A preheat assisted injection/compression molding system for producing thin wall, high fiber content, high flex modulus thermoplastic composites at high temperature includes a press, an injection mold operably coupled to the press and including a first mold portion having a first inner mold surface, and a second mold portion with a second inner mold surface, and a resin injection system configured to inject a molten, free flowing resin into the injection mold. A mold surface pre-heating system includes a heating element configured to selectively heat at least one of the first and second inner mold surfaces to a predetermined temperature at a predetermined depth before the resin is injected into the mold. A cooling system is configured to selectively cool at least one of the first and second inner mold surfaces to rapidly cool a molded part formed by compressing the resin with the press.

Methods for preparing thermoplastic automotive appliques include applying heat from an auxiliary heater to a tool cavity of a forming tool. The auxiliary heater is activated for a period of time until a temperature of the heated tool cavity is heated to less than or equal to about a melting temperature of the thermoplastic. The heated tool cavity is filled with the thermoplastic, and a cooling fluid is pulsed through the forming tool. The thermoplastic applique is then removed, and the supply of cooling fluid is turned off.

A method for producing an optical article having a Fresnel microstructure and an injection molding system for producing such an article. The method includes heating and cooling a mold and applying a pressure to a thermoplastic material during injection molding of the optical article to facilitate formation of the Fresnel microstructure.

An injection molding apparatus including an injection device, a mold, a gas supply device, and a temperature control device is provided. The mold has a mold cavity, wherein the injection device is adapted to inject a material into the mold cavity. The gas supply device is adapted to supply a gas to the mold cavity such that the pressure in the mold cavity is increased. The temperature control device is adapted to control the temperature in the mold cavity. In addition, an injection molding method is also provided.

The present invention relates to a method for the production of injection-moulded, reinforced moulded parts, the fibre orientation of which is specifically adjusted on a local basis. Via suitable, dynamically controlled supplementary heating in the wall of the injection mould which is used (variotherm heatable channel), a local cavity region is hereby heated at the time of injection to a temperature in the region of or above the solidification temperature (in any case above the crystallisation temperature in the case of partially crystalline plastic materials or above the glass transition temperature in the case of amorphous plastic materials) of the polymer (plastic material moulding compound).

A method for the variothermal temperature control of an injection mould using a temperature control device, the method including at least the following steps: in a learning phase, determining a temperature control characteristic of the temperature-controllable system including at least the injection mould and the temperature control device, in order to obtain individual reference values for the system, with which the temperature control device can be controlled in order to obtain a nominal temperature profile; and in a production phase: temperature control of the injection mould with the reference values determined during the learning phase; determining deviations of an actual temperature profile of the injection mould in relation to the nominal temperature profile during the production cycle and calculating corrected reference values from these deviations; and carrying out a resulting production process using the corrected reference values.

In the injection compression molding mold, cooling water passages are provided between a fixed-side surface formation portion and a heater, cooling water passages are provided between a movable-side surface formation portion and a heater, and a cavity is formed by the fixed-side surface formation portion, the movable-side surface formation portion, and a looped member. When the fixed-side surface formation portion and the movable-side surface formation portion are heated to predetermined temperature, resin is injected and filled into the cavity. Next, inside of the cavity is pressurized, and then heating is stopped and cooling water is supplied to the cooling water passages to perform cooling. Then, before the resin is completely solidified, the resin in the cavity is compressed while being cooled and solidified.

A method for producing an optical article having a Fresnel microstructure and an injection molding system for producing such an article. The method includes heating and cooling a mold and applying a pressure to a thermoplastic material during injection molding of the optical article to facilitate formation of the Fresnel microstructure.

Disclosed is an injection mold. The injection mold includes a mold set having n molds (n is a natural number of 2) defining a cavity for injection molding a green body, and at least one ejector provided on at least one of the n molds to separate an injection-molded part from the mold set. The ejector is provided with a first heater capable of heating the mold set to a first temperature.

An injection mold that has an injector mold plate with a first injector mold plate face and an opposite second injector mold plate face, an ejector mold plate having a first ejector mold plate face and an opposite second ejector mold plate face, with the first injector mold plate face faces the first ejector mold plate face, at least one tempering medium channel connecting a tempering medium inlet of the injection mold to a tempering medium outlet of the injection mold, wherein the at least one tempering medium channel traverses an area of at least one of the second injector mold plate face and/or the second ejector mold plate face and defines a free opening in the respective mold plate face along at least a length of the at least one tempering medium channel.