Hot air device for improving wettability of PTFE glue and glass fabric

Abstract

The utility model discloses a hot air device for improving wettability of PTFE glue and glass fabric, which comprises hot air assemblies distributed on two sides of a drying area, the hot air assemblies are composed of hot air pipes distributed in an up-and-down hierarchy mode, and a plurality of air outlets are formed in one side, facing the drying area, of each hot air pipe. Each single row of air outlets is composed of a plurality of long and thin rectangular open holes which are distributed at intervals, and every two adjacent rows of air outlets are distributed in a staggered mode. Each hot air pipe is connected with an outlet of an air collecting box through an air inlet pipe, and an inlet of the air collecting box is connected with an air heater. According to the hot air blowing device, uniform hot air blowing is carried out on the glass cloth dipped with the PTFE glue through the slender rectangular holes in the hot air pipe, on one hand, a solvent of the PTFE glue is rapidly volatilized, the viscosity and the bonding effect of the glue are improved, and the wettability between the PTFE glue and the glass cloth is improved, on the other hand, residual bubbles in the PTFE glue are uniformly blown away, and meanwhile, uniform pressure is applied to the PTFE glue, so that the PTFE glue is uniformly heated. The PTFE glue can be better extruded into gaps between the glass cloth, and the wettability between the PTFE glue and the glass cloth is improved.

Description

Technical Field

[0001] This utility model belongs to the field of manufacturing and processing of PTFE series high-frequency copper-clad laminates for electronic materials, and relates to a hot air device for improving the wettability of PTFE adhesive and fiberglass cloth. Background Technology

[0002] PTFE (polytetrafluoroethylene) has a wide range of applications in the field of high-frequency communication due to its unique chemical stability, low dielectric constant and low loss factor.

[0003] However, the manufacturing process of PTFE high-frequency copper-clad laminates faces several key technical challenges. One is the poor wetting properties of PTFE adhesive on fiberglass cloth, coupled with the presence of air bubbles within the adhesive itself. These bubbles easily remain on the fiberglass cloth during the coating process. On one hand, they disrupt the surface smoothness of the PTFE film, resulting in large-area uneven coating. This uneven coating can cause signal distortion during high-frequency signal transmission, severely impacting the performance of the copper-clad laminate in high-frequency communication equipment. On the other hand, residual bubbles can also create weak points within the copper-clad laminate, reducing its overall reliability and stability, and shortening the product's lifespan. Utility Model Content

[0004] The purpose of this invention is to provide a hot air device that improves the wettability of PTFE adhesive and fiberglass cloth, thereby improving the wettability of PTFE adhesive on fiberglass cloth and eliminating the problem of air bubbles.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A hot air device for improving the wettability of PTFE adhesive and fiberglass cloth includes hot air assemblies distributed on both sides of a drying area. The hot air assemblies are composed of hot air pipes distributed in upper and lower layers. Each hot air pipe has several exhaust outlets on the side facing the drying area. Each row of exhaust outlets consists of several spaced, elongated rectangular openings, and adjacent rows of exhaust outlets are staggered. Each hot air pipe is connected to the outlet of an air collection box through an air inlet pipe, and the inlet of the air collection box is connected to a hot air blower 1.

[0007] As a further improvement of one embodiment of the present invention, a rotation adjustment mechanism is provided between the air inlet pipe and the hot air pipe, and the airflow of the air inlet pipe can flow into the hot air pipe.

[0008] As a further improvement of one embodiment of the present invention, the rotation adjustment mechanism includes a bearing, the end of the hot air pipe has a bearing cavity, the bearing is disposed in the bearing cavity, the air inlet pipe is inserted into the inner ring of the bearing and communicates with the hot air pipe; the end of the hot air pipe has a screw hole, the screw is threaded into the screw hole and can abut against the air inlet pipe.

[0009] As a further improvement of one embodiment of the present invention, a sealing ring is provided inside the bearing cavity, the sealing ring having an outwardly protruding lip that can abut against the inner ring of the bearing.

[0010] As a further improvement of one embodiment of this utility model, the air inlet pipe has a U-shaped structure.

[0011] As a further improvement of one embodiment of the present invention, the hot air device further includes a return air duct, which has a U-shaped structure, and both ends of the return air duct are connected to the hot air ducts on both sides through a rotation adjustment mechanism.

[0012] As a further improvement of one embodiment of the present invention, the hot air assembly consists of three horizontally placed hot air pipes, each of which has three rows of parallel air outlets.

[0013] As a further improvement of one embodiment of the present invention, it further includes an adjustment plate for placing the hot air duct, the two ends of which are mounted on a fixed bracket via damping shafts.

[0014] The above technical solution has the following beneficial effects: By blowing hot air evenly through the narrow rectangular openings on the hot air pipe onto the glass cloth impregnated with PTFE adhesive, on the one hand, the solvent of the PTFE adhesive evaporates quickly, improving the viscosity and bonding effect of the adhesive and enhancing the wettability between it and the glass cloth; on the other hand, it evenly disperses the air bubbles remaining in the PTFE adhesive and applies uniform pressure to the PTFE adhesive, allowing the PTFE adhesive to be better squeezed into the gaps between the glass cloth and improve the wettability between it and the glass cloth. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0017] Figure 1 A three-dimensional schematic diagram showing the interaction between the hot air assembly and the hot air blower provided by this utility model.

[0018] Figure 2 for Figure 1 Front view diagram.

[0019] Figure 3 This is another structural schematic diagram provided by the present invention.

[0020] Figure 4 for Figure 3 An enlarged schematic diagram of region A in the middle.

[0021] In the picture:

[0022] 1-Hot air blower;

[0023] 2-Air collection box;

[0024] 3-Air inlet duct;

[0025] 4-Hot air duct; 41-Opening;

[0026] 5-Return air duct;

[0027] 6- Rotary adjustment mechanism; 61- Bearing; 62- Sealing ring; 63- Screw hole. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model. Example

[0031] See Figures 1-2 As shown, a hot air device for improving the wettability of PTFE adhesive and fiberglass cloth includes hot air assemblies distributed on both sides of a drying zone. The hot air assemblies consist of hot air pipes 4 arranged in upper and lower layers. Each hot air pipe 4 has several exhaust vents facing the drying zone. Each exhaust vent consists of several spaced, elongated rectangular openings 41. The shape of the elongated rectangular openings 41 provides sufficient air pressure to break up air bubbles in the PTFE adhesive and better press the PTFE adhesive into the gaps between the fiberglass cloth. Furthermore, the staggered distribution of adjacent exhaust vents further ensures that the hot air covers the drying zone more comprehensively and evenly, avoiding localized overheating or uneven airflow.

[0032] Each hot air duct 4 is connected to the outlet of the air collection box 2 via an air inlet duct 3, and the inlet of the air collection box 2 is connected to the hot air blower 1. When the hot air blower 1 is started, the generated hot air will first be collected in the air collection box 2, and then distributed to each hot air duct 4 via the air inlet duct 3. Finally, it will be evenly blown into the drying area from the opening 41 of the hot air duct 4, so as to achieve uniform hot air blowing on the glass cloth after impregnation with PTFE adhesive. On the one hand, the solvent of PTFE adhesive will evaporate quickly, improve the viscosity and bonding effect of adhesive, and enhance the wettability between it and the glass cloth. On the other hand, it will evenly disperse the air bubbles remaining in PTFE adhesive, and at the same time apply uniform pressure to PTFE adhesive, so that PTFE adhesive can be better squeezed into the gaps between the glass cloth, and the wettability between it and the glass cloth will be improved.

[0033] In this embodiment, a high-power hot air blower 1 is selected. With the support of a hot air blower 1 with sufficient power, it is ensured that the output hot air has enough energy to achieve saturated, uniform and effective hot air blowing.

[0034] Each hot air duct 4 has three rows of parallel air outlets. When the hot air generated by the hot air blower is transmitted through the hot air duct, the three rows of parallel air outlets can blow the hot air out in a relatively uniform manner, so that the hot air can fully and evenly cover the drying area.

[0035] In this embodiment, the air inlet pipe 3 has a U-shaped structure. When the hot air generated by the hot air blower enters the air inlet pipe 3, the U-shaped design allows the hot air to flow more smoothly and evenly within the pipe, effectively avoiding instability such as excessively fast or slow local flow rates during transmission. Combined with the openings 41 on the hot air pipe 4, the hot air blown out from the openings can evenly cover every corner of the drying area, ensuring that the entire area receives uniform hot air blowing.

[0036] In this embodiment, the hot air assembly consists of three horizontally placed hot air pipes 4. Different hot air pipes can be selected for different types of adhesives and glass cloths, which can achieve refined energy consumption management. The three layers of hot air pipes are sufficient to improve the wetting properties of almost all existing PTFE adhesives and glass cloths.

[0037] In this embodiment, the hot air duct 4 has an adjustable angle, which is designed to meet the blowing requirements of different types and viscosities of PTFE adhesive.

[0038] Combination Figure 3 , Figure 4 As shown, the hot air device in this embodiment also includes a return air duct 5, which has a U-shaped structure, and the hot air ducts 4 on both sides are connected to the return air duct 5. The hot air in the hot air duct 4 will mix in the return air duct 5, making the flow of hot air in the duct more uniform, so that the blowing effect of hot air can evenly cover every area.

[0039] Because the hot air duct 4 in this embodiment needs to be adjustable in angle, therefore, as Figure 3 As shown, both ends of the hot air duct 4 are equipped with a rotary adjustment mechanism 6. One end of the corresponding air inlet duct 3 and one end of the return air duct 5 are installed on the rotary adjustment mechanism 6, thereby connecting the air inlet duct 3, the hot air duct 4, and the return air duct 5.

[0040] The rotating adjustment mechanisms 6 at both ends of the hot air duct 4 have the same structure. For ease of description, the rotating adjustment mechanism between the air inlet duct 3 and the hot air duct 4 will be used as an example for explanation.

[0041] like Figure 4As shown, the rotary adjustment mechanism 6 includes a bearing 61, and the end of the hot air duct 4 has a bearing cavity, within which the bearing 61 is housed. One end of the air inlet pipe 3 is inserted into and fixed to the inner ring of the bearing 61. The air inlet pipe 3 is mounted on the bearing 61 and communicates with the hot air duct 4. The end of the hot air duct 4 has a screw hole 63, into which a screw is threaded and engages with the air inlet pipe 3. When the angle of the hot air duct 4 needs adjustment, the screw is loosened, and the screw is no longer in contact with the air inlet pipe 3. The hot air duct 4 can then be adjusted independently (the screw between the hot air duct 4 and the return air duct 5 also needs to be loosened). Once the adjustment is complete, the screw is tightened to fix the air inlet pipe 3 to the hot air duct 4. Through this mechanical adjustment, the angle of the hot air duct 4 can be easily adjusted.

[0042] Preferably, a sealing ring 62 is also provided in the bearing cavity. The sealing ring 62 has an outwardly protruding lip that can abut against the inner ring of the bearing 61, thereby sealing the bearing 61 and effectively preventing hot air from the hot air pipe 4 from escaping from the gap of the bearing 61.

[0043] Of course, to improve the stability of the hot air duct 4 during use, each hot air duct 4 can be placed on an adjustment plate individually. The two ends of the adjustment plate are cleverly set on the fixed bracket through damping shafts. In this way, the adjustment plate can be flexibly rotated and adjusted relative to the fixed bracket, thereby achieving precise adjustment of the angle of the hot air duct 4.

[0044] This invention utilizes the elongated rectangular opening on the hot air pipe 4 to perform a uniform and effective hot air blowing operation on the glass cloth impregnated with PTFE adhesive.

[0045] On the one hand, under the action of hot air, the solvent in the PTFE adhesive can evaporate rapidly. As the solvent dissipates quickly, the viscosity of the adhesive increases significantly, thereby greatly enhancing the bonding effect between the adhesive and the glass cloth, significantly improving the wettability between the two, and effectively ensuring the tightness of their bond.

[0046] On the other hand, the evenly blowing hot air can disperse any residual air bubbles in the PTFE adhesive. Simultaneously, the hot air applies relatively uniform pressure to the PTFE adhesive, prompting it to better penetrate the glass cloth and into small gaps. This results in more thorough contact between the PTFE adhesive and the glass cloth, further improving their wettability and effectively solving many production problems caused by poor wettability.

[0047] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0048] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0049] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hot air device for improving the wettability of PTFE adhesive and fiberglass cloth, characterized in that: The system includes hot air assemblies distributed on both sides of the drying area. Each hot air assembly consists of hot air ducts arranged in upper and lower layers. Each hot air duct has several exhaust outlets on the side facing the drying area. Each row of exhaust outlets consists of several spaced, elongated rectangular openings. Adjacent rows of exhaust outlets are staggered. Each hot air duct is connected to the outlet of the air collection box through an air inlet pipe. The inlet of the air collection box is connected to the hot air blower.

2. The hot air device according to claim 1, characterized in that: A rotary adjustment mechanism is provided between the air inlet pipe and the hot air pipe, and the airflow from the air inlet pipe can flow into the hot air pipe.

3. The hot air device according to claim 2, characterized in that: The rotation adjustment mechanism includes a bearing, the end of the hot air pipe has a bearing cavity, the bearing is disposed in the bearing cavity, the air inlet pipe is inserted into the inner ring of the bearing and communicates with the hot air pipe; the end of the hot air pipe has a screw hole, the screw is threaded into the screw hole and can abut against the air inlet pipe.

4. The hot air device according to claim 3, characterized in that: A sealing ring is provided inside the bearing cavity. The sealing ring has an outwardly protruding lip that can abut against the inner ring of the bearing.

5. The hot air device according to claim 1, characterized in that: The air inlet pipe has a U-shaped structure.

6. The hot air device according to claim 2, characterized in that: The hot air device also includes a return air duct, which has a U-shaped structure, and its two ends are connected to the hot air ducts on both sides through a rotary adjustment mechanism.

7. The hot air device according to claim 1, characterized in that: The hot air assembly consists of three horizontally placed hot air pipes, each with three rows of parallel air outlets.

8. The hot air device according to claim 1, characterized in that: It also includes an adjustment plate for placing the hot air duct, the two ends of which are mounted on a fixed bracket via damping shafts.

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