In this picture we see two different shaped parison for the same container. The parison on the right is for blow and blow and the shorter one on the left is NNPB. This is a prime reason for the extended run time.
The shorter parison is necessary for NNPB to reduce the amount of pressure needed to press the parison. Besides the fact the plunger does not need to press as far, another factor is in the “gate and gain” factors. The gate is the space between the plunger and the blank the glass flows through to reach the neckring. The gain is the angle leading to the gate. The bigger the gate or the more gain, the easier it is to press the glass. Since the finish wall determines the gate, we cannot make changes to it, however the gain can be opened up.
This is illustrated here. The gate is were the black line crosses the parison and for all intent and purposes it is the same for both. However the gain, the blue line, on the NNPB parison is much greater. This will let the glass flow into the neckring easier without the need for high plunger up pressure.
In this picture we see two different shaped parison for the same container. The parison on the right is for blow and blow and the shorter one on the left is NNPB. This is a prime reason for the extended run time.The shorter parison is necessary for NNPB to reduce the amount of pressure needed to press the parison. Besides the fact the plunger does not need to press as far, another factor is in the “gate and gain” factors. The gate is the space between the plunger and the blank the glass flows through to reach the neckring. The gain is the angle leading to the gate. The bigger the gate or the more gain, the easier it is to press the glass. Since the finish wall determines the gate, we cannot make changes to it, however the gain can be opened up. This is illustrated here. The gate is were the black line crosses the parison and for all intent and purposes it is the same for both. However the gain, the blue line, on the NNPB parison is much greater. This will let the glass flow into the neckring easier without the need for high plunger up pressure.
การแปล กรุณารอสักครู่..
