Advantages of blow molding:
  • Make hollow parts
  • Fast production rates 
  • Ability to mold complex parts 
  • Minimal post-processing

What is Blow Molding?

Blow molding is a manufacturing process for creating hollow plastic parts and containers. It is a versatile, cost-effective method for producing a wide range of plastic products – from bottles and containers to automotive components and toys.

The key steps involved in the blow molding process include: 

  1. Raw material in granular form is heated to melt the granules and disperse any colorant added to produce a specific color of plastic. 
  2. A molten plastic tube is extruded from the machine head, cut with a hot blade, and then captured by a water-cooled mold.
  3. A blowing tube is inserted into the mold, allowing pressurized air to blow into the plastic, forcing it to take the shape of the mold.
  4. Once cooled and solidified, the mold opens, and the shaped plastic is ejected. From there, the plastic travels to remove any excess from the design.
  5. In some processes, this excess is then conveyed to the beginning of the process, to be ground and reused, wasting almost nothing. This is known as a close-looped system. 

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The benefits of blow molding include:

  • Lightweight 
  • Seamless and Leak-Proof 
  • Materials Variety 
  • Quick Tooling Changes 
  • Short Lead Times 
  • Minimal Post-Processing 
  • Handles can be incorporated into the design. 

Markets served by blow molding:

  • Packaging  
  • Material handling 
  • Manufacturing 
  • Lawn and garden 
  • recreational vehicles 
  • commercial truck parts and products 
  • outdoor consumer products 
  • industrial and business equipment 
Common Materials Used:
  • Acrylonitrile Butadiene Styrene (ABS) 
  • High-Density Polyethylene (HDPE) 
  • Low-Density Polyethylene (LDPE) 
  • Polypropylene (PP) 
  • Polystyrene (PS) 
  • Polyurethane (PU) 
  • Santoprene 
  • Kostrate 
  • K-Resin Styrene-Butadiene Copolymer (K-Resin SBC) 
  • Two facilities minutes apart in the Buffalo/Niagara area 
  • Facilities account for 215,000 sq. ft of factory, office, and warehousing 
  • Possess some of the largest blow molding machines in the world – including one that extrudes 145 pounds of material and has a press almost 15 feet in height 
  • Twenty blow molding lines 
  • Capacity and capability to produce parts weighing just under one pound up to 100 pounds 
  • Our location places us within 500 miles of 46% of the US population and 57% of the Canadian population 

What we offer

With over 60 years of experience in both prototype and production blow molding, we bring a depth of knowledge to early-part design feedback, material options, and tooling solutions.