JP3005610B2 - Molds for sound pickup materials, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for a sound-absorbing material or the like for efficiently producing a sound-absorbing material or the like attached to the back of an elevated road, for example.

[0002]

2. Description of the Related Art Conventionally, this kind of sound collecting material is generally formed using glass wool as a molding material in order to enhance its effect. More specifically, glass wool is impregnated with a resin to form a plate, and then the plate is bent by heating and pressing to form a sound-collecting material having a desired cross-sectional shape.

[0003]

However, in the conventional sound-collecting material, a plate-like body is first formed, and then the plate-like body is moved to another place and bent by heating and pressing to obtain a desired shape. Since work is performed at two places, such as molding, there is a problem that molding is troublesome, takes time, cannot be efficiently performed, and the production cost is increased. Therefore, the present invention has been made in order to solve the problems seen in such conventional techniques, and can be formed efficiently,
It is an object of the present invention to provide a molding die such as a sound-absorbing material that can reduce the product cost.

[0004]

In order to achieve the above object, the present invention relates to a molding die for a sound-absorbing material or the like which forms a molded product having a required cross-sectional shape and made of a molding material of a fibrous layer such as glass wool. A pair of a male mold and a female mold, wherein the male mold is movable and is provided so as to be able to freely contact and separate from the female mold. The body and the other half are divided and formed. When the one half and the other half are tilted, the opening on the male side expands and when the two halves are erected, the inner surfaces of the two halves are male outer surfaces. The male and female dies are provided with a plurality of through holes for passing hot air for heating and curing the molding material filled between the two dies.

[0005] One side half and the other half of the female mold are tilted so that the opening on the male mold side is widened, and the female mold is impregnated with glass wool as a molding material in a resin. Fill. Next, the male mold is moved and stopped at a predetermined position, and the one half and the other half are erected. Further, the male mold is moved to a predetermined position, and in this state, the molding material is heated and pressed while hot air is blown out from a large number of transmission holes to form the molding material. As described above, by using a molding die such as a sound collecting material, the sound collecting material can be efficiently formed at one time, and the product cost can be reduced.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a mold for a sound-collecting material according to the present invention. FIG. 1 is a front cross-sectional view of a molding die such as a sound collecting material, and FIG. 2 is a front cross-sectional view of the male die portion. The molding die of the sound pickup material or the like is mainly composed of a combination of a pair of a male mold and a female mold. As shown in FIG. 1, a molding frame 2 having a rectangular parallelepiped shape is installed on the upper surface of the machine base 1, and a support frame 3 a having an open upper surface is installed in the machine frame 2. A leg 4 is erected at the center of the bottom surface of the frame 3a. Reference numeral 5 denotes a female mold which is formed into a symmetrical half-side half 5a and a half-side half 5b, and the lower ends of the inside of the half-side half 5a and the half-side half 5b are respectively formed by the legs 4 It is connected to the upper end by a support shaft 6, and is capable of tilting between a state in which the male side opening 5c shown in FIG. 1 is tilted to the left and right so as to widen and an upright state shown in FIG. The one-side half 5a and the other-side half 5b are formed in a vertically long shape, and U-shaped main parts 7a and 7b are formed in the lower part thereof on the inner surfaces thereof, and the main parts 7a and 7b are formed. Linear sliding portions 9a, 9b orthogonal to the horizontal steps 8a, 8b are formed on the upper side via the horizontal steps 8a, 8b. The one side half 5a and the other half 5b are reinforced with support plates 10 at their outer surfaces at appropriate locations in the longitudinal direction.

Numerals 11 and 11 denote hydraulic cylinders arranged on the left and right sides of the machine frame 2, respectively. The lower ends of the hydraulic cylinders are supported by shafts 13 and 13 protruding from the left and right sides of the machine frame 2. Are fixed to the upper surfaces of the supporting members 14, 14. And the rod 1 of both hydraulic cylinders 11, 11
The front end portions of the support frame 3a face the inside through insertion holes 16 provided on both side walls of the support frame 3a.
a and the upper half of the other half 5b. In this manner, the tip portions of the rods 15, 15 are pivotally connected, and the hydraulic cylinders 11, 11 are pivotally supported, so that the two halves 5a, 5b can smoothly tilt and stand.

As shown in FIGS. 1 and 2, hydraulic cylinders 17, 17 are installed vertically on the upper part of the machine casing 2,
A support frame 3b, which is symmetrical to the support frame 3a, is supported at the distal ends of rods 18, 18 protruding downwardly or contractably from the hydraulic cylinders 17, 17, respectively. At the center of the lower surface of the support frame 3b, a hollow male mold 19 forming a pair with the female mold 5 is fixed. The male mold 19 is hollow and vertically elongated, and has a rectangular cross section. The male mold 1
The left and right sides 9 of the female mold 5 have one half 5a and the other half 5b
Is set up so as to come into contact with the sliding contact portions 9a, 9a in a state of being raised.

Reference numeral 20 denotes the male mold 1 in the center of the male mold 19.
9 is an auxiliary male type which is inserted through an extraction hole 19b provided in a bottom wall 19a of the ninth and is disposed so as to protrude downward from the extraction hole 19b. The upper end surface is open. Reference numeral 21 denotes a hydraulic cylinder vertically installed at the center of the upper surface of the support frame 3b, and a rod 22 projecting from the lower end surface into the male mold 19.
Is fixed to a holding plate 20a which is extended over the upper end surface of the auxiliary male mold 20. The shape of the male mold 19 including the female mold 5 and the auxiliary male mold 20 is not limited to these, and can be freely changed depending on the molded product.

The tips of the rods 18, 18 of the two hydraulic cylinders 17, 17 are connected to supports 23, 23 fixed to the upper surface of the support frame 3b, and the male mold 19 is extended as the rods 18, 18 expand or contract. Is lowered or raised. A hot air pipe 24 is connected to the male mold 19, and hot air is supplied into the male mold 19 from a hot air source (not shown) via the hot air pipe 24. The hot air in the male mold 19 is supplied to the auxiliary male mold 20 through the upper opening.
Also enter.

The female mold 5, the male mold 19, and the auxiliary male mold 20 are each formed to a required length according to the length of the molded product.
Further, a large number of transmission holes 25 are provided in substantially the entirety of the one half 5a and the other half 5b of the female mold 5, the bottom wall 19a of the male mold 19, and the outer peripheral wall of the auxiliary male mold 20. So, male type 19
Move to form a molded product by joining with the female mold 5, the hot air sent from the hot air pipe 24 into the male mold 19 is discharged from the respective through holes 25, 25... Of the male mold 19 and the auxiliary male mold 20.
After the molded article is heated, it is released from each of the perforated holes 25 of the female die 5 and is further opened through the bottom of the support frame 3a.
Emitted from 6, 26 to the outside.

Next, a method of molding a molded article using the thus-configured mold of the sound-collecting material of the present invention will be described. First, as shown in FIG.
The female mold 5 is filled with a required amount of a glass wool molding material F impregnated with a phenol resin in a state where the a and the other half 5b are tilted left and right so that the opening 5c on the male mold 19 side is widened. . Next, the rods 18 and 18 of the two hydraulic cylinders 17 and 17 are extended to move or lower the male mold 19 to the position shown in FIG. 3, and the rod 22 of the hydraulic cylinder 21 is extended and the auxiliary male mold 20 is extended. Is lowered to a predetermined position. This also holds down the molding material F. Furthermore, as shown in FIG.
Then, the other half 5b is erected to bring the sliding portions 9a, 9b on the inner surface of the female mold 5 into contact with the left and right outer surfaces of the male mold 19.

Finally, as shown in FIG.
While leaving 0 as it is, the male mold 19 is lowered until the left and right lower end surfaces of the support frame 3b thereof are in contact with the left and right upper end surfaces of the support frame 3a on the female mold 5 side to press the molding material F. And
In this state, hot air is supplied into the male mold 19 and the auxiliary male mold 20 via the hot air pipe 24. The supplied hot air is blown out from the bottom wall 19a of the male mold 19 and the through holes 25 of the auxiliary male mold 20 into the inside of the layer of the molding material F as shown by arrows in FIG. Is cured by heating. The hot air then passes through the through holes 25 of the one half 5a and the other half 5b of the female mold 5, and is further discharged to the outside through the opening 26 on the bottom surface of the support frame 3a. The hot air discharged outside the support frames 3a and 3b may be collected, heated and reused. Finally, as shown in FIG. 6, the male mold 19 is raised together with the auxiliary male mold 20 to return to the original position, and the one half 5a and the other half 5b of the female mold 5 are tilted to open the opening 5c. A molded product G molded into a substantially inverted U-shaped cross section is obtained.

In this manner, the male mold 19 is lowered in advance to a predetermined position, and the tilted one half 5a and the other half 5b of the female mold 5 are erected so that the outer surface of the male mold 19 and the female mold 5 The male mold 19 is moved after the inner surface of the
Is heated and pressurized, so that glass wool is less likely to bite between the outer surface of the male mold 19 and the inner surface of the female mold 5. Further, since the female mold 5 can be expanded, the glass wool, which is the molding material F, penetrates into every corner of the inner surface of each of the half-side halves 5a and 5b, and finally, the appearance as the mold is obtained. A good molded product G is obtained. When hot air is supplied, both the male mold 19 and the female mold 5 are surrounded by the two supporting frames 3a and 3b, so that the hot air does not radiate to the surroundings. There is no danger of hot air hitting and burning.

As is clear from the above description, the use of the molding die of the sound-absorbing material of the present invention makes it possible to perform once from the supply of the molding material to the completion of the molded product G as shown in FIGS. , The productivity is remarkably improved. Although the present invention has been described with respect to the sound-absorbing material, the present invention can be used for molding a molded product for other uses as long as a fibrous material such as glass wool is used.

[0016]

According to the present invention, the molding die of the sound-absorbing material or the like has the above-mentioned construction, and the female die can be opened by tilting the one half and the other half, so that the molding material such as glass wool is used. Is easy to supply and the appearance of the molded product is good. In addition, the male mold is lowered to match the female mold, and hot air is further supplied to heat and pressurize the molding material to form a molded product. This has the effect of not only improving the productivity of the molded article but also significantly reducing the manufacturing cost.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a molding die for a sound-absorbing material or the like according to the present invention.

FIG. 2 is a front sectional view of the male mold part.

FIG. 3 is a schematic explanatory view showing the operation of a molding die such as a sound collecting material.

FIG. 4 is a schematic explanatory view showing the operation of a molding die such as a sound collecting material.

FIG. 5 is a schematic explanatory view showing the operation of a molding die such as a sound collecting material.

FIG. 6 is a schematic explanatory view showing the operation of a molding die such as a sound collecting material.

[Explanation of symbols]

 5 Female mold 5a One side half 5b The other half 5c Opening 19 Male mold 25 Transmission hole G Molded product F Molding material

Claims (1)

(57) [Claims] 1. A molding die such as a sound pickup material for molding a molded product made of a molding material of a fibrous layer such as glass wool,
It is composed of a pair of a male mold and a female mold, the male mold is movable and provided so as to be able to contact and separate from the female mold, and the female mold is divided into one half and the other half, The one half and the other half are pivotally supported so that the opening on the male side expands when tilted and the inner surface of both halves abuts the outer surface of the male when standing upright. A molding die for a sound-collecting material or the like, characterized in that a number of transmission holes are provided in the mold and the female die for passing hot air for heating and curing the molding material filled between the two dies.