Spray head suite, 3D printing equipment and 3D printing method

Abstract

The embodiment of the invention provides a spray head kit, 3D printing equipment and a 3D printing method. The spray head assembly is constructed to be capable of being driven to move in a force application direction, and the spray head assembly comprises a support, a spray nozzle assembly and a sensor. The nozzle assembly is connected with the support and is configured to be driven by external force to move in the force application direction. The sensor is connected with the support and / or the nozzle assembly and used for sensing displacement and / or deformation of the nozzle assembly. The 3D printing equipment comprises a 3D printing main body and the spray head suite, and the spray head suite is connected with the 3D printing main body.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and in particular to a nozzle kit, a 3D printing device, and a 3D printing method. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses digital model files as the basis, and uses special wax materials, powdered metals or plastics and other bondable materials to print layers of materials to create three-dimensional objects. Fused deposition modeling technology is one of the main 3D printing technologies. This technology heats and melts the hot-melt filament, extrudes it from the nozzle, and deposits it on the molding platform or the previous layer of solidified material to finally generate a physical object. During the printing process, the consumables are extruded from the nozzle. The position accuracy of the nozzle is directly related to the accuracy of 3D printing. In order to ensure the accuracy of 3D printing, it is usually necessary to calibrate or determine the position of the nozzle. Driving the nozzle to contact with an external structure (such as a machine or molding platform) is a common practice for calibrating or determining the nozzle position, but how to timely determine the contact time between the nozzle and the external structure is something that technicians in this field need to consider. Summary of the invention

[0003] In order to solve the problems in the prior art, the embodiments of the present application provide a nozzle kit, a 3D printing device, and a 3D printing method.

[0004] The embodiment of the present application provides a nozzle assembly, which is configured to be driven to move along a force application direction, and the nozzle assembly includes: Bracket; a nozzle assembly connected to the bracket and configured to be movable along the force application direction when driven by an external force; A sensor is connected to the bracket and / or the nozzle assembly and is used to sense the displacement and / or deformation of the nozzle assembly.

[0005] In one embodiment, the nozzle assembly includes a heat dissipation portion and a nozzle portion, and the heat dissipation portion includes: A heat dissipation body, which is used to connect the nozzle part; A connecting arm connecting the heat dissipation body and the bracket; Wherein, the sensor is arranged on the connecting arm and is used for sensing the deformation of the connecting arm.

[0006] In one embodiment, the connecting arm comprises: A connecting portion connected to the bracket; A bending portion connecting the connecting portion and the heat dissipation body; Wherein, the sensor is arranged at the bending portion, and an extending direction of the bending portion intersects with the force application direction.

[0007] In one embodiment, the heat dissipation body is configured to extend along the force application direction; The connecting portion is configured to extend along the force-applying direction, and the bending portion is disposed on a side of the connecting portion close to the nozzle portion along the force-applying direction; The connecting arm is arranged at one side of the heat dissipation body along the sliding direction, and the bending portion is arranged between the heat dissipation body and the connecting portion along the sliding direction; The sliding direction intersects with the force application direction, and the extending direction of the bent portion is between the sliding direction and the force application direction.

[0008] In one embodiment, the bracket is provided with a first mounting hole penetrating therethrough along a sliding direction; The connecting portion is provided with a second mounting hole penetrating therethrough along the sliding direction; The heat dissipation body is provided with a third mounting hole penetrating therethrough along the sliding direction; The nozzle kit further includes a fixing bolt, which is arranged at the first mounting hole, the second mounting hole and the third mounting hole along the sliding direction, and the outer diameter of the fixing bolt is smaller than the inner diameter of the third mounting hole.

[0009] In one embodiment, the nozzle assembly includes a heat dissipation portion and a nozzle portion, and the heat dissipation portion includes: A heat dissipation body, which is used to connect the nozzle part; A slide, which is arranged at the end of the heat dissipation body along the force application direction and is slidably connected to the bracket; Wherein, the sensor is arranged between the slide and the bracket, and is used to sense the displacement of the nozzle assembly.

[0010] In one embodiment, the sensor is connected to the bracket and is in detachable contact with the slide, or the sensor is connected to the slide and is in detachable contact with the bracket.

[0011] In one embodiment, the bracket includes: A plate body portion, which is arranged side by side with the nozzle assembly along the force application direction; A sliding portion connected to the plate body and protruding along a sliding direction, wherein the sliding direction intersects with the force application direction; The nozzle assembly is arranged at one side of the sliding part along the force application direction, the slide table and the sliding part are staggered and slidably connected along the force application direction, and the sensor is arranged between the slide table and the sliding part.

[0012] In one embodiment, the nozzle assembly comprises: A heat dissipation portion, which is used to be connected to the bracket; a nozzle portion connected to the heat dissipation portion and disposed on a side of the heat dissipation portion away from the bracket along the force application direction; Wherein, the sensor is arranged between the heat dissipation part and the nozzle part, and is used for sensing the displacement of the nozzle assembly.

[0013] In one embodiment, the nozzle assembly further comprises: A spacer sleeve connected to the nozzle portion; A connecting column connecting the isolation sleeve and the heat dissipation portion; Among them, the connecting column is movably connected to the isolation sleeve, and the connection between the connecting column and the isolation sleeve has a gap with variable width along the force application direction. The sensor is arranged in the gap and is detachably in contact with the isolation sleeve and / or the connecting column for sensing the displacement of the nozzle assembly.

[0014] An embodiment of the present application further provides a 3D printing device, which includes a 3D printing body and a nozzle kit as described in any one of the aforementioned embodiments, wherein the nozzle kit is connected to the 3D printing body.

[0015] In one embodiment, the 3D printing body includes a molding platform, the nozzle kit is adjustable relative to the molding platform, and the extension direction of the bending portion of the nozzle assembly intersects with the extension direction of the plane where the molding platform is located and is set at an angle.

[0016] In one embodiment, the present application also provides a 3D printing method, which is implemented by the 3D printing device, and the 3D printing method includes the following steps: Select File to Print; Obtain the coordinates of the lower and upper regions of the model according to the file to be printed; Leveling, obtaining the inclination angle of the forming platform of the 3D printing body in the side viewing direction and the sliding direction; Printing starts.

[0017] Furthermore, the nozzle kit, 3D printing device, and 3D printing method provided in the embodiments of the present application, wherein the nozzle kit is constructed to be driven to move along a force direction, and is used to interfere with an external structure to calibrate or position the nozzle kit. The nozzle assembly is connected to the bracket, and is constructed to be driven by an external force to move along the force direction, that is, when calibrating or positioning the nozzle assembly that can extrude consumables, the nozzle assembly can be squeezed and deformed along the force direction or move relative to the bracket to produce displacement. The sensor is connected to the bracket and / or the nozzle assembly, and is used to sense the displacement and / or deformation of the nozzle assembly, thereby recording the time when the nozzle kit is in contact with the external structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional schematic diagram of the nozzle kit provided in an embodiment of the present application.

[0019] Figure 2 A partial cross-sectional schematic diagram of a nozzle kit provided in one embodiment of the present application.

[0020] Figure 3 A partial three-dimensional schematic diagram of a nozzle assembly of a spray head kit provided in one embodiment of the present application.

[0021] Figure 4 A partial cross-sectional schematic diagram of a nozzle kit provided in another embodiment of the present application.

[0022] Figure 5 A partial stereoscopic schematic diagram of a nozzle kit provided in another embodiment of the present application.

[0023] Figure 6 A schematic cross-sectional view of a nozzle kit provided in yet another embodiment of the present application.

[0024] Figure 7 A cross-sectional schematic diagram of a nozzle kit provided in yet another embodiment of the present application.

[0025] Figure 8 A schematic diagram of a 3D printing device provided in an embodiment of the present application.

[0026] Main component symbols Nozzle Kit 10 Transmission channel 100 Bracket 11 Plate body 111 First mounting hole 1110 Sliding portion 112 Chute 1120 Accommodation slot 113 Nozzle assembly 12 Heat dissipation unit 121 Heat dissipation body 1211 The third mounting hole 12110 Heat dissipation blade 1212 Slide 1213 Boss 12131 Connecting arm 1214 Second mounting hole 12140 Connection 12141 Bending part 12142 Nozzle section 122 Isolation sleeve 123 Part 1231 Part II 1232 Mounting cavity 1233 Gap 1234 Connecting column 124 Column 1241 Cap body 1242 Ring 1243 Sensor 13 Fixing bolt 14 Extrusion components 15 Extrusion drive unit 151 3D printing equipment1 3D printed body 19 Forming platform 191 X-axis drive assembly 192 Gantry 193 Force direction Z Slide direction Y Side view direction X The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0027] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be interpreted as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components. The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to also include plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or their groups. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as those generally understood by ordinary technicians in the field to which the present application belongs. Furthermore, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the relevant art and the content of this application, and will not be interpreted as idealized or overly formal meanings.

[0028] Generally, 3D printing technology is a rapid prototyping technology that uses digital model files as the basis, and uses special wax materials, powdered metals or plastics and other bondable materials to print layers of materials to create three-dimensional objects. Fused deposition modeling technology is one of the main 3D printing technologies. This technology heats and melts the hot-melt filament, extrudes it from the nozzle, and deposits it on the molding platform or the previous layer of solidified material to finally generate a physical object. During the printing process, the consumables are extruded from the nozzle. The position accuracy of the nozzle is directly related to the accuracy of 3D printing. In order to ensure the accuracy of 3D printing, it is usually necessary to calibrate or determine the position of the nozzle. Driving the nozzle to contact with an external structure (such as a machine or molding platform) is a common practice for calibrating or determining the nozzle position, but how to timely determine the contact time between the nozzle and the external structure is something that technicians in this field need to consider.

[0029] Correspondingly, the embodiments of the present application provide a nozzle kit and a 3D printing device. The nozzle kit is configured to be driven to move along a force direction, and the nozzle kit includes a bracket, a nozzle assembly and a sensor; the nozzle assembly is connected to the bracket and is configured to be driven by an external force to move relative to the bracket along the force direction; the sensor is connected to the bracket and / or the nozzle assembly, and is used to sense the displacement and / or deformation of the nozzle assembly. The 3D printing device includes a 3D printing body and the nozzle kit, and the nozzle kit is connected to the 3D printing body.

[0030] Furthermore, the nozzle kit, 3D printing device, and 3D printing method provided by the embodiments of the present application, wherein the nozzle kit is constructed to be driven to move along a force direction, and is used to interfere with an external structure to calibrate or determine the position of the nozzle kit. The nozzle assembly is connected to the bracket, and is constructed to be driven by an external force to move along the force direction, that is, when calibrating or determining the position of the nozzle assembly that can extrude consumables, the nozzle assembly can be squeezed and deformed along the force direction or move relative to the bracket to produce displacement. The sensor is connected to the bracket and / or the nozzle assembly, and is used to sense the displacement and / or deformation of the nozzle assembly, thereby recording the time when the nozzle kit is in contact with the external structure.

[0031] Those skilled in the art can understand that "3D printing" refers to a technology that uses a digital model file as the basis, and uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer.

[0032] The following will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0033] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 3 As shown, the embodiment of the present application provides a nozzle kit 10, which is configured to be driven to move along a force direction Z. The nozzle kit 10 includes a bracket 11, a nozzle assembly 12 and a sensor 13; the nozzle assembly 12 is connected to the bracket 11, and is configured to be driven by an external force to move along the force direction Z relative to the bracket 11; the sensor 13 is connected to the bracket 11 and / or the nozzle assembly 12, and is used to sense the displacement and / or deformation of the nozzle assembly 12.

[0035] Furthermore, the nozzle kit 10 provided in the embodiment of the present application is constructed to be driven to move along a force direction Z, so as to interfere with an external structure to calibrate or determine the position of the nozzle kit 10. The nozzle assembly 12 is connected to the bracket 11, and is constructed to be driven by an external force to move along the force direction Z relative to the bracket 11, that is, when calibrating or determining the position of the nozzle assembly 12 capable of extruding consumables, the nozzle assembly 12 can be squeezed and deformed along the force direction Z or move and displace compared to the bracket 11. The sensor 13 is connected to the bracket 11 and / or the nozzle assembly 12, and is used to sense the displacement and / or deformation of the nozzle assembly 12, so as to record the time when the nozzle kit 10 contacts the external structure.

[0036] In one embodiment, for ease of understanding, the side viewing direction X, sliding direction Y and force direction Z are introduced for description in the embodiment of the present application. The side viewing direction X, sliding direction Y and force direction Z are three non-parallel directions in the spatial coordinate system; in subsequent embodiments, the side viewing direction X, sliding direction Y and force direction Z are taken as examples of three mutually perpendicular reference directions in the three-dimensional Cartesian coordinate system for description. The directions shown in the embodiments of the present application are used to help understand the relative positional relationship of each component, but their specific directions are not limited.

[0037] In one embodiment, the bracket 11 includes a plate body 111 and a sliding portion 112, and the plate body 111 is connected to the sliding portion 112. The plate body 111 is generally plate-shaped, the width direction of the plate body 111 corresponds to the side view direction X, the thickness direction of the plate body 111 corresponds to the sliding direction Y, and the length direction of the plate body 111 corresponds to the force direction Z. The sliding portion 112 is located at one side of the plate body 111 along the sliding direction Y and is convexly arranged, and the sliding portion 112 and the plate body 111 form a generally angled structure, and the heat dissipation portion 121 is configured to be located in the angled structure.

[0038] In one embodiment, the nozzle kit 10 may further include an extrusion assembly 15 connected to the bracket 11, and the extrusion assembly 15 and the nozzle assembly 12 cooperate with each other to complete the extrusion of the consumables. The extrusion assembly 15 and the nozzle assembly 12 are respectively located on two opposite sides of the sliding portion 112 along the force direction Z, and the extrusion assembly 15 is carried by the sliding portion 112 along the force direction Z. The nozzle assembly 12 is arranged on the other side of the sliding portion 112 along the force direction Z and is connected to the plate body 111 and the heat dissipation portion 121 at the same time, so as to improve the connection strength of the nozzle assembly 12, and when the nozzle assembly 12 is against the external structure along the force direction Z, the position of the nozzle assembly 12 itself is prevented from being offset.

[0039] In one embodiment, the extrusion assembly 15 is disposed upstream of the transmission channel 100, and is used to clamp the consumables and push the consumables to the nozzle assembly 12. The extrusion assembly 15 includes an extrusion drive unit 151 and an extrusion wheel set (not shown). The extrusion drive unit 151 is used to generate a rotational torque, which can be a drive motor, and the extrusion wheel set includes at least a driving wheel and a driven wheel. The driving wheel is drivingly connected to the extrusion drive unit 151, and the driven wheel is drivingly connected to the driving wheel. A plurality of the driving wheels and / or a plurality of the driven wheels cooperate with each other to clamp and push the consumables.

[0040] In one embodiment, the nozzle assembly 12 is disposed downstream of the transmission channel 100, and is used to perform heat treatment on the consumables, so that the consumables are melted and extruded to achieve 3D printing. The nozzle assembly 12 includes a heat dissipation portion 121 and a nozzle portion 122, the heat dissipation portion 121 is detachably connected to the bracket 11, and the nozzle portion 122 is connected to the heat dissipation portion 121. The nozzle portion 122 is used to heat part of the consumables and melt the consumables and extrude them, and the heat dissipation portion 121 is used to dissipate heat from part of the consumables to prevent the consumables from melting in advance and causing blockage.

[0041] In this embodiment, the heat dissipation part 121 includes a heat dissipation body 1211, heat dissipation blades 1212, a slide 1213 and a connecting arm 1214, and the heat dissipation blades 1212, the slide 1213 and the connecting arm 1214 are respectively connected to the heat dissipation body 1211. The heat dissipation body 1211 is the main bearing structure of the heat dissipation part 121. The heat dissipation body 1211 is constructed as a block with a certain thickness along the sliding direction Y, and the transmission channel 100 is arranged through the heat dissipation body 1211 along the force application direction Z. The heat dissipation blades 1212 are used to increase the surface area of ​​the heat dissipation part 121 to enhance the heat dissipation effect. The heat dissipation blades 1212 are constructed as thin sheets. A plurality of heat dissipation blades 1212 are respectively arranged on opposite sides of the heat dissipation body 1211 along the sliding direction Y and extend in a direction away from the heat dissipation body 1211.

[0042] In this embodiment, the slide 1213 is disposed at one end of the heat dissipation body 1211 close to the sliding portion 112 along the force direction Z. The slide 1213 has a step structure protruding toward both sides of the heat dissipation body 1211 along the side view direction X. The slide 1213 is extended along the sliding direction Y to enable the heat dissipation portion 121 to slide along the sliding direction Y. One end of the connecting arm 1214 is connected to the heat dissipation body 1211. The connecting arm 1214 extends along the force direction Z around the periphery of the heat dissipation body 1211 and the heat dissipation blades 1212. The heat dissipation body 1211 is disposed on the connecting arm 1214 along the sliding direction Y toward the plate body 111. The connecting arm 1214 and the heat dissipation blades 1212 may have substantially the same thickness or structure. The connecting arm 1214 may also be used for heat dissipation.

[0043] In one embodiment, the heat dissipation body 1211 is used to connect the nozzle portion 122, and the connecting arm 1214 connects the heat dissipation body 1211 and the bracket 11. The sensor 13 is disposed on the connecting arm 1214, and is used to sense the deformation of the connecting arm 1214.

[0044] In one embodiment, the connecting arm 1214 includes a connecting portion 12141 and a bending portion 12142. The connecting portion 12141 is connected to the bracket 11, and the bending portion 12142 connects the heat dissipation body 1211 and the connecting portion 12141. The sensor 13 is disposed at the bending portion 12142, and the extending direction of the bending portion 12142 intersects with the force direction Z.

[0045] In one embodiment, the heat dissipation body 1211 is configured to extend along the force direction Z, the connection portion 12141 is configured to extend along the force direction Z, and the bending portion 12142 is disposed on a side of the connection portion 12141 close to the nozzle portion 122 along the force direction Z. The connecting arm 1214 is disposed on one side of the heat dissipation body 1211 along the sliding direction Y, the bending portion 12142 is disposed between the heat dissipation body 1211 and the connection portion 12141 along the sliding direction Y, and the extending direction of the bending portion 12142 is between the sliding direction Y and the force direction Z.

[0046] In this embodiment, the connection portion 12141 and the plate body 111 are constructed to be substantially parallel, so that the connection portion 12141 and the plate body 111 can be well contacted and matched, and the extension direction of the bending portion 12142 is between the sliding direction Y and the force direction Z, and especially intersects with the extension direction of the heat dissipation body 1211. The sensor 13 can be a device capable of sensing deformation, such as a strain gauge, a piezoelectric ceramic sheet, a varistor and other components. The sensor 13 is constructed to be electrically connected to a processor or a signal sensor 13 (such as a circuit board, not shown in the figure). The sensor 13 can sense the displacement of the nozzle assembly 12, and is used to cooperate with the nozzle assembly 12 for operations such as alignment.

[0047] It is understandable that during the 3D printing process, the nozzle portion 122 of the nozzle assembly 12 may contact other structures (such as the molding platform 191 of the 3D printing device) along the force direction Z, and the contact may cause the nozzle portion 122 to be subjected to force and compressed or displaced along the force direction Z. The heat dissipation portion 121 can have a certain movable gap compared to the fixing bolt 14 along the force direction Z, and the heat dissipation portion 121 connected to the nozzle portion 122 will be displaced along the force direction Z synchronously with the nozzle portion 122. The connecting portion 12141 is fixedly connected to the plate portion 111 along the force direction Z, the heat dissipation body 1211 is displaced along the force direction Z, the heat dissipation body 1211 and the connecting portion 12141 move along the force direction Z, and the bending portion 12142 and the two ends of the heat dissipation body 1211 and the connecting portion 12141 are subjected to forces in different directions, so the bending portion 12142 is pulled and deformed. The sensor 13 disposed at the bending portion 12142 can generate a corresponding sensing electrical signal by sensing the deformation of the bending portion 12142 , and the sensing electrical signal corresponds to a contact signal of the nozzle assembly 12 .

[0048] In this embodiment, the sensor 13 can be specifically a strain sensing unit, a fiber grating sensing unit, a piezoresistive sensing unit, and a micro strain gauge sensing unit. Among them, the strain sensing unit is based on the principle that the resistance, capacitance or inductance of the material changes with the occurrence of strain. The strain sensing unit is usually composed of an elastic element and a sensitive element (such as a resistance strain gauge), and can convert mechanical strain into an electrical signal for measurement. The fiber grating sensing unit uses the grating structure in the optical fiber to measure strain, and has high resolution, strong anti-interference ability and long-distance transmission capability. The piezoresistive sensing unit measures strain based on the change in resistance value, and has the characteristics of low cost and ease of use. The micro strain gauge sensing unit is a high-precision sensor 13 that can measure tiny strain changes and usually has high sensitivity and low temperature influence. It can be understood by those skilled in the art that the sensor 13 can select a known and feasible structure, which can sense the slight deformation of the bending portion 12142, thereby realizing the sensing of the contact signal of the nozzle assembly 12.

[0049] In one embodiment, further combining Figure 8 As shown, the extension direction of the bending portion 12142 intersects with the extension direction of the plane where the molding platform 191 is located and is set at an angle. Specifically, the angle between the extension direction of the bending portion 12142 and the extension direction of the plane where the molding platform 191 is located can range from 0° to 90° (excluding 0° and 90°), further can range from 20° to 70°, further can range from 30° to 60°, and specifically can range from 45°.

[0050] It can be understood that when the extension direction of the bending portion 12142 intersects with the extension direction of the plane where the forming platform 191 is located and is set at an angle, the length of the bending portion 12142 is longer than when it is set along the parallel sliding direction Y or along the parallel force direction Z. Correspondingly, the area of ​​the bending portion 12142 along its extension direction will be larger. Therefore, when the bending portion 12142 is compressed and deformed, the bending portion 12142 with a larger area can have a larger deformation amount, or it can be understood that the bending portion 12142 with a larger area can be deformed over its entire large area, so that the sensor 13 set on the bending portion 12142 can more easily sense the deformation, thereby improving the sensing sensitivity.

[0051] In one embodiment, the bracket 11 is provided with a first mounting hole 1110 penetrating therethrough along the sliding direction Y, the connecting portion 12141 is provided with a second mounting hole 12140 penetrating therethrough along the sliding direction Y, and the heat dissipation body 1211 is provided with a third mounting hole 12110 penetrating therethrough along the sliding direction Y. The nozzle kit 10 further includes a fixing bolt 14, which passes through the first mounting hole 1110, the second mounting hole 12140, and the third mounting hole 12110 along the sliding direction Y, and the outer diameter of the fixing bolt 14 is smaller than the inner diameter of the third mounting hole 12110.

[0052] In this embodiment, the heat dissipation body 1211 is spaced from the plate body 111 along the sliding direction Y, and the connecting arm 1214 is disposed between the heat dissipation body 1211 and the plate body 111 along the sliding direction Y. The first mounting hole 1110, the second mounting hole 12140, and the third mounting hole 12110 are configured to be located at the same height along the force application direction Z, and the first mounting hole 1110, the second mounting hole 12140, and the third mounting hole 12110 are aligned and connected. The plate body 111 is provided with a first mounting hole 1110, the connecting portion 12141 is provided with a second mounting hole 12140, and the heat dissipation body 1211 is provided with a third mounting hole 12110. The fixing bolt 14 is sequentially disposed along the sliding direction Y with the first mounting hole 1110, the second mounting hole 12140, and the third mounting hole 12110 to fix the plate body 111, the connecting arm 1214, and the heat dissipation body 1211. At the same time, the outer diameter of the fixing bolt 14 is smaller than the inner diameter of the third mounting hole 12110, and the heat dissipation portion 121 can have a certain movable gap along the force direction Z compared to the fixing bolt 14, so that when the nozzle assembly 12 is touched along the force direction Z, the heat dissipation body 1211 can move along the force direction Z, and the connecting portion 12141 is connected and fixed to the plate body 111, and the bending portion 12142 connecting the heat dissipation body 1211 and the connecting portion 12141 is deformed due to the force, triggering the sensor 13 to generate a sensing signal.

[0053] In this embodiment, the number of the first mounting hole 1110, the second mounting hole 12140 and the third mounting hole 12110 are all two, and they are respectively arranged in pairs along the side-view direction X. In other embodiments, the number of the first mounting hole 1110, the second mounting hole 12140 and the third mounting hole 12110 may also be multiple, and multiple first mounting holes 1110 or multiple second mounting holes 12140 or multiple third mounting holes 12110 may be respectively arranged in intervals along the side-view direction X. The fixing bolt 14 may be a bolt-type connection structure, and the fixing bolt 14 passes through the first mounting hole 1110, the second mounting hole 12140 and the third mounting hole 12110 along the sliding direction Y, thereby fixing the plate body 111, the connecting arm 1214 and the heat dissipation body 1211.

[0054] It can be understood that the fixing bolt 14 is assembled with the first mounting hole 1110, the second mounting hole 12140 and the third mounting hole 12110 through a mechanical structure; the outer diameter of the fixing bolt 14 can be constructed to be larger than the inner diameter of the first mounting hole 1110, the second mounting hole 12140 and the third mounting hole 12110, or, due to the existence of assembly tolerance, the outer diameter of the fixing bolt 14 is larger than the inner diameter of the first mounting hole 1110, the second mounting hole 12140 and the third mounting hole 12110. As a result, there is a certain movable gap between the fixing bolt 14 and the first mounting hole 1110, the second mounting hole 12140 and the third mounting hole 12110 along the force application direction Z, so that the heat dissipation body 1211 can be displaced to a certain extent along the ground direction when being squeezed, the bending portion 12142 can be deformed accordingly, and the sensor 13 can generate a sensing signal accordingly.

[0055] Further integration Figure 4 and Figure 5 As shown, in one embodiment, the heat dissipation body 1211 is used to connect the nozzle part 122; the slide 1213 is provided at one end of the heat dissipation body 1211 close to the sliding part 112 along the force direction Z, and is slidably connected to the bracket 11. The sensor 13 is provided between the slide 1213 and the bracket 11, and is used to sense the displacement of the nozzle assembly 12.

[0056] In one embodiment, the sensor 13 is connected to the bracket 11 and is in detachable contact with the slide 1213 , or the sensor 13 is connected to the slide 1213 and is in detachable contact with the bracket 11 .

[0057] In one embodiment, the slide 1213 includes a boss 12131 that is convexly arranged along the side-viewing direction X; the sliding portion 112 is provided with a slide groove 1120 that is concavely formed along the side-viewing direction X, and the boss 12131 is slidably arranged in the slide groove 1120. The heat dissipation portion 121 is configured to be slidably arranged with the bracket 11 along the sliding direction Y, and the side-viewing direction X intersects with the sliding direction Y.

[0058] In this embodiment, the slide 1213 is located at the end of the heat dissipation body 1211, and the slide 1213 includes two bosses 12131, which are respectively connected to the heat dissipation body 1211 and are protruded toward opposite sides along the side-view direction X. The sliding portion 112 is provided with two mutually spaced slide grooves 1120 along the side-view direction X, and the area between the two slide grooves 1120 along the side-view direction X is constructed to be empty to accommodate the slide 1213 and the end of the heat dissipation body 1211 connected to the slide 1213, and the two slide grooves 1120 are each used to accommodate a boss 12131. The boss 12131 extends into the slide groove 1120 along the side viewing direction X, and the slide 1213 is stacked with the sliding part 112 along the force direction Z to realize the support of the heat dissipation part 121 by the bracket 11 along the force direction Z. The boss 12131 and the slide groove 1120 are both extended along the sliding direction Y, so that the heat dissipation part 121 can be slidably arranged with the sliding part 112 along the sliding direction Y.

[0059] In one embodiment, the sliding portion 112 is configured to have a receiving groove 113 on one side of the projection 12131 along the force direction Z, and the receiving groove 113 is used to receive the sensor 13. The side of the receiving groove 113 along the force direction Z toward the projection 12131 is an open structure, and the open structure enables the sensor 13 to be exposed by the receiving groove 113, and the side of the sensor 13 along the force direction Z toward the projection 12131 can directly contact or cooperate with the projection 12131.

[0060] In this embodiment, the receiving groove 113 can be formed by the sliding part 112 by a material reduction method or an integral form. The receiving groove 113 is at least constructed as an open structure on one side facing the boss 12131 along the force direction Z. The receiving groove 113 can also be constructed as an open structure on one side facing the heat dissipation body 1211 along the side view direction X, or the side facing the heat dissipation body 1211 along the side view direction X and the side facing the boss 12131 along the force direction Z are both open structures; at the same time, both sides of the receiving groove 113 along the sliding direction Y are constructed as closed structures. The sensor 13 provided in the receiving groove 113 is fixedly limited on both sides along the sliding direction Y, and the sensor 13 is exposed and directly faces the heat dissipation part 121 on one side facing the heat dissipation body 1211 along the side view direction X or on one side facing the boss 12131 along the force direction Z.

[0061] It is understandable that in one embodiment, the sensor 13 may use a pressure sensing unit; after the boss 12131 and the slide 1120 are assembled, the nozzle assembly 12 has a tendency to be pressed down along the force direction Z due to its own weight, and the sensor 13 bears the force of the boss 12131. During the 3D printing process, the nozzle assembly 12 may contact other structures (such as the molding platform 191 or the base of the 3D printing device) along the force direction Z. The contact will cause the nozzle assembly 12 to be stressed and receive a reverse support force along the force direction Z. The force applied to the sensor 13 by the boss 12131 along the force direction Z is correspondingly reduced, and the sensor 13 senses the change in the force and generates a corresponding sensing signal.

[0062] In one embodiment, the plate body 111 and the nozzle assembly 12 are arranged side by side along the force direction Z. The sliding portion 112 is connected to the plate body 111 and is convexly arranged along the sliding direction Y, and the sliding direction Y intersects with the force direction Z. The nozzle assembly 12 is arranged on one side of the sliding portion 112 along the force direction Z, the slide 1213 and the slide 112 are staggered and slidably connected along the force direction Z, and the sensor 13 is arranged between the slide 1213 and the slide 112.

[0063] In one embodiment, the sliding portion 112 is disposed on one side of the plate body 111 along the sliding direction Y, and the nozzle assembly 12 is disposed on one side of the sliding portion 112 along the force direction Z. The slide 1213 is disposed at the end of the heat dissipation portion 121 along the force direction Z, and the connecting arm 1214 is extended along the force direction Z, and the connecting arm 1214 is detachably connected to the plate body 111. The slide 1213 is disposed on the side of the heat dissipation portion 121 facing the sliding portion 112, and the connecting arm 1214 is disposed on the side of the heat dissipation portion 121 facing the plate body 111. When the slide 1213 cooperates with the sliding portion 112 to slide the heat dissipation portion 121 to a predetermined position along the sliding direction Y, at least a portion of the connecting arm 1214 extending along the force direction Z can abut against the plate body 111 and be connected through other fixing structures, so that the heat dissipation portion 121 is fixed to the plate body 111.

[0064] It can be understood that the plate body 111 and the nozzle assembly 12 are arranged side by side along the force direction Z, which not only facilitates the installation of the heat dissipation part 121 and the bracket 11, but also prevents the plate body 111 from causing deformation, displacement or force on the nozzle assembly 12.

[0065] In other embodiments, the sensor 13 may also be arranged on the upstream side or downstream side of the boss 12131 along the force direction Z toward the sliding part 112. It can be understood that when the nozzle assembly 12 is subjected to a reverse support force along the force direction Z, the pressure applied to the sensor 13 by the sensor 13 and / or the sliding part 112 will change accordingly, and the sensor 13 can sense the change in the force and generate a corresponding sensing signal.

[0066] Further integration Figure 6 and Figure 7 As shown, in one embodiment, the heat dissipation portion 121 is used to connect with the bracket 11, and the nozzle portion 122 is connected to the heat dissipation portion 121 and is arranged on the side of the heat dissipation portion 121 away from the bracket 11 along the force direction Z. The sensor 13 is arranged between the heat dissipation portion 121 and the nozzle portion 122, and is used to sense the displacement of the nozzle assembly 12.

[0067] In one embodiment, the isolation sleeve 123 is connected to the nozzle portion 122, and the connecting post 124 connects the isolation sleeve 123 and the heat dissipation portion 121. The connecting post 124 is movably connected to the isolation sleeve 123, and the connection between the connecting post 124 and the isolation sleeve 123 has a gap 1234 with a variable size along the force application direction Z. The sensor 13 is disposed in the gap 1234, and is detachably in contact with the isolation sleeve 123 and / or the connecting post 124, and is used to sense the displacement of the nozzle assembly 12.

[0068] In one embodiment, the isolation sleeve 123 includes a first part 1231 and a second part 1232 that are connected. The first part 1231 is used to accommodate and connect the nozzle part 122. The second part 1232 is extended from the first part 1231 to a side deviating from the transmission channel 100. The second part 1232 is provided with an installation cavity 1233. One end of the connecting column 124 is disposed in the installation cavity 1233 and is connected to the second part 1232 by means of snap connection, threaded connection, abutment and limit, etc.; and the other end of the connecting column 124 is connected to the heat dissipation component by means of snap connection, threaded connection, abutment and limit, etc.

[0069] In this embodiment, the sensor 13 may be a contact sensor 13 with good high temperature resistance, such as a ceramic piezoelectric sensor 13 or a capacitive sensor 13. The capacitive sensor 13 measures strain based on the change of capacitance value, and has high sensitivity and low temperature influence.

[0070] It can be understood that the sensor 13 disposed between the heat dissipation part 121 and the nozzle part 122 is close to the nozzle part 122 where the temperature is relatively high, and may be affected by continuous high temperature in the working state. Selecting a sensor 13 with better high temperature resistance can improve the reliability of the nozzle kit 10.

[0071] Further integration Figure 6As shown, in one embodiment, the connecting column 124 includes a column 1241 and a cap 1242, the cap 1242 is connected to a side of the column 1241 close to the nozzle portion 122 along the force direction Z, the column 1241 passes through the second portion 1232 along the force direction Z, and the column 1241 extends away from one end of the cap 1242 along the force direction Z and connects to the heat dissipation portion 121. The sensor 13 is configured to be sleeved on the outside of the column 1241 and clamped between the cap 1242 and the second portion 1232 along the force direction Z. The sensor 13 is constructed to be subjected to the force applied by the connecting column 124 and / or the isolation sleeve 123 along the force direction Z. During the 3D printing process, the nozzle assembly 12 may contact other structures (such as the molding platform 191 or the base of the 3D printing device) along the force direction Z. The contact will cause the nozzle assembly 12 to be subjected to force and a reverse supporting force along the force direction Z. The force applied to the sensor 13 by the connecting column 124 and / or the isolation sleeve 123 along the force direction Z changes accordingly (increases or decreases), and the sensor 13 senses the change in the force and generates a corresponding sensing signal.

[0072] Further integration Figure 7 As shown, in one embodiment, the connecting column 124 includes a column 1241, a cap 1242, and a ring 1243. The cap 1242 is connected to a side of the column 1241 close to the nozzle portion 122 along the force direction Z. The column 1241 passes through the second portion 1232 along the force direction Z. The column 1241 is away from the cap 1242 along the force direction Z and extends to connect with the heat dissipation portion 121. The ring 1243 is arranged on the outside of the column 1241 and is located between the nozzle portion 122 and the heat dissipation portion 121. The sensor 13 is configured to be sleeved on the outside of the column 1241 and clamped between the ring 1243 and the second portion 1232 along the force direction Z. The sensor 13 is constructed to be subjected to the force applied by the connecting column 124 and / or the isolation sleeve 123 along the force direction Z. During the 3D printing process, the nozzle assembly 12 may contact other structures (such as the molding platform 191 or the base of the 3D printing device) along the force direction Z. The contact will cause the nozzle assembly 12 to be subjected to force and a reverse supporting force along the force direction Z. The force applied to the sensor 13 by the connecting column 124 and / or the isolation sleeve 123 along the force direction Z changes accordingly (increases or decreases), and the sensor 13 senses the change in the force and generates a corresponding sensing signal.

[0073] It can be understood that in the above embodiment, the sensor 13 can be constructed to be electrically connected to the processor or signal sensing unit (such as a circuit board, not shown) of the nozzle kit 10. Depending on the different settings of the sensor 13, avoidance structures such as openings (not shown) can be set at different positions of the bracket 11, and conductive wiring can be used to connect the sensor 13 and the processor or signal sensing unit, or wireless transmission can be used to achieve communication between the sensor 13 and the processor or signal sensing unit. Among them, the specific model of the sensor 13 and the form of its electrical connection with the processor or signal sensing unit can be adopted in a known and feasible manner, which will not be repeated here.

[0074] Further integration Figure 8 As shown, an embodiment of the present application further provides a 3D printing device 1, which includes a 3D printing body 19 and a nozzle kit 10 as in any one of the aforementioned embodiments, and the nozzle kit 10 is connected to the 3D printing body 19.

[0075] In one embodiment, the 3D printing body 19 includes a molding platform 191, an X-axis drive assembly 192 and a gantry 193. The molding platform 191 and the X-axis drive assembly 192 are respectively connected to the gantry 193. The nozzle kit 10 is movably connected to the X-axis drive assembly 192. The nozzle kit 10 can move relative to the molding platform 191 to perform 3D printing.

[0076] In one embodiment, the present application also provides a 3D printing method, comprising the following steps: Step S1: Select a file to print.

[0077] Step S2: Obtain the coordinates of the lower and upper regions of the model according to the file to be printed.

[0078] Step S3: Leveling, obtaining the inclination angle of the molding platform 191 in the side viewing direction X and the sliding direction Y.

[0079] Step S4: Start printing.

[0080] In one embodiment, when the nozzle kit 10 and / or 3D printing device 1 provided in the embodiment of the present application corresponds to step S3, leveling is achieved by the nozzle kit 10 touching multiple points on the corresponding molding platform 191 along the force application direction Z for multiple times.

[0081] Specifically, the nozzle assembly 10 is driven to move along the force direction Z toward the molding platform 191 until the nozzle portion 122 contacts the molding platform 191 (specifically, it can be a hot bed). After the contact, the nozzle assembly 10 will be driven to continue to move along the force direction Z and squeeze the molding platform 191, and the molding platform 191 will apply a reverse force to the nozzle portion 122, squeezing the nozzle portion 122 to move in the reverse direction of the force direction Z. Figures 1 to 3In the nozzle kit 10 and the 3D printing device 1 using the same, the nozzle part 122 is connected to the heat dissipation body 1211 and is squeezed to move in the opposite direction of the force direction Z, the bending part 12142 is connected to the heat dissipation body 1211 and is subjected to force, and the connecting part 12141 is connected to the bending part 12142 but is fixed to the bracket 11. Therefore, the two ends of the bending part 12142 are subjected to uneven force and torsional deformation occurs, and the sensor 13 disposed on the bending part 12142 senses the deformation of the bending part 12142 and can generate a corresponding sensing electrical signal, which corresponds to the contact signal of the nozzle assembly 12.

[0082] It is understandable that in a general nozzle kit 10 and / or 3D printing device 1, the sensor 13 can only be triggered to generate a sensing signal when the force between the nozzle and the hot bed is large enough. Therefore, the time from the nozzle contacting the heat transfer to the generation of the sensing electrical signal in the general nozzle kit 10 and / or 3D printing device 1 is longer. Figures 1 to 3 The nozzle kit 10 and the 3D printing device 1 using the same are shown as follows. The inclined bending portion 12142 is provided to amplify the deformation, so that when the force of the nozzle portion 122 and the molding platform 191 squeezing each other is small, the bending portion 12142 can generate a deformation sufficient to be sensed by the sensor 13, so that the sensor 13 can generate a sensing electrical signal earlier. That is, the nozzle kit 10 and / or the 3D printing device 1 of the present application amplifies the deformation by providing the bending portion 12142, so that the trigger point of the sudden force change (the point where the sensing electrical signal is generated) can be sensed in advance.

[0083] In the above, the specific implementation of the present application is described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific implementation of the present application without departing from the spirit and scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A nozzle kit, characterized in that: The nozzle kit is configured to be driven to move in a force-applying direction, and the nozzle kit includes: Bracket; a nozzle assembly connected to the bracket and configured to be movable along the force application direction when driven by an external force; A sensor is connected to the bracket and / or the nozzle assembly and is used to sense the displacement and / or deformation of the nozzle assembly.

2. The nozzle kit according to claim 1, characterized in that: The nozzle assembly includes a heat dissipation portion and a nozzle portion, and the heat dissipation portion includes: A heat dissipation body, which is used to connect the nozzle part; A connecting arm connecting the heat dissipation body and the bracket; Wherein, the sensor is arranged on the connecting arm and is used for sensing the deformation of the connecting arm.

3. The nozzle kit according to claim 2, characterized in that: The connecting arm comprises: A connecting portion connected to the bracket; A bending portion connecting the connecting portion and the heat dissipation body; Wherein, the sensor is arranged at the bending portion, and an extending direction of the bending portion intersects with the force application direction.

4. The nozzle kit according to claim 3, characterized in that: The heat dissipation body is configured to extend along the force application direction; The connecting portion is configured to extend along the force-applying direction, and the bending portion is disposed on a side of the connecting portion close to the nozzle portion along the force-applying direction; The connecting arm is arranged at one side of the heat dissipation body along the sliding direction, and the bending portion is arranged between the heat dissipation body and the connecting portion along the sliding direction; The sliding direction intersects with the force application direction, and the extending direction of the bent portion is between the sliding direction and the force application direction.

5. The nozzle kit according to claim 3, characterized in that: The bracket is provided with a first mounting hole penetrating therethrough along a sliding direction; The connecting portion is provided with a second mounting hole penetrating therethrough along the sliding direction; The heat dissipation body is provided with a third mounting hole penetrating therethrough along the sliding direction; The nozzle kit further includes a fixing bolt, which is arranged at the first mounting hole, the second mounting hole and the third mounting hole along the sliding direction, and the outer diameter of the fixing bolt is smaller than the inner diameter of the third mounting hole.

6. The nozzle kit according to claim 1, characterized in that: The nozzle assembly includes a heat dissipation portion and a nozzle portion, and the heat dissipation portion includes: A heat dissipation body, which is used to connect the nozzle part; A slide, which is arranged at the end of the heat dissipation body along the force application direction and is slidably connected to the bracket; Wherein, the sensor is arranged between the slide and the bracket, and is used to sense the displacement of the nozzle assembly.

7. The nozzle kit according to claim 6, characterized in that: The sensor is connected to the bracket and is in detachable contact with the slide table, or the sensor is connected to the slide table and is in detachable contact with the bracket.

8. The spray head kit according to claim 6, characterized in that: The support comprises: A plate body portion, which is arranged side by side with the nozzle assembly along the force application direction; A sliding portion connected to the plate body and protruding along a sliding direction, wherein the sliding direction intersects with the force application direction; The nozzle assembly is arranged at one side of the sliding part along the force application direction, the slide table and the sliding part are staggered and slidably connected along the force application direction, and the sensor is arranged between the slide table and the sliding part.

9. The spray head kit according to claim 1, characterized in that: The nozzle assembly comprises: A heat dissipation portion, which is used to be connected to the bracket; a nozzle portion connected to the heat dissipation portion and disposed on a side of the heat dissipation portion away from the bracket along the force application direction; Wherein, the sensor is arranged between the heat dissipation part and the nozzle part, and is used for sensing the displacement of the nozzle assembly.

10. The spray head kit according to claim 9, characterized in that: The nozzle assembly further comprises: A spacer sleeve connected to the nozzle portion; A connecting column connecting the isolation sleeve and the heat dissipation portion; Among them, the connecting column is movably connected to the isolation sleeve, and the connection between the connecting column and the isolation sleeve has a gap with variable width along the force application direction. The sensor is arranged in the gap and is detachably in contact with the isolation sleeve and / or the connecting column for sensing the displacement of the nozzle assembly.

11. A 3D printing device, characterized in that: It comprises a 3D printing body and a nozzle kit as described in any one of claims 1 to 10, wherein the nozzle kit is connected to the 3D printing body.

12. The 3D printing device according to claim 11, characterized in that: The 3D printing body includes a molding platform, the nozzle kit is adjustable relative to the molding platform, and the extension direction of the bending portion of the nozzle assembly intersects with the extension direction of the plane where the molding platform is located and is arranged at an angle.

13. A 3D printing method, characterized in that: The 3D printing method is implemented by the 3D printing device according to claim 11, and the 3D printing method comprises the following steps: Select File to Print; Obtain the coordinates of the lower and upper regions of the model according to the file to be printed; Leveling, obtaining the inclination angle of the forming platform of the 3D printing body in the side viewing direction and the sliding direction; Printing starts.

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