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Tehran plastic injection services

Plastic injection molding is a manufacturing process in which resin is heated in a barrel to a molten state and then placed in a mold to form a part into a mold. The resin starts as plastic pellets, which are gravity fed through a funnel-shaped funnel into the injection molding machine.
The pellets are fed from the hopper into a heated chamber called a barrel, where they are melted, compressed, and sent to the plastic injection molding machine by a reciprocating screw.
As the granules are slowly moved forward by a screw-type piston, the molten plastic is introduced through a nozzle located in front of the mold, allowing it to enter the mold cavity through a gate. The injection molding part remains at a set temperature so that the plastic solidifies almost as soon as the mold is filled.
After cooling, this part will harden in the shape of the mold cavity. Then the two halves of the mold (hole or "A" side and core or "B") are opened and the ejector pins eject the part from the mold, which falls into the waste bin. The mold is then brought closer together and the process begins again for the next part.
Principles of injection molding
The plastic is forced into the barrel or chamber by gravity, and as it moves down, the temperature rise will melt the plastic. Then, the molten plastic with the appropriate shape is forcefully injected into the mold under the barrel, and it solidifies as the plastic cools.
خدمات تزریق پلاستیک that is molded in this way has an inverse shape compared to the mold. With this, you can make different templates. The plastic molding process is changeable due to the simplicity and quality of the plastic material.
The thickness of the mold affects the quality of the produced part. On average, the minimum wall thickness of an injection molded part ranges from 2 mm to 4 mm (0.080 in. to 0.160 in.). The temperature of melting and cooling determines the quality of the formed plastic, and in plastic injection molding, the temperature of the melt in the cavity is generally between 200 and 300 degrees, the melt is formed in the cavity, cools and solidifies into the shape of the product profile.
Insert injection molding
In the injection shop, insert molding is a process that begins with placing metal, ceramic, or plastic parts into a plastic injection mold. After those parts are properly positioned, the mold is filled with molten plastic in a regular molding process.
Gas assisted injection molding
In the plastic injection workshop in Tehran, gas-assisted injection molding is a process that uses an inert gas to create one or more hollow channels in injection plastic parts.
Know the raw materials of plastic injection!
Regarding plastic injection raw materials, there are many plastic or resin materials in the manufacturing industry. Choosing the right material for your custom injection molding project is essential to producing a high-quality part, and each material has its own unique set of properties and chemical composition. When choosing the best material for your injection molding project, consider durability, performance, texture, flexibility, density, and color.
Here are some materials for injection molding production:
polycarbonate
Polycarbonate, sometimes called by the brand names Lexan, Makrolon, Makroclear, arcoPlus®, is a commercial thermoplastic that can withstand severe impacts. It is also transparent and amorphous and can be flexible at room temperature and may be modified without applying heat. Some of the common uses of polycarbonate include making phone cases, pens, car headlights, and more.
Polypropylene
Polypropylene (PP) is the second most produced plastic in the world after polyethylene (PE). Its behavioral characteristics are similar to polyethylene, but it is a little harder and more resistant to heat. Polypropylene is a commodity grade polymer that is popular in the packaging and labeling industries.
PP is hard, resistant to fatigue and chemicals, but vulnerable to UV rays and will be flammable. It is a versatile plastic because it is easily customized with additives. This material is used in making many common products such as buckets, packaging materials, bottle caps, toys and many other things.
PVC
Polyvinyl chloride (PVC) is a popular polymer that is naturally white and brittle and is available in both flexible and rigid forms. The first form is a rigid or non-plastic polymer (RPVC or uPVC) commonly used for building products such as vinyl or pipes.
The second form is flexible, plasticized PVC, made bendable by the addition of phthalates, used for flooring, insulation, electrical wiring, etc.
Acrylic
Acrylic (polymethyl methacrylate PMMA), sometimes called Plexiglas, is a thermoplastic homopolymer often used as an impact-resistant replacement for glass. Acrylic is resistant to ultraviolet rays and light and does not fade.
Its resistance to impact is ten times higher than glass, and the use of acrylic for the production of injection molds has many advantages. Common uses of acrylic include making lenses, medical devices, displays, furniture, paint, beauty products, and more.
resin
Injection molding resins (or thermoplastic resins) are plastics that solidify after cooling. Resins would be ideal for the injection molding process; Because they can be melted and injected into the mold using pressure, and after cooling, form a customized product.
Some common resins used for injection molding include plast
Crystalline ones, amorphous plastics, imidized plastics, polyethylene, polypropylene, acrylonitrile butadiene styrene, polyoxymethylene, polystyrene, etc.
Nylon
Nylon (PA) or polyamide is a common synthetic thermoplastic polymer that is popular for its high melting temperature, tensile strength, low friction, and chemical resistance. Nylon can be combined with many additives to create different types and properties of the material.
ABS
Acrylonitrile Butadiene Styrene or ABS is a thermoplastic polymer widely used for injection molding. It is durable and can resist scratching, ABS plastic is not very sensitive to temperature or humidity, and its high temperature molding gives it good heat resistance and gloss. Therefore, its properties and final strength are affected by the conditions used in the manufacturing process.
Thermoplastic rubber
Thermoplastic rubbers are ideal for injection molding production because they can be liquefied, injected under pressure, and then cooled to form a custom product.
Polystyrene
Polystyrene (PS) is a transparent thermoplastic that is often used to produce disposable products. As a Styrofoam, it can be extruded to make disposables and more.
Low density polyethylene
Low-density polyethylene (LDPE) is a type of polyethylene (PE) that is made using high pressure and high temperature. LDPE can be used to make hex rings, toys and computer components. Polyethylene products make up 34% of all plastics in the market.
Fiber reinforced plastic
Fiber Reinforced Plastics (FRP) is a cost-effective material that results in lighter, more durable products. It also lowers the cost of plastic injection.
Acetal/Polyoxymethylene (POM)
Polyoxymethylene (POM, acetal, polyacetal, polyformaldehyde) is a combination of plastic materials used to create parts with good dimensional stability, low friction and high strength. It also lowers the cost of plastic injection.
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