A tin-coated mold, a tin-coating furnace, a tin-coating apparatus, and a tin-coating method

Abstract

This invention discloses a tin-coating mold, a tin-coating furnace, a tin-coating apparatus, and a method, relating to the field of solder ribbon production technology. The tin-coating mold includes: a first annular conical component with a first inlet at the bottom and a first outlet at the top, and a first cavity defined therein; a second annular conical component including a first body and a boss extending from the top of the first body towards its axis, the first body being fitted over the first annular conical component, the boss surrounding and forming a second outlet, and the boss being located outside the first outlet; a second cavity is defined between the first and second annular conical components; the size of the second outlet is adapted to the cross-sectional size of the product, and the diameter of the second outlet is smaller than the diameter of the first outlet, so that the second outlet can intercept excess liquid plating material on the surface of the product as it passes through, and the excess liquid plating material flows out through the second cavity. This invention avoids clogging of the mold, especially the mold outlet, by molten solder or solder dust.

Description

Technical Field

[0001] This invention relates to the field of solder strip production technology, and in particular to a tin-coating mold, tin-coating furnace, tin-coating apparatus and method. Background Technology

[0002] Photovoltaic solder ribbons, for example, are typically produced by applying a metal plating, such as tin or tin-lead alloy, to the surface of a strip-shaped substrate primarily made of copper. Current processing techniques mainly fall into two categories: electroplating and hot-dip plating. Hot-dip plating, due to its cost and manufacturing advantages, enjoys a significantly larger market share than electroplating. Within the hot-dip plating process, tin coating is primarily achieved through two methods: air knife application and mold application. With the continuous development of the photovoltaic industry, the air knife-based hot-dip plating process has gradually revealed drawbacks such as difficulty in controlling compressed gas pressure and flow, and inconvenience in position adjustment. Furthermore, as the mainstream solder ribbon form shifts from multi-busbar (MBB) to ultra-fine multi-busbar (SMBB), production speeds will inevitably increase. In this context, continuing to use air knives with increased air pressure for adhesion not only increases the difficulty of process control but also raises safety hazards due to the increased air pressure above the tin surface. Therefore, using a mold for tinning is currently the better tinning method. However, traditional molds also have the problem of tin dust blocking the mold opening during long-term tinning. This problem is only more pronounced when tinning is done at high speed. In addition, the tinning mold may also have poor concentricity when used.

[0003] Therefore, how to provide a new tin-coating mold is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The present invention provides a tin-coating mold, a tin-coating furnace, a tin-coating device and a method, which can prevent the mold, especially the mold outlet, from being blocked by molten tin or tin ash.

[0005] This invention provides the following solution:

[0006] Firstly, a tin-coating mold is provided, comprising:

[0007] The first annular conical member has a first inlet at the bottom, a first outlet at the top, and a first cavity defined therein;

[0008] The second annular conical member includes a first body and a boss extending from the top of the first body toward its axis. The first body is sleeved on the first annular conical member. The bottom of the first body is provided with a second inlet. The boss surrounds and forms a second outlet, and the boss is located outside the first outlet.

[0009] A second cavity is defined between the first annular conical member and the second annular conical member;

[0010] Products with liquid plating coating on their surface enter the first cavity through the first inlet and exit through the second outlet;

[0011] The size of the second outlet is adapted to the cross-sectional size of the product, and the diameter of the second outlet is smaller than that of the first outlet, so that the second outlet can intercept excess liquid plating material on the surface of the product when it passes through, and the excess liquid plating material flows out through the second cavity.

[0012] Optionally, the inclination angle between the inner wall surface of the first annular conical member and the vertical direction is any value between 8° and 38°.

[0013] Optionally, the inner wall of the second annular conical member is recessed inward to form an annular groove corresponding to the position where the boss connects with the first body.

[0014] Optionally, multiple guide grooves extending from the bottom to the top are formed on the inner wall of the first annular conical member.

[0015] Optionally, the number of the guide channels is 6 to 18; and / or,

[0016] The width of each of the aforementioned guide channels is any value between 0.5 and 3 mm; and / or,

[0017] Each of the aforementioned guide channels has the same width; and / or,

[0018] Each of the aforementioned guide channels has a curved line structure; and / or,

[0019] Each of the aforementioned guide channels bends in the same direction.

[0020] Optionally, a horizontal positioning mark is provided on the outer wall surface of the boss.

[0021] Secondly, a tin-coating furnace is provided, including a furnace body and the tin-coating mold.

[0022] Optionally, the tin-coating mold is located at the top of the furnace body and at least partially extends into the furnace body;

[0023] The outer wall surface of the second annular conical component is provided with a vertical positioning mark.

[0024] Thirdly, a tin-coating apparatus is provided, comprising:

[0025] A housing having a tin material cavity defined therein, the tin material cavity being connected to both the first cavity and the second cavity, the housing having an inlet and an outlet, the inlet being used to introduce liquid plating material, and the outlet being used to discharge the liquid plating material;

[0026] A pressure injector is used to continuously introduce the liquid plating material into the tin material cavity;

[0027] A heater, connected to the housing, is used to heat the tin cavity;

[0028] The wire conduit has openings at both ends, with one end placed inside the solder cavity and the other end extending outside the housing. The end of the wire conduit extending out of the housing is used to allow the product to be soldered to be inserted into the solder cavity.

[0029] The tin-coating mold is placed below the tin material cavity, and the tin-coated product extends out from the second outlet.

[0030] The axial direction of both the wire guide and the tin-coating mold extends vertically, while the liquid inlet and the liquid outlet are arranged horizontally along the axial direction.

[0031] Fourthly, a tin-coating method is provided, comprising:

[0032] Liquid plating material is introduced into the tin material cavity using a pressurized method;

[0033] Heating the solder cavity;

[0034] The product to be tinned is inserted into the tin cavity from top to bottom for tinning.

[0035] The tin-coated product extends out through the second outlet of the tin-coating mold.

[0036] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0037] The tin-coating mold provided by this invention is formed by two nested annular conical parts. The first cavity inside the first annular conical part is used for the product to pass through. By setting the first outlet to match the cross-section of the product, excess liquid plating material adhering to the surface of the product can be scraped off. Since the diameter of the second outlet is smaller than that of the first outlet, the second outlet can avoid obstructing the backflow of liquid plating material. Thus, the scraped excess liquid plating material can flow into the second cavity along the inner wall of the second annular conical part without passing through the first cavity, thereby avoiding irregular flow with the liquid plating material in the first cavity, reducing possible disturbances, and preventing the mold, especially the mold outlet, from being blocked by molten tin or tin ash.

[0038] Furthermore, the annular groove allows excess liquid plating material to be drawn out along the second cavity after the product to be tinned passes through the second outlet. The liquid plating material flow in the first and second cavities within the entire mold achieves a good circulation, which ensures continuous flow of liquid plating material at the second outlet and relatively stable temperature at the second outlet, thereby reducing the possibility of tin ash formation.

[0039] Of course, the embodiments of the present invention do not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a three-dimensional structural schematic diagram of a tin-coating mold provided in one embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the main structure of a tin-coating mold provided in one embodiment of the present invention;

[0043] Figure 3 It is along Figure 2 Cross-sectional view of line AA;

[0044] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0045] Figure 5 This is a cross-sectional view of a tin-coating mold provided in one embodiment of the present invention;

[0046] Figure 6 This is a three-dimensional structural schematic diagram of a tin-coating mold provided in another embodiment of the present invention;

[0047] Figure 7 This is a top view of a tin-coating mold provided in one embodiment of the present invention;

[0048] Figure 8 This is a perspective structural schematic diagram of a tin-coating mold provided in one embodiment of the present invention;

[0049] Figure 9 This is a perspective structural schematic diagram of a tin-coating mold provided in another embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the structure of a tin-coating furnace provided in one embodiment of the present invention;

[0051] Figure 11 This is a schematic diagram of the tin-coating apparatus provided in one embodiment of the present invention;

[0052] Figure 12 It is along Figure 11 Cross-sectional view of the middle BB line;

[0053] Figure 13 This is a flowchart of a tin-coating method provided in one embodiment of the present invention. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0055] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this invention are defined based on the orientation or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] The background technology mentions that traditional molds are prone to mold orifice blockage, mainly because traditional molds simply scrape off excess liquid plating during tinning, causing irregular flow of the liquid plating within a single cavity and in the tinning direction. This increases the probability of molten solder or solder dust clogging the mold, and this probability increases with production time and speed. To address this, this application reduces the likelihood of mold orifice blockage by modifying the internal structure of traditional tinning molds, improves product concentricity, and resolves the tinning defects caused by wire vibration due to air knife pressure during high-speed tinning.

[0058] Example 1

[0059] like Figures 1-3 As shown, the tin-coating mold 100 provided in this application generally includes: a first annular conical member 110 and a second annular conical member 120. Those skilled in the art will understand that both the first annular conical member 110 and the second annular conical member 120 can be conical structures with a smaller top and a larger bottom, and can be polygonal cones or conical shapes, preferably conical. The first annular conical member 110 has a first inlet 111 at its bottom and a first outlet 112 at its top, and defines a first cavity 130 within it. The second annular conical member 120 includes a first body and a boss 121 extending from the top of the first body towards its axis. The first body is fitted over the first annular conical member 110, and the bottom of the first body has a second inlet. The boss 121 surrounds and forms a second outlet 122, and the boss 121 is located outside the first outlet 112. That is, the second annular conical member 120 is nested outside the first annular conical member 110. A second cavity 140 is defined between the first annular conical member 110 and the second annular conical member 120. Preferably, the first cavity 130 and the second cavity 140 are not interconnected. A product with liquid plating adhering to its surface enters the first cavity 130 through the first inlet 111 and exits through the second outlet 122. The size of the second outlet 122 is adapted to the cross-sectional size of the product, and the diameter of the second outlet 122 is smaller than the diameter of the first outlet 112, so that the second outlet 122 can intercept excess liquid plating on the product's surface as it passes through, and the excess liquid plating flows out through the second cavity 140.

[0060] It should be noted that the above-mentioned "the size of the second outlet 122 is adapted to the cross-sectional size of the product" can be understood as the shape and structure of the second outlet 122 being adapted to the cross-section of the product. For example, when the cross-section of the product is circular, the shape of the second outlet 122 is also circular. Preferably, the diameter of the second outlet 122 is the same as the cross-sectional size of the product, so that the coating thickness of the product surface treated by the second outlet 122 meets the actual requirements.

[0061] This application does not limit the size of the first inlet 111 and the second inlet. The diameter of the first inlet 111 may be smaller than the diameter of the second inlet, or the diameter of the first inlet 111 may be larger than the diameter of the second inlet. In this case, the first inlet 111 may be required to protrude from the second inlet.

[0062] The aforementioned tin-coating mold 100 is formed by two nested annular conical parts. The first cavity 130 inside the first annular conical part 110 is used for the product to pass through. By setting the first outlet 112 to fit the cross-section of the product, excess liquid plating material adhering to the surface of the product can be scraped off. Since the diameter of the second outlet 122 is smaller than that of the first outlet 112, the second outlet 122 can avoid obstructing the backflow of liquid plating material. Thus, the scraped excess liquid plating material can flow into the second cavity 140 along the inner wall of the second annular conical part 120 without passing through the first cavity 130. This prevents irregular flow with the liquid plating material in the first cavity 130, reduces potential disturbances, and prevents the mold, especially the mold outlet, from being blocked by molten tin or tin ash.

[0063] like Figure 4 As shown in one example of this application, the inclination angle 114 between the inner wall of the first annular conical member 110 and the vertical direction is any value between 8° and 38°. Within this angle range, the liquid plating material in the first cavity 130 can form a swirling flow state. In this state, the liquid plating material will exert a centering force on the product to be tinned (soldering substrate), so that the product to be tinned is always in the center position of the mold during the tinning process, and the resulting product has good concentricity.

[0064] Preferably, in one example of this application, the inner wall of the second annular conical member 120 is recessed inward to form an annular groove 123 corresponding to the position where the boss 121 connects with the first body. In this way, after the product to be tinned passes through the second outlet 122, the excess liquid plating material can be drawn out along the second cavity 140. The liquid plating material flow in the first cavity 130 and the second cavity 140 within the entire mold is well circulated. This ensures that the liquid plating material at the second outlet 122 continues to flow and that the temperature at the second outlet 122 remains relatively stable, thereby reducing the possibility of tin ash formation.

[0065] It should be noted that the size and structure of the second cavity 140 can be designed according to the amount of tin plating and the production speed, so as to ensure that the flow rate generated by excess liquid plating material is met.

[0066] Given that some liquid plating materials have low viscosity in the molten state, the centering force generated by swirling flow cannot achieve the desired purpose. In one example of this application, such as... Figures 5-8As shown, multiple guide grooves 113 extending from the bottom to the top are formed on the inner wall of the first annular conical member 110 to enhance the swirling flow of the liquid plating material. Through the combined effect of the guide grooves 113 and the inclination angle 114 of the inner wall of the first annular conical member 110, the pressure gradient generated by the liquid plating material flowing within the cavity can be better adjusted, thus helping to improve the concentricity of the product.

[0067] The number of the flow guide grooves 113 can be set according to actual needs. For example, the number of flow guide grooves 113 is 6 to 18.

[0068] Furthermore, the width of each of the aforementioned guide grooves 113 is any value between 0.5 and 3 mm, preferably any value between 0.5 and 2 mm, such as 0.5, 1, or 1.5 mm. Due to space limitations, this application will not exhaustively list these values.

[0069] Preferably, each of the guide grooves 113 has the same width. Of course, it is understood that the guide grooves 113 may also have different widths.

[0070] To further enhance the swirling flow state of the liquid plating material, in one example of this application, each of the guide channels 113 is a curved line structure, and the curvature direction of each guide channel 113 may be the same or different.

[0071] Furthermore, the opening of the guide channel 113 can be an arc shape, a polygon shape, or other structures, which can be adjusted according to the actual liquid plating material used.

[0072] To horizontally position the soldering mold 100, in one example of this application, a horizontal positioning mark 124 is provided on the outer wall surface of the boss 121. As an example only, when the soldering mold 100 has a conical structure, the horizontal positioning mark 124 includes four lines or tangents evenly distributed on the top surface of the boss 121, with each line or tangent located on a diameter of the boss 121, so that the intersection of the extensions of the four lines or tangents is the center of the top surface of the boss 121. Two opposing lines or tangents form a group. During horizontal alignment, the soldering mold 100 can be adjusted by observing two groups of lines or tangents sequentially until the product is located at the intersection of the extensions of the four lines or tangents, thereby improving the concentricity of the product.

[0073] Preferably, the tin-coating mold 100 has a conical structure, and the taper of its outer wall can be any value between 15 and 35.

[0074] like Figure 9As shown, in one example of this application, the first annular conical member 110 and the second annular conical member 120 can be connected by connectors 115, for example, they can be connected at the bottom by four connectors 115.

[0075] Example 2

[0076] Corresponding to the aforementioned tin-coating mold 100, this application also provides a tin-coating furnace. For example... Figure 10 As shown, the tin-coating furnace 200 includes a furnace body 210 and a tin-coating mold 100 provided in any of the above examples. Tin coating is performed in the furnace body 210, and in this embodiment, the tin coating is performed using the conventional hot-dip plating method.

[0077] Specifically, the tin-coating mold 100 is located at the top of the furnace body 210 and at least partially extends into the furnace body 210. To vertically position the tin-coating mold 100, in one example of this application, the outer wall surface of the second annular conical member 120 is provided with vertical positioning marks 125. As an example only, the vertical positioning marks 125 are two annular lines provided on the outer wall surface of the second annular conical member 120. When the liquid plating level in the furnace body 210 is between the two annular lines or coincides with one of the annular lines, it indicates that the tin-coating mold 100 is in position in the vertical direction. That is, this application adjusts the vertical position of the tin-coating mold 100 according to the liquid plating level.

[0078] To further improve the swirling flow state of the liquid plating material, in one example of this application, the tin-coating furnace 200 further includes a spiral mechanism disposed within the furnace body 210. The spiral mechanism is used to make the liquid plating material flow in a spiral state, thereby further improving the centering of the product and assisting in improving its concentricity.

[0079] For any content not detailed in this second embodiment, please refer to the first embodiment above, which will not be repeated here.

[0080] Example 3

[0081] Corresponding to the aforementioned tin-coating mold 100, this application also provides a tin-coating apparatus. For example... Figure 11 and Figure 12As shown, the tin-coating apparatus 300 provided in this application generally includes a housing 310, a pressure device, a heater, a wire conduit 320, and a tin-coating mold 100 provided in any of the above examples. The housing 310 defines a tin-plating cavity 330, which communicates with both the first cavity 130 and the second cavity 140. The housing 310 has an inlet 311 and an outlet 312. The inlet 311 is used to introduce liquid plating material, and the outlet 312 is used to discharge the liquid plating material. Here, the liquid plating material can originate from an external device. The pressure device continuously introduces the liquid plating material into the tin-plating cavity 330, and the flow rate of the liquid plating material within the tin-plating cavity 330 can be adjusted by pressure regulation, thereby preventing the liquid plating material from flowing to the second outlet 122. That is, under the action of the pressurizer, the liquid plating material continuously enters the solder cavity 330 from the inlet 311 and continuously flows out from the outlet 312. The heater is connected to the housing 310 and is used to heat the solder cavity 330, so that the temperature of the liquid plating material in the solder cavity 330 is relatively stable, thereby maintaining the flow state. The wire guide 320 is open at both ends, with one end placed inside the solder cavity 330 and the other end extending outside the housing 310, preferably extending outside the top of the housing 310. The product to be tinned enters the solder cavity 330 through the end of the wire guide 320 that extends out of the housing 310. The tinning mold 100 is placed below the solder cavity 330, and the tinned product extends out from the second outlet 122. The axial direction of the wire guide 320 and the tinning mold 100 is both vertical, and the inlet 311 is arranged horizontally along the axial direction.

[0082] Further, in one example of this application, the wire conduit 320 includes a second body 321 and an annular structure 322 located at the bottom of the second body 321. The second body 321 at least partially extends beyond the top of the housing 310. The cross-sectional diameter of the annular structure 322 is larger than that of the second body 321, and the cross-sectional diameter of the second body 321 is slightly larger than that of the product to be tinned. As an example only, the cross-sectional diameter of the annular structure 322 is substantially the same as that of the first inlet 111. A third cavity 340 is formed within the annular structure 322, and the third cavity 340 communicates with the first cavity 130. Preferably, there is a certain gap between the bottom of the annular structure 322 and the second inlet, so that the third cavity 340 communicates with the tin cavity 330, and tinning is performed in the third cavity 340. The flow state of the liquid plating material in the solder cavity 330 can be adjusted by regulating the pressurizer, so that it can overcome gravity and not flow downward to the second outlet 122. Furthermore, adjusting the pressurizer can also allow the liquid plating material flowing into the first cavity 130 and the excess liquid plating material scraped off by the second outlet 122 to flow into the solder cavity 330 through the second cavity 140, thereby preventing the soldering mold 100 from becoming clogged.

[0083] In actual production, after annealing, the product to be tinned enters an inert gas-protected pipe that extends above the wire guide 320. It then passes through a guide roller into the wire guide 320 and extends into the third cavity 340, before exiting through the second outlet 122. When the product to be tinned enters the third cavity 340, the pressure within the tin chamber 330 causes the air column to break and return to the upper layer. Since the product itself is free of air bubbles, when it flows out, it carries a layer of bubble-free, well-concentric liquid film, which cools to form a tin layer.

[0084] Furthermore, compared to traditional processes, this application changes the bottom-up tinning method to a top-down tinning method. During the tinning process, the centering force generated by the pressure and the vortex-like fluid formed by gravity within the tin cavity 330 ensures the alignment and concentricity of the product to be tinned.

[0085] Example 4

[0086] Corresponding to the aforementioned tin-coating apparatus, this application also provides a tin-coating method. For example... Figure 13 As shown, the tin coating method provided in this application generally includes the following steps:

[0087] S10: Liquid plating material is introduced into the tin material cavity using a pressurized method;

[0088] S20: Heating solder chamber;

[0089] S30: Insert the product to be tinned into the tin cavity from top to bottom for tinning;

[0090] S40: The tin-coated product extends out through the second outlet of the tin-coating mold.

[0091] Compared to traditional processes, this application changes the bottom-up soldering method to a top-down method. During the soldering process, the centering force generated by the pressurized conditions and the vortex-like fluid formed by gravity within the solder cavity ensures the alignment and concentricity of the product to be soldered.

[0092] The technical solution provided by this invention has been described in detail above. Specific examples have been used to illustrate the structure and implementation of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A tin-coating mold, characterized in that, include: The first annular conical member has a first inlet at the bottom, a first outlet at the top, and a first cavity defined therein; The second annular conical member includes a first body and a boss extending from the top of the first body toward its axis. The first body is sleeved on the first annular conical member. The bottom of the first body is provided with a second inlet. The boss surrounds and forms a second outlet, and the boss is located outside the first outlet. A second cavity is defined between the first annular conical member and the second annular conical member; Products with liquid plating coating on their surface enter the first cavity through the first inlet and exit through the second outlet; The size of the second outlet is adapted to the cross-sectional size of the product, and the diameter of the second outlet is smaller than that of the first outlet, so that the second outlet can intercept excess liquid plating material on the surface of the product when it passes through, and the excess liquid plating material flows out through the second cavity.

2. The tin-coating mold according to claim 1, characterized in that, The inclination angle between the inner wall surface of the first annular conical member and the vertical direction is any value between 8° and 38°.

3. The tin-coating mold according to claim 1, characterized in that, The inner wall of the second annular conical member is recessed inward to form an annular groove corresponding to the position where the boss connects with the first body.

4. The tin-coating mold according to claim 1, characterized in that, The inner wall of the first annular conical member has multiple guide grooves extending from its bottom to its top.

5. The tin-coating mold according to claim 4, characterized in that, The number of the flow guide channels is 6 to 18; and / or, The width of each of the aforementioned guide channels is any value between 0.5 and 3 mm; and / or, Each of the aforementioned guide channels has the same width; and / or, Each of the aforementioned guide channels has a curved line structure; and / or, Each of the aforementioned guide channels bends in the same direction.

6. The tin-coating mold according to claim 1, characterized in that, A horizontal positioning mark is provided on the outer wall surface of the boss.

7. A tin-coating furnace, characterized in that, It includes the furnace body and the tin-coating mold as described in any one of claims 1 to 6.

8. The tin-coating furnace according to claim 7, characterized in that, The tin-coating mold is located at the top of the furnace body and extends at least partially into the furnace body; The outer wall surface of the second annular conical component is provided with a vertical positioning mark.

9. A tin-coating apparatus, characterized in that, include: A housing having a tin material cavity defined therein, the tin material cavity being connected to both the first cavity and the second cavity, the housing having an inlet and an outlet, the inlet being used to introduce liquid plating material, and the outlet being used to discharge the liquid plating material; A pressure injector is used to continuously introduce the liquid plating material into the tin material cavity; A heater, connected to the housing, is used to heat the tin cavity; The wire conduit has openings at both ends, with one end placed inside the solder cavity and the other end extending outside the housing. The end of the wire conduit extending out of the housing is used to allow the product to be soldered to be inserted into the solder cavity. The tin-coating mold according to any one of claims 1 to 6 is placed below the tin material cavity; The axial direction of both the wire guide and the tin-coating mold extends vertically, while the liquid inlet and the liquid outlet are arranged horizontally along the axial direction.

10. A tin-coating method, characterized in that, include: Liquid plating material is introduced into the tin material cavity using a pressurized method; Heating the solder cavity; The product to be tinned is inserted into the tin cavity from top to bottom for tinning. The tin-coated product extends out through the second outlet of the tin-coating mold as described in any one of claims 1 to 6.

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