CN115246219B - Automatic 3D printing apparatus of drawing of patterns - Google Patents

Abstract

The invention relates to the technical field of photocuring and additive processing, and discloses a 3D printing device for automatic demoulding, including a photosensitive resin carrier box for containing photosensitive resin, an outer box frame for fixing the outside of the photosensitive resin carrier box, A case cover hinged with one side of the outer case frame, and an LCD screen arranged under the case cover. This automatic demoulding 3D printing equipment, when printing the product, the right profiled plate and the left profiled plate are attached to each other to form a flat curing surface, so that the bottom of the product has a flat surface after curing on the right profiled plate and the left profiled plate Bottom surface, the molding quality is better. When the product is demolded after molding, the continuous movement of the threaded block after the telescopic rod is fully retracted and fully extended makes the right profiled plate and the left profiled plate detached from each other and around the rigid rod. Turn twice in the opposite direction to complete the secondary demoulding of the printed product, which has better demoulding effect, higher completeness of demoulding, and less damage to the bottom surface of the product during the demoulding process.

Description

A 3D printing device with automatic demoulding

technical field

The invention relates to the technical field of light-curing additive processing, in particular to a 3D printing device for automatic demoulding.

Background technique

Photosensitive resin refers to the liquid material used for photocuring and rapid prototyping. It is liquid in the dark state and is a common raw material for photopolymerization and additive processing printers. When exposed to ultraviolet light, the photosensitive reagent will cause the resin to undergo polymerization. Curing, so by irradiating different shapes of ultraviolet light spots on the photosensitive resin material, and then layer by layer, the desired product shape can be finally processed.

After the printed product is printed, it needs to be demolded from the solidified carrier. The existing Chinese utility model patent with the authorized announcement number CN214000591U discloses a vacuum demoulding printer, which processes the fixed carrier into a surface with several round holes. When the bushing plate moves down to the position where it touches the release pin, the pin is inserted into the round hole of the bushing to push the product upwards through the hole, forcing the product to separate from the bushing. But this kind of demoulding device has the following defects in use: the surface of the bushing has a lot of round holes, which will cause a part of the photosensitive resin to solidify in the round holes, and the molding quality of the bottom surface of the product is poor.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a 3D printing device with automatic demoulding, which has the advantages of being suitable for photocuring products to complete automatic demolding while the bottom of the product is flat, and solves the problem of existing photocuring 3D printers. The problem of poor molding quality of the product bottom surface of the automatic demoulding device.

In order to solve the above technical problems, the present invention provides the following technical solutions: a 3D printing device for automatic demoulding, comprising a photosensitive resin carrier box for containing photosensitive resin, an outer box frame for fixing the outside of the photosensitive resin carrier box, and One side hinged case cover of the outer box frame is arranged on the LCD screen under the case cover, and the upper four corners of the upper end of the photosensitive resin carrying case are fixedly provided with upper extension plates, and the bottom of the upper extension plates are all rotatably connected with screw rods. The outer frame of the outer box is fixed with a motor, and the motor is used to drive the screw to rotate through the transmission assembly. Each screw is screwed with a threaded block, and the threaded block is fixed on the side surface away from the inner wall of the photosensitive resin carrying box. A connection block is connected, the front side of the connection block is fixedly provided with a connection column, and the connection column is slidably connected in a herringbone guide groove, and the herringbone guide groove is opened on the front side of the outer matching block, and the The lower end of the outer matching block is welded with a triangle iron, the two triangle irons on the left end are fixedly connected to the left special-shaped plate at the end far away from the outer matching block, and the two triangle irons at the right end are fixedly connected to the right special-shaped plate at the end far away from the outer matching block. The center of the side of the right special-shaped plate and the left special-shaped plate are provided with a penetrating waist-shaped groove, and rigid struts are inserted into the waist-shaped grooves, and the two ends of the rigid struts are fixedly connected with connecting rings A telescopic rod is fixedly connected to the lower end of the outer peripheral surface of the connecting ring, and the telescopic rod is fixedly connected to the bottom of the photosensitive resin carrying case.

Preferably, the transmission assembly includes a first pulley, a second pulley and a third pulley, the first pulley is fixedly connected to the outer peripheral surface of each screw and is close to the bottom of the upper extension plate, the front end and the rear The two first pulleys at the end are respectively connected by belts, and the outer peripheral surfaces of the two screws at the rear end are fixedly provided with a second pulley below the first pulley, and the second pulley is connected to the third pulley. The pulley is connected with a belt, and the third pulley is fixedly connected to the outer output shaft of the motor.

Preferably, the upper side end of the photosensitive resin carrying case is provided with a notch, and the width of the notch is adapted to the width of the belt connected between the second pulley and the third pulley.

Preferably, each of the threaded blocks is in sliding contact with the inner wall of the photosensitive resin carrying case.

Preferably, the thickness of the right profiled plate and the left profiled plate are the same, and the length of each support plate of the right profiled plate and the left profiled plate is the same.

Preferably, there is a sliding gap distance between the side surface of the connecting block and the side surface of the right special-shaped plate, and the same sliding gap distance is left between the side surface of the connecting block and the side surface of the left special-shaped plate.

Compared with the prior art, the present invention provides a 3D printing device with automatic demoulding, which has the following beneficial effects:

1. The 3D printing equipment for automatic demoulding, when printing the product, the right profiled plate and the left profiled plate are attached to each other to form a flat curing surface, so that the bottom of the product is cured above the right profiled plate and the left profiled plate. Flat bottom surface, better molding quality.

2. The 3D printing equipment for automatic demoulding, when the product is demoulded after the product is formed, the thread block continues to move after the telescopic rod is fully contracted and fully extended, so that the right profiled plate and the left profiled plate are separated from each other and circled The rigid support rod rotates twice in the opposite direction to complete the secondary demoulding of the printed product, which has a better demoulding effect, a higher degree of demoulding integrity, and less damage to the bottom surface of the product during the demoulding process.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the present invention;

Fig. 2 is a schematic view of the top view structure of the present invention;

Fig. 3 is a schematic sectional view of A-A in Fig. 2;

Fig. 4 is the enlarged schematic view of the structure at B in Fig. 3;

Figure 5 is an enlarged schematic view of the structure at C in Figure 3;

Fig. 6 is a schematic diagram of laminating the right profiled plate and the left profiled plate in the present invention;

Figure 7 is an enlarged schematic view of the structure at D in Figure 6;

Figure 8 is a schematic diagram of the matching structure of the right special-shaped plate;

FIG. 9 is a schematic top view of the structure in FIG. 6 .

In the figure: 1. Photosensitive resin carrying box; 2. Case cover; 3. LCD screen; 4. Outer box frame; 5. Upper extension plate; 6. Screw; 7. First pulley; 8. Second pulley; 9. The third pulley; 10. Motor; 11. Notch; 12. Thread block; 13. Connecting block; 14. Right special-shaped plate; 15. Connecting column; 16. Herringbone guide groove; Left special-shaped plate; 19, waist-shaped groove; 20, rigid pole; 21, connecting ring; 22, expansion rod; 23, outer matching block.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-9, a 3D printing device for automatic demoulding, including a photosensitive resin carrier box 1 for containing photosensitive resin, an outer box frame 4 for fixing the outside of the photosensitive resin carrier box 1, and the outer box The case cover 2 hinged on one side of the frame 4 is arranged on the LCD screen 3 below the case cover 2, and the bottom of the case cover 2 is located on both sides of the LCD screen 3 with ultraviolet emitters for emitting ultraviolet light outwards, here In the prior art, without going into too much detail, the LCD screen 3 is mainly used to project ultraviolet light downward so that the photosensitive resin material at the corresponding position in the photosensitive resin carrying case 1 is cured on the upper surface of the right special-shaped plate 14 and the connecting column 15;

The four corners of the upper end of the photosensitive resin carrier box 1 are fixedly provided with an upper extension plate 5, and the bottom of the upper extension plate 5 is connected with a screw 6 for rotation, and a motor 10 is fixed on the outside of the outer box frame 4, and the motor 10 is used to drive the screw through the transmission assembly. 6 rotates, the transmission assembly includes a first pulley 7, a second pulley 8 and a third pulley 9, the first pulley 7 is fixedly connected to the outer peripheral surface of each screw 6 and is close to the bottom of the upper extension plate 5, the front end and The two first pulleys 7 at the rear end are respectively connected by a belt, and the outer peripheral surfaces of the two screw rods 6 at the rear end are fixedly provided with a second pulley 8 below the first pulley 7, and the second pulley 8 is connected to the first pulley 7. The 3rd pulley 9 belts are connected, and the 3rd pulley 9 is fixedly connected on the outer output shaft of motor 10, and the side upper end of photosensitive resin carrying case 1 is provided with notch 11, and the width of notch 11 is the same as that of second pulley 8 and The width of the belt connected between the third pulley 9 is compatible;

Each screw rod 6 is threadedly connected with a threaded block 12, and each threaded block 12 is in sliding contact with the inner wall of the photosensitive resin carrying case 1, and the inner wall of the photosensitive resin carrying case 1 is equivalent to limiting the movement of the threaded block 12, so that the screw thread The block 12 maintains a stable linear motion between up and down under the drive of the screw rod 6;

The side surface of the threaded block 12 away from the inner wall of the photosensitive resin carrying case 1 is fixedly connected with a connecting block 13, the side surface of the connecting block 13 and the side surface of the right special-shaped plate 14 leave a sliding gap distance, the side surface of the connecting block 13 and the left special-shaped plate There is a sliding gap distance of the same size between the side surfaces of 18, and the purpose of leaving the sliding gap distance is to adapt to the movement of the outer fitting block 23, so that the right profiled plate 14 and the left profiled plate 18 have an adapted gap To be able to separate from each other after the printing is completed and when the right profiled plate 14 and the left profiled plate 18 are moved to the maximum extension position of the telescopic rod 22;

The front side of the connection block 13 is fixedly provided with a connecting column 15, and the connecting column 15 is slidably connected in the herringbone guide groove 16. The shape of the herringbone guide groove 16 is as shown in the figure, which is equivalent to two circles symmetrical along the horizontal line. The arc grooves are spliced to form, and the herringbone guide groove 16 is opened on the front side of the outer fitting block 23, and the side lower end of the outer fitting block 23 is welded with a triangle iron 17, and the two triangle irons 17 at the left end are far away from one end of the outer fitting block 23 and the left special-shaped plate. 18 is fixedly connected, and the two triangle irons 17 on the right end are fixedly connected with the right special-shaped plate 14 away from the end of the outer matching block 23, the plate thickness of the right special-shaped plate 14 and the left special-shaped plate 18 is the same, each of the right special-shaped plate 14 and the left special-shaped plate 18 The lengths of the two support plates are the same. For the convenience of subsequent work principles, the right special-shaped plate 14 and the left special-shaped plate 18 are described here as being composed of a vertical dry plate and a plurality of support plates. The dry plate is carried out with the triangle iron 17 In the connected position, the upper surfaces of the right profiled plate 14 and the left profiled plate 18 are flush, and the length of each support plate of the right profiled plate 14 and the left profiled plate 18 is the same for making the right profiled plate 14 and the left profiled plate 18 horizontal There is no gap between the right special-shaped plate 14 and the left special-shaped plate 18, and the end faces of each support plate of the same right special-shaped plate 14 and left special-shaped plate 18 are flat end faces, the same purpose is to prevent the photosensitive resin from curing in the gap In the groove, it affects the bottom forming quality of the product;

The center of the side of the right special-shaped plate 14 and the left special-shaped plate 18 is provided with a penetrating waist-shaped groove 19, and a rigid strut 20 is inserted into the waist-shaped groove 19, and the two ends of the rigid strut 20 are fixedly connected with a connecting ring. 21, the lower end of the outer peripheral surface of the connecting ring 21 is fixedly connected with a telescopic rod 22, and the telescopic rod 22 is fixedly connected with the bottom of the photosensitive resin carrying case 1, and the length of the waist-shaped groove 19 matches the length of the herringbone guide groove 16, so that when When the outer mating block 23 slides to any position at the two ends of the herringbone guide groove 16, the rigid strut 20 is in contact with the two ends of the waist-shaped groove 19. At this time, the rigid strut 20 is equivalent to a hinged central rod, which can make the right profile Plate 14 and left profiled plate 18 rotate about rigid strut 20 .

When in use, first add suitable photosensitive resin to the photosensitive resin carrying case 1 according to the height of the product to be printed, start the motor 10, the motor 10 drives the third pulley 9 to rotate, and the third pulley 9 drives the second pulley 8 rotates, the second pulley 8 drives the screw rod 6 to rotate, and the screw rod 6 drives the first pulley 7 to rotate, and through the transmission of the two first pulleys 7, the two screw rods 6 on the same side start to rotate, and the two motors Driven by 10, the four screw rods 6 rotate synchronously, and the rotation of the screw rods 6 makes the four threaded blocks 12 slide downward along the inner wall of the photosensitive resin carrying case 1 to move linearly, and the threaded blocks 12 drive the connecting block 13 to move downward, and the connecting block 13 drives the connecting column 15 to move downward, and under the guidance of the upper half arc groove of the outer fitting block 23, the outer fitting blocks 23 on the left and right sides move relative to each other, so that the right special-shaped plate 14 and the left special-shaped plate 18 are driven by the triangle iron 17 Relative movement, the right special-shaped plate 14 and the left special-shaped plate 18 gradually rotate and reset from the state where the dry plate part of the connecting triangle 17 is tilted upward to the state where the right special-shaped plate 14 and the left special-shaped plate 18 are attached, and the connecting column 15 is at the connecting position at this time. The center position of the column 15, the state is shown in Figure 6 and Figure 7, at this time the right profiled plate 14 and the left profiled plate 18 are reset to the initial position to be printed, and then the motor 10 stops;

When printing, close the case cover 2 so that the LCD screen 3 is located directly above the photosensitive resin carrying case 1, and the motor 10 starts to drive the screw 6 to rotate, so that under the cooperation of the screw 6 and the threaded block 12, the connecting block 13 and the threaded block 12 moves downward in a straight line. At this time, since the right special-shaped plate 14 and the left special-shaped plate 18 are in the bonding position and the telescopic rod 22 is in a telescopic state, the connecting block 13 and the connecting column 15 can drive the outer fitting block 23 to go straight down. , the outer matching block 23 drives the right special-shaped plate 14 and the left special-shaped plate 18 to move downward linearly synchronously through the triangle iron 17. The bottom of the product solidified and formed above the right profiled plate 14 and the left profiled plate 18 can form a flat molding bottom surface;

After the printing is completed, the right special-shaped plate 14 and the left special-shaped plate 18 continue to move down a small distance until the telescopic rod 22 is in a fully contracted state, and now the continuation of the screw rod 6 makes the threaded block 12, the connecting block 13 and the connecting column 15 continue to move toward each other. Move down, at this time, under the effect of the herringbone guide groove 16, the outer matching block 23 slides to both ends, so that a gap gradually appears between the right profiled plate 14 and the left profiled plate 18, while the rigid strut 20 and the waist-shaped groove The ends of 19 are in contact, so that under the action of the lever fulcrum of the rigid strut 20, the right shaped plate 14 and the left shaped plate 18 rotate around the rigid strut 20. Rotate upward and tilt up, at this time, the right special-shaped plate 14 and the left special-shaped plate 18 are gradually detached from the middle part of the product to both ends, achieving the effect of preliminary demoulding;

After the threaded block 12 moved to the maximum stroke position of the screw rod 6, the motor 10 reversely rotated. At this time, the right profiled plate 14 and the left profiled plate 18 gradually reset to the horizontal position. When the right profiled plate 14 and the left profiled plate 18 moved up to At the initial position of printing, the telescopic rod 22 is at the position of the maximum extension length. At this time, the threaded block 12 continues to move upward along the screw rod 6. At this time, the right profiled plate 14 and the left profiled plate 18 gradually wrap around the rigid rod 20 Turn and move to form the right special-shaped plate 14 and the left special-shaped plate 18 from the horizontal state to the state where the dry plate part connected to the triangle iron 17 is turned up. The process is the same as the principle of preliminary demoulding, so it will not be repeated here;

At this time, the right profiled plate 14 and the left profiled plate 18 push the product to the middle from both ends, so as to promote the demoulding of the product from the right profiled plate 14 and the left profiled plate 18 again, achieving the effect of secondary demoulding , compared with the demoulding method of the reference file, this demoulding method also has a better demoulding effect, a higher degree of demoulding integrity, and less damage to the bottom surface of the product during the demoulding process.

To sum up, the 3D printing equipment for automatic demoulding, when printing the product, the right profiled plate 14 and the left profiled plate 18 are attached to each other to form a flat solidified surface, so that the product is on the right profiled plate 14 and the left profiled plate 14 The bottom of the plate 18 has a flat bottom surface after solidification, and the molding quality is better. When the product is demoulded after the product is molded, the continuous movement of the threaded block 12 after the telescopic rod 22 is fully shrunk and fully extended makes the right special-shaped plate 14 and the left special-shaped plate 14. The plates 18 are separated from each other and rotate twice in the opposite direction around the rigid pole 20, thereby completing the secondary demoulding of the printed product, which has a better demoulding effect, a higher degree of demoulding integrity, and a more efficient demoulding process. Less damage to the underside of the product.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides an automatic 3D printing apparatus of drawing of patterns, carries case (1) including the photosensitive resin that is used for holding photosensitive resin, carries case (1) outside outer tank tower (4) of fixing to photosensitive resin, with one side articulated case lid (2) of outer tank tower (4), sets up LCD screen (3) in case lid (2) below, its characterized in that: the photosensitive resin carries the upper end four corners of case (1) to be fixed and is equipped with extension board (5), the below of going up extension board (5) all rotates and is connected with screw rod (6), the external fixation of outer tank tower (4) is equipped with motor (10), motor (10) are used for driving screw rod (6) through drive assembly and rotate, every equal threaded connection of screw rod (6) has screw block (12), the side surface fixedly connected with connecting block (13) of photosensitive resin year case (1) inner wall is kept away from to screw block (12), the leading flank of connecting block (13) is fixed and is equipped with spliced pole (15), spliced pole (15) slidable connects in chevron shape guide way (16), chevron shape guide way (16) are seted up on the leading flank of outer cooperation piece (23), the side lower extreme welding of outer cooperation piece (23) has set angle (17), two of left end set angle (17) keep away from the one end of outer cooperation piece (23) and left heterotypic board (18) fixed connection, two of right-hand member set angle (17) keep away from the one end of outer cooperation piece (23) and right side heterotypic board (14) fixed connection heterotypic waist board (19), special-shaped support pole (19) and heterotypic waist board (19) run through in the heterotypic waist board (19) and heterotypic waist groove (19), the two ends of the rigid support rod (20) are fixedly connected with connecting rings (21), the lower end of the outer peripheral surface of each connecting ring (21) is fixedly connected with a telescopic rod (22), and each telescopic rod (22) is fixedly connected to the bottom of the photosensitive resin carrying box (1).

2. The automatic demolding 3D printing device according to claim 1, wherein: the transmission assembly comprises a first belt wheel (7), a second belt wheel (8) and a third belt wheel (9), wherein the first belt wheel (7) is fixedly connected to each screw rod (6) in a mode that the outer peripheral surface of the screw rod is close to the lower portion of the upper extension plate (5), the front end of the first belt wheel is connected with the rear end of the second belt wheel (7) through a belt, the second belt wheel (8) is fixedly arranged on the outer peripheral surface of the two screw rods (6) at the rear end of the first belt wheel (7) and located below the first belt wheel (7), the second belt wheel (8) is connected with the third belt wheel (9) through a belt, and the third belt wheel (9) is fixedly connected to an outer output shaft of the motor (10).

3. The automatic demolding 3D printing device according to claim 1, wherein: notch (11) have been seted up to the side upper end of photosensitive resin year case (1), the width of notch (11) and the belt width looks adaptation of being connected between second band pulley (8) and third band pulley (9).

4. The automatic demolding 3D printing device according to claim 1, wherein: each thread block (12) is in sliding contact with the inner wall of the photosensitive resin carrying box (1).

5. The automatic demolding 3D printing device according to claim 1, wherein: the plate thickness of the right special-shaped plate (14) is the same as that of the left special-shaped plate (18), and the length of each support plate of the right special-shaped plate (14) is the same as that of each support plate of the left special-shaped plate (18).

6. The automatic demolding 3D printing device according to claim 1, wherein: the side surface of the connecting block (13) and the side surface of the right special-shaped plate (14) are separated by a sliding clearance distance, and the side surface of the connecting block (13) and the side surface of the left special-shaped plate (18) are separated by a sliding clearance distance of the same size.

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