Category: Blog

Speed

In terms of speed, both Premade Pouch Packing Machine and Form Fill Seal Machine have good performance. After all, they have evolved over decades. The current high-speed Premade Pouch Packing Machine and Form Fill Seal Machine can reach the highest Faster packaging speed of 60-100.

The packaging speed has a lot to do with your materials because usually the final packaging speed is determined by the weighing and filling equipment. If the feeding speed cannot keep up with the fast sealing speed, it will not help. Another important factor is the style of the packaging bag. Complex packaging bags will slow down the packaging speed because there are more steps than simple packaging bags. There are many products on the market that are optimized for speed, but usually, the price will be much higher, and the accuracy of packaging will decrease. So please remember that fast is not necessarily good. It is the most important thing to be able to meet the unique packaging needs of your products because you can increase the speed by buying multiple machines and configuring multiple product lines. Of course, this also needs to be based on your plant space to decide.

All in all, the Form Fill Seal Machine has the upper hand in speed, but there are many ways to make up for this, speed is not the most important.

Exterior

In terms of appearance, Premade Pouch Packing Machine undoubtedly beats Form Fill Seal Machine. Using Premade Pouch Packing Machine allows you to stand out in appearance and user ease of use, such as spout pouch, zipper pouch, stand up pouch, and so on. If you want to get this advantage, you must choose Premade Pouch Packing Machine. In addition, even for the pillow bag that Form Fill Seal Machine is good at, using Premade Pouch Packing Machine packaging will still be more beautiful than Form Fill Seal Machine, because Premade Pouch Packing Machine uses Premade Pouch, which makes the edge of the bag more neat and beautiful. The Form Fill Seal Machine will use a large roll of Rollstock to seal the edges while feeding, so the edges are not neatly sealed.

All in all, Premade Pouch Packing Machine can pack many bags that Form Fill Seal Machine cannot pack. Even if Form Fill Seal Machine can pack, Premade Pouch Packing Machine far exceeds Form Fill Seal Machine in appearance.

Cost

No matter when the price is a very important factor. Although the cost involved in the entire packaging process is very difficult to calculate, in general, the price of Premade Pouch Packing Machine will be higher than that of Form Fill Seal Machine. We will calculate the packaging below. Cost in each process:

Machine

The first is the cost of the machine. There is no doubt that the price of Premade Pouch Packing Machine is higher than that of Form Fill Seal Machine because it is more complicated.

Packaging Materials

The second is the cost of packaging materials. We learned from the packaging material manufacturers we cooperated with that the price of Premade Pouch for each packaging bag is higher than Rollstock. This is easy to understand. After all, Premade Pouch will have more processes, but in the long run, You will also bear some additional costs on Rollstock, such as higher labor costs and the disposal of Rollstock waste. However, there are some advantages of using Rollstock, such as being more flexible. When changing the packaging, the same Rollstock can be packed in many different sizes, and the Premade Pouch Packing Machine may leave you with a large amount of inventory, which you may not be able to use. The Premade Pouch of the previous product caused waste. In addition, some premade pouch packaging machines (including ours) have safety systems: no bag open, no filling, and sealing, wrong bag open, will not enter the next process, increase the bag using rate. Vertical packing machine will cause waste.

All in all, the price of Premade Pouch Packing Machine will be higher than that of Form Fill Seal Machine, whether it is the cost of the machine or the cost of packaging materials.

Operability

In terms of operability, I think you don’t have to worry about it. After years of development, most of the machines are already very easy to operate. Our machines are equipped with detailed instructions. At the same time, we can also guide the operators on-site, although the Premade Pouch Packing Machine There are indeed many differences in the operation of the Form Fill Seal Machine, you should not decide your choice because of this.

Other

Although there are still many places that can be compared, such as accuracy, stability, power consumption, volume, etc., they are all related to the different solutions of different machinery companies. Most of them cannot be compared objectively. However, for Echo Machinery, our Premade Pouch Packing Machine will have more advantages.

TL;DR

If you have enough budget, or you are a relatively high-end product in the industry, you should choose Premade Pouch Packing Machine, otherwise, you should choose Form Fill Seal Machine. If you have any questions about this, please consult our customer service staff. We tailor the corresponding production line for you according to your industry.

Patents

We have 21 inventions patents, 75 utility model patents, and 3 design patents. The following is a list of our patents, you can confirm these patents through the website of the CNIPA(China National Intellectual Property Administration), 浙江名瑞 is the name our company uses in China(This list may be outdated, everything is subject to CNIPA)

Patent No/Authorized Number	Patent type	Application date/Authorization Date
2021106206525 / CN113184283A	Inventions Patents	2021.06.03
2021106206563 / CN113184280A	Inventions Patents	2021.06.03
2021104545106 / CN112960182A	Inventions Patents	2021.04.26
2020110017038 / CN112009762A	Inventions Patents	2020.09.22
2020110017061 / CN112009763A	Inventions Patents	2020.09.22
2019104875310 / CN110155746A	Inventions Patents	2019.06.05
2017110217333 / CN107934086B	Inventions Patents	2019.12.17
201610585501X / CN106043815B	Inventions Patents	2018.8.14
2016105523955 / CN106043815B	Inventions Patents	2018.2.23
201510450236X / CN105151731B	Inventions Patents	2017.10.20
2014103052597 / CN104108486B	Inventions Patents	2016.6.29
2014100583522 / CN103770973B	Inventions Patents	2016.2.3
2010101294358 / CN101837845B	Inventions Patents	2011.8.24
2018103490142 / CN108557174A	Inventions Patents	2018.04.18
2018103487008 / CN108408141A	Inventions Patents	2018.04.18
201711268522X / CN107934039A	Inventions Patents	2017.12.05
2016105741714 / CN106043812A	Inventions Patents	2016.07.21
2016105856690 / CN106043796A	Inventions Patents	2016.07.21
201410368277X / CN104150052A	Inventions Patents	2014.07.30
2014101617668 / CN104003024A	Inventions Patents	2014.04.21
2012104415546 / CN102920360A	Inventions Patents	2012.11.08
2012103049627 / CN102777560A	Inventions Patents	2012.08.26

Many people may not know that it is very easy to apply for design patents in China, followed by utility model patents. The most difficult one is invention patents. Invention patents require substantial innovation and will be subject to strict review(Only about 1/4 of our inventions patents application was approved). Many machinery companies may claim to have a lot of patents, but they may only have design patents that have no technical content in the industry.

Hardware

Transmission Part

Our transmission has a T-shape layout, which is more concise than the concave-shape layout used by some machines. This kind of transmission is more efficient and more stable.

In order to ensure the stable operation of the machine at high speed, our cam indexers are specially customized. They have particularly large torque, sealed lubrication, and very high accuracy. The entire transmission part has undergone a destructive test of 180 times per minute for 3 months.

Frame

Processes: raw materials(special carbon steel) → rough finish → soldering → temper → CNC finish machining → assembly

The frame adopts the integrated processing method of welding and milling to ensure that the frame is not easily deformed. It directly determines the stability and precision of the equipment. The frame plate is twice the thickness of the ordinary frame, and the chassis thickness is 30mm, making the weight of the machine up to 3.5 tons(The heavier the frame, the more stable the machine). These all directly determine the stability and precision of the equipment.

lubrication

Our machine adopts a circulating oil supply system, which directly injects into the inside of each bearing and the surface of gears and cams to form an oil film to eliminate the heat of high-speed operation and ensure that the cam is not broken for life.

Cam

Using curved indexing cam: The structure is medium-loaded, high-speed, and high-precision indexing. The box body is closed, the whole is soaked in oil, it is not easy to wear and no impurities enter. As mentioned before, our cam will not be damaged, so we can provide a lifetime warranty.

Cam processing technology: Blank → Fine Turning → Rough Milling → Drilling and Tapping → Quenching → Sandblasting (surface treatment) → Internal Grinding → Fine Milling → Coding → Wire Cutting → Blackening

Vacuum Chamber

The Vacuum Chamber is made of aviation aluminum directly engraved and milled in the computer processing center to ensure airtightness and durability.
The specific process is: original blank → milling → oxidation

Given Bag Turntable

The original high-speed bag-feeding turntable adopts a 10-station design. More stations provide more industrial packaging process requirements under high-speed conditions. The strengthened turntable seat and turntable shaft sleeve are made of 304 stainless steel, which has great anti-corrosion performance improve.

The center shaft is integrally processed with imported special steel (post-processing with 45 steel welded flanges for ordinary machines).

Whether it is bag loading, bag opening, or bag support, it is designed and manufactured at a rate of 120 times per minute. The bag support does not need any slot and roller, and the driving only relies on the cam, which is still stable and does not shake at a speed of 100 times per minute.

Vacuum Turntable

The vacuum turntable bearing seat, bearing and turntable are all redesigned and manufactured, and the rigidity and strength are more than twice that of the others machine.

The outlet direction of vacuum pipes, air pipes, water pipes, etc. can be adjusted according to the layout of the customer’s workshop.

Cleaning and Maintenance

Above the frame table, the part that may be in direct contact with the package is made of 316L stainless steel, and the other parts without special process requirements are made of 304 stainless steel, and the surface is brushed or polished. When cleaning, just wipe it with a towel and detergent.

Above the frame table, the transmission bearing adopts stainless steel bearing or igus oil-free bearing. The rolling bearing is equipped with a waterproof oil seal and is equipped with an oil injection hole, which can not only fully maintain the lubrication performance and life of the bearing, but also prevent the corrosion of the bearing.

Above the frame table, all installation holes are treated with waterproof glue to prevent water from entering the frame.

Software

MServer

MServer system, through the Internet (Ethernet, 4G, Wi-Fi, etc.) to transmit data or programs of a large number of industrial equipment in different areas to the remote cloud data center to realize remote data monitoring, equipment diagnosis, program maintenance, fault alarm, and other functions. Provide users with a simple and reliable industrial Internet data remote transmission program.

Component	Description
Device Side	FBox and the connected device controller, HMI and instrument, etc.
Server	MServer cloud server group or users build private cloud server,can connect to MES system.
Client	PC client/WEB client, mobile APP, and OPC docking with the host computer, API (HTTP or SDK).

Protective Function

Software Copyright

We have four software copyrights, which correspond to our different machine models, you can confirm these software copyright through the website of the CNIPA(China National Intellectual Property Administration).

Name	No.	Date
MR8-200RN V1.0	2018SR889576	2018.9.6
MRZK-160N V1.0	2018SR894779	2018.9.13
MRZK-120N V1.0	2018SR890884	2018.9.14
MRZK-90N V1.0	2018SR890873	2017.8.26

History

For a long time, the problem of sticking sticky objects to metal remained unsolved, and in 1938, Roy J. Plunkett of the DuPont Company stumbled upon a material, Teflon(PTFE):

 (Teflon) was an accidental invention—unlike most of the other polymer products…. Plunkett’s first assignment at DuPont was researching new chlorofluorocarbon refrigerants…. When he and his helper prepared a cylinder for use, none of the gas came out——yet the cylinder weighed the same as before. They opened it and found a white powder, which Plunkett had the presence of mind to characterize for properties other than refrigeration potential. He found the substance to be heat resistant and chemically inert, and to have very low surface friction so that most other substances would not adhere to it.He found the substance to be heat resistant and chemically inert, and to have very low surface friction so that most other substances would not adhere to it. Plunkett realized that against the predictions of polymer science of the day, TFE had polymerized to produce this substance—later named Teflon—with such potentially useful characteristics.

Teflon is actually called Polytetrafluoroethylene (PTFE), and Teflon is the trademarked name.

It was patented by DuPont Company in 1941, trademarked as “Teflon” in 1944, and subsequently developed under such names as Teflon AF, Teflon FEP, Teflon FFR, Teflon NXT, and Teflon NXT, Teflon PFA and some other listed products like that. It was in 1954 when French engineer Marc Gregoire and his wife Colette invented the Nonstick pan, and the material began to find its way into the homes of ordinary people. The most famous use of PTFE was at the 2008 Beijing Olympic Games, as the Olympic Games aquatic events arena Water Cube, the exterior of which was completely covered with PTFE, which is the largest concentration of PTFE in the world.

PTFE is resistant to acids, alkalis, high temperatures and is virtually insoluble in all known solvents, and most importantly he has a coefficient of friction of only about 0.1, making it an ideal oil-free lubricating material, which is the only known surface to which the gecko cannot currently attach.

MF	(C2F4)n
CAS Number	9002-84-0
UNII	E1NC1JVS3O
EINECS	618-337-2
Melting Point	327°C
Boiling Point	400°C
Density	2.15 g/mL (25°C)
Merck	14,7562
Stability	Stable unreactive with most materials. Incompatible with molten alkali metals, fluorine and other halogens, strong oxidizing agents.
NIST Chemistry Reference	Polytetrafluoroethylene, annealed(9002-84-0)
IARC	3 (Vol.19, Sup 7) 1987
EPA Substance Registry System	Polytetrafluoroethylene (9002-84-0)

Application on Multihead Weigher

As a matter of course, PTFE is also used in multihead weigher as a non-stick material. A typical example is cheese packaging machine, Cheese has a very high viscosity. Ordinary metals will stick to its surface, blocking the weight cup and making the weighing inaccurate. However, a machine with a PTFE coating on the surface can solve this problem perfectly:

As the video shows, cheese was weighed smoothly, just like any other material. In addition to cheese, it also works well on high viscosity gummy candy, brown sugar, and candied fruit. You can check out our Cheese Packaging Machine to know more.

And regarding its food safety, some people do worry that PTFE is toxic, so many cooks refuse to use Nonstick pan with PTFE. However, this is not a problem, DuPont conducted a large number of experiments, it is completely non-toxic at room temperature, when the temperature reaches 260 ° C began to deteriorate, at 350 ° C began to decompose, although it will produce smoke at 200 degrees Celsius, but according to research, this kind of gas toxicity is very low, It is not even as toxic as the smoke produced by general edible oil, and in the packaging process, it is impossible to reach such a temperature, so there is no need to worry about the food safety of PTFE coated multihead weigher.

Compared with ordinary multi-head weigher, PTFE-coated multi-head weigher increase the cost of PTFE coating, making the equipment more expensive. Different PTFE prices and performance are slightly different, and different multi-head weigher have different surface areas. In general, PTFE coating will Make the weigher about 10-20% more expensive. it’s totally worth it for sticky products.

Refer:
http://www.rjchase.com/ptfe_handbook.pdf
https://web.archive.org/web/20071014063923/http://socrates.berkeley.edu/~peattiea/research_main.html
https://web.archive.org/web/20100620052747/http://www.chemheritage.org/classroom/chemach/plastics/plunkett.html
https://www.commonchemistry.org/ChemicalDetail.aspx?ref=9002-84-0
https://webbook.nist.gov/cgi/cbook.cgi?ID=9002-84-0&Units=SI
https://patents.google.com/patent/US2230654A/en
Zapp JA, Limperos G, Brinker KC (26 April 1955). “Toxicity of pyrolysis products of ‘Teflon’ tetrafluoroethylene resin”. Proceedings of the American Industrial Hygiene Association Annual Meeting.

History

About 80% of the earth’s atmosphere is nitrogen. As early as 1772, Swedish chemist Carl Wilhelm Scheele understood the existence of a variety of substances in the air, of which what could not burn was then known as foul air, and the gas that could fuel combustion was called fire air. With the advancement of technology, the nature of air has gradually become clear, and its name has been determined by IUPAC. These discoveries and advancements have laid the foundation for the subsequent development of the packaging industry.

In 1821, French medical researcher Jacques Etienne Berard discovered that the shelf life of fruits was greatly extended under low oxygen conditions. Subsequently, the results of this research began to be used in the 1930s, and a storage method called (CAS) Controlled Atmosphere Storage —— by creating a storage room with a high CO2 environment to extend the shelf life began to emerge. In the 1970s, Mexico appeared to fill the packaging with gas to extend the shelf life. Later, they were called MAP (Modified Atmosphere Packaging). At first, they were only used for fresh food, and then various types of packaging began to develop rapidly. The filled gas mainly includes high oxygen, nitrogen, carbon dioxide, and other gases. Now, the additives approved by the EU include many such gases:

At the same time, for specific products, there will be a corresponding mixed inflation program to maximize the shelf life. So far, MAP has been very mature, and thousands of products have been perfectly delivered to consumers through MAP.

How does MAP protect foods

To understand why MAP can extend the shelf life, we must know why food deteriorates and why metal rusts.

Generally speaking, there are two reasons:

Decomposition

If the proteins of dead animals and plants are exposed to the air, they will be contaminated with microorganisms such as bacteria. These bacteria decompose organic matter into inorganic matter, which is part of nature’s cycle. However, this kind of decomposition will reduce the food. At the same time, the bacteria may produce some toxic substances in the process of decomposing organic matter, and even some bacteria are harmful to the human body. According to statistics, for this reason, about 1/3 of the food is lost every year.

We can take some methods-elimination, isolation, suppression.

In order to eliminate bacteria, we need to create a sterilization process that does not affect food but can kill microorganisms. Therefore, there are many additional steps in the food processing process, such as the famous Pasteurization, which kills microorganisms through temperature. At the same time, in order to isolate bacteria, the food processing process is strictly controlled, the factory requires aseptic processing, and personnel must be disinfected when entering and exiting. Packaging is also a part of isolating bacteria, but no matter how hard we try to isolate them, those bacteria that are invisible to the naked eye can always be attached to food from corners that we have not paid attention to. Therefore, in order to ensure safety, after the packaging is completed, we also need to suppress the reproduction and growth of bacteria as much as possible to extend the shelf life. So preservatives were invented. Preservatives can indeed inhibit the growth of bacteria. However, it does not only bring benefits. Many preservatives have not passed the health test, but are still used by many unscrupulous businesses. Even some additives approved by the food safety departments of various countries have problems such as the insignificant effects of extending the shelf life, high prices, and possibly changing the nature of food. It is in this environment that MAP was developed. Filling some inert gas into the packaging can greatly prevent bacteria from multiplying. At the same time, there is no need to worry about food health problems, and it is safe and reliable.

Oxidation

Oxidation may be harder to understand than Decomposition. According to the explanation of Wikipedia: Oxidation is a chemical reaction that can produce free radicals, thereby leading to chain reactions that may damage the cells of organisms. If you don’t understand it, it’s okay. We just need to understand that even if there are no bacteria messing up, the food exposed to the air will gradually deteriorate. As it should be, like antiseptic, Antioxidant has come out. Antioxidant certainly has similar problems, such as food health, price and so on. Fortunately, MAP can solve them, because most of the time food and metal will only have Oxidation with oxygen, so MAP can also perfectly solve the problem of Oxidation.

MAP vs Vacuum Packaging

In addition to MAP, there is also a similar packaging method, namely vacuum packaging, which uses similar principles and can also extend shelf life, each of which has its own advantages and disadvantages.

The advantages of MAP are:

The advantages of Vacuum Packaging are:

In addition to the above, MAP can also be used to improve product quality in some cases. For example, there are discussions about changing the proportion of mixed gas to make the meat look more delicious, but this lacks data support.

Applications of MAP

At first, MAP was only applied to some fresh food materials. Later, with the gradual development of the food processing industry and packaging industry, many refined food products also began to use this method to extend the shelf life. The main products include:

If you are interested in MAP or Vacuum Packaging, you can contact us for relevant packaging suggestions.

Refer:
https://www.sciencedirect.com/science/article/pii/B978008100596503376X?via%3Dihub
https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02008R1333-20200325
https://doi.org/10.22207/JPAM.12.3.39
https://en.wikipedia.org/wiki/Antioxidant

Green packaging is also called sustainable packaging, is defined as the packaging of goods in materials that are biodegradable and recyclable, while at the same time using packaging that is as efficient and energy-efficient as possible. Various countries have formulated many Green Package standards according to their national conditions.

How packaging materials pollute nature

Before we look at green packaging, we should first understand how traditional materials are polluting nature.

The most traditional and widespread packaging material is plastic, which is composed of organic polymers of high molecular mass. The main components are acrylics, polyesters, silicones, and polyurethanes, and various additives are also included.

It takes a lot of energy to make these materials in the first place, and it’s usually powered by fossil fuels like oil and coal, which alone results in the release of millions of tons of methane and carbon dioxide into the atmosphere every year. But that’s not over yet. The wastes and corpses of various organisms are processed by a type of organism called decomposers in nature. They decompose the wastes into basic substances in nature to complete the ecological cycle. This process is Call it to biodegrade. However, humans have created such indestructible materials that decomposers cannot decompose them, so will we live forever with our plastic waste? That’s not true. Although biodegrade doesn’t work on plastics, we can turn to our old friend from far away in the universe——the sun. When plastics are exposed to ultraviolet rays, the polymer chains of plastics begin to become fragile and eventually break, and after a long process, plastics may eventually shatter into tiny pieces! This is called photodegrade. However, this is only possible because it is so long, far longer than the time we use plastics. Even scientists cannot determine the exact time, but according to WWF’s The lifecycle of plastics, many plastic products take nearly 500 years to decompose.

Those plastics that are difficult to decompose, with their harmful substances, penetrate into the soil, water, and air, destroying the original environment. At the same time, because too much plastic is produced, plastics themselves are already having a serious impact on nature. Roland Geyer, Jenna R. Jambeck and Kara Lavender Law in their paper <production, use, and fate of all plastics ever made> estimate that we have produced 8.3 billion tons of plastic since 1950 and that plastic pellets will eventually harm us as human beings through the food chain.

Green packaging materials or alternative

From the point of view of environmental protection, those substances that will not damage the original natural environment on the earth, especially the water, soil and atmospheric environment are all possible. We can achieve this through the idea of ​​recyclability and biodegradability. There are the following:

Recycled and Reusable Materials

The feature of this type of product is that the same material can be used multiple times, and the packaging discarded by users can be recycled,  made into packaging for new products. This is the mainstream practice of many people because of its low cost and the characteristics of the packaging will not change much. However, there are also many problems here. For example, you may not guarantee the recycling of the packaging discarded by users. Many packaging are not completely green in themselves, but their recyclable characteristics make them green. Nobody knows where consumers will throw their packaging, or just a neighbor’s kid burned it while playing. But even so, even if your packaging can only be recycled once, it can reduce pollution by 50%, so why not do it.

Bioplastics or Plant-based Materials

Compared to Recycled and Reusable Materials, Bioplastics or Plant-based Materials is much more convenient. This kind of material extracted from organisms or plants can be naturally decomposed in nature. Is there anything more environmentally friendly than this? Them originally a member of nature! You do not need to do anything, just wait for the decomposer to decompose those materials. However, this type of packaging has a very big disadvantage. They require more complex processes to meet the needs of modern packaging, which makes their prices more expensive, and those marginally profitable items simply can’t afford them.

Other

Energy consumption in the production process is also one of the sources of pollution, and the use of renewable energy sources can also be effective in reducing pollution.

The waste generated in the production process will also have serious pollution. It is possible to reduce pollution by using more advanced and environmentally friendly production methods, or by collecting the waste and treating it harmlessly, or even reusing it are all viable means.

History

By the 1980s, the speed of Multihead weigher from Ishida had increased to 160-180/min, and they stepped into other fields, such as candy, meat, metal parts, rubber parts, etc. More importantly, not only did Multihead weigher help Ishida dominate the packaging market in Japan but also made it develop into an international enterprise. First of all, in 1978, the first Australian companies bought their products, By 1980, a U.S. company called Heat and Control Inc. signed a contract with Marketing contract, then president Ishida Ryuichl or Circle of Honor Award’s first non-American recipient. They once possessed 80% of the weighing packaging market, but with the progress of technology and development, when the Multihead weigher core technology is no longer a secret, Imitations from Asia come at a staggering price, and Japanese and American packaging-machine makers have come up with products as good as Ishida’s. The industry has grown by working closely with manufacturers and users, and now buyers of multihead weigher have a myriad of options.

Over the years, the Multihead weigher category has evolved for specific products, such as those with a smooth finish, a specially handled chute and a specific jitter frequency, and fragile items with shorter drop distances and cushioning pads. The weighing of mixed products can be achieved by group weighing, and in recent years spiral channels and Teflon coating solutions have been developed for handling sticky or wet products(Such as cheese). The multi-weight scale has so far dominated the market, becoming one of the few, perhaps the only, solid package weighing solutions available, and it’s still evolving.

Working Principle

Although Multihead Weigher has changed the packaging industry to some extent, its principle is not complicated. Its general principle has not changed much in the past 50 years, and it is mainly divided into feeding, combined weighing, and discharging

Loading

First need to package material through various ways into the known as dispersion table in the middle of the bump on the top of the cone, this part will be in accordance with the set frequency and amplitude of vibration, made with the vibrations of the material and the vibration of the kinetic energy to overcome the friction to the gravitational potential energy of material in lower edge of the slide, slide around the dispersion around the table of radial troughs, and dispersion table similar to the radial troughs will jitter, slide it further into a device called Hoppers, into which the material falls. The vibration of the radial troughs and dispersion table independent are independent of each other, each radial trough is equipped with a hopper respectively. Dispersion under the table and simple weighing module, when they tested the dispersion table of the less material, will send signals to the material added to the dispersion of the table. This process, the dispersion table the frequency and the amplitude of vibration influence of the landing speed and eventually blanking weight, this needs to be set according to the material surface friction, experienced engineers often can quickly find the right frequency and amplitude. With the exception of the use of radial towards, some special products may use Tim or Screw Systems to drive the material, with similar principles. Dispersion of other Multihead weigher table of ladder-type, high top and bottom of the ladder short, parallel hoppers are arranged on the bottom of the ladder.

Combined weighing

The material falling from the edge will enter Hoppers, and the material will stay in poll Hoppers above hoppers, and after the appointed time the vibration is stopped, there is a weighing hopper below, and if the weighing hoppers are empty, each weighing hoppers will drop the material into the lower weighing Hoppers, and each weighing hoppers has a weighing function. The central control system for Multihead Weigher combines all the weighed hopper data to select the Combination solution closest to the weight set by the user (which is why Multihead weigher is also called Combination weigher). It is not difficult to understand that the more hoppers, the more accurate and faster the weighing, so the multi-head scales will develop from the earliest 8 to as many as 20 or even 30. Some products and additional Booster Hoppers are used to store the materials that have been weighed.

In fact, this step is the main difference between most different Multihead weighers. The contents of each weigh X (X=1,2,3… N), and x is basically accord with normal distribution, and set it as n (mu, sigma) and the weigh hoppers independent each other, each time the random k when feeding hopper, then tick k mu is packaging accuracy index, however, modern Multihead weigher is master, calculation of the optimal feeding after so usually will be more close to the target weight, when feeding weigh hoppers subset of H, sigma squared package = VAR Σ ∈ x H (x). M. Salicru and J. J. Barreiro have published many papers on weighing accuracy, Keraita JN and Kim KH have done a lot of research work related to increasing the feeding speed, and there are also many products using such as Bi-criteria optimization model and Priority. These are highly specialized fields, which make even Multihead weighers of the same principle differ greatly in speed and precision. Of course, engineers play a large role, and reasonable parameter Settings can greatly increase accuracy. Perhaps we will have a special article later on the combinatorial algorithm and strategy model of feeding selection.

Feeding

The final process was very simple. The selected Hoppers drop materials into discharge chute and send to packaging or other downstream machines. After Hopper is emptied, the radial Troughs will be performed again, the materials are transported into Hoppers, then cyclic weighing is performed.

Through these processes, the final combined weight error is 1-2 orders of magnitude smaller than the direct weighing importance. These accurately weighed materials can be sent to packaging bags and finally sold on the shelves, becoming commodities in your hands and mine.

Refer:
MECHANICAL ENGINEERING HERITAGE NO.89 Multihead Weigher ACW-M-1
https://www.jsme.or.jp/kikaiisan/heritage_089_en.html
Salicrú, M., González, C. and Barreiro, J.J., Variability reduction with multiweighing proceedings
Barreiro, J.J., González, C. and Salicrú, M., Optimization of multiweighing packing proceeding
Keraita, J.N. and Kim, K.H., A study on the optimum scheme for determination of operation time of line feeders in automatic combination weighers, Journal of Mechanical Science and Technology
Ferguson Evans, The Rise of the Japanese Specialist Manufacturer: Leading Medium-Sized Enterprises