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THERMOFORMING MANUAL and TROUBLE-SHOOTING GUIDE
THERMOFORMING AND TROUBLESHOOTING GUIDE
Courtesy of Leroy M. Boser 574-370-2003
PREFACE……………………………………………………………………………………..1
DESCRIPTION OF VACUUM FORMING…………………………………………….1
VACUUM FORMING TECHNIQUES …………………………………………………..1
1. DRAPE FORMING – BOTTOM (Figure 1.) ……………………………………….1
2. DRAPE FORMING – TOP …………………………………………………………….4
3. PLUG ASSIST – BOTTOM (Figure 2.)…………………………………………….4
4. PLUG ASSIST – TOP …………………………………………………………………..6
5. SNAP BACK – TOP See figure 3. ……………………………………………………7
6. SNAP BACK – BOTTOM See figure 3……………………………………………..9
7. BILLOW FORMING – FEMALE (BOTTOM) See figure 4. ………………….10
<a title="The Thermoforming Guide" data-cke-saved-href="https://fyb3e2bclzn3p7wmo4d0xgw1-wpengine.netdna-ssl.com/wp-content/uploads/sites/2/2017/10/VACUUM-FORMING-MANUAL1.pdf%20target=" href="https://fyb3e2bclzn3p7wmo4d0xgw1-wpengine.netdna-ssl.com/wp-content/uploads/sites/2/2017/10/VACUUM-FORMING-MANUAL1.pdf%20target=" _blank"="" rel="noopener" style="box-sizing: border-box; background-color: transparent; color: rgb(66, 139, 202); text-decoration-line: none;">8. BILLOW FORMING – FEMALE (TOP)…………………………………………..12
9. BILLOW FORMING – MALE (BOTTOM)……………………………………….12
10. BILLOW FORMING – MALE (TOP) ……………………………………………13
11. ZERO GRAVITY ……………………………………………………………………..13
12. PREBLOW PLUG ASSIST FORMING………………………………………….15
13. TWIN SHEET FORMING (Figure 4.1) ……………………………………. …15
14. MATCHED-MOLD THERMOFORMING (Figure 4.2)…………………….18
15. FREE FORMING OR BUBBLE FORMING……………………………………18
16. HAND FORMING……………………………………………………………………20
DRAW RATIOS……………………………………………………………………………21
IMPORTANT CONCERNS IN VACUUM FORMING……………………………26
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We are a stocking dealer of previously owned plastic processing and packaging equipment. Since 1975, Plastimach Corp. has consistently delivered quality used plastic process equipment to our customers. Most of our inventory can be inspected at our New York or Chicago warehouses.
Our staff has over 75 years of experience in the thermoforming industry, and we look forward to discussing your particular application in order to suggest the equipment that is right for you
704 Executive Blvd.
Valley Cottage, New York 10989
Fax: 845-875-9401
Toll-free: 1-800-394-1128
