Printing head assembly and lamination manufacturing equipment

Abstract

The utility model discloses a printing head assembly and lamination manufacturing equipment, which are mainly characterized in that a switching piece capable of moving among different switching positions is arranged, so that a feeding channel is communicated with different discharging channels, the different discharging channels can be replaced, and the spraying requirements of different stages can be met. According to the main technical scheme, the printing head assembly comprises a printing head body, and a feeding channel and at least two discharging channels are formed in the printing head body; a switching channel is formed in the switching piece, the position of the switching piece comprises at least two switching positions, and when the switching piece is located at the different switching positions, the feeding channel communicates with the different discharging channels through the switching channel; and the driving assembly is at least connected with the switching piece, and the driving assembly is used for driving the switching piece to move between different switching positions. The 3D printer is mainly used for 3D printing.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a print head assembly and a lamination manufacturing device. Background Art

[0002] In an FDM printer, the filament passes through the extruder and is introduced into the print head. During the printing process, the extruder pushes the filament into the print head, where it is heated and melted, and then ejected by the print head nozzle onto the print platform.

[0003] To balance print quality and speed, existing technologies employ nozzles with two or more apertures to switch between spraying consumables. Larger-aperture nozzles are used for wide-area spraying, while smaller-aperture nozzles are used for spraying fine details or on model surfaces. However, in existing technologies, nozzles of different apertures are mounted on different print heads, and switching between these nozzles is accomplished by driving different print heads. This results in the need to carry multiple print heads on the X-axis module, which places a heavy load on the drivers and occupies a large amount of space. Utility Model Content

[0004] In view of this, in order to solve at least one of the above-mentioned technical problems, embodiments of the present invention provide a print head assembly and a laminate manufacturing device.

[0005] In order to achieve the above-mentioned purpose, the present invention mainly provides the following technical solutions:

[0006] In one aspect, the present invention provides a print head assembly, comprising:

[0007] A print head body, wherein the print head body is provided with a feed channel and at least two discharge channels;

[0008] A switching member is provided with a switching channel, and the position of the switching member includes at least two switching positions. When the switching member is in different switching positions, the feed channel is connected to different discharge channels through the switching channel;

[0009] A driving assembly is connected to at least the switching member, and is used to drive the switching member to move between different switching positions.

[0010] On the other hand, the present invention further provides an additive manufacturing device comprising any one of the above-mentioned print head components.

[0011] The utility model proposes a print head assembly and laminated manufacturing equipment, which mainly provide a feed channel and multiple discharge channels on the print head body, and set a switching member that can move between different switching positions. By moving the switching member to different switching positions, the feed channel can be connected with different discharge channels, and then the consumables input from the feed channel can be squeezed out from the discharge channel connected to the feed channel, thereby realizing the replacement of the discharge of different discharge channels, which can meet the spraying needs of different stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic structural diagram of a print head assembly provided by an embodiment of the present utility model at a first viewing angle;

[0013] Figure 2 A schematic structural diagram of a print head assembly provided by an embodiment of the present utility model at a second viewing angle;

[0014] Figure 3 A schematic structural diagram of a print head assembly provided by an embodiment of the present utility model from a third viewing angle;

[0015] Figure 4 A schematic structural diagram of a print head assembly provided by an embodiment of the present utility model at a fourth viewing angle;

[0016] Figure 5 A schematic diagram of an exploded structure of a print head assembly provided by an embodiment of the present utility model;

[0017] Figure 6 A schematic cross-sectional view of a print head assembly provided by an embodiment of the present utility model;

[0018] Figure 7 This is a structural schematic diagram of a switching component in a print head assembly provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0019] To further illustrate the technical means and effects employed by the present invention to achieve its intended purpose, the following describes in detail the specific implementation, structure, features, and effects of the print head assembly according to the present invention, in conjunction with the accompanying drawings and preferred embodiments. The following embodiments and features may be combined with one another unless otherwise specified.

[0020] On the one hand, if Figure 1-6 As shown, the embodiment of the present invention provides a print head assembly, comprising:

[0021] The print head body 100 is provided with a feed channel 101 and at least two discharge channels 102;

[0022] The switching member 200 is provided with a switching channel. The switching member 200 has at least two switching positions. When the switching member 200 is in different switching positions, the feed channel 101 is connected to different discharge channels 102 through the switching channel.

[0023] The driving assembly 300 is connected to at least the switching member 200 , and is used to drive the switching member 200 to move between different switching positions.

[0024] The print head assembly can be used in 3D modeling equipment, which primarily includes a base, a frame unit such as a gantry or single cantilever, a print platform, and an X-axis unit. The print platform is connected to the base, the X-axis unit is connected to the frame unit, the print head assembly is connected to the X-axis unit, and the frame unit is connected to the base. This allows the print head assembly to be positioned above the print platform, allowing consumables to be sprayed onto the print platform.

[0025] The feed channel 101 can have various shapes and directions during use. For example, the feed channel 101 can be a cylindrical channel extending in a single direction. During use, the feed channel 101 has an opening at the top of the printhead body 100, and the consumables are introduced into the feed channel 101 from top to bottom. Alternatively, the feed channel 101 can be a curved channel. During use, the feed channel 101 has an opening on the side of the printhead body 100, and the consumables are introduced into the feed channel 101 at an angle, and the direction can be changed by the curved shape of the feed channel 101. The discharge channel 102 can also have various shapes, such as a cylindrical channel extending in a single direction or a curved channel. The number of discharge channels 102 can be set according to actual needs, such as two, three or even more. The discharge channels 102 can be exactly the same channels, so that when a single discharge channel 102 is blocked or cannot be used for other reasons, the discharge channel 102 can be replaced; or, the discharge channel 102 passes through the bottom end of the print head body 100 to form a bottom outlet 1021, and the bottom outlet 1021 is opposite to the printing platform. The discharge channel 102 sprays consumables from the bottom outlet 1021, and the inner diameter of the discharge material of the bottom outlet 1021 of different discharge channels 102 is different. For example, there can be two discharge channels 102, and the inner diameters of the bottom outlets 1021 of the two discharge channels 102 are 0.2 mm and 0.4 mm respectively, which can achieve different thicknesses of the sprayed consumables during spraying. It is possible to achieve large-area rapid spraying through the large-diameter bottom outlet 1021, saving printing time, or fine spraying through the small-diameter bottom outlet 1021, so that the model has better accuracy and a smoother surface. In an optional embodiment, the discharge channel 102 includes a lower area, a transition area, and an upper area, and the lower area, the transition area, and the upper area are arranged and connected away from the bottom outlet 1021 in sequence. The lower area extends to the bottom outlet 1021, the inner diameter of the lower area is consistent with the bottom outlet 1021, the inner diameter of the upper area is larger than the lower area, and the transition area is a conical area. When the molten consumable enters the lower area, the speed of the consumable is increased due to the tightening of the inner diameter of the channel, which can achieve rapid ejection of the consumables and avoid material breakage caused by insufficient consumables. The positional relationship of the discharge channels 102 can be various, so that when the switching member 200 moves, it can be connected to different discharge channels 102 accordingly.

[0026] In an optional embodiment, the number of the feed channel 101 and the switching channel are both one, which can realize the switching of a single consumable material being ejected from different discharge channels 102. Alternatively, in some other optional embodiments, the number of the feed channels 101 and the switching channels is the same, and both are multiple, the feed channels 101 and the switching channels are connected in a one-to-one correspondence, a single feed channel 101 and a switching channel correspond to at least two discharge channels 102, and different feed channels 101 correspond to different discharge channels 102, and different switching channels are used to connect with different discharge channels 102. Then, different consumables can be introduced into different feed channels 101, such as consumables of different colors or different materials, and then different consumables can be switched, and for any consumable, the caliber of the consumable ejection can be switched.

[0027] The utility model proposes a print head assembly and laminated manufacturing equipment, which mainly provide a feed channel and multiple discharge channels on the print head body, and set a switching member that can move between different switching positions. By moving the switching member to different switching positions, the feed channel can be connected with different discharge channels, and then the consumables input from the feed channel can be squeezed out from the discharge channel connected to the feed channel, thereby realizing the replacement of the discharge of different discharge channels, which can meet the spraying needs of different stages.

[0028] The switching member 200 can be moved in various ways, with the purpose of moving the switching channel and at least connecting the switching channel to different discharge channels 102. The following are three optional implementations. It is understood that the feasible implementations are not limited to the following examples:

[0029] First, the switching member 200 is used to rotate in a direction perpendicular to the axis of the feed channel 101 to move between different switching positions.

[0030] The switching member 200 is configured to rotate to move between different switching positions. The rotation axis of the switching member 200 is perpendicular to the axis of the feed channel 101. In other words, when in use, the rotation axis of the switching member 200 is horizontal. This movement makes the switching member 200 easier to drive, which will be further described below in conjunction with the embodiment of the drive assembly 300.

[0031] In an optional embodiment, the switching channel includes a converging channel 201 and at least two branch channels 202, and the branch channels 202 are connected to the converging channel 201. When the switching member 200 is in different switching positions, different branch channels 202 are connected to the feed channel 101, and the converging channel 201 is connected to different discharge channels 102.

[0032] For the convenience of description, the following text takes the example of two discharge channels 102. When there are more discharge channels 102, the following features are also applicable. The converging channel 201 and the two branch channels 202 form a trident hole, and the branch channels 202 are arranged in the rotation direction of the switching member 200. One end of the branch channel 202 away from the converging channel 201 passes through the outer wall of the switching member 200 to form a consumable access port. When the switching member 200 rotates, the consumable access port of the branch channel 202 is driven to move, and when the switching member 200 is in the switching position, one of the consumable access ports docks with the feed channel 101. The converging channel 201 is a single one, and the discharge channels 102 are arranged in the rotation direction of the switching member 200. One end of the converging channel 201 away from the branch channels 202 passes through the outer wall of the switching member 200 to form a consumable outlet. When the switching member 200 rotates, the consumable outlet of the converging channel 201 is driven to move, and when the switching member 200 is in the switching position, it docks with one of the discharge channels 102. More specifically, Figure 6 Taking the direction shown as an example, when the switching member 200 rotates clockwise, the consumables inlet of the branch channel 202 on the left approaches the feed channel 101 until it is completely docked with the feed channel 101, and the consumables outlet of the converging channel 201 moves toward the discharge channel 102 on the left until it is completely docked with the discharge channel 102 on the left, that is, Figure 6 When the right discharge channel 102 needs to be switched, the switching member 200 rotates counterclockwise, and the consumables inlet of the right branch channel 202 approaches the feed channel 101 until it is completely docked with the feed channel 101, while the consumables outlet of the converging channel 201 moves toward the right discharge channel 102 until it is completely docked with the right discharge channel 102, thus completing the switching of the discharge channel 102.

[0033] In an optional embodiment, as Figure 7 As shown, the consumables access ports of different branch channels 202 are independent to achieve better confinement of the consumables and prevent them from vibrating.

[0034] In an optional embodiment, as Figure 7 As shown, a guide ramp 2021 is provided at the edge of the consumables inlet. The guide ramp 2021 is inclined toward the outside of the branch channel 202 in a direction away from the collecting channel 201. The guide ramp 2021 is used to guide the consumables conveyed from the feed channel 101 into the consumables inlet, thereby allowing the consumables to smoothly enter the branch channel 202, thereby preventing the consumables from being stuck outside the consumables inlet due to positional error of the switching member 200, which causes the position of the consumables inlet and the feed channel 101 to deviate.

[0035] When the switching member 200 is in the switching position, the axial direction of the collecting channel 201 forms a preset angle with the axial direction of the feed channel 101 , and the side walls of the feed channel 101 and the collecting channel 201 correspond to each other in the axial direction of the feed channel 101 .

[0036] like Figure 6 As shown, the side walls of the feed channel 101 and the collecting channel 201 correspond to each other in the vertical direction, and the branch channel 202 on the left extends in an approximately vertical direction. After the consumables are vertically transmitted to the branch channel 202, they can first contact the inclined side walls of the collecting channel 201. The inclined side walls play a guiding role, allowing the consumables to smoothly pass through the inclined side walls of the collecting channel 201 and continue to slide along the collecting channel 201.

[0037] Secondly, the switching member 200 is used for linear movement to move between different switching positions.

[0038] Similar to the first embodiment, the switching channel may still include a converging channel 201 and at least two branch channels 202, which will not be described in detail here.

[0039] Thirdly, the switching member 200 is used to rotate in the axial direction of the feed channel 101 to move between different switching positions.

[0040] The switching member 200 is used to rotate to move between different switching positions. The rotating shaft of the switching member 200 can coincide with the axis of the feed channel 101, or in other words, when in use, the rotating shaft of the switching member 200 is a vertical rotating shaft. The first end of the switching channel is coaxially connected to the feed channel 101. When the switching member 200 moves, the first end of the switching channel remains stationary and only rotates in the original position. That is, the center of the opening of the first end of the switching channel is located on the rotating shaft of the switching member 200. When the switching member 200 is in different switching positions, the second end of the switching channel is connected to different discharge channels 102. That is, no point of the second end opening of the switching channel is on the rotating shaft of the switching member 200. If the extension shape of the switching channel from the first end to the second end is an S-shape with an approximately smooth transition, the arrangement of the discharge channel 102 can be set around the rotation axis of the switching member 200, and the distance between the discharge channel 102 and the rotation axis of the switching member 200 should be consistent.

[0041] In an optional embodiment, a movable cavity is opened on the print head body 100, the feed channel 101 and the discharge channel 102 are both connected to the movable cavity, at least part of the structure of the switching member 200 is located in the movable cavity, and the side wall of the switching member 200 is connected to the inner wall surface of the movable cavity.

[0042] The switching member 200 includes a partial structure of the switching channel located in the moving cavity. The shape of the moving cavity is determined according to the shape and movement mode of the switching member 200, and is intended to limit the switching member 200 and ensure the stable movement of the switching member 200 without affecting the movement of the switching member 200. For example, in an embodiment in which the switching member 200 rotates, the switching member 200 can be an approximate cylindrical structure, and the moving cavity is a cylindrical cavity. The outer wall of the switching member 200 slides against the inner wall of the moving cavity, thereby limiting the position of the switching member 200. Alternatively, in an embodiment in which the switching member 200 moves linearly, the switching member 200 can also be a cylinder or a cube, and the moving cavity can be an elongated cavity extending in the direction of movement of the switching member 200. The moving cavity limits the switching member 200 in the height direction in which the feed channel 101 extends, and makes way for the movement of the switching member 200 in the direction of movement of the switching member 200.

[0043] In an optional embodiment, a through-hole 103 is further provided on the print head body 100, and the through-hole 103 is connected to the movable cavity. The switching member 200 extends out of the movable cavity through a partial structure of the through-hole 103 and is connected to the driving assembly 300 to avoid occupying too much space on the print head body 100.

[0044] In an optional embodiment, the print head assembly further includes: a limiting member 500, which is connected to the print head body 100 and is used to limit a portion of the structure of the switching member 200 to the movable cavity.

[0045] The limiting member 500 can be in various forms and can limit the position of the switching member 200 in various ways. For example, when the switching member 200 rotates in a direction perpendicular to the axis of the feed channel 101, the switching member 200 is inserted into the movable cavity in an axial direction, and the limiting member 500 is used to limit the position of the switching member 200 in the axial direction of the switching member 200. An annular limiting groove extending in the circumferential direction of the switching member 200 can be provided on the switching member 200. The limiting member 500 is a limiting head, and the limiting member 500 is inserted into the limiting groove. The limiting member 500 does not affect the rotation of the switching member 200, but only interacts with the limiting groove to limit the axial movement of the switching member 200, thereby limiting part of the structure of the switching member 200 in the movable cavity.

[0046] Alternatively, it can be Figure 5 、 Figure 7As shown, a limiting boss 203 is provided on the switching member 200, and the switching member 200 is movably connected to the limiting member 500, and the limiting member 500 is connected to the limiting boss 203 to limit the switching member 200 to the movable cavity. The limiting member 500 plays a role similar to a sleeve, and plays a supporting and limiting role for the switching member 200. The limiting member 500 is sleeved on the switching member 200, and the switching member 200 can rotate circumferentially relative to the limiting member 500. The switching member 200 is installed in the movable cavity through the insertion port 103, and the limiting member 500 is connected to the print head body 100, which can be a threaded connection. The limiting member 500 limits the axial movement of the switching member 200 by abutting against the limiting boss 203 on the switching member 200, and then limits the switching member 200 in the movable cavity.

[0047] In an optional embodiment, the driving assembly 300 includes a power member 310 and a transmission assembly. The power member 310 is connected to the transmission assembly, and the transmission assembly is connected to the switching member 200. The power member 310 drives the switching member 200 to move through the transmission assembly.

[0048] The transmission assembly makes the position setting of the power member 310 more flexible, and allows the switching member 200 to have a different movement mode from the output end of the power member 310, such as the switching member 200 can move linearly, which is different from the rotational output of the power member 310. For another example, in an embodiment where the switching member 200 is used to rotate in a direction perpendicular to the extension direction of the feed channel 101, the axis of the switching member 200 extends horizontally and then extends out of the moving cavity from the aforementioned through-port 103. The power member 310 can be a motor, and the motor can be directly connected to the switching member 200, but the motor occupies too much space in the horizontal direction of the print head assembly, resulting in a limited moving position of the print head assembly. The setting position and direction of the power member 310 can be changed by the transmission assembly, thereby reducing the space occupied by the power member 310.

[0049] In an optional embodiment, the transmission assembly includes at least a gear 320 and a rack 330, one of the gear 320 and the rack 330 is connected to the switching member 200, the rack 330 is engaged with the gear 320, and the other of the rack 330 and the gear 320 is connected to the power member 310 to drive the rack 330 to move linearly.

[0050] For example, the gear 320 may be connected to the power member 310, and the rack 330 may be connected to the switching member 200; or the gear 320 may be connected to the switching member 200, and the power member 310 may be connected to the rack 330. In one embodiment, the connection between the gear 320 and the switching member 200 may be through a waist hole or an eccentric hole, and a screw hole may be provided on the switching member 200, and the switching member 200 and the gear 320 may be fastened by bolts, and then the gear 320 and the switching member 200 are positioned at the circumferential limit of the switching member 200. The power member 310 may be provided on the side of the print head body 100 or at a higher position, and then staggered with the print head body 100. Engaging teeth are provided on the side wall of the gear 320, and the rack 330 is engaged with the gear 320. The power member 310 is used to drive the rack 330 to move up and down, drive the gear 320 to rotate, and then drive the switching member 200 to rotate and move between different switching positions.

[0051] The power member 310 can be used to drive the rack 330 up and down in various ways. For example, the transmission assembly 320 can include a screw rod 340, a slider 350, and a guide support 360. The guide support 360 includes a guide rod extending in the same direction as the movement of the rack 330. The slider 350 and the guide rod are slidably connected. The slider 350 is threadedly connected to the screw rod 340. The screw rod 340 is connected to the power member 310, and the slider 350 is connected to the rack 330. The power member 310 is used to drive the screw rod 340 to rotate, which in turn drives the slider 350 to move along the guide rod through the pushing action of the thread, thereby driving the rack 330 to move up and down. The power member 310 can be fixed to the guide support 360, and the guide support 360 can be connected to the X-axis unit.

[0052] In another optional embodiment, the transmission assembly 320 further includes a transmission belt and a synchronous pulley, which is spaced apart from the output end of the power member 310. Both the synchronous pulley and the power member 310 can be connected to the X-axis unit. The transmission belt is wound around the synchronous pulley and the output end of the power member 310. The rack 330 is connected to the transmission belt. The power member 310 then drives the transmission belt to roll, thereby driving the rack 330 to move up and down. Alternatively, other implementations are possible.

[0053] In an optional embodiment, the print head assembly further includes: a sensor 410 and a trigger 420. One of the sensor 410 and the trigger 420 is connected to the transmission assembly. For example, the trigger 420 may be connected to the transmission assembly, thereby reducing the weight burden of the transmission assembly and preventing the electrical connection wires on the sensor 410 from obstructing movement. The at least two switching positions include a designated switching position. The trigger 420 is configured to trigger the sensor 410 to issue a switching signal when the switching member 200 moves to the designated switching position, and to stop triggering the sensor 410 when the switching member 200 moves to a non-designated switching position.

[0054] The triggering of the sensing member 410 and the triggering member 420 can determine which switching position the switching member 200 is in and whether the switching member 200 has successfully reached the switching position, that is, whether the switching of the discharge channel 102 is successful. In the embodiment with two switching positions, one of them is a designated switching position, such as Figure 6 In the embodiment, when the collecting channel 201 is connected to the discharge channel 102 on the right, the position of the switching member 200 is the designated switching position, and when the collecting channel 201 is connected to the discharge channel 102 on the left, the position of the switching member 200 is the non-designated switching position, that is, it moves to Figure 6 The trigger member 420 can be set on any component of the transmission assembly that moves synchronously with the switching member 200, such as the aforementioned rack 330 or slider 350. The induction member 410 can be fixed on the X-axis unit.

[0055] The induction member 410 and the trigger member 420 can be triggered in a variety of ways. For example, in an optional embodiment, the induction member 410 can be a Hall sensor, and the trigger member 420 can be a magnetic member. When the switching member 200 moves to the specified switching position, the magnetic member is located within the sensing range of the Hall sensor, and then triggers the Hall sensor to send a switching signal. When the switching member 200 moves to the specified non-switching position, the magnetic member is located outside the sensing range of the Hall sensor, and then stops triggering the Hall sensor, and the switching signal is interrupted. In another optional embodiment, Figure 1-4 As shown, the sensing member 410 may be a photoelectric switch, and the triggering member 420 may be a shielding member. When the switching member 200 moves to the designated switching position, the shielding member blocks the light of the photoelectric switch, thereby triggering the photoelectric switch to send a switching signal. When the switching member 200 moves to the designated non-switching position, the shielding member moves outside the light of the photoelectric switch, thereby stopping triggering the photoelectric switch, and the switching signal is interrupted. In another embodiment, the sensing member 410 may be a touch switch, and the triggering member 420 may be a contact. When the switching member 200 moves to the designated switching position, the contact squeezes the spring of the touch switch, thereby triggering the touch switch to send a switching signal. When the switching member 200 moves to the designated non-switching position, the contact disengages from the spring of the touch switch, thereby stopping triggering the touch switch, and the switching signal is interrupted.

[0056] In some optional implementations, such as Figure 3-5 As shown, a limiting protrusion 331 is also provided on the rack 330, and the limiting protrusion 331 is used to interact with the X-axis unit to limit the highest position or the lowest position of the rack 330 to prevent the rack 330 from moving excessively and disengaging from the gear 320.

[0057] In an optional embodiment, the print head body 100 includes at least a heating block 110 and at least two nozzles 120, the nozzle 120 is connected to the heating block 110, a feed channel 101 is opened on the heating block 110, and the discharge channel 102 includes at least a partial area of ​​the bottom outlet 1021 opened on the nozzle 120.

[0058] The discharge channel 102 can be entirely opened on the nozzle 120, and the top of the nozzle 120 needs to extend to the position where it docks with the switching member 200. Alternatively, it can be as follows Figure 6 As shown, the discharge channel 102 includes a first discharge sub-channel 1022 located on the heating block 110, and a second discharge sub-channel 1023 located on the nozzle 120, and the second discharge sub-channel 1023 includes a bottom outlet 1021. The heating block 110 is provided with a mounting hole, which is connected to the first discharge sub-channel 1022 on the heating block 110. The nozzle 120 is inserted into the mounting hole, and then the second discharge sub-channel 1023 on the nozzle 120 is docked with the first discharge sub-channel 1022. This can reduce the length of the nozzle 120 and avoid the position error between the nozzle 120 and the side wall of the movable chamber when the nozzle 120 is directly in contact with the switching member 200, which causes the switching member 200 to move unsmoothly.

[0059] The nozzles 120 may be independent of each other, or, in an optional embodiment, at least two nozzles 120 may be integrally formed to increase the installation convenience and position stability of the nozzles 120 .

[0060] In an optional embodiment, the first end of the nozzle 120 is used to spray the consumable material, and the nozzle 120 is plugged into the heating block 110 by the second end, such as being plugged into the aforementioned mounting hole. The nozzle 120 and the mounting hole can be an interference fit.

[0061] In an optional embodiment, the print head body 100 also includes a heating element 130, which is connected to the heating block 110. The heating element 130 is used to heat the heating block 110. The heating element 130 can be a ceramic heating plate, etc. The heating element 130 can be a plate-like structure, and the surface is attached to the heating block 110; or, it can be a ring-shaped or arc-shaped heating element 130, which can be set according to the shape of the heating block 110; or, the heating element 130 can also be inserted into the heating block 110.

[0062] In an optional embodiment, the print head body 100 further includes an outer cover 140, which is at least sleeved on the outside of the heating block 110, and the nozzle 120 extends out of the outer cover 140 through an opening at the bottom end of the outer cover 140. The heating element 130 can be fixed by the outer cover 140, and the outer cover 140 also serves to protect the heating element 130 and the heating block 110, and to prevent the risk of burns caused by accidentally touching the heating element 130 and the heating block 110.

[0063] In an optional embodiment, the print head body 100 further includes a throat pipe 150 , wherein the throat pipe 150 defines a throat channel 151 , the throat pipe 150 is connected to the heating block 110 , and the throat channel 151 is in communication with the feed channel 101 .

[0064] The connection between the throat pipe 150 and the heating block 110 can be plug-in, such as the throat pipe 150 is inserted into the feed channel 101 and has an interference fit with the feed channel 101.

[0065] In another aspect, the present invention further provides an additive manufacturing device comprising any of the above-mentioned print head assemblies. The advantages of any of the above-mentioned print head assemblies are not further described here.

[0066] The additive manufacturing equipment also includes a base, a frame unit, a printing platform, and an X-axis unit. The printing platform is connected to the base in a driving manner, the X-axis unit is connected to the frame unit in a driving manner, the print head assembly is connected to the X-axis unit in a driving manner, and the frame unit is connected to the base, so that the print head assembly is mounted above the printing platform, thereby spraying consumables onto the printing platform. The X-axis unit further includes an X-axis bracket, a drive unit, and a print head bracket. The X-axis bracket is connected to the frame unit in a driving manner, the drive unit is connected to the X-axis bracket, the print head bracket is slidably connected to the X-axis bracket, and is connected to the drive unit, and the drive unit is used to drive the print head bracket to slide along the X-axis bracket. The print head assembly is fixed to the print head bracket. If a heat sink is also connected to the print head bracket, the throat 150 is connected to the heat sink to thereby fix the print head body 100. The aforementioned sensor 410 and guide support 360 can be fixedly connected to the print head bracket by bolts.

[0067] In addition, the present invention also provides the following implementation methods:

[0068] Reference numeral 1. A print head assembly, comprising:

[0069] The print head body 100 is provided with a feed channel 101 and at least two discharge channels 102;

[0070] The switching member 200 has a switching channel formed thereon. The switching member 200 has at least two switching positions. When the switching member 200 is in different switching positions, the feed channel 101 is connected to different discharge channels 102 through the switching channel.

[0071] The driving assembly 300 is connected to at least the switching member 200 , and is used to drive the switching member 200 to move between different switching positions.

[0072] Reference numeral 2. The print head assembly according to reference numeral 1, wherein:

[0073] The discharge channel 102 ejects the consumable material from the bottom outlet 1021 , and the inner diameters of the bottom outlets 1021 of different discharge channels 102 are different.

[0074] Reference numeral 3. The print head assembly according to reference numeral 1, wherein:

[0075] The number of the feed channel 101 and the switching channel is one;

[0076] Alternatively, the number of the feed channels 101 and the switching channels is the same, and both are multiple, the feed channels 101 and the switching channels are connected one-to-one, and different switching channels are used to connect with different discharge channels 102.

[0077] Label 4. The print head assembly according to label 1, wherein:

[0078] The switching member 200 is used to rotate in a direction perpendicular to the axis of the feed channel 101 to move between different switching positions;

[0079] Alternatively, the switching member 200 is configured to move linearly to move between different switching positions.

[0080] 5. The print head assembly according to 4, wherein:

[0081] The switching channel includes a converging channel 201 and at least two branch channels 202. The branch channels 202 are connected to the converging channel 201. When the switching member 200 is in different switching positions, different branch channels 202 are connected to the feed channel 101, and the converging channel 201 is connected to different discharge channels 102.

[0082] Reference numeral 6. The print head assembly according to reference numeral 5, wherein:

[0083] One end of the branch channel 202 away from the converging channel 201 passes through the outer wall of the switching member 200 to form a consumable material access port. The consumable material access ports of different branch channels 202 are independent.

[0084] A guide slope 2021 is provided at the edge of the consumable material inlet, and the guide slope 2021 is inclined toward the outside of the branch channel 202 in the direction away from the converging channel 201 .

[0085] Reference numeral 7. The print head assembly according to reference numeral 1, wherein:

[0086] When the switching member 200 is located at the switching position, the axial direction of the collecting channel 201 and the axial direction of the feeding channel 101 form a preset angle.

[0087] Reference numeral 8. The print head assembly according to reference numeral 1, wherein:

[0088] The switching member 200 is used to rotate in the axial direction of the feed channel 101 to move between different switching positions.

[0089] Reference numeral 9. The print head assembly according to reference numeral 8, wherein:

[0090] The first end of the switching channel is coaxially connected to the feed channel 101 , and the second end of the switching channel is connected to different discharge channels 102 when the switching member 200 is in different switching positions.

[0091] Label 10. The print head assembly according to label 1, wherein:

[0092] The print head body 100 is provided with a movable cavity, the feed channel 101 and the discharge channel 102 are both connected to the movable cavity, at least part of the switching member 200 is located in the movable cavity, and the side wall of the switching member 200 is connected to the inner wall of the movable cavity.

[0093] Reference numeral 11. The print head assembly according to reference numeral 10, wherein:

[0094] The print head body 100 is further provided with a through port 103 , which is in communication with the movable cavity. Part of the structure of the switching member 200 extends out of the movable cavity through the through port 103 and is driven by the driving assembly 300 .

[0095] Reference numeral 12. The print head assembly according to reference numeral 11, wherein the print head assembly further comprises:

[0096] The limiting member 500 is connected to the print head body 100 and is used to limit a portion of the structure of the switching member 200 within the movable cavity;

[0097] A limiting boss 203 is provided on the switching member 200 . The switching member 200 is movably connected to the limiting member 500 . The limiting member 500 is connected to the limiting boss 203 to limit the switching member 200 in the moving cavity.

[0098] Label 13. The print head assembly according to label 1, wherein:

[0099] The driving assembly 300 includes a power member 310 and a transmission assembly. The power member 310 is connected to the transmission assembly, and the transmission assembly is connected to the switching member 200. The power member 310 drives the switching member 200 to move through the transmission assembly.

[0100] Label 14. The print head assembly according to label 13, wherein:

[0101] The transmission assembly includes at least a gear 320 and a rack 330 , one of which is connected to the switching member 200 , the rack 330 meshing with the gear 320 , and the other of which is connected to the power member 310 to drive the rack 330 to move linearly;

[0102] The transmission assembly 320 further includes a screw rod 340, a slider 350, and a guide support 360. The guide support 360 includes a guide rod extending in the same direction as the movement direction of the rack 330. The slider 350 and the guide rod are slidably connected. The slider 350 is threadedly connected to the screw rod 340. The screw rod 340 is connected to the power member 310. The slider 350 is connected to the rack 330.

[0103] Alternatively, the transmission assembly 320 further includes a transmission belt and a synchronous wheel, the synchronous wheel is spaced apart from the output end of the power member 310, the transmission belt is wound around the synchronous wheel and the output end of the power member 310, and the rack 330 is connected to the transmission belt.

[0104] Reference numeral 15. The print head assembly according to reference numeral 13, wherein the print head assembly further comprises:

[0105] The sensing member 410 and the trigger member 420, one of which is connected to the transmission component, and the at least two switching positions include a designated switching position. The trigger member 420 is used to trigger the sensing member 410 to send a switching signal when the switching member 200 moves to the designated switching position, and stop triggering the sensing member 410 when the switching member 200 moves to the non-designated switching position.

[0106] Reference number 16. The print head assembly according to reference number 1, wherein:

[0107] The print head body 100 includes at least a heating block 110 and at least two nozzles 120 . The nozzles 120 are connected to the heating block 110 . A feed channel 101 is provided on the heating block 110 . The discharge channel 102 includes at least a portion of a bottom outlet 1021 provided on the nozzle 120 .

[0108] 17. The print head assembly according to 16, wherein:

[0109] At least two nozzles 120 are integrally formed.

[0110] 18. The print head assembly according to 16, wherein:

[0111] The first end of the nozzle 120 is used to eject the consumable material, and the second end of the nozzle 120 is plugged into the heating block 110;

[0112] And / or, the print head body 100 further includes a heating element 130 , the heating element 130 is connected to the heating block 110 , and the heating element 130 is used to heat the heating block 110 ;

[0113] And / or, the print head body 100 further includes an outer cover 140 , the outer cover 140 is at least sleeved on the outside of the heating block 110 , and the nozzle 120 extends from the bottom opening of the outer cover 140 to the outside of the outer cover 140 ;

[0114] And / or, the print head body 100 further includes a throat pipe 150 , the throat pipe 150 defines a throat pipe channel 151 , the throat pipe 150 is connected to the heating block 110 , and the throat pipe channel 151 is in communication with the feed channel 101 .

[0115] Label 19. A laminate manufacturing device, comprising the print head assembly of any one of the above labels 1-18.

[0116] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A print head assembly, characterized in that: include: A print head body, wherein the print head body is provided with a feed channel and at least two discharge channels; A switching member, wherein a switching channel is formed on the switching member, and the position of the switching member includes at least two switching positions. When the switching member is in different switching positions, the feed channel is connected to different discharge channels through the switching channel; A driving assembly is connected to at least the switching member, and the driving assembly is used to drive the switching member to move between different switching positions.

2. The print head assembly according to claim 1, wherein: The discharge channel ejects consumables from the bottom outlet, and the inner diameters of the bottom outlets of different discharge channels are different.

3. The print head assembly according to claim 1, wherein: The number of the feed channel and the number of the switching channel are both one; Alternatively, the number of the feed channels and the switching channels is the same, and both are multiple, the feed channels and the switching channels are connected in a one-to-one correspondence, and different switching channels are used to connect with different discharge channels.

4. The print head assembly according to claim 1, wherein: The switching member is used to rotate in a direction perpendicular to the axis of the feed channel to move between different switching positions; Alternatively, the switching member is configured to move linearly to move between the different switching positions.

5. The print head assembly according to claim 4, wherein: The switching channel includes a converging channel and at least two branch channels, the branch channels are connected to the converging channel, and when the switching member is in different switching positions, different branch channels are connected to the feed channel, and the converging channel is connected to different discharge channels.

6. The print head assembly according to claim 5, wherein: One end of the branch channel away from the collecting channel passes through the outer wall of the switching member to form a consumables access port, and the consumables access ports of different branch channels are independent; A guide slope is provided at the edge of the consumable material inlet, and the guide slope is inclined toward the outside of the branch channel in a direction away from the converging channel.

7. The print head assembly according to claim 5, wherein: When the switching member is located at the switching position, the axial direction of the collecting channel and the axial direction of the feeding channel form a preset angle.

8. The print head assembly according to claim 1, wherein: The switching member is used to rotate in the axial direction of the feed channel to move between different switching positions.

9. The print head assembly according to claim 8, wherein: The first end of the switching channel is coaxially connected to the feed channel, and when the switching member is in different switching positions, the second end of the switching channel is connected to different discharge channels.

10. The print head assembly according to claim 1, wherein: A movable cavity is provided on the print head body, the feed channel and the discharge channel are both connected to the movable cavity, at least part of the structure of the switching member is located in the movable cavity, and the side wall of the switching member is connected to the inner wall surface of the movable cavity.

11. The print head assembly according to claim 10, wherein: The print head body is further provided with a through-interface, which is in communication with the movable cavity. Part of the structure of the switching element extends out of the movable cavity through the through-interface and is driven by the driving assembly.

12. The print head assembly according to claim 11, wherein: The print head assembly further comprises: a limiting member connected to the print head body, and configured to limit a portion of the switching member within the movable cavity; A limiting boss is provided on the switching member, the switching member is movably connected to the limiting member, and the limiting member is connected to the limiting boss to limit the switching member in the movable cavity.

13. The print head assembly according to claim 1, wherein: The driving assembly includes a power member and a transmission assembly. The power member is connected to the transmission assembly, and the transmission assembly is connected to the switching member. The power member drives the switching member to move through the transmission assembly.

14. The print head assembly according to claim 13, wherein: The transmission assembly includes at least a gear and a rack, one of the gear and the rack is connected to the switching member, the rack is meshed with the gear, and the other of the rack and the gear is connected to the power member to drive the rack to move linearly; The transmission assembly further includes a screw, a slider and a guide support, the guide support includes a guide rod extending in the same direction as the moving direction of the rack, the slider and the guide rod are slidably connected, the slider is threadedly connected to the screw, the screw is connected to the power member, and the slider is connected to the rack; Alternatively, the transmission assembly further includes a transmission belt and a synchronous wheel, the synchronous wheel is spaced apart from the output end of the power member, the transmission belt is wound around the synchronous wheel and the output end of the power member, and the rack is connected to the transmission belt.

15. The print head assembly according to claim 13, wherein: The print head assembly further comprises: A sensing member and a triggering member, one of the sensing member and the triggering member is connected to the transmission assembly, at least two of the switching positions include a designated switching position, and the triggering member is used to trigger the sensing member to send a switching signal when the switching member moves to the designated switching position, and stop triggering the sensing member when the switching member moves to a position other than the designated switching position.

16. The print head assembly according to claim 1, wherein: The print head body comprises at least a heating block and at least two nozzles, the nozzles are connected to the heating block, a feed channel is provided on the heating block, and the discharge channel comprises at least a portion of the bottom outlet area provided on the nozzles.

17. The print head assembly according to claim 16, wherein: At least two of the nozzles are integrally formed.

18. The print head assembly according to claim 16, wherein: The first end of the nozzle is used to eject the consumable material, and the second end of the nozzle is plugged into the heating block; And / or, the print head body further comprises a heating element, the heating element is connected to the heating block, and the heating element is used to heat the heating block; And / or, the print head body further comprises an outer cover, the outer cover at least being sleeved on the outside of the heating block, and the nozzle extending out of the outer cover from the bottom opening of the outer cover; And / or, the print head body further comprises a throat tube, the throat tube is provided with a throat tube channel, the throat tube is connected to the heating block, and the throat tube channel is communicated with the feed channel.

19. An additive manufacturing device, characterized in that: A print head assembly comprising any one of claims 1-18.

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