Blow Molding & Injection Molding: Main Advantages & Differences

hdpe pvc molding machine

Injection molding is a manufacturing process for producing different plastic parts by injecting molten material into a mold. The plastic injection and blow molding process are reliable methods to manufacture the best quality products. These are the two most popular ways to obtain high-quality, cost-effective plastic parts and products. However, both have different approaches, techniques, and applications. In these processes, PVC and HDPE molding machines are the main manufacturing equipment. 

The Difference in Process: Injection Molding and Blow Molding:

In the case of injection molding, the injection of melted resin takes place in a hollow mold until it is completely filled. After this, it is important to apply intense pressure to hold the injection mold together for every part of the interior to be filled with high-pressure molten plastic resin. The ton of pressure applied determines the size and the cost of the PVC molding machine.

With blow molding, you need to heat a plastic tube and fill it with air until it essentially becomes a balloon of hot plastic. You then need to clamp a mold around this, trapping the plastic while air continues to fill the parison into the shape of your part. The weight of the plastic used in the mold determines the size and associated costs.

Advantages Of Plastic Injection Molding:

  • Faster Rate Of Production: The process is highly efficient and extremely fast.  Speed depends on the complexity and size of the mold and only about 15-120 seconds pass between each cycle time. Thus in a short time span, it is easier to produce a greater quality mold within each cycle. This further increases possible revenue and profit margins.

  • Complex Part Design: Injection molding can handle extremely complex parts, and maintain uniformity. Also, it has the ability to make exactly identical parts. It is important to optimize the effectiveness of high-volume injection molding and maximize precision.

Advantages Of Blow Molding:

  • Multiple Production Methods: This princess creates different methods of blow molding to produce final products. This technology keeps on developing to improve these production methods by tweaking design flaws if any.

  • Low Cost: The extrusion blow molding process uses low pressure which implies low machine cost. Thus, it will become easier and more cost-efficient to mold external threads.

Priti International has a specialization in manufacturing PVC molding machines and HDPE molding machines. Their incredible range of products has become famous among some of the leading industries for their impeccable productivity and also, performance. With the help of this machine, you can design extremely complex parts, the rate of production also increases, and most importantly they are flexible enough to help you choose the correct color for your plastic parts.