Over time, the molding process can cause wear on a mold. For example, a fine layer of material gradually builds up on the mold surfaces; if left unchecked, this vent deposit can dent the tool, causing flash and other unwanted part defects. It’s like owning a car. If you never perform regular maintenance, like changing the oil, the mechanical parts will experience wear, reduce running efficiency, and eventually fail.
Unfortunately, many molders will avoid doing maintenance until these quality problems arise or the tool breaks down. Repairing the mold at this point can be expensive and can jeopardize your part supply. However, if done regularly and correctly, preventative maintenance can improve production and lower the overall cost of owning the tool.