Difference between Extrusion Blow Molding and Injection Blow Molding Extrusion blow molding and injection blow molding is widly used to produce hollow products with small and big size. Most engineers and manufacturers in plastic industry may know very well for the difference between extrusion blow molding and injection blow molding. They can check very fast for a bottle or product how it is made or how to produce the kind of plastic containers or products.But as a layman,most people may be confused for how a product is made. Here we will talk about how the find out the differece of the extrusion blow molding process and injection blow molding process. Extrusion Blow Molding Process Extrusion blow molding process is start from the material is melted and plasticized in the barrel. And then extruded from the head of the extruder with conventional downward tube.When the hube parison reaches a predetermined length, a section of tube embryo is intercepted and placed in the blow mold while still hot. The mould is closed catching and holding the neck end open and pinching the
Read more →Plastic Blow Moulding Process There are different plastic blow moulding process to make a bottle. But what kind of technology should be chosen depends on the characteristics required. What are the exactly molding process? Here we will explain more details about them and their characteristics and comparison. Plastic Injection Blow Molding Process Injection blow moulding process can be separated as injection moulding process and blow moulding process. 1. Injection moulding process: The injection molding is finished by an injection molding unit or machine. In this process we will produce a semi-finished product called preform or parison. Raw material is melt in a barrel and feed to the nozzles, injected to a injection mold, then we have the perform with kinds of bottle neck types. 2. Blow Moulding process: The blow molding is we put the performs or prisons to a blowing mold and use high pressure air to blow it up as a bottles or other hollowed containers. The injection blow moulding process is known as two steps injection blow molding and one step injection blow molding. Preforms whether cooled
Read more →Injection Stretch Blow Moulding Process Injection stretch blow moulding process is best known for manufacturing high quality and high clarity products. Exactly it`s PET water bottles. And of caused some other products are using the same molding process, like baby feeding bottles, outdoor drinking water bottles,cosmetic bottles,etc. The injection stretch blow molding process includes below 2 process: 1. Injection molding process: The raw material is heat and melt with a screw and barrel,and then injection to a preform injection mold. 2. Stretch and blow molding process: The preform is transferred to a blow mold before it`s cooled or reheated to the glass transition temperature for stretching, Then it was stretched in axial direction with a stretch rod, then release compressed air into the preform to force against the inside of the blowing mold, when it was cooled we have the mold shape products. Some people may be confused with the injection blow molding process and injection stretch blow molding process. Just noted there is only one different thing: stretching process. Injection stretch blow molding means the preforms must be stretched
Read more →Plastic Extrusion Blow Molding Process Extrusion blow moulding process is the largest and the earliest type of blow molding method. It is used to create hollow plastic products. It is suitable for the blow molding of polymers such as PE, PP, PVC, thermoplastic engineering plastics and thermoplastic elastomers, and various plastic blends. Used to produce packaging containers, storage tanks and other industrial parts. Extrusion blow molding process is start from the material is melted and plasticized in the barrel. And then extruded from the head of the extruder with conventional downward tube. When the hube parison reaches a predetermined length, a section of tube embryo is intercepted and placed in the blow mold while still hot. The mould is closed catching and holding the neck end open and pinching the bottom end closed. the compressed air blown into the parison through the air blowing nozzle The tube prison will be precisely inflated as the desired shape of the mold cavity. After the mould is completely cooled and then the mold can be opened to take out the product. Advantage and
Read more →Plastic Injection Blow Moulding Process Injection blow moulding process can be separated as injection moulding process and blow moulding process. 1. Injection moulding process: The injection molding is finished by an injection molding unit or machine. In this process we will produce a semi-finished product called preform or parison. Raw material is melt in a barrel and feed to the nozzles, injection to a injection mold, then we have the perform with kinds of bottle neck types. 2. Blow Moulding process: The blow molding is we put the performs or parisons to a blowing mold and use high pressure air to blow it up as a bottles or other hollowed containers. Now you know exactly two steps injection blow moulding process. And you can see we will need two main machines: injection molding machine and blow molding machine. It is a bit comples to produce a bottle or container but running very fast and have huge output capacity. This two step injection molding process is mostly use for PET bottles and containers manufacturing (Water bottles, soft drink bottles, edible oil
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