Folding accuracy test
Dimension measurement: Use standard size paper (such as A4 paper) for folding test. After folding, use a high-precision ruler (such as a vernier caliper) to measure the size of the folded paper. For the half-fold method, check whether the two sides of the folded paper are completely aligned, and the error should be controlled within ±1mm; for multiple folding methods, such as three folds or four folds, measure the size of each folded part to ensure that it meets the expected folding specifications.
Crease quality check: Observe whether the crease is clear and straight. The crease of a high-quality folding machine should be a straight line without skew, wavy or broken. The quality can be judged by observing the folded paper against the light source or touching the crease with your hand. If the crease is not clear, it may be due to insufficient pressure of the folding roller, surface wear or paper quality problems.
Repeatability test: Perform multiple folds in the same way, such as folding 10 identical sheets of paper in a row, and check whether the folding accuracy of each sheet is consistent. This can reflect the stability and accuracy maintenance ability of the folding machine during long-term work.
Folding speed test
Timing test: Prepare a certain number (such as 100 sheets) of the same paper. After the device starts folding, use a stopwatch to record the time required to complete all folds. Then calculate the number of folded sheets per minute to evaluate the actual folding speed of the folding machine. It should be noted that the test speed should be carried out under normal working conditions of the equipment to avoid factors such as paper quality and paper feeding method affecting the test results.
Speed stability test: During the folding process, observe whether the equipment can maintain a stable speed. You can judge by listening to whether the sound of the equipment is uniform and observing whether the rhythm of paper transmission and folding is consistent. If the equipment speed is unstable, it may cause paper jams or reduced folding quality.
Paper adaptability test
Test of different types of paper: Collect several types of paper commonly used in the pharmaceutical industry, such as offset paper, coated paper, etc., and put them into the folding machine for folding tests. Observe whether the paper is smooth during transmission and folding, and whether there is any jamming, wrinkling or scratching of the paper. For each type of paper, at least 10 sheets of folding tests are performed to fully evaluate the adaptability of the equipment to different paper types.
Test of different thickness of paper: prepare different weights of paper (such as 60g/m², 100g/m², 150g/m², 200g/m²), and perform folding tests in order from small to large. Check whether the equipment can handle these different thicknesses of paper normally, especially thinner and thicker paper. Pay attention to whether the folding roller can apply enough pressure to fold the paper neatly when folding thicker paper, and whether it can avoid the situation of multiple layers of paper being conveyed at the same time when folding thinner paper.
Operation stability test
Continuous operation test: let the folding machine run continuously for a period of time, such as 4-8 hours, to simulate the long-term working state in actual production. During the operation, pay close attention to whether the equipment has paper jams, overheating, abnormal noise or vibration. If the equipment can work stably during continuous operation, it means that it has good operation stability.
Load change test: during the folding process, appropriately change the amount of paper (such as gradually increasing from a small amount of paper to the maximum paper feed of the equipment) or the type and thickness of paper, and observe the equipment's ability to cope with load changes. The equipment should be able to automatically adapt to these changes and maintain normal operation without frequent paper jams or shutdowns.
Automation function test (if the equipment has automation function)
Automatic paper feeding test: Check whether the automatic paper feeding function is normal. Put a certain amount of paper into the paper feeding tray, turn on the automatic paper feeding function, and observe whether the paper can enter the folder one by one at the set speed and order. During the test, pay attention to check whether the paper feeding is accurate, whether there are multiple sheets of paper entering at the same time or the paper feeding is not smooth.
Automatic deflection correction test: Deliberately place the paper slightly skewed into the paper feeding tray, start the folder, and observe whether the equipment can automatically correct the paper transmission direction so that the paper can enter the folding area correctly for folding. The automatic deflection correction function is very important to ensure the folding quality, especially when handling a large amount of paper.
Automatic counting and automatic stop test: Set a folding number target (such as 1000 sheets), turn on the automatic counting and automatic stop functions, and start the folder. When the folding number reaches the set target, check whether the equipment can automatically stop working. At the same time, check whether the actual folding number is consistent with the set counting target to test the accuracy of the automatic counting function.