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03 · Edible Oil Processing — Equipment

Screw Oil Press

Continuously presses oilseeds and separates crude oil from press cake. Cold press, hot press and pre-press units.

Rating
Sized to oilseed input (kg/h or tonnes per day)
Versions
Cold press · Hot press · Pre-press units
Best for
Small and medium oil mills, cooperatives and edible oil brands pressing their own oil
  • Continuous pressing with oil and cake discharged separately
  • Cold, hot and pre-press configurations
  • Worm and cage parts selected for the seed you press
  • Can be combined with roasting, filtration and refining

Short answer: A screw oil press squeezes oil out of seeds continuously, separating crude oil from press cake. Its configuration is decided by how the seed enters the press, mainly its moisture and temperature, together with the feed rate you need and the balance you want between oil yield and residual oil in the cake.

How it works

Seed enters through a hopper into the pressing chamber, where a rotating shaft carries a series of worm sections. The space between the worms and the cage gets smaller towards the outlet, so pressure on the seed rises as it moves along. Oil is squeezed out and drains through gaps between the cage bars into a tray, while the solid material leaves at the end as press cake. An adjustable choke at the outlet controls back pressure and cake thickness.

Seed preparation has as much effect as the press itself. Cleaning removes stones and metal that damage the worms; dehulling some seeds reduces fibre; and roasting or conditioning brings moisture and temperature into the range where the cell walls release oil easily. Many presses have a heated chamber for start-up.

Which configuration fits

Form Suits Watch out for
Cold press Premium sesame, flax, walnut, peanut oils More oil left in the cake
Hot press Groundnut, rapeseed, sunflower cooking oil Roasting must be controlled to avoid burnt flavour
Pre-press unit Large plants with solvent extraction Requires downstream extraction plant

What we need from you to quote

  • Seed types and an analysis of oil content and moisture
  • Whether you plan cold, hot or pre-pressing
  • Throughput measured on seed input (tonnes per day) and hours of operation
  • Target oil yield and residual oil in cake, with how they are measured
  • What happens to crude oil: filtering, refining or direct sale
  • Power supply and floor space

Where it sits in a line

Seed is prepared by oilseed cleaning equipment and, for hot pressing, an oilseed roaster. Crude oil goes to an edible oil filter, and can then be refined in an edible oil refining line. For small batches of high-value oils, compare a hydraulic oil press.

Common configurations

  1. Option A

    Cold press

    seed is pressed without roasting; lower yield but natural flavour and colour for premium oils.

  2. Option B

    Hot press

    seed is roasted or conditioned first; higher oil yield and stronger flavour for mainstream cooking oil.

  3. Option C

    Pre-press unit

    removes part of the oil and forms a cake for solvent extraction in larger plants.

What we confirm before quoting

Our engineers check these points with you, so the quotation fits your site rather than a catalogue default.

  1. 01Seed moisture and temperature entering the press
  2. 02Feed rate the press must handle
  3. 03Expected oil yield and how it is measured
  4. 04Target residual oil in the cake
  5. 05Seed type, and whether it is dehulled or pressed with hull

Frequently asked questions

  1. How much oil will I get from my seeds?

    It depends on seed type and oil content, moisture and temperature when entering the press, pre-treatment and the press setting. We state yield as oil out per seed in, and use your seed analysis rather than a general number.

  2. Cold press or hot press?

    Cold press keeps natural flavour and colour, which suits premium oils, but leaves more oil in the cake. Hot press yields more oil and suits mainstream cooking oil, usually followed by filtration and sometimes refining.

  3. Which parts wear and need replacing?

    The press worms (screw sections) and cage bars wear with use, faster with sandy seed or seed with hulls. Good seed cleaning reduces wear; we recommend keeping a spare set.

Get a quote for the Screw Oil Press

Tell us your raw material, finished product and target output. Our engineers reply with a matched configuration and quotation.

What to send with your inquiry

  1. 1Raw material and its condition
  2. 2Finished product and packaging
  3. 3Target output — raw input or finished product
  4. 4Site photos, power supply, utilities

Email sales@hnfoda.com

Send your inquiry

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Buyer guides

  • Edible Oil Processing

    Sesame Oil Production Line

    Oil mills and food companies producing roasted sesame oil, cold-pressed sesame oil or traditional sesame aroma oil.

    Sized to sesame seed input (kg/h or tonnes per day)

  • Edible Oil Processing

    Hydraulic Oil Press

    Small oil workshops and specialty oil producers pressing sesame, walnut, cocoa or other high-value oils.

    Sized to seed or paste charge per batch (kg) and cycles per hour

  • Edible Oil Processing

    Oilseed Cleaning Equipment

    Oil mills and seed processors who need clean seed for pressing, roasting or hulling.

    Sized to raw oilseed input (tonnes per day or kg/h)

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