The invention relates to a method for producing a tube by injection molding a thermoplastic molding compound by using an injection-molding device with an article cavity, which defines the outer contour of the tube, and with an injection device, which is designed to drive a profile through the article cavity filled with the thermoplastic molding compound and thereby displace a liquid core of the molding compound, wherein the method envisages closing an opening of the article cavity with a mould core, which with the article cavity forms a hollow mould space and which has a secondary cavity that can be filled with the molding compound. After the filling of the article cavity and the hollow mould space with the thermoplastic molding compound, a projectile is driven through the article cavity, wherein the projectile displaces the molding compound into the secondary cavity. Subsequently, the mould core with the filled secondary cavity is pulled, wherein the displaced molding compound is separated from the molding compound forming the tube. The invention also relates to an injection-molding device for carrying out the method.

A method of forming a cross-car beam is provided. A composite is melted to form a viscous polymer. The polymer is injected into a mold. Pressurized fluid is injected into the mold to evacuate a portion of the viscous polymer from the mold and to form a channel therethrough. The remaining viscous polymer is cooled within the mold to form a cross-car beam.

An air activating and air cooling mold device utilized to process a workpiece includes a mold and an intake device. The mold has at least one gas channel disposed therein, and each of the at least one gas channel has an inlet and at least one outlet. The inlet is disposed on an outer surface of the mold. The at least one outlet is disposed on the outer surface of the mold, is spaced apart from the inlet, and communicates with the inlet. The workpiece is disposed on the mold and covers the at least one outlet. The intake device is mounted to the inlet of the at least one gas channel of the mold, such that gas is injected into the mold via the inlet and flows out of the mold via the at least one outlet.

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 of forming a cross-car beam is provided. A composite is melted to form a viscous polymer. The polymer is injected into a mold. Pressurized fluid is injected into the mold to evacuate a portion of the viscous polymer from the mold and to form a channel therethrough. The remaining viscous polymer is cooled within the mold to form a cross-car beam.

The invention relates to a method for producing a tube by injection molding a thermoplastic molding compound by using an injection-molding device with an article cavity, which defines the outer contour of the tube, and with an injection device, which is designed to drive a profile through the article cavity filled with the thermoplastic molding compound and thereby displace a liquid core of the molding compound, wherein the method envisages closing an opening of the article cavity with a mould core, which with the article cavity forms a hollow mould space and which has a secondary cavity that can be filled with the molding compound. After the filling of the article cavity and the hollow mould space with the thermoplastic molding compound, a projectile is driven through the article cavity, wherein the projectile displaces the molding compound into the secondary cavity. Subsequently, the mould core with the filled secondary cavity is pulled, wherein the displaced molding compound is separated from the molding compound forming the tube. The invention also relates to an injection-molding device for carrying out the method.

A method of forming a cross-car beam is provided. A composite is melted to form a viscous polymer. The polymer is injected into a mold. Pressurized fluid is injected into the mold to evacuate a portion of the viscous polymer from the mold and to form a channel therethrough. The remaining viscous polymer is cooled within the mold to form a cross-car beam.

A method for manufacturing a hollow part with a branch, including a resin filling step of filling a mold, the mold having a main cavity in which a hollowing piece is placed, and a branch cavity to communicate with the main cavity, in which a slide shaft is inserted to advance and withdraw, and that forms a branch pipe portion in an annular space between the branch cavity and the slide shaft, a step of forming a hollow main pipe portion by moving the hollowing piece to force excess resin out of the main cavity, and a shaft removing step of withdrawing the slide shaft to form a branch hollow portion, the hollow part with a branch being made of a resin and having the branch pipe portion integrally connected to the main pipe portion such that the main hollow portion and the branch hollow portion communicate with each other.

A method for the injection molding of internally hollow parts includes the steps of: injecting melt of thermoplastic material in the inner space between a punch and a matrix; opening a valve in order to place the inner space in communication with a secondary compartment; stopping the injection of the melt and opening a valve for supplying nitrogen in the inner space in order to create a cavity within the part being molded; stopping the supply of nitrogen and simultaneous perforation of the part being molded in the section of the connecting duct for the outflow of nitrogen from the mold and the subsequent possible collection thereof; and supplying pressurized air for washing towards the atmosphere after stopping the supply of nitrogen and the simultaneous perforation of the part being molded in the section of the connecting duct.

A method of forming a cross-car beam is provided. A composite is melted to form a viscous polymer. The polymer is injected into a mold. Pressurized fluid is injected into the mold to evacuate a portion of the viscous polymer from the mold and to form a channel therethrough. The remaining viscous polymer is cooled within the mold to form a cross-car beam.