Tin bath for electronic part tin immersion

Abstract

The utility model provides a tin bath for electronic part tin immersion, which comprises a heating tank, a scum tank is arranged on one side of the heating tank, a side plate on the heating tank adjacent to the scum tank is a buffer plate, the buffer plate is hooked with the scum tank, the top surface of the buffer plate is a buffer surface, and fillets are arranged at the joints of the buffer surface and the two side surfaces of the buffer plate. A scraping plate group is arranged above the heating tank, the scraping plate group is connected with a lifting driving mechanism, the lifting driving mechanism is connected with a transverse moving driving mechanism, the scraping plate group comprises a scraping plate and a scraping strip, a through opening is formed in the scraping plate, and the scraping strip penetrates through the through opening and is hinged to the scraping plate; an elastic piece is arranged between the side, away from the scum groove, of the scraping strip and the inner wall of the through opening, a scraping groove is formed in the side, close to the scum groove, of the bottom end of the scraping strip, and a scum removing plate used for scraping residues on the surface of the scraping strip is arranged in the scum groove. Residues on the scraping groove are cleaned through the residue removing plate, residue accumulation is effectively avoided, and the residue scraping effect of the scraping strip is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electronic component production equipment, and specifically relates to a solder bath for immersing electronic components in solder. Background Technology

[0002] Surface mount inductors are a common type of surface mount electronic component. During the production process of surface mount inductors, the inductor's coil windings and pads need to be immersed in molten solder to make the coil windings and pads soldered together.

[0003] In existing technologies, a heated bath is mainly used to keep tin metal in a liquid state for continuous tinning. However, after each batch of inductors is tinned, a layer of slag remains on the surface of the molten tin. Therefore, a slag scraping mechanism is usually used in conjunction with the heated bath during the tinning process. The slag scraping mechanism mainly includes a scraper and related components that drive the scraper to reciprocate above the heated bath. By setting a protruding scraper strip at the bottom of the scraper and extending the scraper strip into the liquid surface, the scraper can remove the slag from the surface of the molten tin during the reciprocating motion.

[0004] After each batch of inductors is immersed in tin, a slag scraping mechanism is required to scrape the surface of the molten tin. The scraping frequency is high and the number of scraping operations is large. As a result, a lot of residue will accumulate on the scraper during long-term operation, which will reduce the scraping effect. Some residue will also be carried back into the heating tank by the molten tin, causing contamination of the molten tin. Utility Model Content

[0005] To overcome the shortcomings and problems of existing technologies, reduce tin residue on the scraper, reduce equipment maintenance frequency, and improve the slag removal effect on the surface of molten tin, this utility model provides a tin bath for immersing electronic components.

[0006] This utility model is achieved through the following technical solution:

[0007] A tin bath for immersing electronic components includes a heating bath with a slag tank on one side. A buffer plate is located on one side of the heating bath adjacent to the slag tank, and the buffer plate is hooked to the slag tank. The top surface of the buffer plate is a buffer surface, and rounded corners are provided at the connection points between the buffer surface and both sides of the buffer plate. A scraper assembly is located above the heating bath, and the scraper assembly is connected to a lifting drive mechanism, which is connected to a lateral drive mechanism. The scraper assembly includes a scraper and a scraper strip. An opening is formed on the scraper, and the scraper strip passes through the opening and is hinged to the scraper. An elastic element is provided between the side of the scraper strip away from the slag tank and the inner wall of the opening. A scraping groove is provided on the bottom end of the scraper strip near the slag tank. A slag removal plate for scraping off residue from the surface of the scraper strip is provided inside the slag tank.

[0008] The top of the slag removal plate is curved in an arc shape, with the bending direction opposite to the scraper groove, and the end gradually becomes thinner.

[0009] The top surface of the scraper is provided with two connecting seats, which correspond to the two ends of the opening respectively. The scraper is located between the two connecting seats, and the scraper is installed and fixed by a connecting rod passing through the two connecting seats and the top of the scraper.

[0010] The lifting drive mechanism includes a second slide, the traversing drive mechanism includes a first slide, the first slide is connected to a slider, the top of the slider is provided with a connecting seat, the second slide is mounted on the connecting seat, and the scraper assembly is connected to the second slide.

[0011] The scraper assembly also includes a connecting plate, the end of the scraper is perpendicularly connected to the connecting plate, the connecting plate is connected to the second slide, and a support plate is provided between the scraper and the connecting plate.

[0012] The top side of the buffer plate is provided with a downward hooking groove, one side plate of the scum trough is connected to the hooking groove, and the buffer surface covers the hooking groove.

[0013] The top of the buffer plate is also provided with side guards at both ends.

[0014] It also includes a base, which is located below the heating tank and the scum tank. The top surface of the base is provided with a dislocation groove, which is located below the scum tank.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention uses a scraper blade hinged to the scraper to clean the slag on the surface of the molten tin. A scraper groove is provided on one side of the bottom end of the scraper blade. When scraping slag, the slag will enter the scraper groove to prevent the slag from deviating and improve the slag scraping effect.

[0017] Meanwhile, in this utility model, the top surface of the buffer plate is a buffer surface, and the connection between the buffer surface and the two sides of the buffer plate is provided with rounded corners. When the scraper moves the scum over the buffer surface, it will tilt at a certain angle due to the obstruction of the buffer plate. The lower end of the scraper groove can then scrape the scum onto the buffer surface with the rounded corners during the tilting process, and move along the buffer surface, moving the scum over the buffer surface and into the scum trough.

[0018] When the scraper enters the scum trough and passes the scraper plate, the scraper is tilted due to the resistance of the scraper plate. The upper end of the scraper plate can then slide against the trough during the movement of the scraper, scraping the residue in the trough into the scum trough, effectively preventing the accumulation of residue. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the heating tank and scum tank of this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the scraper of this utility model;

[0022] Figure 4 This is a schematic cross-sectional view of the scraper structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the working state of the scraper and the buffer plate of this utility model;

[0024] Figure 6 This is a schematic diagram of the working state of the scraper and the slag removal plate of this utility model.

[0025] In the diagram: 100-base, 110-dislocation groove, 200-heating tank, 210-buffer plate, 211-buffer surface, 212-rounded corner, 213-hooking groove, 214-side baffle, 300-scum tank, 310-scum removal plate, 400-scraper assembly, 410-scraper, 411-connecting block, 412-through opening, 413-connecting rod, 414-elastic element, 420-scraper strip, 421-scraper groove, 430-connecting plate, 440-support plate, 500-lifting drive mechanism, 510-second slide, 600-transverse drive mechanism, 610-first slide, 620-slider, 630-connecting seat. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1 , 2As shown, a solder bath for immersing electronic components includes a heating tank 200, which holds molten solder and maintains the tin in a liquid state. During the immersion process, an external material transfer device moves the surface-mount inductor to the surface of the molten solder for immersion. A slag tank 300 is provided on one side of the heating tank 200, which holds the slag removed from the surface of the molten solder during subsequent slag removal. The side plate adjacent to the slag tank 300 on the heating tank 200 is a buffer plate 210. The buffer plate 210 serves as a transition buffer between the heating tank 200 and the slag tank 300. The top surface of the buffer plate 210 is a buffer surface 211. During subsequent slag scraping, the slag scraped out will pass through the buffer surface 211 into the slag tank 300. The connection points between the buffer surface 211 and both sides of the buffer plate 210 are rounded at corners 212. These rounded corners 212 facilitate the smooth entry of slag scraped out of the heating tank 200 onto the buffer surface 211 and into the slag tank 300. It should be noted that the buffer surface 211 is at the same horizontal level as the molten tin. Due to the surface tension of the molten tin, the molten tin will not flow out of the buffer surface 211 at will, while also facilitating the scraping of slag into the buffer surface 211.

[0028] like Figure 2 As shown, a downward-facing hooking groove 213 is provided on one side of the top of the buffer plate 210. One side plate of the scum trough 300 is connected to the hooking groove 213, and the buffer surface 211 covers the hooking groove 213. This structure ensures that when scum flows out through the buffer surface 211, it will not fall between the scum trough 300 and the buffer plate 210, but will fall directly into the scum trough 300 through one end of the buffer surface 211. At the same time, the hooking groove 213 can also prevent the scum trough 300 from becoming loose under conditions other than human control. Side baffles 214 are also provided at both ends of the top of the buffer plate 210. The side baffles 214 can prevent scum from flowing out from both ends of the buffer surface 211 to the outside when passing through the buffer surface 211. In this embodiment, a base 100 is also included. The base 100 is located below the heating tank 200 and the scum tank 300. The base 100 is used to place the heating tank 200 and the scum tank 300 to prevent the high temperature of the heating tank 200 from affecting the external working platform.

[0029] It should be noted that the side plate on the scum trough 300, which is used to engage with the hooking groove 213, has its end lower than the top surface of the hooking groove 213. Simultaneously, the top surface of the base 100 is provided with a disengagement groove 110, located below the scum trough 300. The cooperation of these two structures facilitates the scum trough 300's disengagement from the hooking groove 213. When it is necessary to remove the scum trough 300, it is lifted. At this point, there is a movable space between the bottom of the scum trough 300 and the base 100, and the disengagement groove 110 provides even more space. The bottom of the scum trough 300 can then be tilted and rotated at a certain angle. After the scum trough 300 is tilted, it can be disengaged from the hooking groove 213.

[0030] like Figure 1 , 3 As shown in Figure 4, a scraper assembly 400 is provided above the heating tank 200. The scraper assembly 400 includes a scraper 410 and a scraper strip 420. The scraper strip 420 is used to scrape the slag on the surface of the molten tin into the slag tank 300. The scraper 410 is used to install and fix the scraper strip 420 and drive the scraper strip 420 to move. The scraper 410 has a through-hole 412. The scraper strip 420 passes through the through-hole 412 and is hinged to the scraper 410. The top surface of the scraper 410 has two connecting blocks 411, which correspond to the two ends of the through-hole 412 respectively. The scraper strip 420 is located between the two connecting blocks 411. The scraper strip 420 is installed and fixed by a connecting rod 413 passing through the two connecting blocks 411 and the top end of the scraper strip 420. The scraper strip 420 can rotate at a certain angle at the through-hole 412. An elastic element 414 is provided between the side of the scraper 420 away from the scum trough 300 and the inner wall of the opening 412. The elastic element 414 is used to drive the rotated scraper 420 to return to its original position. A scraping groove 421 is provided on the bottom end of the scraper 420 near the scum trough 300. The scraper 420 scrapes the scum into the scum trough 300 through the scraping groove 421. When the scraper 420 scrapes the scum, the scum will enter the scraping groove 421, reducing scum deviation and improving the scraping effect.

[0031] like Figure 5 , 6As shown, during the slag scraping process, the scraper assembly 400 moves from above the heating tank 200 towards the slag tank 300, carrying the slag into the slag tank 300 during the movement. In this embodiment, the top surface of the buffer plate 210 is the buffer surface 211, and the connection between the buffer surface 211 and the two sides of the buffer plate 210 is provided with rounded corners 212. When the scraper 420 carries the slag past the buffer surface 211, it will tilt at a certain angle due to the obstruction of the buffer plate 210, and the lower end of the scraper groove 421 can scrape the slag onto the buffer surface 211 in conjunction with the rounded corners 212 during the tilting process. When the scraper 420 moves on the buffer surface 211, the bottom end of the scraper groove 421 will move in contact with the buffer surface 211 to carry the slag in the scraper groove 421 past the buffer surface 211 and fall into the slag tank 300. In this embodiment, the scum trough 300 is also provided with a slag removal plate 310 for scraping the residue in the scraping groove 421. The top of the slag removal plate 310 is curved in an arc shape, with the bending direction opposite to the scraping groove 421, and the end gradually becomes thinner. After the scraper 420 scrapes the scum into the scum trough 300, it will move towards the slag removal plate 310 to ensure that the scraping groove 421 can pass through the slag removal plate 310. During this process, the scraper 420 is tilted due to the resistance of the slag removal plate, and the end of the slag removal plate 310 will pass through the scraping groove 421, scraping the residue in the scraping groove 421 into the scum trough 300.

[0032] It should be noted that during the slag scraping process in this embodiment, the scraper assembly 400 needs to be displaced to perform normal slag scraping. In this embodiment, the scraper assembly 400 is connected to a lifting drive mechanism 500, and the lifting drive mechanism 500 is connected to a lateral drive mechanism 600, such as... Figure 1 As shown, in this embodiment, the scraper assembly 400 achieves lifting and horizontal displacement through the driving of the lifting drive mechanism 500 and the lateral drive mechanism 600. The lifting drive mechanism 500 includes a second slide 510, and the lateral drive mechanism 600 includes a first slide 610. The first slide 610 is connected to a slider 620, and the top of the slider 620 is provided with a connecting seat 630. The second slide 510 is mounted on the connecting seat 630, and the scraper assembly 400 is connected to the second slide 510. The scraper assembly 400 also includes a connecting plate 430. The ends of the scrapers 410 are perpendicularly connected to the connecting plate 430, and the connecting plate 430 is connected to the second slide 510. A support plate 440 is also provided between the scraper 410 and the connecting plate 430 to provide support for the scraper 410 and reduce vibration.

[0033] At the end of each tin-dipping operation, the scraper assembly 400 is positioned above the slag tank 300. The second slide 510 drives the scraper assembly 400 upwards, and the first slide 610 then drives the scraper assembly 400 to move above the heating tank 200. Subsequently, the second slide 510 drives the scraper assembly 400 downwards to the height of the middle of the scraping tank 421 at the surface of the molten tin. Finally, the first slide 610 drives the scraper assembly 400 towards the slag tank 300, completing the slag removal operation. After the slag removal operation is completed, the heating tank 200 continues the tin-dipping operation, while the scraper assembly 400 performs the slag removal operation after each tin-dipping operation. The tin-dipping and slag removal operations alternate continuously in a cycle, achieving fully automated operation.

[0034] The above embodiments are preferred implementations of this utility model and are not intended to limit this utility model. Any obvious substitutions are within the protection scope of this utility model without departing from its inventive concept.

Claims

1. A tin bath for tinning electronic components, comprising a heating bath (200), wherein a slag tank (300) is provided on one side of the heating bath (200), characterized in that: The side plate adjacent to the scum tank (300) on the heating tank (200) is a buffer plate (210). The buffer plate (210) is hooked to the scum tank (300). The top surface of the buffer plate (210) is a buffer surface (211). The connection between the buffer surface (211) and the two sides of the buffer plate (210) is provided with rounded corners (212). A scraper assembly (400) is provided above the heating tank (200). The scraper assembly (400) is connected to a lifting drive mechanism (500). The lifting drive mechanism (500) is connected to a transverse drive mechanism (600). The scraper... The assembly (400) includes a scraper (410) and a scraper (420). The scraper (410) has an opening (412). The scraper (420) passes through the opening (412) and is hinged to the scraper (410). An elastic element (414) is provided between the side of the scraper (420) away from the scum tank (300) and the inner wall of the opening (412). A scraper groove (421) is provided on the bottom end of the scraper (420) near the scum tank (300). A slag removal plate (310) for scraping off the residue on the surface of the scraper (420) is provided in the scum tank (300).

2. The solder bath for immersion soldering of electronic components according to claim 1, characterized in that: The top of the slag removal plate (310) is curved in an arc shape, with the bending direction opposite to the scraper groove (421), and the end gradually becomes thinner.

3. The solder bath for immersion soldering of electronic components according to claim 2, characterized in that: The top surface of the scraper (410) is provided with two connecting blocks (411), which correspond to the two ends of the opening (412) respectively. The scraper (420) is located between the two connecting blocks (411), and the scraper (420) is installed and fixed by a connecting rod (413) passing through the top of the two connecting blocks (411) and the scraper (420).

4. A solder bath for immersing electronic components according to claim 3, characterized in that: The lifting drive mechanism (500) includes a second slide (510), the transverse drive mechanism (600) includes a first slide (610), the first slide (610) is connected to a slider (620), the top of the slider (620) is provided with a connecting seat (630), the second slide (510) is mounted on the connecting seat (630), and the scraper assembly (400) is connected to the second slide (510).

5. A solder bath for immersing electronic components according to claim 4, characterized in that: The scraper assembly (400) further includes a connecting plate (430), the end of the scraper (410) is perpendicularly connected to the connecting plate (430), the connecting plate (430) is connected to the second slide (510), and a support plate (440) is provided between the scraper (410) and the connecting plate (430).

6. A solder bath for immersing electronic components according to claim 5, characterized in that: The top side of the buffer plate (210) is provided with a downward hooking groove (213), and one side plate of the scum trough (300) is connected to the hooking groove (213). The buffer surface (211) covers the hooking groove (213).

7. A solder bath for immersing electronic components according to claim 6, characterized in that: The buffer plate (210) is also provided with side blocks (214) at both ends of the top.

8. A solder bath for immersing electronic components according to any one of claims 1-7, characterized in that: It also includes a base (100) located below the heating tank (200) and the scum tank (300). The top surface of the base (100) is provided with a dislocation groove (110) located below the scum tank (300).

Images