JP3022556B1 - Pretreatment equipment for inorganic short fiber nonwoven fabric manufacturing process - Google Patents

Abstract

A pretreatment device for an inorganic short-fiber nonwoven fabric manufacturing process that opens a fiber without breaking it, imparts a fluffy state, and can be easily spread into a fleece shape having a uniform layer thickness in a carding process. To provide. SOLUTION: A carry-in conveyor 1 for carrying inorganic short fibers 9a into a pre-processing chamber 4 by a fixed amount, a feeding roller 2 and a pre-spreading cylinder 3 installed at an entrance side of the pre-processing chamber 4.
Aging treatment is performed on the plurality of main opening cylinders 5 installed in the pre-processing chamber 4, the pre-processing agent spray nozzle 6 installed on the upper part of the pre-processing chamber 4, and the pre-processed inorganic short fibers 9b. And an unloading conveyor 8 for unloading.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pretreatment apparatus for a process for producing nonwoven fabric of inorganic short fibers such as glass fiber and carbon fiber.

[0002]

2. Description of the Related Art Recently, it is urgently required to take measures to purify exhaust gas (black smoke and the like) from diesel engine vehicles. As a filter material used in the purifier, carbon fiber, glass fiber, etc. having excellent heat resistance are used. Felt made of inorganic short fibers has attracted attention.

[0003] The felt is manufactured by feeding the raw fibers to a cage cylinder while spreading the raw fibers using a roller card machine, spreading the fleece into a uniform layer thickness fleece, and interlacing the fibers with each other using a needle punching machine. ing.

[0004]

However, unlike the natural fibers and the like, the inorganic short fibers have no crimps in the fibers themselves and are in a straight hair state, so that the fibers are not entangled with each other and form a bundle-like nodule. In the carding process, it was difficult to spread a fleece having a uniform layer thickness, and a high-quality felt could not be obtained. Further, there is a problem that if the fiber is forcibly opened, the fiber is frequently broken.

The present invention has been developed to solve the above-mentioned problems, and an object of the present invention is to open a fiber without breaking the fiber and impart a fluffy state in a card process. An object of the present invention is to provide a pretreatment device for an inorganic short-fiber nonwoven fabric manufacturing process that can be easily spread into a fleece shape having a uniform layer thickness.

[0006]

In order to achieve the above object, a pretreatment apparatus of the present invention for producing an inorganic short-fiber nonwoven fabric comprises:
A carry-in conveyor for carrying a certain amount of inorganic short fibers into the pre-processing chamber, a feed roller and a pre-opening cylinder installed on the entrance side of the pre-processing chamber, and a plurality of main opening cylinders installed in the pre-processing chamber. A pretreatment agent spray nozzle installed in the upper part of the pretreatment chamber, and a carry-out conveyor for carrying out the aging treatment of the pretreated inorganic short fibers and carrying them out. With this configuration, the inorganic short fibers are carried into the pre-processing chamber by a constant amount by a carry-in conveyor, and are continuously supplied by a feed roller to the preliminary opening cylinder by a fixed amount, and then pre-opening is performed. During this main spreading, the preprocessing agent is sprayed from the preprocessing agent spray nozzle installed at the upper part of the preprocessing chamber to make the inorganic short fibers easy to slip, and a fluffy good open state And the aging process can be carried out while carrying out by the carry-out conveyor.

In the preliminary opening cylinder, coarse sawtooth-shaped opening blade members are arranged at a coarse pitch in the axial direction at coarse intervals in the circumferential direction, and the rotation direction is scooped with respect to the fiber supply direction. It is characterized by being driven to rotate at a low speed in the raising direction. With this configuration, the preliminary opening of the inorganic short fibers can be performed by a soft touch with a coarse sawtooth-shaped opening blade member at a coarse pitch in the axial direction, and a decrease in yield due to breakage can be prevented.

[0008] In addition, the above-mentioned fiber-spreading cylinder comprises coarse sawtooth-shaped fiber-spreading blade members arranged at a coarse pitch in a circumferential direction at a coarse pitch in an axial direction, and a rotation direction is relative to a fiber supply direction. It is characterized by being driven to rotate at a low speed in the direction of scooping. With this configuration, the main opening of the inorganic short fiber can be performed by a soft touch with a coarse sawtooth-shaped opening blade member at a coarse pitch in the axial direction, and a decrease in yield due to breakage can be prevented.

Further, the present invention is characterized in that an openable / closable damper is provided on the outlet side of the pretreatment chamber, and the opening and closing of the damper makes it possible to adjust the pretreatment time of the inorganic short fiber in the pretreatment chamber. And With this configuration,
In the pre-processing chamber, the inorganic short fibers are main-spread by a plurality of main-spreading cylinders, and are pre-processed in a fluffy state by a pre-processing agent sprayed from a pre-processing agent spray nozzle.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall schematic side view showing an embodiment of the apparatus of the present invention, FIG. 2 is an enlarged side view of a feed roller and a preliminary opening cylinder portion, and FIG. 4 (A), 4 (B), and 4 (C) show an enlarged plan view, an enlarged front view, and an enlarged side view of the opening blade member of the preliminary opening cylinder.

In FIG. 1, 1 is a carry-in conveyor, 2 is a feed roller, 3 is a pre-opening cylinder, 4 is a pre-processing chamber, 5 is a main opening cylinder, 6 is a pre-processing agent spray nozzle,
Reference numeral 7 denotes a damper, 8 denotes a carry-out conveyor, 9a denotes inorganic short fibers before processing, 9b denotes pre-processed inorganic short fibers, 10 denotes a carriage, and 11 denotes a casing.

The carry-in conveyor 1 contains inorganic short fibers 9 before treatment.
A small amount of “a” is carried into the pre-processing chamber 4 by small amounts and is driven intermittently or continuously at an appropriate speed according to the pre-processing state in the pre-processing chamber 4. The feed roller 2 and the preliminary opening cylinder 3 are installed on the entrance side of the preliminary processing chamber 4. As shown in FIG. 2, the feed roller 2 has an auxiliary feed roller 2a provided on the feed end of the carry-in conveyor 1, and a pair of upper and lower feed rollers 2b, 2c installed in front of the auxiliary feed roller 2a.

As shown in FIGS. 2 and 4, (A), (B) and (C), the preliminary opening cylinder 3 is provided with a coarse sawtooth opening fiber member 3a having a coarse pitch in the axial direction. Are arranged at coarse intervals (for example, at an interval of 120 degrees), and are rotationally driven at a low speed in a direction in which the fibers are scooped up with respect to the fiber supply direction. The fiber opening blade member 3a is shown in FIG.
As shown in (B) and (C), those having a U-shaped cross section are used, and have a shape suitable for preliminary opening without breaking the inorganic short fibers 9a before treatment.

As shown in FIG. 1, the pre-processing chamber 4 is provided with a plurality (two or more in the illustrated example, but two or more) of the main opening cylinders 5 are installed and Is provided with a pretreatment agent spray nozzle 6. The main fiber opening cylinder 5
As shown in FIG. 3, the spreader blade members 5 a formed in an L-shaped cross section are arranged at coarse intervals (for example, 90 ° intervals) in the circumferential direction, and the rotation direction is relative to the fiber supply direction. It is driven to rotate at a low speed in the direction of scooping up. Each of the plurality of main opening cylinders 5 is driven to rotate in the same direction at the same peripheral speed. The opening blade member 5a has a coarse sawtooth shape at a coarse pitch in the axial direction as shown in FIG. 4B, and is suitable for main opening without breaking the pre-opened inorganic short fibers. It is shaped.

The pretreatment agent spray nozzle 6 sprays a pretreatment agent (for example, silicone oil or the like) on the surface of the inorganic short fibers during the main opening by the main opening cylinder 5 to facilitate slipping.
In addition, a fluffy and good open state can be provided. The pretreatment agent spray nozzle 6 is disposed above the plurality of main opening cylinders 5 so that the pretreatment agent can be sprayed uniformly over the entire length in the axial direction. Is supplied to a plurality of header pipes via a pipe by a pump through a pipe, and is sprayed from a plurality of nozzles formed in each header pipe. The surplus pretreatment agent staying at the bottom of the pretreatment chamber 4 is recovered and used.

The damper 7 is installed at the outlet side of the pretreatment chamber 4 so as to be openable and closable. By opening and closing the damper 7, the pretreatment time of the inorganic short fibers in the pretreatment chamber 4 can be adjusted. Specifically, by closing the damper 7, the main opening operation by the main opening cylinder 5 and the spraying operation of the pretreatment agent from the pretreatment agent spray nozzle 6 can be repeatedly applied to the inorganic short fibers. When the damper 7 is opened, the pre-processed inorganic short fibers 9b sprayed with the main fiber and the pre-processing agent are sent to the carry-out conveyor 8.

The carry-out conveyor 8 carries out the aging process while carrying out the pre-processed inorganic short fibers 9b. This aging process is for drying the pre-treatment agent sprayed on the inorganic short fibers 9b. And either natural drying or forced drying. The transport cart 10 is provided at the end of the unloading conveyor 8, receives the aged inorganic short fibers 9b, and transports the inorganic short fibers 9b to a fleece machine in the next step.

[0018]

According to the present invention, inorganic short fibers are carried in a predetermined amount by a carry-in conveyor into a pre-processing chamber, and are continuously supplied by a feed roller to a pre-opening cylinder in a fixed amount to perform pre-opening. During the main opening, the preprocessing agent is sprayed from a preprocessing agent spray nozzle installed at the upper part of the preprocessing chamber during the main opening to make the inorganic short fibers easy to slip, and An aging process can be performed while giving a fluffy and good open state and carrying out the product on a carry-out conveyor.

Further, the preliminary opening of the inorganic short fibers can be performed by a soft touch with a coarse sawtooth-shaped opening blade member at a coarse pitch in the axial direction, thereby preventing a decrease in yield due to breakage. Further, the main opening of the inorganic short fibers can be performed by a soft touch with a coarse sawtooth-shaped opening blade member at a coarse pitch in the axial direction, and a decrease in yield due to breakage can be prevented. Further, the inorganic short fibers are main-spread in a pre-processing chamber by a plurality of main-spreading cylinders, and are pre-processed in a fluffy state by a pre-processing agent sprayed from a pre-processing agent spray nozzle.

Therefore, according to the present invention, the inorganic short fibers can be opened without breaking, and a fluffy state can be imparted to easily spread in a fleece machine into a fleece shape having a uniform layer thickness. High quality inorganic short fiber nonwoven fabric can be manufactured with good yield.

[Brief description of the drawings]

FIG. 1 is an overall schematic side view showing an embodiment of the apparatus of the present invention.

FIG. 2 is an enlarged side view of a feeding roller and a preliminary opening cylinder portion.

FIG. 3 is an enlarged side view of the main fiber opening cylinder.

FIGS. 4A, 4B, and 4C are an enlarged plan view, an enlarged front view, and an enlarged side view of an opening blade member of a preliminary opening cylinder.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 carry-in conveyor 2 feed roller 3 pre-spreading cylinder 3a opening fiber blade member 4 preprocessing chamber 5 main opening cylinder 5a opening fiber blade member 6 pretreatment agent spray nozzle 7 damper 8 unloading conveyor 9a inorganic short fiber before processing 9b processing Inorganic short fiber 10 Carrying trolley 11 Casing

Claims (4)

(57) [Claims] 1. A carry-in conveyor for carrying a predetermined amount of inorganic short fibers into a pre-processing chamber, a feed roller and a pre-spreading cylinder installed at the entrance side of the pre-processing chamber, and a plurality of cylinders installed in the pre-processing chamber. Inorganic short-fiber nonwoven fabric comprising a main-spreading cylinder, a pretreatment agent spray nozzle installed in the upper part of the pretreatment chamber, and a carry-out conveyor for aging and carrying out the pretreated inorganic short fibers. Pretreatment equipment for the manufacturing process. 2. The pre-spreading cylinder comprises coarse sawtooth-shaped spreader blade members arranged at a coarse pitch in a circumferential direction at a coarse pitch in an axial direction, and a rotation direction with respect to a fiber supply direction. 2. The pretreatment apparatus according to claim 1, wherein the apparatus is driven to rotate at a low speed in a direction of scooping. 3. The fiber-spreading cylinder has coarse sawtooth-shaped fiber-spreading blade members arranged at a coarse pitch in a circumferential direction at a coarse pitch in an axial direction, and a rotation direction is relative to a fiber supply direction. 3. The pretreatment device for the inorganic short fiber nonwoven fabric manufacturing process according to claim 1, wherein the device is driven to rotate at a low speed in a direction of scooping. 4. An opening and closing damper is provided at an outlet side of the pretreatment chamber, and the opening and closing of the damper makes it possible to adjust the pretreatment time of the inorganic short fibers in the pretreatment chamber. Preliminary treatment device for the inorganic short fiber nonwoven fabric manufacturing process according to any one of 1 to 3.