Spray head partition heating control method, related device and 3D printing head

Abstract

The invention provides a spray head partition heating control method, a related device and a 3D printing head, the spray head partition heating control method is applied to the 3D printing head, and the printing head is provided with a first heating assembly and a second heating assembly which are sequentially distributed in the conveying direction of printing consumables and used for heating the printing consumables; the control method comprises the steps that under the condition that the preset printing stopping condition is met, the temperature of the first heating assembly is controlled to be adjusted from the first temperature to the second temperature, and the second temperature is lower than the first temperature; by the adoption of the method, under the condition that printing of current consumables is about to be finished, the temperature of the first heating assembly on the throat pipe is reduced, so that the consumables in the throat pipe cannot be completely melted, after printing is completed, the consumables in the throat pipe can be recycled and reused, and in addition, when the printing of the first heating assembly on the throat pipe is about to be finished, the heat dissipation efficiency of the throat pipe is improved. And the temperature is gradually reduced, certain contribution can be made to heating of the consumables, the situation that the heating efficiency is affected by independently using the second heating assembly on the nozzle is avoided, and the printing efficiency can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing technology, and more specifically, to a nozzle zone heating control method, a related device and a 3D printing head. Background Art

[0002] 3D printing equipment, also known as three-dimensional printing equipment, is a machine that uses rapid prototyping technology. It uses digital model files as the basis, uses molding materials, and constructs three-dimensional entities by printing layer by layer. 3D printing equipment has been widely used in industrial design, architecture, aerospace and other fields.

[0003] In existing 3D printing equipment, the nozzle and throat inside the print head are usually only equipped with a heating component for heating the consumables. When the consumables need to be replaced or printing is about to be completed, the consumables in the throat will completely melt under the influence of the heating component. Therefore, the consumables in the throat cannot be recycled and can only be cut and cleaned. In printing work that requires frequent switching of consumable colors, a lot of consumables will be wasted. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a nozzle zone heating control method, related devices and a 3D printing head to overcome the disadvantage of the prior art that the completely melted consumables in the throat can only be cut off and processed, resulting in waste of consumables.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a nozzle zone heating control method, applied to a 3D printing head, wherein the printing head is provided with a first heating component and a second heating component sequentially distributed along the transmission direction of the printing consumables and used to heat the printing consumables;

[0006] The control method comprises: when a preset condition for terminating printing is met, controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature, wherein the second temperature is lower than the first temperature.

[0007] In one embodiment, the control method further includes: controlling the second heating component to operate at a third temperature; the third temperature is higher than or equal to the first temperature.

[0008] In one embodiment, the preset condition for terminating printing includes: receiving a terminating printing instruction or the current consumable printing progress is greater than or equal to a preset threshold.

[0009] In one embodiment, the print head is also provided with a throat for transmitting printing consumables and a nozzle for controlling the extrusion diameter of the printing consumables; the throat and the nozzle are interconnected; the controlling the temperature of the first heating component to be adjusted from the first temperature to the second temperature specifically includes: controlling the first heating component to be adjusted from the first temperature to the second temperature to heat the printing consumables in the throat; the controlling the second heating component to operate at a third temperature specifically includes: using the second heating component to operate at the third temperature to heat the printing consumables of the nozzle.

[0010] In one embodiment, the second temperature is less than or equal to a no-flow temperature of the printing consumables.

[0011] In one embodiment, the control method further includes: when the 3D printer stops printing, pulling the printing consumables in reverse to extract the printing consumables in a non-flowing state in the throat.

[0012] In one embodiment, it also includes: determining the time length for the first heating component to adjust from the first temperature to the second temperature, and the time length corresponds to the type of printing consumables.

[0013] In one embodiment, controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature specifically includes controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature in a linear or step-wise manner based on the time length.

[0014] In one embodiment, it also includes: determining a first temperature and a second temperature corresponding to the category of printing consumables.

[0015] A nozzle zone heating control device, the nozzle zone heating control device comprising:

[0016] The regulating unit is used to control the temperature of the first heating component to be adjusted from a first temperature to a second temperature lower than the first temperature when a preset condition for terminating printing is met.

[0017] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for controlling nozzle zone heating is implemented as described in any one of the above contents.

[0018] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a nozzle zone heating control method as described in any one of the aforementioned contents is implemented.

[0019] A 3D printing head comprises: a first heating component for heating a printing consumable and a second heating component for heating the printing consumable, wherein the first heating component and the second heating component are sequentially distributed along a transmission direction of the printing consumable.

[0020] In one embodiment, the print head also includes: a throat for transmitting printing consumables and a nozzle for controlling the extrusion diameter of the printing consumables; the throat is connected to the nozzle; the first heating component is thermally transferred to the throat; and the second heating component is thermally transferred to the nozzle.

[0021] In one embodiment, the first heating assembly extends along the axial direction of the throat.

[0022] In one embodiment, the print head further comprises: a first heat dissipation component; the first heat dissipation component is connected to the throat in a heat transfer manner.

[0023] In one embodiment, the first heat dissipation component includes: a first sleeve and a plurality of first heat sinks; the first sleeve is sleeved on the outside of the throat, and the first sleeve is connected to the throat by heat transfer; the plurality of first heat sinks are fixedly connected to the first sleeve; a mounting groove is provided on the first sleeve; the first heating component is embedded in the interior of the limiting groove, and the first heating component is connected to the throat by heat transfer through the first sleeve.

[0024] In one embodiment, it also includes: a second heat dissipation component; the second heat dissipation component is connected to the throat for heat transfer; the second heat dissipation component and the first heat dissipation component are arranged in sequence along the transmission direction of the printing consumables.

[0025] In one embodiment, the second heat dissipation assembly specifically includes: a second heat dissipation block; a material delivery channel is opened inside the second heat dissipation block; and the throat is inserted into the inside of the second heat dissipation block to connect the material delivery channel and the throat.

[0026] In one embodiment, the second heat dissipation component further includes: a heat dissipation fan, and the heat dissipation fan is fixedly connected to the shell wall of the print head.

[0027] In summary, the present invention has the following beneficial effects: a nozzle zone heating control method, applied to a 3D printing head, the printing head is provided with a first heating component and a second heating component distributed in sequence along the transmission direction of the printing consumables and used to heat the printing consumables; the control method comprises: when a preset condition for terminating printing is met, controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature, the second temperature being lower than the first temperature; using the method of the present invention, when the current consumables are about to finish printing, the temperature of the first heating component on the throat is reduced so that the consumables in the throat will not be completely melted, and after the printing is completed, the consumables in the throat can be recycled and reused. In addition, when the first heating component on the throat is about to finish printing, the temperature is gradually reduced, which can also make a certain contribution to the heating of the consumables, avoiding the influence of the heating efficiency by using the second heating component on the nozzle alone, and ensuring the printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a flow chart of a nozzle zone heating control method of the present invention;

[0029] Figure 2 It is a structural diagram of a nozzle zone heating control device in an embodiment of the present invention;

[0030] Figure 3 is an internal structure diagram of a computer device in an embodiment of the present invention;

[0031] Figure 4 is a schematic structural diagram of a 3D printing head in an embodiment of the present invention;

[0032] In the figure, 1, regulating unit; 2, throat; 3, nozzle; 4, first heating component; 5, second heating component; 6, first heat dissipation component; 7, second heat dissipation component; 8, heat dissipation fan. DETAILED DESCRIPTION

[0033] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Several embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0035] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "vertical", "horizontal", "left", "right", "above", "below" and similar expressions are for illustrative purposes only, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] Specifically, in a 3D printer, a heating component is needed to melt the filament, and then extrude it from the corresponding nozzle to complete 3D printing. Since heat transfer takes a certain amount of time, a longer heating area is set on the 3D print head to preheat the filament. Even if the transfer speed of the filament is relatively fast, the filament can be completely melted and smoothly extruded when it reaches the nozzle position. However, the completely melted filament cannot be reused. The unmelted filament can only be cut off and extracted in the throat, and then another type of filament can be used to clean the nozzle and throat to avoid mixing of filaments and affecting the quality of the model. This will result in excessive waste of filaments, including the old filaments that have been cut off and the new filaments used to clean the nozzle and the back tube.

[0037] In order to solve the above problems, the present invention provides a nozzle zone heating control method, such as Figure 1 As shown, a nozzle zone heating control method is applied to a 3D printing head, wherein the printing head is provided with a first heating component and a second heating component sequentially distributed along the transmission direction of the printing consumables and used for heating the printing consumables;

[0038] The control method comprises: when a preset condition for terminating printing is met, controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature, wherein the second temperature is lower than the first temperature.

[0039] The nozzle zone heating control method of the present application is applied to Figure 4 The 3D printing head shown in the figure is provided with a first heating component and a second heating component, wherein the first heating component is located at the upstream position of the consumable transmission, and the second heating component is located at the downstream position of the consumable transmission. During the consumable transmission process, the consumable is first heated by the first heating component and converted into a softened or melted state, and then completely converted into a melted state under the heating action of the second heating component, and extruded from the nozzle of the 3D printing head to realize 3D printing. When the preset conditions for terminating printing are met, it is necessary to control the temperature of the first heating component located upstream, and after the temperature is lowered, the consumable heated by the first heating component is maintained in a semi-molten state. When the type of consumable needs to be replaced, the semi-molten consumable can be extracted, recycled and reused in a semi-molten state or a cooled state, and the consumable heated by the second heating component in the nozzle needs to be cleaned and extruded by subsequent new consumables before printing can continue. In summary, the present application sets two independent heating components on the 3D printing head, adjusts the temperatures of the two heating components respectively according to the control signals provided by the control device, and lowers the temperature of the upstream first heating component when the preset conditions for terminating printing are met. This allows the consumables that have not been completely hot-melted to be recovered, thereby reducing the loss of consumables. In addition, by setting two heating components, the relationship between the hot-melting speed of the consumables and the loss of the consumables can be balanced, thereby improving the printing efficiency of the 3D printer and saving the consumables used by the 3D printer.

[0040] In one embodiment, the control method further includes: controlling the second heating component to operate at a third temperature; the third temperature is higher than or equal to the first temperature.

[0041] In the present application, the second heating component is a heating component located downstream in the transmission direction, which is used to heat the consumable in the nozzle so that the consumable reaches a completely melted state and then is extruded from the nozzle. Therefore, the third temperature needs to be equal to or higher than the normal working temperature of the first heating component to completely melt the consumable.

[0042] In one embodiment, the preset condition for terminating printing includes: receiving a terminating printing instruction or the current consumable printing progress is greater than or equal to a preset threshold.

[0043] In this embodiment, the preset condition for suspending printing specifically refers to the situation where printing needs to be stopped temporarily or for a long time, which mainly includes the following three situations: 1. When the printing progress of the model printing using the current A consumable is about to be completed and the A consumable needs to be replaced with the B consumable, the printing of the A consumable needs to be suspended first, and after replacing with the B consumable, the nozzle needs to be cleaned and the printing can be continued. Therefore, by setting a judgment threshold of the printing progress, for example, if the printing progress of the A consumable has reached 99.5%, the temperature of the first heating component can be reduced to avoid too much A consumable being heated to a molten state, and the consumable in the throat can be heated to a semi-molten state, which can be recycled and reused after cooling, while the consumable in the nozzle is completely molten, and the B consumable needs to be cleaned and removed from the nozzle. 2. When the printing is about to be completed, a judgment threshold of the printing progress can be set, for example, if the current printing progress has reached 99.5%, the temperature of the first heating component can be reduced to avoid too much consumable being heated to a molten state, and the consumable in the throat can be heated to a semi-molten state, which can be recycled and reused after cooling. 3. When people manually send instructions to pause printing and eject filaments, it is necessary to control the 3D print head to stop feeding, and then execute the action according to the subsequent control instructions to eject filaments.

[0044] In one embodiment, the print head is also provided with a throat for transmitting printing consumables and a nozzle for controlling the extrusion diameter of the printing consumables; the throat and the nozzle are interconnected; the controlling the temperature of the first heating component to be adjusted from the first temperature to the second temperature specifically includes: controlling the first heating component to be adjusted from the first temperature to the second temperature to heat the printing consumables in the throat; the controlling the second heating component to operate at a third temperature specifically includes: using the second heating component to operate at the third temperature to heat the printing consumables of the nozzle.

[0045] Specifically, the printing consumables need to pass through the throat during the transmission process. After being heated by the first heating component, the consumables in the throat can be converted into a semi-molten state under the heating action of the first heating component. If it continues to absorb heat, it will quickly convert into a molten state. If it stops absorbing heat, it can cool and harden. The consumables in the semi-molten state are transmitted to the nozzle position and heated by the second heating component. When the second heating component heats the consumables at the third temperature, the consumables can be completely melted and extruded from the nozzle. In such a structure, the consumables in the throat can be recycled, and only the consumables in the nozzle are in a completely melted state and cannot be recycled, which can reduce the loss of consumables.

[0046] In one embodiment, the second temperature is less than or equal to a no-flow temperature of the printing consumables.

[0047] For amorphous materials, there is no fixed melting point and freezing point, so it is necessary to introduce the concept of no-flow temperature for explanation. The no-flow temperature of the material is defined as follows: the highest temperature at which no flow occurs under a certain pressure. The specific measurement method is to add a certain amount of plastic into the barrel at the upper end of the die of the capillary rheometer, heat it to a certain temperature, keep the temperature constant for 10 minutes, and then apply a constant pressure of 50Mpa. If the material does not flow out of the die, increase the temperature of the material by 10 degrees after unloading the pressure, keep the temperature for 10 minutes, and then apply the same constant pressure again, and continue until the melt flows out of the die. Subtract 10 degrees from this temperature to get the no-flow temperature of the material.

[0048] In one embodiment, the control method further includes: when the 3D printer stops printing, pulling the printing consumables in reverse to extract the printing consumables in a non-flowing state in the throat.

[0049] Specifically, after the 3D printer stops printing, the heating temperature of the consumables in the area corresponding to the first heating component in the throat is lower than the heating temperature of the area corresponding to the second heating component. The consumables in a semi-molten state can be pulled out of the throat and solidified under the action of reverse pulling, thereby realizing the recycling of the consumables.

[0050] In one embodiment, it also includes: determining the time length for the first heating component to adjust from the first temperature to the second temperature, and the time length corresponds to the type of printing consumables.

[0051] In this application, the length of time for lowering the temperature can be adjusted as needed. For example, when the temperature changes greatly, the temperature can be lowered slowly over a long period of time in advance; when the temperature changes slightly, the temperature can be lowered quickly when approaching the threshold. The above examples are only to illustrate that the speed of temperature reduction can be adjusted as needed. In addition to the above-listed contents, when the temperature changes slightly, the temperature can also be lowered slowly over a long period of time in advance. There is no necessary connection between the temperature change and the time required to lower the temperature, and they can be combined arbitrarily as needed.

[0052] In one embodiment, controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature specifically includes controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature in a linear or step-wise manner based on the time length.

[0053] In one embodiment, it also includes: determining a first temperature and a second temperature corresponding to the category of printing consumables.

[0054] Specifically, the first temperature, the second temperature, and the third temperature will change accordingly depending on the material of the printing consumables. For example, the hot melt temperature of PLA (polylactic acid) is usually set between 190°C and 220°C; the hot melt temperature of ABS (acrylonitrile-butadiene-styrene) is generally set between 210°C and 250°C; the hot melt temperature of PETG (polyethylene terephthalate-copolymer) is usually set between 220°C and 250°C; the hot melt temperature of high temperature resistant materials (such as PEEK, PI, etc.) can reach above 260°C. Therefore, the material characteristics can be used to determine the most appropriate temperature to heat the material.

[0055] See also Figure 2 , a nozzle zone heating control device, the nozzle zone heating control device comprising:

[0056] The regulating unit 1 is used for controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature lower than the first temperature when a preset condition for terminating printing is met.

[0057] For the specific definition of the nozzle zone heating control device, please refer to the definition of the nozzle zone heating control method above, which will not be repeated here. Each module in the above-mentioned nozzle zone heating control device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0058] Those skilled in the art will understand that Figure 2 The structure shown in the figure is only a block diagram of a part of the structure related to the present application scheme, and does not constitute a limitation of the present application scheme. The specific nozzle zone heating control device may include more or less components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0059] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the nozzle zone heating control method described in the above embodiment is implemented.

[0060] A computer device, which may be a server, may have an internal structure as shown in Figure 3As shown. The computer device includes a processor, a memory, a network interface and a database connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. When the computer program is executed by the processor, a nozzle zone heating control method is implemented.

[0061] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0062] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the following steps when executing the computer program: applied to a 3D printing head, the printing head is provided with a first heating component and a second heating component distributed in sequence along the transmission direction of the printing consumables and used to heat the printing consumables; the control method includes: when a preset condition for terminating printing is met, controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature, and the second temperature is lower than the first temperature.

[0063] In one embodiment, the control method further includes: controlling the second heating component to operate at a third temperature; the third temperature is higher than or equal to the first temperature.

[0064] In one embodiment, the preset condition for terminating printing includes: receiving a terminating printing instruction or the current consumable printing progress is greater than or equal to a preset threshold.

[0065] In one embodiment, the print head is also provided with a throat for transmitting printing consumables and a nozzle for controlling the extrusion diameter of the printing consumables; the throat and the nozzle are interconnected; the controlling the temperature of the first heating component to be adjusted from the first temperature to the second temperature specifically includes: controlling the first heating component to be adjusted from the first temperature to the second temperature to heat the printing consumables in the throat; the controlling the second heating component to operate at a third temperature specifically includes: using the second heating component to operate at the third temperature to heat the printing consumables of the nozzle.

[0066] In one embodiment, the second temperature is less than or equal to a no-flow temperature of the printing consumables.

[0067] In one embodiment, the control method further includes: when the 3D printer stops printing, pulling the printing consumables in reverse to extract the printing consumables in a non-flowing state in the throat.

[0068] In one embodiment, the control method further includes: determining a time length for the first heating component to be adjusted from a first temperature to a second temperature, wherein the time length corresponds to a type of the printing consumables.

[0069] In one embodiment, controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature specifically includes controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature in a linear or step-wise manner based on the time length.

[0070] In one embodiment, the control method further includes: determining a first temperature and a second temperature corresponding to the type of printing consumables.

[0071] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0072] A 3D printing head comprises: a first heating component 4 for heating a printing consumable and a second heating component 5 for heating the printing consumable, wherein the first heating component 4 and the second heating component 5 are sequentially distributed along a transmission direction of the printing consumable.

[0073] In actual use, the first heating component 4 and the second heating component 5 heat the consumables together. When the current printing stage is about to end and the predetermined printing conditions are met, the temperature of the first heating component 4 is reduced so that the consumables heated by the first heating component 4 are in a semi-molten state without affecting the properties and shape of the consumables. When the consumables are in a semi-molten state or after cooling, they can be recycled.

[0074] In the present embodiment, the first heating assembly 4 and the second heating assembly 5 are both implemented by PTC heating sheets, which refers to a technology that utilizes the characteristics of PTC (Positive Temperature Coefficient) thermistors for heating. PTC is a special semiconductor material whose resistance value increases with the increase of temperature, i.e., it has a positive temperature coefficient characteristic. When current passes through the PTC resistor, the resistor body generates heat and heats up rapidly. As the temperature increases, the resistance value of the PTC resistor increases, thereby reducing the current consumed and the heat generated. This automatic adjustment and current limiting feature enables the PTC heating system to automatically cut off the power after the temperature reaches the set value, thereby playing a safety protection role.

[0075] In this embodiment, it is known to those skilled in the art that, in addition to the first heating component 4 and the second heating component 5, a control component for controlling the first heating component 4 and the second heating component 5, and a power supply component for providing electrical energy are also required. The control component and the power supply component are electrically connected to the two heating components to provide control signals and electrical signals. The control component can realize this function using a single-chip microcomputer, or it can be realized using an MCU. By sending instructions according to a predetermined program, the temperature of the heating component can be controlled. The power supply component can use a DC power supply component or an AC power supply component. This belongs to the technology that should be known to those skilled in the art, so it will not be repeated in this application.

[0076] In one embodiment, the print head also includes: a throat 2 for transmitting printing consumables and a nozzle 3 for controlling the extrusion diameter of the printing consumables; the throat 2 is connected to the nozzle 3; the first heating component 4 is thermally transferred to the throat 2; and the second heating component 5 is thermally transferred to the nozzle 3.

[0077] Specifically, the volume of the nozzle 3 is relatively small. After the consumables are heated and melted, not too much consumables are needed to fill the internal space of the nozzle 3. The throat 2 is usually relatively long. Therefore, if all the consumables in the throat 2 are hot-melted, the consumables in the throat 2 can only be completely cleaned up after being cleaned with replacement materials. In this application, the second heating component 5 is used to heat the consumables in the throat 2, and the temperature of the second heating component 5 is adjusted as needed to make the consumables in the throat 2 in a semi-molten state. In this way, after the heating is stopped, the semi-molten or cooled consumables can be drawn out of the throat 2 to complete the recycling of the consumables.

[0078] In one embodiment, the first heating component 4 extends along the axial direction of the throat 2. The first heating component 4 extends along the axial direction of the throat 2, and can heat the consumables as early as possible, so that even if the consumables are transmitted at a fast speed, it is enough for the consumables to fully absorb heat and soften.

[0079] In one embodiment, the print head further comprises: a first heat dissipation component 6 ; the first heat dissipation component 6 is connected to the throat 2 in a heat transfer manner.

[0080] In order to speed up the cooling rate of the throat 2, the present application sets a first heat dissipation component 6 on the throat 2. The first heat dissipation component 6 is connected to the throat 2 by heat transfer, which can quickly reduce the heat of the throat 2 and avoid excessive heating of the consumables caused by residual heat in the throat 2.

[0081] In one embodiment, the first heat dissipation component 6 includes: a first sleeve and a plurality of first heat sinks; the first sleeve is sleeved on the outside of the throat 2, and the first sleeve is connected to the throat 2 for heat transfer; the plurality of first heat sinks are fixedly connected to the first sleeve; a mounting groove is provided on the first sleeve; the first heating component 4 is embedded in the inside of the limiting groove, and the first heating component 4 is connected to the throat 2 for heat transfer through the first sleeve.

[0082] In one embodiment, it further includes: a second heat dissipation component 7; the second heat dissipation component 7 is connected to the throat 2 by heat transfer; the second heat dissipation component 7 and the first heat dissipation component 6 are arranged in sequence along the transmission direction of the printing consumables.

[0083] The second heat dissipation component 7 is used to cool the throat pipe 2 to prevent the heat of the throat pipe 2 and consumables from transferring upward to affect subsequent consumables.

[0084] In one embodiment, the second heat dissipation assembly 7 specifically includes: a second heat dissipation block; a material delivery channel is opened inside the second heat dissipation block; the throat 2 is inserted into the inside of the second heat dissipation block to connect the material delivery channel and the throat 2.

[0085] In one embodiment, the second heat dissipation assembly 7 further includes: a heat dissipation fan 8 for blowing air to the second heat sink to accelerate heat transfer, and the heat dissipation fan 8 is fixedly connected to the shell wall of the print head.

[0086] In order to accelerate the heat dissipation effect of the second heat dissipation component 7 and prevent the second heat dissipation component 7 from being overheated after long-term printing, the present application further provides a heat dissipation fan 8 on the 3D printing head, and the output end of the heat dissipation fan 8 faces the second heat dissipation component 7 to accelerate the air flow and reduce the temperature of the second heat dissipation component 7. The heat dissipation fan 8 is also electrically connected to the control component and the power supply component, and can be selected to rotate or not rotate under the control signal of the control component.

[0087] Embodiment 1, a zoned heating control method is applied to a 3D print head, wherein the print head is provided with a first heating component and a second heating component distributed in sequence along the transmission direction of the printing consumables and used to heat the printing consumables; the control method comprises: when a preset condition for terminating printing is met, controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature, the second temperature being lower than the first temperature.

[0088] Example 2, based on Example 1, the zone heating control method also includes: controlling the second heating component to operate at a third temperature; the third temperature is higher than or equal to the first temperature.

[0089] Embodiment 3, based on embodiment 1, the preset condition for terminating printing includes: receiving a terminating printing instruction or the current consumable printing progress is greater than or equal to a preset threshold.

[0090] Embodiment 4, based on Embodiment 2, is characterized in that a throat for transmitting printing consumables and a nozzle for controlling the extrusion diameter of the printing consumables are also provided on the print head; the throat and the nozzle are interconnected; the temperature of the first heating component is controlled to be adjusted from the first temperature to the second temperature, specifically including: controlling the first heating component to be adjusted from the first temperature to the second temperature to heat the printing consumables in the throat; the second heating component is controlled to operate at a third temperature, specifically including: using the second heating component to operate at the third temperature to heat the printing consumables of the nozzle.

[0091] Embodiment 5, based on embodiment 1, the second temperature is less than or equal to the non-flow temperature of the printing consumables.

[0092] Embodiment 6, based on embodiment 5, the control method further includes:

[0093] When the 3D printer stops printing, the printing consumables are pulled in the reverse direction to extract the printing consumables in the throat that are in a non-flowing state.

[0094] Embodiment 7, based on Embodiment 1, further includes: determining the time length for the first heating component to adjust from the first temperature to the second temperature, wherein the time length corresponds to the type of printing consumables.

[0095] Embodiment 8, based on Embodiment 7, the controlling the temperature of the first heating component to be adjusted from the first temperature to the second temperature specifically includes, based on the time length, controlling the temperature of the first heating component to be adjusted from the first temperature to the second temperature in a linear or step-wise manner. Embodiment 9, based on Embodiment 1, further includes: determining the first temperature and the second temperature corresponding to the type of printing consumables.

[0096] Embodiment 10 is a nozzle zone heating control device, the nozzle zone heating control device comprising: an adjustment unit, used for controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature lower than the first temperature when a preset condition for terminating printing is met.

[0097] Embodiment 11, a computer-readable storage medium, having a computer program stored thereon, wherein when the computer program is executed by a processor, a nozzle zone heating control method as described in any one of embodiments 1-9 is implemented.

[0098] Embodiment 12, a computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a nozzle zone heating control method as described in any one of embodiments 1-9 is implemented.

[0099] Embodiment 13, a 3D printing head, comprising: a first heating component for heating a printing consumable and a second heating component for heating the printing consumable, wherein the first heating component and the second heating component are sequentially distributed along a transmission direction of the printing consumable.

[0100] Example 14, based on Example 13, the print head also includes: a throat for transmitting printing consumables and a nozzle for controlling the extrusion diameter of the printing consumables; the throat is connected to the nozzle; the first heating component is connected to the throat by heat transfer; the second heating component is connected to the nozzle by heat transfer.

[0101] Embodiment 15, based on Embodiment 14, the first heating component extends along the axial direction of the throat.

[0102] Embodiment 16, based on embodiment 15, the print head further includes: a first heat dissipation component; the first heat dissipation component is connected to the throat for heat transfer.

[0103] Embodiment 17, on the basis of Embodiment 16, the first heat dissipation component includes: a first sleeve and a plurality of first heat sinks; the first sleeve is sleeved on the outside of the throat, and the first sleeve is connected to the throat by heat transfer; the plurality of first heat sinks are fixedly connected to the first sleeve; a mounting groove is provided on the first sleeve; the first heating component is embedded in the interior of the limiting groove, and the first heating component is connected to the throat by heat transfer through the first sleeve.

[0104] Example 18, based on Example 17, further includes: a second heat dissipation component; the second heat dissipation component is connected to the throat for heat transfer; the second heat dissipation component and the first heat dissipation component are arranged in sequence along the transmission direction of the printing consumables.

[0105] Embodiment 19, based on Embodiment 18, the second heat dissipation assembly specifically includes: a second heat dissipation block; a material delivery channel is opened inside the second heat dissipation block; the throat is inserted into the interior of the second heat dissipation block to connect the material delivery channel and the throat.

[0106] Embodiment 20, based on embodiment 19, the second heat dissipation component further includes: a heat dissipation fan, and the heat dissipation fan is fixedly connected to the shell wall of the print head.

[0107] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A zone heating control method, characterized in that: Applied to a 3D printing head, the printing head is provided with a first heating component and a second heating component sequentially distributed along the transmission direction of the printing consumables and used for heating the printing consumables; The control method comprises: When a preset condition for terminating printing is met, the temperature of the first heating component is controlled to be adjusted from a first temperature to a second temperature, where the second temperature is lower than the first temperature.

2. A nozzle zone heating control method according to claim 1, characterized in that: Also includes: controlling the second heating component to operate at a third temperature; The third temperature is higher than or equal to the first temperature; The preset conditions for terminating printing include: receiving a terminating printing instruction or the current consumable printing progress is greater than or equal to a preset threshold; the print head is also provided with a throat for transmitting printing consumables and a nozzle for controlling the extrusion diameter of the printing consumables; the throat and the nozzle are connected to each other; The step of controlling the temperature of the first heating component to be adjusted from a first temperature to a second temperature specifically includes: Controlling the first heating component to adjust from a first temperature to a second temperature to heat the printing consumables in the throat; The controlling the second heating component to operate at a third temperature specifically includes: The second heating component is used to operate at a third temperature to heat the printing consumables of the nozzle.

3. A nozzle zone heating control method according to claim 1, characterized in that: The second temperature is less than / equal to the non-flow temperature of the printing consumables; the control method further includes: When the 3D printer stops printing, the printing consumables are pulled in reverse to extract the printing consumables in the throat that are in a non-flowing state; further comprising: Determine the time length for the first heating component to be adjusted from the first temperature to the second temperature, wherein the time length corresponds to the category of the printing consumables; and control the temperature of the first heating component to be adjusted from the first temperature to the second temperature, specifically including, based on the time length, controlling the temperature of the first heating component to be adjusted from the first temperature to the second temperature in a linear or step-wise manner.

4. A nozzle zone heating control method according to claim 1, characterized in that: ; Also includes: determining a first temperature and a second temperature corresponding to the category of printing consumables.

5. A nozzle zone heating control device, characterized in that: The nozzle zone heating control device comprises: The regulating unit is used to control the temperature of the first heating component to be adjusted from a first temperature to a second temperature lower than the first temperature when a preset condition for terminating printing is met.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, a nozzle zone heating control method as described in any one of claims 1 to 4 is implemented.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, a nozzle zone heating control method as described in any one of claims 1-4 is implemented.

8. A 3D printing head, characterized in that: include: A first heating component for heating the printing consumables and a second heating component for heating the printing consumables, wherein the first heating component and the second heating component are sequentially distributed along the transmission direction of the printing consumables.

9. A 3D printing head according to claim 8, characterized in that: The print head further comprises: a throat for transmitting printing consumables and a nozzle for controlling the extrusion diameter of the printing consumables; The throat is connected to the nozzle; The first heating assembly is connected to the throat by heat transfer; the second heating assembly is connected to the nozzle by heat transfer; the first heating assembly extends along the axial direction of the throat; the print head further comprises: a first heat dissipation assembly; the first heat dissipation assembly is connected to the throat by heat transfer; the first heat dissipation assembly comprises: a first sleeve and a plurality of first heat sinks; the first sleeve is sleeved on the outside of the throat, the first sleeve is connected to the throat by heat transfer; the plurality of first heat sinks are fixedly connected to the first sleeve; The first sleeve is provided with an installation groove; the first heating component is embedded in the interior of the limiting groove, and the first heating component is connected to the throat through the first sleeve; it also includes: a second heat dissipation component; the second heat dissipation component is connected to the throat through heat transfer; the second heat dissipation component and the first heat dissipation component are arranged in sequence along the transmission direction of the printing consumables; the second heat dissipation component specifically includes: a second heat dissipation block; a material delivery channel is provided in the interior of the second heat dissipation block; the throat is inserted into the interior of the second heat dissipation block to connect the material delivery channel and the throat.

10. A 3D printing head according to claim 9, characterized in that: The second heat dissipation component further includes: a heat dissipation fan, and the heat dissipation fan is fixedly connected to the shell wall of the print head.

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