JPH0650171Y2 - Mold cooling device for slush molding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a slush molding die cooling device used for molding a skin material such as a pad provided on an instrument panel of an automobile.

(Prior Art) Conventionally, as a mold cooling device for slush molding, for example,
Those described in JP-A-63-183819 are known.

This conventional cooling device includes a swing arm that rotatably supports a mold, a rotation drive unit that rotates and holds the mold in a cooling posture with a product molding surface facing downward, and a cooling mechanism that cools the outer surface of the mold in a cooling posture. It had a structure including a cooling nozzle for jetting water from above.

(Problems to be Solved by the Invention) However, in the above-described conventional apparatus, the product molding surface faces downward in the cooling posture of the mold, so that heat is generated inside the recess forming the product molding surface during cooling. Since it is easy to remain and the cooling performance is bad, and the outer surface that receives the injection of cooling water faces upward,
Cooling water remains on the outer surface of the mold and the drainage of the cooling water is poor.Furthermore, since the cooling water is jetted downward from above, after cooling, water dripping from the cooling nozzle drips onto the mold and molded products. There was a problem of doing.

In addition, when the molded product is released from the mold, the mold is held in a demolding position with the molding surface of the product facing upward. It was necessary to rotate the mold from the cooling posture to the demolding posture, and there was a problem that the molding cycle was lengthened accordingly.

The present invention focuses on the above-mentioned conventional problems, and an object of the present invention is to provide a mold cooling device for slush molding which has good cooling properties and water drainage properties, and can shorten the molding cycle.

(Means for Solving the Problems) In order to achieve the above-mentioned object, in a mold cooling device for slush molding of the present invention, a mold having a product molding surface is formed,
A swing arm that rotatably supports the mold and that swings the mold between the in-furnace position and the out-furnace position of the heating furnace; and the mold that rotates with respect to the swing arm. When the mold is located outside the furnace, a rotation drive unit capable of holding the mold in a cooling and demolding posture in which a product molding surface is directed upward and a product take-out side end is inclined downward, and the mold. Of the evacuation position, which is provided below the outside position of the furnace, on which the material box is placed, and the cover position which covers the material box in a state of being lowered by the elevating table from above so as not to interfere with the elevating of the elevating table. A waterproof cover that is movable within a range, a cooling nozzle that is provided on the upper surface of the waterproof cover, and sprays cooling water upward from the outer surface of the mold in the cooling demolding posture; and the waterproof cover. Is provided at the front end of the A front edge seal cover whose position can be adjusted to cover the front edge of the prevention cover and the front edge of the prevention cover; and a rear edge of the mold, which is provided on the front surface of the heating furnace and is in the cooling demolding posture, and the front surface of the heating furnace. A trailing edge seal cover with a position adjustment that covers the space is provided.

(Operation) In the cooling device of the present invention, during cooling and subsequent demolding, the mold is held in the cooling demolding posture in which the product molding surface is upward and the product take-out side is inclined downward.

When cooling, cooling water is sprayed upward from below by a cooling nozzle onto the outer surface of the mold in this cooling demolding posture. After the mold is cooled in this way, the molded product is removed from the mold in the cooling demolding posture.

Therefore, in the present invention, since the cooling posture and the demolding posture of the mold are the same, the process of changing the posture between cooling and demolding can be omitted, and the molding cycle can be shortened.

Also, in the cooling demolding posture, the molding concave part of the mold faces upward, so it is difficult for heat to accumulate in the molding concave part, and the outer surface of the mold that receives the injection of cooling water faces downward, so the cooling that adheres to the mold Good drainage of water. Further, since the cooling nozzle is located below the mold, the water dripping from the cooling nozzle does not drop onto the mold or the molded product after cooling.

Further, when the mold is in the cooling / demolding posture, the front edge seal cover and the rear edge seal cover cover the space between the mold front edge and the waterproof cover and the space between the mold rear edge and the heating furnace. For,
Cooling water is prevented from flowing around between these. If the size of the mold is changed, the positions of the leading edge seal cover and the trailing edge seal cover can be adjusted to close the gap, and both seal covers must be replaced with new ones. Absent.

Also, by placing the material box on the lift, the overall height of the device is reduced.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a molding apparatus having a cooling device according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a mold, which is formed by electroforming using nickel or copper as a material, and a flange 12 is formed around a molding concave portion 11 whose inner surface is a product molding surface 10 and is formed at the tip of the swing arm 2. It is rotatably supported via a mold (not shown).

The swing arm 2 is for swinging the mold 1 between the inside of the heating furnace 3 (inside furnace position M) and the outside of the heating furnace 3 (outside furnace position N). Is performed by expanding and contracting the air cylinder 20 connected to the lower end.

The mold 1 is rotated with respect to the swing arm 2 by the operation of the rotation drive unit 4 and is held in a predetermined posture. The rotation drive unit 4 includes a drive motor 40 and the mold 1. It has a structure in which a chain 41 is laid between and.

The heating furnace 3 is for heating the mold 1 at the position M in the furnace by radiant heat and circulating hot air to store heat in the mold 1. The heating furnace 3 is installed on a machine base 30, has an opening 31 opened and closed by a shutter on the front surface, and prevents sideways interference with the swing arm 2 when the mold 1 is housed. A notch 32 for forming is formed.

Further, below the outside position N of the mold 1, a material box 5 containing a thermoplastic resin material 50 therein is disposed, and the material box 5 is placed on a pantograph-shaped lift 51. Has been done.

Above the material box 5, a waterproof cover 6 is provided.
Is provided. In this waterproof cover 6, a leg frame 60 is formed so as to straddle the material box 5 in a state where the material box 5 is lowered by an elevating table 51, and a cover member 61 is provided over the entire upper surface of the leg frame 60. And a front edge seal cover 62 is provided at the front end.

Further, the waterproof cover 6 is retracted from a cover position which covers the material box 5 lowered from the upper side by the casters 63 provided at the lower end of the leg frame 60 from the upper side so as not to prevent the vertical movement of the vertical stage 51. The mold 1 is located below the heating furnace 3 at all times, and the mold 1 is in the cooling demolding position at the outside position N, that is, as shown by the solid line in FIG.
When the product molding surface 10 faces upward and the product take-out side end portion 13 is inclined downward, it moves between the die 1 and the material box 5 to cover the material box 5.

The front edge seal cover 62 covers the space between the mold 1 and the waterproof cover 6 in the cooling demolding posture.
As shown in the figure, while being pivotally attached to the upper end of the link 64,
Waterproof plate 62 with the sealing material 65 for the mold 1 attached to the upper end
and a flexible cover 62b provided between the waterproof plate 62a and the leg frame 60.

The lower end of the link 64 is pivotally attached to the leg frame 60, and adjusting bolts 66 and 67 are provided between the link 64 and the waterproof plate 62a and between the leg frame 60 and the link 64, respectively. The angle of the waterproof plate 62a is adjusted by 66 and 67, and the waterproof plate 62a is formed so as to be in close contact with the mold 1 via the sealing material 65.

As shown in FIG. 1, the heating furnace 3 is also provided with a trailing edge seal cover 68 that covers a space between the heating furnace 3 and the mold 1 in the cooling demolding posture. Similar to the edge seal cover 62, it has a waterproof plate 68a and a flexible cover 68b.

In addition, a material supply nozzle 52 is provided on the inner surface of the cover member 61 of the waterproof cover 6, and when the waterproof cover 6 moves above the material box 5, the material supply device 53 via the hose 54 The resin material 50 is supplied from the material supply nozzle 52 into the material box 5. In this case, a plurality of material supply nozzles 5 are provided to handle multicolor materials.

In addition, a plurality of cooling nozzles 7 are provided on the upper surface of the waterproof cover 6, and the cooling nozzles 7 are in the cooling demolding posture when the waterproof cover 6 moves above the material box 5. Injecting cooling water from below to the outside of the
Cool the mold 1. A fixed cooling nozzle 70 is also provided on the front surface of the heating furnace 3.

Next, the forming process of the skin material using the forming apparatus of this embodiment will be described with reference to FIG.

First, the oscillating arm 2 oscillates the mold 1 to the position M in the furnace, and the rotary drive unit 4 heats the mold 1 while rotating the mold 1 to accumulate heat in the mold 1 [FIG. )].

After the heat is stored in the mold 1 as described above, the swing arm 2 swings the mold 1 to the outside position N of the furnace. While rotating in a downward posture, the material box 5 is raised by the elevating table 51, the mold 1 and the material box 5 are superposed, and clamped in the state of FIG. 3B, and then, FIG. As shown in (c), this is reversed and the resin material 50 is attached to the product molding surface 10 of the mold 1 and melted by heat storage of the mold 1 to mold the skin material 8.

After molding, as shown in FIG. 3D, the resin box 50 is reversed to recover the unmelted resin material 50 in the material box 5, and then the material box 5 is removed to remove the material box 5. It is lowered by the lift 51.

Next, as shown in the solid line in FIG. 1 and FIG. 3 (e), the mold 1 is rotated to the cooling / demolding posture, and the waterproof cover 6 is moved between the mold 1 and the material box 5. In this state, cooling water is jetted from the cooling nozzles 7, 70 to cool the mold 1 and the skin material 8. In this case, the cooling nozzles 7 and 70 are switched so as to alternately inject the cooling water and the air, thereby preventing the uneven cooling when only the cooling water is used and uniformly cooling the mold 1. Further, at the time of this cooling, the resin material 50 is replenished from the material supply nozzle 52 into the material box 5.

After cooling the mold 1 as described above,
As shown in FIG. 3 (f), the skin material 8, which is a molded product, is removed from the mold 1 while the mold 1 is kept in the cooling demolding posture, whereby the molding process of one cycle is completed. To do.

As described above, in the present embodiment, in the cooling and demolding process, the mold 1 is held in the cooling demolding posture in which the product molding surface 11 is upward and the product take-out side end portion 13 is inclined downward. It

Therefore, the mold 1 has the same posture during cooling and the posture during demolding, and it is not necessary to change the posture during cooling and during demolding, and the molding cycle can be shortened accordingly. .

Further, in the cooling demolding posture, since the molding concave portion 11 of the mold 1 faces upward, heat is not accumulated in the molding concave portion 11,
The effect of good cooling is obtained.

Further, since the outer surface of the mold 1 that receives the injection of the cooling water faces downward, the drainage of the cooling water is good, and further, since the cooling nozzle 7 is located below the mold 1, the injection of the cooling water is performed. After stopping, the dripping water from the cooling nozzle 7 does not drop onto the product molding surface 10 of the mold 1 or the skin material 8, and the product quality can be kept good.

Furthermore, since the waterproof cover 6 moves between the mold 1 and the material box 5 during cooling, it is possible to prevent the inflow of water into the material box 5, and to prevent the leading edge seal cover 62 and the trailing edge seal cover 68. Is provided, it is possible to obtain an effect that the cooling water can be prevented from flowing around to the product molded product 10 side of the mold 1.

In addition, since the resin material 50 can be supplied to the material box 5 at the same time as cooling, there is an effect that the time of the molding cycle can be shortened.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment. For example, in the embodiment, the skin material molded by the molding apparatus is an automobile. In addition to the band for the instrument panel,
As long as it is a skin material formed of a resin, it may be used for automobiles and other materials.

(Effect of the Invention) As described above, in the cooling device of the present invention, the cooling property and the water drainage property at the time of cooling are good, and there is no water dripping from the cooling nozzle, and effective and efficient cooling is achieved. You can

Further, since the postures at the time of cooling and at the time of demolding are the same, there is no need to change the posture between these steps, and the effect that the molding cycle can be shortened can be obtained.

Further, when the mold is in the cooling / demolding posture, the front edge seal cover and the rear edge seal cover cover the space between the mold front edge and the waterproof cover and the space between the mold rear edge and the heating furnace. For,
It is possible to obtain the effect that the cooling water is prevented from flowing around between these. Further, when the size of the mold is changed, it can be dealt with by adjusting the positions of the front edge seal cover and the rear edge seal cover, and it is possible to obtain an effect that it is not necessary to replace both seal covers with new ones. .

Moreover, by placing the material box on the elevating table, it is possible to obtain an effect that the total height of the apparatus is reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a molding apparatus having a cooling device according to an embodiment of the present invention, FIG. 2 is a side view showing a front edge seal cover provided in the molding apparatus, and FIG. 3 is a side view showing the molding apparatus. It is explanatory drawing which shows the forming process of the existing skin material. DESCRIPTION OF SYMBOLS 1 ... Mold 2 ... Oscillating arm 3 ... Heating furnace 4 ... Rotation drive part 7 ... Cooling nozzle 10 ... Product forming surface M ... Position inside furnace N ... Position outside furnace

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location // B29L 31:58 4F

Claims (1)

[Scope of utility model registration request] 1. A mold having a product molding surface formed thereon, and a swing arm for rotatably supporting the mold and swinging the mold between an in-furnace position and an out-furnace position of a heating furnace. And a cooling demolding method in which the mold is rotated with respect to the swing arm, and when the mold is located outside the furnace, the product molding surface is directed upward and the product take-out side end is inclined downward. A rotation drive unit capable of holding the mold in a posture, an elevating table provided below the outer position of the mold outside the furnace, on which a material box is placed, and a material box in a state of being lowered by the elevating table is covered from above. A waterproof cover provided so as to be movable within the retracted position within the retracted position so as not to interfere with the lifting of the elevator from the cover position, and the outer surface of the mold provided on the upper surface of the waterproof cover and in the cooling demolding posture. A cooling nozzle for spraying cooling water from below to above, and the waterproof cover. A front edge seal cover that is provided at the front end of the heating furnace, and that has a position adjustable front edge seal cover that covers between the front edge of the mold in the cooling demolding posture and the front end of the prevention cover; A mold cooling device for slush molding, comprising: a rear edge seal cover whose position is adjustable to cover a rear edge of the mold in a demolding position and a front surface of the heating furnace.