There are five important process parameters to be considered before extrusion process: Melting temperature of plastic Speed of the screw Extrusion pressure required Types of die used Cooling medium

Plastic material in the form of pellets or granules is gravity fed from a top mounted hopper into the barrel. Additives such as colorants and ultraviolet inhibitors (liquid or pellet form) can be mixed in the hopper. The plastic material enters through the feed throat and comes into contact with the rotating screw. The rotating screw pushes the plastic beads forward into the barrel. The barrel is ...

Since the early 1960s when plastic film was first used to cover wood frame greenhouses, many improvements have been made. Most plastic film is manufactured as a coextrusion of three layers with different polymers and additives. Each layer contributes to the quality of the film and enhances its performance.Film lifeThe life of polyethylene film is limited due to degradation processes induced by sun...

Because of lower pressure, the mold costs in extrusion blow molding are lower as compared to injection molding and the machinery costs are low as well. Also, it’s easy to mold external threads. Making open-ended parts that are large can be done by splitting open a closed molding.

Polystyrene is the most general polymer used in sheet extrusion. It is major plastic material for the thermoformed packaging, and it gives competition to ABS & PP in the technical markets.The end use applications of the sheet / film extrusion include margarine, tubs and pots for yogurt and desserts.In the liquid packaging industry (wine boxes, juice cartons, etc.), the base if the process of plast...

Sheet / Film Extrusion is the process which is used for the products like plastic sheets or films. During the extrusion of these plastic materials, the required cooling is achieved by the action of pulling which is done through a specific set of cooling rolls that are generally three or four in number. These cooling rolls are also called calender or “chill” rolls. Extremely fast running speed deve...

What is PE？ PE, or Polyethylene, is a chemically resistant thermoplastic that can be very durable. Polyethylene plastic comes in a low density form and a high density form.

What Is Waste Plastics Crushing？ In waste plastics recycling process, waste plastics crushing is one of the most important processes, the volume of waste plastic is reduced, which is convenient for subsequent processing. The equipment mainly includes the cutting machine...

What is plastic film？ Plastic film is a thin continuous polymeric material. Thicker plastic material is often called a “sheet”. These thin plastic membranes are used to separate areas or volumes, to hold items, to act as barriers, or as printable surfaces.Plastic films ...

How does PVC help to conserve natural resources and combat climate change? Because PVC is intrinsically a low-carbon material which consumes less primary energy than many other materials and is easy to recycle. Also, most PVC products are very long lasting and require a...

How do you clean plastic? To clean plastic, wipe it with a detergent and water mixture, and spray the plastic with kitchen cleaner. Scrub off dirt with a sponge or nylon brush, and rinse the plastic. Dry the plastic with a soft cloth, and bu...

How does PVC contribute to a safer world There are many reasons why PVC and safety are inseparable. Due to unsurpassed technical properties, PVC is the most used material for life-saving, disposable, medical devices. For instance, medical tubing of PVC does not kink or ...

How does extrusion molding work? Extrusion molding is one of the simplest molding techniques. It is popular for creating pipes, I-beams, optic fiber cables and even foods like candy canes and gum. A variety of materials from plastic to hard candy syrups can be molded wi...

PVC extrusions in everyday use. Versatility and cost effectiveness makes PVC the most important polymer in the building and construction sector with approximately 75 per cent of all PVC manufactured being used in building materials. PVC window profiles, PVC cladding, PV...

What are some ways to measure plastic film thickness? The most accurate form of measuring plastic film thickness in common industrial use is by using one of a range of infrared spectroscopy methods on a sample of the film. These include meas...

Who invented plastic? The inventor of plastic was Alexander Parkes, who demonstrated his invention to the public at the Great International Exhibition in London in 1862. The material was initially called Parkesine and was created from cellulose. The material could be he...

Why use PVC? Simply because PVC products make life safer, bring comfort and joy, and help conserve natural resources and combat climate change. And due to an excellent cost-performance ratio, PVC allows people of all income levels access to ...

Why not make pvc bio-degradable so that it can rot away？ PVC is mainly used in medium or long-life applications, for which its ability to resist natural degradation is a significant advantage.When used in packaging, PVC is often chosen for its barrier performance and he...

What's PP？ Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications including packaging and labeling, textiles (e.g., ropes, thermal underwear and carpets), stationery, plastic parts and reusable containers of various types, la...

What's the sheet/film extrusion？ Sheet/film extrusion is used to extrude plastic sheets or films that are too thick to be blown. There are two types of dies used: T-shaped and coat hanger. The purpose of these dies is to reorient and guide the flow of polymer melt from ...

Aren't alternatives to PVC less expensive？ When considering the cost of PVC products and alternatives it is important to not only consider the sales price but also to consider any direct and indirect costs throughout the product life and at the end of life when the prod...

Why is PVC still used as a packaging material? PVC was one of the first polymers used in food packaging applications that replaced many traditional materials such as glass as well as various forms of card and paper. Some of the key reasons for its success compared to tr...

What is plastics extrusion？ Plastics extrusion is a high-volume manufacturing process in which raw plastic is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, weatherstripping, fencing, deck railings, window frames, plastic film...

What's PC? PC (Polycarbonate) is a high performance, sustainable and eco-efficient material used in a large variety of everyday applications. It has a unique combination of properties, offering clarity, durability, safety, versatility, as well as heat and shatter resist...

What is Extrusion？ Extrusion, from the Latin past participle extrudere meaning “to thrust out,” refers both to the process in which material is forced through a die or series of dies in order to shape it as well as to the product of that operation. The process is used i...

Specialty Plastic Extrusion Processes Many applications call for specialized extrusion processes to obtain adequate results or speed up the production process. Common specialty extrusion processes include:Blown film extrusion: Used to fabricate plastic film products suc...

Since the heating rate, feed rate, and other integral extrusion factors are directly dependent on the only moving part in the plastic extruder—the screw—carefully consideration of the size and design of this component is necessary. Calculation of screw diameter and length is based on the melting rate, size of the resin, type of raw plastic, and amount of pressure required maintaining uniformity. F...

Maintaining the correct temperature level and melting rate of the resin is an important consideration when creating plastic extrusions. Optimal temperature maximizes uniform fluidity of the plastic, and minimizes the possibility for stress and warping of the final product. Variables such as pressure and friction that build up in the barrel of the extruder mean that temperatures are not remaining c...

The plastic extrusion process begins with the placement of raw resin into the extruder’s hopper. If the resin lacks additives necessary for the particular application (such as UV inhibitors, anti-oxidants, or colorants), then they are then added to the hopper. Once in place, the resin is typically gravity-fed through the feed throat of the hopper down into the extruder's barrel. Within the barrel ...

Prior to beginning the plastic extrusion process, the proper machinery and supplies must be obtained, specifically a plastic extruder machine. This device is a fairly simple machine that facilitates the extrusion process from start to finish. The main components of a plastic extruder include a hopper, barrel, screw drive and screw drive motor. The second most important component is the raw thermop...

The working principle of twin screw extruder1, The polymer in the extrusion process of changes in the state of the law, the principle of transmission of solid melt melt the truth and the law, the establishment of a mathematical model of physics, used to guide the twin screw extruder design and extrusion process optimization.2, To clarify the two or more polymers and materials in the process of ext...

PC Plastic Sheet Line is used to produce PC transparent sheet and PC functional sheet,for auto industry,electronic industry,electrical equipment industry,face shield,safety helmet and etc.

HENGRUI main electrical components are international famous brands, with high quality, to ensure extremely low failure rate.

The first barrier plastic sheet line, in Chinese Market, is processed successfully by HENGRUI in 2001. So far, almost 15 years experience. The latest barrier sheet machine, delivered to the customer in 2016. To produce PP/PS high barrier sheet; recycled materials possible; 5 extruders to realize 7-layer; the feed block with special design, to assure no EVOH/ADH in the edge materials (save cost). ...

Single-screw ExtruderThe first formal production in 2002. The screw structure has been tested for more than ten years. Never bubble or poor plastizing. Twin-screw Extruder100% recycled materials availableWithout dehumidifier or dryer, materials can be extruded directly, save powerApplicationFood, cosmetics, medicine, stationary, toy boxes, gift packaging, under collar

HENGRUI has independent import and export right. There are at least 20% exports each year.So far, HENGRUI machines have been exported to Europe: UK, Sweden, RussiaAsia: Japan (incl. Japanese factories in China and Indonesia), Indonesia, Malaysia, Sri LankaChina: Taiwan

Asia's No.1 Plastics & Rubber Trade FairMay 16-19, 2017China Import & Export Fair Complex, Pazhou, Guangzhou, PR ChinaHENGRUI participates as exhibitor every year.

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In the warranty, HENGRUI should provide new parts and necessary remote aid FOC for the buyer to replace it themselves, if defect or malfunction is recognized without misoperation. HENGRUI should dispatch technicians to the buyer's factor for checking and repairing if be convinced the buyer cannot carry out themselves.

The equipment supplied from the Seller is properly maintained, used, and operated in accordance with the Operation Manual and Technical Documents & other Instructions. The rubber parts of the line shall be guaranteed for six (6) months; and other parts for twelve (12) months from the date of completion of installation and commissioning acceptation of the commodity at the Buyer's place.