Plastic Molding Guide

Plastic molding products' are wild spread can be seen all over. The fundamental concept in plastic molding is placing molten liquid plastic into an all-set shaped mold

Plastic molding products’ are wild spread can be seen all over. Few examples are plastic tubes, containers, toys, protective caps, grips, kitchen utensils, bottles, cases, devices, and a lot more.

The fundamental concept in plastic molding is placing molten liquid plastic into an all-set shaped mold, for instance, the mold of a container. After the cooling process, the mold will open, revealing the plastic container.

Plastic molding can also custom-mold a wide range of plastic items consisting of garden pots, office trays and boxes, cabinets, barriers, barricades, and traffic signs and screens for product and marketing promos.

You should initially understand the various procedures if you plan to go into a plastic molding organization. Select from a plastic molding procedure that fits your spending plan, your knowledge, and your resources. Here are the standard meanings of various techniques of plastic molding.

Types of Plastic Molding Processes:

– Injection Molding

injection molding diagram
injection molding diagram

By ariel cornejo – Own work, CC BY-SA 4.0,

In Injection Molding, solid granulated plastic is melted and forced into a mold cavity using an injection molding screw. Once cooled, the mold can open. This plastic molding procedure is commonly used in mass-production, fast and efficient production of uniform objects. Injection molding equipment was made back in the 1930s. This process is utilized to standardize toys, cooking area utensils, bottle caps, and mobile phone stands, to name a few.

– Rotational Molding

Rotational molding Carousel equipment in a production enviromental

By Stéphan Courtois – Own work, CC BY-SA 3.0,

In this quite simple process, a hollow mold is filled with powdered plastic. The mold starts turning bi-axially as well as is transferred right into a stove. The resin spread onto the mold walls. The mold is cooled down until the plastic resin hardens right into the wanted shape. This type of plastic molding offers a high cost per piece at low tooling costs.

– Compression Molding

Compression Molding diagram

By ariel cornejo – Own work, CC BY-SA 4.0,

In this type of plastic molding, heat and pressure are used. The raw material is pressed between two heated mold cavities. The parts formed are then air-cooled. The costs of devices used for compression molding are moderate. Compression molding typically uses vertical presses rather than the horizontal presses utilized for injection and blow molding.

– Gas-Assist Injection Molding


By Esquema_Moldeo_por_inyeccion_asistida_por_gas.jpg: PCarballedaderivative work: Suvroc – This file was derived from:  Esquema Moldeo por inyeccion asistida por gas.jpg:, CC0,

Also known as gas injection molding is used to produce plastic parts with hollow interiors. A partial shot of plastic is then followed by high-pressure gas to fill the mold cavity with plastic.

– Structural Foam Molding


Structural foam molding is a plastic molding procedure generally used for parts that need thicker walls than standard injection molding. A thin plastic skin types and solidifies in the mold wall.

– Blow molding


By Basant Nayak – Own work, CC BY-SA 4.0,

Blow molding resembles injection molding other than that hot liquid plastic pours out of a barrel vertically in a molten tube. The mold closes on it and requires it external to comply with the inside shape of the mold. The hollow part is formed when it is cooled. Examples of blow molding items are containers, tubes, and bottles.

The type of equipment needed in setting up a blow molding business is relatively more significant than injection molding.

– Film Insert Molding

Thermoformable PET for Film Insert Moulding

Thermoformable PET for Film Insert Moulding

This plastic molding method embeds an image underneath the surface area of a molded part. A material as film or fabric is placed into a mold. Plastic is then injected.

– Thermoforming


By LaurensvanLieshout – Own work, CC BY-SA 3.0,

In this plastic molding procedure, sheets of pre-extruded stiff plastics are horizontally warmed and sucked down into hollow one-piece tools. When the hot plastic solidifies, its shape complies with that of the mold.

Tooling costs usually are low, and piece prices vary on the machinery.

Plastic molding is a technical process. It demands experts in this kind of manufacturing business for it to be competitive in the market. For that reason, an organized and really scientific study needs to be first made before going into this investment.

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