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DEK pro-flow

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DEK pro-flow | 12 February, 2007

Anybody out there using this with lead free paste and willing to share the good and bad? I used them a few years back and had some issues (wasted paste, paste bleeding out around the skids). Just curious if DEK has addressed those problems and how current users feel. thanks in advance, pr

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DEK Answer Guy (PR Dept)


DEK pro-flow | 12 February, 2007

Thanks for inquiring about DEK and/or DEK products PR! The arrival of DirEKt Imaging with DEK's creative ProFlow� applications technology has evolved screen printing into a new domain.

Since we introduced ProFlow� DirEKt Imaging in 1997, hundreds of electronics manufacturers around the world have migrated from squeegees to enclosed printhead technology � and discovered convincing cost savings and process benefits. Not only does DirEKt Imaging dramatically improve the efficiency of the surface mount pre-placement process, it also delivers environmental benefits and exceptional ease-of-use for operators.

Over 1500 individual ProFlow� systems have been installed by DEK customers in all corners of the globe, representing around 80% of all enclosed printheads currently in action world-wide.

The ProFlow� product range includes new and exciting options to satisfy a wide variety of process and production requirements.

Discover how ProFlow� DirEKt Imaging delivers a more cost-effective process, offering enhanced throughput, higher yield, consumables savings and improved efficiency.

Become a registered user of to access free downloads of additional ProFlow� specific information: (Downloads can be found under Process -> Technical Papers)

-ProFlow� upgrades (MPU's). -Paste Low Optimisation -Adjustment of the Print Carriage to ensure Squareness to the Stencil -Replacement of Hinge Pin Assembly -Conversion of ProFlow� to Horizontal Mount -ProFlow� Guides for Operators and Engineers. -ProFlow� Process - An Introduction to Via-Fill & Paste Evaluation Test. -ProFlow� Refill Procedure for Recharge & Cassette.

Come and see DEK at APEX on booth #2047.

A consistent focus on product advancement and process solutions have resulted in several creative technologies and lead-free printing solutions, including:

The VectorGuard stencil system, Galaxy and Europa Micron-class printers for advanced SMT and semiconductor applications, RTC (Rapid Transit Conveyor) to enable a 4-second cycle time, Interactiv� machine support and ProFlow� DirEKt imaging for paste, adhesive PumpPrinting� and optimal lead-free printing.

All of these latest innovations, as well as DEK�s full line of automatic and semi-automatic screen printers, sophisticated stencil technology and consumables will be on display.

DEK is pleased to announce that both Cyclone and 3D Find-a-Part have been selected for submission to the Innovative Technology Center (ITC) IPC Printed Circuits Expo, APEX and the Designers Summit. We look forward to seeing you there!

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DEK pro-flow | 15 February, 2007


I don't believe there is a differance in performance of the ProFlow head between "Leaded" and "Lead-Free" paste.

We have been using the ProFlow for about 4 years now with leaded paste. Yes, some issues to overcome. Mostly in the brand/type of paste you use AND ya gotta use it alot or the paste will harden in the ProFlow head.

We would never go back to squeeges !!!!

Paul M.

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DEK pro-flow | 16 February, 2007

DEKs are the best. They blow all others away. Sure the Pro-Flow does tend to waste paste, and you do get some blow by, but once you realize you have the best screen printer available, you can live with trivial things like this. Squeegees are for idiots!

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John S.


DEK pro-flow | 16 February, 2007

We conducted a DOE to establish our print setup parameters. These will of course depend on the paste you select, and the thing just runs. The techs store the head in a ziplock bag when not in use. When they need to run, they just attach the head, knead the paste 3-4 times, and off they go. Every couple of weeks, they disassemble and clean the head just to keep it in good shape. We also use it for adhesive printing with the pump print stencils. Your parameters will be very different, but it beats dispensing by a long shot. John S.

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DEK Answer Guy


DEK pro-flow | 16 February, 2007

Hello PR,

PumpPrint� technologies enable high throughput adhesive deposition using a screen printing platform. Careful selection of stencil material, and informed study of the design of apertures and other stencil features, enables a wide range of adhesive patterns to be successfully deposited using a standard screen printer. New techniques, including ProFlow� DirEKt Imaging, enhance the speed, repeatability and flexibility of PumpPrint� to far outstrip the capabilities of current adhesive dispensers.

Using A Screen Printer To Deposit Adhesives enhances throughput and gives manufacturers the flexibility to re-deploy existing printing resources, instead of purchasing dedicated adhesive dispensing equipment. Since the process is completed in a single stroke, the cycle time is constant and independent of the number of adhesive deposits. This provides greater control over line utilisation and product scheduling.

Stencils are made from an acrylic material that is easily and accurately machined. The stencils can be mounted within a standard mesh mounted frame using polyester mesh as normally applied to metal mounted masks, or a frame tensioning system can be used with PumpPrint. They are available in standard thicknesses from 1.0mm to 3.0mm (up to 8mm for special applications) to suit any assembly, allowing deposit heights from 75�m to1mm.

Stencil Apertures Act Like Individual Nozzles, allowing deposit height to be controlled by the aperture diameter. Stencils are designed to suit a comprehensive range of components from 0603 passives to large QFPs. Bottom-side routing allows the stencil to clear underside-mounted components and through-hole leads that have been cut & clinched. This extra flexibility further enhances the strength of PumpPrinting over dispensing.

Adhesive printing without ProFlow� DirEKt Imaging is accomplished using squeegees with a profile developed specifically for the process. Using ProFlow� DirEKt Imaging to PumpPrint� adhesives makes setting up quicker and easier, allows a faster print speed to be maintained, and isolates the adhesive from ambient conditions. Also the PumpPrint� Process Is Used Successfully With Solder Paste to deposit paste around through-hole component leads for extrusive reflow, enabling wave soldering of PTH and mixed technology assemblies to be eliminated. Similarly solder paste can be printed into the base of packages several milimetres deep.

Faster, more flexible and more cost-efficient than dispensing.

Nozzle changeovers eliminated.

Re-deploy existing printing resources.

Stencils generated using Gerber, HPGL, DXF and ODB++ or DEK can scan direct from a PCB.

Lightweight, solvent resistant stencils.

Thicknesses 1.0mm, 1.5mm, 2.0mm, 3.0mm (up to 8mm for special applications).

Deposit heights from 75�m to 1mm.

Compatible with component sizes from 0603 to large QFPs.

Underside routing clears components , cut and clinched leads, paste and solder mask.

We'll see you at the APEX show!

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DEK pro-flow | 16 February, 2007

Thanks for the replies guys. I hope I didn't throw ya'll off with the "lead free" remark but I just wanted to be as clear as possible, as to what we are running. So far it sounds like it's worth looking into.

Thanks again, pr

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DEK pro-flow | 16 February, 2007

Amen to that!

You wanna be a window washer, then use squeegees!

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DEK pro-flow | 16 February, 2007

Word up Brokeback Chuck. DEK finny kicks back like Jay-Z with a Bud. Ain�t no solid b-team snoodling!



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DEK pro-flow | 19 February, 2007

So true - HA HA!

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Metcal soldering rework

 Reflow System