A 3D hollow pouring seamless process

Abstract

The present invention relates to the field of hollow pouring technology, and specifically discloses a 3D hollow pouring seamless process, which includes the following steps: shaping, PET coating, indentation, PVC coating, mesh film, assembly, heating, body lamination, plaster mold, resin pouring, glue scraping, baking, transfer printing, demolding, oil sealing, and packaging and warehousing. The finished product has a 3D effect and texture, and the product specifications and sizes can also be freely selected. At the same time, the process can realize industrial assembly line batch production, greatly improving work efficiency (per capita daily output is more than 30,000 pieces) and the product qualification rate is also above 98%, thereby reducing production costs and allowing 3D hollow pouring process products to enter people's daily lives at a lower price.

Description

Technical Field

[0001] The present invention belongs to the technical field of hollow pouring, and in particular relates to a 3D hollow pouring seamless process. Background Art

[0002] Hollow cast resin jewelry is unmatched by other jewelry due to its combination of metal and resin, which offers excellent functionality and plasticity. This characteristic allows the product to highlight the visual focus while perfectly balancing harmony, giving it a very classy appearance. However, because it is produced by pouring it through a flat silicone mold, it not only completes the shaping task but also has a direct impact on the product's texture. Therefore, the production process of hollow cast resin jewelry currently requires multiple polishing cycles to achieve a high-smoothness surface. This results in significant material and component loss (with a defective product rate exceeding 20%) and low production efficiency (around 300 pieces per person per day). More importantly, some larger products cannot be produced using current technology.

[0003] With the continuous improvement of modern people's living standards, people's aesthetic level has long broken through the limitations of two dimensions and is closer to the 3D real world. However, because the above existing technologies cannot achieve the 3D effects and textures that people need, the 3D hollow pouring seamless process has become a product that people dream of. However, due to the complexity of the existing technology, it is impossible to achieve industrial process production, so low efficiency and high loss are still the current technical problems. In addition, due to the various characteristics of the above existing technologies, some large-scale hollow pouring processes are difficult to manufacture.

[0004] Art such as paintings, ornaments, and furnishings have become a blank in today's market and cannot enter people's daily lives. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a 3D hollow pouring seamless process with high production efficiency and low manufacturing cost.

[0006] To achieve this goal, one of the objectives of the present invention is to provide a 3D hollow pouring seamless process, the preparation method specifically comprising the following steps:

[0007] Step 1. Modeling: First, select a component with the same texture that is 2.5-3 times thicker than the hollow component to be produced as a mold, place it in the laser knife mold, and then use jewelry wax to shape it by internal carving. Then, place it at a 45-degree angle and bake it with an open flame into a 45-degree 3D fluid shape. Then, copy this shape into a silicone mold. Finally, punch holes in the silicone mold along the metal texture of the hollow component to make a 3D fluid silicone inner mold.

[0008] Step 2: Coating PET: First put EVA into the hot melt laminating machine and heat-melt it at 150-200℃, then coat the EVA glue on the 0.175MM thick PET film through the laminating machine to make a 0.275MM thick PET composite film;

[0009] Step 3: Cut the PET composite film into the required size by indentation, and use a laser cutter to punch the corresponding holes to make a 0.275MM thick PET side mold;

[0010] Step 4, PVC coating: first put the EVA into the hot melt laminator at 100-150℃ for hot melting, then use the laminator to coat the EVA glue on the 0.175MM thick PVC film. After it dries, use thermal sublimation ink to print the required pattern on the EVA surface to make a 0.326MM thick PVC outer film;

[0011] Step 5, mesh cloth: first use the warp and weft mesh cloth as the bottom mold, then set the mold height to 1-1.5MM and pour the adjusted silicone, then vacuum and scrape it flat and put it into the oven, then install the 1.5MM thick silicone membrane that has been dried at 100-120℃ for 60-80 minutes on a stainless steel frame to form a silicone mesh cloth vacuum box;

[0012] Step 6. Assembly: First, superimpose the PET side mold on the silicone inner mold, then put the electroplated metal hollow accessories into the 3D silicone inner mold with the same texture, and then use the 4-point positioning sleeve to fix the PVC outer film in the cloth mesh vacuum box, and then connect the Roots mercury vacuum unit;

[0013] Step 7, heating: Use infrared heating system to heat the PVC outer film in the vacuum box until the surface temperature of the PVC outer film reaches 126℃ and then becomes soft;

[0014] Step 8: Fitting: Start vacuuming the PVC outer film softened by high temperature. When the negative pressure reaches -0.1MPA and the inner surface temperature reaches 150℃, and the inner mold, outer mold, side mold and metal accessories are seamlessly and tightly integrated, stop vacuuming and turn off the temperature, then cool it down with water until the 3D hollow seamless mold reaches room temperature.

[0015] Step 9, Plaster mold: First place the stainless steel frame on the PVC outer membrane of the 3D hollow seamless mold, then pour the prepared plaster into the frame, and then scrape it flat to make a plaster protective mold pouring table;

[0016] Step 10: Resin pouring: first remove the silicone inner mold on the pouring table, then pour the prepared resin glue from the side mold into the 3D hollow combination mold for pouring;

[0017] Step 11, scraping glue: vacuum the uncast 3D hollow mold once, and then scrape off the excess glue on the side mold;

[0018] Step 12: Baking: Place the poured 3D hollow seamless mold together with the pouring table into the oven and bake at 56°C for 1 hour, then increase to 76°C and bake for another hour until dry.

[0019] Step 13, transfer: Take the baked semi-finished product together with the 3D seamless mold from the casting table and place it in a cloth mesh vacuum box. Stop vacuuming when the negative pressure reaches -0.1MPA. Then, stop heating when the temperature reaches 236℃, and then cool it with air.

[0020] Step 14: Demolding: When the temperature drops to 52°C, remove the side mold and outer mold first, and then place the semi-finished product flat on the screen;

[0021] Step 15, sealing oil: put the semi-finished stencil on the spray table to spray protective varnish, and then put it into the oven to dry;

[0022] Step 16: Packaging and storage: Take the baked products out of the oven and place them on a pallet covered with velvet. After passing the inspection, they are classified and finally individually packaged and stored.

[0023] Preferably, in step 2, the temperature in the hot melt laminating machine is 160°C.

[0024] Preferably, in step 4, the temperature in the hot melt laminating machine is 120°C.

[0025] Preferably, in step 5, first use the warp and weft mesh cloth as the bottom mold, then set the mold height to 1-1.5MM, then pour the adjusted silicone, then vacuum and flatten it and put it into the oven, and then dry the silicone membrane with a thickness of 1.5MM at 116℃ for 65 minutes and install it on a stainless steel frame to form a silicone cloth mesh vacuum box.

[0026] The advantages and positive effects of the present invention are:

[0027] The hollow poured seamless product produced by the process flow of the present invention is a breakthrough in the technical field in terms of dimension. It realizes the product of the real world and presents 3D effects and textures on the original plane. Since the process solves all problems of the existing technology from the source mold, it avoids all adverse effects on production to realize assembly line operation and obtain batch production, thereby improving work efficiency (from the original per capita daily output of about 300 to the current per capita daily output of more than 30,000), and product quality has also been greatly improved (from the original less than 80% to the current more than 98%). At the same time, it also avoids the pollution to the natural environment caused by polishing and grinding. Whether the process is applied to daily crafts or to crafts such as hanging paintings, ornaments, and furnishings, it is a product of material and cultural development to a certain level. It will bring new vitality and concepts to the beautification and decoration of the entire social life into people's daily life and be well used in home decoration. DETAILED DESCRIPTION

[0028] The present invention is further explained below with reference to the examples, but the examples do not limit the present invention in any form.

[0029] Example:

[0030] First, choose the same texture accessories that are 2.5-3 times thicker than the production accessories as the mold, use jewelry wax to carve, bake, copy, and punch to make a 3D fluid silicone inner mold, then use EVA to coat the 0.175MM thick PET with 160 degrees hot melt to make a 0.275MM thick PET edge film through indentation and punching, then coat the 0.175MM thick PVC film with 126 degrees hot melt EVA to make a 0.326MM thick PVC composite film, and perform thermal sublimation ink on the EVA surface. Print the pattern to make the PVC outer film, then dry it at 116 degrees for 65 minutes and make a 1-1.5MM thick silicone film with a cloth mesh as the mold and install it on a stainless steel frame to form a silicone cloth mesh vacuum box. Then put the PET side mold and the electroplated metal hollow accessories into the silicone inner mold and use 4 points to determine the position of the PVC outer film. Fix it in the vacuum box and connect the Roots mercury vacuum unit. Then perform infrared heating. When the surface of the PVC outer film reaches 126 degrees, start vacuum bonding. When the negative pressure reaches -0.1MPA, the inner surface temperature After the temperature reaches 150 degrees, stop vacuuming and turn off the temperature, then use water cooling to cool down to room temperature of the 3D hollow seamless mold. Secondly, pour the adjusted gypsum on the PVC outer film of the 3D hollow seamless mold in a stainless steel frame to make a gypsum protective mold pouring table, then remove the silicone inner mold on the pouring table and pour the adjusted resin into the 3D hollow mold for pouring. Then, vacuum the unpoured 3D hollow mold and the pouring table at one time, then scrape off the excess glue on the side mold, put it in the oven and heat it at 56 degrees for 1 hour. Then dry it at 76 degrees for 1 hour, then take the baked semi-finished product together with the 3D seamless mold from the casting table and put it into the cloth mesh vacuum box. Stop vacuuming when the negative pressure is -0.1MPA, then stop heating when the temperature reaches 236 degrees, and then cool it with air. When the temperature drops to 52 degrees, remove the side mold and outer film first, then flatten the semi-finished product on the mesh plate and spray it with protective varnish, then put it in the oven to dry, and then put the baked product into a pallet covered with velvet, and then classify it after passing the inspection, and finally pack it individually and put it into storage.

[0031] To sum up, the hollow poured seamless product produced by the process flow of the present invention is a breakthrough in the technical field in terms of dimension. It realizes the product of the real world and presents 3D effects and textures on the original plane. Since the process solves all the problems of the existing technology from the source mold, it avoids all adverse effects on production to realize assembly line operation and obtain batch production, thereby improving work efficiency (from the original per capita daily output of about 300 to the current per capita daily output of more than 30,000), and product quality has also been greatly improved (from the original less than 80% to the current more than 98%). At the same time, it also avoids the pollution to the natural environment caused by polishing and grinding. Whether the process is applied to daily crafts or to crafts such as hanging paintings, ornaments, and furnishings, it is a product of material and cultural development to a certain level. It will bring new vitality and concepts to the beautification and decoration of the entire social life into people's daily life and be well used in home decoration.

[0032] The applicant declares that the above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the scope of protection and disclosure of the present invention.

Claims

1. A 3D hollow pouring seamless process, characterized by: The preparation method specifically comprises the following steps: Step 1. Modeling: First, select a component with the same texture that is 2.5-3 times thicker than the hollow component to be produced as a mold, place it in the laser knife mold, and then use jewelry wax to shape it by internal carving. Then, place it at a 45-degree angle and bake it with an open flame into a 45-degree 3D fluid shape. Then, copy this shape into a silicone mold. Finally, punch holes in the silicone mold along the metal texture of the hollow component to make a 3D fluid silicone inner mold. Step 2: Coating PET: First put EVA into the hot melt laminating machine and heat-melt it at 150-200℃, then coat the EVA glue on the 0.175MM thick PET film through the laminating machine to make a 0.275MM thick PET composite film; Step 3, indentation: Cut the PET composite film into the required size, and use a laser cutter to punch the corresponding holes to make a 0.275MM thick PET side mold; Step 4, PVC coating: first put the EVA into the hot melt laminating machine and heat-melt it at 100-150℃, then use the laminating machine to coat the EVA glue on the 0.175MM thick PVC film. After it dries, use thermal sublimation ink to print the required pattern on the EVA surface to make a 0.326MM thick PVC outer film; Step 5, mesh cloth: first use the warp and weft mesh cloth as the bottom mold, then set the mold height to 1-1.5MM and pour the adjusted silicone, then vacuum and scrape it flat and put it into the oven, then install the 1.5MM thick silicone membrane that has been dried at 100-120℃ for 60-80 minutes on a stainless steel frame to form a silicone mesh cloth vacuum box; Step 6. Assembly: First, superimpose the PET side mold on the silicone inner mold, then put the electroplated metal hollow accessories into the 3D silicone inner mold with the same texture, and then use the 4-point positioning sleeve to fix the PVC outer film in the cloth mesh vacuum box, and then connect the Roots mercury vacuum unit; Step 7, heating: Use infrared heating system to heat the PVC outer film in the vacuum box until the surface temperature of the PVC outer film reaches 126℃ and then becomes soft; Step 8: Fitting: Start vacuuming the PVC outer film softened by high temperature. When the negative pressure reaches -0.1MPA and the inner surface temperature reaches 150℃, and the inner mold, outer mold, side mold and metal accessories are seamlessly and tightly integrated, stop vacuuming and turn off the temperature, then cool it down with water until the 3D hollow seamless mold reaches room temperature. Step 9, Plaster mold: First place the stainless steel frame on the PVC outer membrane of the 3D hollow seamless mold, then pour the prepared plaster into the frame, and then scrape it flat to make a plaster protective mold pouring table; Step 10: Resin pouring: first remove the silicone inner mold on the pouring table, then pour the prepared resin glue from the side mold into the 3D hollow combination mold for pouring; Step 11, scraping glue: vacuum the uncast 3D hollow mold once, and then scrape off the excess glue on the side mold; Step 12: Baking: Put the poured 3D hollow seamless mold together with the pouring table into the oven and bake at 56℃ for 1 hour, then increase to 76℃ and bake for another hour until dry. Step 13, transfer: Take the baked semi-finished product together with the 3D seamless mold from the casting table and place it in a cloth mesh vacuum box. Stop vacuuming when the negative pressure reaches -0.1MPA. Then, stop heating when the temperature reaches 236℃, and then cool it with air. Step 14: Demolding: When the temperature drops to 52°C, remove the side mold and outer mold first, and then place the semi-finished product flat on the screen; Step 15, sealing oil: put the semi-finished stencil on the spray table to spray protective varnish, and then put it into the oven to dry; Step 16: Packaging and storage: Take the baked products out of the oven and place them on a pallet covered with velvet. After passing the inspection, they are classified and finally individually packaged and stored.

2. A 3D hollow pouring seamless process according to claim 1, characterized in that: The temperature in the hot melt laminating machine in step 2 is 160°C.

3. A 3D hollow pouring seamless process according to claim 1, characterized in that: The temperature in the hot melt laminating machine in step 4 is 120°C.

4. A 3D hollow pouring seamless process according to claim 1, characterized in that: In step 5, first use the warp and weft mesh cloth as the bottom mold, then set the mold height to 1-1.5MM, then pour the adjusted silicone, then vacuum and flatten it and put it into the oven, and then install the silicone membrane with a thickness of 1.5MM after drying at 116℃ for 65 minutes on a stainless steel frame to form a silicone cloth mesh vacuum box.