Madison, NJ – Staying abreast of technology and exhibiting discipline in production operations are key to keeping molding plants and services internationally competitive, according to plastics consultant John Bozzelli, owner of Scientific Molding. Processes need to be developed based on plastic variables that enable identical parts to be formed consistently A tool that he uses in his seminars and troubleshooting services to demonstrate and eliminate “flash”, which produces defects, is Pressurex® pressure indicating sensor film. Bozzelli has been named one of the top three plastics processors by a leading plastics trade magazine.
To demonstrate flash, the flexible sensor film, which measures surface contact pressures from 2 – 43,200 PSI (0.14 – 3,000 kg/cm2) is carefully placed around the parting line of a mold that is subjected to pressure. The clamp pressure is then reduced to as low as possible on the machine to prevent tool damage and the sensor film is clamped up. The mold is then opened and the film checked for color variations along the parting line. The color the film turns is directly proportional to the amount of pressure applied.
Pressurex® sensor film reveals and corrects defects along the parting line.
In the photograph, pressure inconsistencies are displayed as different shades of pink which can be compared to a color calibration chart. White patches at the top or bottom of the film (left) indicate that flash has occurred on the mold (right). Gaps between the dark pink rectangles indicate the vents and their dump channels)
Sensor Products Inc.
Filed Under: Materials • advanced, Sensors (position + other), Test + measurement • test equipment