Description
Moliseal makes custom inflatable rubber bladders in Shanghai, China for controlled expansion, clamping, positioning and temporary sealing. Send the cavity drawing, a sample or photos to discuss the required shape and air connection.
A controlled volume of air expands the flexible bladder until it reaches the surrounding surface or produces the required movement.
The cavity, restraint and contact surface determine the working shape, so both the free and installed conditions must be included in the design review.
Custom rubber bladders can support temporary sealing, clamping, positioning, lifting or forming tasks where rigid actuation is difficult to package.
The correct design depends on required stroke, contact load, available cavity, cycle frequency, temperature and fluid exposure.
Flexible components for controlled movement
Inflatable bladders convert low-volume air input into controlled expansion. They can support sealing, lifting, clamping or shape-forming tasks where a rigid actuator would be difficult to package.
Define the restrained and free shape
The bladder shape when free is only part of the design. The surrounding cavity, contact surface and restraint determine the working geometry. Drawings should show both available space and the position the bladder must reach when inflated.
Application review points
Share the following information before material and construction are selected.
- Working stroke or expansion
- Contact load or sealing function
- Cycle frequency
- Temperature and fluid exposure
- Available valve space and air supply
Custom manufacturing and international RFQs
Our Shanghai team can review a customer's drawing, sample or clear photos for a made-to-order inflatable bladder. We compare the free shape with the restrained cavity so the proposed construction addresses the actual contact and movement required.
Include the destination country, quantity and requested delivery date. Production and shipping timing is confirmed with the chosen geometry, material and prototype requirements in the quotation.
Frequently asked questions
What information is needed to design a custom inflatable rubber bladder?
Provide drawings of the free and restrained spaces, required movement, contact area, load or sealing objective, cycle frequency, temperature, medium, available air connection and expected quantity.
Why is the surrounding cavity important?
The cavity restrains expansion and determines the working shape, contact area and load path. A bladder that looks suitable when free may behave differently when installed, so both conditions must be reviewed.
How is the operating pressure selected for an inflatable bladder?
Pressure is selected from the geometry, wall construction, restraint, required movement and contact load. It should be established by testing the prototype in the actual or representative cavity rather than copied from an unrelated bladder.
Can the air connection be moved to another position?
It can usually be reviewed, provided the location allows assembly and service access without creating a sharp bend, interference point or highly stressed local area.
Can you make an inflatable bladder from a sample or photos?
Yes. A representative sample and photos help us understand the shape and connection, but please also provide the cavity dimensions, working movement, contact load and operating conditions before the final construction is agreed.
