Automatic width measurement and control all-in-one machine for film blowing

Abstract

The utility model provides an automatic width measurement control all-in-one machine for film blowing, which is applied to the field of film blowing production and comprises a controller and two groups of ultrasonic sensors, the controller comprises a controller shell, and a gas flow channel unit, a main control unit board and a controller power supply module are packaged in the controller shell. A power supply and a sensor signal input terminal are fixed on one side of the top of the main control unit board, an LCD liquid crystal display screen is fixed on one side of the main control unit board, a controller power supply module is further fixed between the main control unit board and the controller shell, and a control chip is arranged in the main control unit board; the control unit and the gas circuit unit are combined into a whole, the design is compact and attractive, installation and operation are convenient, maintenance is free of worry, multiple gas adding and reducing control modes are built in, the bubble width can be rapidly and accurately controlled, and the device has market prospects and is suitable for application and popularization.

Description

Technical Field

[0001] The present application relates to the field of blown film production, and in particular to an all-in-one machine for automatic width measurement and control of blown film. Background Art

[0002] In the field of plastic film production, film width control has always been a key issue. Currently, in the traditional blown film production process, width measurement and control mainly rely on manual operation or simple mechanical devices, which has many shortcomings.

[0003] For example, in traditional blown film production, many manufacturers still rely on workers to measure film width using tools such as tape measures. This method not only has low measurement accuracy but is also significantly affected by human factors. For example, different workers may obtain different measurement results, and the measurement process is prone to errors, which cannot accurately reflect the actual film width. Manual measurement is also infrequent, making it difficult to monitor changes in film width in real time. This can lead to large width deviations during the production process, affecting product quality.

[0004] While some traditional mechanical width measurement devices can improve measurement accuracy to a certain extent, they are generally limited to static measurement and cannot adapt to the dynamic changes of film on high-speed production lines. For example, at high film blowing speeds, mechanical width measurement devices may not be able to accurately capture changes in film width in a timely manner, resulting in delayed measurement results. These mechanical width measurement devices are often single-function devices, capable of only measurement but not real-time control of film width. When width deviations are detected, manual adjustments are required, resulting in slow response and impacting production efficiency.

[0005] Furthermore, most existing blown film equipment lacks integrated automatic width measurement and control capabilities. This makes it impossible to automatically adjust production parameters to maintain film width stability if film width deviations occur during production. For example, changes in factors such as raw material temperature and extrusion speed can cause film width to vary, but the equipment cannot automatically adjust these parameters to control the width. The lack of automatic control also increases scrap rates, as films that do not meet the required width must be discarded, resulting in wasted resources and increased costs.

[0006] Therefore, a film blowing automatic width measurement and control integrated machine is proposed to solve the above problems. Utility Model Content

[0007] The purpose of the present application is to solve the technical problems of great difficulty in real-time control of film bubbles and low production efficiency in the existing film blowing process production. Compared with the existing technology, a film blowing automatic width measurement and control integrated machine is provided, including a controller and two groups of ultrasonic sensors, the controller including a controller housing, a gas flow channel unit, a main control unit board and a controller power module are encapsulated in the controller housing, a power supply and sensor signal input terminal is fixed to one side of the top of the main control unit board, an LCD liquid crystal display is fixed on the side of the main control unit board away from the controller housing, a controller operation button is also fixed between the LCD liquid crystal display and the gas flow channel unit, an alarm buzzer is fixed on one side of the main control unit board, a controller power module is also fixed between the main control unit board and the controller housing, and the main control unit board has a built-in control chip;

[0008] The ultrasonic sensors are fixed by a sensor bracket, and two groups of ultrasonic sensors are symmetrically fixed on both sides of a film bubble. The film bubble is prepared by a plastic film extrusion die head. The bottom of the plastic film extrusion die head is provided with a gas inlet port, and the top of the film bubble is guided by two groups of traction rollers.

[0009] The bottom of the gas flow channel unit is provided with an air compressor gas inlet, a gas outlet and a gas exhaust port, the output end of the gas outlet is connected to the input end of the gas entering the mold bubble port, the gas flow channel unit also includes a vacuum generating unit, and the gas flow channel unit is also provided with multiple groups of flow channel module valve bodies for controlling the gas flow rate and opening and closing of the air compressor gas inlet, gas outlet and gas exhaust port, as well as a vacuum control valve for controlling the vacuum generating unit. The main control unit board is also fixed with an electromagnetic valve control signal output terminal.

[0010] Furthermore, the ultrasonic sensor is electrically connected to a power supply and a sensor signal input terminal through a wire, and the power supply and the sensor signal input terminal are electrically connected to a control chip of a main control unit board.

[0011] Furthermore, the flow channel module valve body is electrically connected to the solenoid valve control signal output terminal, and the solenoid valve control signal output terminal is electrically connected to the control chip of the main control unit board.

[0012] Furthermore, the LCD display screen, alarm buzzer, controller operation buttons and controller power module are all electrically connected to the control chip of the main control unit board.

[0013] Furthermore, the control chip built into the main control unit board is a frequency converter chip, and the main control unit board supports Modbus-RTU master / slave communication protocol.

[0014] Furthermore, the ultrasonic sensor is a 0.1 mm-level ultrasonic sensor.

[0015] Compared with the existing technology, the advantages of this application are:

[0016] During actual use, the plastic is heated and melted and extruded through the screw to the plastic film extrusion die. Air is added between the plastics to form a bubble. The controller controls the size of the bubble by controlling the flow channel module valve body and then adding or reducing air into the bubble. The ultrasonic sensor is used to constantly detect the width of the bubble to control the width required by the user. When the bubble size is small, the controller automatically adds air into it. When the bubble size is large, the controller controls the vacuum generating unit to vacuum the gas inside the bubble and discharge it through the gas exhaust port, thereby forming a bubble reduction control. The control unit and the gas path unit are integrated into one, with a compact and beautiful design, easy installation and operation, and worry-free maintenance. It has built-in multiple air addition and reduction control modes, which can quickly and accurately control the bubble width. It has market prospects and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of this application;

[0018] Figure 2 This is a schematic diagram of the explosion structure of this application;

[0019] Figure 3 This is a schematic diagram of the bottom structure of this application;

[0020] Figure 4 This is a schematic diagram of the workflow of this application.

[0021] Description of the numbers in the figure:

[0022] 1. Air compressor gas inlet; 2. Gas outlet; 3. Gas exhaust port; 4. Flow channel module valve body; 5. Vacuum generating unit; 6. Controller operation buttons; 7. Solenoid valve control signal output terminal; 8. Alarm buzzer; 9. LCD liquid crystal display; 10. Main control unit board; 11. Power supply and sensor signal input terminal; 12. Controller housing; 13. Controller power module; 14. Vacuum control valve; 15. Gas flow channel unit; 16. Sensor bracket; 17. Ultrasonic sensor; 18. Plastic film extrusion die head; 181. Gas inlet into the mold bubble; 19. Traction clamp roller; 20. Film bubble. DETAILED DESCRIPTION

[0023] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of this application.

[0024] Example 1:

[0025] The utility model provides a film blowing automatic width measurement and control integrated machine, please refer to Figure 1 - Figure 4 , including a controller and two sets of ultrasonic sensors 17. During the actual installation process, the controller needs to be installed at a height of 1.4-1.5 meters from the ground, the ultrasonic sensor 17 is fixed on the frame of the film blowing equipment, and the ambient temperature is between -20° and 60°. The ultrasonic sensor 17 is not less than 1.2 meters away from the center of the film bubble.

[0026] The controller includes a controller housing 12, in which a gas flow channel unit 15, a main control unit board 10 and a controller power module 13 are encapsulated. A power supply and sensor signal input terminal 11 is fixed to one side of the top of the main control unit board 10. An LCD liquid crystal display 9 is fixed to the side of the main control unit board 10 away from the controller housing 12. A controller operation button 6 is also fixed between the LCD liquid crystal display 9 and the gas flow channel unit 15. An alarm buzzer 8 is fixed to one side of the main control unit board 10. A controller power module 13 is also fixed between the main control unit board 10 and the controller housing 12. The main control unit board 10 has a built-in control chip;

[0027] The ultrasonic sensors 17 are fixed by the sensor bracket 16. Two sets of ultrasonic sensors 17 are symmetrically fixed on both sides of the film bubble 20. The film bubble 20 is prepared by a plastic film extrusion die 18. The bottom of the plastic film extrusion die 18 is provided with a gas inlet bubble port 181. The top of the film bubble 20 is guided by two sets of traction rollers 19.

[0028] The bottom of the gas flow channel unit 15 is provided with an air compressor gas inlet 1, a gas outlet 2 and a gas exhaust port 3. The output end of the gas outlet 2 is connected to the input end of the gas entering the mold bubble port 181. The gas flow channel unit 15 also includes a vacuum generating unit 5. The gas flow channel unit 15 is also provided with multiple groups of flow channel module valve bodies 4 for controlling the gas flow rate and opening and closing of the air compressor gas inlet 1, gas outlet 2 and gas exhaust port 3, as well as a vacuum control valve 14 for controlling the vacuum generating unit 5. The main control unit board 10 is also fixed with an electromagnetic valve control signal output terminal 7.

[0029] When connecting the gas pipe of the gas flow channel unit 15, filters need to be installed on the gas inlet 1 and gas outlet 2 of the air compressor to prevent impurities from entering and damaging the flow channel module valve body 4. There are two ways to connect the gas outlet 2 and the gas inlet mold bubble port 181. One is to connect the gas outlet 2 of the controller to the manual ball valve and then connect it to the gas inlet mold bubble port 181 to shorten the length of the outlet pipe to avoid affecting the exhaust speed.

[0030] The second method is to install a tee at the place where gas enters the bubble port 181. The gas outlet 2 of the controller is connected to the tee through the outlet pipe. The other end of the tee is connected to a manual ball valve. The ball valve end directly provides air intake for the gas entering the bubble port 181. This method is suitable for large bubble control and large manual gas addition volume.

[0031] Specifically, the ultrasonic sensor 17 is electrically connected to the power supply and sensor signal input terminal 11 through a wire, the power supply and sensor signal input terminal 11 is electrically connected to the control chip of the main control unit board 10, the flow channel module valve body 4 is electrically connected to the solenoid valve control signal output terminal 7, the solenoid valve control signal output terminal 7 is electrically connected to the control chip of the main control unit board 10, the LCD display screen 9, the alarm buzzer 8, the controller operation button 6 and the controller power module 13 are all electrically connected to the control chip of the main control unit board 10, the built-in control chip of the main control unit board 10 is a frequency converter chip, the main control unit board 10 supports the Modbus-RTU master / slave communication protocol, and the ultrasonic sensor 17 is a 0.1mm-level ultrasonic sensor.

[0032] During actual use, the plastic is heated and melted and extruded through the screw to the plastic film extrusion die 18. Air is added between the plastics to form a bubble. The controller controls the size of the bubble by controlling the flow channel module valve body 4 and then adding or reducing air into the bubble. The ultrasonic sensor 17 is used to constantly detect the width of the bubble to control the width required by the user. When the bubble size is small, the controller automatically adds air into it. When the bubble size is large, the controller controls the vacuum generating unit 5 to vacuum the gas inside the bubble and discharge it through the gas exhaust port 3, thereby forming a bubble reduction control. The control unit and the air path unit are integrated into one, with a compact and beautiful design, easy installation and operation, and worry-free maintenance. It has built-in multiple air addition and reduction control modes, which can quickly and accurately control the bubble width. It has market prospects and is suitable for promotion and application.

[0033] The above is only the best implementation method adopted by this application in combination with current actual needs, but the scope of protection of this application is not limited to this.

Claims

1. A film blowing automatic width measurement and control integrated machine, comprising a controller and two sets of ultrasonic sensors (17), characterized in that: The controller comprises a controller housing (12), wherein a gas flow channel unit (15), a main control unit board (10) and a controller power module (13) are encapsulated in the controller housing (12); a power supply and sensor signal input terminal (11) is fixed on one side of the top of the main control unit board (10); an LCD display screen (9) is fixed on the side of the main control unit board (10) away from the controller housing (12); a controller operation button (6) is also fixed between the LCD display screen (9) and the gas flow channel unit (15); an alarm buzzer (8) is fixed on one side of the main control unit board (10); a controller power module (13) is also fixed between the main control unit board (10) and the controller housing (12); and the main control unit board (10) has a built-in control chip; The ultrasonic sensors (17) are fixed by a sensor bracket (16), and two groups of the ultrasonic sensors (17) are symmetrically fixed on both sides of a film bubble (20). The film bubble (20) is prepared by a plastic film extrusion die (18). The bottom of the plastic film extrusion die (18) is provided with a gas inlet bubble port (181), and the top of the film bubble (20) is guided by two groups of traction rollers (19); The bottom of the gas flow channel unit (15) is provided with an air compressor gas inlet (1), a gas outlet (2) and a gas exhaust port (3); the output end of the gas outlet (2) is connected to the input end of the gas inlet mold bubble port (181); the gas flow channel unit (15) also includes a vacuum generating unit (5); the gas flow channel unit (15) is also provided with a plurality of flow channel module valve bodies (4) for controlling the gas flow rate and opening and closing of the air compressor gas inlet (1), the gas outlet (2) and the gas exhaust port (3), and a vacuum control valve (14) for controlling the vacuum generating unit (5); the main control unit board (10) is also fixed with an electromagnetic valve control signal output terminal (7).

2. The film blowing automatic width measurement and control integrated machine according to claim 1, characterized in that: The ultrasonic sensor (17) is electrically connected to a power supply and sensor signal input terminal (11) via a wire, and the power supply and sensor signal input terminal (11) is electrically connected to a control chip of a main control unit board (10).

3. The film blowing automatic width measurement and control integrated machine according to claim 1, characterized in that: The flow channel module valve body (4) is electrically connected to the solenoid valve control signal output terminal (7), and the solenoid valve control signal output terminal (7) is electrically connected to the control chip of the main control unit board (10).

4. The film blowing automatic width measurement and control integrated machine according to claim 1, characterized in that: The LCD display screen (9), alarm buzzer (8), controller operation button (6) and controller power module (13) are all electrically connected to the control chip of the main control unit board (10).

5. The film blowing automatic width measurement and control integrated machine according to claim 1, characterized in that: The control chip built into the main control unit board (10) is a frequency converter chip, and the main control unit board (10) supports the Modbus-RTU master / slave communication protocol.

6. The film blowing automatic width measurement and control integrated machine according to claim 1, characterized in that: The ultrasonic sensor (17) is a 0.1 mm-level ultrasonic sensor.

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