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Picture shows tie-bar-less technology from ENGEL
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  • Tie-bar-less technology

ENGEL tie-bar-less technology

Thirty years ago, our experience and passion for our work inspired us to make one of the most groundbreaking developments in our company’s history. At that time, we began to eliminate the use of tie bars, a move that represented a milestone in our industry. Tie-bar-less technology ensures an accessible mould area, even greater precision and excellent mould protection. The concept has allowed us to give our customers long-lasting success – from 1989 until the present.

Tie-bar-less technology – a story of success
Picture shows employees of ENGEL and Gerresheimer
Tie-bar-less machines for multi-cavity moulds

Proven precision: Gerresheimer relies on the unique advantages of the tie-bar-less injection moulding machine e-victory

Picture shows tie-bar-less injection moulding machine in production

Bicycle accessory manufacturer relies on tie-bar-less machines with energy-efficient drive technology.

Picture shows plate parallelism of the tie-bar-less technology

Optimum use of tie-bar-less benefits for 2-component packaging part.

Picture shows tie-bar-less injection moulding machine
Anton Kft.

Reduced unit costs thanks to tie-bar-less technology.

Picture shows tie-bar-less technology with automation

Tie-bar-less design facilitates automation.

Picture shows mould interior without tie bars

Automotive supplier chooses ENGEL tie-bar-less technology.

Picture shows application of the tie-bar-less technology

Tie-bar-less benefit saves investment costs.

Advantages of the tie-bar-less technology

Video shows ENGEL 30 years of tie-bar-less technology >
No tie-bars. Maximum scope. Greater efficiency and economy.
Reduced floor space and lower capital outlay
Picture shows injection moulding tool

The mould size, rather than the maximum clamping force, is often the key to optimising machine design. It is well worth calculating the exact amount of clamping force required, because tie-bar-less technology makes production possible with machines that rank one or two levels lower in terms of clamping force. In particular, it is the ideal solution for bulky moulds, moulds with multiple cavities, parts that do not use the entire platen surface and multicolour applications.

Outstanding energy efficiency
Picture shows ecodrive drive system

Low friction, closing pressure lock-in and electrohydraulic variable capacity pumps ensure low energy consumption. The optional ENGEL ecodrive system raises energy efficiency to the level of all-electric machines.

Ergonomic operator conditions
Picture shows worker at a tie-bar-less machine

Barrier-free access ensures comfortable working conditions, ergonomic ease of use and an unobstructed view from any angle. This creates the ideal environment for automation: faster part removal, smaller overall footprint and lower ceiling heights are the result. Plus, tie-bar pulling and complex assembly tasks for mould changing are now relics of the past, with short set-up times boosting productivity.

New dimensions – on multiple levels
Picture shows plate parallelism of the tie-bar-less technology

Tie-bar-less technology is the key to new mould dimensions – open access to the mould area allows space for large moulds or bulky core-pulls. Generously proportioned mould mounting platens can be utilised up to their edges – and often beyond. These also benefit from minimal mould wear, with the patented ENGEL Flex-Link system guaranteeing unrivalled platen parallelism even after many years of production.

The tie-bar-less clamping unit – for outstanding platen parallelism
Picture shows graphic for ideal mould weight support

Ideal mould weight support

A particular feature of tie-bar-less ENGEL injection moulding machines is their solid frame. The clamping unit is ideally supported and does not deflect even with very heavy moulds. Thanks to additionally available bearings for the moving mould half, the mould weight can be increased almost indefinitely.

Picture shows graphic of plate parallelism adjustment

Tolerances significantly lower than EUROMAP standard levels

Each tie-bar-less clamping unit is aligned precisely prior to delivery using the highly sensitive platen parallelism adjustment mechanism. Because the patented force divider is preloaded with tension, platen parallelism remains constant even when the mould is mounted.

Picture shows graphic of three-point guidance

No turning and no tilting

Thanks to three-point guidance – two precision guide rails and the central guide of the clamping unit ram – the moving platen retains its alignment even during opening and closing of the mould.

Picture shows graphic of fixed clamping plate

Designed differently with painstaking care

In contrast to other machine designs, the stationary platen is not connected with the frame at the bottom end, but instead to the frame at the rear of the platen. This way it absorbs the machine's vibrations in a symmetric manner and remains parallel to the moving platen even during acceleration and deceleration.

Picture shows graphic on top-class tool protection

Top-class mould protection

The flexible central elements (Flex-Links) make it possible for the platen parallelism to adapt perfectly to the parallelism of the mould. In this process, the moving platen is lifted out of its bearings. Therefore, when the mould is mounted correctly, a constant compression is achieved and shear forces are completely avoided, thus increasing the life span of the mould.

Picture shows graphic of even clamping force distribution

Even clamping force distribution

No matter whether the cavities are located at the centre or at the edge of the surface of the mould mounting platen, they all are subject to exactly the same level of clamping force. The patented force dividers make sure that the clamping force is evenly distributed over the entire mould fixing platen. This guarantees a consistently high part quality even in multi-cavity moulds.

The next, simple step: learn more and obtain professional advice

We will be happy to advise you personally on your individual tie-bar-less solution!

Tie-bar-less injection moulding machines from our portfolio

Picture shows tie-bar-less injection moulding machine from ENGEL

Universal tie-bar-less


The universal tie-bar-less injection moulding machine for flexible, efficient and reliable production of technical mouldings

Picture shows injection moulding machine for precision plastic parts

Precise tie-bar-less


The smart, clean, tie-bar-less machine for the production of small technical and medical technology parts

Picture shows electric injection moulding machine from ENGEL

All-electric tie-bar-less

e-motion TL

The durable, all-electric injection moulding machine for highly efficient production of parts that require consistent, clean quality

Documents for download
Picture shows victory brochure cover
Picture shows e-motion TL brochure cover
e-motion TL



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The ENGEL team will be happy to assist you with comprehensive know-how on the subject of injection moulding.

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