Control method and device of 3D printer, electronic equipment and storage medium

Abstract

The invention relates to the technical field of 3D printing, in particular to a control method and device of a 3D printer, electronic equipment and a storage medium, and the method comprises the steps that in response to a printing instruction, a heating cavity operates so that internal ink can be maintained within a specified working temperature range; acquiring a negative pressure value of a negative pressure air box in a target negative pressure air path corresponding to the target ink; judging whether the negative pressure value is equal to a preset negative pressure threshold value corresponding to the target ink or not; and if not, the target negative pressure gas path is adjusted according to the comparison relation between the negative pressure value and the negative pressure threshold value. According to the control method and device of the 3D printer, the electronic equipment and the storage medium, the negative pressure air box connected with the target negative pressure air box in series is additionally arranged in the air path adjusting process, so that air flow fluctuation oscillation in the negative pressure adjusting process is reduced, the stability of a system is improved, the conditions of insufficient ink supply and bubbles are reduced, and the service life of the system is prolonged. The present invention improves the generality of ink circulation.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a control method, device, electronic equipment and storage medium of a 3D printer. Background Art

[0002] At present, MJP 3D printers require two materials with different physical properties, structure and support, for printing and molding. The structure material is responsible for the molding of the product, and the support material supports the product. The structure material has a higher viscosity, and after printing and molding, it has the characteristics of stable structure and not easy to deform; the support material has a lower viscosity, and after printing and molding, it is easy to separate from the structure material. Therefore, a set of ink control system is needed to be fully compatible with two materials with different characteristics for 3D printing to avoid ink dripping, clogging, insufficient ink supply and other phenomena. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a control method, device, electronic device and storage medium for a 3D printer.

[0004] In a first aspect, an embodiment of the present invention provides a control method for a 3D printer, the method comprising:

[0005] In response to a print command, the heat generating chamber will operate to maintain the internal ink within a specified operating temperature range;

[0006] Obtaining a negative pressure value of a negative pressure air box in a target negative pressure air circuit corresponding to the target ink;

[0007] Determine whether the negative pressure value is equal to a preset negative pressure threshold corresponding to the target ink;

[0008] If not, adjust the target negative pressure air circuit according to the comparison relationship between the negative pressure value and the negative pressure threshold; wherein, the negative pressure air box in the target negative pressure air circuit is connected in series with an auxiliary negative pressure air box, and the auxiliary negative pressure air box is used to buffer the air pressure fluctuations generated during the adjustment of the target negative pressure air circuit.

[0009] In combination with the first aspect, the step of adjusting the gas path according to the comparison relationship between the negative pressure value and the preset negative pressure threshold value includes:

[0010] If the negative pressure value is greater than the preset negative pressure threshold, the target pressure relief solenoid valve on the target negative pressure gas path is opened until the negative pressure value after pressure relief is equal to the preset negative pressure threshold, and then the pressure relief solenoid valve is closed.

[0011] In combination with the first aspect, the step of adjusting the gas path according to the comparison relationship between the negative pressure value and the preset negative pressure threshold value includes:

[0012] If the negative pressure value is less than the preset negative pressure threshold, the target negative pressure pump on the target negative pressure air path is turned on until the negative pressure value is equal to the preset negative pressure threshold, and then the target negative pressure pump is turned off.

[0013] In combination with the first aspect, after the step of determining whether the negative pressure value is equal to the preset negative pressure threshold, the method further includes:

[0014] If yes, under the action of negative pressure, the target ink enters the nozzle from the corresponding target ink inlet cavity and then flows back to the target ink return cavity;

[0015] Obtain the liquid level value in the target ink return chamber;

[0016] If the liquid level value reaches the target liquid level value, the target ink pump corresponding to the target ink is turned on to allow the ink to flow out of the ink return chamber, and then flow into the target ink inlet chamber after passing through the target ink return buffer chamber, the target one-way valve, the target ink pump, the target filter, and the target ink inlet buffer chamber.

[0017] In combination with the first aspect, the method further includes:

[0018] In response to the cleaning instruction, all ink pumps are controlled to stop running, all ink inlet chamber solenoid valves are powered off, and all ink return solenoid valves are turned on, so that the air paths of all ink inlet chambers are connected to the air path where the positive pressure pump is located;

[0019] The positive pressure pump is controlled to run so as to introduce compressed air into each ink inlet cavity and each ink return cavity through the air path at the same time so as to clean each nozzle.

[0020] In combination with the first aspect, the method further includes:

[0021] When the machine is shut down or powered off, the power-off protection solenoid valve is reset to connect the gas circuits between all the negative pressure gas boxes.

[0022] In combination with the first aspect, in the shutdown or power-off state, the power-off protection solenoid valve is reset to connect the gas circuits between all the negative pressure gas boxes, and the step also includes:

[0023] At the same time, all the ink pumps stop and all the solenoid valves of the ink inlet chambers are closed, and the air circuit connections between each ink inlet chamber and the negative pressure air circuit are opened.

[0024] In a second aspect, the present application provides a control device for a 3D printer, which is applied to an ink circulation architecture, wherein the ink circulation architecture includes a negative pressure air circuit, wherein the negative pressure air circuit is used to generate negative pressure to guide the ink in the ink return chamber to the ink inlet chamber; the device includes:

[0025] A response module, used for responding to a printing instruction, and operating the heating chamber to maintain the internal ink within a specified working temperature range;

[0026] An acquisition module, used for acquiring a negative pressure value of a negative pressure air box in a target negative pressure air path corresponding to a target ink;

[0027] A judging module, used to judge whether the negative pressure value is equal to a preset negative pressure threshold corresponding to the target ink;

[0028] An adjustment module is used to adjust the target negative pressure air circuit according to the comparison relationship between the negative pressure value and the negative pressure threshold when the negative pressure value is not equal to the preset negative pressure threshold corresponding to the target ink; wherein the negative pressure air box in the target negative pressure air circuit is connected in series with an auxiliary negative pressure air box, and the auxiliary negative pressure air box is used to buffer the air pressure fluctuations generated during the adjustment of the target negative pressure air circuit.

[0029] In a third aspect, the present application provides an electronic device, which includes a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the above method.

[0030] In a fourth aspect, the present application provides a readable storage medium, in which computer program instructions are stored. When the computer program instructions are read and executed by a processor, the above method is executed.

[0031] The embodiments of the present invention bring the following beneficial effects: the control method, device, electronic device and storage medium of the 3D printer provided by the present application, in the process of adjusting the air circuit, a negative pressure air box is added in series with the target negative pressure air box to reduce the air flow fluctuation oscillation during the negative pressure adjustment process, thereby improving the stability of the system, reducing the situation of insufficient ink supply and bubbles, and improving the normality of ink circuit circulation.

[0032] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A flow chart of a control method for a 3D printer provided by an embodiment of the present invention;

[0036] Figure 2A working principle diagram of the ink circulation architecture provided by an embodiment of the present invention;

[0037] Figure 3 A schematic front view of an ink circulation architecture provided by an embodiment of the present invention;

[0038] Figure 4 Another schematic diagram of an ink circulation architecture provided by an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of the structure of a control device for a 3D printer provided by an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0041] Reference numerals:

[0042] 1-nozzle, 11-nozzle inlet, 12-nozzle outlet, 1A-first nozzle, 1B-second nozzle;

[0043] 2- ink flow path, 21- valve, 22- ink pump, 23- ink filter, 21A- first valve, 21B- second valve, 22A- first ink pump, 22B- second ink pump;

[0044] 3-negative pressure air circuit, 3A-first negative pressure air circuit, 3B-second negative pressure air circuit, 31-ink return chamber solenoid valve, 31A-first ink return chamber solenoid valve, 31B-second ink return chamber solenoid valve, 32-auxiliary negative pressure air box, 32A-first auxiliary negative pressure air box, 32B-second auxiliary negative pressure air box, 33-negative pressure air box, 33A-first negative pressure air box, 33B-second negative pressure air box, 34-negative pressure pump, 34A-first negative pressure pump, 34B-second negative pressure pump, 35-pressure relief solenoid valve, 35A-first pressure relief solenoid valve, 35B-second pressure relief solenoid valve, 36-pressure relief capillary, 36A-first pressure relief capillary, 36B-second pressure relief capillary, 37-air filter, 37A-first air filter, 37B-second air filter;

[0045] 4-pressure sensing component;

[0046] 51-ink inlet cavity, 51A-first ink inlet cavity, 51B-second ink inlet cavity, 511-ink inlet cavity air chamber, 512-temperature sensor assembly, 513-ink inlet cavity liquid level switch, 514-ink inlet cavity solenoid valve, 52-ink inlet buffer cavity, 52A-first ink inlet buffer cavity, 52B-second ink inlet buffer cavity, 53-ink return cavity, 53A-first ink return cavity, 53B-second ink return cavity, 531-ink return cavity air chamber, 532-ink return cavity liquid level switch, 54-ink return buffer cavity, 54A-first ink return buffer cavity, 54B-second ink return buffer cavity;

[0047] 6-heating cavity;

[0048] 7- Positive pressure pump;

[0049] 8-Power off protection valve

[0050] 100-response module, 200-acquisition module, 300-judgment module, 400-adjustment module;

[0051] 130 - processor, 131 - memory, 132 - bus, 133 - communication interface. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0053] In order to facilitate the understanding of this embodiment, the technical terms designed in this application are briefly introduced below.

[0054] 3D printing (3DP), also known as additive manufacturing technology, is a technology that manufactures physical parts by adding materials layer by layer based on three-dimensional data.

[0055] The general process of additive manufacturing technology is: first, use computer-aided modeling software (such as CAD software) to design a required three-dimensional model. Then use slicing software to process the data of this model. The 3D printer will select a molding method from a variety of molding principles and print the raw materials layer by layer according to these working paths. When the two-dimensional sheets are stacked together layer by layer, the designed three-dimensional model is manufactured. Finally, after the printed model is removed, it needs to be properly post-processed.

[0056] After introducing the technical terms involved in this application, the application scenarios and design concepts of the embodiments of this application are briefly introduced.

[0057] Existing 3D printers have problems with poor ink supply and insufficient ink supply during the ink circulation process, and the user experience needs to be improved.

[0058] Based on this, the embodiments of the present application provide a control method, device, electronic device, and storage medium for a 3D printer.

[0059] Example 1

[0060] The present application provides a control method for a 3D printer, combining Figure 1As shown, the method includes:

[0061] S110, in response to a printing instruction, the heating chamber operates to maintain the internal ink within a specified operating temperature range.

[0062] S120, obtaining a negative pressure value of a negative pressure air box in a target negative pressure air circuit corresponding to the target ink.

[0063] S130, determining whether the negative pressure value is equal to a preset negative pressure threshold corresponding to the target ink.

[0064] If not, execute step S140.

[0065] S140, if not, adjust the target negative pressure air circuit according to the comparison relationship between the negative pressure value and the negative pressure threshold; wherein, the negative pressure air box in the target negative pressure air circuit is connected in series with an auxiliary negative pressure air box, and the auxiliary negative pressure air box is used to buffer the air pressure fluctuations generated during the adjustment of the target negative pressure air circuit.

[0066] In the present application, during the 3D printing process, the solid printing medium (such as wax material) is melted into a liquid and introduced into the heating cavity. The heating cavity is operated to keep the internal ink in a relatively stable temperature state. The negative pressure value in the negative pressure air box is first obtained and compared with the negative pressure threshold to determine whether the preset negative pressure threshold required for ink circulation during the 3D printing process is reached. If not, the target negative pressure air path is adjusted. At the same time, the auxiliary negative pressure air box in series is used to slow down air pressure fluctuations, avoid bubbles and poor ink circulation, and improve the stability and smoothness of ink output.

[0067] Combination Figure 2 , Figure 3 As shown, the ink circulation architecture in the 3D printer provided in this embodiment includes: a nozzle 1, a flow ink path 2, and a negative pressure air path 3.

[0068] The nozzle 1 has an input end (combined with "IN" in the figure) and an output end (combined with "OUT" in the figure), the input end is connected with the ink inlet chamber 51 through the nozzle inlet channel 11; the output end is connected with the ink return chamber 53 through the nozzle outlet channel 12; the ink inlet chamber 51 is connected with the ink inlet buffer chamber 52, and an ink inlet chamber air chamber 511 is opened at the upper part of the ink inlet chamber 51; the ink return chamber 53 is also connected with the ink return buffer chamber 54, and an ink return chamber air chamber 531 is opened at the upper part of the ink return chamber 53.

[0069] One end of the flowing ink path 2 is connected to the ink return buffer chamber 54, and the other end is connected to the ink inlet buffer chamber 52; the flowing ink path 2 is sequentially provided with valves 21 and ink pumps 22 along the direction from the ink return buffer chamber 54 to the ink inlet buffer chamber 52; the valves 21 and the ink pumps 22 are opened to guide the ink in the ink return chamber 53 to the ink inlet chamber 51.

[0070] One end of the negative pressure air circuit 3 is connected to the ink return chamber air chamber 531, and the other end is connected in sequence to the ink return chamber solenoid valve 31, the auxiliary negative pressure air box 32, the negative pressure air box 33 and the negative pressure pump 34; opening the ink return chamber solenoid valve 31 is used to conduct the negative pressure air circuit 3, so that the ink in the ink inlet chamber 51 can flow back to the ink return chamber 53 under the action of negative pressure.

[0071] In this embodiment, the flowing ink path 2 can guide the ink in the ink return chamber 53 to the ink inlet chamber 51, and under the action of the negative pressure air path 3, the ink inlet chamber 51 can be guided to flow back to the ink return chamber 53, thereby realizing ink circulation under the action of negative pressure. In the process of adjusting the negative pressure in the negative pressure air path, an auxiliary negative pressure air box 32 is added to reduce air flow oscillation, which is conducive to stable and smooth ink circulation.

[0072] In this way, under the joint action of the negative pressure air circuit 3 and the flowing ink circuit 2, the ink in the nozzle 1 is in a circulating state, which can not only ensure that the ink in the supporting ink nozzle 1 is sufficient and continuous, but also take away the bubbles and sediments in the ink, thereby reducing the phenomenon of insufficient ink supply, bubbles, and blockage of the supporting ink nozzle 1.

[0073] Furthermore, an ink filter 23 is provided on the ink flow path 2. The ink filter 23 is provided between the ink pump 22 and the ink inlet buffer chamber 52. The ink is filtered before the ink refluxes and recirculates to the ink inlet buffer chamber 52 to reduce bubbles and sediments.

[0074] It is understandable that different ink circulation structures correspond to different ink needs. For example, in the present application, two types of inks are included, namely support ink and structural ink, and the support ink and structural ink can be further subdivided according to different ink materials. For example, the support ink includes a removable support wax material or a photosensitive resin support material, and the support material can be washed away by a solvent or water, and the structural ink includes a modeling wax material or a photosensitive resin, which is usually insoluble in a solvent or water. At this time, each subdivided type of ink should correspond to a set of ink circulation structures to realize the circulation of the type of ink.

[0075] In the embodiment of the present application, a supporting ink and a structural ink having only one material are taken as an example. Thus, there should be one set of ink circulation architectures corresponding to the supporting ink and another set of ink circulation architectures corresponding to the structural ink.

[0076] Combination Figure 4As shown, the supporting ink return chamber (first ink return chamber 53A), the supporting return buffer chamber (i.e., the first ink return buffer chamber 54A), the supporting ink inlet chamber (first ink inlet chamber 51A), the supporting inlet buffer chamber (first ink inlet buffer chamber 52A) corresponding to the supporting ink and the structural ink return chamber (second ink return chamber 53B), the structural return buffer chamber (second ink return buffer chamber 54B), the structural ink inlet chamber (second ink inlet chamber 51B), and the structural inlet buffer chamber (second ink inlet buffer chamber 52B) corresponding to the structural ink should be arranged in the same heating cavity 6 to simplify the structure and arrange the layout reasonably.

[0077] Combination Figure 4 As shown, in the first set of ink circulation architecture corresponding to the supporting ink, the first negative pressure air circuit 3A includes: a first ink return chamber solenoid valve 31A, a first auxiliary negative pressure air box 32A, a first negative pressure air box 33A, and a first negative pressure pump 34A. The first negative pressure air box 33A is also connected to the first pressure relief solenoid valve 35A, the first pressure relief capillary 36A and the first air filter 37A.

[0078] Similarly, in the second ink circulation architecture corresponding to the structural ink, the second negative pressure air circuit 3B includes: a second ink return chamber solenoid valve 31B, a second auxiliary negative pressure air box 32B, a second negative pressure air box 33B, and a second negative pressure pump 34B. The second negative pressure air box 33B is also connected to the second pressure relief solenoid valve 35B, the second pressure relief capillary 36B and the second air filter 37B.

[0079] In combination with the first aspect, step S140 includes:

[0080] S141, if the negative pressure value is greater than the preset negative pressure threshold, open the target pressure relief solenoid valve on the target negative pressure gas path until the negative pressure value after pressure relief is equal to the preset negative pressure threshold, and then close the target pressure relief solenoid valve.

[0081] Combination Figure 3 As shown, the pressure relief solenoid valve 35 is also connected to the pressure relief capillary 36 and the air filter 37. When the negative pressure in the negative pressure air box 33 is too large, that is, the negative pressure in the negative pressure air circuit 3 is too large, the negative pressure value needs to be adjusted. At this time, the pressure relief solenoid valve 35 can be controlled to open by the control unit to relieve pressure.

[0082] Combination Figure 3 As shown, when the negative pressure value of the first negative pressure air path 3A corresponding to the supporting ink is too large and needs to be reduced, the first pressure relief solenoid valve 35A is opened to relieve pressure through the first pressure relief capillary 36A and the first air filter 37A. Similarly, when the negative pressure value of the second negative pressure air path 3B corresponding to the structural ink needs to be reduced, the second pressure relief solenoid valve 35B is opened to relieve pressure through the second pressure relief capillary 36B and the second air filter 37B.

[0083] In combination with the first aspect, step S140 includes:

[0084] S142, if the negative pressure value is less than the preset negative pressure threshold, turn on the target negative pressure pump on the target negative pressure air path until the negative pressure value is equal to the preset negative pressure threshold, and then turn off the target negative pressure pump.

[0085] Combination Figure 3 As shown, when the negative pressure in the negative pressure air circuit 3 is insufficient to supply the negative pressure required for ink circulation, the negative pressure pump 34 should be opened in time to supplement the negative pressure.

[0086] Specific, combined Figure 4 As shown, when the negative pressure of the first negative pressure air circuit 3A corresponding to the supporting ink is insufficient, the first negative pressure pump 34A on the first negative pressure air circuit 3A is turned on to supplement the pressure; similarly, when the negative pressure of the second negative pressure air circuit 3B corresponding to the structural ink is insufficient, the second negative pressure pump 34B is turned on.

[0087] The ink circulation structure further includes: a pressure sensing component 4, which is arranged in the negative pressure air circuit 3, and the pressure sensing component 4 is connected to the control unit.

[0088] It can be understood that the pressure sensing component 4 is used to detect the negative pressure value of the negative pressure box 33 in the negative pressure air circuit 3, and transmit the detected data (i.e., the "negative pressure value") to the control unit, so that the control unit automatically determines whether the negative pressure value meets the ink circulation demand based on a preset program. If the negative pressure value is too large, the pressure should be released in time, specifically by opening the pressure relief solenoid valve 35, and the excess negative pressure is discharged to the outside air through the pressure relief capillary 36 and the air filter 37; on the contrary, if the negative pressure value is too small, the negative pressure should be supplemented in time, specifically by the pneumatic negative pressure pump 34. This is a relatively common logic judgment and control function, which can be realized by existing chips, PLCs, etc., and will not be elaborated here.

[0089] It is understandable that the negative pressure values ​​required for the circulation corresponding to different inks are different. In this embodiment, the preset negative pressure threshold can be adjusted according to the actual ink used before 3D printing to improve the applicability of use.

[0090] In addition, the pressure sensing component 4 as a pressure detection component can be a pressure sensor, a pressure gauge, a pressure detection probe, etc. The pressure sensing component 4 needs to have good detection accuracy to ensure the stability and effectiveness of the equipment operation. Therefore, the pressure sensing component 4 should be calibrated before actual application.

[0091] In combination with the first aspect, after step S130, the method further includes:

[0092] If so, execute steps S150-S170.

[0093] S150, under the action of negative pressure, the target ink enters the nozzle from the corresponding ink inlet cavity and then flows back to the ink return cavity.

[0094] S160, obtaining the liquid level value in the ink return chamber.

[0095] S170, if the liquid level value reaches the target liquid level value, turn on the target ink pump corresponding to the target ink, so that the ink flows out from the ink return cavity, passes through the target ink return buffer cavity, the target one-way valve, the target ink pump, the target filter, the target ink inlet buffer cavity in sequence, and then flows into the target ink inlet cavity.

[0096] Combination Figure 2 , Figure 3 As shown, the ink circulation structure also includes: a heating cavity 6, an ink inlet cavity 51, an ink inlet buffer cavity 52, an ink return buffer cavity 54 and an ink return cavity 53 which are respectively arranged in the heating cavity 6.

[0097] The heating chamber 6 generates heat to heat the ink in the ink inlet chamber 51, the ink inlet buffer chamber 52, the ink return buffer chamber 54 and the ink return chamber 53 to maintain the concentration required for performing 3D printing operations. By combining the temperature monitoring of the temperature sensing component 512, the amount of heat generated by the heating component in the heating chamber 6 is adjusted to maintain a more suitable temperature.

[0098] In addition, combined Figure 2 , Figure 3 As shown, the ink circulation architecture also includes: an ink inlet chamber liquid level switch 513 and an ink return chamber liquid level switch 532, the ink inlet chamber liquid level switch 513 is arranged in the ink inlet chamber 51; the ink return chamber liquid level switch 532 is arranged in the ink return chamber 53; the ink inlet chamber liquid level switch 513 and the ink return chamber liquid level switch 532 are respectively connected to the control unit.

[0099] Under the action of the negative pressure air circuit 3, the ink in the ink inlet chamber 51 continuously flows through the nozzle 1 to the ink return chamber 53. With the circulation of the ink, the liquid levels in the ink inlet chamber 51 and the ink return chamber 53 change dynamically. When the liquid level in the ink inlet chamber 51 rises until it reaches a preset liquid level value, the ink inlet chamber liquid level switch 513 will be triggered, and the ink inlet chamber liquid level switch 513 will send a signal to the control unit. The control unit can confirm that the amount of ink in the ink inlet chamber 51 has reached the upper limit after receiving the signal; similarly, when the ink return chamber liquid level switch 532 is triggered, the ink return chamber liquid level switch 532 will send a signal to the control unit. The control unit can confirm that the amount of ink in the ink return chamber 53 has reached the upper limit after receiving the signal, and it should be diverted in time. At this time, the ink pump 22 and the valve 21 in the flow ink circuit 2 will be opened to promote the ink to flow to the ink inlet chamber 51.

[0100] Combination Figure 4As shown, in the printing or standby state, the first ink circulation structure corresponding to the supporting ink is running, and the second ink circulation structure corresponding to the structural ink is running. Under the action of the first valve 21A and the first ink pump 22A, the ink in the first ink return chamber 53A is guided to the first ink inlet chamber 51A. Specifically, the ink flows out from the first ink return chamber 53A, passes through the first ink return buffer chamber 54A, the first valve 21A, the first ink pump 22A, and the first ink inlet buffer chamber 52A in sequence and flows to the first ink inlet chamber 51A; similarly, under the action of the second valve 21B and the second ink pump 22B, the ink in the second ink return chamber 53B is guided to the second ink inlet chamber 51B. Specifically, the ink flows out from the second ink return chamber 53B, passes through the second ink return buffer chamber 54B, the second valve 21B, the second ink pump 22B, and the second ink inlet buffer chamber 52B in sequence and flows to the second ink inlet chamber 51B.

[0101] Combined with the first aspect, Figure 5 As shown, the method also includes:

[0102] S210, in response to the cleaning instruction, all ink pumps are controlled to stop running, all ink inlet chamber solenoid valves are powered off, and all ink return solenoid valves are turned on, so that the air paths of all ink inlet chambers are connected to the air path where the positive pressure pump is located.

[0103] S220, controlling the positive pressure pump to operate so as to introduce compressed air into each ink inlet cavity and each ink return cavity through the air path at the same time, so as to clean each nozzle.

[0104] Combination Figure 4 As shown, in the cleaning state, the first ink pump 22A and the second ink pump 22B are turned off at the same time, the ink inlet chamber electromagnetic valve 514 is powered off, and the first ink return chamber electromagnetic valve 31A and the second ink return chamber electromagnetic valve 31B are powered on, so that the first ink return chamber 53A and the second ink return chamber 53B are respectively connected to the air path where the positive pressure pump 7 is located. In this way, compressed air simultaneously enters the first ink inlet chamber air chamber, the second ink inlet chamber air chamber, and the first ink return chamber air chamber and the second ink return chamber air chamber to clean the first nozzle 1A and the second nozzle 1B at the same time.

[0105] In combination with the first aspect, the method further includes:

[0106] S310, when the machine is shut down or powered off, the power-off protection solenoid valve is reset to connect the air circuits between all the negative pressure gas boxes.

[0107] Combination Figure 4As shown, a power-off protection valve 8 is provided between the second negative pressure gas box 33B and the first negative pressure gas box 33A. In the case of power failure or shutdown, the power-off protection valve 8 conducts the connecting pipeline between the second negative pressure gas box 33B and the first negative pressure gas box 33A. At this time, the air paths in the second ink inlet cavity 51B corresponding to the structural ink and the first ink inlet cavity 51A corresponding to the supporting ink are connected to the first negative pressure gas box 33A through the ink inlet cavity solenoid valve 514, the first ink return cavity solenoid valve 31A, the first auxiliary negative pressure gas box 32A; the air path in the first ink return cavity 53A corresponding to the supporting ink is connected to the first negative pressure gas box 33A through the first ink return cavity solenoid valve 31A and the first auxiliary negative pressure gas box 32A; the air path in the second ink return cavity 53B corresponding to the structural ink is connected to the second negative pressure gas box 33B through the second ink return cavity solenoid valve 31B and the second auxiliary negative pressure gas box 32B; the air paths of the first negative pressure gas box 33A and the second negative pressure gas box 33B are connected through the power-off protection valve. That is to say, in the case of power failure, the air pressure value of each chamber in the heating cavity 6 is in a negative pressure state, which can offset the self-gravity of the ink dripping to the nozzles of the first nozzle 1A and the second nozzle 1B, thereby playing the role of power failure protection.

[0108] In combination with the first aspect, step S310 further includes:

[0109] S320, at the same time, all ink pumps stop and all ink inlet chamber solenoid valves are closed, and the air circuit connections between each ink inlet chamber and the negative pressure air circuit are opened.

[0110] That is to say, in case of power failure, the air pressure in each chamber in the heating cavity 6 is in a negative pressure state, which can offset the gravity of the ink dripping to the nozzles of the first nozzle 1A and the second nozzle 1B, thereby playing a role of power failure protection.

[0111] In a second aspect, the present application provides a control device for a 3D printer, which is applied to an ink circulation structure, wherein the ink circulation structure includes a negative pressure air circuit 3, and the negative pressure air circuit 3 is used to generate negative pressure to guide the ink in the ink return cavity 53 to the ink inlet cavity 51. Figure 5 As shown, the device includes: a response module 100, an acquisition module 200, a judgment module 300 and an adjustment module 400.

[0112] The response module 100 is used to respond to the printing instruction, and the heating chamber operates to maintain the internal ink within a specified working temperature range.

[0113] The acquisition module 200 is used to acquire the negative pressure value of the negative pressure air box in the target negative pressure air circuit corresponding to the target ink.

[0114] The determination module 300 is used to determine whether the negative pressure value is equal to a preset negative pressure threshold corresponding to the target ink.

[0115] The adjustment module 400 is used to adjust the target negative pressure air circuit according to the comparison relationship between the negative pressure value and the negative pressure threshold when the negative pressure value is not equal to the preset negative pressure threshold corresponding to the target ink; wherein the negative pressure air box in the target negative pressure air circuit is connected in series with an auxiliary negative pressure air box, and the auxiliary negative pressure air box is used to buffer the air pressure fluctuations generated during the adjustment of the target negative pressure air circuit.

[0116] In a third aspect, the present application provides an electronic device, Figure 6 As shown, the electronic device includes a memory 131 and a processor 130. The memory 131 is used to store computer programs, and the processor 130 runs the computer programs to enable the electronic device to perform the above method.

[0117] Furthermore, combined with Figure 6 The electronic device shown further includes a bus 132 and a communication interface 133 , and the processor 130 , the communication interface 133 and the memory 131 are connected via the bus 132 .

[0118] The memory 131 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 133 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 132 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0119] The processor 130 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 130. The above processor 130 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 131, and the processor 130 reads the information in the memory 131 and completes the steps of the method of the above embodiment in combination with its hardware.

[0120] In a fourth aspect, an embodiment of the present application provides a readable storage medium, in which computer program instructions are stored. When the computer program instructions are read and executed by a processor, the above method is executed.

[0121] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0122] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0123] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0124] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0125] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A control method for a 3D printer, characterized in that: The method comprises: In response to a printing instruction, the heating chamber operates to maintain the internal ink within a specified operating temperature range; Obtaining a negative pressure value of a negative pressure air box in a target negative pressure air circuit corresponding to the target ink; Determining whether the negative pressure value is equal to a preset negative pressure threshold corresponding to the target ink; If not, adjust the target negative pressure air circuit according to the comparison relationship between the negative pressure value and the negative pressure threshold; wherein, the negative pressure air box is connected in series with an auxiliary negative pressure air box, and the auxiliary negative pressure air box is used to buffer the air pressure fluctuations generated during the adjustment of the target negative pressure air circuit.

2. The method according to claim 1, characterized in that The step of adjusting the gas path according to the comparison relationship between the negative pressure value and a preset negative pressure threshold value comprises: If the negative pressure value is greater than the preset negative pressure threshold, the target pressure relief solenoid valve on the target negative pressure gas path is opened until the negative pressure value after pressure relief is equal to the preset negative pressure threshold, and then the pressure relief solenoid valve is closed.

3. The method according to claim 1, characterized in that The step of adjusting the gas path according to the comparison relationship between the negative pressure value and a preset negative pressure threshold value comprises: If the negative pressure value is less than the preset negative pressure threshold, the target negative pressure pump on the target negative pressure air path is turned on until the negative pressure value is equal to the preset negative pressure threshold, and then the target negative pressure pump is turned off.

4. The method according to claim 1, characterized in that: After the step of determining whether the negative pressure value is equal to a preset negative pressure threshold, the method further includes: If yes, under the action of negative pressure, the target ink enters the nozzle from the corresponding target ink inlet cavity and then flows back to the target ink return cavity; Obtaining the target ink return chamber liquid level value; If the liquid level value reaches the target liquid level value, the target ink pump corresponding to the target ink is turned on to allow the ink to flow out of the ink return chamber, and then flow into the target ink inlet chamber after passing through the target ink return buffer chamber, the target one-way valve, the target ink pump, the target filter, and the target ink inlet buffer chamber in sequence.

5. The method according to claim 1, characterized in that The method further comprises: In response to the cleaning instruction, all ink pumps are controlled to stop running, all ink inlet chamber solenoid valves are powered off, and all ink return solenoid valves are turned on, so that the air paths of all ink inlet chambers are connected to the air path where the positive pressure pump is located; The positive pressure pump is controlled to run so as to introduce compressed air into each of the ink inlet chambers and each of the ink return chambers through the air path at the same time so as to clean each of the nozzles.

6. The method according to claim 1, characterized in that The method further comprises: When the machine is shut down or powered off, the power-off protection solenoid valve is reset to connect the gas circuits between all the negative pressure gas boxes.

7. The method according to claim 1, characterized in that In the shutdown or power-off state, the power-off protection solenoid valve is reset to conduct the gas path connection between all the negative pressure gas boxes, and also includes: At the same time, all the ink pumps stop and all the solenoid valves of the ink inlet chambers are closed, and the air circuit connections between each ink inlet chamber and the negative pressure air circuit are opened.

8. A control device for a 3D printer, characterized in that: Applied to an ink circulation structure, the ink circulation structure includes a negative pressure air circuit, the negative pressure air circuit is used to generate negative pressure to guide the ink in the ink return chamber to the ink inlet chamber; the device includes: A response module, used for responding to a printing instruction, and operating the heating chamber to maintain the internal ink within a specified working temperature range; An acquisition module, used for acquiring a negative pressure value of a negative pressure air box in a target negative pressure air path corresponding to a target ink; A judging module, used for judging whether the negative pressure value is equal to a preset negative pressure threshold value corresponding to the target ink; An adjustment module is used to adjust the target negative pressure air circuit according to the comparison relationship between the negative pressure value and the negative pressure threshold when the negative pressure value is not equal to the preset negative pressure threshold corresponding to the target ink; wherein the negative pressure air box is connected in series with an auxiliary negative pressure air box, and the auxiliary negative pressure air box is used to buffer the air pressure fluctuations generated during the adjustment of the target negative pressure air circuit.

9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to perform the method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores computer program instructions, and when the computer program instructions are read and executed by a processor, the method according to any one of claims 1 to 7 is executed.

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