LSR/LSR combination offers added value

Watch manufacturing reinvented: the example of the LSR/LSR wristwatch illustrates the innovative concepts that emerge based on our overarching expertise. Combining multi-component injection moulding, silicone processing and automation makes it possible to produce two complete watches in one minute.

The centrepiece of the turnkey system is an electric two-component injection moulding machine from the ALLDRIVE series. Using a 2+2-cavity mould, two two-colour wrist straps are produced from liquid silicone fully automatically in a cycle time of 60 s. A linear MUTILIFT robotic system removes the moulded parts and sets them down in a cooling station and then an assembly station. Here, they are assembled into ready-to-wear wristwatches.


  • Watch strap "in one shot": LSR/LSR combination offers a high level of design freedom and pleasant tactile properties
  • "Ready-to-use" manufacturing in a single step: automated assembly within the injection moulding cycle
  • Quality in high volumes: reliable flash and waste-free operation due to coordinated high-end technology
  • Central SELOGICA control system: mould functions, injection units and automation immediately accessible
  • Efficient turnkey solution: ARBURG offers wide-ranging expertise and modular technology


Basic specifications

Cavities: 2 + 2
Part weight: 16.5 g
Material: LSR + LSR
Cycle time: 60 s


The coloured silicone wrist straps are injection moulded using an electric two-component ALLROUNDER 570 A. Two pre-moulded parts and two finished parts are produced in a cycle time of 60 s. Numerous technical details such as a regulated cooling water manifold ensure consistently high part quality.
to the electric machines

Robotic system
Assembly as a ready-to-use wristwatch takes place automatically within the injection moulding cycle. A linear MUTILIFT V 15 robotic system removes the wrist straps and sets them down in a cooling station and then an assembly station. Here, they are fitted with the watch housing and a clasp.
to the linear robotic systems

Process and know-how

Multi-component injection moulding
The two injection units are horizontally arranged in an L-configuration and can each be moved independently. The pre-moulded parts are transferred precisely and rapidly via a servo-electric rotary unit. The production sequence can be reliably optimised via the central SELOGICA control system.
to the process

Silicone injection moulding
Silicones have many interesting properties: the flexible material remains free from fatigue and discolouration and offers particularly pleasant tactile properties as well as a high degree of design freedom. Reliable processing of LSR requires technology coordinated in detail, such as cold runners in the mould for sprueless part production.
to the process

The top priority is the common goal of always finding the most cost-effective solution. This calls for interdisciplinary expertise. As a technology and systems partner we cover a particularly broad spectrum and can offer you expert support for the implementation of your requirements.
to applications technology
to turnkey consulting


Technical injection moulding
Are you looking for innovative overall concepts to make production more efficient, reduce unit costs and increase added value? As a technology and systems partner we can offer you overarching expertise and modular technology for individual turnkey solutions in order to, for example, rethink watch manufacturing.
to the industry


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