Global Polytec Ltd.,Part.

Posts Tagged ‘moulding’

Netstal plastic injection moulding machine2
Video Rating: 3 / 5

Making Plastic – Plastic Moulding

Ever wondered how plastic is moulded into the exceptionally useful things that we employ in our daily life? Is it as simple as melting plastic and lathering the sides of a mould with it and cooling it, much like chocolate? The answer, actually, is no. Moulding plastic is a little more complex than that. Plastic is made using a process often called plastic injection moulding.

What is this type of moulding

Plastic injection moulding is the method of manufacturing parts made of thermoplastic and thermosetting plastic by melting and forcing into moulds where they cool to form the desired object.
How does plastic injection moulding work?

The process of plastic injection moulding usually begins with an industrial designer or engineer who designs a product. This is followed up by the work of a toolmaker or mould maker who makes the mould to fit the design created. These moulds are metallic and usually made using either steel or aluminum.

Using machines, they are made to acquire the exact shape desired by the design. Once this is done, the process of actually making the plastic follows. This involves thermoplastic and thermosetting plastic being fed into a heated barrel and mixed. This melted material is then forced into the cavity of a mould and there it cools and hardens to form the desired part.

Some characteristics of the process:

1. I uses melted and mixed thermoplastic or thermoset plastic as the base
2. It uses a plunger which acts like a screw or a ram to force the melted material in the mould
3. It makes a shape that is open-ended and has taken the shape of the cavity of the mould
4. It shows a parting line and gate marks on the finished products and the ejector pin marks can also usually be made out

Some history

Alexander Parkes invented plastic in 1851 in Britain. This was worked on and bettered by John Hyatt, an American inventor in 1868. He also patented, in 1872, the first injection moulding machine. In the 1940s, the need for mass production of plastic products increased and saw the invention of the first screw injection machine by inventor James Hendry of America. This increased not only the speed of production but also the amount of precise control that could be exercised on the finish of the product.

Since then, this type of moulding has been used widely in the production of everything right from milk cartons to entire car panels and automotive parts. Since it is not a very costly material, it is best suited for mass produced goods.

Advantages of this type of moulding:

1. The rate of production are very high and therefore mass production is much benefitted
2. Since tolerance levels are high, they can be repeated
3. The labour cost is very low
4. The losses in scrap are very minimal
5. The products require very minimal finishing
6. A wide range of materials can be used

Disadvantages using this type of moulding:

1. Although labor expense and scrap loses are minimal, the cost of equipment and therefore investment is high
2. The running costs have the potential to be high
3. There is also need to design the correct parts

Billion 160 40 plastic injection moulding machine

machine no.3 with marcelo,me and domeng.

Plastic Moulding Innovation for The Smaller Company

Everywhere you look in the world you can see and feel plastic. Its pivotal to our lives – it is hard to imagine life without plastic fantastic.  No wonder plastic mouldings is a massive global business.

Approximately 30% of all plastic materials are manufactured by injection moulders. A very large proportion of this percentage is made through custom injection moulders technologies.  The process of custom injection moulding is quite complicated to the uninitiated and requires a large amount of specialised machinery to make it happen.  That is before the consideration of the selection of the raw materials which must be chosen for its quality and elasticy that depends on the end product being developed.

Given the wide-spread utilisation of plastic, there are many smaller companies that could benefit massively from plastic injection moulders as a way to produce parts. Given that the equipment needed is expensive,  the overheads for developing new products is preventing companies from innovating.

Thankfully, for these smaller companies, there are organisations that specialise in custom plastic injection moulders. They will make a mock up mould to the exact specifications, run it through the complete process and present the completed product to the customer for analysis.

One such company serving the UK is Iota Sigma. If you are looking at developing cost effective plastic mouldings through the utilisation of injection moulders then Iota Sigma, a Wales based Plastic Mouldings manufacturer, can provide friendly and constructive advice.  They can help develop products from the very first sketch through to custom rapid prototyping making a new concept for the enterprising company a low-cost reality.

Iota’s Sigma’s involvement early on in the development of a project can be a distinct advantage to the final finished product.  They claim their professional approach in ensuring customer quality, materials, process to meet specific goals and their plastic mouldings knowledge utilising Injection Moulders are second to none.  They are fully quality-driven and covered in the scope of their ISO9000 quality accreditation.

(webmaster@cnmoulding.com) high precision part with thread,because customer not allow the fix insert to let mould automatically working, so we have to design with manually. customer request is always what we should to do. we change follow customer change, visit www.cnmoulding.com for detail

Im not sure the exact day they installed these but during my visit on 7/18 I noted at least 8 of these machines around busch gardens. This video was taken just outside of jungala. The video doesnt capture the tiger well but it sure does show the machine is definately either a refurbished model or brand new. If indeed busch gardens is bringing this back than I wonder if they have similar plans for other parks. Either way this is definately a curiousity to bring back even as busch gardens looks about ready to be sold to someone else.
Video Rating: 3 / 5

All You Need To Know About Plastic Moulding

We cannot imagine a world without plastics. Plastics have found their importance in almost all application ranging from household items to complicated research equipments. Though there were controversies that the plastics pose a threat to the environment, the advancements in plastic manufacturing technologies have given birth to the eco-friendly plastics. Plastic manufacturers can now recycle and create new plastic products out of the used plastics. You will be well aware of the fact that injection moulding is widely used to manufacture the plastic products. Today’s plastic moulding is very much advanced and very different from what was originally invented. Just keep on reading the article to know all about the plastic moulding techniques.

A Little History

Plastic moulding is not a new concept developed in the 21st century. Moulding plastics into useful products exits since the origin of manmade plastic in the year 1851. The process of heating plastics and melting the molten material to obtain the shape of the mould is the basic concept behind plastic moulding. Though the concept of plastic moulding remains the same today, this technology has seen many advancements. Plastic moulding received huge importance during the period of Second World War due to the demand for the plastic medical equipments. Infact the plastic manufacturers where struggling to meet the demand for the plastic products during this period. This is period when the plastic moulding industry got a new shift towards development.

Current Plastic Moulding Techniques

Though the main concept of plastic moulding remains the same, the equipments used by the plastic manufacturers have changed a lot. With the integration of latest computer technologies the production rate of plastic moulding is greatly increased today. Unlike the olden days only when only fresh plastic materials were moulded to useful products, today with environmental awareness on the rise, plastic moulding concentrates on using recycled materials. Moreover, the advancements in plastic moulding technology has made it possible to manufacture products in any complicated shapes.

The Applications Of Modern Plastic Moulding

The applications of plastic injection moulding are virtually unlimited. Starting from simple plastic carry bags to complicated lifesaving devices – every plastic product manufactured today are through plastic injection moulding. Some of the common applications of plastic moulding are the manufacturing of products such as packaging bags, automobile parts, beverage cans and bottles, computer accessories etc.

The Future Of Plastic Moulding

You will be well aware of the fact that the use of plastics is banned in certain areas of all countries. People think that this may end the plastic manufacturing as environmental pollution is a major concern today. However, with the introduction of the recyclable plastics, the plastic industry has got a rebirth. Afterall, as already said, we cannot imagine a world without plastics.

Related Plastic Injection Articles

www.cnmoulding.com ,who can give us some suggestion how to solve the problem for so big deformation when we use HDPE material, if use ABS,no anyproblem, four point hotter runner a lot of ribs at back side
Video Rating: 0 / 5

plastic bags manufacturing -LMT- Lashen Plast
Video Rating: 5 / 5

Plastic injection moulding using robot seperating sprue and LH & RH impressions, lights out
Video Rating: 5 / 5

Making Plastic Mold-Plastic Injection Moulding

Ever wondered how plastic is moulded into the exceptionally useful things that we employ in our daily life? Is it as simple as melting plastic and lathering the sides of a mould with it and cooling it, much like chocolate? The answer, actually, is no. Moulding plastic is a little more complex than that. Plastic is made using a process often called plastic injection moulding.

What is this type of moulding

Plastic injection moulding is the method of manufacturing parts made of thermoplastic and thermosetting plastic by melting and forcing into moulds where they cool to form the desired object.
How does plastic injection moulding work?

The process of plastic injection moulding usually begins with an industrial designer or engineer who designs a product. This is followed up by the work of a toolmaker or mould maker who makes the mould to fit the design created. These moulds are metallic and usually made using either steel or aluminum. Using machines, they are made to acquire the exact shape desired by the design. Once this is done, the process of actually making the plastic follows. This involves thermoplastic and thermosetting plastic being fed into a heated barrel and mixed. This melted material is then forced into the cavity of a mould and there it cools and hardens to form the desired part.

Some characteristics of the process:

1. I uses melted and mixed thermoplastic or thermoset plastic as the base
2. It uses a plunger which acts like a screw or a ram to force the melted material in the mould
3. It makes a shape that is open-ended and has taken the shape of the cavity of the mould
4. It shows a parting line and gate marks on the finished products and the ejector pin marks can also usually be made out

Some history

Alexander Parkes invented plastic in 1851 in Britain. This was worked on and bettered by John Hyatt, an American inventor in 1868. He also patented, in 1872, the first injection moulding machine. In the 1940s, the need for mass production of plastic products increased and saw the invention of the first screw injection machine by inventor James Hendry of America. This increased not only the speed of production but also the amount of precise control that could be exercised on the finish of the product.

Since then, this type of moulding has been used widely in the production of everything right from milk cartons to entire car panels and automotive parts. Since it is not a very costly material, it is best suited for mass produced goods.

Advantages of this type of moulding:

1. The rate of production are very high and therefore mass production is much benefitted
2. Since tolerance levels are high, they can be repeated
3. The labour cost is very low
4. The losses in scrap are very minimal
5. The products require very minimal finishing
6. A wide range of materials can be used

Disadvantages using this type of moulding:

1. Although labor expense and scrap loses are minimal, the cost of equipment and therefore investment is high
2. The running costs have the potential to be high
3. There is also need to design the correct parts

With the development of the market, the diversification of molding methods and new plastic materials would be developed in the future. In order to meet the needs of the market, whether plastic mold species, structure, performance or processing are bound to faster development. What’s more such a development must keep pace with the times.

Plastic Injection Moulding – Explained

You will be well aware what moulding is. Moulding can be precisely defined as giving a particular shape to something in a molten or plastic state. Plastics are widely used today instead of conventional glass, wood and other materials because of its high durability. These plastics are molded into desired shapes using various techniques. The plastic injection moulding is one of the cost effective moulding techniques available today.

Little history about Plastic injection moulding

The injection moulding process is not a new concept. It came into existence by 1872. By the introduction of plastic injection moulding, the plastic industry saw multi-billion dollar earnings, with 32 % of all plastics, by weight processed by injection moulding. This has made the plastic injection moulding the best moulding method ever available.

The Principle of Plastic Injection Moulding

Thermoplastics and thermosetting plastics are the two materials that is involved in the plastic injection moulding process. Some of the polymers used in injection moulding are Epoxy and Phenolic that comes under thermosetting plastics, whereas the nylon and polyethylene comes under the thermoplastics. In this process the liquefied plastic is fed into a heated barrel where the plastic granules are mixed and forced to form a mold cavity. Once this is done, the molded cavity is cooled and then hardened.

The plastic moulding machine consists of the reciprocate screws to mix the plastic granules, while the moveable pattern molds the plastic into desired shape which takes place in the clamping part of the machine. The engineer designs the mould, and then a mold is manufactured by the mold maker either in aluminum or iron to make a desired part in a precision machine. Injection moulding is widely used for manufacturing variety of components from small parts to the entire components for vehicles.

Application

Plastic injection moulding is used to produce many parts like bottle caps, containers, plastic combs, home appliances and most other plastic products that we use today. Injection moulding is the only technique for producing many idle products in large volume and the most common method in part manufacturing. Low labor costs, materials can be used in wide range, scrap losses are minimal and high tolerances are repeatable are some of the advantages of the injection moulding techniques.

Usage of Polymers

According to BBC, in 1995 approximately 18,000 different materials were used in this process and the number was increasing at an average rate of 750 per year. Materials are chosen by the product designers, from alloys or from the previously developed blend material that has exactly the vast properties.

For injection moulding, the materials selected are based on their strength and function required for the final part. Also, the material used has different parameters for moulding and that has to be taken in account.

The injection moulding process can be of different types, namely Co-injection moulding, Fusible core injection moulding, Gas-assisted injection moulding, In-mold decoration and in mold lamination, Microinjection moulding, Multiple live-feed injection moulding and with some other types.