Tin furnace of automatic tin immersion machine

Abstract

The utility model discloses a tin furnace of an automatic tin dipping machine, which belongs to the technical field of tin dipping machines and comprises a furnace body, a partition plate is fixedly mounted in the furnace body, the furnace body is divided into a jet flow area and a backflow area by the partition plate, the height of the partition plate is smaller than that of the edge of the furnace body, and the furnace body is fixedly connected with a suction head and a spray head corresponding to the jet flow area and the backflow area respectively. The suction head and the spray head are connected through a tin liquid pump, a bearing bowl is movably arranged at the position, close to the spray head, of the jet flow area, and the furnace body is provided with a control assembly for driving the bearing bowl to move. According to the tin furnace of the automatic tin immersion machine, the change degree of the liquid level height during pin contact is reduced, and dross of tin liquid in the receiving bowl is reduced, so that the tin immersion quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soldering tin machines, and more specifically, it relates to a tin furnace of an automatic soldering tin machine. Background Art

[0002] The tinning test is a necessary test item for PCB factories after the circuit board is formed. The instrument used for the tinning test is a tin furnace.

[0003] The Chinese utility model patent with the publication number CN206415737U introduces a jet tin furnace, which includes a furnace liner with a furnace cavity inside for containing tin liquid and a cover body for covering the furnace liner. The cover body protrudes towards the furnace cavity and is provided with a gas preheating channel that inserts into the tin liquid to absorb the heat of the tin liquid and preheat the flowing protective gas. One end of the gas preheating channel is connected to a gas source for supplying the protective gas, and the other end is connected to a gas nozzle for spraying the preheated protective gas around the tin liquid nozzle.

[0004] The problem solved in the above solution is that by setting a gas preheating channel on one side of the cover body of the furnace liner, during the actual soldering process, the gas preheating channel is inserted into the tin liquid in the furnace liner, and the high-temperature tin liquid directly preheats the protective gas passing through the gas preheating channel, which can effectively reduce the processing cost, improve the secondary utilization rate of heat, and save energy; and the stable temperature of the tin liquid can also make the temperature of the preheated protective gas approximately the same and stable as the temperature of the tin liquid, which can effectively reduce the impact on the nozzle.

[0005] However, after the tin liquid column is generated by spraying and is above the liquid level, due to the mutual momentum exchange of the dispersed tin liquid, the height of the tin liquid column is unstable, and then the tinning positions of the pins are different, reducing the tinning quality.

[0006] This application provides another technical solution to solve this technical problem. Utility Model Content

[0007] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a tin furnace of an automatic soldering tin machine.

[0008] The above technical purpose of the present utility model is achieved through the following technical solutions:

[0009] A tin furnace of an automatic soldering tin machine, including a furnace body, a partition is fixedly installed inside the furnace body, the furnace body is divided into a jet area and a reflux area by the partition, the height of the partition is less than the height of the furnace body edge, the furnace body is fixedly connected with a suction head and a spray head corresponding to the jet area and the reflux area respectively, the suction head and the spray head are connected by a tin liquid pump, a receiving bowl is movably arranged at a position close to the spray head in the jet area, and the furnace body is provided with a control component for driving the receiving bowl to move.

[0010] The present utility model is further configured such that: there are two nozzles symmetrically arranged with the receiving bowl as the center, and the spraying direction of the nozzles is away from the bottom of the furnace body.

[0011] The present utility model is further configured such that: a plurality of liquid discharge ports are formed at the bottom of the receiving bowl, and a one-way flow assembly for enabling the tin liquid to flow into the receiving bowl unidirectionally through the liquid discharge ports is arranged in the liquid discharge ports.

[0012] The present utility model is further configured such that: the one-way flow assembly includes a stop ring and a stop block. The stop block is located in the liquid discharge port. The cross section of the stop block and the end of the liquid discharge port facing the inside of the receiving bowl is large, and the cross section of its end facing the inside of the receiving bowl is small. The stop ring is fixedly installed at the end of the liquid discharge port facing the inside of the receiving bowl, and the stop block is in contact with the stop ring and the side wall of the liquid discharge port.

[0013] The present utility model is further configured such that: a guiding block is formed on the stop block, and a guiding opening for the guiding block to slide is formed in the stop ring.

[0014] The present utility model is further configured such that: a stop protrusion is formed on the stop block. When the stop protrusion is in contact with the stop ring, a flow gap is formed between the stop block and the stop ring.

[0015] The present utility model is further configured such that: the control assembly includes a cylinder lifting platform fixed outside the furnace body, and the cylinder lifting platform is fixedly connected with the receiving bowl through a bracket.

[0016] The present utility model is further configured such that: a guiding inclined surface is formed on one side of the partition plate away from the bottom of the furnace body.

[0017] In summary, the present utility model has the following beneficial effects:

[0018] The suction head, the nozzle and the tin liquid pump will cause the tin liquid in the spraying area to flow over the partition plate into the reflux area, and cause the tin liquid at the bottom of the reflux area to flow back to the spraying area again. The floating slag flowing into the reflux area will remain floating on the surface of the tin liquid in the reflux area, reducing the floating slag on the surface of the tin liquid in the spraying area, so that there is no need to separately set a slag scraping device.

[0019] When tin dipping is carried out, the rising receiving bowl is used to receive the tin liquid in the spraying area, and the pins are in contact with the tin liquid separated by the receiving bowl, reducing the degree of change in the liquid level height when the pins are in contact. Moreover, the received tin liquid is close to the nozzle, and the flowing tin liquid continuously pushes the floating slag floating on the surface towards the reflux area, which can reduce the floating slag in the tin liquid in the receiving bowl, thereby improving the quality of tin dipping. Description of the Drawings

[0020] Figure 1 is a structural schematic diagram of the present utility model Figure 1 ;

[0021] Figure 2Structural schematic of the present utility model Figure 2 ;

[0022] Figure 3 Structural schematic of the receiving bowl of the present utility model

[0023] In the figure: 1, furnace body; 2, partition board; 3, jet flow area; 4, reflux area; 5, nozzle; 6, suction head; 7, tin liquid pump; 8, receiving bowl; 9, liquid discharge port; 10, stop ring; 11, stop block; 12, guiding port; 13, guiding block; 14, stop convex; 15, cylinder lifting platform Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments

[0025] As Figure 1 and Figure 2 shown, the present application provides a tin furnace for an automatic soldering machine, including a furnace body 1, a partition board 2 is fixedly installed in the furnace body 1, the furnace body 1 is divided into a jet flow area 3 and a reflux area 4 by the partition board 2, the furnace body 1 is fixedly connected with a suction head 6 and a nozzle 5 corresponding to the jet flow area 3 and the reflux area 4 respectively, the suction head 6 is close to the bottom of the furnace body 1, and the suction head 6 and the nozzle 5 are connected by a tin liquid pump 7. When the tin liquid pump 7 works, it will suck the tin liquid at the bottom of the reflux area 4 through the suction head 6, and after pressurization, it will be sprayed into the jet flow area 3 through the nozzle 5. After the tin liquid in the jet flow area 3 increases, it will turn over the partition board 2 and flow into the reflux area 4. Since the dross generated by the tin liquid floats on the surface of the tin liquid, the dross in the jet flow area 3 will turn over the partition board 2 and flow into the reflux area 4, and the position of the suction head 6 is not easy to suck the dross in the reflux area 4. The dross flowing into the reflux area 4 will remain floating on the surface of the tin liquid in the reflux area 4, and finally the dross on the surface of the tin liquid at the jet flow area 3 can be reduced, and the probability of the dross affecting soldering can be reduced. Such a design also enables the soldering machine not to be provided with a slag scraping device separately. Among them, the height of the partition board 2 is less than the height of the edge of the furnace body 1, which can prevent the tin liquid from flowing out of the furnace body 1. A guiding inclined surface is formed on one side of the partition board 2 away from the bottom of the furnace body 1, and the tin liquid can flow smoothly into the reflux area 4 along the guiding inclined surface, avoiding an increase in the degree of contact between the tin liquid and the air and resulting in an increase in the amount of dross generated

[0026] AsFigure 2 and Figure 3 As shown in Figure 3 , a receiving bowl 8 is movably arranged near the position of the spray nozzle 5 in the spray zone 3, and two spray nozzles 5 are symmetrically arranged with the receiving bowl 8 as the center. The spraying direction of the spray nozzles 5 is away from the bottom of the furnace body 1. When the spray nozzles 5 spray tin liquid, the flow rate of the tin liquid at the opening of the receiving bowl 8 will increase, and the flowing tin liquid continuously pushes the dross floating on the surface towards the return zone 4. The furnace body 1 is provided with a control component, and the control component includes a cylinder lifting platform 15 fixed outside the furnace body 1. The cylinder lifting platform 15 is fixedly connected with the receiving bowl 8 through a bracket.

[0027] When performing tin dipping, the receiving bowl 8 will rise under the action of the cylinder lifting platform 15, and the opening of the receiving bowl 8 will be higher than the liquid level of the tin liquid in the spray zone 3. The receiving bowl 8 is filled with tin liquid flush with the opening of the receiving bowl 8. Due to the flow of the tin liquid at the opening of the receiving bowl 8, there is less dross on the surface of the tin liquid in the receiving bowl 8. The pins contact the tin liquid separated by the receiving bowl 8. Due to the separation of the receiving bowl 8, the flow of the tin liquid in the spray zone 3 will not affect the tin liquid in the receiving bowl 8 at this time, which can reduce the degree of change in the liquid level height during pin contact, thereby improving the quality of tin dipping.

[0028] As Figure 2 and Figure 3 shown in Figure 2 and Figure 3 , a plurality of drain ports 9 are opened at the bottom of the receiving bowl 8. A one-way flow component is arranged in the drain port 9. The one-way flow component includes a stop ring 10 and a stopper 11. The stopper 11 is located in the drain port 9. The cross-section of the stopper 11 and the drain port 9 at the end facing the inside of the receiving bowl 8 is large, and the cross-section at the end facing the inside of the receiving bowl 8 is small. The stop ring 10 is fixedly installed at the end of the drain port 9 facing the inside of the receiving bowl 8. The stopper 11 is in contact with the stop ring 10 and the side wall of the drain port 9, so that the stopper 11 cannot directly fall out of the drain port 9, ensuring the position stability between the stopper 11 and the drain port 9. The stopper 11 is formed with a guide block 13, and the stop ring 10 is provided with a guide port 12 for the guide block 13 to slide. The cooperation of the guide block 13 and the guide port 12 can increase the sliding stability of the stopper 11. The stopper 11 is formed with a stop protrusion 14, and the stop protrusion 14 is used to abut against the stop ring 10.

[0029] When the receiving bowl 8 rises under the action of the cylinder lifting platform 15, the stopper 11 will block the drain port 9 due to its own gravity and the gravity of the tin liquid in the receiving bowl 8, so that the tin liquid in the receiving bowl 8 cannot flow out through the drain port 9, ensuring that the liquid level height of the tin liquid in the receiving bowl 8 will not change.

[0030] After the soldering process is completed, the receiving bowl 8 sinks into the molten tin in the jetting area 3 under the action of the cylinder lifting platform 15. At this time, the molten tin in the jetting area 3 impacts the stopper 11, causing the stopper 11 to slide until the stop protrusion 14 abuts against the stop ring 10. At this time, a flow gap is formed between the stopper 11 and the stop ring 10, and the molten tin in the jetting area 3 flows into the receiving bowl 8 through the drain port 9 and the flow gap. This can ensure the flow of the molten tin in the receiving bowl 8, reduce the probability of dross in the receiving bowl 8, and reduce the probability of dross rising with the receiving bowl 8 and participating in the soldering process.

[0031] In summary, the soldering furnace provided in this embodiment reduces the degree of change in the liquid level height during pin contact and reduces the dross in the molten tin in the receiving bowl 8, thereby improving the quality of soldering.

[0032] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A tin furnace of an automatic tinning machine, comprising a furnace body, characterized in that: A partition is fixedly installed in the furnace body, and the furnace body is divided into a jet zone and a reflow zone by the partition. The height of the partition is less than the height of the edge of the furnace body. The furnace body is fixedly connected with a suction head and a nozzle corresponding to the jet zone and the reflow zone respectively. The suction head and the nozzle are connected through a tin liquid pump. A receiving bowl is movably provided near the nozzle in the jet zone, and the furnace body is provided with a control component for driving the receiving bowl to move.

2. The tin furnace of an automatic tinning machine according to claim 1, characterized in that: Two nozzles are symmetrically arranged with the receiving bowl as the center, and the spraying direction of the nozzles is away from the bottom of the furnace body.

3. The tin furnace of an automatic tinning machine according to claim 1, characterized in that: A plurality of drainage ports are provided at the bottom of the receiving bowl, and a one-way flow component is arranged in the drainage ports to allow the tin liquid to flow into the receiving bowl through the drainage ports in a one-way direction.

4. The tin furnace of the automatic tinning machine according to claim 3, characterized in that: The one-way flow component includes a stop ring and a stop block, the stop block is located in the drain port, the stop block and the drain port have a large cross-section at one end facing the receiving bowl, and a small cross-section at the other end facing the receiving bowl, the stop ring is fixedly installed at the end of the drain port facing the receiving bowl, and the stop block abuts against the stop ring and the side wall of the drain port.

5. The tin furnace of the automatic tinning machine according to claim 4, characterized in that: The stop block is formed with a guide block, and the stop ring is provided with a guide opening for the guide block to slide.

6. The tin furnace of the automatic tinning machine according to claim 4, characterized in that: The stop block is formed with a stop convex, and when the stop convex and the stop ring are in contact with each other, a flow gap is formed between the stop block and the stop ring.

7. The tin furnace of an automatic tinning machine according to claim 1, characterized in that: The control component comprises a cylinder lifting platform fixed outside the furnace body, and the cylinder lifting platform is fixedly connected to the receiving bowl through a bracket.

8. The tin furnace of the automatic tinning machine according to claim 1, characterized in that: A guiding slope is formed on one side of the partition away from the bottom of the furnace body.

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