CN207452546U - Synthetic leather production equipment - Google Patents
Synthetic leather production equipment Download PDFInfo
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- CN207452546U CN207452546U CN201720329598.8U CN201720329598U CN207452546U CN 207452546 U CN207452546 U CN 207452546U CN 201720329598 U CN201720329598 U CN 201720329598U CN 207452546 U CN207452546 U CN 207452546U
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- coating machine
- baking oven
- wind turbine
- conveyer belt
- synthetic leather
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Abstract
The utility model provides a kind of synthetic leather production equipment, including coating machine, baking oven, conveyer belt, the coating machine, which is used to apply in release paper, scrapes polyurethane fabric slurry, the conveyer belt is used to transmit cloth between coating machine, baking oven, the baking oven includes wind turbine, the baking oven is blown for internal volume, and the wind turbine, conveyer belt are also connected with control unit, and described control unit is also connected with scraper.Solve the problem of that the waterproof degree that pin hole promotes Waterproof Leather occurs in synthetic leather in the prior art.
Description
Technical field
The utility model is related to synthetic leather processing preparation field more particularly to a kind of productions of new polyurethane water-proof leather
Line.
Background technology
Synthetic leather is the substitute material of leather, as the improvement of people's living standards, people gradually pursue the day of high quality
With product, the demand of leather products is more and more, with animal protection realize enhancing, animal dermis it is impossible to meet
The demand of people, synthetic leather product are increasingly becoming following development trend, and synthetic leather is applied in the manufacture of raincoat Waterproof Leather, due to
Easily there is pin hole in not enough finely resulting in for manufacturing process, rub proofness also is difficult to meet the needs of market.
The content of the invention
The technical problems to be solved in the utility model is to provide a kind of new synthetic leather production equipment, solve existing
There is pin hole in synthetic leather in technology, the problem of promoting the waterproof degree of Waterproof Leather.
The utility model is realized in this way：A kind of synthetic leather production equipment, it is described including coating machine, baking oven, conveyer belt
Coating machine, which is used to apply in release paper, scrapes polyurethane fabric slurry, and the conveyer belt is used to transmit cloth between coating machine, baking oven
Material, the baking oven include wind turbine, and the baking oven is blown for internal volume, and the wind turbine, conveyer belt are also single with control
Member connection, described control unit are also connected with scraper.
Preferably, described control unit is additionally operable to control conveyer belt residence time in an oven, is additionally operable to control wind
Machine is to the air quantity blown in baking oven.
Optionally, the thickness of the scraper of the coating machine is adjusted by height adjustment mechanism, the height adjustment mechanism bag
Rack and pinion mechanism, pulley track mechanism or nut bolt mechanism are included, the thickness of the scraper can be adjusted between 3mm-12mm
Section.
Specifically, the coating machine includes expecting in the initial material coating machine set along conveyer belt direction, middle material coating machine, second
Coating machine, bottom material coating machine are expected in the initial material coating machine, middle material coating machine, second between coating machine, bottom material coating machine respectively
Preposition baking oven is provided with, the preposition baking oven includes preposition wind turbine, and described control unit is also connected with preposition wind turbine.
The utility model has the following advantages that：Scraped by the way that coating is applied several times, increase the thickness of coating, at the same every time compared with
Can preferably carry out cooling down in thin coating the processing of bubble, prevent Waterproof Leather from pin hole occur, promote the waterproof degree of raincoat leather.
Description of the drawings
Fig. 1 is the preparation method flow chart described in specific embodiment of the present invention；
Fig. 2 is the coating machine and baking oven schematic diagram described in specific embodiment of the present invention
Fig. 3 is the pipelined units connection relationship diagram described in specific embodiment of the present invention；
Fig. 4 is the coating machine scraper structure chart described in specific embodiment of the present invention；
Fig. 5 is the synthetic leather assembly line schematic diagram described in specific embodiment of the present invention.
Reference sign：
1st, coating machine；
10th, scraper；
11st, initial material coating machine；
12nd, middle material coating machine；
13rd, coating machine is expected in second；
14th, bottom material coating machine；
2nd, baking oven；
21st, preposition baking oven；
21st, wind turbine；
3rd, conveyer belt；
4th, control unit；
5th, converter unit.
Specific embodiment
For the technology contents of the utility model, construction feature, the objects and the effects are described in detail, below in conjunction with implementation
Mode simultaneously coordinates attached drawing to be explained in detail.
Referring to Fig. 1, the utility model polyurethane water-proof removes from office preparation method, including step S108, apply and scrape in release paper
After the completion of polyurethane fabric slurry, base fabric is bonded, frequency conversion stage by stage is dried, and specifically, is stopped in baking oven no more than 15 minutes,
Between wind turbine air output no more than 10 sides/point；Stopped again not less than 15 minutes, therebetween wind turbine air output not less than 18 sides/point；It treats cold
But removed afterwards, wind after obtain finished product.Wherein, polyurethane fabric slurry includes 860A：100 grams/m, DMF：60
Gram/m, methyl esters：20 grams/m, toner：6 grams/m and 2 grams/m of chromium is copper complex formazan wear-resisting to be helped
Agent.In the particular embodiment, slurry after configuration is complete, can be placed on ventilation stand 24 it is small when, so can not only
Some harmful chemical compositions are volatilized away, additionally it is possible to ensure there are enough fermentation times inside slurry so that slurry
Expect more toughness, the synthetic leather more flexible of generation." stop " mean, arbitrary particle is in an oven on synthetic leather
Time can be the cloth any place that is admitted on the time meter that baking oven is removed again or assembly line of monoblock cloth from
Into baking oven to go out used in baking oven time meter.The air quantity is the air quantity shared equally per square meter cloth, with the change of air quantity, quiet
Baking oven during putting can also be in different temperature.During slurry is dried, due to various chemicals in slurry
Boiling point is different, and during heating up and drying, if air quantity is excessive, temperature rise is too urgent, it will cause the boiling of chemicals from
And bubble is generated rapidly, these bubbles can leave the pin hole that more or less naked eyes can not be discovered in synthetic leather, once it is suppressing
Under these pin holes will become the valve of infiltration, cause the unqualified of product, if certainly initial air quantity is not big enough, temperature is inadequate
Height, just loses the meaning of drying, those chemicals volatilization in synthetic leather is insufficient, is easy to cause the environmental protection inspection of product
It surveys unqualified, endangers the health of user.Therefore in our embodiment, by above-mentioned steps, it is not less than in baking oven stop
15 minutes, therebetween wind turbine air output no more than 10 sides/point；Removed after cooling, wind after obtain finished product, oven temperature
It substantially controls in 70 (± 7) degree Celsius, at this time most preparation will not seethe with excitement, but accelerate volatilization since high temperature is in again
State can more effectively remove chemicals therein, be stopped again in the later stage not less than 15 minutes, therebetween wind turbine air output
Not less than 18 sides/point during, oven temperature is substantially controlled in 100 (± 10) degree Celsius, at this time the chemistry in cloth
Preparation volatilized it is similar after, will not cause to lead to the problem of pin hole, synthetic leather after this step drying is more tight
Real, wear-resisting, through the above scheme, the water pressure resistance value of the utility model is substantially improved, and can reach 10,000 more than mm.It is wear-resisting simultaneously
Property is substantially improved, and reaches and tests 5,000 turns with Martindale Method and do not break, and water pressure resistance also has the surplus of 5,000 mm.Finally, by
In removing chemicals in two steps, the product feature of environmental protection is also improved, odorlessness, high-environmental.
In other further embodiments, step is further included, applies scrape polyurethane fabric slurry several times, repeatedly applies and scrapes
Interprocedual carry out following step：
Stop in an oven no more than 10 minutes, therebetween wind turbine air output no more than 10 sides/point；It is stopped again not less than 10 points
Clock, therebetween wind turbine air output not less than 18 sides/point.The thickness that polyurethane fabric slurry is scraped in painting is also unsuitable excessively high, is subject to above-mentioned pin
The limitation of hole producing cause, our inventor have found that increasing the thickness of slurry coating can influence to make in production practices
The intestine evacuation velocity of bubble in journey, causes chemical residue, be also easy to so that temperature promoted it is not uniform enough, can still make
Cause to foam in journey so that the problem of finished product cloth is not fine and close enough, the thing followed is leak, not wear-resisting.Illustrate coating layer thickness
It is a conflicting combination with water proofing property, during this is solved the problems, such as, our inventor also found, although often
The thickness increase that secondary painting is scraped not necessarily causes the increase of wearability, but after proper treatment, the increase that the number of plies is scraped in painting is pair
The increase of wearability has positive effect.Therefore in the present embodiment, the slurry of nominal thickness is divided into multiple pasting, every time
Between pasting carry out step stopped in an oven no more than 10 minutes, therebetween wind turbine air output no more than 10 sides/point；It stops again not
Less than 10 minutes, therebetween wind turbine air output not less than 18 sides/point.It is stopped in early period no more than 10 minutes, therebetween wind turbine air output
No more than 10 sides/point, oven temperature is substantially controlled in 60 (± 6) degree Celsius, and at this time most preparation will not seethe with excitement, but
Since high temperature is again in the state for accelerating volatilization, more effectively chemicals therein can be removed, stopped again not in the later stage
Less than 10 minutes, therebetween wind turbine air output not less than 18 sides/point during, oven temperature is substantially controlled to be taken the photograph in 80 (± 8)
Family name's degree enables to each coating to form fine and close synthetic leather, and no pin hole simultaneously can be wear-resisting.Here it is arranged to stop for 10 minutes
Stay is because the slurry that early period, painting was scraped can pass through longer drying time afterwards, if drying time setting is too long easily rear
Phase finished product, which becomes fragile, to be hardened, and index is not achieved, can be as needed in the residence time after the painting of middle material is scraped and the secondary painting of middle material is scraped
Increase the residence time of part.It by the above method, can further increase the thickness of Waterproof Leather, and increase finished product thickness
In the case of, remain able to ensure Waterproof Leather compactness.
In a further preferred embodiment, the utility model method scrapes the step of polyurethane fabric slurry using point 4 paintings
Suddenly, the painting of polyurethane fabric initial material is specifically included to scrape, expect to apply in polyurethane fabric and scrape, expect to apply in second of polyurethane fabric and scrape, gather
The painting of urethane fabric bottom material is scraped.
Step is further included in the particular embodiment,
S101 carries out the painting of polyurethane fabric initial material with the scraper of thickness 5-8mm and scrapes；
S103 carries out material painting in polyurethane fabric with the scraper of thickness 8-12mm and scrapes；
S105 carries out second of painting of material in polyurethane fabric with the scraper of thickness 6-10mm and scrapes；
S107 carries out the painting of polyurethane fabric bottom material with the scraper of thickness 3-5mm and scrapes.
In the particular embodiment, it is 5mm-8mm that initial material painting, which scrapes middle scraper with design on fabric surface spacing, and middle scraper is scraped in middle material painting
It is 8mm-12mm with design on fabric surface spacing, it is 6mm-10mm that second of the painting of middle material, which scrapes middle scraper with design on fabric surface spacing, and bottom material applies
It is 3mm-5mm that middle scraper, which is scraped, with design on fabric surface spacing, and the slurry painting that the slurry of 30mm or so is refined as to 4 below 12mm is scraped.
Coating more than 12mm is difficult pin hole problems caused by overcoming gas boiling uneven, and optimal thickness substantially in 10mm, scrape by middle material painting
It is relatively thick, it can also ensure the thickness and wear-resistant index of finished product to the full extent.
It will illustrate the specific method of the utility model with some specific embodiments below：
Embodiment 1
It is applied in release paper and scrapes polyurethane fabric slurry；
The painting of polyurethane fabric initial material is carried out with the scraper of thickness 5mm to scrape；
Be sent into baking oven and stop 10 minutes, therebetween wind turbine air output be 8 sides/point；It stops again 10 minutes, wind turbine air-supply therebetween
Measure 19 sides/point.
Material painting in polyurethane fabric is carried out with the scraper of thickness 8mm to scrape；
Be sent into baking oven stop 9 minutes, therebetween 10 side of wind turbine air output/point；Stop 13 minutes again, therebetween wind turbine air output 20
Side/point；
Second of painting of material in polyurethane fabric is carried out with the scraper of thickness 6mm to scrape；
Be sent into baking oven and stop 8 minutes, therebetween 9 side of wind turbine air output/point；Stop 15 minutes again, therebetween wind turbine air output
18 sides/point；
The painting of polyurethane fabric bottom material is carried out with the scraper of thickness 5mm to scrape；
Be sent into baking oven and stop 15 minutes, therebetween 6 side of wind turbine air output/point；Stop 20 minutes again, therebetween wind turbine air output
24 sides/point.
Embodiment 2
It is applied in release paper and scrapes polyurethane fabric slurry；
The painting of polyurethane fabric initial material is carried out with the scraper of thickness 8mm to scrape；
Be sent into baking oven and stop no more than 7 minutes, therebetween 10 side of wind turbine air output/point；Stop 15 minutes again, therebetween wind turbine
18 side of air output/point.
Material painting in polyurethane fabric is carried out with the scraper of thickness 12mm to scrape；
Be sent into baking oven and stop 6 minutes, therebetween 9 side of wind turbine air output/point；Stop 11 minutes again, therebetween wind turbine air output
26 sides/point；
Second of painting of material in polyurethane fabric is carried out with the scraper of thickness 10mm to scrape；
Be sent into baking oven and stop 10 minutes, therebetween 8 side of wind turbine air output/point；Stop 12 minutes again, therebetween wind turbine air output
22 sides/point；
The painting of polyurethane fabric bottom material is carried out with the scraper of thickness 4mm to scrape；
Be sent into baking oven and stop 14 minutes, therebetween 8 side of wind turbine air output/point；Stop 19 minutes again, therebetween wind turbine air output
19 sides/point.
Embodiment 3
It is applied in release paper and scrapes polyurethane fabric slurry；
The painting of polyurethane fabric initial material is carried out with the scraper of thickness 6mm to scrape；
Be sent into baking oven and stop 8.5 minutes, therebetween 9.5 side of wind turbine air output/point；It stops again 12 minutes, wind turbine is sent therebetween
18.5 side of air quantity/point.
Material painting in polyurethane fabric is carried out with the scraper of thickness 10mm to scrape；
Be sent into baking oven and stop 7.5 minutes, therebetween 7.5 side of wind turbine air output/point；It stops again 13 minutes, wind turbine is sent therebetween
22 side of air quantity/point；
Second of painting of material in polyurethane fabric is carried out with the scraper of thickness 8mm to scrape；
Be sent into baking oven and stop 9.5 minutes, therebetween 8.5 side of wind turbine air output/point；It stops again 17 minutes, wind turbine is sent therebetween
22.5 side of air quantity/point；
The painting of polyurethane fabric bottom material is carried out with the scraper of thickness 3mm to scrape；
Be sent into baking oven and stop 10 minutes, therebetween 10 side of wind turbine air output/point；It stops again 15 minutes, wind turbine air-supply therebetween
Measure 26 sides/point.
Embodiment 4
It is applied in release paper and scrapes polyurethane fabric slurry；
The painting of polyurethane fabric initial material is carried out with the scraper of thickness 6.5mm to scrape；
Be sent into baking oven and stop 9.4 minutes, therebetween 8.7 side of wind turbine air output/point；Stop 12.3 minutes again, therebetween wind turbine
21 side of air output/point.
Material painting in polyurethane fabric is carried out with the scraper of thickness 10mm to scrape；
Be sent into baking oven and stop 7.2 minutes, therebetween 7.2 side of wind turbine air output/point；Stop 14.8 minutes again, therebetween wind turbine
22.1 side of air output/point；
Second of painting of material in polyurethane fabric is carried out with the scraper of thickness 8mm to scrape；
Be sent into baking oven and stop 6.4 minutes, therebetween 9.8 side of wind turbine air output/point；Stop 10.5 minutes again, therebetween wind turbine
23.7 side of air output/point；
The painting of polyurethane fabric bottom material is carried out with the scraper of thickness 4.5mm to scrape；
Be sent into baking oven and stop 13.7 minutes, therebetween 8.8 side of wind turbine air output/point；Stop 17.8 minutes again, therebetween wind turbine
18 side of air output/point.
In embodiment shown in Fig. 2, a kind of synthetic leather production equipment for being used to perform above-mentioned preparation method, bag are also disclosed
Coating machine 1, baking oven 2, conveyer belt 3 are included, the coating machine, which is used to apply in release paper, scrapes polyurethane fabric slurry, the conveyer belt
For transmitting cloth between coating machine, baking oven, the baking oven includes wind turbine 21, and the baking oven is sent for internal volume
Wind, in annexation figure shown in Fig. 3, the wind turbine 21, conveyer belt 3 are also connected with control unit 4, and described control unit is used
It advances in control conveyer belt 3 so that conveyer belt drives cloth once to stop in an oven no more than 15 minutes, and controls therebetween
Wind turbine in baking oven air-supply no more than 10 sides/point, then control conveyer belt stopped again not less than 15 minutes, and at it in baking oven
Between control wind turbine air output not less than 18 sides/point.Control unit 4 can be common processing chip, be generally positioned at intelligent end
Such as mobile phone, electronic computer are held, can be received user instructions by manual operation intelligent terminal, control unit, it can also
By the interior control for setting clock module and pre-programmed guarantee to the conveyer belt residence time, wind turbine 21 internal can set a change again
Frequency unit 5, converter unit 5 are connected with the power supply device of wind turbine, and converter unit 5 is communicated to connect with control unit 4, and converter unit leads to
The signal of reception control unit is crossed, the output power of wind turbine can be controlled to adjust air volume, it can also be by controlling wind turbine
The heating power of interior heating wire adjusts the temperature in baking oven.In other embodiments, can in baking oven set temperature sensor
It is connected with control unit, the working condition of converter unit is adjusted by the temperature information of feedback.Therefore, in our embodiment
In, by above equipment, cloth is stopped in baking oven not less than 15 minutes, therebetween wind turbine air output no more than 10 sides/point；It is to be cooled
After removed, wind after obtain finished product, oven temperature is substantially controlled in 70 (± 7) degree Celsius, at this time most system
Agent will not seethe with excitement, but since high temperature is again in the state for accelerating volatilization, can more effectively remove chemicals therein,
Later stage was stopped again not less than 15 minutes, therebetween wind turbine air output not less than 18 sides/point during, oven temperature is substantially controlled
System in 100 (± 10) degree Celsius, at this time the chemicals in cloth volatilized it is similar after, will not cause to generate pin hole
The problem of, synthetic leather more consolidation, wear-resisting after this step drying, through the above scheme, the water pressure resistance of the utility model
Value is substantially improved, and can reach 10,000 more than mm.Wearability is substantially improved simultaneously, reaches and tests 5,000 turns not with Martindale Method
It is broken, and water pressure resistance also has the surplus of 5,000 mm.Finally, due to remove chemicals in two steps, the product feature of environmental protection is also carried
Height, odorlessness, high-environmental.
In some optional embodiments, as shown in Fig. 2, production line only includes one group of coating machine 1 and baking oven 2, cloth exists
The slurry painting that different levels can be carried out on coating machine is scraped, and the drying procedure that baking oven must is fulfilled for crossing during coating several times will
It asks, therefore, in the particular embodiment, described control unit 4 is additionally operable to control conveyer belt, and once stop is not more than in an oven
10 minutes, and therebetween control wind turbine in baking oven air-supply no more than 10 sides/point, then control conveyer belt stopped again in baking oven
Not less than 10 minutes, and control therebetween wind turbine air output not less than 18 sides/point.By providing different drying patterns, produce
Line can complete the drying operation of different demands.
In a preferred embodiment, the coating machine of production line is also required to the different needs for meeting multiple coating, therefore is coated with
The blade thickness of machine is adjustable, as shown in figure 4, the thickness of the scraper 10 of the coating machine is adjusted by height adjustment mechanism, it is described
Height adjustment mechanism includes rack and pinion mechanism, pulley track mechanism or nut bolt mechanism, and the thickness of the scraper can be
It is adjusted between 3mm-12mm.Height adjustment mechanism is also connected with control unit, and control unit can scrape active accommodation as needed
The thickness of knife.It, can be by the way that a coating machine completion polyurethane fabric initial material painting is scraped, the painting of middle material is scraped, middle material by above-mentioned setting
The process that second of painting is scraped, bottom material painting is scraped.For the drying time of baking oven, control unit can receive the operation information of user,
Baking oven is allowed, with being switched in the operating mode of wind turbine air output, to be better carried out Synthetic Leather in several residence times
Production stage.
In the specific embodiment shown in some other Fig. 5, the coating machine includes setting along conveyer belt direction first
Expect to expect coating machine, bottom material coating machine, the initial material coating machine, middle material coating machine, second in coating machine, middle material coating machine, second
Preposition baking oven is respectively arranged between middle material coating machine, bottom material coating machine, forms initial material coating machine 11 --- preposition baking oven
21 --- middle --- preposition --- material coating machine 13 --- preposition baking oven 21 --- bottom material paintings in second of baking oven 21 of material coating machine 12
The production line of cloth machine 14 --- baking oven 2.The preposition baking oven includes preposition wind turbine, and described control unit also connects with preposition wind turbine
It connects, described control unit is additionally operable to control conveyer belt and is once stopped in preposition baking oven no more than 10 minutes, and controls therebetween
Preposition wind turbine in the preposition baking oven air-supply no more than 10 sides/point, then control conveyer belt stopped again not in the preposition baking oven
Less than 10 minutes, and control therebetween preposition wind turbine air output not less than 18 sides/point.By above-mentioned design, control unit can
Preposition baking oven and baking oven is controlled to provide different drying patterns, meets flow demand prepared by polyurethane water-proof leather, control unit
The blade thickness of coating machine can also be controlled, meets the thickness requirement that the painting of different phase Synthetic Leather slurry is scraped.
The above description is only the embodiments of the present invention, not thereby limits the scope of patent protection of the utility model,
Every equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly transported
Used in other related technical areas, it is equally included in the patent within the scope of the utility model.
Claims (4)
1. a kind of synthetic leather production equipment, which is characterized in that including coating machine, baking oven, conveyer belt, the coating machine be used for from
It is applied on type paper and scrapes polyurethane fabric slurry, for transmitting cloth between coating machine, baking oven, the baking oven includes the conveyer belt
Wind turbine, the baking oven are blown for internal volume, and the wind turbine, conveyer belt are also connected with control unit, the control
Unit is also connected with scraper.
2. synthetic leather production equipment according to claim 1, which is characterized in that described control unit is additionally operable to control transmission
Band residence time in an oven is additionally operable to control wind turbine to the air quantity blown in baking oven.
3. synthetic leather production equipment according to claim 1, which is characterized in that the thickness of the scraper of the coating machine passes through
Height adjustment mechanism is adjusted, and the height adjustment mechanism includes rack and pinion mechanism, pulley track mechanism or nut bolt mechanism,
The thickness of the scraper can be adjusted between 3mm-12mm.
4. synthetic leather production equipment according to claim 1, which is characterized in that the coating machine is included along conveyer belt direction
Coating machine, bottom material coating machine, the initial material coating machine, the coating of middle material are expected in the initial material coating machine of setting, middle material coating machine, second
To expect to be respectively arranged with preposition baking oven between coating machine, bottom material coating machine in machine, second, the preposition baking oven includes preposition wind turbine,
Described control unit is also connected with preposition wind turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720329598.8U CN207452546U (en) | 2017-03-31 | 2017-03-31 | Synthetic leather production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720329598.8U CN207452546U (en) | 2017-03-31 | 2017-03-31 | Synthetic leather production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207452546U true CN207452546U (en) | 2018-06-05 |
Family
ID=62246841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720329598.8U Active CN207452546U (en) | 2017-03-31 | 2017-03-31 | Synthetic leather production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207452546U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113441358A (en) * | 2021-07-26 | 2021-09-28 | 苏州桐力光电股份有限公司 | Coating mechanism and coating machine |
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2017
- 2017-03-31 CN CN201720329598.8U patent/CN207452546U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113441358A (en) * | 2021-07-26 | 2021-09-28 | 苏州桐力光电股份有限公司 | Coating mechanism and coating machine |
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