CN101179908A - Inner opening L-shaped stannum port of spilled stannum port - Google Patents
Inner opening L-shaped stannum port of spilled stannum port Download PDFInfo
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- CN101179908A CN101179908A CNA2007101711373A CN200710171137A CN101179908A CN 101179908 A CN101179908 A CN 101179908A CN A2007101711373 A CNA2007101711373 A CN A2007101711373A CN 200710171137 A CN200710171137 A CN 200710171137A CN 101179908 A CN101179908 A CN 101179908A
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- stannum
- tin
- stannum export
- port
- export
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Abstract
The invention relates to a tin furnace part of PCBA board soldering tin, in particular a tin outlet of a tin furnace. Two rectangle ends of the tin outlet are firmly connected with each other into an L-shape. The tin outlet on the lateral side of the tin outlet in L-shape is provided with a tin spill-way which is a rectangle opening with a depth of 2mm to 8mm.The invention has a simple structure and is capable of effectively increasing soldering efficiency and is applicable for large-scale automatic production; furthermore, oxidation layer on molten tin surface layer is effectively prevented from being retained on the surface of the PCBA board, and the quality of soldering spots is ensured.
Description
Technical field
The present invention relates to a kind of tin stove parts of the PCBA of being used for boards solder, especially a kind of stannum export of stannum furnace.
Background technology
Common wave-soldering adopts manual operations usually, and production efficiency is lower, for the comparatively intensive PCBA plate of need pad, this welding manner is more inadequate, in addition, because stannum export too small (generally long 2 millimeters), can bring the obstruction of scruff, thereby cause the large tracts of land of rosin joint to produce stannum export; At the comparatively intensive PCBA plate of pad, the stannum export of employing structure is also arranged, but common stannum export of stannum furnace is flat mouthful design, in order to realize scolding tin operation to the PCBA plate, generally need maintenance distance once between PCBA plate and stannum export, guarantee to make tin liquor can the electric elements on the PCBA plate of top be welded on the one hand from the stannum export ejection, guarantee simultaneously can in time discharge stannum export from the tin liquor of stannum export ejection subsequently, prevent that stannum export pressure is excessive, influence welding quality, but also there is fault of construction in this structure: when tin liquor when stannum export sprays, because the tin liquor of upper space is owing to directly contact the formation oxide layer with air, this part oxide layer at first contacts with the PCBA plate of top along with tin liquor is gushed out from stannum export, in the wings under the frontal impact of tin liquor, make this part oxide layer oppressed on PCBA plate face, be difficult for it being taken away, make oxide layer remain between solder joint and the PCBA plate, have a strong impact on welding quality by the stannum export tin liquor of gushing out subsequently.
Summary of the invention
In order to overcome the deficiency that above-mentioned various scolding tin exists, when especially adopting the intensive PCBA plate of the point-to-point wave-soldering butt welding point of automatic selectivity to weld, inefficiency, be unsuitable for extensive batch machining, and contact easily forms the deficiency of rosin joint, the invention provides a kind of simple in structurely, can effectively improve welding efficiency, guarantee the stannum export of stannum furnace of the quality of welded contact.
The technical solution adopted for the present invention to solve the technical problems is: a kind of excessive inner opening L-shaped stannum port stannum export, be fixedly connected into " L " type by two rectangle stannum export ends, and the stannum export in " L " type stannum export inboard is provided with the Xi Kou that overflows.Described structure is mainly used in and electronic devices and components on the PCBA plate are " L " concentrate distribute, and has other electronic devices and components to exist in the contiguous kettle in the outside of " L " semi-surrounding structure, and inboard no electronic devices and components or from stannum export apart from far away relatively.
For the ease of the processing of the Xi Kou that overflows, guarantee the tin liquor Xi Kou outflow of can overflowing equably simultaneously, further: described excessive Xi Kou is a rectangle gap.
For the degree of depth of the Xi Kou that overflows rationally is set, crossing shallow may rising comes the Xi Kou that overflows excessive tin effect should be arranged, cross and to cause tin liquor before the stannum export of emerging, just to flow out deeply from the Xi Kou that overflows, make the emerge height of stannum export of tin ripple on the low side, influence welding quality, more further: the degree of depth of described excessive Xi Kou is 2～8mm.
The existence of excessive Xi Kou can effectively change the flow direction of tin liquor behind the ejection stannum export.After tin liquor sprays from stannum export, tin liquor can preferentially flow out from the Xi Kou that overflows, so just form certain tin stream that flows to, making the oxide layer of the superiors can directly do not impacted is adsorbed onto on the PCBA plate, even there is the partial oxidation layer to be adsorbed onto on the PCBA plate, can be washed away by the tin liquor that sprays from stannum export subsequently, having guaranteed can residual oxide layer not influence the soldering quality between scolding tin and PCBA plate yet; On the other hand, because surface tension, tin liquor upper surface in the stannum export is spherical shape, make under the not high situation of furnace pressure, may appear at stannum export edge and form rosin joint, influence welding quality, the existence of excessive Xi Kou, change the flow direction of stannum export tin liquor, made tin liquor can maximum possible cover the PCBA plate of stannum export top, guaranteed the adequacy and the fastness of welding.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a stannum export structural representation of the present invention.
Fig. 2 is the placement location schematic diagram of the present invention on the PCBA plate.
1. excessive tin mouth 2.PCBA plate 3. electronic devices and components among the figure
Embodiment
A kind of excessive inner opening L-shaped stannum port stannum export as shown in Figure 1 is fixedly connected into " L " type by two rectangle stannum export ends, and the stannum export in " L " type stannum export inboard is provided with the tin mouth 1 that overflows, and described excessive tin mouth 1 is a rectangle gap, and its degree of depth is 2～8mm.
As shown in Figure 2, stannum export of the present invention is mainly used in electronic devices and components 3 on the PCBA plate 2 is " L " concentrated distribution, and the contiguous stannum export in the outside of " L " semi-surrounding structure has other electronic devices and components 3 to exist, and inboard no electronic devices and components 3 or far away relatively from the stannum export distance.
During use, PCBA plate 2 is placed on the precalculated position of stannum export top, and board plane and stannum export stannum export are maintained a certain distance, generally be controlled at 2～6mm.The shape of stannum export can be determined according to the distribution situation of PCBA plate 2 welding positions.For the welding position is irregular concentrated distribution, can adopt a plurality of rectangle stannum exports to piece together required welding shape.Tin liquor keeps earlier certain liquid level to store in stannum export 1～3 minute, the PCBA plate to be welded 2 of top is carried out preheating, so that preceding operation is removed the oxide layer on the PCBA plate 2 at the scaling powder generation chemical reaction of PCBA plate 2 positions to be welded sprayings.Afterwards, the electronic startup of tin stove, push to stannum export by the tin liquor of exerting pressure the tin furnace interior, the continuous lifting of tin liquor face in the stannum export, and tin liquor ejects the stannum export stannum export the most at last, contacts with the PCBA plate 2 of top and welds, and is guaranteeing that tin liquor and PCBA plate 2 fully weld, unnecessary tin liquor can be discharged from the excessive tin mouth 1 of stannum export, takes away the oxide layer and the impurity of tin liquor top layer.At last, take off PCBA plate 2, finish the welding of stannum export top electronic devices and components 3 on the ground PCBA plate 2 from the stannum export top.
Because adopted stannum export method for designing flexibly, enlarged effective solder side, thereby made speed of welding fast on year-on-year basis more than three times with international " automatic selectivity welding tin stove ".
Because stannum export has adopted excessive tin mouth design, this scheme has just been removed the main scruff of welding quality and the oxide skin on tin liquor surface of influencing before welding, the qualification rate of welding is reached more than 99.9%.
Claims (3)
1. excessive inner opening L-shaped stannum port stannum export is characterized in that: be fixedly connected into " L " type by two rectangle stannum export ends, the stannum export in " L " type stannum export inboard is provided with the Xi Kou (1) that overflows.
2. excessive inner opening L-shaped stannum port stannum export according to claim 1 is characterized in that: described excessive Xi Kou (1) is a rectangle gap.
3. excessive inner opening L-shaped stannum port stannum export according to claim 2 is characterized in that: the degree of depth of described excessive Xi Kou (1) is 2～8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101711373A CN101179908A (en) | 2007-11-28 | 2007-11-28 | Inner opening L-shaped stannum port of spilled stannum port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101711373A CN101179908A (en) | 2007-11-28 | 2007-11-28 | Inner opening L-shaped stannum port of spilled stannum port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101179908A true CN101179908A (en) | 2008-05-14 |
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ID=39405938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101711373A Withdrawn CN101179908A (en) | 2007-11-28 | 2007-11-28 | Inner opening L-shaped stannum port of spilled stannum port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101179908A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714727A (en) * | 2018-05-19 | 2018-10-30 | 东莞市合易自动化科技有限公司 | A kind of device and scaling method of calibration tin wave height |
-
2007
- 2007-11-28 CN CNA2007101711373A patent/CN101179908A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714727A (en) * | 2018-05-19 | 2018-10-30 | 东莞市合易自动化科技有限公司 | A kind of device and scaling method of calibration tin wave height |
| CN108714727B (en) * | 2018-05-19 | 2023-11-10 | 东莞市合易自动化科技有限公司 | Device and method for calibrating tin wave height |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |