Plastic Extrusions – Overcoming The Rest Of The Business

Plastic Extrusions in Industry

This is the process of converting raw material plastic often called resin into various forms of finished products. The plastic extrusion process is usually done in high volume and is a continuous process which depending on the targeted end product ,can produce products such as plastic pipes, plastic rails, polythene sheets, plastic insulation material and even plastic containers. This process takes place without changing the inherent properties of the plastic material. The plastic extrusion process has become very important in today’s manufacturing as well as environmental management because it has enabled the substitution of expensive metallic products with plastics such as tanks, and also enabled the recycling of plastics thereby reducing plastic accumulation in the environment.

Process Related to Plastic Extrusion

• Sourcing of raw material. Raw material for the plastic extrusion process is supplied in the form of resins called pellets which are made up of polycarbonate material. These pellets could be derived from unused plastic material or from recycled plastic. In the process of manufacture of resin pellets, additives may be added to improve their color and even their structural qualities.

• The extrusion process. It involves feeding the pellets or resins by gravity to a hoper and into the extruder. This is where additives are added. Due to the conical shape of the hoper the material is directed to the other end by gravity where it meets the rotating screw. This directs the beads forward into a heated barrel. The barrel has three heating stages to allow gradual heating of the beads to up to 200 degrees to a set temperature depending on the material being manufactured. Gradual heating also avoids altering the structure of the polymer being used in production. The plastic in molten state passes through a screen removing impurities, to a breaker plate which converts the rotating motion of particles to longitudinal motion. From this stage the particles enter what is called a die and this is where the shape or the design of the final product is obtained from. Any shape can be obtained and it is important to maintain a continuous profile. The final stage now is cooling which involves pulling the unfinished product through a cold water bath.

Tolerances in plastic extrusion

This is the range given or that should be observed during the plastic extrusion process. This includes the length, width and even the thickness of the final product required. There is great variability in the tolerances of the extrusion processes especially due materials used, the cooling rate and extrusion process used. Faster cooling materials have stricter tolerances. The challenge of tolerances can be overcome through more sophisticated calibration and minimizing the pockets of the final product (slower cooling in pockets).The effectiveness of the cooling process directly affects the tolerance.

Forms of plastic extrusions

The plastic extrusion process comes in various forms such as the dies extrusion whereby the final product take the shape of a mould or die; Sizing products whereby the final product takes the shape of the bands situated after the die; sheet extrusion where by cooling is done by passing the product through cooling wheels to achieve sheets of plastic and tubes extrusion whereby when resin is at the die point, it is forced through tubes to give tube forms on cooling. Polythene bags are also made through this procedure. For More Information Visit - http://www.oceanextrusions.com/profile.html

Plastic extrusion processes are a great innovation in today’s economy as the use of plastics is increasing day by day. This is more so because plastics are replacing even metal and wood in industry.


This article has been written & posted by Mr. Mrunal Ramanuj.

Different Forms of Plastic Extrusion Machinery used for Blown Film Production

Plastic Extrusion Machinery for Blown Film Production

Plastic extrusion is a process whereby plastics are melted and joined to form a continuous profile. The extrusion machinery produces pipes, window frames, weather stripping, plastic films and wire insulation among others. In the plastic extrusion process raw thermoplastic material is fed into the extruder’s barrel through the mounted hopper.

This process is in a way similar to the plastic injection molding in terms of extrusion technology. The material that is fed into the barrel moves by gravity and reaches the rotating screw which forces the plastics into the barrel which has been heated to the required temperature. The plastic beads are the melted by the barrel in a gradual manner under controlled temperature. Plastic, which is molten gets out of the plastic extruder screw and goes through a screen pack which eliminates contaminants, and into the plastic extruder die which produces the final results. After these the end product is cooled using a water bath. Plastic extruders are mostly used in preparing recycled plastic wastes and materials after they are cleaned, sorted and chopped into resin beads.

The Blow Film Extrusion

The blow film line is mostly applicable for general plastics and can give various ranges of or forms of film extrusions. The blow film line is designed in an upright or horizontal manner to cater for upward, downward and horizontal extrusion. Blow film extrusion can be used to make single large films, two smaller films or even tubes that can be transformed into bags.

The blow film extrusion process is made of four main stages: the polymer in form of pellets are melted together forming a viscous fluid which is continuous. In the molten state the material is forced through an annular die. Injection of air is done midway the die causing the melted extrusion to form a bubble which is uniform in thickness. This is followed by pulling upwards the bubble from the die and the film cooled from inside to give the bubble uniform diameter. The bubble is then passed through a roller in the blow film line and gets flattened making two flat films. The multilayer blow film line is suitable for food packaging and industrial products, and agricultural and technical applications.

The Future Market for Blown Film Extrusion Machine

There has been a constant growth in the manufacture of high quality plastic extrusion machines with new designs been proposed especially for the flexible packaging industries. Market demand for plastic extrusion machinery is consistently on the increase meaning that in the future it is expected that plastic extrusion machines will be made with more sophisticated features including incorporation of more layers in composite plastics. To Know more about Plastic Extrusion Machinery, visit – http://www.oceanextrusions.com/

The multilayered structures provide more value and growth in the industry. Marketing demands in the recent past has been increasing especially in the food processing and packaging industry. Future markets will embrace more of the possible nine layered blow films which will produce even more properties such as flavor and aroma preservation, sunlight resistance, excellent barrier effect and good sealing properties. Increased extrusion machinery layers are composed an organized and complex blown film plant which must be maintained frequently.

This article has been taken from Source: - http://blog.oceanextrusions.com/different-forms-of-plastic-extrusion-machinery-used-for-blown-film-production/

All You Need To Know About Adhesive Lamination

When looking for an ideal adhesive lamination machine, several factors must be considered. Among them is high quality bond strength, good wet tack, can be used for wood lamination, is fast drying producing no wrinkles, bonds easily and many others. A good quality machine for industrial use is one that is an all-purpose lamination or coating machine with perfect functionality.

What is adhesive lamination and how does it work?

Adhesive lamination is a finishing process where you seal off with film. It can be done with a variety of finishes sometimes with color enhancement but the main goal is to enhance durability or a desired appearance as well as comfort. The adhesive coating plant works by different techniques depending on the material. Different coating plants are able to perform hot melt adhesive bonding, an application that is not prone to effects of moisture, has high adhesion capabilities and is good on short duration outdoor use materials. This approach also allows for instant lamination, has no need for moisture and upon cooling, the material is ready for immediate use. Other machines are able to coat circular woven fabrics, producing multiple layers of lamination. Spray coating is also another lamination technique commonly used on non-woven materials. A powder spray gun is used and is able to penetrate well in to the surface of the material. Some of these machines can hold more than one spay gun, thus can be of great advantage and can meet your high industrial demands. Lamination adhesives used can be water based or solvent based. Dry adhesives are appropriate for use in fast machines. Water based ones are cheaper and can be used for lamination as well as adhesive films. Solvent based ones on the other hand are best suited for outdoor use and offer long term durability since they can confer UV protection. They also work well with both lamination and adhesive films and have high tack qualities. Spray lamination typically works best with water-based or polyurethane adhesives. The plant usually has different units, such as the lamination unit, duckling system, sandwitch unwinder and the surface unwinder.  Click here to know more about Adhesive Lamination.

What are the applications of adhesive lamination for different industries

The industrial uses of adhesive lamination plants are varied, ranging from coating of;

• Paper
• Polyester film
• Cotton fabrics
• Jute
• Plastic
• Aluminum foil
• Woven sacks
• Non-woven fabrics
How do you select the best quality adhesive lamination machine for your industrial needs

hen choosing an adhesive lamination device, focus on an energy efficient, fast and high quality machine. Speed is necessary to boost your maximum production capacity per hour which is normally quantified in kg/hr. It must have smooth feed capabilities which will ensure that the end product after lamination is wrinkle-free. You must certify that the device can deliver the appropriate coating thickness range as per the material you are working with. The machine should be compatible with an adhesive that is not toxic and does not gas.

This article has been taken from Source: - http://blog.oceanextrusions.com/all-you-need-to-know-about-adhesive-lamination/

Rotogravure Printing Machine – Best Extrusion Machinery for Packaging & Printing Industry

The rotogravure is a form printing process referred to as intaglio printing process .This process involves engraving an image into an image carrier. The process uses rotary printing press where the image to be printed is engraved onto a cylinder. This process is used for commercial printing of magazines, cardboards aluminum, foil paper and also in product packaging.

From the above definition of rotogravure printing, we can define the rotogravure printing machine as the machine used in the printing process described above.

The modern machine uses a printing cylinder with tiny cells that have been engraved on it. The cells have the ability to retain ink, the pattern and the size that finally reflect the final image of the product.

High speed rotogravure printing machine: This is a fast speed kind of printing machine. The bigger number of rotogravure machines print rolls as opposed to sheets of paper. The machine is the fastest in speed and also the widest in the printing industry. For the maximum level of efficiency, this machine operate at high speeds producing very big diameters and wide rolls.

Applications of Rotogravure Printing Machine:

The roto printing machine is popular and mostly used in the fine arts and photography reproduction sectors because of its high density range in printing.

The printing process is also commonly used in food manufacturing and the packaging sectors. The gravure printing machine can print a wide range of substrates some of which involve polyester, polythene and BOPP among others. The rotogravure machine is most popular in this sector because of its ability to print well on thin films such as nylon and polyester.

The printing process is also applied in manufacture of wall covers and transfer printing. The process has further applications in the security printing, the tobacco sector and generally used the industrial sector.

Important features of the machine

· The rotogravure printing machine is characterized by a single printing unit for each color mostly Cyan, Magenta, Yellow, and Key which is the common printing reference of the color black. The number of units however mainly depends on the color you wish for the final image.

· High density range: the rotogravure printing machine is capable of transferring much more ink to the paper than the typical printing processes. This feature has made the machine popular in fine art, and photography reproduction

· The rotogravure printing machine allowed the ability to transfer ink consistently over a big range of densities at high speeds. This makes it suitable for applications that need high quality images, for example packaging, publishing and decorative printing.

· Long service life: The machine can print cylinders that are long lasting. They last even through large volume runs without the risk of them getting worn out.

· Another characteristic feature of the machine is its low per unit costs running especially in cases with high volume production.

· Good heat conduction.

The sectors where the machine is applicable

The printing machine is used in the following sectors

· In printing magazines that are long run and exceed over a million copies.

· The mail order catalogs also use this printing machine.

· Packaging for consumers

· In furniture making where quality and consistence is privy the printing machine is used to print wallpapers and laminates.

· Newspaper adds inserts, also frequently use this printing machine.

Click here to know more about Rotogravure Printing Machine.

The rotogravure printing machine is well designed to produce high quality images. The cells in the cylinder that allow consistent flow of ink and the engraving of the image on the cylinder all contribute to the high quality of the final images produced by this machine. The printing technique used by the machine is used in the manufacturing and the industrial sectors on large scale. It is therefore among the best printing machines that can be used for high volume production of quality products and images..

This article has been taken from Source: http://blog.oceanextrusions.com/rotogravure-printing-machine-best-extrusion-machinery-for-packaging-printing-industry/