【165】Medical Device Housing Stuck for Four Months Fengchuang Delivers in 30 Days

【165】Medical Device Housing Stuck for Four Months – Feng chuang Delivers in 30 Days

Keywords: Fengchuang Plastics, medical devices, injection molding, sample delivery

Mr. Wang hung up the phone and tossed it onto the desk. That was the fourth call of the day chasing delivery. His customer's product registration had already been delayed by two months because of the housing.

Mr. Wang's company makes home-use ventilators. The housing for the new model needed to meet three requirements: biocompatibility, disinfection resistance, and aging resistance. The previous injection molding shop ran five rounds of samples, each with a different problem. First round – sink marks. Second – warpage. Third – color mismatch. Fourth – assembly interference. Fifth – they simply said, "We can't do it." Four months had passed, and the samples still weren't right.

The regulatory team was pushing hard every day, warning that if they didn't get合格的 samples soon, the clinical testing window would be missed. Mr. Wang began to doubt whether he had chosen the wrong supplier. He even considered redesigning the housing to simplify the complex geometry.

Then a friend recommended Fengchuang Plastics, saying they had supplied to AVIC and had extensive experience in medical devices. Mr. Wang sent over the drawings, half doubtful. Three days later, a Fengchuang engineer walked into his office carrying a mold flow analysis chart. Pointing to the red areas on the chart, he said, "Here the wall thickness is 2.5 mm, and here it's 0.8 mm – a threefold difference. The cooling rates don't match. Warpage is inevitable."

Fengchuang's solution was not to change the product, but to change the mold. They added conformal cooling channels in the thick-wall areas so that the cooling rate would同步 with the thin-wall areas. They also changed the gate from a single point to a three-point sequential valve system, allowing the melt to fill from three directions simultaneously. After the presentation, Mr. Wang said, "None of the previous shops ever told me any of this."

Twenty-eight days later, the first batch of samples was delivered. Mr. Wang sent the samples to a third-party lab for testing – biocompatibility, disinfection resistance, and aging resistance all passed. The regulatory team could finally move forward with clinical testing. Mr. Wang sent a message: "Fengchuang saved this project."

Today, that ventilator has obtained its registration certificate, with a monthly production of 5,000 units. Mr. Wang says, "For any new project mold opening in the future, I'm only going to Fengchuang."

Stuck on a medical device sample? Come to Fengchuang. What couldn't be done in four months, we get done in one.