JPH043009Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a fiber quantitative supply device that supplies a predetermined amount of cut fibers (chopped strands) such as glass fibers and carbon fibers cut into predetermined dimensions. .

[Prior Art] Conventionally, in the above-mentioned fiber quantitative supply device, a hopper that stores fibers that have been cut into predetermined dimensions in advance is provided at an upstream location of the fiber supply path, and a coil, screw, and vibrator that sends out the cut fibers in this hopper. etc., a mass detection means for detecting a change in the actual amount of cut fibers per unit time, and a detected mass signal of the mass detection means to determine whether the supply amount of cut fibers per unit time is equal to the set supply amount. A control means for controlling the driving speed of the feeder was provided so that the feeder could be driven at a speed as shown in FIG.

[The problem that the idea aims to solve]

In the case of this conventional fiber quantitative supply device, a predetermined amount of cut fibers that have been cut at another location and packed in bags or containers are transferred into the hopper, so that the cut fibers are transferred from the cut location to the hopper. The cut fibers tend to get entangled with each other during transportation and in the hopper, and as a result, the apparent specific gravity of the cut fibers fluctuates greatly and the cut fibers form small and large dumplings, so no matter how you drive and control the feeder,
There was a problem that caused large variations in the amount of cut fibers supplied per unit time.

The purpose of this invention is to provide a fiber quantitative feeding device that can suppress variations in the feeding amount caused by entanglement of cut fibers, and can feed the fibers in a stable manner with high precision even when feeding a small amount. It is in the point of providing.

[Means to solve the problem]

The fiber quantitative supply device according to the present invention is provided with a cutting device that cuts the raw material fiber into predetermined dimensions and a mass detection means that detects a change in mass per unit time of the raw material fiber or the cut fiber immediately after cutting, in the fiber supply path. In addition, a control means is provided for controlling the cutting device so that the amount of cut fiber delivered by the cutting device per unit time is constant based on the detected mass signal of the mass detecting device. It has the following characteristics and its effects and effects are as follows.

[Effect]

In other words, by disposing a cutting device directly on the fiber supply path and using this cutting device as a means for determining the amount of fiber delivered, the amount of cut fiber delivered per unit time is
Regardless of the mass change per unit time of the raw material fiber or the cut fiber immediately after cutting, by controlling it so that it remains constant, the cut fibers are much less likely to get entangled with each other as in the past, and the apparent specific gravity of the cut fiber is reduced. It is possible to make the fluctuations in the amount as small as possible, and also to suppress the formation of large and small dumplings.

[Effect of idea]

As a result, it is possible to finely adjust the amount of cut fibers fed per unit time by controlling the feed amount of the cutting device, and even when feeding a small amount, the cut fibers can be fed with high precision and stably. We were able to supply a fixed amount.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a fiber quantitative supply device, which consists of a base frame 1 provided on the upper side of a fiber supply path, a mounting table 2 for mounting and supporting raw material fiber A in the form of a roving, and A cutting device 4 that shreds the long fibers drawn out via the drawer guide 3 into predetermined dimensions, and a cut fiber a immediately after cutting.
A measuring device (an example of mass detection means) 5 for detecting a change in mass per unit time is provided.

A drive motor 6 is provided on the upper part of the measuring device 5, and the upper end of the drive shaft 6a of the drive motor 6 receives the cut fibers a sent from the cutting device 4 through the chute 7, and sends the cut fibers to the rotation path. A rotary table 10 is attached which drops and supplies fibers into the upper opening of the downstream supply tube 9 in cooperation with a scraper 8 provided at one location.

The cutting device 4 includes a cutting roller 4b equipped with cutting blades 4a at multiple locations on its circumferential surface, a first driven roller 4c made of rubber that is elastically pressed against the cutting roller 4b from the fiber supply path side, and , a second driven roller 4d that is in elastic pressure contact with the first driven roller 4c from the fiber supply path side slightly upstream of the cutting roller 4b, and a second driven roller 4d that is connected to the rotating shaft 4e of the cutting roller 4b. It consists of a drive motor (which is an example of an actuator) 4.
Then, when the cutting roller 4b is driven and rotated by the drive motor 4f, the first driven roller 4
c and the second driven roller 4d also rotate at the same circumferential speed, and long fibers are continuously pulled out from the raw material fiber A, and the long fibers are drawn out in a predetermined manner by the cooperation of the cutting blade 4a of the cutting roller 4b and the first driven roller 4c. Cut to size.

Further, based on the detected mass signal of the calculation sensor 5a of the measuring device 5, the cut fiber a is fed by the cutting device 4 per unit time so that the feed amount of the cut fiber a per unit time becomes the set feed amount. A control means B is provided for controlling the amount of feed.

As shown in FIG.
A setting signal is also output to the control section 13. This control section 13 compares and calculates the actual amount detected by the calculation sensor 5a and the target mass of the supply amount setting device 14, and when the actual amount decreases or increases than the target amount, D/A conversion is performed. Drive motor 4f via device 15
A control signal is output to the control circuit 16 of. The control circuit 16 increases or decreases the rotational speed of the drive motor 4f based on information fed back from the rotational speed sensor 17 of the drive motor 4f so as to reach the corrected rotational speed output from the control section 13. Through this control, the amount of cut fibers a delivered per unit time by the cutting device 4 is increased or decreased, and the amount of cut fibers a fed per unit time is maintained at the set supply amount.

The controller 13 also outputs information to a display circuit 18 to display the set supply amount, detected supply amount, total supply amount, remaining amount of raw material fiber A, and the like.

In addition, when the distance from the fiber receiving position to the fiber delivery position of the rotary table 10 is shortened, there is an advantage that variations in the density of cut fibers can be suppressed.

Next, another example will be described.

In the above-mentioned embodiment, the structure was configured to detect the mass change per unit time of the cut fiber A immediately after cutting, but as shown in FIG. It may be configured to detect the supply amount of cut fibers a per unit time from this decrease in raw material fibers A.

In the case of this embodiment, the increase or decrease in the supply amount of cut fibers a can be known from the decreasing state of raw material fiber A at an early stage, so the control delay is reduced, and the fixed amount of cut fibers a can be supplied with higher accuracy. There is an advantage that it can be done.

In addition, as shown in FIG. 4, a long raw material fiber A
The spindle 19a of the bobbin 19, on which the bobbin 19 is wound, is rotatably installed in a horizontal position on the brackets 20, 20 provided with the measuring device 5.
The cutting device 4 may be configured to supply long fibers that are unwound horizontally or substantially horizontally to the cutting device 4 via the guide rollers 21.

In the case of this embodiment, there is an advantage that measurement errors caused by tension fluctuations of the long fibers fed out from the bobbin 19 can be suppressed, and the cut fibers a can be supplied in a fixed quantity with higher precision.

Furthermore, the measuring device 5 may be attached to the chute 7.

In short, the measuring device 5 may be installed at any position as long as it is possible to detect a change in the amount of cut fiber a supplied per unit time.

Furthermore, in the above embodiment, the cutting device 4
In addition to the original cutting function, the function of drawing out long fibers from the raw material fiber A is provided, but the structure is not limited to this.
The cutting device 4 may be combined with a fiber quantitative supply device that supplies long fibers from the raw material fibers A.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the fiber quantitative supply device according to the present invention, with FIG. 1 being a schematic side view and FIG. 2 being a block diagram showing a control system. FIGS. 3 and 4 are schematic side views showing different embodiments. A... Raw material fiber, a... Cut fiber, B... Control means, 4... Cutting device, 4a... Cutting blade, 4b...
...cutting roller, 4c...driven roller, 4f...actuator.

Claims (1)

[Claims for Utility Model Registration] 1. A cutting device 4 that cuts the raw fiber A to a predetermined size, and a mass detection means that detects a change in mass per unit time of the raw fiber A or the cut fiber a immediately after cutting, in the fiber supply path. 5, and based on the detected mass signal of the mass detection means 5, the cutting device 4 is controlled so that the amount of cut fiber a delivered by the cutting device 4 per unit time is constant. A fiber quantitative supply device provided with a control means B. 2. The cutting device 4 includes a cutting roller 4b having a cutting blade 4a on its peripheral surface, and this cutting roller 4b.
A driven roller 4c is elastically pressed from the fiber supply path side, and an actuator 4f that drives and rotates the cutting roller 4b, and the control means B controls the driving rotation speed of the actuator 4f. The fiber quantitative supply device according to claim 1, which is a utility model.