Plastic is an extremely flexible material
that has revolutionized manufacturing processes in numerous industries. It is
used for a great variety of applications, because of the many advantages it
confers. Plastic is durable, lightweight, and impact-resistant and can be
easily shaped into any form. We are surrounded by plastic products or all sorts
of devices using plastic parts and components. Laptops, computers, cellular
phones, cars are just a few examples of devices which use plastic in their
Depending on the type of
products to be manufactured, different plastic manufacturing processes are
employed. There are three types of processes used for plastic manufacturing,
according to the product requirements: injection molding, plastic extrusion
molding and thermoforming.
Injection molding is the most
common type of plastic manufacturing process, creating many practical plastic
products. By means of thermoplastics, injection molding presses plastic pellets
into various molds until the plastic cools ad hardens into the appropriate
shape. When the products is cool it is scraped off the mold, and the excess plastic
gets recycled. Sometimes, injection molding can leave a small residual line
from where the mold parts join. Products manufactured through injection molding
include all sorts of plastic containers, toys, tubing and many others.
By means of plastic extrusion
molding, the plastic is melted and shaped over a mold, not inside the mold like
with injection molding. The plastic is melted over a particular mold, cooled
either by spinning or by cold air blast, then the mold is pulled out through
the mold cavity - a small hole in the product. This plastic manufacturing
process is more appropriate for products used intensely, such as auto bumpers
and hoses, tool cases, surf boards, tanks or other plastic products that
require higher impact resistance.
Thermoforming is a less intense plastic manufacturing process. Thermoforming
heats a large heat of plastic until it becomes pliable, then the plastic is
tugged, pulled and lifted into a shape in a process similar to clay modeling. Plastics
products are the basic products of our lifestyle.
Browse the Yellow
Pages business directory for listings and detailed information on plastic products in South Africa and compare
plastic products and services.
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in east end, bloemfontein, free state