公开(公告)号：US11904542B2

公开(公告)日：2024-02-20

申请号：US17112534

申请日：2020-12-04

Applicant: Stratasys, Inc.

Inventor： Jeff Lee Chapman ,  Robert Skubic ,  Bryan Migliori ,  Benjamin L Braton ,  Patrick W. Anderson ,  Josh Durand ,  Colin Schiel

IPC: B29C64/245 ,  B29C64/232 ,  B33Y30/00 ,  B29C64/118

CPC classification number: B29C64/245 ,  B29C64/118 ,  B29C64/232 ,  B33Y30/00

Abstract: A platen assembly for use with an extrusion-based 3D printer includes a grid assembly comprising at least a 4×2 framework of interlocked perpendicular x direction beams and y direction beams, providing a substantially planar upper surface and a bottom surface. The platen assembly includes a platen comprising a thin metal sheet supported on the upper surface of the grid assembly and secured to the grid assembly such that the top surface provides a substantially flat build surface. The x direction beams, the y direction beams and the platen are constructed of substantially a same thermal expansion properties, and wherein the build surface of the platen has a build surface area of at least 400 square inches and maintains its flatness to within a flatness tolerance of 0.020 inches over a temperature range of at least 20 C-300 C.