What is Injection Molding with Acrylic?

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ICOMold is experienced in using acrylic and other thermoplastics for injection molding manufacturing. We work closely with our customers to ensure they have the best material for their project in order to achieve a high-quality part. Our acrylic injection molded parts are made at high speeds, high volumes and with great efficiency. ICOMold is ready to work with you on your next injection molding acrylic project. 

Acrylic (polymethyl methacrylate PMMA), sometimes called plexiglass, is a thermoplastic homopolymer which is often used as an impactresistant replacement for glass. The light transmittance of acrylic is 92%, which is similar to optical quality glass. Acrylic is UV resistant, light resistant and will not fade. It is ten times more impact resistant than glassThere are numerous benefits to using acrylic for injection molding manufacturing including dimensional stability and affordability. Common acrylic applications include lenses, medical devices, screens, furniture, paint, beauty products and more. 

Advantages of Injection Molding Acrylic

Acrylic has a number of advantages when used in the injection molding process. Some of the main benefits of using acrylic for your injection molding project include:

  • Dimensional stability
  • Weatherabilty 
  • Hardness 
  • Impact resistance 
  • Non-toxic composition 
  • Transparency 
  • Anti-fogging 
  • UV filtering 
  • Shatter resistance 
  • Lightweight 
  • Affordable 

Working with acrylic presents a few challenges that are common amongst other plastics. First, acrylic products have lower heat resistance. They have less strength than injection molded parts made of metal. It is important to keep these in mind when selecting the right material for your unique project.  

Injection Molding Acrylic Specifications 

Acrylic is a thermoplastic that can be heated to its melting point, cooled down and then reheated without degradation—acrylic’s ability to be liquified means that it is suitable for injection molding and recycling. Acrylic is scratch resistant and a much lighter alternative to glass. It is a great fit when a project requires transparency, tight tolerances, consistency and complexity. Properties of acrylic:

  • Melting Point266°F
  • Tensile Strength8,000-10,000 psi 
  • Injection Mold Temperature: 175-225°F 
  • Flexural Strength: 13000 psi 
  • Shrink Rate: 0.2-1% 

Injection Molding Acrylic Process

To begin the injection molding process, the acrylic is heated into a liquid form. It is then added to a two-sided mold to create the desired shape. Once the item has cooled, it is released from the mold and then moved into postprocessing for finishing touches. The advantage of using injection molding for your acrylic part is that once the tool has been made, it can be used over and over again, producing a large volume of uniform, high-quality acrylic products. This leads to significant cost savings over time. 

Applications of Injection Molding Acrylic

Acrylic is often used when a glass-like quality, resistance to fading and scratch resistance are desired. Some common applications of acrylic include:

  • Lenses
  • Glass replacement 
  • Skylights 
  • Beauty products 
  • Paint 
  • Food storage containers 
  • Refrigerator parts 
  • Fashion products 
  • Signs and displays 
  • Plexiglass 
  • Automotive
  • Consumer electronics 
  • Building materials

Get a Quote on Injection Molding Acrylic Today 

ICOMold can work with you on the design and production of your acrylic part. Get an instant quote today.  

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