Plastic materials are versatile and easy for manufacturing. Raw plastic materials have become a part of modern human life and casting bronze. Plastic is a polymer and a molecular chain mixed with additives to preserve and protect the product. It has durability and a light-weighted, keeping the parts and components in good condition.
The benefits of plastic offer design freedom. Due to advanced technology, a variety of parts or products can manufacture for different purposes. This technology allows accessing to detailed features, molding into any shapes or sizes, and sustainability to recycle the parts.
Plastic is essential in designing food hygienic & packaging items, automotive parts, electronic appliances, toddler toys, medical devices & instruments, furniture, building Infrastructure, and other mechanical systems.
Plastic Molding and Its Types:
Plastic Molding is a custom-made mold. These customized parts and components are visible everywhere for commercial and industrial use. A wide range of products makes using plastic materials every day.
There are a few plastic molding company processes that help in molding any kinds of parts and components, depending on the products, budget, and quality of materials & tools.
Here, the different methods of plastic molding are following:
- Compression Molding:
Compressing molding terms as forcing molding used to mold the materials by hydraulic press pressure and heat. It’s the oldest and common manufacturing process to create three-dimensional objects containing layers. Such as shoes, auto, and mechanical parts.
Both thermoplastic and thermoset materials work great with the compression method. Thermoplastic material allows the liquid to harden and shape the parts, whereas thermoset material turns the plastic pellets into pliable and soft textures. Thermoset material doesn’t allow the molten plastic to change its shape once it gets heated.
It’s the least expensive manufacturing process to produce high-quality parts. This process is efficient, and the production is cost-effective.
- Insert the plastic granules into the mold.
- The plastic pellets turn into a pliable and soft form at heating temperature.
- The heat and hydraulic press pressure apply against the mold.
- The mold ejects once the material solidifies inside the mold and gets into shape.
- The final strong parts come out from the mold.
- It requires additional work such as cutting, trimming etc
- Injection Molding:
Injection molding is the most common, recognizable, and simple manufacturing process. It mass-produces millions of small to medium parts. This process allows creating of high-quality, durable, and light-weighted parts and components.
Thermoplastic is the main material and the most usable plastic pellet in the injection molding method. There are many types of injection molding, and it can work with different materials such as Metals, glass, polymer, thermoplastic, and thermosetting plastic.
The things that use every day of life makes through the injection molding process. Most industries follow the injection molding method to create a wide range of plastic parts and components.
- Insert the plastic pellets into the hopper.
- The plastic pellets turn into liquid at a high temperature.
- The molten liquid injects into the mold by hydraulic pressure.
- The molten liquid gets cool and hardened inside the mold.
- The mold ejects from the machine
- Remove the finished product from the mold.
- Thermoforming Molding:
Thermoforming molding knows as vacuum forming or pressure forming. It’s the popular plastic molding process used to shape the thermoplastic sheet into separated parts. The parts get into the desired shape using softened thermoplastic sheets, and it’s the best fit for creating smaller volume parts.
Thermoplastic sheets are the main material used to get molded into the final product. The term Thermoforming refers to ‘Thermos’ means heat and ‘forming’ means to mold into the desired shape.
It benefits low-cost tooling and good dimensional accuracy. This process has detailed sharp features that help in making trays, food packaging items, toys, housewares, and so on.
- Place the sheet of plastic clamped into a holding device.
- Heat the plastic sheets until it gets soft and malleable.
- Mold the sheet into the desired product or stretchable into any shape and size.
- The sheet gets cools and solidifies, the excess sheet trim from the mold.
- Then, the final part removes from the mold.
- Blow Molding:
Blow molding is the process of plastic manufacturing. It creates the raw material into parison and the air blows onto the parison to create hollow-shaped or tube-liked objects. The machine blows the air across the mold cavity once the plastic gets heated and melted.
Blow molding creates hollow-shaped objects using plastics. Thermoplastic is the best fit for this process. It helps to make air-filled and balloon-like applications. Such as tubes, bottles, beverage cans, food containers, and other packaging items. The blow-molded parts or applications have two closed-end.
It’s a simple and cost-effective manufacturing process used for mass-producing a large volume of applications for the automotive industry.
- Insert the plastic granules into the hopper of the machine.
- The plastic granule gets heated and melted.
- The molten liquid extrudes into the tube between the two halves of the mold (parison), which places against the wall of the mold cavity.
- Fill the air inside the mold to expand the molten liquid to the mold surface.
- The molten liquid gets into the shape and cools.
- The parts blow up and, then, remove from the mold.