Wax gates can be attached directly to the pattern. In many cases, however, the pattern is designed with gate “stubs” as shown in the picture. Wax gates can be bonded directly to the pattern surface, attached to gate “stubs or pads (see picture)” or even melted into pockets designed to hold the wax gate more securely to the pattern. You may also consider using metal sprue hardware to fasten the down sprues to the QuickCast pattern, designing in attachment pockets for nuts and bolts, which connect to the dip mounting plate hardware and be removed after burnout.
Using designed attachment features will help ensure alignment of the gates, and enhance the strength of the bond between these different material – wax and plastic.
When attaching gates it is advisable to drill small holes (1/8 inch or 3 mm) in the pattern before covering the area with a wax gate. When the wax is melted away, these holes will act as a pressure relief to keep air from expanding in the pattern during autoclave or burnout. These holes will also aid in air flow during the burnout of the pattern.
The pattern can be attached just as wax patterns with gate wax, or “sticky wax”. However, the surface to be gated may need some preparation to aid in a strong bond for the wax gate. This area can be cleaned by wiping the surface with Isopropyl Alcohol, and roughing it up with course sandpaper.