An injection-moulding tool (2) for producing an in particular thin-walled plastics component, comprising: —at least two tool elements (1, 1′, 1″), wherein the at least two tool elements (1, 1′, 1″), in a closed position of the injection-moulding tool (2), are moved against one another at least in sections so as to form at least a subregion of a shape-imparting tool cavity (3) of the injection-moulding tool (2), wherein—the at least two tool elements (1, 1′, 1″) each have at least one shape-imparting contouring structure (4, 4′, 4″) which delimits the tool cavity (3) at least in sections, wherein—on at least one tool element (1, 1′, 1″), adjacent to the contouring structure (4, 4′, 4″), there is formed at least one ventilation structure (5) for ventilating the tool cavity (3) in the closed position of the injection-moulding tool (2).

A slide piece driving mechanism includes a side surface guiding portion, a shaft portion, and stopper releasing element. The side surface guiding portion is disposed at a movable side mold to guide a side surface of a slide piece to be slidably movable. The shaft portion of a stopper is disposed at the side surface guiding portion. When the slide piece reaches an upper end position, the shaft portion engages with a stopper hole of the slide piece to prevent the slide piece from falling from the upper end position due to own weight. The stopper releasing element releases the engagement of the shaft portion of the stopper with the stopper hole to allow the slide piece from falling from the upper end position due to its own weight.

The disclosed embodiment is related to a manufacturing method of a die-formed 3-dimensional plastic impeller of a centrifugal pump and the impeller manufactured thereby, including a mold for twisted blade and a mold for impeller outlet, the mold for twisted blade is configured to form a twisted blade portion of each blade of the impeller, the mold for impeller outlet is configured to form a rear portion of each blade, a hub rim part of the impeller, and a shroud rim part of the impeller so that the hub rim part, the shroud rim part, and the blades are formed in a single piece at the same molding process.

A molding device and an injection molding method thereof are provided. The molding device includes a first mold, a second mold and a sealing ring. The first mold includes a first body and at least one slide. The at least one slide is movably and detachably disposed on the first body, and has an undercut. The injection molding method includes operations of: engaging the first mold with the second mold of the molding device; filling a mold cavity defined by the first mold and the second mold with a gas, wherein the gas is blocked by the sealing ring disposed between the first mold and the second mold; injecting a molding material into the mold cavity; and opening the first mold and the second mold of the molding device.

An injection molding mold including a neck mold forming an outer surface of a neck portion of a hollow article, an injection cavity mold forming an outer surface of a body portion of the hollow article, and an injection core mold forming an inner surface of the hollow article, in which the injection core mold includes an outer core mold forming an inner surface of the neck portion including an inner screw portion and, while rotating along the inner screw portion, being movable along a rotation axis thereof, and an inner core mold forming an inner surface of the body portion of the hollow article having a smaller diameter than that of the neck portion and being linearly movable inside the outer core mold along the rotation axis.

A retaining unit includes: a movable ejector pin; a ring-shaped member used in a fixed state; and a ball plunger directly attached to the ejector pin or fixed to a fixing member attached to the ejector pin. The ball plunger is configured to press the ring-shaped member and engage the ejector pin with the ring-shaped member. When a force at a predetermined level or higher is applied to the ejector pin in a movement direction of the ejector pin, the engagement with the ring-shaped member is released so that the ejector pin is allowed to move. The ball plunger is incorporated into the ejector pin or the fixing member so as to be unitized together.

A retaining unit includes: a movable ejector pin; a ring-shaped member used in a fixed state; and a ball plunger directly attached to the ejector pin or fixed to a fixing member attached to the ejector pin. The ball plunger is configured to press the ring-shaped member and engage the ejector pin with the ring-shaped member. When a force at a predetermined level or higher is applied to the ejector pin in a movement direction of the ejector pin, the engagement with the ring-shaped member is released so that the ejector pin is allowed to move. The ball plunger is incorporated into the ejector pin or the fixing member so as to be unitized together.

A component of a mold for molding preforms made of thermoplastic material, comprising

at least a first part (10) and at least a second part (20) adapted to mold part of the outer surface of a preform,

wherein, when the first part (10) and the second part (20) are assembled to each other, at least a first surface (11) of the first part (10) and at least a second surface (21) of the second part (20) face each other and are spaced apart from each other, thus delimiting a passageway for gases or vapors to leave the mold;

and wherein at least one of said first surface (11) and said second surface (21) comprises laser-induced periodic surface structures (LIPSSs).

A piston for use in a cartridge for dispensing multi-part fluids, the piston being injection molded and having integrally formed circumferential seals, wherein the piston is molded in the absence of a longitudinal parting line across the seals. A tool for forming a piston having a plurality of circumferential seals for use in a cartridge for dispensing multi-part fluids, the tool comprising a plurality of segments together defining a piston cavity corresponding to an outer periphery of the piston.

A piston for use in a cartridge for dispensing multi-part fluids, the piston being injection molded and having integrally formed circumferential seals, wherein the piston is molded in the absence of a longitudinal parting line across the seals. A tool for forming a piston having a plurality of circumferential seals for use in a cartridge for dispensing multi-part fluids, the tool comprising a plurality of segments together defining a piston cavity corresponding to an outer periphery of the piston.