A mold die includes: a mold die body that is configured to hold an object to be molded, the object including a substrate and a chip mounted in a central area of the substrate, and that has a cavity which is rectangular in a plan view and which is configured to receive a resin material, the mold die body including: a pot for containing the resin material; a gate disposed at one side of the cavity and configured to allow the resin material to flow into the cavity; and a flow-path restricting mechanism that is disposed on both lateral sides of the cavity that are perpendicular to the one side and that is configured to narrow lateral flow paths, the lateral flow paths being flow paths for the resin material flowing through the cavity in which the chip is not disposed.

A method of injection molding of plastic materials into a cavity of a mold with a molding apparatus including a distributor of the pressurized fluid plastic material connected to at least one injector having a pin valve displaceable between a fully closed position and an open position. The method includes a filling step following displacement of the pin valve from the fully closed position to the open position, a packing step of the pressurized plastic material keeping the pin valve in the open position, and a step of displacement and maintenance of the pin valve in at least one partially closed intermediate position prior to its complete closure.

Disclosed is an injection mold for manufacturing an injection-molded article to which a substrate is bound in-mold during injection, the substrate having an adhering surface for binding to the article and a leading edge at an upstream end of the substrate. The injection mold comprises a first mold component and a second mold component together defining a cavity into which a molten plastic material is injected to form the article. The injection mold includes a flow deflector disposed on at least one of the first and second mold components, wherein the flow deflector deflects a flow of the molten plastic material over the leading edge of the substrate such that the flow makes first contact with the substrate downstream of the leading edge, thereby forming a temporary air pocket at the leading edge of the substrate which is then back-filled by the subsequent flow of the molten plastic material.

A mold die includes: a mold die body that is configured to hold an object to be molded, the object including a substrate and a chip mounted in a central area of the substrate, and that has a cavity which is rectangular in a plan view and which is configured to receive a resin material, the mold die body including: a pot for containing the resin material; a gate disposed at one side of the cavity and configured to allow the resin material to flow into the cavity; and a flow-path restricting mechanism that is disposed on both lateral sides of the cavity that are perpendicular to the one side and that is configured to narrow lateral flow paths, the lateral flow paths being flow paths for the resin material flowing through the cavity in which the chip is not disposed.

An injection molding system including a nozzle member (18) or a valve pin (80) having a tip end (21) wherein the nozzle member (18) or valve pin (80) is adapted to be controllably rotatable around a longitudinal rotation axis (A) to enable an exit aperture (20) of the nozzle or the tip end of the pin to interface with a cavity entrance aperture (30) to controllably vary or adjust size (SP1, SP2) of the cross sectional area (CA) of a gate aperture (50) according to degree of rotation (R) of the nozzle or valve pin around the rotation axis (A).

Various examples provide a mold including a molding component and a supplementary component. The molding component may have a cavity, to enable a molten material to fill into the molding component to form an object. The supplementary component may include a bypass having a first opening located at a first position of the molding component and a second opening located at a second position of the molding component. The molten material may flow from the first position to the second position via the molding component, flow from the first opening to the second opening via the bypass and fill into the second position of the molding component through the second opening.

Disclosed herein are methods and systems for the preparation of a co-injection molded multilayer plastic article. Some methods include co-extruding a combined polymeric stream having an interior core stream encased by an inner stream and an outer stream. A volumetric ratio of the inner stream to outer stream is adjusted during injection of the combined stream into the a mold cavity to alter a streamline along which the interior core stream flows thereby forming cohesion member that structurally interlocks the interior layer with the inner layer, with the outer layer or with both. Some embodiments reduce or eliminate a need for addition of an adhesive in the composite stream to prevent delamination of layers of the resulting multilayer plastic article. In some embodiments, cohesion members may be employed to produce a desired cosmetic effect in a resulting article.

There is provided an injection molding machine including a material supply unit configured to supply a shaping material including plasticized thermoplastic resin, an injection unit including a manifold including a main flow path communicating with the material supply unit and a plurality of branch flow paths branching from the main flow path and a plurality of nozzles respectively coupled to the branch flow paths and configured to inject the shaping material to a die unit, a positioning unit configured to position the injection unit and the die unit, and a control unit configured to control operation of the material supply unit and the injection unit. The manifold includes a first member and a second member that are bodies separate from each other and can be assembled and separated, and the branch flow paths are formed in a boundary portion of the first member and the second member in an assembled state of the first member and the second member.