Leveraging On-Demand Production

Simply stated, on-demand manufacturing helps companies effectively manage demand volatility and gain greater control of inventory cost.

Let’s tackle that volataility issue first. This concept of manufacturing on demand helps companies navigate market volatility so that they’re not tied to massive production forecasts. When demand spikes, they can get parts quickly, avoiding the risk of lost sales opportunities because of stock outages or long lead times from off-shore vendors (see “Avoiding Logistical Logjams” below).

On-demand production that takes advantage of rapid injection molding can create a more efficient, seamless supply chain.

Next is the inventory issue. On-demand sourcing can also lower overall inventory cost and warehousing expenses for companies because they’re no longer focusing on mass producing products with high minimum order quantities (MOQs). Instead, they’re opting for on-demand production in low volumes. This approach enables companies to create a supply chain that is truly driven by customer demand, not by (and dependent on) a supplier’s lead time.

Deploying Mass Customization

As we previously reported on this blog, in “What Keeps a Buyer Up at Night,”today’s market demands are much more customized. This is moving manufacturing to become more reactive. This low-volume and high-mix ratio of products is not the supply chain of the past where mass production was the norm. Some manufacturers still focus their capabilities to mass produce products with high MOQs and long lead times. Customization is changing how manufacturing needs to react and on-demand manufacturing has the digital capacity and rapid turnaround capability to help meet those mass customization needs. In other words, one-size-fits-all mass production has given way to mass customization and product personalization. Digital manufacturing plays a key role in this game-changing transition.

Avoiding Logistical Logjams

Going off shore can increase the logistical complexity and cost of your supply chain. Your company may find it is not as adaptable to adjust to production volumes when transit time from an international factory floor to your warehouse may be measured in weeks or even months because of container ship lead time. Onshoring in these cases can solve the long litany of logistical logjams.

Mitigating On Again, Off Again Tariffs

Yet another reason OEMs are opting for onshoring instead of offshoring, are the on-again, off-again tariffs that have been front and center in the news. Indeed, this issue has only worsened, as the tariffs that were originally only on critical raw materials, may now include finished products, including cellphones, laptop computers, toys, and shoes made in China.


A recent commercial for Nissan boasts that, these days, “The most exciting tech you own is in your driveway.” That’s probably true.

Gone are the days when FM radio or CD players got car buyers excited. Today they want smart vehicles. They want voice-activated navigation. They want live-streaming media, heads-up displays, rear cameras, advanced safety features like blind-spot warnings and lane assist, and more choices than ever. It seems the auto industry has gone from Henry Ford’s “any color you want, as long as it’s black” to “whatever you want, as quickly as possible,” as consumers demand the latest technology and innovations.

At the same time, even though gas is fairly cheap right now, concerns over the environment and future oil embargoes are pushing consumers and vehicle manufacturers alike toward increased fuel-efficiency, and in many instances, no fuel at all. Battery technology is improving at an exponential rate, while vehicles are becoming lighter and more powerful. It’s an exciting time to own and operate a motor vehicle, especially when you consider that the actual act of driving may soon become an anachronism.

In this era of tech innovation and constant, rapid change, several trends are driving carmakers and other companies in the industry to shift gears. These include:

  • A growing demand volatility in the marketplace
  • A move to more customization
  • A potential changing role for automakers as they partner with tech entities
  • An even greater reliance on advanced, intelligent “upfront” design tools
Market forces have auto makers offering more customization options—placing greater strain on procurement and sourcing teams.

Facing Down Demand Volatility in the Auto Industry

Exciting or not, the wealth of vehicle options and technological advances available to consumers today has placed tremendous pressure on original equipment manufacturers (OEMs) and their suppliers. Designers face shorter development cycles than ever before. Engineers must grapple with new materials and find innovative and agile methods of manufacturing. Executives must decide the best way to chart their companies’ course, often with little visibility to the icebergs lurking beneath these uncharted manufacturing waters.

The solution is clear: just as automobiles are changing, so too must automobile manufacturers. That’s according to Rob Bodor, vice president and general manager for the Americas here at Protolabs, a global digital manufacturer that produces prototypes and end-use parts for the car industry. As Bodor explained in a recent conversation, “Automotive design cycles are much shorter than they once were. And because the industry is evolving at such a rapid pace, our customers face demand volatility, uncertainty, and must always be looking for ways to reduce risk when launching new products.”

One of the best ways for automakers to mitigate that risk, he said, is by partnering with suppliers knowledgeable in the entire spectrum of manufacturing processes, and those that are digital manufacturers. Digital manufacturing can provide quick turnaround on prototype and low-volume end-use parts at a cost lower than what’s possible in-house and provide a connected supply chain all along the manufacturing path.

For OEMs and other companies that serve the industry, these digital manufacturing processes include CNC machining, injection molding, sheet metal fabrication, and especially industrial-grade 3D printing (additive manufacturing), which has become the darling of the lightweighting community for its ability to produce novel geometries in polymers and metals alike. And although additive manufacturing (AM) is making inroads on traditional automotive-level production, it continues to have a tremendous impact on the design process by allowing multiple product iterations to be created far more quickly and cost effectively than non-digital manufacturers can provide.

An increased understanding and adoption of metal 3D printing throughout the automotive industry has led to several companies turning to additive manufacturing to build brackets, housings, bezels, and frames.

Customized Solutions: On-Demand Production, 3D Printing

AM is also the bedrock beneath mass customization, a trend that will dramatically impact the way we buy consumer goods in the future, automobiles among them. Until then, the technology is already being used to manufacture spare and aftermarket vehicle parts. Daimler Group, for example, has partnered with the consulting arm of 3D printing builder EOS, Additive Minds, on a project to “reduce the rising warehousing and tool costs caused by our growing inventory of omnibus spare parts, while also continuing to improve supply performance to our end customers,” said Ralf Anderhofstadt, head of the Center of Competence for Additive Manufacturing at Daimler Buses.

None of this surprises another of my Protolabs colleagues, AM applications engineer Eric Utley. He’s already seen a huge uptick in prototyping of brackets, headlight housings, bezels, and frames for electronics—many of them destined for self-driving cars—as well as a variety of “on-demand” service components for older vehicles. As with the Daimler example, this on-demand service eliminates the time and expense associated with tooling up a part that may have exited the production line sometime during the Reagan era.

“There’s also more mainstream production,” he said. “MINI Cooper, for instance, is using AM for mass customization of its cabin interiors. And Volkswagen is 3D printing titanium brake calipers for Bugatti, shaving several pounds off the vehicle weight and providing higher performance as well. Granted, these kinds of high-performance examples probably won’t trickle down to the passenger car market for years, but things are definitely moving in that direction.”

Further along these lines, electrification, autonomous driving, and fuel-efficiency through lightweighting continue to be significant trends in the auto industry, even though much of the low-hanging fruit has already been picked. With lightweighting, anyway, you can think of it more as apple polishing at this point. Most of the big gains have already been realized, so if a customer can shave a few ounces off a product, they’re pretty ecstatic. That said, it’s much easier than it once was to accomplish these incremental improvements. There are a variety of new high-performance polymers available as well as more capable software tools, and digital manufacturing suppliers able to leverage a broad range of manufacturing disciplines. This digitization trend makes it quite time- and cost-effective to make and test multiple iterations of a product design.

Design engineers are leveraging 3D printing to reduce component counts for faster assembly and cost savings. Engine components like manifolds and heat exchangers are good candidates for metal 3D printing.

Carmakers Team Up With Tech Companies

Another intriguing trend is the emergence of otherwise traditional automakers taking on the role of contract manufacturer, servicing startup companies unwilling or unable to invest in their own mega-factories. Fiat Chrysler, for instance, has partnered with Google spinoff Waymo to produce up to 62,000 self-driving hybrid minivans. Waymo has also recently announced a plan to team up with automakers Renault and Nissan to make its first journey outside the U.S. with a ride-hailing service that will deploy a fleet of robo-taxis in France and Japan. Furthermore, Uber has agreed to purchase 24,000 vehicles from Volvo, which the ride-sharing pioneer will then make autonomous.

Partnerships like this are big in this brave new manufacturing world. Autodesk Inc. recently collaborated with General Motors to optimize the design of a seat bracket, turning an eight-piece assembly into a stainless-steel component that is 40% lighter and 20% stronger than its predecessor, and with a simplified supply chain to boot. The software giant is also working closely with OEMs on design simulation and optimization tools, virtual and augmented reality, additive and hybrid manufacturing solutions, and other advanced software systems aimed at supporting Industry 4.0 initiatives.

“The automotive sector as well as other parts of the manufacturing industry face many of the same challenges,” said Autodesk marketing manager Clinton Perry. “These include the need for increased speed to market, design and manufacturing process optimization, quality control in the face of ever more complex products, and various types of automation to address the shortage of skilled workers. It’s the job of us and other suppliers to support automakers with products and services that address these challenges in a timely, cost-effective manner.”

Optimizing ‘Up-front’ Design Tools

However and wherever vehicles are manufactured, and regardless of the methods used to design them, it’s important to gather feedback from the people who drive them every day. This is where design tools such as the digital twin and automated quoting and design analysis systems that allow for rapid prototyping come in to play to help create the next generation of innovation in this industry.

Ian Fischer, senior technical architect at Siemens PLM Software Inc., explained that the digital twin can be thought of as a digital copy of a real-world object—an automobile, in this case—that provides vehicle designers with valuable information about their products’ performance.

In addition, Protolabs’ Bodor points out that these types of intelligent software systems are increasingly important to manufacturers of all stripes, citing Protolabs’ automated quoting and design analysis tools as another example. But he also suggested that a spirit of innovation is just as necessary, especially in the burgeoning electric and self-driving vehicle industry.

“We work with a large number of innovation-oriented customers, but it’s this segment of the automotive market in particular that seems to be the most dynamic,” he said. “They’re concerned about reducing their up-front engineering costs, they want the ability to test out design changes quickly, and they want to get to market with the lowest cost of entry possible. This is where digital manufacturing and factories of the future like ours will continue to shine.”


Applications for threaded inserts in injection-molded parts abound. They are common features that show up in a range of industries and in a variety of parts—housings, casings, electronic enclosures, appliance knobs and dials, etc. The two methods we use at Protolabs for threaded inserts, if insert molding is not an option for your design, are heat staking and ultrasonic welding, injection molding processes by which a molded thermoplastic part is locally melted to allow the insertion of another part. Both options offer tightness, durability, and aesthetics for plastic parts.

Heat staking, a process we use at Protolabs for threaded inserts, is commonly used in the manufacturing of appliances, automotive parts, and equipment in the telecom industry.

Heat staking is the process of heating threaded inserts and press fitting those inserts into part geometries, an application that relies on precise control and application of the temperature and pressure to cause the reforming of the plastic. Heat staking is commonly used in the manufacturing of appliances, automotive parts, and components and equipment for the telecom industry. At Protolabs, this option is only available for threaded inserts as we are not able to accept custom inserts at this time.

Ultrasonic welding is typically used for plastics. The process deploys high frequency ultrasonic acoustic vibrations in a localized area to press fit inserts into part geometries, creating a solid-state weld. You’ll see this process used for parts in medical devices, automotive parts, aerospace components, and electronic assemblies. Like heat staking, ultrasonic welding is currently open to threaded inserts at Protolabs, and custom inserts are not accepted. Lead time for both of these processes adds five-plus business days to your parts order.

Inputs for Heat Staking, Ultrasonic Welding

The required inputs we would need from you in order for us to provide these threaded-insert services are:

  • a CAD/part link
  • a 2D drawing noting the insert type and location
  • an assembly CAD if possible
  • the part material
  • the quantity of parts requiring inserts.

Threaded inserts are part of a wide selection of finishing options for injection molding that we offer, which provide a number of benefits: strengthening parts, improving cosmetic appearance, providing customization, and so on. Beyond threaded inserts, these include: mold texturing, custom color matching, pad printing, laser engraving, and basic assembly. These finishing options add to our capabilities as a single-supplier manufacturer with in-house tooling and part production. You can use us from start to finish for your parts: from early development and prototyping, through on-demand production of end-use parts, and secondary options and finishing.