JPS61502391A - fiber supply device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] fiber supply device The present invention dissociates adhesive hard fiber bundles, particularly bundles of steel fibers, and A method for feeding fiber into a mixing device and a vibrating screen for carrying out the method. It is something that

By adding pre-cut steel fibers to the concrete mix the law of nature,! The method of adding a-fiber to the concrete mixture in a concrete mixer is already known. known to. However, such fibers collect during mixing and transportation. Concrete mixing tends to form clumps with aggregate and cement materials. It is not possible to make a substance contain only a few percent by volume.

A method of supplying fibers to dry cement and aggregates with an air stream has been proposed. . Although this method is a great improvement, steel and other metal fibers can be cut short. Only textiles are sold. These fibers gather together to form clumps or bundles, and this Fiber bundles are extremely tightly attached to each other, making it difficult to separate them into individual fibers. Ru.

In Swedish published patent application No. 7508720-5, fiber bundles are A method of disassociating the vibration alignment by rolling it using a lean or rolling machine. Also disclosed is an apparatus. The fiber feed rate is determined by the screen or tumble mill. It is varied by increasing or decreasing the operating speed or the discharge opening of the mill. The fiber is They are arranged on one plane by being dropped by gravity onto a vibrating table. Aligned by airflow within the feed pipe.

The present invention enables bundles of objects to be bundled without aligning them after arranging them on a single plane intermediately on a vibrating table. Dissociate the A fibers obtained as The purpose is to provide a simple method of supplying. The present invention also implements the above method. It also includes a screen.

The object of the present invention is to vibrate adhesive fiber bundles on a vibrating screen to separate them into individual a. The above-described Before passing through the aperture, the TA fibers are moved parallel to the screen by the vibrating motion of the screen. Aligned on a plane, the above apertures primarily allow only one fiber to pass through the same aperture at a time. It has a shape that allows the above solution g! The fibers are spread over a large area by gravity and vibration forces. is supplied to the mixing device over the area, and the area is larger than the area of the screen. This is achieved by the method according to claim 1, characterized in that:

The screen for carrying out this method has elongated openings, and the length of the openings is mainly for the above-mentioned fibers. The portion of the sieve that is equal to the length of the fibers and whose width is substantially smaller than the length of the fibers is hand-sealed. The present invention will be explained from stage to stage based on the drawings.

Figure 1 is a cross-sectional view of a concrete mixer device comprising the screen of the present invention. 2 is a top view of the concrete mixer device.

The concrete mixer device shown in Figure 1 has a mixing mechanism not shown. A mixing means 1 is provided, and the mixing mechanism is driven by a motor 2. Mixing means 1 A screen 3 is arranged above, and the screen 3 is equipped with means 4 for sieving. . The means for the above-mentioned sieve is to apply vibrational motion via an eccentric member 6 by a motor 5. It will be done. The means 4 for the above-mentioned sieve is a long one with a diamond-shaped opening as shown in FIG. 2, for example. It has an opening 8.

The screen 3 is such that the sieve portion is supplied to the screen when the means moves back and forth. It has a side wall 7 for holding fibers to be collected. The sieve portion is the size of the mixing means 1. It covers a large area. It is desirable that this covered area be as large as possible. No. In Figure 2, the width of the five-point means is approximately half the radius of the circular mixing tank 1. sieve The length of the means is such that all the fibers fall into the mixing tank 1.

Naturally, the closer this screen is to the center of the mixing tank, the longer it will be. The width can be increased.

By changing the rotational speed of the motor 5, the above sieve can be adjusted at the speed of the means. The amount of fiber supplied can be increased or decreased at any time.

The opening of the sieve means is elongated, preferably oblong, i.e. rectangular and It is desirable to include both rhombuses. The shape of the aperture is primarily for one a-fiber at a time. It is necessary that all the components can pass through the same opening.

The maximum dimension of the opening is about the same as the length of 1A, and the dimension perpendicular to the longest dimension is two or more. It must not allow the fibers attached to the top to pass through. Practical minimum long rhombus opening The dimensions are such that the sum of the lengths of two adjacent sides is slightly larger than the length of the fiber. child In the case of , only fibers whose long axes have a certain angle to the plane of the sieve can pass through. It is. The preferred practical maximum dimension of an oblong rhombus opening is that the sum of the lengths of two adjacent sides is the length of the fiber. It is twice the length of . Naturally, the opening width is usually two. It must be impossible for a bundle of fibers to pass through. The sieve is the means Rather than being flat, it has protrusions and corresponding recesses (negative protrusions), and the height of the top surface is regular. Alternatively, it is desirable to have irregular changes.

An example of a preferred sieve means is a sieve with diamond-shaped openings made of expanded metal. It is something that This expanded metal aperture has a sieve portion relative to the surface of the means. It forms an acute angle. - As an example, for a fiber of length 18, the maximum number of openings An expand deck with a diamond-shaped opening of 25 m + a square wire and 12 m + m short diagonal cotton. A metal screen is extremely suitable. Opening dimensions vary depending on fiber length .

When using the method of the present invention, wA fibers are supplied in the form of fiber bundles, not only single fibers but also single fibers. Available for use. Scrub this fiber bundle using a chainless chainer and a lever 911. The screen 3 is placed directly above the mixing tank 1. Mixed At the same time or preferably in advance, wet sand is added to the mixing means]. This sand It should not be dry. The above-mentioned sieve amount is mainly processed once through the means. Since only one TA fiber passes through the same aperture in a given time, many fibers can be spread out per unit time. It can be supplied over a large area. Therefore, there will be no clogging in the mixing tank. A large amount of fiber can be supplied. As the screen vibrates, the fibers are sieved. minute is given a motion component parallel to the plane of the means. Therefore, for W4 fibers, the sieve is handled by hand. It spreads like a trap over an area larger than the area of the step. The mixing device 1 mixes Disperse the fibers before they stick together. Continue, preferably at the same time, along with other Aggregates such as ipisilicon diacid are added. Add aggregate followed by cement and then water to produce mixed concrete. This concrete cannot be applied by spraying. can. This spraying aligns the fibers in one direction in the concrete. .

The present invention (not limited to the production of reinforced concrete, but also other substrates containing fibers, etc.) For example, it can be used to make asphalt and pichumeno.

Procedural amendment August 19, 1986

Claims (8)

[Claims] 1. By vibrating the adherent fiber bundle on a vibrating screen, it becomes dissociated fibers, The dissociated fibers are passed through the elongated openings of the screen in a plane parallel to the plane of the screen. In the arranging means, primarily only one fiber at a time passes through said aperture. It is possible to pass through one opening, and the dissociated fibers are mixed by gravity and vibration force. supply over a wide area of the installation, and the above area is larger than the area of the screen. Dissociate adhesive hard fiber bundles, especially steel fiber bundles, characterized by A method of feeding a mixture into a mixing device. 2. The sieving means of the vibrating screen has an elongated opening, and the said opening is mainly and a length corresponding to the length of said fibers as well as substantially less than the length of said fibers. A vibrating screen implementing the method according to claim 1, characterized in that it has a width. hmm. 3. characterized in that the sieving means has a protrusion and a recess relative to its surface; The screen according to claim 2. 4. characterized in that the plane of each opening forms an acute angle to the plane of the sieving means. The screen according to claim 2 or 3. 5. Claims 2 to 4 characterized in that the opening of the sieving means is diamond-shaped. Method described. 6. A special feature characterized in that the sieving means is made of expanded metal. The method according to claims 2 to 5. 7. Claims 2 to 3 are characterized in that the opening of the sieving means has an elongated rhombic shape. The method described in 4. 8. Claim 7, characterized in that the opening of the sieving means is rectangular. the method of.