JP3416179B2 - Molding box for producing fiber moldings - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a cavity corresponding to the shape of a fiber molded product to be molded, and a large number of opened fibers are fed into the cavity and filled therein. The present invention relates to a molding box for producing a fibrous body used when performing a required process to form a fibrous body. [0002] As a conventional method for producing a fiber molded article,
For example, there is known a method in which raw cotton is spread, laid on a card, spun as a web, and formed into a fiber molded body of a web layer by forming the web into a certain thickness and shape. In addition, there has been proposed a method in which such a fiber molded body is formed by sequentially filling the inside of a futon, for example, by using an air flow. [0003] However, in the manufacturing method of forming a fiber molded body in a certain area by using such an air flow, it is difficult to form a high-density one, and high quality Was difficult to obtain. [0004] Therefore, the opener and the blower are separately provided,
A configuration has been proposed in which both units are communicated with a duct and an outlet is provided in a downstream region of the blower. By the way, in the case of such a configuration, a high-quality product can be manufactured only with a simple shape such as the side lining of a futon, but when forming various special shapes, ,
There is a possibility that an uneven portion or a missing portion may occur depending on the shape, which is a problem. [0005] In view of the above-mentioned drawbacks, the present invention provides a fiber molded body capable of producing a high-quality fiber without unevenness or lack of thickness in each part even when molding various shapes. It is an object of the present invention to provide a molded box for manufacturing. That is, the present invention relates to a method for manufacturing a fiber molded article having a cavity in the interior thereof that matches the shape of the fiber molded article to be formed, and having a fiber blowing port communicating with the cavity. A molding box for arranging a pin at an arbitrary position in the cavity, and removing the fiber molded body from the mold or, after blowing the fiber, compressing the upper and lower molds to a predetermined thickness as necessary. Means for retreating the pin from the cavity. According to the present invention, in a molding box having a cavity corresponding to the shape to be molded, in the area directly facing the fiber blowing port, the opened fiber to be fed is easily deposited and filled at a relatively high density. In consideration of this, plant multiple pins in the area directly facing the fiber blowing port,
When the upper and lower dies 100A and 100B are compressed while the shape to be formed has an angle close to vertical as shown in FIG. 7, the underfill 101A is formed in the fiber molded body 101 as shown in FIG. In consideration of the fact that it is easy to occur, one or more pins are planted in this part, the fiber is hooked on the pin, fixed once, and the opened fiber is filled so that the density distribution is uniform in the cavity, and the fiber Form a compact. Further, the formed fiber molded body is released from the cavity after the pin is withdrawn from the cavity by the withdrawal means. An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an apparatus for producing a fiber molded body to which a molding box according to the present invention is applied. As shown in FIG.
1 and a lower mold 12, a molded body 13 for accommodating them, and a pin 14 erected on the lower mold 12. In this embodiment, the pins 14 are provided in the molded body 13 shown in FIG. 3 in the width direction substantially orthogonal to the direction in which the opened fibers 2 blown from the fiber blowing ports 13B flow into the cavities C. I have. The pin 14 of this embodiment
Is for preventing underfill due to fiber slipping when the upper and lower dies 11 and 12 are rubbed, and has an outer diameter of 2 mm and a height of 20 mm. In this embodiment, the upper mold 11 and the lower mold 12 are used in order to form the cavity according to a desired shape. However, the present invention is not limited to this. For example, when a flat fiber molded body is formed, as shown in FIG. 5, only the box-shaped molded body 13 is used, and the upper mold and the lower mold do not have to be used. The pin 14 'at this time is provided with the retraction mechanism 3, and the base 14'A is formed to have a larger diameter than the other. The base end 14'A is engaged with the step of the wall surface 13A so as not to protrude into the cavity C. When the pin 14 'is to be implanted in the cavity C, the retraction mechanism 3 locks the claw 34 with a locking piece 13B provided on the wall surface 13A. Further, when the fiber molded body is released from the mold, the lock is released before the release, and the pin 14 'is released from the cavity C. Next, a molding box 1 (a modified example shown in FIG. 5) in which 11 pins 14 'having a height of 20 mm are planted in a cavity C (800 × 1600 × 50 (mm)), and the pins are planted. A comparative experiment was performed to form a flat fiber molded product using a molding box (comparative example) that was not set up, and the density distribution of the formed fiber molded product was examined. The data shown in the following table was obtained. . As shown in FIG. 6, 10 points a to j are set as sampling points in the molding boxes of the modified example and the comparative example.
A 100 (mm) sample was cut out and each density was measured, and the density distribution by blowing was measured. [Table 1] From Table 1, it can be seen that by erecting the pin 14 ', the fibers can be effectively prevented from concentrating at the central portion in the cavity C, and a fiber molded body having a high density uniformity can be obtained. As described above, according to the present invention, it is possible to prevent the spread fibers blown from the fiber blowing port from being deposited at a high density in the area directly facing the blowing port. Prevents the underfill due to the displacement of the blown open fibers due to the compression of the upper and lower molds by the pins planted in the cavity,
As a result, density unevenness is small and density uniformity is high,
In other words, a high quality fiber molded article can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram showing an apparatus for manufacturing a fiber molded body to which a molding box according to the present invention is applied. FIG. 2 is an exploded perspective view showing a molding box according to the present invention. FIG. 3 is a sectional view showing an arrangement of pins in the molding box. FIG. 4 is an essential part cross-sectional view showing a mounting state of a pin. FIG. 5 is a perspective view showing a modification of the molding box. FIG. 6 is an explanatory view showing a comparative experiment of the present invention. FIG. 7 is an explanatory diagram for explaining an operation. FIG. 8 is an explanatory diagram for explaining an operation. [Description of Signs] 1 Molding box 3 Exit mechanism 13 Molded body 13B Fiber blowing ports 14, 14 'Pin C Cavity

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B68G 7/06

Claims (1)

(57) [Claim 1] A molding box for producing a fibrous molded article having a cavity therein which conforms to the shape of the fibrous molded article to be formed and having a fiber blowing port communicating with the cavity. A molding for producing a fiber molded body, comprising: means for implanting a pin at an arbitrary position in the cavity, and withdrawing the pin from the cavity when the fiber molded body is released from the cavity. box.