Office scissors

Individualisation of moulded parts

Based on the example of office scissors, the flexible individualisation of plastic products through the interaction between injection moulding using an ALLROUNDER and ARBURG Plastic Freeforming (APF) with the freeformer will be demonstrated. The application also represents an illustration of Industry 4.0.

First of all, at the injection moulding station, different scissor versions can be selected. In order to enable flexible and rapid product changes, human and robot work hand-in-hand. An electric ALLROUNDER moulds on the scissor handles, before a DMC code is applied via laser. The freeformer then adds individualised lettering onto the scissors. The process and quality data is recorded via the ARBURG host computer system ALS and transmitted to a web server. The corresponding web page can be called up using mobile devices by means of the DMC code.

Highlights

  • Flexible production of plastic parts: small unit volumes down to one-off designs
  • Individualisation of mass-produced parts Injection moulding combined with additive manufacturing
  • Human/robot cooperation: interactive operation for cost-effective automation
  • Industry 4.0: ARBURG host computer system ALS enables networked, traceable and transparent production

Downloads

Brochure: Industry 4.0 (PDF - 0.4 MB)

Basic specifications

Office scissors
Cavities: 1 + 1
Part weight: 24 g
Material: PP
Cycle time: 60 s
Construction time of lettering: approx. 2 min

Technology

Machine
Production is started through the SELOGICA machine control system via smart card In the following cycle, an electric ALLROUNDER 370 E overmoulds the selected scissor blank. Electric drives and the precise configuration of all components improve energy efficiency, precision and cycle time.
to the electric machines

Robotic system
The scissor blank is inserted manually, directly into the gripper in order to dispense with complex feed systems. The linear MULTILIFT V robotic system, featuring protection via a light curtain, transfers the insert to the mould and moves the finished scissors to the laser station.
to the linear robotic systems

Processes

Overmoulding inserts
The scissor blanks (round or pointed tip options) inserted into the mould are overmoulded with PP handles. The 1+1-cavity mould features a version for left and for right-handed users. The part weight is 24 g and the total cycle time is 60 s.
to the process

ARBURG Plastic Freeforming (APF)
The freeformer additively applies three-dimensional, personalised lettering. In this manner, mass-produced parts can be individualised without a mould using the APF process. At a layer height of 0.21 mm, a construction time of only around 2 min is achieved.
to the process

Industry

Technical injection moulding
High-precision parts for a wide variety of applications can be produced with technical injection moulding. By combining injection moulding with additive manufacturing, it is possible to individualise such mass-produced items in an additional step.
to the industry

Partners

MouldNovapax
AutomationKiki
Laser stationTrumpf
Camera systemFuchs