Monday, May 31, 2010

How Much Plastic Do You Need?

Calculate Amount of Plastic To Be Processed Per Hour



Calculating the amount of material per hour that you will be processing is a fairly simple calculation, but with DZynSource for Molds it's even easier.

From the main menu, choose the "Production Calculations" command button.



Figure 1. DZynSource Main Screen

This is one of the few calculations that can be chosen from more than one sub-menu. It can also be found under the "Molding Calculations" sub-menu.




The blank form for doing this particular production calculation is fairly self explanatory. You first choose the unit of weight for the plastic molded part. In my experience, the part weight is usually measured in grams. The industry that I work in, caps and closures, packaging, medical disposables, and so forth, the parts are fairly small and usually measured in grams. The ounces and pounds are there for the molders, mold makers and other personnel that work with the larger parts.


So, choose the unit of measurement for the part weight, enter the number of cavities in the mold, and enter the cycle time in seconds. If the mold is full hot runner, then there will be no cold runner to allow for and you enter zero for the runner weight.

If the mold has any amount of cold runner, enter it in the text box next to "Enter runner weight in grams". 
The unit of weight for the runner changes with the units chosen for the molded part, so that they are always in the same units.

Press calculate, and that's all there is to it. You can press clear to clear all fields and start again, press "Print" to send a copy of the form to the default printer, or press "Menu" to return to the Main Screen.  The solved example below is for a 12-gram part being produced by a 64-cavity full hot runner mold that runs a 10 second cycle.  As you can see, you'll be processing almost 610 pounds of material per hour.  The equivalent weight in kilograms is also given.

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