VACUUM SLEEVES

How to Select the Proper Size Vacuum Sleeve
There are simple measurements to consider when selecting a vacuum sleeve for your application.

Measure the longest dimension of the pieces which are to pass through the vacuum sleeve and add approximately 1/8". When determining the longest dimension, be sure to consider the stock thickness.Select a vacuum sleeve having an "A" diameter equal to or greater than this dimension.

Vacuum Sleeve Chart - 12 sizes available with vacuum passages ("A" Diameter) from 3/16" to 2.0"

Vacuum was measured in inches of mercury. For optimum air flow, an operating pressure of 60 psi (max) is recommended.
The standard VS110 through VS940 Sleeves are made from steel. Standard VS1250 through VS2000 are made from aluminum.

To Properly Install Vacuum Sleeves, Follow These
Machining Specifications:
• Break all sharp edges
• "B" and "D" diameters to have smooth surface finish.
• "B" diameter to be concentric with "D" diameter within .005 T.I.R.
The inside diameter of hoses, tubings and fittings of air supply line must be as large as the "F" diameter shown in the drawing below.

Machining Specifications

VT VACUUM TRANSDUCER SERIES with FUNNELS and CAPS

TDRH VACUUM CAP UNITS

APPLICATION EXAMPLES

• Determining "A" Diameter

Lamination Die with Multiple Scrap Openings Requires the Installation of Two Funnel Units.

For Application #1, the longest dimension for the ten slugs is very small. However, the total area of the ten slugs equals 1.18 in2. The Vacuum Transducer Funnel selected has an "A" diameter of 1 1/4" and an area of 1.22.

For Application #2, the total area equals .645 in2. the size unit required was a VT940 having an "A" diameter of .937" with an area of .690.

Strip Stock Layout and Die Portion Which Requires Vacuum to Prevent Four Notches and Two Oblong Slugs from Pulling Up with the Punches.

Since it would be impractical to install a separate Vacuum Sleeve under each die opening, a Vacuum Transducer and Funnel Unit was attached to the bottom of the die bed to accomodate all six openings in one unit.

Since the total area of the four triangular die openings and two oblong die openings equals .224 in2. A VT560 F2 Funnel Unit was selected which provides a total area of .248 in2.

APPLICATION EXAMPLES

• Removing Shavings in an Upward Direction
• Vacuum Removal of Finished Parts off of the Die Surface
• Horizontal Press Set Up

VT Vacuum Transducer & Cap Unit Removes Finished Part from Surface of the Die

The Problem: To remove the finished part at the final cut-off station. The normal procedure is to used compressed air to blow this part into a container. However, they coould fly in various directions and often do not leave the die area and interfere with the strip stock.

The Solution: The VT Cap Unit and adapter brings the vacuum close to the finished part and the flow of atomspheric air picks up each part as it is cut off and removes it from the die area.

Vacuum Increases Uses of Horizontal Press Set-Up
It was required to fabricate miniature retainer rings from .003 stainless steel and prevent nicking, bending of marking of the part. If run in a vertical press, the retainer would have to be blown off causing marking or nicking. Using a horizontal press, the retainer blank falls free due to gravity and helped by a Vacuum Unit providing very low vacuum flow and a slight movement of atmospheric air downward into the funnel unit. This method provides unmarked flat retainer blanks.

This design requires the removal of the center slug that needed to be pierced in a horizontal diretion to prevent the slug from falling onto the die.