CN105690764A - Spray head device achieving parallel printing and 3D printing method - Google Patents

Abstract

The invention discloses a nozzle device and a 3D printing method for realizing parallel printing, which include a base plate and a plurality of nozzles; A nozzle; the nozzle is provided with a raw material nozzle and a latex nozzle. By scanning, slicing, and projecting the printed object, the latex extrusion area is determined according to the outer contour parameters. In the pixel grid area, the raw material nozzle corresponding to the nozzle is used for raw material extrusion; in the latex extrusion area, through the latex nozzle Perform latex extrusion; cycle work to complete the entire printing process. The invention realizes the parallel printing of multiple nozzles, improves the printing speed, and realizes hollow printing by setting latex supports outside the projected image area, thereby reducing the consumption of raw materials.

Description

Nozzle device and 3D printing method for realizing parallel printing

technical field

The invention relates to the field of 3D printing, in particular to a nozzle device and a 3D printing method for realizing parallel printing.

Background technique

3D printer, also known as three-dimensional printer, is a kind of accumulative manufacturing technology, that is, a machine of rapid prototyping technology. Print layers of adhesive material to create three-dimensional objects. At this stage 3D printers are used to manufacture products. The technology of constructing objects by printing layer by layer. The principle of a 3D printer is to put data and raw materials into the 3D printer, and the machine will build the product layer by layer according to the program. There are various forms of stacking thin layers by 3D printers. The biggest difference between a 3D printer and a traditional printer is that the "ink" it uses is a real raw material. There are various forms of stacking thin layers, and there are various types of media that can be used for printing, from a variety of plastics to metals, ceramics and rubber. class of substances. Some printers can also combine different media, so that the printed object is hard on one side and soft on the other.

Traditional 3D printers only have dot printing performed by a single nozzle or dual nozzles. In the printing process of traditional 3D printers, it is necessary to add fine drawing wires of nozzles in the middle of the printed object to play a supporting role in order to facilitate the smooth printing of the upper layer. It is a waste of time for a single nozzle to slide and print on the entire surface, and the printed things (such as: QQ dolls) are almost solid; this traditional 3D printer mainly has the following two problems:

1. It takes a long time to print, because one nozzle or two nozzles work in units of dots, which greatly reduces the printing efficiency.

2. The material consumption is high, because the nozzle of the traditional 3D printer has only one raw material inlet. In order to shape and help the printing of the upper layer, thin wire drawing is used to support the upper and lower gaps. In the process of drawing a nozzle as a support, it undoubtedly prolongs the printing time a lot.

Contents of the invention

In view of the deficiencies in the above problems, the present invention provides a nozzle device and a 3D printing method for realizing parallel printing.

In order to achieve the above purpose, the present invention provides a nozzle device for parallel printing, including a bottom plate and a plurality of nozzles;

A plurality of the nozzles are evenly distributed on the base plate, and the base plate is divided into grid areas with equal areas, and each grid area is provided with a sprinkler head;

The spray head is provided with a raw material nozzle and a latex nozzle.

As a further improvement of the present invention, the printing area controlled by each nozzle is the area within the grid area corresponding to each nozzle and the area of the grid lines on the right side and the bottom side of the grid area.

As a further improvement of the present invention, it also includes a motor, which is connected to all the nozzles and is used to control the nozzles to print sequentially from left to right and from top to bottom in their corresponding grid area; each The nozzle controls the opening and closing of the raw material nozzle and the latex nozzle according to the projection in the corresponding grid area.

The invention also discloses a 3D printing method for realizing parallel printing, which includes the following steps:

Step 1. Stereoscopically image the object to be printed in the slicing software of the 3D printer through the scanner, and store the outer contour parameters of the object to be printed at the same time;

Step 2, slicing software slices the imaged 3D image;

Step 3, the first slice is vertically projected to the printer to form a projected image area on the bottom plate of the nozzle device;

Step 4, determine the latex extrusion area outside the projected image area according to the outer contour parameters;

Step 5. Select the projection image area on the bottom plate and the nozzle corresponding to the latex extrusion area, and start it;

Step 6. The motor controls the activated nozzles to print sequentially from left to right and from top to bottom in the corresponding grid area. The activated nozzles include: raw material nozzles and latex nozzles;

Step 7. In the projected image area, the raw material nozzle extrudes the raw material; in the latex extrusion area, the latex nozzle extrudes the latex;

Step 8: The first slice of the slicing software is printed; after the printed material is solidified, the slicing software provides the next slice map, and the cycle works until the last slice in the 3D slicing software is printed and stops automatically.

As a further improvement of the present invention, it also includes between step one and step two:

Step 9, scaling and repairing the imaged 3D image.

As a further improvement of the present invention, in the first step, the 3D stereoscopic image formed in the slicing software is a closed image, and the outer contour parameters include wall thickness, coordinates and angles.

As a further improvement of the present invention, in the second step, the slicing software slices the imaged 3D image with a slice thickness of 0.2mm-0.3mm.

As a further improvement of the present invention, in the seventh step, the latex is selected from water-soluble latex.

As a further improvement of the present invention, said step 4 includes:

The outer contour parameters in step 1 are analyzed and processed by the 3D printer processor to determine the width of latex required outside the projected image area under different slices, and determine the latex extrusion area.

Compared with prior art, the beneficial effect of the present invention is:

In the nozzle device and 3D printing method for realizing parallel printing disclosed in the present invention, by uniformly distributing a plurality of nozzles on the bottom plate, each nozzle controls the printing of a designated grid area, and the printing area controlled by each nozzle is corresponding to each nozzle. The area within the grid area and the area of the grid lines on the right side and the bottom side of the grid area; it ensures the perfect connection between the adjacent grid areas when the nozzle prints in the grid area, and avoids two adjacent grid areas. Creates gaps between grid areas. At the same time, each nozzle has a raw material nozzle and a latex nozzle at the same time; in the grid area with pixels, the raw material nozzle of the corresponding nozzle performs raw material extrusion; the latex extrusion area is determined according to the outer contour parameters outside the projected image area, and The latex is extruded through the latex nozzle; the width of the extruded latex is determined by the outer contour size of the scanned object to ensure that the latex of two adjacent layers of slices can be bonded to each other; the above structure can realize parallel printing of 3D printers, ensuring raw material printing and latex Simultaneous support, saving time and improving printing speed; at the same time, because only the outside of the slice image needs to be supported, and the inside is not supported, the purpose of this is to achieve a more perfect three-dimensional presentation, reduce the weight of the printed item, and change the past. The disadvantages of internal material support to achieve hollow printing;

Use one motor to control the movement of all nozzles, which improves the working efficiency of the motor and the overall control ability of the motor;

Water-soluble latex is used as the supporting material. Water-soluble latex has the function of supporting and slightly sticking; after the printing is completed, the thicker gel support on the outside can be peeled off with slight force, and the gel attached to the corner of the printed object is only It dissolves by soaking in tap water, so fine parts of support material can be removed without applying too much force.

Description of drawings

Fig. 1 is a structural diagram of a nozzle device for realizing parallel printing disclosed by an embodiment of the present invention;

Fig. 2 is a structural diagram of the nozzle in Fig. 1;

Fig. 3 is the printing area controlled by the nozzle in Fig. 1;

Fig. 4 is a flowchart of a 3D printing method for realizing parallel printing disclosed by an embodiment of the present invention;

Fig. 5 is a projection view of a cylinder disclosed by an embodiment of the present invention.

In the figure: 1. Bottom plate; 2. Nozzle; 2-1. Raw material nozzle; 2-2. Latex nozzle; 3. Grid area; 4. Grid line area; 5. Projected image area; 6. Latex extrusion area .

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

The present invention provides a nozzle device for parallel printing, which includes a bottom plate 1 and a plurality of nozzles 2;

A plurality of the nozzles are evenly distributed on the base plate, and the base plate is divided into grid areas with equal areas, and each grid area is provided with a sprinkler head;

The spray head is provided with a raw material nozzle and a latex nozzle.

Further, the printing area controlled by each nozzle is the area within the grid area corresponding to each nozzle and the area of the grid lines on the right side and the bottom side of the grid area.

Further, it also includes a motor, the motor is connected with all the nozzles, and is used to control the nozzles to print sequentially from left to right and from top to bottom in their corresponding grid area; each nozzle according to its The projection in the corresponding grid area controls the opening and closing of the raw material nozzle and latex nozzle.

The invention also discloses a 3D printing method for realizing parallel printing, which includes the following steps:

Step 1. Stereoscopically image the object to be printed in the slicing software of the 3D printer through the scanner, and store the outer contour parameters of the object to be printed at the same time. The outer contour parameters include wall thickness, coordinates and angles;

Step 2, slicing software slices the imaged 3D image;

Step 3, the first slice is vertically projected to the printer to form a projected image area on the bottom plate of the nozzle device;

Step 4, determine the latex extrusion area outside the projected image area according to the outer contour parameters;

Step 5. Select the projection image area on the bottom plate and the nozzle corresponding to the latex extrusion area, and start it;

Step 6. The motor controls the activated nozzles to print sequentially from left to right and from top to bottom in the corresponding grid area. The activated nozzles include: raw material nozzles and latex nozzles;

Step 7. In the projected image area, the raw material nozzle extrudes the raw material; in the latex extrusion area, the latex nozzle extrudes the latex;

Step 8: After the first slice of the slicing software is printed, lift up the nozzle of the columnar projection; after the printed material is solidified, the slicing software provides the next slice image, and the cycle works until the last slice in the 3D slicing software is printed Automatic stop.

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Embodiment 1: As shown in Figures 1-3, a nozzle device for realizing parallel printing according to the present invention includes a bottom plate 1 and a plurality of nozzles 2;

A plurality of nozzles 2 are evenly distributed on the base plate 1, and the base plate 1 is divided into rectangular grid areas 3 with equal areas, and each grid area 3 is provided with a nozzle 2; the nozzle 2 is provided with a raw material nozzle 2-1 and latex Nozzle 2-2.

The printing area controlled by each nozzle 2 of the present invention is the area of 3 in the grid area corresponding to each nozzle 2 and the area of the grid line area 4 on the right and lower sides of the grid area; it ensures that the nozzle is in the grid area The perfect connection between adjacent grid areas during printing avoids gaps between two adjacent grid areas. In the printing method of 3D printing parallel matrix, there are two nozzles on one nozzle. The initial arrangement order is that the two nozzles are arranged side by side, and they are printed in order from left to right and from top to bottom, but in order to avoid the two nozzles outside each other With each other’s printing tasks, we designed two nozzles that can rotate at any angle in 360 degrees with each other as the axis and the raw material supply nest on the nozzle according to the pixel requirements of the working slice display. This rotation design will avoid printing time. At the far right or left of the slice, the space occupied by the two nozzles affects the printing effect.

The nozzle device of the present invention also includes a motor, and the motor controls the nozzles in two ways: 1. One motor is used for control, one motor is connected to all the nozzles, and the motor controls the nozzles that need to be printed in its corresponding grid area Print linearly from left to right, then move down one grid, and then print linearly from left to right. All nozzles move in the same way. When there is a corresponding printing area under each nozzle, the corresponding nozzle will carry out raw material printing. or latex extrusion; if there is no corresponding printing area, the corresponding nozzle will not extrude raw material or latex; use one motor to control the movement of all nozzles, which improves the working efficiency of the motor and the overall control ability of the motor. 2. Two motors are used. One motor can only control the horizontal movement of all nozzles, and one motor can only control the longitudinal movement of the nozzles. The printing process of different nozzles in the corresponding grid area is carried out independently of each other. The motor is connected to all nozzles 2, and the motor controls the nozzles that need to be printed to print sequentially from left to right and from top to bottom in their corresponding grid area; each nozzle is based on the projection image area in its corresponding grid area and The latex extrusion area controls the opening and closing of the raw material nozzle and the latex nozzle as well as extrusion printing.

Embodiment 2: As shown in Figure 4, the present invention also discloses a 3D printing method for realizing parallel printing, comprising the following steps:

(1) The object to be printed is stereoscopically imaged in the slicing software of the 3D printer through the scanner, and the outer contour parameters of the object to be printed are stored at the same time. The outer contour size includes wall thickness and angle, and the 3D stereoscopic image formed in the slicing software is a closed image;

(2), scaling and repairing the imaged 3D image;

(3) The slicing software slices the imaged 3D image, and the slice thickness is 0.2mm～0.3mm;

(4) Perform cylindrical projection on the first slice perpendicular to the printer, and form a projected image area on the bottom plate of the nozzle device;

(5) Through the analysis and processing of the outer contour parameters by the processor of the 3D printer, the width of latex required outside the projected image area under different slices is judged, and the latex extrusion area is determined.

(6), select the projected image area on the base plate and the nozzle work corresponding to the latex extrusion area;

(7) The nozzles that need to be controlled by the motor print sequentially from left to right and from top to bottom in the corresponding grid area;

(8), carry out raw material extruding by raw material nozzle in the projected image area, carry out latex extrusion by latex nozzle in the latex extrusion area, latex selects water-soluble latex for use, preferably Agilista gel material. The raw material nozzle and latex nozzle on a nozzle can control the rotation of the nozzle according to the pixel on the slice to be worked and the point coordinates of the projected graphics.

(9) After the first slice of the slicing software is printed, lift the nozzle of the columnar projection; after the printed material is solidified, the slicing software provides the next slice image, and the cycle works until the last slice in the 3D slicing software is printed Complete automatic stop.

Embodiment 3: As shown in Figure 5, the present invention specifically discloses a 3D printing process of a cylinder, including:

1. The cylinder is stereoscopically imaged by the scanner to form a 3D image in the slicing software of the 3D printer, and the wall thickness of the cylinder and the angle of the outer contour surface of the cylinder changing from bottom to top are stored at the same time;

2. Scale and repair the imaged 3D image to ensure that all points on the image can be projected on the base plate;

3. The slicing software slices the imaged 3D image, and the slice thickness is 0.2mm to 0.3mm (the diameter of the print head is about 0.2mm);

4. Perform cylindrical projection on the first slice perpendicular to the printer, and form a projected image area 5 on the bottom plate of the nozzle device, as shown in Figure 5;

5. The outer contour parameters of the cylinder are analyzed and processed by the 3D printer processor to determine the width of the latex support required outside the projected image area under the first slice, and determine the latex extrusion area 6, as shown in Figure 5;

6. There are a total of 16 grid areas on the base plate that have projected image areas or latex extrusion areas. Therefore, select the grid areas with projections on the base plate and determine the projection image area 5 and latex extrusion area 6 on the base plate. nozzle work;

7. The motor outputs power to the 16 nozzles that control the 16 grid areas, and controls the 16 nozzles to print sequentially from left to right and from top to bottom in their corresponding grid areas. Each of the 16 nozzles The printing process is consistent;

8. During the printing process of the 16 nozzles in their corresponding grid areas, when printing to the latex extrusion area 6, the latex nozzles are opened to perform latex extrusion; when printing to the projected image area 5, the raw material nozzles are opened to perform raw material extrusion out. The projected image area or latex extrusion area in the grid line area between two adjacent grid areas is printed by the nozzle on its left or upper side, and the printing width of the grid line area can be set as the nozzle diameter Multiples of ; the above printing method ensures that the width of the grid line area between adjacent grid areas is overlapped, ensures the perfect connection between adjacent grid areas, and avoids gaps at the grid line parts;

9. After the first slice of the slicing software is printed, lift the nozzle of the columnar projection; after the printed material is solidified, the slicing software will provide the next slice image, and the cycle will work until the last slice in the 3D slicing software is printed automatically. stop.

The nozzle device and 3D printing method for realizing parallel printing disclosed in the present invention distribute a plurality of nozzles uniformly on the bottom plate, and each nozzle controls the printing of a designated grid area, and the printing area controlled by each nozzle is the grid area corresponding to each nozzle. The area in the grid area and the grid line area on the right and lower sides of the grid area; it ensures the perfect connection between adjacent grid areas when the nozzle prints in the grid area, and avoids two adjacent grids. Gaps are created between regions. At the same time, each nozzle has a raw material nozzle and a latex nozzle at the same time; in the grid area with pixels, the raw material nozzle of the corresponding nozzle performs raw material extrusion; the latex extrusion area is determined according to the outer contour parameters outside the projected image area, and through the latex The nozzle is used for latex extrusion; the width of the extruded latex is determined by the outer contour size of the scanned object to ensure that the latex of two adjacent layers of slices can be bonded to each other; the above structure can realize parallel printing of 3D printers, ensuring the printing of raw materials and latex support. At the same time, the printing speed is improved; at the same time, because only the outside of the slice image needs to be supported, and the inside is not supported, the purpose of this is to achieve a more perfect three-dimensional presentation, reduce the weight of the printed item, and change the previous internal material support. Disadvantages Realize hollow printing; use water-soluble latex as the support material, water-soluble latex has the function of support and slight paste; after the printing is completed, the thicker gel support on the outside can be peeled off with slight force and attached to the corner of the printed object The gel at the center dissolves simply by soaking in tap water, so you don't need to apply too much force to remove fine parts of the support material.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. the ejecting device realizing parallel printing, it is characterised in that include base plate and multiple shower nozzle；

Multiple described shower nozzles are distributed on described base plate, described base plate divides the net region having area equation, is provided with a shower nozzle in each described net region；

Described shower nozzle is provided with raw material nozzles and latex nozzle。

2. realize the ejecting device of parallel printing as claimed in claim 1, it is characterised in that the print area that each described shower nozzle controls includes on the right side of area in the net region that each described shower nozzle is corresponding and net region, the grid lines region area of downside。

3. realize the ejecting device of parallel printing as claimed in claim 1, it is characterised in that also including motor, described motor is connected with all described shower nozzles, for controlling described shower nozzle in the net region that it is corresponding from left to right, from top to bottom print successively。

4. one kind uses the 3D Method of printing that the ejecting device as according to any one of claim 1-3 realizes parallel printing, it is characterised in that comprise the following steps:

Step one, the object printed being needed in the Slice Software of 3D printer by scanner three-dimensional imaging, storage simultaneously needs the outline parameter of printing objects；

The 3D rendering of imaging is cut into slices by step 2, Slice Software；

Step 3, the printing base plate that first section be perpendicular to printer carry out column projection, form projected image area on the base plate of ejecting device；

Step 4, outside projected image area according to described outline parameter determine latex extrusion region；

The shower nozzle corresponding to region extruded by projected image area and latex on step 5, selection base plate, and starts；

The shower nozzle that step 6, motor control to be activated carries out linear print in the net region of its correspondence from left to right, from top to bottom prints successively, and the shower nozzle being activated includes: raw material nozzles, latex nozzle；

Step 7, in projected image area, raw material nozzles extrusion raw material；Extrude in region at latex, latex nozzle extrusion latex；

Step 8, first of Slice Software section printing complete；After printed material solidifies, Slice Software provides next slice map, and periodic duty is until last section printing in 3D Slice Software completes to be automatically stopped。

5. realize the 3D Method of printing of parallel printing as claimed in claim 4, it is characterised in that also include between step one and step 2:

Step 9,3D rendering to imaging zoom in and out and repair。

6. realizing the 3D Method of printing of parallel printing as claimed in claim 4, it is characterised in that in described step one, the 3D stereo-picture formed in Slice Software is an image closed, and described outline parameter includes wall thickness, coordinate and angle。

7. realizing the 3D Method of printing of parallel printing as claimed in claim 4, it is characterised in that in described step 2, the slice thickness that the 3D rendering of imaging is cut into slices by Slice Software is 0.2mm～0.3mm。

8. realizing the 3D Method of printing of parallel printing as claimed in claim 4, it is characterised in that in described step 7, water soluble latex selected by described latex。

9. realize the 3D Method of printing of parallel printing as claimed in claim 4, it is characterised in that described step 4 includes:

Outline parameter is passed through analysis and the process of 3D printer processor, it is judged that the width of latexes needed for the lower projected image area of different sections is outside, it is determined that latex extrusion region。