High-precision sand mold 3D printing forming device

Abstract

The utility model belongs to the field of 3D printing, and particularly relates to a high-precision sand mold 3D printing forming device which comprises a printing assembly, and the printing assembly is movably installed on a moving guide rail of the sand mold 3D printing forming device and horizontally moves along the moving guide rail. The sand paving assembly comprises a sand box and a scraping plate, the sand box is installed at the front end of a shell of the printing assembly, a sand shakeout hole is formed in the bottom of the sand box, a baffle is arranged at the bottom of the sand shakeout hole, and the sand shakeout hole is controlled to be opened or closed through the baffle; a mounting plate is fixedly connected to the front end of the sand box, a mounting groove is formed in the front end of the mounting plate, mounting shafts are fixedly connected to the two sides of the top end of the scraping plate correspondingly, the mounting shafts are rotatably mounted in mounting holes in the two sides of the mounting groove, and an adjusting motor is fixedly mounted on the side wall of the mounting plate; according to the utility model, the inclination angle of the scraper blade can be changed, and the pressure of the scraper blade on the sand material can be adjusted according to different sand material characteristics, so that the printing precision can be improved.

Description

Technical Field

[0001] The utility model relates to the field of 3D printing, in particular to a high-precision sand mold 3D printing forming device. Background Art

[0002] Sand mold 3D printing technology is a new technology that applies rapid prototyping technology to traditional resin sand casting technology. During molding, the catalyst is evenly mixed with the raw sand, and the nozzle accurately sprays the binder according to the cross-sectional pattern. The binder reacts with the catalyst, and the solidified sand is accumulated layer by layer to form a shape.

[0003] The utility model with the publication number CN214448516U discloses a sand type 3D printer head, including: a head body; a printing component, which is fixed on the head body and moves with the head body; a sand laying component, which includes a sand box, a baffle and a scraper. The sand box is fixed on the shell of the printing component, and a sand falling port is provided at the bottom of the sand box. The sand falling port is located on one side of the nozzle of the printing component. The baffle is provided at the sand falling port. The sand falling port is closed or opened by controlling the baffle. The scraper is fixed on the sand box and is located on one side of the sand falling port, which is used for forward sand laying and reverse sand leveling. The above-mentioned sand type 3D printer head uses a unified power source for the printing component and the sand laying component. In one reciprocating cycle, forward sand laying and reverse printing are performed, and the action efficiency is high. The amount of sand laying can be adjusted according to the actual situation, which saves equipment space and reduces the equipment failure rate. It does not limit the travel of the printing component and the sand laying component, which is more flexible and has a wider applicability, and meets more working conditions.

[0004] However, the scraper angle of the above device is fixed, and the inclination angle of the scraper cannot be adjusted according to the characteristics of different sand materials, and thus the pressure on the sand materials cannot be changed, which is not conducive to the laying of some sand materials, and further may affect the printing accuracy; therefore, a high-precision sand mold 3D printing forming device is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology and solve the problem that the angle of the existing scraper is fixed, the inclination angle of the scraper cannot be adjusted according to the characteristics of different sand materials, and thus the pressure on the sand materials cannot be changed, which is not conducive to the laying of part of the sand materials, and further may affect the printing accuracy, the utility model proposes a high-precision sand mold 3D printing forming device.

[0006] The technical solution adopted by the utility model to solve its technical problem is: a high-precision sand mold 3D printing forming device described in the utility model includes a printing component, which is movably installed on a moving guide rail of the sand mold 3D printing forming device and moves horizontally along the moving guide rail;

[0007] The sand-laying component comprises a sand box and a scraper, wherein the sand box is installed at the front end of the shell of the printing component, a sand falling hole is provided at the bottom of the sand box, a baffle is provided at the bottom of the sand falling hole, and the opening or closing of the sand falling hole is controlled by the baffle; a mounting plate is fixedly connected to the front end of the sand box, a mounting groove is provided at the front end of the mounting plate, mounting shafts are fixedly connected to the two sides of the top end of the scraper respectively, and the mounting shafts are rotatably installed in the mounting holes on both sides of the mounting groove, an adjusting motor is fixedly installed on the side wall of the mounting plate, and one side of the mounting shaft is fixedly connected to the output shaft of the adjusting motor.

[0008] Preferably, the regulating motor is a servo motor, and the regulating motor is controlled by an electric control signal.

[0009] Preferably, a plurality of sand falling holes are provided, and the holes are evenly distributed in a plurality of vertical rows at the bottom of the sand box.

[0010] Preferably, a fixing plate is fixedly connected in the middle of the side wall of the baffle, a cylinder is fixedly installed at the bottom of the sand box, a telescopic end of the cylinder is fixedly connected to the fixing plate, and the cylinder is controlled by an electric control signal.

[0011] Preferably, the baffle is in contact with the bottom of the sand box.

[0012] Preferably, two sides of the bottom of the sand box are symmetrically fixedly connected with limiting slide rails.

[0013] Preferably, the limiting slide rail is L-shaped, and both ends of the baffle are slidably arranged in the middle of the limiting slide rail.

[0014] The utility model is beneficial in that:

[0015] 1. The utility model is provided with an adjustable motor and a scraper. When in use, the motor drives the mounting shaft and the scraper to rotate, thereby changing the inclination angle of the scraper. According to the different characteristics of the sand material, the pressure of the scraper on the sand material is adjusted. For sand materials with larger particle size or poor fluidity, the pressure needs to be increased to ensure that each layer of sand material is evenly laid. Different types of sand materials can be laid flat to improve printing accuracy.

[0016] 2. The utility model is provided with sand falling holes, baffles, fixed plates and cylinders. When the device is used, when it moves toward the left side as shown in the figure, the nozzle at the bottom of the printing assembly does not work. The baffle is opened, and the sand in the sand box falls from the sand falling holes. At the same time, the sand is smoothed by the scraper. When the device moves to the right, the sand falling holes are closed by the baffle, and the bottom of the sand is smoothed again by the scraper. The nozzle starts to work and prints. In addition, by pushing the fixed plate and the baffle to move through the cylinder, the number of sand falling holes that are allowed to leak sand can be controlled, so as to control the amount of sand falling and the sand falling rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the first embodiment;

[0019] Figure 2 For Example 1 Figure 1 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 3 This is a schematic diagram of the bottom structure of the sand box of Example 1;

[0021] Figure 4 It is a side view of the first embodiment;

[0022] Figure 5 It is a schematic diagram of the structure of the limiting slide rail of the second embodiment.

[0023] In the figure: 1. Printing assembly; 2. Sand box; 3. Mounting plate; 4. Scraper; 5. Mounting slot; 6. Adjusting motor; 7. Sand drop hole; 8. Baffle; 9. Fixed plate; 10. Cylinder; 11. Limiting slide rail. DETAILED DESCRIPTION

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

[0025] Embodiment 1

[0026] See also Figure 1-4 As shown, a high-precision sand mold 3D printing forming device includes a printing component 1, wherein the printing component 1 is movably mounted on a movable guide rail of the sand mold 3D printing forming device and moves horizontally along the movable guide rail;

[0027] The sand laying component comprises a sand box 2 and a scraper 4. The sand box 2 is installed at the front end of the shell of the printing component 1. A sand falling hole 7 is provided at the bottom of the sand box 2. A baffle 8 is provided at the bottom of the sand falling hole 7. The baffle 8 controls the opening or closing of the sand falling hole 7. A mounting plate 3 is fixedly connected to the front end of the sand box 2. A mounting groove 5 is provided at the front end of the mounting plate 3. Mounting shafts are fixedly connected to the top ends of the scraper 4 at both sides, and the mounting shafts are rotatably installed in the mounting holes on both sides of the mounting groove 5. An adjusting motor 6 is fixedly installed on the side wall of the mounting plate 3, and one side of the mounting shaft is fixedly connected to the output shaft of the adjusting motor 6.

[0028] When working, when the device moves to the left side as shown in the figure, the nozzle at the bottom of the printing component 1 does not work, the baffle 8 is opened, and the sand in the sand box 2 falls from the sand falling hole 7, and the sand is flattened by the scraper 4. When the device moves to the right, the sand falling hole 7 is closed by the baffle 8, and the bottom of the sand is flattened again by the scraper 4, and the nozzle starts to work and print; in addition, the motor drives the installation shaft and the scraper 4 to rotate, so that the inclination angle of the scraper 4 can be changed, and the pressure of the scraper 4 on the sand can be adjusted according to the different sand characteristics. For sand with larger particle size or poor fluidity, the pressure needs to be increased to ensure that each layer of sand is evenly laid, and different types of sand can be flattened to improve printing accuracy.

[0029] The regulating motor 6 is a servo motor, and the regulating motor 6 is controlled by an electric control signal; when working, the inclination angle of the scraper 4 can be controlled by the regulating motor 6 .

[0030] The sand falling holes 7 are provided in a plurality and are evenly distributed in a plurality of vertical rows at the bottom of the sand box 2;

[0031] A fixed plate 9 is fixedly connected in the middle of the side wall of the baffle 8, and a cylinder 10 is fixedly installed at the bottom of the sand box 2. The telescopic end of the cylinder 10 is fixedly connected to the fixed plate 9, and the cylinder 10 is controlled by an electric control signal; when working, the fixed plate 9 and the baffle 8 are pushed to move by the cylinder 10 to control the moving position of the baffle 8, thereby controlling the number of sand falling holes 7 that allow sand to leak, so as to control the sand falling amount and sand falling rate.

[0032] The baffle plate 8 is fitted with the bottom of the sand box 2 so that the baffle plate 8 can completely close the sand falling hole 7 during operation.

[0033] Embodiment 2

[0034] See also Figure 5 As shown, in comparison with Example 1, as another embodiment of the present utility model, the two sides of the bottom of the sand box 2 are symmetrically fixedly connected with the limited position slide rails 11;

[0035] The limiting slide rail 11 is L-shaped, and the two ends of the baffle 8 are slidably arranged in the middle of the limiting slide rail 11; when working, the baffle 8 is limited by setting the limiting slide rail 11, so that the movement of the baffle 8 is more stable.

[0036] Working principle: when the device moves to the left side as shown in the figure, the nozzle at the bottom of the printing component 1 does not work, the baffle 8 is opened, and the sand in the sand box 2 falls from the sand falling hole 7, and the sand is flattened by the scraper 4. When the device moves to the right, the sand falling hole 7 is closed by the baffle 8, and the bottom of the sand is flattened again by the scraper 4, and the nozzle starts to work and prints; in addition, the motor drives the installation shaft and the scraper 4 to rotate, and then the inclination angle of the scraper 4 can be changed, and the pressure of the scraper 4 on the sand can be adjusted according to the different sand characteristics. For sand with larger particle size or poor fluidity, the pressure needs to be increased to ensure that each layer of sand is evenly laid, and different types of sand can be flattened to improve printing accuracy.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A high-precision sand mold 3D printing forming device, characterized in that: The printing assembly (1) is movably mounted on a movable guide rail of a sand mold 3D printing forming device and moves horizontally along the movable guide rail; A sand laying component comprises a sand box (2) and a scraper (4), wherein the sand box (2) is mounted on the front end of a shell of a printing component (1), a sand falling hole (7) is provided at the bottom of the sand box (2), a baffle (8) is provided at the bottom of the sand falling hole (7), and the opening or closing of the sand falling hole (7) is controlled by the baffle (8); a mounting plate (3) is fixedly connected to the front end of the sand box (2), a mounting groove (5) is provided at the front end of the mounting plate (3), mounting shafts are fixedly connected to the top ends of the scraper (4) on both sides, and the mounting shafts are rotatably mounted in the mounting holes on both sides of the mounting groove (5), an adjusting motor (6) is fixedly mounted on the side wall of the mounting plate (3), and one side of the mounting shaft is fixedly connected to the output shaft of the adjusting motor (6).

2. A high-precision sand mold 3D printing forming device according to claim 1, characterized in that: The regulating motor (6) is a servo motor, and the regulating motor (6) is controlled by an electric control signal.

3. A high-precision sand mold 3D printing forming device according to claim 2, characterized in that: A plurality of sand falling holes (7) are provided and are evenly distributed in a plurality of vertical rows at the bottom of the sand box (2).

4. A high-precision sand mold 3D printing forming device according to claim 3, characterized in that: A fixed plate (9) is fixedly connected to the middle of the side wall of the baffle (8), and a cylinder (10) is fixedly installed at the bottom of the sand box (2). The telescopic end of the cylinder (10) is fixedly connected to the fixed plate (9), and the cylinder (10) is controlled by an electric control signal.

5. A high-precision sand mold 3D printing forming device according to claim 4, characterized in that: The baffle (8) is fitted to the bottom of the sand box (2).

6. A high-precision sand mold 3D printing forming device according to claim 5, characterized in that: The two sides of the bottom of the sand box (2) are symmetrically fixedly connected with limiting slide rails (11).

7. A high-precision sand mold 3D printing forming device according to claim 6, characterized in that: The limiting slide rail (11) is L-shaped, and the two ends of the baffle (8) are slidably arranged in the middle of the limiting slide rail (11).

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