Custom Plastic Injection Molding Company

J-CAD Inc. is a global leader in mold design and plastic injection molding. We help clients from every corner of the globe in the 3D design of their product and in the manufacture of the mold required to make it. We have state-of-the-art technology to not only create the prototype but also to manufacture the refined product on a large mass production scale.

Contact us today to have your project quoted by one of our experts.

Plastic injection molding process

Plastic injection molding is the process of melting plastic granules until they are very soft then injecting the melted plastic, under high pressure, into a mold. This results in the plastic taking the exact shape of the mold. After sufficient cooling, the mold is opened releasing the solidified and hardened plastic part. The process is then repeated over and over again until the order quantity is complete.

This process is suitable for the production of a large number of parts. It is a very rapid manufacturing process. The steps followed in plastic molding include;


This is the tightening of the mold to ensure that the plastic melt does not escape when pumped into the mold under pressure.


The melted plastic is pushed from the barrel under pressure into the mold.


This is the application of pressure into the mold to ensure that all the cavities inside it are filled.


The formed plastic part is allowed to cool on its own inside the mold.

Opening of mold

The movable platen is moved away from the fixed platen to open the mold and release the molded product.


The molded product is removed from the mold with the use of air blast, a rod or a plate. J-CAD has state-of-the-art machines and highly skilled mold operators with years of experience to ensure that your products are of very high quality and are outstandingly accurate.

Our presses range from 3 to 30 ton. Our equipment is custom designed for micro-molding. This ensures maximization of parts per second hence minimizing losses and greatly controlling shot size. All of our machines are also highly mechanized to ensure that in-line inspections, insertion and removals of over molding and part removal are very cost- effective. That explains why our services are very affordable.

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We’d love to help you bring your ideas to reality. Use the chat box or contact form below to send us your project brief or contact us directly on 1-888-202-2052 and we’ll get a quote back to you in 5-10 minutes!

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Plastic Materials for Injection Molding

At J-CAD Inc. we use the following materials for plastic injection molding;

In choosing a material it is necessary to anticipate the product’s environmental conditions.

Will it be outside in the sun all day? Will it be under water most of the time?

There are many factors when it comes to choosing the correct material for your product. J – CAD Inc. will help you with selecting the correct material through our expertise in the materials available for manufacturing your products.

SAN (Styrene Acrylonitrile) – comes in clear and colored but will be transparent. Cannot be finished as a solid color. The material is very brittle and typically used in kitchen appliances as it is food grade safe. Its cost is very low. (About Styrene Acrylonitrile)

PS (Polystyrene) – very similar to SAN (Styrene Acrylonitrile). Very low cost. (About Polystyrene)

ABS (Acrylonitrile Butadiene Styrene) – very popular material found in many household items and products. It is not flexible. It can come in any color or be translucent. It can be metal plated for visual effect. Its cost is average. (About ABS)

PC (Poly-carbonate) – very strong and comes in any color with a solid or transparent finish. Higher cost, about double the price of ABS. (About Poly-carbonate)

TPE (Thermo-Plastic Elastomers) – can come in any color. This is a very flexible, rubber material. Usually used as grip on a hard plastic handle. Similar in price to PC (Polycarbonate). (About Thermo-Plastic Elastomers)

TPR (Thermo-Plastic Rubber) – can come in any color. It is a very flexible, rubber material. Usually used as gripping material on a hard plastic handle. Similar in price to PC (Polycarbonate) but less expensive than TPE(About Thermo-Plastic Rubber).

TPU (Thermo-Plastic Urethane) – can come in any color. It is a very flexible, rubber material. Also usually used for gripping applications on a hard plastic handle. Similar in price to PC (polycarbonate) but less expensive than TPE. (About Thermo-Plastic Urethane).

PA6 or PA66 (Nylon 6) – is a nylon material mixed with fiberglass which makes it very strong. It comes in any color. It can be mixed with fiberglass at a mixture of 5-50% glass. The final product gets stronger with more glass but also gets more brittle. (About Nylon 6)

PP (Polypropylene) – can be finished in any color or can be translucent. Cannot be fully clear. It is more flexible than ABS and less costly. (About Polypropylene)

PE (Polyethylene) – very similar to Polypropylene. (About Polyethylene)

POM (Polyoxymethylene) – very wear resistant and strong. Used for plastic gears and other parts in friction as it has good friction resistance. Higher cost. (About Polyoxymethylene)

PEI (Polyetherimide) – used for aerospace parts and high precision and strength. It is very expensive and can withstand high temperatures up to 180° C / 350° F. (About Polyetherimide)