7. In plastic injection molding, temperature, time in mold and injection pressur

Question

7. In plastic injection molding, temperature, time in mold and injection pressure each play an important role in determining the strength of the part. At MAR Manufac- turing, experimenters are studying the effects on part strength when the temperature is set at either 250°E 275"F, or 300°F; the time in mold is either 5, 7, or 9 sec- onds; and the injection pressure is either 200, 250, or 300 psi. Create a table showing the factors and their lev els for this information For the information in the above plastic injection mold ing problem, follow Example 11.3 and define the com- ponents for this experiment. 8.

Explanation / Answer

There are 3 factors.

Each factor has 3 levels.

Consider Temperature factor and Pressure factor as a 3 x 3 table.

To incorporate the third factor time in mold, create 3 tables of the above kind for 3 levels of time in mould

second image is not clear.

TIME IN MOLD(sec) 5 PRESSURE (psi) TEMPERATURE(deg F) 200 250 300 250 275 300

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