JPH0617915U - Slush mold cooling device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the cooling medium from wrapping around to the molding surface side so as not to interfere with subsequent molding. [Structure] A slush molding die S is placed on a back surface s2 of a slush molding die S in a cooling box which supports a die outer peripheral portion s1 of the slush molding die S via a die support plate 7 so as to have a space 19 and a back surface s2. A nozzle for spraying cooling water to cool is provided. First and second ridges made of an elastic material so as to be sandwiched between the mold support plate 7 of the cooling box and the mold outer peripheral portion s1 of the slush molding mold S, and made of elastic material at predetermined intervals in the inside and outside of the box 23 and 25 are provided. Cooling the supply port 31 for supplying the compressed air A to the closed space 29 formed between the first ridge 23 and the second ridge 25 with the die outer peripheral portion s1 of the slush molding die S supported by the cooling box. It is provided on the mold support plate 7 of the box.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a cooling device of a slush molding type, and particularly to a measure for preventing a cooling medium from wrapping around a molding surface.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, for example, a door trim as an automobile interior component is provided with a sheet-like skin material on the surface from the viewpoint of improving the appearance. This skin material is generally formed by a vacuum forming method in which a heat-softened sheet material is brought into close contact with a forming die by evacuation and then cooled and solidified to form a predetermined shape, and a shell shape is formed. Further, it can be roughly classified into a slush molding method in which a powdered resin raw material is adhered and melted to a molding die to obtain a sheet-shaped article molded into a predetermined shape.

By the way, in the latter slush molding method, after a sheet material such as a skin material is molded, a slush mold with the sheet material adhered is cooled by a cooling device in a posture with a molding surface facing outward. It is generally practiced that the slush mold is set in a box, and a cooling medium is sprayed from a nozzle provided in the cooling box toward the back surface of the slush mold to cool the slush mold (Actual No. Sho 64-27211). (See the official gazette).

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 peripheral portion of the slush molding die is clamped by a clamp jig to cool the slush molding die. It is pressed against the mold support plate of the box. In this way, the outer peripheral part of the slush mold is pressed against the mold support plate of the cooling box to seal between the two, because when the cooling medium wraps around the molding surface side, water droplets of the cooling medium prepare for the next molding. When the posture of the molding surface is changed downwards, the molding surface may flow and stain the molding surface due to water stains, and then water stains may adhere to the surface of the sheet-like molded product and damage the product value. Because it will be.

[0005]

[Problems to be solved by the device]

 However, even if the outer peripheral portion of the slush mold is pressed against the mold support plate of the cooling box as described above, the outer peripheral portion of the slush mold generally has slight irregularities due to manufacturing problems. It is difficult to completely seal between the slush mold and the mold support plate of the cooling box, and the cooling medium may leak from between the two and flow around to the molding surface side, and the water droplets may flow to the molding surface.

The present invention has been made in view of the above points, and an object of the present invention is to appropriately place a sealing material on a mold support plate of a cooling box so that a cooling medium can flow around to a molding surface side. This is to prevent any trouble in subsequent molding.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is intended for a cooling device that cools after molding a slush mold that supplies a resin material to a molding surface to mold a sheet-like object, and has taken the following means for solving the problems. .

That is, the solution means of the present invention has a mold support plate on the side of the box opening, and the mold outer peripheral portion of the slush mold is interposed via the mold support plate so as to have a space with the back surface of the slush mold. Provide a cooling box to support. Further, a cooling means for spraying a cooling medium on the back surface of the slush mold to cool it is provided in the cooling box. Further, the first and second ridges made of an elastic material are sandwiched between the mold supporting plate of the cooling box and the mold outer peripheral portion of the slush molding mold, and a predetermined space is provided inside and outside the box. Set up. In addition, the cooling box is provided with a supply port for supplying compressed gas to the closed space formed between the first ridge and the second ridge with the outer peripheral portion of the slush molding die supported by the cooling box. It is characterized in that it is provided on the die support plate.

[0009]

With the above-described structure, in the present invention, during molding, pressure is applied to the closed space formed between the first ridge and the second ridge with the outer peripheral portion of the slush mold being supported by the cooling box. Condensed gas is supplied from the supply port. As a result, the internal pressure of the closed space increases, and the cooling medium is prevented from trying to wrap around from the outside of the outer periphery of the slush molding die to the molding surface side by the internal pressure of the closed space. There is no turning around on the surface.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

3 to 5 show a cooling device 1 according to an embodiment of the present invention. This cooling device 1 is a device for cooling the slush molding die S after molding, which melts the powdered resin raw material supplied to the molding surface s3 at the mold temperature to mold the sheet-like material R such as a skin material. .

In FIGS. 3 and 5, reference numeral 3 denotes a substantially rectangular parallelepiped cooling box that is installed on the base 5 and has an opening at the top, and the cooling box 3 has a rectangular opening 7 a on the side of the box opening 3 a. A rectangular ring-shaped die support plate 7 is rotatably supported by rotary shafts 9 and 9 and one of the rotary shafts 9 and 9 is a motor installed on the base 5. 11 is driven and connected via a pulley 13 and a belt 15, and the mold support plate 7 is rotated by the motor 11 so that the molding surface s3 of the slush molding mold S faces the inside of the cooling box 3 as shown in FIG. The slush mold S is rotated so that the rear surface s2 of the slush molding die S faces the inside of the cooling box 3 as shown in FIG.

Further, four clamp jigs 17, 17, ... Are arranged on the mold support plate 7, and by clamping the mold outer peripheral portion s1 of the slush molding mold S between the clamp jigs 17, the slash The outer peripheral portion s1 of the slush molding die S is supported by the cooling box 3 via the die support plate 7 so that a space 19 is provided between the back surface s2 of the molding die S and the cooling box 3.

Nozzles 21, 21, ... As three cooling means are arranged in the cooling box 3, and cooling water W as a cooling medium is sprayed from each nozzle 21 onto the back surface s2 of the slush molding die S. By doing so, the slush mold S is cooled.

Further, as shown in enlarged detail in FIGS. 1 and 2, as a feature of the present invention, the mold supporting plate 7 of the cooling box 3 is provided with first and second ridges 23 made of an elastic material such as rubber. , 25 are attached by mounting members 27, 27 so as to surround the opening 7a of the mold support plate 7, and the first and second ridges 23, 25 are set in the slush molding mold S while the mold support plate 7 is set. And the outer peripheral portion s1 of the slush molding die S. The first and second ridges 23 and 25 are arranged parallel to each other in the box inner and outer directions at a predetermined interval, and the first outer peripheral portion s1 of the slush molding die S is supported by the cooling box 3 to form the first ridge. A closed space 29 is formed between the ridge 23 and the second ridge 25.

Further, two supply ports 31, 31 for supplying compressed air A as a compressed gas are arranged between the first ridge 23 and the second ridge 25 of the mold support plate 7 of the cooling box 3. Now, the supply ports 31, 31 are connected to a compression pump (not shown) through supply hoses 33, 33 penetrating one of the rotary shafts 9, and the mold outer peripheral portion s1 of the slush molding mold S is cooled by the cooling box 3. The compressed air A is supplied from the compression pump to the closed space 29 in a state of being supported by the above, so that the internal pressure of the closed space 29 is increased.

Further, each of the first and second ridges 23, 25 is formed with an outwardly extending lip portion 23a, 25a, and as shown in FIG. 1, a slush molding die S has an outer peripheral portion s1. While being supported by the cooling box 3, the lip portions 23a and 25a are brought into close contact with the die outer peripheral portion s1 of the slush molding die S. The shape of the lip portion 23a of the first protrusion 23 allows a part of the compressed air A in the closed space 29 to be ejected from the mold, and makes it difficult for water droplets of the cooling water W to enter from the mold. Further, the shape of the lip portion 25a of the second protrusion 25 makes it difficult for the compressed air A in the closed space 29 to enter the molding surface s3 of the slush molding die S. In FIGS. 4 and 5, 35 is a supply hose for supplying the cooling water W to each nozzle 21, and 37 is a drain hose for discharging the cooling water W accumulated in the cooling box 3 to the outside.

Next, the procedure for cooling the slush mold S using the cooling device 1 configured as described above will be described.

First, as shown in FIG. 4, a slush molding die S to which the molded sheet-like material R is attached is supported in a posture such that the molding surface s3 faces downward so as to cover the box opening 3a of the cooling box 3. It is set on the plate 7, and the outer peripheral portion s1 of the slush molding die S is clamped by the clamp jigs 17, 17, ....

Then, as shown in FIG. 5, the mold support plate 7 is rotated 180 degrees upside down by the rotational driving of the motor 11, and the slush molding mold S is held in a posture in which the back surface s2 is directed downward.

After that, the cooling water W is sprayed from the nozzles 21, 21, ... Arranged in the cooling box 3 onto the back surface s2 of the slush molding die S to cool the slush molding die S (sheet-like material R).

At this time, as shown in FIG. 1, the compression pump is operated to supply the compressed air A from the supply ports 31, 31 to the closed space 29 formed between the first protrusion 23 and the second protrusion 25. To raise the inside of the closed space 29. Therefore, it is possible to reliably prevent the cooling water W from wrapping around from the outside of the outer peripheral portion s1 of the slush molding die S to the molding surface s3 side by the internal pressure of the closed space 29, and the cooling water W molding surface s3 side. It is possible to eliminate the wraparound.

Since the lip portions 23a and 25a extending outward are formed on each of the first and second protrusions 23 and 25, the outer peripheral portion s1 of the slush molding die S is supported by the cooling box 3. In this state, the lip portions 23a and 25a come into close contact with the outer peripheral portion s1 of the slush molding die S, and the shape of the lip portion 23a of the first ridge 23 causes a portion of the compressed air A in the closed space 29 to move out of the die. The water droplets of the cooling water W can be made difficult to intrude from the outside of the mold. Further, the shape of the lip portion 25a of the second protrusion 25 makes it difficult for the compressed air A in the closed space 29 to wrap around the molding surface s3 of the slush molding die S. Therefore, these can more effectively prevent the cooling water W from wrapping around to the molding surface s3 side.

Thereafter, as shown in FIG. 4, the mold support plate 7 is inverted 180 ° in the vertical direction by the rotational driving of the motor 11 to hold the slush molding mold S in a posture with the back surface s 2 facing upward, After releasing the clamping force of the clamp jigs 17, 17, ..., The shafts s4, s4 of the slush molding die S are engaged with a hanger (not shown) and lifted, and the slush molding die S is removed from the cooling box 3. After that, the attitude of the slush molding die S is changed so that the molding surface s 3 faces upward, and the sheet material R is demolded.

[0025]

[Effect of device]

 As described above, according to the present invention, the mold supporting plate of the cooling box is provided with the first and second ridges made of the elastic material and the compressed gas supply port, and the outer peripheral portion of the slush molding mold is used as the cooling box. Since compressed gas is supplied from the supply port to the enclosed space formed between the first and second ridges in a supported state, the outer peripheral portion of the slush molding die is caused by the internal pressure of the enclosed space. It is possible to reliably prevent the cooling medium from wrapping around from the outside to the molding surface side, and to prevent the cooling medium from wrapping around the molding surface.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing first and second ridge portions in a state where a slush molding die is set on a die support plate.

FIG. 2 is a vertical cross-sectional view showing first and second ridge portions of a mold support plate.

FIG. 3 is a perspective view of a cooling device.

FIG. 4 is a process diagram of setting a slush mold in a cooling box.

FIG. 5 is a cooling process diagram of a slush mold.

[Explanation of symbols]

 1 Cooling Device 3 Cooling Box 3a Box Opening 7 Type Support Plate 19 Space 21 Nozzle (Cooling Means) 23 First Projection 25 Second Projection 29 Closed Space 31 Supply Port A Compressed Air (Compressed Gas) R Sheet Material S Slash Molding die s1 Mold outer periphery s2 Rear surface s3 Molding surface W Cooling water (cooling medium)

Claims (1)

[Scope of utility model registration request] 1. A cooling device for supplying a resin raw material to a molding surface to cool a slush molding die for molding a sheet-like material after the molding, having a die support plate on the box opening side, A cooling box that supports the outer peripheral portion of the slush molding die through the die support plate so as to have a back surface and a space, and a cooling box that is provided in the cooling box and blows a cooling medium to the back surface of the slush molding die to cool it. A cooling means and a mold supporting plate of the cooling box, which is sandwiched between the mold supporting plate and the outer peripheral part of the slush molding mold, and which is provided at a predetermined interval in the inside and outside directions of the box and is made of an elastic material. And the second ridge and the mold support plate of the cooling box, which are formed between the first and second ridges with the outer periphery of the slush mold supported by the cooling box. Closed sky A slush-molding type cooling device comprising a supply port for supplying a compressed gas therebetween.