JB/T 12554-2016The test method of energy consumption for die-casting machines (English PDF)

4.2 Test requirements

4.2.7 Hot-chamber die-casting machine

The temperature of the holding furnace, the nozzle temperature, the gooseneck temperature system are all set to the ambient temperature.

4.2.8 The oil temperature of the hydraulic system shall be within 30 °C ~ 55 °C.

4.2.9 There is no option for tracking of the injection plunger of the cold chamber die-casting machine.

4.2.10 The nozzle action of the hot-chamber die-casting machine is selected as the fixed nozzle.

4.3 Test method

The test method is as follows:

a) Confirm the integrity of the tested sample machine.

b) Reliably connect the three-phase power tester TO the power inlet end of the die-casting machine.

c) Set the parameters of the cold-chamber die-casting machine, according to Table 1 and Table 3; complete the filling in Table 1. Set the parameters of the hot-chamber die-casting machine, according to Table 2 and Table 4; complete the filling in Table 2.

d) After sample machine to be tested enters the state of continuous operation, in fully automatic mode, AND confirming that the sample machine to be tested reaches thermal equilibrium, start the energy consumption test.

e) For each test, the number of dry cycles shall meet the requirements of 4.2.4.

4.4 Data collection

After the energy consumption test is over, the following data shall be collected, on the man-machine interface of the three-phase power tester and the tested sample machine, respectively:

a) The electrical energy consumption of the whole machine E, in the unit of kilowatt hour (kW·h);

b) The power factor of the whole machine cos phi;

c) The number of cycles n, in the unit of cycles;

d) The time of one dry cycle of the tested sample machine t, in seconds (s)

4.5 Energy consumption calculation

The energy consumption is calculated as follows:

a) The energy consumption per cycle, Ed, is calculated according to formula (1).

Where:

Ed - Energy consumption per cycle, in kilowatt hour per cycle (kW·h/cycle);

E - The energy consumption of the whole machine, in kilowatt hour (kW·h); n - The number of dry cycles, in cycles.

b) The specific machine related electrical energy consumption, Eb, is calculated according to formula (2).

Where:

Eb - The specific machine related electrical energy consumption, in kilowatt hour per kilo-Newton cycle [kW · h/ (kN · cycle)];

F - The measured clamping force of the tested sample machine, in kilonewtons (kN)