公开(公告)号：US20190024226A1

公开(公告)日：2019-01-24

申请号：US16070699

申请日：2016-01-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Bin Hu ,  Pan Wang ,  Yiwu Xu

IPC: C23C8/24 ,  C23C14/06 ,  B22D17/22 ,  C21D9/00

Abstract: A method of manufacturing a pin (46) for a o mold (28) includes forming the pin (46) to include a substantially uniform initial hardness throughout the entire structure of the formed pin (46). The formed pin (46) is then processed with a hardening process, such that the processed pin(46) exhibits a hardness defining a hardness gradient that gradually increases from the initial hardness at a central interior region (56) of the pin (46) to an increased surface hardness at an exterior surface (60) of the pin (46). After processing the pin (46) with the hardening process, a coating (64) maybe deposited onto the exterior surface (60) of the pin (46) with a physical vapor deposition process. The coating (64) exhibits a hardness that is greater than the hardness of the increased surface hardness of the exterior surface (60) of the pin (46). The pin (46) may include, for example, a core pin, a squeeze pin, or an ejector pin.

公开(公告)号：US20250079956A1

公开(公告)日：2025-03-06

申请号：US18467159

申请日：2023-09-14

Applicant: GM Global Technology Operations LLC

Inventor： Yiwu Xu ,  Hongyi Zhan ,  Wenying Yang ,  Qigui Wang

IPC: H02K15/14 ,  B22D17/08 ,  B22D17/20 ,  B22D17/28 ,  B22D17/30 ,  H02K5/06

Abstract: A die cast part, such as an electric drive unit, a high pressure die casting system, and a method of forming a die cast part. The high pressure die casting system includes a shot sleeve including a pour hole, a launder connected to the pour hole, a furnace connected to the launder, a mold cavity connected to the shot sleeve by a sprue post, and a heating system including at least one proximal channel located under the pour hole under the shot sleeve. The feedstock is melted in the furnace and transferred by a launder into the preheated shot sleeve through a pour hole. The feedstock is injected into a mold cavity, wherein the temperature of the feedstock is above the solidus temperature of the feedstock upon entering the mold cavity.