公开(公告)号：US12186955B2

公开(公告)日：2025-01-07

申请号：US17436477

申请日：2019-12-27

Applicant: Shibaura Machine Co., Ltd.

Inventor： Toshiharu Fujioka ,  Kazuma Hayase ,  Hiroshi Yokoyama ,  Makoto Tsuji ,  Saburo Noda

IPC: B29C45/67 ,  B29C45/53

Abstract: A run-around circuit makes a hydraulic fluid discharged from a rod-side chamber along with a forward movement of a piston in an injection cylinder flow into a head-side chamber. A servo valve is provided in the run-around circuit and is connected to a tank. In a first state, the servo valve permits flow from the rod-side chamber to the head-side chamber, while prohibits flow from the rod-side chamber to the tank. In a second state, the servo valve prohibits flow from the rod-side chamber to the head-side chamber, while permits flow from the rod-side chamber to the tank. The servo valve can control the flow rate of the hydraulic fluid discharged from the rod-side chamber in each of the first state and second state.

公开(公告)号：US11925975B2

公开(公告)日：2024-03-12

申请号：US17454390

申请日：2021-11-10

Applicant: SHIBAURA MACHINE CO., LTD.

Inventor： Makoto Tsuji ,  Yuto Hayashi ,  Saburo Noda

IPC: B22D17/10 ,  B22D17/14 ,  B22D17/20 ,  B22D17/28 ,  B22D17/30 ,  B22D17/32 ,  B22D39/00

CPC classification number: B22D17/10 ,  B22D17/145 ,  B22D17/2023 ,  B22D17/203 ,  B22D17/28 ,  B22D17/30 ,  B22D17/32 ,  B22D39/006

Abstract: A die casting machine of an embodiment includes: a holding furnace holding molten metal; a sleeve located outside the holding furnace and having a molten metal supply port passing through a mold; a plunger sliding through the sleeve and including a plunger rod and a plunger tip fixed to a tip of the plunger rod; a molten metal supply pipe pushed against the sleeve to cover the molten metal supply port and supplying the molten metal into the sleeve; and a pushing force variable mechanism reducing a pushing force for the sleeve in the molten metal supply pipe when the plunger is sliding.

公开(公告)号：US11904385B2

公开(公告)日：2024-02-20

申请号：US17454388

申请日：2021-11-10

Applicant: SHIBAURA MACHINE CO., LTD.

Inventor： Makoto Tsuji ,  Yuto Hayashi ,  Saburo Noda

IPC: B22D17/10 ,  B22D17/14 ,  B22D17/20 ,  B22D17/28 ,  B22D17/30 ,  B22D17/32 ,  B22D39/00

CPC classification number: B22D17/10 ,  B22D17/145 ,  B22D17/203 ,  B22D17/2023 ,  B22D17/28 ,  B22D17/30 ,  B22D17/32 ,  B22D39/006

Abstract: A die casting machine of an embodiment includes: a holding furnace holding molten metal; a sleeve located outside the holding furnace and having a molten metal supply port passing through a mold; a plunger sliding through the sleeve and including a plunger rod and a plunger tip fixed to a tip of the plunger rod; a molten metal supply pipe supplying the molten metal into the sleeve and attachable to and detachable from the molten metal supply port; and a moving mechanism detaching the molten metal supply pipe from the molten metal supply port when the plunger is sliding.

公开(公告)号：US11813668B2

公开(公告)日：2023-11-14

申请号：US17574153

申请日：2022-01-12

Applicant: SHIBAURA MACHINE CO., LTD.

Inventor： Makoto Tsuji ,  Yuto Hayashi ,  Saburo Noda

IPC: B22D17/32 ,  B22D17/20 ,  B29C45/53

CPC classification number: B22D17/32 ,  B22D17/203 ,  B29C45/53

Abstract: A die casting machine of an embodiment includes: a base; a fixed die plate fixed onto the base and holding a fixed die; a movable die plate provided on the base to be movable in a mold opening and closing direction and holding a movable die to face the fixed die; an injection device filling a molten metal into a cavity formed by the fixed die and the movable die and applying a first pressure to the molten metal; a first pressurizing device pressurizing the molten metal filled in the cavity in a region other than a product region of the cavity and applying a second pressure to the molten metal; and a control device controlling the first pressurizing device so that the second pressure becomes higher than the first pressure.

公开(公告)号：US11813667B2

公开(公告)日：2023-11-14

申请号：US17563121

申请日：2021-12-28

Applicant: SHIBAURA MACHINE CO., LTD.

Inventor： Makoto Tsuji ,  Toshiaki Toyoshima ,  Saburo Noda

IPC: B22D17/26 ,  B22D17/22

CPC classification number: B22D17/26 ,  B22D17/22

Abstract: A molding machine of an embodiment includes: a base; a fixed die plate holding a fixed die; a movable die plate provided on the base and closing direction and holding a movable die to face the fixed die; a toggle mechanism capable of clamping the fixed die and the movable die; a link housing provided on the base and allowing one end of a link of the toggle mechanism to be fixed thereto; a first motor driving the toggle mechanism; a second motor moving the movable die plate and the link housing; an extrusion plate allowing an extrusion pin to appear and disappear in the movable die; a guide bar fixed to any one of the link housing and the movable die plate, penetrating the extrusion plate, and slidably holding the extrusion plate; a positioning member positioning the extrusion plate; a tie bar; and an injection device.