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Classification of Blow Moulding Machines: An Overview

Views: 0     Author: Site Editor     Publish Time: 2023-07-02      Origin: Site

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Blow moulding machines are widely utilized in the manufacturing industry to produce hollow plastic objects of various shapes and sizes. These machines play a crucial role in mass production, delivering efficiency and cost-effectiveness. 

ibc tank blow molding machines

In this article, we will explore the classification of blow moulding machines based on different criteria, providing valuable insights into their distinctive features and applications.


1. Classification Based on Machine Design:

a. Continuous Extrusion Blow Moulding (EBM):

  EBM machines are commonly used for high-volume production of bottles, containers, and drums. They comprise an extruder that continuously extrudes a molten plastic tube (parison) which is captured by a moving moulding unit. The process involves simultaneous extrusion, moulding, and product ejection, ensuring a continuous operation.


b. Accumulator Head Blow Moulding:

  Accumulator Head machines are suitable for manufacturing large-sized containers, such as automotive fuel tanks and industrial storage tanks. These machines employ an accumulator to accumulate a specified volume of melted plastic, which is then extruded into the mould cavity. This method allows for uniform wall thickness and the production of complex shapes.


c. Injection Blow Moulding (IBM):

  IBM machines differ from other types as they combine both injection moulding and blow moulding techniques. They are commonly used to create small-sized bottles, pharmaceutical containers, and medical devices. The process begins with an injection moulding step, producing a preform (a particular shape). The preform is then transferred to the blow moulding unit where it is reheated, stretched, and blown into the final shape.


2. Classification Based on Production Process:

a. Single-Stage Blow Moulding:

  Single-stage blow moulding machines integrate the preform injection and blow moulding processes into a single machine. This process is time-efficient, as the production steps occur without requiring the intermediate storage of preforms. Single-stage machines are commonly used for the production of PET bottles and jars for beverages and personal care products.


b. Two-Stage Blow Moulding:

  Two-stage blow moulding machines separate the injection moulding and blow moulding processes into two different machines. Initially, preforms are created using an injection moulding machine. These preforms are then sent to a separate blow moulding machine for reheating, stretching, and blowing into the final product shape. Two-stage blow moulding is beneficial for high volume-production and allows for greater flexibility in product design and size variation.


3. Classification Based on Material:

a. Extrusion Blow Moulding (EBM):

  EBM machines are primarily used for processing materials such as polyethylene (PE) and polypropylene (PP). These materials have excellent toughness and a wide range of applications in industries like packaging, automotive, and consumer goods.


b. Injection Blow Moulding (IBM):

  IBM machines work with materials such as polyethylene terephthalate (PET), which is a common choice for producing bottles and containers due to its clarity, strength, and recyclability.


Conclusion:

Blow moulding machines are classified based on machine design, production process, and the materials they process. Each type holds its own advantages and is suited for specific applications. Understanding the different classifications helps manufacturers choose the right machine for their production needs, ensuring optimal performance, productivity, and product quality. With ongoing advancements in technology, the blow moulding industry continues to evolve, offering innovative solutions and expanding its capabilities.


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