JPH08229066A - Fiber stacking device - Google Patents

Abstract

PURPOSE: To make the main flow velocity from a fiber feed duct to a fiber stacking drum constant by forming the fiber feed duct into a header made narrower in width by stages in the rotating direction of the fiber stacking drum, and forming a scraping brush chamber in the same direction as the flow direction of the header. CONSTITUTION: A fiber stacking chamber 2 made narrower in passage area by stages in the peripheral direction of a fiber stacking drum 3 is provided. The length of the fiber stacking chamber 2 is determined by the exhaust pump pressure to be used and the pressure loss of the fiber stacking drum 3. The fibers stacked in excess are scraped by scraping brushes 4-1, 4-2 in a scraping brush chamber 12 and re-stacked in the scraping brush chamber 12. Part of the fibers is returned to a fiber feed duct 1 and again conveyed to the fiber stacking chamber 2. No retention area is generated in the fiber stacking chamber 2, fibers are not formed into blocks, and small-scale fibers are stacked. The fiber stack surface is not made the crater state when excess fiber stack sections are removed by the scraping brushes 4-1, 4-2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacking device in a diaper making machine.

[0002]

2. Description of the Related Art FIG. 2 is a side view showing the structure of a conventional fiber stacker. In FIG. 2, the fibers are pneumatically transported from the fiber supply duct 1 to the fiber stacking chamber 2 and sucked by the fiber stacking drum 3 which rotates while being discharged. The number of fibers accumulated on the stacking drum 3 is 2
After being adjusted to a predetermined thickness by the two scraping brushes 4-1 and 4-2, the direction is changed by the transfer roll 6,
It rides on the conveyance table 7 and advances to the next step. The surplus fibers removed by the scraping brushes 4-1 and 4-2 are returned to the fiber supply duct 1 again through the external reflux passage 5, or are back-flowed in the fiber stacking chamber 2 and sucked by the fiber stacking drum 3 again. It has a structure that can be attached.

Further, by adjusting the amount of air entering the fiber stacking chamber 2 from the secondary air inlet 8, the fiber stacking condition is controlled. In the figure, 9 is a stacking drum exhaust duct and 10
Indicates the inner wall of the fiber stack, and 11 indicates the retention area.

[0004]

In the conventional apparatus, the fibers that have flowed out from the fiber supply duct 1 are accumulated on the fiber stacking drum 3 until they are piled up, and the fibers are stacked in a large mass. Further, in the stacking chamber 2, the wake caused by the scraping roll 4-1 collides with the fiber flow, and the fibers are piled up as a large mass there. Therefore, when the excess fibers are removed by the scraping brush, the fibers are removed as a large lump, so that the fiber surface has a crater shape.

Further, the flow path of the fibers removed by the scraping brushes 4-1 and 4-2 has two systems, that is, the external reflux path 5 and the stacking chamber 2, and it is difficult to control the stacking state. there were.
The present invention was developed to address such problems, and an object thereof is to make the main flow velocity constant from the fiber supply duct to the fiber stack drum.

[0006]

In order to solve the above-mentioned problems, the structure of the fiber feeder according to the present invention is such that the shape of the fiber supply duct is a step narrow header with respect to the rotation direction of the fiber drum, and the header flow. A scraping brush chamber is formed in the same direction as the direction.

[0007]

According to the present invention, since the main flow velocity from the fiber supply duct to the fiber stack drum is constant by the above means, a retention area does not occur, the fibers cannot be solidified, and the wake from the scraping brush and the fibers Since the flow direction from the supply duct is the same direction, and the retention area does not occur, the fibers cannot be solidified. Further, since the return flow path is one system, it is easy to control the fiber stack by the secondary air inflow.

[0008]

1 is a block diagram of an embodiment of the present invention. In the figure, the same elements as in the related art are denoted by the same reference numerals as those in FIG. 2, and duplicate description will be omitted. In FIG. 1, 2 is a stacking drum 3
In the fiber stacking chamber, the flow passage area is gradually narrowed in the circumferential direction of, and the fiber is uniformly stacked on the fiber stacking drum 3. The stacking chamber length is determined by the exhaust pump pressure used and the pressure loss in the stacking drum. Reference numeral 12 denotes a scraping brush chamber, and the excess piled fibers are scraped by the scraping brushes 4-1 and 4-2 and re-laid in the scraping brush chamber 12. A part of the fiber is returned to the fiber supply duct 1 but has the same flow direction, so that the fiber flow is carried to the fiber stack chamber again without disturbing the fiber flow.

[0009]

As described above, according to the present invention, the shape of the fiber supply duct is a step narrow header with respect to the rotating direction of the stacking drum, and the scraping brush chamber is formed in the same direction as the flow direction of the header. Since it is a thing, since a retention area does not occur in the fiber stacking room, the fibers do not become flocs, and fibers of a small scale are fiber-loaded. Therefore, when removing the excess piled fiber portion with the scraping brush, the piled fiber surface does not become a crater shape.

Further, since the reflux path is one system and the control of the fiber stacker is facilitated, there is an effect that actual operating conditions such as the fiber stack amount of various pulps can be easily set.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a side view showing a conventional example.

[Explanation of symbols]

 1 Fiber Supply Duct 2 Stacking Room 3 Stacking Drum 4 Scraping Brush 12 Scraping Brush Room

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toshiaki Katsura, Toshiaki Katsura, 4-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Research Institute (72) Hideharu Doi 4-chome, Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture 6-22 No. 22 Hiroshima Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Yoshio Sugimoto 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries Hiroshima Works

Claims (1)

[Claims] 1. A fiber stacking device, wherein the shape of the fiber supply duct is a step width narrow header with respect to the rotation direction of the fiber stacking drum, and a scraping brush chamber is formed in the same direction as the flow direction of the header. .