Screw oil press

Table of Contents

• Definition of screw press oil machine
• Working principle of edible oil press
• Commercial oil press parameter table
• Video of sunflower seed oil press
• Preparation before oil extraction: Common oil materials and differences in oil yield
• Hot Pressing vs. Cold Pressing: What’s Best for Your Business?
• What configuration is required for an oil press production line
• Summary and Recommendation

Working principle of edible oil press

• The extrusion screw is made of high-carbon steel or Cr40 material, which undergoes high-frequency quenching and heat-resistant treatment, resulting in high hardness and strong wear resistance. It can adapt to continuous operation under high temperature and high pressure, and its service life is 8-10 times longer than that of traditional materials.
• The press chamber is designed as a progressive pressurization structure, with the diameter of the press screw root gradually increasing and the screw pitch gradually decreasing. This design promotes the forward movement of the material while inducing flipping and relative motion, generating heat through friction to disrupt the colloidal structure of the oil material and facilitate oil extraction.

Oil press multi-stage pressing and temperature control system

• Using the principle of multi-stage progressive pressurization, the pressure within the press chamber rapidly increases, achieving one-time fission separation of the oil material.
• Equipped with an infrared temperature control system, it automatically controls the pressing temperature (120-160℃) and moisture content, softens and activates oil molecules, thereby improving the oil yield and ensuring the quality of the oil product.

Oil press for both cold and hot use, with vacuum filtration

• Supports both cold pressing and hot pressing modes, adapting to different oil characteristics
• The vacuum filtration system can quickly separate oil residue, ensuring the purity of the oil and meeting hygiene and quarantine standards.

Commercial oil press parameter table

Oil press model	60 type	70 type	80 type	100 type	125 type	150 type
Squeezing chamber diameter	55mm	65mm	80mm	101mm	125mm	150mm
Squeezing screw speed	52r/min	48r/min	47r/min	38r/min	36r/min	35r/min
Squeezing screw speed	2.2kw	3kw	5.5kw	7.5kw	15kw	18.5kw
Processing capacity	30-60kg/h	50-80kg/h	65-130kg/h	140-280kg/h	300-400kg/h	500-600kg/h
Overall weight	220kg	280kg	780kg	1100kg	1280kg	1420kg

Customize equipment output according to customer requirements

Video of sunflower seed oil press

Preparation before oil extraction: Common oil materials and differences in oil yield

The multi-functional oil press, due to its high efficiency and versatility, is capable of pressing a wide range of oil-bearing crops and seeds, covering the agricultural, food processing, and industrial sectors.

• Soybeans: The oil yield is approximately 12%-18%. After pressing, the soybean cake can be used as feed or protein raw material.
• Rapeseed (canola seed): With an oil yield of 30%-45%, it is the primary source of canola oil.
• Peanut: With an oil yield of 40%-50%, peanut oil boasts a rich aroma and high market value.
• Cottonseed: With an oil yield of 10%-20%, it needs to be detoxified before being pressed. Cottonseed oil can be used for industrial or edible purposes.
• Sunflower seeds (oil sunflower): The oil yield is 25%-40%. Sunflower oil is rich in unsaturated fatty acids.
• Sesame: The oil yield is 45%-55%. Sesame oil (aroma oil) has a unique flavor and is suitable for cold pressing.
• Flaxseed: With an oil yield of 30%-40%, flaxseed oil is rich in alpha-linolenic acid and is suitable for healthy edible oil.
• Perilla seed (Perilla frutescens seed): The oil yield is 35%-45%. Perilla seed oil has medicinal value.
• Safflower seeds: The oil yield is 20%-30%. Safflower oil is rich in vitamin E.
• Oil tea seed: The oil yield is 20%-30%. Camellia oil is a high-end edible oil that is resistant to storage.
• Walnut kernel: With an oil yield of 60%-70%, walnut oil is nutrient-rich and suitable for infants and young children.
• Almond: The oil yield is 40%-50%. Almond oil can be used in food or cosmetics.
• Coconut meat: With an oil yield of 60%-70%, coconut oil is heat-resistant and suitable for cooking or industrial purposes.
• Olive fruit: The oil yield is 15%-25%. Olive oil is the core oil in the Mediterranean diet.
• Palm fruit: With an oil yield of 20%-30%, palm oil is the vegetable oil with the highest global production.

Hot Pressing vs. Cold Pressing: What’s Best for Your Business?

• The choice between hot pressing and cold pressing is a business decision that affects your oil yield and product quality. Your screw oil press machine can handle both methods. The difference happens in the pre-treatment stage, before the seeds even enter the press. As a factory-direct manufacturer, we can configure a full production line that is perfectly suited for the type of oil you want to produce.
• Hot Pressing: For Maximum Yield
• Hot pressing is the most common commercial method. It means you heat the oilseeds in a roasting machine before you press them. Heating the seeds to around 120°C does two important things. It lowers the moisture content and it cooks the proteins inside the seed. This fully breaks down the cell walls, making it much easier for the oil to escape.
• For your business: This method gives you the highest possible oil yield. You get more oil from the same amount of seeds, which means more profit. The resulting oil also has a strong, roasted aroma that is very popular for general cooking oils.
• Cold Pressing: For Premium Quality
• Cold pressing means you press the raw seeds without any pre-heating. The temperature during extraction is kept low, usually below 60°C, generated only by the friction inside the press. This gentle process is designed to protect the natural qualities of the oil.
• Cold pressing means you press the raw seeds without any pre-heating. The temperature during extraction is kept low, usually below 60°C, generated only by the friction inside the press. This gentle process is designed to protect the natural qualities of the oil.

What configuration is required for an oil press production line

A complete oil extraction equipment typically includes three core devices: the oil press main unit, the frying pan, and the oil filter. Depending on requirements, auxiliary equipment such as feeders, shellers, pressing machines, oil storage tanks, and filling machines can be added to achieve full-process automation from raw material pretreatment to finished oil filling.

• Oil press: It is the core equipment in the oil pressing process, which squeezes out the oil from the oil material through mechanical pressure.
• Roasting machine: It roasts oilseeds to destroy their cell structure, increase oil yield, and improve oil flavor
• Oil filter: Filters the crude oil extracted, removes phospholipids, impurities, etc., and improves the transparency and stability of the oil product.
• Auxiliary equipment: feeder, sheller, oil storage tank.

Summary and Recommendation

A screw oil press machine is a powerful and essential tool for any oil production business. It offers a reliable and efficient way to extract oil from a huge variety of seeds. Your choice between hot and cold pressing will define your product and your market. Most importantly, selecting a model with the right capacity for your business scale is key to your success. Partnering with a manufacturer who can provide a complete solution, from pre-treatment to filtration, will make your journey into oil production much smoother.