A method for adjusting base fabric speed of tension-free fabric feeding device of coating machine

Abstract

The present invention and a tension-free cloth feeding device of a coating machine include a conveying wheel, a spreading wheel, a guide wheel, a bonding wheel and an infrared detector. The spreading wheel is provided downstream of the conveying wheel, the guide wheel is provided downstream of the spreading wheel, the bonding wheel is provided downstream of the guide wheel, and the infrared detector is provided on the lower side of the guide wheel. The present invention relates to a method for adjusting the speed of a base cloth. The first step is to manually adjust the basic position of the infrared detector. The second step is for the infrared detector to detect the height of the base cloth and transmit the signal to the PLC input card. The third step is for the PLC input card to send the signal to the frequency converter after the internal logic. The fourth step is for the frequency converter to drive the variable frequency motor to work. The invention realizes the transmission and coating of the base cloth, and reasonably controls the transmission speed of the base cloth, avoids wrinkling or pulling of the base cloth, enables it to be evenly bonded to the coating, and improves the stability of the product.

Description

Technical Field

[0001] The invention relates to the field of leather production and processing, and in particular to a cloth feeding device and a basic speed adjustment method. Background Art

[0002] Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as a substitute material for it. It is usually made of impregnated non-woven fabric as the base fabric and a microporous polyurethane layer as the grain layer. Both its front and back sides are very similar to leather and have a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather. It is widely used in the production of shoes, boots, bags and balls. Non-woven fabric is a non-woven fabric that directly uses polymer slices, short fibers or filaments to form fibers through airflow or mechanical webs, and then undergoes hydroentanglement, needle punching, or hot rolling reinforcement, and finally undergoes post-finishing to form a non-woven fabric. A new type of fiber product with a soft, breathable and flat structure has the advantages of not producing fiber scraps, being strong, durable, and silky soft. It is also a kind of reinforcing material, and it also has a cotton feel. Compared with cotton fabrics, non-woven bags are easy to form and are cheap. However, non-woven fabrics are not resistant to stretching. When preparing synthetic leather, if the conveyor wheel rotates too slowly, the non-woven fabric as the base fabric will be stretched, which will affect the quality of the synthetic leather. If the conveyor wheel rotates too fast, the non-woven fabric as the base fabric will be wrinkled, which will also affect the quality of the product.

[0003] Conventional coating machines connect the conveying wheel and the laminating wheel to one motor at the same time to achieve matching of the cloth feeding speed and the coating speed. However, the intermediate transmission links and different base fabrics themselves may also cause different base fabric tensions, which may cause the base fabric to wrinkle or become tight, affecting product quality. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a tension-free cloth feeding device of a coating machine and a base cloth speed adjustment method, which realizes automatic adjustment of the rotation speed of the conveying wheel and the laminating wheel, avoids the tension and relaxation of the base cloth, and improves the quality of the product.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a tension-free cloth feeding device of a coating machine, comprising a motor, a conveying wheel, a spreading wheel, a guide wheel, a bonding wheel and an infrared detector, wherein the motor is connected to the conveying wheel, the spreading wheel is provided downstream of the conveying wheel, the guide wheel is provided downstream of the spreading wheel, the bonding wheel is provided downstream of the guide wheel, the infrared detector is provided on the lower side of the guide wheel, the infrared detector comprises a sensor, a PLC input card and a frequency converter, the sensor is connected to the PLC input card, the PLC input card is connected to the frequency converter, and the frequency converter is connected to the motor.

[0006] Preferably, there are two spreading wheels, and the base fabric passes through the middle of the two spreading wheels.

[0007] Preferably, the motor is a variable frequency motor.

[0008] Preferably, the model of the PLC input card is s7-300.

[0009] Preferably, the laminating wheel moves at a certain speed, the infrared detector detects the position height of the base fabric, and feeds back the signal to the PLC input card, the PLC input card analyzes the data, and connects the data analysis to the frequency converter after summarizing the data, the frequency converter then transmits the signal to the motor, and the motor adjusts the movement speed of the conveyor wheel, wherein the conveyor wheel speed is = A*a*(B+C)+A*(1-a), B represents the manual adjustment parameter of the conveyor wheel speed gain, C represents the machine adjustment parameter of the conveyor wheel speed gain, and a represents the maximum stretch rate of the base fabric.

[0010] Preferably, the range of B is 0 to 1, representing that the range of manual adjustment of the base fabric is between the optimal calibration distance and the maximum calibration distance, 0 represents manual adjustment of the base fabric to the negative maximum calibration distance, 1 represents manual adjustment of the base fabric to the positive maximum calibration distance, and 0.5 represents manual adjustment of the base fabric to the optimal calibration distance; the range of C is 0 to 1, representing that the range of machine adjustment of the base fabric is between the optimal calibration distance and the maximum calibration distance, 0 represents machine adjustment of the base fabric to the negative maximum calibration distance, 1 represents machine adjustment of the base fabric to the positive maximum calibration distance, and 0.5 represents machine adjustment of the base fabric to the optimal calibration distance.

[0011] Preferably, the maximum stretch ratio of the base fabric is 0.15.

[0012] In summary, the invention of a tension-free cloth feeding device for a coating machine and a method for adjusting the speed of a base cloth has the following beneficial effects: it shows real-time correction of the rotation speeds of the laminating wheel and the conveying wheel, avoids tension or relaxation of the base cloth, and ensures the quality of the product; the infrared detector is set to monitor the distance the base cloth sinks by gravity, and transmits the sinking distance of the base cloth to the PLC input card, which adjusts the input voltage of the variable frequency motor after analysis, thereby achieving the purpose of controlling the operating speed of the conveying wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the structure of a tension-free cloth feeding device of a coating machine.

[0014] Figure 2 This is a schematic diagram of the structure of the infrared detector.

[0015] Figure 3 It indicates the position of the base fabric between the guide wheels and is used to display the calibrated distance and the maximum calibrated distance.

[0016] 1. Conveying wheel; 2. Spreading wheel; 3. Guide wheel; 4. Laminating wheel; 5. Infrared detector; 6. Optimal calibration distance; 7. Negative maximum calibration distance; 8. Positive maximum calibration distance; 51. Sensor; 52. PLC input card; 53. Frequency converter. DETAILED DESCRIPTION

[0017] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0018] See also Figures 1 to 3 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0019] like Figures 1 to 3 As shown, the present invention relates to a tension-free cloth feeding device of a coating machine and a method for adjusting the speed of a base cloth, which realizes automatic adjustment of the speeds of a conveying wheel and a laminating wheel, avoids tension and relaxation of the base cloth, and improves the quality of the product.

[0020] In order to achieve the above-mentioned purpose and other related purposes, the present invention provides a tension-free cloth feeding device for a coating machine, comprising a motor, a conveying wheel 1, a spreading wheel 2, a guide wheel 3, a bonding wheel 4 and an infrared detector 5, wherein the motor is connected to the conveying wheel 1, and the motor drives the conveying wheel 1 to move. The motor has different operating speeds without voltage, thereby driving the conveying wheel 1 to move at different speeds. The spreading wheel 2 is arranged downstream of the conveying wheel 1, and the spreading wheel 2 is used to evenly spread the base cloth. The guide wheel 3 is arranged downstream of the spreading wheel 2, and the guide wheel 3 is used to guide the movement direction of the base cloth. The bonding wheel 4 is arranged downstream of the guide wheel 3. The infrared detector 5 is provided on the lower side, and the infrared detector 5 includes a sensor 51, a PLC input card 52 and a frequency converter 53. The sensor 51 is connected to the PLC input card 52, and the sensor 51 is used to monitor the sinking distance of the base cloth, and transmit the sinking distance of the base cloth to the PLC input card 52. The PLC input card 52 is connected to the frequency converter 53, and the PLC input card 52 is used to analyze the signal transmitted by the sensor 51, and transmit the analyzed signal to the frequency converter 53 again. The frequency converter 53 is connected to the motor, and the frequency converter 53 adjusts the input voltage of the motor, thereby controlling the transmission speed of the conveying wheel 1.

[0021] In this embodiment, there are two spreading wheels 2, and the base fabric passes through the middle of the two spreading wheels 2.

[0022] In this embodiment, the motor is a variable frequency motor.

[0023] In this embodiment, the model of the PLC input card 52 is s7-300.

[0024] In this embodiment, a base fabric with a maximum stretch rate of 0.15 is selected. After the infrared detector 5 detects the calibrated distance, it feeds back the signal to the PLC input card 52. The PLC input card 52 analyzes the data, and connects the data analysis to the frequency converter 53 after summarizing the data. The frequency converter 53 then transmits the signal to the motor. The motor adjusts the movement speed of the conveyor wheel 1, wherein the conveyor wheel 1 speed = A*a*(B+C)+A*(1-a), B represents the conveyor wheel speed gain manual adjustment parameter, C represents the conveyor wheel speed gain machine adjustment parameter, a represents the maximum stretch rate of the base fabric, and the speed of the conveyor wheel 1 is associated with the speed of the bonding wheel 4, the manual adjustment parameter, the machine adjustment parameter and the maximum stretch rate of the base fabric.

[0025] In this embodiment, A represents the movement speed of the fitting wheel; the calibration distance of the sensor is linearly related to C, and the calibration distance of the sensor is linearly related to the voltage. The calibration distance of the sensor is +50, corresponding to the motor voltage of 10V, the calibration distance of the sensor is 0, corresponding to the motor voltage of 5V, and the calibration distance of the sensor is -50, corresponding to the motor voltage of 0V. The linear relationship is y 电=0.1*X 标 +5; the sensor's calibration distance is +50, corresponding to a C value of 1, the sensor's calibration distance is 0, corresponding to a C value of 0.5, the sensor's calibration distance is -50, corresponding to a C value of 0, and the linear relationship is C = 0.01*X 标 +0.5, where X is the calibrated distance of the sensor and Y is the operating voltage of the motor.

[0026] In this embodiment, the range of B is 0-1, which means that the range of manual adjustment of the base fabric is between the optimal calibration distance and the maximum calibration distance, 0 represents manual adjustment of the base fabric to the maximum calibration distance in the negative direction, 1 represents manual adjustment of the base fabric to the maximum calibration distance in the positive direction, and 0.5 represents manual adjustment of the base fabric to the optimal calibration distance; the range of C is 0-1, which means that the range of machine adjustment of the base fabric is between the optimal calibration distance and the maximum calibration distance, 0 represents machine adjustment of the base fabric to the maximum calibration distance in the negative direction, 1 represents machine adjustment of the base fabric to the maximum calibration distance in the positive direction, and 0.5 represents machine adjustment of the base fabric to the optimal calibration distance. When the equipment is working normally, the sum of the machine adjustment parameters and the manual adjustment parameters is 1, and the conveying wheel and the bonding wheel move at the same speed. When this value deviates from 1, it means that the base fabric deviates from the optimal calibration distance, and the infrared detector will intelligently adjust the input voltage of the motor to adjust the value of the sum of the machine adjustment parameters and the manual adjustment parameters.

[0027] In this embodiment, the position of the base fabric is first manually adjusted so that it is located at the position of 0 at the calibration distance, that is, the optimal calibration distance. At this time, the B value is 0.5, the C value is 0.5, and the working voltage of the motor is 5V. At this time, the movement speed of the conveying wheel and the bonding wheel is the same, and the base fabric is normally bonded at the bonding wheel. When the base fabric is piled up between the conveying wheel and the bonding wheel due to the intermediate transmission link during the transmission process, causing the base fabric to sink and deviate from the optimal calibration distance 6, the sensor will detect that the base fabric is offset to the negative maximum calibration distance 7. At this time, the sensor transmits the information of the detected calibration distance to the PLC input card, and the PLC input card analyzes the calibration distance and transmits the analysis data to the frequency converter, so that the output voltage corresponding to the input of the frequency converter and the motor input voltage become smaller, which causes the movement speed of the conveying wheel to slow down. Since the speed of the bonding wheel is unchanged, the entire device can gradually lift the sinking base fabric slowly, change the calibration distance, and achieve normal bonding of the base fabric. For example, select a base fabric with a maximum expansion ratio of 0.15 and manually adjust the base fabric to the most suitable transmission position. At this time, a is 0.15 and B is 0.5. When the sensor detects that the calibration distance of the base fabric is -10, the base fabric is in a sinking position. Substitute -10 into y 电 =0.1*X 标 +5 and C = 0.01*X 标 +0.5, we get y 电=4V, C is 0.4, and C is substituted into the conveying wheel speed = A*a*(B+C)+A*(1-a), and the conveying wheel speed is obtained as = A*0.15*(0.5+0.4)+A*(1-0.15)=0.985A, indicating that the conveying wheel speed is 98.5% of the laminating wheel speed, the conveying wheel speed is slow, the laminating wheel speed is fast, and the base fabric is gradually tightened to the optimal calibration distance. Therefore, the invention overcomes various defects of the prior art and has high industrial utilization value and practical value.

[0028] The selection of 0~10V and -50~+50 data is only based on the base fabric with a maximum expansion rate of 15%. When the maximum expansion rate of the base fabric changes, these parameters may also change accordingly, and the voltage value range is not limited to 0~10V.

[0029] Another example is provided below. The maximum expansion rate is selected as 8%. At this time, since the expansion rate of the base fabric is relatively small, the calibration distance is selected as -50~+50, and the voltage is selected as 0~10V. The optimal calibration distance of the base fabric is defined as 0, and the input voltage of the motor is 5V; the maximum positive calibration distance of the base fabric is defined as +50, and the input voltage of the motor is 10V; the maximum negative calibration distance of the base fabric is defined as -50, and the input voltage of the motor is 0V. At this time, the functional relationship between the input voltage of the motor and the calibration distance is y 电 =0.1*X 标 +5. When the base fabric sinks, the base fabric position shifts to the maximum negative calibration distance. 电 With X 标 Positively correlated, X 标 Get smaller, y 电 becomes smaller, that is, the input voltage of the motor becomes smaller, and the movement speed of the conveying wheel becomes smaller accordingly, and vice versa.

[0030] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for adjusting the speed of a base fabric of a tension-free fabric feeding device of a coating machine, used for adjusting the tension-free fabric feeding device of the coating machine, comprising a motor, a conveying wheel (1), a spreading wheel (2), a guide wheel (3), a bonding wheel (4) and an infrared detector (5), wherein the motor is connected to the conveying wheel (1), the spreading wheel (2) is arranged downstream of the conveying wheel (1), the guide wheel (3) is arranged downstream of the spreading wheel (2), the bonding wheel (4) is arranged downstream of the guide wheel (3), the infrared detector (5) is arranged on the lower side of the guide wheel (3), the infrared detector (5) comprises a sensor (51), a PLC input card (52) and a frequency converter (53), the sensor (51) is connected to the PLC input card (52), the PLC input card (52) is connected to the frequency converter (53), and the frequency converter (53) is connected to the motor; Features: The laminating wheel (4) moves at a certain speed, the infrared detector (5) detects the position height of the base fabric, and feeds back the signal to the PLC input card (52), the PLC input card (52) analyzes the data, and connects the data analysis and aggregation to the frequency converter (53), the frequency converter (53) then transmits the signal to the motor, and the motor adjusts the movement speed of the conveying wheel, wherein the speed of the conveying wheel (1) = A*a*(B+C)+A*(1-a), A represents the movement speed of the laminating wheel, B represents the manual adjustment parameter of the conveying wheel speed gain, C represents the machine adjustment parameter of the conveying wheel speed gain, a represents the maximum stretch rate of the base fabric, C=0.01*X 标 +0.5,X 标 is the calibration distance of the sensor.

2. The method for adjusting the speed of a base fabric of a tension-free fabric feeding device of a coating machine according to claim 1, characterized in that: There are two spreading wheels (2), and the base fabric passes through the middle of the two spreading wheels.

3. The method for adjusting the speed of a base fabric of a tension-free fabric feeding device of a coating machine according to claim 1, characterized in that: The motor is a variable frequency motor.

4. The method for adjusting the speed of a base fabric of a tension-free fabric feeding device of a coating machine according to claim 1, characterized in that: The model of the PLC input card (52) is s7-300.

5. The method for adjusting the speed of a base fabric of a tension-free fabric feeding device of a coating machine according to claim 1, characterized in that: The range of B is 0 to 1, which means that the range of manual adjustment of the base fabric is between the optimal calibration distance (6) and the maximum calibration distance. 0 means that the base fabric is manually adjusted to the negative maximum calibration distance (7). 1 means that the base fabric is manually adjusted to the positive maximum calibration distance (8). 0.5 means that the base fabric is manually adjusted to the optimal calibration distance (6). The range of C is 0 to 1, which means that the range of machine adjustment of the base fabric is between the optimal calibration distance (6) and the maximum calibration distance. 0 means that the base fabric is adjusted to the negative maximum calibration distance (7). 1 means that the base fabric is adjusted to the positive maximum calibration distance (8). 0.5 means that the base fabric is adjusted to the optimal calibration distance (6).

6. The method for adjusting the speed of a base fabric of a tension-free fabric feeding device of a coating machine according to claim 1, characterized in that: The maximum stretch rate of the base fabric is 0.15.

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