The production capacity of plastic injection molding machine can be calculated through the following steps:

1. Determine the theoretical injection volume of the injection molding machine, usually in grams. This is one of the important factors of the injection molding machine model, which determines the amount of plastic that can be produced per injection.

2. Determine the injection cycle, that is, the time required to complete a complete injection process. The injection cycle includes injection, pressure holding, cooling and mold opening. It is usually measured in seconds.

4. Calculate the output per hour. This can be done by dividing 60 (seconds per minute) by the injection cycle and multiplying by the amount of plastic produced per injection (theoretical injection volume). In this way, the theoretical output per hour can be obtained.

It should be noted that the actual production capacity may be affected by many factors, such as material properties, mold design, machine efficiency, operator skills, etc. Therefore, these factors should be taken into account when calculating the production capacity and adjusted according to the actual situation.

In addition, in some cases, it may be necessary to further calculate the daily output or the monthly output. This can be done by multiplying the output per hour by the number of working hours per day or the number of working days per month.

To sum up, the calculation of production capacity of plastic injection molding machines involves many factors, including theoretical injection volume, injection cycle and working time. By reasonably considering these factors and making appropriate adjustments, the actual production capacity of the injection molding machine can be estimated more accurately.