Material requirements for vacuum forming
1. Vacuum forming can only produce products with relatively uniform wall thickness (generally slightly thinner at the chamfer), and cannot produce plastic products with significantly different wall thicknesses.
2. The wall thickness of vacuum forming is generally within the range of 1 to 2mm or thinner (the commonly used thickness for vacuum packaging sheets for small packaging is 0.15 to 0.25mm).
3. The stretchability of vacuum formed products is limited to a certain extent, and the diameter to depth ratio of vacuum formed plastic containers generally does not exceed 1, and in extreme cases, it should not exceed 1.5.
4. The dimensional accuracy of vacuum forming is poor, and its relative error is generally above 1%.
Formula for calculating material costs
Product material cost=1 ton of raw material price/1 ton of raw material finished product quantity.
1 ton of raw material production quantity=1 ton of raw material length/(blister template length+4cm to 15cm stretching edge) x layout quantity x (100% – material loss rate).
1 ton of raw material length=1 ton/material density/film thickness/width (vacuum molded chassis width).
The material density (PVC is 1.36T/m3), vacuum molded chassis width (0.51-1.20M), template length, and other four parameters are estimated based on experience.
