Positioning mechanism for 3D printer

Abstract

The utility model belongs to the technical field of 3D printers, and particularly relates to a positioning mechanism for a 3D printer, the positioning mechanism for the 3D printer comprises a horizontal moving mechanism and an electric displacement adjusting group, the upper side of the horizontal moving mechanism is provided with a base plate, the electric displacement adjusting group is provided with a printing nozzle, and the upper side of the base plate is provided with a shaping plane; at least two positioning blocks are arranged on the shaping plane, the horizontal positions of the positioning blocks on the shaping plane are adjustable, at the moment, according to the shape of the 3D structure, the base plate is adjusted to the corresponding positions on the shaping plane, a plurality of mounting grooves are formed in the shaping plane, and the positioning blocks can be mounted in any mounting groove; and filling blocks are mounted in the other mounting grooves. According to the 3D printer, the phenomenon of horizontal displacement and dislocation of a 3D structure on a shaping plane due to movement of the substrate in the printing process can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of 3D printers, and specifically relates to a positioning mechanism for a 3D printer. Background Art

[0002] 3D printer, also known as three-dimensional printer, is a machine of cumulative manufacturing technology, that is, rapid prototyping technology. It is based on a digital model file and uses special wax materials, powdered metal or plastic and other adhesive materials to print layers of adhesive materials to make three-dimensional objects.

[0003] During the printing process, the material is sprayed through the nozzle so that the material gradually forms a 3D structure (three-dimensional object) on the substrate;

[0004] There are many types of 3D printers. One type of 3D printer quickly adjusts the position between the print head and the 3D structure by synchronously moving the substrate and the print head. However, when the substrate moves, if the 3D structure is positioned only by the friction between the 3D structure and the substrate, the 3D structure is prone to horizontal displacement during the movement of the substrate. Utility Model Content

[0005] The purpose of the present invention is to provide a positioning mechanism for a 3D printer, which can reduce the horizontal displacement and misalignment of the 3D structure on the shaping plane caused by the movement of the substrate during the printing process.

[0006] The technical solutions adopted in this utility are as follows:

[0007] A positioning mechanism for a 3D printer comprises a horizontal moving mechanism and an electric displacement adjustment group, wherein a substrate is mounted on the upper side of the horizontal moving mechanism, a print head is mounted on the electric displacement adjustment group, a shaping plane is arranged on the upper side of the substrate, at least two positioning blocks are arranged on the shaping plane, and the horizontal position of the positioning blocks on the shaping plane is adjustable. At this time, the substrate is adjusted to a corresponding position on the shaping plane according to the shape of the 3D structure.

[0008] Furthermore, a plurality of installation grooves are provided on the shaping plane, and the positioning block can be installed inside any one of the installation grooves, and filling blocks are installed inside the remaining installation grooves.

[0009] Furthermore, the positioning block includes a hollow shell, a vertical movement group is installed inside the hollow shell, a positioning protrusion is installed on the vertical movement group, a through groove is opened on the upper side of the hollow shell, and the vertical movement group can drive the positioning protrusion to extend to the upper side of the hollow shell through the through groove.

[0010] Furthermore, the vertical moving group includes a magnetic plate and an electromagnet installed in sequence inside the hollow shell from top to bottom, the electromagnet is fixedly connected inside the hollow shell, the magnetic plate and the lower end of the positioning protrusion are fixedly connected, a return spring is installed between the electromagnet and the magnetic plate, and the electromagnet is magnetically attracted to the magnetic plate when energized.

[0011] Furthermore, a power module and a controller are arranged on the substrate, a connection terminal mother is fixedly connected to the lower end of the installation groove, the power module and the controller are electrically connected to the connection terminal mother, and a connection terminal adapted to the connection terminal mother is fixedly connected to the lower end of the hollow shell, and the connection terminal is electrically connected to the electromagnet.

[0012] Furthermore, the hollow shell and the filling block are both made of iron.

[0013] The technical effects achieved by this utility model are:

[0014] The practical positioning mechanism for a 3D printer can fix the bottom of the 3D structure by arranging two adjustable positioning blocks on the shaping plane, thereby reducing the horizontal displacement misalignment phenomenon of the 3D structure on the shaping plane when the horizontal moving mechanism drives the substrate and the 3D structure on the shaping plane to move, and reducing the problem of reduced printing accuracy caused by the horizontal displacement error of the 3D structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of this utility model;

[0016] Figure 2 It is a structural schematic diagram of the practical substrate;

[0017] Figure 3 It is a schematic diagram of the cutaway structure of the practical positioning block;

[0018] Figure 4 This is a practical Figure 1 Partially cut-away side view at A in the middle.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Base plate; 2. Electric displacement adjustment group; 3. Print nozzle; 4. Mounting slot; 5. Filling block; 6. Positioning block; 7. Hollow shell; 8. Positioning protrusion; 9. Through slot; 10. Magnetic plate; 11. Electromagnet; 12. Recessed area; 13. Return spring; 14. Connecting terminal; 15. Connecting terminal mother; 16. Horizontal moving mechanism. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0022] like Figure 1-4 As shown, a positioning mechanism for a 3D printer includes a horizontal moving mechanism 16 and an electric displacement adjustment group 2. A substrate 1 is mounted on the upper side of the horizontal moving mechanism 16. The horizontal moving mechanism 16 can be a combination of a horizontal rail and a trolley that can move on the rail, or a horizontally arranged electric push rod. By starting the horizontal moving mechanism 16, the substrate 1 can be driven to move horizontally. A print head 3 is installed on the electric displacement adjustment group 2. The electric displacement adjustment group 2 can be a combination of a horizontal rail, a vertical rail and a trolley that can move on the rail, or a robotic arm. The electric displacement adjustment group 2 only needs to drive the print head 3 to move, and the print head 3 can discharge materials. By adjusting the position of the print head 3 by the electric displacement adjustment group 2, the position of the print head 3 discharging materials can be adjusted, thereby forming different 3D structures.

[0023] During the printing process, the raw material is output to the substrate 1 through the print head 3 to form a 3D structure. At the same time, the substrate 1 is moved by the horizontal moving mechanism 16, and the print head 3 is driven to move by the electric displacement adjustment group 2, so that the relative position between the 3D structure and the print head 3 can be quickly adjusted.

[0024] Among them, Figure 1-2 As shown, the core of the present technical solution is that a shaping plane is provided on the upper side of the substrate 1, and the 3D structure can be printed on the shaping plane. At least two positioning blocks 6 are provided on the shaping plane, and the horizontal position of the positioning blocks 6 on the shaping plane is adjustable. At this time, according to the shape of the 3D structure, the substrate 1 is adjusted to the corresponding position on the shaping plane, and the bottom of the 3D structure can be fixed by the two positioning blocks 6 during the printing process, thereby reducing the horizontal displacement and misalignment of the 3D structure on the shaping plane when the horizontal moving mechanism 16 drives the substrate 1 and the 3D structure on the shaping plane to move, thereby reducing the problem of decreased printing accuracy caused by the horizontal displacement error of the 3D structure, and by adjusting the positions of the two positioning blocks 6, more 3D structures can be adapted.

[0025] At the same time, since the two positioning blocks 6 are located at the lower side of the 3D structure, only two recessed holes are formed at the lower side of the 3D structure, which has little impact on the 3D structure.

[0026] There are many ways to adjust the positioning block 6 horizontally on the shaping plane. One of them is that a slide plate is slidably connected to the upper side of the substrate 1, and the positioning block 6 is fixedly connected to the slide plate. The position of the positioning block 6 can be adjusted by sliding the slide plate, and the upper surface of the slide plate is highly flush with the upper surface of the shaping plane.

[0027] Another way to adjust the level of the positioning block 6 on the shaping plane is as follows Figure 1-2 As shown, a plurality of mounting grooves 4 are provided on the shaping plane, and the positioning block 6 can be installed inside any mounting groove 4, and the installation method can be placement or clamping, and the mounting groove 4 and the positioning block 6 have clearance fit, and after installation, the gap between the mounting groove 4 and the upper surface of the positioning block 6 is small, thereby being able to reduce the strip-like protrusions formed on the bottom surface of the 3D structure due to the gap.

[0028] At the same time, filling blocks 5 are installed inside the remaining installation grooves 4, and the installation method can also be placed or clamped. The filling blocks 5 are used to seal and fill the installation grooves 4, effectively reducing the strip-shaped protrusions formed on the bottom surface of the 3D structure due to the installation grooves 4.

[0029] Among them, the structure of the positioning block 6 can be as follows Figure 2-3 As shown, it is adjustable, that is, the positioning block 6 includes a hollow shell 7 that can be installed inside the mounting groove 4, a vertical moving group is installed inside the hollow shell 7, a positioning protrusion 8 is installed on the vertical moving group, and a through groove 9 is opened on the upper side of the hollow shell 7. The vertical moving group can drive the positioning protrusion 8 to extend to the upper side of the hollow shell 7 through the through groove 9. At this time, when the hollow shell 7 is installed in the mounting groove 4, the upper surface of the hollow shell 7 is flush with the upper surface of the shaping plane, ensuring that the bottom surface of the 3D structure is planar. After the 3D structure is printed and formed, the positioning protrusion 8 is driven to shrink by the vertical moving group, so that the positioning protrusion 8 and the 3D structure can be separated, thereby making it relatively simple to remove the 3D structure from the shaping plane, and the removal process is less affected by the positioning protrusion 8.

[0030] Among them, the vertical movement group includes a magnetic plate 10 and an electromagnet 11 which are installed in sequence inside the hollow shell 7 from top to bottom. The electromagnet 11 is fixedly connected inside the hollow shell 7. The magnetic plate 10 and the lower end of the positioning protrusion 8 are fixedly connected. In order to enable the positioning protrusion 8 to move to the upper side of the hollow shell 7, a return spring 13 is installed between the electromagnet 11 and the magnetic plate 10. The magnetic plate 10 is lifted by the elasticity of the return spring 13 to locate the position of the positioning protrusion 8. At the same time, a recessed area 12 can be opened on the upper side of the electromagnet 11, and the lower end of the return spring 13 is installed inside the recessed area 12, so that the length of the return spring 13 can be lengthened.

[0031] When the electromagnet 11 is energized, it is magnetically attracted to the magnetic plate 10 , and the magnetic plate 10 is pulled down by magnetic force, so that the magnetic plate 10 drives the positioning protrusion 8 to move downward. The structure is simple and the vertical movement of the positioning protrusion 8 can be effectively controlled.

[0032] The power supply of the electromagnet 11 can be arranged inside the hollow housing 7, or can be arranged on the substrate 1, such as Figure 4 As shown, the technical solution chooses to set a power module and a controller on the substrate 1, and the lower end of the installation groove 4 is fixedly connected with a connecting terminal mother 15, and the power module and the controller are both electrically connected to the connecting terminal mother 15. The lower end of the hollow shell 7 is fixedly connected with a connecting terminal 14 that is compatible with the connecting terminal mother 15, and the connecting terminal 14 and the electromagnet 11 are electrically connected. When the hollow shell 7 is installed in the installation groove 4, the connecting terminal 14 and the connecting terminal mother 15 are assembled together to complete the electrical connection, so that the electromagnet 11 can be powered. At this time, the power on and off of the electromagnet 11 can be controlled by the controller.

[0033] Another structure of the vertical moving group can be an electric push rod, and the movable rod of the electric push rod is fixedly connected to the positioning protrusion 8, which can directly drive the positioning protrusion 8 to move vertically.

[0034] At the same time, the material of the hollow shell 7 and the filling block 5 is preferably iron. At this time, the filling block 5 and the hollow shell 7 can be adsorbed by a magnet, and the filling block 5 and the hollow shell 7 can be directly sucked out from the inside of the installation groove 4, thereby completing the disassembly of the filling block 5 and the positioning block 6 relatively easily.

[0035] The working principle of the utility model is as follows: according to the shape of the 3D structure, the positioning block 6 is placed inside the corresponding installation groove 4, and then the print head 3 is started to print. While printing, the substrate 1 is driven to move by the horizontal moving mechanism 16, and the print head 3 is driven to move by the electric displacement adjustment group 2, so that the relative position between the 3D structure and the print head 3 can be adjusted to form 3D structures of different shapes;

[0036] During the printing process, the bottom of the 3D structure is fixed by two positioning blocks 6 to reduce the horizontal displacement of the 3D structure on the shaping plane when the horizontal moving mechanism 16 drives the substrate 1 and the 3D structure on the shaping plane to move;

[0037] After printing is completed, the controller can control the electromagnet 11 to be energized to magnetically adsorb the magnetic plate 10, and the magnetic plate 10 and the positioning protrusion 8 are moved downward by magnetic force, so that the positioning protrusion 8 and the 3D structure can be separated, thereby making it easier to remove the 3D structure from the shaping plane.

[0038] In summary, in the present technical solution, by setting two adjustable positioning blocks 6 on the shaping plane, the bottom of the 3D structure can be fixed by the two positioning blocks 6, thereby reducing the horizontal displacement and misalignment of the 3D structure on the shaping plane when the horizontal moving mechanism 16 drives the substrate 1 and the 3D structure on the shaping plane to move, and reducing the problem of decreased printing accuracy caused by the horizontal displacement error of the 3D structure.

[0039] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A positioning mechanism for a 3D printer, comprising a horizontal moving mechanism (16) and an electric displacement adjustment group (2), wherein a substrate (1) is mounted on the upper side of the horizontal moving mechanism (16), and a printing head (3) is mounted on the electric displacement adjustment group (2), characterized in that: A shaping plane is arranged on the upper side of the substrate (1), and at least two positioning blocks (6) are arranged on the shaping plane, and the horizontal position of the positioning blocks (6) on the shaping plane is adjustable. At this time, the substrate (1) is adjusted to a corresponding position on the shaping plane according to the shape of the 3D structure; The positioning block (6) comprises a hollow shell (7), a vertical movement group is installed inside the hollow shell (7), a positioning protrusion (8) is installed on the vertical movement group, and a through slot (9) is provided on the upper side of the hollow shell (7). The vertical movement group can drive the positioning protrusion (8) to extend to the upper side of the hollow shell (7) through the through slot (9).

2. A positioning mechanism for a 3D printer according to claim 1, characterized in that: A plurality of installation slots (4) are provided on the shaping plane, the positioning block (6) can be installed inside any one of the installation slots (4), and filling blocks (5) are installed inside the remaining installation slots (4).

3. A positioning mechanism for a 3D printer according to claim 2, characterized in that: The vertical moving group comprises a magnetic plate (10) and an electromagnet (11) which are sequentially installed inside the hollow shell (7) from top to bottom, the electromagnet (11) is fixedly connected inside the hollow shell (7), the magnetic plate (10) and the lower end of the positioning protrusion (8) are fixedly connected, a return spring (13) is installed between the electromagnet (11) and the magnetic plate (10), and the electromagnet (11) and the magnetic plate (10) are magnetically attracted to each other when power is supplied.

4. A positioning mechanism for a 3D printer according to claim 3, characterized in that: A power module and a controller are arranged on the substrate (1); a connection terminal (15) is fixedly connected to the lower end of the interior of the mounting groove (4); the power module and the controller are both electrically connected to the connection terminal (15); a connection terminal (14) adapted to the connection terminal (15) is fixedly connected to the lower end of the hollow shell (7); and the connection terminal (14) is electrically connected to the electromagnet (11).

5. A positioning mechanism for a 3D printer according to claim 4, characterized in that: The hollow shell (7) and the filling block (5) are both made of iron.

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