FABRICATION OF A POLYTHIENE BAG SEALING AND CUTTING MACHINE. A RESEARCH PROJECT MATERIAL ON MECHANICAL ENGINEERING
CHAPTER ONE
1.1 INTRODUCTION
The portable sealing machine is one of the most important fabrication of engineers of 20th century, the achievements led to sweet relieve for Agriculturist, industrialist, marketers etc. for this purpose, the production of Agricultural and industrials, goods which need appropriate attention for packaging and storage has been on the increase.
Previously, the packaging system has done by the use of paper, clothing material, etc. These methods are either given way to cellophane packaging system.
Different types of packaging system emerged owing to the facts of invention of which the most commonly used is the cellophane packaging and sealing.
It has the following advantages:
Low cost of production, high resistance to acid attacks, inertness, corrosion etc.
Polyethylene is used in packaging goods like ice cream, umbrellas, exercise books, pure water, beverages, weavon, packet shirts, bread, biscuits etc. the following properties polyethylene possessed are the reasons for its varieties of purpose that is to say how cost of production, inertness, resistance to acid, and corrosion water.
The use of polythene cannot be overemphasized. Most of food packaging for hygienic. The technology of cellophane permits raw materials of textile industries to be carried with sealed polyethylene the finished products are either marketed or exported with polyethylene packaging. Most utensils are packaged with polyethylene. Special polyethylene materials have been invented of recent that have shock absorber which gives protection to the breakable material. Since this packaging came up, there had been a safer conveyance of glass and ceramics materials, especially for transportation and exportation of finished goods.
Also, it is in packaging most of electronic gadgets which includes; computers, amplifiers, calculators, radio and T.V sets etc. for safety purposes. It will be needless talking about polyethylene. Without talking about the machines used in sealing generally. Some of the machines used in the industries include cellophane sealing machine used in sealing polyethylene materials, pneumatic, electrical sealing machine handled by electrical heater and needle point action and hand sealing.
CHAPTER TWO
2.0 LITERATURE REVIEW
Based on the advancement of science and technology, there are different types and fabrication of scaling machine in use today. These include: the pneumatic sealing machine, which uses air pressure mechanism in its sealing operation. Most industries that deals on food, drinks, alcoholics and non – alcoholic, use these types of sealing machine.
Another example of sealing machines is the electrical sealing type. This machine is used for cellophane, nylons fabric, synthetic leather and other items. The operation is handled by electrical heater and needlepoint action.
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