JPS63126982A - Production of fiber molded article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a fiber molded article in which a fiber aggregate made by mixing a thermofusible resin and fibers is formed and solidified using a mold hot press.

Conventional methods for manufacturing tangible molded products of fibers involve cutting fiber mats such as felt, which is made by mixing fibers and resin into heat-fusion molding, or heat-insulating material, which is made by fusion-molding nonwoven fabric, into the desired shape. These are fibrous felt or mat molded products obtained by heat-fusion molding process of fibers with resin, and are further divided into If a fibrous mat is formed into a solid form in the processing process, there will be a waste of double manufacturing processes, and if a fibrous mat is formed into a solid form, there will be loss of edges due to the non-formal form.

The present invention solves the above-mentioned drawbacks and provides a new manufacturing method in which fiber fusion, hardening, entangling and form forming are performed in a series of steps.

That is, the present invention uses a device that is equipped with a hot blast furnace equipped with a hot blast generator and a mold heat press mechanism, in which a heat-fusible resin is uniformly mixed with fibers, and a fiber aggregate of a required thickness is transferred into the hot blast stove using a weighing conveyor. Then, heated air is passed through the fiber assembly in a hot air oven, and the resin is lightly fused and hardened to the fibers to form a felt with intricate fiber channels.Furthermore, this felt is transferred and inserted into a mold heat press. In the meantime, the fiber aggregate is transported and inserted into the hot air oven as described above, and mold No.
3 In the heat press, the felt of the fiber channel is carried and inserted between the heat presses fitted with upper and lower molds having arbitrary shapes and patterns, and the felt is high-pressure heat-pressed to completely heat-fuse the fibers and resin. This method is characterized in that the steps of solidifying, solidifying, forming and then deriving are repeated intermittently and continuously.

The present invention will be described based on drawings showing embodiments thereof. FIG. 1 shows a side cross-sectional view of an apparatus for carrying out the method of forming fibers according to the present invention, in which heat-fusible resin (2) is uniformly mixed with appropriate fibers (1) in the required amount. The heated fiber aggregate (3) is transported and inserted into a hot air furnace A having a hot air generator (9) using a weighing conveyor (4), and heated air is permeated into the fiber aggregate (3) in the hot air furnace A. Seshime, fiber (1)
and resin (2) are slightly heat-sealed and cured to form a complex fiber-tethered felt 1-(5), and further this felt (5)
During the transfer and insertion into the mold hot press B, the fiber aggregate (3) is placed in the hot air stove A as described above using the weighing conveyor (4).
In the mold heat press B, the upper and lower molds (6, 6) engraved into an arbitrary shape are inserted between the heat presses (7, 7) fitted with the upper and lower molds (6, 6). The felt (5) of the fiber tie is subjected to high-pressure heat pressing to form the fiber (8) and resin (2) into a tangible form that is completely heat-fused and solidified (8) intermittently. Continuously repeat.

In this example, the weight of the fiber aggregate inserted into the hot air stove A is proportional to the required amount of the form of the subsequent mold heat press B. The visible molding pressure is due to the narrow and wide shape of the mold, which makes the gap between the parts rigid and hard.
The hall part has a felt-like elasticity that is easy to press and is flexible, and the second
In the figure (14), a shaped molded body C with unevenness shown in the figure is obtained.
is the clamping part, (15) is the light contact part, and the third part is a decorative board made by the method of the present invention with a sculptural pattern or protrusions, which is solidified by high-pressure thermosetting molding.Of course, the mold has a smooth surface. If it is molded, it becomes a flat plate, and if the heat and pressure are relaxed and the molding is shifted, a flexible felt can be obtained.

However, in the present invention, in the first manufacturing process, a mixture of appropriate fibers and thermofusible resin is passed through hot air No. 5 at a temperature of 120"C to 150"C to be lightly heat-sealed and cured. Then the temperature between the mold heat press is 240°
Complete heat fusion hardening and solidification is performed at a temperature of 270°C to 270°C, and this temperature difference is adjusted depending on the hardness of the material and product.

Furthermore, the method of the present invention allows production of intermittent molding in a series of simple continuous processes, which saves labor, and furthermore, since the fibers are molded only in the machine tank, there is no surplus waste material, making it economical. It is possible to provide uniform and excellent molded products using a standard manufacturing method.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view explaining an embodiment of the manufacturing method according to the present invention, FIGS. 2 and 3 are embodiments manufactured by the method of the present invention, FIG. 2 is a sectional view, and FIG. is a perspective view. A...Hot stove, B...Mold heat press, C, D...
Molded object, 1... Fiber, 2... Resin 3... Fiber aggregate, 4... Weighing conveyor 5... Felt, 6.6...
・Mold, No. 6

Claims (1)

[Claims] A fiber aggregate made of a blend of natural fibers or synthetic fibers mixed with a heat-fusible resin is transported and inserted into a hot blast stove A, and heated air is passed through the fiber aggregate in the hot blast stove A to slightly fuse the fibers and resin. A fiber molded product characterized by being entangled to form a felt shape, and then transferred and inserted into a heat press B having upper and lower molds, and subjected to high-pressure heat pressing to fuse and solidify it into a tangible form. Production method.