A handload or a slide are pieces of a tool that are needed to create the features that are not in the line of draw when trying to open a tool. In both cases, the tool sections must be removed from the tool before the tool can open.
With a handload, the operator must physically remove the tool section themselves to open and close a tool for molding. Handloads should be easily handled and should not be too large or heavy. Using handloads in tools is a great way to reduce tool cost, but part cost increases with longer cycle times. This is a good option for prototype, bridge, and low-volume tools for smaller- or medium-sized parts.
With a slide, this function of the molding process is done automatically without labor. Slides in tools increase initial tool costs but reduce costs in the long run by cutting cycle times and risk of issues with operator handling. Use slides in your tools when you want to reduce risk, piece prices, and/or for consistent high volumes.