Injection Molding
Tungstenite provides the molder with relief on a wide range of applications. Tungsten disulfide non-migrating dry lubrication will help with part release, product flow, temperature and pressure reduction and faster cycle times. WS2 is a positive part of the PM System. Tungsten Disulfide can be applied to non- molding surfaces such as ejector pins, gibs, slides, lifters, bushings and leader pins. Tungstenite will provide for more uptime, therefore increasing the number molded parts and allow longer preventive maintenance intervals.
Medical Grade Mold Release
Tungsten Disulfide can be used as a safe, inert mold release coating. Many medical injection molders run their molds without any mold release because of concerns that it will contaminate the final product. This can cause slower cycle times and excessive wear on the mold. A WS2 coating can easily improve efficiency.
Spiral Flow Study
Conducted by Western Washington University
3% to 9% Spiral Flow Increase with WS2 Coating
The Spiral Flow Study and Analysis was conducted totally independent of M.S.C. influence or guidance and in strict compliance with SPE procedures. All test resins were run to their manufacturer’s specifications.
The study was conducted to quantify flow enhancement afforded by the WS2 coating when applied to injection, blow, and extrusion tooling.
Over the course of four years, virtually all WS2 customers experienced improved product quality due to reduced required operating pressure and temperatures, as well as significantly lower operating costs resulting from faster cycling and increased tool life. Because the four year performance record is so consistently favorable we are able to not only claim substantial user benefits-we guarantee them.
The following test data includes the most often run resins and demonstrates the flow enhancement provided by WS2. A standard MUDD spiral tool was used for the study.
Tungstenite(WS2) Provides:
USP class VI approved
Maintenance of the dimensional integrity of the substrate to within 0.5 microns (20 millionths) with no build-up
Enhancement of the flow of resin due to its low coefficient of friction
Reduction in part weight. Part is not packed as tight
Release of parts quicker
Reduction of pressure and mold wear
Lower operating temperatures
The capability to produce more parts per hour
Reduction of rejects
An inert, inorganic, non-toxic, non-distortive, non-corrosive lubrication that is resistant to most fuel solvents
Compatibility with and enhancement of all other lubricants and releasing agents
Slight delay of corrosion
Bonding to all metal or plastic materials and platings and can't be removed without eliminating the bonded substrate
Elimination of material transfer to finished agents
Application to no. 1 diamond mirror finish… lense quality
100% lubricity throughout the entire mold
Application into slots or holes as small as .060 inch
Application to the entire mold surface or only specified inserts, cavities and core pins
WS2 Does Not:
Require heat curing
Build-up on corners and edges
Transfer to finished parts, therefore not requiring secondary cleaning for painting, plating, etc.
WS2’s unique, extensively modified lamellar composition of Tungsten Disulfide outperforms other dry coating lubricants. A pressurized air application process impinges a dry metallic coating without heat, binders or adhesives. The lubricant coating bonds instantly to any metal or resin substrate with a thickness of 0.5 microns (20 millionths).
WS2 Reduces Cycle Yime, Costly Maintenance, and Extends Mold Wear Life
Injection molders, blow molders, and extruders have discovered WS2’s ability to almost eliminate drag between tool steel and resin.
WS2 Technical Information
Composition:
A single layer of modified Tungsten Disulfide .5 microns thick
Molecular weight of 248.02
Density of 7.4 gms/cc
Hardness of 30 Rockwell C
Non-magnetic
Uniform silver-gray in color
Substrates:
All ferrous and non-ferrous metals and selective manmade solids and plastics.
However, the harder the substrate, the better the bond.
Adhesion:
High velocity impingement applied at ambient air temperature.
No cure time required
No binders or additional adhesives
Temperatures Range:
-460°F to 1200°F (-273°C to 650°C) in normal atmosphere
-360°F to 2400°F (-188°C to 1316°C) in hard vacuum
Load Capacity/Pressure:
Same as substrate to 100,000 psi
Coefficient of Friction:
Dynamic 0.035 Static 0.07
Coefficients lower then .05 are attainable but will vary with humidity
Chemical Stability:
Inert, non-toxic and non-corrosive
Accepts petrochemical oils and greases, synthetic oils, silicone lubricants and hydraulic fluids.
Does not prevent corrosion of substrate
Lox Compatibility:
Insensitive to detonation by or in the presence of oxygen