The standing, naming, and posture of injection molding service products, the injection life cycle of waterproof plastic materials for standing, chassis, the overall damage of locking holes and plastic components, the production capacity of finished products, the complexity of mold production product design, the diversity of locking holes and plastic components, the corrosion resistance and uniformity of locking holes and bottle caps, as well as the considerations of inter molding, production scale, production name, specification parameters, etc. Injection molded parts are also an important component of injection molding materials, mold structures, and plastic material properties. Consideration of injection materials, quantity of Injection mold construction plastic materials and mold materials, quantity of plastic part production lines and mold materials, distribution of plastic products, and operation of injection molding machines. The number of injection materials, Injection mold construction plastic materials and molds, the difficulty of Injection mold construction plastic materials and mold design, the level of product quality, the determination of Injection mold construction plastic materials and the types of injection materials, Injection mold construction plastic materials and mold processing methods, and other considerations. The selection of mold materials, the design of Injection mold construction plastic materials and mold structure, the mold gating system mode, the design of cooling system, etc. (1) The characteristics of product appearance, wall thickness, and injection molding machine gun barrel with protective cover. (2) The characteristics of adding a cover to the material barrel of an injection molding machine. During molding, accumulated heat is generated between the molten plastic and the mold cavity, causing shrinkage, orientation, or simultaneous formation of the plastic part. Due to the characteristics of the injection molding machine barrel with a cover, the temperature of the polymer should be measured, which is generally divided into three types. One type refers to the polymer with a temperature higher or lower than the temperature and the polymer with a temperature higher or lower than the temperature. Two types refer to polymers with temperatures above or below temperature, such as crystalline polymers, PET (polyethylene), polypropylene, etc. Generally, large transparent products or workpieces that require transparent product molding can be easily demolded using nozzles, imitation red, light guide tubes, light guide plates, and polishing ball pens. Three types refer to polymers with temperatures above or below temperature, such as PP, ABS, PMMA, PC, PA, etc. The material barrel is made of special alloy material, and there is a special injection molding material barrel design to meet the injection molding needs of different materials. Four types refer to the temperature of the material barrel being higher than the average co melt injection plastic barrel, generally using injection molding that is higher than co melt injection molding or lower than the rated plasticization level. Five types refer to polymer cylinders with a weight lower than or below a certain plasticization level, such as polypropylene, polyethylene, polypropylene, polystyrene, polyester, polypropylene, polyvinylidene chloride, etc. The material barrel is generally made of special alloy or non moderate co melt injection plastic. The special alloy cylinder has a special injection molding cylinder design in terms of technology, and a special injection molding cylinder is designed in the inner hole of the cylinder. The material barrel is generally made of high-precision alloy materials, such as HRCALG, polyester, COC, and other resin material barrels. The injection molded parts of the material barrel are rough, with high levels of color and gloss, integrity, gloss, and hygiene. The material barrel uses special alloy or non moderately plasticized material barrels, which are suitable for injection molding of different plastic raw materials.