阅读说明：本技术 一种磁活性复合材料结构打印装置 (Magnetic activity combined material structure printing device ) 是由 吴德志 王中宝 吴益根 于 2020-11-16 设计创作，主要内容包括：本发明公开了一种磁活性复合材料结构打印装置,该装置包括电机驱动电源、高压直流电源、励磁电源、电机、转针、储料筒、收集器及水平运动平台,转针的一端与电机的输出轴同轴连接且另一端置于储料筒内,储料筒远离转针的一端具有一供筒内液体流出的喷嘴,收集器置于喷嘴下方并固定在水平运动平台上,储料筒的外周设有环其缠绕的励磁线圈,高压直流电源的正负输出端分别通过导体连接至储料筒和收集器,电机驱动电源电性连接电机,励磁电源电性连接励磁线圈。它具有如下优点：克服磁性复合材料分散不均匀、不连续、提前固化等缺陷,克服定向链化不充分、不均匀、不连续的弊端,实时改变磁极方向。(The invention discloses a printing device with a magnetic active composite material structure, which comprises a motor driving power supply, a high-voltage direct-current power supply, an excitation power supply, a motor, a rotating needle, a storage barrel, a collector and a horizontal motion platform, wherein one end of the rotating needle is coaxially connected with an output shaft of the motor, the other end of the rotating needle is arranged in the storage barrel, one end of the storage barrel, which is far away from the rotating needle, is provided with a nozzle for liquid in the barrel to flow out, the collector is arranged below the nozzle and fixed on the horizontal motion platform, the periphery of the storage barrel is provided with an excitation coil wound by the ring, the positive output end and the negative output end of the high-voltage direct-current power supply are respectively connected to the storage barrel. It has the following advantages: the defects of uneven dispersion, discontinuity, advanced curing and the like of the magnetic composite material are overcome, the defects of insufficient, uneven and discontinuity of directional chain are overcome, and the magnetic pole direction is changed in real time.)

1. A kind of magnetic activity composite material structure printing device, characterized by that: including motor drive power supply, high voltage direct current power supply, excitation power supply, including a motor, an end cap, a controller, and a cover plate, the needle changes, the storage cylinder, the collector and can be along horizontal plane violently, the horizontal motion platform of vertical direction motion, the one end of needle changes and the output shaft coaxial coupling of motor and the other end is arranged in the storage cylinder, the one end that the storage cylinder kept away from the needle changes has a nozzle that supplies the interior liquid outflow of section of thick bamboo, the collector is arranged in the nozzle below and is fixed on the horizontal motion platform, the fixed excitation coil that is equipped with in periphery of storage cylinder, high voltage direct current power supply's positive and negative output is connected to storage cylinder and collector respectively through the conductor and in order to form high-voltage electric field between storage.

2. A magnetically active composite structure printing apparatus as claimed in claim 1, wherein: the central axis of the rotating needle is coincident with the central axis of the material storage cylinder.

3. A magnetically active composite structure printing apparatus as claimed in claim 1, wherein: the winding direction of the excitation coil is vertical to the central axis of the storage cylinder.

4. A magnetically active composite structure printing apparatus as claimed in claim 1, wherein: the excitation power supply adopts a programmable double-frequency power supply.

5. A magnetically active composite structure printing apparatus as claimed in claim 1, wherein: the rotating needle is connected with the output shaft of the motor through a coupling.

6. A magnetically active composite structure printing apparatus as claimed in claim 1, wherein: the motor is a direct current stepping motor.

7. A magnetically active composite structure printing apparatus as claimed in claim 1, wherein: the number of turns of the exciting coil is more than one turn, and the exciting current is 0-10 amperes.

8. A magnetically active composite structure printing apparatus as claimed in claim 1, wherein: the shaft sleeve is fixed to the outer peripheral wall of the material storage cylinder, and the magnet exciting coil is wound on the shaft sleeve.

9. A magnetically active composite structure printing apparatus as claimed in any one of claims 1 to 8, wherein: still include the elevating platform, this elevating platform has two mounting fixtures of height-adjustable, and this motor and storage cylinder are fixed respectively on two mounting fixtures.

10. A printing method for a magnetic active composite material structure is characterized by comprising the following steps: a magnetically active composite structure printing apparatus based on any one of claims 1 to 9; the method comprises the following steps:

(1) stirring and scattering the magnetic composite material in the material storage cylinder by rotating the rotating needle, so that capillary tube rheological and shear thinning are formed between the composite material and the rotating needle;

(2) the magnetic particles in the storage cylinder are directionally arranged through the excitation coil;

(3) the composite material in the storage cylinder is sprayed on the collector in a micro-jet state through the nozzle by a high-voltage electric field supplied by a high-voltage direct-current power supply and is deposited and solidified on the collector;

(4) the magnetic pole direction of the printed magnetic composite material structure is changed by changing the current direction of the exciting coil or controlling the motion direction of the horizontal motion platform.

Technical Field

The invention relates to a printing device for a magnetic activity composite material structure.

Background

Magnetic actuation based on magnetically active composites is a promising emerging actuation method because it is a non-contact form of energy transfer, which allows unconstrained control, and is considered a sterile actuation method for biomedical applications. Has important application prospect in the fields of micro soft robots and micro-fluidic chips for medical application such as drug delivery, minimally invasive surgery and the like.

The Magnetic Active Elastomer (MAEs) is a common magnetic active composite material, and is a magnetic active elastic mixture mainly prepared by dispersing magnetic micro-nano particle fillers (such as neodymium iron boron, ferroferric oxide particles and the like) into soft elastomer materials (such as Ecof ex, PDMS and the like). The magnetic active elastomer is induced by an external magnetic field to generate deformation motions such as elongation, contraction, bending and the like. The magnetization of the filler, the drive signal and the overall shape are the main parameters affecting the deformation mode of the magnetically active elastomer. Due to the characteristics of simplicity, remote and reversible actuation, the magnetic active elastomer is an ideal material for a micro-scale soft body robot applied to a closed space or an aggregation environment (such as an interventional medical scene or a minimally invasive surgery), and therefore has potential application value in the fields of biomedicine and the like.

At present, the manufacturing method of the magnetic active composite material structure mainly comprises the steps of manually dispersing magnetic micro-nano particles (such as neodymium iron boron and ferroferric oxide particles) into a soft elastomer material, stirring, and curing in a strong magnetic field environment to obtain the magnetic active elastomer functional structure. However, this manufacturing method has some disadvantages, such as uneven dispersion and easy agglomeration of the magnetic particles in the soft elastic material, and curing under a strong magnetic field environment easily leads to insufficient, uneven and discontinuous functional orientation and linking of the magnetic particles, thereby leading to poor deformation capability of the magnetically active elastomer under the induction of an external magnetic field.

Disclosure of Invention

The present invention provides a printing apparatus for magnetically active composite structures that overcomes the deficiencies of the prior art described in the background.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a magnetic activity combined material structure printing device, it includes motor drive power supply, high voltage direct current power supply, excitation power supply, including a motor, an end cap, a controller, and a cover plate, the needle changes, the storage section of thick bamboo, the collector reaches the horizontal motion platform that can be along horizontal plane horizontal, the vertical direction motion, the one end of needle changes and the output shaft coaxial coupling of motor and the other end is arranged in the storage section of thick bamboo, the one end that the needle was kept away from to the storage section of thick bamboo has a nozzle that supplies the interior liquid outflow of section of thick bamboo, the collector is arranged in the nozzle below and is fixed on the horizontal motion platform, the periphery of storage section of thick bamboo is fixed around being equipped with excitation coil, high voltage direct current power supply's positive negative output is connected to storage section of thick bamboo.

In one embodiment: the central axis of the rotating needle is coincident with the central axis of the material storage cylinder.

In one embodiment: the winding direction of the excitation coil is vertical to the central axis of the storage cylinder.

In one embodiment: the excitation power supply adopts a programmable double-frequency power supply.

In one embodiment: the rotating needle is connected with the output shaft of the motor through a coupling.

In one embodiment: the motor is a direct current stepping motor.

In one embodiment: the nozzle is in a cone shape with gradually closing up.

In one embodiment: the shaft sleeve is fixed to the outer peripheral wall of the material storage cylinder, and the magnet exciting coil is wound on the shaft sleeve.

In one embodiment: the number of turns of the exciting coil is more than one turn, and the exciting current is 0-10 amperes.

In one embodiment: still include the elevating platform, this elevating platform has two mounting fixtures of height-adjustable, and this motor and storage cylinder are fixed respectively on two mounting fixtures.

A printing method of a magnetic activity composite material structure is based on the printing device of the magnetic activity composite material structure; the method comprises the following steps:

(1) stirring and scattering the magnetic composite material in the material storage cylinder by rotating the rotating needle, so that capillary tube rheological and shear thinning are formed between the composite material and the rotating needle;

(2) the magnetic particles in the storage cylinder are directionally arranged through the excitation coil;

(3) the composite material in the storage cylinder is sprayed on the collector in a micro-jet state through the nozzle by a high-voltage electric field supplied by a high-voltage direct-current power supply and is deposited and solidified on the collector;

(4) the magnetic pole direction of the printed magnetic composite material structure is changed by changing the current direction of the exciting coil or controlling the motion direction of the horizontal motion platform.

Compared with the background technology, the technical scheme has the following advantages:

1. according to the invention, the rotating needle is driven by the motor to rotate to stir the high-viscosity magnetic composite material in the material storage cylinder at a high speed, so that capillary tube rheology and shear thinning are formed between the composite material and the rotating needle, thus the surface tension of the magnetic composite material is reduced, the defects of uneven dispersion, discontinuity, advanced solidification and the like of the magnetic composite material are overcome, meanwhile, the scattered magnetic composite material flows out from the nozzle to realize liquid supply, the liquid supply speed is changed by adjusting the rotating speed of the rotating needle, and the liquid supply and stirring dispersion are realized.

2. The invention uses the electric field jet flow curing mode instead to avoid the defects of insufficient, uneven and discontinuous functional directional chaining of magnetic particles in the composite material.

3. The excitation coil is electrified, a directional magnetic field is generated inside, and the magnetic particles of the composite material in the storage cylinder are aligned in a reorientation mode along the direction of the magnetic field.

4. The current direction of the exciting coil can be controlled by supplying power to the exciting coil through the programmable double-frequency power supply, so that the magnetic pole direction of the printed magnetic active composite material structure device can be controlled in real time.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic structural diagram of a printing apparatus with a magnetic active composite structure according to this embodiment.

Fig. 2 is a schematic diagram of the operation of the printing apparatus for a magnetic active composite structure according to this embodiment.

Detailed Description

Referring to fig. 1, a printing apparatus for a magnetic active composite material structure includes a motor driving power supply 1, a high voltage dc power supply 13, an excitation power supply 7, a motor 2, a rotating needle 4, a storage cylinder 5, a collector 10, and a horizontal moving platform 11 capable of moving along horizontal and vertical directions of a horizontal plane.

One end of the rotating needle 4 is coaxially connected with the output shaft of the motor 2, the other end of the rotating needle is arranged in the material storage cylinder 5, the rotating needle 4 is connected with the output shaft of the motor 2 through the coupler 3, and in the embodiment, the central axis of the rotating needle 4 coincides with the central axis of the material storage cylinder 5.

The end of the material storage cylinder 5 far away from the rotating needle 4 is provided with a nozzle 9 for the liquid in the cylinder to flow out, in this embodiment, the nozzle 9 is in a cone shape with a gradually closing-up. A collector 10 is placed below the nozzle 9 and fixed to a horizontally moving platform 11, the collector 10 typically being a heatable collector.

The outer periphery of the material storage cylinder 5 is fixedly wound with an excitation coil 6, generally, the winding number of the excitation coil 6 is more than one turn, and the excitation current is 0-10 amperes. The winding direction of the excitation coil 6 is vertical to the central axis of the storage cylinder 5. In this embodiment, the excitation coil 6 is wound by using 0.35mm enameled wire, the number of turns is 700 turns, the inner diameter is 10mm, and the outer diameter is 30 mm. The shaft sleeve 8 is fixed to the outer peripheral wall of the material storage cylinder 5, and the excitation coil 6 is wound on the shaft sleeve 8.

The positive and negative output ends of a high-voltage direct current power supply 13 (such as model LWRC2020P10-150) are respectively connected to the storage cylinder 5 and the collector 10 through conductors to form a high-voltage electric field between the storage cylinder 5 and the collector 10, the motor driving power supply 1 is electrically connected with the motor 2 to supply power to the motor, and the excitation power supply 7 is electrically connected with the excitation coil 6. In this embodiment, the excitation power supply 7 is a programmable dual-frequency power supply (for example, model N8350), and the motor 2 is a dc stepping motor.

The rotating needle 4, the shaft sleeve 8, the material storage barrel 5, the nozzle 9 and the collector 10 are all made of non-magnetic materials, and can be made of, but not limited to, photosensitive resin, PET plastic and the like.

The printing device further comprises a lifting platform 12, the lifting platform is provided with two fixing fixtures 121 and 122 with adjustable height, and the motor 2 and the material storage cylinder 5 are respectively fixed on the two fixing fixtures 121 and 122. The two-dimensional printing on the horizontal plane of the magnetic composite material structure can be realized through the horizontal movement platform 11, the height of the storage barrel 5 and/or the motor 2 is controlled through the height adjustment of the two fixing clamps 121 and 122 through the lifting platform 12, so that the printing in the height direction of the magnetic composite material structure is realized, and finally, the three-dimensional printing is realized. The lifting table 12 can adopt a double-station precise lifting table to realize the respective control of the heights of the motor and the material storage cylinder.

A printing method of a magnetic activity composite material structure is based on the printing device of the magnetic activity composite material structure; the method comprises the following steps:

(1) stirring and scattering the magnetic composite material in the material storage cylinder by rotating the rotating needle, so that capillary tube rheological and shear thinning are formed between the composite material and the rotating needle;

(2) the magnetic particles 14 in the storage cylinder are directionally arranged through the excitation coil;

(3) the composite material in the storage cylinder is sprayed on the collector in a micro-jet state through the nozzle by a high-voltage electric field supplied by a high-voltage direct-current power supply and is deposited and solidified on the collector;

(4) the magnetic pole direction of the printed magnetic composite material structure is changed by changing the current direction of the exciting coil or controlling the motion direction of the horizontal motion platform.

Referring to fig. 2, the printing process of the printing apparatus based on the magnetic active composite material structure according to the embodiment is as follows: the magnetic composite material with the magnetic particles 14 is filled in the storage cylinder 5, the programmable dual-frequency power supply supplies 0-3A current to the excitation coil 6, and a directional magnetic field is generated inside the coil, so that the magnetic particles 14 (ferroferric oxide particles with the diameter of about 5 microns) in the composite material inside the storage cylinder 5 are rearranged along the direction B of the magnetic field; meanwhile, the direct current stepping motor drives the rotary needle to rotate at a high speed, so that the composite material in the material storage cylinder 5 flows out from the nozzle 9 to realize liquid supply, and the nozzle 9 generates micro jet flow and deposits and solidifies on the heatable collector under the action of a strong electric field generated by the high-voltage direct current power supply 13. The liquid supply speed is changed by adjusting the rotating speed of the rotating needle 4, and the magnetic pole direction of the printed magnetically active composite material structure can be controlled by controlling the current direction of the exciting coil 6 or the moving direction of the horizontal moving platform 11 through a programmable double-frequency power supply. In order to realize intelligent manufacturing, the horizontal motion platform 11 can be connected with and controlled by an intelligent control module, so that the programmable control printing of the patterned magnetically active composite material structure is realized, the production efficiency of the magnetically active composite material structure is improved, and the manufacturing cost is reduced.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.