3D printing nozzle material cutting device

Abstract

The invention relates to a 3D printing spray head material cutting device in the technical field of 3D printing. The 3D printing spray head material cutting device comprises a spray head mechanism, a guide part for guiding the spray head mechanism to move under the driving of a driving unit, and a cutter which is arranged in the spray head mechanism and can transversely move to cut off a wire material; a shifting block is fixed to one end of the guide part, the outer wall of the side, corresponding to the shifting block, of the spray head mechanism is rotationally connected with a swing rod capable of swinging inwards to abut against the cutter to advance for cutting, and a rod body of the swing rod is provided with a cutter pulling part capable of pulling the cutter to retreat and reset when swinging outwards; the swing end of the swing rod is folded back to form a hook part for clamping the shifting block in a matched mode, and a hook head of the hook part is lower than a hook tail, so that when the spray head mechanism gets close to the shifting block, the hook tail can abut against the shifting block earlier than the hook head and drive the swing rod to swing inwards to get close to the spray head mechanism, and when the spray head mechanism gets away from the shifting block, the shifting block can abut against the hook head to drive the swing rod to swing outwards; according to the material cutting device, an additional driving source does not need to be added, and the cutting and resetting effects of the cutter can be guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular to a 3D printing nozzle material cutting device. BACKGROUND

[0002] The current 3D printer extrusion nozzle on the market generally sets a material cutting mechanism, which is mainly used for switching the material with a multi-color consumable box, and some models integrate a material cutting detection function in the cutting mechanism to ensure the continuity and stability of the printing process. According to the control mode of the cutter, the prior art is divided into two categories. One is shown in the Chinese patent with the publication number CN111531884A, which directly drives the cutter to move by using an electric pole, but this increases the driving source inside the extrusion nozzle, which not only occupies space, but also increases the weight and cost. The other is to use a magnet or an elastic structure to drive the cutter to cut and reset, but this "soft drive" is prone to the situation that the two cut materials clamp the cutter and cannot rebound after cutting, and the relatively soft material will cause the cutter to be stuck and the cutting to be incomplete. SUMMARY

[0003] In order to overcome the deficiencies in the background art and solve the existing technical problems, the present application discloses a 3D printing nozzle material cutting device, which does not need to increase an additional driving source and can ensure the cutting and resetting effects of the cutter.

[0004] To achieve the above-mentioned purposes, the present application adopts the following technical solutions: A 3D printing nozzle material cutting device, comprising a nozzle mechanism, a guide piece for guiding the nozzle mechanism to move under the driving of a driving unit, and a cutter arranged in the nozzle mechanism and capable of cutting the material transversely; one end of the guide piece is fixed with a push block, one side of the nozzle mechanism corresponding to the push block is rotationally connected with a swing rod capable of swinging inward to resist the cutter to cut the material, the rod body of the swing rod is provided with a pull cutter piece capable of pulling the cutter to retreat and reset when swinging outward; the swing end of the swing rod is folded to form a hook portion matched with the push block, and the hook head of the hook portion is lower than the hook tail, so that when the nozzle mechanism approaches the push block, the hook tail can first resist the push block to drive the swing rod to swing inward and approach the nozzle mechanism, and when the nozzle mechanism moves away from the push block, the push block can resist the hook head to drive the swing rod to swing outward.

[0005] Further, the rear end of the cutter is provided with a folded edge, the pull cutter piece is a pull rod, one end of the pull rod is fixed to the rod body of the swing rod, and the other end of the pull rod is provided with a hook groove corresponding to the folded edge of the cutter.

[0006] Further, the pull cutter piece is a pull rope connected between the rear end of the cutter and the corresponding rod body of the swing rod.

[0007] Further, the nozzle mechanism comprises an extrusion assembly and a nozzle assembly, and the cutter is slidingly arranged in a sliding channel between the extrusion assembly and the nozzle assembly.

[0008] Further, the swing rod is rotatably arranged on the corresponding side wall of the nozzle mechanism through a rotating shaft, and the rotating shaft has a rotating damping property.

[0009] Further, the bending part of the hook part is arc-shaped corresponding to the pushing block, and the hook part has elasticity.

[0010] Further, the axial included angle of the hook head and the hook tail is 25-40 degrees, and when the hook head contacts the pushing block, a gap is formed between the hook tail and the pushing block.

[0011] Further, the guide is an X-axis guide rod, a Y-axis guide rod or a Z-axis guide rod, and the nozzle mechanism is driven to move along the guide by a belt mechanism driven by a motor.

[0012] By adopting the technical scheme, the application has the following beneficial effects: The 3D printing nozzle material cutting device disclosed in the application has the following advantages: the power source for cutting the material comes from the moving driving unit required by the nozzle mechanism during printing, and a cutting driving source for controlling the movement of the cutter is not needed, thereby reducing the cost and weight and maintaining the delicacy of the nozzle mechanism; more importantly, by designing the swing rod and the hook part and under the moving assistance of the nozzle mechanism, the cutter can be driven to move forward to cut the material when the cutter collides with the pushing block, and the rear leg of the cutter can be driven to reset when the nozzle mechanism moves back to reset, thereby ensuring the functionality of forced resetting of the cutter, and even when the cutter is applied to materials with different hardness, the cutter will not be stuck, the continuous working stability of the device is greatly improved, and the device can be applied to most multi-color extrusion assemblies. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic diagram of the embodiment of the application; Figure 2 is a structural schematic diagram of the hook tail about to contact the pushing block; Figure 3 is a structural schematic diagram of the swing rod driving the cutter to cut the material and then about to swing outward.

[0014] In the figure: 1, nozzle mechanism; 2, guide; 3, swing rod; 4, hook part; 401, hook tail; 402, hook head; 5, pushing block; 6, rotating shaft; 7, cutter; 701, folded edge; 8, pull rod; 801, hook groove. DETAILED DESCRIPTION

[0015] In the following, the technical solutions of the present application will be described with reference to the accompanying drawings of the embodiments of the present application. In the description, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "back", "left", "right" and the like only corresponds to the accompanying drawings of the present application, and is for the convenience of describing the present application, and does not indicate or imply that the device or element to be indicated must have a particular orientation.

[0016] In conjunction with the accompanying drawings Figures 1-3 The 3D printing nozzle material cutting device comprises a nozzle mechanism 1, a guide 2 for guiding the movement of the nozzle mechanism 1 under the drive of a drive unit, and a cutter 7 arranged in the nozzle mechanism 1 and capable of moving transversely to cut the material; generally, the guide 2 is provided as an X-axis guide rod, a Y-axis guide rod or a Z-axis guide rod, and the specific design is determined according to the design situation; the nozzle mechanism 1 is driven to move along the guide 2 by a belt mechanism driven by a motor, which is a common motion mechanism for three-dimensional movement of a 3D printer, and will not be described in detail here; in addition, the nozzle mechanism 1 comprises an extrusion assembly and a nozzle assembly, and the existing cutter 7 is generally slidingly arranged in a sliding groove between the extrusion assembly and the nozzle assembly; the sliding groove can ensure the linear movement of the cutter 7; the inner port of the sliding groove corresponds to the material, and the outer port of the sliding groove is exposed; the material is extruded from the extrusion assembly and fed into the nozzle assembly; the cutter 7 can cut the material as long as it slides forward; As shown in the accompanying drawings Figure 1 The guide 2 is provided as an X-axis guide rod, the nozzle mechanism 1 is hung on one side of the upper surface of the X-axis guide rod, the upper surface of one end of the guide 2 is fixed with a block 5, the block 5 is exposed at one end corresponding to the hanging direction of the nozzle mechanism 1, and a swing rod 3 capable of swinging inward is rotatably connected to the outer wall of one side of the nozzle mechanism 1 corresponding to the block 5, so as to abut against the rear end of the cutter 7 exposed from the sliding groove to advance and cut the material; specifically, the swing rod 3 is rotatably installed on the corresponding side wall of the nozzle mechanism 1 through a vertical rotating shaft 6, and the rotating shaft 6 has a rotating damping property to ensure that the swing rod 3 will not swing randomly during the movement of the nozzle mechanism 1 and will not be directly forced to swing; the rod body of the swing rod 3 is provided with a pull cutter member capable of pulling the cutter 7 back to reset when the rod body swings outward; as needed, as shown in the accompanying drawings Figure 3 The rear end of the cutter 7 is provided with a folded edge 701, the pull cutter member is provided as a pull rod 8, one end of the pull rod 8 is fixed to the rod body of the swing rod 3 close to the rotating shaft 6 and away from the block 5, and the other end of the pull rod 8 is provided with a hook groove 801 corresponding to the folded edge 701 of the cutter 7; the folded edge 701 is clamped in the hook groove 801, so that when the swing rod 3 swings outward, the cutter 7 is pulled out by hooking the folded edge 701; alternatively, the pull cutter member can also be provided as a pull rope connected between the rear end of the cutter 7 and the corresponding rod body of the swing rod 3; because the pull rod 8 is a small-amplitude rotating action, and the cutter 7 is a linear action, the use of a flexible pull rope can also eliminate the influence of action conversion; The swing end of the swing lever 3 is folded to the side of the push block 5 to form a hook portion 4 which is adapted to clamp the exposed end of the push block 5. The hook portion 4 can be an integral structure with the swing lever 3 to ensure the connection strength and service life. The hook head 402 of the hook portion 4 is lower than the hook tail 401, that is, the hook portion 4 is limited in the upward tilting range. When the nozzle mechanism 1 approaches the push block 5, the hook tail 401 can first contact the push block 5 to drive the swing lever 3 to swing inwards to approach the nozzle mechanism 1, and at the same time, drive the cutter 7 to advance to cut the material. When the nozzle mechanism 1 moves away from the push block 5 along the guide member 2, the push block 5 can contact the hook head 402 to drive the swing lever 3 to swing outwards, and at the same time, pull the cutter 7 to retreat to reset. According to the needs, the axial angle between the hook head 402 and the hook tail 401 is 25-40 degrees, and specifically, it can be 30 degrees. When the hook head 402 contacts the push block 5, there is a gap between the hook tail 401 and the push block 5. In addition, the bending portion of the hook portion 4 is arc-shaped corresponding to the push block 5, and the hook portion 4 has elasticity. Considering the conversion between linear motion and swing motion, such a design structure is to ensure that the push block 5 can more easily contact the hook head 402 when approaching, and the push block 5 can more easily separate from the hook portion 4 when moving away, according to the design structure of the hook portion 4.

[0017] The 3D printing nozzle material cutting device is implemented. When the nozzle mechanism 1 needs to change the color of the material at the end of a printing process, the hook tail 401 of the hook portion 4 can contact and finally clamp the push block 5 by controlling the nozzle mechanism 1 to move along the guide member 2, so as to drive the swing lever 3 to swing inwards and push the cutter 7 to advance along the slide to complete the cutting action. Then, when the nozzle mechanism 1 moves away from the push block 5, the push block 5 can contact the hook head 402 to drive the swing lever 3 to swing outwards, and under the action of the pull member, the cutter 7 is quickly pulled out to reset.

[0018] The parts not described in detail in the present application are prior art. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the above embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A 3D printing nozzle filament cutting device, comprising a nozzle mechanism (1), a guide (2) guiding the nozzle mechanism (1) to move under the drive of a driving unit, and a cutter (7) arranged in the nozzle mechanism (1) and capable of moving transversely to cut the filament, characterized in that: One end of the guide (2) is fixed with a dial block (5), the nozzle mechanism (1) corresponding to the dial block (5) one side outer wall rotationally connected with the inside swing to resist the cutter (7) forward cutting material's swing lever (3), the swing lever (3) the rod body is equipped with the outside swing when can pull cutter (7) retreat reset's pull cutter piece;The swing end of the swing lever (3) is backfolding and forms the hook part (4) that adapts to dial block (5) card, and the hook head (402) of the hook part (4) is lower than the hook tail (401), so that when the nozzle mechanism (1) is close to the dial block (5), the hook tail (401) can be prior to the hook head (402) and resist the dial block (5), drive the swing lever (3) inside swing close to the nozzle mechanism (1), and when the nozzle mechanism (1) is away from the dial block (5), the dial block (5) can resist the hook head (402) and drive the swing lever (3) outside swing.

2. The 3D printing nozzle breakage apparatus of claim 1, wherein: The rear end of the cutter (7) is provided with a folded edge (701), the pull cutter piece is provided as a pull rod (8), one end of the pull rod (8) is fixed to the rod body of the swing lever (3), the other end of the pull rod (8) is provided with a hook groove (801) corresponding to the folded edge (701) of the cutter (7).

3. The 3D printing nozzle breakage apparatus of claim 1, wherein: The pull cutter piece is provided as a pull rope connected to the rear end of the cutter (7) and the corresponding rod body of the swing lever (3).

4. The 3D printing nozzle breakage apparatus of claim 1, wherein: The nozzle mechanism (1) comprises an extrusion assembly and a nozzle assembly, and the cutter (7) is slidingly arranged in a slide between the extrusion assembly and the nozzle assembly.

5. The 3D printing nozzle breakage apparatus of claim 1, wherein: The swing lever (3) is rotatably installed on the corresponding side wall of the nozzle mechanism (1) through a rotating shaft (6), and the rotating shaft (6) has a rotating damping property.

6. The 3D printing nozzle breakage apparatus of claim 1, wherein: The bending part of the hook part (4) is arc-shaped corresponding to the dial block (5), and the hook part (4) has elasticity.

7. The 3D printing nozzle breakage apparatus of claim 1, wherein: The axial angle between the hook head (402) and the hook tail (401) is 25-40 degrees, and when the hook head (402) contacts the dial block (5), the hook tail (401) has a gap with the dial block (5).

8. The 3D printing nozzle breakage apparatus of claim 1, wherein: The guide (2) is provided as an X-axis guide rod, a Y-axis guide rod or a Z-axis guide rod, and the nozzle mechanism (1) is driven to move along the guide (2) by a belt mechanism driven by a motor.

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