Abstract: An arrangement for melting at least one solid precursor product for polymer production includes a housing for receiving the solid precursor product by way of an opening, and a melting device arranged in the housing. The melting device is disposed so that the solid precursor product can be fed thereto to be melted. A preferably switchable discharge device is connected to an opening of the housing and can be connected to an injection unit.

Abstract: An arrangement for melting at least one solid precursor product for polymer production includes a housing for receiving the solid precursor product by way of an opening, and a melting device arranged in the housing. The melting device is disposed so that the solid precursor product can be fed thereto to be melted. A preferably switchable discharge device is connected to an opening of the housing and can be connected to an injection unit.

Abstract: An arrangement for melting at least one solid precursor product for polymer production includes a housing for receiving the solid precursor product by way of an opening, and a melting device arranged in the housing. The melting device is disposed so that the solid precursor product can be fed thereto to be melted. A preferably switchable discharge device is connected to an opening of the housing and can be connected to an injection unit.

Abstract: Provided is a temperature control device having at least one temperature control branch connected to a feed, and a pump system including at least one pump for the delivery of temperature control medium in the feed. Additionally, the temperature control device is provided with at least one sensor by which at least one of the parameters from the group of temperature, through-flow amount and pressure can be detected, and a control or regulating device for regulating or controlling a delivery of the pump system, to which signals from the at least one sensor can be fed.

Abstract: An arrangement (1) for melting at least one solid precursor product for polymer production, including: a housing (2) for receiving the solid precursor product by way of an opening, at least one melting device (4) arranged in the housing (2) and so disposed that the solid precursor product can be fed thereto for melting, and at least one —preferably switchable—discharge device (5) which is connected to an opening of the housing (2) and which can be connected to an injection unit (6).

Abstract: A temperature control device (14) for a shaping tool (3) or component of a shaping working machine comprising at least one temperature control branch (2, 2?) connected to a feed (5), and a pump system including at least one pump (13) for the delivery of temperature control medium in the feed (5), wherein there is provided at least one sensor by which at least one of the parameters from the group of temperature, through-flow amount and pressure can be detected and that there is provided a control or regulating device for regulating or controlling a delivery of the pump system, to which signals from the at least one sensor can be fed. A method of operating such a device is also described.

Abstract: A process for the production of in particular fiber-reinforced thermoplastic parts in an injection molding machine, wherein the process includes bringing together a polymeric precursor, an activator and a catalyst, wherein the injection molding machine has a first plasticising screw and a second plasticising screw respectively arranged in a plasticising cylinder, wherein the polymeric precursor and the activator are mixed with the first plasticising screw without addition of the catalyst and are substantially liquefied and the polymeric precursor and the catalyst are mixed with the second plasticising screw without addition of the activator and are substantially liquefied, whereupon the contents liquefied with the two plasticising screws are mixed and jointly introduced into an injection molding mold and substantially only there polymerised to afford the plastic part.

Abstract: An injection molding method in which plastic material under pressure is injected from a storage chamber with a closable outlet into a mold cavity and fills same under pressure, wherein the volume of the storage chamber and the pressure obtaining therein upon opening of the closure means are of values which are sufficient for filling of the mold cavity by expansion of the material in the storage chamber, and the storage chamber is arranged in the mold forming the mold cavity.

Abstract: A device for expansion injection moulding, by which a polymer melt placed under pressure by a main pressure source can be injected from a storage chamber (4) into a mould cavity (3) by expansion of the polymer melt stored under pressure, the injection is optionally assisted by elastic deformation of the wall (8) of the storage chamber (4) and/or the wall (7) of a runner 6 leading to the storage chamber (4), the storage chamber (4) having an exit (5) which can be shut off, wherein the storage chamber (4) is arranged in a mould (1) which forms the mould cavity (3) and an additional pressure accumulator and/or an additional pressure source is (are) provided which is (are) capable of exerting additional pressure on the polymer melt during injection of the polymer melt into the mould cavity (3), in order to fill—preferably completely—the mould cavity (3).

Abstract: An injection moulding method in which plastic material under pressure is injected from a storage chamber with a closable outlet into a mould cavity and fills same under pressure, wherein the volume of the storage chamber and the pressure obtaining therein upon opening of the closure means are of values which are sufficient for filling of the mould cavity by expansion of the material in the storage chamber, and the storage chamber is arranged in the mould forming the mould cavity.

Abstract: An apparatus for the injection molding of plastic material, comprising a mold (7) into which molten plastic material is introduced, wherein there is provided a device for introducing liquid, in particular water, into the interior of the molten material, which includes a pump (3) driven by a motor (4), wherein the speed of rotation of the motor (4) and/or the stroke volume of the pump (3) is variable.

Abstract: An apparatus for the injection molding of plastic material, comprising a mold (7) into which molten plastic material is introduced, wherein there is provided a device for introducing liquid, in particular water, into the interior of the molten material, which includes a pump (3) driven by a motor (4), wherein the speed of rotation of the motor (4) and/or the stroke volume of the pump (3) is variable.

Abstract: A method of processing plastic material, wherein the plastic material is pressure-lessly distributed over the lower mold half of a mold divided in a horizontal plane, then the mold is closed and the mold cavity is entirely filled with molten material whereupon a fluid is injected into the molten material and a portion of the molten material is displaced into a secondary cavity by the fluid.

Abstract: A process is disclosed for controlling a production machine, in particular an injection moulded machine that produces injection moulded plastic parts. During a learning cycle, rating fields that indicate the relationship between selected quality parameters of the products and selected setting parameters of the machine are determined and stored. To allow the machine to be controlled by entering the actual target values, i.e. the quality parameters of the products, the set values or set value ranges for at least two selected quality parameters are entered into a control device. The control device then determines at least one set of selected setting parameters on the basis of the stored rating fields, all predetermined quality parameters simultaneously corresponding to the predetermined set values or lying in the predetermine set value ranges.

Abstract: A method for supplying a selected quantity of gas to the mold of an injection molding machine utilizes two high pressure gas bottles which are connected through a pressure reducing valve to a piston reservoir for receiving a quality of the gas. The piston reservoir is hydraulically powered to supply the gas to a further piston reservoir having a smaller volume which is connected through a valve to the mold. The second piston reservoir is also hydraulically powered for supplying a selected quality of gas under a variable pressure to the mold. Gas from the mold is recycled to both reservoirs in steps.

Abstract: A process for tempering tools, for use on the form tools of extrusion forming machines. In the injection molding tools there are conduction circuits for a coolant which are connected to ducts for the inflow and backflow of the coolant. Valves (4) control the throughflow of the coolant. There are temperature sensors (5, 6) in the ducts for the inflow and backflow of the coolant. The temperature sensors (5, 6) are connected to a computer (7) which controls the opening and closing times of the valves (4) as a function of a nominal difference fed in between the inflow and backflow temperatures of the coolant. Advantageously, a temperature sensor (3) which is also connected to the computer (7) is provided on the form tool.