Home  |   Contact Us  |   Karir
Home   »   Produk   »   Bench / Floor Tester
 

Service & Support






Download Brosur alat uji
 
Banner April Promo
Banner Dealer2
Banner Dealer
SEMINAR ON GEOTECHNICAL & STRUCTURAL HEALTH MONITORING
Seminar dan Workshop
1 2 3 4 5

Simplified super calender 25FC-100E

 

Calendering is performed in the finishing process of raw paper or coated paper. This process gives gloss to paper surface, improves smoothness and adjusts sheet thickness. Various mechanical constructions and roll composition are used for specific purposes. They are classified broadly into three kinds of combination: metal and metal rolls (machine calender), metal and elastic rolls (super calender), and metal and resin rolls (soft or gloss calender). It is desirable to select a test calender most suitable for the intended purpose, considering many items including material used, paper width, linear pressure, temperature, pressurizing method, heating method, sheet paper or continuous paper.

Feature

  1. In the KRK test calender, the bearing case on each side of the top roll is supported by a pin joint. The friction area is smaller than that of the vertical sliding support system. This design avoids uneven pressure between nips on both sides, constantly applying stable pressure on the test sheet.
  2. With the conventional machine calender, forced driving of the top and bottom rolls are performed by gear transmission. This results in weaker nip on the gear side, causing uneven pressure distribution. The KRK calender uses, instead of the direct gear drive, a special driving system and a unidirectional clutch. This design ensures smooth operation with stable nip, both in forced driving (non-contact between upper and lower rolls) and driven operation (contact between upper and lower rolls).
  3. When a machine calender is used for adjusting sheet thickness, a clearance setting system is necessary. The KRK calender is designed with a roll interstice adjusting system; setting on a gauge of 0.01 mm increment ensures correct pressing.
  4. An offset device of top roll self-weight makes it possible to provide an accurate linear pressure as set on the pressure gauge on the control panel.
  5. The sheet calender is provided with a specimen introducing device below the bottom roll. The bottom specimen turns around the bottom roll to be introduced into the roll nip and pressed to be sent forward. Both upper and lower rolls turn outward on the operation side, avoiding potential of finger pinch, so operation can be safely done by one operator.
  6. Well arranged heaters ensure uniform heating temperature of the rolls, without temperature difference in different parts, center and both sides.

Spesification

Roll composition two rolls (steel, elastic)
Steel roll 150 mm in diameter, surface length 337 mm, special alloy steel, surface hardness Hs 860 + 20, hard chrome-plated and polished
Elastic roll 220 mm in diameter, surface length 330 mm; special white cotton roll, hardness (D type) 860 + 20
Effective surface length 250 mm
Effective surface length 20 to 100 kg/cm steplessly variable (in 250mm width)
Pressing method pneumatic
Pressurization each sheet
Press speed 3 to 12 m/min.
Accessories one set of control panel
Power source three-phase 200/220 VAC 15 A
Air source 0.5MPa
Outer dimensions calender 1185x555x1385 mm,
control panel 730x580x1175 mm
Instrument weight calender 545 kg,
control panel 92 kg