Vacuum Casting of a Hollow Bellows Tube

Vacuum Casting for Silicone Pipes and Hollow Components

Vacuum Casting of a Hollow Bellows Tube

Vacuum Casting for Silicone Pipes and Hollow Components

INAC provides high-precision vacuum casting solutions for silicone pipes and hollow parts used in prototype and low-volume production.

By combining advanced silicone casting techniques with precision vacuum processing, we can manufacture seamless hollow pipe structures without bonding or secondary assembly.

One-Piece Hollow Silicone Pipe Manufacturing

Our vacuum casting process enables:

  • Accurate reproduction of complex hollow geometries

  • Seamless one-piece molding without joints

  • Reduced risk of air or liquid leakage

  • Improved durability for functional testing

Unlike assembled parts, vacuum-cast silicone pipes provide higher reliability and performance during evaluation and validation stages.

Applications of Vacuum-Cast Silicone Pipes

Our silicone pipe manufacturing technology is suitable for:

  • Automotive interior and functional components

  • Appliance and industrial equipment parts

  • Medical device prototyping

  • Flexible ducts and bellows structures

Why Choose INAC for Vacuum Casting?

  • Expertise in silicone casting and vacuum casting

  • Support for complex hollow pipe geometries

  • Rapid prototyping with short lead times

  • Consistent quality for low-volume production


Please feel free to contact us.

Adequate support will be provided by our experienced designers until prototype completion.

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STEP5: Quality Assurance and Precision Inspection

A quality inspection is performed. At INAC, where quality comes first, we use CMMs, gauges, and other equipment for precision checks.

STEP4: Post-Processing and Finishing

Finishing is done by removing the supports, polishing, and applying transparency treatment. It is also possible to paint and apply plating to the formed product.

STEP3: UV-Laser Print Formation (SLA Process)

Output: The product is formed by irradiating the liquid with a laser beam of UV light and laminating it. The conditions of the external environment, such as room temperature and humidity, must be maintained.

STEP2: Model Program Generation and Support Adjustment

A program for model formation is created. Depending on the shape, it may be necessary to adjust the degree of tilt and the position of the supports.

STEP1: CAD File Submission

Upload your CAD to our online quoting platform.

STEP 3: Rendering and Scene Integration

We can also handle exterior modeling and interior structure design based on illustrations. After creating the 3D models, we can create a rendering to fit a scene. We can deliver images even if we do not proceed with production.

STEP 2: Detailed Design and 3D Modeling

Once the design is determined, drawings and 3D models will be created. The structure will be examined, taking into consideration not only the external design but also functionalities such as mating and sliding.

STEP 1: Initial Design Consultation

The first step is a meeting to discuss the project. Drawings are not required for this meeting. We will create a design from a sketch based on the overall image and concept that you have in mind.

STEP5: Quality Assurance and Inspection

We perform quality inspections. At INAC, where quality comes first, we use CMMs, gauges, and other equipment for precision checks.

STEP4: Post-Casting Finishing

Vacuum casting materials are cured and then taken out of the silicone rubber mold. Then we perform finishing such as deburring and gating, and they are made into finish products.

STEP3:Material Injuction

Liquid casting material is injected into the silicone rubber mold in a vacuum environment.　

STEP2: Mold Preparation

The silicone mold is cut open into a male and female mold, and the master model is removed.

STEP1: Mold Creation

The master model is fixed to a wooden frame and silicone is poured to create a mold.