TW201622958A - Method for surface finishing to product made by additive manufacturing and such product with smooth surface - Google Patents

Abstract

A method for surface finishing to a product made by additive manufacturing includes coating a surface of a product made by additive manufacturing with a mixed solution containing resin in the range of 1 to 60 percent by volume and a first organic solution in the range of 40 to 99 percent by volume; providing surface uniformity treatment in which the product undergone the coating step is placed in a steam environment filled with the vaporized first organic solution and the surface of the product is catalyzed to transform into a smooth surface; and providing drying treatment for drying the product undergone the surface uniformity treatment. The surface finishing method effectively reduces the surface roughness of the product made by the additive manufacturing and maximizes utilization thereof. The present invention also provides the product treated by the aforementioned surface finishing.

Description

Surface treatment method for products manufactured by lamination and laminated products with smooth surfaces

The present invention relates to a surface treatment method for a product manufactured by lamination, in particular, a surface treatment of a product manufactured by lamination, and a laminate manufacturing product having a smooth surface.

With the evolution of technology, most of the products currently on the market are no longer just the traditional material reduction process (including cutting or drilling), but evolved to use Additive Manufacturing (AM), a kind of rapid prototyping technology. It is a digital model file based on the technology of directly manufacturing almost any shape of 3D solids, generally referred to as 3D printing or laminate manufacturing. 3D printing uses a bondable material such as powdered metal or plastic to construct an object by stacking it in layers.

At present, most of the laminate manufacturing must first establish a model through computer-aided design (CAD) or computer animation modeling software, and then "divide" the built 3D model into a layer-by-layer section to guide the printer layer by layer. Print.

Please refer to the fifth figure. At present, most of the products produced by laminated manufacturing (A) are mostly rough (poor resolution), especially the curved surface, which is generally serrated on the image, although for most The application is enough. However, if the product with high artistic value often cannot have such a rough surface, according to the previous method, the surface will be polished, but the time and money cost will increase, and it is not necessary to obtain a surface with appropriate smoothness. .

In order to solve the problem that most of the products produced by the above-mentioned laminated manufacturing are rough on the surface, the inventors of the present invention have been working on a surface treatment method for a product manufactured by lamination, comprising the following steps: a coating step: coating a mixed solution on a laminate The surface of a manufactured article comprising a first organic solution having a volume percentage of 1 to 60 of a resin and a volume percentage of 40 to 99. Uniform treatment: The article after the coating step is placed in a vapor environment after vaporization of the first organic solution, thereby catalyzing the smooth formation of the surface of the article. Drying treatment: The product after the uniform treatment step is subjected to a drying treatment.

Wherein the article is placed in a vapor environment after vaporization of the first organic solution for a period of time in a uniform process, the time being inversely proportional to the concentration of the vapor.

Preferably, the resin has a volume percentage of from 12 to 18, and the first organic solution preferably has a volume percentage of from 82 to 88.

Still alternatively, the first organic solution comprises any one of the following: acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, amyl acetate, toluene, xylene, tetrahydrofuran, dichloroethane, chloroform, dichloromethane Or trichloroethane.

Further, a gel step is further included, in which the product manufactured by the laminate is reacted with a second organic solution to produce a gel reaction before the coating step. Wherein the second organic solution comprises any one of the following: hot benzene, tetrahydrofuran, dichloromethane or dioxane.

More particularly, the second organic solution produces the gel reaction on the surface of the article manufactured by any of the following: smearing, spraying, dipping, vaporizing or depositing.

And, the mixed solution is coated on the surface of the product manufactured by the laminate in any of the following manners: painting, spraying, dipping, steaming or depositing.

The present invention is also a laminate manufacturing article having a smooth surface, which is manufactured by the above surface treatment method.

The surface treatment method for the product manufactured by the laminate and the laminate manufacturing product having the smooth surface of the invention have the following effects:

1. Generally, the surface of the product manufactured by lamination is rough, and the initial surface treatment is usually performed by mechanical grinding. However, the surface of the product can still be seen through the surface treatment by the naked eye. The surface of the product is not only smooth, but also simple to manufacture and can be processed without complicated steps.

2. Further, it is possible to change the color of the product by different colors in the mixed solution.

In combination with the above technical features, the main effects of the surface treatment method of the article for laminated production and the laminate manufacturing article having a smooth surface of the present invention will be clearly shown in the following examples.

First, a first embodiment of a surface treatment method for a product manufactured by lamination is first described with reference to the first figure. The figure shows a flow chart of the steps of the method, and is accompanied by a second The flow chart of the diagram illustrates the following:

In the first embodiment, the laminated manufacturing system is carried out by a Fused Filament Fabrication (FFF) method, and the manufactured article is described by using the most common polylactic acid (PLA) as a material.

Coating step (S11): first obtaining a product manufactured by lamination, as described in the previous paragraph, the product is a polylactic acid (PLA), and then coated with a mixed solution on the surface of the product to be smoothed, wherein The mixed solution contains one resin in a volume percentage of 1 to 60 and a first organic solution in a volume percentage of 40 to 99. The mixing is formulated with different total volume amounts depending on the area of the article. Further, the resin preferably has a volume percentage of 12 to 18, and the first organic solution preferably has a volume percentage of 82 to 88. . However, the optimum volume percentage of the resin to the first organic solution is: a volume percentage of 85 of the resin and 15% by volume of the first organic solution. It should be particularly noted that the first organic solution comprises any one of the following: acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, amyl acetate, toluene, xylene, tetrahydrofuran, dichloroethane, chloroform, Either dichloromethane or trichloroethane. In the first embodiment, acetone is used as the description of the first organic solution, but it cannot be made as any limitation.

And the mixed solution is applied to the surface of the article manufactured by lamination in any of the following ways: smearing, spraying, dipping, vaporizing or depositing. Since smearing, spraying, immersion, vapor or deposition are common knowledge in the field, the contents thereof will not be described again.

By the coating step (S11) described above, the surface of the polylactic acid can be affected by the organic solution, and the uneven surface can be slightly dissolved to be combined with the resin, thereby improving the smoothness of the surface.

Uniform treatment (S21): The polylactic acid after the coating step (S11) is placed in the vapor volatilized in the same manner as the first organic solution for a specific period of time. As described above, the polylactic acid is placed in an acetone vapor, and the length of the specific time is determined according to the concentration of the acetone vapor, that is, the specific time is inversely proportional to the concentration of the vapor.

By the above uniform treatment (S21), the resin adhered to the surface of the polylactic acid can be more tightly bonded to avoid easy peeling.

Drying treatment (S31): The polylactic acid subjected to uniform treatment (S21) is naturally dried.

The above surface treatment method can solve the problem that the surface of the product which is generally manufactured by lamination is relatively rough, and the surface of the product manufactured by the above surface treatment method is not only smooth, but also can be processed without complicated steps. Completed, quite convenient.

Referring to the third and fourth figures, the third figure shows a second embodiment of the surface treatment method of the article for laminated manufacturing of the present invention, in particular, the flow chart of the steps of the second embodiment, and The difference between the second embodiment and the first embodiment is that the gel step (S12) is further included before the covering step (S22), which is briefly described below:

Gel step (S12): firstly, the polylactic acid produced by lamination is reacted with a second organic solution to produce a gel reaction, wherein the second organic solution comprises the following doctors: hot benzene, tetrahydrofuran, two Methyl chloride or dioxane. It is specifically noted that the second organic solution is subjected to the gel reaction by coating the surface of the article produced by the laminate in any of the following ways: painting, spraying, dipping, vaporizing or depositing.

By the gel step (S12) described above, a thin outer shell can be formed on the surface of the polylactic acid first, so that the previously rough surface is first smoothed, thereby providing a subsequent coating step (S22). A smoother surface of the polylactic acid. The polylactic acid having a smooth surface is completed by the uniform treatment (S32) and the drying step (S42).

The present invention is also a laminated product having a smooth surface, which is manufactured by the above surface treatment method. However, the manufacturing process and the finished product are the same as those described above, and therefore will not be described again.

However, the above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, that is, simple equivalent changes and modifications according to the scope of the present invention and the description of the invention are It is within the scope of the invention.

(S11) ‧ ‧ the coating step of the first embodiment

(S21) ‧‧ ‧ uniform processing of the first embodiment

(S31) ‧‧‧Drying treatment of the first embodiment

(S12) ‧‧‧ gel step of the second embodiment

(S22) ‧‧ The coating step of the second embodiment

(S32) ‧ ‧ uniform processing of the second embodiment

(S42) ‧‧‧Drying treatment of the second embodiment

(A) ‧‧‧Products manufactured by laminates of prior art

[First Diagram] A flow chart of the steps of the first embodiment of the surface treatment method of the article for laminated manufacturing of the present invention.

[Second Drawing] A flow chart of the first embodiment of the surface treatment method of the article for laminated manufacturing of the present invention.

[Third Diagram] A flow chart of the steps of the second embodiment of the surface treatment method of the article for laminated manufacturing of the present invention.

[Fourth Diagram] A flow chart of the second embodiment of the surface treatment method of the article for laminated manufacturing of the present invention.

[Fifth Figure] A product manufactured by a laminate of the prior art.

(S11) ‧ ‧ the coating step of the first embodiment

(S21) ‧‧ ‧ uniform processing of the first embodiment

(S31) ‧‧‧Drying treatment of the first embodiment

Claims (9)

A surface treatment method for a product manufactured by lamination, comprising the steps of: coating step: coating a mixed solution on a surface of a product manufactured by lamination, the mixed solution containing a resin and a volume of 1 to 60 by volume a first organic solution having a percentage of 40 to 99; uniform treatment: placing the article after the coating step in a vapor environment vaporized by the first organic solution, thereby catalyzing the smooth formation of the surface of the product; drying treatment: passing The article after the uniform treatment step is subjected to a drying treatment. The surface treatment method for a product manufactured by lamination according to claim 1, wherein the product is placed in a vapor environment vaporized by the first organic solution for a period of time, the time and the vapor The concentration is inversely proportional. The surface treatment method for a product manufactured by lamination according to claim 1, wherein the resin preferably has a volume percentage of 12 to 18, and the first organic solution preferably has a volume percentage of 82 to 88. The surface treatment method for a product manufactured by lamination according to claim 1, wherein the first organic solution comprises any one of the following: acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, amyl acetate , toluene, xylene, tetrahydrofuran, dichloroethane, chloroform, dichloromethane or trichloroethane. The surface treatment method for a product manufactured by lamination according to claim 1, further comprising a gel step of applying the layered product to a second organic solution before the coating step A gel reaction is produced. The surface treatment method for a product manufactured by lamination according to claim 5, wherein the second organic solution comprises any one of the following: hot benzene, tetrahydrofuran, dichloromethane or dioxane. The surface treatment method for a laminate manufacturing polylactic acid product according to claim 4, wherein the second organic solution generates the gel reaction with the surface of the product manufactured by the laminate in any of the following manners: smearing, Spray, immerse, vapor or deposit. The surface treatment method for a laminate manufacturing polylactic acid product according to claim 1, wherein the mixed solution is coated on the surface of the product manufactured by lamination in any of the following manners: smearing, spraying, dipping, steam or Deposition. A laminate manufacturing article having a smooth surface, which is manufactured by a surface treatment method for a laminated polylactic acid product according to any one of claims 1 to 7.