its fiber
Form is also usually distributed along forming net moving direction, forms longitudinal fiber.Therefore, after baffle is set, in final wet pulp layer
Transverse fiber and longitudinal fiber exist, this enables the ratio of pulling force in length and breadth of finally formed non-woven fabrics or paper layer to realize big model
It encloses adjustable.
The wet moulding device effect that above-mentioned improvement can apply preferably mainly has two kinds of fourdrinier wire, inclined wire.
Second object of the present invention is to provide a kind of inclined-wire form device.Forming net is equipped in inclined-wire form device,
It is forming area above forming net.Equipped with several pieces of flow directions for changing pulp-water mixture in the forming area
Baffle, the baffle is not contacted with forming net and vertical or approximately perpendicular to horizontal plane, the plane where baffle and forming net
Moving direction is not parallel.
The inclined-wire form device can realize above-mentioned pulling force in length and breadth than regulating effect, and can integrate and take molding speed into account
Degree, the uniformity.Certainly, those skilled in the art are in certain angle it is to be understood that even if baffle is not exclusively vertical with horizontal plane
Degree can also realize the present invention's as long as the flow direction of final pulp-water mixture carries the component vertical with forming net moving direction
Purpose belongs in the scope of the present invention.
As a preferred embodiment, the baffle has rotary freedom in the horizontal direction.Baffle can be with water (flow) direction
It at an angle, can also be completely vertical.But angle adjustment has to take the influence to flow shape into account, cannot be on forming net
Sediment form excessive disturbance, prevent from having an impact the uniformity of final finished.Baffle with rotary freedom,
It needs change properties of product to make, easily the form and ratio of transverse fiber in final finished can be adjusted.
Preferably as second, which is characterized in that the baffle can move up and down in vertical direction.Baffle bottom with
The distance of forming net determines the speed of flow at this, therefore by adjusting its distance, can control the uniformity of final finished.
Preferably as the third, baffle distribution in a row-shaped, number of rows are a row or multi-row, and every baffles form is consistent
And the moving direction of orientation and forming net is perpendicular.The form of different baffles is consistent in i.e. every baffles, and baffle row
It arranges to vertical with forming net.As shown in figure 3,4 longitudinal block baffles are 1 row, forming net moving direction is from right to left.Often row with
Monolithic baffle is compared, and regular row pattern baffle can more effectively control flow shape, and the performances such as the wet pulp layer uniformity is made to obtain
It is promoted.And the number of rows of baffle can be used for influencing the ratio and finished product thickness of the transverse fiber of final wet pulp layer.
Being further improved for the preferred embodiment is, when the number of rows of baffle is multiple rows of, the water conservancy diversion direction of adjacent two baffles
It is opposite in the dimension perpendicular to forming net moving direction.As a result, in final wet pulp layer, transverse fiber will present multi-angle
Interleaved state makes its transverse strength further get a promotion.
Third object of the present invention is to provide a kind of plain net molding machine.It is exported in the head box of plain net molding machine
Or near exit is equipped with the baffle of several pieces of flow directions for changing pulp-water mixture, baffle is vertical or approximately perpendicular to water
Plane and water conservancy diversion direction and forming net moving direction are not parallel.It is straight since plain net molding machine does not have direct shaping area
It is connected in the exit passageway of its head box or the region behind slurries outflow outlet and baffle is set, it is made to fall within the fiber on forming net
Form changes.
Fourth object of the present invention is to provide a kind of method improving non-woven fabrics transverse strength.This method is specially again
It is described into being equipped with several block baffles in slurry region or forming area, the baffle for changing pulp-water mixture flowing side
To, so that component of the velocity vector by the pulp-water mixture of baffle in the dimension perpendicular to forming net moving direction is more than 0,
To increase the ratio of transverse fiber in the wet pulp layer being attached on forming net.
In the present invention transverse fiber refer in wet pulp layer, with forming net moving direction at an angle even completely it is vertical
Fiber.
Beneficial effects of the present invention be by wet moulding device into slurry region or forming area in be arranged several pieces
Baffle changes the flow direction of pulp-water mixture, increases the ratio of transverse fiber in the wet pulp layer being attached on forming net.Make
Finally formed non-woven fabrics transverse strength greatly improves.
Description of the drawings
Fig. 1 is the structural schematic diagram of traditional inclined-wire form device；
Fig. 2 is the structural schematic diagram for the inclined-wire form device that the present invention increases after baffle；
Fig. 3 is baffle plate setting schematic diagram in the shaping area of inclined-wire form device；
In figure：Later roller 1, deflector roll 2, breast roll 3, forming net 4, dewatering box 5, stock inlet 6, partition board 7 and baffle 8.
Specific implementation mode
The present invention is further elaborated and is illustrated with reference to the accompanying drawings and examples.Each embodiment in the present invention
Technical characteristic can carry out the corresponding combination under the premise of not conflicting with each other.
Embodiment 1
Fig. 1 show a kind of inclined-wire form device, and main body is by later roller 1, several deflector rolls 2, breast roll 3 and forming net
4 are surrounded, and forming net 4 is rotated by its drive.4 top of forming net is equipped with shaping area, shaping area week between breast roll 3 and later roller 1
While being sealed by partition board 7.7 lower section of partition board of wherein side offers stock inlet 6 at forming net 4.Certain density slurry
Aqueous mixtures are discharged into shaping area from stock inlet 6.Pulp-water mixture in shaping area under the drive of forming net 4, from breast roll 3 to returning
It is flowed at head roller 1.
As shown in Figures 2 and 3, be equipped in forming area several baffles 8 per baffles 8 forms consistent and orientation at
The moving direction of type net 4 is perpendicular.The water conservancy diversion direction of adjacent two baffles 8 is in the dimension perpendicular to 4 moving direction of forming net
On the contrary.8 bottom of baffle does not contact with forming net 4 and is arranged perpendicular to horizontal plane, and top stretches out shaping area and is conveniently adjusted direction.Gear
Plate 8 has rotary freedom in the horizontal direction.Its realization method makes hingedly and in fixing axle, to make the side long side of baffle 8
It can be rotated.Baffle 8 can also move up and down in vertical direction, can be fixed when being moved to certain altitude.When for
When changing the flow direction of pulp-water mixture, baffle 8 can be adjusted to the plane and forming net 4 moving direction injustice to where it
Row, makes component of the velocity vector by the pulp-water mixture of baffle 8 in the dimension perpendicular to 4 moving direction of forming net be more than
0.Therefore, the long fibre carried in fluid also accordingly turns to, when it is settled down to bottom forming net 4 under the effect of gravity, just shape
At transverse fiber.And by adjusting 8 baffle number of rows of baffle, height and angle, it can be achieved that the adjustment of final wet pulp layer performance.
Below based on the device in the present embodiment, non-woven fabrics molded test is carried out, while being arranged common group of control.
In the present embodiment and following embodiments, the difference of comparative example and embodiment is to be not provided with baffle 8, but remaining structure and technique
It is identical as embodiment device.
It is in the present embodiment, baffle 8 is so-called in the projection of horizontal plane in the projection of horizontal plane and 4 moving direction of forming net
Angle is known as the angle of baffle 8 and forming net 4, similarly hereinafter.
Non-woven fabrics moulding process is as follows：Select 70% wood pulp cellulose, length 2.5mm, 30% viscose glue chopped strand, length is
10mm, a concentration of 3/10000ths, speed is 100 ms/min, fiber networking grammes per square metre 60g/ ㎡.
Baffle is with forming net at 45 degree in the present embodiment device, and bottom is 1 centimeter with forming net distance, the product produced
Parameter is compared as follows：
Note：It is " wet " in table to represent the wet pulp layer being prepared；" dry " represents the finished product non-woven fabrics formed after the drying of wet pulp layer,
Similarly hereinafter.
Embodiment 2
The device and technique continued in embodiment 1 is tested, and only adjusts in direction formed by baffle and forming net to 30
Degree, remaining production technology index are constant.Product parameters are compared as follows：
Embodiment 3
The device and technique continued in embodiment 1 is tested, and is only adjusted baffle at a distance from forming net to 3 centimeters,
Remaining production technology index is constant.Product parameters are compared as follows：
Embodiment 4
The device and technique continued in embodiment 1 is tested, and only adjusts in direction formed by baffle and forming net to 30
Degree, is arranged double baffle, remaining production technology index is constant.Product parameters are compared as follows：
Embodiment 5
The device continued in embodiment 1 is tested, while non-woven fabrics moulding process is as follows：70% wood pulp cellulose is selected,
Length 2.5mm, 30% viscose glue chopped strand, length 10mm, a concentration of 3/10000ths, 100 ms/min of speed, fiber at
Net grammes per square metre 60g/ ㎡ baffles and forming net at 45 degree angles, highly 2 centimeters, compared with comparative example product the whole picture property spent parameter as
Under：
Embodiment 6
In the present embodiment, above-mentioned baffle increases in the head box outlet of plain net molding machine or near exit.Baffle is vertical
Or it is not parallel approximately perpendicular to horizontal plane and water conservancy diversion direction and forming net moving direction.Since plain net molding machine is not direct
Shaping area, therefore baffle is set in the region directly after the exit passageway of its head box or slurries outflow outlet, so that it is fallen within
Fibre morphology on forming net changes.Its effect that can be realized and above-mentioned inclined-wire form device are essentially identical, therefore no longer
It repeats technique and compares effect.
In above-described embodiment, the method for the raising non-woven fabrics transverse strength of core is exactly into slurry region or forming area
Equipped with several block baffles, for changing the flow direction of pulp-water mixture, make the velocity vector of the pulp-water mixture by baffle
Component in the dimension perpendicular to forming net moving direction is more than 0, to increase in the wet pulp layer being attached on forming net laterally
The ratio of fiber.But above-mentioned embodiment is only a preferred solution of the present invention, so it is not to limit this hair
Bright, all technical solutions for taking the mode of equivalent substitution or equivalent transformation to be obtained are all fallen in protection scope of the present invention.
Claims (3)
1. a kind of inclined-wire form device, it is equipped with forming net in inclined-wire form device, is forming area above forming net, feature exists
In equipped with several block baffles in the forming area, baffle distribution in a row-shaped, number of rows is multiple rows of；In per baffles
There is polylith baffle, every baffles form is consistent and the moving direction of orientation and forming net is perpendicular；Adjacent two baffles
Water conservancy diversion direction is opposite in the dimension perpendicular to forming net moving direction；And has between the adjacent screen in same baffles and supply
The channel of pulp-water mixture flow warp, pulp-water mixture change flow direction during flowing through the channel by baffle；Described
Baffle does not contact and vertical or approximately perpendicular to horizontal plane with forming net, and the plane and forming net moving direction where baffle are uneven
Row.
2. inclined-wire form device as described in claim 1, which is characterized in that the baffle has rotation in the horizontal direction
Degree of freedom.
3. inclined-wire form device as described in claim 1, which is characterized in that the baffle in vertical direction can on move down
It is dynamic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610157021.3A CN105780577B (en) | 2016-03-18 | 2016-03-18 | Wet moulding device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610157021.3A CN105780577B (en) | 2016-03-18 | 2016-03-18 | Wet moulding device and method |
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| Publication Number | Publication Date |
|---|---|
| CN105780577A CN105780577A (en) | 2016-07-20 |
| CN105780577B true CN105780577B (en) | 2018-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610157021.3A Active CN105780577B (en) | 2016-03-18 | 2016-03-18 | Wet moulding device and method |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527584Y (en) * | 2002-01-23 | 2002-12-25 | 杭州美辰纸业技术有限公司 | Wave shaped flow pass pulp flow box |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2827313B1 (en) * | 2001-07-10 | 2004-03-12 | Rieter Perfojet | NONWOVEN COMPRISING A CONTINUOUS FILAMENT TABLECLOTH, MANUFACTURING METHOD THEREOF AND APPLICATION THEREOF AS WIPING RAG |
| EP2199459A1 (en) * | 2008-12-16 | 2010-06-23 | Voith Patent GmbH | Sheet composition system for a machine for producing a multiple layer sheet of fibrous material |
| DE102009027079A1 (en) * | 2009-06-22 | 2010-12-23 | Voith Patent Gmbh | Headbox for a machine for producing a fibrous web |
| CN203021864U (en) * | 2012-12-26 | 2013-06-26 | 浙江尚德能源科技有限公司 | Dehydration device applicable to head box of inclined net paper machine |
| CN103590193B (en) * | 2013-11-11 | 2015-07-29 | 杭州创蓝无纺布有限公司 | Wet method spunlace non-woven cloth process units and technique thereof |
| CN205474567U (en) * | 2016-03-18 | 2016-08-17 | 杭州湿法无纺布设备有限公司 | Wet process forming device |
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2016
- 2016-03-18 CN CN201610157021.3A patent/CN105780577B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527584Y (en) * | 2002-01-23 | 2002-12-25 | 杭州美辰纸业技术有限公司 | Wave shaped flow pass pulp flow box |
Non-Patent Citations (1)
| Title |
|---|
| 成型器;张金美;《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》;20060415;13-23 * |
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