Polyester film, also known as "biaxially stretched polyester film", has been widely used in packaging, electronic processing, such as printed circuit boards, touch switch base films, bronzing films and pad printing films due to its excellent overall performance. Among the products in the electrical and printing industries. With the establishment of sound regulations in food and medical industries, polyester film is facing wider application challenges while being widely used: improving the quality of the film requires not only high purity but also zero surface. defect. In order to ensure product quality and ensure continuity of production, more and more manufacturers are beginning to apply metal detection and separation technology at various stages of production. With the increasingly fierce competition in the industry, the use of metal detection technology in production to increase productivity and ensure film quality has become a trend.
Guarantee raw material purity
In order to obtain high-quality polyester film, the first consideration is of course the source of the production - the raw material of the product. In the production process, the plastic raw materials are required to be pure, the impurity content is small, and there is no dust, especially no metal impurities. Because the presence of metal impurities greatly affects the melting point and viscosity stability of the plastic raw materials, and thus has a great impact on the subsequent processing of the raw materials. At present, from the perspective of environmental protection and economic interests, more and more manufacturers are beginning to mix a certain proportion of self-produced crushing materials in raw materials, and the direct consequence of this practice is that the probability of metal existence is also greatly increase. Therefore, to ensure the purity of the raw materials, it is necessary to carry out metal detection before the raw materials enter the next process.
Figure 1 S+S's MFE metal separator can be installed directly above the inlet of the extruder, avoiding the possibility of metal impurities entering the extruder during the conveying process, thus ensuring smooth production based on the above reasons, Germany Shuangshi Sorting Technology Co., Ltd. (hereinafter referred to as "S+S Company") has launched its economical RAPID COMPACT metal separator. Unlike iron separators, metal separators remove all metal impurities such as iron, copper and stainless steel. Once metal impurities are found, the metal separator will immediately initiate the reject flap to automatically separate the contaminated material.
Protect equipment to ensure continuous production
In addition to pure raw materials, quality equipment is one of the essential conditions for producing high quality films. Take the three-layer coextrusion biaxially oriented polyester film production line from Bruckner, Germany. The production line continuously supplies raw materials in a streamlined operation mode. In order to ensure smooth production, it is necessary to ensure that the supply cannot be interrupted and the extruder is operated normally. Good maintenance is necessary for the equipment. Because the entry of metallic impurities is very likely to damage the screw and the barrel. And once the equipment is damaged, not only is the maintenance cost expensive, but the production loss during the downtime is also incalculable.
The MFE metal separator for the extruder is designed by S+S for this application. The device can be installed directly above the inlet of the extruder, avoiding the possibility of metal impurities generated during the conveying process entering the extruder, especially for full-tube blanking applications. Compared with the RAPID COMPACT series, the detection accuracy of this equipment is higher, and the rejection mechanism is specially designed to smoothly complete the task of removing metal impurities without affecting the continuous supply of material flow, so it does not affect at all. Coherence in production.
Figure 3 S+S's metal detector is directly installed at the front end of the pulverizer to detect metal impurities in the recovered waste and protect the pulverizer from recycling and pulverizing system.
In many cases, defective or scrap produced in production will be recycled and recycled for production. However, since the storage location of the waste is usually confusing, the recycled scrap often incorporates large metal impurities such as nuts or screws to destroy the blades of the pulverizer. Therefore, it is also necessary to carry out metal detection of defective products and waste products before recycling. To this end, S+S has introduced channel-type metal detectors specifically for this application. The device is directly installed at the front end of the pulverizer. When the metal is detected, it will automatically alarm and stop, so that the metal can be manually picked up or equipped with different culling mechanisms for automatic separation.
vape disposable,vape device for vaping,vape device for smoking,smok vape pen plus,smok vape pen plus
Shenzhen Aierbaita Technology Co., Ltd. , https://www.aierbaitavape.com