When researching oil press machines, you will find many different terms in the industry, such as screw type oil press, hydraulic oil press, cold oil press, hot oil press, and automatic oil press.

At first glance, these terms may seem confusing or even overlapping. However, this does not mean the terminology is incorrect. The reason is that oil press machines are classified from different perspectives, rather than following a single universal standard.

In general, oil press machines can be categorized by machine structure, pressing method, and automation level. Each classification focuses on a different aspect of the oil extraction process.

Overview of Oil Press Machine Classification

Classification	Examples
Structure	Screw oil press, Hydraulic oil press
Pressing process	Cold press oil machine, Hot press oil machine
Automation	Manual, Semi-automatic, Fully automatic

2 Types of Oil Press Machines by Structure

This classification is based on the mechanical design of the oil press and how pressure is applied during extraction, mainly including screw type oil press and hydraulic oil press.

Learn More: Screw Oil Press vs Hydraulic Oil Press: 9 Key Differences

Screw Oil Press Machine

A screw oil press machine extracts oil through continuous mechanical pressure generated by a rotating screw inside the pressing chamber.

As the screw rotates, it pushes oil seeds forward while gradually increasing pressure. Oil is squeezed out through small gaps, while the oil cake is discharged from the end.

Why Is the 6YL Series the Most Popular Screw Oil Press?

The 6YL series has become one of the most widely used screw oil press machines because it offers a good balance of oil yield, processing capacity, durability, and cost-effectiveness. It is suitable for a wide range of oilseeds, including soybean, peanut, sunflower seed, sesame, rapeseed, and more.

Compared with many small oil presses, the 6YL series is designed for continuous operation, making it ideal for commercial oil production. Its simple structure, easy maintenance, and stable performance have made it a popular choice among oil processing businesses worldwide.

Among the different models, the 6YL-68 screw oil press is often selected by small-scale producers and startup oil mills due to its compact size and affordable investment cost. The 6YL-95 screw oil press offers higher capacity and efficiency, making it suitable for growing businesses that require greater production output.

At AgroMachineryTech, we specialize in manufacturing reliable 6YL series screw oil press machines to help customers achieve efficient and profitable edible oil production.

2 Screw Press Structural Types

Screw oil presses can also be divided based on the structure of the pressing chamber:

Round Row Screw Oil Press

• Circular pressing cage design
• Even pressure distribution
• Stable continuous operation
• Widely used in modern commercial machines

Strip Row (Bar-Type) Screw Oil Press

• Composed of strip-shaped pressing bars
• Higher localized pressure
• Strong friction and pressing force
• Common in heavy-duty or traditional models

Key Difference Between Round Row And Strip Row Screw Oil Press

Round row focuses on stability and smooth operation, while strip row focuses on pressure intensity and oil extraction force. Both belong to screw oil press systems.

Hydraulic Oil Press Machine

A hydraulic oil press machine uses high-pressure hydraulic force to slowly compress oilseeds in a sealed chamber.

Unlike screw oil presses, this is a batch process rather than continuous production.

2 Types of Oil Press Machines by Pressing Method

This classification focuses on temperature and processing conditions during oil extraction, mainly divided into cold oil press and hot oil press methods.

Learn More: Cold Press Oil Vs Hot Press Oil

Cold Press Oil Method

Cold pressing refers to oil extraction under low-temperature conditions without excessive heating.

Hot Press Oil Method

Hot pressing involves preheating oilseeds before extraction to improve oil yield.

4 Types of Automatic Screw Oil Press by Functions

This category does NOT define machine structure. It describes how the machine is controlled during operation. 

Automatic oil press machines are not a separate structural type. In most cases, they refer to automated screw oil press machines equipped with control systems and optional integrated functions.

Automatic Temperature Control

Built-in heating system automatically regulates pressing temperature to optimize oil flow and yield.

Automatic Feeding System (Optional)

Some models include automatic feeding to ensure continuous and stable operation.

Integrated Oil Filtration System (Optional)

Advanced models may include built-in filtration to remove impurities immediately after pressing.

Continuous Operation Design

Designed for long-term industrial production with minimal manual supervision.

Relationship Between Different Classification Systems

Oil press machines are not defined by a single classification system.

For example:

• A screw oil press can operate under both cold and hot pressing conditions
• Hydraulic oil presses are generally associated with cold pressing due to low-speed operation
• Automation level applies to both screw and hydraulic systems, but is more common in screw oil presses

How to Choose the Right Oil Press Machine

Production Goal	Recommended Oil Press Machine
Large-scale production	Screw oil press machine
Premium oil production	Hydraulic oil press machine
High-yield industrial production	Hot press system
Health or organic oil market	Cold press system

Conclusion

Oil press machines are classified from multiple perspectives, including structure, pressing method, and automation level.

Understanding these classification systems helps avoid confusion and allows for better equipment selection based on production needs, raw materials, and target markets.

f you are looking for a screw oil press machine, feel free to contact us — we offer factory-direct pricing at nearly two-thirds of the market price, along with customization options and warranty support.