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Extrusion Basics: Material Matters, and So Do Quantity and Measurement
By Allan Griff
The Romans needed a holiday in midwinter as they didn't do Christmas or New Year and followed the agricultural year, as did the Jews. The new moon told them when another month had passed. So they started the feast of Februa, which led to this month's name.
They knew about many elements and even made glass and bronze but didn't understand chemistry and biology. We get it in school but most of us forget soon thereafter. Worse yet, many reject the rules of science and are proud of it.
They are then “free” to follow the lawless pulls of convenience and popular images. They may even agree to the existence of plastic pollution even though plastics are not toxic to us, can't be digested, and are not even a major contributor to global warming.
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Engel Delivers Its Largest-Ever Molding Machines to US Company
By PlasticsToday Staff
Two injection molding machines with a clamping force of 8,000 tons each have now been delivered by Austrian injection molding machine maker Engel to the Infiltrator Water Technologies (IWT) plant in Winchester, KY. IWT took delivery of the first Engel duo 130000/130000H/8200 combi US machine, the largest machine?ever built at Engel’s St. Valentin facility in Austria, in February of last year. A second machine, a replica of the first, arrived at the facility this month. IWT, a subsidiary of Advanced Drainage Systems (ADS), produces water management products.
The duo injection molding machines each have two 85,000 cm3 injection units, which allow for injecting a total shot weight of 270 lb (122 kg). Despite the clamping force and shot size, the machines have a relatively small footprint — 96 ft. (29.3 meters) long and 37 ft. (6.4 meters) wide —?enabled by Engel’s two-platen design.
The Troubleshooter: The Role of Moisture in Injection Molding Splay Defects
By Garrett MacKenzie
Plastic injection defects can lead to large scrap events and lost profits, and splay is one of the more frequent defects a processor must correct. The three main causes of splay are heat, moisture, and shear. This three-part series in the Troubleshooter column outlines key signs used to evaluate splay conditions. It will also profile key analysis points and recommend procedures to fix various splay scenarios. Last month, we focused on?heat-related splay defects. Now, we’re moving on to splay defects caused by moisture.