SU835794A1 - Method of making load-bearing members glass-fibre plastics - Google Patents

Description

one

The invention relates to methods for producing laminated products and to be applied in building structures of laminated composite materials such as panels and shells.

There is a known method of making fiberglass power elements containing operations of laying out a package of reinforcing material and inserting rods-needles into a bag through a perforated tsulagu before curing, with the rods-needles made In a U-shaped bracket, in which the jumper is removed before the curing operation.

The disadvantages of this method are that the fixing of the needle rods in the material in the manufacture of power elements in this way is accomplished only by sticking the binder, which is not enough when such a structure operates under vibration conditions and leads to loss of the needle rods and partial loss of the carrier abilities 1.

There is also known a method of making power elements of glass-reinforced plastics, containing the operations of laying out a separating layer and a package impregnated with a binder, inserting the cores-needles into the bag over its entire thickness, crushing them and hardening the bag.

The operation of inserting the rod-needles into one part of the reinforcing material, followed by stacking after a series of intermediate operations of the rest of the bag, does not allow for the continuous process of making structures from laminated composite materials.

The package flipping operation limits its dimensions and does not allow for the production of a continuous process for the manufacture of structures from laminated composite materials.

The operation of removing the tillage and separating layer from the needle rods lengthens the process of manufacturing the strength member.

The operation of flattening the part of the protruding end of the needle rods adjacent to the package with the location of the flattened part of the DENTAL direction of the fibers directly on the product is difficult and time-consuming.

The operation of applying the second half of the bag to the flattened parts of the rod-needles ALONG the FIBER is laborious, time consuming and laborious.

The further application of a separating layer and collag lengthens the process of obtaining the POWER element 2.

The aim of the invention is to increase the strength of attachment of the rods-needles in the package and reduce the complexity of manufacturing power elements.

This goal is achieved by the fact that, in the method of making fiberglass plastic power elements, containing the steps for laying out a separating layer and a package impregnated with a binder, inserting rods-needles into the bag for its full thickness and curing the bag according to the invention carried out with alternation of flattened and non-flattened sections along the entire length of the rods-needles before inserting them into the packaged bag.

FIG. 1 shows the location in the material of the cores-needles, flattened in several places along their length and section AA; in fig. 2 - the location of the thinning of the flattened areas along the fibers (section B-B of Fig. 1).

A method of manufacturing glass fiber reinforced plastic power elements consists of laying pre-impregnated reinforcing material 3 on the laminate 1, covered with a soft separating layer 2, into which rods-needles 4, previously flattened in several places along the length, are inserted through a pulley 5 punched with thinning along the fibers. and cover with a pencil 6 to prevent the needles-needles from being pushed out, the flattened part 7 of the needles-needles being located along the direction of the fibers. The bag is then placed under a press to cure the product under pressure.

After pressing, the pills 6 and 5 are removed. In the resulting cured strength member, metal needles are molded and securely fastened throughout the entire thickness of the bag.

Introduction of pre-flattened

in several places along the length of single rods-needles for the entire thickness of the package leads to an increase in productivity in the manufacture of the power element due to

reducing the number of complex and time-consuming operations.

The proposed method allows a continuous process for the production of power elements due to the absence of

package reversal operations and subsequent laying of the rest of the package, increase the load-carrying capacity of the strength element by increasing the number of crushing along the entire length of the rod-needles with the aim of

eliminate their loss and more mechanical fastening in the package, put single rods-needles and vary the distances between them.

Claims (2)

Invention Formula A method of manufacturing glass fiber reinforced plastic power elements comprising the steps of laying out a separating layer and a package impregnated with a binder, inserting rods-needles into the bag over its entire thickness with flattening and curing the bag, characterized in that in order to increase the strength of fastening of the rods-needles in the package and reducing the labor intensity of manufacturing power elements, the core-needle needles are flattened with alternating flattened and non-flattened sections along the entire length of the needle-cores before insertion and I typed in the package. Sources of information taken into account in the examination. 1. USSR author's certificate No. 462726, cl. At 29D 9/00, .1973. 2. USSR author's certificate No. 545483, cl. In 29D 9/00, 1975 (prototype). Aa and W ///////// A . ig. Z