DYMAX Speedmask® 718 UV/light cure masking resin brings the benefits of reliable, quick, effective application and simple removal, to the protection of turbine blades, vanes and other components during specific area surface treatments such as APS and HVOF coating.
Protecting areas being left untreated is crucial to high quality outcomes with these maximum performance parts where Speedmask 718 provides excellent temporary protection for surfaces and cavities – so enabling the processes of manufacture, overhaul, repair and rework that have been far more difficult in the past using other traditional means.
Speedmask 718 is readily applied and cures quickly when exposed to UV/visible light forming a hard durable, protective covering on many surfaces, including nickel alloys and high temperature steel. It can then be cleanly removed from the substrate by incineration at over 650°C, leaving a light ash which can be readily disposed of.
We offer a range of temporary masking resins that provide reliable and cost effective protection for critical surfaces and cavities during finishing operations. Dymax SpeedMasks cure in seconds upon exposure to UV/visible light and replace traditional masking materials such as tapes, lacquers, waxes, boots and caps. SpeedMask resins are easily applied, and are available in peelable, water-soluble and burn-off grades that leave component surfaces residue-free. Formulations are available for a full range of processes, including acid stripping, anodising, chemical milling, grit blasting and plating.
QuantX™ – the latest generation of dispensing components, designed and manufactured to compete – and be compatible – with other leading brands. We offer next day delivery and economical purchase price for engineers and buyers.
The QuantX range has been developed by our partner Fisnar in response to market demands for a premium, compatible product, to which we can add fast delivery, competitive pricing and expert technical advice. The components deliver maximum dispense quality, efficiency and economy, giving optimised yields and minimum material waste.
The syringe barrels range covers all commonly used sizes from 3cc to 55cc, including amber and black variants for protection of light sensitive materials. They are manufactured from premium grade polypropylene under stringent conditions to ensure minimal resistance and parallel uniformity. This, in turn, provides the highest possible accuracy and repeatability when dispensing dots, lines or doses. Barrels feature an industry-standard Luer lock fitting.
The QuantX range also comprises two types of ‘Evenpress’ pistons – designed to apply even pressure and seal fluids and fumes in the barrel. QuantX barrel adapter assemblies provide a convenient quick connect to the dispensing controller, and an easy fit and a good seal to the barrel.
All components are packaged in a dust-free environment in an anti-static bag in a box, and batch numbered to help maintain traceability. Only virgin raw materials are used in order to ensure consistency, and no silicone, chlorides or amides are used in moulding or other production processes.
Our customer BPR Medical, based in Mansfield, Nottingham, is a perfect example of a small British company which combines expertise, creativity and entrepreneurialism to design, develop and manufacture world-beating products for export worldwide and use in the United Kingdom, for which it was rewarded in 2012 with a Queen’s Award for Enterprise: Innovation. As with any manufacturing company, the success of its products depends to a considerable degree on assembly methods.
Watch how BPR Medical found their dispensing solution
The company’s latest success story is the Bidirectional Firesafe™ Cannula Valve, used for in-home medical oxygen supplies to extinguish fires which can occur in the line between the concentrator and the user’s mask or nasal cannula. Such fires can occur if the line comes into contact with ambient flame – such as a candle – or more commonly if the patient is a smoker.
The UK’s Home Oxygen Service supports some 90,000 patients. In the US, accident & emergency units attend to in excess of 1,000 thermal burns a year caused by ignitions associated with home medical oxygen, of which smoking was by far the leading cause*. *National Fire Protection Association estimate
Life and death integrity
BPR’s unique inline Bidirectional Firesafe Cannula Valve extinguishes the fire by cutting off the oxygen supply. It is a development of an existing, unidirectional design and acts as a thermal fuse whereby the oxygen supply is cut off when a fusible component softens as a result of the heat from an approaching fire in the oxygen delivery tube. Integrity of operation is vital and could literally represent the difference between life and death.
When BPR had chosen a two-part epoxy to bond both halves of the valve’s body, the next task was to find a dispensing solution that would assure deposition of a precise, repeatable volume of the adhesive, metered and mixed in the correct ratio, on to a cylindrical assembly. The resulting bond integrity would help ensure conformance for CE marking under European Medical Device Directive, as well as BPR’s unerring commitment to quality.
Technical Director Ben Johnson’s team evaluated a number of possibilities, including premixing and dispensing via a pinch tube valve. This yielded inconsistent results due to changes in viscosity which begin to occur naturally as soon as epoxy is mixed, exacerbated by temperature fluctuations. It also took an unacceptable amount of set-up and clean-up time.
The accuracy of volumetric dispensing
Having determined that volumetric technology would provide a better solution, BPR contacted us and two other vendors to arrange equipment demonstrations. Trials using the selected epoxy were conducted in a wide ambient temperature range, and rigorous pull, flexural and other testing of the assembled valve, revealed that the preeflow eco-DUO precision metering, mixing and dispensing system suggested by our product specialists was the correct solution. It offers ±1% dosing accuracy, >99% repeatability and can dispense volume flows of 0.2 to 32ml per minute, with a minimum volume of 0.01ml. The preeflow positive displacement technology means that the volume dispensed is not affected by viscosity changes in the material.
Key Customer Benefits were recognised as:
Confidence of consistently high quality
Decreased operating costs
Time savings pre, during & post-operation
Reduced material usage
Reduced reject rates
De-skilled assembly process
Aesthetically superior products
The two alternative potential vendors and their systems were also evaluated, but we were selected – not only on the basis of the preeflow eco-DUO meeting BPR’s needs, but because of the lower total cost of ownership and promise of superior initial and ongoing support from our team.
Ben Johnson and Product Development Programme Manager Mike Brudenell worked with our product specialists to configure the dispenser into its bespoke manufacturing jig, into which the two populated halves of the Firesafe valve body are manually loaded prior to being rotated whilst the epoxy is applied. Each of the 20,000 units per month produced at the time of writing is non-destructively tested, whilst regular samples are subject to a three-point flexural test.
The system operates an automatic purge at the end of the shift, eliminating the need for cleaning down. Control is via a preeflow plug ‘n’ mix interface and stored settings ensure consistency and repeatability, and eliminate daily set-up time. Thanks to preeflow’s accuracy, the volume of epoxy applied has been reduced to 0.05g from the pinch tube valve’s 0.06g.
Ben Johnson commented:
We had to go through a number of stringent processes to ensure the integrity of the bonding of the two body halves. An essential part of this was how the two-part epoxy adhesive was applied: to ensure a highly accurate, repeatable dose on a rotating jig, but also to maintain the correct dispense volume regardless of viscosity changes caused by temperature. After evaluating a number of options, we chose the preeflow eco-DUO from Intertronics as it provided the best results for both of these criteria.
Intertronics helped us choose a volumetric dispensing solution that was the best one for our needs. We’ve been very impressed with their expertise, they’re responsive and always on hand to support us with any queries or technical support we might need. The way they’ve helped us to integrate and set up the system means that we always achieve a consistently high level of process capability.
Not only that, but we estimate our return on investment to be in the region of £2,000 a month.
The Relyon Plasma PB3 Plasmabrush offers convenient, high speed, high performance atmospheric plasma cleaning and surface activation. The PB3 Plasmabrush is a nozzle-type plasma generator which is particularly compact and offers long-term stability. Proprietary Pulsed Atmospheric Arc Technology uses a unipolar pulsed high voltage source and a vortex flow in the nozzle which delivers uniform high power density with only minimal warming of the nozzle and hardly any erosion of the electrodes.
The use of atmospheric plasmas for industrial applications has become widespread in many different sectors. Pre-treating or activation of surfaces prior to bonding, coating or laminating is readily achieved using atmospheric gases, rather than wet chemical primers. At the same time, the cleaning action of the plasma can remove residues from release agents, lubricants or cleaning agents left on surfaces. Atmospheric plasma cleaning is a dry, non-contact, non-abrasive cleaning process.
The PB3 Plasmabrush is able to be integrated into continuous production processes due to a compact and lightweight, modular design and the adaption of the PS2000 high voltage power supply to the CanOpen industrial standard communication protocol. The system supplies meaningful digital data from which valuable process information can be gained. It offers precision for fine detail areas over-complex 3D shapes and is gentle enough to treat even thin textiles or delicate materials including porous substrates and foams – large areas may be treated remarkably quickly.
The PB3 Plasmabrush is used for applications such as cleaning/activation of metals, glass and plastics for optimum wettability of coatings, inks, etc., and preparation prior to sealing or bonding. More specialised projects have included the bleaching of textiles without the use of chemicals, and plasma sterilisation of fabrics and thermally sensitive plastic materials.