JPS5855105B2 - Manufacturing method for reinforcing baskets using long glass fibers - Google Patents

Description

[Detailed Description of the Invention] Traditionally, iron wire has been used to reinforce concrete pipes, but recently, attention has been focused on the strong tensile strength of glass fibers, and this has been used for reinforcement, which is superior to conventional steel reinforcement. Attempts began to be made to manufacture thin-walled, high-strength products that had not been possible before.

In addition to cement products, we can also impregnate glass fiber with a suitable synthetic resin, or mix it with suitable aggregate.
There is also a synthetic resin mortar tube reinforced with glass fiber.

In these cases, the glass fibers are usually cut into short fibers of about 15 to 50 mm, and these are added to cement mortar or resin liquid and mixed, or the long glass fibers are buried in the wall of the product using extremely complicated mechanical equipment. was the usual law.

The present invention manufactures a reinforcing basket made of long glass fibers (roving) with the required shape and fiber content, so that it can be used like a reinforcing cage in concrete products.
By using this reinforcing cage made of long glass fibers, the long glass fibers can be embedded very easily and effectively within the wall thickness of the product, unlike conventional cages, to produce thin-walled, high-strength products. .

The present invention will be explained in detail below.

As shown in FIGS. 1 and 2, axial striations 12 made of long glass fibers (r: J-ping) whose entire fibers are sufficiently impregnated with thermosetting resin are placed on the outer periphery of a cylindrical formwork 11. Next, long glass fibers (rovings) whose entire fibers are sufficiently impregnated with a thermosetting resin are wound spirally around the outer periphery of the axial striations 12 at an appropriate pitch. A spiral muscle 13 is formed.

Then, the axial muscle 12 and the spiral muscle 1 are heated by appropriate heating means.
3, the thermosetting resin impregnated in the axial striations 12 and the spiral striations 13 hardens, imparting elasticity, and their intersections are automatically bonded.

Thereafter, by removing this from the formwork 11, a cylindrical reinforcing cage made of long glass fibers is obtained.

This cylindrical reinforcing cage can be used for reinforcing cages such as centrifugal concrete pipes, and can also be used for reinforcing concrete pipes reinforced with glass long fibers using existing equipment without the need for special long fiber processing equipment. This allows for easy centrifugal molding.

Furthermore, by attaching highly rigid thin steel wires to long glass fibers or by gently twisting them together, the long glass fibers are supported by the elasticity of the thin steel wires, making it possible to form fairly large reinforced cages. can.

Next, when we compare the present invention with glass fiber woven fabrics, we find that the fiber content, pitch, etc. vary greatly depending on the diameter and strength of the tube, so woven fabrics cannot adequately respond to these changes, and the shape and dimensions of the woven baskets. Woven fabrics are far behind the present invention in terms of retaining the same.

In contrast, with the present invention, even if the shape is complex, it is possible to freely manufacture products with simple and accurate dimensions and shapes as long as a mold is available.

Furthermore, since thermosetting resins harden in a short time when heated, mass production of reinforced cages is also possible.

As described above, in the present invention, a large number of axial striations made of long glass fibers impregnated with a thermosetting resin are arranged at predetermined intervals on the outer periphery of a cylindrical form, and on the outer periphery of the axial striations, A large number of threads made of long glass fibers and reticulated wires impregnated with a thermosetting resin are spirally wound at an appropriate pitch, and after the thermosetting resin is cured, it is removed from the mold. Therefore, a cylindrical cage of a desired size made of long glass fibers having a strong tensile strength can be easily formed and used for reinforcing concrete pipes.

Moreover, since the reinforcing cage is mostly made of long glass fibers, it is lightweight, making it easy to transport and place in the formwork when manufacturing concrete pipes. Because it is impregnated with fiber, it not only imparts elasticity to the entire fiber upon curing, but also significantly increases its shape retention, and even if the diameter of the basket is increased to a certain extent, it does not deform or bend. Intersection points can also be glued automatically.

Furthermore, since curing can be completed in a short time by heating, mass production of baskets becomes possible.

Moreover, since the spiral reinforcement is made up of long glass fibers and reticular wires, and the long glass fibers are supported by the elasticity of the reticular wires, it is possible to form quite large reinforced cages. have an effect.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of the main part showing an embodiment of the present invention, and FIG.
The figure is a longitudinal side view of the same as above. 11... Formwork, 12... Axial reinforcement, 1
3...Spiral muscle.

Claims (1)

[Claims] 1 A large number of axial lines made of long glass fibers impregnated with a thermosetting resin are arranged at predetermined intervals around the outer periphery of a cylindrical form, and the outer periphery of the axial lines is impregnated with a thermosetting resin. Reinforcement using long glass fibers, characterized in that a large number of threads made of long glass fibers and reticular wires are spirally wound at an appropriate pitch, and after the thermosetting resin is cured, the resin is taken out of the mold. How to make baskets.