I work at a company that manufactures TPU screen filters for the mining industry. I've got a test to do to inspect whether the qaulity of the TPU is affected by time in the heated barrel of the injection moulding machine. The TPU material sits in the barrel due to tea and lunch breaks (15 - 30 minutes), also through maintenance and shift change (up to an hour downtime for maintenance). Attatched is my preliminary method for casting my test samples. If anyone could just have a look at it and give me feedback, it would be highly appreciated.