Abstract

The invention relates to a method for producing 3D shaped articles, in which method: a suspension comprising metallic, ceramic or polymer particle material or cement-bound materials is applied as a suspension layer to a construction platform to produce a layer; the layer thus applied is at least partially dried; a binder is selectively applied; and the selectively applied binder is solidified; these steps being repeated until the desired 3D shaped article has been obtained; where necessary, the particle material which has not been solidified by means of the binder is removed; and the 3D shaped article is unpacked; wherein the suspension for producing a layer is applied by means of a sieve plate, which is positioned onto the last applied layer on the construction platform and through which the suspension is applied to the last particle material layer; and wherein the sieve plate is removed again before the selective application of the binder.

IPC Classes  ?

• B33Y 10/00 - Processes of additive manufacturing
• B22F 10/14 - Formation of a green body by jetting of binder onto a bed of metal powder
• B33Y 40/10 - Pre-treatment
• B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing
• B29C 64/165 - Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
• B29C 64/314 - Preparation
• B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor

Abstract

A screen provision system, for a printing device with a screen receptacle for a printing screen-and a squeegee device associated with the screen receptacle, has a conveying device for conveying a printing screen and at least one screen magazine with multiple screen storage portions that can each receive a printing screen. The screen provision system has at least one treatment station for treating the printing screens. The conveying device supplies printing screens to the screen magazine and to the at least one treatment station.

IPC Classes  ?

• B41F 15/08 - Machines
• B41F 15/36 - Screens; Frames; Holders therefor flat

Abstract

A screen unit for a printing device for printing three-dimensionally shaped structures, in particular on substrates, printed circuit boards, wafers, solar cells, carrier substrates, printing tables, carrier plates, sintering plates or the like, has a frame holding at least one printing screen and is designed to be accommodated in a screen receptacle of the printing device, to be filled with a printing compound and to be subjected to the action of a squeegee for carrying out a printing process. The screen unit has, in or on the frame, at least one holding device for the squeegee, which is in the form of an exchangeable squeegee.

IPC Classes  ?

• B41F 15/34 - Screens; Frames; Holders therefor
• B29C 64/209 - Heads; Nozzles
• B29C 64/364 - Conditioning of environment
• B41F 15/44 - Squeegees or doctors