Shoe mold with blowing arrangement for injection foam molding
OwnerHsieh Chi-Jininventor
Life of this patent
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Abstract
A mold for making a shoe body in a process of injection foam molding is disclosed and includes a base; a lower mold body on the base; an upper die together with the mold body to form a mold cavity; an opening mechanism; a cover on the die and secured by the opening mechanism; a cooling plate under the mold body; and a platen pressed onto the cover. Pressurized gas is supplied from a first source to the cavity, molten materials from a second source are forced into the cavity to mix with the pressurized gas, after feeding a predetermined amount of the molten materials to the cavity, the first and the second sources are deactivated for releasing the pressurized gas, and the molten materials expand to shape and produce the finished shoe body.
Claims6
A mold for making a shoe body in a process of injection foam molding, comprising:
- a base including an upright projection;
- an upper seat including an upper die and a cover secured to the upper die, wherein the cover includes a first runner, a second runner being in communication with the first runner, and a first outlet vent open to a top, and wherein the upper die includes a top passage net, a plurality of parallel gas channels through the upper die and being in communication with the passage net, a third runner aligned with and being in communication with the second runner and the passage net, a bottom protrusion having a predetermined pattern, two opposite first edge members proximate front and rear ends of the protrusion, and two opposite second edge members at the front and rear ends of the protrusion and adjacent the first edge members;
- a lower bed including a lower mold body and a cooling plate secured to the lower mold body, wherein the lower mold body including a top recess shaped to conform to the sole of a shoe, a closed flange around the recess and including a plurality of tunnels, a closed groove around the flange and spaced from the recess, the groove being in communication with the flange through the tunnels, a bottom space, a plurality of connection tubes being in communication with the space and the groove, and a lateral first outlet vent extending from the groove and open to a side of the lower mold body;
- an opening mechanism including an engagement plate having two side arms, and a forward yoke secured to a top of the upper die, wherein the forward yoke has a joining portion adjustably secured to the engagement plate, and wherein the engagement plate is pivotably secured to the projection;
- and
- a hydraulic cylinder pivotably fastened between two rear ends of the arms and including an extendable plunger rod pivotably secured to the base, wherein the cylinder is adapted to activate to either retract the plunger rod a first predetermined distance for opening the mold or extending the plunger rod the first predetermined distance for closing the mold.
Dependencies are inferred from the claim text.