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US 7,458,804 B2Granted
Injection molding drop tip
AssigneePlastic Engineering & Technical Services, Inc.
InventorPatrick A. Tooman
Life of this patent
Estimating the term…
Abstract
A drop tip is provided for conveying injection molding material from a molding material supply into a mold. The drop tip has a body including an internal bore and a drop passage extending from the internal bore. The internal bore has an arcuate lower end terminating in a gate to prevent retention of molten material therein.
Claims19
An injection molding drop tip for conveying injection molding material from a molding material supply into a mold, said drop tip comprising:
- a body including an internal bore and a single tapered drop passage extending axially from said internal bore;
- said internal bore having an upper end and extending axially to a lower end terminating in a single gate to prevent retention of molten material therein, said internal bore having an axial length less than an axial length of said drop passage;
- and
- wherein said body has a wall forming said internal bore and extending axially from said upper end to said lower end, said wall having a continuous arcuate internal surface extending from said upper end of said internal bore to said lower end of said internal bore to prevent retention of molten material in said internal bore when molten material flows through said gate by causing any residue from the molten material to flow upward away from said gate.
1 more element
A manifold assembly for conveying injection molding material from a molding material supply into a mold, said manifold assembly comprising:
- a manifold including a manifold flow passage extending therealong;
- at least one nozzle extending outwardly from said manifold to a distal end, said at least one nozzle including a nozzle flow passage extending from and in fluid communication with said manifold flow passage;
- and
- at least one drop tip including a body having a threaded portion threadably engaging said distal end of said at least one nozzle and an internal bore in fluid communication with said nozzle flow passage, said internal bore having an upper end and extending axially to a lower end terminating in a single gate to prevent retention of molten material therein;
- and
- wherein said internal bore has an a continuous arcuate internal surface extending from said upper end of said internal bore to said lower end of said internal bore to prevent retention of molten material in said internal bore when molten material flows through said gate by causing any residue from the molten material to flow upward away from said gate.
3 more elements
An injection molding drop tip comprising:
- a body including a threaded portion for threadably engaging a lower end of a nozzle and an internal bore extending axially therein for communicating with a flow passage of a nozzle and a single drop passage extending axially from said internal bore to an outlet thereof and being tapered from said internal bore to the outlet, said internal bore having an axial length less than an axial length of said drop passage;
- and
- said internal bore being of a first predetermined diameter and having an upper end and extending axially to a lower end terminating in a single gate of a second predetermined diameter less than said first predetermined diameter to prevent retention of molten material therein;
- wherein said body has a wall forming said internal bore and extending axially from said upper end to said lower end, said wall having a continuous arcuate internal surface extending from said upper end of said internal bore to said lower end of said internal bore to prevent retention of molten material in said internal bore when molten material flows through said gate by causing any residue from the molten material to flow upward away from said gate;
- and
- a tool engaging portion disposed axially between said threaded portion and an outlet of said drop passage.
3 more elements
Dependencies are inferred from the claim text.