WO2023125921A1 - 一种打印控制方法、存储介质及多耗材自动切换挤出装置 - Google Patents

一种打印控制方法、存储介质及多耗材自动切换挤出装置 Download PDF

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Publication number
WO2023125921A1
WO2023125921A1 PCT/CN2022/143861 CN2022143861W WO2023125921A1 WO 2023125921 A1 WO2023125921 A1 WO 2023125921A1 CN 2022143861 W CN2022143861 W CN 2022143861W WO 2023125921 A1 WO2023125921 A1 WO 2023125921A1
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WIPO (PCT)
Prior art keywords
consumable
consumables
channel
feeding channel
discharge
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PCT/CN2022/143861
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English (en)
French (fr)
Inventor
廖启铭
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深圳市纵维立方科技有限公司
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Publication of WO2023125921A1 publication Critical patent/WO2023125921A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to the technical field of 3D printing, in particular to a printing control method, a storage medium and an automatic switching extrusion device for multi-consumable materials.
  • the present invention is proposed to provide a printing control method, a storage medium, and a multi-consumable automatic switching extrusion device that overcome the above problems or at least partially solve the above problems.
  • a printing control method is provided, which is applied to a multi-consumable automatic switching extrusion device, and the multi-consumable automatic switching extrusion device is provided with a consumable extrusion module for driving the feeding channel
  • the consumables in the material enter the discharge channel or retreat
  • the multi-consumable automatic switching extrusion device also includes a plurality of feed channels and a discharge channel, and a cutting module on the discharge channel
  • the method include:
  • the obtaining the consumable replacement signal and identifying the target feeding channel corresponding to the consumable replacement signal include:
  • the multi-consumable automatic switching extrusion device is provided with a consumable extrusion module, which is used to drive the consumables in the feeding channel into the discharge channel or retreat, and the multi-consumable automatic switching extrusion
  • the device also includes a plurality of feed channels and a discharge channel, as well as a cutting module on the discharge channel, which controls the consumables corresponding to the current feed channel to return to the set position, and the consumables corresponding to the current feed channel During the process of the consumables returning to the set position, the end of the consumables corresponding to the current feeding channel is cut off, including:
  • the consumables corresponding to the current feeding channel are controlled to retreat to the second set position through the consumables extruding module.
  • the discharge channel is correspondingly provided with a discharge position sensor, and each of the feed channels is correspondingly provided with a feed position sensor;
  • the controlling the consumable corresponding to the current feeding channel to return to the first set position through the consumable extrusion module includes:
  • the consumable material corresponding to the current feed channel is controlled through the consumable material extrusion module, and if the material cut-off signal corresponding to the discharge position sensor is obtained, the consumable material return corresponding to the current material channel is controlled through the consumable material extrusion module. Back off the first preset distance;
  • the controlling the consumable corresponding to the current feeding channel to return to the second set position through the consumable extrusion module includes:
  • the multi-consumable automatic switching extrusion device is provided with a consumable extrusion module, which is used to drive the consumables in the feeding channel into the discharge channel or retreat, and the multi-consumable automatic switching extrusion
  • the device also includes a plurality of feed channels and a discharge channel, and a cutting module on the discharge channel, the discharge channel is correspondingly provided with a discharge position sensor, and the consumables corresponding to the target feed channel are controlled
  • the end moves to the print head of the 3D printer, including:
  • the consumable material corresponding to the target channel is controlled to advance a second preset distance.
  • the method further includes:
  • the multi-consumable automatic switching extrusion device is applied to a 3D printer, and before the consumables corresponding to the current feeding channel are controlled to fall back to the set position, the method further includes:
  • the method further includes:
  • the multi-consumable automatic switching extrusion device is respectively provided with an indicator light for characterizing the use status of the feed channel corresponding to each of the feed channels; after identifying the target feed channel corresponding to the consumable replacement signal ,Also includes:
  • a computer-readable storage medium the computer-readable storage medium is used for storing program code, and the program code is used for executing the printing control described in any one of the first aspect method.
  • a multi-consumable automatic switching extrusion device includes a processor and a memory:
  • the memory is used to store program codes and transmit the program codes to the processor
  • the processor is configured to execute the printing control method described in any one of the first aspects according to instructions in the program code.
  • the invention provides a printing control method, a storage medium, and a multi-consumable automatic switching extrusion device.
  • the invention provides a printing control method, which can be applied to a multi-consumable automatic switching extrusion device.
  • Ronger realizes the replacement of printing consumables, realizes the automatic switching of multiple consumables without manual operation, and transitions the consumables from multiple feeding channels to a common one
  • the discharge channel ensures smooth delivery of consumables and reduces the load on the extrusion motor.
  • the printing method of the present invention can realize the automatic switching of multiple consumables without manual operation, and can cut off the irregular part of the front end of the consumables when the consumables are returned, so as to ensure that the consumables will not be blocked or jammed when the consumables are used again , realize the replacement of consumables, the replacement of consumables is simple, and it is convenient to realize multi-color printing of 3D printers.
  • Fig. 1 shows a schematic structural diagram of a multi-consumable automatic switching extrusion device in a 3D printing device according to an embodiment of the present invention
  • Figure 2 shows a schematic diagram of the connection between a multi-consumable automatic switching extrusion device and a print head according to an embodiment of the present invention
  • FIG. 3 shows a schematic flowchart of a printing control method according to an embodiment of the present invention
  • Fig. 4 shows an exploded schematic diagram of an extrusion device for automatically switching multi-consumables in a 3D printing device according to an embodiment of the present invention
  • Fig. 5A shows a schematic diagram of a consumable extrusion module in a multi-consumable automatic switching extrusion device according to an embodiment of the present invention
  • Fig. 5B shows a partial structural schematic diagram of the consumable extrusion module in the multi-consumable automatic switching extrusion device according to the embodiment of the present invention
  • FIG. 6 shows a schematic structural view of the camshaft assembly in the consumable extrusion module shown in FIG. 5A;
  • FIG. 7 shows a schematic diagram of the principle of the camshaft assembly in the consumable extrusion module shown in FIG. 5A;
  • Fig. 8 shows a schematic diagram of the press rod assembly in the consumable extrusion module shown in Fig. 5A;
  • Fig. 9 shows a schematic structural diagram of the consumable cutting module in the multi-consumable automatic switching extrusion device according to the embodiment of the present invention.
  • Fig. 10 shows a schematic diagram of a transition piece in a multi-consumable automatic switching extrusion device according to an embodiment of the present invention
  • An embodiment of the present invention provides a printing control method, which can be applied to a 3D printing device with a multi-consumable automatic switching extrusion device, wherein the 3D printing device includes a multi-consumable automatic switching extrusion device and a 3D printer, and a multi-consumable automatic switching extrusion device
  • the output device can be used to realize the automatic switching of consumables of different colors and materials.
  • Fig. 1 shows a schematic diagram of the overall structure of a multi-consumable automatic switching extrusion device in a 3D printing device according to an embodiment of the present invention.
  • the multi-consumable automatic switching extrusion device described in this embodiment is equipped with multiple feeding A channel 100 and a discharge channel 200 , wherein the feed channel can be used to accommodate consumables of different colors and materials, and each feed channel 100 can be connected to the discharge channel 200 .
  • Figure 2 shows a schematic diagram of the connection between the multi-consumables automatic switching extrusion device and the print head of the 3D printer according to an embodiment of the present invention. It is connected with the printing head 300 of the 3D printing device.
  • Fig. 1 and Fig. 2 schematically show five feeding channels. In practical applications, the number of feeding channels can be set according to different requirements, which is not limited in the embodiment of the present invention.
  • Fig. 4 shows an exploded view of the multi-consumable automatic switching extrusion device in the 3D printing device according to an embodiment of the present invention
  • Fig. 5A to Fig. 10 respectively show the schematic diagrams of the components of the multi-consumable automatic switching extrusion device.
  • the multi-consumable automatic switching extrusion device provided in this embodiment may at least include a housing 600 , a consumable extrusion module 400 , a consumable cutting module 500 and a transition piece 700 .
  • the housing 600 includes a housing cover plate 610 and two housing side plates 620 .
  • the consumable material extruding module in this embodiment is used to drive the consumable material in the feed channel into the discharge channel or retreat.
  • the consumable extrusion module 400 may include a camshaft assembly 410, a camshaft motor 420, an extrusion wheel 430, an extrusion motor 440, a pressing rod assembly 450 and a micro switch PCB board 460, etc. .
  • the camshaft assembly 410 is installed on the camshaft motor 420, and the camshaft assembly 410 can be driven to rotate by the camshaft motor 420; the extrusion wheel 430 is connected to the extrusion motor 440, and the extrusion wheel 430 can be driven by the extrusion motor 440 to rotate
  • the pressing rod assembly 450 is located between the camshaft assembly 410 and the extrusion wheel 430, the consumables can pass between the pressing rod assembly 450 and the extrusion wheel 430, and the consumable extrusion module 400 drives the camshaft assembly through the camshaft motor 420 410 selectively depresses any of the pressing rods in the pressing rod assembly 450, so that the consumables in the feed channel corresponding to the pressed pressing rods in the plurality of feeding channels 100 and the extrusion wheel 430 clamp the consumables , to extrude the filament corresponding to the channel.
  • the transition piece 700 is located between the die rod assembly 450 and the extrusion wheel 430 .
  • the micro switch PCB board 460 includes a plurality of feed position sensors, the number of the feed position sensors corresponds to the number of cams of the camshaft assembly 410, and is used to detect whether there is a consumable in the feed channel corresponding to the cam, if a feed channel If there are consumables in the feed channel, the feed position sensor corresponding to the feed channel will send out a material supply signal. If there is no consumable material in a feed channel, then the feed position sensor corresponding to the feed channel will send out a material cut signal.
  • the camshaft assembly 410 includes a plurality of cams 411 arranged in a staggered manner, five in this embodiment, and the plurality of cams 411 are arranged next to each other in sequence, and first cams are respectively arranged on both sides of the plurality of cams 411.
  • Shaft stopper 412 and second camshaft stopper 413 There is a protrusion on the second camshaft stopper 413, which is used to reset the camshaft motor 420 to zero by blocking the stepper motor when the camshaft motor 420 returns to zero; 412, a plurality of cams 411, and the second camshaft block 413 are connected in sequence.
  • the pressing rod assembly 450 includes a plurality of pressing rods 451 corresponding to each cam, a pressing pulley 452, a return spring 453, a return spring limit block 454, a pressing rod slider 455, a pressing material Rod shaft 456, pressure relief spring 457.
  • the quantity of pressing rod 451 corresponds to the quantity of feed channel
  • a plurality of pressing rods 451 are arranged side by side, and one end of pressing rod 451 is provided with the through hole that can pass through for pressing shaft 456, to be connected by pressing shaft 456
  • There are a plurality of pressing rods 451 and a corresponding pressing pulley 452 is provided at the bottom of each pressing rod 451 to cooperate with the camshaft assembly 410 to compress consumables.
  • each pressing rod 451 is equipped with back-moving spring 453, and back-moving spring limit block 454 is provided with corresponding each back-moving spring 453, and corresponding each back-moving spring 453 is provided with limit groove, when pressing material rod 451 is subjected to the active force of cam 411, The corresponding return spring 453 is compressed to the limit slot corresponding to the return spring limit block 454 .
  • Both ends of the pressing shaft 456 are provided with a pressing rod slider 455 , and a pressure relief spring 457 is arranged on the pressing rod sliding block 455 . When the pressing rod 451 bears excessive pressure, the pressing rod slider 455 compresses the pressure relief spring 457 in the opposite direction of the pressure.
  • the five cams 411 can be assembled adjacent to each other and staggered by 60°, so that when the camshaft motor 420 drives the camshaft assembly 410 to rotate, only one pressing rod is pressed down each time.
  • the extrusion wheel 430 can be in a neutral state, that is, the pressing rods of channels 1-5 are not pressed down, and the consumables are all in a loose state; at 60°, the camshaft assembly 410 is pressed Press down rod 1, the consumables in channel 1 are in a compressed state, channels 2-5 are in a loose state; at 120°, the camshaft assembly 410 presses down rod 2, the consumables in channel 2 are in a compressed state, channel 1, 3-5 are in the loose state; and so on.
  • the pressing pulley 424 cooperates with the camshaft assembly 410 to complete the function of pressing the consumables.
  • the return spring 453 is gradually compressed, and the pressing The pulley 452 presses the consumables;
  • the convex point of the cam 411 gradually turns away from the position of the pressing rod 451, the return spring 453 starts to reset, the pressing pulley 452 releases the consumables, and the pressing rod 451 returns to the initial position.
  • the pressing rod slider 455 compresses the pressure relief spring 457 upwards, so that the pressing force between the pressing pulley 452 and the extrusion wheel 430 is within a certain range to avoid damage to the consumables.
  • the multi-consumable automatic switching extrusion device includes a consumable cutting module 500 arranged on the discharge channel.
  • the consumable material cutting module 500 is mainly used to cut off the irregular part of the front end of the consumable material when the consumable material is retracted, and discharge the cut part of the consumable material out of the passage, and record the retracted signal through the discharge position sensor correspondingly arranged in the discharge passage.
  • the consumables cutting module 500 may include a steering gear 510 , a cutter assembly 520 , a discharge assembly 530 , an outlet assembly 540 and a first bracket 550 .
  • the cutter assembly 520 and the discharge assembly 530 are disposed between the steering gear 510 and the outlet assembly 540, and are fixedly connected to the steering gear 510 through the first bracket 550 to jointly form a discharge channel.
  • the cutter assembly 520 and the discharge assembly 530 are all connected with the steering gear 510,
  • the steering gear 510 drives the discharging assembly 530 to clamp the consumables, the steering gear 510 also drives the cutter assembly to cut off the consumables, and the steering gear 510 drives the beater assembly to loosen the cut consumables, to eject the cut consumables.
  • the cutter assembly 520 includes a blade turntable 521, a blade 522, a turntable gland 523, a turntable connection bolt (not shown), etc.
  • the blade turntable 521 is provided with a slot for limiting the blade
  • the blade 522 is installed on the blade turntable 521.
  • the draw-in groove on the top install the turntable gland 523 again to compress the blade 522, and utilize the turntable connecting bolt to fix the turntable 521 and the turntable gland 523.
  • the surface of the turntable cover 523 includes a circular arc portion and a concave portion, and the turntable cover 523 is used for contacting the discharge assembly 530 .
  • the discharge assembly 530 includes a discharge block 531, a bearing (not shown), a tension spring 533 with a hook, and a bearing connecting bolt (not shown).
  • the consumables cutting module 500 shown in FIG. 9 is provided with two discharge blocks 531 , and the two discharge blocks 531 are arranged symmetrically and form a storage space for accommodating the cutter assembly 520 .
  • the first end of the discharge block 531 is provided with a groove for accommodating a bearing, and the bearing is arranged in the groove on the discharge block 531 .
  • the belt hook extension spring 533 is also positioned at the first end of the discharge block 531, and the two ends of the belt hook extension spring 533 are provided with through holes for bearing connecting bolts to pass through, and the two bearing connecting bolts pass through the belt hook extension spring 533 and the Bearing, thereby fixedly connect belt hook extension spring 533 and discharge block 531.
  • the second end of the discharge block 531 is opposite to the first end, and the second end of the discharge block 531 is used for holding consumables.
  • the first end of the discharge block 531 is in contact with the turntable cover 523, and the turntable cover 523 rotates with the driving of the steering gear.
  • the distance from the second end of the discharge block 531 remains unchanged, and the consumables can be clamped;
  • the distance between the first ends of the two discharge blocks 531 becomes shorter under the tension of the tension spring 533 with a hook, and the distance between the second ends of the two discharge blocks 531 becomes longer, so that Release the consumable or eject the clamped consumable.
  • the position of the blade 522 corresponds to the concave part of the turntable cover 523, so that when the second ends of the two discharge blocks 531 clamp the consumable, the blade 522 can cut the consumable.
  • the discharge port assembly 540 includes a second bracket 541 , a micro switch PCB board 542 , a circular transition block 543 , a discharge port quick connector 544 , a discharge position sensor and other components.
  • the micro switch PCB board 542 is arranged on the side of the second support 541 close to the discharge assembly 530 , and the second support 541 is provided with a circular transition block 543 to connect with the quick connector 544 of the discharge port.
  • the discharge position sensor may be a micro switch of the discharge port or other types of sensing devices.
  • the second bracket 541 can be fixedly connected with the first bracket 550 to fixedly connect the cutter assembly 520 , the discharge assembly 530 and the outlet assembly 540 .
  • the outlet assembly 540 is used to obtain the opening and closing signals of the front and rear micro switches of the front end of the consumables passing through the circular transition block 543 after entering the refueling/returning program; when the front end of the consumables does not pass the circular transition block 543, the discharge position sensor The corresponding shrapnel is lifted up by the circular transition block 543, and the discharge position sensor is closed; when the front end of the consumable passes through the circular transition block 543, the circular transition block 543 is pressed down by the shrapnel of the micro switch of the discharge port, and the discharge position sensor is turned on .
  • the discharge block 531 clamps the end of the consumables, and the cutter assembly 520 starts to work , the steering gear 510 drives the blade 521 to rotate from 0° to 50°. At this time, the cutting edge of the blade 521 will pass through the outlet of the common end of the transition piece 700 to cut off the consumables (Fig.
  • the transition piece 700 is a five-rotation-one transition piece, as shown in FIG. 10 , which includes a base frame 710 and a channel cover plate 720 , which are used to convert five feeding channels of consumables into one output channel.
  • the transition piece 700 is provided with 5 vertical openings for giving way to the pulley 452. When the cam 411 is pressed down, the pulley 452 descends synchronously to clamp the consumables.
  • the printing control method provided by the embodiment of the present invention can be applied to the aforementioned multi-consumable automatic switching extrusion device.
  • the multi-consumable automatic switching extrusion device is used to cooperate with a 3D printer including a print head.
  • the switching extrusion device is provided with a consumable extrusion module, which is used to drive the consumables in the feed channel into the discharge channel or retreat, and the multi-consumable automatic switching extrusion device also includes a plurality of feed channels and A discharge channel, and a cutting module on the discharge channel.
  • the print control method may at least include S301-S303.
  • a consumable material replacement signal is obtained, identify a target feeding channel corresponding to the consumable material replacement signal.
  • the printing action performed by the 3D printer of the 3D printing device is usually to slice the 3D model to be printed by the slicing software and generate a print file that can be recognized by the 3D printer. After the 3D printer reads the above print file, the print can be executed Work.
  • the 3D printer executes the printing model, according to the parameters in the printing file, the feeding channel corresponding to the required consumables can be selected among multiple feeding channels to connect to the discharging channel to perform the printing action. Furthermore, during the printing process of the 3D printing device, it may encounter the situation of switching materials.
  • the multi-consumable automatic switching extrusion device is equipped with multiple feeding channels and one discharging channel, and the target feeding channel corresponding to the consumable replacement signal can be any of the multiple feeding channels that need to be switched. a feed channel.
  • the consumable replacement signal is an instruction signal generated automatically by the 3D device or triggered by the user to instruct the 3D printing device to switch the consumables. If the 3D printing device obtains the consumable replacement signal, it can enter the consumable replacement process.
  • the triggering timing and triggering object of the consumable replacement signal are different, and the corresponding switching target feeding channel may be different. Specifically, it can be set in advance in the printing file or in the printing process of the 3D device. The embodiment of the present invention does not do this limited.
  • the consumables corresponding to the current feeding channel will be controlled to return to the set position first.
  • the specific position of the set position is not limited, as long as it does not affect the feeding of consumables in the target feeding channel.
  • the ends of the consumables in the current feeding channel are retracted to a certain position in the current feeding channel.
  • the consumable material cutting module can also cut off the end of the consumable material.
  • the end of the consumable if the end of the consumable is melted in the print head and then returned, the end of the consumable will form a pimple, which will affect the next use, that is, if the returned consumable becomes the consumable corresponding to the target feeding channel, the When the filament is advanced to the print head, the pimple at the end of the filament will prevent the filament from entering the print head, which may cause the situation that printing cannot continue. Therefore, in this embodiment, the ends of the returned consumables are cut off, so that lumps appear at the ends of the used consumables, and subsequent printing is not affected.
  • the consumable When the consumable is cut, the consumable can stop returning, and after the end of the consumable is cut, the consumable can continue to be returned.
  • the aforementioned consumables cutting module 500 can be used. It can be understood that in the method of the present application, other structures can also be used to cut the consumables, as long as the consumables can be cut.
  • the consumable after the consumable is cut, the consumable can be discharged out of the discharge channel, for example, to a waste box.
  • the end of the consumables corresponding to the target feeding channel can be moved to the print head of the 3D printer, and the 3D printing head can use the consumables in the target feeding channel for printing.
  • a control chip can be installed in the multi-consumable automatic switching extrusion device to implement the printing control method of the present application, or a control chip can be installed in the 3D printer of the 3D printing device to implement the printing control method of the application.
  • the consumable replacement signal if the consumable replacement signal is obtained, identify the target feeding channel corresponding to the consumable replacement signal; control the consumable corresponding to the current feeding channel to return to the set position, and In the process of consumables returning to the set position, control the consumables cutting module to cut the end of the consumables corresponding to the current feeding channel; through the consumables extrusion module, control the end of the consumables corresponding to the target feeding channel to move to the print head of the 3D printer,
  • the 3D printer can realize the automatic switching of multiple consumables without manual operation, and realize the cutting off of the irregular part of the front end of the consumables when the consumables are returned, so as to ensure that the consumables will not be blocked or jammed when the consumables are used again
  • the replacement of consumables is realized, and the way of replacing consumables is simple, which is convenient for multi-color printing of 3D printers.
  • identifying the target feeding channel corresponding to the consumables replacement signal may include: if the pre-set consumables replacement signal is read in the print file, identifying the target corresponding to the consumables replacement signal feed channel.
  • 3D printers print according to G-code
  • the 3D printing device needs to print the 3D model according to the G-code file. Therefore, in this embodiment, the 3D printing device can execute the printing process according to the G-code file.
  • the command code related to the consumable replacement signal is read in the G-code file
  • the target feeding channel corresponding to the consumable replacement signal can be identified.
  • the method provided in this embodiment can automatically identify the consumable replacement signal in the printing file during the printing process of the 3D printing device, so as to further automatically identify the target feeding materials of the corresponding multiple feeding channels in the 3D printing device according to the consumable replacement signal. aisle.
  • the printing control method before controlling the consumables corresponding to the current feeding channel to return to the set position, the printing control method further includes: sending a stop signal to the 3D printer, so that the print head of the 3D printer moves to the set position, and the The above-mentioned print head suspends the printing action.
  • a stop signal can be sent to the 3D printer. If the 3D printer receives the stop signal, the 3D printer will control the print head to move to the set position.
  • the setting position in this embodiment can be a safe position of the print head in the unprinted state, and this safe position can avoid contact with the printed 3D model. The bed and extrusion heating state is maintained. In addition, the print head moves to the setting position, so that the print head will not damage the model when it is heated, and the printing accuracy is increased.
  • step S302 controls the consumables corresponding to the current feeding channel to return to the set position, and cuts the end of the consumables corresponding to the current feeding channel during the process of returning the consumables corresponding to the current feeding channel to the set position.
  • the section may include the following A1 ⁇ A3.
  • A1 Control the consumable corresponding to the current feeding channel to return to the first set position through the consumable extrusion module;
  • the consumable extrusion module can control the advance and retraction of consumables.
  • the specific position of the first set position is not limited.
  • the first set position can be located between the feed channel and the discharge channel, or on the discharge channel. After the consumables fall back to the first set position, the consumables can stop moving.
  • A2 controlling the consumable material cutting module to cut the end of the consumable material corresponding to the current feeding channel
  • the blade 502 of the consumable material cutting module can be rotated to cut the consumable material, so that the knots at the end of the consumable material can be cut off, which is convenient for the subsequent use of the consumable material.
  • the consumable material cutting module is controlled to cut the end of the consumable material corresponding to the current feeding channel, and the consumable material is controlled to stop moving, so as to facilitate the cutting of the consumable material.
  • A3 Control the consumable corresponding to the current feeding channel to return to the second set position through the consumable extrusion module.
  • the second set position can be located in the feed channel, and each feed channel can be provided with a second set position.
  • the second setting position can be located in the feeding channel, so that the consumables in the current feeding channel will not affect the use of the target feeding channel.
  • the consumables corresponding to the current feeding channel are controlled by the consumables extrusion module to return to the first set position; the consumables cutting module is controlled to cut the end of the consumables corresponding to the current feeding channel; The consumables corresponding to the current feeding channel fall back to the second set position, and the consumables can be cut off, so that the consumables may be cut off at the end, which is convenient for the subsequent use of the consumables.
  • the consumables in the current feeding channel will not Affects the use of target feed channels.
  • the discharge channel is correspondingly provided with a discharge position sensor
  • each of the feed channels is correspondingly provided with a feed position sensor
  • the above-mentioned A1 controls the consumable corresponding to the current feed channel to return to the first through the consumable extrusion module.
  • Setting the position includes: controlling the retraction of the consumables corresponding to the current feeding channel through the consumables extrusion module, and controlling the current advance through the consumables extrusion module if the material cut-off signal corresponding to the discharge position sensor is obtained.
  • the consumables corresponding to the material channel are retracted by a first preset distance.
  • the end of the consumable is located at the first set position.
  • the retraction of consumables can be controlled by the consumable extrusion module.
  • Material out signal indicates that there is no consumable at the corresponding position of the discharge sensor. If the material breaking signal corresponding to the discharge position sensor is obtained, it indicates that the end of the retracted consumables has passed the position corresponding to the discharge position sensor. Based on this position, the consumables corresponding to the current feeding channel are controlled to return to the first position.
  • a preset distance instead of simply controlling the retraction length of the filament through the filament extrusion module, can increase the accuracy of the retraction position of the filament.
  • the corresponding position of the discharge position sensor corresponds to the discharge channel, that is, the discharge position sensor corresponds to The position is closer to the first setting position, which further increases the accuracy of the retracting position of the consumables, which is convenient for the subsequent cutting of consumables.
  • the position of the discharge position sensor is different from the position of the consumables cutting module, and the discharge position sensor will not hinder Cutting of consumables.
  • the above-mentioned A3 controls the consumables corresponding to the current feeding channel to return to the second set position through the consumables extrusion module, which may include: controlling the consumables corresponding to the current feeding channel to return to the second set position through the consumables extrusion module.
  • controlling the consumables corresponding to the current feeding channel to return to the second set position through the consumables extrusion module back, if the material cut-off signal corresponding to the feeding position sensor is obtained, stop the movement of the consumable corresponding to the current feeding channel through the consumable extruding module.
  • the material cut-out signal corresponding to the feed position sensor is obtained, it indicates that the end of the retracted consumable has passed the position corresponding to the feed position sensor, that is, the consumable has returned to the second set position.
  • the position determination of the consumable is simple and practical, and the efficiency of replacing the consumable is improved.
  • the discharge channel is correspondingly provided with a discharge position sensor, and the above S303 controls the end of the consumable corresponding to the target feed channel to move to the print head of the 3D printer, which may further include the following B1-B2.
  • B1 controlling the consumable extrusion module to switch to the position corresponding to the target channel, and making the consumable corresponding to the target feed channel enter the discharge channel;
  • the filament extrusion module Control the filament extrusion module to switch to the position corresponding to the target channel, even if the cam of the filament extrusion module presses down the pressing pulley corresponding to the target channel, so that the filament extrusion module can control the advancement of the consumables in the target feeding channel.
  • the consumables in the target feed channel can be controlled to advance
  • the consumables can be controlled to advance to the discharge channel.
  • the consumables in the target feed channel advance to the position of the discharge channel corresponding to the discharge sensor, and the signal of having material can be obtained.
  • the second preset distance is the distance between the position corresponding to the discharge position sensor and the position of the nozzle of the print head, and the distance can be measured in advance.
  • the position of the end of the consumable is judged by the discharge position sensor, and then the consumable is controlled to advance the second preset distance.
  • the determination of the initial position of the end of the consumable can be neglected, and the initial position of the consumable has no effect on the advance of the consumable.
  • only the position of the discharge position sensor is used as a reference to control the advance of the consumables, which reduces the calculation amount of the advance of the consumables, makes the replacement of the consumables easier, and reduces the difficulty of replacing the consumables.
  • the printing control method may also include: controlling the consumables corresponding to the current feeding channel to retreat; A material cut-off signal, record the retraction distance of the consumables, and use the distance as the second preset distance.
  • the ends of the consumables are still located in the print head, and the control controls the retraction of the consumables corresponding to the current feeding channel. If the material cut-off signal corresponding to the discharge position sensor is obtained, it means that the end of the consumable has retracted to the position corresponding to the discharge position sensor, and the retraction distance of the consumable is recorded, that is, the distance between the end of the print head and the discharge position is The distance between the corresponding positions of the position sensor does not need to be manually measured by the user.
  • the second preset distance is calculated through the retracted length of the consumable, and the second preset distance obtained is more accurate, which reduces the consumables measured by the user due to the bending of the consumables the accuracy error.
  • the printing control method may further include: sending a stop signal to the 3D printer, so that the 3D printer The print head is moved to the set position, and the print head is paused to execute the printing action. That is to say, before controlling the retraction of consumables corresponding to the current feeding channel, first send a stop signal to the 3D printer, and control the print head of the 3D printer to move to a safe position, so as to avoid consumables retreating while the print head is still working Condition.
  • the printing control method may further include: sending a start signal to the 3D printer, so that the 3D printer starts the wiping process, and cleans the consumable replacement process The consumables leaked from the nozzle of the print head; or, make the 3D printer print the consumables in the nozzle of the print head of the 3D printer at a preset position or extrude them into the waste area.
  • the above-mentioned waste materials of the printing head can also be cleaned to ensure that the consumables will not be blocked or jammed when passing through the extruder.
  • the multi-consumable automatic switching extrusion device is respectively provided with an indicator light for indicating the use status of the feeding channel corresponding to each of the feeding channels.
  • the printing control method may further include: controlling the indicator light corresponding to the target feeding channel to work according to the set mode. It can be seen from FIG. 1 that, among the five feed channels in this embodiment, an LED indicator light can be provided correspondingly under each feed channel. For example, assuming that the amount of consumables in the feeding channel 1 is less than the set amount, the corresponding light of the feeding channel 1 can be controlled to keep flashing to remind the relevant staff to replace the consumables in the feeding channel 1 in time.
  • the consumable replacement signal may also be a material shortage signal generated when the feed position sensor in the current feed channel detects that there is a shortage of consumables in the current feed channel.
  • the feeding position sensor can be a micro switch of the feeding port, if the micro switch of the feeding port is not triggered by the consumables in the feeding channel, the material shortage signal is used as the consumables replacement signal.
  • each feeding channel can be provided with a feeding position sensor. After the end of the consumable in the current feeding channel passes the feeding position sensor in the current feeding channel, the feeding position sensor is triggered to generate a material shortage.
  • the method provided in this embodiment can be applied to when the 3D printer performs automatic switching and continuous printing of multiple rolls of consumables corresponding to multiple feeding channels, and can switch and print among 5 rolls of consumables as needed according to the slice data, and realize the printing of 5 rolls of consumables. Automatically switch printing function.
  • the current feed channel is skipped, and a prompt message is sent or the current feed channel
  • the next channel serves as the new target feed channel.
  • the consumable replacement signal is triggered when the amount of consumables in the current feeding channel is less than the set amount.
  • the new target feeding channel When the current feed channel corresponding to the consumable replacement signal has been triggered before, the current feed channel can be skipped and a prompt message indicating material shortage can be issued, or the next channel of the current feed channel can be automatically used as the new target feed aisle. Avoid affecting the printing process of 3D models due to lack of consumables.
  • the dotted line L1 is the corresponding position of the discharge position sensor
  • the position between the dotted line L2 and the dotted line L3 is the corresponding position of the discharge block channel
  • the dotted line L3 is the corresponding position of the blade in the consumable cutting module
  • the dotted line L4 is the corresponding position of the waiting point for consumables.
  • the dotted line L5 is the corresponding position of the extrusion wheel 430
  • the dotted line L6 is the corresponding position of the feed position sensor.
  • Figure 2 shows the distances between the dotted lines in millimeters.
  • the 3D printer is currently printing channel 1 consumables. If the 3D printer reads the consumable replacement signal corresponding to the pre-set G code in the print file, identify the target feeding channel corresponding to the consumable replacement signal as the channel 3 consumable signal;
  • A2 control the print head of the 3D printer to move to the set position, so that the print head does not touch the print model, and control the print head to suspend the printing action. At this time, the heating state of the 3D printer's heating bed and extrusion remains;
  • A3 control the retraction of the consumable corresponding to channel 1. If the material cut-off signal corresponding to the discharge position sensor is obtained, record the retraction distance of the consumable; specifically, the extrusion motor quickly retracts and starts recording the retraction distance. If After the end of the consumables has passed the discharge position sensor of the consumables cutting module, the discharge position sensor is turned on, and the distance A from the nozzle of the print head to the micro switch of the discharge port is recorded at this time;
  • the extrusion motor continues to retreat 10mm, and the consumable cutting module starts to work to cut the irregular part of the end of the consumable (about 16mm in length) and drop the cut consumable discharge channel into the waste box;
  • the consumable extrusion module is switched to channel 3 position (the camshaft motor drives the camshaft assembly to rotate to 180° position, and the channel 3 cam presses down the pressing rod); at this time, the extrusion motor starts to work to extrude the channel 3 consumables, forward Extrude until the front end of the consumables pushes up the discharge position sensor of the consumables cutting module, the discharge position sensor is closed, and the extrusion distance M1 starts to be calculated.
  • A7 send a start signal to the 3D printer, so that the 3D printer starts the wiping process, cleans the consumables remaining in the nozzle during the replacement of the consumables and prints them on the preset position such as the wiping tower, or makes the 3D printer print the 3D printer
  • the consumables in the head nozzle are directly extruded in the waste area of the printer; the extrusion length of the wiping program is about 20mm.
  • the 3D printer is currently printing the consumables corresponding to channel 1, and the consumable replacement signal generated when it detects that the consumables in channel 1 is less than the set amount, determines that the target feeding channel corresponding to the consumable replacement signal is channel 2; where, when After the tail end of the consumables in channel 1 passes the feed position sensor of channel 1, the material shortage signal generated when the feed position sensor is turned on is used as a consumable replacement signal;
  • the extrusion motor continues to retreat 10mm, and the consumable cutting module starts to work to cut the irregular part of the front end of the consumable (about 16mm in length) and drop the cut consumable discharge channel into the waste box;
  • the consumables extrusion module is switched to the position of channel 2 in the order of channels 1-5 (the camshaft motor drives the camshaft assembly to rotate to the 120° position, and the cam of channel 2 presses down the pressing rod); at this time, the extrusion motor starts to extrude Out of channel 2 consumables, extrude forward until the front end of the consumables pushes up the discharge position sensor of the consumable cutting module, the discharge position sensor is closed, and starts to calculate the extrusion distance M2.
  • An embodiment of the present invention also provides a computer-readable storage medium, where the computer-readable storage medium is used to store program codes, and the program codes are used to execute the print control method described in the above-mentioned embodiments.
  • the embodiment of the present invention also provides a multi-consumable automatic switching extrusion device, the multi-consumable automatic switching extrusion device includes a processor and a memory: the memory is used to store program codes, and transmit the program codes to the The processor; the processor is configured to execute the printing control method described in the above embodiment according to the instructions in the program code.
  • An embodiment of the present invention also provides a 3D printing device, which is provided with the multi-consumable automatic switching extrusion device of the above-mentioned embodiment.
  • the 3D printing device may also include the multi-consumable automatic switching extrusion device and the printing head described above. , nozzles and other components.
  • the functional units in each embodiment of the present invention may be physically independent of each other, or two or more functional units may be integrated together, or all the functional units may be integrated into one processing unit.
  • the above-mentioned integrated functional units can be implemented not only in the form of hardware, but also in the form of software or firmware. Those skilled in the art can understand that: if the integrated functional unit is implemented in the form of software and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the essence of the technical solution of the present invention or all or part of the technical solution can be embodied in the form of software products, the computer software products are stored in a storage medium, which includes a number of instructions to make a A computing device (such as a personal computer, a server, or a network device, etc.) executes all or part of the steps of the methods described in the various embodiments of the present invention when executing the instructions.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and various media capable of storing program codes.
  • all or part of the steps for realizing the aforementioned method embodiments may be implemented by program instruction-related hardware (such as a personal computer, server, or computing device such as a network device), and the program instructions may be stored in a computer-readable memory
  • program instruction-related hardware such as a personal computer, server, or computing device such as a network device
  • the program instructions may be stored in a computer-readable memory
  • the computing device executes all or part of the steps of the methods described in the various embodiments of the present invention.

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Abstract

本发明提供了一种打印控制方法、存储介质及3D打印设备，应用于多耗材自动切换挤出装置，打印控制方法包括：若获取到耗材更换信号，识别所述耗材更换信号对应的目标进料通道；控制当前进料通道对应的耗材回退至设定位置，并在当前进料通道对应的耗材回退至设定位置过程中，裁断所述当前进料通道对应的耗材的端部；控制所述目标进料通道对应的耗材的端部移动到3D打印机的打印头，以使所述3D打印机继续执行打印动作。本发明的方案无需人工操作即可实现多耗材的自动切换，保证耗材再次使用时，耗材不出现堵料、卡料情况。

Description

一种打印控制方法、存储介质及多耗材自动切换挤出装置 技术领域
本发明涉及3D打印技术领域，特别是一种打印控制方法、存储介质及多耗材自动切换挤出装置。
背景技术
传统3D打印机，如熔融沉积式3D打印机，普遍使用多个挤出机加单喷头或双喷头来实现多颜色耗材、不同材质耗材的打印。当耗材颜色或耗材材质较多时，使用的挤出机数量也较多，严重增加了生产成本。并且，由于挤出机数量较多，在进行不同颜色耗材以及不同材质耗材的切换过程也显得较为繁琐，且使用不便。
发明内容
鉴于上述问题，提出了本发明以便提供一种克服上述问题或者至少部分地解决上述问题的一种打印控制方法、存储介质及多耗材自动切换挤出装置。
根据本发明的第一方面，提供了一种打印控制方法，应用于多耗材自动切换挤出装置，所述多耗材自动切换挤出装置设有耗材挤出模块，用于驱使所述进料通道中的耗材进入所述出料通道或进行回退，所述多耗材自动切换挤出装置还包括多个进料通道和一个出料通道，以及所述出料通道上的裁剪模块，所述方法包括：
若获取到耗材更换信号，识别所述耗材更换信号对应的目标进料通道；
控制当前进料通道对应的耗材回退至设定位置，并在当前进料通道对应的耗材回退至设定位置过程中，裁断所述当前进料通道对应的耗材的端部；
控制所述目标进料通道对应的耗材的端部移动到3D打印机的打印头，以使所述3D打印机继续执行打印动作。
可选地，所述获取到耗材更换信号，识别所述耗材更换信号对应的目标进料通道，包括：
若读取到打印文件中具有预先设置的耗材更换信号，识别所述耗材更换信号对应的目标进料通道。
可选地，所述多耗材自动切换挤出装置设有耗材挤出模块，用于驱使所述进料通道中的耗材进入所述出料通道或进行回退，所述多耗材自动切换挤出装置还包括多个进料通道和一个出料通道，以及所述出料通道上的裁剪模块，所述控制当前进料通道对应的耗材回退至设定位置，并在当前进料通道对应的耗材回退至设定位置过程中，裁断所述当前进料通道对应的耗材的端部，包括：
通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第一设定位置，
控制所述耗材裁剪模块裁断所述当前进料通道对应的耗材的端部；
通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第二设定位置。
可选地，所述出料通道对应设置有出料位置传感器，每个所述进料通道对应设置有进料位置传感器；
所述通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第一设定位置，包括：
通过所述耗材挤出模块控制当前进料通道对应的耗材回退，若获取到所述出料位置传 感器对应的断料信号，再通过所述耗材挤出模块控制当前进料通道对应的耗材回退第一预设距离；
所述通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第二设定位置，包括：
通过所述耗材挤出模块控制当前进料通道对应的耗材回退，若获取到所述进料位置传感器对应的断料信号，通过所述耗材挤出模块停止当前进料通道对应的耗材的移动。
可选地，所述多耗材自动切换挤出装置设有耗材挤出模块，用于驱使所述进料通道中的耗材进入所述出料通道或进行回退，所述多耗材自动切换挤出装置还包括多个进料通道和一个出料通道，以及所述出料通道上的裁剪模块，所述出料通道对应设置有出料位置传感器，所述控制所述目标进料通道对应的耗材的端部移动到3D打印机的打印头，包括：
控制所述耗材挤出模块切换到目标通道对应的位置，并使所述目标进料通道对应的耗材进入所述出料通道内；
若获取到所述出料位置传感器对应的有料信号，控制所述目标通道对应的耗材前进第二预设距离。
可选地，所述控制当前进料通道对应的耗材回退至第一设定位置之前，所述方法还包括：
控制当前进料通道对应的耗材回退；
若获取到所述出料位置传感器对应的断料信号，记录所述耗材的回退距离，并将所述距离作为所述第二预设距离。
可选地，所述多耗材自动切换挤出装置应用于3D打印机，所述控制当前进料通道对应的耗材回退至设定位置之前，所述方法还包括：
发送停止信号给3D打印机，以使所述3D打印机的打印头移动至设置位置，并使所述打印头暂停执行打印动作；
所述控制所述目标通道对应的耗材前进第二预设距离之后，所述方法还包括：
发送启动信号给3D打印机，以使所述3D打印机启动擦料进程，并清理耗材更换过程中打印头喷嘴漏出的耗材；或，使所述3D打印机将所述3D打印机的打印头喷嘴内的耗材打印在预设位置或挤出至废料区内。
可选地，所述多耗材自动切换挤出装置上对应各所述进料通道分别设置有用于表征进料通道使用状态的指示灯；所述识别所述耗材更换信号对应的目标进料通道之后，还包括：
控制所述目标进料通道对应的指示灯按照设定方式进行工作。
根据本发明的第二方面，提供了一种计算机可读存储介质，所述计算机可读存储介质用于存储程序代码，所述程序代码用于执行第一方面中任一项所述的打印控制方法。
根据本发明的第三方面，提供了一种多耗材自动切换挤出装置，所述多耗材自动切换挤出装置包括处理器以及存储器：
所述存储器用于存储程序代码，并将所述程序代码传输给所述处理器；
所述处理器用于根据所述程序代码中的指令执行第一方面中任一项所述的打印控制方法。
本发明提供了一种打印控制方法、存储介质及多耗材自动切换挤出装置，本发明提供打印控制方法，可以应用于多耗材自动切换挤出装置，在3D打印设备执行打印过程中，如 果获取到耗材更换信号可以自动识别处对应的目标进料通道，蓉儿实现打印耗材的更换，无需人工操作即可实现多耗材的自动切换，并且通过把耗材由多个进料通道过渡成一个公共的出料通道，使耗材输送时保证流畅性，减少挤出电机的负载负担。进一步地，本发明的打印方法无需人工操作即可实现多耗材的自动切换，并实现耗材回退时把耗材前端不规则的部分切断，保证耗材再次使用时，耗材不出现堵料、卡料情况，实现了耗材的更换，更换耗材方式简单，便于实现3D打印机的多色打印。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其它目的、特征和优点能够更明显易懂，以下特举本发明的具体实施方式。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1示出了根据本发明实施例的3D打印设备中多耗材自动切换挤出装置结构示意图；
图2示出了根据本发明实施例的多耗材自动切换挤出装置和打印头连接示意图；
图3示出了根据本发明实施例的打印控制方法流程示意图；
图4示出了根据本发明实施例的3D打印设备中多耗材自动切换挤出装置爆炸示意图；
图5A示出了根据本发明实施例的多耗材自动切换挤出装置中耗材挤出模块模块示意图；
图5B示出了根据本发明实施例的多耗材自动切换挤出装置中耗材挤出模块的部分结构示意图；
图6示出了图5A所示耗材挤出模块中凸轮轴组件结构示意图；
图7示出了图5A所示耗材挤出模块中凸轮轴组件原理示意图；
图8示出了图5A所示耗材挤出模块中压料杆组件示意图；
图9示出了本发明实施例的多耗材自动切换挤出装置中耗材裁剪模块结构示意图；
图10示出了本发明实施例的多耗材自动切换挤出装置中过渡件示意图；
100-进料通道，200-出料通道，300-打印头，400-耗材挤出模块，410-凸轮轴组件，411-凸轮，412-第一凸轮轴挡块，413-第二凸轮轴挡块，414-螺栓，420-凸轮轴电机，430-挤出轮，440-挤出电机，450-压料杆组件，451-压料杆，452-压料滑轮，453-复位弹簧，454-复位弹簧限位块，455-压料杆滑块，456-压料杆轴，457-卸压弹簧，460-微动开关PCB板，500-耗材裁剪模块，510舵机、520-切刀组件，521-刀片转盘，522-刀片，523-转盘压盖，530-排料组件，531-排料块，533-带勾拉簧，540-出料口组件，541-第二支架，542-微动开关PCB板，543-圆形过渡块，544-出料口快接头，550-第一支架，600-外壳，610-外壳盖板，620-外壳侧板，700-过渡件，710-底板骨架、720-通道盖板，800-废料盒，900-指示灯。
具体实施方式
下面将参照附图更详细地描述本发明的示例性实施例。虽然附图中显示了本发明的示例性实施例，然而应当理解，可以以各种形式实现本发明而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本发明，并且能够将本发明的范围完整的传达给本领域的技术人员。
本发明实施例提供了一种打印控制方法，可应用于具有多耗材自动切换挤出装置的3D打印设备，其中，3D打印设备包括多耗材自动切换挤出装置和3D打印机，多耗材自动切换挤出装置可用于实现不同颜色、不同材质耗材的自动切换。
图1示出了根据本发明实施例的3D打印设备中多耗材自动切换挤出装置的整体结构示意图，参见图1可知，本实施例记载的多耗材自动切换挤出装置设有多个进料通道100和一个出料通道200，其中，进料通道可用于收容不同颜色、不同材质的耗材，各个进料通道100均能够和出料通道200连接。
图2示出了根据本发明实施例的多耗材自动切换挤出装置和3D打印机的打印头连接示意图，如图2所示，出料通道200一端可与任一进料通道100连接，另一端与3D打印设备的打印头300连接。图1、图2示意性示出了5个进料通道，实际应用中，进料通道的数量可以根据不同的需求进行设置，本发明实施例对此不做限定。
图4示出了根据本发明实施例的3D打印设备中多耗材自动切换挤出装置爆炸示意图，图5A～图10分别示出了多耗材自动切换挤出装置各组成模块示意图。结合图4～图10可知，本实施例提供的多耗材自动切换挤出装置至少可以包括外壳600、耗材挤出模块400、耗材裁剪模块500和过渡件700。其中，外壳600包括外壳盖板610以及两个外壳侧板620。
本实施例中的耗材挤出模块，用于驱使进料通道中的耗材进入出料通道或进行回退。
参见图4、图5A和图5B，耗材挤出模块400可以包括凸轮轴组件410、凸轮轴电机420、挤出轮430、挤出电机440，压料杆组件450和微动开关PCB板460等。
凸轮轴组件410安装在凸轮轴电机420上，凸轮轴组件410能被凸轮轴电机420驱动而转动；挤出轮430与挤出电机440连接，挤出轮430能被挤出电机440驱动而转动；压料杆组件450位于凸轮轴组件410与挤出轮430之间，耗材可以穿过压料杆组件450与挤出轮430之间，耗材挤出模块400通过凸轮轴电机420带动凸轮轴组件410选择性地压下压料杆组件450中的任一压料杆，使多个进料通道100中被下压的压料杆对应的进料通道中的耗材与挤出轮430夹紧耗材，以挤出对应通道的耗材。其中，过渡件700位于压料杆组件450和挤出轮430之间。
微动开关PCB板460包括多个进料位置传感器，进料位置传感器的数量与凸轮轴组件410的凸轮的数量对应，用于检测凸轮对应的进料通道中是否有耗材，若一个进料通道中有耗材，则该进料通道对应的进料位置传感器发出有料信号，若一个进料通道中没有耗材，则该进料通道对应的进料位置传感器发出断料信号。
如图6～7所示，凸轮轴组件410包括多个交错设置的凸轮411，本实施例中为五个，多个凸轮411依次紧邻设置，多个凸轮411两侧还分别设置有第一凸轮轴挡块412和第二凸轮轴挡块413。第二凸轮轴挡块413上有一凸起，用于在凸轮轴电机420归零时，通过 步进电机堵转阻断方式让凸轮轴电机420归零；利用螺栓414把第一凸轮轴挡块412、多个凸轮411、第二凸轮轴挡块413依次连接起来。
如图8所示，压料杆组件450包括对应每个凸轮设置的多个压料杆451、压料滑轮452、复位弹簧453、复位弹簧限位块454、压料杆滑块455、压料杆轴456、卸压弹簧457。其中，压料杆451的数量与进料通道数量对应，多个压料杆451并列设置，压料杆451一端设置有可供压料轴456穿过的通孔，以通过压料轴456连接多个压料杆451，各压料杆451底部设置有对应的压料滑轮452，以配合凸轮轴组件410压紧耗材。各压料杆451的底部安装有复位弹簧453，复位弹簧限位块454对应各复位弹簧453设置，且对应各复位弹簧453设置有限位槽，当压料杆451受到凸轮411的作用力时，对应设置的复位弹簧453被压缩至复位弹簧限位块454对应的限位槽。压料轴456两端均设置有压料杆滑块455，压料杆滑块455上设置有卸压弹簧457，卸压弹簧457位于压料杆滑块455远离挤出轮430的一侧。压料杆451承受压力过大时，压料杆滑块455向压力的反方向压缩卸压弹簧457。
其中，五个凸轮411可以相邻组装错开60°，使凸轮轴电机420带动凸轮轴组件410旋转时每次仅下压其中一个压料杆。当凸轮轴组件410在0°时，挤出轮430可以处于空挡状态，即通道1-5的压料杆均没有压下，耗材均处于松开状态；在60°时，凸轮轴组件410压下压料杆1，通道1耗材处于压紧状态，通道2-5处于松开状态；在120°时，凸轮轴组件410压下压料杆2，通道2耗材处于压紧状态，通道1、3-5处于松开状态；依次类推。
另外，本实施例中，通过压料滑轮424与凸轮轴组件410配合完成压紧耗材的作用，当凸轮411的凸点逐渐转到压料杆451位置时，复位弹簧453逐渐被压缩，压料滑轮452压紧耗材；当凸轮411的凸点逐渐转离压料杆451位置时，复位弹簧453开始复位，压料滑轮452松开耗材，并把压料杆451恢复初始位置。当向下压力过大时，压料杆滑块455向上压缩卸压弹簧457，使压料滑轮452与挤出轮430间压紧耗材的力度在一定范围以免损伤耗材。
在本发明实施例中，如图4所示，多耗材自动切换挤出装置包括设置在出料通道上的耗材剪裁模块500。耗材剪裁模块500主要用于在耗材回退时切断耗材前端不规则的部分，把耗材切断的部分排出通道，并且通过在出料通道对应设置的出料位置传感器记录回退的信号。
参见图9，耗材剪裁模块500可以包括舵机510、切刀组件520、排料组件530、出料口组件540及第一支架550。其中，切刀组件520和排料组件530设置于舵机510和出料口组件540之间，并通过第一支架550与舵机510固定连接，以共同形成出料通道。切刀组件520、排料组件530都与舵机510连接，
在耗材回退到合适位置时，舵机510驱动排料组件530夹紧耗材，舵机510还驱动切刀组件将耗材切断，舵机510并驱动拍料组件松开被切断的一截耗材，以将被切断的耗材排出去。
其中，切刀组件520包括刀片转盘521，刀片522，转盘压盖523，转盘连接螺栓(图未示)等，刀片转盘521上设置有用于刀片限位的卡槽，刀片522安装在刀片转盘521上的卡槽，再安装上转盘压盖523把刀片522压紧，利用转盘连接螺栓可固定转盘521和转 盘压盖523。转盘压盖523的表面包括圆弧部和凹陷部，转盘压盖523用于和排料组件530接触。
排料组件530包括排料块531、轴承(图未示)，带勾拉簧533，轴承连接螺栓(图未示)。图9所示耗材剪裁模块500设有两个排料块531，两个所述排料块531对称设置，且形成收容切刀组件520的收容空间。排料块531的第一端设有收容轴承的凹槽，轴承设置于排料块531上的凹槽中。带勾拉簧533也位于排料块531的第一端，带勾拉簧533两端设有可供轴承连接螺栓穿过的通孔，两个轴承连接螺栓依次穿过带勾拉簧533和轴承，从而固定连接带勾拉簧533和排料块531。排料块531的第二端和第一端相对，排料块531的第二端用于夹持耗材。排料块531的第一端与转盘压盖523接触，转盘压盖523随着舵机的驱动转动。在排料块531的第一端与转盘压盖523的圆弧部接触时，排料块531的第二端距离不变，可以夹紧耗材；在排料块531的第二端与转盘压盖523的凹陷部接触时，两个排料块531的第一端在带勾拉簧533的拉力下距离变短，两个排料块531的第二端之间的距离变远，从而可以松开耗材或者排出被夹紧的耗材。
其中，刀片522的位置与转盘压盖523的凹陷部对应，以使两个排料块531的第二端夹紧耗材时，刀片522可以切断耗材。
出料口组件540包括第二支架541，微动开关PCB板542，圆形过渡块543，出料口快接头544、出料位置传感器等组件。微动开关PCB板542设置于第二支架541靠近排料组件530的一侧，第二支架541上设置有圆形过渡块543，以与出料口快接头544连接。其中，出料位置传感器可以是出料口微动开关或是其他类型的传感设备。第二支架541可与第一支架550固定连接，以固定连接切刀组件520、排料组件530和出料口组件540。出料口组件540用于得到当进入换料/退料程序后耗材前端经过圆形过渡块543前后微动开关的开闭信号；当耗材前端未经过圆形过渡块543时，出料位置传感器对应的弹片被圆形过渡块543顶起，出料位置传感器闭合；当耗材前端经过圆形过渡块543后，圆形过渡块543被出料口微动开关弹片压下，出料位置传感器开启。
当进入换料/退料程序后，耗材的前端回退到出料通道的预设位置时(耗材前端约12-18mm)，排料块531夹紧耗材的端部，切刀组件520开始工作，舵机510带动刀片521由0°旋转到50°位置，此时刀片521刃口会经过过渡件700的公共端出口把耗材切断(图2.10.2)；当切刀组件520由50°再转到110°时，转盘压盖523的凸轮轮廓有由大变小，带勾拉簧533把排料块531拉近，1/2通道口张开，排料块531松开耗材被裁断的端部，同时把切断的耗材排除通道，掉落在废料盒800内；接着舵机510回转到0°；此时，耗材剪裁模块500完成一次工作循环，等待下次换料/退料程序指令。
过渡件700为五转一过渡件，如图10所示，其包括底板骨架710和通道盖板720，用于实现5个耗材的进料通道转换成一个通道口输出。过渡件700上设置有5个竖向的开孔用于给滑轮452让位，供凸轮411下压时，滑轮452同步下降，夹紧耗材。
如图3所示，本发明实施例提供的打印控制方法，可以应用于前述的多耗材自动切换挤出装置，多耗材自动切换挤出装置用于与包括打印头的3D打印机配合，多耗材自动切换挤出装置设有耗材挤出模块，用于驱使所述进料通道中的耗材进入所述出料通道或进行回退，所述多耗材自动切换挤出装置还包括多个进料通道和一个出料通道，以及所述出料通 道上的裁剪模块。打印控制方法至少可以包括S301～S303。
S301，若获取到耗材更换信号，识别耗材更换信号对应的目标进料通道。在3D打印设备的3D打印机执行的打印动作，通常是在切片软件对待打印的三维模型进行切片处理并生成可由3D打印机可识别的打印文件，在3D打印机读取到上述打印文件之后即可执行打印工作。在3D打印机执行打印模型时，可根据打印文件中的参数在多个进料通道中选择所需耗材对应的进料通道连接出料通道以执行打印动作。进一步地，在3D打印设备执行打印过程中，可能会遇到切换材料的情况，因此，如果获取到耗材更换信号，即可进入耗材切换进程，同时需要识别耗材更换信号对应的目标进料通道，也即在后续打印中所需耗材所对应存储的进料通道。结合图1～图2可知，多耗材自动切换挤出装置设有多个进料通道和一个出料通道，耗材更换信号对应的目标进料通道可以为需要切换的多个进料通道中的任意一个进料通道。
其中，耗材更换信号是由3D设备自动触发或者是用户所触发生成的用于指示3D打印设备进行耗材切换的指令信号，如果3D打印设备获取到该耗材更换信号，即可进入耗材更换进程。耗材更换信号的触发时机、触发对象不同，所对应切换的目标进料通道可能不同，具体可以预先在打印文件中设置或者是预先在3D设备的打印进程中设置，本发明实施例对此不做限定。
S302，控制当前进料通道对应的耗材回退至设定位置，并在当前进料通道对应的耗材回退至设定位置过程中，裁断所述当前进料通道对应的耗材的端部。
在需要更换耗材时，由于原先正在使用的耗材还位于3D打印机的打印头中，如果直接控制需要更换的耗材前进，会和打印头中原先留存的耗材造成冲突，无法完成需要更换的耗材的进料。本申请中，会先控制当前进料通道对应的耗材回退至设定位置。
设定位置的具体位置不作限定，不影响目标进料通道的耗材的进料即可。如，当前进料通道的耗材的端部退回至当前进料通道的某一位置。
在回退过程中，耗材裁剪模块还可以将耗材的端部裁断。打印机工作过程中，如果耗材的端部在打印头中被融化时再退回，耗材的端部将形成疙瘩，影响下次的使用，即若退回的耗材后续成为目标进料通道对应的耗材，该耗材前进至打印头时，该耗材端部的疙瘩会影响该耗材进入打印头，可能造成无法继续打印的情况。因此，本实施例将被退回的耗材的端部裁断端，即可避免使用过的耗材的端部出现疙瘩的情况，不影响后续的打印。
耗材被裁断时，耗材可以停止退回，在耗材端部被裁断后，再使耗材继续退回。
耗材被裁断时，可以采用前述的耗材剪裁模块500。可以理解，本申请的方法中，也可以采用其他结构对耗材裁断，能裁断耗材即可。
其中，将耗材裁断后，即可将耗材排出至出料通道外，例如可以排出至废料盒。
S303，控制所述目标进料通道对应的耗材的端部移动到3D打印机的打印头，以使所述3D打印机继续执行打印动作。
在耗材退回到设定位置后，即可将目标进料通道对应的耗材的端部移动到3D打印机的打印头，3D打印头即可使用目标进料通道的耗材进行打印。
可以理解，多耗材自动切换挤出装置中可以设置控制芯片，以执行本申请的打印控制方法，也可以是3D打印设备的3D打印机中设置控制芯片，以执行本申请的打印控制方法。
本实施例提供的打印控制方法，若获取到耗材更换信号，识别耗材更换信号对应的目标进料通道；控制当前进料通道对应的耗材回退至设定位置，并在当前进料通道对应的耗材回退至设定位置过程中，控制耗材裁剪模块裁断当前进料通道对应的耗材的端部；通过耗材挤出模块控制目标进料通道对应的耗材的端部移动到3D打印机的打印头，以使3D打印机继续执行打印动作，无需人工操作即可实现多耗材的自动切换，并实现耗材回退时把耗材前端不规则的部分切断，保证耗材再次使用时，耗材不出现堵料、卡料情况，实现了耗材的更换，更换耗材方式简单，便于实现3D打印机的多色打印。
本实施例中，若获取到耗材更换信号，识别所述耗材更换信号对应的目标进料通道，可以包括：若读取到打印文件中具有预先设置的耗材更换信号，识别耗材更换信号对应的目标进料通道。
一般3D打印机是按照G-code来进行打印的，即3D打印设备需要依据G-code文件实现3D模型的打印，因此，本实施例中可以是在述3D打印设备根据G-code文件执行打印过程中，如果在G-code文件读取到耗材更换信号相关的命令代码，可以识别耗材更换信号对应的目标进料通道。本实施例提供的方法在3D打印设备执行打印过程中，能够自动识别出打印文件中的耗材更换信号，以进一步根据耗材更换信号自动识别对应的3D打印设备中多个进料通道的目标进料通道。
其中，所述控制当前进料通道对应的耗材回退至设定位置之前，打印控制方法还包括：发送停止信号给3D打印机，以使所述3D打印机的打印头移动至设置位置，并使所述打印头暂停执行打印动作。
在获取到耗材更换信号后，可以发送停止信号给3D打印机，3D打印机若接收到停止信号，3D打印机会控制打印头移动到设置位置。本实施例中的设置位置可以是打印头在未打印状态下的安全位置，该安全位置可以避免与所打印的3D模型接触，需要说明的是，在打印头暂停打印过程中，3D打印机的热床和挤出加热状态保持。另打印头移动至设置位置，可以使打印头不会在加热状态时对模型造成破坏，增加了打印精度。
其中，上述步骤S302控制当前进料通道对应的耗材回退至设定位置，并在当前进料通道对应的耗材回退至设定位置过程中，裁断所述当前进料通道对应的耗材的端部，可以包括以下A1～A3。
A1：通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第一设定位置；
耗材挤出模块可以控制耗材的前进与回退。第一设定位置的具体位置不作限定。第一设定位置可以位于进料通道与出料通道之间，或位于出料通道上。在耗材回退至第一设定位置后，耗材即可停止移动。
A2：控制所述耗材裁剪模块裁断所述当前进料通道对应的耗材的端部；
耗材裁剪模块的刀片502转动，即可将耗材裁断，以使耗材的可能为端部的疙瘩裁掉，便于该耗材后续的使用。控制所述耗材裁剪模块裁断所述当前进料通道对应的耗材的端部，控制耗材停止移动，便于耗材的裁切。
A3：通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第二设定位置。
第二设定位置可以位于进料通道内，每个进料通道都可以设置第二设定位置。第二设定位置可以位于进料通道内，使当前进料通道内的耗材不会影响目标进料通道的使用。
本申请实施例中，通过耗材挤出模块控制当前进料通道对应的耗材回退至第一设定位置；控制耗材裁剪模块裁断当前进料通道对应的耗材的端部；通过耗材挤出模块控制当前进料通道对应的耗材回退至第二设定位置，可以将耗材裁断，以使耗材的可能为端部的疙瘩裁掉，便于该耗材后续的使用，当前进料通道内的耗材不会影响目标进料通道的使用。
其中，出料通道对应设置有出料位置传感器，每个所述进料通道对应设置有进料位置传感器；上述A1通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第一设定位置，包括：通过所述耗材挤出模块控制当前进料通道对应的耗材回退，若获取到所述出料位置传感器对应的断料信号，再通过所述耗材挤出模块控制当前进料通道对应的耗材回退第一预设距离。
耗材再回退第一预设距离后，耗材的端部即位于第一设定位置。
耗材的回退，可以通过耗材挤出模块控制。断料信号，则表明出料传感器对应位置没有了耗材。若获取到出料位置传感器对应的断料信号，则表明回退的耗材的端部经过了出料位置传感器对应的位置，以此位置为基准，再控制当前进料通道对应的耗材回退第一预设距离，而不是单纯的通过耗材挤出模块控制耗材的回退长度，可以增加耗材回退位置的精准程度，另出料位置传感器对应位置和出料通道对应，即出料位置传感器对应位置距离第一设定位置较近，进一步增加了耗材回退位置的精准程度，便于后续的耗材的裁断，另出料位置传感器的位置和耗材裁剪模块的位置不同，出料位置传感器不会阻碍耗材的裁断。
本实施例中，上述A3通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第二设定位置，可以包括：通过所述耗材挤出模块控制当前进料通道对应的耗材回退，若获取到所述进料位置传感器对应的断料信号，通过所述耗材挤出模块停止当前进料通道对应的耗材的移动。
本实施例中，若获取到进料位置传感器对应的断料信号，则表明回退的耗材的端部经过了进料位置传感器对应的位置，即耗材退回至了第二设定位置。
本实施例中，以获取到所述进料位置传感器对应的断料信号为基准进行判定耗材的端部退回至第二设定位置，耗材的位置确定简单实用，提高更换耗材的效率。
其中，出料通道对应设置有出料位置传感器，上述S303控制所述目标进料通道对应的耗材的端部移动到3D打印机的打印头，可以进一步包括以下B1～B2。
B1：控制所述耗材挤出模块切换到目标通道对应的位置，并使所述目标进料通道对应的耗材进入所述出料通道内；
控制所述耗材挤出模块切换到目标通道对应的位置，即使耗材挤出模块的凸轮下压目标通道对应的压料滑轮，从而耗材挤出模块能控制目标进料通道的耗材的前进。能控制目标进料通道的耗材前进时，即可控制耗材前进至出料通道。
B2：若获取到所述出料位置传感器对应的有料信号，控制所述目标通道对应的耗材前进第二预设距离。
目标进料通道内的耗材前进至出料传感器对应的出料通道的位置，即可获取到有料信号。第二预设距离为出料位置传感器对应的位置至打印头的喷嘴的位置之间的距离，该距离可以预先测量出来。
本实施例中，通过出料位置传感器判断耗材的端部的位置，再控制耗材前进第二预设 距离，可以忽略确定耗材端部的初始位置，耗材的初始位置对耗材的前进多少没有任何影响，仅以出料位置传感器的位置为基准控制耗材的前进，减少了耗材前进的计算量，使得耗材的更换更为简单，降低了耗材的更换难度。
其中，上述A1控制当前进料通道对应的耗材回退至第一设定位置之前，打印控制方法还可以包括：控制当前进料通道对应的耗材回退；若获取到所述出料位置传感器对应的断料信号，记录所述耗材的回退距离，并将所述距离作为所述第二预设距离。
当前进料通道对应的耗材回退之前，该耗材的端部还位于打印头内，控制控制当前进料通道对应的耗材回退。若获取到所述出料位置传感器对应的断料信号，则说明耗材的端部回退至出料位置传感器对应的位置，记录所述耗材的回退距离，即打印头的端部距出料位置传感器对应位置之间的距离，该距离不用用户手动测算，通过耗材的回退长度计算第二预设距离，得到的第二预设距离更加准确，减少了用户因耗材的弯曲而测量的耗材的精度的误差。
本实施例中，在上述步骤A1控制当前进料通道对应的耗材回退至第一设定位置之前，打印控制方法还可以包括：发送停止信号给所述3D打印机，以使所述3D打印机的打印头移动至设置位置，并使所述打印头暂停执行打印动作。也就是说，在控制控制当前进料通道对应的耗材回退之前，先发送停止信号给3D打印机，并控制3D打印机的打印头移动至安全位置，避免出现耗材回退而打印头还在工作的情况。
在上述步骤B2控制所述目标通道对应的耗材前进第二预设距离之后，打印控制方法还可以包括：发送启动信号给3D打印机，以使所述3D打印机启动擦料进程，并清理耗材更换过程中打印头喷嘴漏出的耗材；或，使所述3D打印机将所述3D打印机的打印头喷嘴内的耗材打印在预设位置或挤出至废料区内。本实施例中，在控制打印头暂停执行打印动作之后，还可以对打印头上述的废料进行清理，保证耗材经过挤出机时不出现堵料、卡料情况。
在本发明实施例中，多耗材自动切换挤出装置上对应各所述进料通道分别设置有用于表征进料通道使用状态的指示灯。上述S301识别所述耗材更换信号对应的目标进料通道之后，打印控制方法还可以包括：控制所述目标进料通道对应的指示灯按照设定方式进行工作。结合图1可知，本实施例中的五个进料通道，每个进料通道下方可对应设置有LED指示灯。举例来讲，假设进料通道1中的耗材量少于设定量，那么可以控制进料通道1对应的灯持续闪烁，以提醒相关工作人员及时更换进料通道1中的耗材。
可选地，除上述介绍的之外，耗材更换信号还可以是当前进料通道中进料位置传感器检测到当前进料通道中的耗材缺料时生成的缺料信号。可选地，进料位置传感器可以为进料口微动开关，若进料口微动开关未被该进料通道中的耗材触发时的缺料信号，将缺料信号作为耗材更换信号。本实施例中，各进料通道均可设置有进料位置传感器，在当前进料通道中的耗材尾端经过当前进料通道中的进料位置传感器后，进料位置传感器被触发生成缺料信号，表示当前进料通道中的耗材量少于设定量，当3D打印机检测到当前进料通道中的进料位置传感器生成缺料信号后，可以将该缺料信号作为耗材更换信号，从而执行更换耗材的动作。本实施例提供的方式可以适用于3D打印机执行多个进料通道对应的多卷耗材自动切换连续打印时，可以实现根据切片数据可在5卷耗材间按需要进行切换打印，实现 5卷耗材的自动切换打印功能。
在本发明实施例中，若需要再次切换进料通道，并初次确定新的目标进料通道为当前进料通道时，则跳过当前进料通道，并发送提示信息或将当前进料通道的下一通道作为新的目标进料通道。前文介绍，耗材更换信号为当前进料通道中的耗材量少于设定量时触发的，假设3D打印机执行多个进料通道对应的多卷耗材自动切换连续打印时，新的目标进料通道为之前已触发耗材更换信号对应的当前进料通道时，可以跳过该当前进料通道并发出提示缺料的提示信息，或者，自动将当前进料通道的下一通道作为新的目标进料通道。避免由于耗材缺少而影响3D模型的打印进程。
下面结合图2对上述记载的打印控制方法进行详细说明。图2中，虚线L1为出料位置传感器对应位置，虚线L2和虚线L3之间为排料块通道对应位置，虚线L3为耗材裁剪模块中刀片对应位置，虚线L4为备料耗材等待点对应位置，虚线L5为挤出轮430对应位置，虚线L6为进料位置传感器对应位置。图2示出了各虚线之间的距离，单位为毫米。
实施例1
A1，3D打印机当前正在打印通道1耗材，若3D打印机读取到打印文件中具有预先设置的G代码对应的耗材更换信号，识别耗材更换信号对应的目标进料通道为通道3耗材信号；
A2，控制3D打印机的打印头移动至设定位置，使打印头不与打印模型接触，并控制打印头暂停执行打印动作，此时，3D打印机的热床和挤出加热状态保持；
A3，控制通道1对应的耗材回退，若获取到出料位置传感器对应的断料信号，记录所述耗材的回退距离；具体地，挤出电机快速回退并开始记录回退距离，若获取到耗材端部经过耗材剪裁模块的出料位置传感器后，出料位置传感器打开，此时记录下打印头喷嘴到出料口微动开关的距离A；
A4，同时挤出电机继续回退10mm，耗材剪裁模块开始工作裁剪耗材端部不规则的部分(约长16mm)并把裁剪的耗材排出通道掉入废料盒内；
A5，挤出电机继续回退36mm后，耗材前端停在等待区域，挤出电机停止工作。
A6，耗材挤出模块切换到通道3位置(凸轮轴电机带动凸轮轴组件旋转到180°位置，通道3凸轮压下压料杆)；此时挤出电机开始工作挤出通道3耗材，往前挤出直到耗材前端顶起耗材剪裁模块的出料位置传感器，出料位置传感器闭合，开始计算挤出距离M1，当M1＝A时即认为通道3的耗材已经输送到打印头喷嘴位置；
A7，发送启动信号给3D打印机，以使3D打印机启动擦料进程，清理耗材更换过程中原来残余在喷嘴内的耗材打印在预设位置如擦料塔上，或者使3D打印机将3D打印机的打印头喷嘴内的耗材直接挤出在打印机的废料区；擦料程序挤出长度约为20mm。
A8，耗材切换程序结束，恢复打印，开始打印通道3的耗材。
实施例2
B1，3D打印机当前正在打印通道1对应的耗材，并且检测到通道1的耗材量少于设定量时生成的耗材更换信号，确定耗材更换信号对应的目标进料通道为通道2；其中，当通道1的耗材尾端经过通道1的进料位置传感器后，进料位置传感器打开时生成的缺料信号作为耗材更换信号；
B2，控制3D打印机的打印头移动至设定位置，使打印头不与打印模型接触，并控制打印头暂停执行打印动作，此时，3D打印机的热床和挤出加热状态保持；
B3，控制通道1对应的耗材回退，若获取到出料位置传感器对应的断料信号，记录所述耗材的回退距离；具体地，挤出电机快速回退并开始记录回退距离，当耗材前端经过耗材剪裁模块的出料位置传感器后，出料位置传感器打开，此时记录下喷嘴到出料口微动开关的距离A；
B4，同时挤出电机继续回退10mm，耗材剪裁模块开始工作裁剪耗材前端不规则的部分(约长16mm)并把裁剪的耗材排出通道掉入废料盒内；
B5，挤出电机继续回退36mm后，耗材前端停在等待区域，挤出电机停止工作；
B6，耗材挤出模块按通道1-5的顺序切换到通道2位置(凸轮轴电机带动凸轮轴组件旋转到120°位置，通道2凸轮压下压料杆)；此时挤出电机开始工作挤出通道2耗材，往前挤出直到耗材前端顶起耗材剪裁模块的出料位置传感器，出料位置传感器闭合，开始计算挤出距离M2，当M2＝A时即认为通道2的耗材已经输送到打印头喷嘴位置；
B7，发送启动信号给3D打印机，以使3D打印机启动擦料进程，打印机开始擦料程序把等待过程中漏出喷嘴的耗材清理干净。
B8，耗材切换程序结束后恢复打印，开始打印通道2对应的耗材。在本实施例中，通道1剩余的耗材退回后通道1的指示灯持续闪烁，此时认为通道1耗材耗尽需要更换；当按顺序切换再次轮到通道1耗材时，则直接跳过通道1选择下一通道；当通道1剩余的耗材拔出后，通道1指示灯变成红色常亮，此时认为通道1耗材空缺，当按顺序切换再次轮到通道1耗材时，则直接跳过通道1选择下一通道；当通道1再次插入新的耗材后，通道1指示灯变成绿色常亮，当按顺序切换再次轮到通道1耗材时，可正常选择通道1耗材。
本发明实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质用于存储程序代码，所述程序代码用于执行上述实施例所述的打印控制方法。
本发明实施例还提供了一种多耗材自动切换挤出装置，所述多耗材自动切换挤出装置包括处理器以及存储器：所述存储器用于存储程序代码，并将所述程序代码传输给所述处理器；所述处理器用于根据所述程序代码中的指令执行上述实施例所述的打印控制方法。
本发明实施例还提供了一种3D打印设备，其设置有上述实施例的多耗材自动切换挤出装置，另外，该3D打印设备还可以包括上述介绍的多耗材自动切换挤出装置以及打印头、喷嘴等组件。
所属领域的技术人员可以清楚地了解到，上述描述的系统、装置、模块和单元的具体工作过程，可以参考前述方法实施例中的对应过程，为简洁起见，在此不另赘述。
另外，在本发明各个实施例中的各功能单元可以物理上相互独立，也可以两个或两个以上功能单元集成在一起，还可以全部功能单元都集成在一个处理单元中。上述集成的功能单元既可以采用硬件的形式实现，也可以采用软件或者固件的形式实现。本领域普通技术人员可以理解：所述集成的功能单元如果以软件的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。
基于这样的理解，本发明的技术方案本质上或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，其包括若干指令，用以 使得一台计算设备(例如个人计算机，服务器，或者网络设备等)在运行所述指令时执行本发明各实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM)、随机存取存储器(RAM)，磁碟或者光盘等各种可以存储程序代码的介质。
或者，实现前述方法实施例的全部或部分步骤可以通过程序指令相关的硬件(诸如个人计算机，服务器，或者网络设备等的计算设备)来完成，所述程序指令可以存储于一计算机可读取存储介质中，当所述程序指令被计算设备的处理器执行时，所述计算设备执行本发明各实施例所述方法的全部或部分步骤。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：在本发明的精神和原则之内，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案脱离本发明的保护范围。

Claims (10)

  1. 一种打印控制方法，其特征在于，应用于多耗材自动切换挤出装置，所述多耗材自动切换挤出装置用于与包括打印头的3D打印机配合，所述方法包括：
    若获取到耗材更换信号，识别所述耗材更换信号对应的目标进料通道；
    控制当前进料通道对应的耗材回退至设定位置，并在当前进料通道对应的耗材回退至设定位置过程中，裁断所述当前进料通道对应的耗材的端部；
    控制所述目标进料通道对应的耗材的端部移动到3D打印机的打印头，以使所述3D打印机继续执行打印动作。
  2. 根据权利要求1所述的方法，其特征在于，所述获取到耗材更换信号，识别所述耗材更换信号对应的目标进料通道，包括：
    若读取到打印文件中具有预先设置的耗材更换信号，识别所述耗材更换信号对应的目标进料通道。
  3. 根据权利要求1所述的方法，其特征在于，所述多耗材自动切换挤出装置设有耗材挤出模块，用于驱使所述进料通道中的耗材进入所述出料通道或进行回退，所述多耗材自动切换挤出装置还包括多个进料通道和一个出料通道，以及所述出料通道上的裁剪模块，所述控制当前进料通道对应的耗材回退至设定位置，并在当前进料通道对应的耗材回退至设定位置过程中，裁断所述当前进料通道对应的耗材的端部，包括：
    通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第一设定位置；
    控制所述耗材裁剪模块裁断所述当前进料通道对应的耗材的端部；
    通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第二设定位置。
  4. 根据权利要求3所述的方法，其特征在于，所述出料通道对应设置有出料位置传感器，每个所述进料通道对应设置有进料位置传感器；
    所述通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第一设定位置，包括：
    通过所述耗材挤出模块控制当前进料通道对应的耗材回退，若获取到所述出料位置传感器对应的断料信号，再通过所述耗材挤出模块控制当前进料通道对应的耗材回退第一预设距离；
    所述通过所述耗材挤出模块控制当前进料通道对应的耗材回退至第二设定位置，包括：
    通过所述耗材挤出模块控制当前进料通道对应的耗材回退，若获取到所述进料位置传感器对应的断料信号，通过所述耗材挤出模块停止当前进料通道对应的耗材的移动。
  5. 根据权利要求1所述的方法，其特征在于，所述多耗材自动切换挤出装置设有耗材挤出模块，用于驱使所述进料通道中的耗材进入所述出料通道或进行回退，所述多耗材自动切换挤出装置还包括多个进料通道和一个出料通道，以及所述出料通道上的裁剪模块，所述出料通道对应设置有出料位置传感器，所述控制所述目标进料通道对应的耗材的端部移动到3D打印机的打印头，包括：
    控制所述耗材挤出模块切换到目标通道对应的位置，并使所述目标进料通道对应的耗材进入所述出料通道内；
    若获取到所述出料位置传感器对应的有料信号，控制所述目标通道对应的耗材前进第二预设距离。
  6. 根据权利要求5所述的方法，其特征在于，所述控制当前进料通道对应的耗材回退至第一设定位置之前，所述方法还包括：
    控制当前进料通道对应的耗材回退；
    若获取到所述出料位置传感器对应的断料信号，记录所述耗材的回退距离，并将所述距离作为所述第二预设距离。
  7. 根据权利要求5中任一项所述的方法，其特征在于，所述控制当前进料通道对应的耗材回退至设定位置之前，所述方法还包括：
    发送停止信号给所述3D打印机，以使所述3D打印机的打印头移动至设置位置，并使所述打印头暂停执行打印动作；
    所述控制所述目标通道对应的耗材前进第二预设距离之后，所述方法还包括：
    发送启动信号给3D打印机，以使所述3D打印机启动擦料进程，并清理耗材更换过程中打印头喷嘴漏出的耗材；或，使所述3D打印机将所述3D打印机的打印头喷嘴内的耗材打印在预设位置或挤出至废料区内。
  8. 根据权利要求1-7中任一项所述的方法，其特征在于，所述多耗材自动切换挤出装置上对应各所述进料通道分别设置有用于表征进料通道使用状态的指示灯；
    所述识别所述耗材更换信号对应的目标进料通道之后，还包括：
    控制所述目标进料通道对应的指示灯按照设定方式进行工作。
  9. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储程序代码，所述程序代码用于执行权利要求1-8中任一项所述的打印控制方法。
  10. 一种多耗材自动切换挤出装置，其特征在于，所述多耗材自动切换挤出装置包括处理器以及存储器：
    所述存储器用于存储程序代码，并将所述程序代码传输给所述处理器；
    所述处理器用于根据所述程序代码中的指令执行权利要求1-8中任一项所述的打印控制方法。
PCT/CN2022/143861 2021-12-30 2022-12-30 一种打印控制方法、存储介质及多耗材自动切换挤出装置 WO2023125921A1 (zh)

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