Injection Molding

WS2 impinged injection mold

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.

spiral flow chart

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:

WS2 impinged Mold

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

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
Uniform silver-gray in color

All ferrous and non-ferrous metals and selective manmade solids and plastics.
However, the harder the substrate, the better the bond.

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