There have been various positive signs for the growing economy. Plastic solutions are among the materials that are used in a large spectrum of industries and applications. When the demands for these products increase it is an indicator that other industries may also have increasing demands. Plastic solutions are more widely accepted as a viable and trustworthy component compared to their counterparts such as metal or wood. There are numerous benefits when utilizing plastic products. Plastic extrusion products have been proven as a vital material for the medical and clean room industries. These industries require sterility and the surface of plastic items are ideal for maintaining high levels of cleanliness. The uniform molecule structure is also a significant advantage. The medical industry, for example, benefits from this structure because many medical applications require tubing and through the plastic extrusion process manufacturers can achieved the desired specifications of those applications.
To meet the higher demands many manufacturers have been upgrading facilities in recent months which allows for faster and larger volumes of plastic extrusions but also more accuracy when cutting the plastic items. Sophisticated products are equipped with more intricate parts so manufacturers must have the capabilities to adhere to exact specifications even down to the smallest measurements. These newer processes have very interesting attributes and even though the products are being manufactured at a faster pace the integrity of the structures are not being compromised. Manufacturers will work with customers to create affordable solutions that adhere to sterility and dimension requirements.
Plastic extrusions are plastic shapes produced by forcing molten plastic through a die. Plastic extrusion is a continuous process that produces long plastic profiles; plastic strips, plastic channels, plastic trim and other basic plastic shapes are all produced by plastic extruders. Plastic extrusions play an important roll across industry, commerce and in consumer markets.
Automotive manufacturers employ extruded plastics as engine components and as decorative and functional trim on auto exteriors. PVC extrusions, particularly PVC tubes, are used extensively in plumbing systems and in wastewater treatment operations. Chemical processing operations also make use of extruded plastic tubing, and because different plastics feature different qualities of reactivity when exposed to chemicals, plastic materials are chosen for their applications based on such qualities. Acrylic extrusions, for example, are characterized by their optical clarity and durability. They are, for these reasons, often well suited to use as tubing in chemical processing, because their contents can be easily visible when inspected by workers. Some unique applications call for an extrusion that features the qualities of more than one material. In these cases, coextrusion can be used to mix two plastics together, allowing for the qualities of two plastic materials to be present in one product.
The term polymer extrusion is sometimes used interchangeably with plastic extrusion. This is not incorrect, though it is not the most precise way to describe the process. Technically, a polymer is a large molecule made up of many similar monomers, which are small molecules. Biopolymers like proteins and nucleic acids are essential for life. These are not the kinds of polymers to which the words "polymer extrusion" refer. When the words "polymer" and "extrusion" are paired together, they refer only to plastics and elastomers (natural rubber is an example of an elastomer). In the case of plastic extrusion, a very long list of plastic materials is at the disposal of companies that provide plastic fabrication services. High density polyethylene (HDPE), low density polyethylene (LDPE), PETG, PVC, butyrate, vinyl, polypropylene, and polystyrene are just a few of the most commonly extruded thermoplastics. A thermoplastic is a plastic material that, when exposed to sufficient heat, becomes plasticized. A plasticized thermoplastic can be shaped into useful products and retain the shape once cooled. Thermoplastics are highly valued for this quality, and they are also valued because they can be recycled at the end of their lifespans and reshaped by the same process.
The plastic extrusion process is very standardized, and there are few deviations between extrusion operations in terms of the basic principles of extrusion. Operating temperatures and output speeds may vary depending on the properties of the plastic material, but plastic extrusion processes resemble each other very closely aside from these differences. The extrusion process begins with a collection of raw plastic materials in a hopper suspended above a conveyance channel. When a panel at the bottom of the hopper is removed or retracts, gravity directs the plastic into the channel. Inside the channel is a long shearing screw that forces the plastic down the channel as it turns. The friction caused by the turning of the screw causes the plastic to become molten. Some extruders feature supplementing electrical heating elements to aid in the melting of the plastic. By the time the plastic reaches the end of the channel, it is ready to be shaped. At the end of the channel is a die, which is a specially-designed tool used to form raw materials into usable products. In the case of plastic extrusion, a die is a metal plate cut with a hole through which the plastic is forced.
When the molten plastic reaches the die, it is forced through, taking its shape as a result. The plastic emerges on the other side of the die as newly extruded plastic material. The plastic is quickly cooled, which causes it to harden and keep its shape. The extrusion can then be cut and prepared for shipment or sent for additional processing like labeling, painting, anti-static treating or other surface treatment. The shape of an extrusion die determines the shape of the extrusion. Every die is different; they are specially designed to accommodate individual processes. The simplest possible die designs are nothing more than simple shapes. A circle-shaped die would produce a plastic rod, while a square-shaped die would produce a continuous plastic square. Extrusions like pipes require dies fitted with special pins that allow hollow places to form. Textured plastic sheets like floor mats can also sometimes be produced by extruders. Plastic sheet dies would be flat with grooves to create the texture. The coextrusion process, in which two or more plastic materials are combined in a single extrusion, features one die connected to a forked conveyance channel into which the different materials are directed and mixed together. The number of possible extruded plastic shapes is limited only by the imaginations of their designers.
Plastic Extrusions - Creative Extrusion & Technologies, Inc.
Plastic Extrusions Manufacturers - Creative Extrusion & Technologies, Inc.
Plastic Extrusions Manufacturers - Polytec Plastics, Inc.
Plastic Extrusions Manufacturers - SFR Industries Inc.
Plastic Extrusions - SFR Industries Inc.
Plastic Extrusions - Preferred Plastics, Inc.
Plastic Extrusion Terms
- The resistivity of molten plastic material to forward flow.
- The part of the plastic extruders encasing the screw or plunger.
- The sleeve forming the inner surface of the plastic extrusions barrel.
- The plastic extrusions process of pressing or smoothing material between rollers.
- Sometimes referred to as sidings it is extruded PVC-U boards that are used as outdoor weather-resistant fade panels.
- Any plastic material prepared for subsequent manufacturing processes, specifically plastic extrusions, molding or calendering.
- The transition section of a screw channel in which a reduction in the screw channel volume occurs.
- A tank typically containing water through which plastic extrusions are constantly passed for cooling.
- The technique of cross-linking a plastics material.
- The section of two-stage plastic extruders in which an increase in screw channel volume occurs.
- The component on plastics extruders affixed to the plastic extruder's head through which the melt is pushed to form the desired profile.
- In moulds, the main support for the punch or mould cavity.
- A free flowing blend of compound or resin and other ingredients as prepared for an additional manufacturing operation specifically for plastic extrusions or molding.
- The product or result of the plastic extrusions process. An extrudate is a product or material forced through a shaping orifice as a continuous body.
- The minimal inner diameter of the plastic extruders barrel
- A coating technique in which molten plastic feeds directly from plastic extruder dies into a nip-roll assembly combined with the substrate.
- Also called a caterpillar, it is an apparatus used for the continous removal of extrudate from the die.
- The unique process of aging a thermoplastic or thermoset product and examining the percentage of retained physical and chemical properties after exposure to heat for a prolonged period of time.
- Any plastic extrusions material heated to a plastic condition.
- A term that refers to the strength of molten plastic.
- The element of tubing tie that shapes the outer surface of a tube.
- Resins or mixtures of resins with compounding additives in the shape of similar-sized tablets and granules that have been extruded or chopped into short segments to prepare them for molding or extrusion operations.
- A barrel with a temperature control, wherein a plunger pushes material in a melted state to the die.
- Any of several physically similar polymerized synthetics or chemically altered natural resins, such as thermoplastic materials (polyvinyl, polystyrene, polyethylene) or thermosetting materials (epoxies, polyesters, silicones used with fillers, stabilizers, pigments).
- A helically grooved rotating element inside the barrel of screw plastic extruders. The main purpose of a screw is to melt and feed raw material from the feeder to the die, but it also homogenizes, compresses and pressurizes the material.
- A machine comprised of a barrel with a temperature control. It houses one or more rotating screws, which pass plastic materials from the feed aperture and move them in the form of melt under pressure through a die.
- An apparatus for reeling extruded plastics material.
- A term that refers to the family of materials that can be melted only once during the original processing and cannot be reprocessed after the original part is made.
- Any material, such as polyethylene, Santoprene and ABS, that can be remelted and reprocessed without considerable loss of properties or scrap loss.
- An apparatus at the discharge stage of the screw for finishing homogenizing and blending of the melt.
- An extruded PVC-U channel used to contain and protect pipes or cables.
- A procedure utilizing a sizing die with a vacuum applied to the outer surface of the extrudate.
- A generic term for PVC, it is one of various compounds of ethylene that are polymerized to form resins and plastics (e.g. polyvinyl or polyethylene plastics).