CN116408962B - Polyimide film processing device and control method thereof - Google Patents
Polyimide film processing device and control method thereof Download PDFInfo
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- CN116408962B CN116408962B CN202310684522.7A CN202310684522A CN116408962B CN 116408962 B CN116408962 B CN 116408962B CN 202310684522 A CN202310684522 A CN 202310684522A CN 116408962 B CN116408962 B CN 116408962B
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- 229920001721 polyimide Polymers 0.000 title claims abstract description 222
- 238000012545 processing Methods 0.000 title claims abstract description 208
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 50
- 239000000523 sample Substances 0.000 claims description 26
- 238000004364 calculation method Methods 0.000 claims description 18
- 239000000428 dust Substances 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/08—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0288—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/06—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam for articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C2035/0283—Thermal pretreatment of the plastics material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2079/00—Use of polymers having nitrogen, with or without oxygen or carbon only, in the main chain, not provided for in groups B29K2061/00 - B29K2077/00, as moulding material
- B29K2079/08—PI, i.e. polyimides or derivatives thereof
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The application provides a polyimide film processing device and a control method thereof, belongs to the technical field of polyimide film processing, and is used for solving the problem of low polyimide film forming rate. The processing device comprises a processing chamber, two groups of conveying rollers, two groups of stretching rollers, a hot air heating mechanism, an acquisition module and a control module; the acquisition module is used for acquiring film temperature data of a part of polyimide film in the processing chamber, top temperature data of the top in the processing chamber, hot air temperature data of the bottom in the processing chamber and hot air speed data; the control module calculates the highest temperature of the polyimide film in a preset time period according to the top temperature data, the hot air temperature data and the film temperature data, calculates the thinnest thickness of the polyimide film in the preset time period according to a stretching control scheme, judges the maximum wind pressure which can be born by the polyimide film according to the highest temperature and the thinnest thickness, and alarms when the actual wind pressure exceeds the calculated maximum wind pressure so as to ensure the film forming rate.
Description
Technical Field
The application relates to the technical field of polyimide film processing, in particular to a polyimide film processing device and a polyimide film control method.
Background
The polyimide film is an insulating material for high temperature resistant motor and electric appliances. The processing of polyimide film includes transverse stretching, in which the polyimide film is heated.
The related art provides a processing device of polyimide film, it includes the processing chamber, be used for carrying polyimide film through the two sets of transfer rollers of processing chamber, be used for transversely stretching polyimide film's two sets of stretching rollers and be used for carrying out the hot-blast heating mechanism of heating to polyimide film in the processing chamber, hot-blast heating mechanism can heat the partial polyimide film in the processing chamber, make polyimide film intensification and deformation easily, then make polyimide film can transversely stretch under the effect of stretching roller.
The polyimide film in the processing chamber, particularly the polyimide film after transverse stretching, is thinner and is easier to deform, and the polyimide film in the processing chamber is easy to deform abnormally due to the air flow heated by hot air, so that the film forming rate of the polyimide film is influenced.
Disclosure of Invention
The application provides a polyimide film processing device and a control method thereof, which are beneficial to improving the film forming rate of a polyimide film.
In a first aspect, the present application provides a processing apparatus for a polyimide film. The device comprises a processing chamber, two groups of conveying rollers, two groups of stretching rollers, a hot air heating mechanism, an acquisition module and a control module;
the two groups of conveying rollers are used for horizontally conveying the polyimide film to pass through the inner top of the processing chamber, the two groups of stretching rollers are used for transversely stretching part of the polyimide film in the processing chamber, and the hot air heating mechanism is used for forming vertical upward hot air at the inner bottom of the processing chamber; the acquisition module is used for acquiring film temperature data of a part of polyimide film in the processing chamber, top temperature data of the top in the processing chamber, hot air temperature data of the bottom in the processing chamber and hot air speed data; the control module is connected with the acquisition module to receive the film temperature data, the top temperature data, the hot air temperature data and the hot air speed data;
the control module is configured to: during the transverse stretching of a polyimide film of a predetermined length,
Estimating the highest temperature data of the polyimide film within a preset time period according to the acquired top temperature data, hot air temperature data, film temperature data, a pre-acquired stretching control scheme and a processing stage of the stretching control scheme at the current moment;
estimating minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and initial thickness data of the polyimide film;
substituting the highest temperature data and the minimum thickness data into a pre-trained bearing capacity calculation model to generate wind speed upper limit data, wherein the bearing capacity calculation model is trained based on big data and is used for calculating the highest wind speed which can be borne by a polyimide film with a certain temperature and a certain thickness;
judging whether the hot air speed data is higher than the highest air speed data, and if so, generating alarm information.
Through adopting above-mentioned technical scheme, this processingequipment can be according to polyimide film's temperature and thickness, and reasonable estimation polyimide film can bear how big wind pressure and do not appear unusual deformation or damage, judges whether hot-blast heating mechanism can cause polyimide film's unusual deformation or damage to polyimide film's wind pressure that the polyimide film caused then, in time reports to the police when hot-blast easy damage polyimide film of hot-blast heating mechanism, is favorable to guaranteeing polyimide film's film forming rate after handling in time to the warning.
Further, the control module is further configured to:
determining the stretching stop time according to the pre-acquired stretching control scheme and the processing stage of the current time in the stretching control scheme;
judging whether the stretching stop time is within the preset time length of the current time, if so, taking the stretching stop time as the maximum time, and if not, taking the time of the preset time length from the current time as the maximum time;
estimating the expected top temperature of the top of the processing chamber at the most value moment according to hot air temperature data, top temperature data and a pre-trained top-bottom heat exchange model, wherein the top-bottom heat exchange model is pre-trained based on big data and is used for reflecting the change of the top temperature after the top heat exchange unit time and the bottom heat exchange unit time of the processing chamber;
estimating the expected film temperature of the polyimide film at the most value moment according to the top temperature data, the estimated temperature data, the film temperature data and a pre-trained top film heat exchange model, wherein the top film heat exchange model is trained based on big data and is used for calculating the temperature change of the polyimide film after the top of the processing chamber and the polyimide film heat exchange unit time;
Taking the predicted film temperature as the highest temperature data;
and
based on the pre-obtained stretching control scheme and initial thickness data of the polyimide film, estimating the thickness data of the polyimide film at the most value moment as the minimum thickness data according to the processing stage of the stretching control scheme at the current moment.
Further, the control module is also connected with the hot air heating mechanism and used for controlling the on-off of the hot air heating mechanism;
the control module is further configured to: when the alarm information is generated, the hot air heating mechanism is controlled to be closed for a preset interval time, and the preset interval time is shorter than the preset time.
Further, the acquisition module comprises two contact type temperature measuring probes, three non-contact type temperature measuring probes and a wind speed sensing probe; the two contact type temperature measuring probes are respectively arranged at the top and the bottom of the processing chamber and are respectively used for collecting the top temperature data and the hot air temperature data; the three non-contact temperature measuring probes are respectively used for collecting the temperatures of three different positions on the polyimide film so as to determine the average value of the three temperatures as the film temperature data; and a wind speed sensor probe is arranged at the bottom of the processing chamber and is used for collecting the hot air speed data.
Further, the acquisition module further comprises two image sensing probes, wherein the two image sensing probes are used for acquiring processing image data in the processing cavity from two angles respectively; the control module also receives the processed image data;
the control module is further configured to: and verifying the processing stage of the stretching control scheme at the current moment according to the processing image data.
Further, the device also comprises a cooling mechanism, a wind-up roll and a dust removing mechanism;
polyimide film output by the processing chamber passes through cooling mechanism extremely the wind-up roll rolling, dust removal mechanism is including setting up in wind part and the dust absorption part at wind-up roll both ends respectively, wind-out direction of wind part with the air extraction direction of dust absorption part is all parallel to the axis of wind-up roll, the dust absorption part is connected with a sack dust collection part.
In a second aspect, the present application provides a method for controlling a polyimide film processing apparatus. The processing device comprises a processing chamber, two groups of conveying rollers, two groups of stretching rollers, a hot air heating mechanism, an acquisition module and a control module;
the two groups of conveying rollers are used for horizontally conveying the polyimide film to pass through the inner top of the processing chamber, the two groups of stretching rollers are used for transversely stretching part of the polyimide film in the processing chamber, and the hot air heating mechanism is used for forming vertical upward hot air at the inner bottom of the processing chamber; the acquisition module is used for acquiring film temperature data of a part of polyimide film in the processing chamber, top temperature data of the top in the processing chamber, hot air temperature data of the bottom in the processing chamber and hot air speed data; the control module is connected with the acquisition module to receive the film temperature data, the top temperature data, the hot air temperature data and the hot air speed data;
The control method is applied to the control module, and comprises the following steps: during the transverse stretching of a polyimide film of a predetermined length,
estimating the highest temperature data of the polyimide film within a preset time period according to the acquired top temperature data, hot air temperature data, film temperature data, a pre-acquired stretching control scheme and a processing stage of the stretching control scheme at the current moment;
estimating minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and initial thickness data of the polyimide film;
substituting the highest temperature data and the minimum thickness data into a pre-trained bearing capacity calculation model to generate wind speed upper limit data, wherein the bearing capacity calculation model is trained based on big data and is used for calculating the highest wind speed which can be borne by a polyimide film with a certain temperature and a certain thickness;
judging whether the hot air speed data is higher than the highest air speed data, and if so, generating alarm information.
Further, in the control method, the control unit,
determining the stretching stop time according to the pre-acquired stretching control scheme and the processing stage of the current time in the stretching control scheme;
Judging whether the stretching stop time is within the preset time length of the current time, if so, taking the stretching stop time as the maximum time, and if not, taking the time of the preset time length from the current time as the maximum time;
the estimating the maximum temperature data of the polyimide film within a preset time period according to the top temperature data, the hot air temperature data, the film temperature data, the pre-obtained stretching control scheme and the processing stage of the stretching control scheme at the current moment, wherein the maximum temperature data is acquired at the current moment and comprises the following steps:
estimating the expected top temperature of the top of the processing chamber at the most value moment according to hot air temperature data, top temperature data and a pre-trained top-bottom heat exchange model, wherein the top-bottom heat exchange model is pre-trained based on big data and is used for reflecting the change of the top temperature after the top heat exchange unit time and the bottom heat exchange unit time of the processing chamber;
estimating the expected film temperature of the polyimide film at the most value moment according to the top temperature data, the estimated temperature data, the film temperature data and a pre-trained top film heat exchange model, wherein the top film heat exchange model is trained based on big data and is used for calculating the temperature change of the polyimide film after the top of the processing chamber and the polyimide film heat exchange unit time;
Taking the predicted film temperature as the highest temperature data; and
the estimating the minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and the initial thickness data of the polyimide film comprises the following steps:
based on the pre-obtained stretching control scheme and initial thickness data of the polyimide film, estimating the thickness data of the polyimide film at the most value moment as the minimum thickness data according to the processing stage of the stretching control scheme at the current moment.
Further, the control module is also connected with the hot air heating mechanism and used for controlling the on-off of the hot air heating mechanism;
the control method further includes: when the alarm information is generated, the hot air heating mechanism is controlled to be closed for a preset interval time, and the preset interval time is shorter than the preset time.
Further, the acquisition module is also used for acquiring processing image data in the processing chamber; the control module also receives the processed image data;
the control method further includes: and verifying the processing stage of the stretching control scheme at the current moment according to the processing image data.
In summary, the application at least comprises the following beneficial effects:
1. the device comprises a processing device, a processing device and a control method, wherein the processing device is used for estimating the bearable maximum wind pressure of the polyimide film according to the temperature and the thickness of the polyimide film in transverse stretching so as to ensure the film forming rate of the polyimide film;
2. the specific calculation method of the highest temperature and the thinnest thickness of the polyimide film in the preset time is reasonable, and is favorable for guaranteeing the reasonable accuracy of the calculated bearable maximum wind pressure, and further guaranteeing the film forming rate of the polyimide film.
It should be understood that the description in this summary is not intended to limit the critical or essential features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the description that follows.
Drawings
The above and other features, advantages and aspects of embodiments of the present application will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:
FIG. 1 is a schematic diagram of a polyimide film processing apparatus according to an embodiment of the present application;
Fig. 2 is a flowchart showing a control method of a polyimide film processing apparatus according to an embodiment of the present application.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The application provides a polyimide film processing device and a control method thereof, which are used for judging whether the actual wind pressure can influence the film forming rate of a polyimide film or not by calculating the wind pressure which can be borne by the polyimide film at a certain temperature and thickness, and alarming if the actual wind pressure can influence the film forming rate of the polyimide film so as to ensure the film forming rate of the polyimide film.
In a first aspect, the present application provides a processing apparatus for a polyimide film.
Fig. 1 shows a schematic diagram of a polyimide film processing apparatus which exhibits a section in a conveying direction of the polyimide film processing apparatus, and a conveying roller is not shown in the embodiment of the present application.
Referring to fig. 1, the processing apparatus includes a processing chamber (an outermost rectangular frame in the drawing), two sets of transfer rollers (not shown in the drawing), two sets of stretching rollers, and a hot air heating mechanism. The two groups of conveying rollers are used for horizontally conveying the polyimide film to pass through the inner top of the processing chamber, the two groups of stretching rollers are used for transversely stretching part of the polyimide film in the processing chamber, and the hot air heating mechanism is used for forming vertical upward hot air at the inner bottom of the processing chamber.
Specifically, two sets of conveying rollers are respectively and horizontally arranged at an inlet and an outlet (not shown in the figure) of the processing chamber, and the two sets of conveying rollers are perpendicular to the length direction of the polyimide film and clamp and convey the polyimide film in the length direction of the polyimide film so as to realize the conveying of the polyimide film through the processing chamber. The two groups of stretching rollers are respectively used for clamping two ends of the width of the polyimide film, and can be close to and far away from the polyimide film in the width direction of the polyimide film so as to realize transverse stretching of the polyimide film in the processing cavity. The hot air heating mechanism can be specifically set as a hot air blower, the hot air blower is arranged at the bottom in the processing cavity, the blowing power and the heating power of the hot air blower are constant, and the air speed and the air temperature of hot air output by the hot air blower are constant under ideal conditions.
The prior art has been fully supported with respect to a more specific structure of the mechanical part of the processing apparatus, such as what mechanism the stretching roller is to clamp and unclamp the two ends of the polyimide film, what mechanism is to be moved toward and away from each other, etc., and is not a key point of the present solution, and is therefore not disclosed in more detail herein.
The transverse stretching assembly line process of the polyimide film comprises the following steps:
firstly, conveying polyimide films with preset lengths into a processing chamber for positioning;
starting a hot air heater module to heat the polyimide film in the processing cavity;
thirdly, after the polyimide film is heated to a certain temperature, two groups of stretching rollers are positioned to clamp two sides of the polyimide film to be stretched, and the two groups of stretching rollers are kept away from each other at a uniform speed in the width direction of the polyimide film so as to realize the transverse stretching of the polyimide film by a preset width;
fourthly, stopping when the two groups of stretching rollers are far away to the farthest, indicating that the polyimide film is transversely stretched, and increasing the width by a preset width, stopping the hot air heating mechanism at the moment, so that the polyimide film in the processing cavity is naturally cooled;
And fifthly, after the polyimide film is cooled to a certain temperature, starting two groups of conveying rollers, conveying the stretched polyimide film out of the processing chamber, and conveying the polyimide film with the preset length to be stretched into the processing chamber for positioning.
Thus, the transverse stretching assembly line process of the polyimide film can be realized.
Under ideal conditions, the transverse stretching speed of the polyimide film and the heating power and the blowing power of the hot air heating mechanism are preset by a person skilled in the art based on experience and actual project requirements, the transverse stretching speed is matched with the heating power, smooth implementation of the transverse stretching power of the polyimide film can be basically realized, the temperature monitoring of the polyimide film is assisted at most, the hot air heating mechanism is closed when the temperature of the polyimide film reaches a temperature threshold, and damage caused by overhigh temperature of the polyimide film is avoided. However, the polyimide film forming rate is not only related to the heating power of the hot air heating mechanism, but also easily affected by the blowing power, and the wind pressures that polyimide films of different thicknesses and different temperatures can withstand are different, and therefore, the polyimide film processing apparatus of the present application is improved.
Based on the improvement background, the processing device further comprises an acquisition module and a control module (not shown in the figure) so as to monitor the polyimide film in the transverse stretching process and ensure the film forming rate of the transverse stretching process. The acquisition module is used for acquiring film temperature data of a part of polyimide film in the processing chamber, top temperature data of the top in the processing chamber, hot air temperature data of the bottom in the processing chamber and hot air speed data; the control module is connected with the acquisition module to receive the film temperature data, the top temperature data, the hot air temperature data and the hot air speed data.
Specifically, the acquisition module comprises two contact type temperature measuring probes, three non-contact type temperature measuring probes and a wind speed sensing probe; the two contact type temperature measuring probes are respectively arranged at the top and the bottom of the processing chamber and are respectively used for collecting top temperature data and hot air temperature data; the three non-contact temperature measuring probes are respectively used for collecting the temperatures of three different positions on the polyimide film so as to determine the average value of the three temperatures as film temperature data; and a wind speed sensor probe is arranged at the bottom of the processing chamber and is used for collecting hot air speed data.
The control module is also connected with a mobile terminal held by an upper computer and/or related personnel.
Control logic executed by the control module during transverse stretching of a polyimide film of a predetermined length is disclosed below.
The control module is configured to: during the transverse stretching of a polyimide film of a predetermined length,
estimating the highest temperature data of the polyimide film within a preset time period according to the acquired top temperature data, hot air temperature data, film temperature data, a pre-acquired stretching control scheme and a processing stage of the stretching control scheme at the current moment;
estimating minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and initial thickness data of the polyimide film;
substituting the highest temperature data and the minimum thickness data into a pre-trained bearing capacity calculation model to generate wind speed upper limit data, wherein the bearing capacity calculation model is trained based on big data and is used for calculating the highest wind speed which can be borne by a polyimide film with a certain temperature and a certain thickness;
Judging whether the hot air speed data is higher than the highest air speed data, and if so, generating alarm information.
In the foregoing, the pre-obtained stretching control scheme represents a transverse stretching process of a polyimide film with a preset length, and the transverse stretching control scheme at least comprises a starting stretching time, a transverse stretching speed and a stopping stretching time, wherein the transverse stretching speed is constant, the initial width of the polyimide film is fixed, and the formable maximum width between two groups of stretching rollers is determined (approximately equal to the width of the polyimide film after transverse stretching), so that the duration between the starting stretching time and the stopping stretching time is determined, and the distance between the two groups of transverse stretching rollers corresponding to each time between the starting stretching time and the stopping stretching time can be determined.
The stretching control scheme is controlled by the control module, based on the principle, the control module can determine the position of the current moment (the current moment is necessarily between the starting stretching moment and the stopping stretching moment because the method is executed in the transverse stretching process of the polyimide film with the preset length) between the starting stretching moment and the stopping stretching moment by combining with the built-in clock, the duration between the current moment and the stopping stretching moment can also be determined, and the magnitude relation between the duration between the current moment and the stopping stretching moment and the preset duration can also be determined.
Based on the foregoing, the control module is further configured to:
determining the stretching stop time according to the pre-acquired stretching control scheme and the processing stage of the current time in the stretching control scheme;
judging whether the stretching stop time is within the preset time length of the current time, if so, taking the stretching stop time as the maximum time, and if not, taking the time of the preset time length from the current time as the maximum time;
based on the foregoing, the control module is further configured to:
estimating the expected top temperature of the top of the processing chamber at the most value moment according to hot air temperature data, top temperature data and a pre-trained top-bottom heat exchange model, wherein the top-bottom heat exchange model is pre-trained based on big data and is used for reflecting the change of the top temperature after the top heat exchange unit time and the bottom heat exchange unit time of the processing chamber;
estimating the expected film temperature of the polyimide film at the most value moment according to the top temperature data, the estimated temperature data, the film temperature data and a pre-trained top film heat exchange model, wherein the top film heat exchange model is trained based on big data and is used for calculating the temperature change of the polyimide film after the top of the processing chamber and the polyimide film heat exchange unit time;
And taking the predicted film temperature as the highest temperature data.
Specifically, the structural model of the processing chamber is known to have basically constant arrangement of internal components, and the position of a contact type temperature measuring probe for collecting top temperature data and hot air temperature data is constant, because the hot air heating mechanism is positioned at the bottom of the processing chamber, the hot air temperature data is generally higher than the top temperature data, when the bottom of the processing chamber and the top are subjected to heat exchange, the top is heated, the bottom temperature of the processing chamber is basically equal to the hot air temperature data of hot air output by the hot air heating mechanism, based on the principle of heat exchange, the heat exchange efficiency of the top and the bottom of the processing chamber can be considered to be influenced by the top temperature data and the hot air temperature data only within the allowable error range, so that the temperature rise of the top temperature data can be determined through limited experimental accumulation when a group of determined hot air temperature data and the top temperature data last for a unit time. The top-bottom heat exchange model is represented as a comparison table reflecting the comparison of (hot air temperature data at the current moment, top temperature data at the current moment) and the top temperature data after unit time. Knowing the hot air temperature data and the top temperature data at the current moment, and also knowing the time length between the maximum moment and the current moment, the predicted top temperature at the top of the processing chamber at the maximum moment can be calculated based on the top-bottom heat exchange model.
In one example, the unit time is 1s, and in the top-bottom heat exchange model, the comparison relationship of the hot air temperature data at the current moment, the top temperature data at the current moment and the predicted top temperature data after the unit time is included, that is, if the hot air temperature data at the current moment and the top temperature data are known, the hot air temperature data at the current moment and the top temperature data are brought into the top-bottom heat exchange model, and the predicted top temperature data after the unit time (1 s) can be obtained by comparison. In actual calculation, hot air temperature data is constant, and 180 seconds is set as the most value time, then the specific process of estimating the estimated temperature data of the top of the processing chamber at the most value time by using the hot air temperature data and the top temperature data at the current time is as follows: taking the current moment as a reference moment (namely 0 moment), taking hot air temperature data (acquired) at the current moment and top temperature data into a top-bottom heat exchange model to obtain top temperature data at 1s, substituting the hot air temperature data and the top temperature data at 1s into the top-bottom heat exchange model to obtain top temperature data at 2s, substituting the top temperature data at 2s into the top-bottom heat exchange model to obtain top temperature data at 3 s.
Similarly, the position of the polyimide film in the processing chamber is known, the positions of three non-contact temperature measuring probes for collecting the film temperature data of the polyimide film are fixed, the positions of the contact temperature measuring probes for collecting the top temperature data are fixed, and as the polyimide film is positioned at the top of the processing chamber, the polyimide film can be heated by the higher temperature at the top of the processing chamber, and when the polyimide film and the top of the processing chamber are subjected to heat exchange, the polyimide film can be heated. Based on the heat exchange principle, the heat exchange efficiency of the polyimide film and the top of the processing chamber can be considered to be influenced by the top temperature data and the film temperature data only within the error allowable range, so that the temperature rise of the film temperature data can be determined when a set of determined film temperature data and top temperature data last for a unit time through limited experimental accumulation. The top film heat exchange model is represented as a comparison table reflecting the comparison of (top temperature data at the current time, film temperature data at the current time) and film temperature data after unit time. Knowing the top temperature data and the film temperature data at the current moment, and also knowing the time between the maximum moment and the current moment, and calculating the predicted film temperature of the polyimide film at the maximum moment based on a top film heat exchange model, wherein the predicted film temperature is the highest temperature data of the polyimide film within the preset time.
In one example, the unit time is 1s, and in the top film heat exchange model, the comparison relationship of the top temperature data at the current time, the film temperature data at the current time and the predicted film temperature data after the unit time is included, that is, if the top temperature data at the current time and the film temperature data are known, the predicted film temperature data after the unit time (1 s) can be obtained by being brought into the top film heat exchange model in a comparison mode. In actual calculation, the maximum time is set to be 180s, and the specific process of estimating the expected film temperature of the polyimide film at the maximum time by using the top temperature data and the film temperature data at the current time is as follows: substituting the top temperature data and the film temperature data at the current time (i.e. acquired) into a top film heat exchange model to obtain film temperature data estimated at 1s, substituting the top temperature data estimated at 1s in the above description and the film temperature data estimated at 1s in the above description into the top film heat exchange model to obtain film temperature data estimated at 2s, substituting the top temperature data estimated at 2s in the above description and the film temperature data estimated at 2s in the above description into the top film heat exchange model to obtain film temperature data at 3 s.
In the foregoing, the unit time is the minimum time unit allowed by the precision, and the time length between any two of the start stretching time, the stop stretching time, the current time and any other time is an integer multiple of the unit time.
The control module is further configured to:
determining the stretching stop time according to the pre-acquired stretching control scheme and the processing stage of the current time in the stretching control scheme;
judging whether the stretching stop time is within the preset time length of the current time, if so, taking the stretching stop time as the maximum time, and if not, taking the time of the preset time length from the current time as the maximum time;
based on the pre-obtained stretching control scheme and initial thickness data of the polyimide film, estimating the thickness data of the polyimide film at the most value moment as the minimum thickness data according to the processing stage of the stretching control scheme at the current moment.
In the foregoing, the initial thickness data of the polyimide film is fixed and obtained, the thickness data of the polyimide film at the start of stretching is the initial thickness data, in the method, if the thickness of the polyimide film uniformly changes in the process that two groups of stretching rollers are kept away from each other at a constant speed (initial thickness is equal to initial width/current width=current thickness), the thickness of the polyimide film at each moment in the process that the distance between the two groups of stretching rollers is transversely enlarged to the farthest distance can be determined, that is, the thickness data of the polyimide film at the most moment can be determined, and the thickness data is the minimum thickness data.
The foregoing calculation model of the bearing capacity is trained based on big data, and through experiments of a processing device which is basically consistent with the processing device in the application, it can be known that when the polyimide film is transversely stretched to be equal to a certain thickness and the polyimide film is at a certain temperature, and the output air flow of the hot air heating mechanism is at a certain wind speed, the probability of abnormal deformation and breakage of the polyimide film (the sum of the probability and the film forming rate is 1) occurs, and the highest wind speed that the polyimide film with a specified temperature and a specified thickness can bear can be estimated based on the preset required film forming rate (lowest value). It should be understood that the bearing capacity calculation model is also a comparison table, and the highest temperature data and the minimum thickness data of the polyimide film are substituted into the thickness, so that the highest wind speed data which can be directly obtained by comparison can be used for guaranteeing a certain film forming rate of the polyimide film.
In the scheme of the embodiment of the application, the hot air speed data is also constant, and whether alarm data need to be generated can be determined by directly comparing the hot air speed data with the highest wind speed data. The alarm data are used for being sent to the upper computer and the mobile terminal so as to remind relevant staff, and the relevant staff can process relevant conditions, so that the film forming rate of the polyimide film can be guaranteed. The alarm information may further include processing time information, where the processing time information is associated with a preset time length, and is generally less than the preset time length, for example, equal to half of the preset time length, so that relevant staff can process the alarm information in time.
Further, the control module is also connected with the hot air heating mechanism and used for controlling the on-off of the hot air heating mechanism; the control module is further configured to: when the alarm information is generated, the hot air heating mechanism is controlled to be closed for a preset interval time, and the preset interval time is shorter than the preset time. Therefore, even if the related staff cannot process the alarm information in time, the film forming rate of the polyimide film can be guaranteed by an automatic control means.
Further, in the foregoing, the position of the stretching roller at the current moment is determined by calculating the distance between two groups of stretching rollers added in the process from the starting stretching moment to the current moment of the stretching control scheme, and the method determined by the algorithm logic and the built-in clock is easy to generate errors, so that the acquisition module can further comprise two image sensing probes; the two image sensing probes are arranged at two different positions in the processing cavity so as to acquire the processing image data from two visual angles respectively; the control module can determine the processing stage of the stretching control scheme at the current moment by processing the position relation of the two groups of stretching rollers in the image data, namely, the distance between the two groups of stretching rollers can be determined. The processing stage at the current moment is based on the display of the processing image data, and the control module can calibrate the processing stage (and the distance between the two groups of stretching rollers) determined based on the clock and the algorithm logic based on the processing image data, so that the calculation accuracy is ensured.
In summary, the processing device can effectively avoid the occurrence of air flow exceeding the bearing range of the polyimide film, and is beneficial to ensuring the film forming rate of the polyimide film.
Further, the processing device also comprises a cooling mechanism, a wind-up roll and a dust removing mechanism;
polyimide film output by the processing chamber passes through cooling mechanism extremely the wind-up roll rolling, dust removal mechanism is including setting up in wind part and the dust absorption part at wind-up roll both ends respectively, wind-out direction of wind part with the air extraction direction of dust absorption part is all parallel to the axis of wind-up roll, the dust absorption part is connected with a sack dust collection part.
The above description of the embodiments of the device further describes the solution of the present application through the method embodiments below.
In a second aspect, an embodiment of the application discloses a control method of a polyimide film processing device.
The processing device comprises a processing chamber, two groups of conveying rollers, two groups of stretching rollers, a hot air heating mechanism, an acquisition module and a control module;
the two groups of conveying rollers are used for horizontally conveying the polyimide film to pass through the inner top of the processing chamber, the two groups of stretching rollers are used for transversely stretching part of the polyimide film in the processing chamber, and the hot air heating mechanism is used for forming vertical upward hot air at the inner bottom of the processing chamber; the acquisition module is used for acquiring film temperature data of a part of polyimide film in the processing chamber, top temperature data of the top in the processing chamber, hot air temperature data of the bottom in the processing chamber and hot air speed data; the control module is connected with the acquisition module to receive the film temperature data, the top temperature data, the hot air temperature data and the hot air speed data.
The control method is applied to the control module.
Fig. 2 is a flowchart showing a control method of a polyimide film processing apparatus according to an embodiment of the present application. The processing device comprises a processing chamber, two groups of conveying rollers, two groups of stretching rollers, a hot air heating mechanism, an acquisition module and a control module; the two groups of conveying rollers are used for horizontally conveying the polyimide film to pass through the inner top of the processing chamber, the two groups of stretching rollers are used for transversely stretching part of the polyimide film in the processing chamber, and the hot air heating mechanism is used for forming vertical upward hot air at the inner bottom of the processing chamber; the acquisition module is used for acquiring film temperature data of a part of polyimide film in the processing chamber, top temperature data of the top in the processing chamber, hot air temperature data of the bottom in the processing chamber and hot air speed data; the control module is connected with the acquisition module to receive the film temperature data, the top temperature data, the hot air temperature data and the hot air speed data.
Referring to fig. 2, the control method is applied to the control module, and includes: during the transverse stretching of a polyimide film of a predetermined length,
Estimating the highest temperature data of the polyimide film within a preset time period according to the acquired top temperature data, hot air temperature data, film temperature data, a pre-acquired stretching control scheme and a processing stage of the stretching control scheme at the current moment;
estimating minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and initial thickness data of the polyimide film;
substituting the highest temperature data and the minimum thickness data into a pre-trained bearing capacity calculation model to generate wind speed upper limit data, wherein the bearing capacity calculation model is trained based on big data and is used for calculating the highest wind speed which can be borne by a polyimide film with a certain temperature and a certain thickness;
judging whether the hot air speed data is higher than the highest air speed data, and if so, generating alarm information.
Further, in the control method, the control unit,
determining the stretching stop time according to the pre-acquired stretching control scheme and the processing stage of the current time in the stretching control scheme;
judging whether the stretching stop time is within the preset time length of the current time, if so, taking the stretching stop time as the maximum time, and if not, taking the time of the preset time length from the current time as the maximum time;
The estimating the maximum temperature data of the polyimide film within a preset time period according to the top temperature data, the hot air temperature data, the film temperature data, the pre-obtained stretching control scheme and the processing stage of the stretching control scheme at the current moment, wherein the maximum temperature data is acquired at the current moment and comprises the following steps:
estimating the expected top temperature of the top of the processing chamber at the most value moment according to hot air temperature data, top temperature data and a pre-trained top-bottom heat exchange model, wherein the top-bottom heat exchange model is pre-trained based on big data and is used for reflecting the change of the top temperature after the top heat exchange unit time and the bottom heat exchange unit time of the processing chamber;
estimating the expected film temperature of the polyimide film at the most value moment according to the top temperature data, the estimated temperature data, the film temperature data and a pre-trained top film heat exchange model, wherein the top film heat exchange model is trained based on big data and is used for calculating the temperature change of the polyimide film after the top of the processing chamber and the polyimide film heat exchange unit time;
taking the predicted film temperature as the highest temperature data; and
the estimating the minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and the initial thickness data of the polyimide film comprises the following steps:
Based on the pre-obtained stretching control scheme and initial thickness data of the polyimide film, estimating the thickness data of the polyimide film at the most value moment as the minimum thickness data according to the processing stage of the stretching control scheme at the current moment.
Further, the control module is also connected with the hot air heating mechanism and used for controlling the on-off of the hot air heating mechanism;
the control method further includes: when the alarm information is generated, the hot air heating mechanism is controlled to be closed for a preset interval time, and the preset interval time is shorter than the preset time.
Further, the acquisition module is also used for acquiring processing image data in the processing chamber; the control module also receives the processed image data;
the control method further includes: and verifying the processing stage of the stretching control scheme at the current moment according to the processing image data.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are alternative embodiments, and that the acts and modules referred to are not necessarily required for the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working processes of the described control method may refer to corresponding processes in the foregoing processing device embodiments, which are not described herein again.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in the present application is not limited to the specific combinations of technical features described above, but also covers other technical features which may be formed by any combination of the technical features described above or their equivalents without departing from the spirit of the disclosure. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
Claims (8)
1. The polyimide film processing device is characterized by comprising a processing chamber, two groups of conveying rollers, two groups of stretching rollers, a hot air heating mechanism, an acquisition module and a control module;
the two groups of conveying rollers are used for horizontally conveying the polyimide film to pass through the inner top of the processing chamber, the two groups of stretching rollers are used for transversely stretching part of the polyimide film in the processing chamber, and the hot air heating mechanism is used for forming vertical upward hot air at the inner bottom of the processing chamber; the acquisition module is used for acquiring film temperature data of a part of polyimide film in the processing chamber, top temperature data of the top in the processing chamber, hot air temperature data of the bottom in the processing chamber and hot air speed data; the control module is connected with the acquisition module to receive the film temperature data, the top temperature data, the hot air temperature data and the hot air speed data;
The control module is configured to: during the transverse stretching of a polyimide film of a predetermined length,
estimating the highest temperature data of the polyimide film within a preset time period according to the acquired top temperature data, hot air temperature data, film temperature data, a pre-acquired stretching control scheme and a processing stage of the stretching control scheme at the current moment;
estimating minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and initial thickness data of the polyimide film;
substituting the highest temperature data and the minimum thickness data into a pre-trained bearing capacity calculation model to generate wind speed upper limit data, wherein the bearing capacity calculation model is trained based on big data and is used for calculating the highest wind speed which can be borne by a polyimide film with a certain temperature and a certain thickness;
judging whether the hot air speed data is higher than the highest air speed data, if so, generating alarm information;
the control module is further configured to:
determining the stretching stop time according to the pre-acquired stretching control scheme and the processing stage of the current time in the stretching control scheme;
Judging whether the stretching stop time is within the preset time length of the current time, if so, taking the stretching stop time as the maximum time, and if not, taking the time of the preset time length from the current time as the maximum time;
estimating the expected top temperature of the top of the processing chamber at the most value moment according to hot air temperature data, top temperature data and a pre-trained top-bottom heat exchange model, wherein the top-bottom heat exchange model is pre-trained based on big data and is used for reflecting the change of the top temperature after the top heat exchange unit time and the bottom heat exchange unit time of the processing chamber;
estimating the expected film temperature of the polyimide film at the most value moment according to the top temperature data, the estimated temperature data, the film temperature data and a pre-trained top film heat exchange model, wherein the top film heat exchange model is trained based on big data and is used for calculating the temperature change of the polyimide film after the top of the processing chamber and the polyimide film heat exchange unit time;
taking the predicted film temperature as the highest temperature data;
and
based on the pre-obtained stretching control scheme and initial thickness data of the polyimide film, estimating the thickness data of the polyimide film at the most value moment as the minimum thickness data according to the processing stage of the stretching control scheme at the current moment.
2. The processing device according to claim 1, wherein the control module is further connected to the hot air heating mechanism for controlling the on-off of the hot air heating mechanism;
the control module is further configured to: when the alarm information is generated, the hot air heating mechanism is controlled to be closed for a preset interval time, and the preset interval time is shorter than the preset time.
3. The processing device according to claim 2, wherein the acquisition module comprises two contact temperature probes, three non-contact temperature probes and one wind speed sensing probe; the two contact type temperature measuring probes are respectively arranged at the top and the bottom of the processing chamber and are respectively used for collecting the top temperature data and the hot air temperature data; the three non-contact temperature measuring probes are respectively used for collecting the temperatures of three different positions on the polyimide film so as to determine the average value of the three temperatures as the film temperature data; and a wind speed sensor probe is arranged at the bottom of the processing chamber and is used for collecting the hot air speed data.
4. A processing apparatus according to claim 3, wherein the acquisition module further comprises two image sensing probes for acquiring processing image data within the processing chamber from two angles, respectively; the control module also receives the processed image data;
The control module is further configured to: and verifying the processing stage of the stretching control scheme at the current moment according to the processing image data.
5. The processing device of claim 4, further comprising a cooling mechanism, a wind-up roll, and a dust removal mechanism;
polyimide film output by the processing chamber passes through cooling mechanism extremely the wind-up roll rolling, dust removal mechanism is including setting up in wind part and the dust absorption part at wind-up roll both ends respectively, wind-out direction of wind part with the air extraction direction of dust absorption part is all parallel to the axis of wind-up roll, the dust absorption part is connected with a sack dust collection part.
6. The control method of the polyimide film processing device is characterized in that the processing device comprises a processing chamber, two groups of conveying rollers, two groups of stretching rollers, a hot air heating mechanism, an acquisition module and a control module;
the two groups of conveying rollers are used for horizontally conveying the polyimide film to pass through the inner top of the processing chamber, the two groups of stretching rollers are used for transversely stretching part of the polyimide film in the processing chamber, and the hot air heating mechanism is used for forming vertical upward hot air at the inner bottom of the processing chamber; the acquisition module is used for acquiring film temperature data of a part of polyimide film in the processing chamber, top temperature data of the top in the processing chamber, hot air temperature data of the bottom in the processing chamber and hot air speed data; the control module is connected with the acquisition module to receive the film temperature data, the top temperature data, the hot air temperature data and the hot air speed data;
The control method is applied to the control module, and comprises the following steps: during the transverse stretching of a polyimide film of a predetermined length,
estimating the highest temperature data of the polyimide film within a preset time period according to the acquired top temperature data, hot air temperature data, film temperature data, a pre-acquired stretching control scheme and a processing stage of the stretching control scheme at the current moment;
estimating minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and initial thickness data of the polyimide film;
substituting the highest temperature data and the minimum thickness data into a pre-trained bearing capacity calculation model to generate wind speed upper limit data, wherein the bearing capacity calculation model is trained based on big data and is used for calculating the highest wind speed which can be borne by a polyimide film with a certain temperature and a certain thickness;
judging whether the hot air speed data is higher than the highest air speed data, if so, generating alarm information;
in the control method of the present invention, in the control method,
determining the stretching stop time according to the pre-acquired stretching control scheme and the processing stage of the current time in the stretching control scheme;
Judging whether the stretching stop time is within the preset time length of the current time, if so, taking the stretching stop time as the maximum time, and if not, taking the time of the preset time length from the current time as the maximum time;
the estimating the maximum temperature data of the polyimide film within a preset time period according to the top temperature data, the hot air temperature data, the film temperature data, the pre-obtained stretching control scheme and the processing stage of the stretching control scheme at the current moment, wherein the maximum temperature data is acquired at the current moment and comprises the following steps:
estimating the expected top temperature of the top of the processing chamber at the most value moment according to hot air temperature data, top temperature data and a pre-trained top-bottom heat exchange model, wherein the top-bottom heat exchange model is pre-trained based on big data and is used for reflecting the change of the top temperature after the top heat exchange unit time and the bottom heat exchange unit time of the processing chamber;
estimating the expected film temperature of the polyimide film at the most value moment according to the top temperature data, the estimated temperature data, the film temperature data and a pre-trained top film heat exchange model, wherein the top film heat exchange model is trained based on big data and is used for calculating the temperature change of the polyimide film after the top of the processing chamber and the polyimide film heat exchange unit time;
Taking the predicted film temperature as the highest temperature data; and
the estimating the minimum thickness data of the polyimide film in a preset time period according to the processing stage of the polyimide film in the stretching control scheme at the current moment based on the pre-acquired stretching control scheme and the initial thickness data of the polyimide film comprises the following steps:
based on the pre-obtained stretching control scheme and initial thickness data of the polyimide film, estimating the thickness data of the polyimide film at the most value moment as the minimum thickness data according to the processing stage of the stretching control scheme at the current moment.
7. The control method according to claim 6, wherein the control module is further connected to the hot air heating mechanism for controlling the on/off of the hot air heating mechanism;
the control method further includes: when the alarm information is generated, the hot air heating mechanism is controlled to be closed for a preset interval time, and the preset interval time is shorter than the preset time.
8. The control method of claim 7, wherein the acquisition module is further configured to acquire process image data within the process chamber; the control module also receives the processed image data;
the control method further includes: and verifying the processing stage of the stretching control scheme at the current moment according to the processing image data.
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