The company has installed two new plastic injection moulding machines at its Durham Lane site, which use robotics technology and computer design to produce components for use in the medical, construction, defence and automotive industries.
In addition, Icon Plastics has appointed a new operations manager and three line operators meaning it now employs a workforce of 56.
Operations director at Icon Plastics, Phil Walker, said: "Over the last 12 months, we have invested more than £400,000 so that we can continue to accommodate our recent contract wins.
"The new Negribossi machines are a major upgrade for Icon. They are more accurate and efficient than our previous machines thanks to their synchronous motors, technology more often seen in industrial robots.
"This means we are more productive than ever, allowing us to increase our client base, expand our workforce and future-proof the business."