Independent machinery sourcing · Handover

rubber mixing mill

Rubber Mixing Mill Sourcing is an independent sourcing partner. Share the rubber compound family, batch mass in kilograms, quantity and destination so factory wholesale quotes can be compared. This site covers a two-roll open mill used to masticate and mix rubber, not a metal-cutting milling machine and not a steel rolling mill. We do not manufacture mills or sell as a brand-appointed reseller.

Request Factory Quotes Two-roll rubber mixing mill in a compounding bay during a factory survey

Choose a quotation route

Buyers usually arrive with either a frozen mill size or an open compounding problem. Both routes still need compound, batch mass, and destination before a factory can price a rubber mixing mill without mixing lab and production duties.

Defined specification

When roll diameter/length, target batch mass, friction ratio, and cooling-water duty are already written, send those figures so each factory restates gap range, speed in r/min, and included guarding on the same row. A published LINA-style table that lists millimetres, r/min, gap millimetres and charge kilograms is a field reminder, not this project’s rating.

Send requirements

Selection still open

If only the compound family and a trial batch mass are known, we still circulate viscosity behaviour, mixing sequence and required sheet form so bidders propose mill sizes instead of guessing. Adjacent internal mixers or calenders belong in the same inquiry only when you name them as extra scope.

Review sourcing steps

What changes when a compounding room switches rubber families

What changes between products?

Natural-rubber mastication, NBR oil-resistant mixes, and colour masterbatch each need a different roll-surface temperature, gap sequence and batch mass. A mill sized on one feedstock viscosity can still be the wrong work envelope for a hotter, stickier compound that must leave as a continuous sheet.

What must be cleaned or replaced?

Stock guides, mill knives, scraper blades and any stock blender paddles carry the previous colour or curative. Ask whether those items are quoted as spare parts or assumed to be plant tooling already on the mill table.

How is the first good output verified?

First-good sheet should use an agreed compound sample, a recorded mixing time (cycle time of the open-mill sequence), discharge temperature, and a visual or lab check for undispersed lumps. Throughput in kg per batch is not proven by roll diameter alone.

Duty questions that belong in the first rubber mixing mill brief

Which rubber compound and batch mass define the mixing trial?
Material entering the machine
Name the feedstock: polymer family, filler loading, oil or curative package, and expected viscosity so roll temperature and friction ratio can be discussed instead of guessed.
Required output
State whether the mill must dump a batched hide, feed a two-roll sheeting pass, or supply a downstream calender. Throughput must be tied to batch mass and mixing time, not a bare r/min figure.
Duty cycle
Hours per shift, number of compound changeovers, and whether cooling water is available continuously while rolls stay at the stated surface temperature.
Which responsibilities remain with the equipment supplier and buyer?

The supplier states mill feasibility, included guarding, roll cooling circuit, and exclusions such as foundations. The buyer owns compound recipe, destination, FAT/SAT samples, and plant utilities. Rubber Mixing Mill Sourcing keeps those lists aligned across bidders; we do not sign engineering acceptance.

Replace an existing mill or specify a new compounding bay

Discuss Your Requirements