An overview of the history of rotational molding in the world
The history of rotational molding , has had its ups and downs like the history of any other growing industry.
If you are familiar with the use of rotational molding, it will be interesting to learn about the history of rotational molding too.
So stay with us in this article.
Many products that are produced in rotomolding factories today are the result of years of hard work and efforts of artisans and the development and advancement of shuttle rotomolding machines in factories.
In fact, many of the advanced tools that we use today are the result of the innovations of the past decades.
The history of rotomolding goes back more than 200 years. This data is from the late 1700s. that using an external temperature source, hollow shapes were made.
Like all other technologies, the rotomolding industry has also developed significantly over time.
It is true that the machines we use today are in no way comparable to the machines of a few decades ago, but the work process, which is the rotation of materials inside the mold, has remained the same.
Before reading the rest of this article, we recommend you to read the article: ” what is rotational molding ” .
The history of rotational molding has a long history, and this history goes back to the ancient Egyptians who used it to produce ceramics.
About 100 years ago, the Swiss used this method in making egg chocolates.
Some researchers claim that this industry was used for the first time in Germany in 1780-1790.
The first invention related to the history of rotational molding dates back to 1855. This invention relates to ball tubes and metal hollow shells.
About 10 years later, advancements in this industry led to products with more uniform thickness and density.
If we go a little further, in the years between 1940-1950 AD, the rotomolding method has been used in America. But at that time, plastic production with this method was not very popular, because it was slow and time-consuming.
The history of rotational molding and making children's toys
In the continuation of your acquaintance with the history of rotational molding , we must say that in recent decades, with the progress made in this field, as well as with the development of the plastic powder used in this method, this industry has become more popular with a much larger number of products.
Because of that, they were released in the market.
The first application of rotomolding was to make doll hands in the 1940s. The mold was made of nickel and copper and the polymer used was PVC.
After that, many toys including balls were made using this method.
In the 1950s of rotomolding history , this method became more popular among craftsmen, and it was used in other industries and businesses, including buoys and seat handles in cars.
In 1955 highly efficient powder-making machines were made in Germany. The advantage of these machines was the ability to produce powder from plastics with a low softening temperature, without using cooling agents.
This brought about a significant change in the history of rotational molding .
From the beginning of the 1950s, aluminum entered this field. Today, cast aluminum is used in making rotational molding molds .
This industry flourished in Europe in the 1960s. At this time, more hollow plastics were produced. These plastics were made of LLDPE.
Until the 1960s, high-density polyethylene was used in the construction of fuel tanks for some vehicles. In order to improve the chemical properties, heat, and impact resistance at low temperatures, crosslinked polyethylene was used in 1970.
The 80s of the history of rotational molding was the decade when the expansion of this industry became widespread in the world.
By 1980, the rotomolding process was more widespread in the world. As a result, many more products began to be produced.
Due to higher demand, the number of products produced by this method increased day by day.
For example, water and chemical storage tanks with different sizes and shapes were produced from polycarbonate, polypropylene, LDPE, and HDPE.
The manufacturing of marine and war products also took place in the history of rotational molding in the eighties.
This method was used in the manufacture of war equipment in 1855, and in the manufacture of kayaks in 1984,
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