Extrusion blow molding is a method of making hollow thermoplastic parts. Well-known blow molding objects are bottles, buckets, cans, boxes, and all containers that package food, beverages, cosmetics, medicines, and daily necessities. Large blow molding containers are commonly used in the packaging of chemical products, lubricants and bulk materials. Other blow molded products include balls, bellows and toys. For the automotive industry, fuel tanks, car shock absorbers, seat backs, center brackets, and armrests and headrest covers are blow molded. For machinery and furniture manufacturing, blow molded parts are shells, door frames, frames, clay POTS, or boxes with an open side.
A more common blow-extruded plastic material is high-density polyethylene, the polymer used in most milk bottles. Other polyolefins are also often processed by blow molding. Depending on the use, styrene polymers, polyvinyl chloride, polyester, polyurethane, polycarbonate and other thermoplastics can also be used for blow molding. Kunshan blow molding processing
Engineering plastics have recently been widely accepted in the automotive industry. Material selection is based on mechanical strength, weather resistance, electrical properties, optical properties and other properties.
technology
Three quarters of blow molding products are made by extrusion blow molding. Extrusion is the process of forcing material through a hole or mold to make a product.
Extrusion blow molding process consists of 5 steps: 1. Plastic embryo (extrusion of hollow plastic tube); 2. Close the flap mold on the mold, clamp the mold and cut off the mold; 3. Blow to the cold wall of the mold cavity, adjust the opening and maintain a certain pressure during cooling; 4. Open the mold and remove the blown parts; 5. Trim the flash to get the finished product. Suzhou blow molding processing
Extrusion molding
Polymer mixing is defined as a process by which a polymer or polymer system is upgraded through melt mixing. The mixing process has a wide range from the addition of a single additive to multiple additive treatments, polymer alloys and reactive mixing. It is estimated that one-third of polymer production in the United States goes through blending. The mix can be customized according to the performance requirements of the final application. Mixed products have mixed properties, such as high gloss and excellent impact strength, or precision molding and good stiffness.
The blended polymer is usually cut into pieces for further processing. However, there is growing industry interest in combining mixing with further processes, such as profile extrusion, to avoid reheating the polymer.
mixed
Various types of melt mixing equipment are used, from roller mixers and batch mixers to single and twin screw extruders. Continuous mixing (extruder) is the most commonly used equipment because it provides a consistent quality product and reduces operating costs. There are two types of mixing: Distributed mixing materials are distributed uniformly in the mix without the need for high shear stress. This type of mixture is called extensional mixing or laminar mixing.
Distributed mixing is also called strong mixing, in which high shear stresses are applied to break up cohesive solids. For example, when additive pellets are broken, the actual particle size is reduced.
Mixing operations often require two mixing types in one process.
Kunshan Fulong Plastic Hardware Co., Ltd. is a professional committed to blow molding processing, sales of manufacturers. The company sells a large number of blow molding products all year round, with a wide variety of products. Welcome new and old customers to come to consult and buy.
