阅读说明：本技术 一种用于熔融沉积打印陶瓷的丝材及其制备技术 (Wire for fused deposition printing ceramic and preparation technology thereof ) 是由 马涛 于 2021-07-31 设计创作，主要内容包括：本发明公开了一种用于熔融沉积打印陶瓷的丝材,包括陶瓷粉体、热塑性材料、粘结剂和分散剂,其中,陶瓷粉体体积分数为10-70％,热塑性材料体积分数为20-85％,粘结剂体积分数为5-10％,分散剂占陶瓷粉体的质量百分比0-3％。本申请中,通过选用合适的热塑性材料、分散剂和粘结剂可制得具有优异力学性能、粗细均匀的丝材,相比较于现有技术中的制备方式,本申请所采用的方法,操作简单,对设备要求低,制备周期短,易于存放。(The invention discloses a wire for fused deposition printing ceramic, which comprises ceramic powder, a thermoplastic material, a binder and a dispersant, wherein the volume fraction of the ceramic powder is 10-70%, the volume fraction of the thermoplastic material is 20-85%, the volume fraction of the binder is 5-10%, and the dispersant accounts for 0-3% of the mass of the ceramic powder. In this application, can make the silk material that has excellent mechanical properties, thickness are even through choosing suitable thermoplastic material, dispersant and binder, compare the preparation method among the prior art, the method that this application adopted, easy operation, it is low to the equipment requirement, preparation cycle is short, easily deposits.)

1. The wire for fused deposition printing of ceramics is characterized by comprising ceramic powder, a thermoplastic material, a binder and a dispersant, wherein the volume fraction of the ceramic powder is 10-70%, the volume fraction of the thermoplastic material is 20-85%, the volume fraction of the binder is 5-10%, and the dispersant accounts for 0-3% of the mass of the ceramic powder.

2. The wire for fused deposition printing ceramic of claim 1, wherein the ceramic powder is one of alumina, zirconia, silica, magnesia, spinel, carbide, nitride.

3. The wire for fused deposition printing ceramic according to claim 2, wherein the ceramic powder has a particle size of one of three grades, 100nm, 500nm and 1 μm.

4. A filament for fused deposition printing of ceramics according to claim 3, wherein the thermoplastic material is one or more of polyethylene, polypropylene, polystyrene, polycarbonate, polyamide.

5. The wire for fused deposition printing ceramic according to claim 4, wherein the binder is one or more of polyethylene glycol and paraffin wax.

6. A wire for fused deposition printing of ceramics according to claim 5,

the dispersing agent is one or more of polyvinyl alcohol, polyvinyl butyral and sodium dodecyl benzene sulfonate.

7. A technique for preparing a filament for fused deposition printing of ceramics according to claim 1, comprising the steps of:

a. adding ceramic powder, a thermoplastic material, a binder and a dispersant into a high molecular internal mixer for mixing, and setting the stirring speed at 150-;

b. and c, extruding the banburying material obtained in the step a at the temperature of 130-155 ℃ by an extruder at the speed of 1-5 m/min, drawing wires, winding to obtain a roll shape, and storing.

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to a wire for fused deposition printing of ceramics and a preparation technology thereof.

Background

The ceramic material has the advantages of high melting point, high hardness, good wear resistance, oxidation resistance and the like, can be applied to the fields of aerospace, daily products and the like, but has high processing difficulty and higher cost for ceramic parts with high precision and complex structures. The additive manufacturing technology can simply and automatically prepare products with various complex shapes, so that the forming problem of complex ceramic parts can be solved by combining the 3D printing technology and the ceramic material.

The existing 3D printing technology applied to ceramic part manufacturing has some defects and shortcomings, for example, photocuring molding raw materials and equipment are expensive, and raw materials are seriously wasted; the product prepared by ink-jet printing has low density and is easy to form cracks; selective laser sintering of printable material systems is less. The fused deposition technology only needs to mix the thermoplastic material and the ceramic powder to prepare the wire material, so the preparation cost is low and the storage is easy.

Therefore, fused deposition based printing technology has wide development prospect.

Disclosure of Invention

The invention aims to: to solve the above problems, a wire for fused deposition printing of ceramics and a technique for preparing the same are proposed.

In order to achieve the purpose, the invention adopts the following technical scheme:

a wire for fused deposition printing of ceramic comprises ceramic powder, a thermoplastic material, a binder and a dispersant, wherein the volume fraction of the ceramic powder is 10-70%, the volume fraction of the thermoplastic material is 20-85%, the volume fraction of the binder is 5-10%, and the dispersant accounts for 0-3% of the mass of the ceramic powder.

Preferably, the ceramic powder may be one of alumina, zirconia, silica, magnesia, spinel, carbide and nitride.

Preferably, the ceramic powder has one of three grades of 100nm, 500nm and 1 μm in particle size.

Preferably, the thermoplastic material is one or more of polyethylene, polypropylene, polystyrene, polycarbonate and polyamide.

Preferably, the binder is one or more of polyethylene glycol and paraffin.

Preferably, the dispersant is one or more of polyvinyl alcohol, polyvinyl butyral and sodium dodecyl benzene sulfonate.

A technique for preparing a wire for fused deposition printing of ceramics, comprising the steps of:

a. adding ceramic powder, a thermoplastic material, a binder and a dispersant into a high molecular internal mixer for mixing, and setting the stirring speed at 150-;

b. and c, extruding the banburying material obtained in the step a at the temperature of 130-155 ℃ by an extruder at the speed of 1-5 m/min, drawing wires, winding to obtain a roll shape, and storing.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

in this application, can make the silk material that has excellent mechanical properties, thickness are even through choosing suitable thermoplastic material, dispersant and binder, compare the preparation method among the prior art, the method that this application adopted, easy operation, it is low to the equipment requirement, preparation cycle is short, easily deposits.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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 invention.

Example 1

A wire for fused deposition printing ceramic comprises ceramic powder, a thermoplastic material, a binder and a dispersant, wherein the volume fraction of the ceramic powder is 70%, the volume fraction of the thermoplastic material is 20%, the volume fraction of the binder is 10%, and the dispersant accounts for 0% of the mass of the ceramic powder;

the ceramic powder can be one of alumina, zirconia, silicon dioxide, magnesia, spinel, carbide and nitride, and the grain diameter of the ceramic powder is 100 nm;

thermoplastic material: polyethylene 20 vol%;

adhesive: 10 vol% of paraffin wax;

dispersing agent: not adding;

a technique for preparing a wire for fused deposition printing of ceramics, comprising the steps of:

a. adding ceramic powder, a thermoplastic material, a binder and a dispersant into a high molecular internal mixer for mixing, and setting the stirring speed to be 300r/min, the internal mixing temperature to be 160 ℃ and the internal mixing time to be 60min, wherein the adding sequence is thermoplastic material-ceramic powder-binder-dispersant;

b. and c, extruding the banburying material obtained in the step a at 155 ℃ by using an extruder at the speed of 1 m/min, drawing and winding to obtain a roll shape, and storing.

Example 2

A wire for fused deposition printing ceramic comprises ceramic powder, a thermoplastic material, a binder and a dispersant, wherein the volume fraction of the ceramic powder is 10%, the volume fraction of the thermoplastic material is 85%, the volume fraction of the binder is 5%, and the dispersant accounts for 1% of the mass of the ceramic powder;

the ceramic powder can be one of alumina, zirconia, silicon dioxide, magnesia, spinel, carbide and nitride, and the grain diameter of the ceramic powder is 500 nm;

thermoplastic material: 85 vol% of polypropylene;

adhesive: 5 vol% of polyethylene glycol;

dispersing agent: 1 wt% of polyvinyl alcohol;

a technique for preparing a wire for fused deposition printing of ceramics, comprising the steps of: the method comprises the following steps:

a. adding ceramic powder, a thermoplastic material, a binder and a dispersant into a high molecular internal mixer for mixing, and setting the stirring speed to be 150r/min, the internal mixing temperature to be 130 ℃ and the internal mixing time to be 30min, wherein the adding sequence is thermoplastic material-ceramic powder-binder-dispersant;

b. and c, extruding the banburying material obtained in the step a at 135 ℃ by an extruder at a speed of 5 m/min, drawing and winding to obtain a roll shape, and storing.

Example 3

A wire for fused deposition printing ceramic comprises ceramic powder, a thermoplastic material, a binder and a dispersant, wherein the volume fraction of the ceramic powder is 40%, the volume fraction of the thermoplastic material is 52%, the volume fraction of the binder is 8%, and the dispersant accounts for 3% of the mass of the ceramic powder;

the ceramic powder can be one of alumina, zirconia, silicon dioxide, magnesia, spinel, carbide and nitride, and the grain diameter of the ceramic powder is 1 μm;

thermoplastic material: polystyrene 52 vol%;

adhesive: 8 vol% of polyethylene glycol;

dispersing agent: 3 wt% of sodium dodecyl benzene sulfonate;

a technique for preparing a wire for fused deposition printing of ceramics, comprising the steps of: the method comprises the following steps:

a. adding ceramic powder, a thermoplastic material, a binder and a dispersant into a high molecular internal mixer for mixing, and setting the stirring speed to be 250r/min, the internal mixing temperature to be 145 ℃ and the internal mixing time to be 45min, wherein the adding sequence is thermoplastic material-ceramic powder-binder-dispersant;

b. and c, extruding the banburying material obtained in the step a at 140 ℃ by using an extruder at the speed of 3 m/min, drawing and winding to obtain a roll shape, and storing.

Example 4

A wire for fused deposition printing ceramic comprises ceramic powder, a thermoplastic material, a binder and a dispersant, wherein the volume fraction of the ceramic powder is 60%, the volume fraction of the thermoplastic material is 34%, the volume fraction of the binder is 6%, and the dispersant accounts for 1.5% of the mass of the ceramic powder;

the ceramic powder can be one of alumina, zirconia, silicon dioxide, magnesia, spinel, carbide and nitride, and the grain diameter of the ceramic powder is 500 nm;

thermoplastic material: 34 vol% of polyethylene;

adhesive: 6 vol% of paraffin wax;

dispersing agent: polyvinyl butyral 1.5 wt%;

a technique for preparing a wire for fused deposition printing of ceramics, comprising the steps of: the method comprises the following steps:

a. adding ceramic powder, a thermoplastic material, a binder and a dispersant into a high molecular internal mixer for mixing, and setting the stirring speed to be 200r/min, the internal mixing temperature to be 145 ℃ and the internal mixing time to be 60min, wherein the adding sequence is thermoplastic material-ceramic powder-binder-dispersant;

b. and c, extruding the banburying material obtained in the step a at 145 ℃ by using an extruder at the speed of 2 m/min, drawing and winding to obtain a roll shape, and storing.

The performance parameters for the wires prepared based on examples 1-4 are:

the previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.