Printhead assembly

Abstract

The utility model provides a printing head assembly. The printing head assembly comprises a printing head body which is provided with a material storage channel and an exhaust channel communicated with the material storage channel; and the exhaust mechanism is provided with an operation part and a blocking part in linkage arrangement with the operation part, the operation part is located outside the printing head body, the blocking part is movably arranged in the material storage channel, when the blocking part is located at the blocking position, the function of closing the exhaust channel is achieved, and when the blocking part is located at the exhaust position, the function of opening the exhaust channel is achieved. According to the technical scheme of the utility model, the problem that the exhaust operation of the printing head assembly in the prior art is inconvenient is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a printer technical field, specifically, relate to a kind of print head assembly. BACKGROUND

[0002] Solid-state battery has the advantages of high energy density, long cycle life, high safety, overcomes the shortcomings of traditional liquid battery, and will become the mainstream of battery technology in the future. In the preparation process of solid-state battery, material forming and densification is a very important link. In the preparation process of solid-state battery, the forming technology of positive plate and solid-state electrolyte film has dry method and wet method, among them, wet forming has the advantages of forming quality, efficiency and cost. Wet forming, material form is slurry, and the more common forming method is doctor blade coating and 3D printing forming. 3D printing forming is a forming method that has arisen in recent years, and its advantage is that it can realize plane forming and complex three-dimensional curved surface forming. UTILITARY MODEL CONTENT

[0003] In the prior art, when the 3D printer for solid-state battery is printing, the needle cylinder needs to be vented first. The current venting method is to set a venting port on the piston of the needle cylinder, install a sealing plug on the venting port, remove the piston during venting, and install the piston again after venting. However, when the gas in the needle cylinder is exhausted, the piston is located inside the needle cylinder, and it is difficult to install the sealing plug in the venting port, which causes inconvenience in operation.

[0004] In order to solve the above technical problems, the utility model provides a kind of print head assembly, it include: print head body, with storage channel and with storage channel Communication exhaust passage;Exhaust mechanism, exhaust mechanism has operating part and with operating part linkage setting blocking part, operating part is located in the outside of print head body, blocking part is movably arranged in storage channel, when blocking part is located in blocking position, it has the function of closing exhaust passage, when blocking part is located in exhaust position, it has the function of opening exhaust passage.

[0005] As an embodiment, the print head body includes: a material storage cylinder, the inside of the material storage cylinder forms a storage channel;A material pushing rod, the first end of the material pushing rod is movably arranged in the material storage cylinder, the second end of the material pushing rod extends out of the material storage cylinder, the material pushing rod is provided with a mounting channel, the mounting channel extends along the axial direction of the material pushing rod, the exhaust mechanism is movably connected with the mounting channel, one end of the exhaust mechanism extends out of the second end of the material pushing rod to form an operating part, the other end of the exhaust mechanism extends out of the first end of the material pushing rod and is movably arranged in the storage channel to form a blocking part that closes or opens the exhaust passage.

[0006] As an implementation form, the print head body further comprises a piston member connected with the first end of the pushing rod, the piston member is located inside the storage channel, the piston member is provided with a receiving groove, the receiving groove is communicated with the mounting channel, the exhaust channel is communicated with the receiving groove, and the blocking part of the exhaust mechanism is inserted into the receiving groove through the mounting channel, and at least part of the blocking part is movably arranged in the receiving groove.

[0007] As an implementation form, the outer periphery of the piston member is provided with a sealing part in sealing cooperation with the inner wall of the storage barrel, the piston member comprises an exhaust channel, the exhaust channel comprises an air inlet channel and an air outlet channel communicated with the receiving groove, the blocking part is moved to the exhaust position, the air inlet channel and the air outlet channel are communicated through the receiving groove, the blocking part is moved to the blocking position, and the air inlet channel and the air outlet channel are disconnected through the blocking part.

[0008] As an implementation form, the piston member is a cylindrical structure, the cylindrical structure comprises an open end and a closed end, the open end of the cylindrical structure is communicated with the mounting channel, the closed end of the cylindrical structure is provided with an air inlet channel, the circumferential side wall of the cylindrical structure is provided with an air outlet channel, and the inside of the cylindrical structure forms a receiving groove; the blocking part is movably arranged in the receiving groove of the piston member, and the blocking part is in sealing cooperation with the cylindrical structure; when the blocking part moves away from the air inlet channel and moves to the exhaust position, the air outlet channel is opened; when the blocking part moves towards the air inlet channel and moves to the blocking position, the air outlet channel is closed.

[0009] As an implementation form, the circumferential outer wall of the blocking part is in sealing cooperation with the circumferential inner wall of the cylindrical structure; and / or, one side of the blocking part facing the closed end of the cylindrical structure is provided with a sealing surface capable of sealing cooperation with the closed end of the cylindrical structure.

[0010] As an implementation form, along the axial direction of the piston member, the receiving groove penetrates through the piston member, the circumferential side wall of the piston member is provided with an air outlet channel, one end of the blocking part penetrates through the receiving groove and is located on the side of the piston member away from the pushing rod, the side of the blocking part away from the piston member is provided with a sealing surface matched with the piston member, the blocking part and the inner wall of the receiving groove are in clearance fit to form an air inlet channel, when the blocking part moves away from the pushing rod and moves to the exhaust position, the sealing surface is away from the air inlet channel, the air inlet channel is opened, and the storage channel is communicated with the air outlet channel through the air inlet channel; when the blocking part moves towards the pushing rod and moves to the blocking position, the sealing surface blocks the air inlet channel, the air inlet channel is closed, and the storage channel is disconnected with the air outlet channel.

[0011] As an implementation form, the exhaust mechanism comprises a connecting rod and a blocking part connected with the connecting rod, the connecting rod is movably connected with the mounting channel; wherein, one end of the connecting rod away from the blocking part forms an operation part, and the blocking part forms a blocking part.

[0012] In one implementation, at least some of the connecting rods are threaded into the mounting channel.

[0013] In one embodiment, when the receiving groove passes through the piston component, the sealing component includes a main sealing body and an auxiliary sealing body. The main sealing body is located on the side of the piston component away from the push rod. The side of the main sealing body facing the piston component has a sealing surface. The auxiliary sealing body is used to connect the main sealing body and the connecting rod. From the connecting rod to the sealing component, the outer diameter of the auxiliary sealing body gradually increases. The receiving groove includes a first channel and a second channel communicating with the first channel. From the push rod to the piston component, the inner diameter of the second channel gradually increases. The connecting rod is moved so that the auxiliary sealing body and the second channel are in a sealing fit or a clearance fit.

[0014] By applying the technical solution of this utility model, the printhead body has a material storage channel, which can provide a conveying path for printing materials. The exhaust channel connected to the material storage channel can provide an effective gas emission channel for the printhead assembly, which can release the gas accumulated inside the material storage channel in a timely manner, thereby avoiding the gas from affecting the extrusion accuracy of the printing material and the stability of the printing process. The sealing part of the exhaust mechanism is movably set inside the material storage channel, and the operating part of the exhaust mechanism is located outside the printhead body. In this way, the sealing part can be moved directly by operating the operating part, thereby controlling the opening and closing of the exhaust channel. There is no need to insert additional tools into the syringe to install the sealing plug, making the operation more convenient. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of an embodiment of the printhead assembly of this utility model is shown;

[0017] Figure 2 It shows Figure 1 A cross-sectional view of an embodiment of the printhead assembly;

[0018] Figure 3 It shows Figure 2 A close-up view of the printhead assembly;

[0019] Figure 4 It shows Figure 1 A cross-sectional view of a second embodiment of the printhead assembly (the sealing part is located at the sealing position);

[0020] Figure 5 It shows Figure 4 A close-up view of the printhead assembly;

[0021] Figure 6 a sectional view of the print head assembly of embodiment two (occlusion located at exhaust position) is shown; Figure 1 a sectional view of the print head assembly of embodiment two (occlusion located at exhaust position) is shown;

[0022] Figure 7 a sectional view of the print head assembly of embodiment two (occlusion located at exhaust position) is shown; Figure 6 a sectional view of the print head assembly of embodiment two (occlusion located at exhaust position) is shown.

[0023] Wherein, the above drawings include the following reference signs:

[0024] 10, print head body; 11, material storage channel; 13, material pushing rod; 131, installation channel; 14, piston member; 141, accommodating groove; 1411, first channel; 1412, second channel; 142, sealing part; 143, air inlet channel; 144, air outlet channel; 15, material storage cylinder; 16, stepping motor; 17, filter screen; 18, material outlet; 20, exhaust mechanism; 21, operation part; 22, occlusion part; 23, auxiliary occlusion body; 24, connecting rod; 25, sealing surface; 26, main occlusion body. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] As shown in Figures 1 to 7 , the embodiment of the present application provides a print head assembly. The print head assembly comprises: a print head body 10 having a material storage channel 11 and an exhaust channel in communication with the material storage channel 11; an exhaust mechanism 20, the exhaust mechanism 20 having an operation part 21 and an occlusion part 22 arranged in linkage with the operation part 21, the operation part 21 being located outside the print head body 10, the occlusion part 22 being movably arranged in the material storage channel 11, the occlusion part 22 having a function of closing the exhaust channel when the occlusion part 22 is located at an occlusion position, and the occlusion part 22 having a function of opening the exhaust channel when the occlusion part 22 is located at an exhaust position.

[0027] In the above technical solution, the print head body 10 has the material storage channel 11, which can provide a conveying path for the printing material, and the exhaust channel in communication with the material storage channel 11 can provide an effective gas discharge channel for the print head assembly, which can timely release the gas accumulated inside the material storage channel 11, so as to avoid the influence of the gas on the extrusion precision of the printing material and the stability of the printing process; wherein the occlusion part 22 of the exhaust mechanism 20 is movably arranged in the material storage channel 11, and the operation part 21 of the exhaust mechanism 20 is located outside the print head body 10, so that the occlusion part 22 can be directly moved by operating the operation part 21 without the need to insert an additional tool into the needle cylinder to install a sealing plug, thereby controlling the opening and closing of the exhaust channel, and solving the complexity and inconvenience of the operation of the traditional exhaust method.

[0028] Specifically, in the embodiment of the utility model, in the preparation stage before printing, the blocking part 22 moves to the exhaust position, opens the exhaust passage, and can quickly remove the accumulated gas in the storage passage 11, avoids the formation of bubbles in the material extrusion process, and affects the uniformity of the printing material and the density of the printed structure; during printing, the blocking part 22 moves to the blocking position, tightly closes the exhaust passage, prevents gas leakage, maintains the stable pressure inside the print head, ensures the uniformity and precision of material extrusion, avoids the interference of gas emission on the printing process, and improves the printing quality and efficiency.

[0029] As shown in Figure 2 , Figure 4 and Figure 6 , in the embodiment of the utility model, the print head body 10 comprises: a storage cylinder 15, the inside of the storage cylinder 15 forms a storage passage 11; a pushing rod 13, the first end of the pushing rod 13 is movably arranged in the storage cylinder 15, the second end of the pushing rod 13 extends out of the storage cylinder 15, the pushing rod 13 is provided with a mounting passage 131, the mounting passage 131 extends along the axial direction of the pushing rod 13, an exhaust mechanism 20 is movably connected with the mounting passage 131, one end of the exhaust mechanism 20 extends out of the second end of the pushing rod 13 to form an operating part 21, and the other end of the exhaust mechanism 20 extends out of the first end of the pushing rod 13 and is movably arranged in the storage passage 11 to form a blocking part 22 that closes or opens the exhaust passage.

[0030] In the above technical solution, the inside of the storage cylinder 15 forms the storage passage 11, which can store and transport the printing material, and the first end of the pushing rod 13 is movably arranged in the storage cylinder 15, and the second end of the pushing rod 13 extends out of the storage cylinder 15, so that the pushing rod 13 can push the printing material through the storage passage 11 according to the printing requirement, and the mounting passage 131 is arranged on the pushing rod 13 and extends along the axial direction, which provides a movable connection platform for the exhaust mechanism 20, so that the exhaust mechanism 20 can form a stable and adjustable connection with the pushing rod 13, one end of the exhaust mechanism 20 extends out of the second end to form the operating part 21, which is convenient for the user to operate outside the print head body 10 and control the movement of the blocking part 22, and the other end of the exhaust mechanism 20 extends out of the first end to form the blocking part 22, which can tightly close the exhaust passage communicated with the storage passage 11 when the blocking part 22 is located at the blocking position, prevents gas leakage, maintains the stability of the printing process and the purity of the material extrusion, opens the exhaust passage when the blocking part 22 moves to the exhaust position, quickly releases the gas in the storage passage 11, avoids the formation of bubbles, ensures the uniform extrusion of the printing material and the density of the printed structure, and improves the printing quality and efficiency.

[0031] As shown in Figure 3 , Figure 4 andFigure 7 As shown in the utility model, the printing head body 10 further comprises a piston member 14 connected with the first end of the pushing rod 13, the piston member 14 is located inside the material storage channel 11, the piston member 14 is provided with a containing groove 141, the containing groove 141 is communicated with the installation channel 131, the exhaust channel is communicated with the containing groove 141, the blocking part 22 of the exhaust mechanism 20 is inserted into the containing groove 141 through the installation channel 131, and at least part of the blocking part 22 is movably arranged in the containing groove 141.

[0032] In the above technical solution, the piston member 14 is connected with the first end of the pushing rod 13, the containing groove 141 on the piston member 14 is not only communicated with the installation channel 131 of the pushing rod 13, but also communicated with the exhaust channel, so that the piston member 14 can provide a moving space and a platform for function implementation for the exhaust mechanism 20; at least part of the blocking part 22 can be inserted into the containing groove 141 through the installation channel 131, and the closing or opening of the exhaust channel can be realized by changing the position of the blocking part 22 in the containing groove 141.

[0033] Preferably, in the embodiment of the utility model, the pushing rod 13 is a pushing screw rod.

[0034] As shown in the utility model, the outer periphery of the piston member 14 is provided with a sealing part 142 in sealing cooperation with the inner wall of the material storage cylinder 15, the piston member 14 comprises an exhaust channel, the exhaust channel comprises an air inlet channel 143 and an air outlet channel 144 communicated with the containing groove 141, the air inlet channel 143 and the air outlet channel 144 are communicated through the containing groove 141 when the blocking part 22 is moved to the exhaust position, and the air inlet channel 143 and the air outlet channel 144 are disconnected through the blocking part 22 when the blocking part 22 is moved to the blocking position. Figure 3 , Figure 5 and Figure 7 As shown in the utility model, the outer periphery of the piston member 14 is provided with a sealing part 142 in sealing cooperation with the inner wall of the material storage cylinder 15, the piston member 14 comprises an exhaust channel, the exhaust channel comprises an air inlet channel 143 and an air outlet channel 144 communicated with the containing groove 141, the air inlet channel 143 and the air outlet channel 144 are communicated through the containing groove 141 when the blocking part 22 is moved to the exhaust position, and the air inlet channel 143 and the air outlet channel 144 are disconnected through the blocking part 22 when the blocking part 22 is moved to the blocking position.

[0035] In the above technical solution, the sealing part 142 provided on the outer periphery of the piston member 14 is in sealing cooperation with the inner wall of the material storage cylinder 15, so that the sealing property of the material during the pushing and printing processes can be ensured, the leakage of the material is avoided, and the purity of the printing material and the stable pressure during the pushing process are maintained; and the piston member 14 is provided with the containing groove 141, and the air inlet channel 143 and the air outlet channel 144 communicated with the containing groove 141, so that the gas in the material storage channel 11 can enter the inside of the piston member 14 through the air inlet channel 143 and then be discharged through the air outlet channel 144, and the discharge of the gas can be realized.

[0036] Specifically, in the embodiment of the utility model, the movement of the blocking part 22 in the containing groove 141 can directly control the communication state of the air inlet channel 143 and the air outlet channel 144, as shown in the utility model, Figure 7As shown, when the blocking part 22 is located at the exhaust position, the air inlet channel 143 and the air outlet channel 144 are communicated via the accommodating groove 141, the gas in the storage channel 11 is discharged, the formation of bubbles is avoided, the uniformity and compactness of the printing material extrusion are ensured, and the printing precision and the quality of the printed structure are improved. Figure 5 As shown, when the blocking part 22 is moved to the blocking position, the air inlet channel 143 and the air outlet channel 144 are disconnected by the blocking part 22, and the exhaust channel is closed, so that the leakage of gas during printing is prevented, the stable pressure inside the printing head is maintained, and the intrusion of external air is also avoided, so that the purity of the printing material can be ensured, and the stability and reliability of printing are improved.

[0037] It should be noted that in the embodiment of the utility model, the air inlet channel 143 and the air outlet channel 144 are communicated through the accommodating groove 141 to form the exhaust channel.

[0038] Specifically, in the embodiment of the utility model, one end of the piston member 14 close to the discharge port 18 of the storage cylinder 15 is tightly attached to the inner wall of the storage cylinder 15 (i.e., a sealing part 142 is formed), and the other end of the piston member 14 away from the discharge port 18 of the storage cylinder 15 has a gap with the inner wall of the storage cylinder 15, so that the exhaust is facilitated.

[0039] As shown, in the embodiment of the utility model, the exhaust mechanism 20 includes a connecting rod member 24 and a blocking member connected with the connecting rod member 24, and the connecting rod member 24 is movably connected with the mounting channel 131. Figures 2 to 5

[0040] In the above technical solution, the exhaust mechanism 20 is composed of the connecting rod member 24 and the blocking member, the blocking member is connected with the connecting rod member 24 and forms the blocking part 22, and the connecting rod member 24 is movably connected with the mounting channel 131, and one end of the connecting rod member 24 away from the blocking part 22 forms the operating part 21, so that the movement of the exhaust mechanism 20 is manually controlled from outside.

[0041] Specifically, in the embodiment of the utility model, in the specific operation, the connecting rod member 24 is moved in the mounting channel 131 by the control of the operating part 21, the blocking part 22 is driven to move along the axial direction of the piston member 14, and the opening and closing of the air inlet channel 143 are realized.

[0042] As shown, in the embodiment of the utility model, at least part of the connecting rod member 24 is threadedly matched with the mounting channel 131. Figure 4

[0043] ​​In the technical scheme, the rotating operation part 21 can realize the movement of the connecting rod 24 through the threaded cooperation, so that the plugging part 22 can move relative to the piston member 14 to open or close the air inlet channel 143, thereby controlling the discharge of the gas in the material storage channel 11.

[0044] Further, the threaded cooperation design makes the movement of the plugging part 22 more stable and accurate, avoids the shaking and error in the gas discharge control, ensures the timeliness and sufficiency of the gas discharge, effectively reduces the formation of bubbles in the printing material, and ensures the uniformity of the material extrusion and the density of the printed structure.

[0045] Preferably, in the embodiment of the utility model, the air inlet channel 143 and the air outlet channel 144 are located on both sides of the sealing part 142.

[0046] Preferably, in the embodiment of the utility model, the piston member 14 is made of Teflon, and the material storage barrel 15 is made of high borosilicate glass.

[0047] Embodiment one

[0048] As shown in Figure 2 and Figure 3 In the embodiment one of the utility model, the piston member 14 is a cylindrical structure, the cylindrical structure includes an open end and a closed section, the open end of the cylindrical structure is communicated with the installation channel 131, the closed end of the cylindrical structure is provided with the air inlet channel 143, the circumferential sidewall of the cylindrical structure is provided with the air outlet channel 144, and the inside of the cylindrical structure forms the accommodating groove 141;The plugging part 22 is movably arranged in the accommodating groove 141 of the piston member 14, and the plugging part 22 is sealingly cooperated with the cylindrical structure;When the plugging part 22 moves away from the air inlet channel 143 and moves to the exhaust position, the air outlet channel 144 is opened;When the plugging part 22 moves to the side close to the air inlet channel 143 and moves to the plugging position, the air outlet channel 144 is closed.

[0049] Through the above setting, the air inlet channel 143 opened on the closed end, the air outlet channel 144 on the circumferential sidewall of the cylindrical structure and the accommodating groove 141 formed in the inside of the cylindrical structure jointly constitute the exhaust channel capable of passing through the gas, so that the effective discharge of the gas before material extrusion can be realized.

[0050] Specifically, in the embodiment one of the utility model, the plugging portion 22 is movably arranged and forms sealing cooperation with the cylindrical structure, so that the position change of the plugging portion 22 can control the opening and closing of the exhaust passage. Wherein, when the plugging portion 22 moves to the exhaust position away from the air inlet passage 143, the air outlet passage 144 is opened, the gas in the storage cylinder 15 can enter the inside of the piston member 14 through the air inlet passage 143, and then is discharged through the air outlet passage 144, effectively reducing the influence of the gas in the material on the printing precision, ensuring the uniform extrusion of the printing material and the compactness of the printing structure;When the plugging portion 22 moves to the plugging position close to the air inlet passage 143, the air outlet passage 144 is closed by the plugging portion 22, preventing the leakage of gas during the printing process, maintaining the stability of the internal pressure of the print head, and also avoiding the intrusion of external air, further ensuring the purity of the printing material and the stability of the printing process.

[0051] Specifically, as shown in the embodiment one of the utility model, the open end of the cylindrical structure is connected with the pushing rod 13, preferably, part of the cylindrical structure is screwed into the mounting passage 131 and connected with the inner wall of the mounting passage 131, so that the pushing rod 13 can smoothly push the piston member 14 forward, thereby realizing the accurate extrusion of the printing material. Figure 3 As shown in the embodiment one of the utility model, the circumferential outer wall of the plugging portion 22 is sealingly connected with the circumferential inner wall of the cylindrical structure.

[0052] Figure 3 In the above technical solution, through the sealing cooperation between the circumferential outer wall of the plugging portion 22 and the circumferential inner wall of the cylindrical structure, when the plugging portion 22 moves to the plugging position, the plugging portion 22 is located between the air inlet passage 143 and the air outlet passage 144, which can disconnect the communication between the air outlet passage 144 and the air inlet passage 143, so as to tightly close the air outlet passage 144, effectively prevent the leakage of gas, maintain the stable pressure inside the print head body 10, avoid the intrusion of external air, and ensure the purity of the printing material and the sealing property of the pushing process;When the plugging portion 22 is operated to the exhaust position, the plugging portion 22 is located on the side of the air outlet passage 144 away from the air inlet passage 143, and the air outlet passage 144 and the air inlet passage 143 are exposed, so that the air inlet passage 143 and the air outlet passage 144 are communicated, so that the air outlet passage 144 is opened, the gas in the storage passage 11 can smoothly enter the containing groove 141 through the air inlet passage 143, and then is discharged through the air outlet passage 144, realizing the rapid discharge of the gas, avoiding the formation of bubbles, ensuring the uniformity of the printing material extrusion and the compactness of the printing structure, thereby improving the printing quality and efficiency.

[0053] In the above technical solution, through the sealing cooperation between the circumferential outer wall of the plugging portion 22 and the circumferential inner wall of the cylindrical structure, when the plugging portion 22 moves to the plugging position, the plugging portion 22 is located between the air inlet passage 143 and the air outlet passage 144, which can disconnect the communication between the air outlet passage 144 and the air inlet passage 143, so as to tightly close the air outlet passage 144, effectively prevent the leakage of gas, maintain the stable pressure inside the print head body 10, avoid the intrusion of external air, and ensure the purity of the printing material and the sealing property of the pushing process;When the plugging portion 22 is operated to the exhaust position, the plugging portion 22 is located on the side of the air outlet passage 144 away from the air inlet passage 143, and the air outlet passage 144 and the air inlet passage 143 are exposed, so that the air inlet passage 143 and the air outlet passage 144 are communicated, so that the air outlet passage 144 is opened, the gas in the storage passage 11 can smoothly enter the containing groove 141 through the air inlet passage 143, and then is discharged through the air outlet passage 144, realizing the rapid discharge of the gas, avoiding the formation of bubbles, ensuring the uniformity of the printing material extrusion and the compactness of the printing structure, thereby improving the printing quality and efficiency.

[0054] ​Preferably, in Embodiment 1 of this utility model, the sealing surface 25 of the sealing part 22 can abut against the closed end.

[0055] like Figure 3 As shown, in Embodiment 1 of this utility model, the sealing part 22 has a sealing surface 25 on the side facing the closed end of the cylindrical structure, which can seal and cooperate with the closed end of the cylindrical structure.

[0056] In the above technical solution, when the sealing part 22 moves to the sealing position, the sealing surface 25 fits tightly with the closed end of the piston component 14, effectively closing the air intake channel 143, thereby further preventing accidental gas leakage during the printing process, maintaining stable pressure inside the print head, and also preventing the mixing of external air, ensuring the purity of the printing material and the sealing of the extrusion process.

[0057] Example 2

[0058] like Figures 4 to 7 As shown, the difference between Embodiment 2 and Embodiment 1 is that, along the axial direction of the piston member 14, the receiving groove 141 passes through the piston member 14, and an air outlet channel 144 is provided on the circumferential side wall of the piston member 14. One end of the sealing part 22 passes through the receiving groove 141 and is located on the side of the piston member 14 away from the push rod 13. The side of the sealing part 22 away from the piston member 14 is provided with a sealing surface 25 that cooperates with the piston member 14. The gap between the sealing part 22 and the inner wall of the receiving groove 141 is... The sealing surface 25 moves away from the air intake channel 143 to the exhaust position when the sealing part 22 moves away from the push rod 13 and moves to the exhaust position. The air intake channel 143 is opened and the storage channel 11 is connected to the exhaust channel 144 through the air intake channel 143. When the sealing part 22 moves closer to the push rod 13 and moves to the sealing position, the sealing surface 25 blocks the air intake channel 143 and the air intake channel 143 is closed. The storage channel 11 is disconnected from the exhaust channel 144.

[0059] In the above technical solution, one end of the sealing part 22 passes through the receiving groove 141 and is located on the side of the piston member 14 away from the push rod 13. The side of the sealing part 22 away from the piston member 14 is provided with a sealing surface 25 that cooperates with the piston member 14. The sealing part 22 can form an air intake channel 143 by gap cooperation with the inner wall of the receiving groove 141. In this way, the movement of the sealing part 22 can realize selective communication between the air intake channel 143 and the storage channel 11. When the sealing part 22 moves away from the piston component 14 to the exhaust position, the sealing surface 25 maintains a distance from the air inlet channel 143. At this time, the air inlet channel 143 is open, and the gas in the storage channel 11 can be smoothly discharged through the air inlet channel 143 and the air outlet channel 144, avoiding the formation of air bubbles in the printing material, ensuring the uniformity of material extrusion and the density of the printed structure, and significantly improving printing quality and efficiency. When the sealing part 22 moves closer to the piston component 14 to the sealing position, the sealing surface 25 tightly seals the air inlet channel 143, so that the air inlet channel 143 is closed, the gas flow between the storage channel 11 and the air outlet channel 144 is cut off, preventing gas leakage during printing, maintaining stable pressure inside the print head, and also preventing the intrusion of external air, further ensuring the purity of the printing material and the sealing of the extrusion process.

[0060] like Figures 5 to 7 As shown in Embodiment 2 of this utility model, when the receiving groove 141 passes through the piston component 14, the sealing component includes a main sealing body 26 and an auxiliary sealing body 23. The main sealing body 26 is located on the side of the piston component 14 away from the push rod 13. The side of the main sealing body 26 facing the piston component 14 is provided with a sealing surface 25. The auxiliary sealing body 23 is used to connect the main sealing body 26 and the connecting rod 24. From the connecting rod 24 to the sealing component, the outer diameter of the auxiliary sealing body 23 gradually increases. The receiving groove 141 includes a first channel 1411 and a second channel 1412 communicating with the first channel 1411. From the push rod 13 to the piston component 14, the inner diameter of the second channel 1412 gradually increases. The connecting rod 24 is moved so that the auxiliary sealing body 23 is in a sealed fit or a clearance fit with the second channel 1412.

[0061] In the above technical solution, the sealing surface 25 can block or open the air inlet channel 143, and the auxiliary sealing body 23 can form a seal or gap fit with the second channel 1412. Through the dual sealing effect of the main sealing body 26 and the auxiliary sealing body 23, the sealing effect of the air inlet channel 143 can be improved, and the gas flow between the material storage channel 11 and the air outlet channel 144 can be cut off. This can maintain the stability of the internal pressure of the print head, prevent the intrusion of external air, and ensure the purity of the printing material and the sealing of the extrusion process.

[0062] Specifically, the auxiliary sealing body 23 is used for connecting the main sealing body 26 and the connecting rod 24 in the second embodiment of the utility model, and stability linkage between the two is ensured.

[0063] Preferably, the connecting rod 24 is in clearance fit with the first channel 1411 in the second embodiment of the utility model.

[0064] Preferably, the main sealing body 26 is a plug, and the auxiliary sealing body 23 is a sealing plate in the second embodiment of the utility model.

[0065] The other structures of the second embodiment are the same as those of the first embodiment, and will not be repeated here.

[0066] It should be noted that the printhead assembly further comprises a stepping motor 16, a filter screen 17 arranged in the material storage cylinder 15, a material pushing rod 13, an exhaust mechanism 20, and a piston member 14 and the stepping motor 16 together constitute a material pushing mechanism, and the stepping motor 16 receives pulse driving to push the material pushing mechanism to extrude the material.

[0067] Specifically, after the material storage cylinder 15 is filled with printing paste, the material pushing mechanism enters the material storage cylinder 15 under the driving of the stepping motor 16, and a section of air is closed at this time. The first exhaust mode is: loosen the exhaust mechanism 20 locking nut, push the exhaust mechanism 20 to the material outlet direction of the material storage cylinder 15 by a section, at this time, the closed air can be discharged from the gap of the exhaust mechanism 20, and after the piston member 14 is tightly attached to the paste liquid surface, the exhaust mechanism 20 is withdrawn, sealed and locked. The second exhaust mode is: by rotating the exhaust mechanism 20, the exhaust mechanism 20 is moved away from the material outlet 18 of the material storage cylinder 15, at this time, the gas enters the inside of the piston member 14 through the air inlet channel, and then is discharged to the outside of the piston member 14 through the air outlet channel. The stepping motor 16 receives pulse driving to push the material pushing mechanism to spiral forward, and the paste is filtered by the filter screen 17 to remove large particle substances, and then is discharged from the material outlet 18, and then is conveyed to the high-frequency vibration printing head through the printing head material pipe, so that the material is delivered to the high-frequency vibration printing head for printing and forming.

[0068] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: the print head body has a storage channel, which can provide a conveying path for the printing material, and the exhaust channel communicated with the storage channel can provide an effective gas discharge channel for the print head assembly, which can timely release the accumulated gas inside the storage channel, thereby avoiding the influence of the gas on the extrusion precision of the printing material and the stability of the printing process; wherein the blocking part of the exhaust mechanism is movably arranged in the storage channel, and the operating part of the exhaust mechanism is located outside the print head body, so that the additional tool does not need to be inserted into the needle cylinder to install the sealing plug, and the blocking part can be directly moved by operating the operating part, thereby facilitating manual operation to control the opening and closing of the exhaust channel, and further avoiding the complexity and inconvenience of the traditional exhaust method in operation.

[0069] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model, and the utility model can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A printhead assembly, characterized in that, include: The printhead body (10) has a material storage channel (11) and an exhaust channel communicating with the material storage channel (11); The exhaust mechanism (20) has an operating part (21) and a blocking part (22) that is linked to the operating part (21). The operating part (21) is located outside the print head body (10). The blocking part (22) is movably disposed in the material storage channel (11). When the blocking part (22) is in the blocking position, it has the function of closing the exhaust channel. When the blocking part (22) is in the exhaust position, it has the function of opening the exhaust channel.

2. The printhead assembly according to claim 1, characterized in that, The printhead body (10) includes: Storage cylinder (15), the storage channel (11) is formed inside the storage cylinder (15); A pusher rod (13) is provided, the first end of which is movably disposed in the storage cylinder (15), the second end of which extends out of the storage cylinder (15), and an installation channel (131) is provided on the pusher rod (13). The installation channel (131) extends along the axial direction of the pusher rod (13). The exhaust mechanism (20) is movably connected to the installation channel (131). One end of the exhaust mechanism (20) extends out of the second end of the pusher rod (13) to form the operating part (21), and the other end of the exhaust mechanism (20) extends out of the first end of the pusher rod (13) and is movably disposed in the storage channel (11) to form the sealing part (22) for closing or opening the exhaust channel.

3. The printhead assembly according to claim 2, characterized in that, The printhead body (10) also includes a piston component (14) connected to the first end of the push rod (13). The piston component (14) is located inside the storage channel (11). The piston component (14) is provided with a receiving groove (141). The receiving groove (141) is connected to the installation channel (131). The exhaust channel is connected to the receiving groove (141). The sealing part (22) of the exhaust mechanism (20) is inserted into the receiving groove (141) through the installation channel (131), and at least part of the sealing part (22) is movably disposed in the receiving groove (141).

4. The printhead assembly according to claim 3, characterized in that, The piston component (14) is provided with a sealing part (142) on its outer periphery that seals with the inner wall of the storage cylinder (15). The piston component (14) includes the exhaust channel, which includes an air inlet channel (143) and an air outlet channel (144) that communicate with the receiving groove (141). When the blocking part (22) is moved to the exhaust position, the air inlet channel (143) and the air outlet channel (144) are connected through the receiving groove (141). When the blocking part (22) is moved to the blocking position, the air inlet channel (143) and the air outlet channel (144) are disconnected through the blocking part (22).

5. The printhead assembly according to claim 4, characterized in that, The piston component (14) is a cylindrical structure, which includes an open end and a closed end. The open end of the cylindrical structure is connected to the mounting channel (131), and the closed end of the cylindrical structure is provided with the air intake channel (143). The circumferential sidewall of the cylindrical structure is provided with the air outlet channel (144), and the interior of the cylindrical structure forms the receiving groove (141). The sealing part (22) is movably disposed in the receiving groove (141) of the piston member (14), and the sealing part (22) is sealed to the cylindrical structure; When the blocking part (22) moves away from the air intake passage (143) and moves to the exhaust position, the exhaust passage (144) opens; when the blocking part (22) moves closer to the air intake passage (143) and moves to the blocking position, the exhaust passage (144) closes.

6. The printhead assembly according to claim 5, characterized in that, The outer circumferential wall of the sealing part (22) is in a sealing fit with the inner circumferential wall of the cylindrical structure; and / or, The sealing part (22) has a sealing surface (25) on the side facing the closed end of the cylindrical structure, which can seal and cooperate with the closed end of the cylindrical structure.

7. The printhead assembly according to claim 4, characterized in that, Along the axial direction of the piston member (14), the receiving groove (141) passes through the piston member (14). The circumferential sidewall of the piston member (14) is provided with the air outlet channel (144). One end of the sealing part (22) passes through the receiving groove (141) and is located on the side of the piston member (14) away from the push rod (13). The side of the sealing part (22) away from the piston member (14) is provided with a sealing surface (25) that cooperates with the piston member (14). The sealing part (22) and the inner wall of the receiving groove (141) are clearance-fitted to form the air inlet channel (143). When the sealing part (22) moves away from the push rod (13) and moves to the exhaust position, the sealing surface (25) moves away from the air inlet channel (143), the air inlet channel (143) opens, and the storage channel (11) is connected to the exhaust channel (144) through the air inlet channel (143); when the sealing part (22) moves closer to the push rod (13) and moves to the sealing position, the sealing surface (25) blocks the air inlet channel (143), the air inlet channel (143) closes, and the storage channel (11) is disconnected from the exhaust channel (144).

8. The printhead assembly according to any one of claims 2 to 7, characterized in that, The exhaust mechanism (20) includes a connecting rod (24) and a sealing member connected to the connecting rod (24). The connecting rod (24) is movably connected to the installation channel (131). The end of the connecting rod (24) away from the sealing member forms the operating part (21), and the sealing member forms the sealing part (22).

9. The printhead assembly according to claim 8, characterized in that, At least a portion of the connecting rod (24) is threaded into the mounting channel (131).

10. The printhead assembly according to claim 8, characterized in that, When the receiving groove (141) passes through the piston component (14), the sealing component includes a main sealing body (26) and an auxiliary sealing body (23). The main sealing body (26) is located on the side of the piston component (14) away from the push rod (13). The side of the main sealing body (26) facing the piston component (14) is provided with a sealing surface (25). The auxiliary sealing body (23) is used to connect the main sealing body (26) and the connecting rod (24). From the connecting rod (24) to the sealing component, the outer diameter of the auxiliary sealing body (23) gradually increases. The receiving groove (141) includes a first channel (1411) and a second channel (1412) communicating with the first channel (1411). From the pusher rod (13) to the piston member (14), the inner diameter of the second channel (1412) gradually increases. The connecting rod (24) is moved so that the auxiliary sealing body (23) is in a sealed or clearance fit with the second channel (1412).

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