摘要:
A method of monitoring and controlling a sequential valve gate molding apparatus in an injection molding or other molding process is disclosed. The method includes creating a target strain profile, receiving a deviation limit, receiving a change in strain relating to a first valve gate from a first strain gauge, identifying whether a deviation exists from a first portion of the target strain profile based on the output from the first strain gauge, determining whether any existing deviation exceeds the deviation limit, and adjusting the position of a first valve gate pin in the first valve gate if it does. The method may further include control of subsequent valve gates. Multiple strain gauges may be used to control a single valve gate, and/or each strain gauge may control more than one valve gate.
摘要:
An improved actuator for a valve gate assembly is provided. The actuator includes a planetary assembly for converting rotation of an electrical motor into linear movement of a valve gate pin while also providing mechanical advantage to the motor against injection pressures from 15,000 psi to at least 25,000 psi. An internal cooling volume surrounds the motor for continuously cooling the motor with water, and an internal encoder converts an angular rotation within the actuator into an analog or digital signal for output to a controller.
摘要:
An apparatus for controlling the rate of flow of a fluid mold material comprising: a manifold, an actuator interconnected to a valve pin, a position sensor that senses position of the valve pin, a controller that controls movement of the actuator according to instructions that instruct the actuator to drive the valve pin upstream at one or more selected intermediate velocities in response to receipt by the controller of a signal from the position sensor that the valve pin is disposed in the one or more intermediate upstream gate open positions.
摘要:
An apparatus for controlling the rate of flow to a mold cavity including a controller instructing a valve system to drive an actuator and a valve pin and including instructions that instruct the valve system to drive an actuator and a valve pin and including instructions that instruct the valve system to move from a start position to one or more intermediate drive rate positions and subsequently from the one or more intermediate drive rate positions to a high drive rate position on receipt by the controller of a signal from a position sensor that is indicative of the valve pin having reached a second position.
摘要:
An injection molding apparatus of plastic material including a mold, a fixing plate of the mold, a distributor of the plastic material to be injected and a plurality of injectors connected to the distributor and each including a valve pin controlled by a respective rotary electric motor and a transmission. The fixing plate has a cavity facing the mold on a first face, within which the distributor is contained, and each electric motor with the relative transmission is housed, in a quickly insertable and removable manner, within a respective seat arranged on a second face of the fixing plate opposite to the first face, laterally with respect to the corresponding injector.
摘要:
Apparatus and methods for storage and transmission of recipe data (process parameters) for the molding of articles in an injection molding apparatus. A controller includes a flow control microcontroller (MCU) that receives recipe data from a recipe storage microcontroller (MCU) mounted to a mold of an injection molding machine, the recipe storage MCU storing the recipe data defining process parameters for the molding of articles in the mold. The flow control MCU executes instructions for controlling valve pin motions according to the recipe data. In one embodiment, a human operator interface is provided for transmitting data to and/or from at least one of the recipe storage and flow control MCU's, allowing the operator to monitor, modify and/or control the process parameters during a molding cycle and/or to create a modified or new recipe for subsequent storage on the recipe storage MCU.
摘要:
A mold-tool system (100), comprising: an actuation system (200), including: an electric motor (202) being configured to convert electrical energy to mechanical rotational energy; a torque-amplifying device (204) being coupled to the electric motor (202), and being configured to provide a speed-torque varying component of the mechanical rotational energy associated with the electric motor (202); and a conversion assembly (206) being coupled with the torque-amplifying device (204), the conversion assembly (206) being configured to convert rotational motion of the torque-amplifying device (204) to a linear motion.
摘要:
An injection molding system comprising an actuator, a mounting plate, a mold and a manifold mounted between the mounting plate and the mold, the mounting plate being removably coupled to the mold, a valve pin comprising a pin stem and a pin connector; the actuator housing being mounted on or within the mounting plate for radial movement upon decoupling of the actuator housing from the mounting plate.
摘要:
The present invention provides a thin container production method capable of forming a thin container having a thickness of about 0.7 mm by injecting a molten resin of a polylactic acid into a narrow cavity. The production method according to the present invention produces a thin container W having a thickness in a range of 0.3 to 0.7 mm by injection molding of a polylactic acid resin. The molten resin of the polylactic acid impregnated with supercritical carbon dioxide in a range of 0.5 to 2.5 percent by mass relative to the total amount is injected into a cavity 29 corresponding to the thin container W.
摘要:
A valve gate assembly for regulating a flow of molten material into a mold. The valve gate assembly includes a movable valve that can be positioned between a fully closed position and a fully open position. The valve gate assembly further includes an actuating system operatively cooperating with the valve to move the valve and infinitely position the valve between the fully closed position and the fully open position.