Molten tin spraying device

Abstract

The utility model belongs to the technical field of metal processing, and discloses a molten tin spraying device which is used for melting tin paste into tin liquid and spraying tin drops, the molten tin spraying device comprises a feeding mechanism, a first heating piece, a nozzle, a spraying valve, an incubator and a second heating piece, a flow channel is arranged in the feeding mechanism, and a feeding port and a discharging port are formed in the two ends of the flow channel respectively; the first heating piece is arranged in the feeding mechanism and is used for heating the runner; the nozzle is installed on the feeding mechanism, and a spraying hole is formed in the nozzle and communicates with the discharging opening; the injection valve comprises a valve body and a firing pin, the firing pin is arranged at the output end of the valve body, the end, away from the valve body, of the firing pin sequentially penetrates through the runner and the discharging port, the valve body is used for driving the firing pin to move in the direction close to or away from the nozzle, and when the firing pin moves in the direction close to the nozzle, the firing pin can collide with the inner wall of the injection hole; the tin liquid is jetted in the form of tin drops; the incubator covers the periphery of the nozzle, and the second heating piece is arranged in the incubator.

Description

Technical Field

[0001] The utility model relates to the technical field of metal processing, in particular to a molten tin spraying device. Background Art

[0002] 3D printing is a manufacturing method that uses rapid prototyping technology to directly manufacture complex functional parts. It has a positive effect on reducing manufacturing processes, improving production efficiency, and reducing manufacturing costs. Currently, 3D printing technology is also used in solder paste spraying. This is because metallic tin has good conductivity and a low melting point. Using 3D printing technology, solder paste can be evenly applied to the circuit board in the form of an electrical circuit. The mixture in the solder paste is then heated to evaporate and the solder paste is formed into a stable circuit. Tin metal can also be directly molded on small and medium-sized parts. However, because solder paste is in a non-molten state, the degree of refinement of the product when printing with solder paste is low, making it difficult to meet production needs.

[0003] When current tin metal printing devices print molten tin, the nozzles of the tin metal printing devices are easily clogged, and the shapes of the tin droplets are irregular and cannot form round liquid droplets, resulting in poor product quality and not meeting customer needs.

[0004] Therefore, it is urgent to propose a molten tin spraying device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a molten tin injection device that can print molten tin, avoid nozzle clogging, and keep the tin droplets in a round droplet shape, thereby improving product quality and meeting customer needs.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A molten tin spraying device is used to melt solder paste into molten tin and spray out tin droplets, wherein the molten tin spraying device includes:

[0008] A feeding mechanism, wherein a flow channel is provided inside the feeding mechanism, and a feeding port and a discharging port are provided at both ends of the flow channel;

[0009] a first heating element, the first heating element being disposed in the feeding mechanism and configured to heat the flow channel so that the solder paste can become the molten tin after entering the feeding port;

[0010] A nozzle, the nozzle being mounted on the feeding mechanism, the nozzle being provided with a spray hole, the spray hole being in communication with the discharge port;

[0011] An injection valve comprising a valve body and a striker, wherein the striker is disposed at the output end of the valve body, and an end of the striker away from the valve body is sequentially disposed through the flow channel and the discharge port, wherein the valve body is configured to drive the striker to move toward or away from the nozzle. When the striker moves toward the nozzle, the striker can collide with the inner wall of the injection hole to eject the tin liquid in the form of tin droplets.

[0012] A temperature box, wherein the temperature box cover is arranged around the nozzle;

[0013] A second heating element is disposed in the temperature box.

[0014] Furthermore, a portion of the feeding mechanism close to the nozzle is located in the temperature box.

[0015] Furthermore, the valve body is arranged outside the temperature box.

[0016] Furthermore, the distance between the feeding mechanism and the valve body is m, 5 mm≤m≤20 mm.

[0017] Furthermore, the length of the firing pin is n, m+5 mm≤n≤m+10 mm.

[0018] Furthermore, the molten tin injection device further includes a guide member, which is arranged in the discharge port, and the striker is in sliding cooperation with the guide member.

[0019] Furthermore, the diameter of one end of the injection hole connected to the discharge port gradually increases in a direction approaching the discharge port.

[0020] Furthermore, the molten tin injection device further includes a first temperature sensor, which is arranged in the feeding mechanism and is used to detect the temperature of the flow channel.

[0021] Furthermore, the molten tin injection device further includes a second temperature sensor, which is disposed in the temperature box and is used to detect the temperature in the temperature box.

[0022] Furthermore, the incubator is provided with an observation window.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a molten tin injection device for melting solder paste into tin liquid and injecting tin droplets. The molten tin injection device includes a feeding mechanism, a first heating element, a nozzle, an injection valve, a temperature box and a second heating element. A flow channel is provided inside the feeding mechanism, and a feeding port and a discharging port are provided at both ends of the flow channel respectively. The first heating element is arranged in the feeding mechanism and is used to heat the flow channel so that the solder paste can become tin liquid after entering the feeding port. The nozzle is installed on the feeding mechanism, and a spray hole is opened in the nozzle, and the spray hole is connected to the discharging port. The injection valve includes a valve body and a striker, the striker is arranged at the output end of the valve body, and the end of the striker away from the valve body is sequentially penetrated through the flow channel and the discharging port, the valve body is used to drive the striker to move in a direction close to or away from the nozzle. When the striker moves in a direction close to the nozzle, the striker can collide with the inner wall of the injection hole to inject the tin liquid in the form of tin droplets. The temperature box cover is arranged around the nozzle and is used to keep the nozzle and the ejected tin droplets warm. The second heating element is arranged in the temperature box and is used to heat the environment in the temperature box. During production, the flow channel is first heated to a preset temperature and maintained thereat by the first heating element, and the temperature box is heated to a preset temperature and maintained thereat by the second heating element; then, the solder paste enters the flow channel through the feed port, and due to the high temperature in the flow channel, the solder paste melts into liquid tin after entering the feed port; the valve body drives the striker to move toward the nozzle, and the tin liquid in the flow channel is squeezed to the discharge port, and is ejected in the form of tin droplets under the impact of the striker and the nozzle. By arranging the temperature box cover around the nozzle, the nozzle temperature can be maintained, thereby preventing the tin liquid from solidifying and clogging the nozzle, so that the molten tin injection device of this embodiment can continuously print molten tin; and the temperature box can maintain the ambient temperature around the nozzle, so that the ejected tin droplets maintain a rounded droplet shape, so as to achieve the effect of improving product quality and meet customer needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of the molten tin injection device of the present invention;

[0026] Figure 2 This is a partial structural diagram of the molten tin injection device of the present invention;

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0028] In the picture:

[0029] 100, tin drops;

[0030] 1. Feed mechanism; 11. Flow channel; 12. Feed port; 13. Discharge port;

[0031] 2. a first heating element;

[0032] 3. Nozzle; 31. Injection hole;

[0033] 4. Injection valve; 41. Valve body; 42. Strike pin;

[0034] 5. Temperature box; 6. Second heating element; 7. Guide member; 71. Flow channel hole; 8. First temperature sensor; 9. Second temperature sensor. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0036] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0039] like Figures 1 to 3As shown, this embodiment provides a molten tin injection device for melting solder paste into tin liquid and injecting tin droplets 100. The molten tin injection device includes a feeding mechanism 1, a first heating element 2, a nozzle 3, an injection valve 4, a temperature box 5 and a second heating element 6. A flow channel 11 is provided inside the feeding mechanism 1, and a feed port 12 and a discharge port 13 are provided at both ends of the flow channel 11; the first heating element 2 is arranged in the feeding mechanism 1, and is used to heat the flow channel 11 so that the solder paste can become tin liquid after entering the feed port 12; the nozzle 3 is installed on the feeding mechanism 1, and a spray hole 31 is opened in the nozzle 3, and the spray hole 31 is connected to the discharge port 13 ; The injection valve 4 includes a valve body 41 and a striker 42. The striker 42 is arranged at the output end of the valve body 41, and the end of the striker 42 away from the valve body 41 is successively penetrated into the flow channel 11 and the discharge port 13. The valve body 41 is used to drive the striker 42 to move toward or away from the nozzle 3. When the striker 42 moves toward the direction close to the nozzle 3, the striker 42 can collide with the inner wall of the injection hole 31 to eject the tin liquid in the form of tin droplets 100; the temperature box 5 is arranged around the nozzle 3 for keeping the nozzle 3 and the ejected tin droplets 100 warm; the second heating element 6 is arranged in the temperature box 5 for heating the environment in the temperature box 5.

[0040] During production, the flow channel 11 is first heated to a preset temperature and maintained thereat by the first heating element 2, and the temperature box 5 is heated to a preset temperature and maintained thereat by the second heating element 6; then, the solder paste enters the flow channel 11 through the feed port 12. Due to the high temperature in the flow channel 11, the solder paste melts into liquid tin after entering the feed port 12; the valve body 41 drives the striker 42 to move toward the direction close to the nozzle 3, and the tin liquid in the flow channel 11 is squeezed to the discharge port 13, and is ejected in the form of tin droplets 100 under the collision of the striker 42 and the nozzle 3. By covering the temperature box 5 around the nozzle 3, the temperature of the nozzle 3 can be maintained, thereby preventing the tin liquid from solidifying and clogging the nozzle 3, so that the molten tin injection device of this embodiment can continuously print molten tin; and the temperature box 5 can maintain the ambient temperature around the nozzle 3, so that the ejected tin droplets 100 maintain a rounded droplet shape, so as to achieve the effect of improving product quality and meet customer needs.

[0041] The first heating element 2 is a heating rod. The electric heating rod has a fast heating speed, accurate temperature control, is easy to obtain, and has a low cost. Optionally, the first heating element 2 includes but is not limited to a resistance wire or a thermocouple, etc., which are not limited here.

[0042] In this embodiment, the second heating element 6 is a heating lamp that can radiate heat to the entire space within the incubator 5, thereby maintaining the temperature of a larger space within the incubator 5. Optionally, the second heating element 6 includes, but is not limited to, a resistance wire or a thermocouple, etc., which are not limited here.

[0043] It should be noted that the preset temperature in this embodiment is 150° C., which can meet the requirements of melting the solder paste and maintaining the round shape of the solder droplets 100. In other embodiments, the preset temperature value can be adaptively adjusted based on factors such as the composition or composition ratio of the solder paste to melt the solder paste and obtain round solder droplets 100, which is not limited here.

[0044] In addition, in this embodiment, the valve body 41 is a piezoelectric valve, which has the advantages of high sensitivity and fast response. Optionally, the valve body 41 can also be a pneumatic valve, etc., which is not limited here.

[0045] Furthermore, the portion of the feeding mechanism 1 close to the nozzle 3 is located in the temperature box 5 , which is beneficial for further maintaining the temperature of the portion of the flow channel 11 close to the nozzle 3 , so that the temperature of the tin liquid is stable, and the stability of the sprayed tin droplets 100 can be improved.

[0046] like Figure 1 As shown, the valve body 41 is arranged outside the temperature box 5 to prevent the high temperature in the temperature box 5 from affecting the operation of the valve body 41, thereby ensuring the normal operation of the molten tin injection device.

[0047] Similarly, the distance between the feeding mechanism 1 and the valve body 41 is m, where 5 mm ≤ m ≤ 20 mm. This keeps the valve body 41 away from the feeding mechanism 1, preventing heat from the feeding mechanism 1 from being transferred to the valve body 41 and affecting the normal operation of the valve body 41. This also helps maintain the temperature within the feeding mechanism 1. For example, m can be 5 mm, 10 mm, 17 mm, or 20 mm, etc., and is not limited here.

[0048] Furthermore, the length of the striker 42 is n, where m+5 mm ≤ n ≤ m+10 mm. On the one hand, increasing the length of the striker 42 allows the striker 42 to pass through the flow channel 11 and collide with the nozzle 3 to eject the tin droplet 100 while ensuring that the valve body 41 is away from the feed mechanism 1. On the other hand, this prevents the difficulty of guiding the striker 42 due to an excessively long striker 42, helps ensure stable movement of the striker 42 toward or away from the nozzle 3, and prevents the striker 42 from deflecting, twisting, or breaking. For example, n can be m+5, m+8, or m+10, etc., without limitation herein.

[0049] like Figure 2 Combine Figure 3 As shown, the molten tin injection device further includes a guide member 7 disposed within the discharge port 13. The striker 42 slidably engages with the guide member 7, thereby providing guidance for the striker 42 as it moves toward or away from the nozzle 3. This prevents the striker 42 from deflecting, twisting, or breaking during movement, thereby extending the service life of the striker 42 and improving the operational stability of the molten tin injection device. Specifically, the guide member 7 is provided with a guide hole and a flow channel hole 71. The striker 42 slidably engages with the guide hole, and the flow channel hole 71 is used to allow the molten tin to circulate.

[0050] Furthermore, the diameter of one end of the injection hole 31 connected to the discharge port 13 gradually increases in the direction close to the discharge port 13, which can further guide the collision between the striker 42 and the inner wall of the injection hole 31 and help to spray out the tin droplets 100.

[0051] Continue as Figure 1 As shown, in some embodiments, the molten tin injection device also includes a first temperature sensor 8, which is arranged in the feeding mechanism 1 and is used to detect the temperature of the flow channel 11, so as to determine whether the flow channel 11 is at a preset temperature, to prevent the temperature from being too low to affect the formation of the tin droplet 100, or the temperature from being too high to destroy the composition of the tin liquid.

[0052] Optionally, the molten tin injection device also includes a second temperature sensor 9, which is arranged in the temperature box 5 and is used to detect the temperature in the temperature box 5, so as to determine whether the temperature box 5 is at a preset temperature, to prevent the tin droplet 100 from solidifying and deforming due to low temperature, or evaporating due to high temperature.

[0053] In another embodiment, an observation window is provided on the incubator 5 to facilitate the staff to observe the shape of the tin droplet 100 and the printing process of the tin droplet 100 .

[0054] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A molten tin spraying device for melting tin paste into tin liquid and spraying tin droplets (100), characterized in that: The molten tin injection device comprises: A feeding mechanism (1), wherein a flow channel (11) is provided inside the feeding mechanism (1), and a feeding port (12) and a discharging port (13) are respectively provided at both ends of the flow channel (11); a first heating element (2), the first heating element (2) being arranged in the feeding mechanism (1) and being used for heating the flow channel (11) so that the solder paste can become the tin liquid after entering the feeding port (12); A nozzle (3), the nozzle (3) being mounted on the feeding mechanism (1), the nozzle (3) being provided with a spray hole (31), the spray hole (31) being in communication with the discharge port (13); An injection valve (4), the injection valve (4) comprising a valve body (41) and a striker (42), the striker (42) being arranged at the output end of the valve body (41), and the end of the striker (42) away from the valve body (41) being sequentially penetrated through the flow channel (11) and the discharge port (13), the valve body (41) being used to drive the striker (42) to move in a direction approaching or away from the nozzle (3), and when the striker (42) moves in a direction approaching the nozzle (3), the striker (42) can collide with the inner wall of the injection hole (31), so as to eject the tin liquid in the form of the tin droplets (100); A temperature box (5), wherein the temperature box (5) is covered around the nozzle (3); A second heating element (6), the second heating element (6) is arranged in the temperature box (5).

2. The molten tin spraying device according to claim 1, characterized in that The portion of the feeding mechanism (1) close to the nozzle (3) is located in the temperature box (5).

3. The molten tin spraying device according to claim 1, characterized in that The valve body (41) is arranged outside the temperature box (5).

4. The molten tin spraying device according to claim 1, characterized in that The distance between the feeding mechanism (1) and the valve body (41) is m, 5 mm≤m≤20 mm.

5. The molten tin spraying device according to claim 4, characterized in that: The length of the striker (42) is n, m+5 mm≤n≤m+10 mm.

6. The molten tin spraying device according to any one of claims 1 to 5, characterized in that: The molten tin injection device further comprises a guide member (7), the guide member (7) being arranged in the discharge port (13), and the striker (42) being in sliding engagement with the guide member (7).

7. The molten tin spraying device according to any one of claims 1 to 5, characterized in that: The diameter of one end of the injection hole (31) communicating with the discharge port (13) gradually increases in a direction approaching the discharge port (13).

8. The molten tin spraying device according to any one of claims 1 to 5, characterized in that: The molten tin injection device further comprises a first temperature sensor (8), which is arranged in the feeding mechanism (1) and is used to detect the temperature of the flow channel (11).

9. The molten tin spraying device according to any one of claims 1 to 5, characterized in that: The molten tin injection device further comprises a second temperature sensor (9), which is arranged in the temperature box (5) and is used to detect the temperature in the temperature box (5).

10. The molten tin spraying device according to any one of claims 1 to 5, characterized in that: The temperature box (5) is provided with an observation window.

Images