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Are molding factories that wasteful in use of resources?

TOP > Environmental Activities > 'factor 4 > Are molding factories that wasteful in use of resources?

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Are molding factories that wasteful in use of resources?
The high temperature in molding factories is the evidence of wastage

In majority of the molding factories, improvements to enhance efficiency are consistently being carried out. However, are such molding factories inefficient in energy usage?

Taking the injection molding process of resins as an example, what are the necessary energies required? Critically speaking, only 'energy to heat resins to appropriate temperature' and 'energy to inject melted resins into molds' are required. Any other energy used considered wasted. However, in the case that molded resins are cooled and heat is released in the form of water or other medium out of the factory, energy is required to circulate and cool the water.

However so, energy of volume many times of that of minimum energy required is being wasted in reality.
The high temperature in molding factories is the evidence of excessive heat release and wastage of energy.
Even when sprue runners are being recycled, energy is consumed to heat and melt the runners. More wastage occurs when these sprue runners are not even being recycled.

The vaporization of water from cooling tower during winter or when the weather is cool is also another evidence of wastage. Water cools automatically during winter and should not need to be cooled by the cooling tower. In addition, chiller tends to cool more water than required and cooled water are being heated again due to demand at times.

Despite consistent efforts to eliminate wastage thoroughly, many forms of wastage still remain from the point of view of resource productivity.

When talking about increasing efficiency in factories, many aim at enhancement of labor productivity (using the least labor to achieve maximum production). However, I think that it has become important to improve resource productivity (using the least resource to achieve maximum productivity).