How to deal with the inaccurate loading of powder packaging machine? Sometimes we find that the loading capacity of the powder packaging machine is inaccurate. What should we do at this time?

1. Relationship between packaging accuracy of powder packaging machine and screw: powder packaging machine, especially for low-dose powder packaging machine, that is, the packaging specification is in the range of 5-5000 G. The conventional feeding method is screw feeding, which is still the metering method, and there is no immediate weighing. Screw blanking is a volume measurement method. The consistency of each pitch volume is the basic condition to determine the measurement accuracy of powder packaging machine. Of course, pitch, outer diameter, bottom diameter and spiral blade shape will affect the packaging accuracy and speed.

2. Relationship between packaging accuracy of powder packaging machine and spiral outer diameter: the packaging accuracy of powder packaging machine has a very direct relationship with spiral outer diameter. The premise of relationship with pitch is that the size of spiral outer diameter has been determined before comparison. Generally speaking, when selecting and matching the metering screw, the powder packaging machine is generally determined according to the size of the packaging specification, and the specific gravity of the material will be properly adjusted.

For example, when our low-dose packaging machine packs 100g pepper, it usually selects a spiral with a diameter of 38mm, but if the packaging is glucose with high bulk density, it is also 100g, so we should use a spiral with a diameter of 32mm, that is, the larger the packaging specification, the larger the outer diameter of the spiral, which can ensure both packaging speed and measurement accuracy;

3. Relationship between packaging accuracy and pitch of powder packaging machine: how about packaging accuracy and pitch of powder packaging machine? Here we can give an example to illustrate. For example, when packing 50g cumin powder, our seasoning packaging machine is selected φ For the spiral with outer diameter of 30mm, the pitch we selected is 22mm, the accuracy of 0.5g is more than 80%, and the accuracy of 1G is more than 98%. But we see peers using it at customers φ What happens if the pitch of a screw with an outer diameter of 30mm exceeds 50mm? The blanking speed is very fast, and the measurement accuracy is about 3 grams.

The industry standard QB / t2501-2000 requires x (1) level weighing instrument with package size ≤ 50g, and the allowable deviation is 6.3%, which also meets the X standard. However, for customers, packaging accuracy is directly related to product cost, which is better or worse.