A molded resin component includes a first surface on which a convex portion is formed, and a second surface opposite to the first surface. The convex portion includes a molding mark formed by a valve pin of a manufacturing apparatus that manufactured the molded resin component. A shape of at least a portion of a leading-end surface of the valve pin is not transferred into the molding mark.

An injection molding apparatus (10) comprising: a heated manifold (16), one or more fluid driven actuators (210a, 210b) each interconnected to a corresponding valve pin (211a, 211b), a housing comprised of one or more metal plates (202a, 202b, 204a, 204b, 206) arranged to form a manifold chamber (208), each of the fluid driven actuators (210a, 210b) being mounted within or at least about one foot from within the manifold chamber (208), each fluid driven actuator being fluid drive interconnected to a proportional control valve (213a, 213b, 213c) that is mounted either within the manifold chamber (208) or having fluid flow ports (213p1, 213p2) that are interconnected within about one foot of corresponding fluid flow ports (210p1, 210p2) of a corresponding fluid driven actuator (210a, 210b).

An actuator system for an injection molding system includes a double acting pressurized fluid actuator having a piston drive movable in a cylinder space, a flow control valve for regulating a flow rate of pressurized fluid to and/or from the cylinder space, a flow sensor for detecting the flow rate of pressurized fluid to and/or from the cylinder space, and an electronic controller for controlling the flow control valve to regulate the flow rate of pressurized fluid to and/or from the cylinder space depending on the flow rate detected by the flow sensor.

An actuator system for an injection molding system includes a double acting pressurized fluid actuator having a piston drive movable in a cylinder space, a flow control valve for regulating a flow rate of pressurized fluid to and/or from the cylinder space, a flow sensor for detecting the flow rate of pressurized fluid to and/or from the cylinder space, and an electronic controller for controlling the flow control valve to regulate the flow rate of pressurized fluid to and/or from the cylinder space depending on the flow rate detected by the flow sensor.

A molded resin component includes a first surface on which a convex portion is formed, and a second surface opposite to the first surface. The convex portion includes a molding mark formed by a valve pin of a manufacturing apparatus that manufactured the molded resin component. A shape of at least a portion of a leading-end surface of the valve pin is not transferred into the molding mark.

Injection molding system comprising at least one first actuator-system (D1, D2, D3), the first actuator system comprising: at least one piston drive having at least two pressure line connectors (CP2, CP3) to drive a piston to open or close a molding nozzle, pressure lines (L1, L2) connectable to a changeover valve (V) having a pressure line connector (P) and tank line connector (T) and at least two changeover pressure line connectors, wherein the first changeover valve pressure line connector (CV1) is connectable to a first pressure line (L1) and the second changeover valve pressure line connector (CV2) is connectable to a second pressure line (L2), wherein the second pressure line (L2) is connected to the second pressure line connector (CP2) of the piston drive, an electronically adjustable flow control valve having a first pressure line connector and a second pressure line connector, wherein the first pressure line connector of the adjustable flow control valve being connected to the first pressure line (L1) to allow a connection to the first pressure line connector (CV1) of the changeover valve (V), and the second pressure line connector is connected to a third pressure line (L3) which establishes a connection to the second pressure line connector (CP3) of the piston drive, at least one electronic flow sensor for (P1, P2, P3) sensing flow rate in the first, second and/or third pressure lines (L1, L2, L3), a controller connected to the adjustable flow control valve and to the at least one sensor, configured to electronically adjust the flow control valve, depending on information of the at least one sensor, controlling thereby the timing and the speed of the movement of the piston and the molding nozzle.

The present invention concerns an adaptor plate for connecting a cover plate to a plurality of piston housings of an injection molding machine, wherein the adaptor plate has a first fluid passage and a second fluid passage for feeding a first and a second control fluid into the piston housings, wherein the first fluid passage has at least one first fluid passage inlet for receiving the first control fluid and a plurality of first fluid passage outlets for discharge of the first control fluid to the piston housings and the second fluid passage has at least one second fluid passage inlet for receiving the second control fluid and a plurality of second fluid passage outlets for discharge of the second control fluid to the piston housings.

The present invention concerns an adaptor plate for connecting a cover plate to a plurality of piston housings of an injection molding machine, wherein the adaptor plate has a first fluid passage and a second fluid passage for feeding a first and a second control fluid into the piston housings, wherein the first fluid passage has at least one first fluid passage inlet for receiving the first control fluid and a plurality of first fluid passage outlets for discharge of the first control fluid to the piston housings and the second fluid passage has at least one second fluid passage inlet for receiving the second control fluid and a plurality of second fluid passage outlets for discharge of the second control fluid to the piston housings.

An injection molding apparatus comprising: a pneumatically driven actuator, the piston forming first and second drive chambers, a source of pressurized gas that generates gas flow to the drive chambers, a gas metering mechanism, a controller including programmable instructions that: automatically controllably positions the gas metering mechanism such that the piston or valve pin is disposed or held in one or more selected intermediate positions for a selected period of time during the course of an injection cycle where the tip end of the valve pin restricts flow of injection fluid through the gate to the mold cavity.

An injection molding apparatus comprising: a pneumatically driven actuator having a piston mounted within a fluid sealed chamber for slidable axial movement along or against an interior surface of the fluid sealed chamber via a non-elastomeric engagement or with a non-elastomeric material disposed between the piston and the interior surface of the fluid sealed chamber, the piston forming first and second drive chambers within the fluid sealed chamber, each drive chamber having respective fluid flow ports, a source of pressurized gas that generates gas flow at a selected maximum pressure or flow rate, a gas metering mechanism, a controller interconnected to the gas metering mechanism, the controller controllably moving the gas metering mechanism to selectable positions that correspond to reduced pressures or reduced flow rates during the course of pin travel from the fully downstream gate closed position to the fully upstream gate open position.