[0032] Example
[0033] Please refer to figure 1 In this embodiment, the present embodiment provides an ultrasonic tin plating device including: a closed tin groove 1, an ultrasonic vibration device 4, and a tin pump 3; a closed tin groove 1 includes a cavity and a door 6, a cavity has a first The chamber 11, the second chamber 12, and the second chamber 12 are provided with an opening, which can be opened to the opening and can be opened or closed, and the first chamber 11 communicates with the second chamber 12, tin pump. 3 For the second chamber 12 pump the tin liquid from the first chamber 11, the ultrasonic vibration device 4 is disposed in the cavity and is used to transfer ultrasonic energy to the tin liquid in the second chamber 12.
[0034] Among them, it can be chosen that the long width size of the ultrasonic tin plating area of the ultrasonic vibration device 4 is greater than 50 mm × 50 mm. In the present embodiment, the long-width of the ultrasonic tin plating area of the ultrasonic vibration device 4 is greater than 80 mm × 80 mm, and as the size of the tinned area is increased, the size of the corresponding opening also increases to facilitate mass production. To meet the needs of large scale immersion tin.
[0035] Among them, the first chamber 11 and the second chamber 12 are filled with protective gas. The protective gas used in this example is nitrogen. In addition, the cavity is provided with a liquid level sensor. When the tin liquid is insufficient, an alarm can be automatically issued.
[0036] Specifically, the ultrasonic tin plating apparatus of the present application also includes a scraping device 5, a scraping device 5 is disposed in the second chamber 12, and the scraping device 5 is used to scraping the solder residue in the second chamber 12.
[0037] It will be appreciated that the scraping device 5 is pushed to other places to other places, so that there is no tin residue over the ultrasonic vibration device 4. You can choose to separately provide a chamber separately in the cavity to accommodate the tin slag that is pushed, or may be selected in the outer portion of the cavity, and the receiving device is in communication with the second chamber 12 to receive the scraping device 5 push. Come of the tin slag. In the present embodiment, the tin residue is sent to the first chamber 11.
[0038] Please combine figure 1 , In detail, the closed tin groove 1 of the present embodiment further includes a partition plate 2, separating the space within the cavity into the first chamber 11 and the second chamber 12, tin pump 3 in the separator 2 The tin liquid is pumped to the second chamber 12, and the scraping device 5 is pushed to the first chamber 11 from the second chamber 12 over the partition plate 2, and the tin residue can be melted. Stroke liquid for reuse. The enclosed tin groove 1 of the present embodiment is provided with a heating device for melt tin into tin liquid. It is also conceivable to provide a heating device outside the closed tin groove 1 to radiate heat to the closed tin groove 1 such that tin is melted.
[0039] Among them, the cross-sectional profile of the partition plate 2 in the present embodiment is L-shaped, and there is a spacing between the bottom wall of the partition plate 2 and the bottom wall of the cavity, the tin pump 3 can be used to the second cavity to the second cavity The chamber 12 is pumped, the tin liquid height in the second chamber 12 will be high over-separator 2 and overflow to the first chamber 11, which provides a new tin liquid in the first chamber 11, and considering the present application The second chamber 12 is in order to adapt to large-scale tin plating operations, and the size of the second chamber 12 is not completely drumped into the first chamber 11, the present embodiment is designed in the first chamber 11. The tin device 5 is pushed into the first chamber 11 such that the tin oxide surface of the tin liquid surface of the second chamber 12 is thoroughly removed, and it is convenient for subsequent terminal 7 to immersion tin.
[0040] Please combine Figure 4 and Figure 5 Specifically, the ultrasonic vibration device 4 of the present application includes a vibrating head 43, a plurality of transducers 41, and a plurality of benenate rods 42, each transducer 41 corresponds to a variable web 42, a plurality of gallout rods. 42 is connected to the vibrating head 43, and the vibrating head 43 is connected to the cavity and extends into the second chamber 12. The plurality of transducers 41 can achieve large area tin, since there is a scraping device 5, the tin oxide residue above the plurality of transducers 41 can be scraped, and the synergy of the plurality of transducer 41 is not affected.
[0041] Please combine figure 1 or image 3 Wherein, it is possible to select whether the spacing H1 of the liquid surface of the tin liquid in the second chamber 12 is from 1 to 50 mm from the top distance of the top portion of the vibrating head 43. In the present embodiment, the spacing H1 of the liquid surface of the vibrating head 43 is from 5 to 30 mm. The ultrasonic vibration device 4 of the present application uses an ultrasonic frequency of 15 to 40 kHz, in the present embodiment, the ultrasonic frequency of 15 to 25 kHz is used.
[0042] Among them, the vibrating head 43 of the present embodiment is provided with a projection ring, which can be used to connect to a cavity. It should be noted, Figure 5 The relative position between the transducer 41, the variable hose 42 and the vibrating head 43 is not shown, and the raised ring is not shown.
[0043] In order to achieve large-scale immersion tin, the area of the vibrating head 43 of the present embodiment is larger than the conventional vibrating head, and the four sets of transducer 41 and the berry rod 42 are disposed. Ultrasonic tinning requires an energy density of 3 to 20 W / cm2, in order to achieve large area immersion tin, the tin plating of the plurality of component terminals 7 can be completed, for large-area vibrating heads 43, single transducer is difficult to meet the energy density The requirements are therefore a need for a plurality of transducers 41 and a variable rod 42 to provide sufficient ultrasonic energy.
[0044] Further, since the tin above the vibrating head 43 occurs, when the transducer 41 is operated, the tin liquid will bulge, when there are multiple transducers 41, the tin drum directly above each transducer 41 The height of the origin is not complete, especially the central position of the vibrating head 43, and the tin liquid will be lower than the height of the tin liquid above the transducer 41, form a recess. At this time, the tin oxide residue will operate at the recess, the tin pump 3, due to the disturbance of the vibrating head 43, coupled with the ordinary vibrating head 43 of the present application, which is more obvious, so that this disturbance will be more obvious. Tin oxide slag is difficult to remove, and cannot be surprised to the left side of the partition plate 2 as tin liquid. And for large-area tin plating, the tin pump 3 is required to carry out large area drums, and the energy required is large, which is likely to cause disturbances such as liquid surface turbulence.
[0045] Therefore, the present embodiment is designed with a scratch device 5, and there is a height of the tin liquid in the cavity itself, first by tin pump 3, so that the tin liquid surface of the second chamber 12 is raised to exceeded Separator 2, and then use the scraping device 5 to work back and forth in the left and right or front-rear directions, so that the tin oxidation of the liquid surface is scraped. Even if the recess is located, the tin oxide slag can be scraped by the scraping device 5. Among them, the front-rear direction refers to figure 2 Under the perspective shown, on the horizontal plane figure 2 The left and right directions are perpendicular to each other.
[0046] After the tin pump 3 drums are completed, the tin pump 3 stops working, the liquid level remains stationary; then scratch, after the scratch operation is completed, the ultrasonic vibration device 4 performs ultrasonic vibration. At this time, the tin of the liquid surface is not oxidized, so that high quality tin can be achieved. In addition to the protection of nitrogen, it can further ensure that the surface of the tin liquid during tin is not oxidized, and the high quality of tin plating is guaranteed. Each batch of terminal 7 is in front of tin, the flow of drum, scraping, and ultrasonic vibration will be implemented again, ensuring that each batch is tinned by high quality. Moreover, due to the opening and closing of the door 6, the outer air can be reduced, the external air enters the cavity, and the oxidation speed of the tin liquid can be reduced, so that the quality of tin plating can be ensured with the above nitrogen protection and scratch operation. .
[0047] Since there is no tin oxide residue on the surface of the tin liquid by scratching, the tin pump 3 is smaller, the energy consumption is lower, and only the tin liquid from the first chamber 11 into the second chamber only in a period of time. 12, there is no need to continuous drums, avoiding different Tin heights of different terminals 7, making it easier to ensure the quality of tin plating.
[0048] In the present application, the ultrasonic tin plating device further includes a lifting device 8, and the lifting device 8 is in the outer side of the closed tin groove 1 and is located above the opening, and the lifting device 8 is configured to drive the terminal 7 into the second chamber 12. Further, the lifting device 8 also has a ranging apparatus, and the ranging device can detect the spacing of the liquid plane of the tin liquid of the second chamber 12 such that the lifting device 8 can adjust the decline in the decline, thereby ensuring each time The tinned terminal 7 is immersed in the height of the tin liquid.
[0049] The mode of operation of the present embodiment is based on the above-described ultrasonic tin plating device, and embodiments of the present invention provide a tin plating method including: tin pump 3 pumped tin liquid in the first chamber 11 to the second. The chamber 12 and causes the ultrasonic vibration device 4 to be submerged by tin liquid; open the door 6, the terminal 7 is placed, and the terminal 7 into the tin liquid; the ultrasonic vibration device 4 operates.
[0050] Wherein, the tin in the first chamber 11 and the second chamber 12 is first melted into tin liquid by the heating device, under gravity, the liquid surface in the two chambers is contrary.
[0051] Since the ultrasonic tin plating device also includes a scraping device 5, the above method further includes a scraping step:
[0052] After the tin pump 3 is fed to the second chamber 12, the scraping device 5 scraped the tin residue above the ultrasonic vibration device 4 prior to opening the open door 6.
[0053] Simply, through this tin plating method, the oxide film in the surface of the terminal 7 surface of the element can be removed by ultrasonic techniques without the use of the flux technology, and the rapid upper tin is achieved, and the environmentally friendly problem of the electroplating technology of the transmission is achieved. .
[0054] By further use the tin oxidation of the tin liquid surface in the second chamber 12 to remove tin oxidation of the tin liquid level in the second chamber 12, the tin oxide residue can be avoided.
[0055] Please combine figure 2 and image 3 More specifically, the complete flow of the tin plating method supporting the ultrasonic tin plating device of the present embodiment is as follows: the tin pump 3 works and drum tin, pump the tin liquid to the second chamber 12 to the liquid level high Board 2; scratching device 5 or before and after moving (in figure 2 For example, the scraping device 5 is from figure 2 On the right side of the perspective, the scraper is moved to the left side, thereby pushing the tin oxide residue of the tin liquid surface to the left), scraping the tin oxide residue above the ultrasonic vibration device 4 to the first chamber 11; the tin pump 3 stops , The second chamber 12 tin liquid restores the original height under gravity (eg image 3 As shown, the first chamber 11 and the liquid surface of the second chamber 12 are contrary to the surface of the second chamber 12, at this time, the tin solution of the tin liquid of the second chamber 12 is widosus residue; the opening can be opened, and the lifting device 8 drops to the designated Height, to immerse terminal 7 in tin liquid, at this time, the ultrasonic vibration device 4 operates to remove the oxide film of the terminal 7, complete the tin; the lifting device 8 rises, can be opened, and the entire tin plating work is completed.
[0056] When tinning for the terminal 7 of the additional components, the above operation can be repeated to meet the production needs.
[0057] In addition, the present embodiment image 3 The open-enabled door 6 is to move to the left, but may also be set to move to other directions to open the opening.
[0058] In summary, the ultrasonic tin plating device of the present application and the tin plating method can be used for large-scale tin plating, satisfying large-scale production requirements. Since there is an ultrasonic vibration device 4, it is possible to The oxide film on the surface of the terminal 7 is removed, and the environmental issues caused by conventional electroplating technology are solved.
