GMPT's Manufacturing Analysis Group worked with the Defiance, Ohio-based GMPT foundry to validate the core modeling software on a production core
blowing machine.
No citations have been issued, even though trains still are
blowing their horns.
Features: Injection unit has 5 or 10 cavities;
blowing wheel module has 2 molds; 5:1 ratio between injection and
blowing cavities; continuously turning extruder screw for melt homogeneity; low-cost tooling (shell molds, one set of tools).
Session D on "
Blowing agents" will explore developments in zero ODP (ozone depletion potential)
blowing agents for the rigid foam industry.
Foamazol chemical
blowing agents for use in most application such as structural foam, wire and cable, profile and sheet, blown and extruded films, blow molded containers, injection molding, and PP ribbon extrusion.
In closed-cell foams, the ever-changing climate for
blowing agents is said to require quick and accurate measurements of heat transmission, and state-of-the-art data acquisition is essential.
As the uncured slab expands (from thermal expansion, curing or sponging caused by
blowing agents), the probe rides on the sample surface and a read-out of the expansion is graphed on the TA recorder.
Adds Glenn Woten, president of Unisul: "We believe this union gives us greater financial strength to grow our business, by developing new products and by targeting CertainTeed customers and non-customers with Unisul insulation and fireproofing
blowing machines.
Highlighting new BA-14 CoEx system, claimed to be the industry's largest six-layer coex machine designed for lab use, and the new tandem-blow process for simultaneous top and bottom
blowing of two bottles per parison, tail-to-tail.
As the blades pull back and
blowing is completed, the plastic self-seals and forms a ribbed structure.
The conversion to "cleaner"
blowing agents in the polyurethane foam business is largely done, and now much effort is being directed toward optimizing formulations to deliver better foams that are also easier to process and lower in cost.
In addition to these exothermal products, a separate line of endo-thermal
blowing agents is available.
