CN108007149A - A kind of waterproof coiled material tyre cloth high efficiency drying device - Google Patents
A kind of waterproof coiled material tyre cloth high efficiency drying device Download PDFInfo
- Publication number
- CN108007149A CN108007149A CN201711107563.0A CN201711107563A CN108007149A CN 108007149 A CN108007149 A CN 108007149A CN 201711107563 A CN201711107563 A CN 201711107563A CN 108007149 A CN108007149 A CN 108007149A
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- CN
- China
- Prior art keywords
- chamber
- drying
- roller
- cloth
- high efficiency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/06—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path
- F26B13/08—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path using rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/02—Applications of driving mechanisms, not covered by another subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Textile Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of waterproof coiled material tyre cloth high efficiency drying device, including drying baker, in the drying baker drying chamber being sequentially communicated is separated into by multiple partition plates, hot air chamber and Heat Room, the tip position of the drying chamber is provided with bellows chamber, the bottom of bellows chamber is equipped with multiple directions air outlet directed downwardly, upper plate and bottom plate are additionally provided with drying chamber, upper plate and bottom plate are fixed on the side wall of drying chamber in the both ends of distribution and upper plate up and down, bottom plate is installed in drying chamber by floor board framing, draw-out roller is also equipped with the floor board framing, the beneficial effects of the invention are as follows：Tire cloth is successively across multiple fixed conveyor rollers and movable drive roller, the exit slot opened up after the guiding of draw-out roller from chamber door is pierced by and is wrapped on cloth-gathering roller, and tire cloth can be sufficiently spread out, and is allowed to contact with the hot wind of air outlet discharge, drying operation, good drying effect are carried out to tire cloth.
Description
Technical field
The present invention relates to the production of waterproof roll, is specifically a kind of waterproof coiled material tyre cloth high efficiency drying device.
Background technology
Waterproof roll is mainly used for construction wall, roofing and tunnel, highway, refuse landfill etc., plays and resists
A kind of rollable flexible building material product into web-like of extraneous rainwater, underground water leakage, as between engineering foundation and building
Ne-leakage connects, and is first of barrier of whole engineering waterproofing, whole engineering is played a crucial role.Modified pitch is prevented
Water coiled material is to be cited as invading stain coating with SBS modified rubber asphalt, with polyester fiber non-woven fabric, gunny cloth, glass fiber felt etc.
Tire cloth is made as respectively, using plastic film as anti-sticking separation layer, through selection, dispensing, congruent melting, invades the works such as stain, composite molding, curling
Sequence processing and fabricating.Existing tire cloth drying unit, it is complicated, efficiency is low, influence the production efficiency of waterproof roll.
The content of the invention
It is an object of the invention to provide a kind of waterproof coiled material tyre cloth high efficiency drying device, to solve in above-mentioned background technology
The problem of proposition.
To achieve the above object, the present invention provides following technical solution：
A kind of waterproof coiled material tyre cloth high efficiency drying device, including drying baker, in the drying baker by multiple partition plates be separated into according to
Drying chamber, hot air chamber and the Heat Room of secondary connection, the tip position of the drying chamber are provided with bellows chamber, and the bottom of bellows chamber is equipped with more
A air outlet being directed downward, the interior of drying chamber are additionally provided with upper plate and bottom plate, and upper plate and bottom plate are in distribution and upper top up and down
The both ends of plate are fixed on the side wall of drying chamber, and bottom plate is installed in drying chamber by floor board framing, is also installed on the floor board framing
There is a draw-out roller, the lower surface of upper plate is provided with the multiple fixed conveyor rollers being arranged in a linear, and the upper surface of bottom plate is provided with more
A multiple movable drive rollers being arranged in a linear, the movable drive roller include roll body, roll body mounting bracket, movable plate, outer sleeve body
And spring, the bottom of the outer sleeve body are fixed on bottom plate, roll body is installed on roll body mounting bracket, and the bottom of roll body mounting bracket is inserted
Enter into the internal cavities of outer sleeve body, the minimum end position of roll body mounting bracket is fixed with the bottom of movable plate, movable plate and outer sleeve body
Spring is additionally provided between portion, a side position of drying baker offers chamber door, puts the tire cloth that is wound on cloth rod by being opened up on chamber door
Fabric input mouth is entered inside drying chamber, and successively across multiple fixed conveyor rollers and movable drive roller, by the guiding of draw-out roller
The exit slot opened up afterwards from chamber door is pierced by and is wrapped on cloth-gathering roller；Heat pump is installed in the hot air chamber, drying chamber and
The junction of hot air chamber is provided with wind turbine；The bottom position of drying chamber is equipped with exhaust hood, and suction fan is provided with exhaust hood, row
Fan housing is connected with being placed in the indoor dehumidification tube of heat exchange, and dehumidification tube is connected by heat-exchanging spiral-coil with stretching out the air outlet pipe of Heat Room,
Heat-exchanging spiral-coil is wrapped in the outside of fresh wind tube, and fresh wind tube is extend into Heat Room；The heat pump, wind turbine and installed in air draft
Suction fan in cover is connected with external power supply and controlling switch；The drying baker is made of insulation material or drying baker
Outside is equipped with insulation material.
As the further scheme of the present invention：The air output of the air outlet of the bellows chamber is from the position of close wind turbine away from
The position of wind turbine gradually increases.
As further scheme of the invention：The bottom of the floor board framing is provided with multiple universal wheels.
As further scheme of the invention：Strainer is also equipped with the cover mouth position of the exhaust hood.
As further scheme of the invention：The nozzle position of the fresh wind tube is equally provided with strainer.
As further scheme of the invention：The leaving air temp of the heat pump is adjusted by temperature controller.
As further scheme of the invention：Between the adjacent fixed conveyor roller and the adjacent movable drive
Spacing between roller is adjustable.
Compared with prior art, the beneficial effects of the invention are as follows：Tire cloth is passed across multiple fixed conveyor rollers and activity successively
Dynamic roller, the exit slot opened up after the guiding of draw-out roller from chamber door are pierced by and are wrapped on cloth-gathering roller, and tire cloth can be fully
Expansion, is allowed to contact with the hot wind of air outlet discharge, carries out drying operation, good drying effect to tire cloth, and overall structure is tight
Gather, design is reasonable, can be widely used in the production of waterproof roll.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of waterproof coiled material tyre cloth high efficiency drying device.
Fig. 2 is a kind of structure diagram of movable drive roller in waterproof coiled material tyre cloth high efficiency drying device.
Fig. 3 is a kind of structure diagram of heat-exchanging spiral-coil in waterproof coiled material tyre cloth high efficiency drying device.
In figure：1- drying bakers, 2- drying chambers, 3- hot air chambers, 4- Heat Rooms, 5- chamber doors, 6- upper plates, 7- tires cloth, 8- into
Cloth mouth, 9- exit slots, 10- fixed conveyors roller, 11- movable drives roller, 12- bellows chambers, 13- air outlets, 14- wind turbines, 15- heat pumps,
16- bottom plates, 17- draw-out rollers, 18- floor board framings, 19- exhaust hoods, 20- dehumidification tubes, 21- heat-exchanging spiral-coils, 22- air outlet pipes, 23- are new
Air hose, 24- roll bodies, 25- roll bodies mounting bracket, 26- movable plates, 27- outer sleeve bodies, 28- springs.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Please refer to Fig.1~3, in the embodiment of the present invention, a kind of waterproof coiled material tyre cloth high efficiency drying device, including drying baker 1,
The drying chamber 2 being sequentially communicated, hot air chamber 3 and Heat Room 4, the drying chamber 2 are separated into by multiple partition plates in the drying baker 1
Tip position bellows chamber 12 is installed, the bottom of bellows chamber 12 is equipped with multiple directions air outlet 13 directed downwardly, and the interior of drying chamber 2 is also set
There are upper plate 6 and bottom plate 16, upper plate 6 and bottom plate 16 are fixed on the side wall of drying chamber 2 in the both ends of distribution and upper plate 6 up and down
On, bottom plate 16 is installed in drying chamber 2 by floor board framing 18, and draw-out roller 18 is also equipped with the floor board framing 18, upper plate 6
Lower surface is provided with the multiple fixed conveyor rollers 10 being arranged in a linear, and the upper surface of bottom plate 16 is provided with multiple be arranged in a linear
Multiple movable drive rollers 11, for driving tire cloth 7 to move, a side position of drying baker 1 offers chamber door 5, puts and is wound on cloth rod
Tire cloth 7 entered by the fabric input mouth 8 opened up on chamber door 5 inside drying chamber 2, and successively across multiple fixed conveyor rollers 10 and living
Dynamic live-roller 11, the exit slot 9 opened up after the guiding of draw-out roller 18 from chamber door 5 are pierced by and are wrapped on cloth-gathering roller,
Tire cloth 7 can be unfolded, be allowed to contact with the hot wind that air outlet 13 is discharged, drying operation is carried out to tire cloth 7；The hot air chamber 3
Heat pump 15 is inside installed, the junction of drying chamber 2 and hot air chamber 3 is provided with wind turbine 14, and the hot wind for heat pump 15 to be produced is sent
Enter into bellows chamber 12；The bottom position of drying chamber 2 is equipped with exhaust hood 19, and suction fan, exhaust hood 19 are provided with exhaust hood 19
It is connected with the dehumidification tube 20 being placed in Heat Room 4, dehumidification tube 20 passes through heat-exchanging spiral-coil 21 and the air outlet pipe 22 for stretching out Heat Room 4
Connection, heat-exchanging spiral-coil 21 are wrapped in the outside of fresh wind tube 23, and fresh wind tube 23 is extend into Heat Room 4, is discharged through exhaust hood 19
The hot gas with residual temperature enter heat-exchanging spiral-coil 21 after, with fresh wind tube 23 normal temperature air produce heat exchange, to room temperature
Air is preheated, and reduces the energy consumption of heat pump 15, waste heat is reused, is economized on resources；The heat pump 15, wind turbine 14 with
And the suction fan in exhaust hood 19 is connected with external power supply and controlling switch.
The movable drive roller 11 includes roll body 24, roll body mounting bracket 25, movable plate 26, outer sleeve body 27 and spring 28, institute
The bottom for stating outer sleeve body 27 is fixed on bottom plate 16, and roll body 24 is installed on roll body mounting bracket 25, the bottom of roll body mounting bracket 25
It is inserted into the internal cavities of outer sleeve body 27, the minimum end position of roll body mounting bracket 25 is fixed with movable plate 26,26 He of movable plate
Spring 28 is additionally provided between the bottom of outer sleeve body 27 so that the height of roll body 24 has certain activity surplus, easy to adjust tire
The tension force of cloth 7, makes it keep efficient transmission.
The bottom of the floor board framing 18 is provided with multiple universal wheels, and bottom plate 16 can be caused together with movable drive roller 11
Moved away in from drying chamber 2, easy to be overhauled to it.
Strainer is also equipped with the cover mouth position of the exhaust hood 19, easy to be filtered to flue dust.
The nozzle position of the fresh wind tube 23 is equally provided with strainer, prevents external dust impurity from being polluted to tire cloth 7.
The drying baker 1 is made of insulation material or the outside of drying baker 1 is equipped with insulation material, reduces the damage of thermal energy
Lose.
Spacing between the adjacent fixed conveyor roller 10 between the adjacent movable drive roller 11 is adjustable, is easy to
Lifting and the contact area of tire cloth 7 and hot wind, lift drying effect.
Position of the air output of air outlet 13 from close to the position of wind turbine 14 to away from wind turbine 14 is gradual on the bellows chamber 12
Increase, reduce pressure drop influences caused by drying effect.
The leaving air temp of the heat pump 15 is adjusted by temperature controller.
The present invention operation principle be：During work, put cloth rod and cloth-gathering roller rotates synchronously so that tire cloth 7 is in drying chamber 2
Movement, exterior normal temperature air are entered in Heat Room 4 by fresh wind tube 23, and with carrying the moisture of residual temperature in heat-exchanging spiral-coil 21
Exchange heat, normal temperature air is preheated, reduce the energy consumption of heat pump 15, waste heat is reused, is economized on resources, exchange heat
Air afterwards is sent in bellows chamber 12 after the heating of heat pump 15 by wind turbine 14, and the hot-air in bellows chamber 12 is from outlet air
Mouthfuls 13 discharge, and drying operation is carried out to tire cloth 7, and the air after drying is and new after exhaust hood 19 enters heat-exchanging spiral-coil 21
Normal temperature air in air hose 23 produces heat exchange, is then discharged from air outlet pipe 22.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (7)
1. a kind of waterproof coiled material tyre cloth high efficiency drying device, including drying baker（1）, it is characterised in that the drying baker（1）It is interior logical
Cross multiple partition plates and be separated into the drying chamber being sequentially communicated（2）, hot air chamber（3）And Heat Room（4）, the drying chamber（2）Top
Position is provided with bellows chamber（12）, bellows chamber（12）Bottom be equipped with multiple directions air outlet directed downwardly（13）, drying chamber（2）It is interior also
Equipped with upper plate（6）And bottom plate（16）, upper plate（6）And bottom plate（16）In upper and lower distribution and upper plate（6）Both ends be fixed on
Drying chamber（2）Side wall on, bottom plate（16）Pass through floor board framing（18）Installed in drying chamber（2）It is interior, the floor board framing（18）It is upper to go back
Draw-out roller is installed（18）, upper plate（6）Lower surface the multiple fixed conveyor rollers being arranged in a linear are installed（10）, bottom plate
（16）Upper surface multiple multiple movable drive rollers being arranged in a linear are installed（11）, the movable drive roller（11）Including roller
Body（24）, roll body mounting bracket（25）, movable plate（26）, outer sleeve body（27）And spring（28）, the outer sleeve body（27）Bottom consolidate
It is scheduled on bottom plate（16）On, roll body（24）Installed in roll body mounting bracket（25）On, roll body mounting bracket（25）Bottom be inserted into overcoat
Body（27）Internal cavities in, roll body mounting bracket（25）Minimum end position be fixed with movable plate（26）, movable plate（26）With it is outer
Body（27）Bottom between be additionally provided with spring（28）, drying baker（1）A side position offer chamber door（5）, put and received on cloth rod
The tire cloth of volume（7）By chamber door（5）On the fabric input mouth that opens up（8）Enter drying chamber（2）Inside, and successively across multiple fixed biographies
Dynamic roller（10）With movable drive roller（11）, by draw-out roller（18）Guiding after from chamber door（5）On the exit slot that opens up（9）Wear
Go out and be wrapped on cloth-gathering roller；The hot air chamber（3）Heat pump is inside installed（15）, drying chamber（2）And hot air chamber（3）Junction
Wind turbine is installed（14）；Drying chamber（2）Bottom position be equipped with exhaust hood（19）, exhaust hood（19）Suction fan is inside installed,
Exhaust hood（19）With being placed in Heat Room（4）Interior dehumidification tube（20）Connection, dehumidification tube（20）Pass through heat-exchanging spiral-coil（21）With stretching
Go out Heat Room（4）Air outlet pipe（22）Connection, heat-exchanging spiral-coil（21）It is wrapped in fresh wind tube（23）Outside, fresh wind tube（23）Stretch
Enter to Heat Room（4）It is interior；The heat pump（15）, wind turbine（14）And installed in exhaust hood（19）Interior suction fan with outside
Power supply is connected with controlling switch, the drying baker（1）It is made or drying baker using insulation material（1）Outside be equipped with thermal insulating material
Matter.
A kind of 2. waterproof coiled material tyre cloth high efficiency drying device according to claim 1, it is characterised in that the bellows chamber（12）
Upper air outlet（13）Air output from close to wind（14）Position to away from wind turbine（14）Position gradually increase.
A kind of 3. waterproof coiled material tyre cloth high efficiency drying device according to claim 2, it is characterised in that the floor board framing
（18）Bottom multiple universal wheels are installed.
A kind of 4. waterproof coiled material tyre cloth high efficiency drying device according to claim 3, it is characterised in that the exhaust hood
（19）Cover mouth position at be also equipped with strainer.
A kind of 5. waterproof coiled material tyre cloth high efficiency drying device according to claim 4, it is characterised in that the fresh wind tube
（23）Nozzle position strainer is equally installed.
6. a kind of waterproof coiled material tyre cloth high efficiency drying device according to claim 5, it is characterised in that adjacent is described solid
Determine live-roller（10）Between and the adjacent movable drive roller（11）Between spacing it is adjustable.
A kind of 7. waterproof coiled material tyre cloth high efficiency drying device according to claim 6, it is characterised in that the heat pump（15）
Leaving air temp be adjusted by temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711107563.0A CN108007149A (en) | 2017-11-10 | 2017-11-10 | A kind of waterproof coiled material tyre cloth high efficiency drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711107563.0A CN108007149A (en) | 2017-11-10 | 2017-11-10 | A kind of waterproof coiled material tyre cloth high efficiency drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108007149A true CN108007149A (en) | 2018-05-08 |
Family
ID=62052327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711107563.0A Pending CN108007149A (en) | 2017-11-10 | 2017-11-10 | A kind of waterproof coiled material tyre cloth high efficiency drying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108007149A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006234A (en) * | 2019-05-14 | 2019-07-12 | 温州崇奥礼品有限公司 | Cloth drying device is used in a kind of processing of shoes and hats |
| CN111089470A (en) * | 2019-12-26 | 2020-05-01 | 杜秀兰 | Drying and shaping treatment process for production and processing of non-woven fabric |
| CN111238205A (en) * | 2020-01-09 | 2020-06-05 | 山东佳士博食品有限公司 | Drying-machine for food production |
| CN113720131A (en) * | 2021-08-04 | 2021-11-30 | 泉州科兴纺织有限公司 | Cotton cloth rolling drying equipment of cotton cloth production usefulness |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3240611A1 (en) * | 1981-11-06 | 1983-05-26 | Bachofen & Meier AG, 8180 Bülach | Process and apparatus for drying continuous lengths of material |
| CN205425752U (en) * | 2015-12-24 | 2016-08-03 | 上海岱鼎工业设备有限公司 | Heat pump dryer |
| CN107024097A (en) * | 2017-06-19 | 2017-08-08 | 长兴宝诺纺织科技有限公司 | One kind spinning drying baker |
| CN206387221U (en) * | 2017-01-17 | 2017-08-08 | 湖州紫琅衬布有限公司 | A kind of hot-air circulating drying device dried for lining cloth |
-
2017
- 2017-11-10 CN CN201711107563.0A patent/CN108007149A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3240611A1 (en) * | 1981-11-06 | 1983-05-26 | Bachofen & Meier AG, 8180 Bülach | Process and apparatus for drying continuous lengths of material |
| CN205425752U (en) * | 2015-12-24 | 2016-08-03 | 上海岱鼎工业设备有限公司 | Heat pump dryer |
| CN206387221U (en) * | 2017-01-17 | 2017-08-08 | 湖州紫琅衬布有限公司 | A kind of hot-air circulating drying device dried for lining cloth |
| CN107024097A (en) * | 2017-06-19 | 2017-08-08 | 长兴宝诺纺织科技有限公司 | One kind spinning drying baker |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006234A (en) * | 2019-05-14 | 2019-07-12 | 温州崇奥礼品有限公司 | Cloth drying device is used in a kind of processing of shoes and hats |
| CN111089470A (en) * | 2019-12-26 | 2020-05-01 | 杜秀兰 | Drying and shaping treatment process for production and processing of non-woven fabric |
| CN111089470B (en) * | 2019-12-26 | 2021-03-26 | 浙江互生非织造布有限公司 | Drying and shaping treatment process for production and processing of non-woven fabric |
| CN111238205A (en) * | 2020-01-09 | 2020-06-05 | 山东佳士博食品有限公司 | Drying-machine for food production |
| CN113720131A (en) * | 2021-08-04 | 2021-11-30 | 泉州科兴纺织有限公司 | Cotton cloth rolling drying equipment of cotton cloth production usefulness |
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Application publication date: 20180508 |