---
title: Stock Blender – Automated Mixing on the Mixing Mill
description: "Stock blender for mixing mills: automated rubber compounding – fast, homogeneous, and reproducible. Discover how it works and its key benefits with DEGUMA."
---

[Blog](https://info.deguma.com/en/blog)

# [Stock Blender – Automated Mixing on the Mixing Mill](https://info.deguma.com/en/blog/stockblender)

 Written by [Daniela Vögler](https://info.deguma.com/en/blog/author/daniela-vögler) | Mar 12, 2026 3:30:01 AM

# Stock Blender – Automated Mixing on the Mixing Mill

The stock blender is a proven device for mixing mills that automates to a certain extend and standardizes the rubber compounding process. Anyone looking for a reliable solution that delivers consistent, reproducible mixing quality on the mixing mill will find the stock blender indispensable.

## What Is a Stock Blender?

In a mixing mill, the compounding process is typically discontinuous. The quality of the finished compound depends heavily on the operator's experience and attention to detail. To standardize this process and reduce reliance on manual intervention, engineers sought automated solutions early on.

The result: a device now widely known as the "stock blender", a term established in both English-speaking countries and the broader rubber processing industry.

## **Design and Functionality of the Stock Blender**

The stock blender essentially consists of **two rolls** that match the width of the mixing mill rolls but are significantly smaller in diameter. These rolls are arranged vertically and slightly offset above the work roll:

###   **Mixing Cycle with the Stock Blender**

Once a cohesive, stable **rubber sheet** has formed on the work roll after all materials have been added, the automated process begins:

## **Key Advantages of the Stock Blender**

Using a stock blender on a mixing mill offers significant advantages over purely manual compounding:

[View full post](https://info.deguma.com/en/blog/stockblender)

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