Swing switching double-jet device and method for installing and switching jets

Abstract

The application discloses a swing switching double-nozzle device, which comprises a swing switching mechanism and a double-nozzle mechanism fixed to the swing switching mechanism. The swing switching mechanism comprises a fixed plate, a swing seat and a first driving mechanism. The swing seat is fixed to the double-nozzle mechanism, and the first driving mechanism drives the swing seat and the double-nozzle mechanism to rotate. The first driving mechanism realizes the switching of the double nozzle through swinging. Compared with the integrated double nozzle in parallel, the nozzle width is smaller, so that a larger printing volume, smaller cost and lighter weight can be obtained, thereby improving the 3D printing performance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of 3D printing, and particularly relates to a swing switching double-nozzle device and a method for installing and switching nozzles. BACKGROUND

[0002] FDM (Fused Deposition Modeling) 3D printers melt and deposit printing consumables to the printing platform through high-temperature heating of the printing nozzle. The molten printing consumables quickly solidify when they contact the printing platform. The printing nozzle deposits the printing consumables layer by layer on the printing platform along the set printing path, thereby constructing a model with a three-dimensional structure.

[0003] The current FDM printing technology is developing towards rapid printing and needs to take into account the diversity of materials to adapt to real use scenarios, such as the rapid sample of some tooling, which needs to use PA-cf, a high-strength material. Using one nozzle can only print one kind of material, so the model body and the support will use the same kind of material, which is not conducive to the separation of the model and the support, and is not conducive to obtaining a good support surface to improve the printing effect and the printing quality of the model. In addition, in order to quickly verify the sample and print large-size tooling models, the printing speed and the printing volume also need to be improved. However, double nozzles often use two stepper motors to control the feeding of the material into the nozzle, which increases the weight of the nozzle, limits the running acceleration, and reduces the printing volume. SUMMARY

[0004] The purpose of the present application is to provide a swing switching double-nozzle device and a method for installing and switching nozzles, which can realize double-nozzle printing, and through the design of an angle switching mechanism, only one first driving mechanism is needed to realize the switching of the double nozzles, and only one second driving mechanism (stepper motor) is needed to control the feeding of the material into the nozzle, thereby reducing the weight of the nozzle, improving the printing speed and the printing volume in the application scenario of multiple materials, and saving costs.

[0005] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0006] A swing switching double-nozzle device, comprising a swing switching mechanism and a double-nozzle mechanism fixed to the swing switching mechanism, the swing switching mechanism comprising a fixed plate, a swing seat and a first driving mechanism, the swing seat fixing the double-nozzle mechanism, and the first driving mechanism driving the swing seat and the double-nozzle mechanism to rotate.

[0007] The first driving mechanism realizes the switching of the double nozzles through swinging, and compared with the integrated double nozzles in parallel, the width of the nozzle is smaller, so a larger printing volume, smaller cost and lighter weight can be obtained, thereby improving the 3D printing performance.

[0008] Further, the double nozzle mechanism comprises at least two nozzles, a second driving mechanism and a wire feeding wheel connected to the second driving mechanism, the second driving mechanism drives the wire feeding wheel to rotate, the swing switching mechanism further comprises handles mounted on the fixed plate, one handle corresponds to one nozzle, the two nozzles are arranged at a certain angle, a wire feeding idler wheel is arranged between the handle and the wire feeding wheel, and the guide pipe of the double nozzle mechanism is aligned with the wire feeding gap. The second driving mechanism drives the wire feeding wheel to rotate, the wire enters the wire feeding gap, the wire feeding idler wheel and the wire feeding wheel press the wire, and the wire feeding wheel rotates to drive the wire to move downward. The two nozzles are arranged at a certain angle to facilitate swing switching.

[0009] Further, the swing switching mechanism further comprises a swing rod, the swing rod is connected with a first driving mechanism, the swing rod swings back and forth following the first driving mechanism, and the swing rod is in transmission connection with the swing seat. The first driving mechanism drives the swing rod to rotate, and the swing rod drives the swing seat to swing back and forth.

[0010] Further, the swing rod is provided with three vertices, the first vertex and the second vertex of the swing rod are respectively in contact with a single handle, and the third vertex of the swing rod is connected with the swing seat; the vertices of the swing rod are all provided with pulleys, the handle is provided with a limiting sliding way, the limiting sliding way is in contact with the pulleys on the first vertex or the second vertex, the swing seat is provided with a triangular frame, and the pulley of the third vertex moves in the triangular frame. The first vertex and the second vertex of the swing rod are used for pressing or releasing the handle, and the third vertex of the swing rod moves in the swing seat to drive the swing seat to rotate. The bearings of the first vertex and the second vertex can roll along the limiting sliding way, and the third vertex moves in the triangular frame of the swing seat.

[0011] Further, the handle is provided with a wire feeding channel, when one of the nozzles in the double nozzle mechanism is located in the vertical direction, the wire feeding channel on the handle, the wire feeding gap and the guide pipe of the nozzle form a vertical wire feeding channel. The wire feeding channel is vertically arranged, so that the wire is convenient for printing.

[0012] Further, the second driving mechanism is connected with an axle, the axle is sleeved with a fixed rod, the two ends of the fixed rod are respectively hinged with a single handle, the handle rotates around the end point of the fixed rod, each handle is provided with a limiting screw, and the limiting screws of the two handles are clamped through an arc-shaped spring. The bottom of the handle rotates around the end point of the fixed rod, the top of the handle moves to the left side or the right side, so that the wire feeding idler wheel on the handle presses the wire or releases the wire.

[0013] Further, the output shaft 21 of the second driving mechanism is connected with a driving wheel, the driving wheel is in gear engagement with a driven wheel, the driven wheel penetrates and is fixed with an axle, and the axle is provided with a wire feeding wheel. The driving wheel is a gear with a small diameter, the driven wheel is a gear with a large diameter, the driven wheel drives the axle and the wire feeding wheel to rotate, so as to play a role of speed reduction.

[0014] Further, the fixed plate is provided with a limiting block, the limiting block can abut against the swing seat.

[0015] Further, the swing seat is provided with a mounting groove and a rotating pressing plate, the spray head is provided with a connecting boss, the connecting boss is matched with the mounting groove, the rotating pressing plate rotates around a rotating shaft, and the rotating pressing plate can press the connecting boss. The connecting boss and the mounting groove are arranged to enable the spray head to be quickly mounted and dismounted, and the rotating pressing plate presses the connecting boss to prevent the connecting boss from moving.

[0016] An installation and switching method of a swing switching double-spray head device, comprising the following steps:

[0017] (1) two spray heads are respectively installed into the mounting groove of the swing seat through the connecting boss, and after the installation is completed, the rotating pressing plate is rotated to the upper side of the connecting boss to press the connecting boss;

[0018] (2) in the initial state, the left spray head is in the printing state, the filament on the left side sequentially passes through the filament channel, the filament gap and the material guide pipe to enter the left spray head, the filament guide idler on the left handle is close to the filament guide wheel driven by the first driving mechanism, so that the filament is pressed to move downward, the printing of the left spray head is realized, the second vertex of the swing lever abuts against the limiting slide way of the right handle, the first vertex does not contact the limiting slide way of the left handle, and the third vertex of the swing lever is located at the left end point in the triangular frame of the swing seat;

[0019] (3) when the spray head is switched, the first driving mechanism is reversely rotated to drive the swing seat to rotate, the first driving mechanism is simultaneously rotated to drive the third vertex of the swing lever to move from the left end point to the right end point in the triangular frame, the first vertex of the swing lever abuts against the limiting slide way of the left handle, the second vertex does not contact the limiting slide way of the right handle, the left handle is rotated to the left side around the left end point of the left fixed rod, the right handle and the spray head are in the vertical position, the filament on the right side sequentially passes through the filament channel, the filament gap and the material guide pipe to enter the right spray head, and the filament guide idler on the right handle is close to the filament guide wheel driven by the first driving mechanism, so that the filament is pressed to move downward, and the printing of the right spray head is realized.

[0020] Due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0021] 1. The first driving mechanism realizes the switching of the double spray heads through swinging, compared with other switching modes, this method is faster in switching, improves the printing speed, compared with the integrated double spray heads in parallel, the width of the spray head is smaller, so that a larger printing volume, smaller cost and lighter weight can be obtained, and the 3D printing performance is improved.

[0022] 2. Conventional dual-nozzle designs require two second drive mechanisms and two sets of reduction gears. However, this application, by switching the handle swing, only requires one second drive mechanism to drive the left or right handle to feed the filament. It is relatively lightweight and greatly reduces the weight of the nozzle.

[0023] 3. The filament enters the filament feed gap, and the filament feed idler wheel and filament feed wheel press the filament down. The rotation of the filament feed wheel moves the filament downward. The bottom of the handle rotates around the end of the fixed rod, and the top of the handle moves to the left or right, so that the filament feed idler wheel on one side of the handle presses the filament down or releases the filament, so that printing is achieved on one side of the printhead, while the printhead on the other side does not eject filament.

[0024] 4. The first and second vertices of the lever are used to abut or release the handle, and the third vertices of the lever move within the swing seat. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a front view of a swing-switch dual-nozzle device during left-nozzle printing.

[0027] Figure 2 for Figure 1 A three-dimensional view of the front.

[0028] Figure 3 This is a front view of a swing-switch dual-nozzle device during right-nozzle printing.

[0029] Figure 4 for Figure 1 A 3D view of the back.

[0030] Figure 5 This is a schematic diagram of the structure of the fixed plate, handle, swing arm, and swing seat when the left printhead is printing.

[0031] Figure 6 This is a schematic diagram of the back structure of the handle, lever, and swing seat when the left printhead is printing.

[0032] Figure 7 This is a schematic diagram of the nozzle structure.

[0033] Figure 8 This is a cross-sectional view of a swing-switching dual-nozzle device. Detailed Implementation

[0034] like Figures 1 to 8The swing switching double nozzle device includes a swing switching mechanism and a double nozzle mechanism fixed to the swing switching mechanism. The double nozzle mechanism includes a left nozzle 1 and a right nozzle 2. The swing switching mechanism includes a fixed plate 3, a swing seat 4, a swing lever 16, and a first driving mechanism 17. The first driving mechanism 17 drives the swing lever 16 to swing, and the swing lever 16 drives the swing seat 4 and the double nozzle mechanism to rotate. The first driving mechanism 17 can be a rudder or other elements capable of achieving the same function. The fixed plate 3 is provided with two limiting blocks 8, which can respectively abut against the swing seat 4 at different angles, thereby limiting the swing angle of the swing seat 4.

[0035] Referring to Figure 5 、 Figure 6 The swing seat 4 has an installation groove 24, which includes a left nozzle installation groove 241 and a right nozzle installation groove 242. The left nozzle installation groove 241 and the right nozzle installation groove 242 are not horizontally arranged but are arranged at a certain angle, so that the left nozzle 1 and the right nozzle 2 fixed to the swing seat 4 are also arranged at a certain angle. The size of the angle can be selected according to actual conditions. The first driving mechanism 17 controls the swing of the swing lever 16 and the swing seat 4, thereby enabling the double nozzle mechanism to switch. The limiting blocks 8 limit the position of the swing seat 4, in combination Figure 1 、 Figure 2 、 Figure 5As shown, when the swing seat 4 abuts against the right limiting block 8, the left nozzle 1 is vertically arranged, the left nozzle 1 works normally, and the axial height of the right nozzle 2 is higher than that of the left nozzle 1, so the right nozzle 2 does not interfere with the work of the left nozzle 1. The swing switching mechanism further comprises a left handle 9 and a right handle 10 installed on the fixed plate 3, the left handle 9 corresponds to the left nozzle 1, and the right handle 10 corresponds to the right nozzle 2. The left handle 9 and the right handle 10 are the same in structure. The double-nozzle mechanism comprises an extrusion mechanism, which comprises a second driving mechanism 5, a wire feeding wheel 7, an axle 6, a left wire feeding idler 111, and a right wire feeding idler 112. The second driving mechanism 5 is in transmission connection with the axle 6, the axle 6 is sleeved with the wire feeding wheel 7, the left wire feeding idler 111 is arranged in the left handle 9, and the right wire feeding idler 112 is arranged in the right handle 10. The second driving mechanism 5 can be a stepping motor or other motors capable of achieving the same function. Taking the left handle 9 as an example, the left handle 9 is provided with a wire feeding channel 20, a wire feeding gap 131 is arranged between the left wire feeding idler 11 provided on the left handle 9 and the wire feeding wheel 7, and a material guide pipe 12 of the left nozzle 1 is aligned with the wire feeding gap 13. Similarly, the right handle 10 is provided with a wire feeding channel 20, a wire feeding gap 132 is arranged between the right wire feeding idler 112 provided on the right handle 10 and the wire feeding wheel 7, and a material guide pipe 12 of the right nozzle 2 is aligned with the wire feeding gap 132. The axle 6 is provided with a fixed rod 14, both ends of the fixed rod 14 are fixedly connected with the left handle 9 and the right handle 10 respectively, the left handle 9 rotates around a left end point 1401 of the fixed rod 14, and the right handle 10 rotates around a right end point 1402 of the fixed rod 14. The left handle 9 and the right handle 10 are each provided with a limiting screw 15, and the limiting screws 15 of the left handle 9 and the right handle 10 are clamped by an arc-shaped spring 28. The left handle 9 / right handle 10 rotates to the left side or the right side with the corresponding end point 1401 / 1402 as the rotation center, and the arc-shaped spring 28 ensures that the two handles have a pressing force inward, so as to press the wire feeding idler 11 on the corresponding handle to press the wire or release the wire.

[0036] The left handle 9 and the right handle 10 can feed different wires, for example, one handle feeds model material, and the other handle feeds support material. Referring to Figure 1 、 Figure 2 and Figure 5 , one wire enters the wire feeding gap 131 through the wire feeding channel 20 of the left handle 9, and the other wire enters the wire feeding gap 132 through the wire feeding channel 20 of the right handle 10. At this time, the interval of the wire feeding gap 131 is just enough to press the corresponding wire by the left wire feeding idler 111 and the wire feeding wheel 7, the wire feeding wheel 7 rotates to drive the wire to move to the material guide pipe 12, while the wire feeding gap 132 is too large, the right wire feeding idler 112 and the wire feeding wheel 7 cannot press the corresponding wire, and the corresponding wire does not move downward. As Figure 3As shown, when switching to right nozzle 2 printing, the distance between the yarn feeding slits 132 is reduced, the right yarn feeding idler 112 and the yarn feeding wheel 7 press the corresponding yarn to move downward, and the distance between the yarn feeding slits 131 is increased, the left yarn feeding idler 111 and the yarn feeding wheel 7 cannot press the corresponding yarn, and the corresponding yarn does not move downward.

[0037] As shown, Figures 1 to 5 The swing seat 4 is connected with a swing rod 16, the swing rod 16 is connected with a first driving mechanism 17, the swing rod 16 swings back and forth following the first driving mechanism 17, the swing rod 16 is provided with three vertices, the first vertex 1601 and the second vertex 1602 of the swing rod 16 are respectively in contact with one of the left handle 9 and the right handle 10 at different times, each vertex of the swing rod 16 is provided with a pulley 29, the left handle 9 and the right handle 10 are provided with a limiting slide 18, the limiting slide 18 is in contact with the pulley 29 on the first vertex 1601 or the second vertex 1602. The swing seat 4 is provided with a triangular frame 19, and the pulley 29 of the third vertex 1603 moves in the triangular frame 19 at the top of the swing seat 4.

[0038] As shown, Figure 2 and Figure 3 The pulleys 29 of the first vertex 1601 and the second vertex 1602 can slide along the limiting slide 18, and the third vertex 1603 moves in the triangular frame 19. The first vertex 1601 and the second vertex 1602 of the swing rod 16 are used to press or release the left handle 9 and the right handle 10.

[0039] As shown, Figure 1 and Figure 2 When the left handle 9 is in the vertical direction, the yarn feeding channel 20 on the handle, the yarn feeding slit 131 and the guide tube 12 of the nozzle form a vertical yarn channel. The vertical arrangement of the yarn channel facilitates the printing of the yarn.

[0040] The output shaft 21 of the second driving mechanism 5 is connected with a driving wheel 22, the driving wheel 22 is gear engaged with a driven wheel 23, the driven wheel 23 penetrates and is fixed with an axle 6, and the axle 6 is fixed with the yarn feeding wheel 7. The driving wheel 22 is a smaller diameter gear, the driven wheel 23 is a larger diameter gear, the driven wheel 23 drives the rotation of the axle 6 and the yarn feeding wheel 7, thereby playing the role of amplifying torque and reducing speed.

[0041] As shown, Figure 1 and Figure 2 The swing seat 4 is provided with a mounting groove 24 and a rotating pressing plate 25, as shown, Figure 2 The left and right nozzles are each provided with a connecting boss 26, the connecting boss 26 is matched with the mounting groove 24, the rotating pressing plate 25 rotates around a rotating shaft 27, and the rotating pressing plate 25 can press / release the connecting boss 26. The arrangement of the connecting boss 26 and the mounting groove 24 allows the nozzle to be quickly installed and disassembled, and the rotating pressing plate 25 presses the connecting boss 26 to prevent it from moving.

[0042] A mounting and switching nozzle method of a swing switching double-nozzle device, comprising the following steps:

[0043] (1) Two nozzles are respectively mounted into the mounting slot 24 of the swing seat 4 through the connecting boss 26, and after the mounting is completed, the rotating pressing plate 25 is rotated to the upper side of the connecting boss 26 to press the connecting boss 26 tightly by the rotating pressing plate 25;

[0044] (2) As shown in Figure 1 and Figure 2 , the initial state is that the left nozzle 1 is in the printing state, the left yarn passes through the yarn channel 20, the yarn gap 131 and the material guide pipe 12 into the left nozzle 1 in sequence, the left idle pulley 111 on the left handle is close to the yarn wheel 7 driven by the second driving mechanism 5, so as to press the yarn to move downward, and the printing of the left nozzle 1 is realized, at this time, the second vertex 1602 of the swing rod 16 abuts against the limiting slide 18 of the right handle 10, the first vertex 1601 does not contact the limiting slide 18 of the left handle, and the third vertex 1603 of the swing rod 16 is located at the left end point in the triangular frame 19 of the swing seat 4;

[0045] (3) As shown in Figure 3 , when the nozzles are switched, the first driving mechanism 17 rotates in the opposite direction, the third vertex 1603 of the swing rod 16 moves from the left end point to the right end point in the triangular frame 19, the swing seat 4 rotates clockwise, the first vertex 1601 of the swing rod 16 abuts against the limiting slide 18 of the left handle, the second vertex 1602 does not contact the limiting slide 18 of the right handle 10, the left handle rotates to the left side around the left end point of the left fixed rod 14, the right handle 10 and the right nozzle 2 are in the vertical position, the right yarn passes through the yarn channel 20, the yarn gap 13 and the material guide pipe 12 into the right nozzle 2 in sequence, the right idle pulley 112 on the right handle 10 is close to the yarn wheel 7 driven by the second driving mechanism 5, so as to press the yarn to move downward, and the printing of the right nozzle 2 is realized.

[0046] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited to this. Any simple change, equivalent replacement or modification made on the basis of the present application to solve the basically same technical problem and realize the basically same technical effect is covered in the protection scope of the present application.

Claims

1. A swing-to-switch dual-jet device, characterized by: The swing switching mechanism comprises a fixed plate, a swing seat and a first driving mechanism, the swing seat fixes the double nozzle mechanism, and the first driving mechanism drives the swing seat and the double nozzle mechanism to rotate; The double nozzle mechanism comprises at least two nozzles, a second driving mechanism and a wire feeding wheel connected to the second driving mechanism, the second driving mechanism drives the wire feeding wheel to rotate, the swing switching mechanism further comprises handles installed on the fixed plate, one handle corresponds to one nozzle, two nozzles are arranged at an angle, and a wire feeding idler wheel provided on the handle is arranged between the wire feeding wheel and the wire feeding gap. The handle is provided with a wire feeding channel, when one of the nozzles of the double nozzle mechanism is located in the vertical direction, the wire feeding channel on the handle, the wire feeding gap and the material guide pipe of the nozzle form a vertical wire feeding channel. The swing switching mechanism further comprises a swing rod, the swing rod is connected with the first driving mechanism, the swing rod swings back and forth following the first driving mechanism, and the swing rod is in transmission connection with the swing seat. The swing rod is provided with three vertices, the first vertex and the second vertex of the swing rod are respectively in contact with a single handle, and the third vertex of the swing rod is connected with the swing seat; the vertices of the swing rod are all provided with pulleys, the handle is provided with a limiting sliding way, the limiting sliding way is in close contact with the pulley on the first vertex or the second vertex, and the swing seat is provided with a triangular frame, and the pulley of the third vertex moves in the triangular frame.

2. The oscillating switching dual-jet device according to claim 1, characterized in that: The second driving mechanism is connected with an axle, the axle is sleeved with a fixed rod, the two ends of the fixed rod are respectively hinged with a single handle, the handle rotates around the end point of the fixed rod, each handle is provided with a limiting screw, and the limiting screws of the two handles are clamped through an arc-shaped spring.

3. The oscillating switching dual-jet device according to claim 1, wherein: The fixed plate is provided with a limiting block, and the limiting block can abut against the swing seat.

4. The oscillating switching dual-jet device according to claim 2, wherein: The output shaft of the second driving mechanism is connected with a driving wheel, the driving wheel is in gear engagement with a driven wheel, the driven wheel penetrates and is fixed with an axle, and the axle is provided with the wire feeding wheel.

5. The oscillating switching dual-jet device of claim 1, wherein: The swing seat is provided with a mounting groove and a rotating pressing plate, the nozzle is provided with a connecting boss matched with the mounting groove, the rotating pressing plate rotates around a rotating shaft, and the rotating pressing plate can press the connecting boss.

6. A method of installing and switching the oscillating switching double-jet device according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: (1) two nozzles are respectively installed into the mounting groove of the swing seat through the corresponding connecting boss, after the installation is completed, the rotating pressing plate is rotated to the upper side of the connecting boss to press the connecting boss; (2) The initial state is that the left nozzle is in printing state, the filament on the left side enters the left nozzle through the filament channel, the filament gap and the guide tube in turn, the filament feeding idler on the left handle is close to the filament feeding wheel driven by the second driving mechanism, so as to press the filament and make it move downward, realize the printing of the left nozzle, at this time, the second vertex of the swing rod abuts against the limiting slide of the right handle, the first vertex does not contact the limiting slide of the left handle, and the third vertex of the swing rod is located at the left end point in the triangular frame of the swing seat; (3) When switching the nozzle, the first driving mechanism rotates in the reverse direction, drives the swing seat to rotate, and simultaneously drives the third vertex of the swing rod to move from the left end point to the right end point in the triangular frame, the first vertex of the swing rod abuts against the limiting slide of the left handle, the second vertex does not contact the limiting slide of the right handle, the left handle rotates to the left side around the left end point of the left fixed rod, the right handle and the nozzle are in vertical position, the filament on the right side enters the right nozzle through the filament channel, the filament gap and the guide tube in turn, the filament feeding idler on the right handle is close to the filament feeding wheel driven by the second driving mechanism, so as to press the filament and make it move downward, realize the printing of the right nozzle.

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