3D printing equipment

Abstract

The present invention relates to the technical field of 3D printing, and discloses a 3D printing device, including a housing, a wire feeding mechanism, a transmission mechanism, a spraying mechanism and a printing platform, the printing platform includes a base frame and a chain sprocket mechanism, the chain sprocket mechanism includes a first chain sprocket mechanism and a second chain sprocket mechanism arranged in parallel, the first chain and the second chain are both located on the upper part in a taut state, the first chain is located on the lower part in a relaxed state, the first driving wheel and the second driving wheel are fixedly connected by a first rotating shaft, the first driven wheel and the second driven wheel are fixedly connected by a second rotating shaft, the second rotating shaft is rotatably connected to the side wall of the base frame, the first chain and the second chain are fixedly connected by a horizontal plate, and a first gap is set between the horizontal plates; a plurality of card blocks that can be matched with the first gap are provided in the base frame, and a driving mechanism for controlling the up and down movement of the card blocks is provided in the base frame. The present invention facilitates the peeling of products and reduces damage to the products themselves.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to 3D printing equipment. Background Art

[0002] 3D printing, also known as three-dimensional printing, is a technology that uses a digital model file as the basis, uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. 3D printing technology is often used to make models in the fields of mold manufacturing, industrial design, etc., and then gradually used for the direct manufacturing of some products. There are already parts printed using this technology. 3D printing is usually achieved by using a printer using digital technology materials. The current 3D printer includes a wire feeding mechanism, a transmission mechanism, a servo system, a heat dissipation mechanism, an extrusion mechanism and a printing platform. The printing platform is controlled by a hydraulic mechanism and moves up and down. At present, the existing 3D printers have the following problems: Now, most of them use an extrusion mechanism to spray the melted raw materials on the printing platform according to the set shape. After printing is completed, the printed product is manually peeled off, and a spatula or similar tool is usually used to cause varying degrees of damage to the product itself. In addition, the use of the above tools has certain safety hazards during operation. Summary of the invention

[0003] The present invention aims to provide a 3D printing device, which is convenient for peeling off products, reduces damage to the products themselves, and has relatively high operation safety.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a 3D printing device, comprising a casing, a wire feeding mechanism, a transmission mechanism, a spraying mechanism and a printing platform, the wire feeding mechanism is connected to the spraying mechanism, the transmission mechanism is arranged on the upper end surface of the casing, the spraying mechanism is connected to the transmission mechanism, the spraying mechanism is located directly above the printing platform, the printing platform comprises a base frame and a chain sprocket mechanism, the chain sprocket mechanism is rotatably arranged in the base frame, the chain sprocket mechanism comprises a first chain sprocket mechanism and a second chain sprocket mechanism arranged in parallel, the first chain sprocket mechanism comprises a first driving wheel, a first driven wheel and a first chain, the first driving wheel is connected to the first driven wheel through a first chain, the upper part of the first chain is in a taut state, the lower part of the first chain is in a relaxed state, the second chain sprocket mechanism comprises a second driving wheel The first and second driven wheels are connected by the second chain, the upper part of the second chain is in a taut state, and the lower part of the second chain is in a relaxed state. The first driving wheel and the second driving wheel are fixedly connected by a first rotating shaft, and the end of the first rotating shaft passes through the base frame, and the end of the first rotating shaft is connected to a first motor. The first driven wheel and the second driven wheel are fixedly connected by the second rotating shaft, and the second rotating shaft is rotatably connected to the side wall of the base frame. The first chain and the second chain are fixedly connected by horizontal plates, and the horizontal plates are evenly spaced, and a first gap is set between the horizontal plates; a plurality of blocks that can cooperate with the first gap are set in the base frame, and a driving mechanism for controlling the up and down movement of the blocks is set in the base frame, and a discharging plate inclined downward is set on one side of the first driven wheel on the base frame.

[0005] The principle of this scheme is: in actual application, first turn on the first motor, the first motor drives the first shaft to rotate clockwise, the first shaft drives the first driving wheel and the second driving wheel to rotate clockwise, because the top of the first chain and the second chain is in a taut state, so the first driving wheel and the second driving wheel respectively drive the first chain and the second chain to move in the direction of the air pump, so that the first driven wheel and the second driven wheel also rotate clockwise, until the multiple horizontal plates move to the bottom of the spraying mechanism, and then turn off the first motor. Turn on the driving mechanism, the driving mechanism drives the multiple card blocks to move upward, and the card blocks fill each first gap, so that the horizontal plate and the card blocks form a new horizontal plane. At this time, the raw wire is sent to the spraying mechanism through the wire feeding mechanism, heated and melted by the spraying mechanism, so that the wire forms a melted state, and the transmission mechanism is operated according to the predetermined shape of the product, so that the melted wire is sprayed on the horizontal plane formed by the horizontal plate and the card blocks, and the printing is completed. After the product cools down for a period of time, the drive mechanism is turned on, and the drive mechanism drives multiple blocks to move downward, and the blocks are peeled off from the lower surface of the product. Then the first motor is turned on, and the first motor drives the first shaft to rotate counterclockwise, and the first shaft drives the first driving wheel and the second driving wheel to rotate counterclockwise. Since the bottom of the first chain and the second chain is in a relaxed state in the initial state, the first driving wheel and the second driving wheel drive the lower part of the first chain and the second chain to rotate counterclockwise, so that the bottom of the first chain and the second chain is in a taut state, and the top of the first chain and the second chain is in a relaxed state, which will drive the first driven wheel and the second driven wheel to rotate counterclockwise. In this way, when the distance between the first driving wheel and the first driven wheel is constant, in order to maintain the transmission of force, the first chain will be partially deformed and arched upward to each other. At the same time, consistent with the above principle, the second chain will also be partially deformed and arched to each other, so that the horizontal plates will also arch upward to each other, and the bottom of the product will be peeled off from the upper surface of the horizontal plate. When the product is conveyed to the edge of the first driven wheel, the product slides along the discharge plate and the product is separated from the printing platform.

[0006] Beneficial effects:

[0007] 1. In the present invention, two chain sprocket mechanisms are arranged in parallel and then driven coaxially, the first chain and the second chain are connected by a horizontal plate, a gap is set between the horizontal plates, and the initial state of the first chain and the second chain above is set to be a taut state, and the initial state of the first chain and the second chain below is set to be a relaxed state. This chain sprocket mechanism is used to drive the forward and reverse states to switch through the first motor, so as to achieve easy peeling of the product and the platform. This peeling method will not cause great damage to the bottom of the product, and there is no need to manually pick up the product, and it is automatically transmitted to the receiving place.

[0008] 2. When the first motor drives the first driving wheel to rotate clockwise, there will be a first gap between the horizontal plates, which will be filled by the card block. When the product is sprayed, the card block will move downward first, so that multiple parts of the lower surface of the product are separated from the card block, and the other parts of the bottom of the product are evenly supported by the horizontal plate, thus realizing the rapid peeling of the product and the card block. When the first motor drives the first driving wheel to rotate counterclockwise, the upper part of the first chain will become relaxed. Since the distance between the first driving wheel and the first driven wheel is constant, and the length of the upper part of the first chain is greater than the distance between the first driving wheel and the first driven wheel, for this reason, the multiple hinge points of the first chain will transmit force to each other, thereby arching each other, so that multiple horizontal plates arch each other, so that the bottom of the product and the surface of the horizontal plate will produce multiple local peeling situations, and finally transmitted to the discharge plate. Through the combination of the above two local peeling methods, the peeling of the product and the platform is relatively easy, and the degree of peeling damage is reduced.

[0009] Preferably, the driving mechanism includes a cylinder and an air pump, the cylinder and the air pump are connected through a first air pipe, a trigger switch is provided on one side of the air pump, the cylinder includes a piston and a piston rod, the piston slides up and down along the side wall of the cylinder, the piston rod is fixedly connected to the upper end surface of the piston, the lower end surface of the piston is connected to the side wall of the cylinder through a first spring, a plurality of support rods are fixedly connected to the piston rod, the upper end of the support rod is fixedly connected to the lower end surface of the block, and a control mechanism for controlling the opening and closing of the air pump is provided in the base frame. The block can be controlled to reciprocate up and down through the cylinder driving mechanism, and the structure operates stably.

[0010] Preferably, the control mechanism includes a first bevel gear and a second bevel gear meshing with the first bevel gear, the first bevel gear is fixedly connected to the first rotating shaft, the second bevel gear is fixedly connected to the third rotating shaft, the third rotating shaft is perpendicular to the first rotating shaft, the end of the third rotating shaft away from the first rotating shaft is fixedly connected to the first gear, the first rack is meshed below the first gear, a sliding plate is fixedly connected below the first rack, a slide rail is provided at the bottom of the base, and the sliding plate moves along the slide rail toward the air pump direction.

[0011] When the first motor drives the first rotating shaft to rotate clockwise, the first rotating shaft will drive the first bevel gear to rotate clockwise, the second bevel gear will also rotate, and the first gear connected to it through the third rotating shaft will also rotate, so that the first gear drives the first rack to move toward the air pump, and the first rack drives the sliding plate to move along the slide rail toward the air pump until the end of the sliding plate contacts the trigger switch of the air pump, turning on the air pump. When the first motor drives the first rotating shaft to rotate counterclockwise, consistent with the above principle, the end of the sliding plate will separate from the trigger switch of the air pump, thereby turning off the air pump. The force driven by the first motor to drive the first rotating shaft is converted to control the opening and closing of the air pump. At the same time, since the distance between the sliding plate and the air pump is constant, the time for the block to move upward can be more accurately determined.

[0012] Preferably, the cross-sectional shape of the horizontal plate is an inverted trapezoid, and the cross-sectional shape of the clamp block is a trapezoid, so that it is convenient to guide the upward movement of the clamp block, so that the horizontal plate and the clamp block cooperate better.

[0013] Preferably, a connecting block is fixedly connected to the lower end surface of the horizontal plate, and the connecting block is fixedly connected to the side walls of the first chain and the second chain, so as to fix and support the horizontal plate and prevent the horizontal plate from affecting the movement of the first chain and the second chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an embodiment of a 3D printing device of the present invention;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure of the first chain, the second chain and the horizontal plate;

[0016] Figure 3 for Figure 1 A partial enlarged view of the middle A;

[0017] Figure 4 for Figure 1 A schematic diagram of the structure of the first driving wheel, the second driving wheel, the first motor, the first bevel gear, the second bevel gear, the third rotating shaft and the first gear;

[0018] Figure 5 for Figure 1 Schematic diagram of the structure of the cooperation among the air pump, the first gear, the first rack and the sliding plate. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below through specific embodiments:

[0020] The figure marks in the drawings of the specification include: housing 1, wire feeding mechanism 2, transmission mechanism 3, spraying mechanism 4, base frame 5, first driving wheel 6, first driven wheel 7, first chain 8, second driving wheel 9, second chain 10, first rotating shaft 11, first motor 12, first connecting plate 13, second connecting plate 14, horizontal plate 15, connecting block 16, clamping block 17, cylinder 18, air pump 19, first air pipe 20, trigger switch 21, piston 22, piston rod 23, support rod 24, first spring 25, first bevel gear 26, second bevel gear 27, third rotating shaft 28, first gear 29, first rack 30, sliding plate 31, discharge plate 32.

[0021] Implementation example Figure 1 , Figure 2 and Figure 3 As shown: 3D printing equipment, including a housing 1, a wire feeding mechanism 2, a transmission mechanism 3, a spraying mechanism 4 and a printing platform, the wire feeding mechanism 2 is bolted to the spraying mechanism 4, the transmission mechanism 3 is arranged on the upper end surface of the housing 1, the spraying mechanism 4 is connected to the transmission mechanism 3, and the spraying mechanism 4 is located directly above the printing platform. The printing platform includes a base frame 5 and a chain sprocket mechanism, the chain sprocket mechanism is rotatably arranged in the base frame 5, the chain sprocket mechanism includes a first chain sprocket mechanism and a second chain sprocket mechanism arranged in parallel, the first chain sprocket mechanism includes a first driving wheel 6, a first driven wheel 7 and a first chain 8, the first driving wheel 6 and the first driven wheel 7 are connected by a first chain 8, the upper part of the first chain 8 is in a taut state, and the lower part of the first chain 8 is in a relaxed state, the second chain sprocket mechanism includes a second driving wheel 9, a second driven wheel 9, and a second driven wheel 9. (not shown in the figure) and the second chain 10, the second driving wheel 9 is connected to the second driven wheel through the second chain 10, the upper part of the second chain 10 is in a taut state, and the lower part of the second chain 10 is in a relaxed state, the first driving wheel 6 and the second driving wheel 9 are connected by a first rotating shaft 11 key, the end of the first rotating shaft 11 passes through the base frame 5, and the end of the first rotating shaft 11 is connected to the first motor 12, the first driven wheel 7 and the second driven wheel are connected by a second rotating shaft key, and the second rotating shaft is rotatably connected to the side wall of the base frame 5. The first chain 8 and the second chain 10 both include a plurality of cylindrical groups, the cylindrical group includes two cylindrical rods, the two sides of the two cylindrical rods are respectively hinged by a first connecting piece 13, and the plurality of first connecting pieces 13 are hinged by a second connecting piece 14. The first chain 8 and the second chain 10 are fixedly connected by a horizontal plate 15 . The horizontal plates 15 are evenly spaced with a first gap between them. A connecting block 16 is welded to the lower end surface of the horizontal plate 15 , and the connecting block 16 is welded to the upper end surface of the second connecting piece 14 .

[0022] like Figure 1 , Figure 4 and Figure 5As shown, three blocks 17 that can match the first gap are provided in the base frame 5, the cross-sectional shape of the horizontal plate 15 is an inverted trapezoid, and the cross-sectional shape of the block 17 is a trapezoid. A driving mechanism is provided in the base frame 5, and a discharging plate 32 inclined downward is provided on the side of the driven wheel on the base frame 5. The driving mechanism includes a cylinder 18 and an air pump 19, and the cylinder 18 is connected to the air pump 19 through a first air pipe 20. A trigger switch 21 is provided on one side of the air pump 19. The cylinder 18 includes a piston 22 and a piston rod 23. The piston 22 slides up and down along the side wall of the cylinder 18. The piston rod 23 is welded to the upper end face of the piston 22. The lower end face of the piston 22 is connected to the side wall of the cylinder 18 through a first spring 25. Three support rods 24 are welded on the piston rod 23, and the upper end of the support rod 24 is welded to the lower end face of the block 17. A control mechanism is arranged in the base frame 5, and the control mechanism includes a first bevel gear 26 and a second bevel gear 27 meshing with the first bevel gear 26. The first bevel gear 26 is keyed to the first rotating shaft 11, and the second bevel gear 27 is keyed to the third rotating shaft 28. The third rotating shaft 28 is perpendicular to the first rotating shaft 11, and the right end of the third rotating shaft 28 is keyed to the first gear 29. A first rack 30 is meshed below the first gear 29, and a sliding plate 31 is bolted to the bottom of the first rack 30. A slide rail is arranged at the bottom of the base frame 5, and the sliding plate 31 moves along the slide rail toward the air pump 19.

[0023] In actual application, first turn on the first motor 12, the first motor 12 drives the first rotating shaft 11 to rotate clockwise, and the first rotating shaft 11 drives the first driving wheel 6 and the second driving wheel 9 to rotate clockwise. Since the top of the first chain 8 and the second chain 10 are in a taut state, the first driving wheel 6 and the second driving wheel 9 respectively drive the first chain 8 and the second chain 10 to move toward the air pump 19, so that the first driven wheel 7 and the second driven wheel also rotate clockwise, until the multiple horizontal plates 15 move to the bottom of the spraying mechanism 4, and then turn off the first motor 12. When the first motor 12 drives the first rotating shaft 11 to rotate clockwise, the first rotating shaft 11 will drive the first bevel gear 26 to rotate clockwise, the second bevel gear 27 will also rotate, and the first gear 29 connected to it through the third rotating shaft 28 will also rotate, so that the first gear 29 drives the first rack 30 to move toward the air pump 19, and the first rack 30 drives the sliding plate 31 to move along the slide rail toward the air pump 19 until the end of the sliding plate 31 abuts against the trigger switch 21 of the air pump 19, turning on the air pump 19. The rotor in the air pump 19 rotates forward, and the air pump 19 inflates the cylinder 18, so that the first spring 25 is stretched and deformed, and the piston 22 moves upward under the push of the gas, and the piston 22 pushes the piston rod 23 to move upward, thereby pushing the block 17 through the support rod 24 to fill the first gap, so that the horizontal plate 15 and the block 17 form a new horizontal plane. At this time, the raw wire is sent to the spraying mechanism 4 through the wire feeding mechanism 2, and is heated and melted by the spraying mechanism 4, so that the wire is in a melted state, and is operated according to the predetermined shape of the product through the transmission mechanism 3, so that the melted wire is sprayed on the horizontal plane formed by the horizontal plate 15 and the block 17, and the printing is completed. After the product cools down for a period of time, the first motor 12 is turned on, and when the first motor 12 drives the first rotating shaft 11 to rotate counterclockwise, consistent with the above principle, the end of the sliding plate 31 will separate from the trigger switch 21 of the air pump 19, thereby turning off the air pump 19. The first spring 25 returns to its original position, the first spring 25 drives the piston 22 to move downward, the piston 22 drives the piston rod 23 to move downward, the piston rod 23 drives the block 17 to move downward through the support rod 24, and the block 17 is peeled off from the lower surface of the product. At the same time, the first motor 12 drives the first rotating shaft 11 to rotate counterclockwise, and the first rotating shaft 11 drives the first driving wheel 6 and the second driving wheel 9 to rotate counterclockwise. In the initial state, the bottom of the first chain 8 and the second chain 10 are in a relaxed state. In this way, the first driving wheel 6 and the second driving wheel 9 drive the lower part of the first chain 8 and the second chain 10 to rotate counterclockwise. In this way, the bottom of the first chain 8 and the second chain 10 are in a taut state, and the top of the first chain 8 and the second chain 10 are in a relaxed state, which will drive the first driven wheel 7 and the second driven wheel to rotate counterclockwise.In this way, when the distance between the first driving wheel 6 and the first driven wheel 7 is constant, in order to maintain the transmission of force, the first chain 8 will be partially deformed and arched upwards. At the same time, consistent with the above principle, the second chain 10 will also be partially deformed and arched upwards, so that the horizontal plates 15 will also arch upwards, and the bottom of the product will be peeled off from the upper surface of the horizontal plate 15. When the product is conveyed to the edge of the first driven wheel 7, the product slides along the discharge plate and the product is separated from the printing platform.

[0024] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A 3D printing device, comprising a housing, a wire feeding mechanism, a transmission mechanism, a spraying mechanism and a printing platform, wherein the wire feeding mechanism is connected to the spraying mechanism, the transmission mechanism is arranged on the upper end surface of the housing, the spraying mechanism is connected to the transmission mechanism, and the spraying mechanism is located directly above the printing platform, characterized in that: The printing platform includes a base frame and a chain sprocket mechanism, the chain sprocket mechanism is rotatably arranged in the base frame, the chain sprocket mechanism includes a first chain sprocket mechanism and a second chain sprocket mechanism arranged in parallel, the first chain sprocket mechanism includes a first driving wheel, a first driven wheel and a first chain, the first driving wheel is connected to the first driven wheel through a first chain, the upper part of the first chain is in a taut state, and the lower part of the first chain is in a slack state, the second chain sprocket mechanism includes a second driving wheel, a second driven wheel and a second chain, the second driving wheel is connected to the second driven wheel through a second chain, the upper part of the second chain is in a taut state, and the lower part of the first chain is in a slack state. The lower part of the two chains is in a relaxed state, the first driving wheel and the second driving wheel are fixedly connected by a first rotating shaft, the end of the first rotating shaft passes through the base frame, and the end of the first rotating shaft is connected to a first motor, the first driven wheel and the second driven wheel are fixedly connected by a second rotating shaft, the second rotating shaft is rotatably connected to the side wall of the base frame, the first chain and the second chain are fixedly connected by horizontal plates, the horizontal plates are evenly spaced, and a first gap is set between the horizontal plates; a plurality of blocks that can cooperate with the first gap are provided in the base frame, a driving mechanism for controlling the up and down movement of the blocks is provided in the base frame, and a discharging plate inclined downward is provided on one side of the first driven wheel on the base frame; The cross-sectional shape of the horizontal plate is an inverted trapezoid, and the cross-sectional shape of the clamping block is a trapezoid.

2. The 3D printing device according to claim 1, characterized in that: The driving mechanism includes a cylinder and an air pump, the cylinder and the air pump are connected by a first air pipe, a trigger switch is arranged on one side of the air pump, the cylinder includes a piston and a piston rod, the piston slides up and down along the side wall of the cylinder, the piston rod is fixedly connected to the upper end surface of the piston, the lower end surface of the piston is connected to the side wall of the cylinder by a first spring, a plurality of support rods are fixedly connected to the piston rod, the upper ends of the support rods are fixedly connected to the lower end surface of the block; a control mechanism for controlling the opening and closing of the air pump is arranged in the base frame.

3. The 3D printing device according to claim 1, characterized in that: The control mechanism includes a first bevel gear and a second bevel gear meshing with the first bevel gear, the first bevel gear is fixedly connected to the first rotating shaft, the second bevel gear is fixedly connected to the third rotating shaft, the third rotating shaft is perpendicular to the first rotating shaft, the end of the third rotating shaft away from the first rotating shaft is fixedly connected to the first gear, a first rack is meshed below the first gear, a sliding plate is fixedly connected below the first rack, a slide rail is provided at the bottom of the base, and the sliding plate moves toward the air pump along the slide rail.

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