A Resource for Plastics Engineers Flow leaders are local increases in the nominal wall thickness, whereas flow deflectors are local decreases in thickness. Many times a part...
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| [pdf] designguide.indd can help you effec- tively resolve some more common design problems. Nominal Wall Thickness For parts made from most thermoplastics, nominal wall thickness should not...
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| [pdf] http://www.mdayinc.com/guides...
part failure 2. Material type and lot number 3. Injection molding parameters 4. Nominal wall thickness, gate size, number of cavities 5. Material handling procedures, regrind...
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| [pdf] Mech-PlasticPartDes.Insert Molding Managers Lesson Titles and Descriptions: Lesson 1: Designing the Nominal Wall * Determining thickness of nominal wall, how it affects directional properties of the...
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| ,"Service Contact Person",,,"Contact Phone Number" measurement units)" ,"Part Name",,,"Height" ,"Weight",,,"Width" ,"Nominal Wall Thickness",,,"Length" ,"Max. Flow Length",,,"Min. Wall Thickness" ,"Material...
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| [pdf] Design* Figure 15-11 As a rule, inside corner radii should be 30 to 50 percent of the nominal wall thickness with a 0.020 inch radius as bare minimum. Outside corners should have radius...
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| Design Tips for Rapid Injection Molding even if the mold itself is textured perfectly. For example, a wall with greater than nominal thickness will pull away from the textured mold surface during solidification,...
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| Balancing with Flow Leaders & Flow Deflectors... |
| Plastics flow leaders are local increases in the nominal wall thickness, whereas flow deflectors are local decreases in thickness. Many times a part cannot be balanced by gate placement alone. It can be useful to slightly change the wall thickness to enhance or retard the flow in a certain direction. |
| What Causes Plastics Parts To Warp?: IDES... |
| Almost anything you can think of causes warpage in one form or another. This time it’s the omission of a little dimple. |
| Notch Sensitivity: IDES - The Plastics Web® |
| This month I received a white plastic coat rack to look at. The runner was missing but I could see what the problem was right away. I doubt if anyone will be surprised to find out that notch sensitivity issues were the problem with this otherwise nice-looking, fairly tough part. |
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