In the molding process of plastic products, due to different processing equipment, different molding methods, a wide variety of raw materials, combined with the operation of equipment, mold cavity structure, rheological properties of materials and other factors, the internal and external quality of plastic products will produce a variety of molding defects. For plastic engineers, how to adjust process parameters and set molding conditions reasonably, how to adjust mold correctly and quickly eliminate various molding faults is a practical technology that should be mastered. However, there are many reasons for product defects, and the cause mechanism is relatively complex. It is often required that the troubleshooting personnel must have certain theoretical knowledge and rich practical experience, so as to correctly analyze the causes of defects, determine the appropriate treatment scheme, and eliminate all kinds of plastic processing faults skillfully. This paper makes a list analysis on the causes and troubleshooting methods of a large number of plastic processing faults. Through induction, extraction and summary, the causes and troubleshooting steps and methods of more than 1000 plastic molding processing faults are analyzed and elaborated, and some targeted solutions and measures are provided for plastic engineering It can greatly shorten the process of troubleshooting and the time of searching for Countermeasures in the vast literature. In this paper, when discussing the causes and troubleshooting of a fault, it often involves various causes and countermeasures. Although the list should be arranged according to the primary and secondary order of the causes of the failure, when formulating the troubleshooting scheme, it is not necessary to mechanically apply the sequence of the list, but to adjust the process, equipment and model according to the table According to the principle from easy to difficult and from low to high, the economic and reasonable treatment scheme is determined according to the principle of from easy to difficult and from low to high with equal molding conditions. It should be noted that the process parameters must be adjusted one by one when troubleshooting, and several production conditions should not be changed at the same time. For example, it is forbidden to change many process parameters such as molding temperature, molding pressure or mold cavity structure at the same time. Instead, the production conditions at the time of failure should be stabilized temporarily. First, the main cause of the failure should be eliminated. Then, according to the change of the fault, other steps should be adjusted in turn until the fault is completely eliminated. It should also be noted that sometimes different molding faults of the same kind of products have the same causes and troubleshooting methods. In this regard, in order to avoid repetition in the list, this article generally describes the cause mechanism and Countermeasures in the earlier fault items, and only makes a brief introduction in the later ones. Therefore, before determining a troubleshooting scheme, it is better to refer to the causes and troubleshooting methods of the fault under other molding conditions, and then determine the comprehensive treatment scheme. In addition, some of the molding faults listed in this article are old-fashioned, but considering that many domestic manufacturers are still using these molding processes, in order to help them improve the product quality, they are listed together.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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