Device and method for producing reaction plastics

A device for producing reaction plastics, comprising:

• a first metering device with a first metering unit and a second metering unit, each of which is designed for receiving and dispensing a first mixing component in a metered manner;
• a second metering device which is designed for receiving and dispensing a second mixing component in a metered manner;
• and
• a mixing device, which is designed for receiving and mixing the first mixing component dispensed by the first metering unit and/or the second metering unit of the first metering device and the second mixing component dispensed by the second metering device;
• wherein the first metering unit and the second metering unit are connected to the mixing device such that prior to beginning the mixing process, the first mixing component is able to be brought to an operating state required for the mixing process, by guiding the first mixing component from the first metering unit to the second metering unit via the mixing device, wherein a required operating state is a pressure, a temperature and/or a viscosity, and
• wherein the first metering unit and the second metering unit have respectively a metering piston with a drive by spindle and nut, and a servomotor.

A device for producing reaction plastics, comprising:

• a first metering device with a first metering unit and a second metering unit, each of which is designed for receiving and dispensing a first mixing component in a metered manner;
• a second metering device which is designed for receiving and dispensing a second mixing component in a metered manner;
• and
• a mixing device, which is designed for receiving and mixing the first mixing component dispensed by the first metering unit and/or the second metering unit of the first metering device and the second mixing component dispensed by the second metering device;
• wherein the first metering unit and the second metering unit are connected to the mixing device such that prior to beginning the mixing process, the first mixing component is able to be brought to an operating state required for the mixing process, by guiding the first mixing component from the first metering unit to the second metering unit via the mixing device, wherein a required operating state is a pressure, a temperature and/or a viscosity,
• wherein the mixing device has a feed line for feeding the first mixing component into the mixing device, and a discharge for discharging the first mixing component out of the mixing device,
• wherein the first metering unit is connected to the feed line via a first valve and to the discharge via a second valve,
• wherein the second metering unit is connected to the feed line via a third valve and to the discharge via a fourth valve, and
• wherein the valves can be opened and closed independently of one another.