A material delivery device includes: a plasticization unit having a screw and configured to plasticize a material by rotation of the screw to produce a plasticized material; a flow path through which the plasticized material flows; a nozzle having a nozzle opening that communicates with the flow path and delivers the plasticized material to an outside; a cylinder coupled to the flow path; a rod inserted into the cylinder; and a first pressure detection unit configured to detect a pressure of the plasticized material in the flow path via the rod. In a longitudinal direction of the rod, the rod has a rod end surface facing the flow path and a transmission unit at an opposite side of the rod end surface, and transmits a force due to the pressure received at the rod end surface to the first pressure detection unit via the transmission unit.

In one aspect, a method of molding a multilayer article comprises causing a surface layer material injection unit to commence injecting a surface layer material into a mold cavity via a surface layer material channel. Then, an internal layer material injection unit commences injecting an internal layer material into the mold cavity an internal layer material channel. Then, during application of a hold pressure upon the surface layer material in the surface layer material channel and with the surface and internal layer material injection units in fluid communication with one another, a pullback stroke is effected at the internal layer material injection unit. After a delay interval, at least one physical parameter indicative of a post-pullback pressure of the internal layer material is detected, and an indicator of pullback effectiveness is generated based on the post-pullback pressure indicated by the at least one physical parameter relative to a threshold pressure.

A system for taking out a molded product that does not require an operator to determine the sucking operation start time for a vacuum sucker by himself/herself by trial and error is provided. A controller includes a time interval measuring section configured to measure a time interval judging from an output from a pressure detector. The time interval measuring section measures a stable time interval since the pressure in a pipe reaches a predetermined pressure until a sucking operation start pressure is detected judging from an output from the pressure detector. The sucking operation start pressure indicates that a suction nozzle starts operation to suck up a molded product hereby the predetermined pressure is maintained. A sucking operation start time determining section of the controller determines a sucking operation start time such that a stable time interval is longer than a bias time interval, concurrently with movement control for a moving mechanism.

An injection molding apparatus (10) comprising an actuator (940, 941, 942) comprised of a driver (940dr, 941dr, 942dr) receiving electrical energy or power from an electrical drive (940d, 941d, 942d), the electrical drive (940d, 941d, 942d) comprising an interface that receives and controllably distributes electrical energy or power in controllably varied amounts during the course of an injection cycle to the driver (940dr, 941dr, 942dr), the electrical drive (940d, 941d, 942d) being housed within or by an actuator housing (940h, 941h, 942h) or being mounted on or to the housing (940h, 941h, 942h), the housing (940h, 941h, 942h) and the electrical drive (940d, 941d, 942d) being mounted on, to or in close proximity to the heated manifold (40), a cooling device (940mc, 940mc1, 940mc2, 941mc, 942mc) disposed between the heated manifold (40) and the housing (940h, 941h, 942h) adapted to substantially isolate or insulate at least the electrical drive (940d, 941d, 942d) from substantial communication with heat emanating or emitted from the heated manifold (40).

An injection molding machine includes: a plunger provided inside a barrel and capable of moving forward and backward in an axial direction thereof and rotating about an axis thereof; a feed hole for feeding a molding material in liquid form into a front of the plunger; a packing provided on a backward side of the feed hole to prevent the molding material fed through the feed hole from flowing backward along the plunger; and a controller for controlling a retracting movement of the plunger based on pressure of the molding material fed from the feed hole to thereby perform metering. In this configuration, at least part of the feed hole is covered by a side surface of the plunger at least from start to end of the retracting movement.

A method of manufacturing an optical component having micro-structures is described. The method detects a crystallization temperature within a crystallization temperature interval for fully filling the molding material into a mold cavity to rapidly produce the optical element having a micro-structure with a large area.

Provided is an improved mold structure, including a first mold base, a second mold base and two controllers. The first mold base and the second mold base are operably aligned. When the first mold base and the second mold base are in an aligned state, a mold cavity is jointly framed. Two gas passages, a first mold core and a second mold core are provided. The first mold base is provided with a runner. Two ends thereof are respectively connected to a material tube and a mold cavity of a molding machine. The first and second mold cores are made of porous material. Vent pipelines thereof are connected to the respective gas passages. The two controllers are respectively connected to the gas passages, and control the gas in and out such that the pressure in different areas in the mold cavity reaches a predetermined value, thereby controlling the flow direction of the raw material in the mold cavity.

An artificial intelligence-based injection molding system in which molding conditions can be changed to manufacture fair-quality products when defective products are manufactured because of disturbances during the injection molding including an injection molding machine which performs injection molding by injecting a molding material into a mold; an injection state data acquisition unit for acquiring, during injection molding, current injection state data that includes the viscosity profile of the molding material injected into the mold and/or the injection pressure value thereof; a determination unit, which inputs the current injection state data into a molding quality maintenance model trained with predetermined target injection state data, so as to determine whether to maintain molding quality; and a molding condition setting unit for changing a preset molding condition so that the current injection state data follows the target injection state data, when the determination unit determines not to maintain the molding quality.

Systems and approaches for controlling an injection molding machine having a first configuration and a mold forming a mold cavity and being controlled according to an injection cycle include obtaining a pattern for a portion of an injection cycle of an injection molding machine having a second configuration and operating the injection molding machine having the first configuration to inject a molten material into the mold cavity. While operating the injection molding machine having the first configuration, the obtained pattern is used to control a portion of the injection cycle.

Systems and approaches for controlling an injection molding machine having a first configuration and a mold forming a mold cavity and being controlled according to an injection cycle include obtaining a pattern for a portion of an injection cycle of an injection molding machine having a second configuration and operating the injection molding machine having the first configuration to inject a molten material into the mold cavity. While operating the injection molding machine having the first configuration, the obtained pattern is used to control a portion of the injection cycle.