Know-How
The Scoop on Blow-Pin Stands, Pre-Pinch Units & Parison Spreaders
Spend time to identify the right accessories.
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Plasticating Rates: Your Profits Are at Stake
To get the best cycle time you need the right machine, and few molders take the time to specify this critical component of the process.
Read MoreHow Fillers Impact Extrusion Processing
Their addition can significantly change the processing properties of a polymer.
Read MoreCalculate Shot Size Vs. Barrel Capacity
It may seem like a dull topic, but it will overcome the emotional experience that follows when you put a new mold into a machine and you find out there is not enough barrel capacity to make a full shot.
Read MoreBenchmark Your Extruders For Quicker Processing Fixes
Not recognizing output reductions and resolving them quickly can cost a lot of money. Benchmarking your machines will help.
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Tool Room Management: How To Lead Your Team
Real progress in a mold shop won鈥檛 be made without a qualified and motivated 鈥渄river at the wheel鈥 who diligently searches for, and implements, continuous-improvement solutions.
Read MoreShort Shots Redux
Deliberately making a short shot permits you to do a scientific molding viscosity curve. It will also prevent you from damaging the mold by overpacking if you set shot size incorrectly.
Read MoreThe Truth About Barrel Heating
The main purposes of the heaters are to melt the polymer that remains in the barrel at cold startup, to assist in forming the initial melt, and to “trim” the barrel temperatures for specific purposes such as improving feed rate.
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Know Your Head Tooling Requirements
The head tooling consists of the mandrel and bushing. Its purpose is to form the parison size needed to make a given part.
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Where Does Shear Heating Occur? Here’s How to Find Out
One of the least understood yet most important concepts is viscous dissipation, which is the shearing or stretching of the polymer between the rotating screw and stationary barrel, causing heat to develop in the material.
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