CN219053170U

CN219053170U - Hot oil spraying tin remover

Info

Publication number: CN219053170U
Application number: CN202222682092.9U
Authority: CN
Inventors: 彭小平
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-05-23
Anticipated expiration: 2032-10-12

Abstract

The utility model relates to an electronic fitting detinning technical field, more specifically say, it relates to a hot oil sprays detinning machine, fix the BGA board on fixture, and place and preheat on heating element, treat the temperature and reach around 240 degrees after, remove the BGA board after heating to the detinning case through fixture, when heating element preheats, heat detinning liquid oil to around 250 degrees in the heating case, treat the BGA board and remove to the detinning case after, the shower head is opened, directly carry out the spraying detinning of detinning liquid oil to the BGA board that has preheated, avoid the difference of BGA board surface local temperature, the detinning efficiency decline that causes, detinning efficiency has been promoted.

Description

Hot oil spraying tin remover

Technical Field

The application relates to the technical field of electronic fitting tin removal, in particular to a hot oil spraying tin remover.

Background

With the progress of integration technology, the improvement of equipment and the use of deep submicron technology in the 90 s, LSI, VLSI, ULSI has continuously increased integration level of a silicon single chip, more strict requirements on integrated circuit packaging, and rapid increase of the number of I/O pins and power consumption. In order to meet the development requirement, a new variety, ball grid array package, called BGA for short, is added on the basis of the original package variety.

In the related BGA tin removal process, the existing BGA tin removal technology mainly comprises two types:

1. after the BGA board is heated to a certain temperature, the tin layer on the surface of the BGA board is scraped so as to achieve the purpose of tin removal, but the tin removal mode has obvious defects, and not only is the assistance of manual work removed, but also the BGA board is very easy to damage because of the scraping strength, and the BGA board with gold points or capacitors on the surface is very difficult to operate next step;

2. the hot tin and hot oil sticking method is to cover the heated sticking sheet with tin removing liquid manually one by one on the BGA board to eliminate the whole tin layer.

Therefore, the patent number 201410729753.6 is an utility model patent of a tin stripping liquid circulation separation tin stripping mud system, and discloses a tin stripping treatment mode for a printed circuit board.

It comprises the following steps: the liquid collecting cylinder is a cavity with one surface open, the bottom surface of the cavity is provided with a guide plate, the upper end of the guide plate is provided with a stirring device, the separating device comprises a first separator and a second separator which are communicated with each other, the first separator and the second separator are both communicated with the cavity, after the liquid medicine containing tin mud in the cavity is separated for the first time by the first separator, one part of the liquid medicine flows back to the cavity, the other part of the liquid medicine flows back to the cavity after being separated for the second time by the second separator, the spraying device is communicated with the cavity, a plurality of first nozzles are arranged on the spraying device, and the first nozzles are positioned at the opening of the cavity. The tin stripping liquid circulating separation tin mud removing system provided by the utility model ensures that the tin mud content in the tin stripping liquid can be kept at a lower concentration, thereby effectively prolonging the service life of the tin stripping liquid and reducing the shutdown maintenance time.

However, the system for circularly separating the tin-removing mud from the tin-removing liquid does not consider the factor of the local temperature difference of the tin-removing surface of the BGA board, so that the tin layer on the BGA board is difficult to completely remove when the tin-removing liquid is sprayed due to different surface temperatures of the BGA board during spraying operation.

Disclosure of Invention

To the not enough of above-mentioned prior art, the purpose of this application provides a hot oil sprays detinning machine, has the inhomogeneous influence of BGA board surface temperature of avoiding, promotes the detinning efficiency of BGA board.

The technical aim of the application is achieved through the following technical scheme: the hot oil spraying tin remover comprises a frame and a workbench arranged on the frame, wherein the workbench is arranged on the frame:

a tin removal tank for spraying tin removal liquid oil on the BGA board;

the heating box is communicated with the tin removal box and used for receiving the tin removal liquid oil flowing out of the tin removal box;

the spray header is communicated with the heating box and sprays the tin-removing liquid oil to the tin-removing box, the heating box heats the tin-removing liquid oil, the tin-removing oil is sprayed by the spray header and then flows back into the heating box after being received by the tin-removing box, and the tin-removing liquid oil is circularly heated;

the working table is provided with a gantry bracket, a heating component for preheating the BGA board and a clamping mechanism for clamping the BGA board to and fro between the heating component and the tin removal box, and the clamping mechanism is arranged on the gantry bracket.

Preferably, the heating assembly comprises a heating table arranged on the workbench, and a heating wire is arranged in the heating table.

Preferably, the clamping mechanism comprises a linear module arranged on the gantry bracket, a sliding block sliding on the linear module, the linear module drives the sliding block to slide, and a fixing assembly for fixing the BGA board is arranged on the sliding block.

Preferably, the fixing component comprises a heat insulation plate connected with the sliding block and a fixing plate connected with the heat insulation plate, wherein a containing groove for containing the BGA plate is formed in the fixing plate, and limiting pins are arranged around the containing groove.

Preferably, a filter box is communicated between the tin removal box and the heating box, a plurality of layers of filter screens are arranged in the filter box, and the filter box is installed on the frame.

Preferably, the heating table is arranged at an inclined angle.

Preferably, the heating box is coated with heat preservation cotton.

In summary, the application has the beneficial effects that: fix the BGA board on fixture to place and preheat on heating element, treat that the temperature reaches around 240 degrees back, remove the BGA board after heating to the detinning case through fixture, when heating element preheats, heat detinning liquid oil to around 250 degrees in the heating case, treat that the BGA board removes to the detinning case after, the shower head opens, directly carries out the spraying detinning of detinning liquid oil to the BGA board that has preheated, avoids the difference of BGA board surface local temperature, and the detinning efficiency that causes descends, has promoted detinning efficiency.

Drawings

FIG. 1 is a schematic overall construction of an embodiment of the present application;

fig. 2 is a schematic view of an internal partial structure of an embodiment of the present application.

Reference numerals: 1. a frame; 11. a work table; 12. a tin removal box; 13. a heating box; 14. a spray header; 15. a gantry bracket; 16. a filter box; 2. a heating table; 3. a linear module; 31. a slide block; 4. a heat insulating plate; 41. a fixing plate; 42. a receiving groove; 43. and (5) limiting the bolt.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The hot oil sprays detinning machine, see fig. 1 and 2, including frame 1 and locate workstation 11 on frame 1, characterized by locates on frame 1:

a tin removal tank 12 for spraying tin removal liquid oil to the BGA board;

a heating tank 13 for heating the solder-removing liquid oil, which is communicated with the solder-removing tank 12 and receives the solder-removing liquid oil flowing out of the solder-removing tank 12;

the spray header 14 is communicated with the heating box 13 and sprays the tin-removing liquid oil to the tin-removing box 12, the heating box 13 heats the tin-removing liquid oil, the tin-removing liquid oil is sprayed by the spray header 14 and then flows back to the heating box 13 after being received by the tin-removing box 12, and the tin-removing liquid oil is circularly heated;

the workbench 11 is provided with a gantry bracket 15, a heating component for preheating the BGA board and a clamping mechanism for clamping the BGA board to and from the heating component and the tin removal box 12, and the clamping mechanism is arranged on the gantry bracket 15.

When this embodiment is implemented, firstly fix the BGA board on fixture to place and preheat on heating element, after the temperature reaches about 240 degrees, remove the BGA board after heating to the detinning case 12 through fixture, when heating element preheats, add hot detinning liquid oil to about 250 degrees in heating case 13, after the BGA board removes to the detinning case 12, spray header 14 opens, directly carries out the spraying detinning of detinning liquid oil to the BGA board that has preheated, avoid the difference of the regional temperature in BGA board surface, the detinning efficiency decline that causes has promoted detinning efficiency.

In order to increase the heating efficiency of the heating box 13, the heating tube disposed inside the heating box 13 in this embodiment is disposed in a U shape.

Specifically, the heating assembly comprises a heating table 2 arranged on the workbench 11, and a heating wire is arranged in the heating table 2. When the BGA board is preheated to a temperature of 240 degrees, the heating table 2 is heated to about 240 degrees by heating the heating wire, and thereby the BGA board placed on the holding mechanism and the holding mechanism on the heating table 2 is heated.

Wherein the heating table 2 is obliquely arranged, and the inclination angle is between 45 degrees and 80 degrees.

Specifically, the fixture includes a linear module 3 disposed on the gantry bracket 15, a slider 31 sliding on the linear module 3, the linear module 3 drives the slider 31 to slide, and a fixing component for fixing the BGA board is disposed on the slider 31.

In this embodiment, the linear module 3 pushes the slider 31, and the fixing assembly with the BGA board fixed thereon is moved back and forth between the heating table 2 and the solder removing box 12 by sliding the slider 31.

Specifically, the fixing assembly includes a heat insulation board 4 connected with the slider 31 and a fixing board 41 connected with the heat insulation board 4, a containing groove 42 for containing the BGA board is provided on the fixing board 41, and a limit latch 43 surrounding the containing groove 42 is provided.

Because of one of the size dimensions of the BGA board, in order to facilitate clamping of the BGA boards of different sizes, the BGA board is placed in the accommodating groove 42, and then the BGA board is fixed by abutting through the limit pins 43, so that the BGA board is fixed on the fixing plate 41.

The heat insulation board 4 is used for isolating the temperature conducted by the fixing board 41, and the heat insulation board 4 is in a U-shaped configuration, so that the length of the heat insulation board 4 is prolonged as much as possible, and a plurality of heat dissipation holes are formed in the heat insulation board 4 for heat dissipation and temperature reduction.

Specifically, a filter box 16 is communicated between the tin removal box 12 and the heating box 13, a plurality of layers of filter screens are arranged in the filter box 16, and the filter box 16 is installed on the frame 1.

In the process of tin removal, a large tin layer or impurities often fall off, so that the heating box 13 is blocked by circulated tin removal hot oil, the filter box 16 is additionally arranged, the filter is carried out through a plurality of layers of filter screens, and after a certain time, the filter screens are only required to be taken out for replacement or cleaning.

Specifically, the heating box 13 is coated with heat insulation cotton. Has the functions of heat insulation and heat preservation.

The above-described embodiments are merely illustrative of the present application and are not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment as necessary without creative contribution, but are protected by patent laws within the scope of the claims of the present application.

Claims

1. The utility model provides a hot oil sprays detinning machine, includes the frame and locates workstation in the frame, characterized by locates in the frame:

a tin removal tank for spraying tin removal liquid oil on the BGA board;

2. The hot oil spray tin remover according to claim 1, characterized by: the heating assembly comprises a heating table arranged on the workbench, and a heating wire is arranged in the heating table.

3. The hot oil spray tin remover according to claim 1, characterized by: the clamping mechanism comprises a linear module arranged on the gantry bracket, a sliding block sliding on the linear module, the linear module drives the sliding block to slide, and a fixing assembly used for fixing the BGA board is arranged on the sliding block.

4. A hot oil spray tin remover according to claim 3, characterized by: the fixing assembly comprises a heat insulation plate connected with the sliding block and a fixing plate connected with the heat insulation plate, wherein a containing groove for containing the BGA plate is formed in the fixing plate, and limiting pins are arranged around the containing groove.

5. The hot oil spray tin remover according to claim 1, characterized by: the tin removal box with the intercommunication has the rose box between the heating cabinet, be provided with a plurality of layers of filter screen in the rose box, the rose box install in the frame.

6. A hot oil spray tin remover according to claim 2, characterized by: the heating table is arranged at an inclined angle.

7. The hot oil spray tin remover according to claim 1, characterized by: the heating box is coated with heat preservation cotton.