A 3D printer electric heating device

Abstract

The present invention belongs to the field of 3D printing technology, and specifically is an electric heating device for a 3D printer, comprising a printer head, a heating plate provided below the printer head, a nozzle installed at the bottom end of the heating plate, a cooling fan installed on one side of the printer head, a motor installed on the side of the printer head away from the cooling fan, a first rotating rod fixed to the end of the rotating shaft of the motor, a lifting sleeve provided on the outer sleeve of the first rotating rod, a push rod provided on one side of the lifting sleeve, the push rod capable of passing through the interior of the nozzle, and a steering block fixed on the side of the heating plate close to the first rotating rod; the first rotating rod is driven by the motor to rotate, thereby driving the heating plate to move from below the printer head to below the push rod, and the lifting sleeve is driven by the first rotating rod to move the push rod downward to eject the plastic inside the nozzle, thereby cleaning the interior of the nozzle and preventing the plastic inside the nozzle from being heated and aged multiple times.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D printing, and in particular relates to an electric heating device for a 3D printer. Background Art

[0002] A 3D printer is a processing device that can quickly form something. During the processing, the 3D printer heats the plastic and shapes it to form the desired shape. During the heating process, a heating device is needed to heat the plastic, which becomes soft by heating and can then be shaped.

[0003] The existing technical solution requires a heater to melt the plastic during use and use the melted plastic to shape it. After each use, a portion of the melted plastic will remain inside the heater. After the plastic solidifies, it will be heated again the next time it is used. At this time, the plastic inside the heater is repeatedly heated at high temperature and is prone to aging and carbonization on the outside, which will cause defects on the surface of the molded product.

[0004] To this end, the present invention provides a 3D printer electric heating device. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the electric heating device of a 3D printer described in the present invention includes a printer head, a heating plate is provided under the printer head, a nozzle is installed at the bottom end of the heating plate, a cooling fan is installed on one side of the printer head, a motor is installed on the side of the printer head away from the cooling fan, a first rotating rod is fixed to the end of the rotating shaft of the motor, a lifting sleeve is provided on the outer sleeve of the first rotating rod, a push rod is provided on one side of the lifting sleeve, the push rod can pass through the interior of the nozzle, a steering block is fixed on the side of the heating plate close to the first rotating rod, and a separation component is provided at the bottom end of the first rotating rod.

[0007] Preferably, a plurality of groups of bristles are fixed at equal intervals on the outside of the push rod, and the outer sides of the bristles can be in close contact with the inner surface of the nozzle.

[0008] Preferably, a support frame is provided under the motor, one side of the support frame is fixedly connected to the printer head, and slots are provided at the four corners of the top of the heating plate. A sliding cavity is provided inside the printer head, and a card column is movably connected inside the sliding cavity. The bottom end of the card column is set to a hemispherical shape, and a first spring is fixed to the top of the card column. The top of the first spring is fixedly connected to the inner wall of the sliding cavity, and the bottom end of the card column can be engaged with the slot.

[0009] Preferably, a slider is fixed inside the lifting sleeve, a second slideway is provided on the outside of the first rotating rod, and the slider can be slidably connected to the inside of the second slideway.

[0010] Preferably, a first slideway is provided above the second slideway, and the slider can be slidably connected to the inside of the first slideway.

[0011] Preferably, a support rod is fixed on the side of the lifting sleeve close to the top rod, a movable sleeve is provided on the outer sleeve of the support rod, the top rod is fixed to the bottom end of the movable sleeve, a slide rod is fixed on the side of the movable sleeve close to the printer head, a guide frame is fixed on the side of the printer head close to the slide rod, the slide rod is slidably connected to the inside of the guide frame, and an inclined section is provided on the top of the guide frame for cooperating with the first slide.

[0012] Preferably, both sides of the output port at the bottom end of the printer head are rotatably connected to a second rotating rod, the two second rotating rods are meshedly connected, a cutter is fixed on the side where the two second rotating rods are close to each other, a push rod is meshedly connected on the side of the second rotating rod away from the top rod, the push rod is rotatably connected to the printer head, and a top block is fixed on one side of the bottom end of the first rotating rod.

[0013] Preferably, a metal spring is fixed to one end of the push rod away from the second rotating rod, and the outer side of the metal spring is in close contact with the top block.

[0014] Preferably, the separation component includes a turning groove opened at the top of the turning block, a connecting block is fixed inside the turning groove, a turning block is fixed at the bottom end of the first turning rod, a docking groove is opened on one side of the turning block, the turning block is rotatably connected to the inside of the turning groove, and the connecting block is slidably connected to the inside of the docking groove.

[0015] Preferably, a wedge block is fixed on the side of the support frame close to the top rod, and the inclined surface of the bottom end of the wedge block faces the side of the heating plate. A positioning column is fixed to the bottom end of the inside of the support frame, and the top end of the positioning column is inserted into the bottom end of the steering block. A second spring is sleeved on the outer side of the positioning column, and the bottom end of the second spring is fixedly connected to the support frame, and the top end of the second spring is slidably connected to the steering block. A guide slope is provided at the bottom end of the docking groove away from the top rod.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The electric heating device for a 3D printer described in the present invention drives the first rotating rod to rotate by a motor to drive the heating plate to move from under the printer head to under the ejector rod, and drives the lifting sleeve by the first rotating rod to move the ejector rod downward to eject the plastic inside the nozzle, thereby cleaning the interior of the nozzle and preventing the plastic inside the nozzle from being aged due to repeated heating.

[0018] 2. The electric heating device for a 3D printer described in the present invention drives the top block to push the push rod, so that the second rotating rod rotates to drive the cutter to cut the connection between the plastic wire inside the printer head and the inside of the nozzle, thereby facilitating the subsequent cleaning of the plastic inside the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a perspective view of the present invention;

[0021] Figure 2 It is another perspective perspective diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the bottom structure of the printer head in the present invention;

[0023] Figure 4 Schematic diagram of the push rod structure in the present invention;

[0024] Figure 5 It is a schematic diagram of the heating plate structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the lifting sleeve structure in the present invention;

[0026] Figure 7 It is a schematic diagram of the rotating rod structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the internal structure of the support frame in the present invention;

[0028] Figure 9 It is a structural schematic diagram of the steering block in the present invention.

[0029] In the figure: 1. Printer head; 11. Heating plate; 111. Clamping column; 112. Clamping slot; 113. First spring; 12. Cooling fan; 13. Print head; 2. Motor; 21. Ejector rod; 211. Brush; 22. First rotating rod; 221. Ejector block; 222. First slideway; 223. Second slideway; 224. Rotating block; 225. Docking slot; 23. Support frame; 231. Positioning column; 232. Second spring; 233. Wedge block; 24. Steering block; 241. Rotating slot; 242. Connecting block; 25. Lifting sleeve; 251. Slider; 252. Guide frame; 253. Support rod; 254. Sliding rod; 255. Moving sleeve; 3. Push rod; 31. Metal shrapnel; 32. Second rotating rod; 321. Cutter. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figures 1 to 6As shown, an electric heating device for a 3D printer according to an embodiment of the present invention includes a printer head 1, a heating plate 11 is provided below the printer head 1, a nozzle 13 is mounted on the bottom end of the heating plate 11, a cooling fan 12 is mounted on one side of the printer head 1, a motor 2 is mounted on the side of the printer head 1 away from the cooling fan 12, a first rotating rod 22 is fixed to the end of the rotating shaft of the motor 2, a lifting sleeve 25 is provided on the outside of the first rotating rod 22, a push rod 21 is provided on one side of the lifting sleeve 25, and the push rod 21 can pass through the interior of the nozzle 13, a steering block 24 is fixed on the side of the heating plate 11 close to the first rotating rod 22, and a separation component is provided at the bottom end of the first rotating rod 22;

[0032] The 3D printer is used to print plastic objects. During use, the plastic filament for printing needs to be installed on the printer. Then, one end of the filament is pulled out and loaded into the interior of the printer head 1. The filament is fed into the interior of the nozzle 13 by the wire feeding motor of the printer head 1. The wire feeding motor is a component installed inside the existing printer head 1. Then, the heating plate 11 is energized to generate heat, which is conducted to the interior of the nozzle 13. At this time, the plastic filament can be melted. The melted plastic will be extruded from the interior of the nozzle 13 to the outside as the printer head 1 continues to feed the material. At this time, the internal mechanism of the 3D printer drives the printer head 1 to move, so that the printer head 1 can extrude the molten plastic onto the processing table for shaping, and gradually cool and form it.

[0033] After each printing, a melted portion of the plastic wire will remain inside the nozzle 13 and will solidify inside the nozzle 13. When printing needs to be continued next time, the nozzle 13 needs to be heated again by the heating plate 11. At this time, the plastic remaining in the nozzle 13 will be heated multiple times, which will cause the plastic to age and carbonize on the outside. At this time, after the plastic inside the nozzle 13 is extruded and formed, the structure of the formed plastic article will be unstable and prone to breakage or surface defects. Therefore, the plastic remaining in the nozzle 13 needs to be cleaned after each use. After each printing, the motor 2 is started to rotate. At this time, the motor 2 drives the steering block 24 to rotate through the first rotating rod 22. The steering block 24 drives the heating plate 11 to rotate to the bottom of the ejector rod 21. At this time, the heating plate 11 drives the nozzle 13 to rotate to a position aligned with the ejector rod 21. Then the motor 2 continues to drive the first rotating rod 22 to rotate. At this time, the separation component can separate the first rotating rod 22 from the steering block 24 to prevent the steering block 24 from interfering with the continued rotation of the first rotating rod 22. The first rotating rod 22 drives the lifting sleeve 25 to move downward, and the lifting sleeve 25 drives the ejector rod 21 to move downward. At this time, the ejector rod 21 can be inserted into the interior of the nozzle 13 to eject the solidified plastic inside the nozzle 13. At this time, the plastic wire that has melted and solidified inside the nozzle 13 can be cleaned, which can prevent the plastic from being heated multiple times and affecting the quality of the molded items.

[0034] like Figures 1 to 6 As shown, multiple groups of bristles 211 are fixed to the outside of the top rod 21 at equal intervals, and the outer sides of the bristles 211 can be in close contact with the inner surface of the nozzle 13;

[0035] During use, some wires may carry foreign matter. The foreign matter remains inside the nozzle 13 and is squeezed out along with the molten plastic, which may affect the stability of the molded plastic article. Therefore, when the ejector pin 21 is inserted into the nozzle 13, the bristles 211 will sweep the inner wall of the nozzle 13 along with the ejector pin 21. At this time, the bristles 211 can clean the dirt inside the nozzle 13, keep the inside of the nozzle 13 clean in subsequent use, and prevent impurities from affecting the molding of the plastic.

[0036] like Figures 1 to 5 As shown, a support frame 23 is provided below the motor 2, one side of the support frame 23 is fixedly connected to the printer head 1, and a card slot 112 is provided at the four corners of the top of the heating plate 11. A sliding cavity is provided inside the printer head 1, and a card column 111 is movably connected inside the sliding cavity. The bottom end of the card column 111 is set to be hemispherical, and a first spring 113 is fixed to the top of the card column 111. The top of the first spring 113 is fixedly connected to the inner wall of the sliding cavity, and the bottom end of the card column 111 can be engaged with the card slot 112;

[0037] During use, the heating plate 11 and the printer head 1 need to maintain a stable connection. Therefore, during use, the elastic force of the first spring 113 pushes the card post 111 into the inside of the card slot 112, and the heating plate 11 can be aligned with the bottom end of the printer head 1. After use, the heating plate 11 needs to be rotated to the bottom end of the ejector 21 for cleaning. During this process, the heating plate 11 is driven to rotate, and the card post 111 is pushed out from the inside of the card slot 112 under the rotation force of the heating plate 11. At the same time, the card post 111 squeezes the first spring 113, and the heating plate 11 can be removed from the bottom end of the printer head 1. After cleaning, the heating plate 11 needs to be rotated back to the bottom of the printer head 1. At this time, the heating plate 11 rotates toward the bottom of the printer head 1, and the edge of the heating plate 11 will contact the bottom of the card column 111. The card column 111 can be raised under the hemispherical guidance at the bottom of the card column 111. When the heating plate 11 is reset, the four card columns 111 will be stuck into the inside of the card slot 112 under the elastic force of the card slot 112. At this time, the heating plate 11 can be limited to the bottom of the printer head 1, which can facilitate the alignment between the heating plate 11 and the printer head 1, and prevent the plastic wire of the printer head 1 from entering the interior of the nozzle 13.

[0038] like Figures 1 to 7 As shown, a slider 251 is fixed inside the lifting sleeve 25, and a second slideway 223 is provided on the outside of the first rotating rod 22. The slider 251 can be slidably connected to the inside of the second slideway 223;

[0039] When the push rod 21 needs to be inserted into the interior of the nozzle 13, the first rotating rod 22 needs to drive the lifting sleeve 25 to move downward. At this time, the first rotating rod 22 rotates counterclockwise through the second slide 223 to drive the slider 251. At this time, the slider 251 will drive the lifting sleeve 25 downward under the action of the second slide 223. The lifting sleeve 25 can drive the push rod 21 to move downward during the downward movement. At this time, the push rod 21 can be inserted into the interior of the nozzle 13, so that the push rod 21 can drive the nozzle 13 to be cleaned. After cleaning, the motor 2 drives the first rotating rod 22 to rotate clockwise. At this time, the first rotating rod 22 will drive the lifting sleeve 25 to rise, and then the first rotating rod 22 drives the steering block 24 to rotate to reset the heating plate 11.

[0040] like Figures 1 to 7 As shown, a first slideway 222 is provided above the second slideway 223, and a slider 251 can be slidably connected to the interior of the first slideway 222;

[0041] When the first rotating rod 22 drives the steering block 24 to rotate to the bottom of the top rod 21, in order to prevent the top rod 21 from interfering with the heating plate 11 at this time, the first slide 222 is set above the second slide 223. During the process of the first rotating rod 22 driving the steering block 24 to rotate, the slider 251 slides inside the first slide 222. At this time, the first slide 222 can provide a certain buffer space for the top rod 21 to move downward. During this process, the top rod 21 will not contact the heating plate 11, and interference between the top rod 21 and the heating plate 11 can be prevented.

[0042] like Figures 1 to 7 As shown, a support rod 253 is fixed to the side of the lifting sleeve 25 close to the ejector pin 21, a movable sleeve 255 is sleeved on the outside of the support rod 253, the ejector pin 21 is fixed to the bottom end of the movable sleeve 255, a slide rod 254 is fixed to the side of the movable sleeve 255 close to the printer head 1, a guide frame 252 is fixed to the side of the printer head 1 close to the slide rod 254, the slide rod 254 is slidably connected to the inside of the guide frame 252, and an inclined section is provided on the top of the guide frame 252 for cooperating with the first slide 222;

[0043] During use, the ejector rod 21 will affect the movement of the printer head 1. Therefore, during daily use, the ejector rod 21 will be stored in a position close to the first rotating rod 22. When the ejector rod 21 needs to be cleaned, the motor 2 is started to drive the first rotating rod 22 to rotate. At this time, the first rotating rod 22 drives the first slide 222 to drive the slider 251 to move downward. The slider 251 drives the lifting sleeve 25 to move downward, so that the lifting sleeve 25 can push the movable sleeve 255 downward through the support rod 253. During the downward movement of the movable sleeve 255, it will slide inside the guide frame 252 through the slide rod 254. The inclined section of the guide frame 252 guides the slide rod 254 in the direction away from the first rotating rod 22. During this process, the slide bar 254 drives the movable sleeve 255 away from the first rotating rod 22, so that the movable sleeve 255 can drive the ejector rod 21 to move away from the position close to the first rotating rod 22, and then the ejector rod 21 will be driven to the position where it needs to be used. When the movable sleeve 255 drives the ejector rod 21 to move downward in a vertical state, the rear half of the guide frame 252 will guide the slide bar 254 in a vertical state. At this time, the ejector rod 21 can be stably inserted into the interior of the nozzle 13. After the first rotating rod 22 rotates clockwise, the guide frame 252 will guide the slide bar 254 so that the movable sleeve 255 drives the ejector rod 21 to reset, so that the ejector rod 21 can automatically enter the working position and be automatically stored.

[0044] like Figures 1 to 7 As shown, second rotating rods 32 are rotatably connected to both sides of the output port at the bottom end of the printer head 1. The two second rotating rods 32 are meshedly connected. A cutter 321 is fixed to the side of the two second rotating rods 32 close to each other. The side of the second rotating rod 32 away from the ejector rod 21 is meshedly connected to the push rod 3. The push rod 3 is rotatably connected to the printer head 1. A ejector block 221 is fixed to one side of the bottom end of the first rotating rod 22.

[0045] Before the heating plate 11 rotates, the plastic wire inside the nozzle 13 needs to be cut off from the plastic wire inside the printer head 1. During this process, the rotation of the first rotating rod 22 will drive the top block 221 to rotate. After the top block 221 rotates, it will push the end of the push rod 3. After the push rod 3 is pushed, it will drive the second rotating rod 32 to rotate. At this time, the two second rotating rods 32 rotate towards each other. During this process, the two second rotating rods 32 drive the cutter 321 to rotate. The cutter 321 contacts the wire and can cut the wire. After the wire is cut, the heating plate 11 can rotate.

[0046] like Figures 1 to 7 As shown, a metal spring 31 is fixed to one end of the push rod 3 away from the second rotating rod 32 , and the outer side of the metal spring 31 is in close contact with the top block 221 ;

[0047] When the top block 221 contacts the push rod 3, the metal spring 31 will be tightly attached to the top block 221. At this time, the top block 221 will push the metal spring 31 to drive the push rod 3 to rotate. After the second rotating rod 32 is sheared, the closing push rod 3 will be in a fixed state. At this time, the push rod 3 keeps the metal spring 31 in its original position. The metal spring 31 will be deformed under the continued rotation of the top block 221. When the metal spring 31 is deformed, the top block 221 continues to rotate to separate the top block 221 from the metal spring 31. Then the heating plate 11 can be rotated to the bottom of the top rod 21. When the nozzle 1 When the heating plate 11 is reset after cleaning, the first rotating rod 22 drives the top block 221 to contact the metal spring 31 again. The top block 221 pushes the metal spring 31 to drive the push rod 3 to rotate in the opposite direction to reset. At this time, the push rod 3 can drive the two second rotating rods 32 to reset. When the second rotating rods 32 are reset, they will be blocked by the limit columns on both sides. At this time, the push rod 3 remains fixed, and the top block 221 will squeeze the metal spring 31 again to deform it. After deformation, the top block 221 separates from the metal spring 31. At this time, the top block 221 is reset, which can automatically reset the second rotating rods 32.

[0048] like Figures 1 to 9 As shown, the separation assembly includes a rotation groove 241 provided at the top of the steering block 24, a connecting block 242 being fixed inside the rotation groove 241, a rotation block 224 being fixed at the bottom end of the first rotating rod 22, a docking groove 225 being provided on one side of the rotation block 224, the rotation block 224 being rotatably connected to the inside of the rotation groove 241, and the connecting block 242 being slidably connected to the inside of the docking groove 225;

[0049] When the first rotating rod 22 drives the top block 221 to push the metal spring piece 31, the steering block 24 needs to remain in a fixed state. Therefore, the steering block 224 is fixed at the bottom end of the first rotating rod 22. When the first rotating rod 22 drives the top block 221 to push the metal spring piece 31, the first rotating rod 22 also drives the rotating block 224, and the rotating block 224 drives the docking groove 225 to rotate on the outer side of the connecting block 242. When the first rotating rod 22 drives the top block 221 to push the metal spring piece 31 to move and separate from the metal spring piece 31, the side of the docking groove 225 is in contact with the connecting block 242. When the rotating block 224 rotates, it pushes the connecting block 242. The connecting block 242 drives the steering block 24 to rotate, which can rotate the heating plate 11. The reverse rotation of the first rotating rod 22 can cause the other side of the docking groove 225 to push the connecting block 242, and the connecting block 242 can drive the steering block 24 to reset.

[0050] like Figures 1 to 9As shown, a wedge block 233 is fixed to the side of the support frame 23 close to the push rod 21, and the inclined surface of the bottom end of the wedge block 233 faces the side of the heating plate 11. A positioning column 231 is fixed to the bottom end of the support frame 23. The top end of the positioning column 231 is inserted into the bottom end of the steering block 24. A second spring 232 is sleeved on the outer side of the positioning column 231. The bottom end of the second spring 232 is fixedly connected to the support frame 23, and the top end of the second spring 232 is slidably connected to the steering block 24. A guide slope is provided at the bottom end of the docking groove 225 away from the push rod 21.

[0051] After the slider 251 passes through the first slide 222, the second slide 223 will drive the slider 251 to move downward. During this process, the top rod 21 needs to move downward, but the heating plate 11 needs to remain fixed. Therefore, after the heating plate 11 rotates to the bottom of the top rod 21, it needs to be disconnected from the first rotating rod 22. When the heating plate 11 rotates close to the bottom of the top rod 21, the side of the steering block 24 will contact the wedge block 233. The inclined surface of the wedge block 233 will push the steering block 24 downward. At this time, the steering block 24 The second spring 232 will be squeezed downward, and the slope of the docking groove 225 will contact the edge of the top of the connecting block 242 under the push of the wedge block 233. At this time, the first rotating rod 22 drives the rotating block 224 to continue to rotate. The rotating block 224 drives the connecting block 242 through the friction force of the slope of the docking groove 225 to rotate the steering block 24 to the bottom of the top rod 21. Then, under the limiting action of the support frame 23, the steering block 24 will remain fixed. At this time, the first rotating rod 22 drives the rotating block 224 to continue to rotate, so that the lifting sleeve 25 drives the top rod 21 The nozzle 13 is lowered to clean the inside. During this process, the slope of the docking groove 225 will push the connecting block 242 downward until the rotating block 224 is completely placed above the steering block 24. The bottom end of the rotating block 224 is in a smooth state, which can prevent the rotating block 224 from rotating when it rotates at the top of the steering block 24. After the top rod 21 is cleaned, the first rotating rod 22 rotates in the opposite direction to raise the top rod 21. At this time, the first rotating rod 22 will also drive the rotating block 224 to rotate. When the rotating block 224 rotates to the reset position, the second spring 232 will rotate the rotating block 224. The steering block 24 is pushed upward. At this time, the rotating block 224 moves back to the inside of the rotating groove 241. The rotating block 224 continues to rotate and pushes the connecting block 242 to rotate through the docking groove 225. At this time, the connecting block 242 drives the heating plate 11 to reset through the steering block 24. During the reset process, the steering block 24 rotates and separates from the wedge block 233. At this time, the elastic force of the second spring 232 continues to push the steering block 24 to reset upward. In this way, the steering block 24 and the first rotating rod 22 can automatically switch between connection and disconnection according to the working state.

[0052] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printer electric heating device, characterized by: The printer comprises a printer head, a heating plate is provided below the printer head, a nozzle is installed at the bottom end of the heating plate, a cooling fan is installed on one side of the printer head, a motor is installed on the side of the printer head away from the cooling fan, a first rotating rod is fixed to the end of the rotating shaft of the motor, a lifting sleeve is provided on the outer sleeve of the first rotating rod, a push rod is provided on one side of the lifting sleeve, and the push rod can pass through the interior of the nozzle, a steering block is fixed on the side of the heating plate close to the first rotating rod, and a separation component is provided at the bottom end of the first rotating rod; A support frame is provided below the motor, one side of the support frame is fixedly connected to the printer head, a card slot is provided at each of the four corners of the top of the heating plate, a sliding cavity is provided inside the printer head, a card column is movably connected inside the sliding cavity, the bottom end of the card column is set to be hemispherical, a first spring is fixed to the top end of the card column, the top end of the first spring is fixedly connected to the inner wall of the sliding cavity, and the bottom end of the card column can be engaged with the card slot; A slider is fixed inside the lifting sleeve, and a second slideway is provided on the outside of the first rotating rod. The slider can be slidably connected to the inside of the second slideway. A first slideway is provided above the second slideway, and the slider is slidably connected to the inside of the first slideway; A support rod is fixed to the side of the lifting sleeve close to the ejector rod, a movable sleeve is provided on the outer sleeve of the support rod, the ejector rod is fixed to the bottom end of the movable sleeve, a slide rod is fixed to the side of the movable sleeve close to the printer head, a guide frame is fixed to the side of the printer head close to the slide rod, the slide rod is slidably connected to the inside of the guide frame, and an inclined section is provided on the top of the guide frame for cooperating with the first slideway; A second rotating rod is rotatably connected to both sides of the output port at the bottom end of the printer head. The two second rotating rods are meshed and connected. A cutter is fixed on the side of the two second rotating rods close to each other. A push rod is meshed and connected on the side of the second rotating rod away from the ejector rod. The push rod is rotatably connected to the printer head. A ejector block is fixed to one side of the bottom end of the first rotating rod. The separation component includes a rotating groove opened at the top of the steering block, a connecting block is fixed inside the rotating groove, a rotating block is fixed at the bottom end of the first rotating rod, a docking groove is opened on one side of the rotating block, the rotating block is rotatably connected to the inside of the rotating groove, and the connecting block is slidably connected to the inside of the docking groove.

2. The 3D printer electric heating device according to claim 1, characterized in that: A plurality of groups of bristles are fixed at equal intervals on the outside of the ejector rod, and the outer sides of the bristles can be in close contact with the inner surface of the nozzle.

3. The 3D printer electric heating device according to claim 1, characterized in that: A metal spring is fixed to one end of the push rod away from the second rotating rod, and the outer side of the metal spring is in close contact with the top block.

4. The 3D printer electric heating device according to claim 1, characterized in that: A wedge block is fixed on the side of the support frame close to the top rod, and the inclined surface of the bottom end of the wedge block faces the heating plate side. A positioning column is fixed on the bottom end of the support frame, and the top end of the positioning column is inserted into the bottom end of the steering block. A second spring is sleeved on the outer side of the positioning column, and the bottom end of the second spring is fixedly connected to the support frame, and the top end of the second spring is slidably connected to the steering block. A guide slope is provided at the bottom end of the docking groove away from the top rod.

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