Injection moulding device comprising valve pin position indicator
AssigneeSynventive Molding Solutions, Inc.
InventorsPeter Sattler, Udo Liebram
Life of this patent
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Abstract
An injection molding device (1) including an actuating cylinder (15) with a piston (33). A valve pin (11) is actuated by the cylinder (15), the piston including a fluid passage (55) via which pressure medium can pass when the piston is in a position between its upper and its lower end position, and which is at least partly closed off when the piston is in its lower and/or its upper end position. Hereby relatively simple position indicator of the valve pin (11) is formed.
Claims4
Injection moulding device (1) comprising a mould body (2,5) having a cavity (4), an elongated nozzle (3) seated in the cavity, a valve pin (11) coaxially in the nozzle and actuating means (15) connected to the valve pin for axially displacing the valve pin in the nozzle, the actuating means comprising a cylinder housing (30) having a first pressure medium inlet (38) connected to a pressure medium duct (57) and a second pressure medium inlet (39) connected to a pressure medium duct (56), and a piston (33) reciprocatable in the cylinder housing (30) between an upper end position and a lower end position, the piston (33) being coupled to the valve pin (11), a flow detection means (58,59) in at least one of the pressure medium ducts (56,57), for forming a displacement signal wherein the piston comprises a fluid passage (55) via which pressure medium can pass when the piston is in a position between its upper and its lower end position, and which is at least partly closed off when the piston is in its lower and/or its upper end position.
Injection moulding device (1) comprising a mould body (2,5) having a cavity (4), an elongated nozzle (3) seated in the cavity, a valve pin (11) coaxially in the nozzle and actuating means (15) connected to the valve pin for axially displacing the valve pin in the nozzle, the actuating means comprising a cylinder housing (30) having a first pressure medium inlet (38) connected to a pressure medium duct (57) and a second pressure medium inlet (39) connected to a pressure medium duct (56), and a piston (33) reciprocatable in the cylinder housing (30) between an upper end position and a lower end position, the piston (33) being coupled to the valve pin (11),
- wherein the piston comprises a fluid passage (55) via which pressure medium can pass when the piston is in a position between its upper and its lower end position, and which is at least partly closed off when the piston is in its lower and/or its upper end position, and
- wherein a flow detection means (58,59) and a signal processing and/or display means (62) connected to the flow detection means are located at a distance from the mould body.
Dependencies are inferred from the claim text.