CN104228067A - Solution-curing quick-molding manufacturing method - Google Patents

Abstract

The invention discloses a solution solidification rapid prototyping manufacturing method, which comprises the steps of: preparing solution raw materials; using a computer to program cutting and layering the product to be formed; controlling the start and stop of the pump, the flow rate of the pump and the movement track of the printing nozzle through the computer , so that the solution raw material undergoes chemical or/and physical changes in the process of contacting the coagulation bath to solidify and form; after printing a solid layer, control the liftable workbench to descend to a height equal to the thickness of the virtual layer; repeat the above until the printed All physical layers corresponding to each virtual layer. The solution raw material of the present invention is used as a raw material for rapid additive manufacturing, which expands the range of raw materials for rapid additive manufacturing and enriches the production mode of rapid additive manufacturing technology; at the same time, the solution solidification rapid prototyping manufacturing method does not require high Heating equipment such as energy laser has low energy consumption in the production process, the equipment form is relatively simple, the production process is easy to control, and it is easy to apply on a large scale.

Description

A solution curing rapid prototyping manufacturing method

technical field

The invention relates to a rapid additive manufacturing method, in particular to a solution solidification rapid prototyping manufacturing method.

Background technique

Rapid additive manufacturing technology (also known as 3D printing technology) is a technology that has received widespread attention in recent years. It uses 3D CAD data to accumulate layers of materials into solid prototypes by various means. The main methods are fused deposition technology (FDM), selective laser melting (SLM) or selective laser sintering (SLS), gypsum 3DP printing technology, etc. The raw materials for printing are generally filamentous, powdery metal or non-metallic , light-cured liquid resin, etc.

Stereolithography (SL) technology is based on the polymerization reaction of photosensitive resin, and the ultraviolet laser under computer control scans the liquid resin point by point along the outline of each layered section of the component, so that the scanned resin The thin layer polymerizes, gradually forming lines from dots, and finally forming a cured cross-section of a thin layer of the part, while the unscanned resin remains in its original liquid state. When one layer is cured, the lifting table moves a distance of one layer thickness, and a new layer of liquid resin is covered on the surface of the previous layer of cured resin for scanning and curing again. The newly cured layer is firmly bonded to the previous layer, and the cycle repeats until the entire part is prototyped. The advantages of the SL process are high precision, the general dimensional accuracy can be controlled at 0.01mm, the surface quality is good, the utilization rate of raw materials is close to 100%, and it can manufacture parts with particularly complex and fine shapes.

Fused deposition technology (FDM) technology is to extrude filamentous materials such as thermoplastics, wax or metal fuses from heating nozzles, and perform melt deposition at a fixed rate according to the predetermined trajectory of each layer of the part, superimposing a Layer, the workbench descends a layer thickness to superimpose and deposit a new layer, and so on to finally realize the deposition and molding of the part.

Since the materials used in the existing rapid additive manufacturing technology are generally filamentous, powdery metal or non-metal, light-cured liquid resin, etc., these materials generally require laser or other equipment to be heated during the curing molding process. Therefore, the existing additive manufacturing technology has disadvantages such as large energy consumption, complex equipment structure, and high difficulty in control; at the same time, there is no rapid additive manufacturing technology using solution as raw material in the existing technology, and the additive manufacturing technology method is not enough. comprehensive.

Contents of the invention

In view of this, the purpose of the present invention is to provide a solution solidification rapid prototyping manufacturing method to further enrich the way of rapid additive manufacturing technology.

The solution curing rapid prototyping manufacturing method of the present invention comprises steps:

(1) Prepare the solution raw material as the printing raw material, and put the solution raw material into a storage container that maintains its stability and uniformity;

(2) Use a computer to perform program cutting and layering on the product to be formed to form each virtual layer that composes the product;

(3) Use a pump to spray the solution raw material in the storage container into the coagulation bath through the printing nozzle. The coagulation bath is provided with a liftable workbench for carrying the product, and the computer controls the start and stop of the pump, the flow rate of the pump and the printing nozzle. The movement trajectory of the raw material of the solution causes chemical or/and physical changes to occur in the contact process with the coagulation bath to solidify and form, and the solidified molding material accumulates at the interface of the coagulation bath to form a layer of entities consistent with the shape of the virtual layer in step (2). layer;

(4) Control the liftable workbench to descend to a height equal to the thickness of the virtual layer after printing a solid layer;

(5) Step (3) and step (4) are repeated in sequence until all physical layers corresponding to the virtual layers in step (2) are printed out.

Further, in step (3), the raw material of the solution undergoes reverse phase precipitation during contact with the coagulation bath to solidify and form.

Further, the raw material of the solution is a homogeneous mixed system formed by dispersing polymers in a solvent in a molecular state.

Further, the polymer includes at least one of polyimide, polyetheretherketone, polyethersulfone, polyacrylonitrile, polystyrene, ABS, polyethylene, polypropylene, polylactic acid and polyacrylamide; The solvent includes at least one of sulfolane, DMAc, DMSO, DMF and NMP; the coagulation bath includes at least one of water, sulfolane, DMAc, DMF and NMP.

Further, in step (3), the raw material of the solution reacts chemically during contact with the coagulation bath and is solidified and formed. The raw material of the solution includes epoxy resin emulsion, cement mortar or anaerobic adhesive, and the coagulation bath includes Water, steam, air or nitrogen.

Further, in step (3), the raw material of the solution undergoes a crystallization reaction during contact with the coagulation bath to solidify and form.

Further, the solution raw material includes lignocellulose emulsion or chitosan solution, and the coagulation bath is water.

Further, in step (1), the stability and uniformity of the solution raw materials in the storage container are maintained by means of heating and stirring.

Further, in step (3), heating or cooling is used to maintain the temperature required for the solution raw materials to solidify and form.

Beneficial effects of the present invention: the present invention is a solution solidification rapid prototyping manufacturing method, which uses solution raw materials as raw materials for rapid additive manufacturing, expands the range of raw materials for rapid additive manufacturing, and enriches the production methods of rapid additive manufacturing technology; At the same time, the solution solidification rapid prototyping manufacturing method does not need heating equipment such as high-energy lasers in the manufacturing process, the energy consumption of the production process is low, the equipment form is relatively simple, the production process is easy to control, and it is easy to apply on a large scale.

Description of drawings

Fig. 1 is a schematic diagram of the equipment structure for implementing the solution curing rapid prototyping manufacturing method of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiment 1, as shown in the figure, the solution curing rapid prototyping manufacturing method of this embodiment includes steps:

(1) Prepare the solution raw material as the printing raw material, and put the solution raw material into the storage container 1 to maintain its stability and uniformity;

(2) Utilize computer 2 to carry out program cutting and layering to the product to be formed, form each virtual layer that forms product, utilize program cutting and layering product to belong to prior art, can utilize existing cad design software to finish;

(3) Adopt the pump 3 to spray the solution raw material in the storage container 1 into the coagulation bath 5 through the print nozzle 4, the coagulation bath 5 is provided with a liftable workbench 7 carrying the product 6, and the pump 3 is controlled by the computer 2 The starting and stopping, the flow rate of the pump and the movement trajectory of the printing nozzle make the raw material of the solution undergo chemical or/and physical changes during the contact process with the coagulation bath 5 and solidify and form, and the solidified molding material accumulates at the interface of the coagulation bath 5 to form a layer and The physical layer with the same virtual layer shape in step (2);

(4) Control the liftable workbench 7 to descend to a height equal to the thickness of the virtual layer after printing one layer of the physical layer;

(5) Step (3) and step (4) are repeated successively until printing out all physical layers corresponding to each virtual layer of step (2);

(6) The printed product is taken out from the coagulation bath 5, and then processed in the later stage to obtain the final qualified product.

In the solution solidification rapid prototyping manufacturing method of this embodiment, in step (3), the solution raw material undergoes reverse phase precipitation and solidification molding during contact with the coagulation bath 5, and the solution raw material is a polymer dispersed in a solvent in a molecular state A homogeneous mixed system formed in

In this embodiment, the solution raw material is a homogeneous mixed system formed by dissolving polyimide in DMAc solvent, and the coagulation bath 5 is water, sulfolane, DMF or NMP, etc. Of course, in different embodiments, the solution raw material can also be a homogeneous mixed system formed by dissolving polyethersulfone in a sulfone solvent, and the coagulation bath is water, DMAc, DMF or NMP, etc.; the solution raw material can also be A homogeneous mixed system formed by dissolving polyether ether ketone in diphenyl sulfone, the coagulation bath is water, DMAc, DMF or NMP; the raw material of the solution can also be a homogeneous mixed system formed by dissolving polyacrylonitrile in DMF , the coagulation bath is water, sulfolane, DMAc or NMP; the solution raw materials and the coagulation bath 5 that partly can take place in the reverse precipitation reaction are only enumerated in the present embodiment, and those skilled in the art should understand that other solution raw materials and coagulation baths have been used. bath, but the solution-curing rapid prototyping manufacturing method substantially the same as this solution-curing rapid prototyping manufacturing method should also be included in the protection scope of the present invention.

In the solution solidification rapid prototyping manufacturing method of this embodiment, in step (1), heating and stirring are used to maintain the stability and uniformity of the solution raw materials in the storage container 1 .

In the solution solidification rapid prototyping manufacturing method of this embodiment, in step (3), heating or cooling is also used to maintain the temperature required for the solidification and molding of the solution raw materials.

Embodiment 2: The difference between the solution solidification rapid prototyping manufacturing method of this embodiment and Embodiment 1 is that: in step (3), the solution raw material undergoes a chemical reaction during contact with the coagulation bath to solidify and form, and the solution raw material It is an epoxy resin emulsion, and the coagulation bath is water, water vapor, air or nitrogen; certainly in different embodiments, the raw material of the solution can also be cement mortar, and the coagulation bath is water, water vapor, air or nitrogen. Nitrogen: The solution raw material can also be anaerobic glue, and the coagulation bath includes water, water vapor, air or nitrogen. Other steps of the solution curing rapid prototyping manufacturing method in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Embodiment three: the difference between the solution solidification rapid prototyping manufacturing method of this embodiment and embodiment one is that: in step (3), the solution raw material undergoes a crystallization reaction during contact with the coagulation bath to solidify and form, and the solution raw material Including lignocellulose emulsion, the coagulation bath is water; of course, in different embodiments, the solution raw material can also be chitosan solution, and the coagulation bath is water. Other steps of the solution curing rapid prototyping manufacturing method in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements, but other technical solutions that do not deviate from the spirit and scope of the technical solutions of the present invention, shall be covered by the claims of the present invention.

Claims (9)

1. a solution cured quick forming fabri-cation method, is characterized in that: comprise step:

(1) preparation is as printing raw-material solution materials, and is loaded by solution materials in the storage container keeping its stability and uniformity;

(2) utilize computer to carry out program cutting layering to the product that will be formed, form each virtual level of composition product;

(3) pump is adopted to spray in coagulating bath by the solution materials in storage container through printing head, the lifting workbench of bearing product is provided with in described coagulating bath, by the movement locus of the start and stop of computer control pump, the flow of pump and printing head, make solution materials with coagulating bath contact process in there is chemistry or/and physical change and curing molding, curing molding material is piled up in the interface of coagulating bath and is formed one deck physical layer consistent with the middle virtual level shape of step (2);

(4) after having printed one deck physical layer, control the height that lifting workbench decline is equal with virtual level thickness;

(5) step (3) and step (4) is repeated successively, until print all physical layers corresponding with step (2) each virtual level.

2. the solution cured quick forming fabri-cation method of one according to claim 1, is characterized in that: in step (3), described solution materials with coagulating bath contact process in there is anti-phase precipitation and curing molding.

3. the solution cured quick forming fabri-cation method of one according to claim 2, is characterized in that: described solution materials is that polymer disperses homogeneous mixture system formed in a solvent with molecular state.

4. the solution cured quick forming fabri-cation method of one according to claim 3, is characterized in that: described polymer comprises at least one in polyimides, polyether-ether-ketone, polyether sulfone, polyacrylonitrile, polystyrene, ABS, polyethylene, polypropylene, PLA and polyacrylamide; Described solvent comprises at least one in sulfolane, DMAc, DMSO, DMF and NMP; Described coagulating bath comprises at least one in water, sulfolane, DMAc, DMF and NMP.

5. the solution cured quick forming fabri-cation method of one according to claim 1, it is characterized in that: in step (3), described solution materials with coagulating bath contact process in there is chemical reaction and curing molding, described solution materials comprises epoxy resin emulsion, cement mortar or anaerobic adhesive, and described coagulating bath comprises water, steam, air or nitrogen.

6. the solution cured quick forming fabri-cation method of one according to claim 1, is characterized in that: in step (3), described solution materials with coagulating bath contact process in there is crystallization reaction and curing molding.

7. the solution cured quick forming fabri-cation method of one according to claim 6, is characterized in that: described solution materials comprises lignocellulosic emulsion or chitosan solution, and described coagulating bath is water.

8. according to the described solution cured quick forming fabri-cation method of one arbitrary in claim 1-7, it is characterized in that: in step (1), the stability adopting heating and agitating mode to keep solution materials in storage container and uniformity.

9. the solution cured quick forming fabri-cation method of one according to claim 8, is characterized in that: in step (3), adopts heating or the type of cooling to keep the temperature needed for solution materials curing molding.