A high-temperature oxygen-free online cyclization equipment

Abstract

The present invention relates to a high-temperature oxygen-free online cyclization device. A horizontal conveying mechanism and a temperature-averaging heating system are set up in the inner cavity of a box body. The conveying mechanism comprises a plurality of temperature-averaging heat conduction plates arranged in parallel along the conveying direction. The conveying mechanism also comprises a plurality of pressing rollers located above the temperature-averaging heat conduction plates and cooperating with adjacent temperature-averaging heat conduction plates to flatten a material film. A pressure-stabilizing nitrogen cavity is provided in an electric heating plate in the temperature-averaging heating system. A plurality of nitrogen outlet holes are provided on the bottom surface of the electric heating plate in the upper heating mechanism and on the top surface of the electric heating plate in the lower heating mechanism. Nitrogen inlets communicating with the pressure-averaging nitrogen cavity are provided on the side walls on both sides of the electric heating plate. A circulation pipeline is provided outside the box body. The present invention effectively prevents oxidation of materials due to high temperature by introducing nitrogen into the temperature-averaging heat conduction plate, reduces thermal expansion and contraction of the temperature-averaging heat conduction plate, and improves the temperature-averaging performance of heating, so that temperature-averaging heating of various precision materials at different temperatures can be achieved under different temperature conditions.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical structures, in particular to a high-temperature oxygen-free online cyclization device. Background Art

[0002] Under the protection of inert gas, the material is evenly heated to above 300 degrees. In ordinary online high-temperature equipment systems, air circulation heating is relied on to achieve the heating purpose. However, when the oxygen content in the air reaches more than 20%, most materials will react chemically with oxygen when the temperature reaches more than 250 degrees, resulting in oxidation, which destroys the properties and turns black in appearance, thus causing the product to be scrapped. If air circulation heating is not used, the temperature in each area of ​​the equipment cannot be evenly distributed, the temperature difference is extremely large, the product is heated unevenly, the product quality is unstable, and the yield is low.

[0003] In order to ensure that electronic materials can be evenly heated to above 300 degrees without being affected by oxidation, it is necessary to develop high-temperature oxygen-free online cyclization equipment.

[0004] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a high-temperature oxygen-free online cyclization equipment with greater industrial utilization value. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a method for effectively preventing oxidation of materials due to high temperature by introducing nitrogen into the temperature-averaging heat conduction plate, while reducing thermal expansion and contraction of the temperature-averaging heat conduction plate and improving the temperature-averaging performance of heating.

[0006] The high-temperature oxygen-free online circularization equipment of the present invention comprises a box body, in which a horizontal conveying mechanism and a plurality of groups of uniform temperature heating systems are set up in the inner cavity of the box body, the uniform temperature heating system comprises a lower heating mechanism located below the conveying mechanism and an upper heating mechanism located above the conveying mechanism, the conveying mechanism comprises a plurality of through-core shafts arranged in parallel along the conveying direction, the conveying mechanism further comprises a plurality of pressure rollers located above the through-core shafts and cooperating with adjacent through-core shafts to flatten the material film to prevent curling, the upper heating mechanism and the lower heating mechanism both comprise a hollow electric heating plate, a pressure-stabilizing nitrogen cavity is provided in the electric heating plate, A plurality of nitrogen outlet holes are provided on the bottom surface of the electric heating plate in the upper heating mechanism and on the top surface of the electric heating plate in the lower heating mechanism, a nitrogen inlet connected to the pressure-stabilizing nitrogen cavity is provided on the side walls on both sides of the electric heating plate, a circulation pipeline connected to the plurality of nitrogen inlets is provided outside the box body, a nitrogen flowmeter connected to the circulation pipeline and an oxygen detector connected to the inner cavity of the box body are provided outside the box body, an electric heating pipe is arranged in the inner cavity of the electric heating plate, and the number of turns of the heating wire wound outside the electric heating pipe and located in the middle of the electric heating pipe is less than the number of turns of the heating wire located at both ends of the electric heating pipe.

[0007] As a further improvement of the present invention, the bearings at both ends of the through-shaft and the pressure roller are fixed on the side plates of the conveying mechanism.

[0008] As a further improvement of the present invention, an electrical cabinet is provided at the bottom of the box.

[0009] As a further improvement of the present invention, another set of temperature-averaging heating systems which can be raised and lowered and is located above the conveying mechanism is also set up in the box.

[0010] As a further improvement of the present invention, the electric heating plate is a high temperature resistant aluminum plate, and the aluminum plate is coated with a temperature-uniform and anti-sticking thermal conductive coating.

[0011] By means of the above scheme, the present invention has at least the following advantages:

[0012] 1. Design of nitrogen circulation pipeline: nitrogen circulation pipelines are installed on both sides of the equipment to introduce nitrogen into the electric heating plate. Before heating, nitrogen is introduced into the box to gradually reduce the oxygen content and finally reach a zero oxygen state to prevent the material from reacting with oxygen after high temperature;

[0013] 2. Nitrogen flow design: the upper and lower layers of the equipment and the nitrogen circulation pipelines have independent flow meters to adjust and monitor the current flow for precise control;

[0014] 3. Oxygen concentration detection is to detect the oxygen concentration in the current equipment through an oxygen detector. Heating can be turned on when the concentration reaches below 0.3%, and the current oxygen concentration is monitored in real time;

[0015] 4. The aluminum plate of the electric heating plate is coated with a thermal conductive coating, so that the heat of the electric heating tube in the aluminum plate is first transferred to the thermal conductive coating, and then transferred to the surface of the material film through the thermal conductive coating, making the temperature more uniform;

[0016] 5. Pass nitrogen into the heating plate: drill small holes with a diameter of 2mm evenly on the side of the heating plate, and then pass nitrogen into it. Use the nitrogen to take away the heat of the heating plate and evenly blow it onto the surface of the material film to achieve uniform heating;

[0017] 6. Use uniform temperature electric heating tubes: Ordinary electric heating tubes have a larger heat dissipation area at both ends, and the heat dissipation speed is faster than in the middle. Therefore, from the perspective of heat distribution, the temperature in the middle will be about 30 degrees higher than the temperature at both ends, so the temperature distribution is low at both ends and high in the middle. High-temperature cyclization equipment requires the temperature difference at each point to be controlled within ±1 degree, so all uniform temperature electric heating tubes are used, with more heating wires wound at both ends of the electric heating tube and less heating wires wound in the middle. The distribution ratio can be 35% on the left, 30% in the middle, and 35% on the right.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a perspective view of the inner cavity of the box of the high-temperature oxygen-free online cyclization equipment of the present invention;

[0021] Figure 2 yes Figure 1 A cross-sectional view of a set of electric heating plates.

[0022] 1 box 2 through the shaft

[0023] 3 pressure rollers 4 electric heating plates

[0024] 5 circulation pipeline 6 nitrogen flow meter

[0025] 7 oxygen detector 8 electric heating tube

[0026] 9 heating wire 10 side panel

[0027] 11Electrical cabinet 12Lifting mechanism

[0028] 13 Nitrogen filling port DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all the embodiments. The components of the embodiment of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiment of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0031] Example

[0032] Figure 1 and Figure 2 A high-temperature oxygen-free online cyclization device is shown, comprising a box body 1, a horizontal conveying mechanism and a plurality of uniform temperature heating systems are set up in the inner cavity of the box body 1, the uniform temperature heating system comprises a lower heating mechanism located below the conveying mechanism and an upper heating mechanism located above the conveying mechanism, the conveying mechanism comprises a plurality of through-core shafts 2 arranged in parallel along the conveying direction, the conveying mechanism also comprises a plurality of pressing rollers 3 located above the through-core shafts 2 and cooperating with adjacent through-core shafts 2 to flatten the material film, the upper heating mechanism and the lower heating mechanism both comprise a hollow electric heating plate 4, a pressure-stabilizing nitrogen chamber is provided in the electric heating plate 4, the bottom surface of the electric heating plate 4 in the upper heating mechanism and the electric heating plate 4 in the lower heating mechanism A plurality of nitrogen outlet holes are provided on the top surface, which can uniformly heat the upper and lower surfaces of the material film on the through-core shaft 2 of the conveying mechanism. At the same time, nitrogen inlets connected to the pressure-stabilizing nitrogen cavity are provided on the side walls on both sides of the electric heating plate 4. A circulation pipeline 5 connected to the plurality of nitrogen inlets is provided outside the box body 1 to ensure the supply of nitrogen in the electric heating plate 4. A nitrogen flowmeter 6 connected to the circulation pipeline 5 and an oxygen detector 7 connected to the inner cavity of the box body 1 are provided outside the box body 1. An electric heating tube 8 is arranged in the inner cavity of the electric heating plate 4. The number of turns of the heating wire 9 located in the middle of the electric heating tube 8 wound outside the electric heating tube 8 is less than the number of turns of the heating wire 9 located at both ends of the electric heating tube 8.

[0033] In this embodiment, the bearings at both ends of the through-shaft 2 and the pressure roller 3 are fixed on the side plate 10 of the conveying mechanism.

[0034] In this embodiment, an electrical cabinet 11 is provided at the bottom of the box body 1 .

[0035] In this embodiment, another set of uniform temperature heating system is also installed in the box body 1 and is located above the conveying mechanism and can be raised and lowered under the drive of the lifting mechanism 12 .

[0036] In this embodiment, the electric heating plate 4 is a high temperature resistant aluminum plate, and the aluminum plate is coated with a temperature-uniform and anti-sticking thermal conductive coating.

[0037] The principle of the present invention is:

[0038] 1. Design of nitrogen circulation pipeline: nitrogen circulation pipelines are installed on both sides of the box to introduce nitrogen into the electric heating plate. Before heating, nitrogen is introduced into the electric heating plate 4 in the box through the nitrogen filling port 13 to gradually reduce the oxygen content and finally reach a zero oxygen state to prevent the material from reacting with oxygen after high temperature;

[0039] 2. Nitrogen flow design: the upper and lower layers of the equipment and the nitrogen circulation pipelines have independent flow meters to adjust and monitor the current flow for precise control;

[0040] 3. Oxygen concentration detection is to detect the oxygen concentration in the current equipment through an oxygen detector. Heating can be turned on when the concentration reaches below 0.3%, and the current oxygen concentration is monitored in real time;

[0041] 4. The aluminum plate of the electric heating plate is coated with a temperature-averaging and anti-sticking thermal conductive coating, so that the heat of the electric heating tube in the aluminum plate is first transferred to the thermal conductive coating, and then the temperature-averaging and anti-sticking thermal conductive coating transfers the heat to the surface of the material film by heating the hot air, making the temperature more uniform;

[0042] 5. Pass nitrogen into the heating plate: drill small holes with a diameter of 2mm evenly on the side of the heating plate, and then pass nitrogen into it. Use the nitrogen to take away the heat of the heating plate and evenly blow it onto the surface of the material film to achieve uniform heating;

[0043] 6. Use uniform temperature electric heating tubes: Ordinary electric heating tubes have a larger heat dissipation area at both ends, and the heat dissipation speed is faster than in the middle. Therefore, from the perspective of heat distribution, the temperature in the middle will be about 30 degrees higher than the temperature at both ends, so the temperature distribution is low at both ends and high in the middle. High-temperature cyclization equipment requires the temperature difference at each point to be controlled within ±1 degree, so all uniform temperature electric heating tubes are used, with more heating wires wound at both ends of the electric heating tube and less heating wires wound in the middle. The distribution ratio can be 35% on the left, 30% in the middle, and 35% on the right.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly referring to the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A high-temperature oxygen-free online cyclization equipment, characterized in that: The invention comprises a box body (1), wherein a transverse conveying mechanism and a plurality of uniform temperature heating systems are arranged in the inner cavity of the box body (1), wherein the uniform temperature heating system comprises a lower heating mechanism located below the conveying mechanism and an upper heating mechanism located above the conveying mechanism, wherein the conveying mechanism comprises a plurality of through-core shafts (2) arranged in parallel along the conveying direction, wherein the conveying mechanism further comprises a plurality of pressing rollers (3) located above the through-core shafts (2) and cooperating with adjacent through-core shafts (2) to flatten the material film to prevent curling, wherein the upper heating mechanism and the lower heating mechanism both comprise a hollow electric heating plate (4), wherein a pressure-stabilizing nitrogen chamber is provided in the electric heating plate (4), and the bottom surface of the electric heating plate (4) in the upper heating mechanism and the bottom surface of the electric heating plate (4) in the upper heating mechanism and the A plurality of nitrogen outlet holes are provided on the top surface of the electric heating plate (4) in the lower heating mechanism, and nitrogen inlets connected to the pressure-stabilizing nitrogen chamber are provided on the side walls on both sides of the electric heating plate (4). A circulation pipeline (5) connected to the plurality of nitrogen inlets is provided outside the box (1), and a nitrogen flow meter (6) connected to the circulation pipeline (5) and an oxygen detector (7) connected to the inner cavity of the box (1) are provided outside the box (1). An electric heating tube (8) is arranged in the inner cavity of the electric heating plate (4), and the number of turns of the heating wire (9) located in the middle of the electric heating tube (8) wound outside the electric heating tube (8) is less than the number of turns of the heating wire (9) located at both ends of the electric heating tube (8); Another set of temperature-averaging heating systems that can be raised and lowered and located above the conveying mechanism is also installed in the box (1); The electric heating plate (4) is a high temperature resistant aluminum plate, and the aluminum plate is coated with a temperature-uniform and anti-sticking thermal conductive coating.

2. The high temperature oxygen-free online cyclization equipment according to claim 1, characterized in that: The bearings at both ends of the through-axis (2) and the pressure roller (3) are fixed on the side plate (10) of the transmission mechanism.

3. The high temperature oxygen-free online cyclization equipment according to claim 1, characterized in that: An electrical cabinet (11) is provided at the bottom of the box body (1).

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