公开(公告)号：US12251277B2

公开(公告)日：2025-03-18

申请号：US17592677

申请日：2022-02-04

Applicant: DENTSPLY SIRONA INC.

Inventor： Stefan Fecher ,  Lothar Völkl ,  Sven Giese ,  Tobias Rösch ,  Andreas Gebhardt

IPC: A61C13/00 ,  A61C13/20 ,  B28B3/02 ,  B28B3/08 ,  B30B11/02 ,  B30B15/02 ,  A61C13/09 ,  A61C13/225 ,  B22F3/03 ,  B28B11/24

Abstract: A method for forming a multi-layer blank of a ceramic material including the steps of: providing a mold that includes at least one side wall surrounding a lower press plunger to form a cavity therebetween, wherein the lower press plunger has a movable pin; filling into the mold a first ceramic material; extending the movable pin from an upper surface of the lower press plunger and into the cavity; pressing a first upper press plunger against the first ceramic material so that a first open cavity is formed while at least a portion of the first upper press plunger is in contact with the movable pin to maintain the through-hole through the first layer; filling into the mold a second ceramic material of a different composition; extending the movable pin from an upper surface of the first layer and into the first open cavity; and pressing a second upper press plunger against the second layer so that a second open cavity is formed in communication with the through-hole that extends through the first and second layers to form the blank.