How long does it take to change compression molds from another header or shoulder?

The time to change compression molds (dia 18-60mm) for shoulder-making machine: we have 2 mode of machine. Mode#1 is our Heading machine JX-70, with productivity of 50-70 tubes/min, it will spend about 1 hour. Mode#2 is our Heading machine JX-120A, with productivity of 90-120 tubes/min, it will spend about 2~3 hours. Our designs on Woolley machines relatively spend less time for changing the tube compression molds, changing PE material colors, and changing spraying nozzle and orifice pin molds.