JPS6135624Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a cement-based panel reinforced with glass fibers. The purpose is to propose a cement-based panel that has a higher reinforcing effect than glass fiber and is also more efficient to manufacture.

Conventional cement-based panels reinforced with glass fibers are made by mixing short glass fibers with cement mortar or concrete to form a premix and casting this into a formwork to form a panel, or by using glass fiber threads or fabrics. It is known that panels are formed by placing them in mortar or the like and using a hand lay-up method. The panel is easy to manufacture, but the fibers have no orientation, the fiber length is short, and the reinforcing effect is poor compared to the amount of fiber. The panel has high orientation and can have long fibers, so it has a high reinforcing effect, but it can also be expensive because the yarns are arranged vertically and horizontally, or because it uses expensive glass fiber fabric and requires a lot of manual labor. It was inevitable.

This idea was devised in view of the above circumstances. This will be explained below with reference to the embodiments shown in the drawings.

Figures 1, 2, and 3 show a cement-based panel according to this invention, in which a plurality of glass fiber threads 2 are formed in a waveform in a plane parallel to the panel surface on the surface layer of both the front and back sides. The yarns 2 are bent and arranged substantially parallel to each other for reinforcement, and the amplitude of the waveform of the yarns 2 is wider than the interval between the yarns 2, which are parallel to each other.

This panel has the above structure, and has particularly high bending strength in the direction in which the glass fiber threads are arranged in parallel, and since it is bent in a waveform in the direction perpendicular to this direction, the threads are oriented, so the bending strength in the perpendicular direction is also improved. do. Further, by bending the yarn 2 into a wave shape, it adheres well to the cement mortar or concrete, restricting it in a mesh shape and increasing the rigidity, so that the reinforcing effect can be further enhanced.

In this invention, the waveform amplitude of the glass fiber yarns does not necessarily have to be larger than the interval between the parallel yarns. However, if the amplitude is made larger than the interval, or if parallel threads overlap in the amplitude direction,
Since the glass fiber threads are continuously oriented also in the direction perpendicular to the laying, the bending strength in the perpendicular direction can be further improved.

In the above embodiment, the threads 2 are arranged in parallel only in one direction of the panel 1, but the threads 2 may be arranged in parallel in a direction perpendicular to this direction. Further, reinforcing reinforcing bars can be embedded in the panel to reinforce it together with the glass fiber threads in the surface layer. The glass fiber threads can be freely selected and embedded in the front and back surfaces of the panel, as well as in the center.

This panel is manufactured, for example, as follows: When a slurry such as cement-based mortar or concrete is poured into a formwork to manufacture the panel, a plurality of glass fiber threads are aligned and fed at predetermined intervals onto the surface of the poured slurry which has reached a predetermined thickness, and a feeder for the threads is made to travel in a predetermined direction, and at the same time, the feeder is made to reciprocate slightly in a direction perpendicular to the traveling direction to bend the threads in a wavy shape, so that the glass fiber threads are arranged in parallel to each other.

In addition to the above, to manufacture this panel,
For example, instead of moving the yarn delivery device, the formwork may be moved. Further, instead of reciprocating the sending device in small steps, the speed at which the yarn is sent out may be changed periodically. The yarn delivery device can be selected from well-known devices such as a type that blows out the yarn from a nozzle, and one that sends out the yarn through a pair of rolls.

This idea is as described above. This panel has high bending strength because the glass fiber threads are oriented in the thread parallel direction and the waveform amplitude direction, and the panel base material is bundled in a net shape. Compared to conventional premixed short glass fibers, the threads are longer and oriented in a plane parallel to the plane, so the reinforcing effect is significantly higher than the amount of glass fiber. In addition, the fiber cost is lower than that using glass fiber fabric, and the manufacturing efficiency is higher than when long glass fiber yarns are laid in two orthogonal directions using a hand lay-up method, and panel costs can be reduced.

[Brief explanation of the drawing]

The drawings show a panel according to an embodiment, and FIG. 1 is a partially cutaway plan view, FIG. 2 is a sectional view taken along line AA, and FIG. 3 is a sectional view taken along line BB. 1...Cement-based panel, 2...Glass long fiber yarn.

Claims (1)

[Scope of utility model registration request] A glass fiber-reinforced cement-based panel characterized in that a plurality of glass fiber threads are bent in a waveform in a plane parallel to the panel surface and arranged substantially parallel to each other within the cement-based panel.