Sealing structure of desktop titanium alloy additive equipment and additive equipment

Abstract

The application relates to a sealing structure of a desktop titanium alloy additive device and the additive device, and relates to the technical field of additive processing devices.The sealing structure comprises a sealing cover, the sealing cover is fixedly and sealingly connected with a cabin body of the additive device, a sealing opening is formed in the sealing cover and communicates with an internal space of the cabin body, and an end portion of an additive processing head can extend into the internal space of the cabin body through the sealing opening; a driving mechanism is arranged outside the cabin body, is connected with the additive processing head, and can drive the additive processing head to extend out of the sealing cover and be accommodated into the sealing cover; a sealing element is arranged at an end portion of the sealing cover; and a printing substrate is connected with a space moving mechanism of the additive device, and can abut against the sealing element to form plugging of the sealing opening.The application can avoid the influence of a gap between a wire feeding hole of a welding gun and wire material on additive environment vacuum operation, reduce the time required for additive vacuum environment operation, and improve the efficiency of additive environment generation.

Description

Technical Field

[0001] This application relates to the field of additive manufacturing equipment technology, and in particular to a sealing structure and additive manufacturing equipment for a desktop titanium alloy additive manufacturing equipment. Background Technology

[0002] Additive manufacturing equipment is a specialized tool that transforms digital models into physical components based on the principle of "layered manufacturing and progressive stacking." Its core function is manufacturing through material accumulation rather than traditional "subtractive machining" or "equal-material casting." It breaks the limitations of traditional processes on complex structures, enabling the efficient production of customized, lightweight, and integrated components, and has been widely applied in aerospace, medical, automotive, and energy fields. In the additive manufacturing process of titanium alloys, to prevent irreversible reactions between the titanium alloy and various components in the air, which could generate harmful phases and damage material properties, the additive manufacturing process requires first performing a vacuum operation to purge the air from the additive environment before filling it with a protective gas. Ensuring a stable vacuum environment is crucial for the additive manufacturing of titanium alloys.

[0003] Existing patent document CN111633304B discloses an atmosphere protection device for additive manufacturing of nickel-titanium alloy arc-fused wire. In this patent document, the welding torch is connected to the cloth cover via a fastening ring to ensure the airtightness of the connection between the welding torch and the cloth cover. However, normally the wire feed hole of the welding torch is connected to the external atmosphere, and the wire entering from the outside causes constant leakage through pores. When performing vacuum operation in the additive manufacturing environment, the gap between the wire and the wire feed hole will hinder the generation of the vacuum environment, thereby prolonging the time required for vacuum operation in the additive manufacturing environment and reducing the efficiency of additive manufacturing environment generation. Utility Model Content

[0004] To address the problem that the gap between the wire and the wire feed hole hinders the generation of a vacuum environment, prolongs the time required for additive vacuum environment operation, and leads to a decrease in the efficiency of additive environment generation, this application provides a sealing structure for a desktop titanium alloy additive manufacturing device and an additive manufacturing device.

[0005] The sealing structure of a desktop titanium alloy additive manufacturing device provided in this application adopts the following technical solution: A sealing structure and additive manufacturing equipment for a desktop titanium alloy additive manufacturing device are disclosed, comprising: a sealing cover, which is fixedly and sealed to the housing of the additive manufacturing device, the sealing cover having a sealing port communicating with the internal space of the housing, and the end of an additive manufacturing head extending into the internal space of the housing through the sealing port; a drive mechanism, which is disposed outside the housing and connected to the additive manufacturing head, and is capable of driving the additive manufacturing head to extend out of and retract into the sealing cover; a sealing element, which is disposed at the end of the sealing cover; and a printing substrate, which is connected to the spatial movement mechanism of the additive manufacturing device and can abut against the sealing element to form a seal against the sealing port.

[0006] By adopting the above technical solution, when performing vacuum operation on the additive manufacturing environment, the drive mechanism drives the end of the additive processing head to retract into the sealing cover, and then the spatial movement mechanism of the additive manufacturing equipment drives the printing substrate to connect with the sealing component, sealing the sealing opening of the sealing cover, thus isolating the additive manufacturing environment from the outside world, and then performing vacuum operation on the additive manufacturing environment. Compared with the prior art, the solution of this application moves the additive processing head to a space isolated from the additive manufacturing environment, making the additive manufacturing environment more thoroughly isolated from the outside atmosphere. This can avoid the influence of the gap between the filament feeding hole of the additive processing head and the filament on the vacuum operation of the additive manufacturing environment, reduce the time required for the additive vacuum environment operation, and improve the efficiency of additive environment generation.

[0007] Preferably, a guide post is fixedly provided on the cabin of the additive manufacturing equipment. The guide post is arranged along the sliding direction of the additive manufacturing head. A fixing block is provided on the guide post and is fixedly connected to the additive manufacturing head. The fixing block is slidably connected to the guide post through a linear bearing.

[0008] By adopting the above technical solution, during the process of the drive mechanism driving the additive processing head to extend or retract into the sealing cover, the fixed block slides along the guide column through the linear bearing, which can achieve low-resistance and stable sliding of the additive processing head, ensuring the smoothness and accuracy of the additive processing head movement.

[0009] Preferably, the sealing element includes a first sealing ring, the sealing opening is located inside the first sealing ring, and one side of the first sealing ring is sealed and fixedly connected to the sealing cover.

[0010] By adopting the above technical solution, when performing vacuum operations on the additive environment, the first sealing ring, together with the sealing cover and the printing substrate, can further enhance the isolation effect between the additive environment and the outside world, ensuring that outside air will not enter the additive environment through the sealing port during the vacuuming process. This more effectively avoids the influence of the filament feeding hole of the additive processing head and the gap between the filament and the filament on the vacuum operation, further shortens the operation time of the additive vacuum environment, and improves the reliability and stability of the additive environment generation.

[0011] Preferably, an annular groove adapted to the first sealing ring is formed on the end face of the additive manufacturing head, a portion of the first sealing ring is fixedly embedded in the annular groove, and another portion protrudes from the annular groove.

[0012] By adopting the above technical solution, the first sealing ring is partially embedded in the annular groove on the end face of the additive processing head, while the other part protrudes, which enhances the sealing effect between the additive processing head and the sealing cover, further reducing the possibility of outside air entering the additive environment through the connection between the additive processing head and the sealing cover, and improving the sealing and stability of the additive environment.

[0013] Preferably, it also includes a sliding seal, through which the additive manufacturing head and the housing are connected.

[0014] By adopting the above technical solution, the dynamic sealing component can achieve a seal between the additive manufacturing head and the chamber, preventing outside air from entering the additive environment through the connection gap between the additive manufacturing head and the chamber during the movement of the additive manufacturing head. This better ensures the sealing and stability of the additive environment, helps maintain the water and oxygen content inside the chamber, and improves the quality of additive manufacturing.

[0015] Preferably, the sliding seal includes a sealing sleeve and a second sealing ring. The sealing sleeve is sealed and fixedly connected to the housing. The additive manufacturing head passes through the sealing sleeve. The second sealing ring is fixedly sleeved on the additive manufacturing head and can slide against the inner wall of the sealing sleeve to form a sliding seal between the additive manufacturing head and the housing.

[0016] By adopting the above technical solution, during the up-and-down movement of the additive processing head, the second sealing ring can slide against the inner wall of the sealing sleeve to achieve a sliding seal between the additive processing head and the cabin, preventing leakage of air between the cabin and the outside through the connection between the additive processing head and the cabin when the additive processing head moves, thus ensuring the airtightness of the additive environment.

[0017] Preferably, there are two second sealing rings, which are spaced apart along the sliding direction of the additive manufacturing head.

[0018] By adopting the above technical solution, two second sealing rings that are spaced apart along the sliding direction of the additive manufacturing head slide against the inner wall of the sealing sleeve, which can further reduce the interaction between the internal and external environments during additive manufacturing and better ensure the water and oxygen content inside the chamber.

[0019] Preferably, the guide column and the cabin are fixedly connected by a support, and the fixing block can be attached to the support so that the support can support the additive manufacturing head in the working state.

[0020] By adopting the above technical solution, the guide column and the cabin are fixedly connected through the support part, so that the fixing block can be attached to the support part, which can support the additive processing head in the working state and improve the stability of the additive processing head when it is working.

[0021] This application also provides a desktop titanium alloy additive manufacturing equipment with the following technical solution: A desktop titanium alloy additive manufacturing equipment, using the aforementioned sealed structure, further includes a chamber, a spatial movement mechanism, an additive manufacturing head, and a feeding mechanism. The spatial movement mechanism is located inside the chamber and connected to a printing substrate. The feeding mechanism is connected to the additive manufacturing head to deliver additive materials to the additive manufacturing head.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The drive mechanism drives the end of the additive manufacturing head to retract into the sealing cover, and the printed substrate seals the sealing opening, completely isolating the additive environment from the outside atmosphere, avoiding the influence of gaps in the wire feeding hole of the additive manufacturing head on vacuum operation, shortening the operation time of the additive vacuum environment, and improving the efficiency of additive environment generation; 2. The drive mechanism allows the additive manufacturing head to extend and retract, and combined with the printing substrate and sealing components to seal the opening, it improves the isolation effect between the additive manufacturing environment and the outside world. 3. The second sealing ring of the sliding seal slides into the inner wall of the sealing sleeve, reducing the interaction between the internal and external environments during additive manufacturing and stabilizing the water and oxygen content inside the chamber. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the sealing structure of a desktop titanium alloy additive manufacturing equipment and the structure of the additive manufacturing equipment according to an embodiment of this application.

[0024] Figure 2 This is a structural diagram used to demonstrate the sealing structure on the fixed plate.

[0025] Figure 3 It is a cross-sectional view used to show the sealing structure along the line connecting the middle of the two guide posts.

[0026] Figure 4 This is a schematic diagram illustrating the structure of the printed substrate sealing the cover.

[0027] Figure 5 yes Figure 4 Enlarged view of section A.

[0028] Figure 6 yes Figure 4 Enlarged view of section B in the middle.

[0029] Explanation of reference numerals in the attached drawings: 1. Cabin; 11. Additive manufacturing space; 12. Fixing plate; 2. Additive processing head; 3. Spatial movement mechanism; 4. Sealing cover; 41. Sealing port; 42. Mounting ring; 5. Drive mechanism; 51. Linear cylinder; 52. Fixing block; 53. Support part; 54. Guide column; 55. Linear bearing; 6. Seal; 61. First sealing ring; 62. Annular groove; 7. Printing substrate; 8. Sliding seal; 81. Sealing sleeve; 82. Second sealing ring; 83. Folded edge; 9. Feeding mechanism. Detailed Implementation

[0030] The following will be combined with the appendix Figures 1-6 The technical solutions in the embodiments of this utility model are described in further detail below. The described embodiments are only possible technical implementations of this utility model, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are also within the protection scope of this utility model.

[0031] This application mainly adopts a sealing structure and moving design for the additive processing head 2 to solve the problem of vacuum operation efficiency in the additive environment. It achieves the effect of avoiding the influence of gaps in the wire feeding hole of the additive processing head 2 and improving the generation efficiency of the additive environment. The following is a further detailed description of this application.

[0032] Reference Figure 1 , Figure 2 A sealing structure for a desktop titanium alloy additive manufacturing device includes a sealing cover 4, a drive mechanism 5, a sealing element 6, and a printing substrate 7.

[0033] In this embodiment, the additive processing head 2 is a welding torch; in other embodiments, the additive processing head 2 can also be a laser powder feeding head. The interior of the additive manufacturing equipment's chamber 1 forms a sealed space, which is used as the additive space 11. The additive manufacturing equipment is equipped with a matching vacuum generating device and a protective gas supply device. The vacuum generating device can use an air pump as its power source, connected to the additive space 11 within the chamber 1 via a pipe, to extract air from the additive space 11 and perform vacuum operation on the additive environment. Note that the vacuum in this application is not an absolute vacuum. Due to the special nature of titanium alloy processing, the vacuum level of the additive space 11 in this embodiment is selected as a high vacuum level (absolute pressure 10⁻¹~10⁻¹). 6 Pa (pressure difference ≈ 101.2~101.3 kPa). In this embodiment, the protective gas supplied to the additive space 11 in the protective gas supply equipment is argon, which provides protective gas for the additive operation of titanium alloy. The additive processing head 2 of the additive equipment is an arc additive processing head 2. After the welding wire is released from the reel, it is driven into the wire guide tube by the wire feed wheel, and then extends out through the wire feed hole inside the additive processing head 2.

[0034] The top wall panel of the cabin 1 is a fixed plate 12. The sealing cover 4 is sealed and fixedly connected to the fixed plate 12. The sealing cover 4 has a sealing port 41 that communicates with the additive space 11. The drive mechanism 5 is located on the outside of the fixed plate 12 and is connected to the additive processing head 2. The additive processing head 2 is inserted into the sealing cover 4. The drive mechanism 5 drives the end of the additive processing head 2 to pass through the sealing port 41 and extend into the additive space 11, and to retract into the sealing cover 4. The printing substrate 7 is connected to the spatial movement mechanism 3 of the additive equipment. The spatial movement mechanism 3 can drive the printing substrate 7 to move along the X, Y, and Z directions. The sealing element 6 is located at the end of the sealing cover 4 and forms a sealed connection through the compression of the printing substrate 7. When performing vacuum operation on the additive space 11, the drive mechanism 5 drives the end of the additive processing head 2 to retract into the sealing cover 4, and the space movement mechanism 3 drives the printing substrate 7 to abut against the sealing member 6 at the end of the sealing cover 4, sealing the sealing port 41 and isolating the additive space 11 from the external environment more thoroughly. This avoids the influence of the gap between the filament feeding hole of the additive processing head 2 and the filament on the vacuum operation of the additive environment, reduces the time required for the additive vacuum environment operation, and improves the efficiency of additive environment generation.

[0035] Reference Figure 2 The driving mechanism 5 includes, but is not limited to, one of a linear cylinder, a linear hydraulic cylinder, and a linear motor. In this embodiment, the driving mechanism 5 is preferably a linear cylinder 51. There are two linear cylinders 51, which are spaced apart. Each linear cylinder 51 is arranged in a vertical direction, so that the piston rod of the linear cylinder 51 slides in a vertical direction. The cylinder body of each linear cylinder 51 is fixedly mounted on the fixed plate 12. A fixed block 52 is fixedly mounted on the piston rod of the two linear cylinders 51. The additive processing head 2 is fixedly mounted on the fixed block 52, so that the two linear cylinders 51 drive the additive processing head 2 to move up and down through the fixed block 52, thereby improving the stability of the movement of the additive processing head 2.

[0036] Reference Figure 2 , Figure 3 To improve the stability of the additive manufacturing head 2 during additive manufacturing, two support portions 53 are fixedly provided on the outer wall of the fixing plate 12. The two support portions 53 are spaced apart. When the linear cylinder 51 drives the end of the additive manufacturing head 2 to extend out of the sealing cover and enter the additive manufacturing state, the fixing block 52 overlaps with the support portion 53, so that the support portion 53 supports the fixing block 52, thereby improving the stability of the additive manufacturing head 2 during operation. To improve the stability and accuracy of the sliding position of the additive manufacturing head 2, each support portion 53 is fixedly provided with a guide post 54 arranged vertically. The guide post 54 passes through the fixing block 52 vertically and is slidably connected to the fixing block 52 through a linear bearing 55, realizing low-resistance stable sliding of the additive manufacturing head 2 and ensuring the smoothness and accuracy of the movement of the additive manufacturing head 2.

[0037] Reference Figure 4 , Figure 5 The additive manufacturing head 2 is connected to the fixed plate 12 by a sliding seal 8. The sliding seal 8 includes a sealing sleeve 81 and a second sealing ring 82. The fixed plate 12 has a through hole that communicates with the sealing cover 4. The sealing sleeve 81 passes through the through hole and is fitted with the through hole with a clearance. The inner side wall of the sealing sleeve 81 is smooth. The end of the sealing sleeve 81 protrudes outward to form a folded edge 83 that overlaps the fixed plate 12. A rubber sealing gasket is provided between the folded edge 83 and the fixed plate 12 and is fixedly installed on the fixed plate 12 by bolts to form a sealed and fixed connection between the sealing sleeve 81 and the fixed plate 12.

[0038] The additive manufacturing head 2 is inserted into the sealing sleeve 81, and the second sealing ring 82 is fitted onto the housing of the additive manufacturing head 2. The second sealing ring 82 can be made of rubber. Specifically, there are two second sealing rings 82, which are spaced apart vertically. The inner ring of each second sealing ring 82 is embedded in the housing of the additive manufacturing head 2, and the outer ring slides against the inner wall of the sealing sleeve 81, forming a sliding sealing connection between the additive manufacturing head 2 and the sealing sleeve 81. This prevents leakage of air between the inside of the chamber 1 and the outside through the connection between the additive manufacturing head 2 and the chamber 1 when the additive manufacturing head 2 moves, ensuring the airtightness of the additive manufacturing environment.

[0039] Reference Figure 4 , Figure 6 The sealing cover 4 is a rotating body and is fixedly installed on the inner wall of the fixing plate 12. Specifically, the end of the sealing cover 4 closest to the fixing plate 12 protrudes outward in a circumferential direction to form a mounting ring 42. A rubber sealing gasket is provided between the mounting ring 42 and the fixing plate 12, and it is fixed to the fixing plate 12 by bolts, forming a sealed and fixed connection between the sealing cover 4 and the fixing plate 12. The sealing port 41 is located at the bottom end of the sealing cover. In this embodiment, the sealing element 6 is a first sealing ring 61, which is made of a high-temperature resistant material. The high-temperature resistant material in this embodiment includes, but is not limited to, one of fluororubber, silicone rubber, hydrogenated nitrile rubber, and polytetrafluoroethylene. The first sealing ring 61 is fixedly installed on the bottom end face of the sealing cover 4. Specifically, an annular groove 62 adapted to the first sealing ring 61 is provided on the bottom end face of the sealing cover 4. The annular groove 62 surrounds the sealing port 41. A part of the first sealing ring 61 is fixedly embedded in the annular groove 62, and another part protrudes from the annular groove 62. When the printing substrate 7 seals the sealing port 41, the printing substrate 7 squeezes the first sealing ring 61 to deform, thereby sealing the sealing port 41. This further enhances the isolation effect between the additive manufacturing environment and the outside world, ensuring that outside air will not enter the additive manufacturing environment through the sealing port 41 during the vacuuming process, and more effectively avoids the influence of the filament feeding hole of the additive manufacturing head 2 and the filament gap on the vacuum operation.

[0040] The principle of the sealing structure of a desktop titanium alloy additive manufacturing equipment according to an embodiment of this application is as follows: During the vacuum operation of the additive space 11 in the additive manufacturing equipment, the end of the additive processing head 2 is first driven by the linear cylinder 51 to retract into the sealing cover, and then the printing substrate 7 is driven by the spatial moving mechanism 3 to abut against the first sealing ring 61 at the end of the sealing cover, sealing the sealing opening 41, so that the additive space 11 is completely isolated from the external environment. Then, the vacuum space 11 is vacuumed by the vacuum generating equipment, thereby avoiding the influence of the gap between the wire feeding hole of the additive processing head 2 and the wire on the vacuum operation of the additive environment, reducing the time required for the additive vacuum environment operation, and improving the efficiency of additive environment generation.

[0041] After the vacuum operation is completed, argon gas is introduced into the additive space 11 through the protective gas supply equipment, so that the pressure in the additive space 11 is slightly higher than the atmospheric pressure. The space movement mechanism 3 drives the printing substrate 7 to move away from the sealing cover, and the linear cylinder 51 drives the additive processing head 2 to descend. The end of the additive processing head 2 extends out from the sealing port 41, so that the additive processing head 2 can perform additive operations on the printing substrate 7.

[0042] This application also discloses a desktop titanium alloy additive manufacturing device.

[0043] Reference Figure 1 A desktop titanium alloy additive manufacturing equipment, using the aforementioned sealed structure, further includes a chamber 1, a spatial movement mechanism 3, an additive processing head 2, and a feeding mechanism 9. The chamber 1 forms an additive space 11. The chamber 1, in conjunction with a door structure, allows for the opening and closing of the additive space 11, facilitating the unloading of products within the additive space 11. A printing substrate 7 is mounted on the spatial movement mechanism 3, which employs a screw and nut structure to drive the printing substrate 7 to move along the spatial coordinate axes X, Y, and Z, thereby enabling the spatial movement of the printing substrate 7 within the additive space 11.

[0044] The additive manufacturing head 2 is an arc welding gun, and the corresponding feeding mechanism 9 is a wire feeding mechanism. The wire feeding wheel in the wire feeding mechanism is driven to rotate by a motor, and uses friction to clamp the welding wire and push it forward. During the feeding process, the welding wire needs to pass through guide components such as the wire guide tube to ensure that it is accurately delivered to the arc action area along the predetermined path. When the welding wire is delivered to the arc action area in the welding gun, the high temperature generated by the arc melts the welding wire, and performs three-dimensional additive manufacturing on the workpiece.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sealing structure for a desktop titanium alloy additive manufacturing device, characterized in that: include: A sealing cover (4) is fixedly and sealed to the cabin (1) of the additive manufacturing equipment. A sealing port (41) communicating with the internal space of the cabin (1) is provided on the sealing cover (4). The end of the additive manufacturing head (2) can extend into the internal space of the cabin (1) through the sealing port (41). A drive mechanism (5) is provided outside the cabin (1) and connected to the additive processing head (2), and is capable of driving the additive processing head (2) to extend out of the sealing cover (4) and to be housed in the sealing cover (4); A sealing element (6) is disposed at the end of the sealing cover (4); The printing substrate (7) is connected to the spatial movement mechanism (3) of the additive manufacturing equipment and can abut against the sealing member (6) to form a seal on the sealing port (41).

2. The sealing structure of the desktop titanium alloy additive manufacturing equipment according to claim 1, characterized in that: A guide post (54) is fixedly provided on the cabin (1) of the additive manufacturing equipment. The guide post (54) is arranged along the sliding direction of the additive manufacturing head (2). A fixing block (52) is provided on the guide post (54) and is fixedly connected to the additive manufacturing head (2). The fixing block (52) is slidably connected to the guide post (54) through a linear bearing (55).

3. The sealing structure of the desktop titanium alloy additive manufacturing equipment according to claim 1, characterized in that: The sealing element (6) includes a first sealing ring (61), the sealing port (41) is located inside the first sealing ring (61), and one side of the first sealing ring (61) is sealed and fixedly connected to the sealing cover (4).

4. The sealing structure of the desktop titanium alloy additive manufacturing equipment according to claim 3, characterized in that: An annular groove (62) adapted to the first sealing ring (61) is provided on the end face of the additive processing head (2). A part of the first sealing ring (61) is fixedly embedded in the annular groove (62), and another part protrudes from the annular groove (62).

5. The sealing structure of the desktop titanium alloy additive manufacturing equipment according to claim 1, characterized in that: It also includes a sliding seal (8), through which the additive manufacturing head (2) and the cabin (1) are connected.

6. The sealing structure of the desktop titanium alloy additive manufacturing equipment according to claim 5, characterized in that: The sliding seal (8) includes a sealing sleeve (81) and a second sealing ring (82). The sealing sleeve (81) is sealed and fixedly connected to the cabin (1). The additive manufacturing head (2) passes through the sealing sleeve (81). The second sealing ring (82) is fixedly sleeved on the additive manufacturing head (2) and can slide against the inner wall of the sealing sleeve (81) to form a sliding seal between the additive manufacturing head (2) and the cabin (1).

7. The sealing structure of the desktop titanium alloy additive manufacturing equipment according to claim 6, characterized in that: The number of the second sealing rings (82) is two, and the two sealing rings are spaced apart along the sliding direction of the additive manufacturing head (2).

8. The sealing structure of the desktop titanium alloy additive manufacturing equipment according to claim 2, characterized in that: The guide post (54) is fixedly connected to the cabin (1) via a support (53), and the fixing block (52) can be attached to the support (53) so that the support (53) can support the additive manufacturing head (2) in the working state.

9. A desktop titanium alloy additive manufacturing device, using the sealing structure of the desktop titanium alloy additive manufacturing device according to any one of claims 1-8, characterized in that: It also includes a cabin (1), a spatial movement mechanism (3), an additive manufacturing head (2), and a feeding mechanism (9). The spatial movement mechanism (3) is located inside the cabin (1) and connected to the printing substrate (7). The feeding mechanism (9) is connected to the additive manufacturing head (2) to deliver additive materials to the additive manufacturing head (2).

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