Lesson: Injecting a Mold

Lesson: Injecting a Mold
• Turn on wax injector, let it heat up.
• Make sure that the temperature dial is pointing to the black band.
• Check that air hose is connected.
• To connect air hose:
• Pull down on brass collet.
• Push end of hose up against fitting on injector.
• Release the collet.
• If the hose is on properly, releasing the collet will lock it in place.
• If it is not on properly, it will detach immediately. Repeat above steps and push harder when fitting onto injector.
• Once indicator light is not constantly on, the wax should be molten. Adjust the pressure to be between 5-10psi.
• Adjust the pressure by twisting knob to the right for more pressure.
• If the pressure is too high, twist knob to the left, then pull up on brass ring on the top of the injector. The ring releases and resets the pressure inside the injector.
• Make sure dish/non-stick foil is under wax injector spout.
• Place aluminum plates on top and bottom of mold.
• Have mold opening just at or slightly beyond edge of plates.
• Hold plates and mold tightly.
• Press against injector nozzle.
• Pull away.
• This injector works very quickly. You do not need to hold the mold against the nozzle- it takes less than a second to inject.
• The wax is hot! It is molten at approx. 165 degrees. Please be careful!
• Let mold cool approx. 30sec-1min. The mold should be cool to the touch, and the button of wax at the end of the mold should be opaque.
• Open up and gently pull out wax.
• Repeat.
• If you are the last one here- make sure to turn injector off!!!
Opening and Closing the Wax Injector:
• Disconnect the air hose, and release the pressure in the injector.
• Using the welding gloves, loosen the 2 top screws.
• Push the lid back.
• Close be returning lid to original position.
• Tighten screws.
• Reconnect the air hose. The pressure will automatically reset once the hose is connected.
Troubleshooting:
• My mold isn’t filling completely: Hold mold against injector a bit longer. Make sure you are holding the mold straight, not tilted up or down.
• My wax is sticking to the mold: Brush a light coat of talc on both sides of mold, making sure to get into all crevices. Or spray Mold Release on both sides of mold. Do not aim mold release up or at another person. Do not use near flame or hot objects. Use your face mask with mold release spray as it is an aerosol.
• The wax is going everywhere: Hold mold tighter between plates. Press against nozzle for less time.
• The injector is making a spluttering noise when I inject a wax: Open the top lid and check the wax. If the level seems low (less than ½ full) add more wax. If you see a solid chunk of wax upon opening the lid, wait a bit longer- the wax is still heating up.