A 3D printing electric heating platform and a 3D printer

Abstract

The present invention belongs to the technical field of 3D printing, and specifically is a 3D printing electric heating platform and a 3D printer. The 3D printing electric heating platform comprises a support and a platform body, wherein the platform body is provided with an electric heating unit and also comprises a preheating auxiliary mechanism; the preheating auxiliary mechanism comprises: a plurality of air storage chambers rotatably arranged on the support; a piston member movably inserted in the air storage chamber; a rotating shaft rotatably arranged at the opening; a heat insulation plate and a heat conducting plate fixedly connected to the rotating shaft; by arranging the preheating auxiliary mechanism, the air storage chamber is used to collect the heat emitted during the cooling process of the platform body, and the piston member is cooperated to spray the stored hot air onto the platform body for preheating, which not only reduces the preheating time and improves the preheating efficiency, but also improves the situation where heat energy is wasted, reduces the working time and energy consumption, and saves the use cost.

Description

Technical Field

[0001] The invention belongs to the field of 3D printing, and specifically relates to a 3D printing electric heating platform and a 3D printer. Background Art

[0002] During the printing process of a 3D printer, after the material is extruded from the nozzle, it needs to be cooled and solidified in a stable environment. The heating platform can provide a uniform temperature field and keep the temperature of the printing platform stable, which can not only make the printing material adhere to the platform better and prevent displacement or falling off during the printing process, but also make the material shrink more evenly during the cooling process, reducing problems such as warping and deformation. Especially for temperature-sensitive plastic additives such as ABS, the heating platform can significantly improve the printing quality.

[0003] Existing 3D printing heating platforms mostly use electric heating. In actual use, in order to ensure that the printing material can adhere well to the platform, the 3D printer heating platform needs to be preheated before printing. Taking ABS as an example, it is easy to warp when the temperature is low. Preheating can make the printing platform reach a suitable temperature and reduce the shrinkage and warping of the material caused by temperature difference. When printing is completed, the heating platform needs to be cooled to facilitate users to remove the printed products. Therefore, the electric heating platform needs to be continuously preheated and cooled during the printing process. In this process, the traditional electric heating platform does not recycle the heat emitted during cooling, resulting in energy waste.

[0004] To this end, the present invention provides a 3D printing electric heating platform and a 3D printer. 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 the technical problem is: a 3D printing electric heating platform described in the present invention includes a support and a platform body, the platform body is provided with an electric heating unit, and also includes a preheating auxiliary mechanism;

[0007] The preheating auxiliary mechanism includes: a plurality of air storage chambers rotatably arranged on the support, the air storage chamber is a heat-insulating chamber, one side of the air storage chamber is provided with an opening, and the opening faces the platform body; a piston member movably inserted in the air storage chamber, the piston member is provided with a return spring, after the piston member moves inward, the gas in the air storage chamber is discharged through the opening and blown onto the platform body; a rotating shaft rotatably arranged at the opening; a heat-insulating plate and a heat-conducting plate fixedly connected to the rotating shaft, after the rotating shaft rotates, the opening is sealed by one of the heat-insulating plate and the heat-conducting plate.

[0008] Preferably, the heat insulating plate is in the shape of an arc concentric with the rotating shaft, the heat conducting plate is in the shape of a flat plate, and a gap is left between the heat insulating plate and the heat conducting plate.

[0009] Preferably, the preheating auxiliary mechanism further includes: a lifting plate slidably arranged on the support; and a first gear fixedly connected to the air storage chamber, the lifting plate being meshingly connected to the first gear.

[0010] Preferably, the preheating auxiliary mechanism also includes: a second gear fixedly connected to the rotating shaft; an arc-shaped tooth plate fixedly connected to the support, the arc-shaped tooth plate is coaxial with the air storage chamber, and during the rotation of the air storage chamber, the arc-shaped tooth plate contacts and meshes with the second gear to drive the rotating shaft to rotate.

[0011] Preferably, it also includes a cleaning mechanism, which includes: a scraper slidably arranged on the outside of the air storage chamber, after the air storage chamber rotates to above the platform body, the scraper moves to scrape and clean the surface of the platform body; a telescopic rod, the two ends of the telescopic rod are respectively connected to the scraper and the air storage chamber; a spring member, the two ends of the spring member are respectively connected to the scraper and the air storage chamber.

[0012] Preferably, the cleaning mechanism also includes: a movable plate slidably arranged on the scraper; a follower rotatably arranged on the movable plate, the follower being a unidirectional rotating structure; a paddle plate fixedly connected to the piston member, after the piston member moves outward, the paddle plate is pushed to move in one direction by the paddle plate, and the scraper is driven away from the platform body.

[0013] Preferably, the cleaning mechanism also includes: a push spring provided on the scraper for driving the movable plate to align with the paddle plate; a top plate provided on the air storage chamber, the top plate being a one-way rotating structure, and a slope for pushing the movable plate to move is provided at the end of the top plate, and the movable plate is staggered with the paddle plate after movement.

[0014] Preferably, a protrusion corresponding to the top plate is provided at the end of the movable plate, the movable plate is located outside the air storage chamber, and the movable plate and the piston member are staggered in distribution.

[0015] A 3D printer adopts the above-mentioned 3D printing electric heating platform, including a frame and the 3D printing electric heating platform, a 3D printing head is movably provided on the frame, and the 3D printing head is located above the platform body.

[0016] Preferably, the platform body is detachably mounted on the support.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The 3D printing electric heating platform and 3D printer described in the present invention, by setting a preheating auxiliary mechanism, use the air storage chamber to collect the heat emitted during the cooling process of the platform body, and cooperate with the piston member to spray the stored hot air onto the platform body for preheating, which not only reduces the preheating time and improves the preheating efficiency, but also improves the situation where heat energy is wasted, reduces the working time and energy consumption, and saves the use cost.

[0019] 2. The 3D printing electric heating platform and 3D printer described in the present invention scrape off the more stubborn printing materials on the surface of the platform body by arranging a scraper on the air storage chamber. The hot air ejected from the air storage chamber can blow and clean the platform body while preheating. The double cleaning effect is better, the cleanliness of the platform body is improved, and it is beneficial to ensure the printing effect.

[0020] 3. The 3D printing electric heating platform and 3D printer described in the present invention, by setting a preheating auxiliary mechanism and a cleaning mechanism, can complete preheating and cleaning tasks by simply controlling the movement of the lifting plate. The heat insulation plate and the heat conduction plate rotate automatically, thereby automatically switching the opening state of the air storage chamber, and the pressure change inside the air storage chamber drives the scraper to move automatically, eliminating the trouble of setting up multiple sets of electrical drive systems. The degree of automation is high and it is suitable for assembly line production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention;

[0023] Figure 2 It is a three-dimensional diagram of the overall structure of the present invention in the preheating state;

[0024] Figure 3 This is the exploded view of the platform body and the lifting plate;

[0025] Figure 4 This is a schematic diagram of the coordination between the air storage chamber and the scraper;

[0026] Figure 5 It is a cross-sectional view of the air storage chamber and the scraper in cooperation;

[0027] Figure 6 It is an exploded view of the air storage chamber, piston and shaft;

[0028] Figure 7 It is an exploded view of the scraper, movable plate and top plate;

[0029] Figure 8 is a stereogram of a second embodiment of the present invention;

[0030] In the figure: 1. support; 2. platform body; 3. preheating auxiliary mechanism; 31. air storage chamber; 311. opening; 312. first gear; 32. piston member; 321. return spring; 33. rotating shaft; 331. second gear; 34. heat insulation plate; 35. heat conduction plate; 36. lifting plate; 37. arc-shaped tooth plate; 4. cleaning mechanism; 41. scraper; 42. telescopic rod; 43. spring member; 44. movable plate; 45. follower; 46. dial plate; 47. push spring; 48. top plate; 5. frame; 6. 3D print head. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1

[0032] like Figure 1-6 As shown, a 3D printing electric heating platform according to an embodiment of the present invention comprises a support 1 and a platform body 2, wherein the platform body 2 is provided with an electric heating unit, and further comprises a preheating auxiliary mechanism 3;

[0033] The preheating auxiliary mechanism 3 includes: a plurality of air storage chambers 31 rotatably arranged on the support 1, the air storage chamber 31 is a heat-insulating chamber, one side of the air storage chamber 31 is provided with an opening 311, and the opening 311 faces the platform body 2; a piston member 32 movably inserted in the air storage chamber 31, and a return spring 321 is provided on the piston member 32. After the piston member 32 moves inward, the gas in the air storage chamber 31 is discharged through the opening 311 and blown onto the platform body 2; a rotating shaft 33 rotatably arranged at the opening 311; a heat insulation plate 34 and a heat conducting plate 35 fixedly connected to the rotating shaft 33. After the rotating shaft 33 rotates, the opening 311 is sealed by one of the heat insulation plate 34 and the heat conducting plate 35.

[0034] Specifically, the platform body 2 is installed above the support 1, and the platform body 2 includes an aluminum substrate layer and a lattice glass layer. The electric heating unit is used to heat the aluminum substrate layer. The electric heating unit includes a temperature detection device to keep the temperature of the platform body 2 stable. Other structures that can achieve heating during 3D printing are also suitable for the manufacture of the platform body 2; the outer side of the air storage chamber 31 is made of an insulating material as a whole, and the interior of the air storage chamber 31 and between the outlet and the piston member 32 are filled with air. A seal is provided at the connection between the rotating shaft 33 and the air storage chamber 31, and the two ends of the return spring 321 are respectively connected to the piston member 32 and the air storage chamber 31. The air pressure change inside the air storage chamber 31 and the cooperation of the return spring 321 can drive the piston member 32 to move back and forth.

[0035] Take the support 1 as an example to illustrate that two groups of air storage chambers 31 are provided. Figure 1 and Figure 5 As shown, the air storage chamber 31 is away from the platform body 2 to facilitate disassembly, assembly and maintenance of the platform body 2; at this time, the opening 311 in the air storage chamber 31 faces upward, and the heat insulation plate 34 completely blocks the opening 311 to maintain the sealing of the air storage chamber 31 to prevent the heat outside the air storage chamber 31 from entering the inside of the air storage chamber 31, and the heat conducting plate 35 is located inside the air storage chamber 31, and the heat conducting plate 35 is staggered with the opening 311.

[0036] Before printing, the electric heating unit is started to preheat the platform body 2 so that the printing material can be well attached to the platform body 2. During the printing process, the platform body 2 maintains a stable temperature. During this process, the air storage chamber 31 is in a sealed and heat-insulated state, and the air storage chamber 31 does not absorb the heat during the printing process, so as not to affect the preheating and heating work;

[0037] After printing is completed, the platform needs to be cooled so that the printed product can be removed. At this time, the electric heating unit is turned off and the air storage chamber 31 is started to rotate so that the opening 311 of the air storage chamber 31 is close to the platform body 2. Figure 2 As shown, the shaft 33 is started to rotate so that the heat conducting plate 35 rotates to the position of the opening 311. For example, Figure 5 In the embodiment, the rotating shaft 33 is rotated 90° clockwise, the heat insulation plate 34 and the heat conducting plate 35 seal the opening 311 together, the interior of the gas storage chamber 31 is still sealed, and the heat emitted by the platform body 2 during cooling enters the gas storage chamber 31 through the heat conducting plate 35, the gas storage chamber 31 collects heat, and the gas temperature inside the gas storage chamber 31 increases and the pressure increases, pushing the piston 32 to move outward (the movement of the piston 32 away from the outlet is outward movement, and the opposite is inward movement);

[0038] After the platform body 2 cools to the set temperature, the printed product is removed from the platform body 2. Before preparing for the next printing job, the platform needs to be preheated. At this time, the electric heating unit is started to preheat the platform body 2, and the rotating shaft 33 continues to be rotated clockwise, so that the end of the heat conduction plate 35 moves to the outside of the air storage chamber 31, and a gap is generated between the heat conduction plate 35 and the opening 311. The hot air in the air storage chamber 31 is ejected outwardly to the platform body 2 through the gap, thereby accelerating the preheating efficiency of the platform body 2; after the hot air in the air storage chamber 31 is discharged, the return spring 321 pushes the piston 32 to move inward and return to its original position, and the surrounding low-temperature air automatically enters the air storage chamber 31 through the gap. Of course, the low-temperature gas can also be added to the air storage chamber 31 by an external air intake pipe; after preheating, the air storage chamber 31 and the rotating shaft 33 are rotated back to the initial state, and the cycle is repeated. During operation, the heating platform recycles the heat generated during cooling to preheat and clean the platform body 2, which not only reduces the preheating time and improves the preheating efficiency, but also improves the situation where heat energy is wasted, reduces the working time and energy consumption of the electric heating unit, and saves the cost of use.

[0039] Keeping the platform body 2 clean is directly related to the quality of 3D printing. If there is dirt, dust or residual printing material on the surface of the platform body 2, it will affect the adhesion between the printing material and the platform body 2. Conventional methods often use a brush to sweep away impurities and loose residual printing materials on the surface of the platform body 2, which is time-consuming and labor-intensive. During the operation of the heating platform, hot air is sprayed from the inside of the air storage chamber 31 onto the surface of the platform body 2. While preheating, the surface of the platform body 2 can also be blown and cleaned, which plays a role in automatically cleaning the platform body 2, improving the cleanliness of the platform body 2, and no manual operation is required, which is more convenient to use.

[0040] like Figure 4-6 As shown, the heat insulating plate 34 is in an arc shape concentric with the rotating shaft 33 , and the heat conducting plate 35 is in a flat plate shape, with a gap left between the heat insulating plate 34 and the heat conducting plate 35 .

[0041] Specifically, the heat insulating plate 34 and the heat conducting plate 35 are in a T-shape as a whole. During the rotation of the rotating shaft 33, the portion of the heat insulating plate 34 that contacts the opening 311 is always in a sealed state. Figure 5 In the figure, there are gaps below the heat insulation plate 34 and on the left and right sides of the heat conduction plate 35. By setting the gaps, the gas in the gas storage chamber 31 can be discharged to the outside.

[0042] like Figure 1-5 As shown, the preheating auxiliary mechanism 3 further includes: a lifting plate 36 slidably arranged on the support 1; and a first gear 312 fixedly connected to the air storage chamber 31 , and the lifting plate 36 is meshingly connected with the first gear 312 .

[0043] Specifically, the lifting plate 36 can move up and down, and the lifting plate 36 is provided with a tooth segment meshing with the first gear 312. The support 1 is provided with a driving rod for controlling the lifting plate 36 to move up and down. The driving rod can be a hydraulic push rod or an electric push rod, and a self-locking device is provided on the driving rod. After the lifting plate 36 moves up and down, the cooperation between the tooth segment and the first gear 312 drives the air storage chamber 31 to rotate back and forth.

[0044] like Figure 1-6 As shown, the preheating auxiliary mechanism 3 also includes: a second gear 331 fixedly connected to the rotating shaft 33; an arc-shaped tooth plate 37 fixedly connected to the support 1, and the arc-shaped tooth plate 37 is coaxial with the air storage chamber 31. During the rotation of the air storage chamber 31, the arc-shaped tooth plate 37 contacts and meshes with the second gear 331, and drives the rotating shaft 33 to rotate.

[0045] Specifically, the end of the rotating shaft 33 extends to the outside of the air storage chamber 31, the second gear 331 is located on the outside of the air storage chamber 31, and a tooth segment is provided in the portion of the arc-shaped tooth plate 37 close to the platform body 2. When the air storage chamber 31 rotates above the platform body 2, the tooth segment in the arc-shaped tooth plate 37 contacts and engages with the second gear 331, thereby driving the rotating shaft 33 to rotate.

[0046] like Figure 1-7 As shown, it also includes a cleaning mechanism 4, which includes: a scraper 41 slidably arranged on the outside of the air storage chamber 31, after the air storage chamber 31 rotates to above the platform body 2, the scraper 41 moves to scrape and clean the surface of the platform body 2; a telescopic rod 42, the two ends of the telescopic rod 42 are respectively connected to the scraper 41 and the air storage chamber 31; a spring member 43, the two ends of the spring member 43 are respectively connected to the scraper 41 and the air storage chamber 31.

[0047] Specifically, the scraper 41 is preferably made of a plastic material that does not damage the platform body 2, and is used to scrape off the stubborn printing material remaining on the surface of the platform body 2. During the preheating process, after the air storage chamber 31 rotates to be close to the platform body 2, the scraper 41 is located above the platform body 2, and the bottom end of the scraper 41 is aligned with the top surface of the platform body 2. The movement of the scraper 41 toward the center of the platform body 2 is inward movement, and the movement of the scraper 41 toward the center of the platform body 2 is outward movement. Figure 2 As shown, after the scraper 41 is pulled outward, the spring member 43 is compressed to store energy. After the scraper 41 is released, the spring member 43 releases energy to push the scraper 41 to move quickly. The scraper 41 moves to the surface of the platform body 2 under the push of the spring member 43 and the action of inertia force, and scrapes and cleans the platform body 2, thereby further improving the cleanliness of the platform body 2.

[0048] It should be noted that the installation position and number of the air storage chambers 31, as well as the moving stroke, moving mode and moving sequence of the scraper 41, can be selected according to specific circumstances to ensure that the scraper 41 can clean the surface of the platform body 2 after moving.

[0049] like Figure 1-7 As shown, the cleaning mechanism 4 also includes: a movable plate 44 slidably arranged on the scraper 41; a follower 45 rotatably arranged on the movable plate 44, and the follower 45 is a unidirectional rotating structure; a paddle 46 fixedly connected to the piston member 32, after the piston member 32 moves outward, the paddle 46 is pushed to move in one direction by the paddle 46, and drives the scraper 41 away from the platform body 2.

[0050] Specifically, a return torsion spring is provided at the rotation position of the follower 45; the moving direction of the movable plate 44 is perpendicular to the moving direction of the scraper 41. Figure 4 and Figure 7 In the embodiment, the scraper 41 can move up and down, and the movable plate 44 can move laterally. During the reciprocating movement of the piston member 32, the paddle 46 only contacts the driven member 45 and drives the movable plate 44 and the scraper 41 to move outward.

[0051] like Figure 4-7 As shown, the cleaning mechanism 4 also includes: a push spring 47 arranged on the scraper 41 for driving the movable plate 44 to align with the paddle plate 46; a top plate 48 arranged on the air storage chamber 31, the top plate 48 is a unidirectional rotating structure, and the end of the top plate 48 is provided with a slope for pushing the movable plate 44 to move, and the movable plate 44 is staggered with the paddle plate 46 after moving.

[0052] like Figure 4-7 As shown, a protrusion corresponding to the top plate 48 is provided at the end of the movable plate 44 , and the movable plate 44 is located outside the air storage chamber 31 , and the movable plate 44 and the piston member 32 are staggered.

[0053] Specifically, the scraper 41 and the movable plate 44 do not directly contact the piston member 32 during the movement. A protrusion is provided at one end of the movable plate 44 and a protrusion for blocking the follower 45 is provided at the other end.

[0054] A return torsion spring is provided at the rotation position of the top plate 48. Figure 4For example, the lengths of the upper protrusion and the lower protrusion of the movable plate 44 are different. During the upward and downward movement of the scraper 41, the upper protrusion of the movable plate 44 can contact the top plate 48, and the lower protrusion of the movable plate 44 never contacts the top plate 48. Initially, the paddle 46 is located above the follower 45. After the piston 32 moves outward, that is, moves downward, it drives the follower 45 and the movable plate 44 to move downward, and then drives the scraper 41 to move downward. Finally, the movable plate 44 moves to the bottom of the top plate 48.

[0055] During preheating, after the hot air in the air storage chamber 31 is discharged outward, the internal pressure of the air storage chamber 31 becomes low, and the return spring 321 pushes the piston member 32 to move upward. After the piston member 32 moves inward, the scraper 41 also moves inward. After the scraper 41 moves inward, the protrusion at the upper end of the movable plate 44 contacts the top plate 48, and the top plate 48 pushes the movable plate 44 to move, so that the follower 45 in the movable plate 44 is separated from the paddle plate 46, and the paddle plate 46 is no longer restrained. The spring member 43 pushes the scraper 41 to move quickly. Since the piston member 32 is affected by the internal pressure of the air storage chamber 31, its inward movement speed is slower than the movement speed of the scraper 41. Therefore, before the gas in the air storage chamber 31 is completely discharged, the scraper 41 has already contacted the platform body 2, thereby realizing the scraping and cleaning of the scraper 41 while the ejected airflow performs the function of blowing and brushing, so that the impurities scraped off by the scraper 41 can also be blown away, and the automatic cleaning effect is better. Embodiment 2

[0056] like Figure 8 As shown, compared with Example 1, another embodiment of the present invention is: a 3D printer, which adopts the above-mentioned 3D printing electric heating platform, including a frame 5 and a 3D printing electric heating platform, and a 3D printing head 6 is movably provided on the frame 5, and the 3D printing head 6 is located above the platform body 2.

[0057] Specifically, the 3D printing electric heating platform is fixed on the frame 5 by means of screws, clips, etc., the 3D printing head 6 is connected to an external material bin, and the printing material is placed in the material bin. The frame 5 is provided with a control system for controlling the movement of the 3D printing head 6.

[0058] like Figure 8 As shown, the platform body 2 is detachably mounted on the support 1 .

[0059] Specifically, when the air storage chamber 31 is away from the platform body 2, the platform body 2 can be disassembled and replaced, so as to be suitable for different types of printing work.

[0060] Working principle: Before 3D printing, the electric heating unit is started to preheat the platform body 2 so that the printing material can be well attached to the platform body 2. During the printing process, the platform body 2 maintains a stable temperature. During this process, the air storage chamber 31 is in a sealed and heat-insulated state. The air storage chamber 31 does not absorb the heat during the printing process, so as not to affect the preheating and heating work;

[0061] After printing is completed, the platform needs to be cooled so that the printed product can be removed. At this time, the electric heating unit is turned off and the lifting plate 36 is started to move downward. After the lifting plate 36 moves downward, the air storage chamber 31 is driven to rotate so that the opening 311 of the air storage chamber 31 is close to the platform body 2. The rotated air storage chamber 31 is as shown in FIG. Figure 2 As shown; when the air storage chamber 31 rotates to a horizontal position, the tooth segments in the arc-shaped tooth plate 37 are in contact and mesh with the second gear 331, thereby driving the rotating shaft 33 to rotate, so that the heat conducting plate 35 rotates to the position of the opening 311; then, the heat emitted by the platform body 2 during cooling enters the air storage chamber 31 through the heat conducting plate 35, and the air storage chamber 31 collects heat. When the temperature of the gas inside the air storage chamber 31 increases, the pressure increases, and the piston member 32 is pushed outward;

[0062] During the outward movement of the piston member 32, the scraper plate 41 is driven to move outward through the cooperation between the shifting plate 46 and the follower 45. During this process, the spring member 43 is compressed.

[0063] After the platform body 2 cools to the set temperature, the printed product is taken away from the platform body 2. Before preparing for the next printing job, the platform needs to be preheated. At this time, the electric heating unit is started to preheat the platform body 2 while continuing to move the lifting plate 36 downward. The lifting plate 36 drives the air storage chamber 31 to continue to rotate, and the second gear 331 continues to mesh with the tooth segment in the arc-shaped tooth plate 37. The shaft 33 continues to rotate, so that the end of the heat conduction plate 35 moves to the outside of the air storage chamber 31, and a gap is generated between the heat conduction plate 35 and the opening 311. The hot air in the air storage chamber 31 is ejected outwardly through the gap to the platform body 2, thereby accelerating the preheating efficiency of the platform body 2. At the same time, the hot air flow cleans the surface of the platform body 2 by blowing;

[0064] After the hot gas in the air storage chamber 31 is discharged, the hot gas in the air storage chamber 31 is discharged outward, and the internal pressure of the air storage chamber 31 becomes low, and the return spring 321 pushes the piston member 32 to move inward, and the scraper 41 also moves inward. After the scraper 41 moves inward, the top plate 48 contacts the protrusion at the end of the movable plate 44 and pushes the movable plate 44 to move, so that the follower 45 in the movable plate 44 is separated from the paddle plate 46, and the paddle plate 46 is no longer restrained. The spring member 43 pushes the scraper 41 to move quickly, and the scraper 41 moves to the surface of the platform body 2 under the push of the spring member 43 and the inertial force, and the platform body 2 is scraped and cleaned. Because the piston member 32 is affected by the internal pressure of the air storage chamber 31, its inward movement speed is slower than the movement speed of the scraper 41. Therefore, before the gas in the air storage chamber 31 is completely discharged, the scraper 41 has already contacted with the platform body 2, thereby realizing the functions of scraping and cleaning and blowing and brushing cleaning at the same time, so that the impurities scraped off by the scraper 41 can also be blown away, and the automatic cleaning effect is better;

[0065] After the hot air in the air storage chamber 31 is discharged, the surrounding low-temperature air automatically enters the air storage chamber 31 through the gap to complete the automatic replenishment;

[0066] The lifting plate 36 is moved up and reset to drive the air storage chamber 31 and the rotating shaft 33 to rotate to the initial state, and the cycle is repeated for repeated use. During the operation of the heating platform, the heat dissipated during cooling is recycled to preheat and clean the platform body 2, which not only reduces the preheating time and improves the preheating efficiency, but also improves the situation where heat energy is wasted, reduces the working time and energy consumption of the electric heating unit, and saves the cost of use. At the same time, only the movement of the lifting plate 36 is controlled to complete the preheating and cleaning work, eliminating the trouble of setting up multiple sets of electrical drive systems. It has a high degree of automation and is suitable for assembly line production.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A 3D printing electric heating platform, comprising a support (1) and a platform body (2), wherein the platform body (2) is provided with an electric heating unit, characterized in that: It also includes a preheating auxiliary mechanism (3), wherein the preheating auxiliary mechanism (3) includes: A plurality of air storage chambers (31) rotatably arranged on the support (1), the air storage chamber (31) being a heat-insulating chamber, one side of the air storage chamber (31) being provided with an opening (311), the opening (311) facing the platform body (2); a piston member (32) movably inserted into the gas storage chamber (31), the piston member (32) being provided with a return spring (321), so that after the piston member (32) moves inward, the gas in the gas storage chamber (31) is discharged through the opening (311) and blown onto the platform body (2); Rotating a rotating shaft (33) disposed at the opening (311); a heat insulating plate (34) and a heat conducting plate (35) fixedly connected to the rotating shaft (33); after the rotating shaft (33) rotates, the opening (311) is sealed by one of the heat insulating plate (34) and the heat conducting plate (35); The preheating auxiliary mechanism (3) further comprises: A lifting plate (36) slidably arranged on the support (1); A first gear (312) fixedly connected to the air storage chamber (31), the lifting plate (36) being meshingly connected to the first gear (312); The preheating auxiliary mechanism (3) further comprises: A second gear (331) fixedly connected to the rotating shaft (33); an arc-shaped toothed plate (37) fixedly connected to the support (1), the arc-shaped toothed plate (37) being coaxial with the air storage chamber (31), and during the rotation of the air storage chamber (31), the arc-shaped toothed plate (37) and the second gear (331) are in meshing transmission after contact, thereby driving the rotating shaft (33) to rotate; It also includes a cleaning mechanism (4), wherein the cleaning mechanism (4) includes: A scraper (41) is slidably arranged outside the air storage chamber (31), and after the air storage chamber (31) rotates to above the platform body (2), the scraper (41) moves to scrape and clean the surface of the platform body (2); A telescopic rod (42), wherein two ends of the telescopic rod (42) are respectively connected to the scraper (41) and the air storage chamber (31); A spring member (43), wherein two ends of the spring member (43) are respectively connected to the scraper (41) and the air storage chamber (31).

2. A 3D printing electric heating platform according to claim 1, characterized in that: The heat insulation plate (34) is in the shape of an arc concentric with the rotating shaft (33); the heat conduction plate (35) is in the shape of a flat plate; and a gap is left between the heat insulation plate (34) and the heat conduction plate (35).

3. A 3D printing electric heating platform according to claim 1, characterized in that: The cleaning mechanism (4) further comprises: A movable plate (44) slidably disposed on the scraper (41); Rotating a driven member (45) disposed on the movable plate (44), wherein the driven member (45) is a unidirectional rotating structure; A shift plate (46) is fixedly connected to the piston member (32). After the piston member (32) moves outward, the shift plate (46) is pushed to move in one direction by the shift plate (46), thereby driving the scraper (41) away from the platform body (2).

4. A 3D printing electric heating platform according to claim 3, characterized in that: The cleaning mechanism (4) further comprises: A push spring (47) provided on the scraper (41) and used for driving the movable plate (44) to align with the shifting plate (46); A top plate (48) disposed on the air storage chamber (31) is rotated, wherein the top plate (48) is a one-way rotating structure, and an end of the top plate (48) is provided with a slope for pushing the movable plate (44) to move, and the movable plate (44) is staggered with the shifting plate (46) after movement.

5. A 3D printing electric heating platform according to claim 4, characterized in that: A protrusion corresponding to the top plate (48) is provided at the end of the movable plate (44); the movable plate (44) is located outside the air storage chamber (31); and the movable plate (44) and the piston member (32) are staggered.

6. A 3D printer, which uses a 3D printing electric heating platform according to any one of claims 1 to 5, characterized in that: It comprises a frame (5) and a 3D printing electric heating platform, wherein a 3D printing head (6) is movably provided on the frame (5), and the 3D printing head (6) is located above the platform body (2).

7. A 3D printer according to claim 6, characterized in that: The platform body (2) is detachably mounted on the support (1).

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