Technology

Co-extrusion Tooling FAQs

  1. Q: What are the key characteristics of materials that we can co-extrude?
  2. A: The material(s) must be capable of being pumped and the constituent particle size must be consistent with the parameters of the image required from the tool design.
  1. Q: Can we co-extrude more than two materials?
  2. A: Yes this is possible. Although we have not made a tool system above two materials we have the design parameters established.
  1. Q: How quickly can we make the system for a new design?
  2. A: The normal time from order to delivery/commissioning, of a two material system, is between 14 and 18 weeks dependant on the design complexity. For systems above two materials we would expect to need a further 4 weeks.
  1. Q: Can we achieve a '3 dimensional' product?
  2. A: This is dependant again on the materials and design. We have made a 21/2 design i.e. with a raised centre image using ice cream.
  1. Q: Do you need a complete system for each design?
  2. A: If the finished product dimensions are similar then the tools will be interchangeable, enabling 'in line' changes taking about 30 seconds.
  1. Q: What output rates can be achieved?
  2. A: As there are no moving parts the output speed is totally dependant on feed rates and down line handling systems.
  1. Q: Does the tool wear out?
  2. A: Abrasive materials will progressively wear the tool, even one made from sintered metal. The tool is guaranteed for 12 months and tools have lasted over three years.
  1. Q: What pressures can the tool withstand?
  2. A: Given that the materials in the tool are of similar viscosity then the pressures will balance each other out. Dissimilar materials may require metallic tooling. We have operated up to 14 bar!
  1. Q: What temperatures can the tool withstand?
  2. A: Nylon tooling will safely operate up from -10 to 40 deg C, for temperatures higher than 40 we would use metallic tooling.
  1. Q: What sort of pump (system) is needed?
  2. A: The pump/delivery system must provide a uniform feed at a consistent pressure. There are a huge number on the market.