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Method for effectively improving 3D printing precision and strength of hollow part

A 3D printing, hollow part technology, applied in 3D object support structure, additive manufacturing, processing platform/substrate, etc., can solve the problems of printing accuracy and strength, support material cannot be recycled, moisture absorption and other problems, to simplify printing equipment Structure and function, the effect of reducing equipment development and printing costs

Pending Publication Date: 2020-11-03
XIAMEN RUNNER IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the improvement of equipment for four-axis or even five-axis motion itself is difficult to process, and secondly, the cost is too high, and due to the diversification of the part structure, the limitations are too large or even impossible to realize. Relatively speaking, water-soluble supports have more advantages, but water-soluble When the support layer is exposed to the atmospheric environment, it will more or less absorb moisture to varying degrees, which will greatly affect the accuracy and strength of the printed parts. In addition, for large-scale applications, the produced support materials cannot be recycled, which will have an impact on the environment. It can be recycled, but its recycling is also restricted, and its strength is greatly reduced

Method used

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  • Method for effectively improving 3D printing precision and strength of hollow part
  • Method for effectively improving 3D printing precision and strength of hollow part
  • Method for effectively improving 3D printing precision and strength of hollow part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Reference manual attached figure 2 , a method for effectively improving the accuracy and strength of 3D printing of hollow parts, the steps are as follows:

[0032] S1: Select tin-bismuth alloy material as the basic material of the supporting structure, melt it, and form tin-bismuth alloy printing wire after processing;

[0033] S2: Use the dual extrusion heads to print the tin-bismuth alloy printing wire and the main plastic printing wire simultaneously, and print the hollow part synchronously, thereby forming a hollow part containing the tin-bismuth alloy;

[0034] S3: After the printing is completed, remove the tin-bismuth alloy material from the hollow part by boiling or heating in an oven;

[0035] S4: Recycling the above-mentioned tin-bismuth alloy material, the above-mentioned tin-bismuth alloy material can be recycled and melted again to make a printing wire for repeated use.

[0036] The supporting material of the present invention is tin-bismuth alloy with ...

Embodiment 2

[0038] Reference manual attached image 3 , a method for effectively improving the accuracy and strength of 3D printing of hollow parts, the steps are as follows:

[0039] S1: Select tin-lead-bismuth alloy material as the basic material of the supporting structure, melt it, and form tin-lead-bismuth alloy printing wire after processing;

[0040] S2: Use the dual extrusion heads to print the tin-lead-bismuth alloy printing wire and the main plastic printing wire simultaneously, and print the hollow part synchronously, and then form the hollow part containing the tin-lead-bismuth alloy;

[0041] S3: After the printing is completed, remove the tin-lead-bismuth alloy material from the hollow part by boiling water or heating in an oven;

[0042] S4: Recycling the above-mentioned tin-lead-bismuth alloy material, the above-mentioned tin-lead-bismuth alloy material can be recycled and melted again to make a printing wire for repeated use.

[0043] The supporting material of the pres...

Embodiment 3

[0045] Reference manual attached Figure 4 , a method for effectively improving the accuracy and strength of 3D printing of hollow parts, the steps are as follows:

[0046] S1: Select the lead-bismuth alloy material as the basic material of the supporting structure, melt it, and form the lead-bismuth alloy printing wire after processing;

[0047] S2: Use the dual extrusion heads to simultaneously and separately print the lead-bismuth alloy printing wire and the main plastic printing wire, and print the hollow part synchronously, thereby forming a hollow part containing the lead-bismuth alloy;

[0048] S3: After the printing is completed, remove the lead-bismuth alloy material from the hollow part by boiling water or heating in an oven;

[0049] S4: Recycling the above-mentioned lead-bismuth alloy material, the above-mentioned lead-bismuth alloy material can be recycled and melted again to make a printing wire for reuse.

[0050] The support material of the present invention ...

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Abstract

The invention discloses a method for effectively improving 3D printing precision and strength of a hollow part. The method comprises the following steps: selecting a low-melting-point metal or alloy material as a base material of a support structure to form a support material printing wire; a supporting material and a main plastic material are printed at the same time, the hollow part is printed synchronously, and the hollow part containing the supporting material is formed; after printing is completed, the supporting material is removed; and the supporting material is recycled. According to the method, the selected supporting material is low-melting-point metal or alloy, so that when the supporting material of the low-melting-point metal or alloy is removed, the supporting material cannotbe mutually dissolved with water to generate wastewater to pollute the environment, meanwhile, water absorption and dampness are avoided, and the problems that in the printing process, due to tape casting, unstable feeding, serious part leftover materials and the like are caused and influence the precision (especially the interior of a product) and the strength of the product are solved; and in addition, the structure and functions of printing equipment can be simplified, and the equipment research and development and printing cost can be effectively reduced.

Description

technical field [0001] The invention relates to a method for effectively improving the accuracy and strength of 3D printing of hollow parts. Background technique [0002] At present, the use of 3D printing technology to produce metal parts mostly chooses SLS (Selective Laser Sintering) or SLM (Selective Laser Melting) process, the material used is metal powder, and 3D printing technology is used to produce plastic parts, especially for hollow structural parts At that time, the general solution of Qianfeng Company is: 1. Use double nozzles and a group of nozzles to print the water-soluble material support layer; 2. Single nozzle and improve the printing equipment, so that the equipment can move in four or five axes without support. However, the improvement of equipment for four-axis or even five-axis motion itself is difficult to process, and secondly, the cost is too high, and due to the diversification of the part structure, the limitations are too large or even impossible ...

Claims

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Application Information

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IPC IPC(8): B29C64/118B29C64/245B29C64/357B22F3/00B33Y10/00
CPCB22F3/002B33Y10/00B29C64/118B29C64/245B29C64/357
Inventor 戴荣昊朱江南黄贤明
Owner XIAMEN RUNNER IND CORP
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