Heating tin furnace and tin spraying machine

Abstract

The utility model belongs to the technical field of tin soldering, in particular to a heating tin furnace and a tin spraying machine, which comprise a tin furnace main body, a heat conduction block, a liquid inlet pipe and a liquid outlet pipe, the upper side surface of the tin furnace main body is provided with an inner groove for placing tin, the heat conduction block is arranged on the side wall of the tin furnace main body, and a containing space for placing hot kerosene is arranged in the heat conduction block. And the liquid inlet pipe and the liquid outlet pipe are respectively communicated with the accommodating space in the heat conduction block, and are communicated with an external heat medium machine to realize circulation of hot kerosene in the accommodating space. The heating tin furnace has the advantages that the tin furnace body can be heated seamlessly, loss of heat in air is reduced, the heating efficiency is improved, meanwhile, high-temperature grilling of the tin furnace body is reduced, deformation of the side wall of the tin furnace body is reduced, and the service life of the heating tin furnace is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tin soldering, and specifically relates to a heating tin furnace and a tin spraying machine. BACKGROUND

[0002] The tin spraying machine is also called a hot air leveling machine, and its process is a copper surface tin plating and soldering process for surface treatment of a circuit board after manufacturing. The tin spraying machine is widely used in the PCB industry because of its low cost and good solderability. The purpose is to prevent the copper surface of the circuit board from oxidizing and the electronic components from being firmly soldered and not easily peeled off. The tin furnace of the tin spraying machine has always used a heating plate and heating wires to convert electrical energy into heat energy through an electric heating element to heat the tin furnace steel plate, which in turn supplies heat to the solid tin solder in the tin furnace to reach the melting point.

[0003] However, because the heating wires are placed around the tin furnace with a certain gap, only the steel plate can be continuously heated by the heater to supply heat to the tin solder in the tin furnace. There is a certain gap between the heater and the tin furnace steel plate, and a part of the heat is lost in the air during heat transfer. In order to ensure the temperature of the tin furnace, the power of the heater needs to be increased, resulting in high power consumption. At the same time, the heater is subjected to high-temperature roasting of the tin furnace steel plate for a long time, which can accelerate the aging of the tin furnace steel plate, cause corrosion and deformation of the tin furnace steel plate by the flux, and reduce the service life of the tin furnace.

[0004] Therefore, the prior art needs to be improved. INVENTION CONTENTS

[0005] In order to make up for the problems of the prior art, the application provides a heating tin furnace and a tin spraying machine.

[0006] In the first aspect, the heating tin furnace adopts the following technical scheme:

[0007] A heating tin furnace comprises a tin furnace main body, a heat-conducting block, an inlet pipe and an outlet pipe. An inner groove for placing liquid tin is arranged on the upper side of the tin furnace main body. The heat-conducting block is arranged on the side wall of the tin furnace main body. The heat-conducting block comprises an accommodation space for placing hot kerosene. The inlet pipe and the outlet pipe are in communication with the accommodation space in the heat-conducting block. The inlet pipe and the outlet pipe are in communication with an external heat medium machine to realize the circulation of the hot kerosene in the accommodation space.

[0008] Preferably, the heat-conducting block comprises a heat-conducting main body and a cover plate. The heat-conducting main body is arranged on the side wall of the tin furnace main body. A plurality of circulation grooves are arranged on the side of the heat-conducting main body away from the tin furnace main body. Adjacent two circulation grooves are in communication at different ends to make the plurality of circulation grooves communicate. The cover plate is arranged on the heat-conducting main body to block the openings of the plurality of circulation grooves. The inlet pipe and the outlet pipe are in communication with two circulation grooves away from each other.

[0009] Preferably, the heat-conducting block is provided with two groups, and the two groups of heat-conducting blocks are arranged on the opposite two side walls of the tin furnace body.

[0010] Preferably, the heat-conducting block is integrally connected with the tin furnace body.

[0011] In the second aspect, a tin spraying machine adopts the technical scheme as follows:

[0012] A tin spraying machine comprises a rack and a heating tin furnace, and the tin furnace body is arranged on the rack.

[0013] Preferably, a stirring barrel is further arranged on the rack, a stirring member is arranged in the stirring barrel, and the stirring barrel is in communication with the inner groove of the tin furnace body.

[0014] Preferably, a heat-conducting block is further arranged on the outer side wall of the stirring barrel.

[0015] In summary, the present application has at least one of the following beneficial technical effects:

[0016] 1. When the tin in the tin furnace body is heated, the heated hot coal oil is input from the liquid inlet pipe into the containing space in the heat-conducting block, and then is output from the liquid outlet pipe to the heat medium machine for circulation. In the circulation process of the hot coal oil, the hot coal oil transmits heat to the heat-conducting block, and then transmits heat to the tin furnace body through the heat-conducting block, so as to heat the side wall of the tin furnace body, to heat the solid tin into liquid tin and keep it in liquid state. This design can seamlessly heat the tin furnace body, reduce the heat loss in the air, improve the heating efficiency, reduce the high-temperature roasting of the tin furnace body, reduce the deformation of the side wall of the tin furnace body, and prolong the service life of the heating tin furnace.

[0017] 2. The stirring barrel is arranged, and the stirring groove is in communication with the inner groove, so that the liquid tin in the inner groove flows into the stirring groove, the liquid tin is stirred by the stirring member in the stirring groove, the temperature and properties of the liquid tin in the inner side are ensured, the waste oil residue can float out of the liquid tin, the impurities can be easily removed, the components and materials in the tin furnace are kept clean, and the tin components on the PCB board surface are kept free of impurities. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0019] Figure 1 Figure 1 is a schematic diagram of the whole tin spraying machine in the embodiment of the present application;

[0020] Figure 2 Figure 2 is a schematic diagram of the heating tin furnace in the embodiment of the present application;

[0021] Figure 3 Figure 3 is another view of figure 2. Figure 2 Figure 4 is another view of figure 2.

[0022] Figure 1 is a schematic diagram of the whole tin spraying machine in the embodiment of the present application; DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] The embodiment of the present application discloses a heating tin furnace 1. Referring to Figures 1 to 3 The heating tin furnace 1 comprises a tin furnace body 11, a heat conduction block 12, an inlet pipe 13 and an outlet pipe. Specifically, the tin furnace body 11 is in the shape of a cuboid block, an inner groove 111 is formed on the upper side of the tin furnace body 11, the cross section of the inner groove 111 is rectangular as viewed from the groove opening, and the extension direction of the inner groove 111 is along the vertical direction. The inner groove 111 is used for placing tin and heating the solid tin into liquid tin. The heat conduction block 12 is in the shape of a rectangular block, and is arranged on the side wall of the tin furnace body 11. The heat conduction block 12 has an accommodation space inside, and the inlet pipe 13 and the outlet pipe 14 are respectively connected to the accommodation space in the heat conduction block 12 at one end, and are connected to an external heat medium machine at the other end. The heat medium machine is a prior art, which is not described in detail in the present embodiment. The hot kerosene is discharged from the inlet pipe 13 into the accommodation space through the heat medium machine, and is then discharged from the outlet pipe 14 back to the heat medium machine, so as to realize the circulation of the hot kerosene, keep the hot kerosene at a predetermined temperature, and heat the tin furnace. The hot kerosene is circulated in the accommodation space through the external heat medium machine, so as to keep the hot kerosene at a predetermined temperature, heat the tin furnace body 11, and seamlessly transfer the heat from the heat conduction block 12 to the tin furnace body 11, thereby avoiding the loss of heat in the air, improving the heating efficiency, shortening the heating time, reducing the high-temperature roasting of the tin furnace body 11, and reducing the deformation of the side wall of the tin furnace body 11, thereby prolonging the service life of the heating tin furnace 1.

[0025] And the heating mode of the tin furnace body 11 by heat conduction is more stable in temperature than the mode of directly heating the tin furnace body by the heating plate, and there is no obvious temperature drop and excess temperature tin temperature phenomenon, and the thermal efficiency is stable.

[0026] Referring to Figure 2 And Figure 3 The heat conduction block 12 includes a heat conduction body 121 and a cover plate 123. The heat conduction body 121 is in the shape of a cuboid as a whole. The heat conduction body 121 is arranged on the outer side wall of the tin furnace body 11. A circulation groove 122 is formed on the side of the heat conduction body 121 away from the tin furnace body 11. The cross section of the circulation groove 122 is rectangular as viewed from the groove opening. A plurality of circulation grooves 122 are arranged at equal intervals. In this embodiment, the plurality of circulation grooves 122 are arranged along the vertical direction. In other embodiments, the plurality of circulation grooves 122 can be arranged along the horizontal direction. Adjacent two circulation grooves 122 are connected at different ends to form a containing space inside the heat conduction block 12. The liquid inlet pipe 13 and the liquid outlet pipe 14 are respectively connected to the two circulation grooves 122 farthest apart. The lower circulation groove 122 is connected to the liquid inlet pipe 13, and the upper circulation groove 122 is connected to the liquid storage pipe. In other embodiments, the positions of the liquid inlet pipe 13 and the liquid outlet pipe 14 can be interchanged. The cover plate 123 is arranged on the side of the heat conduction body 121 away from the tin furnace body 11. The cover plate 123 is used to block the groove openings of the plurality of circulation grooves 122 to prevent leakage of hot kerosene during circulation in the circulation grooves 122. The cover plate 123 can be connected to the heat conduction body 121 by screws or other means. When the hot kerosene circulates, it uniformly heats the side wall of the tin furnace through the plurality of circulation grooves 122, which can make the temperature of the tin furnace more stable.

[0027] In order to improve the temperature stability of the liquid tin inside the tin furnace, two groups of heat conduction blocks 12 are arranged on the opposite sides of the tin furnace body 11 to ensure that the heating temperatures on both sides of the tin furnace are consistent and the temperature stability of the liquid tin is ensured.

[0028] In order to further improve the heating efficiency, the following arrangements are made. First, the heat conduction block 12 is integrally connected to the side wall of the tin furnace body 11 to reduce the gap between the heat conduction block 12 and the tin furnace body 11 and reduce the loss of heat during transmission to improve the efficiency of heating. Second, two heat conduction blocks 12 are arranged on the same side, and each heat conduction block 12 is connected to a liquid inlet pipe 13 and a liquid outlet pipe 14. This design can reduce the distance traveled by the hot kerosene in the circulation grooves 122 and make the overall temperature more uniform.

[0029] The application also discloses a tin spraying machine 2, referring to Figures 1 to 3The tin spraying machine 2 comprises a rack 21 and a heating tin furnace 1. Specifically, the heating tin furnace 1 is arranged on the rack 21. Solid tin is placed in an inner groove 111 of the heating tin furnace 1 to be melted into liquid tin. A stirring barrel is further arranged on the rack 21. A hole is arranged at the bottom of the stirring barrel and communicates with the inner groove 111. Liquid tin can flow into the stirring barrel through the hole. An internal stirring part, such as a blade or a stirring rod, is arranged in the stirring barrel to stir the liquid tin flowing into the stirring barrel, so that the liquid tin in the inner groove 111 is always kept in a flowing state, thereby keeping the temperature and properties of the liquid tin. Then, waste oil residue can be floated out, the impurities can be conveniently removed, the components in the tin furnace are kept clean, the tin components on the PCP plate surface are kept in an impurity-free state, and a heat-conducting block 12 is further arranged on the side wall of the stirring barrel. The mechanism form of the heat-conducting block 12 is the same as that of the structure on the side wall of the tin furnace main body 11. The liquid tin in the stirring barrel is always kept in a predetermined stable state, thereby avoiding affecting the subsequent tin spraying effect.

[0030] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A heating tin, characterized by: The tin furnace body includes a tin furnace body, a heat-conducting block, a liquid inlet pipe and a liquid outlet pipe, the upper side of the tin furnace body is provided with an inner groove for placing tin, the heat-conducting block is arranged on the side wall of the tin furnace body, the heat-conducting block is internally provided with a containing space for placing hot kerosene, the liquid inlet pipe and the liquid outlet pipe are respectively communicated with the containing space in the heat-conducting block, and the liquid inlet pipe and the liquid outlet pipe are communicated with an external heat medium machine to realize the circulation of the hot kerosene in the containing space.

2. A heating tin according to claim 1, characterized in that: The heat-conducting block includes a heat-conducting body and a cover plate, the heat-conducting body is arranged on the side wall of the tin furnace body, a plurality of circulation grooves are arranged on the side of the heat-conducting body away from the tin furnace body, and the adjacent two circulation grooves are communicated at different ends to communicate the plurality of circulation grooves, and the cover plate is arranged on the heat-conducting body to block the openings of the plurality of circulation grooves.

3. The heating tin according to claim 1, wherein: The heat-conducting block is provided with two groups, and the two groups of heat-conducting blocks are arranged on the opposite two side walls of the tin furnace body.

4. The heating tin according to claim 1, wherein: The heat-conducting block is integrally connected with the tin furnace body.

5. A tin jet machine characterized by: The machine frame includes a machine frame and the heating tin furnace of any one of claims 1-4, and the tin furnace body is arranged on the machine frame.

6. A tin jet according to claim 5, wherein: The machine frame is also provided with a stirring barrel, the stirring barrel is internally provided with a stirring part, and the stirring barrel is communicated with the inner groove of the tin furnace body.

7. A tin jet according to claim 6, wherein: The outer side wall of the stirring barrel is also provided with a heat-conducting block.

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