Injection molding nozzle for plastic with at least two outlet openings
First Claim
Patent Images
1. Injection molding nozzle (1) for plastic comprising:
- at least one pair of outlet openings (2) disposed opposite one another relative to a center axis in an end region of the injection molding nozzle directed toward different sides of the nozzle (1), for discharging to different sprue openings, each of the outlet openings (2) including a needle closure with a closure needle (5) adjustable in a direction of one of the outlet openings (2);
a common drive element for displacing the closure needles (5) in a closing direction, the drive element being a displacement member movable between rear ends of the closure needles (5), and the drive element including a cross section that is at least one of a cone (9), conical, tapered, a cam disk and an eccentric disk (10); and
a feed channel (4) for transporting plastic to the outlet openings (2), the feed channel closeable by the drive element when displacing the closure needles.
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Abstract
An injection molding nozzle (1) for plastic with at least two outlet openings (2) facing toward different sides and directed oppositely is not constructed as an open injection molding nozzle but has a respective closure needle (5) in the outlet openings (2), and a drive is also provided for displacing the closure needles (5) at least into the closing position. Thus a cold plug at the end of the outlet openings (2) facing a mold (3) can be avoided, independently of whether the closure needles completely close these outlet openings (2) at their mouth (6) or still leave a minimum gap.
14 Citations
21 Claims
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1. Injection molding nozzle (1) for plastic comprising:
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at least one pair of outlet openings (2) disposed opposite one another relative to a center axis in an end region of the injection molding nozzle directed toward different sides of the nozzle (1), for discharging to different sprue openings, each of the outlet openings (2) including a needle closure with a closure needle (5) adjustable in a direction of one of the outlet openings (2); a common drive element for displacing the closure needles (5) in a closing direction, the drive element being a displacement member movable between rear ends of the closure needles (5), and the drive element including a cross section that is at least one of a cone (9), conical, tapered, a cam disk and an eccentric disk (10); and a feed channel (4) for transporting plastic to the outlet openings (2), the feed channel closeable by the drive element when displacing the closure needles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Injection molding nozzle (1) for plastic comprising:
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first and second openings (2) in an end region of the injection molding nozzle directed radially outwardly opposite one another from a center axis of the nozzle and toward opposite sides of the nozzle (1) for discharging to different sprue openings; first and second closure needles (5), the first closure needle positioned in the first opening and the second closure needle positioned in the second opening; a common drive element for displacing the first and second closure needles (5) in a closing direction, the drive element being a displacement member movable between ends of the closure needles (5) and slideably connected to an end of each of the first and second closure needles; and a feed channel (4) for transporting plastic to the outlet openings (2) the feed channel closable by the drive element when displacing the closure needles. - View Dependent Claims (19, 20)
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21. Injection molding nozzle (1) for plastic comprising:
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first and second openings (2) in an end region of the injection molding nozzle, for discharging to different sprue openings disposed opposite one another relative a center axis; first and second closure needles (5), the first closure needle positioned in the first opening and the second closure needle positioned in the second opening; a common drive element for displacing the first and second closure needles (5) in a closing direction, the drive element being a displacement member movable between ends of the closure needles (5) and slideably connected to each of the first and second closure needles; and a feed channel (4) for transporting plastic to the outlet openings (2) the feed channel closeable by the drive element when displacing the closure needles.
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Specification