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Building cylinder arrangement for a machine for the layer-by-layer production of three-dimensional objects

A three-dimensional object, layer-by-layer manufacturing technology, applied in the direction of processing and manufacturing, manufacturing tools, additive manufacturing, etc., can solve the problems of leaky pistons, jamming, etc., and achieve the effect of avoiding oxidation

Inactive Publication Date: 2018-03-16
TRUMPF LASERSYST FOR SEMICON MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Temperature gradients can easily lead to deformations of the piston or the piston rings or also the basic body, which are practically not corrected, which can lead to leaks or even jamming of the piston

Method used

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  • Building cylinder arrangement for a machine for the layer-by-layer production of three-dimensional objects
  • Building cylinder arrangement for a machine for the layer-by-layer production of three-dimensional objects
  • Building cylinder arrangement for a machine for the layer-by-layer production of three-dimensional objects

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Embodiment Construction

[0071] figure 1 The upper end region of an embodiment of a construction cylinder assembly 1 according to the invention is shown, comprising a substantially cylindrical tubular base body 2 and a piston 4 displaceable in the base body along a cylinder axis 3 .

[0072] The base body 2 is formed on the inside with a cylindrical tubular insulation 5 made of opaque quartz glass. The quartz glass has a thermal conductivity of approximately 2W / (m*K).

[0073] The separator 5 is held by a locking ring 6 configured with cooling water channels 7 and passed through a ceramic fabric (e.g. Al 2 o 3 The packing sleeve 8 made of fabric) clamps the spacer 5. The insulating body 5 is generally surrounded by a cylindrical tubular outer body 9 , which here is constructed of steel. Between the outer body 9 and the insulating body 5 is arranged a thermal insulation 10 , which here is made of a ceramic fiber mat.

[0074] Furthermore, the base body 2 is equipped with hook elements 11 , by mea...

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Abstract

A building cylinder arrangement (1) for a machine (70) for the layer-by-layer production of three-dimensional objects (71) by laser sintering or laser melting of powdered material (74), with a substantially cylindrical shell-shaped main body (2) and a piston (4) that can move on an inner side of the main body (2) along a cylinder axis (3) of the main body (2), wherein the piston (4) has on its upper side a substrate (21) for the growing of the three-dimensional objects (71), is characterized in that the main body (2) comprises a substantially cylindrical shell-shaped insulating body (5), whichforms at least the inner side of the main body (2), wherein the insulating body (5) consists of a material with a specific thermal conductivity Lamuda IK, where Lamuda IK is equal to or smaller thans 3 W / (m*K), in that the piston (4) is formed with an upper part (12) and a lower part (14), wherein the upper part (12) comprises the substrate (21), and wherein the lower part (14) has a cooling device (18), in particular a system of cooling water channels, and in that a first seal (20) of elastomer material is provided on the lower part (14) and is used to provide a gas-tight seal for the lowerpart (14) of the piston (4) with respect to the inner side of the main body (2). The invention proposes a building cylinder arrangement with which improved gas-tight sealing between the piston and the main body can be achieved even at high temperatures (for instance above 500 degrees).

Description

technical field [0001] The invention relates to a construction cylinder assembly for a machine for layer-by-layer production of three-dimensional objects by laser sintering or laser melting of powder-like materials, said construction cylinder assembly having a base body substantially in the form of a cylindrical shell and capable of being moved along the inner side of the base body The cylinder axis of the basic body moves the piston, wherein the piston has a substrate for the growth of the three-dimensional object on its upper side. Background technique [0002] A cylinder assembly of this construction is known from EP 2 732 890 A2. [0003] By fabricating three-dimensional objects layer by layer with the aid of laser sintering or laser melting (also known as "selective laser sintering", selective laser sintering, or "selective laser melting", selective laser melting), it is possible to manufacture objects that cannot be achieved using conventional technologies Geometry (t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/20B29C64/153B33Y10/00B33Y30/00B22F3/105
CPCB33Y10/00B33Y30/00B28B1/001B22F2203/11B22F2203/05B22F2999/00B22F10/00B22F12/30B22F12/49B22F10/28B22F12/17B22F12/20B22F12/50B22F12/90B22F10/32B29C64/245B29C64/295B29C64/214B29C64/268Y02P10/25B33Y40/00B29C64/153B29C64/205
Inventor M·皮格S·韦伯
Owner TRUMPF LASERSYST FOR SEMICON MFG
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