A finished product PCB oven
By using an inclined rotating tray and a rotary drive device in the finished PCB oven, combined with air supply and exhaust mechanisms, the problem of uneven curing of PCB ink was solved, achieving uniform curing of ink and improving the yield of finished PCBs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LONGTENG ELECTRONICS TECH CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-16
AI Technical Summary
In existing finished PCB ovens, insufficient contact between the PCB and hot air leads to uneven ink curing, reducing the yield of finished PCBs.
Design a finished PCB oven that uses an inclined rotating tray and a rotary drive device to make the PCB rotate around the axis under the action of the hot air circulation device, increasing the contact area between the hot air and the PCB, and forming a right-to-left hot air flow through the air supply and exhaust mechanism to ensure uniform curing of ink.
By enhancing the contact between hot air and the PCB, uniform curing of the ink was achieved, improving the yield of finished PCBs and avoiding uneven curing.
Smart Images
Figure CN224368073U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PCB processing technology, and in particular to a finished PCB oven. Background Technology
[0002] A finished PCB oven is a baking device specifically designed for finished printed circuit boards. Its main purpose is to cure solder resist ink during the PCB production process, addressing the need for secondary solder resist printing due to quality issues such as thin solder resist or surface scratches. A finished PCB oven typically includes a heating element and a hot air circulation system. The heating element raises the oven temperature, while the hot air circulation system circulates hot air within the oven to dry and cure the ink on the PCB. In existing technologies, the PCB cannot fully contact the hot air, leading to uneven ink curing and consequently, surface defects, thus reducing the yield of finished PCBs. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a finished PCB oven that allows the PCB to fully contact with hot air, thus improving the yield rate of finished PCBs.
[0004] The finished PCB oven according to an embodiment of the present invention includes a housing, a heating device, a hot air circulation device, a rotating shaft, and a rotation drive device.
[0005] A door is rotatably connected to the enclosure, used to seal or open the enclosure opening; a heating device is located on the enclosure, used to raise the temperature of the gas inside the enclosure; a hot air circulation device is located on the enclosure, used to circulate hot air in the enclosure in the left-right direction; a rotating shaft is parallel to the up-down direction and rotatably connected to the enclosure, with multiple trays evenly distributed along the up-down direction on the rotating shaft, all of which are inclined and used for placing PCBs; a rotation drive device is located on the enclosure, used to drive the rotating shaft to rotate.
[0006] It has at least the following beneficial effects:
[0007] When the ink on a PCB needs to be dried and cured, the worker can rotate the chamber door and open the chamber opening. The worker can then place the PCBs to be dried onto multiple trays on the rotating shaft. After placing the PCBs, the worker rotates the chamber door and seals the opening. The worker can then activate the heating device, hot air circulation device, and rotary drive device. Once the heating device is activated, it heats the gas inside the chamber, raising its temperature. The hot air circulation device circulates the gas in the chamber, creating hot air that acts on the PCBs on the trays. The rotary drive device rotates the rotating shaft and the trays on it, causing the PCBs on the trays to rotate around the axis of the shaft within the chamber. As the trays rotate the PCBs, their position continuously changes, allowing hot air to reach the PCB surface from different directions. This ensures that the ink on the PCBs makes uniform and sufficient contact with the hot air, guaranteeing uniform ink curing and improving the yield of finished PCBs. On the other hand, since multiple trays are tilted, the PCBs on them are placed at an angle. Because the hot air flows laterally, the tilted PCBs have a larger contact area with the hot air, allowing for more thorough contact between the hot air and the ink on the PCBs. This ensures uniform curing of the ink, thus improving the yield rate of finished PCBs. The tilted and rotating trays used to hold the PCBs in the finished PCB oven ensure that the ink on the PCBs on the trays has sufficient and uniform contact with the hot air, preventing uneven curing and further improving the yield rate of finished PCBs.
[0008] According to the finished PCB oven of this utility model embodiment, multiple trays are all perforated plates.
[0009] According to an embodiment of the present utility model, the finished PCB oven includes a hot air circulation device comprising an air supply mechanism and an air extraction mechanism. Both the air supply mechanism and the air extraction mechanism are disposed on the oven body. The air extraction mechanism and the air supply mechanism are respectively disposed on the left and right sides of the plurality of trays. The air supply mechanism is used to blow gas from outside the oven body into the oven body, and the air extraction mechanism is used to draw gas from inside the oven body to the outside of the oven body, so that hot air flowing from right to left is formed inside the oven body.
[0010] According to an embodiment of the present utility model, the finished PCB oven includes a first housing and a blower. The first housing is disposed inside the oven and is located on the right side of the plurality of trays. The first housing has a plurality of air outlets on its side facing the plurality of trays. The blower is disposed on the oven and its output end is connected to the first housing. The blower is used to send gas from outside the oven into the first housing so that the gas inside the first housing passes through the plurality of air outlets and blows onto the plurality of trays.
[0011] According to an embodiment of the present utility model, the finished PCB oven includes a second housing and an exhaust fan. The second housing is disposed inside the oven and is located on the left side of the plurality of trays. The second housing has a plurality of exhaust ports on its side facing the plurality of trays. The exhaust fan is disposed on the oven and its suction end is connected to the second housing. The exhaust fan is used to draw the gas inside the second housing to the outside of the oven, so that the gas inside the oven passes through the plurality of exhaust ports and flows into the second housing.
[0012] According to an embodiment of the present invention, the finished PCB oven includes a heating device comprising multiple resistance wire heating mechanisms, all of which are disposed within the oven body and are used to heat the gas within the oven body.
[0013] According to the finished PCB oven of this utility model embodiment, the angle between the surface of the tray and the horizontal plane is an inclination angle, and the inclination angle is 5° to 15°.
[0014] According to an embodiment of the present utility model, the finished PCB oven includes a rotary drive device comprising a motor and a coupling. The motor is mounted on the housing, and the output end of the motor is connected to the upper end of the rotating shaft via the coupling. The motor is used to drive the rotating shaft to rotate around its own axis.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0017] Figure 1 This is a structural diagram of a finished PCB oven;
[0018] Figure 2 It is a side view of the rotary drive unit, the shaft, and multiple trays;
[0019] Figure 3This is a schematic diagram of the internal structure of a finished PCB oven;
[0020] Figure 4 This is a schematic diagram of the internal structure of a finished PCB oven from another perspective;
[0021] Icon labels:
[0022] Box body 100; Box door 110;
[0023] 200 shaft; 210 pallet;
[0024] Heating device 300; resistance wire heating mechanism 310;
[0025] Rotary drive unit 400; motor 410; coupling 420;
[0026] Hot air circulation device 500; air supply mechanism 510; first housing 511; air outlet 512; blower 513; exhaust mechanism 520; second housing 521; exhaust port 522; exhaust fan 523. Detailed Implementation
[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.
[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0030] refer to Figure 1 and Figure 2 This utility model discloses a finished PCB oven, including a box body 100, a heating device 300, a hot air circulation device 500, a rotating shaft 200 and a rotation drive device 400.
[0031] A door 110 is rotatably connected to the enclosure 100, and the door 110 is used to seal or open the opening of the enclosure 100; a heating device 300 is provided on the enclosure 100, and the heating device 300 is used to raise the temperature of the gas inside the enclosure 100; a hot air circulation device 500 is provided on the enclosure 100, and the hot air circulation device 500 is used to make hot air flow in the left and right direction inside the enclosure 100; a rotating shaft 200 is parallel to the up and down direction and is rotatably connected inside the enclosure 100. Multiple trays 210 are evenly distributed on the rotating shaft 200 in the up and down direction. The multiple trays 210 are all inclined and are used for placing PCBs; a rotation drive device 400 is provided on the enclosure 100 and is used to drive the rotating shaft 200 to rotate.
[0032] In this embodiment of the invention, multiple trays 210 are perforated plates. The finished PCB oven also includes multiple positioning fixtures (not shown in the figure), each equipped with an insertion rod that can be inserted into the perforations on the tray 210, allowing the positioning fixture to be stably positioned on the tray 210. The positioning fixture is used to place the PCB, positioning and fixing it so that the PCB can be stably placed on the tray 210, preventing it from falling off the tray 210 during rotation. Specifically, the tray rotates slowly, and the positioning fixture has positioning grooves for placing the PCB, preventing it from coming out of the grooves during tray rotation. It should be noted that PCB (Printed Circuit Board) is a printed circuit board. It should also be noted that the angle between the surface of the tray 210 and the horizontal plane is the tilt angle of the tray 210. In this embodiment of the invention, the tilt angle of the tray 210 is 5° to 15°. As a preferred embodiment of the invention, the tilt angle is 10°. A horizontal plane refers to a plane perpendicular to the vertical direction.
[0033] Understandably, when the ink on the PCB needs to be dried and cured, the worker can rotate the chamber door 110 and open the chamber 100. The worker can then place the PCB to be dried onto multiple trays 210 on the rotating shaft 200. After placing the PCB, the worker rotates the chamber door 110 and seals the opening of the chamber 100. The worker can then turn on the heating device 300, the hot air circulation device 500, and the rotary drive device 400. Once the heating device 300 is activated, it heats the gas inside the chamber 100, raising its temperature. Once the hot air circulation device 500 is activated, it causes the gas inside the chamber 100 to flow in a left-right direction, creating hot air that acts on the PCBs on the multiple trays 210. After the rotary drive device 400 is started, it drives the rotating shaft 200 and multiple trays 210 on the shaft 200 to rotate, allowing the PCBs on the trays 210 to rotate around the axis of the shaft 200 within the housing 100. During the rotation of the PCBs by the trays 210, the position of the PCBs continuously changes, allowing hot air to be blown onto the PCB surface from different directions. This ensures that the ink on the PCBs can come into uniform and sufficient contact with the hot air, guaranteeing uniform curing of the ink and thus improving the yield of finished PCBs. Furthermore, since the multiple trays 210 are tilted, the PCBs on them are placed at an angle. Because the hot air flows in a left-right direction, the tilted PCBs have a larger contact area with the hot air, allowing the hot air to come into more sufficient contact with the ink on the PCBs, ensuring uniform curing of the ink and further improving the yield of finished PCBs. The tray 210 used to support the PCB in the finished PCB oven is tilted and can rotate, so that the ink on the PCB on the tray 210 can fully and evenly contact the hot air, avoiding uneven curing of the ink on the PCB, thus helping to improve the yield of finished PCB.
[0034] refer to Figure 3 and Figure 4 Multiple trays 210 are perforated plates. Understandably, the perforations in these plates allow for hot air flow, enhancing the circulation of hot air within the housing 100 and ensuring temperature uniformity, which is beneficial for improving ink drying and curing. Furthermore, the perforated plates have low heat storage and uniform heat conduction, reducing ink curing defects caused by abnormal temperatures at the contact points between the trays 210 and the PCB (such as localized overheating or uneven heat dissipation). This allows for rapid and uniform ink curing, thus improving the yield rate of the finished PCB.
[0035] refer to Figure 1 , Figure 3 and Figure 4The hot air circulation device 500 includes an air supply mechanism 510 and an exhaust fan 523 structure 520. Both the air supply mechanism 510 and the exhaust fan 523 structure 520 are mounted on the housing 100. The exhaust fan 523 structure 520 and the air supply mechanism 510 are respectively mounted on the left and right sides of the multiple trays 210. The air supply mechanism 510 is used to blow the air outside the housing 100 into the housing 100, and the exhaust fan 523 structure 520 is used to draw the air inside the housing 100 to the outside of the housing 100, so that hot air flowing from right to left is formed inside the housing 100. Understandably, when the air supply mechanism 510 and the exhaust fan 523 mechanism 520 are started simultaneously, since the exhaust fan 523 mechanism 520 and the air supply mechanism 510 are respectively located on the left and right sides of the multiple trays 210, the air supply mechanism 510 can blow the gas outside the box 100 from right to left into the box 100, and the exhaust fan 523 mechanism 520 can draw the gas on the left side of the multiple trays 210 to the outside of the box 100, so that the gas heated by the heating device 300 inside the box 100 can flow and form hot air flowing from right to left. On the other hand, under the combined action of the exhaust fan 523 mechanism 520 and the air supply mechanism 510, the gas carrying a large amount of water vapor and volatile substances inside the chamber 100 can be quickly discharged from the chamber 100, and the gas outside the chamber 100 can be quickly entered into the chamber 100, which accelerates the gas turnover frequency inside the chamber 100, allowing the ink on the PCB to cure quickly, which is beneficial to improving the baking efficiency of the finished PCB oven for the ink on the PCB.
[0036] refer to Figure 1 and Figure 3 The air supply mechanism 510 includes a first housing 511 and a blower 513. The first housing 511 is located inside the housing 100 and is situated on the right side of the multiple trays 210. Multiple air outlets 512 are provided on the side of the first housing 511 facing the multiple trays 210. The blower 513 is located on the housing 100, and its output end is connected to the first housing 511. The blower 513 is used to draw gas from outside the housing 100 into the first housing 511, so that the gas inside the first housing 511 passes through the multiple air outlets 512 and is blown towards the multiple trays 210. It can be understood that the blower 513, located outside the housing 100, draws in gas from outside the housing 100 and draws it into the first housing 511. Then, the gas inside the first housing 511 passes through the multiple air outlets 512 on the first housing 511 and is blown from right to left towards the multiple trays 210.
[0037] refer to Figure 1 and Figure 4The exhaust fan 523 structure 520 includes a second housing 521 and an exhaust fan 523. The second housing 521 is located inside the box 100 and is situated on the left side of the multiple trays 210. The second housing 521 has multiple exhaust ports 522 on its side facing the multiple trays 210. The exhaust fan 523 is mounted on the box 100, and the suction end of the exhaust fan 523 is connected to the second housing 521. The exhaust fan 523 is used to draw the gas inside the second housing 521 to the outside of the box 100, so that the gas inside the box 100 passes through the multiple exhaust ports 522 and flows into the second housing 521. It is understood that the exhaust fan 523 is located outside the housing 100. After the exhaust fan 523 is started, a negative pressure is formed inside the second housing 521, causing the gas inside the second housing 521 to be exhausted to the outside of the housing 100 through the exhaust fan 523. Meanwhile, the gas inside the housing 100 is drawn into the second housing 521 through multiple exhaust ports 522 on the second housing 521, thus allowing the gas inside the housing 100 to be drawn to the outside of the housing 100 by the exhaust fan 523. Under the action of the supply fan and the exhaust fan 523, hot air flowing from right to left can be formed inside the housing 100. In this embodiment of the utility model, both the exhaust fan 523 and the supply fan are common fans, which will not be described further here.
[0038] refer to Figure 3 and Figure 4 The heating device 300 includes multiple resistance wire heating mechanisms 310, all of which are disposed within the housing 100 and are used to heat the gas within the housing 100. It is understood that, since the multiple resistance wire heating mechanisms 310 are all located within the housing 100, their temperatures can rise rapidly after activation, allowing their heat to be transferred to the gas within the housing 100, thereby rapidly increasing the temperature of the gas within the housing 100. In this embodiment of the invention, the multiple resistance wire heating mechanisms 310 are all located above the multiple trays 210. The resistance wire heating mechanism 310 is a common heating mechanism and will not be described further here.
[0039] refer to Figure 2The rotary drive device 400 includes a motor 410 and a coupling 420. The motor 410 is mounted on the housing 100, and its output end is connected to the upper end of the rotating shaft 200 via the coupling 420. The motor 410 drives the rotating shaft 200 to rotate around its own axis. It can be understood that the motor 410 is located outside the housing 100, the upper end of the rotating shaft 200 is rotatably connected to the upper inner wall of the housing 100, and the lower end of the rotating shaft 200 is rotatably connected to the lower inner wall of the housing 100. The output end of the motor 410 is connected to the upper end of the rotating shaft 200 via the coupling 420, enabling the motor 410 to drive the rotating shaft 200 to rotate around its own axis via the coupling 420. Both the motor 410 and the coupling 420 are common components and will not be described further here.
[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0041] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A finished PCB oven, characterized in that, include: A box body (100) is rotatably connected to a box door (110), the box door (110) being used to seal or open the opening of the box body (100); A heating device (300) is provided on the box (100), and the heating device (300) is used to raise the temperature of the gas inside the box (100); A hot air circulation device (500) is provided on the housing (100), and the hot air circulation device (500) is used to make hot air flow in the housing (100) in the left and right directions; A rotating shaft (200) is parallel to the vertical direction. The rotating shaft (200) is rotatably connected inside the housing (100). Multiple trays (210) are evenly distributed on the rotating shaft (200) along the vertical direction. The multiple trays (210) are all inclined and are used for placing PCBs. A rotary drive device (400) is provided on the housing (100) and is used to drive the rotating shaft (200) to rotate.
2. The finished PCB oven according to claim 1, characterized in that: All of the trays (210) are perforated plates.
3. The finished PCB oven according to claim 1, characterized in that: The hot air circulation device (500) includes an air supply mechanism (510) and an exhaust fan (523) structure (520). The air supply mechanism (510) and the exhaust fan (523) structure (520) are both located on the housing (100). The exhaust fan (523) structure (520) and the air supply mechanism (510) are respectively located on the left and right sides of the plurality of trays (210). The air supply mechanism (510) is used to blow the gas outside the housing (100) into the housing (100). The exhaust fan (523) structure (520) is used to draw the gas inside the housing (100) to the outside of the housing (100), so that hot air flowing from right to left is formed inside the housing (100).
4. The finished PCB oven according to claim 3, characterized in that: The air supply mechanism (510) includes a first housing (511) and a blower (513). The first housing (511) is located inside the box (100) and is situated on the right side of the plurality of trays (210). The first housing (511) has a plurality of air outlets (512) on its side facing the plurality of trays (210). The blower (513) is located on the box (100) and its output end is connected to the first housing (511). The blower (513) is used to send gas from outside the box (100) into the first housing (511) so that the gas inside the first housing (511) passes through the plurality of air outlets (512) and blows onto the plurality of trays (210).
5. The finished PCB oven according to claim 3, characterized in that: The exhaust fan (523) structure (520) includes a second housing (521) and an exhaust fan (523). The second housing (521) is located inside the box (100) and is situated on the left side of the plurality of trays (210). The second housing (521) has a plurality of exhaust ports (522) on its side facing the plurality of trays (210). The exhaust fan (523) is mounted on the box (100). The suction end of the exhaust fan (523) is connected to the second housing (521). The exhaust fan (523) is used to draw the gas inside the second housing (521) to the outside of the box (100) so that the gas inside the box (100) passes through the plurality of exhaust ports (522) and flows into the second housing (521).
6. The finished PCB oven according to claim 1, characterized in that: The heating device (300) includes multiple resistance wire heating mechanisms (310), all of which are located inside the housing (100) and are used to heat the gas inside the housing (100).
7. The finished PCB oven according to claim 1, characterized in that: The angle between the surface of the tray (210) and the horizontal plane is an inclination angle, which is 5° to 15°.
8. The finished PCB oven according to claim 1, characterized in that: The rotary drive device (400) includes a motor (410) and a coupling (420). The motor (410) is mounted on the housing (100). The output end of the motor (410) is connected to the upper end of the rotating shaft (200) through the coupling (420). The motor (410) is used to drive the rotating shaft (200) to rotate around its own axis.