CN105714607A - Curtain-type coating apparatus - Google Patents
Curtain-type coating apparatus Download PDFInfo
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- CN105714607A CN105714607A CN201410721731.5A CN201410721731A CN105714607A CN 105714607 A CN105714607 A CN 105714607A CN 201410721731 A CN201410721731 A CN 201410721731A CN 105714607 A CN105714607 A CN 105714607A
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- curtain
- coating
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- cloth
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Abstract
The present invention relates to a technological improvement of a coating apparatus, and discloses a curtain-type coating apparatus comprising a curtain-type coating head, guide plates and a recycling tray, the curtain-type coating apparatus is characterized in that: both sides of the curtain-type coating head are provided with the guide plates, top ends of the guide plates are fixed on both sides of the curtain-type coating head, bottoms of the guide plates extend above the recycling tray, a coating material is located just below the curtain-type coating head, and the recycling tray is located just below the coating material. The coating material is evenly coated with a coating by the curtain-type coating apparatus, curtain stability is high, equipment is simple, failure is less, frequent downtime for adjustment of edge determination devices on both sides can be avoided, product quality is high, and the curtain-type coating apparatus is suitable for improvement of the coating apparatus.
Description
Technical field
The present invention relates to the technological improvement of apparatus for coating, especially a kind of curtain coating device.
Background technology
Along with the development of the variation of social need and coating technique, the requirement of various coating apparatus is improved constantly.Different product has different coating apparatus, and wherein coating process is representational has: the coating of airblade coating, print roll coating, gauge stick and curtain-type coating etc..But along with the production of the on-line coater etc. being coated with at a high speed product such as thermal recording medium, magnetic recording material, ink jet recording materials, silver halide picture light-sensitive material, adhesive material and high speed paper, through frequently with curtain-type coating method.
Curtain-type coating comprises the steps；Coating solution is placed in distributing device, is discharged by slit, forms uniform thin film fluid and is retained in the guider of curtain limit, in order to is coated on the coating material surface that curtain-type moves, thus forming film at coating material surface.When coating solution is applied to the space formed between curtain limit guider and coating material surface, cause curtain coating width equal to or less than being coated with cloth material, this coating solution is pulled to the center of film in the direction of the width, result in so-called " curving inwardly " phenomenon, wherein the excess deposition of coating solution occurs in coating edge, concurrently form coating curtain instability, cause that coating curtain forms brokenly curtain in both sides, be coated with on cloth material and form leakage removing.
When this excess deposition is dried process in exsiccator, after exsiccator, opposite longitudinal side edge produces stain on paper web transferring roller or when paper web is exported, when even this excess deposition is completely dried on the dryer, the coating paper lead-out unit provided on coating machine derives coating paper, wherein on the same position in cylinder of the position of excess deposition, this just causes undesired thickening or bossing on cylinder, and excess deposition also can cause web breaks.Through calender, cause calendaring soft roller damaged, batch paper also due to edge protuberance and break.
In order to avoid coating edge place produces excess deposition, Japanese Patent Application Publication (JP-A) number 2000-513 discloses the flow velocity method close to the flow velocity at coating center by making slidingsurface reverse side place coating solution along dynamic surface opposite edge inflow assisted solution, but this kind of method needs substantial amounts of assisted solution, because it is to flow into along directional arrangement edge, assisted solution likely mixes with along edge guider inflow coating solution, or become uneven along edge guiding device to assisted solution flow velocity, therefore at coating edge place it cannot be guaranteed that stable deposition, produce substandard products.Additionally, these methods need complicated processing mechanism, simultaneously aborning because a variety of causes causes coating curtain to break, thus causing disconnected curtain, fault rate is high, and coating quality cannot be stablized；Needing shutdown to process when conversion metrics, process is complicated, and paper web stays limit unstable.
Japanese Patent Application Publication (JP-A) number 2000-254567 discloses by aspirating the method removing the curtain limit out-of-date deposition of guider lower edge.The shortcoming of the method is: only could remove out-of-date deposition when the out-of-date deposition of suction nozzle contact or when placing with excess deposition next-door neighbour.Accordingly, it would be desirable to use the distance between suction nozzle and paper web fairly small, but this makes the dust being attached on moving paper web surface adhere to cause web breaks on this suction nozzle；Equipment failure rate is high, and coating quality is unstable, must shut down process when conversion metrics, and process is complicated, and paper web stays limit unstable.
Japanese Patent Application Publication (JP-A) number 2004-16877 discloses following coating process: by making curtain width be folded the both sides of paper web more than web width and from curtain and paper surface collision upstream, produce uncoated portion in paper web both sides simultaneously.Although the method does not produce excess deposition really at coating edge, but the width ratio paper web that this curtain needs is big, and the part coating solution exceeding web width is not applied on paper web.The shortcoming of the method is: the both sides of paper web are folded by collision place upstream end, causes web breaks, and equipment failure rate is high, and coating quality cannot be stablized, and must shut down process when conversion metrics, and process is complicated, and paper web stays limit unstable.Excess deposition is produced for existing apparatus for coating; cause web breaks; equipment failure rate is high, and coating quality is unstable, and conversion metrics needs shutdown to process; process is complicated; how the problems such as paper web stays limit unstable, improve existing apparatus for coating, be applied on cloth material by coating solution equably; improve curtain stability and coating quality, be the important topic of the present invention.
Summary of the invention
Present invention aim to solve existing apparatus for coating and produce excess deposition, web breaks, equipment failure rate is high, and coating quality is unstable, and conversion metrics needs shutdown to process, and process is complicated, and paper web stays the problems such as limit instability, it is provided that a kind of curtain coating device.
The concrete scheme of the present invention is: improve for existing apparatus for coating, there is curtain-type and be coated with the leftover of bolt of cloth, deflector and recovery charging tray, it is characterized in that: curtain-type is coated with leftover of bolt of cloth both sides equipped with deflector, deflector top is fixed on curtain-type coating head both sides, the bottom of deflector extends above recovery charging tray, is coated with cloth material and is positioned at the underface of the curtain-type painting leftover of bolt of cloth, reclaims charging tray and be positioned at the underface being coated with cloth material.
The lower end of heretofore described deflector is lower than being coated with cloth material 5-10cm.
The angle of heretofore described deflector and vertical is 15-30 °.
The width of heretofore described deflector is 10-15cm.
The width ratio curtain-type of heretofore described recovery charging tray is coated with the width width 10-15cm of the leftover of bolt of cloth.
Heretofore described curtain-type is coated with the width width 20-30cm of the width ratio painting cloth material of the leftover of bolt of cloth.
The present invention has the advantage that compared with existing apparatus for coating
1. can being applied on cloth material by coating solution equably, curtain can run by the continuous of long-time stable, meanwhile avoids the phenomenon that the slight sideslip paper web of paper web stays limit unstable, and equipment simple fault rate is low, and product quality is high.
2. cost is low, and shutdown when decreasing conversion metrics processes, and production efficiency obtains significant raising.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
In figure: 1 deflector, 2 curtain-types are coated with the leftover of bolt of cloth, and 3 reclaim charging tray, and 4 are coated with cloth material.
Detailed description of the invention
Referring to Fig. 1, the present invention has curtain-type and is coated with the leftover of bolt of cloth 2, deflector 1 and recovery charging tray 3, it is characterized in that: curtain-type is coated with the leftover of bolt of cloth 2 both sides equipped with deflector 1, deflector 1 top is fixed on curtain-type coating head 2 both sides, the bottom of deflector 1 extends above recovery charging tray 3, is coated with cloth material 4 and is positioned at the underface of the curtain-type painting leftover of bolt of cloth 2, reclaims charging tray 3 and be positioned at the underface being coated with cloth material 4.
The lower end of deflector 1 described in the present embodiment is lower than being coated with cloth material 45-10cm.
The angle of deflector 1 described in the present embodiment and vertical is 15-30 °.
The width of deflector 1 described in the present embodiment is 10-15cm.
The width ratio curtain-type reclaiming charging tray 3 described in the present embodiment is coated with the width width 10-15cm of the leftover of bolt of cloth 2.
Curtain-type described in the present embodiment is coated with the width width 20-30cm of the width ratio painting cloth material 4 of the leftover of bolt of cloth 2.
Application conditions in the present embodiment is:
Coated substrates: quantitatively 50g/m2Thermosensitive body paper coating: 30% thermo colour
Dope viscosity: 250mPa s coating speed: 500m/min
Coating weight；3 ~ 4g/m2Coating width: 1720mm
Leading edge plate angle；15 ~ 30 ° of curtain height: 150mm
Water conservancy diversion plate hight: 250mm
Measure the thickness of its coating by measuring the material painting amount of different web positions, to detect the uniform situation of coating, in coating process, observe the stability of curtain both sides, if having swing simultaneously, when detecting quantitative, survey whether paper has buildup with procuratorial work.Correlation circumstance is as follows:
From the situation of production practices, by view picture feeding, reasonable to solve both sides coating curtain unstable, and curtain both sides feeding is excessive, and the problem of trimming buildup.
Claims (6)
1. a curtain coating device, there is curtain-type and be coated with the leftover of bolt of cloth, deflector and recovery charging tray, it is characterized in that: curtain-type is coated with leftover of bolt of cloth both sides equipped with deflector, deflector top is fixed on curtain-type coating head both sides, the bottom of deflector extends above recovery charging tray, is coated with cloth material and is positioned at the underface of the curtain-type painting leftover of bolt of cloth, reclaims charging tray and be positioned at the underface being coated with cloth material.
2. a kind of curtain coating device according to claim 1, is characterized in that: the lower end of described deflector is lower than being coated with cloth material 5-10cm.
3. a kind of curtain coating device according to claim 1, is characterized in that: the angle of described deflector and vertical is 15-30 °.
4. a kind of curtain coating device according to claim 1, is characterized in that: the width of described deflector is 10-15cm.
5. a kind of curtain coating device according to claim 1, is characterized in that: the width ratio curtain-type of described recovery charging tray is coated with the width width 10-15cm of the leftover of bolt of cloth.
6. a kind of curtain coating device according to claim 1, is characterized in that: described curtain-type is coated with the width width 20-30cm of the width ratio painting cloth material of the leftover of bolt of cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721731.5A CN105714607A (en) | 2014-12-03 | 2014-12-03 | Curtain-type coating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721731.5A CN105714607A (en) | 2014-12-03 | 2014-12-03 | Curtain-type coating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105714607A true CN105714607A (en) | 2016-06-29 |
Family
ID=56146460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410721731.5A Pending CN105714607A (en) | 2014-12-03 | 2014-12-03 | Curtain-type coating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105714607A (en) |
-
2014
- 2014-12-03 CN CN201410721731.5A patent/CN105714607A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |