3D printing post-processing method for washing supporting wax and polishing model surface layer lines

Abstract

The invention discloses a 3D printing post-treatment method for washing supporting wax and polishing surface layer grains of a model, which comprises the following steps: fully mixing alcohol, alkane and ester according to a ratio of 1: (1-3): (1-3) to prepare a mixed solution, soaking a paraffin model in the heated mixed solution, and taking out the paraffin model; the paraffin model is placed in a fuming cupboard for ventilation, so that the solvent on the surface of the model is thoroughly volatilized. The mixed solution of the alcohol, the alkane and the ester has a dissolving effect on the supporting wax and the structural wax, the supporting wax is dissolved firstly, then the surface layer grains of the structural wax are dissolved, and the effect of polishing the surface layer grains of the structural wax is achieved. By using the mixed solution, multiple times of washing is not needed, and only one time of washing is needed, so that the supporting wax can be removed completely, and the condition that the supporting wax thin layer is still attached to the surface of the model due to incomplete washing is avoided. And the polishing layer grain effect is obvious, the cost is low, the efficiency is high, and the low efficiency of manual polishing is avoided.

Description

Technical Field

[0001] The invention belongs to the field of 3D printing, and in particular relates to a 3D printing post-processing method for washing support wax and polishing layer patterns on the surface of a model. Background Art

[0002] During the printing process, the wax-spraying 3D printer first prints the support wax, and then prints the structural wax on the basis of the support wax. After printing, the support wax and structural wax are removed and the support wax is washed away to obtain a model.

[0003] The main components of support wax are higher fatty alcohols, and the main components of structural wax are high-carbon alkanes such as paraffin wax and microcrystalline wax. The structural wax is the obtained 3D printing model. Since some textures may appear on the surface of the structural wax after printing, the model needs to be polished.

[0004] Usually, a mixed solution of ethanol and isopropanol is used to wash away the support wax of the model. The use of a mixed solution is complicated and can only wash away the support wax. A layer of white support wax film may still adhere to the surface of the model, and the surface quality of the model cannot be polished to improve it. At the same time, the wax must be washed several times to clean the support wax, which is a lot of work. The manual method of polishing the surface texture of the model is inefficient, requires high manual skills, and is easy to damage the model structure. Summary of the invention

[0005] The purpose of the present invention is to provide a 3D printing post-processing method for washing support wax and polishing the surface texture of a model, thereby improving the efficiency of washing support wax and polishing the surface texture of the model.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A 3D printing post-processing method for washing support wax and polishing model surface layer patterns, comprising the following steps:

[0008] Fully mix alcohol, alkane and ester in a ratio of 1:1-3:1-3 to prepare a mixed solution, immerse the paraffin model in the heated mixed solution and then take it out;

[0009] The paraffin model is placed in a fume hood for ventilation to allow the solvent on the surface of the model to evaporate completely.

[0010] The mixed solution of alcohol, alkane and ester has a dissolving effect on both the supporting wax and the structural wax, first dissolving the supporting wax and then dissolving the surface texture of the structural wax, thereby playing the role of polishing the surface texture of the structural wax.

[0011] Preferably, the alcohol is an alcohol having 2 to 5 carbon atoms, including but not limited to ethanol, isopropanol, and n-pentanol.

[0012] Preferably, the alkane refers to an alkane having 6 to 20 carbon atoms, including but not limited to n-hexane, n-nonane, n-heptane, n-tetradecane, n-eicosane,

[0013] Preferably, the ester is an ester generated by the reaction of an acid having 2 to 7 carbon atoms and an alcohol having 2 to 7 carbon atoms, including but not limited to ethyl acetate, butyl acetate, heptyl butyrate, heptyl acetate, heptyl hexanoate, and heptyl heptanoate.

[0014] Preferably, the heating temperature is 35-40°C.

[0015] Preferably, the soaking time is 3-25 minutes.

[0016] Preferably, the stirring method is stirring by a magnetic stirrer at a stirring speed of 200 to 800 r / min.

[0017] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0018] 1. The main component of support wax is fatty alcohol. Alcohol solvents such as ethanol and isopropanol have a strong dissolving effect on support wax. Alkane solvents have a dissolving effect on both support wax and structural wax. Under the action of alcohol solvents and alkane solvents, support wax dissolves first. Ester solvents have no dissolving effect on support wax and structural wax themselves. Ester solvents can control the dissolving effect of alkane solvents on structural wax. By adjusting the ratio of alcohol, alkane and ester, the structural wax will not dissolve excessively. The addition ratio of ester has the best effect on dissolving the surface structural wax of the model, which can eliminate the lines produced during printing and produce a polishing effect.

[0019] 2. When using the mixed solution, you do not need to wash multiple times. You only need to wash once to remove the support wax completely, so as to avoid the situation where a thin layer of support wax still adheres to the surface of the model after incomplete washing.

[0020] 3. The polishing layer has obvious effect, low cost and high efficiency, avoiding the inefficiency of manual polishing.

[0021] 4. Compared with the original two-step process of wax washing and polishing, this invention only requires one step, saving production time and improving efficiency.

[0022] 5. This mixed solution can effectively control the degree of dissolution or polishing of the model, avoiding the problem of over-polishing, loss of model details and impact on model strength caused by using a single solvent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is the texture image of the sample in Example 1 before processing.

[0025] Figure 2 This is the texture image of the sample after processing in Example 1.

[0026] Figure 3 This is the texture image of the sample in Example 2 before processing.

[0027] Figure 4 This is the texture image of the sample after processing in Example 2.

[0028] Figure 5 This is the texture image of the sample in Example 3 before processing.

[0029] Figure 6 This is the texture image of the sample after processing in Example 3.

[0030] Figure 7 This is the texture image of the sample in Example 4 before processing.

[0031] Figure 8 This is the texture image of the sample after processing in Example 4.

[0032] Fig. 9 This is the texture image of the sample in Example 5 before treatment.

[0033] Fig.10 This is the texture image of the sample after processing in Example 5.

[0034] Fig.11 This is the texture image of the sample in Example 6 before processing.

[0035] Fig.12 This is the texture image of the sample after processing in Example 6.

[0036] Fig.13 This is the texture image of the sample in comparative example 1 after processing. DETAILED DESCRIPTION

[0037] FFPMS3200 advanced fatty alcohol sold by Zhejiang Flash Cast Group Co., Ltd. was used as the support wax, FFPMS1200 paraffin wax sold by Zhejiang Flash Cast Group Co., Ltd. was used as the structural wax, and Waxjet510 sold by Zhejiang Flash Cast Group Co., Ltd. was used for 3D printing.

[0038] Example 1

[0039] Ethanol, n-heptane and ethyl acetate were mixed in a mass fraction ratio of 1:1:1, 500 ml of the mixed solution was poured into a beaker, the beaker was heated on a magnetic stirrer at a temperature of 40 degrees and a stirring speed of 200 r / min, the model was placed in the beaker and soaked for 3 minutes and then taken out.

[0040] The model was placed in a fume hood for 6 hours to allow the solvent on the surface of the model to evaporate completely. The speed of the ventilation fan was 50r / s. The support wax on the model was washed clean, and the wax pattern surface was removed under a microscope.

[0041] Samples before and after treatment Figure 1 and Figure 2 shown.

[0042] Example 2

[0043] Isopropanol, n-nonane and butyl acetate were mixed in a mass fraction ratio of 1:3:3, 500 ml of the mixed solution was poured into a beaker, the beaker was heated on a magnetic stirrer at a temperature of 37 degrees and a stirring speed of 800 r / min, the paraffin model was placed in the beaker and soaked for 20 minutes and then taken out.

[0044] The model was placed in a fume hood for 5 hours to allow the solvent on the surface of the model to evaporate completely. The speed of the ventilation fan was 50r / s. The support wax on the model was washed clean, and the wax pattern surface was removed under a microscope.

[0045] Samples before and after treatment Figure 3 and Figure 4 shown.

[0046] Example 3

[0047] Mix n-butanol, n-tetradecane and heptyl butyrate in a mass fraction ratio of 1:3:2, pour 500 ml of the mixed solution into a beaker, heat the beaker on a magnetic stirrer at a temperature of 35 degrees and a stirring speed of 600 r / min, place the paraffin model in the beaker and soak it for 10 minutes before taking it out.

[0048] The model was placed in a fume hood for 4 hours to allow the solvent on the surface of the model to evaporate completely. The speed of the ventilation fan was 50r / s. The support wax on the model was washed clean, and the wax pattern on the surface was removed under a microscope.

[0049] Samples before and after treatment Figure 5 and Figure 6 shown.

[0050] Example 4

[0051] n-Pentanol, n-eicosane, and heptyl acetate were mixed in a mass fraction ratio of 1:3:3, 500 ml of the mixed solution was poured into a beaker, the beaker was heated on a magnetic stirrer at a temperature of 40 degrees and a stirring speed of 500 r / min, and the paraffin model was placed in the beaker and soaked for 25 minutes before being taken out.

[0052] The model was placed in a fume hood for 4 hours to allow the solvent on the surface of the model to evaporate completely. The speed of the ventilation fan was 50r / s. The support wax on the model was washed clean, and the wax pattern on the surface was removed under a microscope.

[0053] Samples before and after treatment Figure 7 and Figure 8 shown.

[0054] Example 5

[0055] 2-Butanol, n-tetradecane, and heptyl hexanoate were mixed in a mass fraction ratio of 1:2:2, 500 ml of the mixed solution was poured into a beaker, the beaker was heated on a magnetic stirrer at a temperature of 37 degrees and a stirring speed of 600 r / min, a paraffin model was placed in the beaker and soaked for 15 minutes and then taken out.

[0056] The model was placed in a fume hood for 4 hours to allow the solvent on the surface of the model to evaporate completely. The speed of the ventilation fan was 50r / s. The support wax on the model was washed clean, and the wax pattern on the surface was removed under a microscope.

[0057] Samples before and after treatment Fig. 9 and Fig.10 shown.

[0058] Example 6

[0059] Mix 2-methyl-1-propanol, n-hexane, and heptyl heptanoate in a mass fraction ratio of 1:3:2, pour 500 ml of the mixed solution into a beaker, place the beaker on a magnetic stirrer and heat it at a temperature of 40 degrees and a stirring speed of 600 r / min, place the paraffin model in the beaker and soak it for 3 minutes before taking it out.

[0060] The model was placed in a fume hood for 6 hours to allow the solvent on the surface of the model to evaporate completely. The speed of the ventilation fan was 50r / s. The support wax on the model was washed clean, and the wax pattern surface was removed under a microscope.

[0061] Samples before and after treatment Fig.11 and Fig.12 shown.

[0062] Comparative Example 1

[0063] Ethanol and isopropanol were mixed in a mass fraction ratio of 1:3, 500 ml of the mixed solution was poured into a beaker, the beaker was heated on a magnetic stirrer at a temperature of 40 degrees and a stirring speed of 600 r / min, the paraffin model was placed in the beaker and soaked for 5 minutes and then taken out.

[0064] The model was placed in a fume hood for 6 hours to allow the solvent on the surface of the model to evaporate completely. The speed of the ventilation fan was 50r / s. It was observed that the support wax on the model was not cleaned and adhered to the surface of the model to form a white film. Under the microscope, the wax model surface layer was not removed.

[0065] The sample after processing Fig.13 shown.

[0066] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A 3D printing post-processing method for washing support wax and polishing model surface layers, characterized in that: The steps include: Fully mix alcohol, alkane and ester in a ratio of 1:1-3:1-3 to prepare a mixed solution, immerse the paraffin model in the heated mixed solution and then take it out; The paraffin model is placed in a fume hood for ventilation to allow the solvent on the surface of the model to evaporate completely.

2. A 3D printing post-processing method for washing support wax and polishing model surface layers according to claim 1, characterized in that: The alcohol is an alcohol having 2 to 5 carbon atoms.

3. A 3D printing post-processing method for washing support wax and polishing model surface layers according to claim 1, characterized in that: The alkane refers to an alkane having 6 to 20 carbon atoms.

4. A 3D printing post-processing method for cleaning support wax and polishing model surface layers according to claim 1, characterized in that: The ester is an ester produced by the reaction of an acid having 2 to 7 carbon atoms and an alcohol having 2 to 7 carbon atoms.

5. A 3D printing post-processing method for cleaning support wax and polishing model surface layers according to claim 1, characterized in that: The heating temperature is 35-40℃.

6. A 3D printing post-processing method for cleaning support wax and polishing model surface layers according to claim 1, characterized in that: The soaking time is 3-25 minutes.

7. A 3D printing post-processing method for cleaning support wax and polishing model surface layers according to claim 1, characterized in that: The stirring method is to stir with a magnetic stirrer at a stirring speed of 200~800r / min.

Images