Injection blow molding is a two-step process for producing plastic bottles. In the first step, the plastic is injection molded into a bottomed hollow parison. The bottle neck and the parison are formed when the plastic is injected around the core rod of the preform mold. In this step, the parison is subjected to temperature state adjustment. The parison is then transferred through a mandrel into a blow mold, and air is introduced through the core rod to blow the parison into the shape of the mold. After the bottle is formed, transfer to the discharge section. There are many advantages of injection blow molding: No scraps, accurate size, no secondary processing after the bottle is made. The weight accuracy of the finished bottle can be controlled in the soil. l grams. The shape of the bottle neck and the inside and outside of the bottle can be molded to an accuracy of 0.004 inches. The repeatability of the weight and size of the bottle is suitable for matching and is easy to connect to the filling line. Due to the biaxial orientation, the transparency and strength of a variety of different materials can be improved. The bottle in the discharge section is controlled in a certain direction so that automated online decoration and filling can be performed. The workload of the operator is small. equipment When producing a profitable plastic bottle using an existing injection blow molding machine, the size and shape of the bottle are limited. There are several types of injection blow molding machines available on the market, which differ in the way they transfer the core rod from one segment to the other, including the ribbed, two-segment (rotary), axially movable and three-stage And three or more rotating types. Today's three- or four-stage rotating machines are popular. This type of equipment can be divided into two categories: blow molding assembly, which can be installed on some industrial injection molding machines; and complete injection molding equipment with a plasticizer, hydraulics, controls and Other accessory parts. These devices can be further distinguished as: vertical reciprocating screw presses and horizontal reciprocating screw presses. The vertical type is much simpler than the reciprocating type. When the injection volume is the same at the same filling speed and lower injection pressure (if necessary), it has fewer parts, less energy consumption, less floor space, and easier maintenance. The reciprocating screw-type plastic mixer is mainly developed for injection molding; although its structure is more complicated than vertical, the reliability of operation is good. Current molding machines, including large standard production units, can produce larger bottles at higher production speeds; the perfect injection unit makes PVC and acrylic-containing resins easier to process; The development work is continuing. In general, the pharmaceutical industry and the cosmetics industry are the market for 16 squadrons and smaller injection blow molded plastic bottles. New materials specifically developed for this process have enabled injection blow molding plants to enter other markets. Polypropylene copolymers are easy to process, have good transparency, and are fast-formed, so they have actually replaced glass bottles with cough and cold medicines and mouthwashes. Other new resins are injection blown grade polyvinyl chloride homopolymers and polycarbonates. These crystal clear materials have been relatively easily machined on vertical screw machines and also processed on horizontal screw machines equipped with continuous plunger screws. The new streamlined manifold with improved acrylonitrile-containing resin and polyvinyl chloride resin has made multi-chamber operation a reality, even though these resins are heat sensitive. An 8-cavity mold has been successfully used for polyvinyl chloride processing, and several 12-cavity molds have been used in the production of acryl-containing resin bottles. Several companies are currently using 8-cavity molds to produce polyvinyl chloride bottles. The material of 01 is modified to reduce its heat sensitivity. It is now apparent that with larger machines, higher clamping pressures and larger platen areas will economically produce plastic bottles up to 4 liters. Accurate bottlenecks and the advantages of no scraps will gradually compensate for the higher cost of tooling. Due to the development of the machine (increasing the number of segments) and the innovation of the mold design, future development work will focus on the improvement of the orientation of the resin. Advances in mold design technology have enabled the manufacture of neck-necked plastic bottles and square-necked plastic bottles, which allow precise grooves on the bottom of the bottle and reduce the thickness of the entire bottle wall and shorten the production time. The development of mold design will enable injection blow molding to gradually enter the household chemicals, toys, especially the food container market. Shopping Bags,Cotton Tote Shopping Bag,Economical Cotton Tote Shopping Bag,Canvas Tote Shopping Bag Dongguan C.Y. RedApple Industrial Limited , https://www.zjhpgbags.com