Rotational Moulding: The Process & Advantages

 Rotational moulding, also known as rotomoulding, is a plastics moulding technology which is ideal for making hollow articles. It is a casting technic but unlike most other plastics processes there is no pressure involved. Moulds for the process are relatively inexpensive as they do not have to withstand pressure and therefore relatively short production runs can be made very economically.

Rotomoulding is used to make a very diverse range of products. The process offers the product designer exceptional freedom as just about any shape can be produced. There is almost no limit to the size of mouldings and there are literally thousands of applications.

The ProcessThe concept of rotational moulding is very simple. A plastic material, normally in powder form is placed into a hollow mould, usually made from cast aluminium or fabricated from sheet steel. The mould is closed and rotated slowly on two axis. The mould is then heated in an oven whilst rotating and the polymer gradually melts and ‘lays-up’ on the inside of the mould. Once the polymer powder has fully melted the mould is moved to a cooling station and cooled usually with air and sometimes a fine mist of water. As the mould cools the part solidifies. When the material has finally cooled sufficiently to release away from the mould surface the process is stopped and the product is taken out of the mould (de-moulded).


    Whilst the concept of rotational moulding is extremely simple anyone who has ever been involved in the process will tell you that it is in fact extremely complicated. It is a casting process and there is normally no pressure involved which means that the material cannot be controlled in the same way as high pressure processes such as injection moulding. There are many variables that can affect production and the end product such as ambient temperature and humidity, type of mould, material specification and powder quality.


    Materials


    Today the industry is heavily dependent on Polyethylene (PE) and 97% of rotomoulded products are made from this material. Polyethylene is a versatile, easily mouldable and readily available polymer which has come to dominate the process. Rotomoulding is a casting technique in which powder is nearly always used rather than granules, meaning the material must be ground. Polyethylene is relatively easy to grind at ambient temperatures.


    The development of other polymers has been hindered by the fact that the process is relatively long and therefore aggressive on polymers, however there is some usage of PVC (usually in liquid plastisol form), Polypropylene and Polyamide (PA6, PA11 & PA12). Many of these non-Polyethylene materials are difficult to grind and most need to be made into powder using cryogenic grinding – that is freeze grinding, which is a more costly process. There is a welcome increase in R&D to expand the range of materials available to the industry.


    Uses And Advantages Of High-Quality Plastic Pulverizer Machine


    When deliberating on high-quality pulverizer    machines, take a look at the plastic pulverizer machine.


    The plastic pulverizer is a piece of magnificent equipment used in crushing plastic into small and tiny sizes.


    Former plastic pulverizers are highly difficult and complex and the results it produced are inaccurate sometimes.


    To solve this problem    customized powder pulverizer    machines    are introduced, and they generate colorful masterbatch.


    All thanks to the manufacturer of the high-quality pulverizer. With this machine, you have the chance to achieve standard quality and colorful powder used in the manufacturing and compounding of masterbatch.


    Also, the plastic pulverizer machines give the perfect and equal size of particles which ensures an adequate blending and mixing of additives.


    Furthermore, plastic compounds such as Polycarbonate (PC), Polyamide (PA), and Polyethylene terephthalate (PET) are processed in an ambient heat through this processor.


    Once this is ongoing, the downstream fan will transfer the end product into a cyclone from the disc mill.


    One notable thing is that this whole process is totally mechanical but the control cabinet will maintain and regulate all the activities.


    However, for advanced and latest    high-quality pulverizer    to smash your plastic materials, buy PVC pulverizer    from a reliable manufacturer.


    Obviously, this is the most recommended option for your best processing services.


    Materials That Can Be Ground Using Plastic Pulverizer Machine


    PVC pulverizer machine can be used to grind many items such as buckets, bottles, pipes, and jugs.        


    After grinding, these materials are converted into granules which are afterward ready to be remolded into different other products.


    A plastic granulator is normally large which allows it to grind much plastic at once.         


    More so, you can also buy PVC pulverizer    which is smaller in size for home use.


    High quality plastic pulverizer machine can be used to grind thermoplastic materials such as Low-density polyethylene (LDPE) and ethylene vinyl alcohol (EVA).


    Other materials include Polyvinyl Chloride (PVC), Polyester, cross-link, ABS, High-Density Polyethylene (HDPE), polyethylene terephthalate (PET), and Nylon.


    When you buy PVC pulverizer, you can also use it to pulverize film waste, sheets, and tubes of soft and hard, impact, and brittle resistant materials.


    High-quality pulverizer    is easy to clean and maintain and has an economic option. It doesn't consume power and it has a robust design.     In fact, time and effort are saved by its ease of operation.


    Why You Should Go for an Air Cooler Over an Air Conditioner?


    In the ongoing debate of air conditioners vs air coolers, we list down few important pointers that will offer a clear idea of why you should opt for an air cooler.


    But first things first, should you buy an air cooler?
A cooler can be used by everyone, especially people living around hot and dry weather. One can choose from a dessert cooler, a window cooler or even a personal cooler, depending on the requirements.


    Read on to know more about why to choose an    air cooler    over an air conditioner.


    Have you ever wondered about how an AC or an air cooler functions and how does it affect the quality of air in your home?


    An air conditioner circulates the internal air of the room over and over again, whereas an air cooler pulls fresh air from outside and then cools it down. Also, air cooler doesn’t make the air overly dry like an air conditioner. Because of the way it operates, an air cooler offers better quality of air for your room. So much so, that the air circulated from an air cooler is preferable for people with asthma or dust allergy.


    Economical Alternative


    When it comes to value for money, an air cooler definitely scores high over an AC. Even though both end up cooling the room, an AC can cost anything ranging from ?30,000 to ?60,000, whereas a cooler will be available from ?5000 to ?15,000. Also, apart from the initial cost of purchasing, even the operating cost of an air cooler is less than an AC. You can approximately expect 80% less electricity bill from a cooler as compared to an AC, making it economical in the long run.


    Going green is something that concerns all of us, and air coolers trumps the card here as well. Air conditioners use CFC (Chlorofluorocarbon) and HFC (hydro-chlorofluorocarbons) as their refrigerant, which is quite harmful to the environment. On the other hand, air coolers are eco-friendlier, since they use water as the refrigerant.


    Industrial Cooling Fans: Overview, Benefits, and Applications


    It is quite common to see various types of fans in industrial facilities. They are used to regularize the airflow to various structures or parts of the building. There are several types of industrial fans, which are categorized based on their designs, applications, and so on.    Industrial cooling fans    and industrial cooling blowers are two types of industrial fans used across the industrial facility for cooling purposes. Do you want to know how these fans differ from other types?


    This post gives an overview of industrial cooling fan, their beneficiary features, and industrial applications.


    What are Industrial Cooling Fans?


    Industrial fans are the mechanical devices that create fluid flow for industrial purposes. The industrial fans often considered as fluid displacers since the air or gas is displaced from one point to another due to the rotational motion of blades. The primary purpose of the industrial cooling fans is to blow cold air and drive hot air out of the environment. Therefore these industrial fans are also called industrial cooling blowers. However, cold air intake or hot air exhaust depends on the design and construction of the specific fan. Unlike other industrial fans, the cooling fans have large diameters, which help them produce large volumes of air and low pressures, as required in several environments. Regardless of the fan design, the fundamental components of industrial fan remain the same. They are discussed in detail in the next section.


    Fundamental Components of an Industrial Cooling Fan Assembly


    Industrial cooling fans comprise a motor, a rotor shaft, and the blades or impellers. These are the fundamental components of the assembly. Check out on the function of these fundamental components and other important features in a fan assembly.


   An electrical motor is the primary input source in an industrial cooling fan assembly. The motor can be AC or DC as per the design and performance requirements. The motor transfers’ electric power to the hub of the rotor shaft as the energy input.


    Rotor Shaft:The rotor shaft is connected to an electric motor with an intermediate hub. The hub transfers electrical energy to the rotor shaft. The shaft rotates on receiving this electrical energy. This all suggests the conversion of electrical energy into mechanical to get the desired output.

 Impellers/Blades: The blades or impellers are the components that cut through the surrounding air to form a fluid drag. The blades are mounted on the rotary shaft at a specific distance. The blades rotate to push or exhaust air drag. These blades can be designed in multiple shapes according to aerodynamic standards.

 Fan Casing:The fan casing is a metal casing that houses the whole assembly. The main purpose of fan casing is to protect the assembly from dust, external damage, as well as the environmental impact such as corrosion, moisture, dust, etc.


    Fan Mountings:The mountings are bearing on which the fans are fixed on. The industrial cooling fan assembly can be mounted by using a ball or sleeve bearings. The bearings are the foundation of the fan assembly therefore, the quality and function are very important.These components of the industrial fan assembly remain constant irrespective of the types of industrial cooling fans.

Wpc Vs. Spc: What You Need To Know About Water-Resistant Vinyl Plank Flooring

What Is Rigid Core Flooring?Rigid core flooring is the innovative vinyl flooring for    today's demanding consumers. Available in both plank and tile shapes, it's a luxury material that can stand up to a lot of abuse, including water.

To understand rigid core, you have to move beyond the vinyl flooring you're familiar with. Standard vinyl flooring is a fairly thin, flexible material that is glued down to the sub floor. Rigid core is stiffer, thicker and sturdier, which gives it some unique advantages. One of its most-hyped pluses is its ability to handle water, but that's not the only check in the “pro” column. It can also handle sub floor imperfections, offer excellent sound insulation and superior comfort underfoot.


    Here's where we get to the technical jargon: The assorted positives of vinyl plank flooring (or vinyl tile) depend on whether you go with a WPC or SPC construction.

How WPC and SPC Come into PlayLike engineered hardwood,    luxury vinyl plank flooring    is constructed from layers of material—typically four, though that can vary between manufacturers. Let's look at the different layers, starting with the surface:


    Layer #1 is the wear layer. It's clear, durable and scratch-resistant.


    Layer #2 is the vinyl layer, composed of multiple,    compressed layers of vinyl.        This layer facilitates the authentic embossing technology applied to the printed decorative film that lies between the wear layer and this vinyl layer.


    Layer #3 is the rigid core layer. It's made from either wood plastic composite (WPC)     or stone plastic composite, also referred to as a solid polymer core (SPC).


    Layer #4 is the base layer. This is the bottom of your plank or tile, and it's usually made from foam or cork.
Many WPC and SPC options also feature an attached pad (underlayment) that provides sound absorption and allows for under floor heating systems.


    What Is WPC?


    Wood plastic composite flooring, or WPC flooring, is a vinyl plank or vinyl tile flooring with a rigid core that's made from either recycled wood pulp and plastic or polymer composites that are    expanded with air.        It's sometimes called “wood polymer composite flooring.”     It is a light weight, low density construction that is warm and soft underfoot with greater comfort.


    What Is SPC?


    Stone plastic composite, solid polymer core, or SPC flooring, is a vinyl flooring material that has a rigid core made from powdered limestone, polyvinyl chloride and stabilizers. Sometimes, you might see it referred to as “stone polymer composite flooring.”     It is dense, dimensionally stable, quiet and strong.        Pure    from    Beauflor    are great options in this category and both include an attached pad.


    SPC and WPC – Key Differences to Know


    Similar to dryback luxury vinyl flooring (which is the traditional type of luxury vinyl that requires an adhesive to install), SPC and WPC flooring are comprised of multiple layers of backing that are fused together. However, unlike dryback flooring, both flooring options feature a rigid core and are a harder product all around.


    Because SPC’s core layer is comprised of limestone, it has a higher density in comparison to WPC, though is thinner overall. This makes it more durable compared to WPC. Its high density offers better resistance from scratches or dents from heavy items or furniture being placed on top of it and makes it less susceptible to expansion in cases of extreme temperature change.


    One important thing to note is that although SPC and WPC are often marketed as being waterproof, they are actually water resistant. Though neither product is entirely waterproof if submerged underwater, topical spills or moisture should not be an issue if properly cleaned in a reasonable amount of time.


    Applications


    Rigid core products including WPC and SPC were originally created for commercial markets because of their durability. However, homeowners have started using rigid core as well because of its ease of installation, design options and durability. It is important to note that some SPC and WPC products vary from commercial to light commercial use, so it is best to always consult your manufacturer to know which warranty applies.


    Another highlight for both SPC and WPC, aside from their easy-to-install click locking system, is that they do not require extensive subfloor prep prior to installation. Though installing over a flat surface is always a good practice to be in, floor imperfections like cracks or divots are more easily hidden with SPC or WPC flooring due to their rigid core composition.


    And, when it comes to comfort, WPC is generally more comfortable underfoot and less dense than SPC due to the foaming agent it is typically comprised of. Because of this, WPC is especially well suited for environments where employees or patrons are constantly on their feet.


    In addition to offering more cushion when walking, the foaming agent in WPC provides more sound absorption than SPC flooring does, although many manufacturers offer an acoustic backing that can be added to SPC. WPC or SPC with acoustic backing are ideal for settings where noise reduction is key such as classrooms or office spaces.


    What's    the Difference Between Lvt Vs. Lvp?


    LVT (Luxury Vinyl Tile) and LVP (Luxury Vinyl Plank) are two different types of luxury vinyl flooring. LVT is vinyl flooring designed in a tile shape, whereas LVP is vinyl flooring designed in planks to resemble traditional hardwood floor planks.


    Here are some more details on these two wonderful luxury vinyl flooring choices…


    What's Luxury Vinyl?


    Luxury vinyl is a specific type of vinyl flooring. Old-school vinyl flooring used to be offered in sheet form only, and therefore wasn't able to mimic the realistic natural materials that luxury vinyl floors now can. Modern LVT and LVP floors are now offered in countless patterns and colors, and designed so that they appear to look almost exactly like natural materials such as wood, stone, and tile. Some LVT and LVP flooring options are even textured to appear like these materials as well. Many LVT and LVP floors even have seams for grout, and the planks can come in narrow or wide styles, as can the tiles.


    Are LVT and LVP floors waterproof?


    Yes! Both LVT and LVP floors constructed from layers of plastic, so they're waterproof, making them an ideal flooring choice for any room in your house, especially kitchens, bathrooms, and basements. LVT and LVP floors are designed to withstand moisture, heavy foot traffic, and plenty of scratches and spills.


    What's VCT flooring then?


    VCT stands for Vinyl Composite or Vinyl Composition Tile flooring. Though VCT floors are also made with some vinyl in them, unlike LVT floors, they contain less plastic and more natural materials such as limestone. Because of this, VCT floors are more porous than LVT floors, and thus they are not as waterproof and require more maintenance.


    What about Engineered Vinyl flooring?


    Engineered Vinyl flooring, or Engineered Vinyl Plank (EVP), is a subset of LVPs. EVPs are simply even more durable than many LVP options, as they're built with the strongest high-density fiberboard core, and have a rigid stone-based core. EVPs are often considered the luxury vinyl planks on the market that most closely resemble real hardwood floors, but personal preference will often determine this for you!


    What Is The Most Durable Garage Floor Covering?
Whether you use your garage as a car parking area, laundry area, or home gym, you want a floor that sustains your uses. A durable garage floor is an asset because it saves costs on floor repairs. It also gives you the freedom to maximize garage usage. A floor that sustains high traffic,    resists damage    and offers easy cleaning is crucial. While most garage floor finishes are durable, not all may match your needs. With this list of garage floor coverings, you can find the perfect floor finish. The right floor covering transforms your boring garage into a modern, inviting space.

    Epoxy is one of the most durable garage coatings. You can lay it on your concrete subfloor to liven up your garage. It provides unique colorful hues, metallic and natural stone finishes. Once dry, the epoxy forms a hardened and thick coating. This layer protects your floors from scratches, dents, chemical spills and cracks. No matter what you drop on your garage floor, the epoxy will resist damage.


    The installation process may take 3-5 days or longer, depending on the floor size. You need to find alternative parking, but it's worth the wait. A professionally installed epoxy floor serves you for 5-10 years. However, it may last longer, depending on usage. For instance, commercial garage flooring wears faster than a private garage at home.


    An epoxy floor expert prepares your floor before applying at least three coats. The preparation and layers provide the best durability. The primer is the first layer, followed by the base coat and, finally, the topcoat. As you can imagine, the finished coat is thick and hard enough to resist impact and chemicals. The base coat lets you play around with colors and designs. Lastly, the final coat gives you a smooth glossy finish.


    Epoxy is also great for commercial garage flooring because it resists wear. You can park cars and walk over the years. With a non-slip additive, the floors resist slipping to prevent injuries. The thick coating also seals cracks and imperfections. You can enjoy a durable and smooth floor finish


    Purpose of Skirting


    Skirting in some projects is an aspect of beautification and for some, it’s a method to hide the unwanted features in the interior walls. These skirting boards were known as mop boards as they protect the wall from water when the floor was mopped.     Different purposes for which skirting are installed are mentioned below:

 Hide exposed electrical wiring:    Skirting can be used to cover up the exposed electrical wires and connection that cannot be removed. Hiding these wiring under the skirting board is found more economical and practical compared to hiding under the ceiling board.Cover the gap between the walls and floors:    Some construction flops may result in unwanted gaps between the wall and the floor. Redoing such works is time-consuming and costly. One alternative is to install skirting so that the poor work is covered and cleared economically.
        
Avoids marks from furniture:    The skirting board installed has a projection that always keeps a gap between the nearby furniture and the interior wall. This way rubbing and scratching from the furniture are avoided letting the wall free of scratches. Improve Interior:    A matched and good colored skirting gives the room a finished and cleaner look. Skirting throws a professional touch to the room it is installed.

To many people, Oil Filters are a generic product. Price is the only factor considered when they choose a filter. They do look pretty much the same on the outside, but what’s inside can make a big difference.

Filter manufacturers use a variety of different filter media to keep the oil clean. Resin impregnated paper filter media has been around forever and uses cellulose fibers to trap contaminants. A high-quality paper filter element with evenly spaced pleating can provide good filtering efficiency. The typical OEM or standard replacement oil filter with cellulose fiber media will trap about 97.5 percent of most particles that are 15 to 40 microns in size or larger.
Some filters use a combination of cellulose fibers and non-woven plastic or synthetic fibers to improve filtering efficiency. The different materials may be combined together or used in a multi-layer filter element. These types of Car Oil Filters can have filtering efficiencies as high as 99.5 percent and trap up to 40 percent more contaminants with particle sizes as small as 3 to 5 microns.

One of the biggest challenges that all oil filters have to cope with today is longer service life. Though 3,000-mile oil changes are still recommended for severe service driving, OEM-recommended oil change intervals for “normal” driving today can range from 5,000 to 7,500 miles, or up to 10,000 miles or more. Many vehicles don’t even have a recommended service interval and rely instead on a “Service Reminder Light” to estimate when the oil needs to be changed. On some vehicles, the light may not come on for 12,000 to 15,000 miles depending on driving conditions! That’s a long time for an Engine Oil Filter to remain in service.
According to some sources, some of the cheapest no-name generic oil filters from China are not even lasting 3,000 miles before they plug up and go into bypass mode. All oil filters have a bypass valve that is designed to open if the filter becomes clogged. The bypass valve prevents a dangerous loss of oil pressure in such situations, but also allows dirty unfiltered oil to circulate through the engine. It’s the same as running with no oil filter at all!

Worse yet, if the Air Filter media breaks apart or fails, chunks of debris can enter oil passages and cause all kinds of problems inside the engine. Such debris can restrict or block critical oil passages causing a loss of oil pressure or engine damage.
The best advice you can give your filter customers is to buy the best oil filter that is listed for their engine — especially if they are not changing their oil for 7,500 miles or more. Many premium filters can go 10,000 miles or more. In any event, extended oil service intervals of 10,000 miles or more require both synthetic motor oil and a premium quality filter.

Car Air Filters are a must if you want your beloved car to run like a Champion. When one of your filters gets clogged, it can cause problems and affect performance. You may notice a loss of power, dirty smoke, oil light or even engine failure. In this article, we’ll look at the different filters in your car and why you need to consider car filter replacing regularly.

Get to know the filters in your car
Every car has four main filters: the cabin filter, oil filter, fuel filter and air filter. The function of all these filters is to enable flows and catch impurities: the dust and contaminants in the air, the impurities in the fuel or the dirt in the motor oil. If your Engine Air Filters are not replaced in time, they won't work properly and in the end, it could cause an impact on the mechanics. By replacing your filters, your car will be more efficient.

What is a cabin filter?
The Cabin Filter cleans the air that comes into the interior of your car through heating and air conditioning. It filters out dust, pollen and other airborne particles. If you’ve got a carbon activated cabin filter it also captures exhaust gasses and odours. Having clean air in your car is particularly important if you have any allergies or respiratory problems.

What’s a cabin air filter?
You are probably aware that your vehicle’s engine has an air filter, but did you know that your car’s HVAC (heating ventilation and air conditioning) system may also have one? Commonly called a cabin air filter, it performs the same duties for your HVAC system as the engine air filter does for your car’s engine.
The cabin air filter is a small pleated filter made of multi-fiber paper cotton or other engineered material. Before entering the passenger compartment, outside air is directed through this filter to trap the contaminants inside the filter and prevent them from entering the inside of your vehicle.

Guten morgen alle,

sagt mal, was tragt ihr eigentlich so im Büro, mögt ihr es mehr sportlich oder 
eher "Business-Like"?

Hallo alle,

was finde ihr besser, wenn man vor dem Training oder eher nach dem Training isst?

Guten morgen alle,

ich habe nun kürzlich mal gelesen, dass man schon immer mal wieder
eine Munddusche machen sollte, wie oft ist aber eigentlich genug?

Guten morgen Community,

darf ich mal bei euch fragen, wer von euch schon mal eine Drohne geflogen ist,
ist sowas eigentlich schwer und muss man da sich direkt eine teure Drohne kaufen?

Hallo zusammen,

kennt ihr jemanden, der mir bei der Kontaktaufnahme mit einem toten Haustier helfen kann? Können Sie jemanden dafür empfehlen?

Hallo zusammen,

nicht alle Hausbewohner halten sich im Winter an die Schneeräumpflicht, aber mich bei dem Vermieter ein paar Mal gemeldet und alle sind einverstanden, jemanden zu beauftragen, den Schnee und das Eis zu beseitigen. Um alles rechtzeitig zu machen, würde ich mich über alles informieren. Kennt ihr einen Winterdienst?

LG

Hallo
Hatte jemand von euch mal Probleme mit Schimmel in der Wohnung, was habt ihr gemacht? Kann ein Entfeuchter helfen? Wer löst solche Probleme überhaupt? An wen kann ich mich wenden. Bitte hilft mir, ich weiß nicht, was ich machen soll.
Liebe Grüße