What is Overmolding in injection molding?

Overmolding is a multi-step injection molding process where two or more components are molded over top of one another. Then, a second layer is molded directly on top of the first to create a single solid piece. Overmolding is commonly used to manufacture plastic parts that feature a rubber handle.

How is Overmolding done?

The overmolding process involves creating a single part using a combination of two or more plastic or elastomer materials. During the plastic overmolding process, the base layer part is molded first, then the additional plastic layer(s) are molded over and around the original part.

What is flashing when referring to injection?

Flash, also known as flashing, is excess material attached to a molded, forged, or cast product, which must usually be removed. This is typically caused by leakage of the material between the two surfaces of a mold (beginning along the parting line) or between the base material and the mold in the case of overmolding.

What are injection parameters?

The parameters of influence are injection speed 71.07%, melting temperature 23.31% and holding pressure 5.62%, respectively. The compressive strength of the product was able to withstand a pressure of up to 839 N before the product became plastic.

What’s the difference between injection molding and overmolding?

Overmolding is also called 2 times injection molding in China. Compared with the third-party material bonding, overmolding process makes the process faster and more cost-effective, it has been widely employed in plastic design. Over molding are categorized into 3 types: insert molding, double shot molding, co-injection molding.

Who is the manufacturer of overmolding in China?

(Aco Mold Co., Ltd – a good reputation company in China for custom plastic injection mold manufacturing.) Home » Wiki » What is Overmolding? What is Overmolding? Overmolding is also called 2 times injection molding in China.

How is an elastomer used in two shot molding?

Elastomers are adhesion bond, which can be mechanical locks, chemical and other methods. In order to achieve chemical adhesion, the elastomer must be sufficiently heat to melt the surface of the hard segment to achieve chemical bonding. Two-shot molding: This over molding process requires two injection molding machines.

Which is the most economical way to overmolding?

Insert molding: The most commonly used to mold soft elastomers to rigid plastics, insert molding is the most economical way to do overmolding. In the insert design, the hard segment has been separated into tools in advance, and then eject the soft materials in.