Oil Press Machine Manufacturers
Connect with verified oil press machine manufacturers on Towobo. Source screw oil presses, cold press machines, oil expellers, and commercial oil extraction equipment for sunflower, groundnut, soybean, sesame, coconut, rapeseed, and other oilseeds.
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Browse Oil Press Machine Suppliers →How oil press machines work
A screw oil press (also called an expeller or oil expeller) uses a continuously rotating helical screw inside a tapered barrel cage to compress oilseeds progressively, squeezing oil out through the cage openings while expelling the residual oil cake from the end of the screw. The process is continuous and mechanical, requiring no solvents. The key variables are: barrel cage opening size (which affects oil clarity and cake oil content), screw compression ratio, barrel temperature (controlled by heating jackets or residual frictional heat in hot pressing), seed moisture content, and seed feeding rate. Cold press machines operate at lower temperatures — typically achieved by water cooling the barrel — to avoid heat-induced changes to the oil. Hot press machines condition seeds with heat before pressing, improving oil yield at the cost of some heat-related changes to oil colour and flavour.
Buyer guidance for oil press machines
Before requesting a quotation, specify: (1) oilseed type and variety (sunflower, groundnut, soybean, sesame, rapeseed, coconut, palm kernel, corn germ, or other); (2) seed condition — moisture content and whether seeds require cleaning or dehulling before pressing (do not claim oil yield without validated trial data); (3) required processing capacity in tonnes of seed per day or kg/hour; (4) cold or hot pressing; (5) whether post-press filtration is required (a plate-and-frame filter press or filter-centrifuge to clarify crude pressed oil); (6) whether refining stages are required downstream; (7) oil cake handling — will it be used for animal feed, protein extraction, or disposal; (8) available utilities (electrical supply, water for cooling, compressed air); (9) available floor area; (10) CE marking or other market certification requirements. Cleaning and dehulling of seeds before pressing substantially improves oil quality and reduces cage wear — ask suppliers whether seed preparation equipment is included in their scope.
Frequently asked questions
Can a single oil press machine handle multiple oilseed types?
Many screw oil presses can process different oilseed types by adjusting the cage opening, screw speed, and seed conditioning parameters. However, the optimal settings differ significantly between species — a machine optimised for sesame seed will not be optimally configured for sunflower. If you intend to process multiple oilseeds, ask the supplier to confirm which species their machine has been validated for and what configuration changes are required for each species. For highest oil yield, seed-specific screw profiles and conditioning equipment are preferred.
What is the residual oil content in the oil cake after pressing?
Residual oil content in the press cake depends on the oilseed type, the press configuration, and the seed moisture and temperature during pressing. Typical residual oil in the cake from a well-optimised screw press is 6–12% on a dry basis for most oilseeds. Solvent extraction of the press cake can reduce residual oil to below 1%, which is why large-scale processors often combine pre-pressing with solvent extraction. Suppliers should provide residual cake oil data from validated trials with the specific seed type you intend to process — do not accept generic yield figures.
Do I need to filter the crude oil after pressing?
Crude pressed oil contains fine seed particles, phospholipids, waxes, and moisture that cause turbidity and reduce shelf life. Filtration through a plate-and-frame filter press or centrifuge to remove suspended solids is standard practice before storage or sale, even for unrefined pressed oils. For oils sold as virgin or unrefined, filtration does not constitute refining — it simply removes physical impurities. Full degumming, neutralisation, bleaching, and deodorisation are required for RBD refined cooking oil.
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