Why the Pressed Oil is Dark with Foam When Cooking

For the cooking oil manufacturers, the pressed oil with gold and bright color is our processing goals. But the common oil press machine, especially the old type oil press, would only produce the dark oil. What make this happen?

First, one of reasons is that the cooking oil is not pure enough and the impurity is not filtered thoroughly. 
The old type oil press is without fine filter system, they all filter the oil using the labor force. Of course, the raw material can' be pressed completely.
In addition, some new oil press machine has adopted air-pressure filtration, or called concept filtration, also can't filter oil thoroughly. In the first condition, its principle is that putting oil into a sealed container whose bottom is equipped with filter cloth and screen. And the oil outlet is below the filter cloth and filter screen. We need to Increase the pressure of the container, press the oil through the filter cloth and filter screen to achieve the purpose of filtering oil. The advantage of this method is fast speed of filtering oil. Yet the disadvantage is the excessive fast speed, and the large pressure would lead to impurity. 
In the second condition, the operation is complicated, after filtration, the operator needs to open the container to clean the oil residue. But cleaning is inconvenient and can not work continuously. This method uses two filter ways, one is adopting high air pressure filtration, and the standard of pressure resistance and air tightness of high pressure container is very strict. Otherwise, it is easy to lead to excessive pressure which would cause container burst and other potential safety hazard. So, when you purchase this kind of equipment, pay attention to check whether the machine manufacture has production qualification of high pressure container and qualified high pressure container.

The other has adopted vacuum filtration. Its principle is to take the air inside container away. And the filter cloth and filter screen is equipped on the top of container. When the oil flows through the filter cloth and filter screen, the oil would be sucked into container by vacuum. And the oil residue is left on the filter cloth and filter screen. When the oil filtration is finished, the pressure would be reduced automatically inside of the container to avoid potential safety hazard problems. Thus the oil was filtered thoroughly, and it is convenient to clean the oil meal.

Our oil press machine has adopted vacuum filtration method.

We have done a detailed market survey and research of combine peanut, sunflower seeds, flax seeds oil, and rapeseeds oil,  and find that two other factors has lead to the  deep color and dark of the oil.

Secondly, there are hot press and cold press about  oil press methods. The pretreament is done before the hot press. In this method, the material is roasted until mature or medium mature, thus to improve the oil flowability in the crops and to increase the activity of the oil molecules. But at the same time, the fire temperature can't be completely controlled which would lead to the surface carbonization of the oil seeds. The oil crops carbonization would enter the press chamber through spin squeezing in the condition of high pressure. Carbide particles and tiny flakes mixed in oil will flow out from outlet. So the crude oil looks black which would affect the oil color and taste seriously.

The last but not least, crop linoleic acid and melanin, such as flax seeds and rapeseed, the pressed oil color is still dark, even using the cold press method. To solve this problem, you must use oil refining technology bleaching to achieve the very significant results.

How to Start a Press Oil Workshop?

f you have an  individual oil press workshop or you want to start a small plant, we will give you some advice for your reference.
We have provided three kinds of oil press for you: automatic screw oil press, screw oil press and hydraulic oil press. They all have their own characteristics and application scopes which is up to your capacity and raw materials.
About the raw materials:The hydraulic oil press is specially suitable for users of sesame, peanut, rapeseed to use. 
Almost all oil crops can be pressed by screw oil press, including peanut, soybean, oil flower seeds, rapeseed  walnut, cotton seeds, etc. 
Automatic screw oil press has a wide raw material application scopes, almost covering all of the oil crops. 
The main differences between screw oil press and automatic screw oil press are capacity and the degree of automation which I will introduce you below.

About the application scopes:The hydraulic oil press is mainly used for home use or relatively small workshop, because the capacity is relatively small. But our hydraulic oil press also has other advantages, I also will tell you that below.
The screw oil press and automatic screw oil press are all suitable for commercial use which will help your business because of their large capacity.

About the capacity of three kinds of oil press: The capacity of hydraulic oil press may be 7-8 kg/5- 7 minutes ; while the screw oil press and the automatic screw oil press may be from 1 to 18 T/D. In addition, the oil press machine can be customized depending on your requirements. 

At last but not least, tell you some more information about the outstanding advantages and disadvantages of these three kinds of oil press: 
1. The hydraulic oil press is lightweight and convenient so it  is conducive to the operate.
2. The capacity of screw oil press and automatic screw oil press is larger than hydraulic oil press, the occupancy area is larger than hydraulic oil press, and the working efficiency is higher than hydraulic.
3. The three kinds of oil press all can be used for 10-20㎡ workshop. For their detail information, please refer to our products.

Last but not least, tell you some more information about the outstanding advantages and disadvantages of these three kinds of oil press.The automatic screw oil press is better than the general oil press: Automatic screw oil press is also called fully automatic screw oil press, it needs no other manual work except the feeding one. It is also equipped with automatic temperature control system, vacuum filtration, simple operation, little occupancy area (less than 20 ㎡) as well as high oil output which will Improve the oil yield through automatic temperature control system. Automatic screw oil press has the features of state-of-the-art design, reliable performance, simple operation, easy maintenance, energy-saving, high oil output, labor-saving, wide application and small occupancy area, etc.

New Aspects to Buy Agricultural Oil Press Machine

There is no wonder that every customer wants to purchase oil press machine of the best quality as well as lowest price. What’s more, comprehensive and thoughtful services of the oil press suppliers can't be neglected at the same time. Then, what the hell are the problems that we should pay attention to ? Here are a few tips for your reference.
Certifications
Production certification. Authentic products are always awarded with the inspection certification, product specification and installation notes from the national quality and technical supervision departments and agricultural product quality inspection station after inspection and quarantine. We have CE certificate conforming to the European Community standards.
Specifications and models. Observe whether the specification meets the requirements when purchasing accessories. Some accessories look all the same in the appearance but aren't suitable for your machine.
Trademarks. When purchasing  oil press accessories, you must have the awareness of trademarks and select the regular brand products. Weigh with your hands firstly before placing an order. Most of the counterfeit parts use inferior materials and turn out substandard goods with light weight and small size.
Assembly mark. Authentic qualified product always have clear and obvious assembly marks, ie. timing gear assembly mark must be clear. The accessories without marks or with unclear marks are absolutely not the good options.
Packaging
▶ Authentic products have a high standards about package. Products are always treated to be rust-proof, water-proof, anti-corrosion, and wooden packaging is always the better choice.
▶ Also there are always product name, specifications, models and the quantity etc. in the obvious position. While the fake and shoddy products are always with rough poor packaging.
Appearance
▶ Corrosion, oxidation, discoloration, deformation, aging phenomenon would emerge in the accessories because of the improper storage. Don’t buy accessories of the conditions above.
▶ Distortion. The accessories, pressing worms etc. would be easily distorted due to the inappropriate storage method. It won't work properly if the geometry size can't be up to the requirements.
▶ Cracks. Shoddy products look dark in the appearance, and there are obvious defects like cracks, sand holes, slag, and burr etc., which would easily lead to malfunction such as leakage of oil, water and air.
▶ Loose & catching. Qualified products: assembly parts would rotate flexibly, and the gap size is up to the standard specification. Shoddy products: too loose or can’t rotate flexibly.
▶ Surface color. The surface shading of the original products is always relatively fixed into specified color. Generally experienced people can tell true and false from the appearance easily.
As a professional oil press machine manufacturer, Amisy would provide you with various trustworthy products and customized services. Look forward to cooperating with you!

Running-in Method for Newly-purchased Oil Press Machine

We all know that the newly-purchased oil press needs time to run-in during the early period. Old-fashioned machine needs a long time to adapt, So many manufacturers have launched the oil press machine which can be used to extract edible oil directly without running in. However, what you don't know is that the running-in of oil press machine is definitely different from the process of oil extraction. And simple machine test can do a lot to quickly put the machine into use.

Step 1: Before using the oil expellers, prepare assistive devices and container tape, check and adjust the tightness. And then start the motor for 15 minutes without feeding, check the rotate speed of screw shaft. The general speed should be about 33 min. Pay attention to the voice between gears, the bearing parts and motor. Also the motor current should be under control when idling. In addition, stop the machine immediately if the current is too strong, and then restart after adjustment.
Step 2: Master the billet temperature according to different oil plants. Feed the oil plants and water into the pressing plate. Press the tiniest position especially, relax stem nut, unplug the active pin, and the rotating bar is just on the side. Turn the rotating bar back to the starting position and tighten the piston at the same time. Press gently to deal with stress from the regular extrusion, too much force would lead to accident. For the oil plants of high oil content, press with the low-pressure pump for the first time, and replace with high-pressure pump for the second. If the pressure gauge point can't return back to zero, it's necessary to test, repair and replace. Open the return valve, the oil would flow back into the tank automatically, and then it's OK to remove the extrusion plate.
Step 3: After the above test, prepare about 50 kg (such as soybean, rapeseed) raw material for the hopper. Note: feed slowly at the beginning, or else the pressure in the chamber would increase, which would lead to serious accidents. Thus at the beginning of pressing, feed slowly and evenly, and repeat the above process for more than 3 ~ 4 hours, the temperature of the screw oil press would increase, or even smoke(this is normal ). At first, the temperature of the chamber might be low, twist and adjust the handle on the stud to increase the thickness of the cake and improve the moisture of the oil plants at the same time. When the chamber temperature rises to about 90° C, or say the oil press could operate normally, adjust the cake thickness to about 1.5 ~ 2.5 mm, and tighten the fixed nut.
Step 4: After normal operation, the raw material of high oil content are mostly concentrated in the bar came and the front exhausting. 60% of the oil comes from the bar came, and 30% from the front exhausting. While the discharged oil from the end is clear with little quantity. During this period, blend oil cakes of much oil into the raw material for twice pressing. Also, feed in a uniform and steady way, otherwise it will affect oil yield and the life of the hydraulic oil press.
Step 5: During the operation, check the condition regularly and control the oil plant moisture. Normally the oil cake is flaky, it feels smooth on one side while there are many pores on the other. If the cakes are loose or shapeless which could be pinched into pieces by hand, that shows the low moisture of the raw material. If the cakes are feeble, and most of them are flaky, that indicates high moisture.Under normal conditions, there is little or no residue from round rings. In addition, the oil outlet position would move according to the moisture of raw material.

SWOT Analysis of Hydraulic Oil Press

Nowadays, a new kind of hydraulic press machine is popular with customers in the market, which has completely changed the traditional oil press method. Next, we would carry out a SWOT analysis of the hydraulic press industry so as to offer some information for your reference.

Strengths
NO.1: High Efficiency. It has the ability to press various oil plants, 6 to 8 minutes is enough from the entrance of oil plants to the end of the processing. So the consumers are able to see all the procession. That is, the efficiency improves a lot.
NO.2:Simple Structure and Multi-usage. The machine can be used to press 30 kinds of oil crops such as peanuts, flax, sesame, rapeseed, sunflower, cottonseed, soybean etc. Also, the rest oil cake after pressed is of good quality. The nutrition won’t loss in the secondary processing
NO.3: Low Energy Consumption. The hydraulic press machine is energy-saving. There is no need for a lot of space and human resources. And the operation is easier and faster.
Weakness
NO.1: Limited Scope of Application. The hydraulic press machine has lower oil yield compared with the screw oil press, as is in the same case with production. What’s more, the machine is only suitable for household production. The limited scope of application accounts for the reason of Small-scale production.
NO.2: The hydraulic press machine must be operated by special person, also there must be person when the mainframe is in the process of boosting. So you must have the operator who has the relevant expertise.
Opportunity
NO.1: Large Scope of Market. It can boot to oil regardless of weather conditions and differences. So the machine can be used in various regions, this expands the scope of the market.
NO.2:Market Potential. The hydraulic oil press is suitable for processing scattered oil, which meets the needs of urban individual processing households. In addition, the pressed oil is edible without filtration, which ensures it very suitable for the individual processing households and home sales, so the market potential is huge.
NO.3: Wide Range of Engine Power Choice. The machine can be driven by three-phase electric power as well as household power, that is industrial and civil voltage from 200 to 380. So that it can be promoted and sold in most areas of the world.
Threat
The screw press has already occupied certain market share, as with the newly emerging press. The hydraulic oil press is still under threat though there is some certain market.

Amisy specializes in the production and sale of various oil presses, and we are here to provide you with the products and services needed at any time. Welcome to make choice of purchase.

Palm Kernel Oil Extraction

Nowadays, there are about 20 countries in the world producing palm oil. And the main producing countries are Malaysia, Indonesia, and Nigeria. The output of these three countries accounts for 88% of the world's total palm oil production. And since 2004, the total amount of palm oil and palm kernel oil has been more than soybean oil, the world's major edible oil. for the first time. While there exists great difference between palm oil and palm kernel oil. Here we would talk about the palm kernel oil extraction

Mechanical extraction
Mechanical extraction processes are suitable for both small and large capacity operations. The three basic steps in these processes are (a) kernel pre-treatment, (b) screw-pressing, and (c) oil clarification.

Diagram 2: Mechanical extraction of palm kernel oil.
Line (A) is for direct screw-pressing without kernel pre-treatment;
Line (B) is for partial kernel pre-treatment followed by screw-pressing;
Line C is for complete pre-treatment followed by screw-pressing.
Kernel pre-treatment
Proper kernel pre-treatment is necessary to efficiently extract the oil from the kernels. The feed kernels must firstly be cleaned of foreign materials that may cause damage to the screw  oil press, Magnetic separators commonly are installed to remove metal debris, while vibrating screens are used to sieve sand, stones or other undesirable materials.

A swinging hammer grinder, breaker rolls or a combination of both then break the kernels into small fragments. This process increases the surface area of the kernels, thus facilitating flaking. The kernel fragments subsequently are subjected to flaking in a roller mill, revolving at 200-300 rpm. The thickness of kernel cakes is progressively reduced as it travels from the top roller to the bottom. The flakes that leave the bottom nip are from 0.25 to 0.4 mm thick.

The kernel flakes are then conveyed to a stack cooker for steam conditioning, the purpose of which is to:adjust the moisture content of the meal to an optimum level, rupture cell walls (initiated by rolling), reduce viscosity of oil, coagulate the protein in the meal to separate the oil from protein materials.
The important factors are temperature, retention time and moisture content. In the palm kernel, the meals are normally cooked to a moisture content of 3 percent at 104-110°C.

Canola Oil Production

Canola oil is a key ingredient in many foods. Its reputation as a healthy oil has created high demand in markets around the world, and overall it is the third most widely consumed vegetable oil in the world.
Rapeseed was once considered a specialty crop in Canada, but canola now has become a major American cash crop, and rapeseed is the highest-producing oil-seed crop in the USA. Canada and the United States produce between 7 and 10 million tonnes of canola seed per year. Annual Canadian exports total 3 to 4 million tonnes of the seeds, 800 thousand tonnes of canola oil and 1 million tonnes of canola meal. The major customers of canola seed are Japan, Mexico, China, and Pakistan, while the bulk of canola oil and meal goes to the United States, with smaller amounts shipped to Mexico, China, and Europe. World production of rapeseed oil in the 2002–2003 season was about 14 million metric tons. In the 2010–2011 season, world production is estimated to be at 58.4 million tonnes. The United States is a net consumer of canola oil, having used 3 billion pounds in 2010, 2.5 billion of which was imported from Canada.

The Canola Oil Extraction
Step 1: Roll the seeds with a sheller to rupture cells and make the seeds easier to be extracted.
Step 2: Heat the seeds slightly and feed them to the oil press machine for the first process which removes some of the oil and compresses the seeds into canola meal.
Step 3: Canola meal undergoes further processing to remove the remaining oil content. The oil content in the rapeseed ranges from 37.5% to 46.3%. So this step can’t be neglected.
Step 4: Combine the oil extracted during each step , and then subject them to processing according to the end product requirements. Different treatments are used to process salad oils, margarines, and shortenings.
Canola Oil Nutrition 
Canola oil is low in saturated fat and contains both omega-6 and omega-3 fatty acids in a ratio of 2:1. If consumed, it also reduces low-density lipoprotein and overall cholesterol levels, and as a significant source of the essential, omega-3 fatty acid is associated with reduced all-cause and cardiovascular mortality. It is recognized by many health professional organizations including the Academy of Nutrition and Dietetics and American Heart Association. Canola oil has been given a qualitied health claim from the United States Food and Drug Administration due to its high levels of cholesterol-lowering fats.

Why the Prices of Oil Press is Same, But the Capacity is Different

If you plan to have an oil plant, you must know much of information about oil press. Maybe you have a problem about the relation between price and capacity. Now I will explain this question for you. Why the prices of screw oil press is similar, but the capacity is very different? The price is equal, but there are 3 T/D and 6T/D, and even more large capacity, why? The first reason, the material quality is different, will cause the price difference, that’s true. So, if the price is similar, but the capacity is different, may be the material quality of large capacity oil expeller is not very good. There are automatic screw oil press and traditional screw oil mill in the market. Compare automatic screw oil press and traditional screw oil expeller, the feature of automatic screw oil press is high degree of mechanization and automation, labor-saving, high working efficiency, and also the price is higher than traditional screw oil mill. Maybe there is other reason, in order to cater to the psychology of users, some manufacturers and dealers make a false report about capacity and performance. The truth is the capacity of oil press which press distance (the distance from feed to outlet) within 50 cm is not more than 400 kg/h, within 55 cm is not more than 500 kg/h. The detail information about how to choose and purchase screw oil press, please click here.

Distribution of Oil Crops in the World

If you are a newer to cooking oil industry or you cannot decide which oil you will trade. Then let’s analyze your location oil crops advantages together:
 

First, you need considerate what oil crops does it have in your area?
Now, I will list some oil crops all over the world for you.

In Africa: cotton (mainly distributed in North Africa, West Africa: Egypt, Sultan), oil sunflower, sesame, oil tea, oil palm (mainly refers to palm kernel, mainly distributed in West Africa, Central Africa), castor-oil plant, oil flax (mainly distributed in Mediterranean coast).

In Asia: soya bean (mainly distributed in China), oil sunflower (mainly distributed in China, India), sesame and almond (need hydraulic cold press and crushing), peanut (mainly distributed in China, India), rape (mainly distributed in China), cotton (mainly distributed in Central Asia; and Uzbekistan, Transcaucasia, China, India, Pakistan, Turkey, Iran and Syria and other countries), oil tea, oil palm (mainly refers to palm kernel, mainly distributed in Southeast Asia; Malaysia, Indonesia), castor-oil plant, oil flax (mainly distributed in Mediterranean coast).
And there are more coconut oil workshops in Philippines, Malaysia and Sri Lanka.

In North America: cotton (mainly distributed in the south of American), soya bean (mainly distributed in America and Canada), sunflower (mainly distributed in America), oil palm (mainly refers to palm kernel, mainly distributed in the southern part of North America).

In South America: sunflower (mainly distributed in Argentina), sesame, cotton (mainly distributed in Brazil, Mexico, Argentina), soybean (mainly distributed in Brazil, Argentina), rape (mainly distributed in Argentina), oil palm (mainly distributed in the northern part of South America)

In Europe: Rape (mainly distributed in France, Russia of Eastern Europe part), oil flax (mainly distributed in Mediterranean coast), sunflower (mainly distributed in Russia of Eastern Europe part)

After you know the distribution of oil crops, you will choose the easy-get raw material, thus the cost is relatively low, so that you can get more benefits.
After confirm your oil crops, you can further planning your oil plant.
Our oil press machine contains automatic screw oil press, screw oil press, hydraulic oil press, and other oil processing machine: oil refining plants, oil solvent extraction plant. We also have processing de-oiled cake machine; can help you turn waste into money; that is oil cake pelletizing equipment.
If you are interested in our oil press, please feel free to contact us. We will help you solve your problems

How to Choose and Purchase Screw Oil Press

Why these motor powers of many screw oil press are different, even if the capacity is same, the powers are also different? The motor power is greater, the capacity is higher, and the machine is better, is it right? Screw oil press is driven by the motor. The motor is the important part in the screw oil press equipment. Many friends have a misunderstanding to the power in the purchase, thought that the power is larger, the machine is better. In fact, it’s not. In fact, improve motor power as the high yield and capacity basis is not reliable. Motor power has a great influence on the long-term production of machine and the machine life. 
Summarized the reasons as the following elements: 

1. Increase press oil production cost, and the power consumption was improved.

2. Just improving motor power destroyed the machine's overall speed ratio. Motor power was increased, reducer speed ratio was unchanged, it will cause reducer runs non-normally and high-load for long-term, resulting in shortening the life of reducer, high failure rate, and impact production. Even if the reducer increase as the speed ratio, but the pressing chamber and pressing screw do not increase size, also lead the pressing screw speed is too fast. Oil crops were not squeezed fully in the pressing chamber, and flow out from the outlet with oil, thus reduce the oil yield.

3. Blindly increasing the power, in the processing, if there was foreign matter and hard objects in the oil, the oil press machine can not stop automatically, then the machine will force to press the foreign matter. It is easy to damage the oil equipment; and cause rupture of pressing screw and pressing chamber, and protection function of the oil press machine itself will doesn't work.

In the above condition, when the machine is working, the machine is not running stably. So the oil press machine often breaks up, such as, the spare parts was damaged, it is difficult to produce stably and highly for a long time.

In simple terms, this kind of change is just like installed an aircraft turbine engine in a car body.
Therefore, the capacity and size of oil press machine must be scientific cooperate to achieve the best effect. If you want to improve the capacity, keep the stable of oil yield and stable running of screw oil press machine for a long time, must be motor power, pressing chamber, gearbox improve at the same time. It is unrealistic just through changing the structure of machine to increase the oil output and improve the equipment performance, and can not reach the desired effects.

The Features and Nutritive Value of Common Oil Crops

1. Rape seeds. Rapeseed is only one high oil crop which can be cultivated all over the word. Rapeseed oil is generally dark yellow or brown. Rapeseed oil contains 0.4-1.0% arachidic acid, 14-19% oleic acid, 12-24% linoleic acid, 31-55% erucic acid, 1-10% linolenic acid. On the aspect of nutritive value, the human body absorption rate can be as high as 99% to rapeseed oil digestion, and has cholagogic function.
2. Soy bean. Soybean protein is the important component part of high quality soybean oil. Soybean contains 15% - 26% oil and 35% - 45% protein. The soybean oil has become the most important essential oil in the word. The main production countries of soybean are the United States, Brazil, Argentina, China, India, etc. Soybean is one of the main sources of cooking oil and vegetable protein (food and feed). Soybean oil contains up to 65% unsaturated fatty acids, including 52.1% linoleic acid and 2% to 10% linolenic acid. So soybean oil has quite a very high nutritional value, but it is lack of stability.
3. Cotton seeds. The whole cotton seeds contain 17%-26% oil, and seeds kernel contains about 40% oil. Cotton seeds oil contains 16%-23% saturated fatty acid. The main fatty acid of cotton seeds oil is composed of 22% palmitic acid, 18% oleic acid, 56% linoleic acid.
4. Sunflower seeds.Sunflower seed is native to Mexico, there are edible sunflower and multiple cropping oil sunflower, according to it’s purpose. About the common sunflower kernels, oily 29% - 30%, including 30 to 40% shell, 40% to 65% kernel oil. About multiple cropping oil sunflowers, mostly is small seeds, kernel is full enrichment, and thin hull, high kernel rate about 65% to 75%; kernel contains generally 45% to 60% oil. The peel of sunflower is mostly black or gray stripes, and is suitable for pressing. Sunflower seeds oil is a kind of senior quality edible oil, known as “nutrition”, contains unsaturated fatty acids and vitamin E which is easily absorbed by the body; sunflower seeds oil includs up to 70% linoleic acid, which can reduce the body's cholesterol. Sunflower oil can be used for making margarine, mayonnaise, and salad oil.
5. Peanut. Peanut is native to South American. Peanut kernel contains 45%-50% oil, 25%-31% protein. Peanut is the important source of edible oil and protein resource. Peanut oil is composed of 20% saturated fatty acid and 80% unsaturated fatty acid, main contains Oleic acid, linoleic acid, palmitic acid, it’s iodine value is about 80-110.
6. Sesame. Sesame contains 45-63% oil, and 19%-31% protein, known as “Oil queen”. Sesame oil is one of the oldest edible oil in the word. Sesame oil contains 35% - 49.4%oleic acid, 37.7% - 48.4% linoleic acid, and 4% - 12% arachidic acid. Use water extraction process method to get flavor sesame oil with more features in China
7. Tea-seeds. Tea-seed is native to China, and now grown in India, Vietnam, Indonesia and other countries. Tea-seed contains 30% oil, and 8%-9% protein. Tea oil has a high nutritional value and health care effect, known as the "Oriental olive oil”.
8. Rice bran. Rice bran contains 14%-24% oil. Rice bran is a by-product of rice processing. Rice bran oil is contains 40-52% oleic acid, 29-42% linoleic acid, 0.5-1.8% linolenic acid, 12-18% palmitic acid, 1.0-3.0% stearate, 4.5-6.5% phytosterols, and 0.1-0.5% oryzanol. Rice bran oil was known as a “nutritional oils”, with reduce serum cholesterol effect significantly.
9. Corn germ. Corn germ oil is extracted from corn germ. Corn germ oil is riched in essential vitamin E and unsaturated fatty acids for human body, such as linoleic acid and oleic acid, has a protective effect on cardiovascular and cerebrovascular. Corn germ oil contains up to 80%-85% unsaturated fatty acid.
10. Palm kernel. Palm kernel oil from the kernel of the palm fruit. Palm kernel oil contains a large amount of lower fatty acid. Palm oil was known as “the king oil in the world”. Palm kernel oil contains more than 80% unsaturated fatty acids. Liquid palm oil is a kind of nice frying oil.

How to Maintain Oil Press

Tips for maintenance of oil press machine in daily life:
1. During the usage of oil press, you should always check the outlet. If oil cake is not continuously coming out from outlet or stop keeping out, you should stop feeding and to move storage feed in inlet, so that, clear the blockage.
2. When the oil press is working, you should clean the oil residue continuously, to prevent the oil line is blocked. The oil residue can be pressed again.
3. If the oil expeller was wrong, and screw shaft was stop working, you should immediately turn off the machine. Open the discharging board, remove the screw shaft away.
4. Using lubricating grease and lubricating oil to lubricate every important parts of oil press machine regular.

Tips for maintenance of oil press machine under normal condition:
1. Check lubrication situation every 50 working hours. Reducer casing can not be short of oil. Fill butter into screw holes, no dry grinding.
2. Prevent dust and other impurities invading into every lubricating parts of oil press machine. Check the motor oil quality of reducer casing every year, if you found the change, you should replace all of the motor oil.
3. When the pressing capacity is reduced, and the oil cake or oil is not normal, you should take away screw shaft, check the wear condition of pressing worm, cage bar, and outlet devices, and then replace the wearing parts in time.
4. After working every time, you should clean the oil cake inside oil press machine and dust and oil dirt in the machine surface. Overhaul the whole oil expeller every six months. When maintenance, the oil press equipment must be disassembled, if damaged, need to repair or replace.
5. After production season,oil press machine is stored for a long time; you should do maintenance for it. And paint motor oil to pressing shaft, cage bar, and outlet devices, and then, put them in dry place.