公开(公告)号：US20160001460A1

公开(公告)日：2016-01-07

申请号：US14851515

申请日：2015-09-11

Applicant: NGK Insulators, Ltd.

Inventor： Yuichi TAJIMA ,  Ryuji YAMAGUTI

IPC: B28B3/26 ,  B28B3/22

CPC classification number: B28B3/269 ,  B28B3/22 ,  B28B3/224 ,  B28B2003/203 ,  B29C47/0004 ,  B29C47/0028 ,  B29C47/124 ,  B29C47/40 ,  B29C47/92 ,  B29C2947/92609

Abstract: An extrusion forming apparatus includes an extruding section, a chamber drum, and a forming section. The extruding section kneads a material including a ceramic raw material and extrudes a kneaded material. The chamber drum has a first space portion having a first extruding direction extending portion through which the kneaded material is allowed to flow in an extruding direction, and a second space portion which has a second extruding direction extending portion extending in the extruding direction and a direction changing portion bending from the extruding direction to a downward direction, to allow the kneaded material to flow in the downward direction changed from the extruding direction. The second space portion has a cross section obtained by isotropically decreasing a cross section of the first space portion perpendicular to a flow-through direction of the kneaded material. The forming section has a die to extrude a ceramic formed body.

Abstract translation: 挤出成形装置包括挤出部，室鼓和成形部。 挤出部揉合包含陶瓷原料的材料并挤出捏合材料。 室鼓具有第一空间部分，其具有第一挤出方向延伸部分，使捏合材料沿着挤出方向流动，第二空间部分具有沿挤出方向延伸的第二挤出方向延伸部分和方向 改变部分从挤出方向弯曲到向下的方向，以使得捏合材料沿向下的方向流动，从挤出方向改变。 第二空间部分具有通过各向同性地减小垂直于捏合材料的流通方向的第一空间部分的横截面而获得的横截面。 成型部具有挤出陶瓷成形体的模具。

公开(公告)号：US20180354863A1

公开(公告)日：2018-12-13

申请号：US16106215

申请日：2018-08-21

Applicant: NGK INSULATORS, LTD.

Inventor： Yuichi TAJIMA ,  Ryuji YAMAGUTI

IPC: C04B38/10 ,  B28B3/20 ,  C04B38/00

CPC classification number: C04B38/103 ,  B28B3/20 ,  C04B38/0006

Abstract: A manufacturing method of a ceramic formed body, including: a mixing step in which a raw material for forming a ceramic formed body is dryly mixed, and then, a liquid is added to the obtained dry mixture to wetly mix the mixture; a kneading step in which a mixture obtained in the mixing step is kneaded; an injection step in which supercritical carbon dioxide in the state of supercritical fluid is injected into a kneaded product obtained in the kneading step; and a forming step in which a forming raw material containing the supercritical carbon dioxide obtained in the kneading step and the injection step is extruded to form the ceramic formed body.