ROLLER HEAD UNITS

Roller head unit that has advantageous characteristics superior to the conventional calender system

The roller head unit consists of a single or duplex extruder, a die head, and a vertical two-ball calender with head clamping devices. The broad width head and calender form the rubber compound into a sheet of uniform thickness, which can be varied from 0.5 mm -20 mm or greater in thickness. Nakata roller head units provide significant benefits over conventional calender systems in the production of inner liners, rubber sheets, V-belts, and elastic components.

ROLLER HEAD UNITS | Line-up

AUTOMATIC SLEEVE EXCHANGE ROLLER HEAD UNIT

The sleeve exchange roller head unit is used for profiled inner liner production for passenger, truck, and bus tires. The top roll of the calender incorporates a sleeve, which can carry a profile form. There is an automatic system for storing, preheating and changing the profiled sleeves within three minutes, resulting in high overall productivity and safety. There is an automatic extrusion pressure control system to ensure the accurate thickness of profiled inner liners or profiled sheets in thickness from 0.5mm - 20mm. The unit is ideal for producing air bubble-free profiled inner liner for truck, bus and passenger car tires.

A wide variety of exchange mechanisms for different needs and applications

Nakata sleeve exchange roller head units are capable of offering both automatic and manual exchange depending on the customer’s operating environment. In the case of automatic exchange, all processes from insertion to and removal of the sleeve from the preheating furnace, to sleeve exchange, can be carried out automatically, resulting in an apparatus that excels in both productivity and safety. Manual exchange employs a specialized C-type hanger, allowing easy attachment and removal of the sleeve.

Automatic sleeve exchanging system
Manual sleeve exchanging system
Manual sleeve exchange machine part

DUPLEX ROLLER HEAD UNIT

The duplex roller head unit consists of two extruders, a die head, and vertical two roll calender. The rubber is evenly distributed in the die head over its entire width, and is then fed into the calender nip. A feedback system of control varies the RPM of the extruder screw or calender speed so that high quality rubber sheet (up to 2300 mm wide) can be produced in thickness from 0.5 mm to 20 mm or greater.

ROLLER HEAD UNITS | Specifications

Major Specifications of Extruder and Roller Head System

This table can be scrolled horizontally.
Extruder
size
L/D Motor
-capacity
kw
Sheet head 
aperture
Calender
roll
Product
sheet
Width
(mm)
Height
(mm)
Roll
diameter
(mm)
Surface
length
(mm)
Width
(mm)
Thickness
(mm)
300 6 200 1850 30 <600> <2000> 1450 1.5〜9
250 18 450 2300 28 700 2500 2200 1〜15
200 18 300 1300 28 500 1500 1200 0.5〜4
150 16 200 1050 28 400 1300 270〜 0.5〜5
120 16 110 700 10 500 1500 1250 0.1〜1.0
90 16 45 600 22 310 900 500 1.5〜5
75 14 30 550 8 400 700 550 0.2〜2.0
60 10 18.5 185 5 200 250 100 0.5
45 10 7.5 95 3 120 150 100 0.3〜2
30 10 4.4 30 3 80 48 40 0.5

MINI ROLLER HEAD UNIT

This unit can be used for the high speed profiling of small, thin gauge tire components, which can be used for direct application by strip winding to tire assembly units. This unit also can be used to produce small, thin gauge sheet for non-tire applications.

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