Plastic Products Are Beneficial Produced Using Blow Molding or Stretch Injection

Many people use the internet to find plastic items and seek to contact manufacturers such as LLDPE granules suppliers and HDPE granules, among others. Blow molding is a manufacturing method in which soft plastic is inflated into a mold cavity with the help of compressed air. This procedure is used to manufacture a broad variety of thin-walled, hollow plastic objects that are often seen in everyday life, such as the following:

  • Dishwashers, washing machines, and ovens/stove parts are available.
  • Parts for automobiles (such as dashboard panels, exterior side panels, fuel tanks & more)
  • Toys and accessories for pets
  • Containers made of plastic
  • Aircraft and aviation components
  • Blow molding may be classified into several categories.

There are three forms of blow molding: extrusion blow molding, injection stretch blow molding, and injection blow molding. Extrusion blow molding is the most common type of blow molding.

Extrusion Blow Molding is a type of blow molding that is made by extruding metal into a mold

During the extrusion blow molding process, plastic is melted and shaped into a tube, which is referred to as a parison in the industry. The producer inflates the parison by blowing hot air into it, which causes it to deflate and form a hollow component in the shape of the mold. To prevent overheating of the plastic, it is removed from the mold and replaced with a fresh portion, which begins the process all over again. Jars, containers, and plastic bottles are just a few examples of objects that may be made using extrusion blow molding.

Injection Stretch Blow Molding 

To make perform, the injection stretch blow molding method follows the same processes like the injection blow molding process. Once the preform has been heated to the proper temperature, it is stretched and infused with air until it has taken on its final shape and size. After the component has cooled, it is subsequently discharged. Soft drink bottles, cooking oil containers, personal care product bottles, and chemical containers are just a few of the products that are commonly manufactured using injection stretch blow molding techniques.

Using Injection Blow Molding to Create a Product

The creation of a preform is the first step in the injection blow molding process. The plastic material is injected and molded into a heated chamber and onto a core pin during the manufacturing process. The cavity defines the outside shape of the component, whilst the core rod defines the inside shape of the preform (see illustration). When the preform is made, it is normally in the shape of a bottle or jar neck with an extensive quantity of polymer linked to the neck. Once the preform has been formed, it is transported to the blow station, where the core rod compresses air into it, forming the final shape of the preform. The portion is then allowed to cool before being expelled. When it comes to creating very small containers for hospitality samples and medications, this form of blow molding is frequently employed.

Products Made by Blow Molding

Extrusion blow molding has several advantages that make it particularly well suited for the production of a wide range of daily items.

These advantages are as follows:

  • Versatility
  • Durability
  • Customizability
  • Lightweight
  • Cost-effectiveness

These characteristics make extrusion blow molding an excellent choice for producing goods for a wide range of applications, including but not limited to:


 It is possible to manufacture dependable and long-lasting components for household appliances such as dishwashers, washing machines, and refrigerators using extrusion blow molding.

Toys for young children

 Plastic blow molding items may be produced in a broad variety of colors, making the method an excellent choice for the production of toys for children. Toy blocks, squeeze toys, toy vehicle shells, and play structures, among other things, maybe made using extrusion blow molding.

Components for automobiles Blow molding produces components that are dependable, cost-effective, and will not rust or corrode if handled properly. Vehicle parts such as fuel tanks, cooling system components, and pieces that contain fluid can be manufactured via extrusion blow molding.

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