Vacuum casting

Vacuum Casting

Vacuum casting option for small lot production

We will support you from the development stage.

We can handle sizes up to about the size of the front grill of a car. Most have one color, but we have the technology that allows multicolor casting such as two colors and three colors.


Vacuum casting is a method in which a master model is used to create a mold from silicone rubber, and a resin material is poured into the rubber mold to manufacture parts.Unlike a mold for injection molding, if you have a master model, you can manufacture dozens of parts in a short period of time.
In addition, since there are many types of casting materials available, you can use the same silicone rubber mold to make prototypes of various materials. Different material insert casting is also possible.


・ABS equivalent・PP equivalent・ Elastomer equivalent

・ Acrylic equivalent・ silicon・Heat resistant resin

・ flame retardant resin  ★ Glass fiber can also be added


In-house, we can manufacture vacuum casting products faster by producing master models by stereolithography that can produce prototype models in a short time. Please try vacuum casting, which has high cost performance, when you need to manufacture several pieces.


Please feel free to contact us.
Adequate support will be provided by our experienced designers until prototype completion.

Multicolor casting

Colored casting

Transparent casting

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: Verification

We have an assortment of manual and CNC coordinate measuring machines, roughness measuring machines, and various other measuring instruments. We are committed to quality, and there’s no better proof of that than the fact that when many of our customers buy INAC’s services and experience the quality, they come back again to place repeat orders.

STEP4: Decorating, plating, printing

Paint and plating treatments can be added to processed products. Few companies are able to handle the entire process up to and including decoration. The ability to deliver everything in a short period of time speeds up product development. Colors can even be reproduced exactly as desired, as in-house color mixing is can be done.

STEP3: Creation

We create things using a variety of manufacturing methods, including cutting, 3D printers, casting, aluminum molds, and lathing. Sometimes, additional work is performed at a machining center to improve the precision of the 3D printed products. Manufacturing possibilities are expanded by making full use of each machine through this process. Or we can meet customer needs by makinng full use of each machine through this process.

STEP2: Proposal for the method of production based on the meeting

In addition to the intended application and operating environment, the delivery time, quality requirements, and target cost are also taken into account when considering production methods. Our sales staff, who are well versed in prototyping with knowledge on which materials and what processing methods to use, will propose the most appropriate manufacturing method.

STEP1: Reception of drawings or data, and meeting on applications and use cases

We will hold a meeting with you to discuss the details. For example, if the purpose of the prototype is to observe the inside of the equipment, we’ll need to gather enough detail to determine things like if any liquids will pass through, what temperatures can be expected, whether there should be any leaks, etc. We consider this meeting to be very important for the process because determining the optimal production method will depend greatly on the intended application among other factors.