The invention relates to a method of manufacturing a plastic frame for a two-wheeler having at least one hollow space in the interior by means of plastic injection molding having a series of method steps, wherein a fluid is injected to displace the plastic core from the component cavity after the injection of a preferably thermoplastic plastic melt into a closed injection molding tool.

A method produces an injection molded part. A plastic material is injected into a cavity for forming the injection molded part. The plastic material in a flow line region of the cavity, where the plastic material from two directions coincides during an injection molding process, is at least partially removed from the cavity via at least two overflow points and, in so doing, is locally swirled or mixed between the overflow points.

The invention relates to a method for producing a fork which has at least one cavity in the interior and which is made of a thermoplastic for a two-wheeled vehicle by means of a plastic injection molding process and a fluid injection process, having the following steps: closing a configured injection molding tool; injecting a plasticized plastic melt into the closed injection molding tool; injecting at least one fluid into the closed injection molding tool in order to displace the plastic core out of the interior of the fork or in order to fill at least one molding cavity which is introduced into the injection molding tool; cooling the injection molded component; and opening the injection molding tool and removing the fork.

A method produces an injection molded part. A plastic material is injected into a cavity for forming the injection molded part. The plastic material in a flow line region of the cavity, where the plastic material from two directions coincides during an injection molding process, is at least partially removed from the cavity via at least two overflow points and, in so doing, is locally swirled or mixed between the overflow points.

A method is described for injection molding a hollow object. The method has the steps of: (i) waiting for a cycle start signal from a press, (ii) upon receiving the cycle start signal, driving an actuator in order to regulate a flow of molten material towards a mold cavity by displacing a shutter, (iii) after a certain time, or simultaneously, sending a fluid injection signal to an injection unit in order to command the latter to activate a fluid injector to inject fluid under pressure into the mold cavity; (iv) after a certain time, or simultaneously, driving the actuator in order to regulate, by displacing the shutter with positional continuity and/or according to a programmed dynamic profile, a flow of molten material that the pressurized fluid is removing from the cavity and pushing towards the press.

According to embodiments, provided is a support manufacturing method comprising the steps of: forming a first injection-molded product by using a first material; injecting a second material into at least a portion of the first injection-molded product; forming a second injection-molded product including a hollow by discharging the second material from the first injection-molded product; and forming a third injection-molded product by covering at least a portion of the outer surface of the second injection-molded product with a third material.

Disclosed is a pierceable septum for use in drug reservoirs and infusion sets. The pierceable septum has an elastic core made from a core material and a surround made from a surrounding material. The surrounding material is more rigid than the core material. The elastic core is fully embedded in the surround.

A resin pipe is manufactured by injecting a molten resin from one end portion toward the other end portion of a cavity formed in a mold by an injector and filling the molten resin in the cavity, and then introducing a fluid or solid assist material by an assist material injection device from the other end portion toward the one end portion of the cavity to discharge an extra molten resin from the cavity, thereby curing the molten resin in a cylindrical shape remaining in the cavity. The extra molten resin discharged from the cavity is caused to flow back into the injector, and the back-flowed molten resin is injected and used from the one end portion toward the other end portion of the cavity by the injector when manufacturing a next new resin pipe.

The invention relates to an injection molding method of manufacturing a two-wheeler frame in which a melt of a thermoplastic is injected into a cavity of an injection molding tool before a portion of the plastic melt is displaced from the cavity again by a subsequent fluid injection to form the inner hollow space of the tubular frame, with the fluid flowing upward in the course of the displacement process.

The present invention concerns a method for injection moulding an ultra-thin walled article such as a glove (1), having in the thickness range 0.01 mm to 2.50 mm. The method entails injecting plasticised material into a mould and then stripping the moulded article from the mould, it being a feature of the invention that the valve gates adjacent to the surface of the mould are opened and closed independently of the injection stroke of the main injection barrel such that maximum or near maximum injection pressures may be built up within the plasticised material in the runner system before the valve gates are opened to allow material to flow into the mold cavity. In this respect, the present invention enables techniques associated with injection moulding, such as for example the production of engineered surface finishes or of localised variations in thickness, to be applied to thin-walled articles.