Fluid injecting nozzle having spaced projections

A nozzle for transporting molten material to a cavity in a mold through an opening in the mold, including,

• a nozzle body,
• a runner in the nozzle body,
• there being a passage in the nozzle body in communication with the runner,
• there being an orifice in the nozzle body in communication with the passage,
• means disposed on the nozzle body for introducing heat into the nozzle body,
• means disposed in the nozzle body for directing to the passage the heat introduced into the nozzle body, and
• heat insulating means disposed on the nozzle body and including a gate well in communication with the orifice in the nozzle body for passing the molten material from the orifice in the nozzle body to the opening in the mold, the heat insulating means being constructed and disposed relative to the mold for providing a communication of the molten material between the nozzle body and the mold substantially only through the gate well in the heat insulating means and the opening in the mold to provide for a shearing of the article in the mold from the nozzle body, after solidification of the molten material, at substantially only the gate well in the heat insulating means,
• the heat insulating means being provided with a pair of spaced projections disposed on opposite sides of the opening in the mold and contiguous to, but separated from, the mold when cold and expansible into abutting relationship with the mold when heated.

A nozzle for transporting molten material to a cavity in a mold through an opening in the mold, including,

• a nozzle body,
• a runner in the nozzle body,
• there being a passage in the nozzle body in communication with the runner,
• there being in the nozzle body an orifice in communication with the passage,
• means disposed on the nozzle body for introducing heat into the nozzle body,
• means disposed in the nozzle body for directing to the passage the heat introduced into the nozzle body,
• heat insulating means disposed on the nozzle body and including a gate well in communication with the orifice in the nozzle body for passing the fluid from the nozzle body to the gate well in the mold, the heat insulating means being constructed and disposed relative to the mold for providing a communication of the fluid between the nozzle body and the mold of the fluid after solidification substantially only through the gate well in the heat insulating means and the orifice in the mold to provide for a shearing of the article in the mold from the nozzle body at substantially only the gate well in the heat insulating means, and
• means extending between the heat insulating means and the nozzle body for aligning the nozzle body and the heat insulating means to provide for the communication between the orifice in the nozzle body and the gate well in the cap.

A nozzle for transporting molten material to a cavity in a mold through an opening in the mold, including,

• a nozzle body,
• a runner in the nozzle body,
• there being a passage in the nozzle body in communication with the runner,
• there being in the nozzle body an orifice in communication with the passage,
• heating means disposed on the nozzle body for introducing heat into the nozzle body, and
• heat insulating means disposed on the nozzle body and including a gate well in communication with the orifice in the nozzle body for passing the molten material from the nozzle body to the opening in the mold, the heat insulating means having a periphery with a first portion displaced from the mold for preventing the molten material from leaking along the periphery of the heat insulating means during the transfer of the molten material from the orifice in the heat insulating means to the opening in the mold and having second portions disposed on opposite sides of the first portion and separated from the mold when cold and expansible into abutting relationship with the mold when heated.

A nozzle for transporting molten material to a cavity in a mold through an opening in the mold, including,

• a nozzle body,
• there being a runner in the nozzle body,
• means for applying heat to the nozzle body,
• there being an orifice in the nozzle body in communication with the runner in the nozzle body and in communication with the opening in the mold,
• a plug extending through the nozzle body to heat the molten material in the runner, the plug being made from a heat conductive material, and
• a cap made from a heat insulating material, the cap being disposed on the nozzle body at the end opposite the runner and being provided with a gate well in communication with the orifice, the gate well being disposed in the cap to inject into the opening in the mold the molten material flowing through the gate well,
• the cap being provided with spaced portions contiguous to, but separated from, the mold when cold and expansible into abutting relationship with the mold when heated.

A nozzle for transporting molten material to a cavity in a mold through an opening in the mold, including,

• a nozzle body,
• there being a runner in the nozzle body,
• means for applying heat to the nozzle body,
• there being an orifice in the nozzle body in communication with the runner in the nozzle body,
• a plug extending through the nozzle body to heat the fluid in the runner, the plug being made from a heat conductive material, and
• a cap made from a heat insulating material, the cap being disposed on the nozzle body at the end opposite the runner and being provided with a gate well in communication with the orifice, the gate well being disposed in the cap to inject into the mold the fluid flowing through the orifice,
• the cap being formed and being disposed relative to the mold to prevent fluid passing through the gate well from leaking along the periphery of the cap past positions on the cap around the gate well and to provide for a shearing of the article in the mold, after hardening of the molten fluid, only at the position of the gate well,
• the cap being formed to dispose first portions of the cap around the gate well in contiguous, but spaced, relationship with the mold before the heating of the molten material in the passage and in abutting relationship with the mold after heating of the cap and to provide second portions of the cap with a heat insulating relationship between the cap and the mold, the second portions of the cap being displaced from the mold in a second direction transverse to the first direction.

A nozzle for transporting molten material to a cavity in a mold through an opening in the mold, including,

• a nozzle body,
• there being a runner in the nozzle body,
• means for applying heat to the nozzle body,
• there being an orifice in the nozzle body in communication with the runner in the nozzle body,
• a plug extending through the nozzle body to heat the fluid in the runner, the plug being made from a heat conductive material,
• a cap made from a heat insulating material, the cap being disposed on the nozzle body at the end opposite the runner and being provided with a gate well in communication with the orifice, the gate well being disposed in the cap to inject into the mold the fluid flowing through the orifice,
• the cap being formed and being disposed relative to the mold to prevent fluid passing through the gate well from leaking along the periphery of the cap past positions on the cap around the gate well and to provide for a shearing of the article in the mold, after hardening of the molten fluid, only at the position of the gate well,
• positioning means extending through the cap into the nozzle body for positioning the cap on the nozzle body with the gate well in alignment with the passage, and
• means extending through the cap into the nozzle body for removably holding the cap in fixed relationship to the nozzle body in alignment between the gate well and the nozzle body.