Back to results
US 11,780,129 B2Granted
Molding method for operating molding device
AssigneeKing Steel Machinery Co., Ltd.
InventorsLiang-Hui Yeh, Ching-Hao Chen, Yi-Chung Lee
Life of this patent
Estimating the term…
Abstract
A molding method includes providing a molding device, wherein the molding device includes a first mold and a second mold corresponding to the first mold; moving the first mold towards the second mold to form a first mold cavity; supplying a gas to the first mold cavity; injecting a material into the first mold cavity; and moving the first mold away from the second mold to form a second mold cavity and discharge at least a portion of the gas out of the molding device, wherein a first volume of the first mold cavity is substantially less than a second volume of the second mold cavity.
Claims18
A molding method, comprising:
- providing a molding device, wherein the molding device includes a first mold, a second mold corresponding to the first mold, and a junction point disposed at a second inner sidewall of the second mold;
- moving the first mold towards the second mold to form a first mold cavity;
- supplying a gas to the first mold cavity via the junction point to increase a pressure inside the first mold cavity to a first pressure;
- after accomplishment of the supplying of the gas, injecting a material into the first mold cavity, wherein the pressure inside the first mold cavity further increases from the first pressure to a second pressure during the injection of the material into the first mold cavity, the pressure inside the first mold cavity is at the second pressure after accomplishment of the injecting of the material, the junction point is closed and the gas is not dischargeable out of the first mold cavity through the junction point during and after the injection of the material into the first mold cavity;
- and
- after accomplishment of the injecting of the material, moving the first mold away from the second mold to form a second mold cavity and a gap between the first mold and the second mold and to discharge at least a portion of the gas out of the second mold cavity via the gap, wherein the second mold cavity has a third pressure, the second pressure decreases to the third pressure during the movement of the first mold away from the second mold, and the pressure inside the second mold cavity is at the third pressure after accomplishment of the movement of the first mold away from the second mold, the junction point is closed and the gas is not dischargeable out of the second mold cavity through the junction point during the movement of the first mold away from the second mold, wherein the first mold cavity and the second mold cavity are communicable with the junction point, and a first volume of the first mold cavity is less than a second volume of the second mold cavity.
3 more elements
A molding method, comprising:
- providing a molding device, wherein the molding device includes a first mold, a second mold corresponding to the first mold, a junction point disposed at the molding device;
- moving the first mold towards the second mold to form a first mold cavity;
- injecting a gas to the first mold cavity via the junction point to increase a pressure inside the first mold cavity to a first pressure;
- after accomplishment of the supplying of the gas, injecting a material into the first mold cavity, wherein the pressure inside the first mold cavity further increases from the first pressure to a second pressure during the injection of the material into the first mold cavity, and the pressure inside the first mold cavity is at the second pressure after accomplishment of the injecting of the material, the junction point is closed and the gas is not dischargeable out of the first mold cavity through the junction point during and after the injection of the material into the first mold cavity;
- and
- after accomplishment of the injecting of the material, moving the first mold and the second mold away from each other to form a second mold cavity and a gap between the first mold and the second mold and to discharge at least a portion of the gas out of the second mold cavity via the gap, wherein the second mold cavity has a third pressure, the second pressure decreases to the third pressure during the movement of the first mold and the second mold away from each other, and the pressure inside the second mold cavity is at the third pressure after accomplishment of the movement of the first mold and the second mold away from each other, the junction point is closed and the gas is not dischargeable out of the second mold cavity through the junction point during the movement of the first mold and the second mold away from each other, wherein the first mold cavity and the second mold cavity are communicable with the junction point, and a first volume of the first mold cavity is less than a second volume of the second mold cavity.
3 more elements
Dependencies are inferred from the claim text.