Injection moulding is one of the most common ways to make plastic parts. Whether it is a bottle cap, a tool handle, or a machine part, chances are it was made using this method. If you have ever wondered how this process works, this guide explains it in simple terms.

If you are looking for a trusted injection moulding company in Kolkata, understanding how things work behind the scenes helps you choose the right partner.

Step 1: The Idea and Design

Every product comes from an idea. The first step is to create a design. This design simply describes the shape, size, and details of the plastic part. Most clients usually explain what they need and designers create a sample using software meant for this purpose. The main objective is to ensure that the part will function as it is intended.

Step 2: Constructing a Sample (Prototype)

Before making thousands of pieces, a sample is made. A sample is called a prototype. Having a prototype helps both the client and manufacturer identify any flaws in the sample before investing thousands of dollars into the process. If something does not look right, changes can be made easily if a client sees the issue in the prototype stage. It will cost a lot less and is time efficient to fix an error at this stage of development.

Step 3: Constructing the Mould

The mould is similar to a metal box that shapes melted plastic. Served as a metal box, the mould is constructed of durable materials like steel so that it is serviceable a long, sustainable time worth of use. It should be noted that durability is important when processing the plastic as it will need to be dependable time and time again. A high-quality mould is the beginning of producing quality parts again and again. The best injection moulding companies in Kolkata will always be focused on producing a mould that will assure repeatable high-end production value.

Step 4: Selecting Plastic

Different parts can require different types of plastics or different cosmetic plastics. Some plastics have a soft and flexible structure, while others are more robust and heat-resistant. The type of plastic selected really depends on how the part will be utilized. At Banerjee Machine & Tools Co, they work with clients to assist in material selection. There are many things that can come in to play with plastic selection including, strength and cost, look, and product safety.

Step 5: Injection Moulding – The Main Job

This is where the real production happens. Small plastic pellets are heated until they melt. The hot liquid is injected into the mould under pressure. It cools down quickly, taking the shape of the mould. The finished part is then removed. This process is fast and can be repeated many times without losing quality.

Step 6: Checking and Cleaning

Not every part comes out perfect. After the part is made, it is checked for rough edges or defects. If something’s off, it is fixed or thrown away. Quality control makes sure the final batch is clean and ready to use. This step is taken seriously by Banerjee Machine & Tools Co, which has built its name on reliable output.

Step 7: Packaging and Delivery

When the parts are complete and ready, they are carefully packaged, printed labels are added if necessary, and delivered to the client. Delivery is just as important as manufacturing the part on time.

The process of taking your simple sketch and turning it into a finished plastic part has many steps, and each step is important. If you work with an experienced partner like Banerjee Machine & Tools Co, you will receive assistance through each of these steps, from the design stage through delivery. Using a trusted partner will make the whole process easy, reliable, and cost-effective.