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3D printing precoated sand and preparation method thereof

A 3D printing, coated sand technology, applied in the field of coated sand, can solve the problems of inability to meet requirements, long cycle, low efficiency, etc., and achieve the effect of shortening product development cycle, low gas emission, and uniform texture

Active Publication Date: 2015-09-23
SHIYAN CHANGJIANG RIVER MOLDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coated sands disclosed in the above patents have their own advantages, but they still cannot meet the requirements of 3D printing.
As a result, the use of 3D printing technology to cast products has long cycle times, low efficiency and high costs.

Method used

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  • 3D printing precoated sand and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A 3D printing coated sand, comprising the following components:

[0045] Cashew nut shell 5wt %

[0046]Melamine formaldehyde resin 1wt %

[0047] Cashew nut shell liquid modified phenolic resin 1wt %

[0048] Hexatropine 0.6wt %

[0049] Lubricant 0.1 wt %

[0050] Sodium polyacrylate 0.1wt %

[0051] Aminosilane 0.1 wt %

[0052] Sodium lauryl sulfate 0.5 wt %

[0053] Raw sand balance;

[0054] According to the ratio of the above-mentioned 3D printing coated sand, make the following preparation, including the following steps:

[0055] (1) Wash the raw sand and cashew nut shells with water to remove the sediment, other sundries and crushed stones, then crush them, pass through a 110-130 mesh sieve, and grind until the particles are round;

[0056] (2) Preheat the raw sand and cashew nut shells treated above to 80-95°C, then add them to the sand mixer and mix them evenly;

[0057] (3) Add melamine formaldehyde resin, cashew nut shell liquid modified phenolic r...

Embodiment 2

[0060] A 3D printing coated sand, comprising the following components:

[0061] Cashew nut shell 6 wt %

[0062] Melamine formaldehyde resin 1.5 wt %

[0063] Cashew nut shell liquid modified phenolic resin 3 wt %

[0064] Hexatropine 0.7 wt %

[0065] Lubricant 0.2 wt %

[0066] Polyvinyl alcohol 0.2 wt %

[0067] Chlorate 0.3wt %

[0068] Borate 0.25 wt %

[0069] Methylpentanol 0.8 %

[0070] Raw sand balance;

[0071] According to the ratio of the above-mentioned 3D printing coated sand, make the following preparation, including the following steps:

[0072] (1) Wash the raw sand and cashew nut shells with water to remove the sediment, other sundries and crushed stones, then crush them, pass through a 110-130 mesh sieve, and grind until the particles are round;

[0073] (2) Preheat the raw sand and cashew nut shells treated above to 80-95°C, then add them to the sand mixer and mix them evenly;

[0074] (3) Add melamine formaldehyde resin, cashew nut shell liquid ...

Embodiment 3

[0077] A 3D printing coated sand, comprising the following components:

[0078] Cashew nut shell 8 wt %

[0079] Melamine formaldehyde resin 2 wt %

[0080] Cashew nut shell liquid modified phenolic resin 5 wt %

[0081] Hexatropine 0.8 wt %

[0082] Lubricant 0.4 wt %

[0083] Polyacrylamide 0.6wt %

[0084] Chlorate 0.2wt %

[0085] Polyethylene wax 0.4 wt %

[0086] Sodium tripolyphosphate 1 wt %

[0087] Raw sand balance;

[0088] According to the ratio of the above-mentioned 3D printing coated sand, make the following preparation, including the following steps:

[0089] (1) Wash the raw sand and cashew nut shells with water to remove the sediment, other sundries and crushed stones, then crush them, pass through a 110-130 mesh sieve, and grind until the particles are round;

[0090] (2) Preheat the raw sand and cashew nut shells treated above to 80-95°C, then add them to the sand mixer and mix them evenly;

[0091] (3) Add melamine formaldehyde resin, cashew nut ...

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Abstract

The invention relates to a precoated sand for a casting field, in particular to a 3D printing precoated sand. The 3D printing precoated sand comprises the following components: 5-8 wt% of cashew nut shells, 1-2 wt% of melamino-formaldehyde resins, 1-5 wt% of cashew nut shell liquid modified phenolic resins, 0.6-0.8 wt% of urotropin, 0.1-0.4 wt% of lubricant, 0.1-0.8 wt% of binding agents, 0.1-0.4 wt% of coupling agents, 0.5-1 wt% of dispersing agents, and the balance of crude sands. The prepared 3D printing precoated sand has high strength, high-temperature resistance, low gas generating amount and low expansion rate.

Description

technical field [0001] The invention relates to a coated sand used in the casting field, in particular to a 3D printing coated sand and a preparation method thereof. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal, sand or plastic to construct objects by layer-by-layer printing. It is often used to prepare models in mold manufacturing, industrial design and other fields. The development of new products in the traditional foundry industry requires processes such as mold opening, core making, core assembly, and casting, which are time-consuming, high in cost, and low in efficiency; the new 3D printing technology does not require mold opening, core making, and other processes, which greatly shortens the time required for new products. development cycle and improve efficiency. Due to the shortcomings of traditional coated sand in terms of str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C1/02B22C1/16
Inventor 熊杰
Owner SHIYAN CHANGJIANG RIVER MOLDING MATERIAL
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