Plastics

How Design Errors Show Up As Tooling, Processing, Materials And Abuse Issues

Abstract For a plastic part or assembly to perform as expected, proper consideration must be given to material selection, part design, tooling, and processing using a holistic approach. In a lot of instances, design errors are mistaken as tooling, processing and material issues. Design errors are even sometimes misclassified as customer abuse. Introduction Let us …

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Practical Adherence to Design Rules – a Matter of Choice?  Part 4

This is a continuation of the discussion from Part 1, 2 and 3. Let us start with a quick summary: Unlike metals, plastics are not capable of withstanding long-term stresses.  A significant number of failures occur due to long term stresses.  These long-term stresses can result from: Willful disregard of this inherent characteristics of the …

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Practical Adherence to Design Rules – a Matter of Choice?  Part 3

Part 1 and 2 Summary This is a continuation of the discussion from Part 1 and Part 2.  Let us start with a quick summary: Unlike metals, plastics are not capable of withstanding long-term stresses.  A significant number of failures occur due to long term stresses. These long-term stresses can result from: Willful disregard of …

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Factors Affecting the Strict Adherence to Design Rules – Part II

Practical Adherence to Design Rules – a Matter of Choice?  Part 2 Part 1 Summary This is a continuation of the discussion from part 1.  Let us start with a quick summary: Unlike metals, plastics are not capable of withstanding long-term stresses.  A significant number of failures occur due to long term stresses.  These long-term …

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Factors Affecting the Strict Adherence to Design Rules – Part I

Practical Adherence to Design Rules – a Matter of Choice? So, you have designed successful parts with sharp inside corners, uneven walls, thick ribs, low draft angles, etc. Based on this, you feel strict compliance to these rules may be an overkill. You further feel that taking care of these design requirements adds unnecessary time …

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