Multi-Color Plastic Cable with Overmold Process

Overmolding is also called 2 times injection molding. Compared to assembling or gluing, overmolding  makes the process faster and more cost-effective. It has been widely used in plastic parts design. This manufacturing process is also used to make a water and air tight assembly for electronic PCB.

Over-molding is categorized into 3 types: insert molding, double shot molding, co-injection molding.

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 inject the soft materials in.

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.

Two-shot molding:

This over molding process requires two injection molding machines . In case of only 1 machine, 2 molding steps must be done on the same machine. Hard segment is injected first, and then led by the elastomeric mold to the injection molding machine. Next step finished the process of hard segment into the elastomer injection. Heat substrate is usually semi-solid, gel state.

Co-injection molding:

In co-injection molding, while the hard substrate and the elastomer is injected into the same mold, compatibility between materials is essential, it must be carefully controlled.

Co-Injection is very expensive and difficult to control. It is used least comparing with other 2 method. The hard and soft substrates are in a fully molten state. Therefore it provides the best bonding between soft and hard parts, the molded parts quality is also the best.

At Davantech we control this production technique very well and here is what we can do for you :
 

• Injection of plastic around a metal contact (male or female) to make connectors or terminal blocks
• Softer plastic around electrical cable to make cable splits, connectors, grommets
• Plastic around PCB (printed circuit board) to make encapsulated or watertight electronics
• Soft or hard around metal parts to make a solid assembly between metal and plastic

Over molding of electrical cables and metal contacts (connectors)

Production of electrical cables and connectors where we encapsulate the wires and soldered or shrinked metal contacts with plastic.

The over molding of soft plastic or TPE/TPR bushings and glands over an electric wire.

For this injection technique we us our vertical injection machines of 20, 25 and 45 tons.

Over molding of printed circuits

Even printed circuit boards with electronic components will be over molded. This to ensure water tightness.



 

Over molding of plastic on metal

Some metal and plastic parts require a solid assembling. Therefore it can be a benefit to for a plastic shape onto a metal part. We can mold soft as well as hard plastic. This technique will ensure a tolerance free assembly where the 2 components cant move or rotate.

Custom manufacturing and engineering solutions in China

Davantech is a full-service manufacturer and provides custom manufacturing solutions in China, to clients worldwide.  We can manufacture custom products and offer a wide variety of options to engineer and produce your products. We can support high volumes and short lead times.

From Raw material to Finished products

 One Stop Partner to manufacture your product in China !

Certifications we were approved

Our Advantage:

(1)Our engineers come from Europe , our international sales have more than 10 years experience, so we offer you professional service.

(2)Small quantity trial order is welcome.

(3)Products with patents, unique design and beautiful appreance. Removalbe body design will be saved a lot of your cost and time.

(4)Shipping forwarders partner save your freight charges.

(5)3 lines of assembling to make sure your lead time.

(6)Samples for free.


FAQ

Q1.Where is your factory?
The headquarter base in DongGuan, we have offices in Belgium and France.