TECHNOLOGY | MACHINERY FRICTION TESTING
Accurate measurement of coefficient of friction
UK-based RDM says that its CF-200i inclined plane friction tester can be used to measure the coefficient of friction of various materi- als – including many types of plastic film and sheet. When replacing a roll of
flexible film on a high- speed packaging line, for instance, film that exhibits different friction may not run smoothly – which could cause alignment, snagging and running problems. The inclined plane
DRYING
Multi-hopper drying provides flexible and economic solution
Conair says that its Multi-Hopper Cart (MHC) system is an economical solution to central drying. The MHC features up to four dependable Conair CH Series mass-flow hoppers mounted on a light- weight pushcart. Even with the largest hoppers mounted, the cart is only 35in deep, which saves floor space and makes it easy to manoeu- vre. Material can be dried off-line, then wheeled where it is needed – or stationed remotely to supply material to multiple machines at once. There are two basic
46
tions – or those requiring higher temperatures, sup- ported by a Conair D Series Carousel Plus dryer with the DC-C Premium control package – the cart can be wired for power and individu- al heaters added to each hopper. Seven hopper
configurations. The simplest has hoppers only with an insulated integral welded manifold system for supply and return of dehumidified air from a central dryer. For smaller applications, it can also heat the material. For larger throughput applica-
FILM & SHEET EXTRUSION | May 2020
sizes are available, with nominal capaci- ties ranging from 18 to
201lbs. Carts are built in two sizes, accommodating either three or four hop- pers. A slide-gate discharge port prevents material leakage but facilitates easy hopper draining. �
www.conairgroup.com
method relies on measuring the angle of a slope upon which an object starts to slide. Instruments that do this employ a flat smooth bed fixed to a pivot, upon which a sled – of defined dimensions and mass – is placed with the test materi- als loaded. The bed starts in a horizontal position and is then moved by hand or powered, whilst an angle measuring device is observed. The CF-200i uses a fine
pitch motor – driven by PLC logic control – to provide smooth, vibration-free movement. An optical sensor reacts in millisec- onds, capturing the precise angle when the sled starts to move. The bed is made to a precise roughness and incorporates a clamp for holding the base sample. The sled is supplied with dimensions, mass and surface finish to meet the appropriate test standard. �
www.rdmtest.com
Small-scale production
and trials MTI Mischtechnik plans to showcase its range of laboratory mixers – with heatable and coolable mixing vessels – at Solids 2020 in June this year. The mixers are suitable for the entire scope of bulk material processing tasks including the production of trial mixtures and small-scale production batches in laboratories and technology centres. Applications range from masterbatches and compounds for the plastics and rubber industry, including the production of natural fibre com- pounds, to applications in the chemical and automo- tive supplier industries. MTI’s laboratory mixer
range includes the type M vertical high-speed mixers (working volume up to 28 litres), heating/cooling mixer combinations from the M/KMV series (working cooling mixer volume up to 51 litres) and the Unitec type UT vertical universal mixers (working volume up to 51 litres). �
www.mti-mixer.de
www.filmandsheet.com MIXING
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52
