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Intertronics has added the Preeflow range of positive-displacement, volumetric dispensing pumps featuring ‘endless piston’ technology from Viscotec to its dosing system portfolio. Dosing systems utilising this technology impart no shear stress, are highly precise and are particularly suitable for use when dispensing adhesives containing microcapsules.

In adhesive technology, microcapsules can fulfil several functions. They can be an integral part of the control of reaction and curing processes. Some anaerobic ‘threadlocking’ adhesives contain microcapsules — after applying the adhesive to a screw, the action of screwing it into a thread bursts the capsules, releasing active materials that initiate the cure. Microcapsules can also act as spacers to achieve a predetermined minimum bondline thickness between two substrates.

Preeflow pumps will dispense or dose independent of input pressure, material viscosity and ambient temperature. The special geometry of the stator and rotor configuration works as a progressive cavity pump.

The rotor seals against the stator, forming a series of spaces or pockets, which translate along as the rotor rotates, keeping their form and volume. The pumped material is moved inside the pockets. In addition, the pockets are shaped such that they taper and overlap; the output is continuous, even and pulse free. It is therefore possible to dose very shear-sensitive and delicate materials without damaging them.

Key specifications

  • Accuracy: ± 1 per cent
  • Repeatability: more than 99 per cent

Intertronics

INTERTRONICS supplies a comprehensive range of bonding and protective materials – together with the associated consumables and equipment – to customers in high technology, high performance assembly industries – including electronics, medical device, plastics, optical, automotive, energy, defence and aerospace.

INTERTRONICS supplies a comprehensive range of bonding and protective materials – together with the associated consumables and equipment – to customers in high technology, high performance assembly industries – including electronics, medical device, plastics, optical, automotive, energy, defence and aerospace. The company supplies over 3,000 regular customers, including multinational manufacturing giants, production facilities, specialist design and development businesses, universities, training organisations and government establishments.

adhere is INTERTRONICS’ brand which encompasses its bonding, coating, sealing, encapsulating, potting, masking and gasketing materials, together with the most appropriate equipment and accessories for dispensing and curing them.

Because adhere brings together this proven range of integrated products from selected and trusted partners, INTERTRONICS’ customers have the confidence that everything will work together efficiently and cost-effectively, underpinned by the company’s experience and expert advice.

This advice is an essential element of the programme, and it ensures that customers benefit from the optimal material and process choice for the manufacture, assembly or repair of their products … safeguarding and enhancing performance and integrity and in turn, profitability and reputation.

Also key to customer success and satisfaction are the provision of process implementation and training, ongoing expert technical support and the assurance of highly competent supply chain management.

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