公开(公告)号：US20210370602A1

公开(公告)日：2021-12-02

申请号：US17051133

申请日：2018-10-01

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Emily Ann MIGINNIS ,  Jesiska TANDY ,  Erica FUNG ,  Yow Wei CHENG

IPC: B29C64/314 ,  B29C64/357 ,  B29C64/393 ,  G06T7/00 ,  G06T7/80 ,  B33Y10/00 ,  B33Y50/02

Abstract: According to an example, an apparatus may include a processor and a non-transitory computer readable medium on which is stored machine readable instructions that are to cause the processor to determine an optical property value of a first build material from an image of a sample of the first build material, calculate an age of the first build material from the determined optical property value of the first build material, and based on the calculated age of the first build material, calculate a ratio of a mixture of the first build material and a second build material that results in the mixture achieving a selected feature, the second build material having a different age than the first build material.

公开(公告)号：US20190054690A1

公开(公告)日：2019-02-21

申请号：US16074492

申请日：2016-12-08

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Yi FENG ,  Jesiska TANDY ,  Rachael DONOVAN

IPC: B29C64/165 ,  B29C64/20 ,  B29C64/314 ,  B33Y30/00 ,  B33Y70/00

Abstract: A material set can include a powder bed material, including a polymer powder and a fusing agent. The polymer powder can have a particle size distribution having the following profile: D10 of 30 μm or more, D50 from 50 μm to 65 μm, and D90 of 100 ? m or less. Other parameters can include a melting point from 100° C. to 300° C., a processing window temperature of 20° C. or more, an energy density absorption of 20% or less, and a melt flow index from 10 cc to 80 cc at 10 minutes. The fusing agent can include an energy absorber capable of absorbing electromagnetic radiation to produce heat.