Alloy solder heating and printing device

Abstract

The invention relates to and discloses an alloy solder heating and printing device. Relates to the technical field of alloy solder additive manufacturing. The device specifically comprises a material pipe assembly and a heating assembly, the material pipe assembly loads alloy solder, and the heating assembly is arranged on the outer side of the material pipe assembly and used for heating the material pipe assembly and controlling the temperature of the material pipe assembly; a printing needle head is arranged at the bottom of the material pipe assembly, alloy solder heated to be in a molten state in the material pipe assembly is extruded out of the printing needle head to be printed, the top of the material pipe assembly is connected with an external air source, and power is provided for extrusion of the alloy solder on the printing head. The printing needle head is arranged at the bottom of the material pipe assembly, the top of the material pipe assembly is connected with the external air source, the material pipe assembly is made of the high-temperature-resistant material, high-temperature heating is conducted on the material pipe assembly through the heating assembly, alloy welding flux in the material pipe assembly is kept in a molten state, and therefore power is provided for the external air source; and the alloy solder in the molten state is driven to be extruded out of the printing needle, and then direct writing printing of the alloy solder is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy solder additive manufacturing, in particular to a method for heating and beating alloy solder. Printing device. Background Art

[0002] Alloy solder additive manufacturing is an emerging technology that can be applied to technical fields such as semiconductor packaging. The heating nozzle used to print alloy solder is a key technology in alloy solder additive manufacturing equipment and is also one of the main research directions of alloy solder additive manufacturing technology.

[0003] Common heating nozzles on the market are mostly used in the dispensing industry, including hot melt dispensing heads, hot melt injection valves, hot melt screw valves, etc., which are generally used for hot melt adhesive dispensing. However, for the dispensing industry, since the melting point of the glue used is generally low, the heating nozzles adapted to it do not need to heat the glue at high temperature to complete the extrusion printing of the glue. Therefore, the heating nozzles in the prior art have limited heating temperatures and are difficult to adapt to the direct writing printing of alloy solders that require high temperature heating. Summary of the invention

[0004] The purpose of the present invention is to provide an alloy solder heating printing device to address the deficiencies of the above-mentioned prior art, which can realize heating, temperature control and extrusion of the alloy solder, thereby realizing direct writing printing of the alloy solder.

[0005] The present invention provides an alloy solder heating printing device, comprising a material tube assembly and a heating assembly, wherein the material tube assembly is loaded with alloy solder, and the heating assembly is arranged on the outside of the material tube assembly to heat the alloy solder and control the temperature of the material tube assembly; a printing needle is arranged at the bottom of the material tube assembly, and the alloy solder heated to a molten state in the material tube assembly is extruded from the printing needle for printing, and the top of the material tube assembly is connected to an external gas source to provide power for the extrusion of the alloy solder at the printing needle.

[0006] Furthermore, the material pipe assembly includes a central material pipe and a sealing joint, the central material pipe is used to load alloy solder, the printing needle is arranged at the bottom of the central material pipe, and the sealing joint is arranged at the top of the central material pipe for connecting to an external gas source.

[0007] Furthermore, the heating component includes a material pipe heating sleeve and a heating pipe, wherein the heating pipe is arranged on the outside of the material pipe heating sleeve to heat the material pipe heating sleeve, and the material pipe heating sleeve is arranged on the outside of the material pipe assembly to transfer heat to the material pipe assembly.

[0008] Furthermore, the heating component also includes a heat-insulating shell, which is arranged on the outside of the heating tube and is used to slow down the outward conduction of heat generated by the heating tube.

[0009] Furthermore, the heating component also includes a water-cooling cover arranged on the outside of the insulation shell, and a cooling water channel is provided in the water-cooling cover to reduce the thermal interference of the heating component to the outside world.

[0010] Furthermore, the heating component also includes a needle insulation plate arranged at the bottom of the material tube heating sleeve, and the needle insulation plate is arranged on the outside of the printing needle to keep the printing needle warm.

[0011] Furthermore, a V-shaped observation port is formed on one side of the needle insulation plate, and the V-shaped observation port is used to observe the state of the printing needle from the side.

[0012] Furthermore, the heating printing device also includes a connecting piece, and the connecting piece is used to detachably connect the material tube assembly and the heating assembly.

[0013] Furthermore, the connecting part includes a material tube pressure ring sleeved on the outside of the material tube assembly, a clamping part connected to the heating assembly, and a material tube pressure plate rotatably connected to the clamping part. When the material tube pressure plate rotates around the clamping part, it is crimped with the material tube pressure ring. When the material tube pressure plate rotates in the opposite direction around the clamping part, it leaves the upper area of ​​the material tube pressure ring.

[0014] Furthermore, a heat-insulating ring is provided in the heating component, and the heat-insulating ring is provided between the material tube pressing ring and the heating component to insulate the material tube pressing ring.

[0015] Furthermore, the connecting member also includes a compression spring sleeved on the compression member, one end of the compression spring abuts against the compression member, and the other end abuts against the material tube pressure plate.

[0016] Furthermore, the heating printing device also includes a heat-insulating fixing bracket arranged at the bottom of the heating component, and the heat-insulating fixing bracket is used to insulate and fix the heating component.

[0017] Furthermore, the heating printing device also includes a ventilation component, and the ventilation component is used to transport protective gas to the printing needle.

[0018] Furthermore, the ventilation assembly includes a preheating coil arranged in the material pipe heating sleeve, and a protective gas circuit formed in the material pipe heating sleeve and the needle insulation plate, the preheating coil is used to transport protective gas, and the protective gas circuit is connected to one side of the printing needle.

[0019] The alloy solder heating printing device proposed by the present invention has the following beneficial effects: (1) The material tube assembly of the heating printing device is provided with a printing needle at the bottom, and the top is connected to an external gas source. The material tube assembly is made of high-temperature resistant material. The material tube assembly is heated by the heating assembly to keep the alloy solder in the material tube assembly in a molten state, thereby providing power from the external gas source to drive the molten alloy solder to be extruded from the printing needle, thereby realizing direct writing printing of the alloy solder; (2) The material tube assembly of the heating printing device includes a central material tube and a sealing joint. The central material tube is used to load the alloy solder. The sealing joint is arranged at the top of the central material tube and connected to the external gas source through the sealing joint. The printing needle is arranged at the bottom of the central material tube, thereby ensuring the sealing of the connection between the central material tube and the external gas source. Then, the external gas source provides power to better drive the molten alloy solder in the material tube assembly to be squeezed out from the micropores of the printing needle, thereby realizing direct writing printing of the alloy solder. (3) The heating printing device is provided with a material tube heating sleeve between the central material tube and the heating tube, so that the heating tube indirectly heats the central material tube, rather than directly heating the central material tube through the heating tube. This is because the heat generated by the heating tube is transferred to the central material tube through the material tube heating sleeve, which can make the central material tube be heated more stably and evenly, thereby stably and evenly heating the alloy solder in the central material tube, so that the alloy solder can be better kept in a molten state, thereby facilitating direct writing printing of the alloy solder; (4) The heating assembly of the heating printing device also includes a heat-insulating shell, which is arranged on the outside of the heating tube. The heat-insulating shell can slow down the heat generated by the heating tube from being conducted outward, which 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; (5) The heating assembly of the heating printing device also includes a water-cooling cover, which is arranged on the outside of the heat-insulating shell. A cooling water path is arranged in the water-cooling cover. By introducing constant temperature cooling water into the cooling water path, the heating tube is further insulated, thereby reducing the heat interference of the heat generated by the heating tube to the outside world, preventing damage to other external components, and preventing workers from accidentally touching the heating tube and causing safety accidents; (6) The heating printing device is provided with a needle insulation plate at the bottom of the material tube heating sleeve. After the material tube heating sleeve is heated, the heat is transferred to the needle insulation plate, so that the needle insulation plate has a certain temperature, and then the needle insulation plate is surrounded by the outer side of the discharge end of the printing needle to insulate the discharge end of the printing needle, slowing down the temperature loss of the discharge end of the printing needle, thereby ensuring the smooth direct writing printing of the alloy solder; (7) The heating printing device of the present heating printing device further comprises a ventilation component, through which a protective gas is delivered to the discharge end of the printing needle, and the alloy solder at the discharge end of the printing needle is protected by the protective gas to prevent the alloy solder from being oxidized, thereby ensuring that the direct writing printing of the alloy solder proceeds smoothly; (8) The ventilation assembly of the heating printing device includes a preheating coil and a protective gas circuit. The preheating coil is arranged in the material pipe heating sleeve for supplying protective gas. The protective gas circuit is formed in the material pipe heating sleeve and the needle insulation plate and is connected to one side of the printing needle, so that the protective gas supplied by the preheating coil is transported to the discharge end of the printing needle through the protective gas circuit, so that the protective gas protects the alloy solder at the discharge end of the printing needle and avoids the temperature of the discharge end of the printing needle being affected by the temperature of the protective gas, thereby further ensuring the smooth direct writing printing of the alloy solder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In the accompanying drawings, like reference numerals are used to represent like elements.

[0021] Figure 1 This is a schematic structural diagram of an alloy solder heating and printing device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the top structure of an alloy solder heating printing device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the bottom structure of an alloy solder heating printing device according to an embodiment of the present invention; Figure 4 for Figure 2 Schematic diagram of the cross section at AA in the middle; Figure 5 for Figure 4 The enlarged schematic diagram of the center C; Figure 6 for Figure 3 Schematic diagram of the cross section at BB; Figure 7 for Figure 6 Enlarged schematic diagram of point D in the middle.

[0022] In the figure: 1. material tube assembly; 11. center material tube; 12. sealing joint; 13. printing needle; 2. heating assembly; 21. material tube heating sleeve; 211. upper limit protrusion; 22. heating tube; 23. insulation shell; 24. water cooling cover; 25. needle insulation plate; 251. V-shaped observation port; 26. insulation ring; 3. connecting piece; 31. material tube pressure ring; 32. clamping piece; 33. material tube pressure plate; 34. clamping spring; 4. insulation fixing bracket; 41. guide protrusion; 5. preheating coil; 6. protective gas circuit; 7. gasket; 8. bolt. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 to Figure 7 An alloy solder heating printing device according to an embodiment of the present invention comprises a material tube assembly 1 and a heating assembly 2. The material tube assembly 1 is loaded with alloy solder. The heating assembly 2 is arranged on the outside of the material tube assembly 1 to heat the alloy solder and control the temperature of the material tube assembly 1. A printing needle 13 is arranged at the bottom of the material tube assembly 1. The alloy solder heated to a molten state in the material tube assembly 1 is extruded for printing. The top of the material tube assembly 1 is connected to an external gas source to provide power for the extrusion of the alloy solder at the printing needle 13.

[0025] In the present application, the heating printing device includes a material tube assembly 1 and a heating assembly 2, wherein the material tube assembly 1 is used to load the alloy solder, and the heating assembly 2 is arranged on the outside of the material tube assembly 1. Since the melting temperature of the alloy solder is high, it can be foreseen that: in the present application, the material tube assembly 1 is made of high temperature resistant material, so that the material tube assembly 1 is heated and controlled by the heating assembly 2 to achieve heating and temperature control of the alloy welding in the material tube assembly 1, so that the alloy solder is kept in a molten state.

[0026] In the present application, a printing needle 13 is provided at the bottom of the material tube assembly 1, and micropores are provided in the printing needle 13, so that the alloy solder in the molten state in the material tube assembly 1 can be extruded through the micropores in the printing needle 13; the top of the material tube assembly 1 is connected to an external air source, and power is provided by the external air source to drive the alloy solder in the molten state in the material tube assembly 1 to be extruded from the micropores of the printing needle 13, thereby completing the direct writing printing of the alloy solder.

[0027] Specifically, in actual implementation, the material tube assembly 1 can be made of stainless steel; the print needle 13 can be made of ceramic material or stainless steel, so that the material tube assembly 1 and the print needle 13 can withstand the high temperature applied by the heating assembly 2, thereby keeping the alloy solder in the material tube assembly 1 and the print needle 13 in a molten state, ensuring that the alloy solder can be smoothly squeezed out of the micropores of the print needle 13, thereby realizing direct writing printing of the alloy solder.

[0028] In practical applications, the heating printing device can be applied to semiconductor packaging by directly writing and printing alloy solder. Specifically, in the process of semiconductor packaging, it is usually necessary to solder the pins of components to the circuit board through solder to achieve circuit packaging. The heating printing device of the present application can extrude alloy solder droplets between the pins of components and the circuit board through the printing needle 13, and after the extruded alloy solder droplets are solidified, the pins of the components are soldered to the circuit board, thereby improving the efficiency of semiconductor packaging.

[0029] In this embodiment, the material tube assembly 1 includes a central material tube 11 and a sealing joint 12. The central material tube 11 is used to load the alloy solder. The sealing joint 12 is arranged at the top of the central material tube 11. The external gas source is connected through the sealing joint 12, thereby ensuring the sealing of the central material tube 11 and the external gas source. In the present application, preferably, the sealing joint 12 adopts a stainless steel ferrule joint to ensure the sealing and heat resistance.

[0030] The printing needle 13 is arranged at the bottom of the central material tube 11, so as to provide power through an external gas source, so as to better drive the molten alloy solder in the material tube assembly 1 to be squeezed out from the micropores of the printing needle 13, thereby realizing direct writing printing of the alloy solder.

[0031] In this embodiment, the heating assembly 2 includes a material tube heating sleeve 21 and a heating tube 22. The material tube heating sleeve 21 is arranged on the outside of the central material tube 11, and the heating tube 22 is arranged on the outside of the material tube heating sleeve 21. The heating tube 22 generates heat to heat the material tube heating sleeve 21, and then the heat is conducted to the central material tube 11 through the material tube heating sleeve 21, thereby realizing high-temperature heating of the central material tube 11 and keeping the alloy solder in the central material tube 11 in a molten state.

[0032] In the present application, the reason why a material tube heating sleeve 21 is arranged between the central material tube 11 and the heating tube 22 so that the heating tube 22 indirectly heats the central material tube 11 instead of directly heating the central material tube 11 through the heating tube 22 is that the heat generated by the heating tube 22 is conducted to the central material tube 11 through the material tube heating sleeve 21, which can make the heating of the central material tube 11 more stable and uniform, thereby stably and evenly heating the alloy solder in the central material tube 11, so that the alloy solder can be better kept in a molten state, thereby facilitating direct writing printing of the alloy solder.

[0033] It can be foreseen that: in the present application, a heating element and a temperature measuring element are built into the heating tube 22. The heating element generates heat, so that the material tube heating sleeve 21 transfers the heat to the central material tube 11, 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, thereby controlling the start and stop of the heating element through the control system, controlling the temperature of the heating tube 22, and further controlling the temperature of the alloy solder in the central material tube 11, so that the alloy solder in the central material tube 11 remains in a molten state.

[0034] In this embodiment, the heating component 2 also includes an insulation shell 23, which is arranged on the outside of the heating tube 22. The insulation shell 23 can slow down the outward conduction of heat generated by the heating tube 22, reduce the heat loss of the heating tube 22, and make the heating of the alloy solder by the heating tube 22 more efficient. At the same time, it reduces the influence of the external temperature on the heating component and ensures the temperature control accuracy of the alloy solder.

[0035] Furthermore, in this embodiment, the heating assembly 2 further includes a water cooling cover 24, which is disposed on the outside of the heat preservation shell 23. A cooling water path is disposed in the water cooling cover 24, and constant temperature cooling water is introduced into the cooling water path to insulate the heating tube 22, thereby reducing the heat interference of the heat generated by the heating tube 22 to the outside world, preventing the temperature of other external parts, especially the precision transmission parts, from being disturbed, resulting in a decrease in accuracy or abnormal damage, and preventing the staff from accidentally touching the heating tube 22, thereby causing a safety accident.

[0036] It can be foreseen that: in the present application, the insulation shell 23 can also play the role of insulating the heating tube 22, that is, the heating tube 22 is first insulated by the insulation shell 23 arranged on the outside of the heating tube 22 to reduce the heat transfer of the heating tube 22, and then the heating tube 22 is further insulated by the water-cooling cover 24 arranged on the outside of the insulation shell 23, thereby reducing the workload of the water-cooling cover 24.

[0037] In this embodiment, the heating assembly 2 further includes a needle insulation board 25, which is disposed at the bottom of the material tube heating sleeve 21. A through hole is provided in the center of the needle insulation board 25, and the discharge end of the printing needle 13 passes through the needle insulation board 25 through the through hole, so that the needle insulation board 25 surrounds the outer side of the discharge end of the printing needle 13.

[0038] Since the printing needle 13 is used to extrude the alloy solder in the central material tube 11 and perform 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 temperature loss, which may cause the alloy solder to be unable to maintain a molten state when being extruded from the discharge end of the printing needle 13, thereby causing the direct writing printing of the alloy solder to be unable to be completed.

[0039] In the present application, the needle insulation plate 25 is arranged at the bottom of the material tube heating sleeve 21. Therefore, after the material tube heating sleeve 21 is heated, the heat is transferred to the needle insulation plate 25, so that the needle insulation plate 25 has a certain temperature, and then the needle insulation plate 25 is surrounded by the outer side of the discharge end of the printing needle 13 to insulate the discharge end of the printing needle 13, slowing down the temperature loss of the discharge end of the printing needle 13, thereby ensuring the smooth direct writing printing of the alloy solder.

[0040] Since the needle insulation board 25 needs to transfer the temperature of the material tube heating sleeve 21 to the discharge end of the printing needle 13, in actual implementation, the needle insulation board 25 needs to be made of a material that is resistant to high temperatures and has strong thermal conductivity. Specifically, the needle insulation board 25 can be made of materials such as aluminum alloy and copper alloy. Furthermore, a thermal insulation coating can be added to the part of the needle insulation board 25 that contacts the air to reduce the heat exchange between the needle insulation board 25 and the outside air.

[0041] In the previous embodiment, it is mentioned that the discharge end of the printing needle 13 passes through the needle insulation board 25 through the through hole, so that the needle insulation board 25 surrounds the outer side of the discharge 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 board 25, through which the state of the printing needle 13 can be observed from the side, further ensuring the smooth direct writing printing of the alloy solder.

[0042] In this embodiment, the heating printing device also includes a connecting member 3, through which the material tube assembly 1 and the heating assembly 2 are detachably connected, so that the material tube assembly 1 can be assembled in the heating assembly 2, and the material tube assembly 1 can be separated from the heating assembly 2, thereby facilitating the replacement and maintenance of the material tube assembly 1, thereby enhancing the practicality of the device.

[0043] In this embodiment, the connecting member 3 includes a material tube pressing ring 31, a clamping member 32 and a material tube pressing plate 33, wherein the material tube pressing ring 31 is sleeved on the outside of the material tube assembly 1. Specifically, a pressing ring groove can be set on the outside of the central material tube 11, and the material tube pressing ring 31 is sleeved in the pressing ring groove, so as to fix the material tube pressing ring 31 on the outside of the central material tube 11.

[0044] The clamping member 32 is fixedly connected to the heating assembly 2. Specifically, the clamping member 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 with the threaded hole to fix the clamping screw on the top of the water cooling cover 24. The material tube pressing plate 33 is rotatably connected to the clamping member 32. Specifically, a sleeve hole can be provided on the material tube pressing plate 33. The material tube pressing plate 33 is sleeved on the clamping member 32 through the sleeve hole, so that the material tube pressing plate 33 can rotate around the clamping member 32.

[0045] When assembling the material pipe assembly 1 in the heating assembly 2 , the central material pipe 11 is inserted into the material pipe heating sleeve 21 of the heating assembly 2 . At this time, the top of the material pipe pressing ring 31 outside the central material pipe 11 is slightly higher than the top plane of the water cooling cover 24 .

[0046] When the material tube pressing plate 33 rotates around the clamping piece 32 to the upper area of ​​the material tube pressing ring 31, the material tube pressing plate 33 is crimped with the material tube pressing ring 31, so that the material tube pressing ring 31 is limited by the material tube pressing plate 33, and the center material tube 11 is fixed in the material tube heating sleeve 21, so that the material tube assembly 1 is assembled in the heating assembly 2; when the material tube pressing plate 33 rotates around the clamping piece 32 to leave the upper area of ​​the material tube pressing ring 31, the material tube pressing plate 33 no longer limits the material tube pressing ring 31, so that the center material tube 11 can be taken out of the material tube heating sleeve 21, so that the material tube assembly 1 and the heating assembly 2 are separated.

[0047] The connecting member 3 of the present application, through the operation of rotating the material tube pressing plate 33 on the clamping member 32, makes the material tube pressing plate 33 and the material tube pressing ring 31 crimped, thereby realizing the assembly of the material tube component 1 in the heating component 2, and through the operation of reverse rotation of the material tube pressing plate 33 on the clamping member 32, makes the material tube pressing plate 33 leave the upper area of ​​the material tube pressing ring 31, thereby realizing the separation of the material tube component 1 and the heating component 2, thereby making the detachable connection between the material tube component 1 and the heating component 2 simple and convenient, easy to implement, and further enhancing the practicality of the device.

[0048] Furthermore, in the present embodiment, the connecting member 3 also includes a compression spring 34. When the compression member 32 is screwed onto the top of the water-cooling hood 24, the compression spring 34 and the material tube pressing plate 33 are both sleeved on the exposed portion of the compression member 32, and one end of the compression spring 34 abuts against the top of the compression member 32, and the other end abuts against the material tube pressing plate 33, thereby pressing the material tube pressing plate 33 against the top of the water-cooling hood 24 through the compression spring 34.

[0049] Since the top of the material tube pressing ring 31 is slightly higher than the top plane of the water cooling cover 24, when the material tube pressing plate 33 rotates around the clamping piece 32 to the upper area of ​​the material tube pressing ring 31, it is crimped with the top of the material tube pressing ring 31, so that the material tube pressing plate 33 limits the material tube pressing ring 31, fixes the central material tube 11 in the material tube heating sleeve 21, and realizes the assembly of the material tube assembly 1 in the heating assembly 2.

[0050] When the tube pressing plate 33 rotates around the clamping member 32 to leave the upper area of ​​the tube pressing ring 31, the tube pressing plate 33 no longer limits the tube pressing ring 31, so that the central tube 11 can be taken out of the tube heating sleeve 21, thereby realizing the separation of the tube assembly 1 and the heating assembly 2.

[0051] In this embodiment, a heat insulating ring 26 is further provided in the heating assembly 2, and the heat insulating ring 26 is provided between the material pipe pressing ring 31 and the heating assembly 2. Specifically, in this application, the top of the material pipe heating sleeve 21, the heating pipe 22 and the insulation shell 23 are on the same horizontal plane, and the top plane of the water cooling cover 24 is higher than the top plane of the material pipe heating sleeve 21, the heating pipe 22 and the insulation shell 23.

[0052] The insulation ring 26 is sleeved on the outside of the central material pipe 11 and is located below the material pipe pressing ring 31. When the central material pipe 11 is inserted into the material pipe heating sleeve 21, the insulation ring 26 is crimped with the top plane of the material pipe heating sleeve 21, the heating pipe 22 and the insulation shell 23. The top of the material pipe pressing ring 31 is slightly higher than the top plane of the water cooling cover 24.

[0053] In the previous embodiment, it is mentioned that the heat-insulating shell 23 is arranged on the outside of the heating tube 22, and can insulate the outer periphery of the heating tube 22. In the present application, the heat-insulating ring 26 is crimped on the top of the material tube heating sleeve 21, the heating tube 22 and the heat-insulating shell 23, and can insulate the top of the material tube heating sleeve 21 and the heating tube 22, which can not only reduce the heat loss generated by the heating tube 22 and improve the temperature control accuracy of the alloy solder, but also prevent the heat of the material tube heating sleeve 21 and the heating tube 22 from being transferred to the material tube pressing plate 33 through the material tube pressing ring 31, thereby affecting the rotation operation of the material tube pressing plate 33.

[0054] 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 outside of the bottom of the material pipe heating sleeve 21, and is fixedly connected to the bottom of the water-cooling cover 24, so that the heating assembly 2 is fixed as a whole through the heat-insulating fixing bracket 4.

[0055] In the present application, the heat-insulating fixed bracket 4 is fixed to the outside of the bottom of the material pipe heating sleeve 21, and is fixedly connected to the bottom of the water-cooling cover 24, so that the heat-insulating fixed bracket 4 can also insulate the bottom of the material pipe heating sleeve 21 and the heating tube 22, thereby further reducing heat loss and improving the temperature control accuracy of the alloy solder. At the same time, it prevents other external components from contacting with the heating tube 22 and causing damage, and prevents staff from accidentally touching the heating tube 22 and causing safety accidents.

[0056] Specifically, in the present application, an upper limit protrusion 211 can be provided on the outer periphery of the material pipe heating sleeve 21, and the heat insulation fixing bracket 4 is inserted into the bottom of the upper limit protrusion 211, so that the top of the heat insulation fixing bracket 4 is limited by the upper limit protrusion 211; the bottom of the material pipe heating sleeve 21 is provided with a connecting plane, and the connecting plane and the bottom of the heat insulation fixing bracket 4 are on the same horizontal plane and are provided with threaded holes. A washer 7 is provided at the bottom of the connecting plane and the heat insulation fixing bracket 4, and one end of the bolt 8 passes through the washer 7 and is screwed to 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, so that the bottom of the heat insulation fixing bracket 4 is limited by the washer 7, and the heat insulation fixing bracket 4 is fixed to the outside of the bottom of the material pipe heating sleeve 21.

[0057] Furthermore, in the present application, the thermal insulation fixing bracket 4 and the material pipe heating sleeve 21 can be connected by point contact, thereby reducing the contact area between the thermal insulation fixing bracket 4 and the material pipe heating sleeve 21, reducing the heat conduction between the two ends, thereby improving the thermal insulation effect of the thermal insulation fixing bracket 4 on the heating component 2, reducing heat loss, and improving the temperature control accuracy of the alloy solder.

[0058] Specifically, the cross-sectional diameter of the inner ring of the heat insulating fixing bracket 4 can be made slightly larger than the cross-sectional diameter of the outer periphery of the material pipe heating sleeve 21, so that the cross-sectional range of the gasket 7 extends from the connecting plane to the bottom of the heat insulating fixing bracket 4, thereby limiting the top of the heat insulating fixing bracket 4 through the upper limit protrusion 211 on the outer periphery of the material pipe heating sleeve 21, and limiting the bottom of the heat insulating fixing bracket 4 by the gasket 7, thereby achieving the fixation of the heat insulating fixing bracket 4 on the outer side of the bottom of the material pipe heating sleeve 21 and reducing the contact area between the heat insulating fixing bracket 4 and the material pipe heating sleeve 21.

[0059] Furthermore, in the present application, at least two guide protrusions 41 may be provided on the inner wall of the heat-insulating fixing bracket 4. Since the cross-sectional diameter of the inner ring of the heat-insulating fixing bracket 4 is slightly larger than the cross-sectional diameter of the outer periphery of the material pipe heating sleeve 21, when the heat-insulating fixing bracket 4 is sleeved on the outer side of the bottom of the material pipe heating sleeve 21, the tips of at least two guide protrusions 41 may contact the outer wall of the material pipe heating sleeve 21 to ensure the concentricity of the heat-insulating fixing bracket 4 and the material pipe heating sleeve 21, thereby ensuring the installation accuracy of the heat-insulating fixing bracket 4 on the outer side of the bottom of the material pipe heating sleeve 21 and reducing the contact area between the inner wall of the heat-insulating fixing bracket 4 and the outer wall of the material pipe heating sleeve 21.

[0060] Since alloy solder is easily oxidized when in contact with air, the chemical and physical properties of the alloy solder are affected. Therefore, in this embodiment, the heating printing device also includes a ventilation component, through which a protective gas is delivered to the discharge end of the printing needle 13, and the alloy solder at the discharge end of the printing needle 13 is protected by the protective gas to prevent the alloy solder from being oxidized, thereby ensuring smooth direct writing printing of the alloy solder.

[0061] 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.

[0062] Furthermore, in this embodiment, the ventilation assembly includes a preheating coil 5 and a protective gas circuit 6. The preheating coil 5 is arranged in the material pipe heating sleeve 21 for supplying protective gas. The protective gas circuit 6 is formed in the material pipe heating sleeve 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 transported to the discharge end of the printing needle 13 through the protective gas circuit 6, so that the protective gas protects the alloy solder at the discharge end of the printing needle 13.

[0063] Specifically, in the present application, an annular groove is formed on the outer periphery of the material pipe heating sleeve 21, and the preheating coil 5 is tightly wound in the annular groove on the outer periphery of the material pipe heating sleeve 21, so that the protective gas introduced into the preheating coil 5 is heated by the material pipe heating sleeve 21.

[0064] The protective gas circuit 6 includes a first passage formed in the material pipe heating sleeve 21 and a second passage formed in the needle insulation plate 25. The first passage extends in a vertical direction, and the top of the first passage is connected to the preheating coil 5, and the bottom is connected to the second passage. The second passage extends in a horizontal direction, and the end of the second passage away from the first passage is on the side of the printing needle 13 and is connected to the internal space of the printing needle 13.

[0065] Therefore, the protective gas introduced into the preheating coil 5, after being heated by the material pipe heating sleeve 21, flows through the first passage and the second passage in sequence, and is transported to the internal space of the discharge end of the printing needle 13, so that the protective gas protects the alloy solder at the discharge end of the printing needle 13, and avoids the temperature of the discharge end of the printing needle 13 being affected by the temperature of the protective gas, further ensuring the smooth direct writing printing of the alloy solder.

[0066] Since the material pipe heating sleeve 21 is used to heat the alloy solder at high temperature, in actual implementation, the preheating coil 5 that transfers heat through the material pipe heating sleeve 21 is also made of high temperature resistant material. Specifically, the preheating coil 5 can be a capillary made of stainless steel.

[0067] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0068] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An alloy solder heating printing device, characterized in that: The invention comprises a material tube assembly (1) and a heating assembly (2), wherein the material tube assembly (1) is loaded with alloy solder, and the heating assembly (2) is arranged on the outside of the material tube assembly (1) for heating the material tube assembly and controlling the temperature of the material tube assembly (1); a printing needle (13) is arranged at the bottom of the material tube assembly (1), and the alloy solder heated to a molten state in the material tube assembly (1) is extruded from the printing needle (13) for printing, and the top of the material tube assembly (1) is connected to an external gas source for providing power for the extrusion of the alloy solder from the printing needle (13).

2. An alloy solder heating printing device as claimed in claim 1, characterized in that: The material tube assembly (1) comprises a central material tube (11) and a sealing joint (12); the central material tube (11) is used to load alloy solder; the printing needle (13) is arranged at the bottom of the central material tube (11); and the sealing joint (12) is arranged at the top of the central material tube (11) and is used to connect to an external gas source.

3. An alloy solder heating printing device as claimed in claim 1, characterized in that: The heating component (2) comprises a material pipe heating sleeve (21) and a heating pipe (22); the heating pipe (22) is arranged on the outside of the material pipe heating sleeve (21) for heating the material pipe heating sleeve (21); and the material pipe heating sleeve (21) is arranged on the outside of the material pipe assembly (1) for transferring heat to the material pipe assembly (1).

4. An alloy solder heating printing device as claimed in claim 3, characterized in that: The heating component (2) further comprises a heat-insulating shell (23), which is arranged outside the heating tube (22) and is used to slow down the conduction of heat generated by the heating tube (22) to the outside.

5. An alloy solder heating printing device as claimed in claim 4, characterized in that: The heating component (2) further comprises a water cooling cover (24) arranged outside the heat-insulating shell (23), wherein a cooling water path is arranged inside the water cooling cover (24) for alleviating heat interference of the heating component (2) to the outside world.

6. An alloy solder heating printing device as claimed in claim 3, characterized in that: The heating assembly (2) further comprises a needle head insulation plate (25) arranged at the bottom of the material pipe heating sleeve (21); the needle head insulation plate (25) is arranged on the outside of the printing needle head (13) and is used to keep the printing needle head (13) warm.

7. An alloy solder heating printing device as claimed in claim 6, characterized in that: A V-shaped observation port (251) is formed on one side of the needle head insulation plate (25), and the V-shaped observation port (251) is used to observe the state of the printing needle head (13) from the side.

8. An alloy solder heating printing device as claimed in claim 1, characterized in that: The heating printing device further comprises a connecting piece (3), wherein the connecting piece (3) is used to detachably connect the material pipe assembly (1) and the heating assembly (2).

9. An alloy solder heating printing device as claimed in claim 8, characterized in that: The connecting member (3) comprises a material tube pressing ring (31) sleeved on the outside of the material tube assembly (1), a pressing member (32) connected to the heating assembly (2), and a material tube pressing plate (33) rotatably connected to the pressing member (32); when the material tube pressing plate (33) rotates around the pressing member (32), it is pressed against the material tube pressing ring (31); when the material tube pressing plate (33) rotates in the opposite direction around the pressing member (32), it leaves the upper area of ​​the material tube pressing ring (31).

10. An alloy solder heating printing device as claimed in claim 9, characterized in that: The connecting member (3) further comprises a compression spring (34) sleeved on the compression member (32), wherein one end of the compression spring (34) abuts against the compression member (32) and the other end abuts against the material tube pressure plate (33).

11. An alloy solder heating printing device as claimed in claim 9, characterized in that: A heat insulating ring (26) is also provided in the heating component (2); the heat insulating ring (26) is provided between the material pipe pressing ring (31) and the heating component (2) and is used to provide heat insulation for the material pipe pressing ring (31).

12. An alloy solder heating printing device as claimed in claim 1, characterized in that: The heating printing device further comprises a heat-insulating fixing bracket (4) arranged at the bottom of the heating component (2), wherein the heat-insulating fixing bracket (4) is used to insulate and fix the heating component (2).

13. An alloy solder heating printing device as claimed in claim 6, characterized in that: The heating printing device also includes a ventilation component, which is used to transport protective gas to the printing needle (13).

14. An alloy solder heating printing device as claimed in claim 13, characterized in that: The ventilation assembly comprises a preheating coil (5) disposed in the material pipe heating sleeve (21), and a protective gas path (6) formed in the material pipe heating sleeve (21) and the needle head insulation plate (25), wherein the preheating coil (5) is used to transport protective gas, and the protective gas path (6) is connected to one side of the printing needle head (13).

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