In final thesis we tested the effect of the gap on heating the injected compound in the cold runner nozzle. The compound is to be heated to shorten the cycle times and facilitate filling of the product. With the program Sigmasoft we created a parametric simulation in which we examined the influence of different geometry, injection parameters and two different compounds. After the simulation followed a realistic test of the similar technology. We tested injection unit with double injections. In the simulation and the real test the same compounds were used, of which accurate properties have been measured. We found out that out concept approaches temperature increases which are achieved with double injection, but with larger pressure input.
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