JPH0736467A - Production of sound-proof parts - Google Patents

Abstract

PURPOSE:To solve cost effectiveness and hygienic problems by splashing of resin powder and to make the quality of products constant and stable by incorporating and dispersing fiber components into a water-soluble resin dispersing soln. CONSTITUTION:These sound-proof parts are formed by mixing the fiber components and the water-soluble resin dispersing soln. and applying the mixture on molds having desired shapes, then drying the coating. The fiber component- dispersing liquid formed by using the resin dispersing soln. prepd. in such a manner that the resin components are incorporated at 5 to 50g ratio in 100g fiber components is preferably used. The discontinuous fiber components to be used are preferably properly selected by a desired bulk height and performance and these fiber components to be used may be of one kind or >=2 kinds. Such water-soluble resin dispersing soln. is applied on the inside surfaces of, for example, metal molds by a coating machine, such as mortar gun or lithin gun and is heated to remove moisture, by which a bulky non-woven fabric or felt is formed on the inside surfaces of the metal molds. The metal molds are thereafter passed through an oven at need to preferably cure the thermosetting resin at a prescribed temp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a soundproofing part, and more particularly, it is possible to prevent the fiber component from scattering during the manufacture of the soundproofing part and to uniformly disperse the resin component in the fiber component. The present invention relates to a method of manufacturing a soundproof component molded into a shape.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a soundproofing component, a thermosetting resin or a thermoplastic resin powder is sprinkled and mixed into a fiber component in an opened state to form a fleece by a fleece molding machine, and then heating and pressing. It was molded.

However, in such a manufacturing method, since the powdered resin is used and the powdered resin is mixed into the fiber component by spraying, the resin powder is apt to scatter and the economy is poor, and the amount of the blended resin is not uniform. There is a problem that the product may not be stable and is not preferable in terms of hygiene.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a soundproof component by using a fiber component and a resin component.
When dispersing the resin component in the fiber component, the powder resin does not scatter or fall, resulting in a uniform product, and achieving a hygienic and stable product quality, and a method for manufacturing a soundproofing component. It is in.

[0005]

As a solution to this problem, the inventors of the present invention have conducted intensive studies and as a result, they have used a mixture of a fiber component and a water-soluble resin dispersion solution. Exists below.

The fiber component and the water-soluble resin dispersion solution are mixed,
A method for manufacturing a soundproofing component, characterized by being applied to a mold having a desired shape.

The fiber components used in the present invention include animal and vegetable fibers, inorganic fibers and synthetic resin fibers, specifically, wool, cotton, hemp, slag wool, glass wool, rock wool and viscose rayon. , Acetate, acrylic, nylon, polyester, vinyl chloride and the like. Needless to say, a fiber material obtained by opening industrial waste such as fluff, cotton wool, and fiber scraps can also be preferably used.

In the water-soluble resin dispersion solution used in the present invention, urethane resin, phenol resin, epoxy resin or the like can be used as the thermosetting resin. Examples of the thermoplastic resin include polyethylene resin, acrylic resin, vinyl chloride, SBR latex resin and the like.

Mixing a fiber component in a water-soluble resin dispersion solution,
One of the features is that they are dispersed, but specifically,
With 100 g of fiber component in the state of being soundproof parts,
It is preferable to prepare a dispersion liquid containing a fiber component using a resin dispersion solution adjusted so that the resin component is mixed in a ratio of 5 to 50 g. It is preferable to select a discontinuous fiber component to be used as appropriate according to the desired bulkiness and performance.
You can use more than one kind. Resin component is 5g
If less than, it is not possible to secure a sufficient amount of resin in the soundproof parts,
There is a possibility that the bondability between the fibers may be poor, and if it exceeds 50 g, the economy is poor and it is not preferable.

The water-soluble resin dispersion solution is applied to the inner surface of the mold with a coating machine such as a mortar gun or a resin gun, and heated to remove moisture, thereby forming a bulky nonwoven fabric or felt on the inner surface of the mold.

In addition, it is also possible to recommend a method in which a resin dispersion solution in the form of a slurry is extruded and coated on the inner surface of the mold, and then heated in the same manner to remove water, thereby forming a bulky nonwoven fabric or felt on the inner surface of the mold.

[0012] In order to further remove excess water and resin components from the bulky nonwoven fabric or felt formed on the inner surface of the mold, it is then passed through an oven if necessary, and the thermosetting resin is cured at a predetermined temperature to give a thermoplastic resin. In this case, it is desirable to remove the remaining water.

[0013]

EXAMPLES The following examples are provided for a more detailed understanding of the present invention. Naturally, the invention is not limited to the following examples.

[0014]

Example 1 1000 g of a fiber component consisting of 35 parts by weight of polyester fiber and 65 parts by weight of cotton was mixed in a thermosetting resin solution consisting of 350 g of a water-soluble phenolic resin in solid content in 1000 g of water, and the dispersion was mixed with the fiber component. It became a liquid. The dispersion containing the fiber component was applied to the inner surface of the mold using a spray gun, the mold was removed, and the parts were taken out and passed through an oven at 200 ° C. for 10 minutes to obtain felt 1.

[0015]

Example 2 1000 g of a fiber component composed of 35 parts by weight of glass fiber and 65 parts by weight of polypropylene fiber was mixed in a thermoplastic resin dispersion liquid containing 350 g of acrylic resin in a solid content with respect to 1000 g of water. I said. After applying the dispersion liquid containing the fiber component to the inner surface of the mold with a spray gun, the mold is removed and the parts are taken out, and the temperature is 150 ° C.
It was passed through the oven for 10 minutes to obtain Felt 2.

[0016]

EFFECTS OF THE INVENTION The method of manufacturing a soundproofing component according to the present invention solves all the uneconomical problems caused by the resin powder falling from the net conveyor and the sanitary problems caused by the scattering of the resin powder, and the product quality is kept constant. Stabilized.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G10K 11/16 // B29K 105: 12

Claims (1)

[Claims] 1. A method for producing a soundproofing component, which comprises mixing a fiber component and a water-soluble resin dispersion solution, applying the mixture on a mold having a desired shape, and drying the mixture.