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Our series of articles have covered each aspect of design for plastic injection moulding. Our in-house designers have over 35 years’ experience and can impart the experience and knowledge to benefit your project. Our team can ensure your design is not only 100% suitable to the desired purpose but that you explore cost saving options along the way. To recap on our Design Guidelines series, we have summaries some key points below:  

  • Work with a specialist injection moulder from the point of design to avoid unexpected costs further along the process. It is far more cost effective to make changes during the design phase than any other injection moulding phase.
  • Remember to keep the end-use requirements in the forefront of your mind when designing, this will ensure you do not lose sight of the specific characteristics or functionalities needed.
  • Don’t overlook the importance of finished appearance and design to best eradicate surface defects. 
  • Consider coring, drafts, wall thickness, ribs, bosses, undercuts and part radii when designing to produce an all round robust product. 
  • Think about the desired life expectancy of the part and how to increase part longevity.
  • A hot topic, plastic recyclability – can your part be easily recycled?
  • Design to eliminate the need for assembly or reduce the assembly required for the part.
  • Design to reduce shrinkage and warpage
  • How to design to increase strength and give stiffness


CJ Tool & Mouldings are plastic injection moulders, offering a customer centred, personal approach. Our full range of plastic injection moulding services, includes design, tooling, moulding and assembly. We pride ourselves on delivering the best quality plastic products to meet our customers’ needs.

Based in the West Midlands and suppling plastic injection moulding services to customers throughout the UK, CJ Tool and Mouldings combine innovative technology with an experienced and passionate in-house team of specialists.

Offering a total solution for customers, we strive to build lasting partnerships to fully manage customers’ design, tooling, moulding and assembly requirements. With a strong focus on quality, service and value, CJ Tool & Mouldings are a dynamic and growing business, through the mantra of people, product and partnership.

Contact our team of specalists today to discuss your requirements. 


Get in touch today and talk to the specialists, click here.

Our team will be more than happy to help, advise and quote for your requirements.

Looking for more information? Check out our blog, News & Views for useful articles, tips and tricks on plastic injection moulding.