Vante 3120, Инструкция по эксплуатации, Страница: 9 / 20

Vante
™
Model 3120
1
1. Description
1.1 The RF Forming/Welding System
1.1.1 The Model 3120 RF Generator is the foundation of a system used to
perform sealing, forming and/or welding operations of RF reactive thermoplastic
materials. It must be interfaced to various other components in order to create a
system that performs the required operation. Paragraphs 1.1.2 through 1.1.5
describe, to a great extent, the possible ways in which a system is designed and
assembled.
1.1.2 The unit may, or may not, be controlled by an external programmable logic
controller which can be provided by Vante™, or the customer may provide his
own control. An interface cable may be required, with the generator end being a
15 pin male D sub-miniature connector. A control board may be utilized within
the sealing/forming/welding head in some applications, in which case an interface
cable may not be required. The controller is activated either manually by a foot
switch, which Vante™ can provide, or by other means.
1.1.3 A matching network, provided by Vante™, is required and may be
integrated into the forming or welding head.
1.1.4 The head itself may be designed and manufactured by Vante™, or the
customer may design and manufacture his own in close association with Vante™
's engineering department so that it interfaces properly, both mechanically and
electrically, with the matching network.
1.1.5 All necessary components (controller, coaxial cable, interface cable, foot
switch, matching network, forming/welding head, control board, etc.), when
supplied by Vante™, are provided at additional cost.
1.2 Theory of Operation
1.2.1 The physical properties of RF-reactive thermoplastic materials cause them
to dielectrically heat at a molecular level in the presence of RF energy. This
energy causes the plastic to soften due to the friction of the vibrating molecules.
In this softened condition, the plastic becomes weldable because the molecules
are free to intermingle under the application of external forces, such as
compression. If allowed to cool while the forces are applied, the weld will be
permanent.
1.2.2 The RF Generator is the instrument that produces, when actuated, a
controlled amount of RF energy. The Sealer mechanically compresses the tubing
across its diameter during the sealing and forming process. When the energy is