A Plastic Mold Manufacturer’s Guide to Plastic Molding
YXT-Precision, a leading plastic mold manufacturer, presents this simple guide to help you understand everything about plastic molding, and the different types of molding processes available. This guide aims to help you find the best and suitable molding process for your product.
What Is Plastic Molding?
Molding or moulding, is the process of manufacturing plastic parts by shaping liquid or malleable material with the use of a rigid frame known as a mold or matrix. Plastic molding is an exceptionally flexible technique of making plastic parts and has numerous benefits over other ways of plastic molding.
When molding plastics, a liquid or powder polymer such as polypropylene or polyethylene is put into a hollow mold so the polymer can efficiently hold its shape. This process is not only more reliable and simpler than other methods, rather it is also very efficient.
The Chronicle of Plastic Molding
The concept of plastic molding started back in the late 1800’s. The reason was to meet the demand for plastic billiard balls instead of the commonly used ivory billiard balls of the time. Initially, John Wesley Hyatt in 1868 devised a technique to create billiard balls by injecting or adding celluloid into a mold. A few years later in 1872, the machine was invented by John Hyatt and his brother to automate the process, which was the world’s first plastic injection molding machine.
The screw injection molding machine, invented by James Hendry in 1946 replaced the needle injection technique, and is one of the most used techniques in today’s time. In the early 1950s, plastics were introduced when rotation molding was first used to make doll heads. Over the past few years, better equipment, process developments, and plastic powder progress have perfected the process to create finished products which have contributed to its rapid growth.
The Different Types of Plastic Molding
Rotation molding, compression molding, injection molding, blow molding, thermoforming and extrusion are some of the most popular practices in plastic molding. In this guide, we have briefly covered the two most popular techniques i.e., rotational moulding and injection moulding to help you decide the best and most suitable process to make your product or part.
Rotational Molding, or rotomolding, is a manufacturing process to produce big hollow parts and products. The power or liquid resin is placed into a metal mold and rotated inside an oven until the inner part of mold gets completely coated by resin. Centrifugal force is created by the constant rotation of the mold, and that’s why even-walled products are formed. The hard-edged plastic is removed from the mold after it gets cool down.
Rotational moulds are highly customizable and are a cost-effective and environmentally friendly process, and that’s why it is a preferred process of every plastic mold supplier and manufacturer. Very little material is wasted during the process, and excess material can be re-used.
Common Uses for Rotational Molding: storage tanks, bulk containers, road cones, playground slides, car parts, storage tanks, pet houses, car parts and recycling bins.
Injection molding is the process where the molten plastic material is injected into a metal mold at high pressure for making custom plastic parts. When the mold is cooled, then a solid plastic part is taken out. It is used for making custom plastic parts in very high-volume.
Injection moulds are made up of either aluminum or steel and are an expensive process. But if need parts in bulk, the cost per part is very much economical.
Common Uses for Injection Molding: car parts, surgical parts
Why Choose YXT-Precision?
YXT-precision has been working for over 20 years as a leading plastic mold manufacturer and supplier, delivering our customers the best plastic injection moldings, metal stamping, and CNC milling parts at a very competitive price. We are a one-stop mold solution professional, capable of delivering quality from beginning to end.