Know-How
MATERIALS: Don’t Guess Your Way through Root Cause Analysis: Part 2
The huge chasm between the laboratory and manufacturing discipline usually does not lend itself to problem-solving. It can be improved with clear communication between the analysis laboratory and the people bringing the problem to the lab.
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BLOW MOLDING: The Role of Screw Design in Industrial Blow Molding
Screw design is seldom discussed when buying a new machine. In fact, it should be near the top of the list.
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EXTRUSION: Why Barrier Screws & Rigid PVC Don’t Always Mix
RPVC’s somewhat unusual melting mechanism makes it unsuited to traditional barrier type designs.
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INJECTION MOLDING: The Importance of Nominal Wall For Lightweighting Molded Parts
Establishing a nominal wall is one of the most important decisions an engineer makes when designing parts. Understanding how design changes will impact the manufacturing process is critical to ensure the part performs as expected.
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MATERIALS: Don’t Guess Your Way Through Root Cause Analysis
More than 50 different polymer test techniques can be used to find root causes of problems. Of these, five or six are fairly common. Use them to take the guesswork out of why a product failed.
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EXTRUSION: Processing Rigid PVC? Know Your Rheology
Before choosing and sizing extruders for running rigid vinyl, it is wise to bone up on the viscosity behavior of the material.
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MATERIALS: Performance in Polyethylene: Density Matters: Part II
Remembering the case of the failed gas tanks.
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TOOLING: Balancing the Heat Budget In Injection Molds
Basic formulas for how much heat you must pull out of the mold to achieve a set cycle time
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EXTRUSION: When Internal Screw Cooling Makes Sense
Internal screw cooling could help you solve solids-feeding and burning problems.
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INJECTION MOLDING: Setting Mold Protection Takes Time But Saves More
Mold protection is often neglected, but it more than pays for the time and attention required.
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