3D printer with silk material cutting function

Abstract

The utility model discloses a 3D printer with a silk material cutting function, which comprises a spray head assembly, a material cutting assembly and a movement mechanism for driving the spray head assembly to move, a silk material channel for silk materials to pass through is arranged in the spray head assembly, the material cutting assembly comprises an impact block and a cutter assembly, the impact block is arranged on a base of the 3D printer, and the cutter assembly is arranged on the base. The cutter assembly is arranged on the spray head assembly and comprises a cutter and a cutter handle, the cutter handle is rotatably connected to the spray head assembly, the cutter is fixedly connected with the cutter handle, the cutter is arranged towards the silk material channel, and the cutter handle can abut against the impact block to be stressed under driving of the movement mechanism. The cutter handle rotates around the rotating center of the cutter handle and drives the cutter to move towards the wire channel end so as to transversely cut off wires in the wire channel. The wire material is cut off by arranging the impact block and adopting the mode of controlling the movement mechanism, an additional power source does not need to be arranged, the cost is reduced, and the automation degree of the 3D printer is improved.

Description

Technical Field

[0001] The utility model relates to the field of 3D printing, in particular to a 3D printer with a wire material cutting function. Background Art

[0002] The FDM (fused deposition modeling) 3D printer heats the nozzle assembly at high temperature to melt the printing filament and deposit it onto the printing platform. When the melted printing filament contacts the printing platform, it cools and quickly solidifies. The nozzle assembly deposits the printing material layer by layer onto the printing platform along a set printing path, thereby constructing a model with a three-dimensional structure.

[0003] The current FDM printing technology is becoming more and more mature, the market is becoming more and more extensive, and higher and higher requirements are put forward for the convenience of using the machine. At present, most machines on the market do not have a filament cutter on the nozzle assembly. It is difficult to disassemble when the nozzle is blocked or the filament needs to be replaced. It may be necessary to disassemble the entire nozzle assembly to remove the filament. Even if some manufacturers have a filament cutter, it is not so convenient to cut the filament. An additional cutter power source needs to be set up to cut the filament, which increases the cost of the machine. Summary of the invention

[0004] In order to solve the above technical problems, the utility model provides a 3D printer with a wire cutting function.

[0005] The utility model adopts the following technical solutions:

[0006] A 3D printer with a wire cutting function comprises a nozzle assembly, a cutting assembly and a motion mechanism for driving the nozzle assembly to move, wherein a wire channel for passing wire is provided in the nozzle assembly, the cutting assembly comprises an impact block and a cutter assembly, the impact block is arranged on a base of the 3D printer, the cutter assembly is arranged on the nozzle assembly, the cutter assembly comprises a cutter and a cutter handle, the cutter handle is rotatably connected to the nozzle assembly, the cutter is fixedly connected to the cutter handle, the cutter is arranged toward the wire channel, and the cutter handle can resist the impact block under the drive of the motion mechanism, so that the cutter handle rotates around its rotation center and drives the cutter to move toward the end of the wire channel to cross-cut the wire in the wire channel.

[0007] Compared with the prior art, the utility model has the following advantages: the material cutting component has a simple structure, low cost, and is easy to use. When it is necessary to change the material or disassemble the hot end, the wire material can be cut by the material cutting component, thereby replacing the new wire material / disassembling the hot end. By setting the impact block and using the control motion mechanism to make the cutter handle actively hit the impact block to achieve the cutting of the wire material, there is no need to set an additional power source, which reduces the cost and improves the automation degree of the 3D printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a partial structural schematic diagram of an implementation mode of a 3D printer with a wire material cutting function of the utility model;

[0009] Figure 2 for Figure 1 The schematic diagram of the nozzle assembly and the cutting assembly structure shown (the cutter handle is in a non-working state at this time);

[0010] Figure 3 for Figure 1 The schematic diagram of the nozzle assembly and the cutting assembly structure shown (the cutter handle is in working state at this time);

[0011] Figure 4 It is a schematic diagram of the structure of the cutter handle, the cutter and the elastic member;

[0012] Figure 5 It is a schematic diagram of the structure of the impact block and the impact block fixing seat;

[0013] Figure 6 Schematic diagram of the structure of the impact block. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0015] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0017] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0018] See also Figure 1-Figure 6 , is an implementation of a 3D printer with a wire cutting function. The 3D printer 100 includes a nozzle assembly 1, a wire cutting assembly 2, a motion mechanism 3 that drives the nozzle assembly to move, and a base 4. The motion mechanism 3 is disposed on the base 4. The nozzle assembly 1 is connected to the motion mechanism 3 in a transmission manner. Driven by the motion mechanism 3, the nozzle assembly 1 can move in the X / Y / Z axis directions.

[0019] The nozzle assembly 1 includes a hot end assembly 11, an extrusion mechanism 12 and a nozzle fixing seat 13, and the hot end assembly 11 and the extrusion mechanism 12 are both fixed to the nozzle fixing seat 13. A wire material channel 14 for passing the wire material 5 is provided in the nozzle assembly 1, and the extrusion mechanism 12 includes an active wire feeding wheel and a passive wire feeding wheel. The active wire feeding wheel is driven by a driving motor, and the gap between the active wire feeding wheel and the passive wire feeding wheel serves as a part of the wire material channel 14, so that the wire material 5 can be transported to the hot end assembly 11. The hot end assembly 11 includes a heat sink 111, a throat 112, a heating block 113 and a nozzle 114. The upper end of the throat 112 is provided with a heat sink 11, and a wire material channel 14 is also provided in the heat sink 111. The heating block 113 is arranged below the heat sink 111 and surrounds part of the throat 112. The nozzle 114 is arranged below the throat 112, and the heated and melted wire material 5 is extruded from the nozzle 114. The throat 112 and the nozzle 114 are both part of the wire material channel 14. The wire material 5 passes through the gap between the active wire feeding wheel and the passive wire feeding wheel and is heated by the heating block 113 to a molten state, and then extruded onto a printing platform (not shown in the drawings), and a 3D object is manufactured layer by layer.

[0020] The cutting assembly 2 includes a cutter assembly 21, which is arranged on the nozzle assembly 1 and is specifically connected to the nozzle fixing seat 13 of the nozzle assembly 1. The cutter assembly 21 includes a cutter 211, a cutter handle 212 and an elastic member 213. The cutter handle 212 is rotatably connected to the nozzle fixing seat 13 through a fixing member 15, and its rotation center, i.e., the axis of the fixing member 15, is located at the first end 2121 of the cutter handle 212. Figure 2 Taking the direction shown as an example, the rotation center is located at the lower end of the cutter handle 212.

[0021] The cutter 211 is fixedly connected to the cutter handle 212. The cutter 211 is arranged near the fixing member 15 and arranged toward the wire material channel 14. Specifically, the cutter 211 is arranged toward the wire material channel 14 between the extrusion mechanism 12 and the hot end assembly 11. When the cutter assembly 21 is not working, the cutter 211 is located at one side of the wire material channel 14. The elastic member 213 abuts between the cutter handle 212 and the nozzle fixing seat 13. Specifically, the cutter handle 212 is provided with a limiting groove 2123 toward the wire material channel 14, and the nozzle fixing seat 13 is provided with a limiting column 131. The limiting column 131 protrudes toward the side where the cutter handle 212 is located. One end of the elastic member 213 is located in the limiting groove 2123, and the other end of the elastic member 213 is sleeved on the outer periphery of the limiting column 131. The elastic member 213 can provide a certain elastic force to automatically reset the cutter handle 212 when the cutter 211 cuts the wire 5.

[0022] The cutter handle 212 also has an extension portion 2124, which extends from the end where the fixing member 15 is located in a direction away from the main body of the cutter handle 212. The nozzle fixing seat 13 is provided with a limiting portion 132, which is used to limit the initial position of the cutter handle 212. When the cutter handle 212 is not working, the extension portion 2124 abuts against the limiting portion 132, and the cutter handle 212 cannot rotate around the rotation center away from the wire channel 14.

[0023] The nozzle fixing seat 13 is provided with a sliding groove 133, and the cutter 211 is partially located in the sliding groove 133. Under the action of external force, the cutter handle 21 rotates around its rotation center to drive the cutter 211 to slide a certain distance along the sliding groove 133, thereby driving the cutter 211 to move toward the end of the wire channel 14 and transversely cut off the wire 5 located in the wire channel 14.

[0024] In order to detect whether the wire 5 is cut, a detection mechanism is also provided between the nozzle assembly 1 and the material cutting assembly 2. The detection mechanism can be a detection mechanism such as a distance sensor, a Hall sensor, a strain gauge, etc. that can detect the position of the handle. Specifically, a magnet 22 can be provided at the second end 2122 of the cutter handle 212 away from the fixing member 15, and a Hall sensor 23 can be provided on the nozzle fixing seat 13. When the cutter handle 212 rotates around its rotation center under the action of an external force to the position where the cutter 211 cuts the wire, as shown in FIG. Figure 3 As shown, at this position, the magnetic field emitted by the magnet 22 can just be detected by the Hall sensor 23, and the Hall sensor 23 outputs a signal indication.

[0025] When the hot end assembly 11 is blocked and needs to be disassembled, the cutter assembly 21 can be manually cut by pressing the cutter handle 212 by hand so that the cutter 211 cuts the wire material 5, making it easier to remove the hot end assembly 11.

[0026] In addition, the automatic material cutting can also be realized by the cooperation between the impact block 24 and the motion mechanism 3. The material cutting assembly 2 also includes the impact block 24 and the impact block fixing seat 25. The impact block fixing seat 25 is fixed on the base 4. The impact block 24 is fixedly connected to the impact block fixing seat 25. The top of the impact block 24 is arranged toward the nozzle assembly 1. When it is necessary to change the wire, the 3D printer control system controls the motion mechanism 3 to move to the position where the impact block 24 is located. Figure 2 As shown, at this time, the impact block 24 just contacts the cutter handle 212, and then the motion mechanism 3 is controlled to drive the nozzle assembly 1 to move to the side where the impact block 24 is located. The cutter handle 212 rotates around its rotation center through the reverse force of the impact block 24 on the cutter handle 212, thereby driving the cutter 211 to cut the wire material. When the Hall sensor 23 detects the magnetic field signal, the motion mechanism 3 is stopped from continuing to move toward the side where the impact block 24 is located, and the motion mechanism 3 is controlled to move in the reverse direction, and the cutter handle 212 is automatically reset under the action of the elastic member 213. By setting the impact block 24 and controlling the motion mechanism 3 to make the cutter handle 212 actively hit the impact block 24 to achieve the cutting of the wire material 5, there is no need to set up an additional power source, which reduces costs and improves the automation level of the 3D printer.

[0027] In order to prevent other parts of the nozzle assembly 1 from accidentally hitting the impact block 24 and causing damage to the nozzle assembly 1, the impact block fixing seat 25 is also provided with a torsion spring 26 and a rotating shaft 27. A receiving cavity 250 is formed between the top and the bottom of the impact block fixing seat 25, and the rotating shaft 27 is arranged between the top and the bottom of the impact block fixing seat 25. The impact block 24 includes an impact portion 241, a rotating shaft mounting portion and a torsion spring mounting groove 244. The rotating shaft mounting portion includes a first rotating shaft mounting portion 242 and a second rotating shaft mounting portion 243 arranged at a certain interval relative to each other. The first rotating shaft mounting portion 242 and the second rotating shaft mounting portion 243 are respectively provided with a through hole 240 that penetrates in the axial direction. The rotating shaft mounting portion is located in the receiving cavity 250. The torsion spring mounting groove 244 is located between the first rotating shaft mounting portion 242 and the second rotating shaft mounting portion 243. The rotating shaft 27 passes through the first rotating shaft mounting portion 242, the torsion spring 26, and the second mounting portion 243 in sequence and is fixed to the impact block fixing seat 25. One end of the torsion spring 26 abuts against the impact block fixing seat 25. When the other parts of the nozzle assembly 1 except the cutter handle 212 hit the impact part 241, the impact block 24 can rotate to the side where the torsion spring 26 is located by a certain angle under the action of the torsion spring 26, thereby avoiding the nozzle assembly 1, preventing the nozzle assembly 1 from being damaged due to continuous force on the nozzle assembly 1.

[0028] The above are only preferred embodiments of the present invention. The protection scope of the present invention shall be based on the scope defined by the claims. Several improvements and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall also be regarded as the protection scope of the present invention.

Claims

1. A 3D printer with a wire cutting function, comprising a nozzle assembly, a wire cutting assembly and a motion mechanism for driving the nozzle assembly to move, wherein the nozzle assembly is provided with a wire channel for passing the wire, characterized in that: The material cutting assembly includes an impact block and a cutter assembly, wherein the impact block is arranged on the base of the 3D printer, and the cutter assembly is arranged on the nozzle assembly. The cutter assembly includes a cutter and a cutter handle, and the cutter handle is rotatably connected to the nozzle assembly. The cutter is fixedly connected to the cutter handle, and the cutter is arranged toward the wire channel. Driven by the motion mechanism, the cutter handle can resist the force of the impact block, so that the cutter handle rotates around its rotation center and drives the cutter to move toward the end of the wire channel to cross-cut the wire located in the wire channel.

2. The 3D printer with a filament cutting function as claimed in claim 1, characterized in that: The material cutting assembly also includes an impact block fixing seat, which is fixed on the base, the impact block is fixedly connected to the impact block fixing seat, and the top end of the impact block is arranged toward the nozzle assembly.

3. The 3D printer with a filament cutting function according to claim 1, characterized in that: The impact block fixing seat is provided with a torsion spring and a rotating shaft. The impact block is sleeved on the outer circumference of the rotating shaft. The torsion spring is located between the impact block fixing seat and the impact block. The impact block can rotate around the rotating shaft through the torsion spring.

4. The 3D printer with a filament cutting function according to claim 1, characterized in that: The material cutting assembly further comprises an elastic member, and the elastic member abuts between the cutter handle and the nozzle assembly.

5. The 3D printer with a filament cutting function as claimed in claim 4, characterized in that: The cutter handle is provided with a limiting groove toward the wire channel side, the nozzle assembly includes a nozzle fixing seat, the nozzle fixing seat is provided with a limiting column, the limiting column protrudes toward the side where the cutter handle is located, one end of the elastic member is located in the limiting groove, and the other end of the elastic member is sleeved on the outer periphery of the limiting column.

6. The 3D printer with a filament cutting function as claimed in claim 5, characterized in that: The cutter handle also has an extension portion, which extends from one end where the rotation center of the cutter handle is located in a direction away from the cutter handle body. The nozzle fixing seat is provided with a limiting portion, and the limiting portion is used to limit the initial position of the cutter handle.

7. The 3D printer with a filament cutting function as claimed in claim 6, characterized in that: A detection mechanism is also provided between the nozzle assembly and the material cutting assembly.

8. The 3D printer with a filament cutting function as claimed in claim 7, characterized in that: The detection mechanism comprises a magnet and a Hall sensor. The magnet is arranged at the second end of the cutter handle away from the rotation center, and the Hall sensor is arranged on the nozzle fixing seat.

9. The 3D printer with a filament cutting function as claimed in claim 3, characterized in that: The impact block includes an impact portion, a rotating shaft mounting portion and a torsion spring mounting groove, the rotating shaft mounting portion includes a first rotating shaft mounting portion and a second rotating shaft mounting portion which are arranged at a certain interval relative to each other, the first rotating shaft mounting portion and the second mounting portion are respectively provided with a through hole which penetrates axially, the rotating shaft mounting portion is located between the top and the bottom of the impact block fixing seat, the torsion spring mounting groove is located between the first rotating shaft mounting portion and the second rotating shaft mounting portion, and the rotating shaft passes through the first rotating shaft mounting portion, the torsion spring and the through hole in the second mounting portion in sequence and is fixed to the impact block fixing seat.

10. The 3D printer with a filament cutting function as claimed in claim 5, characterized in that: The nozzle assembly comprises a hot end assembly and an extrusion mechanism, the hot end assembly and the extrusion mechanism are fixed to the nozzle fixing seat, and the cutter is arranged toward the wire material channel between the extrusion mechanism and the hot end assembly.

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