Safety issues with the open mill
The open mill is one of the equipment with the highest incidence of work-related accidents during the rubber mixing process. Its working environment is relatively high compared to other mixing equipment, which increases its risk factor. Operators often come into contact with materials and rollers when operating the equipment. Most work-related accidents occur when the operator is carried into the roller by materials. So, in order to ensure the personal safety of engineers and operators, safety knowledge training and a high safety equipment are essential.
Traditional open mills are mostly driven by chains, and their biggest problem is that if employees encounter accidents during operation, the machine will be powered off for protection. However, after a simple power outage, the two rollers of the machine will continue to rotate in the inertia process, or a holding brake system will be used, which still puts employees in a continuous injury situation and is very difficult to handle. Minor safety accidents that occur on the open mill can result in crushing injuries to the hands, while severe accidents can endanger the entire arm or even life.
Lina Machinery has long been committed to the research and development of equipment, and the safety issues that exist in the open mill are the focus of Lina Machinery's attention. Combined with technologies from Germany, Japan, and other countries, Lina Machinery has further developed and obtained multiple patented technologies. According to the natural reaction of the human body, safety devices are installed in various aspects of the open mill. When the operator is about to clamp their hands into the open mill, our safety devices will be touched due to the spontaneous combustion reaction of the human body. At this time, the open mill will immediately issue two commands: first, stop moving without inertia immediately, and second, immediately reverse by a quarter circle. Even if there is slight finger clamping, it will be poured out. The large open mill is designed with a belly touch switch, which can be adjusted according to the height and arm length of the human body. This allows the operator to only touch the working surface of the roller during operation. If the operator is pulled by the roller, they will touch this safety switch and immediately stop and reverse.
Personal safety is more important than anything else, and ensuring that employees work in a safe working environment is the most basic equipment requirement for LiNa.
The problem of non wear resistance in the open mill
Some customers have said, "Our previous open mill felt that the gaps between the rollers became larger and couldn't be closed after using it for a long time, and the thin pass effect was not good. Will your company experience this phenomenon?" Some customers have also said, "The rollers in the factory's open mill have a curvature after using it for a long time, with both sides being tight and the middle being loose. Will your company experience this?" Some customers have also raised questions, "Our rubber material is relatively hard, and some open mills may have short rollers. Will your company
Based on the feedback from many customers regarding the common problems with the roller of the open mill, the answer given by Lina Machinery is that it is a problem with the material and precision processing of the roller. The weak wear resistance of the roller causes serious wear and tear after prolonged use, and the insufficient hardness of the roller leads to the phenomenon of roller arcing. The toughness of the roller is insufficient, resulting in short stick phenomenon. To solve these problems, the material of the roller is the core, which is one of the key factors determining its toughness and hardness. Deep surface treatment for 72+72 hours is also an important factor determining its wear resistance.
The problem of high energy consumption in the open mill
Some customers have raised concerns about why using your own open mill of the same model can save more electricity than buying from another company before. This issue was raised by company engineers after returning to China for study in 2002. With the gradual increase in industrial electricity costs, reducing energy consumption will allow customers to save production costs, which will enable the company's equipment to occupy a wider market.
After two years of improvement, the first generation of new open mill was launched. In fact, there are three main reasons for the high energy consumption. The first reason is insufficient torque, when the torque is insufficient, the motor needs to be increased to increase the torque. The second reason is that energy is quickly lost during the conversion process, causing unnecessary energy waste. The third reason is that the machine transmission and support structure cause resistance, resulting in increased energy loss.
When the three main reasons were combined to solve them, the first generation of new Lina open refining machine emerged
Up to now, Lina has launched the fourth generation of its open mill, which reduces energy consumption by more than 30% compared to traditional open mills (depending on the material). The Lina Kai refining machine adopts customized accessories to minimize energy loss during the process of converting high speed into low speed and high torque. The speed ratio gear adopts hard tooth surface helical teeth, which tightly bite and reduce noise while transmitting stable energy.
Your question is the problem we want to solve, and we welcome your suggestions for us.
Low precision problem of open mill
The open mill is mainly used for mixing and dispensing rubber materials. Pre formed dispensing requires high precision and cannot exhibit phenomena such as pole effect or unevenness on both sides. Uneven dispensing will cause uneven thickness of the material after molding, resulting in unnecessary waste.
The main reason for the low accuracy of the open mill is the support shaft of the roller, and the accuracy and material of the roller will also affect the accuracy of the screw.
Lina Machinery adopts manual digital display for precision issues, and the precision requirements for roller production are extremely strict. Before leaving the factory, it will undergo various tests for 72 hours. At the same time, the use of SKF bearings has better accuracy and lifespan than ordinary bearings. However, traditional open mill nylon or copper sleeves belong to early roller support accessories, which will cause center distance deviation after wear and tear. This is a complete loss of accuracy requirements and will have a great impact on mixing. At this time, major repairs are needed, resulting in significant cost waste. If the service life is longer, there will be no maintenance value.
High noise problem of open mill
According to a survey conducted by 152 experts on 100000 people, general factory employees who are continuously exposed to noise levels above 90dB for a long time can suffer from hearing loss; Noise levels above 85dB can cause hearing impairment after 8 hours. If the noise frequency is above 1000Hz, it can cause temporary hearing impairment. If the noise frequency is between 4000-6000Hz, long-term exposure can cause permanent hearing impairment.
Under high-frequency noise, exceeding the tolerance limit of the auditory organ, it can cause pain in the ears, making people disgusted, impatient, inefficient, and prone to symptoms such as irritability, restlessness, loss of appetite, and indigestion.
The traditional open mill produces a lot of noise during operation, like a train passing by, making the working environment for workers harsh. Most customers have reported that the company is using traditional open mills, making it increasingly difficult to find operators, especially young employees.
Lina Machinery addresses the issue of noise and combines the human body's adaptability to sound to perform noise reduction treatment throughout the entire process from the motor, reducer, roller support to the transmission device. Its reducer is customized by Guomao to increase its service life while reducing noise. During the operation of the small open mill, there is only 30db.
The problems encountered by customers will be the ones that Lina Machinery is committed to solving.
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