An injection mold capable of planing and cutting gates in an inside thereof and a planing and cutting method are provided. The injection mold includes a blade fixed block arranged between a moving mold and a fixed mold. Blades arranged on the blade fixed block and configured for cutting off gate condensed-material. The mold includes ejectors for ejecting out the gate condensed material and the blade fixed block. Runners formed between the blade fixed block and the fixed mold. Cut holes for communicating runners and gates are formed in blades. Ejector holes for penetrating the ejectors are formed in portions of the blade fixed block which correspond to bottoms of runners. The blade fixed block moves relative to the moving mold in a mold opening direction. The moving mold is provided with a limiting mechanism for limiting the blade fixed block after injection molding parts are separated from a cavity.

The purpose of the present invention is to make it possible to shorten the time required for a burr removal step and make it difficult for the burrs to detach from a sheet member in a step for removing the burrs together with the sheet member. For removal, by making the burrs to adhere to a pliable sheet member such as paper or nonwoven fabric that has been incorporated beforehand in the molding die and stripping the sheet member from the molding die, the burrs are removed together with the sheet member. The present invention is characterized in that in order to make it difficult for the burrs to detach from the sheet member during the stripping, a radiused shape with an arc-shaped cross-section is formed by the molding die on the areas surrounding the sections where the burrs adhere to the sheet member.

Method and apparatus for injection moulding of plastic materials using at least one nozzle with an obturator including a stem having a through hole and displaceable transversely with respect to the nozzle between a closing position and an opening position wherein the through hole opens communication between the nozzle and the flow path towards the mould. When the obturator is arranged in the closing position following injection, the through hole remains in communication with the cavity of the mould and a residual core made of plastic material present in the through hole remains joined to a residual core made of plastic material in the flow path and it is removed together with it.

A separating system for separating or separating items formed in a cavity of an injection molding system to separate them from material in the mold's runner, has a clamp plate for anchoring the separator system. The clamp plate secures a separating plate that supports a first separating pin, either directly or via an actuator. The first separating pin includes a base, a body having a cross-sectional portion, a neck having a cross-sectional portion, and a wedge-shaped tip. The system includes a support plate that supports a cavity plate, where the cavity plate has a first cavity and a first gate that fluidly couples the first cavity to a first runner channel. The separating first separating pin can be articulated to separate a molded material at a boundary between the first gate and the first cavity.

A method of estimating a normal vector to an attachment mounted to an approach frame of an apparatus for taking out a molded product and a normal vector to a die mounted to a molding machine is provided. A normal vector to a take-out head is estimated through computation using a coordinate/depth determination section and a normal vector computation section on the basis of depth data or coordinate data on three mounting members. Three or more extending portions are specified from the image, the extending portions being each a part of a fixed die or a movable die or a part of a surrounding component and extending in a direction that coincides with the open direction for the dies. A normal vector to the die is estimated through computation on the basis of the depth data or coordinate data on the specified extending portions.

A system for forming injection molded articles includes a turret, a first mold unit, and a second mold unit. In an embodiment, the turret includes a plurality of core plates and each core plate includes a plurality of core pins. The first mold unit may be configured to form an inner injection molded layer, and the second mold unit may be configured to form an outer injection molded layer over the inner injection molded layer. In an embodiment, the first mold unit and the second mold unit are configured to mold at the same time, and to provide opposing clamping forces. Processes involving over-molded articles are also disclosed.

The purpose of the present invention is to make it possible to shorten the time required for a burr removal step and make it difficult for the burrs to detach from a sheet member in a step for removing the burrs together with the sheet member. For removal, by making the burrs to adhere to a pliable sheet member such as paper or nonwoven fabric that has been incorporated beforehand in the molding die and stripping the sheet member from the molding die, the burrs are removed together with the sheet member. The present invention is characterized in that in order to make it difficult for the burrs to detach from the sheet member during the stripping, a radiused shape with an arc-shaped cross-section is formed by the molding die on the areas surrounding the sections where the burrs adhere to the sheet member.

An injection mold capable of planing and cutting gates in an inside thereof and a planing and cutting method are provided. The injection mold includes a blade fixed block arranged between a moving mold and a fixed mold. Blades arranged on the blade fixed block and configured for cutting off gate condensed-material. The mold includes ejectors for ejecting out the gate condensed material and the blade fixed block. Runners formed between the blade fixed block and the fixed mold. Cut holes for communicating runners and gates are formed in blades. Ejector holes for penetrating the ejectors are formed in portions of the blade fixed block which correspond to bottoms of runners. The blade fixed block moves relative to the moving mold in a mold opening direction. The moving mold is provided with a limiting mechanism for limiting the blade fixed block after injection molding parts are separated from a cavity.

A method of forming a molded device, such as a stopper, requiring minimal post-molding processing includes providing a four-plate mold assembly (52) having top plate (54), a sprue/vent plate (56) including a core portion (62), a main plate (58) including a recess (66) defining a mold cavity (68) having a contoured surface (70), and a bottom plate (60), closing the mold assembly (52) such that the core portion (62) enters into the recess (66) in the main plate (58) to define a space (72) corresponding to the shape of the stopper (10, 110) to be molded. A polymeric material is introduced into the mold cavity (68) to form the stopper (10, 110). A barrier layer (14, 114) can be inserted between the main plate (58) and bottom plate and adhered to the molded device (10, 110). The plates are opened and the molded device is removed.

A system for forming injection molded articles includes a turret, a first mold unit, and a second mold unit. In an embodiment, the turret includes a plurality of core plates and each core plate includes a plurality of core pins. The first mold unit may be configured to form an inner injection molded layer, and the second mold unit may be configured to form an outer injection molded layer over the inner injection molded layer. In an embodiment, the first mold unit and the second mold unit are configured to mold at the same time, and to provide opposing clamping forces. Processes involving over-molded articles are also disclosed.