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Additive manufacturing method for plastic powder shape-following staircase temperature bed

An additive manufacturing and temperature bed technology, applied in manufacturing tools, additive manufacturing, additive processing, etc., can solve the problems of difficulty in applying large-scale additive manufacturing of plastic parts, high cost, and inability to popularize, and achieve large-scale additive manufacturing. The effect of making plastic parts from materials, preventing the decline of physical properties, and reducing costs

Active Publication Date: 2018-05-18
SHANGHAI HANSUN MOLDING CO LTD
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  • Application Information

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Problems solved by technology

In this process, usually only 5-15% of the plastic powder can be made into plastic products, which makes the cost of laser sintering additive manufacturing of plastic products high, and it is difficult to apply to large-scale additive manufacturing of plastic parts, and has not been popularized for a long time.

Method used

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  • Additive manufacturing method for plastic powder shape-following staircase temperature bed
  • Additive manufacturing method for plastic powder shape-following staircase temperature bed
  • Additive manufacturing method for plastic powder shape-following staircase temperature bed

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Embodiment Construction

[0034] The technical features of the present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can understand.

[0035] A method for additive manufacturing of a plastic powder conformal stepped temperature bed, comprising the following steps:

[0036] A. Slice the 3D digital model of the plastic product under a specific software and generate a file that expands the laser scanning path of the selected area a2 and sintering area a3, and then import the file into the laser sintering additive manufacturing system;

[0037] B. Adding powder: Add the plastic powder for sintering into the powder tank composed of powder spreading device;

[0038] C. Powder scraping: The scraper with plastic powder added to the powder tank moves on the working platform, and the plastic powder in the powder tank is evenly spread on the working platform through the scraper;

[0039] D. Primary heating: heat the plastic powd...

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Abstract

The invention discloses an additive manufacturing method for a plastic powder shape-following staircase temperature bed. The method comprises the steps that a powder is added, the powder is scrapped,first heating is carried out, selection domain for second heating is carried out, laser sintering is carried out, one layer is dropped, and then the steps are repeated. The additive manufacturing system stops all the heating of the plastic powder; a temperature of a molding cylinder drops; and after sintering and melting, plastic powder is cooled and solidified, and a plastic products is formed. The technical defect of plastic powder degradation or excessive cross-linking during the forming process of a existing laser sintered plastic powder is overcome, the reduction of the physical propertyof the plastic powder except a sintered product in the molding cylinder due to a high temperature is prevented, recycling is carried out by avoiding being abandoned or avoiding adding a high proportion of a new powder, so that the cost of the plastic powder of the sintered plastic products is greatly reduced.

Description

【Technical field】 [0001] The invention relates to a laser sintering plastic powder additive manufacturing method of a conformal step temperature bed. 【Background technique】 [0002] The existing laser sintering plastic powder additive manufacturing process: under the 3D printing data processing system, the 3D digital model of the plastic product is sliced ​​and the laser scanning path file is generated, and then imported into the laser sintering additive manufacturing system, and the working platform in the molding cylinder is lowered by one layer , the scraper moves to evenly spread a layer of powder on the working platform, the system starts the heating element, uniformly heats all the plastic powder on the working platform to a temperature close to the melting point, and then irradiates the area to be sintered by laser scanning, so as to achieve the plastic in this area. The powder is fused and sintered together with the previous layer, as figure 1 As shown, a4 is the ar...

Claims

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Application Information

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IPC IPC(8): B29C64/135B33Y10/00
CPCB33Y10/00
Inventor 李文权
Owner SHANGHAI HANSUN MOLDING CO LTD
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