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PLA modified material applied to 3D printing of large casting molds, and method of PLA modified material

A casting mold, 3D printing technology, applied in the direction of additive processing, etc., can solve problems such as unfavorable workpiece molding, affecting processing accuracy, wasting printing materials, etc., to achieve the effect of improving toughness, convenient operation, and high printing accuracy

Inactive Publication Date: 2016-10-12
NINGXIA KOCEL MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many defects in the PLA modified materials currently on the market when applied to 3D printing large-scale casting molds. For example, it is easy to be damp, and the printing material is damp, which will affect the smoothness of extrusion after melting, and easily lead to blockage of the nozzle, which is not conducive to the workpiece. Molding; plastic materials have shrinkage during the process of solidification after melting, which makes the workpiece warp or fall off during the printing process and deforms the workpiece after printing, which affects the processing accuracy and wastes printing materials; sometimes it also causes air bubbles during printing

Method used

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  • PLA modified material applied to 3D printing of large casting molds, and method of PLA modified material

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preparation example Construction

[0031] At the same time, the present invention also provides a method for preparing a PLA modified material for 3D printing of large casting molds, comprising the following steps:

[0032] a. Drying of raw materials: dry the polylactic acid resin and toughening agent at 80-100°C for 4-6 hours, and set aside;

[0033] b. Inorganic filler and coupling agent treatment: make the aqueous solution of the coupling agent, then add acetic acid to adjust the pH value to 5, add the solution to the inorganic filler in the form of spray, then mix it with a high-speed mixer, and let it stand for half an hour. Bake at 50-60°C for half an hour, then raise the temperature to 80-100°C to dry the inorganic filler and set aside;

[0034] c. Blending: Add all the above materials into the high-speed mixing mixer in proportion, and stir evenly;

[0035] d. Granulation: Add the above-mentioned uniformly stirred mixture into a twin-screw extruder for extrusion and granulation. The extrusion tempe...

Embodiment 1

[0038] The invention provides a PLA specially used for 3D printing large-scale casting molds with the advantages of small shrinkage, good dimensional stability, high strength, not easy to be affected by moisture, low price, easy degradation, environmental protection, non-toxic, non-irritating, and non-polluting. Modified material, the mass ratio of each chemical component is: 100 parts of polylactic acid resin; 10 parts of talcum powder as inorganic filler; 1 part of dioctyl phthalate as plasticizer; polybutylene succinate 0.1 part of alcohol ester as a toughening agent; 2 parts of KH-560 as a coupling agent; 0.5 part of 2-imidazolidinone as a chain extender; 0.3 part of a mixture of tetraerythritol ester and triphosphite The mass ratio of the two is 1:2, as an antioxidant; 0.7 parts of a mixture of polycarbodiimide and monocarbodiimide, and the mass ratio of the two is 5:2, as an anti-hydrolysis agent; maleic anhydride grafted 2 parts of macromolecule, as a compatibilizer; 0....

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Abstract

The invention relates to the technical field of high polymer materials, the technical field of 3D printing, and the field of 3D casting, in particular to a PLA modified material applied to 3D printing of large casting molds, and a method of the PLA modified material. The invention provides the PLA modified material applied to 3D printing of large casting molds, and the PLA modified material comprises the following components: polylactic resin, an inorganic filler, a plasticizer, a flexibilizer, a coupling agent, a chain extender, an antioxidant, an anti-hydrolysis agent, a compatilizer, and a lubricant. To overcome defects in the prior art, the invention creatively develops the PLA modified material specially applied to 3D printing of large casting molds, and the PLA modified material has the advantages of being low in shrinking percentage, good in dimensional stability, high in strength, not liable to be affected with damp, low in price, easy to degrade, environment-friendly, non-toxic, non-irritant, non-pollution and the like.

Description

technical field [0001] The present invention relates to the technical field of polymer materials, the technical field of 3D printing and the field of 3D casting, in particular to a PLA modified material for 3D printing of large casting molds and a method thereof. Background technique [0002] Polylactic acid (PLA) and its copolymers are synthetic polymer materials with excellent biocompatibility and biodegradability. It is non-toxic, non-irritating, strong plasticity, easy to process, easy to be decomposed and replaced by various microorganisms in nature or enzymes in animals and plants, and finally forms water and carbon dioxide, and does not pollute the environment, so it is considered to be the most promising. biodegradable polymer materials. Polylactic acid has a wide range of uses, and has been used in biodegradable fibers, biodegradable plastic products, and drug sustained-release materials, bone surgery materials, surgical sutures, ophthalmic materials, etc. New prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L79/00C08L51/04C08L51/06C08L51/00C08K13/02C08K5/11C08K3/26C08K3/34C08K5/29B33Y70/00
CPCC08L67/04B33Y70/00C08K2201/011C08L2201/06C08L2205/02C08L2205/035C08L2205/06C08L2205/08C08L67/02C08L79/00C08L51/00C08K13/02C08K5/12C08K3/34C08K5/20C08K5/29C08L51/04C08K5/11C08K2003/265C08K5/098C08L51/06
Inventor 李天才
Owner NINGXIA KOCEL MOLD
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