标题: Which Parts of a Robot Can Be 3D Printed? [打印本页] 作者: admin 时间: 2026-11-5 20:02 标题: Which Parts of a Robot Can Be 3D Printed? POLLYPOLYMER unveiled RoboFab at Formnext Shenzhen in August 2026. The question it has heard repeatedly since the launch is which parts are actually suitable for printing.
There is no fixed number. Revise a robot's structure and the number changes. Change production volume by an order of magnitude for the same type of part and the answer changes again.
This article offers a decision rule and identifies two categories that should generally stay with other processes.
01 Five Questions to Ask About a Part
1. Is it nonstandard? There is no standard part available, and tooling would not pay off.
2. Are there multiple versions? Designs change repeatedly and each version needs only a small run.
3. Is the structure complex? It has internal channels, lattices, or cavities that conventional processes cannot make.
4. Is time short? Development cycles are shorter than tooling lead times.
5. Is confidentiality required? Drawings cannot leave the factory and the entire workflow must stay in-house.
Based on our projects, three or more yes answers usually make printing viable. With one or two, calculate the cost. With none, avoid printing.
The first two questions address economics. The next two address manufacturability and timing. The fifth asks whether the job can be done behind closed doors.
Confidentiality is a workflow requirement, but it often outweighs the other four. If drawings cannot leave the plant, outsourced machining, molding, and printing all involve external production. Design, printing, and post-processing must take place internally.
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02 Three Part Categories and Three Capabilities
Earlier articles cover the individual parts in detail. Here is where each category fits.
Flexible functional parts include biomimetic muscles, soft actuators, cushioning, seals, and foot pads. Printing is difficult to replace here because performance is built into the structure. Changing lattice cell dimensions and wall thickness in the same material changes softness, rebound, and heat dissipation.
Structural parts include armor, housings, and brackets. The focus shifts from strength to shape and surface finish. Integrated fabrication eliminates joints, biomimetic curves are free of mold constraints, and a fine finish allows parts to be exposed or painted directly.
Development parts include prototypes, tooling, fixtures, and jigs. Projects need only a few unusual, highly specific parts that are slow and costly to machine. This category is easily overlooked but arises in nearly every project.
These categories are independent of volume. Flexible parts can be produced individually or in hundreds of thousands annually. Armor and housings can remain additive at scale, and POLLYPOLYMER produces midsoles at volume. What these categories share is geometry and structure that molds cannot provide.
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03 Two Categories to Keep Out of Printing
The first is a simple part made in very large volumes with strict unit cost requirements. Injection molding still offers far better unit costs and cycle times for a simple bracket produced at one million per year, because of the forming principle itself. The constraint is the combination of simplicity and volume. More complex shapes raise tooling cost and lead time, shifting the boundary.
The second is primary load-bearing structures with extreme material requirements. Metal strength, stiffness, and fatigue properties still offer advantages in many such applications. Additive manufacturing supplements existing processes in those positions.
Simple, high-volume parts favor tooling. Complex, low-volume parts are less economical to tool. The decision turns on batch size and loading, and making the boundary explicit helps teams commit where printing fits.
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04 Material and Structure Together Determine Performance
More robot functions depend on both material and structure. Once performance can be designed into the structure, manufacturing must adapt.
With tooling, the differences live in the mold. Each mold produces one shape, and changes require a new mold. Additive manufacturing puts the differences in the file, allowing every part on the same machine to differ.
In robots, each type of nonstandard part can have its own internal structure, and those structures keep changing.
That is why POLLYPOLYMER developed RoboFab. It puts design, materials, and manufacturing in one workflow. The design stage provides topology optimization guidance, the material stage offers rigid, tough, and flexible systems, and production runs through a cloud factory.
AI-translated from an article by Kuaixiong on Nanjixiong, originally published on 2026-11-05. Text and images retain the original source attribution. Read the original Chinese article
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