Efficient and Precise
Ultrasonic welding is an efficient, precise technique for joining thermoplastic parts by using high-frequency acoustic vibrations to generate heat to bond materials together without using adhesives or solvents. During the ultrasonic welding process, two plastic components are carefully aligned under pressure in a fixture. High-frequency sound waves are transmitted through a welding horn (or sonotrode), creating friction at the interface of the parts. This rapid, localised heat melts the plastic at the joining surface, and as it cools under pressure, it solidifies into a strong, seamless bond that is visually clean and structurally durable.
Accuracy and Versatility
Our commitment to advanced ultrasonic technology over the past five years has equipped us to handle a wide range of projects requiring precision in plastic welding. With ultrasonic plastic welding machines reaching up to 4000 Watts, we can accommodate diverse applications, from small, intricate parts to large, high-powered welds. Our experienced team ensures that each weld adheres to stringent quality standards, making Amtek an ideal partner for manufacturers looking to achieve consistent, cost-effective plastic bonds. Whether your project requires high-volume production or specialised, detailed applications, we have the expertise and equipment to deliver results tailored to your needs.
Precision Ultrasonic Welding
Our ultrasonic welding services offer a precise and reliable way to bond plastic injection moulded parts. This welding process creates strong, neat seams without the need for adhesives, solvents, or external heat. These durable, high-quality bonds make ultrasonic welding popular for the automotive, electronics, and medical device industries. As specialists in this efficient technique, we’ve invested in top-of-the-line ultrasonic welding equipment, including three 1500-Watt ultrasonic welding machines and a powerful 4000-Watt machine capable of welding large plastic surface areas that demand higher power. This capacity ensures we can meet varied production needs and deliver seamless, robust results.
Ultrasonic welding plastic is particularly advantageous for customers across diverse industries who require clean, strong, and fast bonding of thermoplastic parts. Sectors like automotive, medical devices, consumer electronics, and packaging all benefit from ultrasonic welding due to its ability to produce consistent, high-strength plastic welds without adhesives. This process is especially useful for applications where aesthetics and functionality are both crucial—such as in electronic housings, medical devices that demand high sanitary standards, or automotive components requiring a sleek finish and durable performance.
Compared to traditional bonding methods, like adhesives or solvents, ultrasonic welding offers a significantly faster cycle time. The whole plastic welding process typically takes only a few seconds per weld, far less than the curing or drying time associated with glue or heat-based techniques. This quick cycle time enhances productivity and enables high-volume production runs while reducing labour and materials costs. Ultrasonic welding’s speed, combined with its reliability and environmental benefits, makes it a superior solution for businesses aiming to optimise production efficiency and achieve consistent quality.
Efficient, Sustainable, and Cost-Effective Solutions
One of the key advantages of ultrasonic welding plastics is its efficiency compared to traditional bonding methods. Unlike adhesives, which require curing or drying time, ultrasonic welding operates with rapid cycle times, typically taking just seconds per weld. This translates to reduced labour costs, faster production times, and an overall more efficient manufacturing process. Additionally, ultrasonic welding is an environmentally friendly solution, as it does not require any adhesives or solvents, making it a cleaner, more sustainable option for your plastic bonding needs.
Reliable, Repeatable Results Every Time
The precision of the ultrasonic vibrations ensures that the heat generated is localised to the weld area. This prevents damage to surrounding materials and delivers a strong, consistent bond. The result is a clean, high-strength joint that enhances the integrity of the final product, making it ideal for applications where strength and appearance are both critical. Whether for high-volume production or specialised, intricate parts, our ultrasonic welding services ensure reliable, repeatable results every time, meeting your highest standards for performance and quality.
Complex Geometries
Ultrasonic welding excels in joining plastic parts with complex geometries or parts made from thin materials. Especially for components that require precise bonding in areas that are difficult to access. Its ability to work with complex shapes and fragile components, without compromising structural integrity, makes ultrasonic welding a versatile choice across a range of industries.
Options, Without Compromise
Our offline ultrasonic welding process mirrors the precision and reliability of our inline welding offering but is carried out in a dedicated area within our secondary operations department. The tooling is often configured for smaller batches or parts with unique geometries that require manual adjustments and close monitoring. This flexibility ensures that even the most complex parts can be welded with the same accuracy and strength as those processed in high-volume inline production.
Reliable, Repeatable Results Every Time
The precision of the ultrasonic vibrations ensures that the heat generated is localized to the weld area, preventing damage to surrounding materials and delivering a strong, consistent bond. The result is a clean, high-strength joint that enhances the integrity of the final product, making it ideal for applications where strength and appearance are both critical. Whether for high-volume production or specialized, intricate parts, our ultrasonic welding ensures reliable, repeatable results every time, meeting your highest standards for performance and quality.
Complex Geometries
Ultrasonic welding excels in joining parts with complex geometries or parts made from thin materials. For components that require precise bonding in areas that are difficult to access or for parts that are too delicate to handle traditional welding methods, ultrasonic welding provides an ideal solution. Its ability to work with complex shapes and fragile components without compromising structural integrity makes it a versatile choice across a range of industries
Options, Without Compromise
Our offline ultrasonic welding process mirrors the precision and reliability of our inline welding offering but is carried out in a dedicated area within our secondary operations department. The tooling is often configured for smaller batches or parts with unique geometries that require manual adjustments and close monitoring. This flexibility ensures that even the most complex parts can be welded with the same accuracy and strength as those processed in high-volume inline production.
Extensive Expertise
Bringing extensive expertise to every ultrasonic welding project with our advanced technology and dedicated team. Whether you require high-strength bonds for complex thermoplastic parts or simply need a clean, seamless weld, Amtek’s ultrasonic plastic welding process guarantees superior results.
Cost and Time
With cycle times often just seconds long, ultrasonic welding out performs traditional bonding methods, which can take longer due to curing or drying times. This rapid processing not only enhances production efficiency but also reduces labour and material costs, offering a highly cost-effective solution for businesses.
Partnerships
We work closely with our trusted UK-based ultrasonic welding partners to design and manufacture our ultrasonic weld tooling, including sonotrodes, anvils, and fixtures. While our partners handle the detailed design and manufacturing of these components, Amtek fully manages the entire process to ensure the tooling meets your specific needs. We oversee the creation to ensure optimal energy transfer and precision welding, guaranteeing high-quality results.
Optimising Component Design
The component design is a critical factor in the success of ultrasonic welding. During Amtek’s Design for Manufacture (DFM) review, we assess whether ultrasonic welding is the most suitable method for your component or assembly. Our team carefully examines the design to ensure that factors such as part geometry, material selection, and weld interface are optimised for effective ultrasonic bonding. If adjustments or recommendations are needed to enhance the weld's performance, we provide expert guidance to ensure the process is both efficient and reliable, leading to high-quality, durable plastic welds. This comprehensive review helps guarantee that ultrasonic welding delivers the best possible results.
"Ideal for joining our delicate plastic parts"
"Ideal for joining our delicate plastic parts"
"Amtek's ultrasonic welding has been essential for our electronics. Their precision and flexibility with both small and large parts have elevated product reliability"
"The efficiency and reliability of their service have drastically improved our production timelines"
Our Ultrasonic Welding FAQs
Mould Tool Manufacture
The mould tool manufacturing process is overseen by our dedicated teams to guarantee that it meets the precise requirements of each project.
From the injection moulding tool design phase through to tooling production, every step is carefully managed to ensure that the project remains on schedule and within the established budget.
We understand the importance of transparency and communication, which is why we keep our customers informed about the progress at every stage. This includes detailed updates and access to the complete schedule for the tool's build, trialling, and validation phases.
By providing this level of insight and involvement, we ensure that our customers are confident and satisfied with the injection mould tooling process, knowing that their specific needs and expectations are being met at every turn.
Tool Trial And Validation
Mould tooling is the creation of bespoke moulds that produce the parts in plastic injection moulding. The moulds consist of both moving and fixed platens which are clamped together at the beginning of the process. Molten plastic is then fed into the clamped mould at a very high pressure. Air is then pumped into the mould to ensure the plastic is uniformly covering the entire mould cavity. The plastic is then cooled and hardened within the mould before the platens release and the mould tool opens. This is a very rapid process.
Typically, these injection moulding moulds would be constructed from hardened steel due to steel’s strength and hard-wearing properties. The choice of injection mould material depends on the mass production volume. For example, steel moulds are more expensive to construct but they have a longer lifespan which offsets the initial mould tooling costs, therefore, hardened steel moulds are suitable for higher injection moulding production volumes. At Amtek we tend to steer clear of aluminium moulds as we are set up for quality high volume manufacturing.
UK Mould Tool Trial
We will work closely with you throughout the process, from initial design consultations to final injection mould tooling production. Here at Amtek we utilize UK, European and Chinese mould tooling manufacturers, ensuring flexibility and cost-effectiveness for your project.
Initial Production
While injection mould tooling can be a significant investment for businesses, our expertise and efficiency in injection mould tool design and manufacturing can help optimize production processes and minimize waste, ultimately saving clients time and money. This allows us to continue to offer competitive pricing and cost-effective solutions.
Support & Maintenance
You will be supported throughout the tooling process from initial injection mould tool design to production and beyond with tailormade scheduling, regular updates and a dedicated project team. You can be rest assured that you are working with a business who is committed to your success.
Ultrasonic welding is one part of a broad secondary operations offering:
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Ultrasonic welding — four machines, up to 4,000 W
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Heat staking
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Ultrasonic and heat insertion of threaded bushes and metal inserts
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Drilling and post-moulding machining
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Sub-assembly and full assembly, including bought-in components
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Functional and dimensional testing
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Labelling and branding
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Packaging — individual bagging, boxing, multipacks, palletised and shrink-wrapped export packs
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Warehousing
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We run four ultrasonic welding machines, supplied by Telsonic and Xfurth. Three have a 1,500 W capacity, and our newest machine delivers 4,000 W, which allows us to weld large surface areas requiring high power.
That mix is deliberate. The 1,500 W machines handle the majority of everyday welding and insertion work efficiently, while the 4,000 W machine gives us headroom for large components, high-melt-temperature engineering polymers and demanding joint geometries that would stall a smaller unit. Between them, we can cover small precision assemblies and substantial housings on the same site.
For ultrasonic welding and assembly, the driver is setup rather than the weld itself. Each assembly needs its horn and fixture set up and a weld profile established and validated, and that effort is identical whether you then weld 100 parts or 100,000.
For welding integrated into a moulding project we already run, we're flexible. The setup sits within the wider production plan, and we'll accommodate the batch size that suits your schedule.
For standalone welding and assembly work where we're not moulding the components, we assess it project by project. What makes it viable is the unit value and whether the work repeats, a short run on a higher-value assembly can work perfectly well, while a genuine one-off on a low-value part usually won't.
One point worth raising early: welding tooling is project-specific and carries a cost. Where you expect repeat business, that's recovered quickly. Where it's truly one-off, we'll tell you honestly whether ultrasonic welding is the right answer or whether another joining method suits you better.
Our ultrasonic welding capacity runs from 1,500 W to 4,000 W across four machines.
Power output determines how much energy can be delivered into the joint, and therefore how large an area you can weld in a single cycle. It's the practical limit on what a machine can achieve.
Higher power is needed for larger weld areas, a long seam or a big perimeter needs proportionally more energy; for higher-melt-temperature engineering polymers such as polycarbonate, nylon and acetal, which take more energy to reach a melt state than commodity grades.
Our 4,000 W machine means we're not limited to small parts or easy materials. If your assembly is large, or in a demanding polymer, we have the capacity to weld it properly.
All four of our ultrasonic welding machines operate at 20 kHz.
Frequency and amplitude together determine how energy reaches the joint. At 20 kHz, the lower frequency delivers higher amplitude and more power into the weld, which is why it's the industry standard for larger parts, thicker sections and tougher engineering polymers. Paired with our power range of 1,500 W to 4,000 W, it means we're well suited to substantial assemblies and demanding materials such as polycarbonate, nylon and acetal, rather than being limited to small parts in easy grades.
For the overwhelming majority of moulded plastic assemblies, 20 kHz is exactly the right tool for the job.
Process control first. Our machines weld to defined parameters, energy, time, pressure and collapse distance; and consistent parameters are the primary indicator of a consistent weld. Deviations show up immediately rather than at final inspection.
Visual inspection. Welded assemblies are checked for weld line quality, flash, marking and part alignment.
Leak and pressure testing. Where the application requires a sealed joint, we carry out leak and pressure testing to your specification.
Dimensional verification. Assemblies can be checked on our in-house CMM where post-weld dimensions are critical.
Beyond that, we build the regime around your requirements. If your product needs a specific test method, sampling frequency or documented evidence, specify it at enquiry stage and we'll incorporate it into the control plan.
