Injection Mold Life Extended with Ultrasonic Cleaning

Before and After Ultrasonic Cleaning Injection Molds

Injection molds used to form plastic products can represent sizeable investments and are characterized by complex shapes, precision finishes and vents.  Cleaning plastic injection molds must be accomplished on a regular basis and in such a way that removes all traces of burned on deposits from surfaces and residual plastic in vents without scratching or otherwise mechanically damaging mold surfaces.   

“Our investment in injection molds can reach tens of thousands of dollars each,” says Roger Wheeler, tooling manager at PAM Injection Molding based in Kernersville, NC. “While different molds have different surface tolerances, customer-demanded tolerances for a mold surface can be as precise as 0.0002 inch. That’s why,” he says, “longer injection mold life depends highly on not only keeping them clean but conducting mold cleaning operations in such a way that extends their life by maintaining surface finish tolerances.”… Read the rest

Avoiding Errors with Analytical Balances

Avoiding Errors with Analytical Balances

Avoiding errors when using analytical balances – or for that matter any weighing instrument – involves the coming together of several practices on the part of the user.  This post focuses on assuring accurate weighing results when using analytical balances with readouts (what is displayed on the instrument) to milligrams.    For an analytical balance such as the KERN ABT 120-4M available from Tovatech it is 0.1 milligram.   Semi-micro balances can display to micrograms or 0.01 milligram.

Accuracy is paramount when weighing to these levels with analytical balances and is often subject to regulation by organizations such as the FDA and professional trade associations.  Technicians must institute practices and procedures to avoid weighing errors and to insure that the displayed weight precisely reflects the weight of the sample.

Ultrasonic Cleaners for Jet Engine Maintenance

Ultrasonic Cleaners for Jet Engine Maintenance

Regular maintenance procedures are strictly prescribed for aircraft jet engines and include thorough cleaning and inspection of fuel nozzle assemblies.  “An example is the highly popular Pratt & Whitney PT6A engine which requires cleaning engine fuel nozzle manifold adapter assemblies every 400 hours of operation,” says Scott Pottebaum, Director of Technical Services, Elliott Aviation in Des Moines, IA.   “Overhaul and maintenance procedures are clearly spelled out in the P&W Maintenance Manual; service organizations such as Elliott Aviation are responsible for performing these procedures then testing the engines before they are approved for return to service.”… Read the rest

Ultrasonic Cleaning of Scuba Gear

Ultrasonic Cleaners for Scuba Gear Maintenance

Perfectly functioning valves and regulators are essential for reliable air supply to scuba diving enthusiasts. Fresh water rinsing scuba regulators after each dive is part of the ritual; ultrasonic cleaning of disassembled regulator components should be a part of any organization renting gear or offering scuba diving excursions.

A good example is Florida based All Star Liveaboards, offering scuba diving enthusiasts “the best in liveaboard scuba diving and snorkeling in the Caribbean.”  Living aboard the Aqua Cat or other company vessels participants enjoy  week long cruises  from Nassau, Bahamas, to the islands of the Exuma Sound.  Participants include experienced divers with their own or All Star’s rental gear and novices wishing to learn the sport from All Star’s certified on-board scuba instructors.… Read the rest

Ultrasonic Cleaners for Flammable Solvents

ultrasonic cleaning using flammable solvent

Ultrasonic cleaners are widely recognized as providing outstanding cleaning action thanks to the cavitation produced by the equipment’s generator powered ultrasonic transducers.  But when cleaning with flammable solvents it is imperative that explosion resistant ultrasonic cleaners are employed in the shop, and that the equipment be located in an area equipped with an adequate exhaust system to vent fumes to an exterior location.

Flammable solvents are often preferred for tough cleaning jobs such as degreasing and removing tenacious contaminants like paint and adhesive residues.  Special care must be exercised when cleaning with flammable solvents under any circumstance, but especially when using an ultrasonic cleaner to both speed the process and improve cleaning results.   Unless they are specially constructed, ultrasonic cleaners present two risks:  sparks from internal electronics igniting spilled solvents and fumes, and vapors from solvent evaporation creating a hazardous area in the vicinity of the unit.   … Read the rest

Essential Features for Scientific Refrigerators

Scientific Refrigerators from Norlake

Scientific refrigerators have essential design and performance features that support their ability to safely store temperature sensitive biologicals, pharmaceuticals and similar products under exacting conditions.  At Tovatech we suggest customers consider scientific refrigerators such as the Norlake Select series an investment to protect valuable and sometimes irreplaceable contents from temperature excursions that would render them useless.   

Ultrasonic Cleaning Preserves New and Old Vinyl Records

Ultrasonic Cleaning of Vinyl RecordsVinyl records, the 33-1/3 RPM LPs and 45 RPM (juke box) discs, first came on the market in 1948 and in the 1950s grew tremendously in popularity until the advent of CD recordings.  But then something strange happened. Sparked by music aficionados’ appreciation of the unique sound quality of vinyl vs. digital CDs and the ability of ultrasonic cleaning to preserve and restore these records, vinyl sales increased 32% to $416 million in 2015, a 28-year high according to the Recording Industry Association of America.

The resurgence of interest in vinyl recordings has led to a new service industry specializing in cleaning the discs to preserve their unique sound quality and minimize wear.  A leader in this service is Pure-Grooves, LLC based in the Chicago suburb of Berwyn, IL.  Company founder Vince Tornabene has developed a  vinyl record restoration service based on a dual-frequency, adjustable power Elma P60H ultrasonic cleaner … Read the rest

Selecting and Using Precision Scale Test Weights

Calibrating Scales with Test Weights

Weighing accuracy is a primary criterion for precision scales, analytical balances and moisture analyzers where readout (the smallest weight difference displayed) and linearity (the ± deviation from the actual weight) are governed by GLP, ISO and other standards.  Test weights have a critical role to play when scales  with capacities from milligrams to tons are not automatically internally (see below) calibrated . The type of calibration, whether internal or external, is indicated on scales’ spec sheets.

New E Plus Line of Elma Ultrasonic Cleaners Available from Tovatech

Elmasonic E Plus Ultrasonic Cleaner BrochureUpgraded E Plus Features Target Parts Cleaning and Laboratory Applications

Ultrasonic cleaning equipment distributor Tovatech announces the availability of the new Elmasonic E Plus line of 37 kHz benchtop ultrasonic cleaners in 9 stainless steel tank capacities from 1/4 to 7-½ gallons. Replacing the Elmasonic E line, the newly designed E Plus ultrasonic cleaner units deliver about 30% more ultrasonic cleaning and mixing power.

Microprocessor-controlled Power Tracking assures reproducible performance run-to-run.

Operator-activated Pulse produces intermittent bursts of high power intensity to remove stubborn contaminants, degas solvents and to mix, disperse and dissolve lab samples.  An automatic Sweep mode ensures even distribution of cleaning action throughout the ultrasonic bath.  The choice of Sweep and Pulse functions addresses the full range of ultrasonic unit applications in scientific and medical laboratories as well as industrial shops.… Read the rest

New Elma xtra ST Industrial Ultrasonic Cleaners Available

Elmasonic xtra ST Ultrasonic Cleaner BrochureNew 25/45 kHz Elma xtra ST Units feature dynamic sweep/pulse mode for enhanced cleaning action

Ultrasonic cleaning equipment distributor Tovatech announces the availability of the powerful new Elmasonic xtra ST line of dual-frequency 25/45 kHz industrial ultrasonic cleaners in 7 stainless steel tank capacities from 8 to 67 gallons. These rugged wheel-mounted ultrasonic cleaner units feature a sweep mode for uniform distribution of cleaning energy, a user-activated pulse mode for a 20% increase in cleaning performance, and a dynamic sweep/pulse function for enhanced cleaning action.

Tovatech director Dr. Robert Sandor says the new Elma xtra ST ultrasonic cleaner line is perfectly positioned to replace spray and solvent cleaning operations across a broad range of industrial cleaning requirements.  Typical applications range from removing stubborn contaminants such as lapping compounds, heavy grease and oil buildup at 25 kHz to the more gentle 45 kHz ultrasonic frequency for fine cleaning of parts with … Read the rest