Hydraulics & Pneumatics January/February 2022

HYDRAULICS 24 HYDRAULICS & PNEUMATICS January/February 2022 www.hpmag.co.uk ambient temperature solids to a liquid state prior to pump start-up by using integral jacketing for steam or hot oil. Robust and reliable The ASP1 model for pumping clean, non- abrasive liquids builds upon Viking’s proven design of a robust and reliable pump that has been used for decades to transfer asphalt by adding shaft seal leak prevention through use of Viking’s O-Pro Cartridge seal. This patented seal uses a double O-ring design with grease lubrication ensuring a robust and reliable seal which prevents leakage from the pump and are an ideal option when pumping clean, non-abrasive liquids. Alternatively, the ASP2 model is ideal for pumping more abrasive liquids in applications involving filled asphalts often used for asphalt roofing and sealants. The ASP2 model features hardened components in key wear areas, such as bushings, shaft, rotor and idler, which helps to ensure optimum wear resistance for long-life and reliable operation in the most demanding situations. Other important benefits of the positive displacement internal gear pumping principle include; the ability to handle a wide range of viscosities with a constant flow rate while tight clearances mean high efficiency along with excellent priming capabilities. Also, double row ball or tapered roller bearings improve thrust control while the threaded one- piece bearing housing allows for easy end clearance adjustment whilst providing a rigid foundation to maximise seal and bearing life. ASP pumps have the capacity to operate on applications handling fluids with viscosities ranging from 20 to 440,000 cSt, at flow rates up to 340 m 3 /h, pressures to 14 Bar and temperatures ranging from -15ºC to +230ºC. ENDS www.michael-smith-engineers.co.uk Rupmaya Shoe Last Industries, one of India’s largestest shoe last manufacturers, recently completed a major CNC machine tool upgrade programme, which has enabled the company to increase production capacity to 1500 pairs of quality shoe lasts per day. The CNC machine tools are all based on NUM’s Flexium CNC platform, and are produced by the specialist Italian company, Newlast. Founded in 2002, Rupmaya Shoe Last Industries Pvt. Ltd has grown to become one of the largest manufacturers of adults’ and children’s shoe lasts in India. The company’s headquarters are located in Agra, and it also operates production facilities in Kanpur and Ambur, as well as a product development centre in Noida. Rupmaya’s customers nowadays include many of the world’s leading shoe manufacturers. Although it started out as a traditional craftsmen-based manufacturer, Rupmaya decided to transition to CNC machines at an early stage in the company’s development. An initial investment in CNC technology from the Far East proved unsatisfactory on quality and support grounds, so in 2017 the company procured a state-of-the-art shoe last milling machine from Newlast for evaluation purposes. Rupmaya was so impressed by the performance of the Newlast machine, and by the ease of control provided by the machine’s CNC system, that it took the strategic decision to differentiate itself from competitors by migrating all of its production facilities over to Newlast machines. The entire upgrade programme, which represented a major investment by the company, took three years to implement and was finally completed in 2020. Mayank Agarwal, director of Rupmaya, says: “We were the first company in India to use Newlast machines with their patented ‘SDF’ shoe last clamping technology. From the outset, the improvements in product accuracy and quality were apparent to our customers and quickly gave us a competitive edge. The control flexibility provided by NUM’s Flexium CNC systems makes the machines extremely easy to set up and use – our operators only need a few days of training. We are currently running three production lines simultaneously, giving us the capacity to craft over 1,150 pairs of lasts, as well as more than 350 pairs of samples, every day.” Rumpaya’s production facilities make extensive use of Newlast’s latest generation SDF HS machines, which can finish three pairs of plastic or wooden lasts automatically during a single working cycle. Rajesh Nath, managing director of NUM India, comments: “These machines, which are based entirely on NUM’s open architecture Flexium CNC platform, have 9 interpolated axes and are capable of producing about 45 pairs of highly accurate, fully finished shoe lasts per hour.” www.num.com Advanced multi-axis CNC machine tools for Indian manufacturer