IPC分类号：
B29C64/118 | B29C64/321 | D01D5/24 | D01D5/34 | B33Y70/00 | B33Y30/00
当前申请(专利权)人：
SIGNIFY HOLDING B.V.
原始申请(专利权)人：
SIGNIFY HOLDING B.V.
当前申请(专利权)人地址：
High Tech Campus 48,5656 AE Eindhoven,NL
发明人：
VAN BOMMEL, TIES | HIKMET, RIFAT, ATA, MUSTAFA
代理机构：
VERWEIJ, PETRONELLA DANIËLLE
摘要：
The invention provides a method comprising producing a 3D item (1) by means of fused deposition modelling using a fused deposition modeling 3D printer (500), the method comprising a 3D printing stage comprising layer-wise depositing core-shell-shell material (1201) via a printer nozzle (502) on a receiver item (550), wherein the core-shell- shell material (1201) comprises a hollow tube (1210) comprising a hollow core (1220) and a first shell (1230) enclosing the hollow core (1220), and 3D printable material (201) at least partly enclosing the first shell (1230), to provide the 3D item (1) comprising a core-shell- shell layer (1322), wherein the core-shell-shell layer (1322) comprises the hollow tube (1210) comprising the hollow core (1220) and the first shell (1230) enclosing the hollow core (1220), and 3D printed material (202) at least partly enclosing the first shell (1230).
技术问题语段：
The patent text describes a method for producing 3D items using fused deposition modelling (FDM) 3D printers. The method involves printing a hollow tube with a first shell and a second shell using a core-shell material, which is a combination of a hollow tube and a first shell enclosing the hollow core. The method aims to reduce the amount of material used and the weight of the printed objects while maintaining their structural integrity and smooth surface structure. The technical problem addressed by the patent is to provide a method for producing 3D items using FDM that reduces the amount of material used and the weight of the printed objects while maintaining their structural integrity and smooth surface structure.
技术功效语段：
The patent describes a method for producing 3D items using fused deposition modeling (FDM) printing technology. The method involves printing a hollow tube with a first shell and a hollow core, and then depositing material around the first shell to create a second shell. This results in a 3D item with a core-shell-shell layer that is lightweight and has a smooth surface. The method also involves exposing the item to a liquid to further enhance its properties. The invention aims to provide a method for producing 3D items that reduces the amount of material used and the weight of the printed objects, while maintaining their structural integrity and smooth surface structure.
权利要求：
26
CLAIMS:
1. A method for producing a 3D item (1) by means of fused deposition modelling using a fused deposition modeling 3D printer (500), the method comprising a 3D printing stage comprising layer-wise depositing core-shell-shell material (1201) via a printer nozzle (502) on a receiver item (550), wherein the core-shell-shell material (1201) comprises a hollow tube (1210) comprising a hollow core (1220) and a first shell (1230) enclosing the hollow core (1220), and 3D printable material (201) at least partly enclosing the first shell (1230), to provide the 3D item (1) comprising a core-shell -shell layer (1322), wherein the core-shell -shell layer (1322) comprises the hollow tube (1210) comprising the hollow core (1220) and the first shell (1230) enclosing the hollow core (1220), and 3D printed material (202) at least partly enclosing the first shell (1230), wherein the first shell (1230) comprises a first shell material (1235) having a first glass transition temperature Tgl, the 3D printable material (201) has a second glass transition temperature Tg2, and Tg2<Tgl, wherein the method comprises 3D printing the 3D printable material (201) with a printer nozzle temperature lower than the first glass transition temperature Tgl and higher than the second glass transition temperature Tg2, and wherein the method further comprises a cutting stage comprising temporarily heating the printer nozzle (502) to a temperature above the first glass transition temperature Tgl.
2. The method according to claim 1, wherein the printer nozzle (502) comprises a core-shell printer nozzle (502) comprising a core nozzle part (503) and a shell nozzle part (504), and wherein the method comprises: feeding the hollow tube (1210) via the core nozzle part (503) and feeding the 3D printable material (201) via the shell nozzle part (504).
3. The method according to any one of the preceding claims, wherein the fused deposition modeling 3D printer (500) comprises a printer head (501), wherein the printer head (501) comprises the printer nozzle (502), wherein the printer head (501) comprises a first material entrance (510) for the 3D printable material (201) and a second material
entrance (520) for the hollow tube (1210), wherein the first material entrance (510), the second material entrance (520) are in fluid contact with the printer nozzle (502).
4. The method according to any one of the preceding claims 2-3, applying a glidant (520) to the first shell (1230) of the hollow tube (1210).
5. The method according to any one of the preceding claims, using a filament (320) comprising the core-shell-shell material (1201), and wherein the method comprises layer-wise depositing the filament (320) via the printer nozzle (502).
6. The method according to any one of the preceding claims, wherein the first shell (1230) comprises first shell material (1235), wherein the first shell material (1235) is crosslinked.
7. The method according to any one of the preceding claims, further comprising a synchronizing stage comprising: rotating the hollow tube (1210) in a synchronized manner with a movement of the printer nozzle (502) in respect to the receiver item (550), wherein the 3D printing stage and synchronizing stage at least partly overlap in time.
8. The method according to any one of the preceding claims, wherein the hollow tube (1210) has a diameter d of 0.2mm<d<20mm, and wherein the hollow tube (1210) has a wall thickness t of 0.02mm<t<lmm.