High-cleanliness high-temperature-resistant mesh belt assembly

Abstract

The utility model discloses a high-cleanliness high-temperature-resistant mesh belt assembly which comprises mounting plates and a cleaning mechanism, stainless steel mesh belts are arranged at the upper ends of the mounting plates, and stainless steel supporting strips are arranged between every two longitudinally adjacent mounting plates. The cleaning mechanism comprises dirt suction cavities, guide grooves, dirt suction holes and connecting assemblies, the dirt suction cavities are formed in the left side and the right side in the stainless steel supporting strip correspondingly, the guide grooves are formed in the upper end in the stainless steel supporting strip, and the dirt suction holes are formed in the lower ends of the left side wall and the right side wall of the guide grooves correspondingly. According to the high-cleanliness high-temperature-resistant mesh belt assembly, the cleaning mechanism is arranged, the contact area between the stainless steel supporting strips and the stainless steel mesh belt is reduced by forming the guide groove, friction is relieved through cooperation with a Teflon adhesive tape, and meanwhile dust and chippings generated by friction can be rapidly guided to the bottom of the guide groove; and then dust and chippings generated by friction are quickly cleaned out of the equipment according to the pressure difference principle, and the situation of shutdown cleaning is avoided.

Description

Technical Field

[0001] This utility model relates to the field of reflow soldering equipment technology, specifically a high-cleanliness, high-temperature resistant mesh belt assembly. Background Technology

[0002] A reflow oven, also called a reflow soldering machine or "reflow furnace," is a device that provides a heating environment to melt solder paste, allowing surface-mount components and PCB pads to reliably bond together through the solder paste alloy. The reflow oven's structure mainly consists of three parts: a heating system, a conveying system, and a cooling system. The heating system uses independent temperature control in the upper and lower temperature zones, along with a rectifier board, to achieve uniform hot air circulation. The conveying system includes a stainless steel mesh belt and guide rails to ensure smooth transport of the PCB board. The cooling system rapidly solidifies the solder joints to ensure soldering quality. Because the stainless steel mesh belt is flexible, it can bend downwards due to gravity. Therefore, stainless steel support bars are often installed below the stainless steel mesh belt, ensuring the lower end of the mesh belt fits against the upper part of the support bars to support the mesh belt and prevent it from bending downwards.

[0003] Traditional reflow ovens use a conveyor belt assembly that maintains the smooth operation of the stainless steel conveyor belt by having the upper end of a stainless steel support bar contact the lower end of the belt. This provides support for the conveyor belt. The equipment contains high-temperature zones, and the continuous operation of the conveyor belt causes constant friction between it and the support bars. This high temperature further exacerbates the wear and tear on both the conveyor belt and the support bars, generating considerable dust and debris. Regular shutdowns for cleaning are necessary to prevent this dust and debris from falling onto the PCB board surface and affecting the soldering results. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-cleanliness, high-temperature resistant mesh belt assembly, including a mounting plate and a cleaning mechanism;

[0005] The upper end of the mounting plate is provided with a stainless steel mesh belt, and stainless steel support strips are provided between two longitudinally adjacent mounting plates.

[0006] The cleaning mechanism includes a suction chamber, a guide groove, suction holes, and connecting components. The suction chamber is located on the left and right sides inside the stainless steel support strip. The guide groove is located at the upper end inside the stainless steel support strip. The suction holes are located at the lower ends of the left and right side walls of the guide groove, which can quickly guide and suck out dust and debris from the equipment. The connecting components are located at the front and rear ends of the stainless steel support strip.

[0007] Furthermore, the guide groove is V-shaped, which creates a cavity in the middle of the upper part of the stainless steel support bar, reducing the area of ​​the upper part of the stainless steel support bar and thus reducing the contact area between the stainless steel support bar and the stainless steel mesh belt.

[0008] Furthermore, the cleaning mechanism also includes Teflon tape, which is disposed on the upper end of the stainless steel support strip. The upper end of the Teflon tape is attached to the lower end of the stainless steel mesh belt, reducing the friction at the contact point between the stainless steel support strip and the stainless steel mesh belt. At the same time, the high temperature resistance of the Teflon tape can prevent the upper end of the stainless steel support strip from overheating, avoiding the situation where high temperature simultaneously heats both the stainless steel support strip and the stainless steel mesh belt, leading to accelerated wear.

[0009] Furthermore, the connecting assembly includes a first connecting pipe and a second connecting pipe. The first connecting pipe is located at the front end of the stainless steel support bar, and the second connecting pipe is located at the rear end of the stainless steel support bar. The outer surface of the first connecting pipe is fitted with the inner wall of the second connecting pipe for connection between two adjacent stainless steel support bars.

[0010] Furthermore, the connecting assembly also includes sealing rings, which are all disposed on the front side of the inner wall of the second connecting pipe. The front end of the first connecting pipe is fitted with the rear end of the sealing ring to provide a sealing effect for the connection of two adjacent stainless steel support bars.

[0011] Furthermore, it also includes limiting grooves, fixing wings, and bolt holes. The limiting grooves are all opened inside the upper end of the mounting plate, the fixing wings are respectively set in the middle of the left and right sides of the stainless steel support strip, and the bolt holes are all opened at the upper end of the fixing wings, providing a limiting effect for the installation of the stainless steel support strip.

[0012] Furthermore, it also includes positioning screws. The upper end of the mounting plate is provided with positioning holes, which are vertically adjacent to the bolt holes. The positioning screws are threaded into the inside of the positioning holes, and the middle of the outer surface of the positioning screws penetrates the inner wall of the vertically adjacent bolt holes, providing a quick positioning effect for the installation of stainless steel support strips.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By opening guide grooves, the area of ​​the upper end of the stainless steel support bar is reduced, thereby reducing the contact area between the stainless steel support bar and the stainless steel mesh belt. Combined with the high temperature resistance and smooth surface of Teflon tape, the temperature and friction of the contact area are reduced, and the generation of dust and debris is reduced.

[0015] 2. By connecting adjacent longitudinal suction chambers together to form a passage, the pressure in the passage is reduced by an external air pump, which quickly guides the dust and debris generated by friction to the bottom of the guide groove. Then, the suction hole passes through the passage and is sucked out of the equipment, avoiding the need for downtime for cleaning and improving the soldering effect and efficiency of the PCB board. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the stainless steel support strip structure of this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the connecting component of this utility model;

[0019] Figure 4 This is a schematic diagram of the suction hole structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the end face structure of the stainless steel support strip of this utility model.

[0021] In the diagram: 1 Mounting plate, 2 Stainless steel support strip, 3 Stainless steel mesh belt, 4 Cleaning mechanism, 41 Suction chamber, 42 Guide groove, 43 Suction hole, 44 Teflon tape, 45 Connecting assembly, 451 Connecting pipe one, 452 Connecting pipe two, 453 Sealing ring, 5 Limiting groove, 6 Fixing wing, 7 Bolt hole, 8 Positioning screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This embodiment provides a technical solution: a high-cleanliness, high-temperature resistant mesh belt assembly, including a mounting plate 1 and a cleaning mechanism 4; the upper end of the mounting plate 1 is provided with a stainless steel mesh belt 3, which transports PCB boards through an external guide rail and a sprocket; stainless steel support bars are provided between two longitudinally adjacent mounting plates 1; it also includes limiting grooves 5, fixing wings 6, and bolt holes 7; the limiting grooves 5 are all opened inside the upper end of the mounting plate 1; the fixing wings 6 are respectively set in the middle of the left and right sides of the stainless steel support bars 2; the bolt holes 7 are all opened at the upper end of the fixing wings 6, providing a limiting effect for the installation of the stainless steel support bars 2; it also includes positioning screws 8; the upper end of the mounting plate 1 is provided with positioning holes, which are vertically adjacent to the bolt holes 7; the positioning screws 8 are all threaded into the interior of the positioning holes; the middle of the outer surface of the positioning screws 8 penetrates the inner wall of the vertically adjacent bolt holes 7, providing a rapid positioning effect for the installation of the stainless steel support bars 2.

[0024] The cleaning mechanism 4 includes a suction chamber 41, a guide groove 42, suction holes 43, and a connecting assembly 45. The suction chambers 41 are respectively opened on the left and right sides inside the stainless steel support bar 2. Each stainless steel support bar 2 has two suction chambers 41 inside. The inner walls of the front and rear of the suction chambers 41 are chamfered to prevent dust and debris from getting stuck on the inner walls of the suction chambers 41 during the extraction process. The guide groove 42 is opened at the upper end of the stainless steel support bar 2. The suction holes 43 are respectively set at the lower ends of the left and right side walls of the guide groove 42, which can quickly guide and suck out the dust and debris from the equipment. The guide groove 42 is V-shaped. The guide groove 42 forms a cavity area in the middle of the upper end of the stainless steel support bar 2, reducing the area of ​​the upper end of the stainless steel support bar 2, thereby reducing the contact area between the stainless steel support bar 2 and the stainless steel mesh belt 3.

[0025] The cleaning mechanism 4 also includes Teflon tape 44, which is installed on the upper end of the stainless steel support strip 2. Teflon tape 44, also known as PTFE tape, is a high-performance, high-temperature resistant tape made primarily of polytetrafluoroethylene (PTFE). It possesses excellent anti-sticking properties, chemical corrosion resistance, and insulation performance, and is widely used in high-temperature industrial applications. The upper end of the Teflon tape 44 is attached to the lower end of the stainless steel mesh belt 3, reducing the friction at the contact point between the stainless steel support strip 2 and the stainless steel mesh belt 3. Simultaneously, the high-temperature resistance of the Teflon tape 44 prevents overheating of the upper end of the stainless steel support strip 2, avoiding the situation where high temperatures simultaneously heat both the stainless steel support strip 2 and the stainless steel mesh belt 3, leading to accelerated wear.

[0026] The connecting components 45 are respectively disposed at the front and rear ends of the stainless steel support strip 2. The connecting components 45 include a first connecting pipe 451 and a second connecting pipe 452. The first connecting pipe 451 is disposed at the front end of the stainless steel support strip 2, and the second connecting pipe 452 is disposed at the rear end of the stainless steel support strip 2. The outer surface of the first connecting pipe 451 is fitted with the inner wall of the second connecting pipe 452 and inserted into the inner wall of the second connecting pipe 452 for connecting two adjacent stainless steel support strips 2. The connecting components 45 also include sealing rings 453. The sealing rings 453 are disposed on the front side of the inner wall of the second connecting pipe 452. The front end of the first connecting pipe 451 is fitted with the rear end of the sealing ring 453 and is in contact with the rear end of the sealing ring 453. The foremost first connecting pipe 451 is connected to the external air intake pipe, and the rearmost second connecting pipe 452 is connected to the external air pump. After the stainless steel support bar 2 is installed and the suction chamber 41 is connected by the connecting component 45 to form a passage, the external air pump works. Gas enters the passage from the external air inlet pipe and is then extracted by the external air pump. During this process, the air velocity inside the passage is high and the pressure is low, while the pressure outside the guide groove 42 is high. The debris generated by friction will be sucked into the passage with the pressure difference and then carried out of the equipment, providing a sealing effect for the connection of the two adjacent stainless steel support bars 2. A cleaning mechanism 4 is provided. By opening the guide groove 42, the contact area between the stainless steel support bar 2 and the stainless steel mesh belt 3 is reduced. With the Teflon tape 44, friction is reduced. At the same time, the dust and debris generated by friction can be quickly guided to the bottom of the guide groove 42. Then, the dust and debris generated by friction are quickly cleaned out of the equipment by the principle of pressure difference, avoiding the need for downtime for cleaning.

[0027] The working principle of this utility model is as follows:

[0028] Before use, first attach Teflon tape 44 to the upper end of the stainless steel support strip 2, so that the Teflon tape 44 fills the contact area between the stainless steel support strip 2 and the stainless steel mesh belt 3. Then, install the stainless steel support strip 2 from front to back. First, offset the stainless steel support strip 2 from the front mounting plate 1, so that the back mounting plate 1 is located in the middle of the stainless steel support strip 2. At this time, the middle of the stainless steel support strip 2 is not restricted by the fixing wings 6, and can be easily inserted into the limiting groove 5 on the back mounting plate 1. Then, slide the stainless steel support strip 2 forward until the two fixing wings 6 at the front end of the stainless steel support strip 2 slide into the limiting groove 5 on the front mounting plate 1.

[0029] Then, align the bolt holes 7 on the fixed wing 6 vertically with the positioning holes on the mounting plate 1, and screw in the positioning screws 8 to fix the first stainless steel support strip 2 in place. Then, install the second stainless steel support strip 2 in the same manner. When the second stainless steel support strip 2 slides forward, due to the limiting groove 5 and the fixed wing 6, the connecting tube 451 at the front end of the second stainless steel support strip 2 will insert into the connecting tube 452 at the rear end of the first stainless steel support strip 2, until the front end of the connecting tube 451 of the second stainless steel support strip 2 is tightly fitted with the rear end of the sealing ring 453 inside the connecting tube 452 of the first stainless steel support strip 2. At this point, screw in the positioning screws 8, and the second stainless steel support strip 2 is also fixed in place. This process is repeated. Until all stainless steel support bars 2 are fixed in place, the longitudinally adjacent stainless steel support bars 2 form a passage through the connection of connecting pipe 1 451, connecting pipe 2 452 and sealing ring 453. In use, the guide groove 42 reduces the area of ​​the upper end of the stainless steel support bar 2, thereby reducing the contact area between the stainless steel support bar 2 and the stainless steel mesh belt 3, initially slowing down the occurrence of wear. As the stainless steel mesh belt 3 continues to operate, due to the high temperature resistance and smooth surface of the Teflon tape 44, the area of ​​the stainless steel support bar 2 with the Teflon tape 44 will not overheat, and there will be no situation where both the stainless steel support bar 2 and the stainless steel mesh belt 3 overheat and aggravate the wear at the contact point. The smooth surface of the Teflon tape 44 can also reduce the friction in the contact area.

[0030] After prolonged operation, continuous friction will still generate a small amount of dust and debris. When the external air pump operates, the pressure inside the stainless steel support bar 2 decreases, and the pressure inside the guide groove 42 also decreases. As the pressure changes, the dust and debris will first be sucked into the guide groove 42, and then enter the suction chamber 41 through the suction hole 43. The connecting component 45 connects the longitudinally adjacent suction chambers 41 together to form a passage. The dust and debris will be sucked out of the equipment through this passage, completing the cleaning of the mesh belt assembly.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-cleanliness, high-temperature resistant mesh belt assembly, characterized in that: Includes mounting plate (1) and cleaning mechanism (4); The upper end of the mounting plate (1) is provided with a stainless steel mesh belt (3), and stainless steel support strips (2) are provided between two longitudinally adjacent mounting plates (1); The cleaning mechanism (4) includes a suction chamber (41), a guide groove (42), a suction hole (43), and a connecting component (45). The suction chamber (41) is located on the left and right sides inside the stainless steel support strip (2). The guide groove (42) is located at the upper end inside the stainless steel support strip (2). The suction holes (43) are located at the lower ends of the left and right side walls of the guide groove (42). The connecting component (45) is located at the front and rear ends of the stainless steel support strip (2).

2. The high-cleanliness, high-temperature resistant mesh belt assembly according to claim 1, characterized in that: The guide groove (42) is V-shaped, and the guide groove (42) forms a cavity area in the middle of the upper end of the stainless steel support bar (2).

3. The high-cleanliness, high-temperature resistant mesh belt assembly according to claim 1, characterized in that: The cleaning mechanism (4) also includes Teflon tape (44), which is set on the upper end of the stainless steel support bar (2), and the upper end of the Teflon tape (44) is attached to the lower end of the stainless steel mesh belt (3).

4. The high-cleanliness, high-temperature resistant mesh belt assembly according to claim 1, characterized in that: The connecting assembly (45) includes a first connecting pipe (451) and a second connecting pipe (452). The first connecting pipe (451) is located at the front end of the stainless steel support bar (2), and the second connecting pipe (452) is located at the rear end of the stainless steel support bar (2). The outer surface of the first connecting pipe (451) is fitted with the inner wall of the second connecting pipe (452).

5. The high-cleanliness, high-temperature resistant mesh belt assembly according to claim 4, characterized in that: The connecting assembly (45) also includes a sealing ring (453), which is disposed on the front side of the inner wall of the second connecting pipe (452), and the front end of the first connecting pipe (451) is fitted with the rear end of the sealing ring (453).

6. The high-cleanliness, high-temperature resistant mesh belt assembly according to claim 1, characterized in that: It also includes a limiting groove (5), a fixed wing (6) and a bolt hole (7). The limiting groove (5) is opened inside the upper end of the mounting plate (1), the fixed wing (6) is respectively set in the middle of the left and right sides of the stainless steel support strip (2), and the bolt hole (7) is opened at the upper end of the fixed wing (6).

7. The high-cleanliness, high-temperature resistant mesh belt assembly according to claim 6, characterized in that: It also includes positioning screws (8). The upper end of the mounting plate (1) is provided with positioning holes. The positioning holes are vertically adjacent to the bolt holes (7). The positioning screws (8) are threaded into the inside of the positioning holes. The middle part of the outer surface of the positioning screws (8) penetrates the inner wall of the vertically adjacent bolt holes (7).

Images