Alloy solder heating printing device

Abstract

The application relates to an alloy solder heating printing device. The application relates to the technical field of alloy solder additive manufacturing. The application specifically comprises a material pipe assembly and a heating assembly, the material pipe assembly is loaded with alloy solder, the heating assembly is arranged outside the material pipe assembly and is used for heating the material pipe assembly and controlling the temperature of the material pipe assembly; the bottom of the material pipe assembly is provided with a printing needle, alloy solder in a molten state in the material pipe assembly is extruded from the printing needle for printing, and the top of the material pipe assembly is connected with an external air source and provides power for the extrusion of the alloy solder in the printing head. The bottom of the material pipe assembly is provided with a printing needle, the top of the material pipe assembly is connected with an external air source, the material pipe assembly is made of a high-temperature-resistant material, the material pipe assembly is heated at high temperature by the heating assembly, the alloy solder in the material pipe assembly is kept in a molten state, the external air source provides power, the alloy solder in a molten state is extruded from the printing needle, and direct writing printing of the alloy solder is realized.

Description

Technical Field

[0001] This invention relates to the field of alloy solder additive manufacturing technology, and in particular to a method for heating and stamping alloy solder.

[0002] Printing device. Background Technology

[0003] Alloy solder additive manufacturing is an emerging technology that can be applied to fields such as semiconductor packaging. The heated nozzle used to print alloy solder is a key technology within alloy solder additive manufacturing equipment and is currently one of the main research directions in alloy solder additive manufacturing technology.

[0004] Most heated printheads on the market are used in the dispensing industry, including hot melt dispensing heads, hot melt jet valves, and hot melt screw valves, generally used for hot melt adhesive dispensing. However, for the dispensing industry, since the adhesives used generally have low melting points, the heating printheads used do not require high-temperature heating of the adhesive to complete the extrusion printing. Therefore, the heating temperature of existing heated printheads is limited, making it difficult to adapt to direct-write printing of alloy solders that require high-temperature heating. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing an alloy solder heating and printing device that can heat, control the temperature, and extrude alloy solder, thereby enabling direct writing printing of alloy solder.

[0006] This invention proposes an alloy solder heating and printing device, comprising a feed tube assembly and a heating assembly. The feed tube assembly is loaded with alloy solder, and the heating assembly is located on the outside of the feed tube assembly to heat it and control its temperature. A printing needle is provided at the bottom of the feed tube assembly, and the alloy solder heated to a molten state in the feed tube assembly is extruded from the printing needle for printing. The top of the feed tube assembly is connected to an external air source to provide power for the extrusion of the alloy solder from the printing needle.

[0007] Furthermore, the feed tube assembly includes a central feed tube and a sealing joint. The central feed tube is used to load alloy solder, the printing needle is located at the bottom of the central feed tube, and the sealing joint is located at the top of the central feed tube for connecting to an external air source.

[0008] Furthermore, the heating assembly includes a tube heating sleeve and a heating tube. The heating tube is disposed on the outside of the tube heating sleeve for heating the tube heating sleeve. The tube heating sleeve is disposed on the outside of the tube assembly for transferring heat to the tube assembly.

[0009] Furthermore, the heating assembly also includes a heat insulation shell, which is disposed outside the heating tube and is used to slow down the outward conduction of heat generated by the heating tube.

[0010] Furthermore, the heating assembly also includes a water-cooled cover disposed on the outside of the insulation shell, the water-cooled cover having a cooling water channel inside, used to reduce the thermal interference of the heating assembly to the outside world.

[0011] Furthermore, the heating assembly also includes a needle insulation plate disposed at the bottom of the heating sleeve of the feed tube. The needle insulation plate is disposed on the outside of the printing needle and is used to keep the printing needle warm.

[0012] Furthermore, a V-shaped observation port is formed on one side of the needle insulation plate, which is used to observe the state of the printing needle from the side.

[0013] Furthermore, the heating printing device also includes a connector for detachably connecting the feed tube assembly to the heating assembly.

[0014] Furthermore, the connector includes a tube pressure ring sleeved on the outside of the tube assembly, a clamping member connected to the heating assembly, and a tube pressure plate rotatably connected to the clamping member. When the tube pressure plate rotates around the clamping member, it presses against the tube pressure ring. When the tube pressure plate rotates in the opposite direction around the clamping member, it moves away from the area above the tube pressure ring.

[0015] Furthermore, the heating assembly is also provided with a heat insulation ring, which is located between the feed tube pressure ring and the heating assembly to insulate the feed tube pressure ring from heat.

[0016] Furthermore, the connector also includes a compression spring sleeved on the clamping member, with one end of the compression spring abutting against the clamping member and the other end abutting against the material tube pressure plate.

[0017] Furthermore, the heating printing device also includes a heat-insulating fixing bracket disposed at the bottom of the heating component, the heat-insulating fixing bracket being used to insulate and fix the heating component.

[0018] Furthermore, the heating printing device also includes a venting assembly for supplying protective gas to the printing needle.

[0019] Furthermore, the ventilation assembly includes a preheating coil disposed in the heating sleeve of the feed tube, and a protective air passage formed in the heating sleeve of the feed tube and the needle insulation plate. The preheating coil is used to deliver protective gas, and the protective air passage is connected to one side of the printing needle.

[0020] The alloy solder heating printing device proposed in this invention has the following beneficial effects:

[0021] (1) The bottom of the material tube assembly of this heating printing device is equipped with a printing needle, and the top is connected to an external air source. The material tube assembly is made of high temperature resistant material. The heating assembly heats the material tube assembly at high temperature, so that the alloy solder in the material tube assembly remains in a molten state, thereby providing an external air source to provide power to drive the molten alloy solder to be squeezed out from the printing needle, thereby realizing direct writing printing of alloy solder.

[0022] (2) The feed tube assembly of this heating printing device includes a central feed tube and a sealing joint. The central feed tube is used to load alloy solder. The sealing joint is located at the top of the central feed tube and is connected to an external air source. The printing needle is located at the bottom of the central feed tube, thereby ensuring the sealing of the connection between the central feed tube and the external air source. Then, the external air source provides power to better drive the molten alloy solder in the feed tube assembly to be squeezed out from the micro-hole of the printing needle, so as to realize the direct writing printing of alloy solder.

[0023] (3) This heating printing device sets a heating sleeve between the central material tube and the heating tube, so that the heating tube indirectly heats the central material tube instead of directly heating the central material tube. This is because the heat generated by the heating tube is conducted to the central material tube through the heating sleeve, which makes the heating of the central material tube more stable and uniform. This allows for stable and uniform heating of the alloy solder in the central material tube, which helps to keep the alloy solder in a molten state and facilitates direct writing printing of the alloy solder.

[0024] (4) The heating component of this heating printing device also includes a heat insulation shell. The heat insulation shell is set on the outside of the heating tube. The heat insulation shell can slow down the heat generated by the heating tube to conduct outward. It can not only reduce the heat loss generated by the heating tube and ensure the temperature control accuracy of the alloy solder, but also insulate the heating tube and reduce the workload of the water cooling cover.

[0025] (5) The heating component of this heating printing device also includes a water cooling cover. The water cooling cover is located on the outside of the heat insulation shell. A cooling water channel is provided in the water cooling cover. By passing constant temperature cooling water into the cooling water channel, the heating tube is further insulated, reducing the heat generated by the heating tube from the outside thermal interference, preventing damage to other external components, and preventing staff from accidentally touching the heating tube and causing a safety accident.

[0026] (6) The heating printing device has a needle insulation plate at the bottom of the heating sleeve of the material tube. After the heating sleeve of the material tube is heated, the heat is conducted to the needle insulation plate, so that the needle insulation plate has a certain temperature. The needle insulation plate surrounds the outside of the output end of the printing needle, and the output end of the printing needle is insulated, which slows down the temperature loss of the output end of the printing needle, thereby ensuring the smooth direct writing printing of alloy solder.

[0027] (7) The heating printing device of this heating printing device also includes a ventilation component, which delivers protective gas to the output end of the printing needle through the ventilation component. The protective gas protects the alloy solder at the output end of the printing needle, preventing the alloy solder from being oxidized, thereby ensuring the smooth direct writing printing of the alloy solder.

[0028] (8) The ventilation components of this heating printing device include a preheating coil and a protective gas path. The preheating coil is installed in the heating sleeve of the feed tube and is used to supply protective gas. The protective gas path is formed in the heating sleeve of the feed tube and the heat preservation plate of the needle and is connected to one side of the printing needle. This allows the protective gas supplied by the preheating coil to be delivered to the output end of the printing needle through the protective gas path, so that the protective gas protects the alloy solder at the output end of the printing needle and avoids the temperature of the output end of the printing needle from being affected by the temperature of the protective gas, thereby further ensuring the smooth direct writing printing of the alloy solder. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements.

[0030] Figure 1 This is a schematic diagram of the structure of an alloy solder heating and printing device according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the top structure of an alloy solder heating and printing device according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the bottom structure of an alloy solder heating and printing device according to an embodiment of the present invention;

[0033] Figure 4 for Figure 2 Schematic diagram of the cross section at point AA;

[0034] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0035] Figure 6 for Figure 3 Schematic diagram of the cross section at point BB;

[0036] Figure 7 for Figure 6 Enlarged diagram of point D in the middle.

[0037] In the diagram: 1. Feed tube assembly; 11. Central feed tube; 12. Sealing joint; 13. Printing needle; 2. Heating assembly; 21. Feed tube heating sleeve; 211. Upper limit protrusion; 22. Heating element; 23. Insulation shell; 24. Water cooling cover; 25. Needle insulation plate; 251. V-shaped observation port; 26. Heat insulation ring; 3. Connector; 31. Feed tube pressure ring; 32. Clamping component; 33. Feed tube pressure plate; 34. Compression spring; 4. Heat insulation fixing bracket; 41. Guide protrusion; 5. Preheating coil; 6. Protective air passage; 7. Washer; 8. Bolt. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1 to 7 An alloy solder heating and printing device according to an embodiment of the present invention includes a feed tube assembly 1 and a heating assembly 2. The feed tube assembly 1 is loaded with alloy solder, and the heating assembly 2 is disposed on the outside of the feed tube assembly 1 to heat it and control the temperature of the feed tube assembly 1. A printing needle 13 is provided at the bottom of the feed tube assembly 1. The alloy solder heated to a molten state in the feed tube assembly 1 is extruded for printing. The top of the feed tube assembly 1 is connected to an external air source to provide power for the extrusion of the alloy solder at the printing needle 13.

[0040] In this application, the heating printing apparatus includes a feed tube assembly 1 and a heating assembly 2, wherein the feed tube assembly 1 is used to load alloy solder, and the heating assembly 2 is disposed on the outside of the feed tube assembly 1. Since the alloy solder has a high melting temperature, it is foreseeable that in this application, the feed tube assembly 1 is made of a high-temperature resistant material, thereby enabling the heating and temperature control of the feed tube assembly 1 by the heating assembly 2, thus achieving heating and temperature control of the alloy solder within the feed tube assembly 1 and keeping the alloy solder in a molten state.

[0041] In this application, the bottom of the feed tube assembly 1 is provided with a printing needle 13, and the printing needle 13 is provided with micro-holes, so that the molten alloy solder in the feed tube assembly 1 can be squeezed out through the micro-holes in the printing needle 13; the top of the feed tube assembly 1 is connected to an external air source, and the external air source provides power to drive the molten alloy solder in the feed tube assembly 1 to be squeezed out from the micro-holes in the printing needle 13, thereby completing the direct writing printing of alloy solder.

[0042] Specifically, in actual implementation, the feed tube assembly 1 can be made of stainless steel; the printing needle 13 can be made of ceramic or stainless steel, so that the feed tube assembly 1 and the printing needle 13 can withstand the high temperature applied by the heating assembly 2, thereby keeping the alloy solder in the feed tube assembly 1 and the printing needle 13 in a molten state, ensuring that the alloy solder can be smoothly extruded from the micropores of the printing needle 13, and realizing direct writing printing of alloy solder.

[0043] In practical applications, this heating printing device, through direct-write printing of alloy solder, can be used in semiconductor packaging. Specifically, in the semiconductor packaging process, solder is typically used to weld the pins of components to the circuit board to achieve circuit encapsulation. The heating printing device of this application can extrude alloy solder droplets through the printing needle 13 between the component pins and the circuit board, allowing the extruded alloy solder droplets to solidify and solder the component pins to the circuit board, thereby improving the efficiency of semiconductor packaging.

[0044] In this embodiment, the feed tube assembly 1 includes a central feed tube 11 and a sealing joint 12. The central feed tube 11 is used to load alloy solder, and the sealing joint 12 is located at the top of the central feed tube 11. The sealing joint 12 connects to an external air source, thereby ensuring the airtightness of the connection between the central feed tube 11 and the external air source. Preferably, in this application, the sealing joint 12 is a stainless steel compression fitting to ensure both sealing performance and heat resistance.

[0045] The printing needle 13 is located at the bottom of the central feed tube 11, so that the power is provided by the external air source to better drive the molten alloy solder in the feed tube assembly 1 to be extruded from the micro-hole of the printing needle 13, thereby realizing direct writing printing of alloy solder.

[0046] In this embodiment, the heating assembly 2 includes a tube heating sleeve 21 and a heating tube 22. The tube heating sleeve 21 is disposed on the outside of the central tube 11, and the heating tube 22 is disposed on the outside of the tube heating sleeve 21. Heat is generated by the heating tube 22 to heat the tube heating sleeve 21, and then the heat is conducted to the central tube 11 through the tube heating sleeve 21, thereby achieving high-temperature heating of the central tube 11 and keeping the alloy solder in the central tube 11 in a molten state.

[0047] In this application, the reason for setting a heating sleeve 21 between the central feed tube 11 and the heating tube 22, so that the heating tube 22 indirectly heats the central feed tube 11 instead of directly heating the central feed tube 11, is that the heat generated by the heating tube 22 is conducted to the central feed tube 11 through the heating sleeve 21, which makes the heating of the central feed tube 11 more stable and uniform. This allows for stable and uniform heating of the alloy solder in the central feed tube 11, better maintaining the alloy solder in a molten state, and thus facilitating direct writing printing of the alloy solder.

[0048] It is foreseeable that in this application, the heating tube 22 has a built-in heating element and a temperature measuring element. The heating element generates heat, which is then conducted to the central material tube 11 by the heating sleeve 21, thereby heating the alloy solder in the central material tube 11. The temperature measuring element measures the temperature of the heating tube 22 and feeds back the temperature information to the control system. The control system then controls the start and stop of the heating element to control the temperature of the heating tube 22, and in turn controls the temperature of the alloy solder in the central material tube 11, keeping the alloy solder in the central material tube 11 in a molten state.

[0049] In this embodiment, the heating component 2 also includes a heat insulation shell 23, which is disposed on the outside of the heating tube 22. The heat insulation shell 23 can slow down the heat generated by the heating tube 22 to conduct outward, reduce the heat loss of the heating tube 22, make the heating tube 22 more efficient in heating the alloy solder, and at the same time reduce the influence of the external temperature on the heating component and ensure the temperature control accuracy of the alloy solder.

[0050] Furthermore, in this embodiment, the heating assembly 2 also includes a water-cooled cover 24, which is disposed on the outside of the insulation shell 23. A cooling water channel is provided in the water-cooled cover 24. By circulating constant-temperature cooling water into the cooling water channel, the heating element 22 is insulated, reducing the thermal interference of the heat generated by the heating element 22 to the outside environment. This prevents the temperature of other external components, especially precision transmission parts, from being disturbed, which could lead to decreased precision or abnormal damage. It also prevents personnel from accidentally touching the heating element 22, causing a safety accident.

[0051] It is foreseeable that in this application, the insulation shell 23 can also serve to insulate the heating tube 22. That is, the heating tube 22 is first insulated by the insulation shell 23 located outside the heating tube 22 to reduce the heat transfer of the heating tube 22. Then, the heating tube 22 is further insulated by the water cooling cover 24 located outside the insulation shell 23, thereby reducing the workload of the water cooling cover 24.

[0052] In this embodiment, the heating assembly 2 further includes a needle insulation plate 25, which is disposed at the bottom of the feed tube heating sleeve 21. A through hole is provided in the center of the needle insulation plate 25, and the discharge end of the printing needle 13 passes through the through hole and passes through the needle insulation plate 25, so that the needle insulation plate 25 surrounds the outside of the discharge end of the printing needle 13.

[0053] Since the printing needle 13 is used to extrude the alloy solder in the central feed tube 11 for direct writing printing of the alloy solder, it is foreseeable that the discharge end of the printing needle 13 is in contact with the outside world. That is, in actual use, the discharge end of the printing needle 13 is prone to heat loss, which may cause the alloy solder to fail to maintain a molten state when it is extruded from the discharge end of the printing needle 13, thus causing the direct writing printing of the alloy solder to fail.

[0054] In this application, the needle insulation plate 25 is located at the bottom of the feed tube heating sleeve 21. Therefore, after the feed tube heating sleeve 21 is heated, the heat is conducted to the needle insulation plate 25, so that the needle insulation plate 25 has a certain temperature. Thus, the needle insulation plate 25 surrounds the outside of the output end of the printing needle 13, heats the output end of the printing needle 13, slows down the temperature loss of the output end of the printing needle 13, and ensures the smooth direct writing printing of alloy solder.

[0055] Since the needle insulation plate 25 needs to transfer the temperature of the feed tube heating sleeve 21 to the output end of the printing needle 13, in actual implementation, the needle insulation plate 25 needs to be made of a high-temperature resistant and thermally conductive material. Specifically, the needle insulation plate 25 can be made of materials such as aluminum alloy or copper alloy. Furthermore, an insulation coating can be added to the outer part of the needle insulation plate 25 that is in contact with the air to reduce heat exchange between the needle insulation plate 25 and the outside air.

[0056] As mentioned in the previous embodiments, the output end of the printing needle 13 passes through the needle insulation plate 25 via a through hole, so that the needle insulation plate 25 surrounds the output end of the printing needle 13. Therefore, in this embodiment, a V-shaped observation port 251 is formed on one side of the needle insulation plate 25, through which the state of the printing needle 13 can be observed from the side, further ensuring the smooth direct writing printing of alloy solder.

[0057] In this embodiment, the heating printing device also includes a connector 3, which detachably connects the feed tube assembly 1 and the heating assembly 2, allowing the feed tube assembly 1 to be assembled in the heating assembly 2 and to be separated from the heating assembly 2, thereby facilitating the replacement and maintenance of the feed tube assembly 1 and enhancing the practicality of the device.

[0058] In this embodiment, the connector 3 includes a tube clamping ring 31, a clamping member 32, and a tube clamping plate 33. The tube clamping ring 31 is sleeved on the outside of the tube assembly 1. Specifically, a clamping ring groove can be provided on the outside of the central tube 11, and the tube clamping ring 31 is sleeved in the clamping ring groove, thereby fixing the tube clamping ring 31 on the outside of the central tube 11.

[0059] The clamping component 32 is fixedly connected to the heating assembly 2. Specifically, the clamping component 32 can be a clamping screw. A threaded hole is provided on the top of the water-cooling cover 24. The clamping screw is screwed into the threaded hole to fix the clamping screw to the top of the water-cooling cover 24. The feed tube clamping plate 33 is rotatably connected to the clamping component 32. Specifically, a sleeve hole is provided on the feed tube clamping plate 33. The feed tube clamping plate 33 is sleeved on the clamping component 32 through the sleeve hole, so that the feed tube clamping plate 33 can rotate around the clamping component 32.

[0060] When assembling the tube assembly 1 in the heating assembly 2, the central tube 11 is inserted into the tube heating sleeve 21 of the heating assembly 2. At this time, the top of the tube pressure ring 31 on the outside of the central tube 11 is slightly higher than the top plane of the water cooling cover 24.

[0061] When the tube pressure plate 33 rotates around the clamping member 32 to the area above the tube pressure ring 31, the tube pressure plate 33 presses against the tube pressure ring 31, thereby limiting the tube pressure ring 31 and fixing the central tube 11 in the tube heating sleeve 21, realizing the assembly of the tube assembly 1 in the heating assembly 2; when the tube pressure plate 33 rotates around the clamping member 32 to the area above the tube pressure ring 31, the tube pressure plate 33 no longer limits the tube pressure ring 31, allowing the central tube 11 to be removed from the tube heating sleeve 21, thereby realizing the separation of the tube assembly 1 from the heating assembly 2.

[0062] The connector 3 of this application, through the operation of rotating the tube pressure plate 33 on the clamping member 32, presses the tube pressure plate 33 and the tube pressure ring 31 together, realizing the assembly of the tube assembly 1 in the heating assembly 2. And through the operation of rotating the tube pressure plate 33 in the opposite direction on the clamping member 32, the tube pressure plate 33 moves away from the upper area of ​​the tube pressure ring 31, realizing the separation of the tube assembly 1 from the heating assembly 2. Thus, the detachable connection between the tube assembly 1 and the heating assembly 2 is simple, convenient and easy to implement, further enhancing the practicality of this device.

[0063] Furthermore, in this embodiment, the connector 3 also includes a compression spring 34. When the compression member 32 is screwed onto the top of the water cooling cover 24, the compression spring 34 and the feed tube pressure plate 33 are both sleeved on the exposed part of the compression member 32. One end of the compression spring 34 abuts against the top of the compression member 32 and the other end abuts against the feed tube pressure plate 33, thereby pressing the feed tube pressure plate 33 onto the top of the water cooling cover 24 by the compression spring 34.

[0064] Since the top of the tube clamping ring 31 is slightly higher than the top plane of the water cooling cover 24, when the tube clamping plate 33 rotates around the clamping member 32 to the area above the tube clamping ring 31, it presses against the top of the tube clamping ring 31, thereby limiting the tube clamping plate 33 to the tube clamping ring 31 and fixing the central tube 11 in the tube heating sleeve 21, thus realizing the assembly of the tube assembly 1 in the heating assembly 2.

[0065] When the tube pressure plate 33 rotates around the clamping member 32 to the area above the tube pressure ring 31, the tube pressure plate 33 no longer limits the tube pressure ring 31, so that the central tube 11 can be taken out from the tube heating sleeve 21, realizing the separation of the tube assembly 1 and the heating assembly 2.

[0066] In this embodiment, a heat insulation ring 26 is also provided inside the heating assembly 2, and the heat insulation ring 26 is disposed between the feed tube pressure ring 31 and the heating assembly 2. Specifically, in this application, the tops of the feed tube heating sleeve 21, the heating tube 22 and the heat insulation shell 23 are on the same horizontal plane, and the top plane of the water cooling cover 24 is higher than the top planes of the feed tube heating sleeve 21, the heating tube 22 and the heat insulation shell 23.

[0067] The heat insulation ring 26 is fitted on the outside of the central material tube 11 and is located below the material tube pressure ring 31. When the central material tube 11 is inserted into the material tube heating sleeve 21, the heat insulation ring 26 is pressed against the top plane of the material tube heating sleeve 21, the heating tube 22 and the heat insulation shell 23. The top of the material tube pressure ring 31 is slightly higher than the top plane of the water cooling cover 24.

[0068] As mentioned in the previous embodiments, the insulation shell 23 is disposed on the outside of the heating tube 22, which can insulate the outer periphery of the heating tube 22. In this application, the heat insulation ring 26 is pressed onto the top of the tube heating sleeve 21, the heating tube 22, and the insulation shell 23, which can insulate the top of the tube heating sleeve 21 and the heating tube 22. This not only reduces the heat loss generated by the heating tube 22 and improves the temperature control accuracy of the alloy solder, but also prevents the heat from the tube heating sleeve 21 and the heating tube 22 from being conducted to the tube pressure plate 33 through the tube pressure ring 31, thereby affecting the rotation operation of the tube pressure plate 33.

[0069] In this embodiment, the heating printing device further includes a heat-insulating fixing bracket 4, which is disposed at the bottom of the heating assembly 2. Specifically, the heat-insulating fixing bracket 4 is fixed to the bottom outer side of the heating sleeve 21 of the feed tube, and is also fixedly connected to the bottom of the water-cooling cover 24, thereby fixing the heating assembly 2 as a whole through the heat-insulating fixing bracket 4.

[0070] In this application, the heat insulation bracket 4 is fixed to the bottom outer side of the heating sleeve 21 of the material tube and is also fixedly connected to the bottom of the water cooling cover 24. The heat insulation bracket 4 can also insulate the bottom of the heating sleeve 21 of the material tube and the heating tube 22, thereby further reducing heat loss, improving the temperature control accuracy of the alloy solder, preventing other external components from contacting the heating tube 22 and causing damage, and preventing workers from accidentally touching the heating tube 22 and causing safety accidents.

[0071] Specifically, in this application, an upper limit protrusion 211 can be provided on the outer periphery of the heating sleeve 21 of the material tube. The heat insulation fixing bracket 4 is inserted into the bottom of the upper limit protrusion 211, thereby limiting the top of the heat insulation fixing bracket 4 through the upper limit protrusion 211. The bottom of the heating sleeve 21 of the material tube is provided with a connecting plane, which is on the same horizontal plane as the bottom of the heat insulation fixing bracket 4 and is provided with a threaded hole. A washer 7 is provided on the connecting plane and the bottom of the heat insulation fixing bracket 4. After one end of the bolt 8 passes through the washer 7, it is screwed into the threaded hole on the connecting plane, so that the bolt 8 fixes the washer 7 to the bottom of the connecting plane and the heat insulation fixing bracket 4, thereby limiting the bottom of the heat insulation fixing bracket 4 through the washer 7, and realizing the fixing of the heat insulation fixing bracket 4 on the outside of the bottom of the heating sleeve 21 of the material tube.

[0072] Furthermore, in this application, the heat insulation fixing bracket 4 and the heating sleeve 21 of the material tube can be connected by point contact, thereby reducing the contact area between the heat insulation fixing bracket 4 and the heating sleeve 21 of the material tube, reducing the heat conduction between the two ends, improving the heat insulation effect of the heat insulation fixing bracket 4 on the heating component 2, reducing heat loss, and improving the temperature control accuracy of the alloy solder.

[0073] Specifically, the cross-sectional diameter of the inner ring of the heat insulation fixing bracket 4 can be slightly larger than the cross-sectional diameter of the outer periphery of the heating sleeve 21 of the tube, so that the cross-sectional area of ​​the gasket 7 extends from the connecting plane to the bottom of the heat insulation fixing bracket 4. Thus, the top of the heat insulation fixing bracket 4 is limited by the upper limit protrusion 211 on the outer periphery of the heating sleeve 21 of the tube, and the bottom of the heat insulation fixing bracket 4 is limited by the gasket 7. This not only achieves the fixing of the heat insulation fixing bracket 4 on the outer side of the bottom of the heating sleeve 21 of the tube, but also reduces the contact area between the heat insulation fixing bracket 4 and the heating sleeve 21 of the tube.

[0074] Furthermore, in this application, at least two guide protrusions 41 can be provided on the inner wall of the heat insulation fixing bracket 4. Since the cross-sectional diameter of the inner ring of the heat insulation fixing bracket 4 is slightly larger than the cross-sectional diameter of the outer periphery of the heating sleeve 21, when the heat insulation fixing bracket 4 is sleeved on the bottom outer side of the heating sleeve 21, the tips of at least two guide protrusions 41 can contact the outer wall of the heating sleeve 21 to ensure the concentricity of the heat insulation fixing bracket 4 and the heating sleeve 21. This ensures the installation accuracy of the heat insulation fixing bracket 4 on the bottom outer side of the heating sleeve 21 while reducing the contact area between the inner wall of the heat insulation fixing bracket 4 and the outer wall of the heating sleeve 21.

[0075] Since alloy solder is easily oxidized when in contact with air, it affects the chemical and physical properties of the alloy solder. Therefore, in this embodiment, the heating printing device also includes a ventilation component, which supplies protective gas to the output end of the printing needle 13. The protective gas protects the alloy solder at the output end of the printing needle 13, preventing the alloy solder from being oxidized, thereby ensuring the smooth direct writing printing of the alloy solder.

[0076] Specifically, in actual implementation, the protective gas introduced into the ventilation component can be an inert gas composed of at least one of argon and nitrogen.

[0077] Furthermore, in this embodiment, the ventilation assembly includes a preheating coil 5 and a protective gas path 6. The preheating coil 5 is disposed in the feed tube heating jacket 21 and is used to supply protective gas. The protective gas path 6 is formed in the feed tube heating jacket 21 and the needle insulation plate 25 and is connected to one side of the printing needle 13, so that the protective gas supplied by the preheating coil 5 can be delivered to the discharge end of the printing needle 13 through the protective gas path 6, so that the protective gas protects the alloy solder at the discharge end of the printing needle 13.

[0078] Specifically, in this application, the outer periphery of the heating sleeve 21 of the feed tube is formed with an annular groove, and the preheating coil 5 is tightly wound in the annular groove on the outer periphery of the heating sleeve 21 of the feed tube, thereby heating the protective gas introduced into the preheating coil 5 through the heating sleeve 21 of the feed tube.

[0079] The protective air passage 6 includes a first passage formed in the heating jacket 21 of the feed tube and a second passage formed in the needle insulation plate 25. The first passage extends vertically and its top is connected to the preheating coil 5 and its bottom is connected to the second passage. The second passage extends horizontally and its end away from the first passage is on one side of the printing needle 13 and is connected to the internal space of the printing needle 13.

[0080] Therefore, the protective gas introduced into the preheating coil 5, after being heated by the heating sleeve 21 of the feed tube, flows sequentially through the first passage and the second passage and is delivered to the internal space of the output end of the printing needle 13. This allows the protective gas to protect the alloy solder at the output end of the printing needle 13 and prevents the temperature of the output end of the printing needle 13 from being affected by the temperature of the protective gas, thereby ensuring the smooth direct writing printing of the alloy solder.

[0081] Since the heating jacket 21 is used to heat the alloy solder at high temperatures, in actual implementation, the preheating coil 5, which transfers heat through the heating jacket 21, is also made of a high-temperature resistant material. Specifically, the preheating coil 5 can be a capillary tube made of stainless steel.

[0082] The above-described contents can be implemented individually or in various combinations, and these variations are all within the protection scope of this invention.

[0083] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An alloy solder heating and printing device, characterized in that: The assembly includes a feed tube assembly (1) and a heating assembly (2). The feed tube assembly (1) is loaded with alloy solder. The heating assembly (2) is located on the outside of the feed tube assembly (1) to heat it and control the temperature of the feed tube assembly (1). A printing needle (13) is provided at the bottom of the feed tube assembly (1). The alloy solder heated to a molten state in the feed tube assembly (1) is extruded from the printing needle (13) for printing. The top of the feed tube assembly (1) is connected to an external air source to provide power for the extrusion of the alloy solder from the printing needle (13). The heating assembly (2) includes a tube heating sleeve (21) and a heating tube (22). The heating tube (22) is located on the outside of the tube heating sleeve (21) and is used to heat the tube heating sleeve (21). The tube heating sleeve (21) is located on the outside of the tube assembly (1) and is used to transfer heat to the tube assembly (1). The heating assembly (2) also includes a heat insulation shell (23), which is located outside the heating tube (22) and is used to slow down the outward conduction of heat generated by the heating tube (22). The heating component (2) also includes a water-cooled cover (24) located outside the insulation shell (23), and the water-cooled cover (24) is provided with cooling water channels to reduce the thermal interference of the heating component (2) to the outside world; The heating assembly (2) also includes a needle insulation plate (25) located at the bottom of the heating sleeve (21) of the feed tube. The needle insulation plate (25) is located on the outside of the printing needle (13) and is used to keep the printing needle (13) warm. The heating assembly (2) is also provided with a heat insulation ring (26), which is pressed against the top of the heating sleeve (21), the heating tube (22) and the insulation shell (23) to insulate the top of the heating sleeve (21) and the heating tube (22); The heating printing device also includes a heat-insulating fixing bracket (4) disposed at the bottom of the heating component (2), the heat-insulating fixing bracket (4) being used to insulate and fix the heating component (2); The heating printing device also includes a ventilation assembly for supplying protective gas to the printing needle (13); The ventilation assembly includes a preheating coil (5) disposed in the heating sleeve (21) of the feed tube, and a protective air passage (6) formed in the heating sleeve (21) of the feed tube and the needle insulation plate (25). The preheating coil (5) is used to heat the protective gas, and the protective air passage (6) is connected to one side of the printing needle (13).

2. The alloy solder heating and printing device as described in claim 1, characterized in that: The feed tube assembly (1) includes a central feed tube (11) and a sealing connector (12). The central feed tube (11) is used to load alloy solder. The printing needle (13) is located at the bottom of the central feed tube (11). The sealing connector (12) is located at the top of the central feed tube (11) and is used to connect to an external air source.

3. The alloy solder heating and printing device as described in claim 1, characterized in that: A V-shaped observation port (251) is formed on one side of the needle insulation plate (25), which is used to observe the state of the printing needle (13) from the side.

4. The alloy solder heating and printing device as described in claim 1, characterized in that: The heating printing device further includes a connector (3) for detachably connecting the feed tube assembly (1) to the heating assembly (2).

5. The alloy solder heating and printing device as described in claim 4, characterized in that: The connector (3) includes a tube pressure ring (31) sleeved on the outside of the tube assembly (1), a clamping member (32) connected to the heating assembly (2), and a tube pressure plate (33) rotatably connected to the clamping member (32). When the tube pressure plate (33) rotates around the clamping member (32), it presses against the tube pressure ring (31). When the tube pressure plate (33) rotates in the opposite direction around the clamping member (32), it leaves the area above the tube pressure ring (31).

6. The alloy solder heating and printing device as described in claim 5, characterized in that: The connector (3) also includes a compression spring (34) sleeved on the clamping member (32), one end of the compression spring (34) abutting against the clamping member (32) and the other end abutting against the material tube pressure plate (33).

7. The alloy solder heating and printing device as described in claim 6, characterized in that: The heat insulation ring (26) is disposed between the feed tube pressure ring (31) and the heating assembly (2) to insulate the feed tube pressure ring (31).

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