阅读说明：本技术 微变打印装置及打印方法 (Micro-variation printing device and printing method ) 是由 何燕 楚电明 白文娟 谢庚辰 董乾鹏 叶明瑞 于 2021-09-15 设计创作，主要内容包括：本申请公开了一种微变打印装置及打印方法,属于增材制造领域。用于改变打印材料的形状与体积,其特征在于,所述装置与运动平台连接,所述装置包括喷头组件、旋转组件,所述旋转组件与所述喷头组件连接,所述喷头组件相对于所述旋转组件做旋转运动,所述喷头组件包括挤压单元、本体,所述挤压单元至少部分地处于所述本体内侧,所述挤压单元包括A模和B模,所述A模和所述B模相对运动,打印物料经过所述挤压单元由所述喷头组件非圆形喷嘴挤出基本单元,所述喷头组件具有不同规格,改变所述喷头组件旋转速度和/或规格,以打印出具有重复基本单元的不同结构形状与体积的物体。本发明具有快速、简单控制打印形状及打印体积有益效果。(The application discloses a micro-variation printing device and a printing method, and belongs to the field of additive manufacturing. The device is used for changing the shape and the volume of a printing material and is characterized in that the device is connected with a moving platform, the device comprises a spray head assembly and a rotating assembly, the rotating assembly is connected with the spray head assembly, the spray head assembly performs rotating motion relative to the rotating assembly, the spray head assembly comprises an extrusion unit and a body, the extrusion unit is at least partially arranged on the inner side of the body, the extrusion unit comprises an A die and a B die, the A die and the B die move relatively, the printing material passes through the extrusion unit and is extruded out of a basic unit by a non-circular nozzle of the spray head assembly, the spray head assembly has different specifications, and the rotating speed and/or the specification of the spray head assembly are changed so as to print objects with different structural shapes and volumes of repeated basic units. The invention has the advantages of rapid and simple control of printing shape and printing volume.)

1. A micro-variation printing device for changing the shape and volume of a printing material, characterized in that the device is connected with a moving platform (40), the device comprises a spray head component (10) and a rotating component (20), the rotating component (20) is connected with the spray head component (10), and the spray head component (10) rotates relative to the rotating component (20);

the spray head assembly (10) comprises an extrusion unit (30) and a body (11), wherein the extrusion unit (30) is at least partially arranged inside the body (11), the extrusion unit (30) comprises an A die (31) and a B die (32), and the A die (31) and the B die (32) move relatively;

the printing material passes through the extrusion unit (30) and is extruded out of the basic unit by the non-circular nozzle of the spray head assembly (10), the spray head assembly (10) has different specifications, and the rotating speed and/or the specification of the spray head assembly (10) are/is changed so as to print objects with different structural shapes and volumes of repeated basic units.

2. The micro-variation printing apparatus according to claim 1, wherein the nozzle shape of the nozzle assembly (10) is a non-circular structure, such as: rectangle, wave, semicircle.

3. The micro-variation printing device according to claim 1, wherein the head assembly (10) has at least one specification, the specification including varying at least one of a variable amount of the pressing unit (30), an eccentric amount of the head assembly (10);

the variable quantity means that the A die (31) and the B die (32) change at least one of shape, surface pattern and extrusion distance;

the eccentricity is a certain distance between the geometric center of the nozzle of the spray head component (10) and the rotating shaft of the spray head component (10), and the distance is equal to zero or larger than zero.

4. The micro-variation printing device according to claim 1, wherein the basic unit is a unit formed by extrusion by moving the extrusion unit (30) for one cycle;

the repeated basic unit refers to an object which is composed of basic units and formed by the rotation of the spray head assembly (10) and the track motion of the motion platform (40).

5. The micro-variation printing device according to claim 1, wherein the shape structure refers to a shape printed by different rotating speeds and/or specifications of the nozzle assembly (10), such as: DNA structure, DNA non-helical structure;

the different volumes refer to different sized volumes created by the rotational speed and/or specification of the spray head assembly (10).

6. The micro-variation printing device according to claim 1, wherein the pressing unit (30) further comprises a driving device (33), and the driving device (33) drives at least one of the a die (31) and the B die (32) to move relatively.

7. The micro-printing device according to claim 1, wherein the rotating assembly (20) comprises a rotary power device (21), the rotary power device (21) being connected with the body (11);

the body (11) is driven by the rotary power device (21) to rotate around the rotating shaft.

8. The micro-variable printing device according to claim 1, wherein the nozzle assembly (10) further comprises a temperature regulating assembly (12), the temperature regulating assembly (12) being configured to regulate a temperature of the printing material within the body (11);

the temperature adjusting component (12) comprises a temperature adjusting unit (121) and a temperature measuring unit (122), the temperature measuring unit (122) feeds the detected temperature value back to the temperature adjusting unit (121), and the temperature adjusting unit (121) adjusts the temperature value to reach the required temperature.

9. A method of micro-printing, the method comprising: printing materials pass between the die A (31) and the die B (32) and are extruded into a required shape structure, the extruded printing materials are extruded to form a basic unit through a nozzle of the spray head assembly (10), the spray head assembly (10) rotates around a rotating shaft, and the speed and/or specification of the spray head assembly (10) are/is changed to print objects with different shape structures and volumes of repeated basic units.

Technical Field

The application belongs to the field of additive manufacturing, and particularly relates to a micro-variable printing device and a printing method.

Background

The current 3D printing technology is widely applied to the fields of national defense strategies and civil life, wherein the printing of objects consisting of micro-scale units is long in time consumption, low in precision and high in difficulty; and the printing of large-volume objects by using small-volume materials can be widely applied to special industries such as wearing, biology, gas storage, heat dissipation and the like.

In the prior art, the variable volume printing technique is realized by changing material properties, such as adding swelling agents and the like, and realizing an object with a porous structure by planning a printing path.

Therefore, the method changes thinking, and quickly and accurately realizes the pore structure object consisting of the customizable tiny basic units, thereby having important significance for various industries, particularly military industry.

Disclosure of Invention

The embodiment of the application aims to provide a micro-deformation printing device and a printing method, and the problem that a variable-volume deformable object in the prior art is long in time consumption and high in difficulty can be solved.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a micro-variable printing apparatus, where the apparatus is connected to a motion platform, and the apparatus includes a nozzle assembly and a rotating assembly, where the rotating assembly is connected to the nozzle assembly, and the nozzle assembly rotates relative to the rotating assembly;

the spray head assembly comprises an extrusion unit and a body, wherein the extrusion unit is at least partially positioned inside the body, the extrusion unit comprises an A die printing and a B die, and the A die and the B die move relatively;

the printing material passes through the extrusion unit and is extruded out of the basic unit by the non-circular nozzle of the spray head assembly, the spray head assembly has different specifications, and the rotating speed and/or specification of the spray head assembly are/is changed so as to print objects with different structural shapes and volumes of the repeated basic unit.

In a second aspect, the present disclosure provides a method for micro-variable printing, in which a printing material is extruded between a die a and a die B into a desired shape structure, the extruded printing material is extruded through a nozzle of a nozzle assembly to form a basic unit, the nozzle assembly performs a rotational motion around a rotational axis, and a speed and/or specification of the nozzle assembly is changed to print out an object with different shape structures and volumes of the repeated basic unit.

In the embodiment of the application, the arrangement of the extrusion units is beneficial to controlling and realizing the shape of the basic unit, and the extrusion units with different specifications are replaced to realize different structural shapes. The nozzle shape and the eccentricity of the spray head assembly are set, so that the initial control of the rotation diameter of the basic unit is facilitated, the change of the rotation speed of the spray head assembly is facilitated, and the size change of the rotation diameter is facilitated to be controlled, so that the volume change of a printed object is realized. Specifically, the extrusion unit can rapidly form basic units with special shapes such as DNA molecular structures, tire patterns and the like. The embodiment of the application has the beneficial effects of being fast, simple and accurate in control, printing shape and printing volume.

Drawings

FIG. 1 is a schematic overall view of a micro-printing apparatus according to one embodiment of the present application;

FIG. 2 is a schematic diagram of a micro-printing apparatus according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a showerhead assembly according to one embodiment of the subject application;

fig. 4 is a schematic flow chart of a variable volume printing method in the embodiment of the present application.

Description of reference numerals:

10. a showerhead assembly; 11. a body; 12. a temperature regulating component; 121. a temperature adjusting unit; 122. a temperature measuring unit; 20. a rotating assembly; 21. a rotary power device; 30. a pressing unit; 31. a, molding; 32. b, molding; 33. a drive device; 40. and (4) moving the platform.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The present invention provides a method and an apparatus for printing a micro-image on a printing medium, which can be applied to a printing apparatus.

Referring to fig. 1 to 3, an embodiment of the present application provides a micro-variation printing apparatus for changing the shape and volume of a printing material, wherein the apparatus is connected to a moving platform 40, the apparatus includes a nozzle assembly 10 and a rotating assembly 20, the rotating assembly 20 is connected to the nozzle assembly 10, and the nozzle assembly 10 performs a rotating motion relative to the rotating assembly 20;

the spray head assembly 10 comprises an extrusion unit 30 and a body 11, wherein the extrusion unit 30 is at least partially arranged inside the body 11, the extrusion unit 30 comprises an A die 31 and a B die 32, and the A die 31 and the B die 32 move relatively;

the printing material passes through the extrusion unit 30 and is extruded out of the basic unit by the non-circular nozzle of the spray head assembly 10, the spray head assembly 10 has different specifications, and the rotating speed and/or the specification of the spray head assembly 10 are/is changed so as to print objects with different structural shapes and volumes of repeated basic units.

In the embodiment of the application, the arrangement of the extrusion units is beneficial to controlling and realizing the shape of the basic unit, and the extrusion units with different specifications are replaced to realize different structural shapes. The nozzle shape and the eccentricity of the spray head assembly are set, so that the initial control of the rotation diameter of the basic unit is facilitated, the change of the rotation speed of the spray head assembly is facilitated, and the size change of the rotation diameter is facilitated to be controlled, so that the volume change of a printed object is realized. Specifically, the extrusion unit can rapidly form basic units with special shapes such as DNA molecular structures, tire patterns and the like. The embodiment of the application has the beneficial effects of being fast, simple and accurate in control, printing shape and printing volume.

It should be noted that the moving platform 40 may be a three-degree-of-freedom platform of a 3D printer, a multiple-degree-of-freedom platform such as a robot, or other degree-of-freedom platforms, and the platform may provide a path support for material printing.

It should be noted that the body 11 is detachable, so as to facilitate the installation of the extruding unit 30, and the nozzle is located on the body and can be replaced.

It should be noted that, the relative movement between the a mold 31 and the B mold 32 refers to the relative movement or rotation between the two, for example: the a die 31 and the B die 32 are two rotating wheels respectively, and then the two rotating wheels rotate reversely, and if the a die 31 and the B die 32 are two flat plates respectively, then the two rotating wheels translate reversely, so that a co-extrusion effect is realized.

It should be noted that, in the technical scheme, material characteristics and a track are not considered, a printed entity contains air holes, the volume is increased, and the printing speed is high and simple.

It should be noted that, because the basic unit structure of the technical solution is small, and the overall structure is composed of repeated basic units, the basic units can be precisely controlled to realize the control of the overall structure.

Optionally, the nozzle shape of the spray head assembly 10 is a non-circular structure, such as: rectangle, wave, semicircle.

It should be noted that the nozzle shape of the nozzle assembly 10 is determined by the extruding unit 30, so as to facilitate the extrusion of the printing material;

it should be noted that, when the nozzle is rectangular, the geometric center of the nozzle is located at the intersection of the diagonals, and other complicated shapes can be judged according to a mathematical method.

Optionally, the spray head assembly 10 has at least one specification including at least one of varying a variable amount of the squeeze unit 30, an amount of eccentricity of the spray head assembly 10;

the variable quantity means that the A die 31 and the B die 32 change at least one of the shape, the surface pattern and the extrusion distance;

the eccentricity is a distance between the geometric center of the nozzle of the spray head assembly 10 and the rotation axis of the spray head assembly 10, and the distance is equal to zero or greater than zero.

The shape change means that the shapes of the a die and the B die can be changed, for example, the shape change means that the a die and the B die are changed into a roller, a flat plate, a curved plate, a roller and curved plate, and the like.

The surface pattern means that the lines of the contact surfaces of the A die and the B die are different, the lines of the surfaces are changed to form different basic units, and the A die and the B die can be formed by a female die and a male die, or both the A die and the B die can be smooth in surface or one of the A die and the B die is smooth in surface.

The extrusion distance is the shortest distance between the a die and the B die, which are relatively close to each other.

It should be noted that the measurement of the eccentricity is the distance from a point to a straight line, and when the distance is zero, the eccentricity is not generated, and when the distance is greater than zero, the eccentricity is generated, and different values, that is, the eccentricity is different.

Alternatively, the basic unit refers to a unit formed by extrusion by moving the extrusion unit 30 for one cycle;

the repeating basic unit is an object which is composed of basic units and formed by the rotation of the spray head assembly 10 and the track motion of the motion platform 40.

It should be noted that, the one-cycle movement of the pressing unit 30 means that the a die and the B die rotate or translate simultaneously for one cycle, and the one cycle of the repeated movement is repeated.

It should be noted that the rotational movement of the spray head assembly 10 can perform the screwing winding of the base unit, and the winding structure is different at different rotational speeds.

It should be noted that, the movement of the moving platform (40) can form the basic unit into a certain track, and the track can be one-dimensional, two-dimensional or three-dimensional.

Alternatively, the shape structure refers to a shape printed by different rotating speeds and/or specifications of the head assembly 10, such as: DNA structure, DNA non-helical structure.

The different volumes refer to different sized volumes created by the rotational speed and/or specification of the spray head assembly 10.

The shape structure may be formed into different shapes according to different speeds, or may be influenced by different specifications or both, and the volume is determined according to the volume size of the printed object.

Optionally, the pressing unit 30 further includes a driving device 33, and the driving device 33 drives at least one of the a die 31 and the B die 32 to move relatively.

It should be noted that the relative movement may be a rotational movement or a movement.

Optionally, the rotating assembly 20 comprises a rotating power device 21, the rotating power device 21 is connected with the body 11;

the body 11 is driven by the rotary power device 21 to rotate around the rotating shaft.

The rotation axis refers to a rotation axis of the main body 11.

Optionally, the nozzle assembly 10 further includes a temperature adjusting assembly 12, and the temperature adjusting assembly 12 is configured to adjust the temperature of the printing material in the body 11;

the temperature adjusting assembly 12 comprises a temperature adjusting unit 121 and a temperature measuring unit 122, wherein the temperature measuring unit 122 feeds back the detected temperature value to the temperature adjusting unit 121, and the temperature is adjusted by the temperature adjusting unit 121 to reach the required temperature.

It should be noted that the temperature adjusting unit 121 may be a temperature increase or a temperature decrease, for example: the unmelted printing material may be gradually melted as the temperature is increased, and the melted printing material gradually forms a solid or semi-solid as the temperature is decreased.

Referring to fig. 4, an embodiment of the present application further provides a method for micro-printing, where the method for printing includes: printing materials pass between the A die 31 and the B die 32 and are extruded into a required shape structure, the extruded printing materials are extruded through a nozzle of the spray head assembly 10 to form a basic unit, the spray head assembly 10 rotates around a rotating shaft, and the speed and/or specification of the spray head assembly 10 are changed to print objects with different shape structures and volumes of repeated basic units.

Step S101: the printing material passes through the space between the A die 31 and the B die 32 and is extruded into a required shape structure;

opening the drive 33 moves at least one of the a die 31 and the B die 32 and extrudes the printing material into a desired shape configuration, such as: cuboid, H-shaped, I-shaped, X-shaped and other different structural shapes.

Step S102: the spray head assembly 10 rotates around a rotating shaft and prints along a track;

the rotary power device 21 is turned on to make the spray head assembly 10 rotate, and the motion platform provides a path planning track to form a specific structure.

Step S103: varying the speed and/or specification of the spray head assembly 10 to print out objects of different shapes, configurations and volumes having repeating basic units;

the speed of the nozzle assembly 10 is changed, the specification of the nozzle assembly 10 is changed or the two are changed simultaneously so as to print out objects with different shapes, structures and volumes, the rotating speed is accelerated, the winding of the basic unit is accelerated, the eccentric amount is increased, the volume is increased under the condition that other variables are not changed, and the extrusion unit is changed to replace different shapes and structures.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.