CN208437142U - A kind of coating head unit and coating machine - Google Patents
A kind of coating head unit and coating machine Download PDFInfo
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- CN208437142U CN208437142U CN201820810056.7U CN201820810056U CN208437142U CN 208437142 U CN208437142 U CN 208437142U CN 201820810056 U CN201820810056 U CN 201820810056U CN 208437142 U CN208437142 U CN 208437142U
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- plunger
- cylinder
- frame glue
- head unit
- coating
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Abstract
The utility model discloses a kind of coating head unit and coating machines, are related to coating machine technical field.Coating head unit includes cylinder, the upper end opening of the cylinder, lower end are provided with nozzle, and sliding is provided with plunger in the cylinder, the form and dimension of the plunger and the form and dimension of the lumenal cross-section of the cylinder match, and are provided with through-hole on the end face of the plunger.Coating head unit is acted on plunger by setting plunger, gas pressure, is moved down by plunger and squeeze out frame glue, can avoid the occurrence of the problem of frame glue can not be normally coated with.Meanwhile the inner wall that cylinder can also be effectively prevented from by the way that plunger is arranged sticks together frame glue, promotes the utilization rate of frame glue., can be by the way that by plunger and frame glue, resorption to be to the top of cylinder together to vacuumizing in cylinder in addition, can also meet the needs of resorption step in coating process by the way that through-hole is arranged on plunger, when guarantee is not coated with, frame glue will not be leaked out by nozzle under the effect of gravity.
Description
Technical field
The utility model relates to coating machine technical field more particularly to a kind of coating head units and coating machine.
Background technique
Liquid crystal display or liquid crystal display with 3D effect are in ODF (One Drop Filling, formula of dripping injection
Method) it is required to be coated with frame glue on the glass substrate before molding process.As shown in Figure 1, needing before coating frame glue 4' by frame glue 4'
It by being taken out in packaging, and is put into container 2', container 2' is squeezed by plunger 3', so that the frame glue 4' in container 2' injects coating
In the coating head unit 1' of machine, frame glue 4' moves to the bottom of coating head unit 1' under the effect of gravity, and passes through gas
Body is squeezed by spraying in coating head unit 1', to be coated.
Due to the requirement of ODF molding process, frame glue 4' needs to keep a more stable towering state before at box, because
This needs the viscosity of frame glue 4' itself larger, leads to the presence of following two aspect in existing coating process:
On the one hand, as shown in Fig. 2, frame glue 4', since frame glue 4' viscosity is larger, holds very much when entering in coating head unit 1'
Easily there is frame glue 4' to stick together on the inner wall of coating head unit 1', coating head unit 1' can not be moved under self gravitation effect
Bottom, or even block coating head unit 1', lead to not normally be coated with frame glue 4', ultimately cause liquid crystal into box exception, nothing
Liquid crystal is lived in method sealing, leads to scrap of the product.
On the other hand, since frame glue 4' viscosity is larger, to guarantee product quality, it is necessary to the frame glue 4' in coating head unit 1'
Substitute material before having used completely, is otherwise easy to lead to frame glue 4' close to occurring the problem of disconnected glue when having used in frame glue 4'
It can not be fully utilized.Meanwhile with the use of frame glue 4', it will appear residual on the inner wall of coating head unit 1', further decrease
The utilization rate of frame glue 4'.
Utility model content
One purpose of the utility model is to propose a kind of coating head unit, to solve in the prior art because of frame glue viscosity
It is larger and lead to not the problem of being normally coated with.
For this purpose, the utility model uses following technical scheme:
A kind of coating head unit, including cylinder, the upper end opening of the cylinder, lower end are provided with nozzle, in the cylinder
Sliding is provided with plunger, and the form and dimension of the plunger and the form and dimension of the lumenal cross-section of the cylinder match,
And through-hole is provided on the end face of the plunger.
Wherein, the plunger is made of polytetrafluoroethylene material.
Wherein, the outer surface of the plunger is provided with polytetrafluorethylecoatings coatings.
Wherein, the diameter of the through-hole is 0.8-1mm.
Wherein, more than two through-holes are provided on the end face of the plunger.
Wherein, more than two through-holes are distributed in the end face of the plunger.
Another purpose of the utility model is to propose a kind of coating machine, can solve in the prior art because of frame glue viscosity
It is larger and lead to not the problem of being normally coated with.
For this purpose, the utility model uses following technical scheme:
A kind of coating machine, including coating head unit as described above.
Wherein, the coating machine further includes driving assembly, and the driving component is for driving the plunger to move down.
Wherein, the driving component includes air charging system, and the opening of the air charging system and the cylinder upper end connects
It is logical.
Wherein, the coating machine further includes vacuumizing assembly, and the vacuumizing assembly is opened with the described of the cylinder upper end
Mouth connection.
The utility model has the advantages that the utility model provides a kind of coating head unit and coating machine.Coating head unit is provided with plunger,
Gas pressure acts on plunger, is moved down by plunger and squeezes out frame glue, and can avoid the occurrence of frame glue can not normally be coated with
The problem of.Meanwhile the inner wall that cylinder can also be effectively prevented from by the way that plunger is arranged sticks together frame glue, promotes the utilization rate of frame glue.
In addition, can also meet the needs of resorption step in coating process by the way that through-hole is arranged on plunger, it can be by cylinder
It vacuumizes plunger and frame glue together resorption to the top of cylinder, when guarantee is not coated with, frame glue will not be under the effect of gravity by spraying
Mouth leaks out.
Detailed description of the invention
Fig. 1 is the schematic diagram that coating head unit is filled with frame glue in the prior art；
Fig. 2 be in the prior art in coating head unit frame glue can not normal use when state diagram；
Fig. 3 is the structural schematic diagram of coating head unit provided by the utility model；
Fig. 4 is the structural schematic diagram of plunger provided by the utility model.
Wherein:
1, cylinder；11, nozzle；12, it is open；2, plunger；21, through-hole；
1', coating head unit；2', container；3', plunger；4', frame glue.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer,
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
A kind of coating machine is present embodiments provided, coating machine can be used for the coating frame glue technique in liquid crystal display.It applies
Cloth machine includes main body and the coating head unit that is set in main body, as shown in figure 3, coating head unit includes cylinder 1, in cylinder 1
Sky, the upper end opening 12 of cylinder 1, for injecting frame glue, lower end is provided with nozzle 11, and frame glue is sprayed after being pressurized by nozzle 11.
Side wall in order to avoid frame glue in cylinder 1 adheres to, and makes frame glue that can not be moved downward to the bottom of cylinder 1 automatically, this
Coating head unit in embodiment also adds plunger 2, and plunger 2 is set in cylinder 1, and can slide along cylinder 1, plunger 2
Form and dimension and the form and dimension of the inner hole of cylinder 1 match.In use, plunger 2 moves down, it will be in cylinder 1
Frame glue is squeezed to 11 direction of nozzle, can have air to avoid between frame glue and nozzle 11, to prevent from being adhered to cylinder 1 because of frame glue
Inner wall on and there is the problem of can not being normally coated with, guarantee product quality.
In addition, the inner wall that can also be effectively prevented from cylinder 1 by the way that plunger 2 is arranged sticks together frame glue, the outer peripheral surface of plunger 2 with
The inner wall of cylinder 1 contacts, and can also scrape the frame glue sticked together on inner wall, promote the utilization rate of frame glue.
Since liquid crystal display is very high to purity requirements in process of production, the sundries such as particle cannot be mixed into frame glue,
It is therefore desirable to which the material of plunger 2 is harder, and has certain wearability, plunger 2 is avoided to grind by gas pressure or with cylinder 1
Frame glue is polluted after damage.In addition, coating head unit also needs to clean using special solvent after using, plunger 2 also needs to have
There is corrosion resistance, does not react with cleaning solvent.In the present embodiment, plunger 2 can use polytetrafluoroethylene (PTFE)
(Polytetrafluoroethylene, PTFE) is made.Polytetrafluoroethylene (PTFE) is also known as Teflon, have antiacid alkali resistant, resist it is various
The characteristics of organic solvent, is practically insoluble in all solvents.Meanwhile polytetrafluoroethylene (PTFE) has the characteristics that resistant to high temperature, its friction
Coefficient is extremely low, can make lubricating action.In other embodiments, plunger 2 can also use other material systems as characterized above
At.
In other embodiments, the material of plunger 2 can not be limited, but is coated with polytetrafluoro on the outer surface of plunger 2
Vinyl coating can also avoid plunger 2 from reacting with cleaning solvent on the basis of reducing the abrasion of plunger 2.
In the present embodiment, coating machine further includes driving assembly, and driving assembly is for driving plunger 2 to move down, thus will
Frame glue is sprayed by nozzle 11.Wherein, driving assembly can be air charging system, the opening 12 of air charging system and the upper end of cylinder 1
Connection.In use, being filled with gas into cylinder 1, in gas effect and plunger 2, and plunger 2 is pushed to move down, to squeeze
Frame glue.Wherein, the gas being filled with can be nitrogen, and nitrogen is stablized, it is ensured that process safety.In other embodiments, it drives
Component may be cylinder, hydraulic cylinder etc., as long as plunger 2 can be driven to move down.
In actual use, frame glue needs discontinuously to be coated on substrate coating machine, in order to avoid frame glue is in gravity
Under leaked out by nozzle 11, it is also necessary to when being not coated with frame glue, by be located at nozzle 11 at the upward resorption of frame glue, avoid outside frame glue
Leakage.If plunger 2 is that solid construction, by the effect of air pressure back suction, is only capable of for plunger 2 being drawn onto the top of cylinder 1 during resorption
Portion, and cannot internally portion frame glue effect, that is, cannot achieve the effect to frame glue resorption, therefore, in the present embodiment, coating machine is also
Including vacuumizing assembly, vacuumizing assembly is connected to the upper end opening 12 of cylinder 1, and through-hole 21 is provided on the end face of plunger 2.When
When needing resorption frame glue, vacuumizing assembly work will vacuumize, plunger 2 and frame glue will be under the action of gas differential pressures in cylinder 1
It moves up, realizes the resorption of frame glue.
For guarantee plunger 2 be pressed down against frame glue when, frame glue will not be squeezed out by through-hole 21, and during resorption, plunger 2 with
Frame glue moves upwardly together, and the aperture of through-hole 21 should not be too large or too small.Since the viscosity of frame glue is larger, about 200000~
400000mpa.s, and there is certain tension, the diameter of through-hole 21 can be 0.8-1mm, i.e., not will lead to frame glue and pass through through-hole
It squeezes out upwards, plunger 2 will not be only drawn back into the top of cylinder 1 during resorption, can will pass through column after extruding
Plug 2 and frame glue are seen as an entirety, to improve the utilization rate of frame glue.
As shown in figure 4, when to improve resorption frame glue stress uniformity, can be set on the end face of plunger 2 there are two with
On through-hole 21, the particular number of through-hole 21 can adjust according to actual needs.More than two through-holes 21 can be uniformly distributed
On the end face of plunger 2, the uniformity of plunger 2 and frame glue stress can be further improved.
In the present embodiment, the diameter of cylinder 1 can be 10mm, and length can be 120-130mm, comprehensive cylinder 1 and plunger 2
Size, through-hole 21 can be set to two, and two through-holes 21 are arranged with respect to the axisymmetrical of cylinder 1.
The above content is only the preferred embodiment of the utility model, for those of ordinary skill in the art, according to this reality
With novel thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as
Limitations of the present invention.
Claims (10)
1. a kind of coating head unit, including cylinder (1), the upper end opening (12) of the cylinder (1), lower end is provided with nozzle
(11), which is characterized in that sliding is provided with plunger (2) in the cylinder (1), the form and dimension of the plunger (2) with it is described
The form and dimension of the lumenal cross-section of cylinder (1) matches, and through-hole (21) are provided on the end face of the plunger (2).
2. coating head unit as described in claim 1, which is characterized in that the plunger (2) is made of polytetrafluoroethylene material.
3. coating head unit as described in claim 1, which is characterized in that the outer surface of the plunger (2) is provided with polytetrafluoro
Vinyl coating.
4. coating head unit as described in claim 1, which is characterized in that the diameter of the through-hole (21) is 0.8-1mm.
5. coating head unit as described in claim 1, which is characterized in that on the end face of the plunger (2) setting there are two with
The upper through-hole (21).
6. coating head unit as claimed in claim 5, which is characterized in that more than two through-holes (21) are distributed in the column
Fill in the end face of (2).
7. a kind of coating machine, which is characterized in that including coating head unit such as of any of claims 1-6.
8. coating machine as claimed in claim 7, which is characterized in that the coating machine further includes driving assembly, the driving group
Part is for driving the plunger (2) to move down.
9. coating machine as claimed in claim 8, which is characterized in that the driving component includes air charging system, the inflation dress
It sets and is connected to the opening (12) of the cylinder (1) upper end.
10. coating machine as claimed in claim 7, which is characterized in that the coating machine further includes vacuumizing assembly, described to take out very
Empty component is connected to the opening (12) of the cylinder (1) upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820810056.7U CN208437142U (en) | 2018-05-29 | 2018-05-29 | A kind of coating head unit and coating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820810056.7U CN208437142U (en) | 2018-05-29 | 2018-05-29 | A kind of coating head unit and coating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208437142U true CN208437142U (en) | 2019-01-29 |
Family
ID=65092183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820810056.7U Active CN208437142U (en) | 2018-05-29 | 2018-05-29 | A kind of coating head unit and coating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208437142U (en) |
-
2018
- 2018-05-29 CN CN201820810056.7U patent/CN208437142U/en active Active
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