Attach the clamps on the fixed-platen side to prevent the mold from rotating or the locating ring from disengaging from the alignment hole, but do not yet fully tighten the bolts to the specified torque value.Ī. You can make sure the locating ring remains engaged in the platen alignment hole by occasionally looking at it from the barrel side.ġ9. Advance the moving platen until it just touches the back of the mold.Ī. This is a good time to check the machine’s safety switches.ġ7. Do not let the edges or corners of the mold hit the platens or tiebars. With your hand on the side or top edge of the mold, guide it into the machine and engage the locating ring into the alignment hole in the fixed platen.Ī. Use safety cones, barrier tape, or other preventive measures.ġ5. Make sure no one is in the immediate area during this process. Keep your fingers away from the chain links.ī. Check that the robot, picker, or other automation is safely out of the way.ġ4. Lift the mold up over the tiebars and lower it into the molding area.Ī. Check for obstructions above the machine, such as sprinkler heads, ceiling fans, etc.ī. Check that the crane can adequately lift the mold over the machine’s tiebars.Ī. If the bolts are lubricated (with cadmium plate, molybdenum disulfide, anti-seize compounds, etc.), the friction is reduced and greater preload is produced with the same torque.ġ3. If the bolts are not lubricated, 85% of the torque is used to overcome friction and only 15% is available to produce bolt load. If the bolts are too short, with insufficient engagement, or too long and “bottom out,” you can strip the threads in the platen.Ī. Check that the clamp bolts are the correct length.Ī. Check that the clamp bolts have the correct thread type: English (SAE) versus Metric.ġ1. Spray a light mist of “overnight” preservative or WD-40 on the platens and the clamp-plate faces of the mold.ġ0. Check for damage to the clamp bolt threads in the platens.ĩ. Check for “dings” or raised areas on the mold and platen-especially the locating-ring alignment hole.
Clean the machine platens and the mold’s clamp-plate faces.Ī. Many materials, such as PVC or POM (acetal), produce gases that can develop high pressures within the barrel.ħ. Check that the resin is not degrading in the barrel from sitting there too long.Ī. The barrel heats may be on or off, depending on the situation.Ħ. Ensure the carriage is back and/or the screw is forward.ī. Write down or find an appropriate nozzle tip type and size before you forget.ĥ. It will be difficult to check after the mold is installed.Ī. Check the size and condition of the nozzle seat.
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