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Low-temperature 3D printing degradable green material for precision casting of a fired mold and preparation method of low-temperature 3D printing degradable green material

A 3D printing and precision casting technology, applied in the field of 3D printing materials, can solve the problems of easy generation of harmful gas, high temperature of wax removal, high energy consumption, etc., and achieve the effect of not easy to break wire, save energy, and low viscosity

Active Publication Date: 2021-09-24
CHENGDU AERONAUTIC POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above deficiencies or defects, the purpose of the present invention is to provide a low-temperature 3D printing degradable green material for investment casting investment and its preparation method, which can effectively solve the problems of high energy consumption and high wax removal temperature in the prior art. And the problem of easy generation of harmful gases, at the same time, the 3D printing material can be degraded into harmless substances in the natural environment, green and environmentally friendly

Method used

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  • Low-temperature 3D printing degradable green material for precision casting of a fired mold and preparation method of low-temperature 3D printing degradable green material
  • Low-temperature 3D printing degradable green material for precision casting of a fired mold and preparation method of low-temperature 3D printing degradable green material

Examples

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Effect test

Embodiment 1

[0031] This example provides a low-temperature 3D printing degradable green material for investment casting investment, including the following raw materials in parts by mass: 100 parts of thermoplastic polyurethane, 10 parts of polycaprolactone (PCL), 5 parts of plasticizer and additives 0.5 parts; wherein, the melting temperature of thermoplastic polyurethane is 80-140°C, the molecular weight of polycaprolactone is 1000-60000, the auxiliary agent is zinc acetylacetonate, and the plasticizer is epoxy soybean oil.

[0032] The above-mentioned preparation method of low-temperature 3D printing degradable green materials for precision casting investment molds, the specific process is: dry the raw materials in a vacuum oven at 55 degrees for 24 hours; The time is 7 minutes; among them, the twin-screw temperature is set to 60°C in the feed section, 140°C in the compression section, 180°C in the metering section, and 150°C in the die head.

[0033] The 3D printed physical picture ma...

Embodiment 2

[0035] This example provides a low-temperature 3D printing degradable green material for investment casting investment, including the following raw materials in parts by mass: 100 parts of thermoplastic polyurethane, 40 parts of polycaprolactone (PCL), 15 parts of polyethylene glycol (PEG) 20 parts of plasticizer, 1 part of additive and 5 parts of filler; among them, the melting temperature of thermoplastic polyurethane is 80-140 ℃, the molecular weight of polycaprolactone is 1000-60000, and the molecular weight of polyethylene glycol is 800-4000 , the auxiliary agent is stannous octoate, the plasticizer is dioctyl phthalate, and the filler is diatomaceous earth.

[0036] The above-mentioned preparation method of low-temperature 3D printing degradable green materials for precision casting investment molds, the specific process is: dry the raw materials in a vacuum oven at 55 degrees for 24 hours; The time is 7 minutes; among them, the twin-screw temperature is set to 60°C in t...

Embodiment 3

[0038] This example provides a low-temperature 3D printing degradable green material for investment casting investment, including the following raw materials in parts by mass: 100 parts of thermoplastic polyurethane, 100 parts of polycaprolactone (PCL), 30 parts of polyethylene glycol (PEG) 40 parts, 40 parts of plasticizer, 2 parts of additives and 10 parts of filler; among them, the melting temperature of thermoplastic polyurethane is 80-140 ℃, the molecular weight of polycaprolactone is 1000-60000, and the molecular weight of polyethylene glycol is 800-4000 , the auxiliary agent is stannous octoate, the plasticizer is dioctyl phthalate, and the filler is diatomaceous earth.

[0039] The above-mentioned preparation method of low-temperature 3D printing degradable green materials for precision casting investment molds, the specific process is: dry the raw materials in a vacuum oven at 55 degrees for 24 hours; The time is 7 minutes; among them, the twin-screw temperature is se...

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Abstract

The invention discloses a low-temperature 3D printing degradable green material for precision casting of a fired mold and a preparation method of the low-temperature 3D printing degradable green material, and belongs to the technical field of 3D printing materials. The material comprises the following raw materials by mass: 40-100 parts of thermoplastic polyurethane, 10-100 parts of polycaprolactone, 0-40 parts of polyethylene glycol, 5-50 parts of a plasticizer, 0.5-2 parts of an auxiliary agent and 0-30 parts of a filler. The melting temperature of the 3D printing material ranges from 60 DEG C to 120 DEG C and is far lower than the decomposition temperature of the 3D printing material, the viscosity is low after melting, the fluidity is good, 'wax models' are convenient to remove, high-temperature gasification is not needed, a large amount of harmful gas is generated, and energy is saved; and meanwhile, the characteristics of high hardness and simple preparation process are achieved.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a low-temperature 3D printing degradable green material for precision casting investment patterns and a preparation method thereof. Background technique [0002] 3D printing (3DP) is a kind of rapid prototyping technology, also known as additive manufacturing. It is based on digital model files, using powdered metal or plastic and other bondable materials to form physical objects by layer-by-layer superposition. Printed body technology, the manufacturing technology has been widely used in industrial fields, such as jewelry, footwear, industrial design, automotive, aerospace and medical industries. [0003] Precision casting is also called lost wax casting. Its products are precise, complex, and close to the final shape of the parts, and can be used directly without processing or simple processing. Therefore, investment casting is an advanced technology near net shap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L67/04C08L71/02C08L91/00C08K5/12C08K7/26B33Y70/10
CPCC08L75/04B33Y70/10C08L2201/06C08L67/04C08L71/02C08L91/00C08K5/12C08K7/26
Inventor 孟兵袁品均
Owner CHENGDU AERONAUTIC POLYTECHNIC
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