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THINSWITCH LIMIT SWITCHES

VERIFIES EJECTOR PLATE RETURN

GENERAL DESCRIPTION
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Thinswitch Limit Switches are specially designed to verify ejector plate return before
permitting the mold to close in injection molding machines. These small switches are
thin enough to fit inside the ejector housing. They can also be used for core, slides, or
anyplace space is limited. All models use the same mounting hole locations.
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The Thinswitch Limit Switches have been tested for reliability over 10 million cycles
without failure. Two switches can be used in series for larger molds to ensure the
ejector plate return, preventing costly mold damage.
SPECIFICATIONS
Liquid-Resistant Electrical
Model 250VAC ......................... 5 Amps resistive, 4 Amps inductive
Original Model 28VDC (sea level)......... 5 Amps resistive, 4 Amps inductive
Switching..................................................................... SPDT
Operating Temperature
Standard Model T-222’s .............. 175°F max. (79.4°C max.)
U.S. Patents:
No. 5,446,252 High Temp Model HT-291’s ......... 250°F max. (121°C max.)
No. 6,982,392
Rated Current vs. Steel Temperature
FEATURES AND BENEFITS T-222 HT-291
• Over 10 million cycle life provides long dependable Amps °F °C Amps °F °C
service. 5.0 85 29.4 5.0 100 37.7
• 175°F (79.4°C) standard temperature rating allows 4.0 120 49.0 4.5 155 68.3
installation into most molding applications. 3.0 155 68.3 4.0 210 98.8
• 250°F (121°C) high temperature unit is available for 2.0 175 79.4 3.5 250 121.1
higher temperature needs.
• Adjustable operating point allows actuation between MATERIALS
0.187” and 0.250” from the base. Body .......................................... Fiberglass-reinforced nylon
• 3/16” thick design fits snugly behind the ejector plate in Spring (Original model) ................................. Stainless Steel
the space provided by the rest buttons. Dome (Liquid-Resistant model) ...................... Polyurethane
• Stripped and tinned 6 ft. wire leads make the switch Back Cover .................................................... Polyester Film
ready to install without modification. Wire Leads ... 22 ga. stranded, 3-conductor, shielded cable,
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• Included mounting hardware installs the Thinswitch limit 6 ft. (1.8m) long, ends stripped and tinned
switch easily.
Thinswitch ®
Original Thinswitch Limit Switch Liquid-Resistant Limit Switch
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Thinswitch ®
Schematic
Diagram
Normally
Closed
(red)
Common
(white) Normally
Open
(black)
Schematic Diagram
SP222

PART NO. MODEL 1-4 5-9 10+ PART NO. MODEL 1-4 5-9 10+
T-222 Standard $115.00 $111.50 $108.00 T-222LR Standard $154.00 $149.50 $145.00
HT-291 High Temp $130.00 $126.25 $122.50 HT-291LR High Temp $169.00 $164.00 $159.00
SP222 Spring $6.75 ea. All Thinswitch models include: Allen wrench (for height adjustment),
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4 screws (#10-24 button head), 2 wire clamps & instructions.
PLASTIC PROCESS EQUIPMENT, INC. www.ppe.com
e-mail: sales@ppe.com
E 8303 CORPORATE PARK DRIVE W 6385 MONTESSOURI STREET
A MACEDONIA, OHIO 44056-2300 E LAS VEGAS, NEVADA 89113-1186 Toll Free: USA, Canada & Mexico
S 216-367-7000 • FAX: 216-367-7022 S 702-433-6385 • FAX: 702-433-6388 800-362-0706
T TOLL FREE: 800-321-0562 T TOLL FREE: 800-258-8877 Order Fax: 800-223-8305
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