Consumable cutting assembly, extrusion mechanism and 3D printing equipment

Abstract

The embodiment of the utility model provides a consumable cutting assembly which is used for cutting off consumables conveyed in the first direction and comprises a connecting part, a movable part and a pushing part. The connecting part is configured to allow the consumables to pass through the connecting part to be conveyed in the first direction; the movable part comprises a first movable main body, a heating piece and a cutting wire, the first movable main body is movably connected with the connecting part, the heating piece is thermally coupled with the cutting wire, and the cutting wire is connected with the first movable main body; and the pushing part is directly or indirectly connected with the first movable main body, and the pushing part is configured to push the first movable main body to drive the cutting wire to move in the second direction under the action of force so as to cut off the consumables conveyed in the first direction. The embodiment of the utility model further provides an extrusion mechanism applying the consumable cutting assembly and 3D printing equipment.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to consumable cutting components, extrusion mechanisms, and 3D printing equipment. 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 adhesive 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 eventually generate a physical object. Among them, fused deposition modeling (FDM) is a 3D printing technology that uses thermoplastic polymer materials. These materials are heated, melted, extruded, and deposited on the printing platform layer by layer to form a three-dimensional object. Furthermore, multi-color FDM printing technology refers to the use of multiple colors of plastic filaments for printing in one printing project, so that color or multi-color 3D models can be printed without the need for post-coloring or painting.

[0003] However, some 3D printers that currently support multi-color printing need to pause the printing process when printing models with multiple colors, and replace the consumables of different colors before continuing to print another color. This greatly affects printing efficiency, so it is necessary to optimize the material changing process and shorten the material changing time. Normally, when the printer changes materials, the consumables need to be withdrawn from the extruder nozzle, but the temperature of the nozzle is usually high at this time, which makes the front end of the consumables still in a molten state; directly pulling out the consumables will cause the end of the consumables to be rough, which is not conducive to subsequent printing and feeding; even the molten consumables may be brought into the extruder, causing damage to the printer. If the consumables are cut and then pulled out, on the one hand, the existing cutting method is not efficient, which will further increase the time consumed in material changing. On the other hand, the existing cutting method cannot ensure that the end of the consumables is flat, which may cause subsequent feeding to fail.

[0004] How to solve the above problems, improve the shearing efficiency of consumables, improve the quality of the withdrawn consumables, and improve the success rate of the next feeding is what technical personnel in this field need to consider. Utility Model Content

[0005] In order to solve the problems in the prior art, the embodiments of the present application provide a consumable cutting assembly, an extrusion mechanism and a 3D printing device with high shearing efficiency and high consumable recycling quality.

[0006] An embodiment of the present application provides a consumable material cutting assembly for cutting consumable material transported in a first direction, the consumable material cutting assembly comprising:

[0007] a connecting portion configured to allow the consumable to be transported therethrough in the first direction;

[0008] a movable portion comprising a first movable body, a heating element, and a cutting wire, wherein the first movable body is movably connected to the connecting portion, the heating element is thermally coupled to the cutting wire, and the cutting wire is connected to the first movable body;

[0009] The pushing portion is directly or indirectly connected to the first movable body, and is configured to push the first movable body under the action of force to drive the cutting wire to move in the second direction to cut off the consumables transmitted in the first direction.

[0010] In one embodiment, the movable portion further includes a tensioning elastic member connected to at least one end of the cutting wire.

[0011] In one embodiment, the cutting wire is made of a high-resistance alloy, and the heating element is a conductive structure electrically connected to the cutting wire;

[0012] At least two of the heating elements are spaced apart from each other, and the cutting wire is electrically connected to the at least two heating elements.

[0013] In one embodiment, the connecting portion includes:

[0014] a second movable body, disposed relative to the first movable body, the second movable body having a transport space for transporting the consumable material in a first direction;

[0015] The pushing portion is disposed outside the transmission space, and the pushing portion pushes the cutting wire to move along the second direction in the transmission space to cut the consumable material.

[0016] In one embodiment, the movable portion further comprises:

[0017] a reset element, which is arranged in the transmission space;

[0018] The resetting member has a force interaction relationship with the first movable body and / or the second movable body, and is used to reset the cutting wire.

[0019] In one embodiment, a guide groove is formed on the second movable body, and a guide protrusion is formed on the first movable body. The guide protrusion is movably disposed in the guide groove.

[0020] In one embodiment, the first movable body includes a sliding plate and a pushing plate connected to each other, and the sliding plate is provided with the guide protrusion;

[0021] The second movable body includes a guide plate, the transmission space is configured to pass through the guide plate, and the guide plate is provided with the guide grooves on both sides of the transmission space.

[0022] In one embodiment, the pushing plate is arranged to be raised along the first direction compared to the sliding plate;

[0023] The pushing plate is in detachable contact with the pushing portion at a side facing away from the second movable body;

[0024] The heating element and the cutting wire are provided on a side of the pushing plate facing the second movable body, and the resetting element is sandwiched between the sliding plate and the guide plate.

[0025] An embodiment of the present application also provides an extrusion mechanism, which includes an extrusion component and a consumable cutting component as described in any one of the above embodiments, the extrusion component is fixed to the connecting part, and the transmission channel passes through the extrusion component and further extends to the consumable cutting component.

[0026] An embodiment of the present application also provides a 3D printing device, including a device body, a printing platform, and a consumable material cutting assembly or extrusion mechanism as described in the above embodiment, wherein the consumable material cutting assembly and the printing platform are respectively movably connected to the device body.

[0027] It is understandable that the consumable cutting assembly, extrusion mechanism and 3D printing equipment of the present application use a cutting wire that is electrically conductive with the heating element to cut the consumables. The cutting wire is thermally coupled to the heating element so that it can have a suitable high temperature. Under the action of the high temperature of the cutting wire, the surface of the consumable being cut melts instantly, so that the cutting resistance encountered by the cutting wire when cutting the consumables is much smaller than the cutting resistance when cutting with a traditional blade, and thus does not cause the straight shape of the consumable to bend and deform, and can form a good cross-section; this not only improves the cutting efficiency of the consumables, but also improves the quality of the retracted consumables, thereby improving the success rate of the next feeding. At the same time, because the cutting resistance encountered by the cutting wire during cutting is small, the loss of the cutting wire itself is also small, and the service life of the cutting wire is longer than that of traditional blades, which shortens the replacement cycle of the cutting wire, directly reduces the cost of use, and improves the efficiency of continuous work from the side. Furthermore, for consumables of different materials, the cutting temperature of the cutting wire can be adjusted during cutting to correspond to the melting point of the consumable being cut, so as to achieve rapid cutting and improve the efficiency of material replacement. In order to ensure that the aforementioned cutting wire can stably cut the consumables, a connecting portion is provided that allows the transmission channel to pass through, that is, the consumables have a spatial layout that passes through the connecting portion; at the same time, the first movable body of the movable portion is slidably connected to the connecting portion, and the pushing portion is configured to push the first movable body under the action of force to drive the cutting wire to move in the second direction to cut off the consumables transmitted in the first direction, so that the cutting wire has a relatively stable actuation law when cutting the consumables, ensuring cutting efficiency and continuous cutting stability. The consumable cutting assembly of the present application can realize fast and effective cutting of consumables in extrusion mechanisms and 3D printing equipment, with a fast cutting speed and high success rate, and the cross-section of the end of the consumable after cutting is smooth and flat, which can effectively improve the success rate of the next feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional schematic diagram of a consumable cutting assembly provided in an embodiment of the present application at one angle.

[0029] Figure 2 This is a three-dimensional schematic diagram from another angle of the consumable cutting assembly provided in an embodiment of the present application.

[0030] Figure 3 This is a schematic plan view of the consumable cutting assembly provided in an embodiment of the present application from a top-down perspective.

[0031] Figure 4 A schematic diagram of a three-dimensional exploded view of the consumable cutting assembly provided in an embodiment of the present application.

[0032] Figure 5 A three-dimensional schematic diagram of a working state of the extrusion mechanism provided in an embodiment of the present application.

[0033] Figure 6 A three-dimensional schematic diagram of another working state of the extrusion mechanism provided in an embodiment of the present application.

[0034] Figure 7 A three-dimensional schematic diagram of the 3D printing device provided in an embodiment of the present application.

[0035] Description of main component symbols

[0036] Consumables cutting assembly 10

[0037] Activities Department 11

[0038] First activity subject 111

[0039] Sliding plate 1111

[0040] First bottom wall 11111

[0041] First side wall 11112

[0042] First opening 11113

[0043] Push plate 1112

[0044] Extension plate 1113

[0045] Guide protrusion 1114

[0046] Limiting protrusion 1115

[0047] Cutting wire 112

[0048] Heating element 113

[0049] Limit sleeve 1131

[0050] Conductive connecting column 1132

[0051] Lock nut 1133

[0052] Tension elastic member 114

[0053] Reset 115

[0054] Connecting portion 12

[0055] Second activity subject 121

[0056] Guide plate 1211

[0057] Second bottom wall 12111

[0058] Second side wall 12112

[0059] Second opening 12113

[0060] Through port 12114

[0061] External board 1212

[0062] Guide groove 1213

[0063] Transmission Space 122

[0064] Pushing unit 13

[0065] Rod body 131

[0066] Rotating end 1311

[0067] Toggle end 1312

[0068] Push end 132

[0069] Shaft 133

[0070] Extrusion assembly 20

[0071] Extrusion mechanism 100

[0072] Transmission channel 30

[0073] 3D printing equipment 1

[0074] Printing platform 40

[0075] Device body 50

[0076] First direction Z

[0077] Second direction X

[0078] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0079] The following description will refer to the accompanying drawings to more fully describe the contents of this 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 this application thorough and complete and to fully convey the scope of this application to those skilled in the art. Similar figure 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 this 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, "includes" 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 meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless otherwise expressly defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the content of this application, and should not be interpreted as idealized or overly formal. The following will describe exemplary embodiments with reference to the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and identical or similar components will be given the same or similar reference numerals or similar technical terms.

[0080] Generally, some 3D printers that currently support multi-color printing need to pause the printing process when printing models with multiple colors, and replace the consumables of different colors before continuing to print another color. This greatly affects printing efficiency, so it is necessary to optimize the material changing process and shorten the material changing time. Normally, when the printer changes materials, the consumables need to be withdrawn from the extruder nozzle, but the temperature of the nozzle is usually high at this time, which makes the front end of the consumables still in a molten state; directly pulling out the consumables will cause the end of the consumables to be rough, which is not conducive to subsequent printing and feeding; even the molten consumables may be brought into the extruder, causing damage to the printer. If the consumables are cut and then pulled out, on the one hand, the existing cutting method is not efficient, which will further increase the time consumed in material changing. On the other hand, the existing cutting method cannot ensure that the end of the consumables is flat, which may cause subsequent feeding to fail.

[0081] Therefore, an embodiment of the present application provides a consumable cutting assembly, which is used to cut off consumables transmitted in a first direction, and the consumable cutting assembly includes a connecting portion, a movable portion, and a pushing portion. The connecting portion is constructed to allow the consumables to pass through it and be transmitted in the first direction; the movable portion includes a first movable body, a heating element, and a cutting wire, the first movable body is movably connected to the connecting portion, the heating element is thermally coupled to the cutting wire, and the cutting wire is connected to the first movable body; the pushing portion is directly or indirectly connected to the first movable body, and the pushing portion is configured to push the first movable body under the action of a force to drive the cutting wire to move in the second direction to cut off the consumables transmitted in the first direction. At the same time, an embodiment of the present application also provides an extrusion mechanism and a 3D printing device using a consumable cutting assembly.

[0082] Among them, the consumable cutting assembly, extrusion mechanism and 3D printing equipment of the present application use a cutting wire that is electrically conductive with a heating element to cut the consumables. The cutting wire is thermally coupled to the heating element so that it can have a suitable high temperature. Under the action of the high temperature of the cutting wire, the surface of the consumable being cut melts instantly, so that the cutting resistance encountered by the cutting wire when cutting the consumables is much smaller than the cutting resistance when cutting with a traditional blade, and thus does not cause the straight shape of the consumables to bend and deform, and can form a good cross-section; this not only improves the cutting efficiency of the consumables, but also improves the quality of the retracted consumables, thereby improving the success rate of the next feeding. At the same time, because the cutting resistance encountered by the cutting wire during cutting is small, the loss of the cutting wire itself is also small, and the service life of the cutting wire is longer than that of traditional blades, which shortens the replacement cycle of the cutting wire, directly reduces the cost of use, and indirectly improves the efficiency of continuous work. Furthermore, for consumables of different materials, the cutting temperature of the cutting wire can be adjusted during cutting to correspond to the melting point of the consumable being cut, so as to achieve rapid cutting and improve the efficiency of material replacement. In order to ensure that the aforementioned cutting wire can stably cut the consumables, a connecting portion is provided that allows the transmission channel to pass through, that is, the consumables have a spatial layout that passes through the connecting portion; at the same time, the first movable body of the movable portion is slidably connected to the connecting portion, and the pushing portion is configured to push the first movable body under the action of force to drive the cutting wire to move in the second direction to cut off the consumables transmitted in the first direction, so that the cutting wire has a relatively stable actuation law when cutting the consumables, ensuring cutting efficiency and continuous cutting stability. The consumable cutting assembly of the present application can realize fast and effective cutting of consumables in extrusion mechanisms and 3D printing equipment, with a fast cutting speed and high success rate, and the cross-section of the end of the consumable after cutting is smooth and flat, which can effectively improve the success rate of the next feeding.

[0083] Those skilled in the art will understand that “cutting wire” refers to a filamentous material having sufficient toughness and also having the ability to conduct electricity.

[0084] Those skilled in the art will understand that "consumables" refer to rod-shaped thermoplastic materials that are in a solid state at room temperature. The consumables can be melted by heat and then cooled to form.

[0085] Those skilled in the art will understand that "3D printing equipment" refers to equipment that can achieve 3D printing (additive manufacturing).

[0086] The specific implementation methods of the present application will be described in detail below with reference to the accompanying drawings.

[0087] like Figures 1 to 4 As shown, an embodiment of the present application provides a consumable cutting assembly 10 for cutting consumables transported in a first direction Z. The consumable cutting assembly 10 includes a movable portion 11, a connecting portion 12, and a pushing portion 13. The connecting portion 12 is configured to allow the consumables to be transported therethrough in the first direction Y. The connecting portion 12 is movably connected to the movable portion 11, and the pushing portion 13 is in detachable contact with the movable portion 11. The pushing portion 13 is capable of displacement to push the movable portion 11 to move relative to the connecting portion 12, thereby enabling the movable portion 11 to be relatively displaced relative to the position of the transport channel 30, thereby ultimately achieving the cutting of the consumables located in the transport channel 30.

[0088] In one embodiment, the consumable cutting assembly 10 is constructed to cooperate with the transmission channel 30, and the transmission channel 30 is constructed to be arranged through the connecting part 12; the movable part 11 includes a first movable body 111, a heating element 113 and a cutting wire 112, the first movable body 111 is movably connected to the connecting part 12, the heating element 113 is configured to heat the cutting wire 112, and the cutting wire 112 is connected to the first movable body 111; the pushing part 13 is directly or indirectly connected to the first movable body 111, and the pushing part 13 is configured to push the first movable body 111 under the action of force to drive the cutting wire 112 to move in the second direction X to cut off the consumable transmitted in the first direction Z.

[0089] In this embodiment, the first direction Z corresponds to the extension direction of the transmission channel 30 or the transmission direction of the consumables, and the second direction X corresponds to the direction in which the first movable body 111 moves relative to the connecting portion 12 .

[0090] In one embodiment, the cutting wire 112 is made of a high-resistance alloy material, and the heating element 113 is a conductive structure electrically connected to the cutting wire 112 .

[0091] In this embodiment, the first movable body 111 is slidably connected to the connecting portion 12, and the cutting wire 112 is connected to the first movable body 111 via the heating element 113. The cutting wire 112 is electrically connected to the heating element 113 and is configured to cut consumables.

[0092] It is understood that the "high-resistance alloy material" can be at least one of an iron-chromium-aluminum alloy (0Cr27Al7Mo2), a nickel-chromium alloy (Cr20Ni80), and a high-resistance electric heating alloy (Cr20Ni30). The iron-chromium-aluminum alloy heating wire has excellent high-temperature resistance and oxidation resistance, making it suitable for high-temperature environments. The nickel-chromium alloy heating wire has a stable temperature coefficient of resistance, good mechanical properties, and corrosion resistance, making it suitable for applications requiring long-term, stable heating. The resistivity of the iron-chromium-aluminum alloy and the nickel-chromium alloy differs, with the iron-chromium-aluminum alloy having a relatively high resistivity and the nickel-chromium alloy having a relatively moderate resistivity. For example, the cutting wire 112 can be an iron-chromium-aluminum alloy heating wire with a room-temperature resistance of 48Ω, a power of 1000W, and a maximum temperature resistance of 1100°C. Alternatively, the cutting wire 112 can be a nickel-chromium alloy heating wire (brand Cr20Ni80) with a resistivity of 1.09-1.18×10^-6Ω·m, which has a high resistivity and good oxidation resistance.

[0093] In this embodiment, the push portion 13 includes a push end 132. The push end 132 is in detachable contact with a side of the first movable body 111 away from the cutting wire 112, and is used to push the first movable body 111 to cause the cutting wire 112 to move relative to the transmission channel 30 to cut the consumable material. In this embodiment, the push end 132 is located approximately in the middle of the push portion 13.

[0094] It can be understood that in the consumable cutting assembly 10 of the present application, a connecting portion 12 is provided that allows the transmission channel 30 to pass through, that is, the consumable has a spatial layout passing through the connecting portion 12; at the same time, the first movable body 111 of the movable portion 11 is slidingly connected to the connecting portion 12, and the pushing portion 13 is configured to push the first movable body 111 under the action of force to drive the cutting wire 112 to move in the second direction X to cut off the consumable transmitted in the first direction Y, so that the cutting wire 112 has a relatively stable actuation law when cutting the consumable, thereby ensuring the efficiency of the cutting wire 112 in cutting the consumable and the repeated stability of continuous cutting.

[0095] It can be understood that the consumables are cut using a cutting wire 112 that is electrically conductive with the heating element 113. The cutting wire 112 is thermally coupled to the heating element 113 so that it can have a suitable high temperature. Under the action of the high temperature of the cutting wire 112, the surface of the consumable being cut melts instantaneously, so that the cutting resistance encountered by the cutting wire 112 when cutting the consumables is much smaller than the cutting resistance when cutting with a traditional blade, and thus will not cause the straight shape of the consumables to bend and deform, and can form a good cross-section; this can not only improve the shearing efficiency of the consumables, but also improve the quality of the withdrawn consumables, thereby improving the success rate of the next feeding. At the same time, since the cutting resistance encountered by the cutting wire 112 during cutting is small, the loss of the cutting wire 112 itself is also small, and the service life of the cutting wire 112 is longer than that of a traditional blade, which shortens the replacement cycle of the cutting wire 112, directly reduces the cost of use, and indirectly improves the efficiency of continuous work. Furthermore, for consumables of different materials, the cutting temperature of the cutting wire 112 can be changed by adjusting the current passing through the cutting wire 112 during cutting, corresponding to the melting point of the consumable being cut, to achieve rapid cutting and improve material replacement efficiency.

[0096] In one embodiment, the connecting portion 12 includes a second movable body 121, which is disposed relative to the first movable body 111. The second movable body 121 has a transmission space 122 for transporting the consumable material in a first direction Z. The transmission space 122 allows the transmission channel 30 to pass through the connecting portion 12. The cutting wire 112 is disposed corresponding to the transmission space 122. The pushing portion 13 is located outside the transmission space 122. The pushing portion 13 is used to push the cutting wire 112 to move across the area where the transmission channel 30 is located to cut the consumable material. It will be understood that the distance each movement of the cutting wire 112 is at least greater than the diameter of the transmission channel 30, or at least greater than the diameter of the consumable material, so that each movement of the cutting wire 112 can completely cut the consumable material horizontally, ensuring that the consumable material is severed.

[0097] In one embodiment, the second movable body 121 includes a connected guide plate 1211 and an external plate 1212. The external plate 1212 is arranged to protrude in the first direction Z relative to the guide plate 1211. The guide plate 1211 is provided with a through-hole 12114 extending along the first direction Z. The guide plate 1211 and the external plate 1212 cooperate to define a transmission space 122. The transmission space 122 is open at least along the first direction Z. The transmission channel 30 extends through the guide plate 1211 via the through-hole 12114, allowing the consumable material to pass through the connecting portion 12. The external plate 1212 can be used to securely connect to the extrusion assembly 20 of the extrusion mechanism 100, thereby connecting the consumable material cutting assembly 10 to the extrusion assembly 20. It also secures the relative position between the consumable material cutting assembly 10 and the extrusion assembly 20, facilitating a more rational transmission channel 30 through the extrusion assembly 20 and the consumable material cutting assembly 10.

[0098] In one embodiment, a guide groove 1213 is defined on the second movable body 121. The guide groove 1213 extends in a direction corresponding to the second direction X, which intersects the first direction Z. In this embodiment, the second direction X is perpendicular to the first direction Z, and the cutting wire 112 cuts the consumable material vertically. Simultaneously, a guide groove 1213 is defined on each side of the guide plate 1211 facing the transmission space 122. The projection of the guide plate 1211 along the first direction Z is roughly C-shaped. Two guide grooves 1213 are defined on the inner side of the guide plate 1211 facing the transmission space 122. The two guide grooves 1213 are located on the inner side of the C-shaped guide plate 1211 and correspond to opposite sides of the transmission channel 30.

[0099] In one embodiment, a guide protrusion 1114 is provided on the first movable body 111. The guide protrusion 1114 protrudes toward the outside of the first movable body 111. The extending sliding direction of the guide protrusion 1114 corresponds to the second direction X, which intersects the first direction Z. The guide protrusion 1114 is movably disposed in the guide groove 1213, slidably connecting the first movable body 111 and the second movable body 121. The guide protrusion 1114 is used to guide the movement direction of the first movable body 111, causing the first movable body 111 to move relative to the second movable body 121 along the guide protrusion 1114 and the second direction X, thereby determining the direction in which the cutting wire 112 moves toward or away from the transmission channel 30, or more precisely, determining the cutting direction of the cutting wire 112 when cutting the consumable material.

[0100] In one embodiment, the first movable body 111 includes a connected sliding plate 1111 and a push plate 1112. The push plate 1112 is arranged to protrude relative to the sliding plate 1111 along the first direction Z. A guide protrusion 1114 is provided on each side of the sliding plate 1111 opposite the push plate 1112. In this embodiment, the projection of the sliding plate 1111 along the first direction Z is generally C-shaped. Two guide protrusions 1114 are provided on the outer side of the sliding plate 1111 facing away from the transmission space 122. The two guide protrusions 1114 are located on the outer side of the C-shaped sliding plate 1111 and correspond to opposite sides of the transmission channel 30.

[0101] In this embodiment, the guide plate 1211 and the sliding plate 1111, both of which are C-shaped when projected along the first direction Z, are arranged with their openings facing each other. The sliding plate 1111 includes a first bottom wall 11111 and two first side walls 11112. The two first side walls 11112 are respectively connected to opposite ends of the first bottom wall 11111. The two first side walls 11112 are located on the same side of the first bottom wall 11111. The ends of the two first side walls 11112 not connected to the first bottom wall 11111 are spaced apart to form a first opening 11113, so that the projections of the sliding plate 1111 along the first direction Z are all C-shaped. A guide protrusion 1114 is provided on the outer side of each first side wall 11112 facing away from the first bottom wall 11111. The push plate 1112 is connected to the first bottom wall 11111. The guide plate 1211 includes a second bottom wall 12111 and two second side walls 12112. The two second side walls 12112 are respectively connected to the two opposite ends of the second bottom wall 12111. The two second side walls 12112 are located on the same side of the second bottom wall 12111. The ends of the two second side walls 12112 not connected to the second bottom wall 12111 are spaced apart from each other to form a second opening 12113, so that the projection of the guide plate 1211 along the first direction Z is "C"-shaped. Each second side wall 12112 is provided with a guide groove 1213 facing the inner side of the other two side walls, and the external plate 1212 is connected to the second bottom wall 12111. The second opening 12113 is larger than the first opening 11113 . The two first side walls 11112 are movably disposed between the two second side walls 12112 . The external plate 1212 and the pushing plate 1112 are opposite and spaced apart from each other. The transmission channel 30 is located between the external plate 1212 and the pushing plate 1112 .

[0102] In one embodiment, a heating element 113 and a cutting wire 112 are provided on the side of the push plate 1112 facing the external plate 1212. The side of the push plate 1112 facing away from the external plate 1212 is in releasable contact with the push portion 13. The movable portion 11 includes two heating elements 113, spaced apart and disposed on the same side of the first movable body 111 facing away from the push end 132. The cutting wire 112 is electrically connected to the two heating elements 113.

[0103] In this embodiment, the heating element 113 includes a limiting sleeve 1131, a conductive connecting post 1132, and a locking nut 1133. The limiting sleeve 1131 is connected to the push plate 1112, and the conductive connecting post 1132 is disposed through the push plate 1112 and the limiting sleeve 1131. The nut end of the conductive connecting post 1132 abuts against the side of the push plate 1112 facing away from the limiting sleeve 1131. The locking nut 1133 is threadedly connected to the other end of the conductive connecting post 1132. The cutting wire 112 is locked to the end of the limiting sleeve 1131 facing away from the push plate 1112 via the locking nut 1133, and the cutting wire 112 is electrically connected to the heating element 113 via the locking nut 1133.

[0104] It is understandable that by sandwiching a section of the cutting wire 112 between the two heating elements 113, the section of the cutting wire 112 can be made to have a length and placement form that allows the consumables to be completely cut across the transmission channel 30. At the same time, the section of the cutting wire 112 located between the two heating elements 113 is electrically connected to the two heating elements 113 to form a path, and the section of the cutting wire 112 can be energized by current to generate heat. It is understandable that the two heating elements 113 must be electrically connected to another external power source (not shown in the figure), and the form of electrical connection between the two heating elements 113 and the external power source can be a known and feasible method in the prior art, such as by connecting two wires to the power supply of the extrusion assembly 20 or the power supply of the 3D printing device 1 to achieve electrical connection, which will not be elaborated here.

[0105] In one embodiment, the movable portion 11 further includes a tensioning elastic member 114 connected to at least one end of the cutting wire 112. The cutting wire 112 is sequentially connected to one heating element 113, another heating element 113, and one end of the tensioning elastic member 114. The other end of the tensioning elastic member 114 is fixed to the first movable body 111, and the tensioning elastic member 114 is in a stretched state.

[0106] In this embodiment, the first movable body 111 further includes an extension plate 1113, which is connected to the guide plate 1211 and the push plate 1112. The extension plate 1113 is located on the side of the push plate 1112 away from the guide plate 1211. The other end of the tensioning elastic member 114 is bolted to the end of the extension plate 1113 away from the push plate 1112, allowing the tensioning elastic member 114 to be stretched. In this embodiment, a guide protrusion 1114 on the first side wall 11112 can further extend to the outside of the extension plate 1113.

[0107] As can be understood, one end of the tensioning elastic member 114 is fixedly connected to the first movable body 111, and the other end is connected to one end of the cutting wire 112, and the other end of the cutting wire 112 is fixedly connected to the heating element 113. The tensioning elastic member 114 in the stretched state exerts an inward contraction force, so that the cutting wire 112 is always in a taut state, and the taut cutting wire 112 has a better cutting effect.

[0108] In one embodiment, the movable portion 11 further includes a reset member 115 disposed in the transmission space 122. The reset member 115 has a force interaction relationship with the first movable body 111 and / or the second movable body 121, and is used to reset the cutting wire 112.

[0109] In one embodiment, the reset member 115 can be reset in various ways, such as by elastic force or magnetic force. Specifically, the reset member 115 can be a compression spring, a torsion spring, a tension spring, a magnet, etc. Accordingly, the phrase "the reset member 115 has a force interaction relationship with the first movable body 111 and / or the second movable body 121" can be understood to mean that different types of reset members 115 have different connection relationships with the first movable body 111 and / or the second movable body 121. For example, if the reset member 115 is a tension spring, the two ends of the reset member 115 can be connected to the first movable body 111 and the second movable body 121 respectively; if the reset member 115 is a compression spring, the two ends of the reset member 115 can be connected to and / or abutted against the first movable body 111 and the second movable body 121 respectively; if the reset member 115 is a torsion spring, the reset member 115 can be provided on the pushing portion 13, and by pushing the pushing portion 13, it further drives the first movable body 111; if the reset member 115 is a magnet, the reset member 115 can include two magnets with corresponding placement relationships respectively provided on the first movable body 111 and the second movable body 121, and the first movable body 111 and the second movable body 121 are driven to move closer to or away from each other by magnetic force. It can be understood that the above examples can all achieve the reset of the cutting wire 112.

[0110] In this embodiment, the reset member 115 corresponding to the compression spring is taken as an example for demonstration. The reset member 115 is clamped between the sliding plate 1111 and the guide plate 1211. The two ends of the reset member 115 are respectively connected to the first movable body 111 and the second movable body 121. The reset member 115 is in a naturally extended or compressed state. The reset member 115 is used to push the second movable body 121 toward the side close to the pushing part 13 to reset the cutting wire 112.

[0111] In this embodiment, the first movable body 111 further includes two limiting protrusions 1115, each located at the end of the first side wall 11112 facing away from the first bottom wall 11111. Taking the reset member 115 as a spring as an example, one end of each reset member 115 is respectively mounted on a limiting protrusion 1115 to position the reset member 115 and prevent it from being misplaced; the other end of each reset member 115 is in detachable contact with the side of the second bottom wall 12111 facing the first bottom wall 11111. In other embodiments, the reset member 115 may also be other types of reset structures, such as a torsion spring, a magnetic reset structure, etc., which are not described here.

[0112] In one embodiment, the pushing portion 13 is generally rod-shaped and includes a rod body 131 having two opposite ends, namely a rotating end 1311 and a toggle end 1312. The pushing end 132 is connected to the rod body 131 and is located between the rotating end 1311 and the toggle end 1312. The toggle end 1312 can be touched to rotate the rod body 131. The rotating end 1311 is rotatably connected to an external fixed structure (not shown) to enable the rod body 131 to rotate about the rotating end 1311. The pushing end 132 is located between the rotating end 1311 and the toggle end 1312 and extends toward the side of the movable portion 11 relative to the rod body 131.

[0113] It can be understood that the rotating end 1311 can be rotatably connected to an external fixed structure (not shown), for example, it can be connected to a support plate (not shown) of the extrusion mechanism 100 or to a driven bracket (not shown) of the 3D printing device 1. The specific connection method can be a known and feasible solution in the prior art, which will not be described here. The rotating end 1311 is rotatably connected to the external fixed structure through a rotating shaft 133, and the contact with the toggle end 1312 causes the rod body 131 to rotate as a whole, thereby causing the pushing end 132 to push the movable part 11. Since the pushing end 132 is located between the rotating end 1311 and the toggle end 1312, the force of the pushing end 132 to push the movable part 11 can be adjusted with the help of the lever principle. For example, when the rod body 131 is under pressure, a force-saving lever can be formed to reduce the initial pressure required for cutting.

[0114] Further integration Figure 5 and Figure 6 As shown, an embodiment of the present application also provides an extrusion mechanism 100, which includes an extrusion component 20 and a consumable cutting component 10 as any one of the aforementioned embodiments, the extrusion component 20 is fixed to the connecting part 12, and the transmission channel 30 passes through the extrusion component 20 and further extends to the consumable cutting component 10.

[0115] like Figure 5Figure 1 shows the extrusion mechanism 100 before cutting the consumable material. The structural features shown in this state are: the pusher 13 is not moved, the cutting wire 112 is spaced apart from the transmission channel 30 and located on the side of the transmission channel 30 away from the external plate 1212, and the reset member 115 can be in a naturally extended state or a slightly compressed state.

[0116] like Figure 6 The figure shows a schematic diagram of the state of the extrusion mechanism 100 after it has completed cutting the consumable material. The structural features shown in this state are as follows: the toggle end 1312 is toggled, causing the rod body 131 to be pressed downward with the rotating end 1311 as the axis until it contacts the housing of the extrusion assembly 20 to reach the limit of travel. The push end 132 has pushed the first movable body 111 to slide relative to the second movable body 121. The first movable body 111 drives the cutting wire 112 through the area where the transmission channel 30 is located to complete the cutting of the consumable material. The cutting wire 112 is located on the side of the transmission channel 30 away from the push plate 1112, and the reset member 115 is in a compressed state.

[0117] In one embodiment, the extrusion assembly 20 is connected to the external plate 1212 of the connecting portion 12. The extrusion assembly 20 is located on one side of the movable portion 11. The transmission channel 30 passes through the extrusion assembly 20 and further extends through the transmission space 122. The extrusion assembly 20 may include a drive (not shown) and a gear (not shown) for extruding consumables. The extrusion assembly 20 may use a known and feasible solution in the prior art, which will not be described in detail here. It can be understood that the extreme position of the pushing end 132 pushing the movable portion 11 corresponds to the position where the rod body 131 rotates to abut against the extrusion assembly 20.

[0118] Further integration Figure 7 As shown, an embodiment of the present application also provides a 3D printing device 1, including a device body 50, a printing platform 40, and a consumable material cutting assembly 10 or an extrusion mechanism 100 as in the aforementioned embodiment, wherein the consumable material cutting assembly 10 and the printing platform 40 are respectively movably connected to the device body 50.

[0119] The consumable cutting assembly 10 of the present application can realize fast and effective cutting of consumables in the extrusion mechanism 100 and the 3D printing device 1. It has a fast cutting speed and a high success rate, and the cross-section of the end of the consumable after cutting is smooth and flat, which can effectively improve the success rate of the next feeding.

[0120] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are within the scope of the present application.

Claims

1. A consumable cutting assembly, characterized in that: For cutting off consumables transported in a first direction, the consumable cutting assembly comprises: a connecting portion configured to allow the consumable to be transported therethrough in the first direction; a movable portion comprising a first movable body, a heating element, and a cutting wire, wherein the first movable body is movably connected to the connecting portion, the heating element is thermally coupled to the cutting wire, and the cutting wire is connected to the first movable body; The pushing portion is directly or indirectly connected to the first movable body, and is configured to push the first movable body under the action of force to drive the cutting wire to move in the second direction to cut off the consumables transmitted in the first direction.

2. The consumable material cutting assembly according to claim 1, wherein: The activity section also includes: A tensioning elastic member is connected to at least one end of the cutting wire.

3. The consumable material cutting assembly according to claim 1 or 2, characterized in that: The cutting wire is made of a high-resistance alloy, and the heating element is a conductive structure electrically connected to the cutting wire; At least two of the heating elements are spaced apart from each other, and the cutting wire is electrically connected to the at least two heating elements.

4. The consumable material cutting assembly according to claim 1, wherein: The connecting portion includes: a second movable body, disposed relative to the first movable body, the second movable body having a transport space for transporting the consumables in a first direction; The pushing portion is disposed outside the transmission space, and the pushing portion pushes the cutting wire to move along the second direction in the transmission space to cut the consumable material.

5. The consumable material cutting assembly according to claim 4, characterized in that: The activity section also includes: a reset element, which is arranged in the transmission space; The resetting member has a force interaction relationship with the first movable body and / or the second movable body, and is used to reset the cutting wire.

6. The consumable material cutting assembly according to claim 5, characterized in that: A guide groove is provided on the second movable body, and a guide protrusion is provided on the first movable body. The guide protrusion is movably arranged in the guide groove.

7. The consumable material cutting assembly according to claim 6, wherein: The first movable body includes a sliding plate and a pushing plate connected to each other, and the sliding plate is provided with the guide protrusion; The second movable body includes a guide plate, the transmission space is configured to pass through the guide plate, and the guide plate is provided with the guide grooves on both sides of the transmission space.

8. The consumable material cutting assembly according to claim 7, wherein: The pushing plate is arranged to protrude along the first direction compared to the sliding plate; The pushing plate is in detachable contact with the pushing portion at a side facing away from the second movable body; The heating element and the cutting wire are provided on a side of the pushing plate facing the second movable body, and the resetting element is sandwiched between the sliding plate and the guide plate.

9. An extrusion mechanism, characterized in that: It includes an extrusion component and a consumable cutting component as described in any one of claims 1 to 8, the extrusion component is fixed to the connecting part, the extrusion mechanism is provided with a transmission channel, and the transmission channel passes through the extrusion component and further extends to the consumable cutting component.

10. A 3D printing device, characterized in that: include: Equipment body; Printing platform; as well as The consumable material cutting assembly according to any one of claims 1 to 8 or the extrusion mechanism according to claim 9, wherein the consumable material cutting assembly and the printing platform are respectively movably connected to the device body.

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