Tips for Better Perfect Binding - In-plant Impressions

Tips for Better Quality Binding

Smack the backbone of the glued book down on a flat surface directly after coming out of the nipper. This is a binder’s trick that has been used since time immemorial.

—David Spiel, Spiel Associates

When binding problem stocks, raise the notching blades a bit. This will help with glue penetration, especially if your perfect binder does not mill or rough.

—David Spiel, Spiel Associates

Check the quality of the spine and side glue layer by running a book without attaching the cover during setup.

—Harry Nguyen, Duplo USA

If adhesive equipment (melters and applicators) requires compressed air, proper air regulation is necessary. If air pressure drops, the result could be slower reacting applicator valves and inconsistency in adhesive placement.

—Brian Burkley, Nordson

The height of the clamp should be adjustable to the amount you want to mill off the spine. For single sheets, you may want to grind off 1 mm, just notch the spine for greater glue area, or mill off 3 mm for mixed media between single sheets and signatures to expose each sheet in the book to the adhesive.

—Steve Calov, Heidelberg

Decrease the speed of the book block as the book thickness increases to get the best milling quality.

—Harry Nguyen, Duplo USA

To achieve the strongest bond when applying PUR using a slot nozzle, ensure that the spine is as clean as possible, level, and with the sharp milling/spine prep. This is good practice whether using EVA or PUR adhesive, but more critical with PUR.

—Brian Burkley, Nordson

Turn off hot melt systems when not in use to extend life of both the adhesive and equipment.

—Greg Earle, Nordson

Set the glue pot temperature according to the glue manufacturer’s recommendation for best results and longer glue life. Low glue temperature will affect adhesion strength while high glue temperature will shorten usable life of the EVA hot melt in the glue pot. The coloration of the EVA hot melt is a good indicator of when to change it out. The hot melt will darken with use.

—Harry Nguyen, Duplo USA

Before You Start

• Look at your current and future needs when deciding which binder to purchase. Ask yourself: Are my jobs mainly short runs with varying book thickness, or longer runs with fixed book block thickness? What is my current volume? What will my volume be in the future? —Harry Nguyen, Duplo USA

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