JPH07867B2 - Roller for impregnating binder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention substitutes for a reinforcing bar in order to strengthen the tensile strength of a structure by embedding it in a structural material having a low tensile strength, such as concrete or plastic. Or as a structural material used as a substitute for PC steel wire, more specifically, for example, as disclosed in JP-A-61-290150, the thin wires are knitted in a braided shape and the respective thin wires are bound to each other with a binder. The present invention relates to a roller for impregnating a binder, which is used for impregnating a fibrous body of a braid knitted in a braid shape with a binder for producing a structural material.

(Prior Art) Conventionally, in order to impregnate the above-mentioned braid fiber body with the binder, the braid fiber body c is continuously passed through the binder b accommodated in the impregnation tank a as shown in FIG. The braid fiber body c was impregnated with the binder b. In the figure, d indicates a guide roller of the braided fiber body c.

(Problems to be Solved by the Invention) However, in the case of the conventional binder impregnation method, there is a disadvantage that the binder does not sufficiently penetrate into the braid fiber body in which the fine wires are knitted in a braid form.

An object of the present invention is to provide a binder-impregnated roller that eliminates the above-mentioned inconvenience and allows the binder to sufficiently penetrate into the braid fiber body.

(Means for Solving the Problems) In the present invention, when impregnating a braid fiber body formed by knitting fine wires into a braid shape in a impregnation tank with a binder, the impregnation tank is provided to loosen the braid fiber body. The binder impregnating roller provided inside or in the vicinity thereof is composed of two or more sets of nip rollers spaced apart from each other that rotate while pressing the braid fiber body and move it in the conveying direction. In order to achieve the above object, the binder impregnating roller is configured such that the rotation speed of the nip roller on the upstream side in the conveying direction of the fibrous body is intermittently increased at a rotation speed higher than that of the nip roller on the downstream side in the conveying direction. did.

(Operation) A braided fiber body formed by knitting fine wires into a braided shape is, for example, pinched by two or more sets of nip rollers spaced apart from each other in a binder impregnation tank and conveyed by rotation of the nip rollers. The braided fiber body is moved in the direction, but while the rotation speed of the nip roller on the upstream side in the transport direction of the braided fiber body is higher than the rotation speed of the nip roller on the downstream side in the transport direction, the braided fiber body is The thin wires constituting the braided fiber body are loosened by being pressed from the nip roller side on the upstream side in the transport direction to the nip roller side on the downstream side in the transport direction.
The braided fiber body that is gradually loosened while being loosened between these nip rollers is gradually loosened by making the rotation speed of the nip roller on the downstream side in the transport direction higher than that of the nip roller on the upstream side in the transport direction. The length is shortened. When the slack length of the braided fiber body is shortened to a predetermined length in this manner, the rotation speed of the nip roller on the upstream side in the transport direction is again made higher than the rotation speed of the nip roller on the downstream side. By loosening each thin wire forming the fibrous body, the binder can be sufficiently permeated between the thin wires.

(Examples) Examples of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show a roller 1 for impregnating a binder according to the present invention.
An example is shown in which two rollers for impregnating the binder are used as one set, and
It is composed of a pair of nip rollers 1a, 1a, 1b, 1b, and these nip rollers are the same liquid binder 4 as in the conventional example of FIG.
In the impregnation tank 5 in which each of the sets is placed, a space is provided between each pair. The braided fibrous body 3 is formed by braiding the fine wires 2 of the chemical fiber such as aromatic polyamide fiber into a braided shape. The braided fibrous body 3 is impregnated with the binder 4 by passing through the impregnation tank 5, and then cured. And the thin wires are bound to each other and become a structural reinforcing material that replaces the reinforcing bars. The braided fiber body 3 is nipped by the rotating nip rollers 1a, 1a, 1b, 1b and conveyed in the conveying direction indicated by the arrow, and the nip roller 1 on the upstream side in the conveying direction.
Rotate the speed of a, 1a to the nip rollers 1b, 1
When the braided fiber body 3 is impregnated with the binder in the impregnation tank 5 by rotating the braided fiber body 3 intermittently at a higher rotation speed of 1.1 to 1.2 times, for example, the braided fiber body is sufficiently rotated. Looseness is provided to facilitate impregnation of the binder. The details are as shown in the second illustration, and the braid fiber body 3 is pressed by the nip rollers 1a, 1a on the upstream side in the transport direction to the nip rollers 1b, 1b side on the downstream side in the transport direction.
The distance between the thin wires 2 is loosened and the braided fiber body 3 itself between the nip rollers is gradually loosened. When the slack length of the braided fiber body 3 becomes a certain length or more, the rotation of the nip rollers 1a, 1a on the upstream side in the transport direction is stopped, or the rotation speed is lower than the rotation speed of the nip rollers 1b, 1b on the downstream side in the transport direction. By setting the speed, the slack of the braid fiber body 3 is shortened to a certain length as shown in FIG. After that, when the rotational speed of the upstream nip rollers 1a, 1a is made higher than the rotational speed of the downstream nip rollers 1b, 1b in the transport direction, the thin wire of the braided fiber body 3 relaxes, and the relaxation is repeated intermittently. As a result, the braided fiber body 3 can be sufficiently impregnated with the binder while being transported.

As shown in FIG. 4, three sets of nip rollers 1a, 1a, 1
b, 1b, 1c, 1c may be provided.In this case, the rotational speed of the nip rollers 1b, 1b on the upstream side is higher than that of the nip rollers 1c, 1c on the downstream side in the transport direction, and the nip roller 1a on the most upstream side, The rotation speed of 1a is made higher than the rotation speed of the nip rollers 1b, 1b.

Although the nip roller is provided in the impregnation tank in the above embodiments, it may be provided in the vicinity of the impregnation tank immediately before and after.

(Effect of the invention) As described above, according to the present invention, two sets of binder-impregnating rollers that impregnate a braid fiber body with a binder are rotated while the braid fiber body is pressed while being moved in the transport direction. Consists of the above nip rollers spaced apart from each other,
The braided fiber body is loosened with a very simple structure in which the rotational speed of the nip roller on the upstream side in the transport direction of the braided fiber body is intermittently increased at a rotational speed higher than the rotational speed of the nip roller on the downstream side in the transport direction. It is possible to obtain the effect that the binder can be sufficiently impregnated.

[Brief description of drawings]

1 to 3 are front views of an embodiment of a binder-impregnated roller of the present invention, FIG. 4 is a front view of another embodiment of the present invention, and FIG. 5 is a description of a conventional binder-impregnated state. It is a diagram. 1a, 1a, 1b, 1b, 1c, 1c ... Nip roller 2 ... Fine wire 3 ... Braid fiber body 4 ... Binder 5 ... Impregnation tank

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location D07B 5/00 B E04C 5/07 9130-2E

Claims (1)

[Claims] 1. A bond provided in or near the impregnation tank for loosening the braided fiber body when the braided fiber body formed by knitting fine wires in a braided shape is impregnated with a binder in the impregnation tank. The agent impregnating roller is composed of two or more sets of nip rollers arranged at intervals with respect to each other, which rotate while pressing the braided fiber body and move it in the transport direction. A binder impregnating roller that is rotated at a rotational speed intermittently higher than the rotational speed of the nip roller on the downstream side in the transport direction.