Film transverse drawing imidization heating device and film transverse drawing device

Abstract

The utility model belongs to the field of film processing, and particularly relates to a film transverse-drawing imidization heating device and a film transverse-drawing device, which are applied to polyimide films and comprise a furnace chamber, a plurality of groups of heating pipes are mounted in the furnace chamber and are linearly arranged, and the heating pipes are linearly arranged and are perpendicular to the film conveying direction; and two groups of infrared heating units are mounted on the heating pipe, and are symmetrically distributed at the edge part of the furnace chamber left and right. According to the utility model, on the premise of keeping the heating mode of the original traditional heating tube, the heating power of the edge part of the film is controlled by variable-frequency voltage-regulating stepless control, connecting three groups of infrared heating lamp tubes in parallel at the transverse pulling edge part of the furnace chamber and utilizing the PLC, the solid-state power controller and the actuator, so that the film edge part can be automatically adjusted in real time according to the color requirement of the edge part of the film; therefore, the effect of improving the edge color difference and performance of the film is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of film processing, in particular to a film transverse imidization heating device and a film transverse stretching device. Background Art

[0002] Polyimide film is a new type of high temperature resistant organic polymer film, which is made by polycondensation and film exudation of pyromellitic anhydride (PMDA) and diaminodiphenyl ether (ODA) in a very strong solvent dimethylacetamide (DMAC), and then imidization. It is currently the best film insulation material in the world, with excellent mechanical properties, electrical properties, chemical stability, high radiation resistance, high temperature resistance and low temperature resistance (-269℃ to +400℃). It is now widely used in various fields such as aviation, navigation, spacecraft, rockets and missiles, atomic energy, and electronic and electrical industries. It is particularly suitable for use as a flexible printed circuit board substrate and various high temperature resistant motor and electrical insulation materials.

[0003] In the prior art, when a polyimide film is produced on a production line, the film is heated by a traditional heating tube. During the imidization process in the high-temperature zone inside the horizontal stretching, the edges are not heated enough, resulting in insufficient imidization of the edges of the film. There is an obvious color difference between the colors of the two sides and the middle. The width of a single side is about 12 cm, and the color difference area needs to be cut off, which is very wasteful. Utility Model Content

[0004] The utility model aims to provide a film transverse imidization heating device and a film transverse stretching device, which can overcome the problem of insufficient heating of the edge during the film transverse imidization process.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] The film transverse imidization heating device is applied to polyimide film, and comprises a furnace chamber, in which a plurality of heating tubes are installed, and the plurality of heating tubes are arranged in a straight line, and the straight line formed by the arrangement is perpendicular to the film conveying direction;

[0007] Two groups of infrared heating units are installed on the heating tube, and the two groups of infrared heating units are symmetrically arranged at the edge of the furnace cavity.

[0008] Based on the above technical solution, its use principle and the technical effects produced are as follows:

[0009] When heating is required, first start the film transport in the furnace cavity with the help of other equipment, and then start the heating tube for heating. Under the premise of retaining the original traditional heating method of the heating tube, three groups of infrared heating lamps are connected in parallel at the horizontal edge of the furnace cavity through variable frequency voltage regulation stepless control. The heating power of the edge of the film is controlled by PLC controller, solid-state power controller and actuator. It can be automatically adjusted in real time according to the color requirements of the edge of the film, thereby improving the color difference and performance of the edge of the film.

[0010] In a preferred example, the present invention can be further configured as follows: brackets are installed on both sides of the furnace cavity.

[0011] In a preferred example, the present invention can be further configured as follows: the multiple groups of heating tubes and the infrared heating units are powered by an external power supply.

[0012] In a preferred example, the utility model can be further configured as follows: the infrared heating unit is configured as an infrared heating lamp tube, and the number of each group of infrared heating lamp tubes is set to three.

[0013] In a preferred example, the utility model can be further configured as follows: the device also includes a PLC controller, a solid-state power controller and an actuator.

[0014] In a preferred example, the utility model can be further configured as follows: the PLC controller, solid-state power controller, actuator and infrared heating lamp tube form a closed-loop control system.

[0015] In a preferred example, the present invention can be further configured as follows: the heating tube and the infrared heating unit are connected in parallel.

[0016] According to one aspect of the utility model, the utility model provides a film transverse stretching device, which includes the film transverse stretching imidization heating device.

[0017] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0018] Fixed connection refers to a connection in which parts or components are fixed without any relative movement. There are two types of connection: detachable and non-detachable.

[0019] (1) A removable connection is a connection that uses screws, splines, wedge pins, etc. to hold parts together. This type of connection can be disassembled for maintenance without damaging the parts. However, the specifications of the connectors used must be correct (such as the length of the bolts, keys, and wedge pins) and they must be properly tightened.

[0020] (2) Non-detachable connections mainly refer to welding, riveting and tenoning. Since they need to be disassembled by forging, sawing or oxygen cutting for maintenance or replacement, spare parts generally cannot be reused. At the same time, when making connections, attention should be paid to process quality, technical inspection and remedial measures (such as calibration, polishing, etc.);

[0021] An active connection is a connection in which parts or components are fixed so that they can move relative to each other.

[0022] The above technical solution of the utility model has the following beneficial technical effects:

[0023] In the utility model, under the premise of retaining the original traditional heating tube heating method, three groups of infrared heating lamps are connected in parallel at the horizontal edge position of the furnace chamber through variable frequency voltage regulation stepless control, and the heating power of the edge of the film is controlled by using a PLC controller, a solid-state power controller, and an actuator. It can be automatically adjusted in real time according to the color requirements of the edge of the film, thereby improving the color difference and performance of the edge of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work. These and other features, aspects and advantages of the present invention can be better understood by reading the following detailed description with reference to the drawings, wherein the same symbols represent the same parts in all the drawings, wherein:

[0025] Figure 1 It is a schematic diagram of the prior art heating structure of the utility model;

[0026] Figure 2 It is a schematic diagram of an embodiment structure of the utility model;

[0027] Figure 3 A control program diagram of an embodiment of the utility model;

[0028] Figure 4 The following is a circuit diagram of an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1. Furnace cavity; 2. Heating tube; 3. Infrared heating unit; 4. Bracket; 5. Wiring terminal. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments of the present utility model and the features in the embodiments can be combined with each other without conflict.

[0032] According to the concept of this application, Figures 1 to 4 The following is an embodiment of a film transverse imidization heating device for heating a film. Specifically, the film transverse imidization heating device is constructed as an integrated structure, which has three components, namely, a furnace chamber 1, a heating tube 2, and an infrared heating unit 3. Under the premise of retaining the original traditional heating method of the heating tube 2, three groups of infrared heating lamps are connected in parallel at the transverse edge position of the furnace chamber 1 through variable frequency voltage regulation stepless control, and the heating power of the edge of the film is controlled by a PLC controller, a solid-state power controller, and an actuator. It can be automatically adjusted in real time according to the color requirements of the edge of the film, thereby improving the color difference and performance of the edge of the film.

[0033] like Figure 1 As shown, it is a schematic diagram of the traditional heating method in the prior art. In the traditional structure, the film is heated only by the traditional heating tube 2 during the transverse imidization process. However, there is a temperature difference between the edge temperature and the center temperature of the furnace chamber 1. Due to insufficient heating and poor uniformity at the edge, the imidization of the edge of the film is different, resulting in color difference.

[0034] Combination Figure 2 As shown, the film transverse imidization heating device provided by the utility model comprises a furnace chamber 1, in which a plurality of groups of heating tubes 2 are installed, and the plurality of groups of heating tubes 2 are arranged in a straight line, and the straight line formed by the arrangement is perpendicular to the film conveying direction;

[0035] Two groups of infrared heating units 3 are arranged in parallel on the heating tube 2 , and the two groups of infrared heating units 3 are symmetrically arranged at the edge of the furnace cavity 1 .

[0036] Brackets 4 are installed on both sides of the furnace cavity 1, and the brackets 4 are used to provide support for the heated furnace cavity 1. It should be noted that the brackets 4 can be set to high-temperature resistant metals such as ferritic stainless steel or chromium alloy. For the technical solution of this application, the brackets 4 are made of ferritic stainless steel.

[0037] According to the technical solution of the present application, the multiple groups of heating tubes 2 and the infrared heating units 3 are powered by an external power source, and the heating tubes 2 and the infrared heating units 3 are connected to external wires via the wiring terminals 5 .

[0038] With respect to the technical solution of the present application, the infrared heating unit 3 is configured as an infrared heating lamp tube, and the number of each group of infrared heating lamp tubes is set to three. The heat transfer form of infrared rays is radiation heat transfer, and energy is transferred by electromagnetic waves. When far-infrared rays irradiate the heated object, part of the rays are reflected back and part are penetrated. When the wavelength of the emitted far-infrared rays is consistent with the absorption wavelength of the heated object, the heated object absorbs the far-infrared rays. At this time, the molecules and atoms inside the object "resonate" - strong vibrations and rotations are generated, and the vibrations and rotations increase the temperature of the object. By utilizing the faster and more uniform characteristics of infrared heating radiation, the heating effect of the edge of the furnace cavity 1 can be significantly improved.

[0039] It should be noted that the device as a whole also includes a PLC controller (not shown in the figure), a solid-state power controller (not shown in the figure) and an actuator (not shown in the figure).

[0040] Programmable Logic Controller (PLC) is a digital computing controller with a microprocessor for automatic control. It can load control instructions into memory at any time for storage and execution. The programmable controller consists of CPU, instruction and data memory, input / output interface, power supply, digital analog conversion and other functional units. The early programmable logic controller only had the function of logic control, so it was named programmable logic controller. Later, with the continuous development, these computer modules with simple functions at the beginning have various functions including logic control, timing control, analog control, multi-machine communication, etc., and the name was changed to programmable controller.

[0041] A solid-state power controller (SSPC) is an intelligent switching device that integrates the switching function of a relay and the circuit protection function of a circuit breaker.

[0042] The actuator is a combination of an actuator and a control valve in an automatic control system. Its role in the automatic control system is to receive signals from a regulator or computer (DCS, PLC, etc.), and to adjust the flow of the process medium based on its position and characteristics in the process pipeline, so that the controlled automatic instrument is within the range required by the production process; in the process control system, the actuator consists of an actuator and an automatic regulating mechanism. The automatic regulating mechanism directly changes the parameters of the production process through the actuator so that the production process meets the predetermined requirements, and the actuator receives the control signal from the controller and converts it into the output of the drive regulating mechanism (such as angular displacement or linear displacement output).

[0043] According to the technical solution of the present application, a PLC controller, a solid-state power controller, an actuator and an infrared heating lamp form a closed-loop control system: after the temperature signal is calculated by the PLC logic and the PID algorithm, a calculus digital pulse drive control signal is output to the solid-state controller and the actuator to drive and control the output duty cycle of the solid-state controller, thereby controlling the heating power of the infrared heating unit 3, thereby achieving efficient and stable temperature control, achieving consistency in the edge and middle temperatures, and improving the color difference problem of the carbon-based film.

[0044] Specifically, when heating is required, first start the film to be transported in the furnace chamber 1 with the help of other equipment, and then start the heating tube 2 for heating. Under the premise of retaining the original traditional heating method of the heating tube 2, three groups of infrared heating lamps are connected in parallel at the horizontal edge position of the furnace chamber 1 through variable frequency voltage regulation stepless control. The heating power of the edge of the film is controlled by a PLC controller, a solid-state power controller, and an actuator. It can be automatically adjusted in real time according to the color requirements of the edge of the film, thereby improving the color difference and performance of the edge of the film.

[0045] The following is a further description of the thin film transverse imidization heating device provided by the utility model in conjunction with the accompanying drawings and implementation examples.

[0046] The film transverse imidization heating device comprises a furnace chamber 1, wherein a plurality of heating tubes 2 are installed in the furnace chamber 1, and the plurality of heating tubes 2 are arranged in a straight line, and the straight line formed by the arrangement is perpendicular to the film conveying direction;

[0047] Two groups of infrared heating units 3 are arranged in parallel on the heating tube 2 , and the two groups of infrared heating units 3 are symmetrically arranged at the edge of the furnace cavity 1 .

[0048] The working principle and use process of the utility model are as follows: when heating is required, first start to transport the film in the furnace chamber 1 with the help of other equipment, and then start the heating tube 2 for heating. Under the premise of retaining the original traditional heating method of the heating tube 2, three groups of infrared heating lamps are connected in parallel at the horizontal edge position of the furnace chamber 1 through variable frequency voltage regulation stepless control. The heating power of the edge of the film is controlled by a PLC controller, a solid-state power controller, and an actuator. It can be automatically adjusted in real time according to the color requirements of the edge of the film, thereby improving the color difference and performance of the edge of the film.

[0049] In the present utility model, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The term "and / or" used in this article includes any and all combinations of one or more related listed items. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0050] It should be noted that when an element is referred to as being "assembled on", "installed on", "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0051] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. Film transverse imidization heating device, applied to polyimide film, characterized in that: It comprises a furnace chamber (1), wherein a plurality of groups of heating tubes (2) are installed in the furnace chamber (1), and the plurality of groups of heating tubes (2) are arranged in a straight line, and the straight line formed by the arrangement is perpendicular to the film conveying direction; Two groups of infrared heating units (3) are installed on the heating tube (2), and the two groups of infrared heating units (3) are symmetrically arranged at the edge of the furnace cavity (1).

2. The film transverse imidization heating device according to claim 1, characterized in that: Brackets (4) are installed on both sides of the furnace cavity (1).

3. The film transverse imidization heating device according to claim 2, characterized in that: The multiple groups of heating tubes (2) and the infrared heating unit (3) are powered by an external power source.

4. The film transverse imidization heating device according to claim 2, characterized in that: The infrared heating units (3) are configured as infrared heating lamp tubes, and the number of infrared heating lamp tubes in each group is configured as three.

5. The film transverse imidization heating device according to claim 4, characterized in that: It also includes PLC controllers, solid-state power controllers, and actuators.

6. The film transverse imidization heating device according to claim 5, characterized in that: The PLC controller, solid-state power controller, actuator and infrared heating lamp tube form a closed-loop control system.

7. The film transverse imidization heating device according to claim 1, characterized in that: The heating tube (2) and the infrared heating unit (3) are connected in parallel.

8. A film transverse stretching device, characterized in that: It comprises the film transverse drawing imidization heating device according to any one of claims 1 to 7.

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