Post-curing 3D printing method
A 3D printing and molding method technology, applied in the direction of 3D object support structure, additive processing of mixture of solid materials and liquid materials, additive manufacturing, etc., can solve the waste of coated sand, the mixing uniformity of resin particles and raw sand, the use of Stability can not be effectively improved and other problems, to achieve the effect of improving uniformity, eliminating internal adhesive stress, and improving uniformity and reliability
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Embodiment 1
[0058] Post-curing 3D printing molding method of the present invention comprises the following steps:
[0059] 1) Pretreatment of coated sand
[0060] a) Add anhydrous ethanol and phenolic resin in sequence in a closed container with a stirrer, and keep stirring the mixture at 40°C to make the alcoholic solution of phenolic resin reach a saturated state;
[0061] b) In another airtight container with a mixer, add the raw sand and the mixture obtained in step a in sequence, keep the temperature in the container at 40°C, stir for 5 minutes and then place it still;
[0062] c) Cool the container in step b to normal temperature naturally, and open the container. After the ethanol is completely volatilized, the coated sand whose outer surface is wrapped with a phenolic resin film can be obtained;
[0063] 2) Printing process
[0064] d) Model input: input the model drawn by the 3D drawing software into the molding machine, and the molding machine automatically recognizes the mold...
Embodiment 2
[0074] Post-curing 3D printing molding method of the present invention comprises the following steps:
[0075] 1) Pretreatment of coated sand
[0076] a) Add anhydrous ethanol and phenolic resin in sequence in a closed container with a stirrer, and keep stirring the mixture at 60°C to make the alcoholic solution of phenolic resin saturated;
[0077] b) In another airtight container with a mixer, add the raw sand and the mixture obtained in step a sequentially, keep the temperature in the container at 60°C, stir for 20 minutes and then place it still;
[0078] c) Cool the container in step b to normal temperature naturally, and open the container. After the ethanol is completely volatilized, the coated sand whose outer surface is wrapped with a phenolic resin film can be obtained;
[0079] 2) Printing process
[0080] d) Model input: input the model drawn by the 3D drawing software into the molding machine, and the molding machine automatically recognizes the molding layer an...
Embodiment 3
[0090] Post-curing 3D printing molding method of the present invention comprises the following steps:
[0091] 1) Pretreatment of coated sand
[0092] a) Add anhydrous ethanol and phenolic resin in sequence in a closed container with a stirrer, and keep stirring the mixture at 45°C to make the alcoholic solution of phenolic resin saturated;
[0093] b) In another airtight container with a mixer, add the raw sand and the mixture obtained in step a sequentially, keep the temperature in the container at 45°C, stir for 10 minutes and then place it still;
[0094] c) Cool the container in step b to normal temperature naturally, and open the container. After the ethanol is completely volatilized, the coated sand whose outer surface is wrapped with a phenolic resin film can be obtained;
[0095] 2) Printing process
[0096] d) Model input: input the model drawn by the 3D drawing software into the molding machine, and the molding machine automatically recognizes the molding layer an...
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