3D printing silicon carbide forming mold structure

Abstract

The utility model relates to the field of dies, in particular to a 3D printing silicon carbide forming die structure which is characterized in that a bearing plate is arranged on a supporting table, a 3D printing female die is fixedly installed on the top of the bearing plate, and a 3D printing male die driven by a power device to ascend and descend is installed on a rack located above the 3D printing female die; a through groove vertically penetrating through the supporting table is formed in the supporting table, a supporting block is fixedly installed on the side wall of the through groove, a supporting spring is connected between the supporting block and the bearing plate, and a vibration motor is installed at the bottom, corresponding to the through groove, of the bearing plate; the bearing plate is a metal bearing plate, and an electromagnet used for attracting the bearing plate is fixedly installed on the supporting table. When no external force exists, the supporting force of the supporting springs on the bearing plate enables the bottom of the bearing plate to be separated from the supporting table upwards, after the silicon carbide raw materials are added into the 3D printing female die, the vibration motor can be started to drive the bearing plate and the 3D printing female die on the top of the bearing plate to vibrate, and therefore the silicon carbide raw materials are efficiently and evenly distributed in the 3D printing female die.

Description

Technical Field

[0001] The utility model relates to the field of molds, and in particular to a 3D printing silicon carbide forming mold structure. Background Art

[0002] Silicon carbide ceramics are a type of ceramic with silicon carbide as its main component. Before sintering silicon carbide ceramic products, the silicon carbide raw materials must first be pressed into shape.

[0003] In the prior art, a utility model patent application numbered CN221186920U discloses a device for isostatically pressing silicon carbide ceramic products. The outer surface of a ceramic forming table is fixedly connected to a support frame, an isostatically pressing ceramic die is provided on the upper surface of the ceramic forming table, and an isostatically pressing vibration device is provided on the lower surface of the ceramic forming table. This isostatically pressing silicon carbide ceramic product device can impact the ceramic forming table via an impact block. When the impact force is transmitted to the isostatically pressing ceramic die, the raw material in the isostatically pressing ceramic die is evenly distributed within the isostatically pressing ceramic die, thereby avoiding bubbles in the molded part due to uneven distribution of raw materials during isostatic pressing of silicon carbide ceramics, as well as other adverse factors caused by uneven distribution.

[0004] However, due to the rigid fixation between the ceramic forming table and the support frame, the vibration amplitude of the ceramic die is small when the impact block hits the ceramic forming table, and thus the raw materials cannot be efficiently distributed evenly in the equalizing pressure ceramic die, which needs to be improved. Utility Model Content

[0005] The purpose of the present utility model is to provide a 3D printed silicon carbide forming mold structure, by arranging a support spring and a vibration motor at the bottom of the 3D printed die so as to efficiently and evenly distribute the silicon carbide raw material in the 3D printed die, thereby solving the defects raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The 3D printing silicon carbide forming mold structure includes a frame, the frame is provided with a support platform, the support platform is provided with a carrying plate, the top of the carrying plate is fixedly installed with a 3D printing die, and the frame above the 3D printing die is installed with a 3D printing punch driven to rise and fall by a power device; a vertical through-groove is provided on the support platform, a support block is fixedly installed on the side wall of the through-groove, a support spring is connected between the support block and the carrying plate, and a vibration motor is installed at the bottom of the carrying plate corresponding to the position of the through-groove; the carrying plate is a metal carrying plate, and an electromagnet for adsorbing the carrying plate is fixedly installed on the support platform; a vertically extending positioning pin is fixedly installed on the bottom of the carrying plate, and a positioning groove for inserting the positioning pin is provided on the support platform.

[0008] As a preferred technical solution, the lower end of the positioning pin is in an inverted cone shape, and the shape of the positioning groove matches that of the positioning pin.

[0009] As an optimal technical solution, a support plate for ejecting the formed product is provided in the 3D printing die, a movable column extending downward is fixedly installed at the bottom of the support plate, the bottom of the 3D printing die and the supporting plate are provided with holes for the movable column to pass through, a counterweight plate is fixedly installed at the lower end of the movable column, and a bottom cylinder for lifting the counterweight plate is installed on the frame located below the counterweight plate, and the piston rod of the bottom cylinder extends vertically upward and faces the bottom of the counterweight plate.

[0010] As a preferred technical solution, a guide rail is fixedly installed at the bottom of the supporting plate corresponding to the position of the through slot, and the guide rail extends radially along the movable column, and a slider is slidably installed on the guide rail, and a clamping block is fixedly installed on one side of the slider, and a slot for the clamping block to be clamped is provided on the outer wall of the movable column, and a spring telescopic rod for driving the clamping block to be clamped into the slot is connected between the support plate and the slider; a wedge block is fixedly installed in the through slot located below the slider, and the top of the wedge block is provided with an inclined guide slope, and when the supporting plate moves downward, the guide slope acts on the lower end of the slider and causes the slider to move in a direction away from the movable column.

[0011] As a preferred technical solution, the lower end of the sliding block is provided with an abutment surface that matches the guide inclined surface.

[0012] As a preferred technical solution, the 3D printing concave mold and the 3D printing convex mold are both made by 3D printing.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. When there is no external force, the support force of the support spring on the carrier plate causes the bottom of the carrier plate to separate upward from the support platform. After the silicon carbide raw material is added to the 3D printing die, the vibration motor can be started to drive the carrier plate and the 3D printing die on top to vibrate, thereby efficiently distributing the silicon carbide raw material evenly in the 3D printing die.

[0015] 2. After the silicon carbide raw material is evenly distributed in the 3D printing die, the vibration motor is turned off and the electromagnet is energized. The electromagnet attracts the carrier plate to move downward and makes the carrier plate close to the top of the support table, thereby providing stable support for the carrier plate and the 3D printing die through the support table, improving the stability of the silicon carbide product during the pressing process;

[0016] 3. After the 3D printing punch presses the silicon carbide raw material downward to form it, the bottom cylinder can be used to lift the counterweight plate upward. Then, the counterweight plate drives the support plate to move upward relative to the 3D printing die through the movable column, so as to eject the product formed in the 3D printing die.

[0017] 4. When the electromagnet is powered off, the support spring pushes the carrier plate off the support platform. At the same time, the carrier plate drives the slider to move upward to separate from the wedge block. Then, driven by the spring telescopic rod, the card block is inserted into the card slot to limit the vertical movement of the movable column and the support plate, preventing the silicon carbide raw material from entering the bottom of the support plate when the vibration motor drives the 3D printing die to vibrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A partial cross-sectional schematic diagram;

[0021] Figure 3 yes Figure 2 A partial enlarged view of part I;

[0022] Figure 4 This is a schematic diagram of an embodiment of the present invention when the load-bearing plate iron is attached to the top of the support platform.

[0023] In the figure: 1-frame; 2-support table; 3-carrying plate; 4-3D printing die; 5-3D printing punch; 6-top plate; 7-top cylinder; 8-through slot; 9-support block; 10-support spring; 11-vibration motor; 12-electromagnet; 13-locating pin; 14-locating slot; 15-support plate; 16-movable column; 17-hole; 18-counterweight plate; 19-bottom cylinder; 20-bottom plate; 21-guide rail; 22-slider; 23-block; 24-slot; 25-support plate; 26-spring telescopic rod; 27-wedge block; 28-guide slope; 29-butt surface. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figures 1 to 4 As shown, the 3D printing silicon carbide forming mold structure includes a frame 1, which is provided with a support platform 2, and a bearing plate 3 is provided on the top of the support platform 2. A 3D printing die 4 is fixedly installed on the top of the bearing plate 3 by bolts. A 3D printing punch 5 driven by a power device is installed on the frame 1 above the 3D printing die 4. The frame 1 above the support platform 2 is provided with a top plate 6. The power device is specifically a top cylinder 7 with a piston rod extending downward. The cylinder body of the top cylinder 7 is fixedly installed on the top plate 6 by bolts, and the 3D printing punch 5 is fixedly installed on the piston rod of the top cylinder 7 by bolts. When in use, silicon carbide raw material is added to the 3D printing die 4, and the top cylinder 7 extends to drive the 3D printing punch 5 to move downward, and then the 3D printing punch 5 cooperates with the 3D printing die 4 to press the silicon carbide raw material into shape.

[0026] The shapes of the 3D printing concave mold 4 and the 3D printing punch 5 can be set specifically according to the shape of the product to be processed, and the 3D printing concave mold 4 and the 3D printing punch 5 are both manufactured using 3D printing technology, which has the advantages of short mold development cycle and low manufacturing cost.

[0027] A through slot 8 is provided vertically through the support platform 2 located below the supporting plate 3. Support blocks 9 are fixedly installed on the left and right side walls of the through slot 8 by bolts. A support spring 10 is connected between the support block 9 and the supporting plate 3. The two ends of the support spring 10 can be fixedly connected to the support block 9 and the supporting plate 3 by welding or bolts. A vibration motor 11 is installed at the bottom center of the supporting plate 3 corresponding to the position of the through slot 8 by bolts. When there is no external force, such as Figure 1 and Figure 2 As shown, the supporting force of the support spring 10 on the supporting plate 3 causes the bottom of the supporting plate 3 to separate upward from the supporting platform 2. After the silicon carbide raw material is added to the 3D printing die 4, the vibration motor 11 can be started to drive the supporting plate 3 and the 3D printing die 4 on top of it to vibrate, thereby efficiently distributing the silicon carbide raw material evenly in the 3D printing die 4.

[0028] The carrier plate 3 is made of metal. The top of the support platform 2, located on the left and right sides of the through-slot 8, is provided with recessed slots. Electromagnets 12, which hold the carrier plate 3 in place, are embedded in these recesses or bolted into place. Once the silicon carbide raw material is evenly distributed within the 3D printing die 4, the vibration motor 11 is turned off and the electromagnets 12 are energized. These electromagnets attract the carrier plate 3 downward, pressing it against the top of the support platform 2. This provides stable support for the carrier plate 3 and the 3D printing die 4, enhancing the stability of the silicon carbide product during the pressing process.

[0029] In addition, in order to facilitate the positioning of the carrier plate 3 and avoid the carrier plate 3 from being offset when it is attached downward to the top of the support platform 2, which causes the 3D printing die 4 and the 3D printing punch 5 to be misaligned, two vertically extending positioning pins 13 are welded to the bottom of the carrier plate 3 and are arranged opposite to each other on the left and right. A positioning groove 14 is provided on the support platform 2 for the positioning pin 13 to be inserted, and the lower end of the positioning pin 13 is in an inverted cone shape. The shape of the positioning groove 14 is consistent with the positioning pin 13, so that the positioning pin 13 can be accurately inserted into the corresponding positioning groove 14.

[0030] In order to facilitate the removal of the molded product from the 3D printing die 4, a support plate 15 for ejecting the molded product is provided in the 3D printing die 4. The inner side of the bottom wall of the 3D printing die 4 is provided with a groove for the support plate 15 to sink into. When the silicon carbide product is pressed, the top of the support plate 15 and the bottom wall of the 3D printing die 4 cooperate to form the bottom of the silicon carbide product. A downward extending movable column 16 is welded to the bottom of the support plate 15, and two movable columns 16 are arranged opposite to each other on the left and right. Holes 17 for the movable columns 16 to pass through are provided on the bottom of the 3D printing die 4 and the supporting plate 3. The movable columns 16 pass downward through the 3D printing die 4, the supporting plate 3 and the through slot 8 in turn. A counterweight plate 18 is fixedly installed on the lower ends of the two movable columns 16 by bolts. A bottom cylinder 19 for lifting the counterweight plate 18 is installed on the frame 1 located below the counterweight plate 18. A bottom plate 20 is provided on the frame 1 located below the support platform 2. The cylinder body of the bottom cylinder 19 is fixedly installed on the bottom plate 20 by bolts, and the piston rod of the bottom cylinder 19 extends vertically upward and faces the bottom of the counterweight plate 18.

[0031] After the 3D printing punch 5 presses the silicon carbide raw material downward to form it, the top cylinder 7 first contracts to drive the 3D printing punch 5 to move up and return to its original position, and then the bottom cylinder 19 extends to make its piston rod move upward. When the piston rod of the bottom cylinder 19 contacts the bottom of the counterweight plate 18 upward, the support plate 15 moves upward relative to the 3D printing die 4 under the push of the bottom cylinder 19 and ejects the product formed in the 3D printing die 4.

[0032] like Figure 2 and Figure 3As shown, a guide rail 21 is fixedly installed at the bottom of the bearing plate 3 corresponding to the position of the through slot 8. The guide rail 21 corresponds to the movable column 16 one by one. The guide rail 21 extends along the radial direction of the corresponding movable column 16. A slider 22 is slidably installed on the guide rail 21. A clamping block 23 is welded on the side of the slider 22 close to the corresponding movable column 16. A clamping groove 24 for the clamping block 23 to be clamped is provided on the outer wall of the movable column 16. A support plate 25 is fixedly installed on the end of the guide rail 21 away from the corresponding movable column 16 by bolts. The support plate 25 is fixed to the corresponding movable column 16. A spring telescopic rod 26 is connected between the sliders 22 for driving the card block 23 to snap into the corresponding card slot 24. The two ends of the spring telescopic rod 26 are fixedly connected to the support plate 25 and the slider 22 by bolts respectively; wedge blocks 27 are fixedly installed in the through slots 8 below the two sliders 22 by bolts respectively, and the top of the wedge block 27 is provided with an inclined guide slope 28. When the supporting plate 3 moves downward, the guide slope 28 acts on the lower end of the corresponding slider 22 and causes the slider 22 to move away from the movable column 16.

[0033] Specifically, when the electromagnet 12 is powered off, the support spring 10 pushes the carrier plate 3 off the support platform 2, firstly, the silicon carbide raw material is added into the 3D printing die 4, and then the vibration motor 11 can be started to drive the carrier plate 3 and the 3D printing die 4 on top of it to vibrate; while the carrier plate 3 is upwardly separated from the support platform 2, as shown in FIG. Figure 2 and Figure 3 As shown, the supporting plate 3 drives the slider 22 to move upward and causes the lower end of the slider 22 to separate from the guide slope 28 on the top of the wedge block 27. The spring telescopic rod 26 extends and pushes the slider 22 to move along the guide rail 21 toward the movable column 16. The slider 22 drives the block 23 to be clamped into the slot 24 on the side of the movable column 16, thereby limiting the vertical movement of the movable column 16, and then making the support plate 15 close to the inner side of the bottom wall of the 3D printing die 4, to prevent the silicon carbide raw material from entering the bottom of the support plate 15 when the vibration motor 11 drives the 3D printing die 4 to vibrate.

[0034] After the silicon carbide raw material is evenly distributed in the 3D printing die, the electromagnet 12 is energized and the carrier plate 3 is attracted downward and pressed against the top of the support table 2, and then the 3D printing punch 5 moves downward to press the silicon carbide raw material into shape; when the electromagnet 12 attracts the carrier plate 3 and moves downward, when the carrier plate 3 drives the slider 22 downward to hit the guide slope 28 at the top of the wedge block 27, the guide slope 28 acts on the lower end of the corresponding slider 22 and moves the slider 22 away from the movable column 16, and then the slider 22 drives the block 23 to separate from the movable column 16, as shown in FIG. Figure 4 As shown, the restriction on the vertical movement of the movable column 16 and the supporting plate 15 is released, so that after the silicon carbide product is pressed and formed, the formed product can be ejected by the upward movement of the supporting plate 15.

[0035] In addition, in order to improve the stability of the contact between the lower end of the slider 22 and the guide inclined surface 28 , the lower end of the slider 22 is provided with an abutment surface 29 that matches the guide inclined surface 28 .

[0036] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements 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. 3D printing silicon carbide molding die structure, characterized by: The machine comprises a frame, the frame is provided with a support platform, the support platform is provided with a carrying plate, a 3D printing die is fixedly installed on the top of the carrying plate, and a 3D printing punch driven to rise and fall by a power device is installed on the frame above the 3D printing die; a vertical through-groove is provided on the support platform, a support block is fixedly installed on the side wall of the through-groove, a support spring is connected between the support block and the carrying plate, and a vibration motor is installed at the bottom of the carrying plate corresponding to the position of the through-groove; the carrying plate is a metal carrying plate, and an electromagnet for adsorbing the carrying plate is fixedly installed on the support platform; a vertically extending positioning pin is fixedly installed on the bottom of the carrying plate, and a positioning groove for inserting the positioning pin is provided on the support platform.

2. The 3D printing silicon carbide forming mold structure according to claim 1, wherein: The lower end of the positioning pin is in an inverted cone shape, and the shape of the positioning groove matches that of the positioning pin.

3. The 3D printing silicon carbide forming mold structure according to claim 1, wherein: A support plate for ejecting the formed product is provided in the 3D printing die, a movable column extending downward is fixedly installed at the bottom of the support plate, holes for the movable column to pass through are provided on the bottom of the 3D printing die and the supporting plate, a counterweight plate is fixedly installed at the lower end of the movable column, a bottom cylinder for lifting the counterweight plate is installed on the frame located below the counterweight plate, and the piston rod of the bottom cylinder extends vertically upward and faces the bottom of the counterweight plate.

4. The 3D printing silicon carbide forming mold structure according to claim 3, wherein: The top of the wedge block is provided with an inclined guide surface, and when the bearing plate moves downward, the guide surface acts on the lower end of the slider and causes the slider to move in a direction away from the movable column.

5. The 3D printing silicon carbide forming mold structure according to claim 4, characterized in that: The lower end of the sliding block is provided with an abutting surface which matches the guiding inclined surface.

6. The 3D printing silicon carbide forming mold structure according to claim 1, wherein: The 3D printing concave mold and the 3D printing convex mold are both made by 3D printing.

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