An adhesive film weight per unit area monitoring device

Abstract

The utility model belongs to the technical field of glue film quality monitoring, especially relate to a glue film gram weight monitoring devices. Include: glue groove, be used for containing resin, coating roller, its rotary connection is in the glue groove top, and bottom end is soaked in resin, support roll, be used for traction drive release paper movement, and through its with the speed ratio difference of coating roller resin that coating roller surface carries is adhered to release paper on formation glue film, scraper, its with coating roller interval adjustable, weigher, meter, width measuring instrument, controller, be used for according to the total weight difference of weigher weighing of glue groove and resin in glue groove in unit time period, metering ware metering glue film advancing length and width measuring instrument measurement glue film width average value calculate the glue film gram weight. Through adopt the way of weighing to calculate the resin weight consumption of coating film procedure real time, combine metering ware and width measuring instrument detect real time glue film advancing length and width, through the controller calculation can be convenient to obtain the real time gram weight of glue film.

Description

Technical Field

[0001] This utility model belongs to the field of adhesive film quality monitoring technology, and in particular relates to an adhesive film weight monitoring device. Background Technology

[0002] Resin film preparation is a crucial step in prepreg production, and the stability of its basis weight plays a vital role in the resin content, appearance, and impregnation degree of the prepreg. Currently, X-ray thickness gauges are commonly used to monitor the basis weight of the film. This involves emitting a certain type of radiation; as the radiation passes through the film, the film absorbs or refracts some of the radiation, and the remaining radiation is received by a radiation receiver beneath the film. The real-time basis weight of the film is calculated based on the absorption rate of the radiation. However, this method has several drawbacks: Thickness gauges emit radiation that can be harmful to the human body. The radiation emitted by thickness gauges also attenuates over time, affecting the accuracy of the film's basis weight. Different resins have different absorption rates of radiation, requiring calibration before production to correct the discrepancy between the actual basis weight of the film and the thickness gauge reading. This process is difficult and results in film waste. Furthermore, thickness gauge systems are complex and expensive, and each coating machine requires two thickness gauges, significantly increasing the overall cost. Summary of the Invention

[0003] In view of the above-mentioned problems in the prior art, the present invention provides a film basis weight monitoring device, which is simple, highly accurate and applicable to the detection of basis weight of films of different materials.

[0004] To achieve the above objectives, the technical solution provided in this application is as follows: This utility model provides a film basis weight monitoring device, comprising: A resin tank is used to hold resin. The coating roller is rotatably connected above the glue tank, and its bottom end is immersed in the resin; The support roller is used to pull and move the release paper, and through the speed ratio difference between the support roller and the coating roller, it adheres the resin carried on the surface of the coating roller to the release paper to form an adhesive film. A doctor blade is used to scrape off excess resin carried on the coating roller, and the distance between the doctor blade and the coating roller is adjustable. A weighing instrument used to weigh the glue tank and the total weight of the resin in the tank; A meter counter is used to measure the length of the adhesive film traveled. Width gauge, used to measure the width of adhesive film; The controller is used to calculate the weight of the glue film based on the difference between the total weight of the glue tank and the total weight of the resin in the glue tank weighed by the weighing device within a unit time period, the travel length of the glue film measured by the meter counter within a unit time period, and the average width of the glue film measured by the width measuring instrument within a unit time period.

[0005] Optionally, it also includes a first guide roller and a second guide roller for guiding the release paper, the first guide roller being arranged in front of the support roller and the second guide roller being arranged behind the support roller.

[0006] Optionally, it also includes a doctor blade holder, with its two sides connected to the two side walls opposite to the glue tank, the doctor blade connected to the bottom end of the doctor blade holder, and the angle between the doctor blade and the doctor blade holder is adjustable; the doctor blade holder is used to limit the resin to the side of the doctor blade holder away from the coating roller.

[0007] Optionally, the two sides of the scraper are fitted with the two arms opposite to the glue groove; and / or, the scraper support is inserted into the resin to a depth equal to half the total depth of the resin.

[0008] Optionally, the width measuring instrument is installed on the side of the release paper carrying the adhesive film, and the width measuring instrument is a non-contact width measuring instrument.

[0009] Optionally, the width measuring instrument is a laser triangulation type online width measuring instrument.

[0010] Optionally, it may also include an unwinding roll for unwinding the release paper; and / or, a winding roll for winding the film.

[0011] Optionally, the glue tank is arranged above the weighing device.

[0012] Compared with the prior art, this application has at least the following beneficial effects: This invention calculates the real-time resin weight consumption during the coating process by weighing, and combines a meter counter and a width measuring instrument to detect the real-time travel length and width of the film. The real-time weight of the film can then be calculated by the controller.

[0013] This invention uses mechanical methods to measure both resin weight consumption and film size, avoiding the radiation harm and attenuation issues associated with X-ray thickness gauges that can affect the accuracy of film weight measurement. The method for measuring film weight is the same for different types of resins, making it easy to operate. In contrast, using a thickness gauge is limited by the varying absorption rates of different resins, requiring recalibration of the gauge before each production run, leading to increased operational difficulty and wasted film length. This solution features a simple device structure, low cost, and reduced film quality inspection costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a film weight monitoring device according to an embodiment of the present invention; Explanation of reference numerals in the attached figures: 1. Meter counter; 2. First guide roller; 3. Width gauge; 4. Support roller; 5. Scraper bracket; 6. Glue tank; 7. Scraper clamp; 8. Scraper; 9. Weighing device; 10. Coating roller; 11. Unwinding roller; 12. Second guide roller. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other. Example

[0019] like Figure 1 As shown, a film basis weight monitoring device includes: Glue tank 6, used to hold resin; The coating roller 10 is rotatably connected above the glue tank 6, and its bottom end is immersed in the resin; The support roller 4 is used to pull and drive the release paper to move, and through the speed ratio difference between it and the coating roller 10, it adheres the resin carried on the surface of the coating roller 10 to the release paper to form an adhesive film. The doctor blade 8 is used to scrape off excess resin carried on the coating roller 10, and the distance between the doctor blade and the coating roller 10 is adjustable. Weighing device 9 is used to weigh the glue tank 6 and the total weight of the resin in the glue tank 6. Meter 1 is used to measure the travel length of the adhesive film. Width gauge 3 is used to measure the width of the adhesive film; The controller is used to calculate the weight of the adhesive film based on the difference in total weight of the glue tank 6 and the resin in the glue tank 6 weighed by the weighing device 9 within a unit time period, the travel length of the adhesive film measured by the meter counter 1 within a unit time period, and the average width of the adhesive film measured by the width measuring instrument 3 within a unit time period.

[0020] The formula for calculating the basis weight of the adhesive film is as follows: Film basis weight (g / ㎡) = (△W) / (μ) （B） *△L)*106; Where △W is the difference (g) between the total weight of the glue tank 6 and the resin in the glue tank 6 weighed by the weighing device 9 within a unit time period (e.g., within 10 seconds); μ （B） △L is the average width of the film measured by the width measuring instrument 3 within a unit time period (e.g., within 10 seconds); △L is the length of the film traveled by the meter counter 1 within a unit time period (e.g., within 10 seconds). This invention calculates the real-time resin weight consumption during the coating process by weighing, and combines the real-time travel length and width of the film with the meter counter 1 and the width measuring instrument 3. The real-time weight of the film can then be calculated by the controller. Example

[0021] The difference between this embodiment and embodiment 1 is that it also includes a first guide roller 2 and a second guide roller 12 for guiding the release paper. The first guide roller 2 is arranged in front of the support roller 4, and the second guide roller 12 is arranged behind the support roller 4.

[0022] It also includes a doctor blade holder 5, with the two sides of the doctor blade holder 5 connected to the two side walls opposite to the glue tank 6 respectively. The doctor blade 8 is connected to the bottom end of the doctor blade holder 5 through the doctor blade clamp 7, and the angle between the doctor blade 8 and the doctor blade holder 5 is adjustable. The doctor blade holder 5 is used to limit the resin to the side of the doctor blade holder 5 away from the coating roller 10.

[0023] In this embodiment, the two sides of the scraper 8 are attached to the two arms opposite to the glue tank 6; the scraper support 5 is inserted into the resin to a depth of half the total depth of the resin. In this embodiment, the resin refers to epoxy resin, which has very poor flowability. The scraper support 5 is inserted to a certain depth and the resin is blocked on the side of the scraper support 5 away from the coating roller 10, thereby playing a role in flow obstruction, reducing the flow of resin in the glue tank 6, and further improving the accuracy of resin weighing.

[0024] The width measuring instrument 3 is installed on the side of the release paper carrying the adhesive film. The width measuring instrument 3 is a non-contact type. In this embodiment, the width measuring instrument 3 is a laser triangulation type online width measuring instrument 3.

[0025] In this embodiment, the glue tank 6 is arranged above the weighing device 9, which uses an S-type weighing sensor (accuracy ±0.1%FS, range 50KG); the meter counter 1 uses a photoelectric meter counter 1 (such as HJ600), with the meter counter wheel contacting the glue film for friction transmission, and has a built-in incremental encoder (resolution 1000P / R), which calculates the glue film travel length through the gear ratio, with an accuracy of ±0.1%.

[0026] It also includes an unwinding roller 11 for unwinding the release paper; and / or, a winding roller for winding the film.

[0027] The film basis weight monitoring device of this invention has the following advantages compared with the traditional method of monitoring film basis weight using X-ray thickness gauges: a: High safety factor. X-ray thickness gauges have a certain degree of radiation, while the monitoring device in this patent is a mechanical device, which has a high safety factor.

[0028] b: Low manufacturing and maintenance costs. X-ray thickness gauges are expensive and require regular maintenance to prevent radiation source leakage, increasing the cost of using the equipment. In contrast, the device in this patent is inexpensive and only requires simple mechanical calibration in daily use.

[0029] c: Simple operation and wide applicability. Different specifications of resin have different absorption rates for radiation. Radiation thickness gauges require coefficient calibration before production, and operators need to be trained before they can work, making operation difficult. However, the device of this patent only requires simple calculations to obtain the weight of the film, making it widely applicable.

[0030] d: High measurement accuracy. X-ray thickness gauges are greatly affected by external environmental interferences such as temperature and humidity, film appearance, and power supply voltage fluctuations, which seriously affect measurement accuracy. However, the device in this patent is not easily affected by external interference.

[0031] e: The material limitations for thickness measurement are minimal. Epoxy resin contains a large number of chemical elements, some of which have weak signal reception capabilities for radiation, making it difficult to perform basis weight correction on the film. However, the device in this patent has a simple structure, and the basis weight can be monitored as long as the resin has a certain degree of fluidity, thus minimizing material limitations.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A film basis weight monitoring device, characterized in that, include: A resin tank is used to hold resin. The coating roller is rotatably connected above the glue tank, and its bottom end is immersed in the resin; The support roller is used to pull and move the release paper, and through the speed ratio difference between the support roller and the coating roller, it adheres the resin carried on the surface of the coating roller to the release paper to form an adhesive film. A doctor blade is used to scrape off excess resin carried on the coating roller, and the distance between the doctor blade and the coating roller is adjustable. A weighing instrument used to weigh the glue tank and the total weight of the resin in the tank; A meter counter is used to measure the length of the adhesive film traveled. Width gauge, used to measure the width of adhesive film; The controller is used to calculate the weight of the glue film based on the difference between the total weight of the glue tank and the total weight of the resin in the glue tank weighed by the weighing device within a unit time period, the travel length of the glue film measured by the meter counter within a unit time period, and the average width of the glue film measured by the width measuring instrument within a unit time period.

2. The film weight monitoring device according to claim 1, characterized in that, It also includes a first guide roller and a second guide roller for guiding the release paper, the first guide roller being arranged in front of the support roller and the second guide roller being arranged behind the support roller.

3. The film basis weight monitoring device according to claim 1, characterized in that, It also includes a doctor blade holder, with its two sides connected to the two side walls opposite to the glue tank. The doctor blade is connected to the bottom of the doctor blade holder, and the angle between the doctor blade and the doctor blade holder is adjustable. The doctor blade holder is used to limit the resin to the side of the doctor blade holder away from the coating roller.

4. The film weight monitoring device according to claim 3, characterized in that, The two arms of the scraper are attached to the glue groove on both sides; and / or, the scraper support is inserted into the resin to a depth of half the total depth of the resin.

5. The film weight monitoring device according to claim 1, characterized in that, The width measuring instrument is installed on the side of the release paper carrying the adhesive film, and the width measuring instrument is a non-contact width measuring instrument.

6. The film basis weight monitoring device according to claim 5, characterized in that, The width measuring instrument is a laser triangulation type online width measuring instrument.

7. The film basis weight monitoring device according to claim 1, characterized in that, It also includes an unwinding roll for unwinding the release paper; and / or, a winding roll for winding the film.

8. The film basis weight monitoring device according to claim 1, characterized in that, The glue tank is arranged above the weighing device.

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