P17676: Vacuum Former

Customer Handoff & Final Project Documentation

Table of Contents

Team Vision for Final Demo and Handoff

1. During this phase, our team had completed the 2'x2' box and was ready to test larger sheets of plastic. As the intent for Imagine RIT was to produce a large quantity of tiger masks, three plaster molds were made from 1'x1' tiger mask molds, so that four tiger masks could be formed at once on this new larger table.

2. As large production runs are to be performed and a relay in the heater control box had already overheated once, this heater control box was redesigned and remanufactured with better thermal management considerations.

3. Locking pins were finally constructed and implemented to the sliding rails, allowing for the clamping frame to be locked into place during plastic loading and heating stages of the operation.

Test Results Summary

1. The 0.020" plastic material was secured into the clamping frame and softened by the typical heating process. The larger plastic sheet actually appeared to sag faster than the smaller, 1'x1' sheet, possibly given the fact that the larger surface area absorbed more radiant heat that was otherwise lost around the smaller sheet. Allowing the larger sheet the sag a considerable amount, even more proportionally than the smaller sheet, the plastic was drawn over the four tiger head parts and the vacuum system still seemed able to successful pull a vacuum and form the parts. However possible, there is a noticeable lack of definition in the contours of these parts as compared to the single, 1-up part.
Four Tiger Parts

2. For the heater controller box mounted on the side of the oven, an aluminum heat sink was added to the top surface where the solid-state relays are also mounted, allowing the heat from the relays to be conducted through the fins and convected into the air. A 110V computer fan was also mounted to the bottom surface of the box, to pull air out of the box and prevent the interior air temperature from getting too high. Ducting air holes were also added to the top surface of the box, in an attempt to draw air in over the relays and cool them down by forced convection.

3. The locking pins include a spring on the inside of a chamber that constantly pushes the springs outward, toward the inside of the sliding rail. Two holes were drilled on the inside of each of these rails, for the plastic loading and heating positions. A single steel cable between the spring-loaded pins on each side of the machine allow for them to be eased of their tension while the operators translate the frame up and down.

Risk and Problem Tracking

Risk Tracking

Final Project Documentation

Budget Update:

Bill of Materials

Team Poster

Future Improvements

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