KR20220080845A - Manufacturing of pvb full mold using 3d printing technique - Google Patents

Abstract

The method for manufacturing a PVB loss model mold using 3D printing of the present invention comprises: (A) 3D printing using a thermoplastic polymer; (B) placing the 3D printed output in the fumigator; (C) fumigating the 3D printing output in a fumigator; and (D) manufacturing a mold using the fumigated 3D printing output.
The thermoplastic polymer may be a polyvinyl butyral (PVB) polymer, and the 3D printing may be FDM printing.
In addition, the 3D printed output may be immersed in silicone oil and then fumigated with ethanol.

Description

PVB loss model mold manufacturing method using 3D printing {MANUFACTURING OF PVB FULL MOLD USING 3D PRINTING TECHNIQUE}

The present invention relates to a method for manufacturing a mold, and more particularly, to a method for manufacturing a PVB loss model mold using 3D printing.

There are various methods for making a product of a desired shape.

Among them, there is a sand casting method in which a space having a specific shape (ie, a mold space) is formed using sand (commonly referred to as casting sand), and molten metal is injected thereto to solidify.

In the sand casting method, the space of this specific shape was formed using the casting model which forms the space which has a specific shape.

In general, the casting model was manufactured using easy-to-form Styrofoam.

However, since the casting model made of Styrofoam is lost once, it is difficult to recycle, and there is a concern that Styrofoam itself may cause a big environmental problem.

In addition, model production using Styrofoam is not desirable from an economic point of view because the process itself is very complicated and requires a skilled worker as well as a lot of manual work.

Recently, there has been an attempt to make a model using a 3D printer.

A 3D printer is an additive manufacturing (AM) device that builds a desired shape by layer-by-layer deposition of materials.

Originally, 3D printing technology originated from rapid prototyping (RP), but recently its application field has been expanded to produce products for various purposes beyond prototypes, and one of them is conventional Styrofoam using a 3D printer. It is to replace the casting model using

Among 3D printing technologies, a fused deposition modeling (FDM) 3D printer is a printer that is popular and widely used, and is a device that produces a three-dimensional shape by hot melt extrusion of a thermoplastic polymer.

By the way, the FDM 3D printing structure (or FDM 3D printing output) made by melting the material and stacking it layer by layer as shown in FIG. There is a structural disadvantage in that the surface roughness appears large due to surface irregularity.

Therefore, post-processing is required to reduce the surface roughness of the structure manufactured by 3D printing.

For example, as a general post-processing technique, there is a method of removing surface irregularities by mechanical friction (ie, cutting), but this has the disadvantage that it takes a lot of effort and time.

In order to solve the disadvantages of the method of removing surface irregularities due to mechanical friction, as a representative method that can effectively remove irregularities formed on the surface of 3D printing polymer structures, fumigation is used to remove irregularities on the surface of structures manufactured by 3D printing. can be removed.

The fumigation technique will be briefly described with reference to FIGS. 3 and 4 .

3 is a view showing a schematic surface asperity removal behavior by fumigation in a typical 3D printing output, and FIG. 4 is a view showing a reaction aspect between a 3D printing output and a solvent molecule in a surface unevenness removal process by fumigation. .

First, the 3D-printed structure is placed in a chamber with a solvent capable of dissolving the polymer.

To vaporize this solvent, the chamber is bathed above the boiling point of the solvent.

When the temperature inside the chamber reaches the boiling point of the solvent, a gas phase of the solvent starts to be generated inside the chamber, and after a certain amount of time has elapsed, it has a certain amount of vapor pressure.

At this time, the distillation apparatus is separately installed to maintain the internal vapor pressure and at the same time minimize the loss of the solvent.

As time goes by, the vapor formed inside the chamber is liquefied at the same time as it comes into contact with the polymer structure (3D printed output), and reacts with the polymer in the polymer structure.

Solvent molecules reacted with the polymer penetrate between the polymer chains, and as a result, the distance between the polymer chains increases (see FIG. 4 ).

At this time, the polymer is gelled, the viscosity is lowered, and it is affected by gravity to sink, and as a result, the unevenness disappears.

Referring to FIG. 3 , from the left to the right of the drawing, it can be seen that the unevenness of the surface gradually disappears as time passes.

On the other hand, the amount of gelation of the polymer is proportional to the vapor pressure of the solvent gas in the chamber and the time it is exposed to the gas.

That is, it is known that the temperature at which the chamber is bathed and the bathing time are the most important factors in the fumigation process.

However, the solvent used in the fumigation process is preferably selected as a liquid capable of dissolving the polymer, and generally, acetone, toluene, butanol, etc. have been used as the solvent capable of dissolving the polymer, but these solvents are It is recommended not to use it as it is harmful to

In particular, such a solvent may leak during the fumigation process and penetrate into the respiratory tract in a gaseous form.

That is, it is preferable to use a solvent that is harmless to the human body during fumigation.

On the other hand, PVB (Polyvinyl Butyral) is one of the materials that can be applied to FDM 3D printing, and although it is soluble in several solvents described above, it has a characteristic that it dissolves well in ethanol, which is relatively harmless to the human body.

Therefore, the inventors of the present invention, after much effort, fumigate the PVB 3D printing structure using ethanol instead of the existing Styrofoam to remove the surface irregularities, and finally, using a 3D printing technique using a 3D printer, a PVB loss model mold A manufacturing method was created.

Republic of Korea Patent Publication No. 10-0942176 (published on Feb. 11, 2010)

Accordingly, an object of the present invention is to reduce the time required for a model manufacturing process by using a 3D printing technique without using a styrofoam model.

In addition, another object of the present invention is to economically manufacture the model by reducing the manpower input to the process.

In addition, another object of the present invention is to reduce environmental problems by not using a one-time casting model such as Styrofoam.

In addition, it is another object of the present invention to produce a more precise model compared to styrofoam processing.

In addition, another object of the present invention is to secure economic feasibility by minimizing wear of various cutting tools used in mold processing.

The problem to be solved by the present invention is not limited to the problem(s) mentioned above, and another problem(s) not mentioned above is also a person having ordinary knowledge in the technical field to which the present invention belongs from the following description (" Those of ordinary skill in the art") will clearly understand.

In order to solve the above problems, according to a preferred embodiment of the present invention, the PVB loss model mold manufacturing method using 3D printing of the present invention, (A) 3D printing step using a thermoplastic polymer; (B) placing the 3D printed output in the fumigator; (C) fumigating the 3D printed output in a fumigator; and (D) manufacturing a mold using the fumigated 3D printing output.

In a preferred embodiment of the present invention, the thermoplastic polymer in step (a) is preferably a PVB polymer.

In a preferred embodiment of the present invention, the 3D printing in step (a) is preferably FDM printing.

In a preferred embodiment of the present invention, the 3D printing output in step (c) may be hot water.

In a preferred embodiment of the present invention, the bath may be achieved by silicone oil.

In a preferred embodiment of the present invention, the temperature of the silicone oil is preferably maintained at 80 ℃.

In a preferred embodiment of the present invention, the fumigation in step (c) may be performed using ethanol.

In a preferred embodiment of the present invention, the fumigation may be performed for 1 minute to 50 minutes.

In a preferred embodiment of the present invention, the step of heat-treating the 3D printed output after the fumigation may be further performed.

In a preferred embodiment of the present invention, the heat treatment may be performed at 80 °C.

Other specific details of preferred embodiments of the present invention are included in the following "Details for carrying out the invention" item and accompanying drawings.

Advantages and/or features of the present invention, and a method of achieving the same, will become apparent with reference to each embodiment of the "Specific details for carrying out the invention" item described below with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments described below, but can be implemented in various different forms, and each embodiment of the present invention only makes the disclosure of the present invention complete, and provides those of ordinary skill in the art It is to be understood that the present invention is only defined by the scope of each of the claims, which is provided only as a complete indication of the scope and scope.

According to a preferred embodiment of the present invention, since the Styrofoam model is not used, environmental problems can be minimized.

According to a preferred embodiment of the present invention, the time required for model production can be reduced through the 3D printing technique.

According to a preferred embodiment of the present invention, it is possible to lower the manufacturing cost of the model.

According to a preferred embodiment of the present invention, it is possible to manufacture a high-quality model.

It should be understood that the effects of the present invention are not limited only to the above effects, and include all other effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a flowchart showing schematic process steps of a method for manufacturing a PVB loss model mold using 3D printing according to a preferred embodiment of the present invention.
2 is a view showing the surface roughness state of the FDM 3D printing output.
3 is a view showing a schematic surface asperity removal behavior by fumigation in a typical 3D printing output.
4 is a view showing the reaction aspect of the 3D printing output and solvent molecules in the surface asperity removal process by fumigation.
5 is a view showing an example of a fumigator for fumigating a 3D printed output according to a preferred embodiment of the present invention.
6 (a) to 6 (f) are surface photographs observed under a microscope according to a fumigation time of a fumigated 3D printed output specimen according to a preferred embodiment of the present invention, respectively, in Fig. 6 (a) ) is the case of no fumigation, Figure 6 (b) is for 1 minute, Figure 6 (c) is for 5 minutes, Figure 6 (d) is for 10 minutes, Figure 6 (e) is for 30 minutes, and Fig. 6(f) is a view showing the case of fumigation treatment for 50 minutes.
7 is a graph showing the tensile test results before and after fumigation of the 3D printed output without fumigation and the 3D printed output obtained according to a preferred embodiment of the present invention for each time period.
8 is a graph showing the tensile test results measured by heat treatment for each time period for the 3D printing output obtained according to a preferred embodiment of the present invention.
9 is a graph showing measurement results of a differential scanning calorimeter for a 3D printed output obtained according to a preferred embodiment of the present invention.
Figure 10 (a) is a graph showing the tensile strength according to the process time (Process time) for the 3D printing output obtained according to a preferred embodiment of the present invention.
Figure 10 (b) is a graph showing the elongation according to the process time (Process time) for the 3D printing output obtained according to a preferred embodiment of the present invention.

Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention in detail, the terms or words used in this specification should not be construed as being unconditionally limited to their ordinary or dictionary meanings, and the inventor of the present invention must explain his invention in the best way. For this purpose, it should be understood that the concepts of various terms can be appropriately defined and used, and furthermore, these terms or words should be interpreted as meanings and concepts consistent with the technical idea of the present invention.

That is, the terms used herein are only used to describe preferred embodiments of the present invention, and are not used for the purpose of specifically limiting the content of the present invention, and these terms represent various possibilities of the present invention. It should be noted that the term has been defined with consideration in mind.

In addition, in the present specification, the expression of the singular may include a plurality of expressions unless the context clearly indicates that it has only the meaning of the singular, and similarly, even if expressed in plural, the meaning of the singular may be included. you should know that there is

Moreover, throughout this specification, when it is stated that a certain element "includes" another element, unless otherwise stated, other elements are not excluded, but other elements are added. It may mean that it can include

Furthermore, when it is described that a component is "exists in or is connected to" of another component, the component is directly connected to or installed in contact with another component, or at a certain distance It may be installed spaced apart, and in the case of being installed spaced apart at a certain distance, a third component or means for fixing or connecting the corresponding component to another component may exist, in which case the third component or It should be noted that the description of the means may be omitted.

On the other hand, when it is described that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the third element or means does not exist.

Likewise, other expressions describing the relationship between each component, such as "between" or "immediately between", or "neighboring to" or "directly adjacent to", have the same meaning. should be interpreted as having

In addition, in this specification, terms such as "one side", "other side", "one side", "other side", "first", "second", etc., if used, for one component, this single component It is used to be clearly distinguished from other components, and it should be understood that the meaning of the component is not limitedly used by such terms.

In addition, in the present specification, terms related to positions such as "upper", "lower", "left", and "right", if used, should be understood as indicating a relative position in the related drawings with respect to the corresponding component, Unless an absolute position is specified with respect to their position, it should not be understood that these position-related terms refer to the absolute position of each component.

Moreover, in the specification of the present invention, terms such as “…unit”, “…group”, “module”, “device”, etc., if used, mean a structural unit capable of processing one or more functions or operations, which It should be understood that it may be implemented in hardware or software, or a combination of hardware and software.

In addition, in this specification, in specifying the reference number for each component shown in the accompanying drawings, the same component has the same reference number even if it is shown in different drawings, that is, throughout the specification. Like elements are indicated by like reference numerals.

In addition, in the accompanying drawings, the size, position, coupling relationship, etc. of each component constituting the present invention are partially exaggerated, reduced, or omitted to convey the spirit of the present invention sufficiently clearly or for convenience of explanation. There may be, and therefore the proportion or scale may not be exact.

In addition, in the present specification, when the description of a method including steps is described, an identification code (reference numeral) for indicating each step is used only for convenience of description, and these identification codes indicate the order of each step. is not definitively designated and described, and may occur differently from the order of steps described herein unless a specific order of each step is explicitly described in context.

That is, each step of the present invention may occur in the order described herein, may be performed substantially simultaneously, if necessary, rather than proceeding sequentially, may be performed in the reverse order in the opposite direction. It should be noted that the step may be performed while omitting it.

In addition, in the following, in the description of the present invention, it is determined that the gist of the present invention may be unnecessarily obscured, other configurations that can be technically inferred by those skilled in the art, and known techniques including the prior art. It should be noted that a detailed description of the configuration and the like may be omitted.

The present invention and the scope to be claimed by the present invention can be fully understood by referring to the various characteristic configurations and embodiments described in the "Specific details for carrying out the invention" item in the present specification while referring to the accompanying drawings of the present specification. .

Hereinafter, a method for manufacturing a PVB loss model mold using 3D printing according to a preferred embodiment of the present invention will be described.

1 is a flowchart showing schematic process steps of a method for manufacturing a PVB loss model mold using 3D printing according to a preferred embodiment of the present invention.

As can be seen from Figure 1, the PVB disappearance model mold manufacturing method using 3D printing according to a preferred embodiment of the present invention is a 3D printing step (S100) using a thermoplastic polymer, positioning the 3D printing output in the fumigator (S200), fumigating the 3D printing output in the fumigator (S300), and manufacturing a mold using the fumigated 3D printing output (S400) may include.

First, a 3D printing output may be printed using a thermoplastic polymer (step S100).

The thermoplastic polymer is preferably a polyvinyl butyral (PVB) polymer.

The 3D printing step (S100) using the thermoplastic polymer is a step of printing (printing) the 3D printing output in the 3D printer using the thermoplastic polymer.

However, as shown in FIG. 2 , since the 3D printed output output by the 3D printer has a considerable surface roughness, post-processing is required.

In the present invention, a fumigation technique using ethanol is used as this post-processing.

Before using the fumigation technique, in order to compare and analyze the effect of fumigation on the surface of the specimen obtained by FDM 3D printing, a thermoplastic PVB (polyvinyl butyral) polymer was selected as a printing material and a specimen for tensile measurement (specific shape) according to ASTM-D638 typeIV ^B However, for other limitations, refer to the relevant standard), and a number of specimens were fabricated by FDM 3D printing technique.

Specimen production conditions may be as shown in Table 1 below.

For fumigation, first, a 3D printing output (specimen) may be placed in a fumigator (step, S200).

And, it is possible to fumigate the 3D printing output in the fumigator (step S300).

5 is a view showing an example of a fumigator for fumigating a 3D printed output according to a preferred embodiment of the present invention.

A fumigator for surface treatment of the printed specimen is shown in FIG. 5 .

From FIG. 5, in order to stably generate ethanol vapor at a constant temperature, a container containing ethanol was bathed with high specific heat silicone oil (Saehan silichem oil) (refer to reference numeral 6 in FIG. 5).

On the other hand, the ethanol used for fumigation of the specimen was 95%, a product of DUKSAN, and fumigation was carried out while maintaining the temperature of the silicone oil at 80 °C.

In addition, a distillation head was used to suppress the loss of ethanol in the fumigation vessel 5, and at this time, the temperature of the cooling water was maintained at 18 °C.

The specimens prepared according to the conditions of Table 1 were put into the fumigator shown in FIG. 5 and fumigated for 1, 5, 10, 30, and 50 minutes, respectively.

After fumigation, each specimen was placed at room temperature and naturally dried for 5 days.

5, reference numeral 1 denotes a cooling water circulation pipe, reference numeral 2 denotes a cooling water inlet, reference numeral 3 denotes a cooling water outlet, reference numeral 4 denotes a cover, and reference numeral 5 denotes a fumigation vessel (Chamber, Ethanol vapor and air), reference numeral 6 is a silicone oil container, 7 is a thermometer for temperature measurement, and 8 is a hot plate.

Finally, it may include a step (S400) of manufacturing a mold using the fumigated 3D printing output.

This step (S400) may be a step of manufacturing a mold using the FDM 3D printing output fumigated according to the method of the present invention, not the tensile measurement specimen described in relation to Table 1.

The inventors of the present invention for the various specimens described above, before / after ethanol fumigation of the specimen, and in order to observe the change state of the specimen surface according to the fumigation time using an optical microscope (MSP-8000 pro, DIGIBIRD, Korea) using a specimen The tip of the was observed at 150 times magnification.

6 (a) to 6 (f) are surface photographs observed under a microscope according to a fumigation time of a fumigated 3D printed output specimen according to a preferred embodiment of the present invention, respectively, in FIG. 6 (a) is a case of not fumigation, Figure 6 (b) is for 1 minute, Figure 6 (c) is for 5 minutes, Figure 6 (d) is for 10 minutes, Figure 6 (e) is for 30 minutes, and Figure 6 (f) is a diagram showing the case of 50 minutes of fumigation.

According to (a) to (f) of Figure 6, except for the non-fumigation of Figure 6 (a), the surface of all the specimens fumigated even a little was shiny, especially as the fumigation time increased As the viscosity of the surface of the specimen decreases due to gelation by ethanol, it can be seen that the surface roughness decreases due to the effect of gravity, that is, the unevenness of the surface gradually disappears.

This is considered to be a phenomenon that occurs because the number of ethanol molecules penetrating between the chains inside the PVB increases as the exposure time of the PVB to the solvent vapor increases.

That is, as the number of ethanol molecules penetrating into the PVB increases, the distance between each chain increases, and the PVB gradually becomes a gel and the viscosity decreases. Line distance) is filled and the surface becomes flat.

On the other hand, it can be observed that the irregularities completely disappeared from the surface (FIG. 6(e) and FIG. 6(f)) of the specimen fumigated for more than 30 minutes, and in particular, it can be observed that air bubbles are trapped inside.

It seems that the bubbles inside the PVB were captured during the diffusion of ethanol into the atmosphere during the drying process, and the number of trapped bubbles was determined to be due to the difference in the viscosity of the PVB.

experimental example

Roughness, tensile strength, elongation, and crystallization temperature of the specimen were measured for the non-fumigated and fumigated cases of the above-described specimens.

First, a roughness meter (SJ-210, Mitutoyo, Japan) was used to observe the surface roughness of the specimen before/after fumigation and according to the fumigation time.

The roughness measurement results are shown in Table 2 below.

From Table 2, it can be seen that the surface roughness decreases significantly as the fumigation time increases.

That is, for the illuminance before and after fumigation, Ra from 10.687 μm to 0.197 μm, Rq from 14.553 μm to 0.234 μm, and Rz from 65.668 μm to 0.932 μm, all significantly decreased.

In particular, Rz shows a rapid decrease compared to Ra and Rq, which means that the exceptionally convex shape or concave shape disappears first.

On the other hand, it can be seen that the measured Rz value in the specimen fumigated for 30 minutes increased (increased from 4.001 μm to 6.477 μm at the time of fumigation for 10 minutes), and it is considered that the cause is due to the fine air bubbles formed on the surface of the specimen. .

It is considered that this can be estimated through the decrease in the Rz measurement value in the fumigated specimen for 50 minutes of fumigation (4.001 μm → 0.932 μm at 10 minutes of fumigation).

On the other hand, the tensile test results before and after fumigation and for each time period of fumigation will be described with reference to FIG. 7 .

For the tensile test, a specimen for measuring tensile strength was produced by 3D printing according to ASTM-D638 type IV ^B standard, and the stress-strain rate of the specimen before fumigation and fumigation time was 0.1 mm/ Five tensile tests were performed per specimen at a min rate, respectively, and the average value was adopted.

7 is a graph showing the tensile test results before and after fumigation of the 3D printed output obtained without fumigation and the 3D printed output obtained according to a preferred embodiment of the present invention for each time period.

7, as the fumigation time elapsed, the tensile strength (Tensile Stress) was lowered and the strain (Strain) showed a tendency to increase.

Specifically, the tensile strength before fumigation was 35.2 MPa and decreased to 28.5, 28.4, 20.1, 21.8, and 18.9 MPa as the fumigation time elapsed for 1, 5, 10, 30, and 50 minutes, respectively.

On the other hand, the strain increased to 4.57, 5.74, 8.28, 9.01, and 12.77 as fumigation time elapsed 1, 5, 10, 30, and 50 minutes, respectively, compared to 4.28 before fumigation.

As shown in FIG. 4, it is judged that this tendency is due to the decrease in the attractive force between the polymer chains, which occurs as the ethanol molecules penetrate between the polymer chains by fumigation and the distance between the polymer chains increases.

That is, it can be explained that the separated interchain distance is maintained even after drying, so that the tensile strength of the polymer decreases and the elongation increases.

In the present invention, the toughness coefficient, which is the capacity to absorb energy without breaking the material, was obtained from the stress-strain diagram for each time period before and after fumigation using the trapezoidal numerical integration method.

Toughness modulus refers to the total area under the stress-strain diagram as the energy absorbed per unit volume up to the point of failure of the specimen.

Therefore, as the fumigation time increases, the tensile strength decreases but the toughness increases. Therefore, it can be seen that when the fumigation time is increased, brittleness occurs in the specimen, resulting in ductile fracture.

Meanwhile, in order to check whether heat treatment affects the mechanical properties of PVB specimens, specimens of the same specification were heat treated at 80 ° C. for 1, 5, 10, 30, and 50 minutes, respectively, and then tensile tests were performed under the same conditions.

8 is a graph showing the tensile test results measured by heat treatment for each time period for the 3D printing output obtained according to a preferred embodiment of the present invention.

As can be seen from FIG. 8, the tensile strength before heat treatment was 35.2 MPa, and as the heat treatment time elapsed for 1, 5, 10, 30, and 50 minutes, respectively, it increased to 37.1, 37.6, 37.5, 37.5, and 39.1 MPa.

In addition, the strain decreased to 3.81, 3.61, 3.34, 3.15, and 2.98, respectively, as the heat treatment time elapsed for 1, 5, 10, 30, and 50 minutes, respectively, compared to 4.28 before fumigation.

That is, as the heat treatment time elapsed, the tensile strength increased and the strain decreased.

On the other hand, DSC (Differential Scanning Calorimetry) of the PVB specimen prepared by 3D printing was measured.

9 is a graph showing measurement results of a differential scanning calorimeter for a 3D printed output obtained according to a preferred embodiment of the present invention.

For DSC measurement, thermal analysis was performed for a temperature range of 20 to 240 ° C using a differential scanning calorimeter (DSC404 F1, NETZSCH, Germany). can

Therefore, it can be assumed that the tendency for the tensile strength of the specimen to increase and the strain to decrease according to the heat treatment is caused by the crystallization of the PVB specimen.

Finally, in order to investigate the effect of fumigation and heat treatment time on the tensile strength and elongation of the specimen, normalized tensile stress and normalized strain according to process time were measured.

Figure 10 (a) is a graph showing the tensile strength according to the process time (Process time) for a 3D printing output obtained according to a preferred embodiment of the present invention, Figure 10 (b) is a preferred embodiment of the present invention It is a graph showing the elongation according to the process time for the 3D printing output obtained according to the example.

According to (a) of Figure 10, as the process time increases, the tensile strength (Nomalized tensile stress) of the fumigation specimen is 0.81, 0.81, 0.57, 0.62, 0.54, a tendency to decrease to a large width (46%) It can be seen that the normalized tensile stress of the annealed specimen shows a tendency to increase with a relatively small width (11%) as 1.05, 1.07, 1.07, 1.07, 1.11.

On the other hand, as shown in Figure 10 (b), as the process time increases, the elongation (Normalized strain) of the fumigation specimen is 1.07, 1.34, 1.93, 2.11, 2.98, which increases to a very large width (298%). The normalized strain of the annealed specimen was reduced to 0.89, 0.84, 0.78, 0.74, and 0.70 with relatively small widths.

10 (a) and 10 (b), the effect on the mechanical properties of the specimen subjected to fumigation and the specimen subjected to heat treatment was much greater than the change in mechanical properties caused by fumigation was much greater than the change in physical properties caused by heat treatment, It can be seen that the effect of heat treatment upon fumigation is relatively insignificant.

So far, various specific embodiments of the method for manufacturing a PVB loss model mold using 3D printing according to the present invention have been described, but various implementation modifications are possible without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims as well as the claims and equivalents.

That is, it should be understood that the above-described embodiment is illustrative in all respects and not restrictive, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and their equivalents All changes or modifications derived from the concept should be construed as being included in the scope of the present invention.

S100: 3D printing step using a thermoplastic polymer
S200: Positioning the 3D printing output in the fumigator
S300: Step of fumigating the 3D printing output in the fumigator
S400: Manufacturing a mold using the fumigated 3D printing output

Claims (10)

(A) 3D printing step using a thermoplastic polymer;
(B) placing the 3D printed output in the fumigator;
(C) fumigating the 3D printing output in a fumigator; and
(D) manufacturing a mold using the fumigated 3D printing output; characterized in that it comprises,
A method of manufacturing a PVB vanishing model mold using 3D printing.
The method according to claim 1,
The thermoplastic polymer in step (a) is characterized in that the PVB (polyvinyl butyral) polymer,
A method of manufacturing a PVB vanishing model mold using 3D printing.
The method according to claim 1,
The 3D printing in step (a) is characterized in that FDM printing,
A method of manufacturing a PVB vanishing model mold using 3D printing.
The method according to claim 1,
The 3D printing output in step (c) is characterized in that the hot water,
A method of manufacturing a PVB vanishing model mold using 3D printing.
5. The method according to claim 4,
The bath is characterized in that achieved by silicone oil,
A method of manufacturing a PVB vanishing model mold using 3D printing.
6. The method of claim 5,
The temperature of the silicone oil is characterized in that it is maintained at 80 ℃,
A method of manufacturing a PVB vanishing model mold using 3D printing.
5. The method according to claim 4,
The fumigation in step (c) is characterized in that it is performed using ethanol,
A method of manufacturing a PVB vanishing model mold using 3D printing.
8. The method of claim 7,
The fumigation is characterized in that it is carried out for 1 minute to 50 minutes,
A method of manufacturing a PVB vanishing model mold using 3D printing.
8. The method of claim 7,
Characterized in that further performing the step of heat-treating the 3D printed output after the fumigation,
A method of manufacturing a PVB vanishing model mold using 3D printing.
10. The method of claim 9,
The heat treatment is characterized in that performed at 80 ℃,
A method of manufacturing a PVB vanishing model mold using 3D printing.

Images