A base film coating production line with biaxial stretching equipment

Abstract

The present invention discloses a base film coating production line with biaxial stretching equipment for use in the field of stretching forming. The production line performs segment-type preheating on the base film by arranging multiple preheating columns, so that the base film exchanges heat with the preheating columns in a line contact manner during movement, effectively improving the uniformity of preheating. By heating water and circulating the water in the preheating columns, the heat of the water exchanges heat with the base film in a convection manner, effectively preventing excessive preheating of the base film. An infrared thermal monitor is arranged above the base film to monitor the preheating situation in real time. When the preheating is insufficient or excessive, the infrared thermal monitor adjusts and controls the electric heater and the electromagnet to adjust the heating temperature and the water flow rate, thereby effectively improving the preheating effect of the base film, realizing adaptive regulation of the preheating of the base film, and effectively preventing insufficient or excessive preheating of the base film.

Description

Technical Field

[0001] The invention relates to the field of stretching and forming, in particular to a base film coating production line with a biaxial stretching device. Background Art

[0002] The biaxially oriented base film coating line is a device used to produce high-performance base films with special coatings. This line combines biaxially oriented and coating technologies to produce base film products with excellent physical properties and surface characteristics.

[0003] The biaxially stretched base film is fed directly into the in-line coating process, improving production efficiency and minimizing material loss. To ensure smooth feeding and coating quality, the biaxially stretched base film undergoes a series of treatments. The first step is preheating. Current preheating methods struggle to control the temperature. Both excessive and insufficient preheating can affect the bonding between the base film and the coating liquid, and uniform preheating is difficult to achieve, resulting in varying bonding strengths between the base film and the coating liquid on one side.

[0004] To this end, we use this technical solution to solve the problem that the existing base film preheating temperature is difficult to control. Summary of the Invention

[0005] The purpose of the present invention is to improve the base film coating production line in the prior art. Compared with the prior art, a base film coating production line with a biaxial stretching device is provided. The base film is preheated in a segmented manner by arranging multiple preheating columns, so that the base film exchanges heat with the preheating columns in a line contact manner during the movement, thereby effectively improving the uniformity of preheating. By heating water and allowing the water to circulate in the preheating columns, the heat of the water exchanges heat with the base film in a convection manner, thereby effectively preventing excessive preheating of the base film. An infrared thermal monitor is arranged above the base film to monitor the preheating situation in real time. When the preheating is insufficient or excessive, the infrared thermal monitor adjusts and controls the electric heater and the electromagnet to adjust the heating temperature and the water flow rate, thereby effectively improving the preheating effect of the base film.

[0006] Realize adaptive control of base film preheating to effectively prevent insufficient and excessive preheating of the base film.

[0007] Furthermore, the preheating column includes a heat-conducting column, and the inner wall of the heat-conducting column is provided with a heat exchange cavity connected to the wavy line circulation flow channel. The outer surface of the heat-conducting column is fixedly connected to a heat exchange membrane, and the upper inner wall of the heat-conducting column is fixedly embedded with a heat-conducting rod that penetrates into the heat exchange cavity. The heated water circulates in the heat exchange cavity, and the heat carried by the water is transferred to the heat-conducting column through the heat-conducting rod. The heat-conducting column then transfers the heat to the heat exchange membrane. The base membrane contacts the top of the heat exchange membrane in a linear manner, thereby realizing segmented heating of the base membrane, effectively preventing the base membrane from being over-preheated.

[0008] Furthermore, a water pressure adaptive elastic pad is fixedly connected to the inner wall of the heat exchange chamber, and the water pressure adaptive elastic pad is made of waterproof elastic material. When the water flow rate flowing through the heat exchange chamber increases, the water pressure adaptive elastic pad is compressed by the water pressure, thereby expanding the flow inner diameter of the heat exchange chamber and effectively increasing the water flow rate. When the water flow rate decreases, the water pressure adaptive elastic pad reduces the flow inner diameter of the heat exchange chamber, thereby realizing the role of the water pressure adaptive elastic pad in assisting in regulating the water flow rate.

[0009] Furthermore, the magnetism of the two magnetic concave-convex control parts is the same as the magnetism generated by the electromagnet, and the two magnetic concave-convex control parts match each other. The magnetism generated by the electromagnet repels the magnetic concave-convex control parts. The two magnetic concave-convex control parts approach each other and clamp the rubber water pipe, thereby achieving control of water flow.

[0010] Furthermore, the balancing connector has a multi-fold structure and is made of polyurethane elastic material. The balancing connector serves to connect the two magnetic concave-convex control pipes and reset them. The elastic force of the balancing connector counteracts the elastic force of the electromagnet on the magnetic concave-convex control pipes, making it easier to control the cross-sectional size of the rubber water pipe through the electromagnet.

[0011] Optionally, a column sleeve is provided on each preheating column, a shape memory alloy plate is fixedly connected to the upper side wall of the preheating seat, and the shape memory alloy plate is fixedly connected to the lower end of the column sleeve by a plurality of pull ropes, and the inner wall of the preheating seat is fixedly inlaid with a heat conductor fixedly connected to the shape memory alloy plate, and the lower end of the heat conductor extends into the wavy circulation flow channel. When the water temperature reaches a temperature that can cause excessive preheating of the base membrane, the heat conductor transfers the heat of the water to the shape memory alloy plate, and the shape memory alloy plate begins to bend downward from the initial state due to heat deformation. While the shape memory alloy plate bends downward, the column sleeve is pulled down by the pull rope, and the column sleeve then pulls the preheating column downward, allowing the preheating column to break contact with the base membrane, thereby reducing the amount of contact between the preheating column and the base membrane, thereby weakening the heat exchange effect, and effectively preventing the base membrane from being excessively preheated.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] (1) This scheme preheats the base film in a linear manner by setting up multiple preheating columns, so that the base film exchanges heat with the preheating columns in a linear contact manner during movement, effectively improving the uniformity of preheating. By heating water and allowing the water to circulate in the preheating columns, the heat of the water exchanges heat with the base film in a convection manner, effectively preventing excessive preheating of the base film. An infrared thermal monitor is set above the base film to monitor the preheating situation in real time. When the preheating is insufficient or excessive, the infrared thermal monitor adjusts and controls the electric heater and electromagnet to adjust the heating temperature and water flow, thereby effectively improving the preheating effect of the base film, realizing adaptive regulation of the preheating of the base film, and effectively preventing insufficient or excessive preheating of the base film.

[0014] (2) The preheating column includes a heat-conducting column, and the inner wall of the heat-conducting column is provided with a heat exchange cavity connected to the wavy line circulation flow channel. The outer surface of the heat-conducting column is fixedly connected with a heat exchange membrane, and the upper inner wall of the heat-conducting column is fixedly embedded with a heat-conducting rod that penetrates the heat exchange cavity. The heated water circulates in the heat exchange cavity, and the heat carried by the water is transferred to the heat-conducting column through the heat-conducting rod. The heat-conducting column then transfers the heat to the heat exchange membrane. The base membrane contacts the top of the heat exchange membrane in a linear manner, thereby realizing segmented heating of the base membrane and effectively preventing the base membrane from being over-preheated.

[0015] (3) The inner wall of the heat exchange chamber is also fixedly connected with a water pressure adaptive elastic gasket, and the water pressure adaptive elastic gasket is made of waterproof elastic material. When the water flow through the heat exchange chamber increases, the water pressure adaptive elastic gasket is compressed by the water pressure, thereby expanding the flow inner diameter of the heat exchange chamber and effectively increasing the water flow. When the water flow decreases, the water pressure adaptive elastic gasket reduces the flow inner diameter of the heat exchange chamber, thereby realizing the role of the water pressure adaptive elastic gasket in assisting in regulating the water flow.

[0016] (4) The magnetism of the two magnetic concave-convex control parts is the same as the magnetism generated by the electromagnet, and the two magnetic concave-convex control parts match each other. The magnetism generated by the electromagnet repels the magnetic concave-convex control parts. The two magnetic concave-convex control parts approach each other and clamp the rubber water pipe, thereby achieving control of water flow.

[0017] (5) The balancing connector has a multi-fold structure and is made of polyurethane elastic material. The balancing connector serves to connect the two magnetic concave-convex control components and reset them. The elastic force of the balancing connector counteracts the elastic force of the electromagnet on the magnetic concave-convex control components, making it easier to adjust the cross-sectional size of the rubber water pipe through the electromagnet.

[0018] (6) A column sleeve is placed on each preheating column, and a shape memory alloy plate is fixedly connected to the upper side wall of the preheating seat, and the shape memory alloy plate is fixedly connected to the lower end of the column sleeve through a plurality of pull ropes. A heat conductor fixedly connected to the shape memory alloy plate is fixedly embedded in the inner wall of the preheating seat, and the lower end of the heat conductor extends through the wavy circulation flow channel. When the water temperature reaches a temperature that can cause excessive preheating of the base membrane, the heat conductor transfers the heat of the water to the shape memory alloy plate. The shape memory alloy plate begins to bend downward from the initial state due to heat deformation. While the shape memory alloy plate bends downward, the column sleeve is pulled down by the pull rope, and the column sleeve then pulls the preheating column downward, so that the preheating column is out of contact with the base membrane, thereby reducing the number of contacts between the preheating column and the base membrane, thereby weakening the heat exchange effect, and effectively preventing the base membrane from being excessively preheated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of the preheating seat of the present invention;

[0020] Figure 2 This is a front view of the present invention in a normal preheating state;

[0021] Figure 3 This is a front view of the present invention in the over-preheated state;

[0022] Figure 4 A top view of the magnetic concave-convex control member of the present invention before adjustment;

[0023] Figure 5 A top view of the magnetic concave-convex control member of the present invention during regulation;

[0024] Figure 6 It is a cross-sectional view of the preheating column of the present invention;

[0025] Figure 7 This is a working state diagram of the shape memory alloy plate of the present invention before deformation;

[0026] Figure 8 This is a diagram of the working state of the shape memory alloy plate of the present invention after deformation.

[0027] Description of the numbers in the figure:

[0028] 1 preheating box, 2 preheating seat, 201 water cavity, 202 circulation cavity, 203 wavy line circulation flow channel, 204 control cavity, 3 preheating column, 301 heat conductive column, 302 heat exchange cavity, 303 heat exchange membrane, 304 water pressure adaptive elastic liner, 305 heat conductive rod, 4 electric heater, 5 water pump, 6 infrared thermal monitor, 7 rubber water pipe, 8 electromagnet, 9 magnetic concave-convex control pipe part, 10 balance connector, 11 column sleeve, 12 shape memory alloy plate, 13 heat conductive part. DETAILED DESCRIPTION

[0029] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solutions of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention.

[0030] A base film coating production line with a biaxial stretching device, see Figure 1 、 2 and Figure 6 , including a preheating box 1, both side walls of the preheating box 1 are provided with through openings, and the base film passes through the through openings, the bottom of the preheating box 1 is fixedly connected to a preheating seat 2, and the inner wall of the preheating seat 2 is provided with a water cavity 201 filled with water, and both sides of the inner wall of the preheating seat 2 are provided with a circulation cavity 202 connected to the water cavity 201, and the two circulation cavities 202 are distributed up and down, and the upper inner wall of the preheating seat 2 is provided with a wavy line circulation flow channel 203 connected to the circulation cavity 202, the preheating The upper side wall of the seat 2 is fixedly connected with a plurality of preheating columns 3 distributed at equal intervals, and the interior of the preheating column 3 is connected to the wavy line circulation flow channel 203. The preheating column 3 includes a heat-conducting column 301, and the inner wall of the heat-conducting column 301 is provided with a heat exchange cavity 302 connected to the wavy line circulation flow channel 203. The outer surface of the heat-conducting column 301 is fixedly connected with a heat exchange membrane 303, and the upper inner wall of the heat-conducting column 301 is fixedly inlaid with a heat exchange membrane 303 that penetrates the heat exchange cavity 302. The heat-conducting rod 305 in the heat exchange chamber 302, the heated water circulates, and the heat carried by the water is transferred to the heat-conducting column 301 through the heat-conducting rod 305, and the heat-conducting column 301 further transfers the heat to the heat exchange membrane 303. The base membrane contacts the top of the heat exchange membrane 303 in a linear manner, thereby realizing segmented heating of the base membrane, effectively preventing the base membrane from being over-preheated. The inner wall of the heat exchange chamber 302 is also fixedly connected to a water pressure adaptive elastic gasket 304, and the water pressure adaptive elastic gasket 304 is made of a waterproof elastic material. When the water flow through the heat exchange chamber 302 increases, the water pressure adaptive elastic gasket 304 is compressed by the water pressure, thereby expanding the flow inner diameter of the heat exchange chamber 302, effectively increasing the water flow. When the water flow decreases, the water pressure adaptive elastic gasket 304 reduces the flow inner diameter of the heat exchange chamber 302, thereby realizing the role of the water pressure adaptive elastic gasket 304 in assisting in regulating the water flow.

[0031] See also Figure 2 、 3 The base film is mounted on the upper end of the preheating column 3, an electric heater 4 is installed inside the water cavity 201, and a water pump 5 connected to the circulation cavity 202 is installed inside the water cavity 201. An infrared thermal monitor 6 is installed on the inner wall of the upper end of the preheating box 1. The infrared thermal monitor 6 includes a temperature monitoring module, a heating control module and a heat exchange control module. The heating control module is electrically connected to the electric heater 4 through a control processor.

[0032] Based on Example 1, please refer to Figure 4 、 5 , the inner wall of the preheating seat 2 near the water pump 5 is also provided with a control chamber 204 connected to the circulation chamber 202, and the connection between the control chamber 204 and the circulation chamber 202 is fixedly connected with a rubber water pipe 7, and the inner walls on both sides of the control chamber 204 are installed with electromagnets 8, and the heat exchange control module is electrically connected to the electromagnet 8 through the control processor, and the inner wall of the control chamber 204 is slidably connected with a magnetic concave-convex control pipe piece 9 that repels the electromagnet 8. The magnetism of the two magnetic concave-convex control pipe pieces 9 is the same as the magnetism generated by the electromagnet 8, and the two magnetic concave-convex control pipe pieces 9 match each other. The magnetism generated by the electromagnet 8 repels the magnetic concave-convex control pipe piece 9, and the two magnetic The concave-convex control members 9 are close to each other and clamp the rubber water pipe 7, thereby achieving control of the water flow rate, and the two magnetic concave-convex control members 9 are distributed on both sides of the rubber water pipe 7. A balancing connector 10 is fixedly connected between the two magnetic concave-convex control members 9. The balancing connector 10 has a multi-fold structure and is made of polyurethane elastic material. The balancing connector 10 connects the two magnetic concave-convex control members 9 and resets them. The elastic force of the balancing connector 10 counteracts the elastic force of the electromagnet 8 on the magnetic concave-convex control member 9, which makes it easy to control and adjust the cross-sectional size of the rubber water pipe 7 through the electromagnet 8.

[0033] See also Figure 7 、 8 , a column sleeve 11 is sleeved on each preheating column 3, and a shape memory alloy plate 12 is fixedly connected to the upper side wall of the preheating seat 2, and the shape memory alloy plate 12 is fixedly connected to the lower end of the column sleeve 11 through multiple pull ropes. The inner wall of the preheating seat 2 is fixedly inlaid with a heat conductor 13 fixedly connected to the shape memory alloy plate 12, and the lower end of the heat conductor 13 passes through the wavy circulation flow channel 203. When the water temperature reaches a temperature that can cause excessive preheating of the base membrane, the heat conductor 13 transfers the heat of the water to the shape memory alloy plate 12. The shape memory alloy plate 12 is deformed by heat and begins to bend downward from the initial state. While the shape memory alloy plate 12 bends downward, the column sleeve 11 is pulled down by the pull rope, and the column sleeve 11 then pulls the preheating column 3 downward, so that the preheating column 3 is out of contact with the base membrane, thereby reducing the number of contacts between the preheating column 3 and the base membrane, thereby weakening the heat exchange effect, thereby effectively preventing the base membrane from being excessively preheated.

[0034] The working principle of this solution is as follows: the base membrane passes through the interior of the preheating box 1 and is mounted on the preheating column 3, and contacts the preheating column 3 in a line segment manner. The electric heater 4 heats the water, and the water pump 5 transports the water to the circulation chamber 202. The water flows through the wavy circulation flow channel 203 and the heat exchange chamber 302 and returns to the water chamber 201 to achieve circulation flow. When the water flows through the heat exchange chamber 302, the heat carried by the water is transferred to the heat conducting column 301 through the heat conducting rod 305, and the heat conducting column 301 then transfers the heat to the heat exchange membrane 303. The base membrane contacts the top of the heat exchange membrane 303 in a linear manner, thereby realizing line segment heating of the base membrane, effectively preventing the base membrane from being over-preheated. The infrared thermal monitor 6 monitors the temperature of the base membrane. When the preheating is insufficient or over-preheated, the heating control module adjusts the heating temperature of the electric heater 4 through the control processor, and the heat exchange control module controls The processor adjusts the current and thus adjusts the magnetic force of the electromagnet 8. The magnetic repulsion of the electromagnet 8 on the magnetic concave-convex control component 9 causes the magnetic concave-convex control component 9 to clamp the rubber water pipe 7, thereby achieving the regulation of the water flow rate in the rubber water pipe 7. In this way, the water flow rate of the heat exchange chamber 302 can be regulated and controlled, thereby controlling the heat exchange effect. In addition, when the water temperature reaches a temperature that can cause excessive preheating of the base membrane, the heat conductor 13 transfers the heat of the water to the shape memory alloy plate 12. The shape memory alloy plate 12 is deformed by heat and begins to continue to bend downward from the initial state. While the shape memory alloy plate 12 bends downward, the column sleeve 11 is pulled down by the pull rope. The column sleeve 11 then pulls the preheating column 3 downward, allowing the preheating column 3 to break contact with the base membrane, thereby reducing the amount of contact between the preheating column 3 and the base membrane, thereby weakening the heat exchange effect, thereby effectively preventing the base membrane from being excessively preheated.

[0035] The above description is merely the best implementation mode adopted by the present invention in combination with current practical needs, but the protection scope of the present invention is not limited thereto.

Claims

1. A base film coating production line with a biaxial stretching device, comprising a preheating box (1), characterized in that: The side walls of the preheating box (1) are provided with through openings, and the base film passes through the through openings. The bottom of the preheating box (1) is fixedly connected to the preheating seat (2), and the inner wall of the preheating seat (2) is provided with a water cavity (201) filled with water. The inner walls of the preheating seat (2) are provided with circulation cavities (202) connected to the water cavity (201), and the two circulation cavities (202) are distributed up and down. The upper inner wall of the preheating seat (2) is provided with a wavy line circulation flow channel (203) connected to the circulation cavity (202). The upper side wall of the preheating seat (2) is fixedly connected with a plurality of equally spaced The preheating column (3) is distributed, and the interior of the preheating column (3) is connected to the wavy line circulation flow channel (203), the base film is mounted on the upper end of the preheating column (3), the interior of the water cavity (201) is equipped with an electric heater (4), and the interior of the water cavity (201) is equipped with a water pump (5) connected to the circulation cavity (202), and the upper inner wall of the preheating box (1) is equipped with an infrared thermal monitor (6), the infrared thermal monitor (6) includes a temperature monitoring module, a heating control module and a heat exchange control module, and the heating control module is electrically connected to the electric heater (4) through a control processor; The inner wall of the preheating seat (2) near the water pump (5) is further provided with a control chamber (204) connected to the circulation chamber (202); a rubber water pipe (7) is fixedly connected to the connection between the control chamber (204) and the circulation chamber (202); electromagnets (8) are installed on the inner walls on both sides of the control chamber (204); and the heat exchange control module is electrically connected to the electromagnet (8) through a control processor; a magnetic concave-convex control pipe member (9) that repels the electromagnet (8) is slidably connected to the inner wall of the control chamber (204); and the two magnetic concave-convex control pipe members (9) are distributed on both sides of the rubber water pipe (7); and a balancing connector (10) is fixedly connected between the two magnetic concave-convex control pipe members (9); The preheating column (3) includes a heat-conducting column (301), and the inner wall of the heat-conducting column (301) is provided with a heat exchange cavity (302) in communication with the wavy line circulation flow channel (203); the outer surface of the heat-conducting column (301) is fixedly connected with a heat exchange membrane (303), and the upper inner wall of the heat-conducting column (301) is fixedly inlaid with a heat-conducting rod (305) that penetrates the heat exchange cavity (302); the inner wall of the heat exchange cavity (302) is also fixedly connected with a water pressure self-adaptive elastic liner (304), and the water pressure self-adaptive elastic liner (304) is made of a waterproof elastic material; A column sleeve (11) is sleeved on each of the preheating columns (3); a shape memory alloy plate (12) is fixedly connected to the upper side wall of the preheating seat (2); and the shape memory alloy plate (12) is fixedly connected to the lower end of the column sleeve (11) through a plurality of pull ropes; a heat conducting member (13) fixedly connected to the shape memory alloy plate (12) is fixedly inlaid on the inner wall of the preheating seat (2), and the lower end of the heat conducting member (13) extends through the wavy line circulation flow channel (203).

2. A base film coating production line with a biaxial stretching device according to claim 1, characterized in that: The magnetism of the two magnetic concave-convex control components (9) is the same as the magnetism generated by the electromagnet (8), and the two magnetic concave-convex control components (9) match each other.

3. The base film coating production line with a biaxial stretching device according to claim 1, characterized in that: The balancing connector (10) is a multi-fold structure, and the balancing connector (10) is made of polyurethane elastic material.

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