Skip Costly Repairs & Keep Production Flowing: Essential Upkeep Tips for Your Soybean Oil Press Machine

Your soybean oil press machine is the backbone of your oil production—keeping it running smoothly isn't just a task, it's a way to avoid costly downtime and keep oil quality consistent. With simple, regular upkeep, you can extend its lifespan and cut down on repairs. Here's Henan Glory's go-to maintenance playbook:

1. Non-Negotiable Daily Cleanup

After every shift, tear down the press chamber to clear leftover soybean cake. Hardened cake buildup clogs the chamber, strains the motor, and risks bacterial contamination in future batches. Wipe the machine's exterior too—oil and dust buildup turns into a tough, grimy layer that's a hassle to remove later. If the press sits idle for over an hour, pull out the screw shaft to clear hidden cake scraps (this prevents jams when restarting).

2. Lubrication: Keep Parts Moving Smoothly

Key moving components depend on proper lubrication to avoid wear:

Screw shaft: Lubricate it at the start of every shift to prevent dry grinding damage.
Gearbox: Check the oil level every 50 operating hours; replace the oil (and inspect its quality) once a year.
Bearings & bushings: Lubricate them regularly, and clear clogged oil holes right away. Neglecting this leads to overheated bearings or seized parts—costly to fix and disruptive to production.

Structure of oil press machine

3. Read the Signs: Spot Issues Early

Your press machine gives clear warnings when something's off—learn to "listen and look":

Unusual noise: Shut down immediately (this could mean a metal fragment/stone in the chamber, or a loose fastener).
Cloudy oil: Likely from overly dry soybeans or low machine temperature (aim for 60-70℃—the exterior should feel warm to the touch).
Low pressing capacity/excess slag leakage: Check for worn screw shafts, misaligned press bars, or too much chamber pressure.

Address these small issues fast (e.g., replace worn parts) to keep oil quality high and avoid bigger breakdowns.

4. Proper Shutdown: Don't Just Flip the Switch

Shutting down correctly prevents buildup and damage:

1-2 minutes before powering off, close the feed plate to stop adding soybeans.
Reverse the screw shaft 2-3 times to widen the cake outlet gap—let all leftover slag/cake fully discharge.

Only then turn off the power switch.

5. Long-Term Storage: Prevent Rust & Damage

If the press will be idle for a while:

Disassemble key parts (screw shaft, press bars, cake outlet ring) and clean them thoroughly.
Coat parts with a thin layer of oil to prevent rust.
Store everything in a clean, dry area—so your press is clog-free and ready to run when production resumes.

Three types of oil press machine

Consistent maintenance is the secret to your soybean oil press machine's long-term efficiency. At Henan Glory, we don't just supply reliable cooking oil processing equipment—we partner with you to keep your production line on track. Our technical support and spare parts services are here to help you avoid downtime and keep producing top-quality oil.


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A Comprehensive Guide to Cooking Oil Production Methods

 Edible oil serves as a fundamental ingredient in culinary practices worldwide. Incorporating appropriate amounts of cooking oil not only enhances the nutritional value of meals but also significantly improves the flavor and texture of various dishes. This article explores the primary industrial methods for producing cooking oils, focusing on two predominant techniques: mechanical pressing and solvent extraction.

Mechanical Pressing: Traditional Efficiency
The pressing method represents the optimal choice for oil-bearing crops with high lipid content, including peanuts, sunflower seeds, and soybeans. This conventional approach follows a systematic production sequence comprising:
1. Raw material cleaning and preparation
2. Controlled heating/cooking
3. Mechanical oil extraction
4. Oil clarification/filtration

Cooking oil pressing machine

Modern pressing operations achieve remarkable efficiency, with residual oil content in the processed cake typically reduced to below 8%. The resulting oil generally requires minimal additional processing before being suitable for direct consumption or commercial distribution.

For entrepreneurs considering small to medium-scale operations:
1. Compact integrated press-filter units represent ideal solutions for workshop-scale production
2. Larger facilities processing over 10 tons per day benefit from complete production lines incorporating all essential processing stages

Solvent Extraction: Maximum Yield Solution
The solvent extraction method demonstrates particular effectiveness for materials containing approximately 20% oil content, such as rice bran and specific soybean varieties. For high-oil commodities, manufacturers often implement a preliminary pressing stage to reduce oil content to approximately 15% before proceeding with solvent extraction.

This sophisticated process involves:
1. Comprehensive raw material pretreatment (cleaning, cooking, flaking, expanding)
2. Hydrocarbon-based oil dissolution and recovery
3. Thorough desolventizing of both oil and meal

Cooking oil solvent extraction machine

The remarkable efficiency of solvent extraction reduces residual oil in the final meal to under 1%, creating valuable animal feed byproducts. However, crude oil obtained through this method must undergo complete refining before achieving edible quality. This approach becomes economically viable for operations handling 30 tons or more of materials daily.

Conclusion: Selecting the Appropriate Method
Both mechanical pressing and solvent extraction offer distinct advantages for different production scenarios and scales. The optimal choice depends on multiple factors including raw material characteristics, production volume requirements, and investment capacity.

As a professional provider of oil processing solutions, Henan Company offers comprehensive technologies and equipment for both production methodologies. Our engineering team stands ready to assist you in developing the most efficient and profitable oil production system tailored to your specific requirements.


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How palm oil processing differs from the pressing of general oilseeds

Palm fruit and general oilseed like peanut, sunflower, soybean, cottonseed are different oil seeds, and need different pressing processes and machines. In the pressing process of palm oil and common oil, it generally requires several steps of pretreatment, pressing, clarification and drying. Below we will compare in detail the difference between palm oil making and general oilseed press.

1. Raw material differences

Palm oil is extracted from the fruit of the oil palm tree (Elaeis guineensis). The raw material is the fresh fruit bunch (FFB), which contains a mix of both mesocarp (the fleshy part of the fruit) and kernel (the hard inner seed). The mesocarp, which makes up the majority of the fruit, is rich in oil and is the primary source for palm oil extraction. The kernel, though also containing oil, is usually processed separately to extract palm kernel oil (PKO).

In contrast, general oilseeds like soybeans, sunflower, and canola are primarily seeds or grains that are processed to extract their oil. These seeds are typically smaller, with a higher proportion of oil in the seed compared to the fruit of the oil palm. For example, soybeans consist of around 18-20% oil content, while sunflower seeds can have around 40% oil content, depending on the variety.
 

2. Extraction process differences

The extraction of palm oil involves a multi-step process, starting with the harvesting of the fresh fruit bunches. After harvesting, the fruit undergoes sterilization (usually with steam) to loosen the fruit from the bunch and to deactivate enzymes that could degrade the oil quality. The next steps include:

Threshing: Separation of individual fruits from the bunches.

Sterilization: Heat treatment to soften the fruit and facilitate oil extraction.

Pressing/Extracting: The softened fruits are mechanically pressed or subjected to a chemical solvent extraction process to extract the oil. After pressing, crude palm oil (CPO) is obtained, and it undergoes further purification.

Additionally, the palm kernel is separated and undergoes its own pressing process to extract palm kernel oil (PKO), which is a distinct product with different properties and uses.

                                                 Palm oil extraction machine

For general oilseeds, the extraction process typically involves cleaning, conditioning, and then pressing the seeds using either mechanical or hydraulic presses. In many cases, the oil content of oilseeds is high enough to be efficiently extracted using a mechanical press. The process usually involves

Cleaning: Removing impurities like dirt, stones, and other foreign particles from the seeds.

Conditioning: Heating and conditioning the seeds to optimize the oil extraction.

Pressing: Extracting the oil through a screw press or hydraulic press.

If necessary, solvent extraction methods (like hexane) can also be used to extract additional oil from the pressed cake. This method is commonly employed for seeds with lower oil content, such as soybeans.

                                         Oil pretreatment and pressing machine

3. Equipment and machinery design

The equipment used for palm oil extraction and general oilseeds extraction differs significantly in terms of design, due to the different physical properties of the raw materials. Palm oil extraction typically requires larger and more robust equipment capable of handling the high moisture content and larger size of the fresh fruit bunches.

Palm oil press: We offer a range of equipment specifically designed for palm oil extraction, including fresh fruit bunch thresher, sterilizers, digesters, screw presses, and palm oil clarifiers. These machines are built to handle the special requirements of palm fruit, such as the need for sterilization and efficient separation of the fruit and kernel.

Oilseed press: For general oilseeds, the equipment used are typically smaller and more straightforward. These include seed cleaners, oilseed conditioners, oil presses, and sometimes solvent extractors. Our screw press and hydraulic press machines are designed for different types of oilseeds, ensuring the best oil yield and minimal loss.

4. Oil yield and quality

Palm oil extraction typically yields a higher quantity of oil compared to many other oilseeds. The oil yield can be as high as 20-25% of the fruit’s total weight. Furthermore, palm oil contains a unique composition of fatty acids that gives it desirable cooking properties, including high oxidative stability and resistance to rancidity.

While the oil content of general oilseeds varies, the oil yield is typically lower compared to palm oil. However, oilseeds such as sunflower, rapeseed, and soybean produce oils that are preferred for specific applications due to their nutritional profiles, such as lower saturated fat content or higher unsaturated fat content.

5. Market applications

Palm oil is highly versatile and used across various industries. In addition to its common use in cooking and food products, it plays a significant role in the production of biodiesel, cosmetics, and personal care products. Its low cost and high yield make it an attractive option for large-scale commercial use.

General oilseeds are primarily used in food production (such as cooking oils and margarine), animal feed, and industrial applications. The oils extracted from seeds like sunflower, soybean, and canola are often seen as healthier alternatives, particularly due to their polyunsaturated fat content.

Henan Glory understands difference between palm oil making and general oilseed press. Our advanced, high-efficiency extraction equipment is designed to meet the specific needs of both oil making. Whether you are involved in large-scale palm oil production or processing other oilseeds, our range of equipment guarantees excellent oil yields, high product quality, and operational efficiency.

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Entire Sunflower Oil Processing Plant Solutions

 When you’re planning to launch a sunflower oil processing plant, do you often get stuck with these worries? If you source pretreatment, extraction, and refining equipment from different suppliers, will mismatched components cause production bottlenecks? Will inconsistent standards across processes compromise the oil’s quality and food safety? Or will fragmented technical support leave you stranded when the line hits issues after startup?

Henan Glory provides you with an entire turnkey sunflower oil processing plant to address your concerns.

1. Seed Preparation and Pretreatment
This initial stage is crucial for ensuring high oil yield and quality, and it also helps protect downstream equipment.

Cleaning: Raw sunflower seeds contain impurities such as stems, leaves, sand, stones, and metal fragments. Cleaning equipment (including vibrating screen, magnetic separator, and destoner) removes these impurities to prevent equipment damage and ensure the purity of sunflower oil.

Dehulling (Cracking and Separation): Sunflower seed shells are high in fiber and wax but low in oil content. Dehulling is necessary to remove them. Seeds are first cracked using cracker. Kernel husk separator then efficiently separate the kernels from the shells. This step increases the protein content of the subsequent meal by-product.

Flaking and Conditioning: The sunflower seed kernels are rolled into thin flakes by flaking machines. These flakes are then conveyed to multi-layered cooker for conditioning. Conditioning is critical as it adjusts moisture content and temperature, coagulates proteins, and breaks down oil cells, significantly optimizing the efficiency of the subsequent oil extraction step.

2. Oil Extraction
This is the core process of separating oil from the sunflower seed flakes. Two primary methods are used, often in combination.

Mechanical Pressing: The conditioned flakes are fed into a screw oil expeller. Inside the press chamber, a rotating screw shaft continuously advances the material, creating increasing pressure that squeezes out the oil. This is a physical process, which better preserves the oil's natural flavor and nutrients.

Solvent Extraction (Optional): The cake from the screw oil expeller retains some residual oil. TIn order to achieve the highest possible oil yield (over 99%), you can send this cake to a solvent extraction plant. Here, a food-grade solvent (typically hexane) dissolves the remaining oil. The solvent is then recovered from both the oil and the meal through distillation and is reused. The end products are crude sunflower oil and defatted meal.

3. Sunflower Oil Refining
Crude sunflower oil contains gums, free fatty acids (FFA), pigments, odoriferous compounds, and waxes. Refining equipment removes these impurities to produce a clear, stable oil with a mild flavor and improved shelf life.

Degumming: This first step, often carried out using water or acid, removes hydratable and non-hydratable phosphatides (gums) to prevent the sunflower oil from becoming hazy.

Deacidification: An alkali solution (e.g., NaOH solution) is added to react with FFA, forming soapstock. This soapstock is then separated via centrifugation.

Bleaching: In a bleaching tank, adsorbents like activated white clay are mixed with the sunflower oil to remove pigments, residual soaps, and oxidation products, improving the oil's color.

Deodorization: This is a key step conducted under high temperature and vacuum. Steam is passed through the oil to strip away volatile odor and flavor compounds, resulting in a neutral-smelling and tasting oil.

Dewaxing: Specific to sunflower oil, this optional step removes waxes to prevent cloudiness at cooler temperatures. The oil is slowly cooled in crystallizer to allow wax crystals to form, which are then removed by filter.

4. Sunflower Oil Packaging and Storage
The final refined sunflower oil is stored in large tanks, often under a nitrogen blanket to prevent oxidation. The oil is then automatically pumped to filling machines to be packaged into bottles, plastic jugs, flexitanks, or drums. The packaging line typically includes capping, labeling, and case-packing machines, and is followed by palletizing for shipment.

If you are preparing to launch or expand your sunflower oil processing plant, contact us and let Henan Glory's turnkey solutions help you turn plans into results faster.

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How is cottonseed oil made in cooking oil processing factory?

Cottonseed is a by-product of cotton manufacturing process, which can be used to make cooking oil. Its oil content is about 35%. In cooking oil processing factory, there are two kinds of technology which can be used to making cottonseed oil: pressing technology and solvent extraction technology. Here, Doing Company will introduce them for you one by one.

1. How is cottonseed oil made using pressing technology?

Firstly, the cottonseed need delinting treatment. The requirement of the cotton linter content is less than 3%. If your cottonseeds meet the requirement, this process can be skipped.

Secondly, the cottonseeds need to be cleaned by wind separator to remove the impurities.

Thirdly, clean cottonseeds will be cracked by crushing machine, whose purpose is to remove the cottonseeds shell. So after crushing,  the cotton seed kernel and shell separating machine and round play screen are used to separate the cottonseed and shell. Then, you can get clean cottonseed kernels.

 

Fourthly, the cottonseed kernels will be processed by flaking machine. The cottonseed kernels will become flakiness, which will make the oil yield rate increase.

 

Fifthly, flaky cottonseed kernels will be sent into cooking machine to adjust the temperature and moisture, and reach the best condition for pressing.

At last, cooked flaky cottonseed kernels will be put into oil press machine. The cottonseed oil will flow out continuously. This oil is crude cottonseed oil, which should be filtered by leaf filter firstly, and then be sent into edible oil refinery plant to be refined into product oil.

2. How is cottonseed oil made using solvent extraction technology?

Using solvent extraction technology to make cottonseed oil also need pretreat the cottonseeds with some machines. The cleaning, shelling equipment is same as those used in pressing line. In order to improve the effect of solvent extraction, it also can add softening machine and puffing machine to process the cottonseed kernels. 

As for the oil press machine, if using solvent extraction technology, it should be replaced by oil pre-pressing machine, whose residual oil rate is about 15%. Then the cottonseed cakes will be sent to cottonseed oil solvent extraction plant to extract oil out.

Cottonseed oil solvent extraction plant is to use n-hexan to extract the oil from cottonseed cakes, and the final residual oil rate can be less than 1%. The oil you get is also crude cottonseed oil, which must be sent into edible oil refinery plant to be refined into product oil.

The above is the introduction of crude cottonseed oil processing technology in cooking oil processing factory. If you also want to know the crude cottonseed oil refining technology, you can see another article--Cottonseed oil refining process introduction

If you want to make crude cottonseed oil by pressing or solvent extraction technology, or want to refine the crude cottonseed oil into product oil, you can contact us directly.

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