A 3D printing device with automatic demoulding function

Abstract

The present invention relates to the technical field of 3D printing equipment, and in particular to a 3D printing equipment with an automatic demoulding function. It includes a workbench, the upper side of the workbench is fixedly connected with a mirror-distributed slide rail, the upper side of the mirror-distributed slide rail is slidably connected with an inverted U-shaped frame, the inverted U-shaped frame is slidably connected with a first sliding frame, the first sliding frame is slidably connected with a sliding member, the lower side of the sliding member is fixedly connected with a throat, the lower side of the throat is provided with a heating element, the lower side of the heating element is fixedly connected and connected with a material storage shell, the material storage shell is provided with a material guide channel, one side of the material storage shell is fixedly connected and connected with an exhaust pipe, the lower side of the material storage shell is fixedly connected with a nozzle, and the sliding member, the throat and the heating element are all matched with consumables. The present invention pre-treats the consumables before spraying, removes the bubbles in the consumables by negative pressure extraction, and avoids the bubbles in the consumables affecting the appearance of the model when the consumables are sprayed.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing equipment, and in particular to a 3D printing equipment with an automatic demoulding function. Background Art

[0002] 3D printing, full name three-dimensional printing, is a technology that uses digital model files as the basis, uses powdered metal or plastic and other bonded materials to construct objects by printing layer by layer. This process is also called additive manufacturing. In contrast to traditional subtractive manufacturing (such as cutting and engraving), 3D printing creates physical objects by stacking layers of materials.

[0003] The specific working principle of 3D printing equipment is: solid consumables are heated at high temperature to melt the solid consumables and extrude the molten consumables through the nozzle so that the consumables are squeezed into a shape that meets the requirements of the work, and stacked layer by layer until the required model is manufactured. However, some consumables made of special materials, such as polylactic acid, are easy to absorb moisture in the air when stored in an open environment for too long. The absorbed moisture will be converted into steam during the heating process to form bubbles. When the consumables containing bubbles are extruded, holes or depressions will be formed in the printing layer, affecting the surface smoothness and structural strength of the model, making the model look poor and even limiting its functions. Summary of the invention

[0004] In order to solve the problem that the consumables used in the existing 3D printing equipment absorb moisture from the surrounding environment due to long storage time, the absorbed moisture will be converted into steam during the heating process, and then form bubbles, and the consumables containing bubbles will be squeezed out, resulting in poor model appearance and even limited functions, the present invention provides a 3D printing device with automatic demolding function.

[0005] The technical solution of the present invention is: a 3D printing device with automatic demoulding function, comprising a workbench, a mirror-distributed slide rail is fixedly connected to the upper side of the workbench, and the upper sides of the mirror-distributed slide rails are slidably connected to an inverted U-shaped frame, the inverted U-shaped frame is slidably connected to a first sliding frame, the first sliding frame is slidably connected to a sliding member, the lower side of the sliding member is fixedly connected to a throat, the lower side of the throat is provided with a heating member, the lower side of the heating member is fixedly connected to and connected with a material storage shell, the lower side of the material storage shell is provided with a material guiding channel connected thereto, one side of the material storage shell is fixedly connected to and connected with an exhaust pipe, the lower side of the material storage shell is fixedly connected to a nozzle, the sliding member, the throat and the heating member are all coordinated with consumables, and a demoulding component for processing the model is provided on the workbench.

[0006] Furthermore, the demoulding assembly includes a second sliding frame, which is slidably connected between the mirror-distributed slide rails, and the second sliding frame is fixedly connected to a first extrusion block, which is slidably matched with the upper side of the workbench.

[0007] Furthermore, a blocking piece is rotatably connected to the upper side of the material storage shell, and the blocking piece is used to block the communication position between the air extraction pipe and the material storage shell. The blocking piece is fixedly connected to connecting rods distributed in an annular array, and the opposite sides of the connecting rods distributed in an annular array are commonly fixedly connected to a rotating piece that rotates with the material storage shell. The rotating piece is composed of a rotating drum and spiral blades fixed to each other. The material guide channel is truncated cone-shaped, and the spiral blades on the rotating piece are located in the material guide channel and fit with the material storage shell. The lower side of the heating element is fixedly connected to a first fixed shell and a second fixed shell.

[0008] Furthermore, an L-shaped frame is fixedly connected to one side of the heating element, and the L-shaped frame is provided with a motor. The output shaft of the motor passes through the storage shell and the second fixed shell and rotates with the two. The outer side of the first fixed shell is rotatably connected to a first gear that is fixed to the upper side of the connecting rods distributed in a ring array, and the output shaft of the motor is key-connected to a second gear that meshes with the first gear.

[0009] Furthermore, a sliding shell is slidably connected inside the material storage shell, and a feed port distributed in a circular array is arranged on the lower side of the sliding shell. The material storage shell and the feed port distributed in a circular array on the sliding shell are both sealed and matched, a tension spring is fixedly connected between the sliding shell and the material storage shell, a fixed block is fixedly connected to the inner side of the sliding shell, and a second extrusion block extruded and matched with the fixed block is fixedly connected to the upper side of the rotating member.

[0010] Furthermore, the rotating member is provided with an air guide channel connected with the material storage shell, the rotating member is provided with a pressure relief valve located in the air guide channel, the rotating member is provided with a plurality of L-shaped air guide cavities, the facing sides of the plurality of L-shaped air guide cavities are connected with the air guide channel, and the lower sides of the plurality of L-shaped air guide cavities are facing the lower side of the material guide channel.

[0011] Furthermore, an air receiving shell is fixedly connected to one side of the material storage shell close to the air exhaust pipe, the air receiving shell is fixedly connected to and communicated with the air exhaust pipe, an extrusion plate is slidably connected inside the air receiving shell, a spring is fixedly connected between the extrusion plate and the air receiving shell, and a connecting hole is provided on the lower side of the air receiving shell.

[0012] Further, it further includes a fan, the fan is fixedly connected to one side of the heating element close to the air extraction pipe, the heating element is fixedly connected with a gas guiding member, one side of the gas guiding member facing away from the fan is fixedly connected and communicated with a gas guiding pipe, the middle of the gas guiding pipe is communicated with the inside of the material storage shell, and the blocking member is used to block the communication position between the gas guiding pipe and the material storage shell.

[0013] Further, the throat pipe is arranged in a corrugated shape, a liquid storage shell is fixedly connected to the outside of the throat pipe, water is stored in the liquid storage shell, fixing rings that are fixedly connected in a linear array and are all fixedly connected to the throat pipe are arranged in the liquid storage shell, and a plurality of groups of through holes distributed in an annular array are arranged on the fixing rings.

[0014] Further, the cross section of the liquid storage shell is in the shape of "丰" (Feng), and the outside of the "丰" shape slopes upward.

[0015] Compared with the prior art, the present invention has the following advantages: the present invention pre-treats the consumables before spraying, removes the bubbles in the consumables by means of negative pressure extraction, and avoids the bubbles in the consumables affecting the appearance of the model when the consumables are sprayed;

[0016] When the printing of the model is completed, through the contact between the first extrusion block and the model, automatic demolding of the model is realized, and during the process of removing the bubbles in the molten consumables;

[0017] During the process of printing the model, the gas in the material storage shell is extracted through the air extraction pipe, so that a negative pressure environment is presented in the material storage shell. When the bubbles in the molten consumables float upward to its upper surface, the bubbles in the molten consumables burst and then are released into the material storage shell. Under the action of the air extraction of the air extraction pipe, the above-mentioned gas is extracted, so as to complete the removal of the bubbles in the molten consumables. After the blocking member blocks the communication position between the air extraction pipe and the material storage shell, the pressure in the air extraction pipe gradually decreases under the action of the external air extraction device, so that the extrusion plate overcomes the supporting force provided by the adjacent springs and moves upward, and the environment in the air extraction pipe is kept stable;

[0018] The present invention cools the throat pipe by means of physical cooling. When the fan is damaged, the throat pipe can still be cooled. Description of the Drawings

[0019] Figure 1 It is the front view of the three-dimensional structure of the present invention;

[0020] Figure 2 It is the rear view of the three-dimensional structure of the present invention;

[0021] Figure 3 It is the front view of the three-dimensional structure of the first sliding frame of the present invention;

[0022] Figure 4It is a rear view of the three-dimensional structure of the heating element of the present invention;

[0023] Figure 5 It is a three-dimensional structural cross-sectional view of the material storage shell of the present invention;

[0024] Figure 6 It is a three-dimensional structural cross-sectional view of the air extraction pipe of the present invention;

[0025] Figure 7 It is a three-dimensional structural cross-sectional view of the gas container of the present invention;

[0026] Figure 8 It is a three-dimensional structural cross-sectional view of the blocking member of the present invention;

[0027] Fig. 9 It is a three-dimensional structural cross-sectional view of the liquid containing shell of the present invention.

[0028] The accompanying drawings are marked as follows: 10, workbench, 11, slide rail, 12, inverted U-shaped frame, 14, first sliding frame, 15, sliding member, 16, throat, 17, heating member, 18, storage shell, 181, material guide channel, 182, exhaust pipe, 19, nozzle, 1, consumables, 20, second sliding frame, 21, first extrusion block, 30, blocking member, 31, connecting rod, 32, rotating member, 33, first fixed shell, 34, second fixed shell, 40, L-shaped frame, 41, motor, 42, first gear, 43, second gear, 50, sliding shell, 51, fixed block, 52, second extrusion block, 60, air guide channel, 61, L-shaped air guide cavity, 70, air holding shell, 71, extrusion plate, 80, fan, 81, air guide member, 82, air guide pipe, 90, liquid holding shell, 91, fixing ring. DETAILED DESCRIPTION

[0029] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0030] In order to solve the problem that the consumables used in existing 3D printing equipment absorb moisture from the surrounding environment due to long storage time, the absorbed moisture will be converted into steam during the heating process, and then form bubbles, and the consumables containing bubbles will be squeezed out, resulting in poor model appearance and even limited functions, the present invention pre-treats the consumables before spraying, removes the bubbles in the consumables by negative pressure extraction, and avoids the bubbles in the consumables affecting the appearance of the model when the consumables are sprayed.

[0031] Embodiment 1: A 3D printing device with automatic demoulding function, such as Figure 1-Figure 6 As shown, a workbench 10 is included, two slide rails 11 distributed in a left and right mirror image are fixedly connected to the upper side of the workbench 10, an inverted U-shaped frame 12 is slidably connected to the upper sides of the two slide rails 11 distributed in a left and right mirror image, the inverted U-shaped frame 12 is slidably connected to the first slide frame 14, the first slide frame 14 is slidably connected to the sliding member 15, a throat 16 (also called a thermistor tube) is fixedly connected to the lower side of the sliding member 15, a heating element 17 is arranged on the lower side of the throat 16, the heating element 17 is used to heat the consumables 1, the throat 16 is used to transport the consumables 1, the lower side of the heating element 17 is fixedly connected and connected to a material storage shell 18, a material guide channel 181 connected thereto is arranged on the lower side of the material storage shell 18, and the left side of the material storage shell 18 is fixedly connected to the It is also connected with an exhaust pipe 182. A nozzle 19 is fixedly connected to the lower side of the storage shell 18. The nozzle 19 is used to transport the molten consumable 1. The sliding member 15, the throat 16 and the heating member 17 are all matched with the consumable 1. The gas in the storage shell 18 is extracted through the exhaust pipe 182. A negative pressure environment is present in the storage shell 18. Under the action of the negative pressure environment in the storage shell 18, when the bubbles in the molten consumable 1 are exposed to its upper surface, the bubbles in the molten consumable 1 are broken and then released into the storage shell 18. Under the action of the exhaust pipe 182, the above-mentioned gas is extracted to complete the removal of the bubbles in the molten consumable 1. A demolding component for processing the model is provided on the workbench 10.

[0032] like Figure 1 and Figure 2 As shown, the demoulding assembly includes a second sliding frame 20, which is slidably connected between two slide rails 11 distributed in left and right mirror images. A first extrusion block 21 is fixedly connected to the front side of the second sliding frame 20. The first extrusion block 21 is slidably matched with the upper side surface of the workbench 10. An inclined surface is provided on the front side of the first extrusion block 21. When the first extrusion block 21 moves forward, the model on the upper side of the workbench 10 is removed by the inclined surface of the first extrusion block 21, thereby realizing automatic demoulding of the model.

[0033] like Figure 5-Figure 8As shown, the upper side of the storage shell 18 is rotatably connected with a blocking member 30, which is composed of an arc-shaped baffle and a circular ring fixed to each other. The blocking member 30 is used to block the communication position between the exhaust pipe 182 and the storage shell 18. When the blocking member 30 blocks the communication position between the exhaust pipe 182 and the storage shell 18, the exhaust pipe 182 no longer extracts gas from the storage shell 18. The lower side of the blocking member 30 is fixedly connected to two connecting rods 31 distributed in an annular array, and the opposite sides of the two connecting rods 31 distributed in the annular array are commonly fixedly connected with a rotating member 32. The rotating member 32 is rotatably matched with the storage shell 18, and the rotating member 32 is composed of a rotating drum and spiral blades fixed to each other. The material channel 181 is truncated cone-shaped, and the diameter of the upper side of the truncated cone is larger than the diameter of the lower side. The spiral blades on the rotating member 32 are located in the material guide channel 181 and fit with the material storage shell 18. The spiral blades on the rotating member 32 fit with the material guide channel 181. The lower side of the heating member 17 is fixed with a first fixed shell 33 and a second fixed shell 34. The diameter of the first fixed shell 33 is smaller than the diameter of the second fixed shell 34. The first fixed shell 33 is located in the second fixed shell 34. Under the action of the rotation of the spiral blades on the rotating member 32 and the truncated cone-shaped material guide channel 181, the molten consumable 1 quickly flows from the upper side of the material guide channel 181 to the lower side of the material guide channel 181.

[0034] like Figure 4 and Figure 6-Figure 8 As shown, an L-shaped frame 40 is fixedly connected to the rear side of the heating element 17, and the L-shaped frame 40 is provided with a motor 41. The output shaft of the motor 41 passes through the storage shell 18 and the second fixed shell 34 and is sealed and rotated with the two. The outer side of the first fixed shell 33 is rotationally connected with a first gear 42 fixed to the upper side of the two connecting rods 31 distributed in an annular array. The output shaft of the motor 41 is keyed to a second gear 43 meshing with the first gear 42. The first gear 42 and the second gear 43 are both bevel gears. Through the meshing of the second gear 43 with the first gear 42, the two connecting rods 31 distributed in the annular array can drive the sealing member 30 to rotate.

[0035] like Figure 6 and Figure 7As shown, a sliding shell 50 is slidingly connected with a limited seal in the material storage shell 18, and a feeding port distributed in a ring array is arranged on the lower side of the sliding shell 50. The material storage shell 18 and the feeding port distributed in the ring array on the sliding shell 50 are both blocked and matched. A tension spring is fixedly connected between the sliding shell 50 and the material storage shell 18, and this tension spring is used to drive the sliding shell 50 to reset and move. When the feeding port distributed in the ring array on the sliding shell 50 is blocked by the material storage shell 18, the consumables in the molten state in the material storage shell 18 will not enter the material guiding channel 181, and a fixed block 51 is fixedly connected to the inner side of the sliding shell 50, and an inclined surface is arranged on the lower side of the fixed block 51. A second extrusion block 52 is fixedly connected to the upper side of the rotating member 32, and an inclined surface is arranged on the upper side of the second extrusion block 52. The inclined surface of the second extrusion block 52 is extruded and matched with the inclined surface of the fixed block 51, and the upper side of the sliding shell 50 is not sealed with the rotating member 32.

[0036] like Figure 8 As shown, the rotating member 32 is provided with an air guide channel 60 connected with the material storage shell 18, the rotating member 32 is provided with a pressure relief valve located in the air guide channel 60, and the rotating member 32 is provided with a plurality of L-shaped air guide cavities 61, and the opposite sides of the plurality of L-shaped air guide cavities 61 are connected with the air guide channel 60, and the lower sides of the plurality of L-shaped air guide cavities 61 are all facing the lower side of the material guide channel 181. During the rotation of the rotating member 32, the surrounding consumables 1 in a molten state are squeezed, so that the residual bubbles in the molten consumables 1 are burst by the pressure mentioned above, and then enter the air guide channel 60 from the adjacent L-shaped air guide cavity 61. When the pressure in the air guide channel 60 exceeds the threshold of the pressure relief valve therein, the gas in the air guide channel 60 and the consumables 1 in a molten state flow out from the upper side of the air guide channel 60, thereby completing the gas transfer.

[0037] like Figure 3 and Figure 5-Figure 7 As shown, the left side of the material storage shell 18 is fixedly connected to an air receiving shell 70 which is fixedly connected to and communicated with the exhaust pipe 182. The air receiving shell 70 is internally connected to an extrusion plate 71 which is slidably connected to the limit seal. A spring is fixedly connected between the extrusion plate 71 and the air receiving shell 70, and the spring is used to drive the extrusion plate 71 to reset and move. A connecting hole is provided on the lower side of the air receiving shell 70. When the extrusion plate 71 moves upward, it stabilizes the environment in the exhaust pipe 182. When the extrusion plate 71 moves downward, the material storage shell 18 quickly becomes a negative pressure environment, thereby shortening the time for removing bubbles from the molten consumables 1 in the material storage shell 18.

[0038] Before using the device to print a model, the staff connects the exhaust port of the external exhaust device to the left side of the exhaust pipe 182, and then connects the external power device between the slide rail 11 and the inverted U-shaped frame 12, between the slide rail 11 and the second sliding frame 20, between the first sliding frame 14 and the inverted U-shaped frame 12, and between the sliding member 15 and the first sliding frame 14, thereby completing the preparation actions before model printing.

[0039] After completing the preparation work before model printing, the sliding member 15 intermittently delivers the consumable 1 to the heating member 17 through the throat 16, and the heating member 17 heats the consumable 1 so that the consumable 1 falls into the storage shell 18 in a molten state. During this process, the staff starts the motor 41 and the external exhaust device of the exhaust pipe 182, and the motor 41 transmits power to the second gear 43, so that the second gear 43 drives the first gear 42 to rotate, and the first gear 42 drives the sealing member 30, the rotating member 32, and the second extrusion block 52 to rotate through all the connecting rods 31.

[0040] After the molten consumable 1 falls into the storage shell 18, the rotating member 32, the second extruding block 52 and the blocking member 30 rotate to the position where the blocking member 30 no longer blocks the connection between the exhaust pipe 182 and the storage shell 18 (the above parts rotate clockwise), and the second extruding block 52 no longer contacts the fixed block 51, and then the gas in the exhaust pipe 182 and the storage shell 18 is extracted through the exhaust device external to the exhaust pipe 182, so that the storage shell 18 presents a negative pressure environment, and under the action of the negative pressure environment in the storage shell 18, the bubbles in the molten consumable 1 move upward (because the gas is easier to flow than the molten consumable 1, the bubbles in the molten consumable 1 will move toward the exhaust pipe 182), so that when the bubbles in the molten consumable 1 are exposed to its upper surface, the bubbles in the molten consumable 1 burst and are then released into the storage shell 18, and under the action of the exhaust pipe 182, the above-mentioned gas is extracted, thereby completing the removal of the bubbles in the molten consumable 1.

[0041] After the bubbles in the molten consumable 1 are removed, the rotating member 32, the second extruding block 52 and the blocking member 30 rotate to the position where the blocking member 30 blocks the connection between the exhaust pipe 182 and the storage shell 18, and the second extruding block 52 contacts the fixed block 51 and squeezes the fixed block 51 upward, and the fixed block 51 drives the sliding shell 50 to move upward (the adjacent tension spring is stretched during the movement of the sliding shell 50). After the sliding shell 50 moves upward until all the feed ports on it are exposed to the storage shell 18, the molten consumable 1 in the storage shell 18 enters the material guide channel 181 from all the feed ports on the sliding shell 50. Under the action of the rotation of the spiral blades on the rotating member 32 and the truncated cone shape of the material guide channel 181, the molten consumable 1 quickly flows from the upper side of the material guide channel 181 to the lower side of the material guide channel 181, and then is sprayed out by the nozzle 19. Through the above steps, the bubbles in the molten consumable 1 are removed.

[0042] After the blocking member 30 blocks the connection position between the exhaust pipe 182 and the material storage shell 18, the pressure in the exhaust pipe 182 gradually decreases under the action of the external exhaust device, so that the extrusion plate 71 overcomes the supporting force provided by the adjacent spring to move upward and keep the environment in the exhaust pipe 182 stable.

[0043] After the molten consumable 1 is ejected from the nozzle 19, the inverted U-shaped frame 12, the second sliding frame 20, the first sliding frame 14 and the sliding member 15 are driven to move by the above-mentioned power equipment respectively, so as to complete the printing of the model. The movement of the above-mentioned parts is carried out according to the structural characteristics of the model, and the movement method is the same as the existing one.

[0044] During the process of printing the model, the rotating member 32, the second extrusion block 52 and the blocking member 30 rotate to the position where the blocking member 30 no longer blocks the connection between the exhaust pipe 182 and the material storage shell 18, and the second extrusion block 52 no longer contacts the fixed block 51. The sliding shell 50 moves downward and resets under the action of the adjacent tension spring, so that the material storage shell 18 is temporarily no longer connected to the material guide channel 181, thereby forming a sealed environment in the material storage shell 18. At this time, the step of degassing the molten consumable 1 in the material storage shell 18 is completed again through the movement of the above-mentioned parts. In the process of degassing the molten consumable 1 in the material storage shell 18, since the exhaust pipe 182 is connected to the material storage shell 18, the extrusion plate 71 moves and resets under the action of the adjacent spring, so that the material storage shell 18 quickly becomes a negative pressure environment, thereby shortening the degassing time for the molten consumable 1 in the material storage shell 18.

[0045] During the process of printing the model, the rotating member 32 continuously rotates to squeeze the molten consumable 1 in the material guide channel 181, so that the residual bubbles in the molten consumable 1 are burst by the pressure mentioned above and then enter the air guide channel 60 through the adjacent L-shaped air guide cavity 61.

[0046] When the pressure in the gas guide channel 60 exceeds the threshold of the pressure relief valve therein (when the pressure in the gas guide channel 60 is lower than the threshold of the pressure relief valve therein, the pressure relief valve is closed), the gas in the gas guide channel 60 and the molten consumable 1 flow out from the upper side of the gas guide channel 60 and return to the storage shell 18 again, thereby completing the repeated processing of the molten consumable 1.

[0047] When the printing of the model is completed, the staff controls the second sliding frame 20 to drive the first extrusion block 21 to move forward, so that the first extrusion block 21 removes the printed model, thereby completing the demolding of the model. When the model is no longer needed to be printed, the staff turns off the motor 41 and the external exhaust device of the exhaust pipe 182 and all the electrical components mentioned above.

[0048] In existing 3D printing devices, the throat tube is used to prevent the heated consumables on the lower side from affecting the power components on the upper side of the throat tube. The existing cooling method for the throat tube is only to cool it by blowing air with a fan. When the fan is affected by the heated consumables on the lower side of the throat tube and cannot perform the cooling operation, the temperature of the throat tube will be transmitted to the upper power components, thereby affecting the normal operation of the power components. To solve the above problems, the present invention uses a physical cooling method to cool the throat tube. When the fan is damaged, the throat tube can still be cooled.

[0049] Embodiment 2: On the basis of Embodiment 1, as Figure 3-Figure 7 shown, it further includes a fan 80. The fan 80 is fixedly connected to the left part on the upper side of the heating element 17. The right part on the upper side of the heating element 17 is fixedly connected with a gas guiding member 81. The gas guiding member 81 is composed of a trapezoidal shell and a connecting plate that are fixedly connected to each other. The cross-sectional area on the left side of the trapezoidal shell of the gas guiding member 81 is larger than that on the right side. The right side of the gas guiding member 81 is fixedly connected with a gas guiding pipe 82. The gas guiding pipe 82 is in an F shape. The upper side of the gas guiding pipe 82 is communicated with the gas guiding member 81 and is communicated with the storage shell 18 in the middle of the gas guiding member 81. The blocking member 30 is used to block the communication position between the gas guiding pipe 82 and the storage shell 18.

[0050] As Figure 4 、 Figure 5 and Fig. 9 shown, the throat tube 16 is arranged in a corrugated shape. The outer side of the throat tube 16 is fixedly connected with a liquid storage shell 90. Water is stored in the liquid storage shell 90. The liquid storage shell 90 is fixedly connected with fixing rings 91 arranged in a linear array and all fixedly connected to the throat tube 16. The fixing rings 91 are provided with a number of through holes distributed in an annular array. The cross-section of the liquid storage shell 90 is in the shape of "丰" (a Chinese character), and the outer side of the "丰" shape is inclined upward. The throat tube 16 transfers heat to the water in the liquid storage shell 90, and the water moves upward in a gaseous state to complete the heat transfer. After the gas moves to adhere to the inner wall of the liquid storage shell 90, under the action of the contact between the outer wall of the liquid storage shell 90 and the external environment, the liquid storage shell 90 cools the gas, and the gas flows back into the liquid storage shell 90 in a liquid state again. Through the heat exchange effect of water, the daily cooling of the throat tube 16 is realized.

[0051] During the process of printing a model, the staff starts the fan 80. The fan 80 first cools the liquid storage shell 90, and the liquid storage shell 90 exchanges heat with the throat tube 16 (the throat tube 16 also transfers heat to the liquid storage shell 90 during operation), thereby realizing the cooling of the throat tube 16. When the fan 80 blows the liquid storage shell 90, the heat on the liquid storage shell 90 is carried away by the wind blown by the fan 80, and part of the hot air enters the gas guiding member 81. After the hot air in the gas guiding member 81 enters the gas guiding pipe 82, it then flows out from the lower side. While completing the cooling of the throat tube 16, the heat on the throat tube 16 is transferred.

[0052] When printing the model and the plug 30 no longer blocks the position where the air guide pipe 82 communicates with the material storage shell 18, the plug 30 blocks the position where the air extraction pipe 182 communicates with the material storage shell 18, and the air guide pipe 82 conveys the gas containing temperature into the material storage shell 18, so that the positive pressure environment quickly returns inside the material storage shell 18.

[0053] During the process of cooling the throat pipe 16, the throat pipe 16 transfers heat to the water in the liquid storage shell 90, so that the water moves upward along all the through holes on the fixed ring 91 in a gaseous form, thereby completing the heat transfer. After the gas moves upward, it adheres to the inner wall of the liquid storage shell 90. Under the action of the contact between the outer wall of the liquid storage shell 90 and the external environment and the wind blown by the fan 80 (in this process, the contact between the outer wall of the liquid storage shell 90 and the external environment can also cool the gas inside the liquid storage shell 90. Therefore, it can be known that when the fan 80 cannot blow air, the liquid storage shell 90 can also complete the cooling of the gas inside it), the liquid storage shell 90 cools the gas, so that the gas flows back into the liquid storage shell 90 in the shape of a liquid. Under the action that the liquid storage shell 90 is in the shape of "丰" and the outer side of the "丰" shape is inclined upward, the speed of the liquid flowing downward is accelerated. Subsequently, the above steps are repeated to complete the physical cooling of the throat pipe 16.

[0054] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A 3D printing device with automatic demoulding function, characterized in that: The invention comprises a workbench (10), wherein a mirror-distributed slide rail (11) is fixedly connected to the upper side of the workbench (10), an inverted U-shaped frame (12) is slidably connected to the upper side of the mirror-distributed slide rail (11), the inverted U-shaped frame (12) is slidably connected to a first slide frame (14), the first slide frame (14) is slidably connected to a sliding member (15), a throat (16) is fixedly connected to the lower side of the sliding member (15), a heating member (17) is arranged on the lower side of the throat (16), and the heating member (17) is arranged on the lower side of the throat (16). The lower side of the member (17) is fixedly connected to and communicated with a material storage shell (18), the lower side of the material storage shell (18) is provided with a material guide channel (181) in communication with the material storage shell (18), one side of the material storage shell (18) is fixedly connected to and communicated with an air extraction pipe (182), the lower side of the material storage shell (18) is fixedly connected to a nozzle (19), the sliding member (15), the throat (16) and the heating member (17) are all matched with the consumable material (1), and a demoulding component for processing the model is provided on the workbench (10); A blocking member (30) is rotatably connected to the upper side of the material storage shell (18), and the blocking member (30) is used to block the communication position between the exhaust pipe (182) and the material storage shell (18). The blocking member (30) is fixedly connected to connecting rods (31) distributed in an annular array, and the opposite sides of the connecting rods (31) distributed in an annular array are commonly fixedly connected to a rotating member (32) rotatably matched with the material storage shell (18), and the rotating member (32) is composed of a rotating drum and spiral blades fixedly connected to each other. The material guide channel (181) is truncated cone-shaped, and the spiral blades on the rotating member (32) are located in the material guide channel (181) and are in contact with the material storage shell (18). The lower side of the heating member (17) is fixedly connected to a first fixed shell (33) and a second fixed shell (34); A sliding shell (50) is slidably connected inside the material storage shell (18), and a feeding port distributed in an annular array is arranged on the lower side of the sliding shell (50). The material storage shell (18) and the feeding ports distributed in an annular array on the sliding shell (50) are both blocked and matched. A tension spring is fixedly connected between the sliding shell (50) and the material storage shell (18), a fixed block (51) is fixedly connected to the inner side of the sliding shell (50), and a second extrusion block (52) extruded and matched with the fixed block (51) is fixedly connected to the upper side of the rotating member (32).

2. A 3D printing device with automatic demoulding function according to claim 1, characterized in that: The demoulding assembly comprises a second sliding frame (20), the second sliding frame (20) being slidably connected between the mirror-distributed slide rails (11), the second sliding frame (20) being fixedly connected to a first extrusion block (21), the first extrusion block (21) being slidably matched with the upper side surface of the workbench (10).

3. The 3D printing device with automatic demoulding function according to claim 1, characterized in that: One side of the heating element (17) is fixedly connected with an L-shaped frame (40). The L-shaped frame (40) is provided with a motor (41). The output shaft of the motor (41) passes through the material storage shell (18) and the second fixed shell (34) and is rotationally matched with the two. The outer side of the first fixed shell (33) is rotatably connected with a first gear (42) fixedly connected to the upper sides of the annularly arrayed connecting rods (31). The output shaft of the motor (41) is key-connected with a second gear (43) meshing with the first gear (42).

4. The 3D printing device with automatic demoulding function according to claim 1, characterized in that: A gas guiding channel (60) communicating with the material storage shell (18) is arranged in the rotating part (32). A pressure relief valve is arranged in the gas guiding channel (60) in the rotating part (32). The rotating part (32) is provided with a plurality of L-shaped gas guiding cavities (61). The opposite sides of the plurality of L-shaped gas guiding cavities (61) are all communicated with the gas guiding channel (60). The lower sides of the plurality of L-shaped gas guiding cavities (61) all face the lower side of the material guiding channel (181).

5. The 3D printing device with automatic demoulding function according to claim 4, characterized in that: One side of the material storage shell (18) close to the air extraction pipe (182) is fixedly connected with a gas storage shell (70). The gas storage shell (70) is fixedly connected and communicated with the air extraction pipe (182). A pressing plate (71) is slidably connected in the gas storage shell (70). A spring is fixedly connected between the pressing plate (71) and the gas storage shell (70). A communication hole is arranged on the lower side of the gas storage shell (70).

6. The 3D printing device with automatic demoulding function according to claim 5, characterized in that: It further includes a fan (80). The fan (80) is fixedly connected to one side of the heating element (17) close to the air extraction pipe (182). The heating element (17) is fixedly connected with a gas guiding part (81). One side of the gas guiding part (81) facing away from the fan (80) is fixedly connected and communicated with a gas guiding pipe (82). The middle part of the gas guiding pipe (82) is communicated with the inside of the material storage shell (18). The blocking part (30) is used to block the communication position between the gas guiding pipe (82) and the material storage shell (18).

7. The 3D printing device with automatic demoulding function according to claim 1, characterized in that: The throat pipe (16) is arranged in a corrugated shape. The outer side of the throat pipe (16) is fixedly connected with a liquid storage shell (90). Water is stored in the liquid storage shell (90). The liquid storage shell (90) is fixedly connected with fixing rings (91) arranged in a linear array and all fixedly connected with the throat pipe (16). The fixing rings (91) are provided with a plurality of groups of through holes arranged in an annular array.

8. The 3D printing device with automatic demoulding function according to claim 7, characterized in that: The cross section of the liquid storage shell (90) is in the shape of "丰", and the outer side of the "丰" shape is inclined upward.

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