Glossary: T

Take Up Unit

A tensioning mechanism that is used to remove the slack from a conveyor chain. There are both automatic and manual take up units. Automatic take up units include weight types, spring types and cylinder types.

Synonym: Tensioning Device

Teaching

An operation that causes a manipulator (robot) to memorize and learn the particular sequence of motions that are to be reproduced.

Thinning Viscosity

The viscosity of the paint, as adjusted to suit the particular coating conditions.

Thixotropic Nature

A physical characteristic in which a gel becomes a fluid simply by the action of stirring or shaking. If left to stand, the fluid will revert back to its original state as a gel.

Throwing Power

<When performing electrodeposition coating>

Once a paint film has been created on a portion of the coating object, further paint film precipitation is reduced due to the resistance of the existing build up of paint. Therefore, electricity tends to flow through to areas not yet covered with paint, where more paint film can then be deposited. The throwing power refers to this characteristic to form further coating deposits.

In real life, throwing power is measured as the length of the resulting coating when electrodeposition is used to coat a long, narrow iron plate having a width of 16 mm, which is located inside a pipe with an inside diameter of 17.5 mm.

In addition, this characteristic is referred to as "wrap around" in the field of electrostatic coating.

Total Heat Exchanger

A heat exchanger that can simultaneously recover both latent heat and sensible heat. Total heat exchangers are utilized for heat exchange (heat recovery) in coating booths, from both supply air and exhaust air.

Touch Up Ratio

When automatic coating is performed, the touch up ratio is a ratio of the size of the area requiring repair on the coated object, to the entire size of the area coated. The touch up ratio is occasionally expressed in units of time.

Transfer Efficiency

The percentage of paint that actually adheres to the object coated (test specimen), out of the total amount of paint sprayed to perform the coating operation. Transfer efficiency is measured in terms of a mass ratio of the paint's dried solids content. This measurement must be performed in accordance with the "Standard Measurement Method" stipulated by CEMA ("Comprehensive Reference Materials" on page 153).

Synonym: Adhesion Efficiency

Transfer Pressure

The pressure that is applied to paint when the paint is being supplied to the coating equipment.

The equipment used to feed paint under pressure to the coating equipment, includes pressure feed tanks, diaphragm pumps and plunger pumps.

Traverser

The equipment used to move a product in a horizontal or sideways direction.

Trolley Conveyor

A chain conveyor that transports loads within suspended trolleys that hang from rails installed in the ceiling. Types of trolley conveyors include rivetless units (I-beam rail) and unibelt conveyors (square pipes).

Synonyms: Overhead (Chain) Conveyor, Overhead Trolley Conveyor, Ceiling Conveyor

Tunnel Oven

A type of drying oven that is installed on a conveyor line. Tunnel ovens are used to bake coated objects and employ either IR radiation (infrared) radiated from both sides of the tunnel conveyor, or convective heat (hot air blasts).

Turn Over

The expected time required for the first solids content in electrodeposited paint to be replenished with newly supplied paint. Turn over can therefore be referred to as the "deterioration management period for electrodeposited paint".