Blow molding machinery is used to create hollow containers or parts made from plastic. In addition to overseeing operations during this process, the operator is responsible for keeping extrusion blow molding machines in optimal condition. As part of this, the machinery must be purged. This consists of cleaning the interior portion of the machine, which primarily focuses on ridding it of plastic residue.

Even when machinery is purchased from a reputable extrusion blow molding machine manufacturer, after so much use, it must be purged. There are several key benefits when using the appropriate pursing compound and going through the procedure correctly. These include reducing machine downtime, experiencing less material waste, having fewer container or part rejects, and facilitating color and material changeovers more quickly.
The purging compound used for extrusion blow molding machine is a specially made commercial-grade product. Typically, the compound is comprised of a base resin with various additives mixed in so that not only is the machine purged but also the die, screw, and barrel. However, a purging compound has other purposes. For instance, it cleans a hot runner mold and removes carbon and color deposits. It is important to note that depending on the type of compound, the dies and screws may not be left in place during the purging process.

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