The History of Pastic Injection Moulding

In 1868, Hyatt developed and improved a plastic material and makes it in the shape of an article.  Then in 1872, he and his brother Isaiah registered the first patent plunger-type injection molding machine. Basically it is running like a giant hypodermic needle. This huge needles inject plastic into the mold through a heated cylindrical.

In the 1940s, during the Second World War, ​ huge demand of cheap mass-produced for the product made it popular.

In 1946 American inventor James Watson Hendry build the first injection molding machine, which makes the injection more precisely controlling the speed and quality of an article. In 1951 the United States developed the first screw injection machine.

In the 1970s, Hendry then developed the first gas-assisted plastic injection moulding process and allows the production of complex, hollow products, of rapid cooling. This greatly increases the flexibility and strength of the design and the end parts manufactured while reducing production time, cost, weight and waste.

A Famous China Plastic Box Molding Company -Eiffel

Do you looking for plastic box molds?

If so, I would introduce you a plastic box molding company who has been in the industry for over 2 decades – Taizhou Eiffel Mould Plastic Co., Ltd

Founded in 1992, Eiffel has cultivated a production team of comprehensive technology and rich experience. Eiffel now is proudly to be a Famous China Mould Manufacturer. Eiffel works on various kinds of plastic box molds, such as crate mould, pallet mould, beer and bottle box mould, storage box mould, folding box mould and so on.

Welcome to visit our website for more information: www.bigmould.com

Email: info@bigmould.com

plastic box mould
plastic box mould

How to do Plastic Injection Mould in the Factory?

The mould tool is the key component in the plastic injection moulding

  1. It provides a passageway for molten plastic to travel from the injection cylinder (barrel) to the mould cavity.
  2. It allows the air which would be trapped inside when the mould closes to escape.  If the air could not escape (be vented) then the moulded component would contain voids (air bubbles) and have a poor surface finish.
  3. It cools the moulding until it sets.  The temperature of the mould is controlled because it is important that the moulding cools at the correct rate to avoid distortion and stress.  In most systems water circulates through channels drilled through the mould similar to a car engine cooling system.
  4. By means of ejectors the finished moulding is pushed from the mould.

 

THE PLASTIC MOULD TOOL

 mould

  1. Guide Pins – fixed to one half of the mould and align the two halves by entering the holes in the other half.
  2. Runner – passageways in the mould connecting the cavities to the sprue bush.
  3. Gate – Frequently the runner narrows as it enters the mould cavity.  This is called a gate and produces a weak point enabling the moulding to be easily broken or cut from the runner.
  4. Sprue Bush – Tapered hole in the centre of the mould into which the molten plastic is first injected.
  5. Locating Ring – Positions the mould on the fixed platen so that the injection nozzle lines up with the sprue bush.
  6. Mould Cavity – The space in the mould shaped to produce the finished component(s).
  7. Ejector Pins – These pins push the moulding and sprue/runner out of the mould.
  8. The Shot – Total amount of plastic injected into mould.
  9. Sprue – Material which sets in the sprue bush.

What is the Process of Plastic Injection Moulding?

The plastic injection moulding process produces large numbers of parts of high quality with great accuracy, very quickly.

Plastic material in the form of granules is melted until soft enough to be injected under pressure to fill a mould.  The result is that the shape is exactly copied.  Once the plastic moulding has cooled sufficiently to harden the mould opens releasing the part.  The whole injection moulding process then repeats.

 

 

04

Close Mould

CLAMPING – the moving and fixed platens of the injection moulding machine (see next section) holds the mould tool together under pressure.

                        01

Inject Molten Plastic

INJECTION the molten plastic that has been melted from pellet form in the barrel of the moulding machine (see next section) is injected under pressure into the mould.

 

02

Hold Mould Closed

DWELLING after the molten plastic has been injected into the mould pressure is applied to ensure all cavities are filled.

COOLING the plastic parts are then allowed to solidify in the mould.

                                      03

 

Open Mould and Eject Part

OPENING the moving platen moves away from the fixed platen (see next section) separating the mould tool.

EJECTION – rods, a plate or air blast then aids ejection of the completed plastic moulding from the injection mould tool.

The length of time from closing the mould to ejecting the finished plastic moulding is the cycle.

How could OPP film be so popular?

Today, OPP film is everywhere. It can be widely used in food packaging, as well as cloth and footwear, and it can also be use for cigarettes, and book cover packing.

OPP packaging tape-it is the polypropylene film to the substrate, due to the advantages of high tensile force, lightweight, non-toxic, tasteless, and environmental protection.

Then, why is OPP film so popular?

OPP film has low surface energy, so it needs a corona treat before printing and gumming. And, after the corona treatment, the OPP film will have a good printing adaptability, and then you will get the elegant appearance, so it is commonly used for composite membrane surface material.  

Huangyan Mold History

Mould as the mother of industrial sector, for pillar industries of the national economy like machinery, electronics, automotive, petrochemical and construction played a role as benefit amplifier and a measurement of a country’s manufacturing sector.

Huangyan mold industry sprout in the 1950s. By the end of 2009, there are more than 2,000 mold manufacturing enterprises, including plants, of which more than 500 professional mold enterprises, and over 90 are sizeable. In 2009 in the whole Huangyan region, the output value exceeded ten billion, and mold has become a local pillar industry, at the same time Huangyan mold industry is the country’s most concentrated area.

After years of development, the mold industry cluster effect significantly, forming complete mold manufacturing industry circles. Huangyan Mold has gone from hand-molding to the modern CNC mold production process, and has become a world-renowned mold production base.

At the situation of the Huangyan mold industry come to the birth of public network service platform: imould.com, who as the platform carrier, from the beginning to serve the construction of the main corporate network Huangyan Mould camp, develop into all mold-related enterprises online marketplace for online transactions.

imould.com takes information technology services as the means to establish an efficient manufacturing market online, and become a sustainable, customer satisfaction mold industry public service platform.

Apple Loves Plastics?

Iphone 5C was officially launched on September 10. Just like it is expected before, the body of which made of plastics looks cheaply in some of their fans’ eyes.

The polycarbonate housing was solemnly introduced in this press conference: “It is an extraordinarily rigid structure and has a solid, dense feel that you would not expect from a plastic product.”  

As a leader of high-tech industry, Apple is always pursuing innovation in both technology and new types of materials. Just like the polycarbonate, as a member of the family of plastics, it’s lightweight, strong, and cost effectively-this materials can be injection molded into some complex shapes and it can be went into mass production.

Apple loves plastics. This trend will probably become more widespread over the coming years with advances in technology.

Keys to Make a Good Plastic Bottle

There is no doubt that preform has played an important role in the plastic bottle making. As a semi finished product of plastic bottle, preform mould maker have to consider much aspects, not only its quality, shapes and raw materials, but also the convenience of transportation.

And because of this, some powerful plastic bottle manufactures prefer to purchase bottle preform for processing. And it should be remembered that most professional manufacturers adopted this processing method.        

The production of preform should following the standardized process, and it can be differentiated by size, gram weight and raw material. Preform can be transparent or opaque, with different colors.

 That is to say, great efforts should be made to improve the quality for preform. Only high quality preform can help create a qualified plastic bottle.

What’s the Challenge of Preform Mould Industry?

The basic requirement of preform mould products are made free from any defect or flaw. There is no doubt that “quality first” is a fundamental principle that guide the much aspect of preform mould’s production. Even though the products we see around us are made of plastics, they are could still be strong and long-lasting.

Second important is the uniqueness of preform mould products. Generally speaking, each manufacturing project has its own shapes and sizes. With the help of preform mold technology, this plastic has been shaped in a most suitable treatment.

For buyers, whether it could delivery products on time is also an important judgment on factory selection. No matter how perfect your product is, you have to face a lot of trouble if you are failure to ship the goods in time.