Cutter with knife causes and solutions

Cutter is made QZ off 80 years of the twentieth century began production of a packaging and printing equipment. Because of its simple structure, low energy consumption, long life, cheaper prices and other characteristics, production and sales have been good, there are still many tens of thousands of manufacturers to users. However, as the equipment is usually done with a mechanical extension spring to press the paper type body structure of the electromagnetic clutch transmission organizations doing cutting knives, knives and even prone to cause accidents.

This paper detailed analysis of the original cutter design, look for the original design found wrong, and made safe and reliable paper cutter new transformation program. Analysis of cutter knife with

Click "Crop" button, more than two running up and down, said cutter with knife. View of the structural characteristics of QZ202 Cutter off its lead even the main reason for the cut-off knife cutter hit the limit switch limit switch failure or contravention, and the relay contact adhesion or stagnant.

Solution with a knife cutter program

1, QZ202 Cutter off the top of the conical cam limit switch structure. Cutter cone structure makes the model drop faster cutter body, the lowest level when the tool holder body, but also the maximum instantaneous power cutter cut points, the top cone hit the limit switch, tool holder body and can quickly return. The power failure hit the stop switch structure (conical top position) time is short, short interruptions are caused by instantaneous communication with a large knife hidden.

This, refer to the German POLAR cutter knife hit the stop limit switch structure, the limit switch cam cutter hit the top of the cone-shaped block into oval-shaped bodies hit the stop switch so that the top position of power extended buffer area, which can effectively prevent the short interruption caused by instantaneous communication with knife incidents. Shanghai Tobacco Packaging and Printing Co., Ltd.

2, limit travel switch out of control, will lead off the limit switch is not open. QZ202 limit switch off Cutter has two sets of contacts to use, but only use one of the working process Cutter, the contact state is inevitable there will be occasional failures, that is the limit when the limit switch was hit, no time off. The limit switch contacts in the free use of a group together, increases the probability of power, at no additional cost to the case of failure caused by the contacts with reduced risk of over half of the knife.

3, cutting control relay. QZ202 off cutter-type relay selected for the JZ7-44 type action applies only to non-frequent occasions, contacts can flow resistive load AC380V/5A, DC127V/5A. However, the output of the second type of cutter load DC32V/3.2A, and for the inductive load, the impact of current, voltage withstand 7 times higher than the contacts above. So contact spark, easy burning, black, etc., to increase the contact resistance, reducing the loop voltage. More serious is the contact for a long time frequently carry emotional impact of high current, causing contact adhesion or cold welding Slow motion, slow off resulted in failure with knives. Actual production, because of over-current contacts JZ7-44 is too small, failure quickly, causing some users to run the new machine a few months, we must replace the relay.

CJ10-20A contactor with arc hood, with a large over-current contacts, sparks, long life, quick action and other characteristics, suitable for frequent opening and closing of the occasion. The models proved to switch CJ10-20A contactor with arc hood, the results are obvious, can greatly reduce or eliminate even the knife incident.

4, the brake device. Many manufacturers in order to save money, the principle of circuit brake, namely through the upper and lower limit level sensor cut off the electrical power supply means cutter brake, QZ202 off Cutter is no exception. The device in the sudden loss of power socket loose such circumstances, may cause blade caused by the slip with knives and other extremely dangerous situation. To prevent this from happening, that they must use the motor with mechanical brake components, so no matter what circuit fault, the motor is locking, and avoid accidents.