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Plastic injection was first performed in 1867. This method was used to make billiard balls. In this way, a person named John W.H injected the celluloid into a mold and as a result, successfully extracted the desired shape.

This procedure became known as plastic injection. About 5 years later, the first person to inject plastic was invented by the same person and his brother.

Of course, this device was very simple and rudimentary and bore no resemblance to today’s sophisticated and advanced devices. But today, very delicate and various devices are produced with the help of plastic injection machines.
The main peak for growth in the plastics injection industry was in the 1940s. On that date, which coincided with World War II, a man named Jim Hendry was able to invent a device for making complex helical devices by injecting plastic. Since then, the progress has been much faster.
How plastic injection works
The most compelling advantage of plastic injection molding machines is that they can produce delicate, high-quality parts in a variety of shapes in a very short time. Of course, this high speed of action does not mean that the work is easy or insignificant. Rather, in order to achieve the desired result, it is necessary to observe all the key points of the work.

There is also a need for high expertise and skills to perform each of these steps. The method of plastic injection can be divided into 4 separate sections. Each of these four steps are:
• Device preparation
Before doing anything, the molds of the machine must be prepared very carefully. At this stage, the accuracy of the operation and the precise fastening of the mold components to each other is very important. The mold usually consists of two parts, movable and fixed.

If the mold components are not fastened together well, major defects will be seen in the final product.
Therefore, high accuracy is required in all stages. Different molds are used depending on the shape to be produced. In fact, this template is the basis for producing the desired shape.
• Mold nutrition
Mold feeding means inserting used plastic materials into the mold. This stage is called injection.

In this way, the desired plastic enters the device. That is, the injection of plastic into the mold to make the desired part is done at this stage.
Then, with the help of compressive force and the created temperature, the plastic melts and forms a mold. This stage requires high expertise and skills and is a kind of main stage. Finally, the softened plastic takes the shape of a mold.
• Temperature reduction
The third step in plastic injection is the temperature reduction step. This stage is also called cooling. In this way, the plastic that entered the mold as a raw material and was formed under the influence of heat must be cooled slowly. As a result, the injected plastic will have a fixed shape.
Dimensional tolerance must be considered in order for the part to be different from the dimensions you are considering. Care must also be taken to ensure that the cooling process is completely principled. Because very high or very low speed in cooling the piece will have a direct impact on the final shape and quality.
• Final level
The final stage is the stage in which the desired part is produced and provided to the operator as an output part. All the necessary points must be done carefully enough, because early removal of the piece from the mold can cause it to break down.
Therefore, it is recommended not to rush this step. First of all, you have to make sure that the plastic piece cools completely. Because the object made is supposed to come out with the help of high pressure.

As a result, any softening due to heat can damage the final product. Immediately after the completion of these four stages, the next stage for making and injecting plastic can be started.
Polishing, payment and post processing
A variety of molds are used today for the purpose of plastic injection. These molds can have complex or delicate shapes due to the advances that have been made in the field of plastic injection. Because with this method, it will be possible to produce all kinds of parts with different shapes.
In general, most of these molds are produced by CNC machine. They are also usually made of aluminum or steel. Post-processing is a type of computer program by which any type of code can be applied to a CNC machine to make a mold.

Of course, no matter how accurate these codes are, after the plastic injection, the final part will need polishing and a small payment to eliminate small defects.

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Therefore, it is not bad to get acquainted with the importance of plastics and high-consumption bottles such as polyethylene and know what goes behind each production line. In this section, join us to acquaint you with the process of making polyethylene bottles.
Plastic bottles are generally divided into two categories; PET bottles and polyethylene bottles. Production of PET bottles is generally done in two stages by plastic injection machines. These devices were usually blowers and blowers, and at first seemed to be an ideal option.

However, building, purchasing or maintaining these devices is extremely costly and difficult. Therefore, polyethylene bottle machines have long since replaced expensive and old technologies and shortened the manufacturing process in parallel. Also, these devices require less manpower.
Machine for making polyethylene bottles
Polyethylene bottle making machines are very similar to plastic injection machines in terms of construction. These similarities are sometimes so great that some of them are called pneumatic injectors. Of course, no matter how many similarities there are, they make a big difference, and that is nothing but clamps and injection nozzles. In the process of producing all kinds of bottles, storage containers, plastic containers, etc., these devices are commonly used.
Economically, pneumatic devices are much cheaper than PET injection or infusion devices. This difference is such that the daily cost of a PET production line is estimated to be approximately one and a half times that of polyethylene machines.

Common plastics used in this product line include detergent bottles, which are sometimes confused with PET bottles for their transparency. However, the transparency of these bottles is only related to the material of their raw materials and has nothing to do with how they are produced.
Of course, the devices used to make these containers and polyethylene bottles are still pneumatic, but the raw material for their production is propylene. These devices are also known as inflatable PP devices due to this use.

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Different methods of printing on bottles

Bottle printing will be done in different and unique ways that will depend directly on the size and shape of your bottle. Since most bottles will be made in the form of circular or square cylinders, the best way to print on these bottles is to use tampo printing machines, silk screen printing, transfer printing, each of which will be done through a special way. . If your piece is such that the surface was not completely flat and there were protrusions and depressions that you want to print on that point, it is better to use a tampo printing machine to do this printing. But if your bottle is completely flat, we suggest using a silk screen printing machine to make flat and symmetrical prints.Note that the design and shape of your piece will have a huge impact on the choice of printing method. We mentioned above that each printing method has different steps to transfer your print accurately and beautifully on your piece. The number of colors used in your design can also have a big impact on choosing the type of printing method. Because in methods such as tampo printing, silk screen printing and gilding printing, each color must be printed separately on your piece, and in the end, the final design will be obtained by putting these colors together. But in the transfer printing method, you can use the design of your desired design on the transfer printing tapes to transfer the designs with different colors in one step on the piece.

Benefits of printing on bottles

Bottle printing has many benefits for you. There are various methods for advertising on bottles, such as printing labels and pasting designs printed on paper on bottles. This type of advertising, in addition to having a lower shelf life than printing on bottles, has a lower quality and working class. Also enjoys. In addition, the use of glue to attach designs to bottles used to store food or medicine may cause harm. But by using the printing methods on polyethylene or PET bottles, you can transfer completely hygienic and first-class foreign colors with a beautiful design on your piece, and in addition to very beautiful quality, you can experience more durability in your advertisements.It should be noted that all prints made in the Evan Plast Alborz Rad complex are resistant by color stabilization devices so as not to be damaged or rotted by paint or other natural factors such as direct light and heat radiation. In addition, these paints are completely washable and you can easily wash and disinfect the bottles that you use for the production of detergents and food detergents using water and detergents.

Steps of printing on the bottle

According to the items mentioned above, to print on the bottle, we have to go through different steps in order to be able to have a beautiful and lasting print. First, according to the shape and material of the bottle, the appropriate color should be selected with that material, and after printing, we should have a higher durability and better brightness.After selecting the type of color, the designers of Evan Plast Alborz Rad collection will prepare your desired design for making stencils and stereotypes, and after making and preparing the appropriate fixture, the printing operation on your desired piece by all-tomat machine with speed and quality It will be done very high. In the end, your design will be fixed on the piece so that it does not break down or fade over time. Note that all steps must be done with great accuracy and quality, and if in any of these short steps is done by the authorities, the possibility of low-quality printing with low durability will be very high.

Get advice on bottle printing

If you need to receive advice in the field of printing on bottles in various types and shapes, you can refer to our contact page with our consultants in the collection of Evan Plast Alborz Rad to according to the shape and material of your piece and design Let us introduce you the best and most suitable printing method. In addition, you can get a lot of information from us in areas such as design, stencil making, color purchase and industrial printing machines.

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.Unlike other prints, which uses paint powder and ink to transfer to the cylinder or zinc to transfer the paint from the cylinder to the part. In silk screen printing, the color screen is printed directly on the piece, which makes the silk screen more shiny and transparent than other prints.

Variety of colors and the power of using color combinations in silk screen printing

Unlike other prints where only one type of color can be used, silk screen printing can be used in various colors depending on the type of material and their color combination. It should be noted that for materials whose material is plastic pp Special pp colors should be used so that the color is not erased or spread on the piece after printing. Similarly, other colors such as pvc and uv colors, each of which can be used in silk screen printing according to the material of the piece.Also, the variety and color scheme available for each type of color with their special properties has made it easy for you to achieve the desired color combination and take advantage of the high color variety in printing. Evan Plast Alborz Rad Company has tried to provide the best quality in the field of printing to its customers by using foreign and Iranian inks.

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