SU835789A2 - Device for joining polymeric materials - Google Patents

Description

one

The invention relates to the field of joining polymeric materials, namely, devices for producing adhesive laminated structures, for example honeycomb panels.

A device for joining polymeric materials is known, comprising upper and lower plates, on the working surfaces of which electrical heating elements are fixed, made in the form of a package of electrically insulated closed spirals, shaped over the thickness of the package 1.

The disadvantage of the device is the local smith of the honeycomb filler due to the error in calculating the stiffness of the spirals, which leads to an increase in the number of non-glues, i.e., to a decrease in the quality of the joint.

In addition, when connecting the plates of various thicknesses, inn and materials, the calculation and production of electric spirals of different sizes are necessary.

The aim of the invention is to improve the quality of the connection and expand the technological capabilities of the device.

This goal is achieved by the fact that in the device for joining polymeric materials, the content of the upper and lower plates, on the working surfaces of which

electric heating elements, made in the form of a package of electrically insulated closed spirals, deformed in thickness of the package, are fixed; the electrically insulated spirals of the package are made with a diameter that increases uniformly with distance from the working surface of the package. Such an embodiment of electric heating elements with different stiffness of different layers of the package allows the device to be used for a wide range of materials to be joined and the strength characteristics of individual elements. it

will ensure uniform pressure on the surfaces to be glued over wider limits. The danger of the honeycomb honeycomb is eliminated by the choice of a larger diameter of the spirals so that

the corresponding layer itself chose the necessary deformations when the critical load was reached.

The drawing shows a schematic diagram of the device.

A device for joining polymeric materials contains the upper 1 and lower 2 plates, on the working surfaces of which elastic electric heating elements are fixed, made in the form of a package

electrically insulated closed spirals

3-5, deformed through the thickness of the package and arranged in layers, depending on the diameter. The diameter of the electrically insulated spirals increases uniformly with distance from the working surface of the package.

The device works as follows.

When plates 1 and 2 are closed, the electric heating elements come into contact with the glued parts 6. Depending on the elastic and geometrical characteristics of these parts, a layer with the corresponding rigidity begins to deform: 3, 4 or 5. When the load reaches the size of the honeycomb core the smallest rigidity (larger diameter) 4 or 5 selects the elastic deformation, leaving the load, obviously less than the critical one. Electric heating elements provide the required temperature for curing the adhesive joint.

The device according to the invention provides a quality compound for a wide range of materials.

Claims (1)

Invention Formula A device for connecting polymeric materials according to ed. St. No. 716844, characterized in that, in order to improve the quality of the connection and expand the technological capabilities of the device, the electrically insulated coils of the bag are made with a diameter that increases uniformly with distance from the working surface of the bag. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 716844, cl. In 29C 27/06, 1978 (prototype).