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pellet machine die

inside look on dies for wood pellet making machine

inside look on dies for wood pellet making machine

A pellet die implies a metal part comprising of either flat or ring-shaped holes, in which the roller uses to force raw materials under pressure to make pellets. Ideally, the pellet die is driven by the motor of a pellet mill. The features and overall size of the pellet is dependent on the size of holes alongside the thickness of pellet die

Apparently, pellet dies work along with the roller to execute the pellets during the process of pelletizing. The force of the roller acts on the feed stocks in contact with the die, consequently compressing and extruding the pellets. Conversely, the radial force coming from pellet dies resists the feed stock that flows through the holes of the die. And, since the two resilient forces interact together, the feed stocks are manufactured into pellets.

The pelletizing chamber distributes the feed stocks evenly across the face of pellet die. This is where the rollers and the cross face of pellet dies press the feed stocks, consequently forcing them through the die holes to mold pellets. The pellets are usually cut off and shaped when extruded out of the pellet die.

The two common die designs used in wood pellet machine at the contemporary market include the flat die and ring die. A flat die is small in size, light in terms of weight, easy to clean, easy to maintain, and cheaper than its ring die counterpart. On the contrary, ring dies are large in size, durable, heavy in weight, high capacity, and are expensive. Ring dies dont wear easily and feature low energy consumption as well.

Flat die is adopted by homemade pellet machines or small wood pellet machines for the low production cost and low purchase price. The ring dies, on the other hand, are installed in the large scale pellet machines as they suit the high productivity. Regardless of the shape of the die, the die is used to determine the overall performance of the pellet production line. This simply implies that the pellet die is a vital component of a wood pellet mill.

The pellet die design is crucial since the pellet die directly affects the quality of pellet along with the production capacities of pellet mill. The same design may equally pose a huge impact on operation performance and working die life. The following factors determine the pellet die design:

The thickness of wood pellet making machine is a decisive factor that needs to be considered. The thickness of the die may further be divided into effective thickness and total thickness. The total thickness implies the overall thickness of the die, which is bigger in comparison to the effective thickness of the die.

The effective thickness of the die implies the working thickness of the pellet die, whereby the pellets are molded. Usually, the die tends to be studier when its thicker. The increments of a pellet die thickness differ by just 1/4 between 11/4 and 5 thick.

The thickness influences the flow of materials through the die. If its quite deep, the biomass materials lack adequate compression to make pellet. Nevertheless, if its quite shallow, the biomass materials get the machine blocked thus shortening the service life of the machines.

This refers to the depth difference between the pellet die effective thickness and total thickness. The overall design of the relief depth is used in enhancing the strength of a pellet die by adopting thicker die. Similarly, the design of relief depth is used to promote the flowing rate of the feed stock.

Pellet dies are made of metals that determine the working life along with the features of pellet dies. In general, pellet dies are made of metals like stainless steel, alloy, and Chrome-Plus stainless steel, among others.

Alloy pellet die is suitable for palletizing some common feedstocks. Nevertheless, stainless steel pellet die performs better. Stainless steel provides better resistance to agents of corrosion, scoring, and pitting. The Chrome-Plus stainless steel pellet die is the best for pelletizing ingredients that boast strong corrosive or abrasive qualities.

The type of die hole is another essential aspect worth your consideration. Presently, the state-of-the-art step-shaped die is the most successful and mature design that suits pellets production, particularly when it comes to wood pellet production. This design extends the service lifespan for a ring die thats well-known to be vulnerable to agents of wear and tear.

The hole count refers to the total number of die holes present in a die. Kindly note that the higher the number of holes, the better the production capacity and the lower the pellet die strength. The hole count directly influences the pellet die production capacity alongside the die working life.

The pellet die specs may include the inlet angle, inlet diameter, total & effective thickness, hole count, drill pattern, and relief depth. The C.R. Starks study suggests that the die specifications comprising of the factors mentioned herein may largely influence the quality of the pellet.

In a nutshell, there are a lot to be discussed as far as wood pellet making machine and pellet die is concerned. The Gemco Bio-fuel Machinery Lab. is here to provide instant and professional solution regarding pellet dies or wood pellet machines. Find more info on our Facebook page. Kindly share the info presented with your friends and colleagues. Let them learn as well.

pellet dies - feed mill machinery glossary

pellet dies - feed mill machinery glossary

The mass majority of feeds are pelleted, which means that they require to go through a pellet mill or a pelleting press. Inside the pellet mill the most important part for producing the pellets is the pellet die. This is the part that the mixed mash feed formula is pushed/pressed into small holes in a die. The result is pelleted feed coming out of the other side of the pellet die.

See the picture on the left for actual positioning on the cross-section of a die D = Hole Diameter: Typical hole diameters for feed can range from around 1.6mm up to 8-10mm L = Effective Length: The effective length is the die thickness that actually performs work on the feed. T = Total Thickness: Total thickness is the overall thickness of the die. Overall thickness provides the necessary die material to avoid breakage. Of the die R = 'Relief' (or also known as (X) Counterbore Depth): 'Relief' or Counterbore depth measures the relief provided in the die as the pellet exits the die hole. Enlarged holes are counterbored into the die to reduce its effective thickness and provide the proper L/D ratio while maintaining the total thickness needed to prevent breakage of the die. Specific rows of die holes, such as the two inner and outside rows, also sometimes are counterbored to greater depths to encourage feed flow through these outer rows of holes to help dies wear more evenly, this is referred to as (VR) variable relief. More examples of various die relief patterns can be seen in this diagram: Pellet die reliefs

D = Hole Diameter: Typical hole diameters for feed can range from around 1.6mm up to 8-10mm L = Effective Length: The effective length is the die thickness that actually performs work on the feed. T = Total Thickness: Total thickness is the overall thickness of the die. Overall thickness provides the necessary die material to avoid breakage. Of the die R = 'Relief' (or also known as (X) Counterbore Depth): 'Relief' or Counterbore depth measures the relief provided in the die as the pellet exits the die hole. Enlarged holes are counterbored into the die to reduce its effective thickness and provide the proper L/D ratio while maintaining the total thickness needed to prevent breakage of the die. Specific rows of die holes, such as the two inner and outside rows, also sometimes are counterbored to greater depths to encourage feed flow through these outer rows of holes to help dies wear more evenly, this is referred to as (VR) variable relief. More examples of various die relief patterns can be seen in this diagram: Pellet die reliefs

L = Effective Length: The effective length is the die thickness that actually performs work on the feed. T = Total Thickness: Total thickness is the overall thickness of the die. Overall thickness provides the necessary die material to avoid breakage. Of the die R = 'Relief' (or also known as (X) Counterbore Depth): 'Relief' or Counterbore depth measures the relief provided in the die as the pellet exits the die hole. Enlarged holes are counterbored into the die to reduce its effective thickness and provide the proper L/D ratio while maintaining the total thickness needed to prevent breakage of the die. Specific rows of die holes, such as the two inner and outside rows, also sometimes are counterbored to greater depths to encourage feed flow through these outer rows of holes to help dies wear more evenly, this is referred to as (VR) variable relief. More examples of various die relief patterns can be seen in this diagram: Pellet die reliefs

T = Total Thickness: Total thickness is the overall thickness of the die. Overall thickness provides the necessary die material to avoid breakage. Of the die R = 'Relief' (or also known as (X) Counterbore Depth): 'Relief' or Counterbore depth measures the relief provided in the die as the pellet exits the die hole. Enlarged holes are counterbored into the die to reduce its effective thickness and provide the proper L/D ratio while maintaining the total thickness needed to prevent breakage of the die. Specific rows of die holes, such as the two inner and outside rows, also sometimes are counterbored to greater depths to encourage feed flow through these outer rows of holes to help dies wear more evenly, this is referred to as (VR) variable relief. More examples of various die relief patterns can be seen in this diagram: Pellet die reliefs

R = 'Relief' (or also known as (X) Counterbore Depth): 'Relief' or Counterbore depth measures the relief provided in the die as the pellet exits the die hole. Enlarged holes are counterbored into the die to reduce its effective thickness and provide the proper L/D ratio while maintaining the total thickness needed to prevent breakage of the die. Specific rows of die holes, such as the two inner and outside rows, also sometimes are counterbored to greater depths to encourage feed flow through these outer rows of holes to help dies wear more evenly, this is referred to as (VR) variable relief. More examples of various die relief patterns can be seen in this diagram: Pellet die reliefs

Die working area is the area inside of the two die grooves. As the pellet dies' width and diameter so to does the working area. The die working area is very important as different feed ingredients and feeds require a specific time inside the die holes, known as die retention time, in order to be able to bind together and form pellets. With larger working areas on dies there is greater retention time to form pellets, which in turn reduces power consumption per tonne of feed pelleted and helps to improve production efficiency.

L/D Ratio: The L/D ratio is the effective length (L) divided by the hole diameter (D). High L/d ratios provide high pellet die resistance as feed moves through the hole. Low L/d ratios provide less resistance. Each material has an L/D ratio requirement to form the material into a pellet.

I=Cube inlet diameter: The diameter of the inlet where the feed enters the compression area of the pellet die. Different configurations of the inlet (countersinks, tapered inlets, well inlets, etc) can be used to achieve extra compression if needed for particular materials.

F=Total depth of well and choke: This measurement is the difference of the effective length and the total thickness of the die. It is the depth of the feed travel in the inlet to reach the effective pellet compression area.

study on dies for wood pellet machines

study on dies for wood pellet machines

Flat die and ring die, for General, are the two dominated die designs used in wood pellet machine at present market. Roughly speaking, the flat die is usually adopted by small wood pellet machine or homemade pellet machines for the low production cost and low purchase price while the ring dies are generally installed in the larger scale pellet machines for the high productivity. No matter what the die shape is, the die determines the performance of the pellet production line. Thats to say, the pellet die is the most important component of a wood pellet machine. Today, Gemco Bio-fuel Machinery Lab wants to share with you something about the pellet die.

The die is the metal part with holes, either flat or ring-shaped, in which the roller forces raw material under intense pressure to produce pellets. It is also one of pellet machines most problematic parts. Flushing the die helps mitigate one of the most common problems: excessive blockage. This process essentially smoothes the bored interior of the die's holes in which burrs may remain from the manufacturing process. To flush the die, mix fine sand in with the raw material along with a generous amount of oil. Recycle this mixture through the machine after it is discharged. Continue doing this for about ten minutes. Afterward you will notice that blockage occurs far less frequently.

The die hole type is another important issue. At present, the state-of-the-art step-shaped die hole has been practically proved to the most successful and mature design for pellets production and, in particular, for wood pellet production. This picture below shows what a step-shaped ring die hole looks like:

Thickness or the depth of the wood pellet mill die is another factor needs to be considerate. The thickness or the depth of hole has a decisive influence on how the material flows through the die. If it is too deep, the biomass materials cannot get sufficient compression to form pellet. And on the contrary, if it is too shallow, the biomass materials will get the pellet machine die blocked easily and shorten the service life of wood pellet machines.

pellet press machine | electric ring die pellet mill for sale

pellet press machine | electric ring die pellet mill for sale

Pellet press machinefrom Beston employs ring die design, which is driven by electricity. The electric ring die pellet mill is easy to operate. Once it is powered on, it can keep working for 24 hours a day. Beston has various pellet making machine for sale, which can process 1 to 3 tons of raw materials, such as wood, sawdust, grass, straw, etc. Of course, the pellet making machine price will be different from the capacity. If you want more details, please contact us now!

Remarks: 1. The parameters here are based on the pellet press die with an 8 mm diameter. 2. We can also make 6-mm, 10-mm, 12-mm, or larger pellet making machine. As for the same machine and the same materials, the larger the diameter, the higher the capacity.

Pellets are widely used as fuel, fertilizer, and animal feed. They are made from various agricultural wastes and wood residuals, for example, sawdust, wood shaving, tree branch and barks, rice husk, peanut shell, straw, sugarcane bagasse, palm fiber, corn stalk, bamboo, etc. It is cheap even free to get these raw materials, which makes the pellet production business more profitable. While there are also some requirements on the raw materials when using a biomass pelleting machine.

Beston Machinery offers grinder and dryer machine for pre-treatment. Besides, the molds for different raw materials may be different as well. We suggest you test your materials before purchase to choose the most suitable molds.

Ring die pellet press machine uses a ring-shaped die and rollers, which is often for large scale pellet production system. When raw material enters this chamber, it will be pushed on the inner surface of the ring die with the rotation of the rollers. With the press of the roller, the raw material powder will be extruded out of the ring die as pellets and then be cut into 3-5 cm pieces. This process high temperature and high pressure. Thats why the new-discharged pellets are too hot to touch directly.

Beston pellet press machine price ranges from US$20,000 to $45,000. It is mainly different from the capacity. There are many cheap pellet making machines for sale on the market, which can process 100 kg of raw materials per hour. While the capacity of Beston machine is from 1,000 to 3,000 kg/h.

In addition, the pellet mill machine price is also affected by the design. Beston pellet machine uses ring die and vertical feeding system. And it is of integrated design, which contains a dust collector itself. Except for being eco-friendly, it is also convenient for delivery. Besides, it is made of Q235B steel, which is durable to use. All these features make it worthy to buy. More than that, Beston Machinery can customize the layout design of your workshop for free, as well as a workflow chart. Also, we will help with your installation online.

But you may need different auxiliary equipment according to your materials. Of course, the pellet mill cost will be different. In order to choose a suitable ring die and model, you can send us some samples to test before your purchase.

The advantages of biomass pellets include small in size, high energy content, and high density. So it can lower transport and storage costs. Also, it recycles waste into something useful, which is beneficial for the environment and the investors. Thats why it is wise to set up a pellet production line. Below are some tips for you to start a pellet making business.

Beston Machinery has stand-alone pellet making machine for sale, as well as a complete pellet mill, including grinder and dryer. Also, the diameter of the pellet mill die can be customized, except for 6 mm, 8 mm, 10 mm, etc. If you are interested to buy a pellet mill, please contact us for details.

choose pellet mill die specifications and design-palet

choose pellet mill die specifications and design-palet

The die is the core component in the pellet mill. And it is the key to making wood pellets. According to incomplete statistics, the cost of the pellet mill die loss accounts for more than 25% of the maintenance cost of the whole production workshop. For every percentage point increase in fees, your market competitiveness drops by 0.25%. So the pellet mill specifications is extremely important.

Qingdao palet is a professional wood pellet mill supplier in china. We supply ring die pellet mill, flat die pellet mill and the pellet mill parts,such as flat die, ring die, pellet mill roller, and other parts for the pellet machine.

As we all know, the flat die pellet mill is different from thering die pellet mill, but the die design follows the same reason. After carburizing and quenching treatment, the die hardness is 55-60HRC, The working life of a flat die is 300-500 hours. When one side has worn out, the die can be used with the other side. And the output of a ring die is 5000-8000 ton, it should be repaired with the die repair machine in the factory.

The pellet mill die is generally made of carbon steel, alloy structural steel or stainless steel through forging, machining, drilling holes, and heat treatment processes. The user can choose according to the corrosion of the particle raw material. The material of pellet mill die should be made of the alloy structure steel or stainless steel ring mold.

Carbon structural steel, such as 45 steel, its heat treatment hardness is generally 45-50 HRC, it is a low-grade ring die material, its wear resistance and corrosion resistance are poor, now basically eliminated.

Alloy structural steel, such as 40Cr, 35CrMo, etc., with heat treatment hardness above 50HRC and good integrated mechanical properties. The die made of this material has high strength and wear resistance, but the disadvantage is that corrosion resistance is not good, especially for fish feeding.

The price of the ring dies, which are made of material, marigold pellets, wood chips, straw pellets, etc., is much higher than stainless steel. Both 20CrMnTi and 20MnCr5 are low-carburizing alloy steels, both of which are the same, except that the former is Chinese steel and the latter German steel. Since Ti, a chemical element, is rarely available abroad, 20CrMnTi or 20CrMn from China is used instead of 20MnCr5 from Germany, so it does not fall within the scope of alloy structural steel. However, the hardened layer of this steel is limited by the carburizing process to a maximum depth of 1.2 mm, which is also an advantage of the low price of this steel.

Stainless steel materials include German stainless steel X46Cr13, China stainless steel 4Cr13, etc. These materials have better stiffness and toughness, higher heat treatment hardness than carburized steels, hardened layers than carburized steels, and good wear and corrosion resistance, resulting in longer life and naturally higher prices than carburized steels. Due to the long life of the stainless steel die steel, the replacement frequency is low and therefore the cost per tonne is low.

According to nature of raw material, the ratio is 8-15, The user chooses the compression ratio of the die, and adjusts the specific compression ratio, such as selecting a slightly lower compression ratio, which is beneficial to increase the output, reduce the energy consumption, reduce the wear of the ring mold, but also reduce the quality of the particles, such as the pellets is not strong enough, the appearance is loose and the length is different, and the powder rate is high.

The opening rate of the pellet mill die is the ratio of the total area of the die hole to the effective total area of the die. In general, the higher the opening rate of the die, the higher the particle yield. Under the premise of ensuring the strength of die, the opening rate of the ring die can be improved as far as possible.

For some raw materials, under the condition of a reasonable compression ratio, the pellet mill die wall is too thin, so that the die strength is not enough, and the phenomenon of exploding die will appear in the production. At this time, the thickness of the ring die should be increased under the premise of ensuring the effective length of the die hole.

Ring die holes are extremely demanding in terms of processing and processing equipment, and for stainless steel, special gun drills and vacuum heat treatment equipment are required to produce high quality ring dies. The excellent high temperature vacuum quenching process can significantly improve the rigidity, hardness, abrasion resistance, fatigue strength and toughness of steel. However, the ability to guarantee a balanced hardness layer for every die hole requires a high level of processing skills and long experience.

Surface roughness is also an important indicator of ring die quality. In general, a small value of inner wall surface roughness will improve the quality of the fit, reduce wear and extend the life of the ring die, but the cost of processing the ring die will increase.Ring hole roughness also affects the compression ratio and forming of the particles, as well as production efficiency. At the same ring die compression ratio, the lower the roughness value, the lower the extrusion resistance of wood chips or feed, the smoother the discharge, the higher the quality of the pellets produced and the higher the production efficiency. Good ring die hole processing can be up to 0.8-1.6 microns, ring die roughness is about 0.8 microns, the correct machine on the disposable material, no grinding.

Straight tooth pellet mill roller (fine tooth): suitable for small pore diameter (below 2.5), fine soft material; commonly known as through slot.Straight teeth pellet mill roller (coarse teeth): suitable for conventional materials, conventional bore diameter (above 2.5); not grooved.Pore pellet mill roller: can effectively control slippage, suitable for large models, or slippery materials.Herringbone teeth pellet mill roller: change the uniformity of the material layer and improve the wear process of the press roll.Straight teeth with perforations at both ends: a solution for changing the material on both sides of the pellet mill die, which is not easy to materialize and causes abnormal wear.

The working gap between ring die and roller must be reasonable, it has an important influence on the correct use of ring die. Generally speaking, the gap between the ring die and the pressure roller is 0.1-0.3 mm. From the practical experience, it is better to press the roller to reach the state of like turning non-rotating while rotating the ring die by hand.

If the gap between the ring die and the roller is too large, the material will slip between the roller and the ring die. If the gap between the ring die and the roller is too small, the roller is too small, it will lead to increased wear of the ring die and roller.

According to the adjustment experience of using automatic pellet mill, and we detect the gap between the pressure roller and the ring mold, the gap between the ring die and the pressure roll is adjusted small when the pelletizing is starting.And the gap between the ring mold and the pressure roll is adjusted as much as possible during normal pelletizing, which is beneficial to improve the pellets quality.

In addition, when adjusting the gap between the ring die and the pressure roll, we should pay attention to the adjustment direction of the pressure roll, the adjustment direction of the pressure roll should be opposite to the steering of the ring die, and the wrong adjustment of the gap between the pressure roll and the ring die can easily damage the ring die.

Qingdao palet machinery co,.ltd is a professional manufacturer of biomass wood pellet mill, wood pellet plant, rotary dryer, activated carbon rotary klin,activated carbon machine, hammer mill, crusher, etc.

small electric flat die pellet mill for making feed/wood pellets

small electric flat die pellet mill for making feed/wood pellets

The same as Diesel Flat Die Pellet Making Machine, electric flat die pellet mill is also called small pellet mill. With small size and cheap price, our electric flat die pellet millis an ideal choice for small scale pellet production. It can not only produce animal feed pellets, but also make wood pellets as green fuel with almost all kinds of biomass materials. The finished pellets have smooth surface and high density. Electric pellet mill adopts electric motor to drive the machine, which is environment friendly and energy saving.

Features of Our Electric Flat Die Pellet Mill 1. Motor is adjustable according to the voltage of your region. 2. Besides the alloy steel flat die, we can supply the stainless steel flat die, double working life. 3. Both the flat die and rollers adopt superior alloy steel which has high wear resistance and long service life. 4. Both sides of the flat die can be used, so that the service life is doubled. 5. The die and rollers can be changed fast and conveniently due to the quick disassembling type precisely-cast die clamp. 6. This electric pellet mill adopts gear transmission, having low noise and good cushioning effect. 7. Voltage can be customized to meet the requirement of your local conditions. 8. All pellet machines are CE certified, which proves the excellent quality of our pellet making machine.

Wide Application of FANWAY Small Pellet Mill Suitable for home use, farm use, and small scale pellet production. Can be used as feed pellet mill which is suitable for making feed pellets for various poultry and livestock: chicken, rabbit, etc. Can be used as wood pellet machine that is suitable for making wood pellets for home heating stoves, hot water boilers and industrial boilers, biomass powerplants and so on. This electric pellet mill can be combined with electric wood hammer mill, pipeline sawdust dryer, screw conveyor, etc. to compose small mobile biomass pellet plant which is more cost effective for small wood pellet producer. Produced wood pellets can also be used as animal bedding.

Raw materials for FANWAY Pellet Making Machine Raw material for animal feed pellets: Various grains including corn, soybean, soybean meal, rice, alfalfa, etc. Raw material for wood pellets: Almost all biomass materials such as wood chips, wood shavings, sawdust, bamboo, corn cobs, rice husk, coffeehusk, palm kernel shell, peanut shell, sugarcane bagasse, straw, leaves, grass, paper, etc.

Requirements for Raw Materials Size: less than 6mm, otherwise you may need a hammer mill. Moisture content: 8%-15%. (These can affect the quality of pellets and the productivity of the pellet mill)

Electric Flat Die Pellet Mill Working Principle When the pellet mill works, the material will be pressed into the die hole under the extrusion force between the die and rollers. Then the pellets will be cut into certain length by the cutting knives near the die. The diameter of the die hole will determine the diameter of the pellets. We have flat die of hole diameter from 2.5-10mm for making feed pellets and 6-12mm for making wood pellets for you to choose. You can get different pellet length by adjusting the distance between the die and knives.

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