JP2570782Y2 - Slush mold cooling device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a cooling device for a slush molding die, and more particularly to a measure for preventing a cooling medium from flowing around a molding surface.

[0002]

2. Description of the Related Art Conventionally, for example, door trims as interior parts for automobiles are provided with a sheet-like skin material on the surface from the viewpoint of improving appearance. In general, the skin material is formed by a vacuum forming method in which a heat-softened sheet-like material is brought into close contact with a forming die by vacuum evacuation and then cooled and solidified to form a predetermined shape, and a shell-shaped forming method. It can be broadly classified into a slush molding method in which a sheet-like material formed into a predetermined shape is obtained by, for example, adhering and melting a powder resin material on a mold.

In the latter slush molding method,
After forming a sheet-like material such as a skin material, the slash mold with the sheet-like material attached thereto was set in a cooling box of a cooling device with the molding surface facing outward, and provided in the cooling box. In general, a cooling medium is sprayed from a nozzle toward the back surface of the slush mold to cool the slush mold (Japanese Patent Laid-Open No. 61-25 / 1986).
No. 811).

In such a cooling device, it is necessary to prevent the cooling medium from flowing around the molding surface side of the slush molding die. For example, the outer periphery of the slush molding die is clamped by a clamp jig and the cooling box is cooled. To the open end of the box. In this way, the outer peripheral portion of the slash molding die is pressed against the box opening end of the cooling box to seal between the two, because when the cooling medium goes around the molding surface side, water droplets of the cooling medium are prepared for the next molding. When the posture of the molding surface is changed downward, the molding surface flows to the molding surface, and the molding surface is stained by the scale, and thereafter, the scale is attached to the surface of the sheet-like material formed thereafter, thereby deteriorating the commercial value. .

[0005]

However, even if the outer peripheral portion of the slush molding die is pressed against the box opening end of the cooling box as described above, there is generally a problem in the production of the outer peripheral portion of the slush molding die. It is difficult to completely seal the space between the slush mold and the cooling box due to slight irregularities from the cooling medium, and the cooling medium leaks from between the two and goes around to the molding surface side, and the water droplets flow to the molding surface Sometimes.

[0006] The present invention has been made in view of such a point, and an object of the present invention is to provide a sealing material at an opening end of a cooling box so that a cooling medium leaks out of the cooling box. In order to prevent the cooling medium from flowing around the molding surface.

[0007]

Means for Solving the Problems In order to achieve the above object, a solution of the present invention is to provide a cooling device for cooling a slash mold after molding a slash mold for supplying a resin material to a molding surface and molding a sheet. A cooling box is provided for supporting the slush mold in a state in which the outer periphery of the mold is in contact with the opening end of the box so as to have a space behind the slush mold. Further, cooling means for spraying a cooling medium on the back surface of the slush mold to cool the slush mold is provided in the cooling box. Further, a cylindrical flexible sealing material into which a compressed gas is supplied is provided at the box opening end of the cooling box so as to be sandwiched between the box opening end and the outer peripheral portion of the slash molding die. In addition, a plurality of discharge ports for discharging a compressed gas toward the rear surface of the slash mold are formed in the flexible seal material.

[0008]

With the above arrangement, in the present invention, compressed gas is supplied to the flexible sealing material provided at the box opening end of the cooling box, and the flexible sealing material expands. As a result, the expanded flexible sealing material is strongly pressed against the outer peripheral portion of the slash molding die, and even if there is slight unevenness on the outer peripheral portion of the slash molding die, the space between the slash molding die and the cooling box is completely completed. The cooling medium is reliably prevented from leaking out of the cooling box, and the cooling medium does not flow around the molding surface.

Further, the supplied compressed air is discharged from the plurality of discharge ports of the flexible sealing material toward the back surface of the slash forming die. As a result, water drops of the cooling medium adhering to the back surface of the slash mold are blown off by the force of the compressed air, and the amount of water droplets adhering to the back surface of the slash mold becomes extremely small. Even if the posture is changed, water droplets do not flow to the molding surface.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 3 to 5 show a cooling device 1 according to an embodiment of the present invention. The cooling device 1 forms a slush molding die S for melting a powder resin raw material R (shown in FIG. 2) supplied to a molding surface s3 by a mold temperature to form a sheet-like material R 'such as a skin material. It is a device for cooling later.

3 and 5, reference numeral 3 denotes a rectangular parallelepiped cooling box having an upper opening, and a plurality of (only two are shown in FIG. 3) outside the box opening end 3a of the cooling box 3. Clamp jigs 5, 5, ... are arranged,
The outer peripheral portion s of the slash forming die S is formed by each of the clamp jigs 5
The slash forming die S is supported by holding the die outer peripheral portion s1 in contact with the box opening end 3a so as to have a space with the back surface s2 of the slash forming die S by sandwiching the slash forming die S. .

A plurality of (two shown in FIG. 3 and FIG. 5) nozzles 7, 7,... As cooling means are arranged in the cooling box 3, and a cooling medium as a cooling medium is provided from each nozzle 7. The slush mold S is cooled by spraying water W on the back surface s2 of the slash mold S.

As a feature of the present invention, a plurality of cylindrical flexible sealing members 9 made of a flexible material such as rubber having a hollow portion 9a are provided at the box opening end 3a of the cooling box 3. The flexible seal material 9 is attached to the box opening end 3a and the outer peripheral portion s of the slash molding die S in a state where the slash molding die S is set.
It is made to be sandwiched between 1. The flexible sealing material 9 is connected to a compression pump (not shown) via a connection pipe 13, and compressed air A as compressed gas is supplied to the hollow portion 9 a of the flexible sealing material 9 from the compression pump. The flexible sealing material 9 is configured to expand by the air pressure of the compressed air A.

Further, a plurality of discharge ports 9b, 9b,... Are formed at predetermined intervals inside the cooling box 3 of the flexible sealing material 9 so as to communicate with the hollow portion 9a.
The compressed air A supplied to the hollow part 9a is
By discharging from the b toward the back surface s2 of the slush mold S, the water droplets w1, w1,... of the cooling water W adhering to the back surface s2 are blown off. In FIG. 3, reference numeral 15 denotes a drain pipe for discharging the cooling water W accumulated in the cooling box 3 to the outside.

Next, a procedure for slush-forming the sheet-like material R 'by using the cooling apparatus 1 having the above-described structure in a cooling step will be described.

First, as shown in FIG. 1, the slash forming die S is held by the hanger 17 with the forming surface s3 facing downward, and the forming surface s is formed by the heater 19 disposed below.
3 is heated to the specified temperature.

Next, as shown in FIG. 2, the heated slush mold S is set in the raw material supply box 21 so as to cover the opening thereof with the molding surface s3 facing downward,
A plurality (only two appear in FIG. 2) of clamp jigs 23,
23,... Sandwich the outer peripheral portion s1 of the slash forming die S.

Thereafter, the raw material supply box 21 is turned upside down by 180 ° by rotating a pair of rotating shafts 25 (only one of which is shown in FIG. 2) by a rotating device (not shown). The molding surface s of the slash molding die S is obtained by mixing the powder resin raw material R contained in
Attach to 3. As a result, the powder resin raw material R adhered to the molding surface s3 is heated and melted at the mold temperature to form the sheet-like material R '
(Shown in FIG. 3) are formed.

After that, the raw material supply box 21 is turned upside down by 180 °, and the surplus powder resin raw material R is dropped into the raw material supply box 21, and as shown in FIG.
The slash forming mold S to which the sheet-like material R 'is attached is rotated by a pair of rotating shafts s (only one is shown in FIGS. 1 to 3).
4 and s4 are rotated by a rotating device (not shown) so as to be turned upside down by 180 °, and set in the cooling box 3 with the forming surface s3 facing upward so as to cover the openings thereof. , Slash mold S
Of the mold outer periphery s1.

Then, cooling water W is sprayed from the nozzles 7, 7,... Arranged in the cooling box 3 onto the back surface s2 of the slash forming die S, so that the slash forming die S (sheet-like material R
´) cool.

Thereafter, as shown in FIG. 4, the compression pump is operated to compress the compressed air A into the hollow portion 9a of the flexible sealing material 9.
To expand the flexible sealing material 9 and strongly press it against the outer peripheral portion s1 of the slash molding die S. Therefore, even if there are slight irregularities in the outer peripheral portion s1 of the slush molding die S, the space between the slash molding die S and the cooling box 3 can be completely sealed, and the leakage of the cooling water W to the outside of the cooling box 3 is ensured. And the spillage of the cooling water W to the molding surface s3 side can be eliminated.

At the same time, the compressed air A supplied to the hollow portion 9a of the flexible sealing material 9 is discharged from the outlets 9b and 9b.
b,... are discharged toward the back surface s2 of the slush mold S, and due to the force of the compressed air A, the water droplets w1, w1 of the cooling water W adhering to the back surface s2 of the slash mold S.
, ... are blown off and the back surface s2 of the slash mold S
The amount of water droplets w1 adhering to the surface becomes extremely small.

Thereafter, as shown by the imaginary line in FIG. 3, after the sheet-like material R 'is released, the clamping force of each clamp jig 5 is released, and the slash forming mold S is lifted from the cooling box 3 and the next time. Is changed so that the molding surface s3 faces downward in preparation for molding. At this time, the back surface s2 of the slash mold S
Since the water droplets w1, w1,... Of the cooling water W adhering to the slash mold S are blown off by the air pressure of the compressed air A and become extremely small, the water droplets w1, w1,. Flow can be eliminated.

[0025]

[Effects of the Invention] As described above, according to the present invention,
Since a cylindrical flexible sealing material into which compressed gas is supplied is provided at the opening end of the cooling box, a space between the slash forming die and the cooling box is formed by expansion of the flexible sealing material by the supply of compressed air. By completely sealing, the cooling medium can be reliably prevented from leaking out of the cooling box, and the cooling medium can be prevented from wrapping around the molding surface. Further, since a plurality of discharge ports for discharging the compressed gas toward the back surface of the slush molding die are formed in the flexible sealing material, the force of the compressed gas discharged toward the back surface of the slash molding die from each of the discharge holes is provided. Water droplets of the cooling medium adhering to the back surface of the slush molding die are blown off, and the flow of the water droplets to the molding surface when the posture is changed can be eliminated.

[Brief description of the drawings]

FIG. 1 is a drawing showing a heating process of a slush molding die.

FIG. 2 is a process diagram showing a state in which a slush mold is set in a raw material supply box.

FIG. 3 is a diagram illustrating a cooling process of a slush molding die.

FIG. 4 is an enlarged view of a portion B in FIG. 3;

FIG. 5 is a perspective view showing a cooling device with a part thereof omitted;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling device 3 Cooling box 3a Box opening end 7 Nozzle (cooling means) 9 Flexible sealing material 9b Discharge port A Compressed air (compressed gas) R Powder resin raw material R 'Sheet material S Slash molding die s1 Mold outer peripheral portion s2 back surface s3 molding surface W cooling water (cooling medium)

Claims (1)

(57) [Scope of request for utility model registration] 1. A cooling device for cooling a slash mold after molding a sheet material by supplying a resin material to a molding surface, wherein the outer peripheral portion of the mold has a space and a back surface of the slush mold. A cooling box that supports the slush mold in a state where the slash mold is in contact with the box opening end, cooling means provided in the cooling box, and cooling the slash mold by spraying a cooling medium on the back surface thereof; A box-shaped flexible sealing material provided at the box opening end so as to be sandwiched between the box opening end and the outer peripheral portion of the slash molding die, and a compressed gas is supplied therein;
A cooling device for a slash molding die, wherein a plurality of discharge ports for discharging a compressed gas toward the back surface of the slash molding die are formed in the flexible sealing material.