Mixing Mill - A story of woes to wows!!

Updated Criterion Checklist To Select Your Two-Roll Mill Inside

Machinery World

Rubber & Tyre Knowledge On-The-Go Special Supplement

http://rubbermachineryworld.com

A New Generation Mill

Fil

e P

ictu

re F

rom

Wik

i

MIXING MILLA Story Of

Wows!!Woes To

Two-Roll Mixing Mills have been in existence since the

time mixing of rubber started for various applications.

It is still a sacred machinery for the rubber processors.

Hence, we had to think thrice or even more before we

decided to write a feature on this machinery.

The theme ‘The Story of Woes To Wows!!’, I think, is a

true reflection of what this popular rubber machinery

has morphed into. Modern mixing mills are rich in

features, safe and automated as compared to ancestors.

(This edition’s cover page sums up this contrast well!).

Our first attempt at a concise Knowledge On-The-Go

special supplement was a success. Thanks to each of you

- esteemed readers and supportive advertisers, for

reposing faith in our abilities.

It’s fascinating to us, when you take your valuable time

to pen us your comments and shower generous words

of appreciation. The immediate result is what you see

here - our team is emboldened. We redesigned the cover

of our special supplement to differentiate our look,

articulate our approach better and more importantly,

reinforce our commitment to you.

At Rubber Machinery World, we understand your

information requirements and hence our efforts to share

authentic information on this portal to help you source

your machinery wisely is serious, I reassure you.

In this edition, we have also included from our portal, an

updated checklist to help you select the right mill.

As always, I welcome your feedback on

[email protected].

BestRegards

Prasanth Warrier

| Editor’s Note |

Most Popular Rubber Machinery

We redesigned

the cover of our

special supplement

to differentiate our

look, articulate our

approach better

and reinforce our

commitment to you.

3

rubbermachineri

rubbermachineryworld

+Rubbermachineryworld1

grp/home?gid=8252803

rubbermachineri

Special Supplement - Rubber Machinery World SEP 2015|

4

File Image: A Mill Working Inside A Factory (Source: Wiki).

Special Supplement - Rubber Machinery World | SEP 2015

| MIXING MILL |


5

MIXING MILL A Story Of Woes To Wows!!

Mixing Mills have been in

existence since the time

mixing of rubber started for

various applications.

Interestingly, the world's

first rubber factory was

established near Paris in 1803.

A Two-Roll Mill is the oldest

and simplest type of rubber

mixing machinery. You could

use these machines for

different processes such as

mixing, sheeting, plasticizing

and warming of the rubber.

Some applications include

using as Dump mills below an

internal mixer for compoundi-

ng and sheeting-out; Warm-up

and feed mills for calendars

and extruders; Re-mixing Plain

compounding and Mixing.

Despite its versatility, they

were extremely painful to

work with. Because a basic

mixing mill operation is dirty

and provides a poor working

environment that is equally

polluted. Lengthy mixing cycle

Prasanth Warrier

| MIXING MILL |


File Image Of An Operator working on a Mixing Mill at Dunlop Factory

leads to higher time

consumed. As a supervisor,

your productivity from this

equipment is dependent on

your operator skill. Cutting

down hot rubber many

times, rolling the sheets and

feeding them back into the

nip gap of the mill rolls is a

physically demanding task

for the operator. And from a

quality perspective, you

could have batch-to-batch

variations creating undesired

headache.

Veteran compounders who

have worked on mixing mill

will closely relate their

painful experiences to the

above statements. Nothing

could be farther than the

truth as the file picture on

this page clearly articulates

the woes of a mixing mill

operator inside a plant.

6

| MIXING MILL |


| MIXING MILL |

Mixing & Compounding

Operation:

When mixing on a mill, you

place the polymer between

the rolls. It is processed until

the polymer forms an even

belt around one of the rolls

with a certain amount of

excess compound on the top

crevice where the rolls meet.

You then add fillers, plastici-

zers and other chemicals

gradually to the “mixing

zone” between the rolls.

Some chemicals fall down

into the tray below the mill

rolls and your operator must

then collect it and feed back

into the mixing mill again.

Finally, when you have inco-

rporated all the non-curative

ingredients, curing agents

and accelerators are added.

The total mixing time often

is upto at least 30 minutes for

a batch size of approx 100 kg.

Opinion varies even today.

While everyone agrees that

good compounding requires

good dispersion, some argue

that good dispersion come

only with internal mixers.

While other users claim that

for a particular recipe, there’s

no better equipment than

mixing mill.

Says, Amardeep Singh

Bharaj, Director (Sales) of

leading rubber machinery

manufacturer, Bharaj

Machineries Pvt Ltd, “A

rubber mixing mill is no

more just a mere machine

with two rolls moving and

rubber going in, coming

out with flaws like

running on high torque

and consuming high units

of electricity and majorly

breakdowns due to Bushes

and Gears.”

It is in this context that

we track the modernizat-

ion or technology impro-

visations in mixing mills.

Modernization And

Technology Changes

With evolving times, the

manufacturers have

devised ways to address

8

the shortfalls of working

with mixing mills.

Says, Eldad Eilam, Co-CEO

of Pelmar Engineering

Limited, leading world-

wide suppliers of rubber

and tyre machinery, “The

industrial mixing mill may

have not significantly

changed over time from

design point of view. Yet, it

has introduced many

mechanical improvements

and electrical upgrades to

meet the on-going demand

coming from customer for

enhanced processing, safety

and automation.”

It is said familiarity breeds

contempt. And, hence this

could be a reason why we

consider two-roll mills as a

low technology product

and automatically assume

that anybody can

manufacture them.

Is this true?

A Mixing Operation On A Mill


| MIXING MILL |

Explains Amardeep Singh Bharaj, “Rubber Mixing mills

today are very smart and energy-efficient machines

providing highest levels of quality as required. The

whole perception has changed. Rubber mixing mills,

being the heart of rubber factory in terms of providing

rubber to ancillary equipments like calendars/extruders

/moulding presses, is taken very seriously in terms of

Rubber Mixing mills today are very

smart and energy-efficient machines

providing highest levels of quality

as required. The whole perception

has changed. Amardeep Singh Bharaj

Director (Sales)

Bharaj Machineries Pvt. Ltd.

Image: A 60" Mixing Mill With Advanced Features,

Controls, and Automation from Bharaj Machineries.

9


Modern mills now have peripherally

drilled rolls for better cooling and

temperature control, bearings with

minimal friction, compact operator

friendly design which also saves

space, simple base frame for easy

installation, and hydraulic nip

adjustment for safety of machine

parts in the event of overload

| MIXING MILL |

of roll ratios for better mixing

quality, Rolls temperature

controlling systems for high

level quality controlling of

compounds, improved safety

features like emergency brakes

/auto reversing systems for

operator safety, precise button

operated nip gap adjustment

systems for perfect sheet

thickness, variable speed

drives for hard to process

compounds and fully

automated mixing cycles

through PLC and energy

graphs to analyse the power

consumption which makes

the user smart and

competitive to know where

one stands.”

Philip Thomas

Managing Director

Kelachandra Machines

10

Adds Philip Thomas,

Managing Director of

Kelachandra Machines,

“Modern mills now have

peripherally drilled rolls

for better cooling and

temperature control,

bearings with minimal

friction, compact operator

friendly design which

also saves space, simple

base frame for easy

installation, and hydraulic

nip adjustment for safety

of machine parts in the

event of overload”.

Kelachandra Machines

manufactures rubber

industrial machinery.

There are instances today in

the industry where two-roll

mills are not meeting the

expectations of the customers.

The fault lies on either side –

end users failed to draft the

technical specifications

properly and manufacturers

failed to understand the

expectations properly.

After all a two-roll mill is

only a two-roll mill, isn't it?

How complicated can it be?

The fact that each component

going into the mill needs to

maintain the physical and

dimensional integrity is taken

www.pelmar.com

Your Partner World-WideFor Rubber And Tire

Machinery

• PRE-OWNED • NEW • REFURBISHED

Are you seeking affordable and durable machinery?

For tire production, tire retreading, tire recycling, hoses,

automotive parts, flooring and covering, conveyor belts

manufacturing and other technical rubber goods.

Discuss with us for your requirements of

- Single Machinery - Spares

- Complete Lines - Turnkey Solutions

You may choose from our varied stock in of 17 locations

USA, Europe, Middle-East and India that includes Mixers,

Mills, Calenders, Cutters and Splicers, Extruders, Curing

Presses, Tire Building Machines (TBM), Testing and

Finishing Equipment, Injection Molding Machines as well

as Laboratory equipment.

Through our in Germany, UK, 8 fully owned subsidiaries

USA, Italy, India, China, Spain and Turkey; we provide you

with any type of rubber machinery, tire equipment and

engineering services.

Subscribe to our Newsletters for the latest inventory

catalogue and best equipment deals. For more info, visit

Or email us at [email protected]


| MIXING MILL |

for granted. Any mismatch can

lead to recurring problems

resulting in downtime and

causing loss of production.

Informs Eldad Eilam, “In

terms of processing, new drive

technologies, coupled with

peripherally drilled rolls are

used to enable processing of a

broader range of elastomeric

compounds by better control

of the temperature and ability

to make different compound

characteristic by easily

changing the friction.”

Let's examine a few

developments these leaders

are speaking of.

Drives

The new mills that are

manufactured today adopt

compact direct drive where

the gearbox output shaft is

coupled directly to the roll.

Bull gear-pinion that

consumed more power,

made noise and vibration

has become obsolete.

There are also uni-drives

where two output shafts

from the same gear-box

drive the two rolls. The

external connecting gears

are absent here making the mills appear more aesthetic

and compact.

Then, there are independently driven rolls where each

roll is connected to an individual gearbox taking power

from individual motors. The advantage is that variable

friction ratio can be obtained for different recipes.

A hydraulic drive is another upgrade that saves power

though comes with higher initial capital investment.

12

Image: Different Configurations of Independent Drive


| MIXING MILL |

Stock Blender:

In a discussion and exchange

of thoughts on this subject

recently on LinkedIn platform,

veteran compounders have

vouched on the “immense

value” a stock blender

provides to a mixing mill. Not

surprising, as Eldad Eilam

adds “Use of a stock blender

reduces dependence on

operator skills; provide better

and consistent productivity to

achieve the desired batch-to-

batch uniformity”.

A main disadvantage in

mixing on a two-roll mill is

that the process is dependent

on your operator skill.

A Stock blender enhances

efficiency and productivity

through reduced operator

fatigue because this accessory

eliminates the demanding

task of cutting down hot

rubber many times, rolling

the sheets and feeding them

back into the nip gap of the

mill rolls.

The operator also benefits

from a safe work

environment.

The Stock Blender is an add-

on accessory mounted on top

of an open two-roll mill.

13

It aids in rubber blending by pulling the mix compound

from the front roll of the mill and guiding it to the nip gap

between the two mill rolls.

A stock blender helps in homogeneous mixing and

repeatability of the mixing operations. They are also used

on pre-warming mills before feeding the rubber sheet to a

Calender.

Nip-gap Adjustment:

A motorized / hydraulically actuated nip-gap adjustment

Image: CE Certified 6"x13" Lab Mill with Variable Friction

Ratio, VSD, Digital Nip-Gap display and Temperature

Controlling Mechanism (By Bharaj Machineries)

Image: 84" Mixing Mill With Stock Blender from

Kelachandra Machines.


| MIXING MILL |

improves precision and

facilitate faster nip setting for

multiple recipes. This can

further be automated to have

'preset nip gaps 'obtained at

the press of a button on the

operator panel. Nip Gap can

be controlled / measured in

electronic devices.

Informs Sugundhan

Nagendhran, Solutions Head

of Base Automation

Technologies Private Ltd,

“We can monitor the nip gap

with suitable sensor installed

in the machine.”

Stock Guides

The movement of stock

guides can be made

pneumatically or

hydraulically actuated for

faster movement and

precision.

The shape of the stock guides

in such uses may be modified

to make the rubber flow

always to the centre of the

rolls so that the compound

does not seep sideways

prolonging the mixing

process further.

Rolls

Roll selection for a mixing

mill is of decisive importance

for the quality of many

high-tech products

manufactured by the

rubber industry.

Generally, these rolls are

made of Chilled Cast Iron

(CI) through a process of

vertical casting. Chilled CI

has greater resistance to

deflection and uniform

heat transfer

characteristics. Depending

on the presence or absence

of alloy, the hardness of the

outer working (chill) zone

could be in the range of

460-650 HV with a

thickness 12-20 mm.

As these rolls operate at

high speeds, precise

concentricity with proper

balancing of rolls is a pre-

requisite for efficient

utilization of material and

energy.

The surface quality of the

rolls is crucial for the

products to be produced.

The smoother and more

precise the rolls, better the

product.

Viscous deformation of the

rubber compounds occurs

between the rolls of mills

during mixing and

mastication. This generates

heat that needs to be

removed through effective

cooling. Hence, water

circulation passages for

cooling are an essential

feature of the roll design in

rubber mills.

14

We can monitor the nip gap with sensor

installed in the machine.

Sugundhan Nagendhran

Solutions Head

Base Automation Technologies Pvt Ltd

A Lab Mill From Pelmar

AMCL MACHINERY LIMITEDSERVICE TO THE NATION FOR FOUR DECADES

For all your enquiries please contact:

AMCL MACHINERY LIMITED Works: Plot No.A1/1, MIDC, Butirobi-441122, Nagpur

Mumbai office: 202, Ackruti Centre Point, MIDC Central Road, Andheri (East), Mumbai-400 093.

Contact person: Mr. S.H. Mehta

Mobile No. +91-9004697430. Email: Website: www.amcl.in [email protected]

• Rubber Mixer – 76" liter and 270 liter.

• Mixing Mills – 16", 22", 26" and special sizes

• Hot feed extruders – 6" and 8"

• Rubber Calenders – 2/3 rolls.

• Bias Tyre Building machine – RB1/RB3

• Automatic LCV Tyre Building Machine – RB1619

• Automatic Truck Tyre Building Machine-RB2022

• Mechanical Tyre Curing Presses – Scooter to Truck size

• Bladder Curing Presses

• Tube Splicers

Product Range


| MIXING MILL |

These passages allow a pre-

defined circulation of the

cooling agent (mainly water)

and ensure that the

temperature can be kept

within a prescribed tolerance

over the entire face length of

the rolls.

Two designs are normally

available – centrally cored

rolls and peripherally drilled

rolls. Peripherally drilled

rolls are possible for

diameter greater than

150mm (or 6 inches).

The efficiency of heat

transfer is relatively higher

in the case of peripherally

drilled rolls than in centrally

cored rolls due to close

proximity of the water

channels to the roll surface.

In peripherally drilled rolls,

the passages for heat

exchange are provided

approximately 25mm under

the roll surface and can

vary nominally between

manufacturers.

The manufacturing

processes and costs involved

in producing a peripherally

drilled rolls is relatively

high, hence they are priced

higher than cored rolls.

Your choice of peripherally

drilled or cored rolls

depends on the quality of

rubber processing required

in mixing mills and the

marketability of your

rubber products for a price

16

The efficiency of heat transfer is relatively

higher in the case of peripherally drilled

rolls than in centrally cored rolls.

that profitably covers your

investment.

Safety

Various safety devices have

also been improved and

implemented in new mills

with special attention to

operator protection in mind.

Sugundhan Nagendhran,

cites “Whenever the

emergency switch is

pressed, the mill will rotate

in the reverse direction

(half circle) to avoid

hazards of crushing the

hand.”

Image: Mixing Mill Rolls (Courtesy: Web)


| MIXING MILL |

Automation and Integration

All your mechanical

improvements and add-ons

will benefit you best when

they are automated,

integrated and safe.

Depending on your

requirement a high level of

customization is possible.

Amardeep Singh Bharaj,

says “Automated PLC

features helps to analyse

mixing cycles and

productions time and this

makes the machine self

sufficient and not labour

intensive.”

While Sugundhan

Nagendhran adds

“Normally, in the mixing

mill the sheeting time of the

compound is left to the

operator; excess sheeting of

the compound will lead to

compound scorch; while less

sheeting will lead to

improper mixing. To avoid

this, the sheeting mixing

time can be monitored as per

the recipe sequence and once

the sheeting time is reached

the system will raise the

alarm to stop and guide the

operator to take the

compound.”

Today, there is integration

possible between the Master

Batch (MB) sheet addition

and Finals chemical addition

into the mixing mill.

Explains Sugundhan

further, “This means adding

the Final Batch (FB)

chemicals at the right time

and right step is very crucial

in the mixing. The FB

mixing system is integrated

such a way that, the system

will monitor the sheeting

time and record the KW

consumed and it will

indicate the correct step to

add the FB chemical to the

mill. To ensure the 100%

addition of chemical, the

event of taking the chemical

bag from the weighing scale

is recorded and a photo-

sensor will be deployed

above the mill to ensure the

operator have dropped the

chemical at the right step

and time.”

When you are considering

a mixing mill in a mixing

room, there are major

developments.

Image: Mixing Mill With Hydraulic Drive at PTE, Germany

Automated PLC features helps to analyse

mixing cycles and productions time and

this makes the machine self sufficient

and not labour intensive.

17


| MIXING MILL |

Explains, Ashutosh

Chincholikar, Business Head

of Smart Controls India Ltd,

“Mixing Mill Automation

today has gone a sea change

as compared to what was

available few years back.

Earlier, recipe-based

weighing and mixing was

considered something

ultimate. But now we talk of

a Mixing Room Automation.

This means it has moved to a

fully integrated system that

integrates the Carbon

Handling System, Mixer

upstream, Mixer, Mills and

the Batch off. Not only that,

we also have the labs

integrated in this solution as

well. Further, we have

Advanced Process Control

giving greater efficiency and

better batch to-batch

uniformity in spite of the

varying properties of the Raw

Material.”

This has helped the users in

terms of a more efficient and

integrated system that can be

completely managed from

one room.

Ashutosh Chincholikar

probably knows the best on

automation and integration,

because Smart Controls India

Ltd is pure integrators and

their solutions are based on

state of the art products from

Siemens. He further adds,

“We have an ability to

integrate almost any kind of

control system with our

Mixing Line Controls that is

based on Siemens platform.

The biggest advantage we

offer is that we are not

machinery suppliers. Yet we

18

understand the Mixing

Machinery very well, be it

Mixers or Upstream or Mills

or batch off. We possess

good skills on IT integration

as well. So the Mixing

solution can be connected to

the business platforms like

SAP or Oracle.”

Mixing mill integration with

Mixing Mill Automation today has gone a

sea change as compared to what was

available few years back. Earlier, recipe-

based weighing and mixing was

considered something ultimate. But now

we talk of a Mixing Room Automation.

Ashutosh Chincholikar

Business Head

Smart Controls India Ltd.


| MIXING MILL |

other machinery like

mixer and batch-off is easy

and affordable. However

there are challenges. Says,

Ashutosh Chincholikar,

“Lot of decisions at the user

end need to be taken

correctly. But in general,

there are two options

available with the user.

First option is to engage one

single company that takes

the total responsibility of

supply of all machinery

and controls related to

Mixing. This includes

machinery like Mixer,

Upstream, Drives & Motor,

Mills and Batch off. This

option relieves the user to a

very large extent and the

responsibility of integration

of all the Automation

systems lies with this

turnkey supplier. Obviously

the cost goes high with such

option but if we talk of the

paybacks, then it's a good

option to choose.

Second option is to choose an

integrator, who also works

like a consultant giving

detailed configuration of the

control systems each

machinery supplier should

consider. The integrator then

supplies the Master Control

System that integrates Mixer

Controls, Upstream Controls,

Mill Controls, Batch off

Controls and Drives. This

integrator should be a

Control System supplier

with a very good knowledge

of Rubber Mixing Process.”

Speaking broadly, second

option is more popular and

a smart option for you to

consider.

Should You buy New,

Pre-Owned Mixing Mill

or Rebuild a Mill?

Mixing Mills are critical

machinery in any rubber

factory.

You can have a variety of

Moulding machines /

Extruders and other

ancillary equipments but

rubber mixing mills are

definitely a prime source

20

or providing semi-finished

rubber in technical rubber

goods industry.

A mixing mill is generally

designed for long life. Thus,

it is normal when you will

choose to upgrade your

existing old mill or you

observe a substantial

demand for Used or

Pre-Owned Mixing Mills.

How do you decide?

Emphasizes Amardeep

Singh Bharaj, “We

encourage our buyers to

invest and buy any capital

safety system equipment

keeping in mind key factors

like Electricity cost, Labour

cost and maintenance cost.

The machines offered today

by Bharaj Machineries are

Uni-drive type and only

with high quality

Anti-Friction roller-bearings

Image: 42" Compact Mixing Mill from Pelmar Engineering


| MIXING MILL |

We often recommend our customers to

get the machines fully reconditioned

with the most up-to-dated controls and

equipped with advance features in order

to enjoy additional lifetime assurance of

reliability and ensuring its long

operational life.

which help one save up to

20% power compared to

old machines. Lubrication

systems are automatic so

you don't need skilled

labour to maintain and

keep an eye on them.

Automated PLC features

helps to analyse mixing

cycles and productions

time and this makes the

machine self sufficient and

not labour intensive.

Having the said features

will help any buyer get the

best ROI in terms of power

saved, practically Zero

Break-down/ Production

losses and Consistent

quality output.”

Eldad Eilam has a

differentiated view and

says, “The answer lies on

the customer preferences

and constraints in terms of

budget and delivery time,

which may vary subject to

scope of the work. We often

recommend our

customers to get the

machines fully

reconditioned with the most

up-to-dated controls and

equipped with advance

features in order to enjoy

additional lifetime assurance

of reliability and ensuring its

long operational life.”

Philip Thomas articulates,

“We usually recommend a

mix of reconditioning and

new components /

upgradation. However, this

depends upon the

customer's budget and

what parts are actually

available along with the

machine to be

reconditioned and what

parts are missing. We are

working on the possibilities

of converting old cored

rolls to peripherally drilled

and bush bearings to

antifriction roller bearings

to improve on cooling,

power consumption and

efficiency of old Mills

currently in operation.”

In reconditioning, it is also

Eldad Eilam

Co-CEO

Pelmar Engineering Limited

21


| MIXING MILL |

22

normal when the rebuilders

strip out the machine and

find it in satisfactory

condition, they will only

recommend a minor

replacement of components

and new painting to provide

the mill with new

appearance.

Future of Mixing Mills:

The changes in rubber

compounding demands and

continuous improvements

in processing chemicals will

direct the usage in future.

While Philip Thomas opines

“From the application point

of view, in certain cases

there is a present trend of

replacing a Mill with for

example a dump extruder.

However, the blending

quality in my opinion is

better in a Mill”.

Mixing mills will continue

to be relevant rubber

machinery in various

product sub-sectors and

there would be demand for

further automation.

Eldad Eilam says, “In the

next decades, we foresee

improvements meant to the

safety and automation

aspects of the mill. The

level of use will probably

be increased and we

anticipate technological

progress in drive solutions

related to the continuous

need for improved

performance and savings

in energy and manpower.”

Amardeep Singh Bharaj

also views it similarly,

“Mixing mills will need to

have Variable Friction

Ratios, so customers can

easily process different

rubbers in one machine

with easy change in Friction

ratios through push of a

button. Peripherally Drilled

rolls will also be in huge

demand as temperatures of

rolls need to be controlled

keeping in mind the nature

of different compounds to

be processed on the

machine. Safety regulations

will be more stringent so

the machines will need

better safety systems as

time demands.”

Concluding, Two-Roll

Rubber Mixing Mills are

available with different

attachments and equipment

as per the kind of raw

material to be blended.

They are no more “simple”

and a proper planning of

the requirements and

drafting of specifications

can help you acquire

optimized technology for

your mixing process –

removing your “woes” to

you exclaiming “wows!”. RMW

Mixing mills will continue to be relevant

rubber machinery in various product

sub-sectors.

Image: A Rebuilt Mixing Mill

KELACHANDRA MACHINES(MFRS. OF RUBBER INDUSTRIAL MACHINERY)

Chingavanam - 686 531, Kottayam, Kerala. India.

Phone Off: +91- 481-2430325. Fax: +91- 481-2430596

e-mail: [email protected]

Two-Roll Mill: Questionnaire cum Checklist To Select Your Right Machinery

Ever been in a situation, where you

wanted to buy a two-roll rubber mixing

mill but did not know the crucial questions

to ask the supplier? Or terrified with the

different formats of techno-commercial

offer from various suppliers?

Or flummoxed by what basic features

really are required to meet your mixing

operation? Or even more confused to

decide on the different features offered on

the mil?

Yes!!

Well, then you need a ready-reference-

sheet of selection criteria to consult with

the mixing mill supplier and have an

intelligent discussion with your

machinery salesman.

Some criterion on this check list are

optional while most are crucial to aid you

decide well. After the baseline requirem-

ents of your two-roll mixing mill are

frozen, insist your potential suppliers to

give you a quote focused on these needs.

Of course, there are developments in two-

roll mill. If your supplier offers additional

features, treat them as options or extras to

your core requirement. Subsequently, you

can compare on various brand factors –

including workmanship quality, supplier

| SELECTION CRITERION FOR TWO-ROLL MILL |

Buying lowest priced mill without

focussing on the features you need

for your rubber mixing operation

will lead you to post-purchase

discontent.

reliability, product aesthetics & durability,

after-sales service and spares support to

your market, price and discounts, etc to

decide the most suitable supplier.

Buying a lowest priced mill without

focussing on the features you need for your

rubber mixing operation will lead you to

post-purchase discontent.

Adopt this Two-Roll Mill Selection

Questionnaire and avoid buyer's remorse.

Image of a Mixing Mill With Stock Blender

24


Rubber And Tyre Machinery

Now Has An Online Address

http://rubbermachineryworld.com

FREE Access On All Your Devices

- Power Your Business Forward With Authentic Information

On

- Equipment & Allied Machinery

- Technology

- Equipment Suppliers

- Read, Absorb & Implement Ideas From

- Insightful Interviews Of Leaders

- Informative Articles

- Special e-Editions & e-Books

- Short Updates Curated from the World Of Machinery Every

Thursday In Your Inbox

- Resourceful Downloads For Day-to-Day Use

- Plan For Your Conferences & Expo from event dates

- Book Store with Best Rubber Books For Your Quick Buy

- Key Documents/Directories to take Powerful Business

Decisions Available For Purchase.

- Left-Oriented Clean Layout for your easy reading.

- Follow Us on Twitter, Google+, LinkedIn & Pinterest.

http://rubbermachineryworld.comAUTHENTIC INFORMATION TO SOURCE MACHINERY WISELY

Attention: Equipment Buyers & Users

JOIN OUR READERS FROM 68+ COUNTRIES

SUBSCRIBE TODAY FOR FREE & BENEFIT


Criterion Please Answer Descriptively if needed

Production Requirement: ___________________ Tons/Hour;

___________________ of 8 hour Shifts/Day

What is your expectation from this Mill? (Please tick appropriate boxes)

Warming/Pre-heating (before feeding into next stage) Mixing (for thorough blending of compound) Dump Mill (below mixer/kneader) Sheeting out Refiner Mill Cracker Mill (with corrugated rolls for breaking cold

rubber sheet) Others

If Others, please specify:

Mill Size (Roll Diameter x Length)

___________________ MM x ___________________ MM

Type of Mill: (Please tick)

Both Rolls Plain One Roll Corrugated Both Rolls Corrugated

Roll Type: (Please tick)

Both Rolls Centrally Cored/Bored Only one Roll Peripherally Drilled Both Rolls Peripherally Drilled

Friction Ratio Required(Optional)

Nip Gap Adjustment Manual Motorized Hydraulic


26

27



Mill Speed: (RPM/MPM) (Please fill and tick)

___________________ RPM; or Roll Surface Speed of ______________ MPM

Variable Speed (VFD) Motor required for different speed

Mill Stock Guides (Please tick appropriate boxes)

Fixed Pneumatic Movement Motorized Movement Hydraulic Movement

Mill Gearbox / Reducer(Please tick)

Unidrive (Gearbox to have single input shaft/double output shaft)

Semi Unidrive (Connecting Gear on Mill Rolls) Independently Driven Rolls with Variable Friction

Ratio

If you have any Service Factor (SF) specifications, note here or discuss with the manufacturer without fail.

Accessories/Features Required : (Please tick)

Temperature Control Unit Stock Blender LVDT for nip gap measurement Emergency Stop features Others

If Others, please specify:

Details on any major components that are of abrasive or heat sensitive nature in your recipe(Optional)




Any other inputs you wish to share on your need.

(For example, brands of electrical, hydraulic components, or lubrication requirements, etc - Optional)

This article was first published on Rubber Machinery World Information Portal. You can

access the link to original on:

http://rubbermachineryworld.com/2015/02/20/two-roll-mixing-mill-criterion-check-list-for-

buyers/RMW

Did You Know?

Global research from the CMO Council reveals that 88 percent of business buyers believe

online content plays a moderate to major role in supplier selection.


2. PRODUCT ZONE Edition

Promoting One Product At A Time...Differently.

3. KNOW YOUR SUPPLIER Edition

Advertising One Supplier At A Time...Differently

1. TECHNOLOGY & INNOVATION Edition

Communicating One Technology At A Time...Differently

Ru

bb

er

Mach

inery

Wo

rld

Technology

&

Innovation

M MRUBBER Rubber

Machinery

World

Tec

hnol

ogy

& I

nnov

ati

on

Pro

du

ct Z

on

eR

ub

ber

Mach

inery

Wo

rld

Product�Zone

M MRUBBER Rubber

Machinery

World

Know Your Supplier

Rubber Machinery

& Accessories

Pracsol Chemicals & Machinery

M MRUBBER Rubber

Machinery

World

Special

Edition

In Conversation With

Harish Nene, Chief Executive Ofcer

‘Practical Solutions’ on Equipment

Simplified

Know

Yo

ur

Su

pp

lie

rR

ub

ber

Mach

inery

Wo

rld

Ru

bb

er

Mach

inery

Wo

rld

Top 25 Things You Should Know to Discuss with Mixer Rebuilder

HOW TO SELECT YOUR

RUBBER & TYRE MACHINERY?

Jacob Peled

Pelmar Engineering

Andreas Limper

HF Mixing Group

Peter Haan

Siemens AG

Arul Shanmugavelu

L&T - Kobelco Machinery

Harish Nene

Pracsol

Rakesh Sharma

AMCL Machinery

Insightful Advices From 6 CEOs

Insid

e

M MRUBBER Rubber

Machinery

World

Special Supplement

PLUS

BUYERs SPECIAL

On One Key Topic

At A Time

...............Differently

M MRUBBER Rubber

MachineryWorld

Promote�Your�Brand�On

REACH 3X...DIFFERENTLYOnly on http://rubbermachineryworld.com

Thru Buyer-Oriented Editions To Market Your Equipment Solutions Differently.

28

A Story

Every Has....Machinery

Every Has... Technology

And

As A , You Denitely Have...Equipment Supplier

Which One is Your’s Today?

Promote Your Brand Through Stories on

Equipment, Technology, Innovation & More

With Buyers From Over 68 Countries Only On

M MRUBBER Rubber

MachineryWorld

Equipment Marketing Redefined

Contact: [email protected]

Email: [email protected]

Website: http://rubbermachineryworld.com

©2015 – ePublished by Rubber Machinery World in Sep 2015 Content For Free eDistribution & Download

SELL MOREM MRUBBER Rubber

MachineryWorld

WHEN BUYERS VISIT FOR

AUTHENTIC INFO ON MACHINERY

Promote Your Brand On