CN109759296B - Drying method and drying device for high-speed coating machine - Google Patents
Drying method and drying device for high-speed coating machine Download PDFInfo
- Publication number
- CN109759296B CN109759296B CN201910227958.7A CN201910227958A CN109759296B CN 109759296 B CN109759296 B CN 109759296B CN 201910227958 A CN201910227958 A CN 201910227958A CN 109759296 B CN109759296 B CN 109759296B
- Authority
- CN
- China
- Prior art keywords
- heating temperature
- section
- base band
- temperature zone
- drying
- 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.)
- Active
Links
- 238000001035 drying Methods 0.000 title claims abstract description 150
- 238000000576 coating method Methods 0.000 title claims abstract description 25
- 239000011248 coating agent Substances 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 395
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 54
- 239000002002 slurry Substances 0.000 claims description 11
- 230000000007 visual effect Effects 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000000052 comparative effect Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010304 firing Methods 0.000 description 3
- 101100327165 Arabidopsis thaliana CCD8 gene Proteins 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The invention belongs to the technical field of manufacturing of secondary batteries, and particularly relates to a drying method and a drying device for a high-speed coating machine. The base band after traction and coating of the traction steel band is subjected to infrared heating and then enters a drying section for drying, the drying section comprises six sections of heating temperature areas, the base band is sequentially dried through the six sections of heating temperature areas, a hot air heater and a blower are arranged on each section of heating temperature area, the blower blows air to the base band, the blowing directions of the blowers in different heating temperature areas are different, and induced draft fans are arranged in the second, third and fifth sections of heating temperature areas. The invention can obtain the dry baseband with excellent quality, the drying speed is faster, the baseband running speed is 2-3 times of that of the traditional method, the stability is stronger, and the problems of slow baseband running speed and baseband ignition caused by slow drying speed and poor stability in the prior art can be solved; the invention also provides a drying device.
Description
Technical Field
The invention belongs to the technical field of manufacturing of secondary batteries, and particularly relates to a drying method and a drying device for a high-speed coating machine.
Background
The base band is an important component of a pole piece used for a secondary battery, and is directly related to the quality of the battery. And the production of the base band needs to go through an important drying procedure, and the drying quality directly influences the quality of the base band and the production efficiency of the base band.
At present, the base band is dried by adopting a vertical mode to heat, and the heating modes mainly comprise hot air and infrared, wherein the hot air heating mode has the defects of simple device, low price and most application, but the swing of the battery slurry and the base band caused by the blowing flow of hot air always exists, so that the surface of the dried base band is uneven and the property is uneven, on the other hand, the dried base band is cracked due to hot air drying, the quality of the prepared base band is poor, and the heating efficiency is low. Patent CN106784601 a discloses a method for drying an electrode, which adopts a method of combining infrared rays, hot air and laser to heat, but because the laser is difficult to operate and has high risk, the running speed of the electrode is not high, the mass production is not facilitated, and the production quality of a power battery is not met.
In addition, the traditional drying mode also has the problems that the baseband is easy to fire and the baseband running speed is slow. In view of this, it is very necessary and urgent to develop a drying apparatus and a drying method having excellent drying characteristics.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a drying method for a high-speed coating machine, which can obtain a dry baseband with excellent quality, has higher drying speed, has the baseband running speed which is 2-3 times that of the traditional method, has higher stability, and can solve the problems of slow baseband running speed and baseband ignition caused by slow drying speed and poor stability in the prior art; the invention also provides a drying device.
According to the drying method for the high-speed coating machine, a base band subjected to traction coating of a traction steel band is subjected to infrared heating and then enters a drying section for drying, the drying section comprises six sections of heating temperature areas, the base band is sequentially dried through the six sections of heating temperature areas, a hot air heater and a blower are arranged on each section of heating temperature area, the blower blows air to the base band, induced draft fans are arranged in the second, third and fifth sections of heating temperature areas, the temperature of the first section of heating temperature area is 130-140 ℃, the temperature of the second section of heating temperature area is 132-145 ℃, the temperature of the third section of heating temperature area is 120-130 ℃, the temperature of the fourth section of heating temperature area is 100-110 ℃, the temperature of the fifth section of heating temperature area is 110-120 ℃, and the temperature of the sixth section of heating temperature area is 90-108 ℃.
Wherein:
the drying section comprises six sections of heating temperature areas, the temperatures of the six sections of heating temperature areas are different, the temperature of the first section of heating temperature area is 130-140 ℃, the temperature of the second section of heating temperature area is 132-145 ℃, the temperature of the third section of heating temperature area is 120-130 ℃, the temperature of the fourth section of heating temperature area is 100-110 ℃, the temperature of the fifth section of heating temperature area is 110-120 ℃, and the temperature of the sixth section of heating temperature area is 90-108 ℃. The base band is coated by a coating process, the coated base band is subjected to infrared heating by an infrared heating mechanism, and then enters a drying section for water volatilization and drying. If the heating temperature is increased, the corresponding baseband drying speed is high, the baseband travelling speed is also high, but the probability of baseband breakage is also increased, meanwhile, the probability of baseband ignition is also increased, the temperature is too high, and after the battery material is dried after the moisture is volatilized, spontaneous combustion is easy under certain hot air, commonly called ignition; if the heating temperature is low, the drying speed of the base band is low, the running speed of the base band is low, the production efficiency is reduced although the probability of breakage of the base band is low, and the surface of the base band is easy to crack, so that the quality of the base band is affected. Therefore, the temperature of each temperature zone needs to be correspondingly set by combining the factors of the influence of the water volatilization of the base band on the drying furnace, the base band running speed, the base band breakage risk, the base band ignition and the like. In the six-section heating temperature zone, the temperature of the second-section heating temperature zone is highest, the temperature of the first-section heating temperature zone is second highest, the temperature of the fifth-section heating temperature zone is higher than that of the fourth-section heating temperature zone, and the temperature of the sixth-section heating temperature zone is lowest. The temperature of the first section heating temperature zone is the second highest of the whole temperature zone, the infrared mechanism is used for preheating the inner part and the outer part of the base band, the temperature of the first section heating temperature zone is higher, the volatilization of the water content of the base band can be increased, but the base band is in operation, the heating time is limited, the volatilization of the water content needs a certain time, if the temperature is too high, the volatilization speed of the water content of the surface is higher than the water release speed in the base band, the surface of the base band is firstly dried, the surface of the base band is cracked, and the quality of the base band is affected; the second section heating temperature zone has the highest temperature, the moisture volatilization is concentrated in the second section heating temperature zone, the third section heating temperature zone is properly cooled, the baseband passes through the third section heating temperature zone and then goes out from the top, and enters the first temperature zone of the downlink section, namely the fourth section heating temperature zone, the temperature zone mainly plays a role in volatilizing moisture which does not exist in the baseband, the fifth section heating temperature zone is reinforced, the temperature is higher than that of the fourth section, the sixth section is reached, the baseband is basically dried, and the temperature is reduced in advance, so that the baseband is the lowest temperature zone of the whole heating zone.
Preferably, two blowers are arranged on each section of heating temperature zone and are arranged at two sides of the heating temperature zone to blow hot air to the base band to be dried.
Preferably, induced draft fans are arranged in the second, third and fifth sections of heating temperature areas, three induced draft fans are used for introducing dry air into the drying section and are linked with the blower, and hot air circulation is realized in the drying section. The blower blows dry air or hot air outside into the drying section, heats the drying section through the hot air heater, blows the drying section to the surface of the base band, and heats the base band through hot air; the induced draft fan is used for guiding out the air in the drying section and re-blowing the air into the drying furnace through the blower, so that the air flow speed in the drying furnace is increased, and the heating efficiency is improved. And an exhaust fan is arranged on the second section heating temperature zone of the drying section, the exhaust fan is hot air with overlarge humidity in the drying furnace and operates under the control of the control cabinet, when the humidity in the temperature zone is greater than 95% of the relative humidity content, the exhaust fan stops working, and the exhaust fan is only arranged in the second heating temperature zone and only one exhaust fan is arranged. The induced draft fans are respectively arranged in the second, third and fifth heating temperature areas, and the induced draft fans of the second and third heating temperature areas are linked with the blower of the second and fifth heating temperature areas, so as to increase the flow speed of hot air and improve the heating effect in unit time; the induced draft fan of the fifth section heating temperature zone is linked with the blower of the fourth section, so that the loss of hot air from the top baseband inlet through the earliest is avoided, meanwhile, the moisture of the baseband of the two sections is basically volatilized, only a small part of the moisture in the baseband needs to be volatilized, and the total humidity of the hot air of the two sections heating temperature zone is lower, therefore, the hot air can be recycled in the fourth section heating temperature zone and the fifth section heating temperature zone through the induced draft fan, and the heat is saved.
Preferably, in the six sections of heating temperature zones, the first three sections of heating temperature zones are connected in sequence, and the heights of the first section of heating temperature zone and the third section of heating temperature zone are increased in sequence; the third-section heating temperature zone is connected in sequence, the height from the fourth-section heating temperature zone to the sixth-section heating temperature zone is reduced in sequence, the first-section heating temperature zone and the third-section heating temperature zone are arranged in parallel, and a guide mechanism is arranged between the first-section heating temperature zone and the third-section heating temperature zone. After being heated by infrared rays, the coated base band is firstly heated by a first heating temperature zone, a second heating temperature zone and a third heating temperature zone, then is downwards heated by a fourth heating temperature zone, a fifth heating temperature zone and a sixth heating temperature zone under the action of a guiding mechanism.
The blowing directions of the blowers in different heating temperature zones are different, the blowers in the first section of heating temperature zone are vertical to the base band, the blowers in the second section of heating temperature zone and the third section of heating temperature zone form an upward 20-80-degree included angle with the base band, the blowers in the fourth section of heating temperature zone are vertical to the base band, the blowers in the fifth section of heating temperature zone form a downward 30-60-degree included angle with the base band, and the blowers in the sixth section of heating temperature zone form an upward 30-75-degree included angle with the base band. The battery slurry passing through the inner and outer sides of the base band of the first section heating temperature zone is tightly adhered by the adhesive and the glue, the slurry is in an unstable state, if wind is obliquely blown on the surface of the base band, the slurry flows, the surface of the base band is uneven, and the product quality is seriously affected, so that a blower in the first section heating temperature zone is vertical to the base band, and the blowing direction is vertical to the base band. After infrared heating and first section high temperature heating, the thick liquids moisture on baseband surface is volatilized basically, the surface is hardened, thick liquids have stabilized, but baseband self mechanical strength is not high, through self only mechanical strength improvement functioning speed, and the baseband rises the in-process, self gravity also can increase, the probability of breaking the area will increase, consequently, second section heating temperature district and third section heating temperature district are 20~80 degrees contained angles that form upwards with the baseband, hot-blast produces an ascending support power to the baseband, can eliminate the influence that the baseband rises in-process, thereby can improve baseband functioning speed and break the area, preferably, the hair-dryer forms ascending 60 degrees contained angles with the baseband in second section and the third section heating temperature district. The fourth section heating temperature zone is a heating cyclic utilization zone, if the heating cyclic utilization zone is used for blowing downwards at an included angle, a downward pulling force can be generated on the base band, the base band is suspended in the downward running process, the self gravity of the base band can also downwards run, the difficulty of controlling the base band to stably run can be increased, and if the base band is blown to the base band in the vertical direction. The fifth section of the base band is reduced by a lot, a downward included angle of 30-60 degrees is formed between the blower and the base band in the fifth section of the heating temperature zone, and the downward included angle is formed between the blower and the base band in the fifth section of the heating temperature zone mainly for the purpose of blowing hot air to the sixth section, so that the heating power of the sixth section is reduced, and preferably, the downward included angle is formed between the blower and the base band in the fifth section of the heating temperature zone; the blower and the base band in the sixth heating temperature zone form an upward included angle of 30-60 degrees, which is equal to applying a resistance to the base band, but the base band is not affected negatively, the main effect is to keep hot air between the fifth heating temperature zone and the sixth heating temperature zone, increase the circulation utilization times of the hot air, save energy consumption, and preferably, the blower and the base band in the sixth heating temperature zone form an upward included angle of 30 degrees.
The length of the first three sections of heating temperature areas is 1-3 m, and the length of the second three sections of heating temperature areas is 0.6-0.9 m. The drying section is designed according to the requirement, so that the difference of the maximum baseband width can be met, preferably, the baseband width is 500mm, the length of the heating temperature zone of the first three sections is 3m, and the length of the heating temperature zone of the second three sections is 0.9m; the width of the base band is less than 300mm, the length of the first three sections of heating temperature areas is 1m, and the length of the second three sections of heating temperature areas is 0.6m.
The base band speed is 1.8-4.1 m/min, preferably, the base band width is less than 200mm, the base band speed is 1.8m/min, the base band width is 500mm, and the base band speed is 4m/min.
The invention relates to a drying method for a high-speed coating machine, which comprises the following steps:
(1) Preparing a traction steel belt, passing through the drying section and connecting with the coated base band;
(2) Starting a hot air heater of the drying section to heat;
(3) When the temperature of each heating temperature zone reaches 90-110 ℃, starting the base band according to the starting speed of 0.8-1 m/min, synchronously linking the traction mechanism, driving the base band to enter the drying section by the steel belt, and moving to the next working procedure by the guide mechanism;
(4) After the base band stably runs, an infrared heating mechanism is started, the telescopic rod automatically descends the infrared heating mechanism, infrared heating is carried out near two sides of the base band, meanwhile, a vision device CCD starts to work, and the base band is monitored on line;
(5) The base band after traction and coating of the traction steel band is subjected to infrared heating firstly and then enters a drying section for drying, the drying section comprises six sections of heating temperature areas, the base band is sequentially dried through the six sections of heating temperature areas, and the temperature of the six sections of heating temperature areas is raised to the following set values: the temperature of the first section heating temperature zone is 130-140 ℃, the temperature of the second section heating temperature zone is 132-145 ℃, the temperature of the third section heating temperature zone is 120-130 ℃, the temperature of the fourth section heating temperature zone is 100-110 ℃, the temperature of the fifth section heating temperature zone is 110-120 ℃, and the temperature of the sixth section heating temperature zone is 90-108 ℃; at the same time, gradually increasing the speed of the basal belt to 1.8-4.1 m/min; each section of heating temperature zone is provided with a hot air heater and a blower, the blowers blow towards the base band, the blowing directions of the blowers in different heating temperature zones are different, the blowers in the first section of heating temperature zone are vertical to the base band, the blowers in the second section of heating temperature zone and the third section of heating temperature zone form an upward 20-80-degree included angle with the base band, the blowers in the fourth section of heating temperature zone are vertical to the base band, the blowers in the fifth section of heating temperature zone form a downward 30-60-degree included angle with the base band, and the blowers in the sixth section of heating temperature zone form an upward 30-75-degree included angle with the base band; induced draft fans are arranged in the second, third and fifth sections of heating temperature areas;
(6) When the slurry is nearly pulled, reducing the temperature of the first to fifth heating temperature areas to 90-110 ℃, keeping the temperature of the sixth heating temperature area unchanged, gradually reducing the speed of the base belt, and closing the infrared heating mechanism when the speed is lower than 1m/min;
(7) After the sizing agent is pulled out, cutting the base band, connecting a traction steel band, passing through the drying section through the base band so as to coat the base band next time, and repeating the steps (1) to (7).
The step (4) is as follows: after the base band stably runs, the infrared heating mechanism is started, the telescopic rod automatically descends, the telescopic rod stretches out 20-30 cm along the direction opposite to the trend of the base band, infrared heating is performed near two sides of the base band, meanwhile, the vision device CCD starts to work, and on-line monitoring is performed on the base band.
The exhaust fan does not continuously exhaust air, and the humidity sensor detects that the humidity is larger than a set value and then starts. In the base band operation process, when the base band running speed is more than or equal to 1m/min, if the humidity sensor detects that the humidity is more than 95% of the relative humidity content, the exhaust fan can be started and outwards extract hot air with high humidity, and after the humidity is lower than the set value by 95%, the exhaust fan 12 can automatically stop working.
The invention also provides a drying device for the high-speed coating machine, which comprises a control cabinet, an infrared heating mechanism and a drying section, wherein the infrared heating mechanism is arranged at the inlet of the drying section, a traction mechanism is arranged at the outlet of the drying section, the drying section comprises six sections of heating temperature areas, a hot air heater and a blower are arranged on each section of heating temperature area, induced draft fans are arranged in the second, third and fifth sections of heating temperature areas, and the infrared heating mechanism, the hot air heater, the blower and the induced draft fans are all connected with the control cabinet.
Wherein:
in the six sections of heating temperature zones, the first three sections of heating temperature zones are connected in sequence, and the heights of the first section of heating temperature zone and the third section of heating temperature zone are increased in sequence; the heating temperature areas of the rear three sections are sequentially connected, the heights of the heating temperature areas from the fourth section to the sixth section are sequentially reduced, the heating temperature areas of the front three sections and the rear three sections are mutually parallel, and a guide mechanism is arranged between the heating temperature areas of the front three sections and the rear three sections; and each section of heating temperature zone is provided with a blower, the blowing directions of the blowers in different heating temperature zones are different, the blowers in the first section of heating temperature zone are vertical to the base band, the blowers in the second section and the third section of heating temperature zone form an upward 20-80-degree included angle with the base band, the blowers in the fourth section of heating temperature zone are vertical to the base band, the blowers in the fifth section of heating temperature zone form a downward 30-60-degree included angle with the base band, and the blowers in the sixth section of heating temperature zone form an upward 30-60-degree included angle with the base band.
Two blowers are arranged on each section of heating temperature zone, and the blowers are connected with a control cabinet.
One section of the heating temperature zone of the drying section is provided with a speed sensor, each section of the heating temperature zone is provided with a temperature sensor, the second section of the heating temperature zone of the drying section is provided with an exhaust fan and a humidity sensor, and the speed sensor, the humidity sensor, the temperature sensor and the exhaust fan are all connected with a control cabinet. The infrared heating mechanism is connected to the frame at the inlet of the drying section through a telescopic rod, the visual device CCD is further arranged on the frame at the inlet of the drying section, and the infrared heating mechanism, the telescopic rod and the visual device CCD are all connected with the control cabinet. The infrared heating mechanism is arranged at the inlet of the drying section, namely below the heating temperature zone of the first section.
An operation screen, an alarm, an emergency button and a speed adjusting button are arranged on the control cabinet. The temperature, the wind speed and the baseband running speed of the drying section can be controlled, the functions of alarming and emergency stopping can be provided, and in addition, the temperature, the humidity and the speed values can be displayed.
The six sections of heating temperature zones are arranged in a left-right asymmetric mode, the temperature of each section of heating temperature zone is independently controlled, and each section of heating temperature zone is provided with a hot air heater.
The visual device CCD and the infrared heating mechanism are positioned below the inlet of the first section heating temperature zone, and after the visual device CCD monitors the stable running of the base band, the telescopic rod stretches out 20-30 cm along the direction opposite to the trend of the base band, and infrared heating is carried out on the base band.
The speed sensor is linked with the hot air heater, the speed sensor transmits a signal to the control cabinet, the control cabinet sends an instruction to stop the hot air heater to heat or maintain heating power according to a program setting program, and the alarm gives an alarm. The specific procedure is as follows: when the running speed of the base band is more than or equal to 1m/min, if the coated base band suddenly drops or stops, the speed sensor provides a signal control cabinet, the control cabinet sends instructions to the hot air heaters in all temperature areas, and the drying sections stop heating and alarm at the same time. When the coating speed is less than 1m/min, the speed sensor does not work, and manual control is performed according to the running condition.
In summary, the invention has the following advantages:
(1) According to the drying method for the high-speed coating machine, an infrared-hot air combined drying mode is adopted, and the drying baseband with excellent quality is obtained through linkage of temperature, an exhaust fan, an induced draft fan, a blower and the traveling speed of the baseband, so that the drying speed of the method is higher, the traveling speed of the baseband is 2-3 times that of the traditional method, the stability is higher, and the problems of slow traveling speed of the baseband and ignition of the baseband caused by low drying speed and poor stability in the prior art can be solved.
(2) The dried base band has excellent quality, completely meets the quality requirement of the power battery, greatly improves the yield and reduces the production cost.
(3) The invention also provides a drying device which is easy to operate, a drying baseband with excellent quality is obtained, the components are controlled by the control cabinet, the integration of heating, air suction, speed, humidity and speed can be realized, the whole process control cabinet automatically controls the drying section, the production efficiency is improved, the manpower is saved, and the continuous production is realized.
Drawings
Fig. 1 is a schematic view showing the structure of a drying apparatus for a high-speed coater according to an embodiment of the present invention;
in the figure: 1-control cabinet, 2-infrared heating mechanism, 3-guiding mechanism, 4-operation screen, 5-alarm, 6-emergency button, 7-speed adjustment button, 8-vision device CCD, 9-telescopic link, 10-hot air heater, 11-hair-dryer, 12-air exhauster, 13-draught fan, 14-speed sensor, 15-humidity transducer, 16-temperature sensor, 17-traction mechanism.
Detailed Description
The invention is further illustrated below with reference to examples.
Example 1
A drying method for a high-speed coating machine comprises the following steps:
(1) Preparing a traction steel belt, passing through the drying section and connecting with the coated base band;
(2) Starting a hot air heater of the drying section to heat;
(3) When the temperature of each heating temperature zone reaches 100+/-5 ℃, starting the base band according to the starting speed of 1m/min, driving the base band to enter a drying section by a steel belt, and moving to the next working procedure by a guide mechanism;
(4) After the base band stably runs, an infrared heating mechanism is started, the telescopic rod automatically descends the infrared heating mechanism, infrared heating is carried out near two sides of the base band, meanwhile, a vision device CCD starts to work, and the base band is monitored on line;
(5) The base band after traction and coating of the traction steel band is subjected to infrared heating firstly and then enters a drying section for drying, the drying section comprises six sections of heating temperature areas, the base band is sequentially dried through the six sections of heating temperature areas, and the temperature of the six sections of heating temperature areas is raised to the following set values: the temperature of the first section heating temperature zone is 135 ℃, the temperature of the second section heating temperature zone is 138 ℃, the temperature of the third section heating temperature zone is 125 ℃, the temperature of the fourth section heating temperature zone is 105 ℃, the temperature of the fifth section heating temperature zone is 118 ℃, and the temperature of the sixth section heating temperature zone is 98 ℃; at the same time, gradually increasing the speed of the basal belt to 4m/min; each section of heating temperature zone is provided with a hot air heater and a blower, the blowers blow towards the base band, the blowing directions of the blowers in different heating temperature zones are different, the blowers in the first section of heating temperature zone are vertical to the base band, the blowers in the second section of heating temperature zone and the third section of heating temperature zone form an upward 75-degree included angle with the base band, the blowers in the fourth section of heating temperature zone are vertical to the base band, the blowers in the fifth section of heating temperature zone form a downward 55-degree included angle with the base band, and the blowers in the sixth section of heating temperature zone form an upward 50-degree included angle with the base band; induced draft fans are arranged in the second, third and fifth sections of heating temperature areas; the width of the base band is 500mm, the length of the first three sections of heating temperature areas is 3m, and the length of the second three sections of heating temperature areas is 0.9m;
(6) When the slurry is nearly pulled, the temperature of the first to fifth heating temperature areas is reduced to 100+/-5 ℃, the temperature of the sixth heating temperature area is kept unchanged, the speed of the base belt is gradually reduced, and the infrared heating mechanism is turned off after the speed is lower than 1m/min; and an exhaust fan is arranged on the second section heating temperature zone of the drying section, and when the humidity in the temperature zone is greater than the relative humidity content of 95%, the exhaust fan is used for exhausting air outwards.
(7) After the sizing agent is pulled out, cutting the base band, connecting a traction steel band, passing through the drying section through the base band so as to coat the base band next time, and repeating the steps (1) to (7).
The adopted drying device for the high-speed coating machine comprises a control cabinet 1, an infrared heating mechanism 2 and a drying section, wherein the infrared heating mechanism 2 is arranged at the inlet of the drying section, a traction mechanism 17 is arranged at the outlet of the drying section, the drying section comprises six heating temperature areas, a hot air heater 10 and a blower 11 are arranged on each heating temperature area, induced draft fans 13 are arranged in the second, third and fifth heating temperature areas, and the infrared heating mechanism 2, the hot air heater 10, the blower 11 and the induced draft fans 13 are all connected with the control cabinet 1.
In the six sections of heating temperature zones, the first three sections of heating temperature zones are connected in sequence, and the heights of the first section of heating temperature zone and the third section of heating temperature zone are increased in sequence; the heating temperature areas of the rear three sections are sequentially connected, the heights of the heating temperature areas from the fourth section to the sixth section are sequentially reduced, the heating temperature areas of the front three sections and the rear three sections are mutually parallel, and a guide mechanism 3 is arranged between the heating temperature areas of the front three sections and the rear three sections; the blower 11 is arranged on each section of heating temperature zone, the blowing directions of the blowers 11 in different heating temperature zones are different, the blower 11 in the first section of heating temperature zone is vertical to the base band, the blower 11 in the second section of heating temperature zone and the blower 11 in the third section of heating temperature zone form an upward 60-degree included angle with the base band, the blower 11 in the fourth section of heating temperature zone is vertical to the base band, the blower 11 in the fifth section of heating temperature zone forms a downward 45-degree included angle with the base band, and the blower 11 in the sixth section of heating temperature zone forms an upward 30-degree included angle with the base band.
Two blowers 11 are arranged on each section of heating temperature zone, and the blowers 11 are connected with the control cabinet 1; a speed sensor 14 is arranged on one section of heating temperature zone of the drying section, a temperature sensor 16 is arranged on each section of heating temperature zone, an exhaust fan 12 and a humidity sensor 15 are arranged on the second section of heating temperature zone of the drying section, and the speed sensor 14, the humidity sensor 15, the temperature sensor 16 and the exhaust fan 12 are all connected with the control cabinet 1; the infrared heating mechanism 2 is connected to a frame at the inlet of the drying section through a telescopic rod 9, a visual device CCD8 is further arranged on the frame at the inlet of the drying section, and the infrared heating mechanism 2, the telescopic rod 9 and the visual device CCD8 are all connected with the control cabinet 1; the control cabinet 1 is provided with an operation screen 4, an alarm 5, an emergency button 6 and a speed adjusting button 7.
Through the above operation parameters, the stable operation speed of the base band reaches 3m/min, the breakage rate of the base band is 0, the fire probability is 0, and the quality of the base band reaches an excellent grade.
Example 2
A drying method for a high-speed coating machine comprises the following steps:
(1) Preparing a traction steel belt, passing through the drying section and connecting with the coated base band;
(2) Starting a hot air heater of the drying section to heat;
(3) When the temperature of each heating temperature zone reaches 95+/-5 ℃, starting the base band according to the starting speed of 0.8m/min, driving the base band to enter a drying section by a steel belt, and moving to the next working procedure by a guide mechanism;
(4) After the base band stably runs, an infrared heating mechanism is started, the telescopic rod automatically descends the infrared heating mechanism, infrared heating is carried out near two sides of the base band, meanwhile, a vision device CCD starts to work, and the base band is monitored on line;
(5) The base band after traction and coating of the traction steel band is subjected to infrared heating firstly and then enters a drying section for drying, the drying section comprises six sections of heating temperature areas, the base band is sequentially dried through the six sections of heating temperature areas, and the temperature of the six sections of heating temperature areas is raised to the following set values: the temperature of the first section heating temperature zone is 140 ℃, the temperature of the second section heating temperature zone is 142 ℃, the temperature of the third section heating temperature zone is 130 ℃, the temperature of the fourth section heating temperature zone is 105 ℃, the temperature of the fifth section heating temperature zone is 115 ℃, and the temperature of the sixth section heating temperature zone is 100 ℃; at the same time, gradually increasing the speed of the basal belt to 3.5m/min; each section of heating temperature zone is provided with a hot air heater and a blower, the blowers blow towards the base band, the blowing directions of the blowers in different heating temperature zones are different, the blowers in the first section of heating temperature zone are vertical to the base band, the blowers in the second section of heating temperature zone and the third section of heating temperature zone form an upward 40-degree included angle with the base band, the blowers in the fourth section of heating temperature zone are vertical to the base band, the blowers in the fifth section of heating temperature zone form a downward 35-degree included angle with the base band, and the blowers in the sixth section of heating temperature zone form an upward 40-degree included angle with the base band; induced draft fans are arranged in the second, third and fifth sections of heating temperature areas; the width of the base band is 400mm, the length of the first three sections of heating temperature areas is 2m, and the length of the second three sections of heating temperature areas is 0.75m;
(6) When the slurry is nearly pulled, the temperature of the first to fifth heating temperature areas is reduced to 95+/-5 ℃, the temperature of the sixth heating temperature area is kept unchanged, the speed of the base belt is gradually reduced, and the infrared heating mechanism is turned off after the speed is lower than 1m/min; and an exhaust fan is arranged on the second section heating temperature zone of the drying section, and when the humidity in the temperature zone is greater than the relative humidity content of 95%, the exhaust fan is used for exhausting air outwards.
(7) After the sizing agent is pulled out, cutting the base band, connecting a traction steel band, passing through the drying section through the base band so as to coat the base band next time, and repeating the steps (1) to (7).
The structure of the drying device for the high-speed coater used was the same as that of example 1, and the only difference was that: the blower in the second section and the third section of heating temperature zone forms an upward 40-degree included angle with the base band, the blower in the fifth section of heating temperature zone forms a downward 35-degree included angle with the base band, and the blower in the sixth section of heating temperature zone forms an upward 40-degree included angle with the base band.
Through the above operation parameters, the stable operation speed of the base band reaches 2.5m/min, the breakage rate of the base band is 0, the firing probability is 0, and the quality of the base band reaches an excellent grade.
Example 3
A drying method for a high-speed coating machine comprises the following steps:
(1) Preparing a traction steel belt, passing through the drying section and connecting with the coated base band;
(2) Starting a hot air heater of the drying section to heat;
(3) When the temperature of each heating temperature zone reaches 105+/-5 ℃, starting the base band according to the starting speed of 0.9m/min, driving the base band to enter a drying section by a steel belt, and moving to the next working procedure by a guide mechanism;
(4) After the base band stably runs, an infrared heating mechanism is started, the telescopic rod automatically descends the infrared heating mechanism, infrared heating is carried out near two sides of the base band, meanwhile, a vision device CCD starts to work, and the base band is monitored on line;
(5) The base band after traction and coating of the traction steel band is subjected to infrared heating firstly and then enters a drying section for drying, the drying section comprises six sections of heating temperature areas, the base band is sequentially dried through the six sections of heating temperature areas, and the temperature of the six sections of heating temperature areas is raised to the following set values: the temperature of the first section heating temperature zone is 140 ℃, the temperature of the second section heating temperature zone is 142 ℃, the temperature of the third section heating temperature zone is 130 ℃, the temperature of the fourth section heating temperature zone is 107 ℃, the temperature of the fifth section heating temperature zone is 115 ℃, and the temperature of the sixth section heating temperature zone is 102 ℃; at the same time, gradually increasing the speed of the basal belt to 3.0m/min; each section of heating temperature zone is provided with a hot air heater and a blower, the blowers blow towards the base band, the blowing directions of the blowers in different heating temperature zones are different, the blowers in the first section of heating temperature zone are vertical to the base band, the blowers in the second section of heating temperature zone and the third section of heating temperature zone form an upward 60-degree included angle with the base band, the blowers in the fourth section of heating temperature zone are vertical to the base band, the blowers in the fifth section of heating temperature zone form a downward 45-degree included angle with the base band, and the blowers in the sixth section of heating temperature zone form an upward 30-degree included angle with the base band; induced draft fans are arranged in the second, third and fifth sections of heating temperature areas; the width of the base band is 280mm, the length of the first three sections of heating temperature areas is 1m, and the length of the second three sections of heating temperature areas is 0.6m.
(6) When the slurry is nearly pulled, the temperature of the first to fifth heating temperature areas is reduced to 105+/-5 ℃, the temperature of the sixth heating temperature area is kept unchanged, the speed of the base belt is gradually reduced, and the infrared heating mechanism is turned off after the speed is lower than 1m/min; and an exhaust fan is arranged on the second section heating temperature zone of the drying section, and when the humidity in the temperature zone is greater than the relative humidity content of 95%, the exhaust fan is used for exhausting air outwards.
(7) After the sizing agent is pulled out, cutting the base band, connecting a traction steel band, passing through the drying section through the base band so as to coat the base band next time, and repeating the steps (1) to (7).
The structure of the drying device for the high-speed coater used was the same as that of example 1, and the only difference was that: the blower in the second section and the third section of heating temperature zone forms an upward 75-degree included angle with the base band, the blower in the fifth section of heating temperature zone forms a downward 55-degree included angle with the base band, and the blower in the sixth section of heating temperature zone forms an upward 50-degree included angle with the base band.
Through the above operation parameters, the stable operation speed of the base band reaches 4.1m/min, the breakage rate of the base band is 0, the firing probability is 0, and the quality of the base band reaches an excellent grade.
Comparative example 1
The drying method and apparatus for the high-speed coater used were the same as those of example 1, the only difference being that: the temperature of the heating temperature zone of the first stage in the step (5) is 150 ℃.
After the drying method and the drying device in comparative example 1 are used for drying, the stable running speed of the base band reaches 1.8m/min, the breakage rate of the base band is 0, the firing probability is 5%, cracks and even cracks appear on the surface of the base band, and the quality is unqualified.
Comparative example 2
The drying method and apparatus for the high-speed coater used were the same as those of example 1, the only difference being that: in the step (5), the blower in the first heating temperature zone forms an upward 60-degree included angle with the base band.
After the drying method and the drying device in comparative example 2 are used for drying, the slurry on the base band flows, so that the surface of the base band is uneven, and the product quality is seriously affected.
Comparative example 3
The drying method and apparatus for the high-speed coater used were the same as those of example 1, the only difference being that: in the step (5), the blower 11 in the second and third heating temperature zones forms a downward 60-degree included angle with the base band.
The base band speed of the operation of the comparative example 3 is only 0.8m/min, and the slurry on the base band flows after the base band is dried, so that the surface of the base band is uneven, and the product quality is seriously affected.
Comparative example 4
The drying method and apparatus for the high-speed coater used were the same as those of example 1, the only difference being that: in the second and third heating temperature zones in the step (5), the blower 11 is not arranged.
The speed of the base band in the operation of comparative example 4 is only 1.0m/min, the surface of the base band cannot be dried, and the base band can deform in the subsequent rolling process, so that the base band is directly scrapped.
Claims (6)
1. A drying method for a high-speed coating machine is characterized in that: the base band after traction coating of the traction steel band is subjected to infrared heating and then enters a drying section for drying, the drying section comprises six sections of heating temperature areas, the base band is sequentially dried through the six sections of heating temperature areas, a hot air heater and a blower are arranged on each section of heating temperature area, the blower blows air to the base band, induced draft fans are arranged in the second, third and fifth sections of heating temperature areas, the temperature of the first section of heating temperature area is 130-140 ℃, the temperature of the second section of heating temperature area is 132-145 ℃, the temperature of the third section of heating temperature area is 120-130 ℃, the temperature of the fourth section of heating temperature area is 100-110 ℃, the temperature of the fifth section of heating temperature area is 110-120 ℃, and the temperature of the sixth section of heating temperature area is 90-108 ℃;
in the six sections of heating temperature zones, the first three sections of heating temperature zones are connected in sequence, and the heights of the first section of heating temperature zone and the third section of heating temperature zone are increased in sequence; the heating temperature areas of the rear three sections are sequentially connected, the heights of the heating temperature areas from the fourth section to the sixth section are sequentially reduced, the heating temperature areas of the front three sections and the rear three sections are mutually parallel, and a guide mechanism is arranged between the heating temperature areas of the front three sections and the rear three sections; after the coated base band is heated by infrared rays, the base band firstly moves upwards and sequentially passes through a first heating temperature zone, a second heating temperature zone and a third heating temperature zone for heating, then moves downwards under the action of a guide mechanism and sequentially passes through a fourth heating temperature zone, a fifth heating temperature zone and a sixth heating temperature zone for heating;
the air blowers are arranged on each section of heating temperature zone, the air blowing directions of the air blowers in different heating temperature zones are different, the air blowers in the first section of heating temperature zone are vertical to the base band, the air blowers in the second section and the third section of heating temperature zone form an upward 20-80-degree included angle with the base band, the air blowers in the fourth section of heating temperature zone are vertical to the base band, the air blowers in the fifth section of heating temperature zone form a downward 30-60-degree included angle with the base band, and the air blowers in the sixth section of heating temperature zone form an upward 30-60-degree included angle with the base band;
in the six-section heating temperature zone, the temperature of the second-section heating temperature zone is highest, the temperature of the first-section heating temperature zone is second highest, the temperature of the fifth-section heating temperature zone is higher than that of the fourth-section heating temperature zone, and the temperature of the sixth-section heating temperature zone is lowest.
2. The drying method for a high-speed coater according to claim 1, wherein: the length of the first three sections of heating temperature areas is 1-3 m, and the length of the second three sections of heating temperature areas is 0.6-0.9 m; the speed of the substrate is 1.8-4.1 m/min.
3. The drying method for a high-speed coater according to claim 1, wherein: and an exhaust fan is arranged on the second section heating temperature zone of the drying section, and when the humidity in the temperature zone is greater than the relative humidity content of 95%, the exhaust fan is used for exhausting air outwards.
4. A drying method for a high-speed coater according to any one of claims 1 to 3, wherein: the method comprises the following steps:
(1) Preparing a traction steel belt, passing through the drying section and connecting with the coated base band;
(2) Starting a hot air heater of the drying section to heat;
(3) When the temperature of each heating temperature zone reaches 90-110 ℃, starting the base band according to the starting speed of 0.8-1 m/min, driving the base band to enter a drying section by a steel belt, and moving to the next working procedure by a guide mechanism;
(4) After the base band stably runs, an infrared heating mechanism is started, the telescopic rod automatically descends the infrared heating mechanism, infrared heating is carried out near two sides of the base band, meanwhile, a vision device CCD starts to work, and the base band is monitored on line;
(5) The base band after traction and coating of the traction steel band is subjected to infrared heating firstly and then enters a drying section for drying, the drying section comprises six sections of heating temperature areas, the base band is sequentially dried through the six sections of heating temperature areas, and the temperature of the six sections of heating temperature areas is raised to the following set values: the temperature of the first section heating temperature zone is 130-140 ℃, the temperature of the second section heating temperature zone is 132-145 ℃, the temperature of the third section heating temperature zone is 120-130 ℃, the temperature of the fourth section heating temperature zone is 100-110 ℃, the temperature of the fifth section heating temperature zone is 110-120 ℃, and the temperature of the sixth section heating temperature zone is 90-108 ℃; at the same time, gradually increasing the speed of the base belt to 1.8-4.1 m/min; each section of heating temperature zone is provided with a hot air heater and a blower, the blowers blow towards the base band, the blowing directions of the blowers in different heating temperature zones are different, the blowers in the first section of heating temperature zone are vertical to the base band, the blowers in the second section of heating temperature zone and the third section of heating temperature zone form an upward 20-80-degree included angle with the base band, the blowers in the fourth section of heating temperature zone are vertical to the base band, the blowers in the fifth section of heating temperature zone form a downward 30-60-degree included angle with the base band, and the blowers in the sixth section of heating temperature zone form an upward 30-60-degree included angle with the base band; induced draft fans are arranged in the second, third and fifth sections of heating temperature areas;
(6) When the slurry is nearly pulled out, reducing the temperature of the first to fifth sections of heating temperature areas to 90-110 ℃, keeping the temperature of the sixth section of heating temperature areas unchanged, gradually reducing the speed of the base belt, and closing the infrared heating mechanism when the speed is lower than 1m/min;
(7) After the sizing agent is pulled out, cutting the base band, connecting a traction steel band, passing through the drying section through the base band so as to coat the base band next time, and repeating the steps (1) to (7).
5. A drying device for high-speed coating machine, its characterized in that: the automatic drying device comprises a control cabinet (1), an infrared heating mechanism (2) and a drying section, wherein the infrared heating mechanism (2) is arranged at the inlet of the drying section, a traction mechanism (17) is arranged at the outlet of the drying section, the drying section comprises six sections of heating temperature areas, a hot air heater (10) and a blower (11) are arranged on each section of heating temperature area, induced draft fans (13) are arranged in the second, third and fifth sections of heating temperature areas, and the infrared heating mechanism (2), the hot air heater (10), the blower (11) and the induced draft fans (13) are all connected with the control cabinet (1);
in the six sections of heating temperature zones, the first three sections of heating temperature zones are connected in sequence, and the heights of the first section of heating temperature zone and the third section of heating temperature zone are increased in sequence; the heating temperature areas of the rear three sections are sequentially connected, the heights of the heating temperature areas from the fourth section to the sixth section are sequentially reduced, the heating temperature areas of the front three sections and the rear three sections are mutually parallel, and a guide mechanism (3) is arranged between the heating temperature areas of the front three sections and the rear three sections; the air blowers (11) are arranged on each section of heating temperature zone, the air blowing directions of the air blowers (11) in different heating temperature zones are different, the air blowers (11) in the first section of heating temperature zone are vertical to the base band, the air blowers (11) in the second section and the third section of heating temperature zone form an upward 20-80-degree included angle with the base band, the air blowers (11) in the fourth section of heating temperature zone are vertical to the base band, the air blowers (11) in the fifth section of heating temperature zone form a downward 30-60-degree included angle with the base band, and the air blowers (11) in the sixth section of heating temperature zone form an upward 30-60-degree included angle with the base band;
two blowers (11) are arranged on each section of heating temperature zone, and the blowers (11) are connected with the control cabinet (1); one section of the drying section is provided with a speed sensor (14), each section of the drying section is provided with a temperature sensor (16), the second section of the drying section is provided with an exhaust fan (12) and a humidity sensor (15), and the speed sensor (14), the humidity sensor (15), the temperature sensor (16) and the exhaust fan (12) are all connected with the control cabinet (1).
6. The drying apparatus for a high-speed coater according to claim 5, wherein: the infrared heating mechanism (2) is connected to the frame at the inlet of the drying section through the telescopic rod (9), the visual device CCD (8) is further arranged on the frame at the inlet of the drying section, and the infrared heating mechanism (2), the telescopic rod (9) and the visual device CCD (8) are all connected with the control cabinet (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910227958.7A CN109759296B (en) | 2019-03-25 | 2019-03-25 | Drying method and drying device for high-speed coating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910227958.7A CN109759296B (en) | 2019-03-25 | 2019-03-25 | Drying method and drying device for high-speed coating machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109759296A CN109759296A (en) | 2019-05-17 |
| CN109759296B true CN109759296B (en) | 2024-02-09 |
Family
ID=66458647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910227958.7A Active CN109759296B (en) | 2019-03-25 | 2019-03-25 | Drying method and drying device for high-speed coating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109759296B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024044902A1 (en) * | 2022-08-29 | 2024-03-07 | 宁德时代新能源科技股份有限公司 | Drying apparatus and electrode sheet manufacturing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104588262A (en) * | 2013-10-30 | 2015-05-06 | 天津力好科技发展有限公司 | Coater for diaphragm coating |
| CN208390371U (en) * | 2018-05-15 | 2019-01-18 | 江西中汽瑞华新能源科技有限公司 | A kind of coating fast-drying device |
| CN209735981U (en) * | 2019-03-25 | 2019-12-06 | 包头昊明稀土新电源科技有限公司 | Drying device for high-speed coating machine |
-
2019
- 2019-03-25 CN CN201910227958.7A patent/CN109759296B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104588262A (en) * | 2013-10-30 | 2015-05-06 | 天津力好科技发展有限公司 | Coater for diaphragm coating |
| CN208390371U (en) * | 2018-05-15 | 2019-01-18 | 江西中汽瑞华新能源科技有限公司 | A kind of coating fast-drying device |
| CN209735981U (en) * | 2019-03-25 | 2019-12-06 | 包头昊明稀土新电源科技有限公司 | Drying device for high-speed coating machine |
Non-Patent Citations (1)
| Title |
|---|
| 高久顺.塑料凹印机的使用与调节.印刷工业出版社,1993,(第1版),第113页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109759296A (en) | 2019-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109759296B (en) | Drying method and drying device for high-speed coating machine | |
| CN106948117A (en) | Fabric heat-setting intelligent control method and the forming machine using this method | |
| CN106977084A (en) | Devitrified glass hot bending crystallization continuous tunnel furnace and its method for producing crystallized glass article | |
| CN204115399U (en) | A kind of associating dehumidifying drying equipment | |
| CN209735981U (en) | Drying device for high-speed coating machine | |
| CN104310764B (en) | Continuous bending furnace | |
| CN204281557U (en) | A kind of glass annealing crystallization all-in-one oven | |
| CN104746156A (en) | High-efficiency and energy-saving fiber drying device and method | |
| CN206787245U (en) | A kind of glassware drying plant | |
| CN204509106U (en) | A kind of Novel photovoltaic anti-reflective glass annealing furnace | |
| CN102730951B (en) | Special glass tempering furnace for ultrathin tempered glass production line, and heating method thereof | |
| CN202945275U (en) | Mesh belt type hot air circulation tempering furnace | |
| CN207002576U (en) | A kind of glass tempering cooling system | |
| CN206799427U (en) | Devitrified glass hot bending crystallization continuous tunnel furnace | |
| CN206897771U (en) | A kind of vertical spraying curing oven | |
| EA025306B1 (en) | Method for starting a sintering furnace, and sintering equipment | |
| CN104310765B (en) | A kind of method of glass bent through baking plate continuous in continuous bending furnace | |
| CN208733384U (en) | A kind of low-temperature thermal insulation paper drying forming all-in-one machine | |
| CN106517317A (en) | Lead tetraoxide oxidation technology | |
| CN208789102U (en) | A kind of automotive interior material increasing gas equipment complex | |
| CN203923682U (en) | A kind of hot blast drying oven of stenter setting machine structure | |
| CN208779878U (en) | It is a kind of for making the low temp drying oven of solar cell wafer | |
| CN206235115U (en) | A kind of energy-saving heating apparatus for lining cloth processing | |
| CN101597866B (en) | Dipping pre-curing production equipment for braided fiber cloth tapes | |
| CN207365570U (en) | A kind of waste heat ramp-down device for improving mosquito-repellent incense quality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |