A reflow soldering furnace

Abstract

The utility model provides a kind of reflow soldering furnace, including the conveyor belt being installed in the inside of the furnace body, the top of the conveyor belt is provided with two long strip square tubes, and the opposite side wall of two square tubes is equipped with several air holes, and the bottom of two square tubes is connected with sliding assembly by at least two support rods, and the open end of at least one square tube is provided with connecting piece, the connecting piece includes the fixed plate being detachably connected with the square tube, and the fixed plate is communicated with the flange joint for accessing cold air;The utility model relates to the technical field of reflow soldering furnace, through two parallelly arranged square tubes, the guiding and limiting effect of metallized ceramic substrate is played, to prevent it from running off when transporting in the furnace, cold air is introduced from the flange joint of one end of square tube, and is discharged from air hole in concentration;So that the metallized ceramic substrate that has completed welding can be subjected to linear airflow cooling parallel to its edge, with wide coverage, efficient and uniform basic cooling.

Description

Technical Field

[0001] This utility model relates to the field of reflow oven technology, and in particular to a reflow oven. Background Technology

[0002] Reflow ovens are key equipment in the production of semiconductor thermoelectric cooling devices. They are used to permanently fix surface mount components onto metallized ceramic substrates by heating and melting solder paste. A typical reflow oven includes an oven body, a conveyor belt, a heating zone, and a cooling zone.

[0003] Currently, after the reflow soldering process, the metallized ceramic substrate needs to enter the cooling zone for curing. Traditional cooling methods often use fixed air ducts or nozzles in the cooling zone for blowing cooling. Fixed air ducts cannot accurately cool different components on the metallized ceramic substrate (such as BGA, large chips, and other areas that generate a lot of heat). For some "dead corners" on the board that are difficult for airflow to reach, the cooling effect is poor. Utility Model Content

[0004] The purpose of this invention is to provide a reflow oven that improves the cooling effect on components on metallized ceramic substrates.

[0005] This utility model provides a reflow oven, including an oven body and a conveyor belt installed inside the oven body. Two long square tubes are arranged in parallel above the conveyor belt. Each of the two square tubes has several air outlets on its opposite sidewalls, and the air outlets are located near the closed end of the square tube.

[0006] The bottom of each of the two square tubes is connected to a sliding assembly by at least two support rods, and the sliding assembly slides in cooperation with a slide rail fixed on the furnace body.

[0007] At least one of the square tubes has a connector at its open end, the connector including a fixing plate detachably connected to the square tube, the fixing plate having a flange joint for connecting to cold air.

[0008] The furnace body is also equipped with a driving component, the output end of which is connected to one of the square tubes. The driving component is used to drive the square tube to move along the slide rail to adjust the distance between the two square tubes.

[0009] Preferably, at least one of the square tubes has multiple mounting interfaces at its top, and each mounting interface is connected to a metal air duct that can be bent and shaped at will via a threaded connector.

[0010] Preferably, the metal air guide tube is a metal serpentine tube.

[0011] Preferably, the sliding assembly includes a slide block, the top end of which is fixedly connected to the bottom end of the support rod, and the bottom end of which is slidably connected to the slide rail. The slide block is also provided with locking bolts for locking it to the slide rail.

[0012] Preferably, the driving component includes a telescopic cylinder and a connecting plate. The cylinder body of the telescopic cylinder is fixedly connected to the furnace body, the output end of the telescopic cylinder is connected to the connecting plate, and the bottom of the connecting plate is fixedly connected to the outer wall of the square tube.

[0013] Preferably, the driving component further includes at least one guide rod, which is arranged parallel to the telescopic cylinder, with one end fixed to the connecting plate and the other end sliding through the side wall of the furnace body.

[0014] Preferably, the telescopic cylinder is a pneumatic cylinder, a hydraulic cylinder, or an electric push rod.

[0015] Preferably, there is a gap between the support rod and the two sides of the conveyor belt.

[0016] This utility model provides a reflow oven:

[0017] Two parallel square tubes guide and limit the metallized ceramic substrate, preventing it from deviating during transport in the furnace. Cold air enters from the flange joint at one end of the square tube and is discharged from the air outlet near the end of the opposite side wall. This allows the welded metallized ceramic substrate to be cooled by a linear airflow parallel to its edge and with a wide coverage area the moment it enters the cooling zone, achieving efficient and uniform basic cooling.

[0018] The addition of a flexible metal air duct at the top of the square tube allows operators to flexibly bend each air duct according to the specific distribution of high-heat components (such as CPU, GPU, etc.) on different metallized ceramic substrates, precisely aligning its air outlet with these "heat sources" or "dead corners" that are difficult for airflow to reach, thereby achieving targeted and enhanced heat dissipation. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2This is a schematic diagram of the structure of the square tube, connector, locking bolt and metal air guide tube of this utility model;

[0022] Figure 3 This is a schematic diagram of the closed state of the furnace body in this utility model;

[0023] Figure 4 This is an assembly drawing of the drive component and the square tube in this utility model;

[0024] Figure 5 for Figure 2 Assembly drawing of the middle slide block, slide rail, locking bolts and support rod;

[0025] Figure 6 for Figure 2 A schematic diagram of the structure of the metal gas guide tube and the square tube.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Furnace body, 2-Conveyor belt, 3-Square tube, 4-Gas outlet, 5-Support rod, 6-Connector, 61-Fixing plate, 62-Flange joint, 7-Drive component, 71-Telescopic cylinder, 72-Connecting plate, 73-Guide rod, 81-Slide seat, 82-Slide rail, 83-Locking bolt, 9-Metal gas guide pipe, 91-Threaded joint. Detailed Implementation

[0028] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model.

[0030] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this embodiment, as Figure 1 and Figure 2 As shown, a reflow oven includes an oven body 1 and a conveyor belt 2 installed inside the oven body 1. Two long square tubes 3 are arranged in parallel above the conveyor belt 2. Several air outlets 4 are provided on the opposing side walls of the two square tubes 3, and the air outlets 4 are located near the closed end of the square tubes 3.

[0032] The bottom of each of the two square tubes 3 is connected to a sliding assembly by at least two support rods 5, and the sliding assembly slides in cooperation with the slide rail 82 fixed on the furnace body 1.

[0033] At least one open end of the square tube 3 is provided with a connector 6, the connector 6 including a fixing plate 61 detachably connected to the square tube 3, and a flange joint 62 for connecting to cold air is connected to the fixing plate 61.

[0034] The furnace body 1 is also equipped with a drive unit 7. The output end of the drive unit 7 is connected to one of the square tubes 3. The drive unit 7 is used to drive the square tube 3 to move along the slide rail 82 to adjust the distance between the two square tubes 3.

[0035] Thus, through the cooperation of the drive component 7 and the sliding component, the distance between the two square tubes 3 can be flexibly adjusted to adapt to metallized ceramic substrates of different widths, which has a good guiding and limiting effect; at the same time, the square tube 3 also serves as a cooling air duct, and cold air can be introduced from the flange joint 62 and discharged from the air outlet 4 to provide basic linear cooling for the workpiece that has just entered the cooling zone.

[0036] Specifically, the square tube 3 is preferably made of aluminum alloy with good thermal conductivity, and its cross-section is a rectangular hollow structure; the air outlets 4 are densely arranged in the square tube 3 within about one-third of its length near its closed end, so that the cooling airflow can concentrate on covering the high-temperature workpiece that has just come out of the heating zone.

[0037] In some embodiments, such as Figure 2 As shown, at least one square tube 3 has multiple mounting interfaces on its top, and each mounting interface is connected to a metal air duct 9 that can be bent and shaped at will via a threaded connector 91.

[0038] Specifically, the installation interface can be an internal threaded hole machined on the top of the square tube 3; the threaded connector 91 is a pagoda connector or a quick-connect connector to achieve quick installation and sealing connection of the metal air guide tube 9.

[0039] In some embodiments, the metal air guide tube 9 is a metal serpentine tube;

[0040] Specifically, the metal serpentine tube is made of highly malleable aluminum, copper or their alloys, and the tube wall is usually wrapped with a layer of heat-resistant plastic or rubber.

[0041] Metal serpentine tubes can be easily bent at any angle by hand, and after bending, they can maintain their shape due to their own structural rigidity, without springing back or deforming due to airflow or slight vibration.

[0042] In some embodiments, such as Figure 6 As shown, the sliding assembly includes a slide block 81, the top of which is fixedly connected to the bottom of the support rod 5, and its bottom is slidably connected to the slide rail 82. The slide block 81 is also provided with a locking bolt 83 for locking it to the slide rail 82.

[0043] Specifically, the cross-section of the slide rail 82 is preferably "T"-shaped or "convex"-shaped, and the slide block 81 has a matching groove inside. When the locking bolt 83 is tightened, its end will tightly abut against the slide rail 82, generating friction, thereby firmly fixing the entire square tube 3 structure in the preset position.

[0044] In some embodiments, such as Figure 4 As shown, the driving component 7 includes a telescopic cylinder 71 and a connecting plate 72. The cylinder body of the telescopic cylinder 71 is fixedly connected to the furnace body 1, the output end of the telescopic cylinder 71 is connected to the connecting plate 72, and the bottom of the connecting plate 72 is fixedly connected to the outer wall of the square tube 3.

[0045] Specifically, the telescopic cylinder 71 can be a pneumatic cylinder, which is preferred in this embodiment due to its fast action and low cost. The telescopic cylinder 71 is fixed to the furnace body 1 by an external bracket, and the linear motion of its output end is converted into the linear movement of the square tube 3 by the connecting plate 72.

[0046] In some embodiments, such as Figure 4 As shown, the drive unit 7 also includes at least one guide rod 73, which is arranged parallel to the telescopic cylinder 71. One end of the guide rod 73 is fixed to the connecting plate 72, and the other end slides through the side wall of the furnace body 1.

[0047] Specifically, the guide rod 73 is usually equipped with a linear bearing to ensure smooth and precise movement. Its core function is to ensure the stability of the telescopic cylinder 71 in pushing the square tube 3, and to prevent jamming or deflection caused by lateral forces;

[0048] It should be noted that the number of guide rods 73 can be one or more, symmetrically arranged on both sides of the telescopic cylinder 71 to provide optimal guiding stability.

[0049] In some embodiments, the telescopic cylinder 71 is a pneumatic cylinder, a hydraulic cylinder, or an electric push rod;

[0050] Specifically, those skilled in the art can flexibly select different types of telescopic cylinders 71 according to specific requirements for thrust, speed, control accuracy and cost.

[0051] In some embodiments, such as Figure 1 As shown, there is a gap between the support rod 5 and the two sides of the conveyor belt 2;

[0052] Specifically, the gap between the support rod 5 and the conveyor belt 2 is designed so that the support rod 5 and the square tube 3 structure will not interfere with the normal operation of the conveyor belt 2 when they are adjusted to any position or during equipment operation.

[0053] The working principle of this application is illustrated below with a preferred embodiment:

[0054] Adjust the distance between the two square tubes 3 according to the size of the metallized ceramic substrate to be welded; move the slide block 81 on the slide rail 82, and the slide block 81 drives the two square tubes 3 to move towards each other through the support rod 5, so that the gap between the two square tubes 3 matches the metallized ceramic substrate. Then use the locking bolt 83 to fix the position of the slide block 81 on the slide rail 82. Alternatively, the locking bolt 83 on one side can be loosened to activate the telescopic component 71. The output end of the telescopic component 71 drives the square tube 3 on one side to move closer to the square tube 3 on the other side through the connecting plate 72 to constrain the movement direction of the metallized ceramic substrate.

[0055] Close the top cover of furnace body 1, start furnace body 1 and place the metallized ceramic substrate on conveyor belt 2. Conveyor belt 2 carries the metallized ceramic substrate into the interior of furnace body 1 for reflow soldering. During this process, two square tubes 3 constrain the direction of travel of the metallized ceramic substrate.

[0056] When the metallized ceramic substrate is welded and moved to the cooling end of the furnace body 1, the external cold air pipe and flange joint 62 are connected. The cold air enters the square tube 3 through the flange joint 62 and flows along the square tube 3 to the air outlet 4 and the metal air guide pipe 9. Since the air outlet 4 and the metal air guide pipe 9 are close to the metallized ceramic substrate, (each metal air guide pipe 9 is manually bent so that its air outlet is precisely and closely aligned with these specific components) the airflow dead corners on the metallized ceramic substrate are precisely cooled by air delivery.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A reflow oven, comprising an oven body (1) and a conveyor belt (2) installed inside the oven body (1), characterized in that: Two long strip-shaped square tubes (3) are arranged parallel above the conveyor belt (2). Several air outlets (4) are provided on the opposing sidewalls of the two square tubes (3), and the air outlets (4) are located near the closed end of the square tubes (3). The bottom of each of the two square tubes (3) is connected to a sliding assembly by at least two support rods (5), and the sliding assembly is slidably engaged with a slide rail (82) fixed on the furnace body (1); At least one of the square tubes (3) is provided with a connector (6) at its open end. The connector (6) includes a fixing plate (61) detachably connected to the square tube (3). A flange joint (62) for connecting to cold air is connected to the fixing plate (61). The furnace body (1) is also provided with a drive unit (7), the output end of the drive unit (7) is connected to one of the square tubes (3), and the drive unit (7) is used to drive the square tube (3) to move along the slide rail (82) to adjust the distance between the two square tubes (3).

2. The reflow oven according to claim 1, characterized in that, At least one of the square tubes (3) has multiple mounting interfaces on its top, and each mounting interface is connected to a metal air duct (9) that can be bent and shaped at will via a threaded connector (91).

3. The reflow oven according to claim 2, characterized in that, The metal air guide tube (9) is a metal serpentine tube.

4. The reflow oven according to claim 1, characterized in that, The sliding assembly includes a slide block (81), the top end of which is fixedly connected to the bottom end of the support rod (5), and its bottom end is slidably connected to the slide rail (82). The slide block (81) is also provided with a locking bolt (83) for locking it to the slide rail (82).

5. The reflow oven according to claim 1, characterized in that, The driving component (7) includes a telescopic cylinder (71) and a connecting plate (72). The cylinder body of the telescopic cylinder (71) is fixedly connected to the furnace body (1). The output end of the telescopic cylinder (71) is connected to the connecting plate (72). The bottom of the connecting plate (72) is fixedly connected to the outer wall of the square tube (3).

6. The reflow oven according to claim 5, characterized in that, The drive unit (7) also includes at least one guide rod (73), which is arranged parallel to the telescopic cylinder (71), with one end fixed to the connecting plate (72) and the other end sliding through the side wall of the furnace body (1).

7. The reflow oven according to claim 6, characterized in that, The telescopic cylinder (71) is a pneumatic cylinder, a hydraulic cylinder, or an electric push rod.

8. The reflow oven according to claim 2, characterized in that, There is a gap between the support rod (5) and the two sides of the conveyor belt (2).

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