A printed wiring board ink curing device

Abstract

The utility model discloses a kind of printed circuit board ink curing devices, including curing box, pass through the conveying device for conveying circuit board of opposite sides of the curing box, the curing box is divided into multiple heating zones, the printed circuit board ink curing device further include microwave heating device and electric heating device arranged in each heating zone, and be arranged at the circulating fan of the curing box outside and with each heating zone corresponding, the air inlet pipe and air outlet pipe of the circulating fan are connected with corresponding heating zone respectively.The printed circuit board ink curing device provided by the utility model, by the way of microwave heating and circulating hot air heating combination, improve heating efficiency, and can improve the temperature uniformity in curing box.

Description

Technical Field

[0001] This utility model relates to the technical field of printed circuit board processing equipment, specifically to a printed circuit board ink curing device. Background Technology

[0002] Solder resist ink for circuit boards is typically cured using high-temperature baking. In existing technologies, circuit board ink curing usually employs a hot air circulation heating method, where hot air is delivered into the ink curing chamber and circulated to bake and cure the solder resist ink. However, this method suffers from low heating efficiency because the circulating fan heats the entire space within the curing chamber; it also has high energy consumption, requiring equipment power exceeding 300KW; and due to the large space requiring heating, uneven temperature distribution within the curing chamber (with temperature differences of ±10℃) leads to uneven ink curing.

[0003] Therefore, the purpose of this utility model is to provide an ink curing device to solve the above-mentioned technical problems. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a printed circuit board ink curing device that improves heating efficiency and temperature uniformity in the curing chamber by combining microwave heating and circulating hot air heating.

[0005] The technical solution of this utility model is as follows: A printed circuit board ink curing device includes a curing chamber, a conveying device passing through opposite sides of the curing chamber and used for conveying the circuit board, the curing chamber being divided into multiple heating zones, the printed circuit board ink curing device further including a microwave heating device and an electric heating device disposed in each heating zone, and a circulating fan disposed outside the curing chamber and corresponding to each heating zone, the air inlet pipe and air outlet pipe of the circulating fan being respectively connected to the corresponding heating zone.

[0006] Furthermore, the length of each heating zone is 1000-1200mm.

[0007] Furthermore, the microwave heating device and the electric heating device are respectively located on the side wall of the curing chamber.

[0008] Furthermore, the microwave heating device and the electric heating device are located on the same inner wall of the curing chamber.

[0009] Furthermore, each curing chamber corresponding to a heating zone has an air inlet and an air outlet on its side wall. The air inlet is located on the same side as the microwave heating device and the electric heating device, and the air outlet is located on the side wall of the curing chamber opposite to the air inlet. The air inlet is connected to the air outlet pipe of the circulating fan, and the air outlet is connected to the air inlet pipe of the circulating fan.

[0010] Furthermore, the air inlet pipe of the circulating fan is equipped with a filter device.

[0011] Furthermore, the microwave heating device operates at a frequency of 2.45 GHz ± 50 MHz.

[0012] Furthermore, the electric heating device is a nickel-chromium alloy heating element with a rated power of 12-18KW.

[0013] Furthermore, the circulating fan is a high-temperature resistant circulating fan with a power of 1.2-1.8KW.

[0014] Compared with the prior art, the printed circuit board ink curing device provided by this utility model has the following advantages: I. The printed circuit board ink curing device provided by this utility model divides the space inside the curing chamber into multiple heating zones. Each heating zone is equipped with a microwave heating device, an electric heating device, and a circulating fan. The curing chamber is heated by a combination of microwave heating devices and electric heating devices, and the hot air inside the curing chamber is circulated by the circulating fan, thereby improving the heating efficiency and the ink curing efficiency.

[0015] II. The printed circuit board ink curing device provided by this utility model divides the curing chamber into multiple heating zones and heats each heating zone separately, which not only improves heating efficiency but also improves the temperature uniformity within the curing chamber, resulting in more uniform ink curing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the printed circuit board ink curing device of this utility model.

[0018] Figure 2 yes Figure 1 This is a schematic diagram of the printed circuit board ink curing device from another angle. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in the embodiments of this utility model, and to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be further described below in conjunction with the accompanying drawings.

[0020] It should be noted that the descriptions of these embodiments are for the purpose of aiding understanding of the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] Please refer to the following: Figure 1 and Figure 2 ,in Figure 1 This is a schematic diagram of the printed circuit board ink curing device of this utility model. Figure 2 yes Figure 1 The diagram shows another angle of the printed circuit board ink curing device. The printed circuit board ink curing device of this invention includes a curing chamber 1 and a conveying device 2 passing through opposite sides of the curing chamber for transporting the printed circuit board.

[0022] The curing chamber 1 includes a chamber body 11, within which a receiving space 12 is formed. The circuit board is conveyed by a conveying device 2, causing it to move from its inlet end to its outlet end within the receiving space of the chamber. In this invention, the receiving space within the chamber is divided into multiple heating zones 13, which are arranged consecutively. In this embodiment, the length of each heating zone is 1000-1200 mm. For example, when the length of the heating section for ink curing is 14 m, the corresponding chamber length is 14 m. When the length of the heating zone is 1000 m, there are 14 heating zones.

[0023] Each heating zone is equipped with a microwave heating device 3 and an electric heating device 4, and each heating zone has a corresponding independent circulating fan 5. The inlet and outlet pipes of the circulating fan 5 are connected to the corresponding heating zone's enclosure, and the microwave heating device 3 and electric heating device 4 are located inside the curing chamber. The heat generated by the microwave heating device 3 and electric heating device 4 is transported by the circulating fan, filling the heating zone with hot air to achieve the curing of the solder resist ink. Specifically, the side wall of the curing chamber corresponding to each heating zone has an air inlet 14 and an air outlet 15. The outlet pipe 51 of the circulating fan is connected to the air inlet 14, and the inlet pipe 52 of the circulating fan is connected to the air outlet 15, forming an airflow circulation loop.

[0024] In this embodiment, the microwave heating device 3 and the electric heating device 4 are respectively located on the side wall of the curing chamber 1. Preferably, they are located on the same inner wall of the curing chamber. When the circulating fan 5 is working, the airflow will transport the heat generated by both devices in the same direction, which can reduce heat loss.

[0025] Preferably, the air inlet 14 is located on the same side as the microwave heating device 3 and the electric heating device 4, and the air outlet 15 is located on the side wall of the curing chamber opposite to the air inlet 14. The airflow direction is horizontal and covers the entire surface of the circuit board, which is beneficial to improving the ink curing efficiency.

[0026] In this embodiment, the microwave heating device 3 operates at a frequency of 2.45GHz±50MHz, the electric heating device 4 is a nickel-chromium alloy heating element with a rated power of 12-18KW, and the circulating fan 5 is a high-temperature resistant circulating fan with a power of 1.2-1.8KW. A filter device 53 is installed on the air inlet pipe 52 of the circulating fan 5 to filter the circulating hot air, remove impurities, and prevent contamination of the circuit board.

[0027] The printed circuit board ink curing device of this utility model has the following technical advantages compared with the existing hot air circulation heating method: ; The printed circuit board ink curing device provided by this utility model divides the space inside the curing chamber into multiple heating zones. Each heating zone is equipped with a microwave heating device, an electric heating device, and a circulating fan. The curing chamber is heated by a combination of microwave heating devices and electric heating devices, and the hot air inside the curing chamber is circulated by the circulating fan, thereby improving heating efficiency and ink curing efficiency. Heating each heating zone individually improves the temperature uniformity inside the curing chamber, resulting in more uniform ink curing.

[0028] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A printed circuit board ink curing apparatus, comprising a curing chamber and a conveying device passing through opposite sides of the curing chamber for conveying the circuit board, characterized in that, The curing chamber is divided into multiple heating zones. The printed circuit board ink curing device also includes a microwave heating device and an electric heating device in each heating zone, as well as a circulating fan located outside the curing chamber and corresponding to each heating zone. The air inlet pipe and air outlet pipe of the circulating fan are respectively connected to the corresponding heating zone.

2. The printed circuit board ink curing apparatus according to claim 1, characterized in that, Each heating zone is 1000-1200mm long.

3. The printed circuit board ink curing apparatus according to claim 1, characterized in that, The microwave heating device and the electric heating device are respectively located on the side wall of the curing chamber.

4. The printed circuit board ink curing apparatus according to claim 3, characterized in that, The microwave heating device and the electric heating device are located on the same inner wall of the curing chamber.

5. The printed circuit board ink curing apparatus according to claim 4, characterized in that, Each curing chamber corresponding to a heating zone has an air inlet and an air outlet on its side wall. The air inlet is located on the same side as the microwave heating device and the electric heating device. The air outlet is located on the side wall of the curing chamber opposite to the air inlet. The air inlet is connected to the air outlet pipe of the circulating fan, and the air outlet is connected to the air inlet pipe of the circulating fan.

6. The printed circuit board ink curing apparatus according to any one of claims 1-5, characterized in that, The circulating fan is equipped with a filter device on its air inlet pipe.

7. The printed circuit board ink curing apparatus according to claim 1, characterized in that, The microwave heating device operates at a frequency of 2.45 GHz ± 50 MHz.

8. The printed circuit board ink curing apparatus according to claim 1, characterized in that, The electric heating device is a nickel-chromium alloy heating element with a rated power of 12-18KW.

9. The printed circuit board ink curing apparatus according to claim 1, characterized in that, The circulating fan is a high-temperature resistant circulating fan with a power of 1.2-1.8KW.

Images