SolutionsPharmaceutical & medical
Pharmaceutical spring bottles
Spring bottles for gynecological irrigators, made by injection blow molding in medical-grade polymer without secondary processing.
Production know-how
Pharmaceutical spring bottles: how we make them
- Spring bottles made with traditional processes often show rough edges, cut marks on the bottom, poor thread size, poor sealing, uneven walls and thick seam lines.
- They also need reprocessing, which makes it hard to meet GMP requirements that the product is not touched by hand. Injection blow molding produces the finished bottle in one process.
What to send us
- Bottle drawing, sample or photo
- Volume and material
- Neck finish and closure
- Target output per hour
Three-station injection blow molding
One machine, three stations, a finished bottle
- Station 1 · 0°
Injection
The preform is injection molded on a core rod – the neck and thread of the pharmaceutical spring bottles are finished here and never change again.
- Station 2 · 120°
Blowing
The table turns 120° and air through the core rod blows the warm preform into the bottle mold. No parison, no pinch-off, no flash.
- Station 3 · 240°
Stripping
Another 120° and the finished bottle is stripped off the rod, ready to pack – no trimming and no scrap, with all three stations working at once.
Suggested machines
Typical machines for pharmaceutical & medical
A starting point – the right model depends on your bottle volume, shot weight and cavity count.
