CN212217369U

CN212217369U - Tin coating nozzle and device

Info

Publication number: CN212217369U
Application number: CN202020692749.8U
Authority: CN
Inventors: 周旋; 王海英; 檀正东; 王海明; 蔡云峰; 朱继元; 罗小军; 尹帮前
Original assignee: Shenzhen Aibeite Electronic Tech Co ltd
Current assignee: Shenzhen Aibeite Electronic Tech Co ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-12-25
Anticipated expiration: 2030-04-29

Abstract

The utility model is suitable for an integrated circuit welding technology field. The utility model discloses a ward off tin nozzle and device, wherein ward off the tin nozzle including the messenger be equipped with the nozzle body of tin outlet, the nozzle body is equipped with the arc inclined plane that makes liquid soldering tin form the tin film from its surperficial tin stream, and the thickness top-down of this tin film thins gradually. Because the outer side surface of the nozzle body is provided with the arc-shaped inclined surface, when the tin output is constant and flows through the nozzle body with the arc-shaped inclined surface, a tin film which becomes thinner gradually from top to bottom is formed. The position that the pin passes through the tin film is confirmed according to the pin is intensive when warding off the tin, can guarantee again through surperficial cambered surface structure and warded off the tin time, and the pin face and the arc inclined plane contact surface of device are less, and simultaneously under the momentum combined action that produces in the tin flow from the top and upward flow for it is difficult to form the continuous tin phenomenon between two pins to weld the in-process at warding off, appears the continuous tin phenomenon when avoiding warding off the welding.

Description

Tin coating nozzle and device

Technical Field

The utility model relates to an integrated circuit welding technology field, in particular to ward off tin nozzle and device.

Background

The pre-soldering is to wet the lead of the component to be soldered or the conductive soldered portion with solder in advance, and is also generally called as tinning, or tinning. The existing tin-coating machine mainly comprises a common tin-coating machine and an ultrasonic tin-coating machine. Because the size and the distribution density of the pins of tin coating are different, the difficulty of the tin coating process is different.

At present, the tin-coating equipment usually adopts a plane water curtain type tin film formed by a nozzle, and the minimum distance of tin coating can only be 0.3 mm, however, the minimum pin distance of pins of a common integrated circuit is 0.2 mm. Meanwhile, along with the development trend of integrated circuits, the integrated circuits have larger and larger functions and limited areas, the pin density of the integrated circuits is larger and larger, and the phenomenon of tin connection between two pins is easily caused by adopting the prior art, so that the short circuit between the pins of the integrated circuits is caused, and therefore, the requirements of gold removal and tin coating of the pins of the prior integrated circuits cannot be met, and the requirements of the development trend of the integrated circuits on tin coating cannot be met.

Disclosure of Invention

The utility model discloses the main technical problem who solves provides a ward off tin nozzle and ward off tin device, wherein should ward off the tin device and avoid warding off the bad that tin appears to the intensive device of pin distribution, and the intensive device of adaptation pin distribution wards off the tin requirement, improves and wards off the tin quality.

In order to solve the problem, the utility model provides a ward off tin nozzle. The tin coating nozzle comprises a nozzle body provided with a tin outlet, and is characterized in that the nozzle body is provided with an arc-shaped inclined plane which enables liquid tin to form a tin welding film from the surface of the nozzle body through tin flow, and the thickness of the tin welding film becomes thinner gradually from top to bottom.

Furthermore, the outer side of the nozzle body is conical by an arc inclined plane, and the tin outlet is positioned at the top of the conical nozzle.

Furthermore, the arc-shaped inclined plane of the nozzle body is at least provided with a flow bending groove which can slow down the flow speed of tin and ensure that the thickness of the tin is uniform.

Further, when the outer side of the nozzle body is conical formed by the arc-shaped inclined plane, the surface baffling groove is annular or arc-shaped.

Further, the flow deflecting groove is parallel to the tin outlet of the nozzle.

The utility model also provides a ward off tin device, this ward off tin device is including ward off the tin nozzle, should ward off the tin nozzle including making the nozzle body that is equipped with out the tin mouth, this nozzle body is equipped with the arc inclined plane that makes liquid soldering tin form the tin film from its surperficial tin flow, and the thickness top-down of this tin film thins gradually.

Further, the tin enameling device further comprises a constant tin feeding mechanism for controlling the tin outlet to have a constant tin outlet, the constant tin feeding mechanism comprises a tin cavity immersed in tin bath tin liquid, one end of the tin cavity is communicated with a conical nozzle, one end of the tin cavity is provided with an impeller driven by a constant closed-loop servo motor, and one end of the tin cavity, which is provided with the impeller, is also provided with a tin inlet communicated with the tin bath.

Furthermore, the tin coating system also comprises an upper tin-assistant device for applying a tin-assistant agent to the tin-coating welding pin.

Furthermore, the tin-coating system also comprises a preheating device for preheating the tin-coating welding pins.

The utility model discloses ward off tin nozzle and ward off tin device, wherein ward off the tin nozzle including the messenger be equipped with the nozzle body of tin outlet, the nozzle body is equipped with the arc inclined plane that makes liquid soldering tin form the tin welding membrane from its surperficial tin stream, and the thickness top-down of this tin welding membrane thins gradually. Because the outer side surface of the nozzle body is provided with the arc-shaped inclined surface, when the tin output is constant and flows through the nozzle body with the arc-shaped inclined surface, a tin film which becomes thinner gradually from top to bottom is formed. The position that the pin passes through the tin film is confirmed according to the pin is intensive when warding off the tin, can guarantee again through surperficial cambered surface structure to ward off the tin when, the pin face and the arc inclined plane contact surface of device are less, and simultaneously under the momentum combined action that produces in tin flows top-down flow for it is difficult to form the continuous tin phenomenon between two pins to ward off the welding in-process, appears the continuous tin phenomenon when avoiding warding off the welding.

Drawings

In order to illustrate more clearly the embodiments of the invention or the solutions of the prior art, reference will now be made briefly to the attached drawings that are needed in the description of the embodiments or the prior art, it being understood that the drawings in the description illustrate only some embodiments of the invention and are therefore not to be considered limiting of its scope, and that, to a person skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural diagram of an embodiment of a tin-coating nozzle.

FIG. 2 is a schematic view of the position relationship between the tin-coating device and the nozzle.

Fig. 3 is a schematic view showing the position of the nozzle when the dense pin device is enameled with tin.

FIG. 4 is a schematic view of the structure of the tin coating device of the present invention.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The following claims are presented in conjunction with the detailed description of the invention and the accompanying drawings, it being understood that the embodiments described are only some embodiments of the invention and not all embodiments. Based on the embodiments of the present invention, those skilled in the art can find out all other embodiments without creative efforts, and all the embodiments also belong to the protection scope of the present invention.

It should be understood that in the description of the present invention, all directional terms such as "upper", "lower", "left", "right", "front", "back", etc. are used only for convenience of description and simplification of the present invention, and are not intended to limit the present invention, since they indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and are not necessarily limited to the present invention. For the purpose of explaining the relative positional relationship of the components, the movement, etc., as shown in the drawings, when the specific attitude is changed, the directional indication may be changed accordingly.

Furthermore, the use of ordinal numbers such as "first", "second", etc., in the present application is for distinguishing purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. The features defining "first" and "second" may be explicit or implicit in relation to at least one of the technical features. In the description of the present invention, "a plurality" means at least two, i.e., two or more, unless expressly defined otherwise; the meaning of "at least one" is one or both.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The utility model relates to a controller, control circuit are the conventional control of technical staff in the field, if the control circuit of controller can realize through the simple programming of technical staff in the field, the providing of power also belongs to the common general knowledge in the field, and the utility model discloses main utility model technical point lies in improving mechanical device, so the utility model discloses the type does not explain specific circuit control relation and circuit connection in detail again.

As shown in fig. 1-4, the present invention provides an embodiment of a tin-coating nozzle.

The tin coating nozzle comprises a nozzle body 1 provided with a tin outlet 11, wherein the nozzle body 1 is provided with an arc inclined surface 10 which enables liquid soldering tin to form a soldering tin film C from the surface of the nozzle body in a tin flow mode, and the thickness of the soldering tin film C becomes thinner gradually from top to bottom.

In this way, the dense pin device B of the present invention refers to a device with dense pins, such as an integrated circuit IC; the dense pins B1 mean that the gap between the pins is small.

Because the outer side surface of the nozzle body 1 is provided with the arc-shaped inclined surface 13, when the tin outlet 11 has constant tin outlet quantity and flows through the nozzle body 1 with the arc-shaped inclined surface 10, a tin film C which becomes thinner gradually from top to bottom is formed. According to the pin intensive condition when warding off the tin, confirm the pin and bore tin through the tin film C position of different thickness, can guarantee again through surperficial arc inclined plane 10 structure when warding off the tin, pin B1 and the arc inclined plane 10 contact surface of intensive pin device B are less, simultaneously because the tin flows from going up from F orientation down from tin outlet 11, it produces certain momentum for at the same time, be difficult to form the continuous tin phenomenon between two pins at the warding off welding in-process, appear the continuous tin phenomenon when avoiding warding off the welding.

The thickness of the arc-shaped inclined surface 10 of the nozzle body 11 and the contact position of the tin film and the soldering tin during tin coating can be determined through limited tests and obtained empirical values according to the tin output and the area flowing through the arc-shaped inclined surface 11.

The nozzle body 1 can adopt a structure that the outer side of the nozzle body 1 is formed into a cone shape by an arc inclined plane 10, and the tin outlet 11 is positioned at the top of the cone-shaped nozzle.

According to the needs, the arc inclined surface 10 of the nozzle body 11 is at least provided with a baffling groove 12, the baffling groove 12 divides the arc inclined surface 10 into two discontinuous first arc inclined surfaces 13 and second arc inclined surfaces 14, and the baffling groove 12 can enable tin flow to get down from the surface of the second arc inclined surfaces 14 along the direction F to have certain resistance, so that the tin flow C speed of the first arc inclined surfaces 13 on the upper portion of the baffling groove 12 is reduced, and the thickness of the tin film C on the surface of the first arc inclined surfaces 13 on the upper portion of the baffling groove 12 tends to be uniform.

The number of the baffle grooves 12 is set according to the requirement, and can be one, two or more, the shape of the baffle groove 12 is the same with the shape of the surface of the nozzle body 1, if the outer surface of the nozzle body 1 is the arc inclined plane 10, the baffle groove 12 is arc, when the nozzle body 11 is conical formed by the arc inclined plane 10, the baffle groove 12 is ring-shaped. The plane of the diversion groove 12 is preferably parallel to the plane of the tin outlet 11, so as to ensure that the thickness of the tin film on the arc-shaped inclined plane 10 on the same circle or arc is the same.

According to the needs, the tin-coating system of the dense pin device C further comprises a constant tin-feeding mechanism for controlling the tin outlet 11 to have a constant tin outlet amount, and the tin amount coming out from the nozzle tin outlet is ensured to be stable, so that the thickness of a tin film distributed at the same position on the arc-shaped inclined plane of the nozzle body is ensured to be relatively stable. The constant solder feeding mechanism comprises a tin cavity 3 immersed in a tin liquid A of a tin bath 2, one end of the tin cavity 3 is communicated with a conical nozzle body 1, one end of the tin cavity 3 is provided with an impeller 4 driven by a servo motor 6 of a constant closed loop, and one end of the tin cavity 3 provided with the impeller 4 is also provided with a tin inlet 5 communicated with the tin bath 3.

According to the requirement, the tin-coating system of the pin-dense device further comprises a preheating device for preheating the pins of the pin-dense device before tin coating. The preheating device has the advantages that the activity of the soldering flux needs to be activated by heating the soldering flux through preheating, so that oxides are better removed, the temperature difference during tin coating is reduced, the deformation possibility is reduced, and the thermal shock during tin coating of the integrated circuit IC is reduced. Preheating device can not the utility model discloses improve the main points, can adopt prior art to realize. And adhering the soldering flux to the pins of the dense pin device through the soldering flux adhering device before preheating according to the requirement, so that subsequent preheating and slush welding are facilitated.

According to the needs, the tin system that wards off still includes to warding off the preheating device that carries out preheating to warding off the welding pin with the last tin agent device that helps the tin agent on the welding pin, wherein go up and help tin agent device and preheating device not the utility model discloses a utility model point, it adopts prior art to realize, no longer gives unnecessary details.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments without departing from the spirit or scope of the present invention.

Claims

1. The tin-coating nozzle comprises a nozzle body provided with a tin outlet, and is characterized in that the nozzle body is provided with an arc-shaped inclined plane which enables liquid tin to form a tin welding film from the surface of the nozzle body through tin flow, and the thickness of the tin welding film becomes thinner gradually from top to bottom.

2. The tin-lined nozzle as claimed in claim 1, wherein: the outer side of the nozzle body is conical formed by an arc inclined plane, and the tin outlet is positioned at the top of the conical nozzle.

3. The tin-lined nozzle as claimed in claim 1, wherein: the arc-shaped inclined plane of the nozzle body is at least provided with a flow bending groove which enables the tin flow speed to slow down the tin thickness to be uniform.

4. The tin-lined nozzle as claimed in claim 3, wherein: when the outer side of the nozzle body is conical formed by the arc-shaped inclined plane, the surface baffling groove is annular or arc-shaped.

5. The tin-lined nozzle as claimed in claim 3, wherein: the baffling groove is parallel to the tin outlet of the nozzle.

6. The utility model provides a ward off tin device, includes and ward off the tin nozzle, should ward off the tin nozzle and include the nozzle body that makes to be equipped with the tin mouth, its characterized in that, this nozzle body is equipped with and makes liquid soldering tin from its surface tin flow form the arc inclined plane of tin film, and the thickness of this tin film is got thinner gradually from top to bottom.

7. The tin enameling device according to claim 6, characterized in that: the outer side of the nozzle body is conical formed by an arc inclined plane, and the tin outlet is positioned at the top of the conical nozzle.

8. The tin enameling device according to claim 7, characterized in that: the arc-shaped inclined plane of the nozzle body is at least provided with a flow bending groove which enables the tin flow speed to slow down the tin thickness to be uniform.

9. The tin enameling device according to claim 6, characterized in that: when the outer side of the nozzle body is conical formed by the arc-shaped inclined plane, the surface baffling groove is annular or arc-shaped.

10. The tin enameling device according to claim 8, characterized in that: the method is characterized in that: the baffling groove is parallel to the tin outlet of the nozzle.

11. The tin enameling apparatus according to any one of claims 6 to 10, characterized in that: still send welding mechanism including the invariant of control tin outlet tin volume invariant, should invariably send welding mechanism to include the tin chamber of submergence in tin bath soldering tin liquid, this tin chamber one end and conical nozzle intercommunication, this tin chamber one end is equipped with the impeller by the servo motor drive of invariable closed loop, the one end that the tin chamber was equipped with the impeller still is equipped with the tin mouth that advances that communicates with the tin bath.