Extreme Coating/ Surface Engineering & Alloy C
Contact: James McLeod-Greg- Larry Dwyer
2895-46th Ave.
St. Peterburg, FL 32714
U.S.
Phone: 888-367-2569/ 727-52
Fax: 727-528-7995
REDUCE FEED SCREW WEAR WITH EXTREME COATINGS!
Buying injection molding supplies often includes replacing your machine feed screws. Of all your injection molding supplies, this is definitely one of the most expensive. Now there's a better way!
Surface Engineerings Extreme Coatings process utilizes the new emerging thermal spray technologies to apply an extremely wear resistant and/or corrosion resistant protective coating to virtually any size injection molding or extrusion feed screw.
As a result you can now:
* Reduce machine downtime
* Slash operation costs
* Increase productivity
* Decrease screw rebuild costs
* Extend barrel life
* Keep your same feed screw vendor
Our process provides crack free coatings with hardness values ranging from 30- 70 on the Rc scale in thickness from .001-.030. Proprietary compositions of various carbides, ceramics, and alloys are incorporated to achieve abrasion and corrosion resistant characteristics unmatched by any of the conventional hard-facing alloys popular today. This process completely eliminates the necessity for chrome plating, flame hardening, or "nidriding", as the entire screw surface is coated, including the root, flight sides and flight lands (Read Abrasion Resistance Data).
We offer a variety of root and flight side surface finishes ranging from +/-140 RMS to our 16-32 RMS finish, which rivals chrome plating in appearance. We also finish grind to dimension and have the capability to strip coated screws for rebuild when worn.
The coatings are excellent for screws exposed to filled resins, rubbers, or other abrasive compounds. Additionally, corrosion resistant coatings are available eliminating the need to fabricate components from costly raw materials. Furthermore, the process requires no preheat or post heat procedures and during application, components rarely exceed 350° F. The low heat input helps prevent distortion, minimizing costly straightening or machining time.
Preparation for screw coating requires rebuilding or manufacturing to predetermined dimensions based on coating thickness desired.
We also work through your current screw manufacturer to provide this service. Therefore, it is not necessary to change vendors.
Another unique characteristic of the process is the capability to rebuild CPM (?) screws, provided wear is limited to approximately .015 per side or .030 overall.
Other applications where this process is currently utilized include turbine components, bushings, shafting, mixer blades, chutes, fan blades, conveyors, slurry pumps, and many other applications where extreme conditions of wear or corrosion exist.
(?) CPM is a registered trademark of Crucible Specialty Materials.
injection molding supplies
THE PROCESS
As the gas mixture burns, the powder particles are melted and accelerated down the barrel. Temperatures above 6000 ºF are attained within the combustion chamber while the substrate temperature is maintained below 350 ºF by a gas cooling system. Particle velocities of approximately 2,500 ft/s are produced.
The kinetic energy released by impingement upon the substrate contributes additional heat and promotes bonding, high density, and appreciable hardness values. The coating is built up to the specified thickness while the workpiece is rotated or passed in front of the gun.
© Copyright 2002 - Surface Engineering & Alloy Company
