JPH0240766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for forming a nonwoven fabric, which is used in the production of a nonwoven fabric to form raw fibers into a thin strip-like web and then fold this web to a desired thickness. Regarding machines.

BACKGROUND TECHNOLOGY A nonwoven fabric forming machine generally uses a cross conveyor device to drop a web onto a floor conveyor that moves in a substantially horizontal direction while reciprocating in the width direction of the floor conveyor, as shown in FIG. It is then folded in a zigzag pattern to form the desired thickness.

Problems to be Solved by the Invention In conventional nonwoven fabric forming machines, when the operation speed is increased, the outlet end of the cross conveyor device that drops the web generates turbulent air flow as it moves back and forth at high speed, causing the web on the floor conveyor to This causes the product to lift up and become misaligned, causing wrinkles on the product. For this reason, the operating speed is limited and high-speed operation is impossible.

In order to eliminate such inconveniences, the present invention has the following features:
The object of the present invention is to provide a nonwoven fabric molding machine that can operate at high speeds without causing turbulent airflow and causing wrinkles due to floating of the web.

Means for Solving the Problems The present invention provides a rectifying member that has a surface extending parallel to the surface of the folded web on the floor conveyor at the exit end of the cross conveyor device, and that moves parallel to the surface of the web. This non-woven fabric forming machine is characterized in that it is equipped with an outlet end to adjust the airflow caused by the movement of the outlet end and prevent the folded web from floating up.

Examples Examples illustrating the present invention will be specifically described below.

2 and 3 are front views of the nonwoven fabric forming machine 10,
A side view is shown respectively. In these figures, 1
Reference numeral 1 denotes a floor conveyor, which is made of a wooden lattice conveyor, and carries the folded web W and transports it in a substantially horizontal direction. 12 is a cross conveyor device;
The web W from the previous process is transferred to the first and second conveyors 1.
3, 14 and guide it upward to the third conveyor 15
and carry it to the upper center of the floor conveyor 11.
Further, the fourth conveyor 16 and the substantially U-shaped fifth conveyor 17 sandwich and transfer the material, and the rollers 19a and 19b located at the exit end 18 sandwich and transfer the material to the floor conveyor 11.
It is something that is dropped onto the top. Fourth and fifth conveyors 16, 17 and rollers 19a, 19 at the outlet end 18
b moves back and forth as shown in Figure 4 A, B, and C,
The falling position of the web W is reciprocated in the width direction of the floor conveyor 11. 20a and 20b are rectifying members, and rollers 1 at the exit end of the cross conveyor device 12
The rollers 9a and 19b are mounted close to both sides so as to reciprocate horizontally together with these rollers, and their lower surfaces are parallel to the surface of the folded web W on the floor conveyor 11. 21a,2
1b is an air suction port, which attracts the end of the web W on the floor conveyor 11 to the conveyor. 22
a, 22b are interval adjusting devices consisting of rollers that can be raised and lowered;
Adjust the spacing between 8 and 8. 23a and 23b are tension rollers equipped with weights.

Since this device 10 has the above configuration, the outlet end 18 of the cross conveyor device 12 moves back and forth,
It operates to fold the web W onto the floor conveyor 11 in a zigzag shape.

When this device 10 is operated at high speed, the outlet end 18 of the cross conveyor device moves at high speed, but because of the rectifying members 20a and 20b, the air below the outlet end 18 is not disturbed and the web on the floor conveyor 11 is moved. It only moves parallel to the W surface,
The folded web W does not float up, and therefore no displacement or wrinkles occur.

Since the flow regulating members 20a and 20b are used to regulate the airflow on their lower surfaces, the shape of the flow regulating members as a whole may be arbitrary as long as the lower surface has a surface parallel to the folded web. Also, the rectifying member is, of course,
It is necessary to move parallel to the web so as not to change the pressure on the bottom surface during movement, and if the exit end of the cross conveyor device moves horizontally as in the example above, it is sufficient to install it at the exit end. If the outlet end is arcuate and reciprocates, and is accompanied by tilting and vertical movement, a separate rail or the like must be provided to allow it to move horizontally.

Effects of the Invention As described above, since the nonwoven fabric forming machine of the present invention has a rectifying member at the outlet end of the cross conveyor device, even when operating at high speed, turbulent air flow is not generated due to movement of the outlet end. The folded web will not float up. Therefore, it is possible to speed up the operation and increase productivity without causing wrinkles in the product.

[Brief explanation of drawings]

Fig. 1 is an explanatory perspective view showing the folded state of a web in a nonwoven fabric forming machine, Fig. 2 is a front view showing an embodiment of the present invention, Fig. 3 is a side view of the same, and Fig. 4 is a cross conveyor device. It is a front view showing operation. DESCRIPTION OF SYMBOLS 10... Nonwoven fabric forming machine, 11... Floor conveyor, 12... Cross conveyor device, 18... Outlet end, 20a, 20b... Rectifying member, W... Web.

Claims (1)

[Scope of Claims] 1. The web has a floor conveyor that moves in a substantially horizontal direction and an exit end that moves back and forth in the width direction on the floor conveyor, and a thin strip-shaped web is dropped onto the floor conveyor and folded in a zigzag shape. In a nonwoven fabric forming machine, the cross conveyor device has a surface extending parallel to the surface of the folded web on the floor conveyor, and a rectifying member that moves parallel to the surface of the web at the exit end of the cross conveyor device. 1. A nonwoven fabric forming machine characterized in that the air flow generated by the movement of the outlet end is adjusted and the floating of the folded web is prevented.