CN104368498B - Slot coating head cavity structure for fluid coating - Google Patents
Slot coating head cavity structure for fluid coating Download PDFInfo
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- CN104368498B CN104368498B CN201410744609.XA CN201410744609A CN104368498B CN 104368498 B CN104368498 B CN 104368498B CN 201410744609 A CN201410744609 A CN 201410744609A CN 104368498 B CN104368498 B CN 104368498B
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- fluid
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- coating
- die
- main chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
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Abstract
The invention discloses a slot coating head cavity structure for fluid coating. The slot coating head cavity structure comprises an upstream die, a downstream die and a gasket clamped between the upstream die and the downstream die, and the upstream die, the downstream die and the gasket are assembled to form a cavity composed of a fluid inlet, a main distribution cavity, a choked flow passage, an auxiliary pressure-stabilizing cavity, an extension flow passage and a fluid outlet. The main distribution cavity is of a V-shaped structure, and the length H3 of the choked flow passage decreases gradually from the center of a die head to the end of the die head. The auxiliary pressure-stabilizing cavity is of a half-drop structure. By optimal design of the internal cavity of an existing slot die coating head, pressure distribution of fluid in the process of flowing in the coating head cavity and flowability of the fluid in the cavity are optimized, and accordingly the problems of nonuniformity in coating during fluid coating and sedimentation of the fluid in the cavity are solved.
Description
Technical field
The present invention relates to the slot coated head cavity body structure to deposit fluid on foil and sheet material.
Background technology
The existing secondary chamber cross sectional shape to the slot coated head of deposit fluid on foil and sheet material as shown in figs. la and lb,
It is the structure of existing extrusion slot coated 2, be by downstream mold 21 and upstream mould 22 and to be clipped in downstream mold 21 and upstream mould 22
Between pad 23 with 17 assembling bolts 24 connect after and define by fluid inlet 221, distribution main chamber 222, choked flow runner
223rd, the cavity of the squash type slot coated head in voltage stabilizing pair chamber 224, expanded channel 225 and fluid issuing 226 composition.Deposit fluid
By with fluid inlet 221, coating head to fluid intake and then is entered with the pipeline threadeded.Slot coated 2 main
Shortcoming be:
As shown in figs. la and lb, distribution main chamber is exactly directly a semicolumn, and distribution main chamber 222 goes out to flow edge and hangs down for one
Straight in the straight line 227 of die head median plane, the cross sectional shape in voltage stabilizing pair chamber 224 is the semicircle of a sinking, this is designed without considering
To mobile performance in cavity for the fluid, rheological behavior and along main chamber convey when along stroke pressure loss, thus causing to exist
Following shortcoming:
There is the thin inhomogeneities defect in thick middle both sides in a, the coating being coated onto on foil or sheet material；
B, do not considered due to it fluid this kind of pair chamber in mobility, thus causing fluid in the secondary chamber pole of this kind of structure
Easily form sedimentation thus causing the unstability being coated with.
Squash type slot coated 2, in order to solve defect a first, adds differential bolt group 25 and carrys out regulated fluid outlet
Height h1, to solve the problems, such as defect a with this.But squash type slot coated 2 is during production and application, fluid intake
Speed, the change of fluid behaviour (such as viscosity, density and solid content) be required for the regulated quantity of different h1, thus causing
Produce the reduction of effective time, and then reduce the efficiency of production.In order to solve defect b, most effective during producing
Method be exactly that mobile performance according to slurry is cleared up to slit type coating head 2 with empirical statistics timing length, thus again
Reduce the efficiency of production.
Although existing slot coated head can be by the stability increasing lip adjusting means and increase fluid on market
To reduce the impact that the inborn defect of above coating head causes, but the product for the volume production of large-scale coating product for a long time
Quality is still a huge test.
Therefore, prior art existing defects, need to improve.
Content of the invention
The technical problem to be solved is: a kind of coating homogeneity of offer is good, fluid no sedimentation in cavity
Slot coated head cavity body structure.
Technical scheme is as follows: a kind of slot coated head cavity body structure for fluid coating, including upstream mould,
Downstream mold and be clipped in pad between upstream mould and downstream mold, upstream mould, downstream mold and pad have been assembled to form and have been entered by fluid
Mouth, distribution main chamber, choked flow runner, the cavity in voltage stabilizing pair chamber, expanded channel and fluid issuing composition；Distribution main chamber is set to V-shaped
Structure, length h3 of choked flow runner is successively decreased from the center of die head to die head end.
It is applied to technique scheme, in described slot coated head cavity body structure, distribution main chamber is set to the V-shaped in section
Structure.
It is applied to each technique scheme, in described slot coated head cavity body structure, distribution main chamber is set to section
The V-shaped structure of semicolumn.
It is applied to each technique scheme, in described slot coated head cavity body structure, the wall setting in voltage stabilizing pair chamber
For inclined-plane.
It is applied to each technique scheme, in described slot coated head cavity body structure, the section setting in voltage stabilizing pair chamber
For half water droplet structure.
It is applied to each technique scheme, in described slot coated head cavity body structure, the bevel angle of wall is θ 2,
Wherein, the span of θ 2: 2≤50 ° of 30 °≤θ.
It is applied to each technique scheme, in described slot coated head cavity body structure, V-shaped distributes the V-shaped angle of main chamber
Spend for 1≤180 ° of θ 1, wherein, the span of θ 1: 120 °≤θ.
It is applied to each technique scheme, in described slot coated head cavity body structure, the length of expanded channel is more than
The length of choked flow runner.
It is applied to each technique scheme, in described slot coated head cavity body structure, upstream mould, downstream mold and pad
Cavity is formed using mechanical assembly.
Using such scheme, by distribution main chamber is set to V-shaped structure, length h3 of choked flow runner is by die head for the present invention
Center successively decrease to die head end, voltage stabilizing pair chamber be set to half water droplet structure, thus optimization design existing slot die coating
Head internal cavity structure, optimize fluid flow in coating head cavity during pressure distribution and fluid in cavity
Mobility, thus solving the problems, such as that the inhomogeneities of the coating existing during fluid coating and fluid settle in cavity.
Brief description
Fig. 1 a is the structural representation of prior art；
Fig. 1 b is the cross section structure schematic diagram of prior art；
Fig. 2 is the coating thickness scattergram of existing coating head；
Fig. 3 is the structure principle chart of the present invention；
Fig. 4 a is the structural representation of the present invention；
Fig. 4 b is the cross section structure schematic diagram of the present invention；
Fig. 4 c is overlooking the structure diagram in the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Present embodiments provide a kind of slot coated head cavity body structure for fluid coating, general slot coated head cavity
Body structure is as shown in figure 3, slot coated 1 by upstream mould 12, downstream mold 11 and is clipped between upstream mould 12 and downstream mold 11
Pad 13 collectively constitute, and define the passage of deposit fluid, as shown in figure black region.Deposit fluid sequentially pass through into
Mouthfuls 121 reach distribution main chambers 122, are then assigned on the direction of paper by distribution main chamber 122, after again through choked flow slit
123 reach voltage stabilizing pair chamber 124, enter expanded channel 125, reach coating outlet after voltage stabilizing pair chamber 124 carries out pressure balance
After be coated onto on foil or sheet material 14, because foil or sheet material 14 are moved toward direction initialization with the speed of v, thus in foil
Or coating layer 15 is defined on sheet material 14.
The slot coated head cavity body structure of the fluid coating of the present embodiment as shown in Fig. 4 a, 4b and 4c, extrusion type coating head 3
Structure, be still and be made up of downstream mold 31 and upstream mould 32 and the pad 33 being clipped between downstream mold 31 and upstream mould 32, under
Between trip mould 31, upstream mould 32 and pad 33, cavity is formed by mechanical assembly, for example, assembled by 17 assembling bolts 34
Form cavity, formed after assembling by fluid inlet 321, distribution main chamber 322, choked flow runner 323, voltage stabilizing pair chamber 324, expanded channel
325 and fluid issuing 326 composition squash type slot coated head cavity.
Wherein, the effect of fluid intake is it is preferred that the shape of fluid intake is permissible for fluid hence into coating head
It is provided in round, be connected with the conveyance conduit of fluid by pipe screw thread；Distribution main chamber effect be deposit fluid is assigned to whole
It is preferred that distributing the V-shaped structure that could be arranged to section semicolumn of main chamber on individual coating width；The effect of choked flow runner is
Connect distribution main chamber and voltage stabilizing main chamber, and pressure accumulation in distribution main chamber is acted on by its choked flow and be conducive to fluid in distribution master
Intracavity is along the distribution in coating width direction；The effect in voltage stabilizing pair chamber is the flow velocity of the fluid being lowered into, and reduces fluid in distribution
In main chamber during distribution because the pressure that causes along stroke pressure loss is uneven it is preferred that voltage stabilizing pair chamber could be arranged to more favourable
The structure being half water droplet in the section of flow of fluid；The effect of expanded channel is with stable flow velocity, stable fluidised form, edge coating
The stable pressure change of width transports fluid into fluid outlet it is preferred that the length of expanded channel is more than choked flow stream
The length in road；Fluid issuing, fluid thus leaves coating head, is applied on foil or sheet material.
Wherein, deposit fluid to fluid intake and then enters painting with the pipeline threadeded by with fluid inlet 321
Leftover of bolt of cloth intracavity, deposit fluid is entered by the fluid inlet of coating head cavity after the devices such as pump provide power, sequentially passes through point
Join main chamber, choked flow runner, voltage stabilizing pair chamber and expanded channel, after fluid issuing, be then applied to foil and sheet material up.
And, in view of the rheological behavior of deposit fluid, the mobility of fluid and along during distribution main chamber conveying along journey
The pressure loss, distribution main chamber 322 is set to V-shaped, and as illustrated in fig. 4 c, the outlet edge 327 of distribution main chamber 322 assumes V-shaped, this
When choked flow runner 323 length h3 successively decreased from the center of die head to die head end, so can compensate fluid distribution main chamber 322
Losing along stroke pressure during middle conveying.The outlet edge 327 of distribution main chamber 322 assumes V-shaped, is conducive to increasing fluid in distribution master
Shear strength at wall during distribution flowing in chamber 322, such that it is able to increase the overall flow of fluid, it is to avoid fluid is close
Accumulation at wall.The size distributing the V-shaped angle, θ 1 in main chamber 322 as V-shaped then needs rheological behavior according to fluid, painting
The coating width h4 of the leftover of bolt of cloth and the section radius of main chamber runner, are determined by Theoretical Calculation and experimental analysiss, as Fig. 4 c institute
Show, wherein it is preferred that V-shaped distributes the span of the V-shaped angle, θ 1 in main chamber 322: 1≤180 ° of 120 °≤θ.
Furthermore it is contemplated that mobility in voltage stabilizing pair chamber 324 for the fluid, the wall 328 in voltage stabilizing pair chamber 324 is designed as tiltedly
Face, the bevel angle of wall 328 is θ 2, and wherein, the span of θ 2 is: 2≤50 ° of 30 °≤θ, thus can effectively increase
Plus mobility in voltage stabilizing pair chamber 324 for the fluid is it is preferred that for being more beneficial for flow of fluid, the section in voltage stabilizing pair chamber 324 is half
Water droplet structure, as shown in Figure 4 b, so, can reduce fluid and cause due to losing along stroke pressure when distributing and distributing in main chamber
Pressure uneven.Coating head 3 is still arranged voltage stabilizing pair chamber be mainly eliminate measuring rheological property fluctuation bring to painting
The impact of cloth effect.Size due to coating head pipes' analysis width h5 limitation voltage stabilizing pair chamber typically to be determined by size h2.
And, differential bolt group 35 can also be arranged on downstream mold 31, differential bolt group 35 can be used for regulated fluid
Outlet height h1, more uniform such that it is able to make to be coated onto figure layer on foil or sheet material.
These are only presently preferred embodiments of the present invention, be not limited to the present invention, all spirit in the present invention and
Any modification, equivalent and improvement of being made within principle etc., should be included within the scope of the present invention.
Claims (4)
1. a kind of slot coated head cavity body structure for fluid coating, including upstream mould (12), downstream mold (11) and be clipped in
Pad (13) between upstream mould (12) and downstream mold (11), upstream mould (12), downstream mold (11) and pad (13) are assembled to form
By fluid inlet (321), distribution main chamber (322), choked flow runner (323), voltage stabilizing pair chamber (324), expanded channel (325) and
The cavity that fluid issuing (326) forms；It is characterized in that:
Distribution main chamber (322) is set to V-shaped structure, and length h3 of choked flow runner (323) is passed from the center of die head to die head end
Subtract；
Distribution main chamber (322) is set to the V-shaped structure of section semicolumn, and, distributes the outlet edge (327) of main chamber (322)
Assume V-shaped setting；
The wall (328) of voltage stabilizing pair chamber (324) is set to inclined-plane, and, the section of voltage stabilizing pair chamber (324) is set to half water droplet knot
Structure；
The bevel angle of wall (328) is θ 2, wherein, the span of θ 2: 2≤50 ° of 30 °≤θ.
2. slot coated head cavity body structure according to claim 1 it is characterised in that: V-shaped distribute main chamber (322) V-shaped
Angle is θ 1, wherein, the span of θ 1: 1≤180 ° of 120 °≤θ.
3. according to the arbitrary described slot coated head cavity body structure of claim 1-2 it is characterised in that: the length of expanded channel is big
Length in choked flow runner.
4. according to slot coated head cavity body structure according to claim 3 it is characterised in that: upstream mould (12), downstream mold
(11) and pad (13) adopt mechanical assembly formed cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744609.XA CN104368498B (en) | 2014-12-09 | 2014-12-09 | Slot coating head cavity structure for fluid coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744609.XA CN104368498B (en) | 2014-12-09 | 2014-12-09 | Slot coating head cavity structure for fluid coating |
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| Publication Number | Publication Date |
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| CN104368498A CN104368498A (en) | 2015-02-25 |
| CN104368498B true CN104368498B (en) | 2017-01-18 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108043662B (en) * | 2018-01-23 | 2024-06-21 | 佛山市雅路斯工业设备有限公司 | Coating head |
| CN109107829A (en) * | 2018-09-26 | 2019-01-01 | 深圳市曼恩斯特科技有限公司 | Coating die head and coating machine |
| CN109759284B (en) * | 2019-03-21 | 2023-12-15 | 泉州市大疆涂布设备有限公司 | Coating machine coating die head convenient for quick and accurate replacement of gasket |
| TWI725585B (en) * | 2019-10-23 | 2021-04-21 | 財團法人工業技術研究院 | Slot die coater |
| CN115945353A (en) * | 2023-02-03 | 2023-04-11 | 上川精密科技(无锡)有限公司 | Coating die head for lithium battery slurry and V angle determining method |
| CN116441118B (en) * | 2023-04-10 | 2024-02-13 | 上川精密科技(无锡)有限公司 | Lithium battery coating die head cavity structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CH626817A5 (en) * | 1977-09-12 | 1981-12-15 | Ciba Geigy Ag | |
| JP2767714B2 (en) * | 1989-10-05 | 1998-06-18 | 富士写真フイルム株式会社 | Coating liquid injector |
| FR2904246B1 (en) * | 2006-07-27 | 2009-11-06 | Arjowiggins Soc Par Actions | MULTILAYER CURTAIN COATING APPARATUS AND METHOD |
| CN102553780A (en) * | 2011-12-20 | 2012-07-11 | 深圳市浩能科技有限公司 | Coating machine extrusion head for manufacturing lithium ion batteries |
| CN202778837U (en) * | 2012-07-27 | 2013-03-13 | 北京京东方光电科技有限公司 | Coating device |
| CN203862493U (en) * | 2014-04-10 | 2014-10-08 | 东莞市畅旭工业自动化设备有限公司 | Equal flow velocity extrusion mold head |
| CN204320592U (en) * | 2014-12-09 | 2015-05-13 | 深圳市旭合盛科技有限公司 | A kind of slot coated head cavity body structure for fluid coating |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180627 Address after: 518000 26 2A of Tianxin village and rich industrial area, Shijing street, Shenzhen, Guangdong. Patentee after: Shenzhen Manchester Ernst science and Technology Co., Ltd. Address before: 518000 Pingshan office, Pingshan District, Shenzhen six, Guangdong, China, No. D, No. 1, No. Patentee before: SHENZHEN XUHESHENG TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: No.3 workshop 101-201, area C, third industrial zone, Zhukeng community, Longtian street, Pingshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen manest Technology Co.,Ltd. Address before: 518000 26 2A of Tianxin village and rich industrial area, Shijing street, Shenzhen, Guangdong. Patentee before: SHENZHEN MANST TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |