CN110936613A - 3D printing sand model surface effect process treatment method - Google Patents
3D printing sand model surface effect process treatment method Download PDFInfo
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- CN110936613A CN110936613A CN201911196777.9A CN201911196777A CN110936613A CN 110936613 A CN110936613 A CN 110936613A CN 201911196777 A CN201911196777 A CN 201911196777A CN 110936613 A CN110936613 A CN 110936613A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/379—Handling of additively manufactured objects, e.g. using robots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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Abstract
The invention relates to a 3D printing sand model surface effect process treatment method, which comprises the following steps of S1: making a model and performing surface treatment; s2: bonding; s3: covering and spraying; s4: spraying weather-resistant materials; s5: and (6) coloring. The invention provides a 3D printing sand model surface effect process treatment method aiming at the defects of low strength and hardness performance, poor effect after direct surface coloring of a sand model, obvious seam traces during assembling and splicing of the sand model, moisture regain of the sand model, pigment falling off, short service life of a product and the like of the sand model or other powder molded models in the prior art. The method has the advantages of low cost, easy operation, realization of industrialized and large-scale production and application, and high practicability.
Description
Technical Field
The invention relates to the field of cultural relics sculpture and the field of 3D printing, in particular to a surface effect process treatment method of a 3D printing sand model.
Background
3D printing is one of the fast forming technologies, which is a solid body formed by printing layer by using adhesive materials such as powdered metal, plastic, ceramic, sand, silicon carbide powder, gypsum material, rubber material and the like on the basis of a digital model file. The 3D printing technology is usually used for manufacturing models in the fields of mold manufacturing, industrial design and the like, no technical requirements are required for surface coloring, but the 3D printing model is required to be colored in the field of creative sculpture of the literature, and high-additional products are produced through development and application of intellectual property rights, so that the models are more attractive and artistic expressive force is endowed.
The existing 3DP sand model has the following three disadvantages and problems:
(1) the sand model which is not subjected to post-treatment has lower strength and hardness performance, and is easy to crack and damage during field operations such as lifting, carrying, overturning, transportation and the like;
(2) the sand model has rigid color and no artistic expression;
(3) the effect of direct surface coloring of the sand model is poor, so that the sand model has obvious joint trace during assembling and splicing, and the sand model has the defects of moisture regain, decoloration, pigment falling and the like, so that the service life of the product is short;
the defects and the problems seriously influence the popularization and the application of the 3D printing sand model in the field of the literary wound sculpture. Therefore, in order to solve the above technical problems, a set of sand model surface effect process treatment method is proposed, which is a problem to be solved in the field.
Disclosure of Invention
The invention provides a 3D printing sand model surface effect process treatment method aiming at the defects of low strength and hardness performance of the sand model or other powder molded models, poor effect after direct surface coloring of the sand model, obvious seam traces during assembling and splicing of the sand model, moisture regain of the sand model, pigment falling off, short service life of products and the like.
In order to solve the defects, the invention adopts the technical scheme that:
A3D printing sand model surface effect process treatment method comprises the following steps:
s1: making a model and performing surface treatment; establishing model data through three-dimensional modeling software, and printing a sand model in a layer-by-layer bonding mode by using a 3D sand mold printer; after sand cleaning, using sand paper to polish and repair the surface, polishing surface step lines, uniformly coating the surface of the sand mold model with the reinforcing glue, coating for 2-3 times to enable a surface glue permeation layer to reach 1-10 mm, standing until AB glue on the surface of the model is completely cured, and improving the compression resistance and tensile strength of the surface of the sand mold model;
s2: bonding; splicing the sand model with the completely solidified surface layer by using a binder according to a splicing sequence, and bonding and fixing the spliced part by using the binder;
s3: covering and spraying; filling gaps and depressions with a spraying material, and leveling with a scraper; after the spraying material is dried, carrying out secondary polishing by using abrasive paper; uniformly spraying a spraying material on the surface of the spliced sand mold model;
s4: spraying weather-resistant materials; uniformly spraying the weather-resistant material on the surface of the sand model in a spraying mode, carrying out secondary spraying after the sand model is dried for 2-4 hours, and standing for 2-4 hours to dry the sand model;
s5: coloring; and uniformly brushing coloring pigment on the convex part of the surface structure of the model in a brushing way.
Furthermore, the strengthening layer is attached to the model when in a liquid state, and is in a solid state after being solidified, the hardness of the model attached with the strengthening layer is not lower than 85HD, and the tensile strength is not lower than 15 MPa.
Furthermore, the strengthening layer is attached to the model when in a liquid state, can permeate into the model made of the particle material, and is integrated with the model after being solidified into a solid state at the later stage.
Further, the strengthening layer is made of at least one of furan resin, polyurea resin, modified polyurea resin, polyurethane resin, phenolic resin, urea resin, melamine-formaldehyde resin, epoxy resin, polyurethane modified organic silicon resin, xanthan gum, polyvinyl acetate emulsion, polyacrylamide, ethyl silicate, silica sol, sulfate, rosin, syrup, sesbania gum, coal tar, asphalt, polyvinyl acetal, ethylene-vinyl acetate copolymer, phenolic-butyronitrile gum, phenolic-neoprene gum, phenolic-polyurethane gum, epoxy-butyronitrile gum, unsaturated polyester, acrylic resin, polyimide, polybenzimidazole, epoxy resin AB gum, epoxy-polyamide AB gum and phenolic-epoxy resin AB gum.
Further, the reinforcing glue in step S1 is preferably an epoxy AB glue.
Further, the strengthening layer penetrates into the surface of the model by at least 3 mm.
Further, the adhesive in step S2 is at least one of a structural adhesive, a marble adhesive, an acrylate AB adhesive, and an EVA hot melt adhesive.
Further, the adhesive in step S2 is preferably 995 silicone structural adhesive and marble adhesive.
Further, the spraying thickness in the step S3 is 0.3-0.5 mm.
Further, the covering material in the step S3 is a mixture of silica sand and furan resin, structural adhesive, a box sealing mud strip, and a real stone paint.
Further, the covering material in step S3 is preferably a real stone paint.
Further, the material of the weather-resistant layer in the step S4 has alkali-resistant, waterproof and weather-resistant properties.
Further, the weather-resistant layer material in the step S4 is at least one of paint, acrylic pigment, exterior wall emulsion paint, epoxy zinc-rich primer, epoxy floor paint, alkyd enamel, nitro enamel, polyurethane enamel and fluorocarbon paint.
Further, the weather-resistant layer material in the step S4 is preferably an exterior wall latex paint group.
Further, the coloring process in the step S5 includes a single color coloring process and a composite color coloring process; the monochromatic coloring treatment only comprises one pigment; the pigment for coloring the composite color at least comprises two pigments.
Compared with the prior art, the method of the invention has the following beneficial effects:
the surface effect process treatment method for the 3D printing sand model effectively overcomes the defects of low strength and hardness performance of the model, poor effect after direct surface coloring of the sand model, short service life of a product and the like in the prior art. The processing method greatly improves the strength and the hardness of the model, endows the model with stronger artistic expressive force, enables the model to be used or placed for a long time even in a humid, acid-base environment, and prolongs the service life of the product. The method has the advantages of low cost, easy operation, realization of industrialized and large-scale production and application, and high practicability.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying examples. The preferred embodiments of the present invention are given in the examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A3D printing sand model surface effect process treatment method comprises the following steps:
s1: making a model and performing surface treatment; establishing model data through three-dimensional modeling software, and printing a sand model in a layer-by-layer bonding mode by using a 3DP sand mould printer; after sand cleaning, using sand paper to polish and repair the surface, polishing surface step lines, uniformly coating epoxy resin AB glue on the surface of the sand mold model, coating for 2-3 times to ensure that a surface glue solution permeation layer reaches 3-5 mm, standing until the AB glue on the surface of the model is completely cured, and improving the compression resistance and tensile strength of the surface of the sand mold model;
s2: bonding; splicing the sand model with the completely solidified surface layer by using a binder according to a splicing sequence, and bonding and fixing the spliced part by using the binder;
s3: covering and spraying; filling gaps and depressions with a spraying material, and leveling with a scraper; after the spraying material is dried, carrying out secondary polishing by using abrasive paper; uniformly spraying a spraying material on the surface of the spliced sand mold model;
s4: spraying weather-resistant materials; uniformly spraying the weather-resistant material on the surface of the sand model in a spraying mode, carrying out secondary spraying after the sand model is dried for 2-4 hours, and standing for 2-4 hours to dry the sand model;
s5: coloring; and uniformly brushing coloring pigment on the convex part of the surface structure of the model in a brushing way.
Furthermore, the strengthening layer is attached to the model when in a liquid state, and is in a solid state after being solidified, the hardness of the model attached with the strengthening layer is not lower than 85HD, and the tensile strength is not lower than 15 MPa.
Furthermore, the reinforcing layer material is attached to the model when in a liquid state, can permeate into the model made of the particle material, and is integrated with the model after being solidified into a solid state at a later stage.
Further, the strengthening layer is made of at least one of furan resin, polyurea resin, modified polyurea resin, polyurethane resin, phenolic resin, urea resin, melamine-formaldehyde resin, epoxy resin, polyurethane modified organic silicon resin, xanthan gum, polyvinyl acetate emulsion, polyacrylamide, ethyl silicate, silica sol, sulfate, rosin, syrup, sesbania gum, coal tar, asphalt, polyvinyl acetal, ethylene-vinyl acetate copolymer, phenolic-butyronitrile gum, phenolic-neoprene gum, phenolic-polyurethane gum, epoxy-butyronitrile gum, unsaturated polyester, acrylic resin, polyimide, polybenzimidazole, epoxy resin AB gum, epoxy-polyamide AB gum and phenolic-epoxy resin AB gum.
Further, the strengthening layer penetrates into the surface of the model by at least 3 mm.
Further, the adhesive in step S2 is at least one of a structural adhesive, a marble adhesive, an acrylate AB adhesive, and an EVA hot melt adhesive.
Further, the adhesive in step S2 is preferably 995 silicone structural adhesive and marble adhesive.
Further, the spraying thickness in the step S3 is 0.3-0.5 mm.
Further, the covering material in the step S3 is a mixture of silica sand and furan resin, structural adhesive, a box sealing mud strip, and a real stone paint.
Further, the covering material in step S3 is preferably a real stone paint.
Further, the material of the weather-resistant layer in the step S4 has alkali-resistant, waterproof and weather-resistant properties.
Further, the weather-resistant layer material in the step S4 is at least one of paint, acrylic pigment, exterior wall emulsion paint, epoxy zinc-rich primer, epoxy floor paint, alkyd enamel, nitro enamel, polyurethane enamel and fluorocarbon paint.
Further, the weather-resistant layer material in the step S4 is preferably an exterior wall latex paint group.
Further, the coloring process in the step S5 includes a single color coloring process and a composite color coloring process; the monochromatic coloring treatment only comprises one pigment; the pigment for coloring the composite color at least comprises two pigments.
Example 1
A3D printing sand model surface effect process treatment method is used for carrying out single-color surface effect process treatment and comprises the following steps:
s1: making a model and performing surface treatment; a sand model is made by selecting 100-mesh silica sand, printing by a material additive manufacturing 3DP technology, and polishing surface step lines by 150-mesh sand paper after sand cleaning. Uniformly coating the epoxy resin AB glue on the surface of a sand mold model, coating for 3 times to enable a surface glue solution permeable layer to reach 5mm, naturally curing at room temperature, wherein the final curing needs 48 hours and the hardness is 90 HD.
S2: bonding; and splicing the sand model with the completely cured surface layer according to a splicing sequence, wherein the splicing part is bonded by using structural adhesive and is rapidly fixed by matching with marble adhesive.
S3: covering and spraying; and (3) filling gaps and depressions with 120-mesh pure black real stone paint, and leveling by using a scraper. And after the stone paint is dried, carrying out secondary grinding by using 120-mesh abrasive paper, uniformly spraying 120-mesh pure black stone paint on the surface of the spliced sand mold model, wherein the spraying thickness is 0.4mm, and the spraying at this time plays a role in covering the gap repairing part.
S4: spraying weather-resistant materials; using external wall latex primer, adding 20% of water, stirring uniformly, uniformly spraying on the surface of the sand model by using a spraying mode, and spraying finish paint after the sand model is dried for 3 hours, wherein the mixing ratio of the finish paint to the black slurry is 3: 1, adding 20% of water, uniformly stirring, uniformly spraying on the surface of a sand model by using a spraying mode, and standing for 3 hours to dry thoroughly.
S5: carrying out single-color coloring treatment; the brass coloring effect uses pearlescent gold copper propylene pigment, and the pearlescent gold copper propylene pigment is uniformly coated on the raised part of the surface structure of the model in a brushing mode.
Example 2
A3D printing sand model surface effect process treatment method is used for carrying out single-color surface effect process treatment and comprises the following steps:
s1: making a model and performing surface treatment; a sand model is made by selecting 100-mesh silica sand, printing by a material additive manufacturing 3DP technology, and polishing surface step lines by 150-mesh sand paper after sand cleaning. Uniformly coating the epoxy resin AB glue on the surface of a sand mold model, coating for 3 times to enable a surface glue solution permeable layer to reach 5mm, naturally curing at room temperature, wherein the final curing needs 48 hours and the hardness is 90 HD.
S2: bonding; and splicing the sand model with the completely cured surface layer according to a splicing sequence, wherein the splicing part is bonded by using structural adhesive and is rapidly fixed by matching with marble adhesive.
S3: covering and spraying; and (3) filling gaps and depressions with 120-mesh pure black real stone paint, and leveling by using a scraper. And after the stone paint is dried, carrying out secondary grinding by using 120-mesh abrasive paper, uniformly spraying 120-mesh pure black stone paint on the surface of the spliced sand mold model, wherein the spraying thickness is 0.4mm, and the spraying at this time plays a role in covering the gap repairing part.
S4: spraying weather-resistant materials; using external wall latex primer, adding 20% of water, stirring uniformly, uniformly spraying on the surface of the sand model by using a spraying mode, and spraying finish paint after the sand model is dried for 3 hours, wherein the mixing ratio of the finish paint to the black slurry is 3: 1, adding 20% of water, uniformly stirring, uniformly spraying on the surface of a sand model by using a spraying mode, and standing for 3 hours to dry thoroughly.
S5: carrying out single-color coloring treatment; the coloring effect of the red copper is that pearlescent red copper propylene pigment is uniformly coated on the raised part of the surface structure of the model in a brushing way.
Example 3
A surface effect process treatment method of a 3D printing sand model is used for carrying out surface effect process treatment of composite color, and comprises the following steps:
s1: making a model and performing surface treatment; a sand model is made by selecting 150-mesh silica sand, printing by adopting a material additive manufacturing 3DP technology, and polishing surface step lines by using 200-mesh sand paper after sand cleaning. Uniformly coating the epoxy resin AB glue on the surface of a sand mold model, coating for 3 times to enable a surface glue solution permeable layer to reach 4.5mm, naturally curing at room temperature, wherein the final curing needs 48 hours and the hardness is 92 HD.
S2: bonding; and splicing the sand model with the completely cured surface layer according to a splicing sequence, wherein the splicing part is bonded by using structural adhesive and is rapidly fixed by matching with marble adhesive.
S3: covering and spraying; and (4) filling gaps and depressions with 130-mesh pure black stone-like paint, and leveling by using a scraper. After the stone-like paint is dried, 130-mesh abrasive paper is used for secondary polishing, 130-mesh pure black stone-like paint is used for being uniformly sprayed on the surface of the spliced sand mold model, the spraying thickness is 0.3mm, and the spraying at this time plays a role in covering the gap repairing part.
S4: spraying weather-resistant materials; using external wall latex primer, adding 20% of water, stirring uniformly, uniformly spraying on the surface of the sand model by using a spraying mode, and spraying finish paint after the sand model is dried for 3 hours, wherein the mixing ratio of the finish paint to the black slurry is 3: 1, adding 20% of water, uniformly stirring, uniformly spraying on the surface of a sand model by using a spraying mode, and standing for 3 hours to dry thoroughly.
S5: coloring the composite color; the pottery clay is used for making old and coloring; and (3) coating the ground color with an earthy yellow propylene pigment, coating the ocher propylene pigment on concave and hollow parts, and uniformly coating the cooked herring propylene pigment on convex parts of the surface structure of the model in a coating mode.
Example 4
A surface effect process treatment method of a 3D printing sand model is used for carrying out surface effect process treatment of composite color, and comprises the following steps:
s1: making a model and performing surface treatment; a sand model is made by selecting 150-mesh silica sand, printing by adopting a material additive manufacturing 3DP technology, and polishing surface step lines by using 200-mesh sand paper after sand cleaning. Uniformly coating the epoxy resin AB glue on the surface of a sand mold model, coating for 3 times to enable a surface glue solution permeable layer to reach 4.5mm, naturally curing at room temperature, wherein the final curing needs 48 hours and the hardness is 92 HD.
S2: bonding; and splicing the sand model with the completely cured surface layer according to a splicing sequence, wherein the splicing part is bonded by using structural adhesive and is rapidly fixed by matching with marble adhesive.
S3: covering and spraying; and (4) filling gaps and depressions with 130-mesh pure black stone-like paint, and leveling by using a scraper. After the stone-like paint is dried, 130-mesh abrasive paper is used for secondary polishing, 130-mesh pure black stone-like paint is used for being uniformly sprayed on the surface of the spliced sand mold model, the spraying thickness is 0.3mm, and the spraying at this time plays a role in covering the gap repairing part.
S4: spraying weather-resistant materials; using external wall latex primer, adding 20% of water, stirring uniformly, uniformly spraying on the surface of the sand model by using a spraying mode, and spraying finish paint after the sand model is dried for 3 hours, wherein the mixing ratio of the finish paint to the black slurry is 3: 1, adding 20% of water, uniformly stirring, uniformly spraying on the surface of a sand model by using a spraying mode, and standing for 3 hours to dry thoroughly.
S5: coloring the composite color; bronze antique coloring effect; blue-green propylene pigment is coated on the concave and hollow parts, and golden propylene pigment is uniformly coated on the convex parts of the surface structure of the model in a brush coating mode.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A3D printing sand model surface effect process treatment method is characterized by comprising the following steps:
s1: making a model and performing surface treatment; establishing model data through three-dimensional modeling software, and printing a sand model in a layer-by-layer bonding mode by using a 3D sand mold printer; after sand cleaning, using abrasive paper to polish and repair the surface, polishing surface step lines, uniformly coating the surface of the sand mold model with the reinforcing glue, coating for 2-3 times to enable the surface glue solution permeation layer to reach 1-10 mm, standing until the AB glue is completely cured to form a reinforcing layer;
s2: bonding; splicing the sand model with the completely solidified surface layer by using a binder according to a splicing sequence, and bonding and fixing the spliced part by using the binder;
s3: covering and spraying; filling gaps and depressions with a spraying material, and leveling with a scraper; after the spraying material is dried, carrying out secondary polishing by using abrasive paper; uniformly spraying a spraying material on the surface of the spliced sand mold model;
s4: spraying weather-resistant materials; uniformly spraying the weather-resistant material on the surface of the sand model in a spraying mode, carrying out secondary spraying after the sand model is dried for 2-4 hours, and standing for 2-4 hours to dry the sand model;
s5: coloring; and uniformly brushing coloring pigment on the convex part of the surface structure of the model in a brushing way.
2. The 3D printing sand model surface effect process treatment method as claimed in claim 1, wherein the binder in the step S2 is at least one of a structural adhesive, a marble adhesive, an acrylate AB adhesive and an EVA hot melt adhesive.
3. The method for processing the surface effect process of the 3D printing sand model according to claim 2, wherein the bonding agent in the step S2 is preferably 995 silicone structural adhesive and marble adhesive.
4. The surface effect processing method of the 3D printing sand model as claimed in claim 1, wherein the spraying thickness in the step S3 is 0.3-0.5 mm.
5. The 3D printing sand model surface effect processing method as claimed in claim 1, wherein the covering material in the step S3 is silica sand and furan resin mixture, structural adhesive, box sealing mud strip and stone paint.
6. The 3D printing sand model surface effect processing method as claimed in claim 5, wherein the covering material in the step S3 is preferably a real stone paint.
7. The method for processing the surface effect of the 3D printing sand model as recited in claim 1, wherein the weather-resistant layer material in the step S4 has alkali-resistant, waterproof and weather-resistant properties.
8. The method for processing the surface effect process of the 3D printing sand model according to the claim 7, wherein the weather-resistant layer material in the step S4 is at least one of paint, acrylic pigment, exterior wall latex paint, epoxy zinc-rich primer, epoxy floor paint, alkyd enamel paint, nitro enamel paint, polyurethane enamel paint and fluorocarbon paint.
9. The method for processing the surface effect of the 3D printing sand model according to claim 1, wherein the weather-resistant layer material in the step S4 is preferably an exterior wall latex paint group.
10. The 3D printing sand model surface effect processing method as claimed in claim 1, wherein the coloring treatment in the step S5 comprises a single color coloring treatment and a composite color coloring treatment; the monochromatic coloring treatment only comprises one pigment; the pigment for coloring the composite color at least comprises two pigments.
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| CN112371918A (en) * | 2020-11-13 | 2021-02-19 | 维捷(苏州)三维打印有限公司 | High-strength printing mode for sand mold |
| CN113427765A (en) * | 2021-05-28 | 2021-09-24 | 共享智能铸造产业创新中心有限公司 | 3D printing-based model to be displayed forming method and forming system |
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