Application of Safety Light Curtains on Press Machines

Application of Safety Light Curtains on Press Machines

1. Introduction

Press machines, as commonly used equipment in industrial production, play an important role in many fields such as metal processing and plastic product molding. However, there are significant safety risks during the operation of press machines. If operators accidentally insert their hands or other body parts into dangerous areas, serious safety accidents can easily occur. Safety light curtains, as an advanced safety protection device, can effectively reduce safety risks during press machine operation and provide reliable safety assurance for operators.

2. Description of Practical Application Scenarios

(1) Installation Layout

Safety light curtains usually consist of a transmitter and a receiver, installed at the edges of the dangerous areas of the press machine, such as the mold's feeding and discharging ports. The transmitter and receiver correspond to each other, forming a dense network of infrared beams covering the entire hazardous operation area. During installation, it is necessary to ensure the height, angle, and position of the light curtain are accurate to guarantee the beams fully and precisely cover the danger zone without obstructing the normal operation of the press machine.

(2) Normal Operating State

When the press machine is running normally and no object enters the detection area of the safety light curtain, the infrared beams emitted by the transmitter can be smoothly received by the receiver. At this time, the safety light curtain is in normal working condition, and the press machine can perform stamping operations according to the preset program. During this process, the safety light curtain continuously monitors the hazardous area, providing ongoing safety protection for the operator.

(3) Safety Protection Implementation Process

Once an object (such as an operator's hand or body) enters the detection area of the safety light curtain, some infrared beams will be blocked, and the receiver will not receive the corresponding beam signals. Upon detecting this beam obstruction, the safety light curtain immediately transmits a signal to the press machine's control system.

After receiving the signal from the safety light curtain, the press machine's control system reacts quickly by immediately stopping the stamping action. For example, the descending slide will stop immediately and hold its position to avoid injuring the object in the danger zone. At the same time, the safety light curtain will trigger corresponding alarm devices, such as audible and visual alarms, to alert the operator to pay attention to safety.

(4) Resuming Normal Operation

When the operator removes the object from the detection area of the safety light curtain, the infrared beams resume normal transmission, and the receiver receives the complete beam signals again. The safety light curtain feeds this signal back to the press machine control system. After confirming the danger is cleared, the operator can press the reset button on the control panel to restore the press machine to normal operation and continue stamping work.

3. ENT Advantages of Safety Light Curtains Applied on Press Machines

(1) High Sensitivity

ENT Safety light curtains can quickly and accurately detect the entry of small objects. Even small parts like an operator's finger entering the danger zone can promptly trigger the safety protection mechanism, effectively preventing safety accidents.

(2) Complete Certification

As the first domestic light curtain to simultaneously pass Cat.4、 PL e 、 Type 4 、 SIL 3 level certifications, the product possesses top-level safety performance in the industry. Top-level safety performance 。

(3) Easy Installation and Maintenance

The installation process of safety light curtains is relatively simple, requiring only fixing the transmitter and receiver in appropriate positions and performing simple adjustments. Meanwhile, maintenance costs are low, with only regular cleaning and inspection needed to ensure the light curtain surface is free of dirt and damage, guaranteeing normal operation.

(4) High Reliability

Safety light curtains have high stability and reliability, adopting advanced optical technology and signal processing algorithms, The light curtain sends signals internally to the press machine control system for emergency braking ≤20ms IP 。 rating reaches to effectively resist external interference such as dust, oil, light, electromagnetic interference, etc., ensuring normal operation in various complex industrial environments. IP65，能够有效抵抗外界干扰，如灰尘油污、光线、电磁干扰等，确保在各种复杂的工业环境下都能正常工作。

(5) Easy Installation and Maintenance

The installation process of safety light curtains is relatively simple, requiring only fixing the transmitter and receiver in appropriate positions and performing simple adjustments. Meanwhile, maintenance costs are low, with only regular cleaning and inspection needed to ensure the light curtain surface is free of dirt and damage, guaranteeing normal operation.

4. Summary

The four-level certification of safety light curtains is not the end but a new starting point for safety standards.

ENT The application of safety light curtains on press machines provides a reliable and efficient solution for the safe operation of press machines. By monitoring the hazardous areas of the press machine in real time and promptly detecting and preventing operators from entering dangerous zones, safety light curtains can effectively reduce the occurrence of safety accidents, protecting the life and health of operators. At the same time, their advantages such as high sensitivity, non-contact detection, high reliability, and ease of installation and maintenance also strongly support enterprises in improving production efficiency and reducing production costs.