Molding device
AssigneeToshihara Kanagata Kogyo Co., Ltd.
InventorsAkira Itoh, Kiyoshi Sawada
Life of this patent
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Abstract
A molding device includes a lower mold unit and an upper mold unit. A molding cavity is defined between the mold units. The lower mold unit has a storing chamber connected to the molding cavity. The upper mold unit has a damper chamber connected to the molding cavity. A pressurizing rod is inserted into the damper chamber. The pressurizing rod is actuated by a cylinder. When a pushing rod pushes molten metal in the storing chamber to the cavity, an excess amount of the molten metal enters the damper chamber. Therefore, the molding operation is reliably performed even if an excessive amount of molten metal is injected into the storing chamber. Further, the pressurizing rod pressurizes the excess amount of metal in the damper chamber.
Claims16
A molding device comprising:
- a lower mold unit having a first molding surface;
- an upper mold unit located above the lower mold unit and having a second molding surface, the lower and upper mold units being configured to approach and separate from each other, wherein, when the lower and upper mold units approach each other to be closed, a molding cavity is defined between the molding surfaces of the mold units;
- a storing chamber provided in the lower mold unit, the storing chamber being connected to the molding cavity, wherein molten material is stored in the storing chamber;
- a pushing mechanism that pushes out the molten material in the storing chamber to the molding cavity in a state where the molding cavity is defined between the lower and upper mold units, wherein the pushing mechanism, including a control means, is adapted to start pushing out the molten material onto the first molding surface of the lower mold unit before the lower and upper units are closed to define the molding cavity;
- a damper chamber provided in at least one of the lower and upper mold units, the damper chamber being configured to receive an excess amount of the molten material that cannot be accommodated in the molding cavity;
- and
- a pressurizing mechanism for pressurizing the excess amount of the molten material in the damper chamber.
A molding device comprising:
- a lower mold unit, wherein the lower mold unit includes a horizontal support plate, a lower mold-holding member that is supported on the horizontal support plate to reciprocate in a vertical direction, a lower mold that is held by the lower mold-holding member, and a support rod that lifts the lower mold-holding member and maintains the lower mold-holding member at a predetermined height position from the horizontal support plate;
- an upper mold unit arranged above the lower mold unit, the lower and upper mold units being configured to approach and separate from each other, and wherein, when the lower mold unit and the upper mold unit approach each other to be closed, a molding cavity is defined between the lower mold unit and the upper mold unit;
- a storing chamber provided in the lower mold unit, the storing chamber being connected to the molding cavity, wherein molten material is stored in the storing chamber;
- a pushing mechanism arranged in the lower mold unit for pushing out the molten material in the storing chamber to the molding cavity in a state where the molding cavity is defined between the lower and upper mold units, wherein the pushing mechanism includes a pushing rod that is arranged upward from the horizontal support plate, the pushing rod having an end surface that forms a bottom of the storing chamber, wherein the pushing rod is inserted into the storing chamber to push out the molten material in the storing chamber to the molding cavity as the lower mold-holding member is pushed down toward the horizontal support plate by the upper mold unit, and wherein the pushing mechanism, including a control means, is adapted to start pushing out the molten material onto the first molding surface of the lower mold unit before the lower and upper units are closed to define the molding cavity;
- a damper chamber provided in at least one of the lower and upper mold units, the damper chamber being configured to receive an excess amount of the molten material that cannot be accommodated in the molding cavity;
- and
- a pressurizing mechanism for pressurizing the excess amount of the molten material in the damper chamber.
Dependencies are inferred from the claim text.