CN113911800A - Intelligent control method and device for pre-shrinking rate of pre-shrunk woven fabric - Google Patents
Intelligent control method and device for pre-shrinking rate of pre-shrunk woven fabric Download PDFInfo
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- CN113911800A CN113911800A CN202111347601.6A CN202111347601A CN113911800A CN 113911800 A CN113911800 A CN 113911800A CN 202111347601 A CN202111347601 A CN 202111347601A CN 113911800 A CN113911800 A CN 113911800A
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- fabric
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- shrinking
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- rubber blanket
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/044—Sensing web tension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/16—Registering, tensioning, smoothing or guiding webs longitudinally by weighted or spring-pressed movable bars or rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C17/00—Fulling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
- G01L5/0076—Force sensors associated with manufacturing machines
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention discloses an intelligent control method and device for fabric pre-shrinkage of a pre-shrinking machine, wherein the control device comprises a rubber blanket shrinking unit, a woolen blanket drying unit and a central processing unit, the rubber blanket shrinking unit comprises a pressing roller, a bearing roller, a rubber blanket and a pressing motor, a first fabric tension adjusting mechanism and a first length measuring mechanism are arranged on the cloth feeding side of the bearing roller, a second fabric tension adjusting mechanism and a second length measuring mechanism are arranged on the cloth discharging side of the bearing roller, the first fabric tension adjusting mechanism, the first length measuring mechanism, the second fabric tension adjusting mechanism, the second length measuring mechanism and the pressing motor are connected with the central processing unit, a temperature sensor for detecting the temperature of the bearing roller and a displacement measuring mechanism for detecting the displacement of the pressing roller are arranged on the rubber blanket shrinking unit, and the temperature sensor and the displacement measuring mechanism are connected with the central processing unit. The method can accurately detect the fabric pre-shrinkage rate on line, and can avoid or greatly reduce the deviation between the actually measured pre-shrinkage rate and the target pre-shrinkage rate.
Description
Technical Field
The invention relates to a pre-shrinking machine, in particular to a fabric pre-shrinking rate control method and a control device of the pre-shrinking machine, and belongs to the technical field of dyeing and finishing equipment and processes.
Background
The fabric pre-shrinking is completed by a pre-shrinking machine. The pre-shrinking machine mainly comprises a wetting machine, a rubber blanket shrinking unit and a woolen blanket drying unit; the wetting machine is used for wetting the fabric to enable the fabric to have plasticity, the rubber blanket cloth shrinking unit is mainly used for finishing preshrinking of the fabric, the woolen blanket drying unit is used for drying and finishing the preshrinked fabric and controlling the cropping moisture regain of the fabric, the preshrinking rate of the fabric is stabilized, and the hand feeling of the fabric is improved. The fabric pre-shrinkage is the percentage of the length of the fabric before and after the mechanical pre-shrinkage finish.
When the fabric is preshrunk, the fabric is inevitably subjected to drafting of various active units, so that tension is generated on the fabric, and overlarge, undersize or fluctuation of the tension can cause larger deviation between the actually measured preshrunk rate and the target preshrunk rate of the fabric, so that in order to reduce the deviation between the actually measured preshrunk rate and the target preshrunk rate, the tension during sampling the length of the fabric before preshrunk finishing and the tension during sampling the length of the fabric after preshrunk finishing are required to be very close.
The traditional fabric pre-shrinking rate control method is that an operator marks a cloth feeding position with a ruler in the driving process, after finishing, the finished value of the marked position at the time is measured at a cloth discharging position with the ruler, the difference between the two is divided by a measured value in the cloth feeding process to obtain the pre-shrinking rate, if the pre-shrinking rate does not meet the process requirement, the general operator adjusts the compaction amount of a compression roller in a rubber blanket shrinking unit by experience and then re-measures, and the process is repeated for many times. The fabric is influenced by subjective factors such as artificial pulling and measurement in the measuring process of the pre-shrinkage rate, so that the actually measured pre-shrinkage rate has larger deviation with the target pre-shrinkage rate.
Therefore, how to avoid the deviation between the actual measurement pre-shrinkage rate and the target pre-shrinkage rate caused by the manual control of the operator on the fabric pre-shrinkage rate and how to ensure the accuracy of the pre-shrinkage rate is a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an intelligent control method for the fabric pre-shrinkage rate of the pre-shrinking machine, which can accurately detect the fabric pre-shrinkage rate on line, avoid or greatly reduce the deviation between the actually measured pre-shrinkage rate and the target pre-shrinkage rate and realize closed-loop control on the fabric pre-shrinkage rate. Meanwhile, the invention also provides an intelligent control device for the fabric pre-shrinkage rate of the pre-shrinking machine, and the device can accurately detect the fabric pre-shrinkage rate on line.
In order to solve the technical problem, the invention adopts the intelligent control method for the fabric pre-shrinkage rate of the pre-shrinking machine, which comprises the following steps:
A. inputting or calling technological parameters of the fabric to be preshrinked by the man-machine interface of the central processing unit, wherein the technological parameters comprise a fabric target preshrinking rate S0;
B. starting a compaction motor to adjust the extrusion amount of the rubber blanket;
C. when the fabric tension on the cloth inlet side and the cloth outlet side of the pressure bearing roller is adjusted to be equal or within a set allowable range, the central processing unit measures the fabric length of the cloth inlet side and the fabric length of the cloth outlet side of the pressure bearing roller within a certain time period to obtain the actually measured fabric pre-shrinkage rate Si;
D. when Si < (0.65-0.98) S0, the central processing unit controls the compaction motor to increase the extrusion amount of the rubber blanket, and the step C is returned to operate sequentially; when Si > (1.02-1.30) S0, the central processing unit controls the compaction motor to reduce the extrusion amount of the rubber blanket, and the step C is returned to operate in sequence; and (C) when the Si is not less than (0.65-0.98) S0 and not more than (1.02-1.30) S0, the central processing unit controls the compaction motor to stop adjusting the extrusion amount of the rubber blanket, and the step C is returned to operate sequentially.
As a preferred embodiment of the present invention, in step D, when Si < (0.65-0.98) S0, the central processing unit controls the pressing motor to increase the pressing amount of the rubber blanket, and when the pressing amount of the rubber blanket reaches the pressing limit position, the central processing unit controls the pressing motor to stop adjusting the pressing amount of the rubber blanket while increasing the temperature of the pressure roller and/or decreasing the fabric running speed, and returns to step C to run sequentially.
As a preferred embodiment of the invention, the central processing unit increases the temperature range alpha of the pressure bearing roller, CYT0 < alpha is less than or equal to 1.5CYT 0; the central processing unit reduces the speed range beta of the fabric running, wherein beta is more than or equal to 0.5VGD0 and is more than or equal to VGD 0; the CYT0 is the process temperature of the backing roll, and the VGD0 is the set running speed of the fabric on the cloth feeding side of the backing roll.
In order to solve the technical problem, the invention adopts the intelligent control device for the fabric pre-shrinkage of the pre-shrinking machine, which comprises a rubber blanket shrinking unit, a woolen blanket drying unit and a central processing unit, wherein the rubber blanket shrinking unit comprises a pressing roller, a bearing roller, a rubber blanket and a pressing motor, a first fabric tension adjusting mechanism and a first length measuring mechanism are arranged at the cloth inlet side of the pressure bearing roller, a second fabric tension adjusting mechanism and a second length measuring mechanism are arranged at the cloth outlet side of the pressure bearing roller, the first fabric tension adjusting mechanism, the first length measuring mechanism, the second fabric tension adjusting mechanism, the second length measuring mechanism and the pressing motor are connected with the central processing unit, the rubber blanket cloth shrinking unit is provided with a temperature sensor for detecting the temperature of the pressure-bearing roller and a displacement measuring mechanism for detecting the displacement of the compression roller, and the temperature sensor and the displacement measuring mechanism are connected with the central processing unit.
As a preferred embodiment of the present invention, the rubber blanket shrinking unit further includes a connecting rod, a detecting rod and a swing arm, one end of the swing arm is rotatably connected to the connecting rod, an arm body of the swing arm is rotatably connected to the compressing roller, the other end of the swing arm is rotatably connected to the pre-shrinking machine frame, one end of the detecting rod is mounted on the connecting rod, the connecting rod is driven by the compressing motor through a transmission mechanism to move, the displacement measuring mechanism is a displacement sensor, and the displacement sensor is mounted on one side of the detecting rod.
In a preferred embodiment of the present invention, a first fabric tension detecting means for detecting a fabric tension is further provided on the cloth feeding side of the backing roller, a second fabric tension detecting means for detecting a fabric tension is further provided on the cloth discharging side of the backing roller, and the first and second fabric tension detecting means are connected to the central processing unit.
In a preferred embodiment of the present invention, the central processing unit is a digital controller with a human-machine interface, or an embedded industrial controller, or an industrial personal computer, or a PLC programmable controller.
After the technical scheme is adopted, the invention has the following beneficial effects:
the invention carries out on-line detection and closed-loop feedback automatic control on the control process of the fabric pre-shrinkage rate, greatly inhibits various disturbances of the fabric pre-shrinkage link, avoids or greatly reduces the deviation between the actually measured pre-shrinkage rate and the target pre-shrinkage rate, improves the control precision of the pre-shrinkage rate and ensures the stability of the pre-shrinkage rate.
The invention eliminates various human factors in the control process of the fabric pre-shrinkage rate, greatly improves the accuracy of the detection of the fabric pre-shrinkage rate, reduces the labor intensity, obviously improves the production efficiency and meets the requirements of high-grade fabric varieties on pre-shrinkage.
The invention can ensure constant tension when the pre-shrinkage rate is detected and sampled, and ensure the accuracy of the detection result of the actually measured pre-shrinkage rate.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the intelligent control device for the pre-shrinking percentage of the pre-shrunk woven fabric, wherein a compaction motor, a connecting rod, a detection rod and a swing arm are not shown in the figure.
Fig. 2 is a schematic structural view of the rubber blanket tarpaulin shrinking unit of the present invention.
Detailed Description
An intelligent control method for fabric pre-shrinkage rate of a pre-shrinking machine is disclosed, referring to fig. 1 and 2, and comprises the following steps:
A. inputting or calling technological parameters of the fabric to be preshrinked by the man-machine interface of the central processing unit, wherein the technological parameters comprise a fabric target preshrinking rate S0;
B. starting a compaction motor 1-4 to adjust the extrusion amount of the rubber blanket; the step can start the compaction motor 1-4 through a central processing unit or manually start the compaction motor 1-4;
C. when the fabric tension on the cloth inlet side and the cloth outlet side of the pressure bearing roller 1-2 is adjusted to be equal or within a set allowable range, the central processing unit measures the fabric length on the cloth inlet side and the fabric length on the cloth outlet side of the pressure bearing roller 1-2 within a certain time period to obtain the actually measured fabric pre-shrinkage rate Si; for example, if the measured feed side fabric length is L1 and the exit side fabric length is L2 over a period of time, the fabric has measured the pre-shrinkage Si, Si = (L1-L2) ÷ L1 × 100%. In the invention, as a preferable scheme, the central processing unit respectively adjusts the fabric tension of the cloth feeding side and the cloth discharging side of the pressure roller 1-2 through a first fabric tension adjusting mechanism 3 arranged on the cloth feeding side of the pressure roller 1-2 and a second fabric tension adjusting mechanism 5 arranged on the cloth discharging side of the pressure roller 1-2, and preferably detects the fabric tension of the cloth feeding side and the cloth discharging side through a first fabric tension detecting mechanism arranged on the cloth feeding side of the pressure roller 1-2 and a second fabric tension detecting mechanism arranged on the cloth discharging side of the pressure roller 1-2; the time period can be the same time period started at the same moment or equal time periods started at different moments;
D. when Si < (0.65-0.98) S0, the central processing unit controls the compaction motor 1-4 to increase the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate in sequence; when Si > (1.02-1.30) S0, the central processing unit controls the compaction motor 1-4 to reduce the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate in sequence; and when the Si is more than or equal to (0.65-0.98) S0 and less than or equal to (1.02-1.30) S0, the central processing unit controls the compaction motor 1-4 to stop adjusting the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate sequentially. In the invention, the central processing unit usually controls the compacting motor 1-4 to drive the connecting rod 1-5 to move forward, and drives one end of the swing arm 1-7 to rotate clockwise around the other end of the swing arm rotatably connected with the pre-shrinking machine frame, so that the extrusion amount of the compacting roller 1-1 to the rubber blanket 1-3 is increased, otherwise, the driving connecting rod 1-5 moves backward, and drives one end of the swing arm 1-7 to rotate anticlockwise around the other end of the swing arm rotatably connected with the pre-shrinking machine frame, so that the extrusion amount of the compacting roller 1-1 to the rubber blanket 1-3 is reduced. In this step, a first preferred scheme is: when Si is less than 0.65S0, the central processing unit controls the compaction motor 1-4 to increase the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate sequentially; when Si is more than 1.30S0, the central processing unit controls the compaction motor 1-4 to reduce the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate in sequence; when Si is more than or equal to 0.65S0 and less than or equal to 1.30S0, the central processing unit controls the compaction motor 1-4 to stop adjusting the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate sequentially. The second preferred solution is: when Si is less than 0.98S0, the central processing unit controls the compaction motor 1-4 to increase the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate sequentially; when Si is more than 1.02S0, the central processing unit controls the compaction motor 1-4 to reduce the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate in sequence; and when Si is more than or equal to 0.98S0 and less than or equal to 1.02S0, the central processing unit controls the compaction motor 1-4 to stop adjusting the extrusion amount of the rubber blanket 1-3, and the step C is returned to operate sequentially. A preferred third scheme is: when Si is less than 0.8S0, the central processing unit controls the compaction motors 1-4 to increase the extrusion amount of the rubber blankets 1-3, and the step C is returned to operate sequentially; when Si is more than 1.2S0, the central processing unit controls the compaction motors 1-4 to reduce the extrusion amount of the rubber blankets 1-3, and the step C is returned to operate in sequence; and when Si is more than or equal to 0.8S0 and less than or equal to 1.2S0, the central processing unit controls the compaction motors 1-4 to stop adjusting the extrusion amount of the rubber blankets 1-3, and the step C is returned to operate sequentially. Of course, more alternatives are possible.
As a preferred embodiment of the present invention, in step D, when Si < (0.65-0.98) S0, the central processing unit controls the pressing motor 1-4 to increase the pressing amount of the rubber blanket 1-3, and when the pressing amount of the rubber blanket 1-3 reaches the pressing limit position, the central processing unit controls the pressing motor 1-4 to stop adjusting the pressing amount of the rubber blanket 1-3 while increasing the temperature of the pressure roller 1-2 and/or decreasing the running speed of the fabric 9, and returns to step C to run sequentially. In the invention, a proximity switch is arranged at the limit position of the extrusion amount of the rubber blankets 1-3, the pressing motor 1-4 is stopped by touching the proximity switch, or the limit position of the detection rod 1-6 is detected by a displacement sensor, when the displacement sensor detects that the detection rod 1-6 reaches the limit position of the extrusion amount of the rubber blankets 1-3, a signal is output to the central processing unit, and the central processing unit controls the pressing motor 1-4 to stop adjusting the extrusion amount of the rubber blankets 1-3.
As a preferred embodiment of the invention, the central processing unit increases the temperature range alpha of the pressure bearing roller 1-2, CYT0 < alpha ≦ 1.5CYT 0; the central processing unit reduces the speed range beta of the running of the fabric 9, wherein beta is more than or equal to 0.5VGD0 and is less than VGD 0; the CYT0 is the process temperature of the backing roll, and the VGD0 is the set running speed of the fabric on the cloth feeding side of the backing roll 1-2.
Referring to fig. 1 and 2, an intelligent control device for fabric pre-shrinking rate of a pre-shrinking machine comprises a rubber blanket shrinking unit 1, a blanket drying unit 2 and a central processing unit, wherein the rubber blanket shrinking unit 1 comprises a pressing roller 1-1, a pressure roller 1-2, a rubber blanket 1-3 and a pressing motor 1-4, a first fabric tension adjusting mechanism 3 and a first length measuring mechanism 4 are arranged at the cloth feeding side of the pressure roller 1-2, a second fabric tension adjusting mechanism 5 and a second length measuring mechanism 6 are arranged at the cloth discharging side of the pressure roller 1-2, the first fabric tension adjusting mechanism 3, the first length measuring mechanism 4, the second fabric tension adjusting mechanism 5, the second length measuring mechanism 6 and the pressing motor 1-4 are connected with the central processing unit, a temperature sensor 7 for detecting the temperature of the pressure roller 1-2 and a displacement measuring mechanism 8 for detecting the displacement of the pressing roller 1-1 are arranged on the rubber blanket shrinking unit 1, the temperature sensor 7 and the displacement measuring mechanism 8 are connected with a central processing unit. The temperature sensor 7 preferably adopts an infrared temperature sensor, and the pressure of the steam can be controlled by adjusting the control valve in real time according to the data monitored by the online infrared temperature sensor by controlling the temperature of the pressure bearing roller 1-2. Generally, the steam pressure value corresponds to the temperature value. The central processing unit compares the received temperature value with a set temperature value, sends an instruction to the control valve, performs PID control on the temperature of the pressure bearing roller 1-2, controls the amount of inlet and outlet steam, and realizes automatic control of the temperature. The control of the temperature of the backing roll 1-2 is an automatic control system with a closed loop formed by a forward path and a feedback path for temperature setting.
In the present invention, the first fabric tension adjusting mechanism 3 and the second fabric tension adjusting mechanism 5 may adopt a structure disclosed in patent application No. 202011170757.7 filed earlier by the present applicant and named as a method and a device for detecting a pre-shrinking percentage of a pre-shrunk woven fabric, for example, the first fabric tension adjusting mechanism 3 includes a first cloth guide roller 3-1 and a first cylinder and a second cylinder respectively arranged at two ends of the first cloth guide roller 3-1, the first cylinder and the second cylinder are connected with a first air inlet adjusting valve, and a cylinder shaft of the first cylinder and a cylinder shaft of the second cylinder are respectively connected with or abutted against two ends of the first cloth guide roller; the second fabric tension adjusting mechanism 5 comprises a second fabric guide roller 5-1, and a third cylinder and a fourth cylinder which are respectively arranged at two ends of the second fabric guide roller 5-1, the third cylinder and the fourth cylinder are connected with a second air inlet adjusting valve, a cylinder shaft of the third cylinder and a cylinder shaft of the fourth cylinder are respectively connected with or abutted against two ends of the second fabric guide roller, the first air inlet adjusting valve and the second air inlet adjusting valve are controlled by the central processing unit, the detailed structure can refer to the publication of the applicant's above-mentioned earlier application in the figure, and the fabric tension can be adjusted only by adjusting the air inlet amount or the air outlet amount of the first air inlet adjusting valve and the second air inlet adjusting valve during working, which is not described herein again. The first length measuring mechanism 4 and the second length measuring mechanism 6 can adopt roller encoders, can be arranged on the first cloth guide roller and the second cloth guide roller, and can also adopt photoelectric speed sensors and the like as length measuring elements, as shown in fig. 1.
In the present invention, the first fabric tension adjusting mechanism 3 and the second fabric tension adjusting mechanism 5 may also adopt other conventional or known structures.
In the present invention, as shown in fig. 2, the rubber blanket shrinking unit 1 of the pre-shrinking machine further includes a connecting rod 1-5, a detecting rod 1-6 and a swing arm 1-7, one end of the swing arm 1-7 is rotatably connected with the connecting rod 1-5, an arm body of the swing arm 1-7 is rotatably connected with the compressing roller 1-1, the other end of the swing arm 1-7 is rotatably connected with the frame of the pre-shrinking machine, an upper end shown in the drawing of one end of the detecting rod 1-6 is fixedly installed on the connecting rod 1-5, the connecting rod 1-5 is driven to move by a compressing motor 1-4 through a transmission mechanism 1-8 usually by a screw nut transmission mechanism, the displacement measuring mechanism 8 is a displacement sensor, the displacement sensor is installed on one side of the detecting rod 1-6, and the displacement sensor is preferably a non-contact laser displacement sensor, although a commercially available contact displacement sensor can also be used. When the rubber blanket extrusion device works, the central processing unit controls the compression motor 1-4 to drive the connecting rod 1-5 to move back and forth through the transmission mechanism 1-8, and when the connecting rod 1-5 moves, the swing arm 1-7 drives the compression roller 1-1 to move so as to adjust the extrusion amount of the rubber blanket 1-3. When the connecting rod 1-5 moves, the detection rod 1-6 moves along with the connecting rod, the displacement sensor transmits the detected movement amount data of the detection rod 1-6 to the central processing unit, and the central processing unit calculates the adjusted extrusion amount of the rubber blanket 1-3.
In a preferred embodiment of the present invention, a first fabric tension detecting means for detecting the fabric tension is further provided on the cloth feeding side of the backing roller 1-2, and a second fabric tension detecting means for detecting the fabric tension is further provided on the cloth discharging side of the backing roller 1-2, and the first and second fabric tension detecting means are connected to the central processing unit, not shown. In the present invention, the first and second fabric tension detecting mechanisms may adopt a structure disclosed in the patent application No. 202011170757.7 filed earlier by the present applicant and entitled preshrinking rate detecting method and apparatus for preshrinked woven fabric, for example, the first fabric tension detecting mechanism includes a third cloth guide roller disposed at the cloth feeding side of the pressure roller 1-2, and a first force sensor is mounted at least at one end of the third cloth guide roller; the second fabric tension detection mechanism comprises a fourth cloth guide roller arranged on the cloth outlet side of the pressure bearing roller 1-2, at least one end of the fourth cloth guide roller is provided with a second force sensor, the first force sensor and the second force sensor are connected with the central processing unit, the specific structure of the second fabric tension detection mechanism is shown in the figure and can be seen in the publication of the applicant's earlier application, and the fabric tension can be detected through the first force sensor and the second force sensor during working, which is not described herein again.
As a preferred embodiment of the present invention, the central processing unit is a digital controller with a human-machine interface, such as a DDC digital controller or an embedded industrial controller or an industrial personal computer or a PLC programmable controller, although other types of controllers may be used, and the central processing unit is not shown in the figure.
Through tests, the method avoids or greatly reduces the deviation between the actually measured pre-shrinkage rate and the target pre-shrinkage rate, improves the control precision of the pre-shrinkage rate, ensures the stability of the pre-shrinkage rate, improves the product percent of pass, and obtains good effects.
Claims (7)
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| CN202111347601.6A CN113911800A (en) | 2021-11-15 | 2021-11-15 | Intelligent control method and device for pre-shrinking rate of pre-shrunk woven fabric |
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| CN202111347601.6A CN113911800A (en) | 2021-11-15 | 2021-11-15 | Intelligent control method and device for pre-shrinking rate of pre-shrunk woven fabric |
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Cited By (1)
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| CN120370709A (en) * | 2025-06-20 | 2025-07-25 | 浙江中免检测有限公司 | Full-flow fabric shrinkage dynamic calibration method and system based on edge calculation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120370709A (en) * | 2025-06-20 | 2025-07-25 | 浙江中免检测有限公司 | Full-flow fabric shrinkage dynamic calibration method and system based on edge calculation |
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