German COMINTEC brake COMINTEC model COMINTEC price

COMINTEC brakes, also known as disc brakes, pneumatic brakes, air-operated disc brakes, and air-hydraulic pneumatic brakes, are a type of industrial transmission brake. They are actuators that use air pressure to stop or decelerate moving parts in machinery. The structure is simple, installation is convenient, and they are durable, resistant to pressure, drops, and impacts, with a long service life. Generally, only the brake pads need to be replaced, which is easy and convenient. They utilize magnetic effects.

COMINTEC Brake Introduction

Pneumatic brakes control the friction between the brake disc and friction plates based on air pressure to adjust the braking force on the paper roll. The installation, structure, and tension control principle of the pneumatic brake are shown in the figure. The installation position of the pneumatic brake and the paper roll mandrel is shown in (a) of the figure. The structure of the pneumatic brake is shown in (b) of the figure. The brake disc 5 is connected to the paper roll shaft. Fixed friction plates 8 and movable friction plates 7 are installed on both sides of the brake disc 5. Generally, there is a gap of 1 to 2mm between the fixed friction plate 8 and the brake disc 5 (the gap is adjustable). The movable friction plate 7 is installed on the piston shaft 4 of the cylinder. The compressed air interface 2 on the left side of the piston is connected to the air compressor, and the right side of the piston is connected to the atmosphere through the air hole 1. The friction force between the movable friction plate 7 and the brake disc 5 is controlled by the air pressure on the left side of the piston, thereby controlling the braking force of the paper roll. The initial air pressure of the movable friction plate 7 is set according to the paper and printing tension requirements. During paper roll unwinding, if the tension changes, the position of the floating roller (see (c) in the figure) changes, driving the sensor 9 to rotate by an angle and send a feedback signal. This adjusts the air pressure of the movable friction plate 7, changing the friction force between the movable friction plate 7 and the brake disc 5, thereby changing the web tension to ensure stable tension. If greater braking force is required, the fixed friction plate 8 can be adjusted to contact the brake disc 5. In the event of paper breakage or emergency stop, the air pressure is urgently increased, causing the friction plates to lock the brake disc 5 to prevent the paper roll from piling up due to inertia.

COMINTEC Brake Characteristics and Applications

Due to their simple structure, stable operation, easy installation, noiseless operation, good linearity, no no-load torque, fast heat dissipation, light weight, easy adjustment, and high temperature resistance under high load, pneumatic brakes are widely used in various industrial mechanical transmission systems, including wire and cable equipment, packaging machinery, printing machinery, textile machinery, wire and cable machinery, winding machines, and machine tool equipment. Pneumatic brakes can perform functions such as disengagement, engagement, inching, reversing, and speed changing. They operate at DC24V voltage, and the voltage fluctuation must not exceed ±5% of the rated voltage. The friction surfaces must not be contaminated with any oil stains or debris that could affect the normal operation of the disc brake. When installing the air-operated disc brake, axial positioning should be performed, the air gap should be adjusted to the specified value, and for split shaft installation, the coaxiality should be maintained within 0.1mm to ensure normal operation and characteristics of the pneumatic brake. Compared with drum brakes, disc brakes have flat working surfaces with heat transfer on both sides. The disc rotates and cools easily, is less prone to significant deformation, and provides stable braking performance. After prolonged use, the brake disc expands due to high temperature, enhancing the braking effect. In contrast, drum brakes transfer heat on a single surface, resulting in a large temperature difference between the inner and outer surfaces, which makes the brake drum prone to deformation. Additionally, after prolonged braking, the brake drum expands due to heat, reducing braking efficiency. Furthermore, disc brakes have a simple structure, are easy to maintain, and facilitate automatic adjustment of the braking gap. Pneumatic brakes are widely used as actuators in mechanical transmission systems of machine tools, motors, packaging machinery, printing machinery, paper machinery, textile machinery, office equipment, metallurgical machinery, tobacco machinery, automated production equipment, and woodworking machinery to perform functions such as clutching, reversing, speed changing, braking, and positioning.

COMINTEC Brake Maintenance Methods

To ensure uninterrupted operation of the electromagnetic brake, regular maintenance and care are required: 1) Regularly add lubricant to the moving parts of the electromagnetic brake. 2) Regularly check the length of the armature stroke. During the operation of the brake, the armature stroke length will increase due to wear on the braking surface. When the armature stroke length does not reach the normal value, it must be adjusted to restore the minimum gap between the braking surface and the rotor. If the armature stroke length increases beyond the normal value, the suction force may be significantly reduced. 3) If worn braking surfaces are replaced, the minimum gap between the braking surface and the rotor should be readjusted appropriately. 4) Regularly check the tightness of bolts, especially tightening the bolts of the electromagnet, the bolts between the electromagnet and the housing, the yoke bolts, the electromagnet coil bolts, and the wiring bolts. 5) Regularly check the mechanical wear of moving parts and remove dust, lint, and dirt from the surface of the electromagnet components.

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