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Autoquip, a provider of paint finishing equipment and services, has incorporated piston air motors manufactured by Huco Dynatork into its systems.

The company, which primarily provides robotic and automation systems for liquid paint spraying, selected piston air motors – rather than industry-standard vane motors – because they complement its flow control techniques and provide a suitable platform for it to build systems that have a good coating ability and cost efficiency.

’By including the Huco Dynatork product, we can substantially reduce compressed-air usage and ensure constant revolutions per minute of the agitator blade,’ said Mike Elberson of Autoquip.

The result is a better surface finish and lower running costs, according to the company.

Elberson continued: ’Historically, a vane motor has been used as the means to agitate paint and keep solids in suspension.

’But one of the main drawbacks of this type of motor is that it has low torque at low revolutions per minute,’ he said.

To rectify this, a 10:1 gear transmission is typically introduced to allow the vane motor to operate at a much higher speed than the blades.

As well as making the system more complicated, the payback is the excessive use of compressed air.

Additional lubrication is also required.

’We estimate that the compressed air used by a small vane motor to rotate mixing blades between 50rev/min and 100rev/min is in the region of 12-15scfm per day,’ said Elberson.

Based on 85 per cent compressor efficiency, the daily cost is USD5.50 to USD6.75 (GBP3.38 to GBP4.15).

By including the Huco Dynatork self-lubricating piston air motor, Autoquip provides its customers with paint spraying systems that cost USD0.85 per day to run.

The agitation system is also said to be less cumbersome as the air motor naturally provides high torque at low speed, negating the need for a geared transmission.

It is quieter in operation and, thanks to its dedicated controller, the air motor ensures process consistency.

The speed control of a vane agitator motor is achieved by manually adjusting the air pressure via a regulator.

However, the pressure required to maintain rotational speed depends on the paint tank level and the regulator cannot automatically sense the resultant load changes.

Agitators often operate within an enclosed system, where it is impossible for the supervisor to see the blade and determine the speed.

The resultant inconsistency in agitation speed can cause coating quality problems and loss of production.

Autoquip combines its air motor with a patented dual-mode air flow controller, also designed and manufactured by Huco Dynatork.

Elberson said: ’This monitors the flow rate of air to the piston motor and adjusts the upward pressure as the flow changes.

’This provides much more consistent speed, regardless of the required mixing torque,’ he added.

Huco Dynatork is a world-class manufacturer of flexible couplings.

Whether the need is for high torsional stiffness, generous misalignment capability, high-speed operation or a capacity for operating in push/pull mode, Huco Dynatork can help. And if your requirements fall outside our standard range, we offer a customised service and cost-efficient small-batch production. 

Our range is highly comprehensive, comprising membrane and bellows high-performance couplings; Oldham and Uni-Lat general-purpose motion control couplings; Single-Beam, Multi-Beam and Step-Beam brands; and jaw/spider and double loop light power drive couplings. We also stock stainless steel and plastic universal joints.

Although the design and manufacture of couplings remains the cornerstone of our business, this is just one of the company's five main product groups. Huco Dynatork piston air motors is one of them, the only brand that can be used for precision motion control. 

Our quality hallmark is also impressed onto a huge range of power transmission and motion control components that have distinct design and performance benefits over other products in the market. In addition to an extensive choice of stock gears, racks, ground shafts and spline shafts, the product programme also includes the comprehensive BSA range of leadscrews and ballscrews.

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