Material Leakage

Recommended Actions

• Material Leakage is usually caused by material forces overcoming the structural strength of the mold.
• NOTE: One sign that indicates that material has leaked is that the manifold reaches processing temperature very slowly.
• Possible Solutions
• Manifold locator is oversize.
• Processing temperature may be too low causing increased pressure in the manifold.
• Manifold locator may be hobbed into the mold. Decrease the force applied to the nozzle pad by the machine then repair the damaged area, then check and if necessary replace the locator.
• Insufficient number of mold assembly screws. Ensure that the quantity, type of screw, and the location of the screws correspond to the general assembly drawing.
• Nozzle may have overheated causing damage to the seal or gate. Check/replace the thermocouple in the nozzle, then check and if necessary repair the nozzle well area.
• Manifold may have overheated. Check and replace if necessary the following components
• nozzle well area, thermocouple, valve disks, sprue disks, or pressure disks.