Our endeavors and success deeply moved the customer.  He said, "You are a unique company. This project would have long been given up if it were done by anyone else."

Actually, a rubber part can be tightly bonded to a metal shell by process of vulcanization under specific temperature and pressure wihtin a certain time period by aid of curing agent.  When physic-chemical reaction reaches the status, the rubber part and metal part join together as if they were born as an integral one piece. All tiny gaps between the rubber part and the metal shell are completely removed. The effect is so good that even in deep sea under tremendous pressure(>10,000psi), water cannot permeate into the interfaces for years.

Insert molding is the core technology of making this kind of connectors. And it is the most difficult part. As shown in below pictures, melted rubber rushes into the shell through an upper runner and flows backward when it hits the bottom of mold. New rubber continues to rush-in and fill out all empty room firmly.  Then rubber vulcanizes together with the contacts and the metal shell by curing agent. In the end, all parts come together to form a connector. The key point is, rubber becomes highly fluidic at high temperature and and runs into any gap as small as 0.01mm under high pressure. If rubber goes into and plugs any hole of a female contact (1.0mm inner diameter), the connector becomes defective and all parts have to be scrapped.

In 2009, upon request from an overseas customer, Linreix boldly stepped into this field of extreme manufacture by chance. However, the way of product development was circuitous.