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you know heat makes something expand and cold makes it contract. When injection molding the plastic material is hot, so it expands and when it is cold it shrinks. That is why how shrinkage comes.

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Why pneumatic system used in injection molding machine?

Pneumatics aren't used in injection molding.Injection molding is the process of, as the name suggests, injecting polymers into a mold through a heat treatment of the polymer.It's placed into a bucket in small pieces of coloured plastics, as this feeds into a rotating centre point, it's heated and forced into a smaller and smaller point, then when it comes out of the injection molding machine into the mold itself, it's in liquid form, and the pressure from the molding machine itself forces the liquid polymers into the form of the piece being made.


What simple machine would use to shop down a tree?

An axe is the simplest tool to chop down a tree. Next comes two handle saws. As to a machine - chain saw.


A fan is a complex machine?

Yes, a fan is a compound machine. This is because it is made up of several simple machines connected together.


What are the limitations of precision machining?

There are classes for students who can take precision machining. A company called Choice Precision Machine says there is not limitation of distance or job when it comes to shop manufacturing.


How do you find the efficiency of a simple machine?

The efficiency of a machine is found by considering the useful energy or work that comes out of it, and dividing this by the work that you put into it. Multiply by 100 to get the answer in terms of percentage. You should never get more than 100% efficiency, or 100%, since energy will be lost (to heat caused by friction for example).

Related Questions

Why pneumatic system used in injection molding machine?

Pneumatics aren't used in injection molding.Injection molding is the process of, as the name suggests, injecting polymers into a mold through a heat treatment of the polymer.It's placed into a bucket in small pieces of coloured plastics, as this feeds into a rotating centre point, it's heated and forced into a smaller and smaller point, then when it comes out of the injection molding machine into the mold itself, it's in liquid form, and the pressure from the molding machine itself forces the liquid polymers into the form of the piece being made.


why shrinkage testing is important?

Shrinkage templates directly measure shrinkage without any markings and calculation errors. Shrinkage testing machine of Amith Garments comes with calibration certificate along with the user manual.


Understanding Injection Molding?

When it comes to manufacturing high volumes of plastic parts or components, few processes are more efficient or effective than injection molding. Since being developed in the 1930s, injection molding has become one of the most popular methods of creating plastic parts and pieces. The process, which was inspired by the metal die casting techniques, brings many benefits to the table. By understanding how it works, you can get a clearer idea for why it is so enduringly popular.The Injection Molding ProcessThe injection molding process begins with the injection of small resin pellets into an injection molding machine. The machine is made up of two primary components - a clamping unit and an injection unit. Before the process starts, a mold is created that will be used to form the plastic part that is needed. Once the mold has been clamped closed with high pressure, the resin pellets are put into the machine. Colorants are put in along with them, to give the resulting part the appropriate color.When they are placed in the injection molding machine, the resin pellets fall into its injection unit. The unit is heated up and the resin pellets are melted. The resulting molten plastic material is then injected into the mold, or clamping unit. This is achieved through the use of ramming devices or screws.At this point in the injection molding process, mechanical or hydraulic pressure is applied to the molten plastic. This is done in order to ensure that every corner of the cavity is filled, so that there are no deformities in the completed part. Following this point, the plastic is allowed to cool. The two halves of the clamping unit are eventually opened and the completed part is ejected with ejecting pins. Any extra pieces, or runners, are trimmed away and recycled.The Top Benefits of Injection MoldingInjection molding is popular for many reasons. Finishing requirements are minimal; when a piece is complete, little else usually needs to be done to make it usable. Injection molding is also very efficient. The process doesn't generate a lot of waste, since the little scrap that is produced is usually remelted or otherwise recycled. For manufacturers, these benefits translate into savings; in turn, a company's bottom line can be greatly improved. Considering the fact that one injection molding machine - and one mold - can create thousands of identical parts, it's easy to see why the process is so well regarded.


How do I find molding for home projects?

Molding for home projects can be found at a local hardware store near you and molding comes in a variety of styles that will suit your needs and styles.


What are the different styles and materials available for cabinet molding?

Cabinet molding comes in various styles and materials, including wood, MDF, and polyurethane. Common styles include crown molding, light rail molding, and base molding. Each material and style offers different aesthetics and durability for your cabinets.


Where did the name foamposite come from?

The name "Foamposite" comes from the material used in the construction of the shoe, which is a polyurethane foam with a liquid injection molding process. This technology was originally developed for military footwear before being adapted for Nike's basketball shoes.


How do you use hypodermic injection in a sentence?

The flu vaccine comes in a nasal inhalation and in a hypodermic injection.


What is the force that comes from a machine?

matter is the force that comes from a machine. Funny thing, there are lots of forces that come from a machine but the force of matter is the most powerful.


What Is Water Stress In Egypt?

The main water stress in Egypt comes from a combination of the shrinkage of the Nile, the faulty pipe system, and the growing population.


Meaning of xerox machine?

Photo copying machine is the Meaning of xerox machine. It comes from the company xerox corp.


Which leg press machine has the most weight that comes with it?

Yukon Fitness Husky Hip and Leg Sled Exercise Machine comes with a sufficient amount of weights.


What is picture frame molding and how is it used in framing artwork or photographs?

Picture frame molding is a decorative trim that is used to create the frame for artwork or photographs. It is typically made of wood or metal and comes in various styles and finishes. The molding is cut to size and assembled around the edges of the artwork or photograph to provide a finished and polished look. It helps to protect the artwork or photograph and enhance its presentation.