JPH0732013Y2 - Mold release equipment for foam molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for releasing a molded foam product from a mold for foam molding.

(Prior Art) A foam molding product (hereinafter,
When releasing from the mold), blow the air between the mold and the molded product (air blow) to separate the molded product from the mold in order to prevent the foamed molded product from cracking or other damage. A device is used.

For example, as this mold releasing device, there is one proposed in Japanese Utility Model Laid-Open No. 187717/1982, which is inside a mold 3 composed of an upper mold 1 and a lower mold 2 as shown in FIG. When foam molding is performed with, and the mold P is opened after molding to release the molded product P from the lower mold 2, air is blown along the outer periphery of the foam molded product P from the air blow nozzle 4 arranged above the lower mold 2. The foamed molded product P is gradually separated from the lower mold 2 by blowing.

By the way, in the process of performing the air blow, the noise generated when the compressed air is jetted from the air blow nozzle, the noise generated when the jetted compressed air hits the molded article or the mold, etc. Since noise is generated and the working environment is deteriorated, conventionally, the noise is reduced by covering the entire mold during air blowing and cutting off the outside.

In addition, in order to improve productivity, many molds are connected, pulled and moved to inject molding material, cure, air blow,
In the foam molding line that performs molding continuously with release,
As shown in the figure, noise is reduced by covering the mold 3 with a box-shaped muffling chamber 5 in the air blowing step.

(Problems to be solved by the invention) However, in the muffling chamber 5 used in the foam molding line for continuously molding, the inlet 5a (shown in FIG. 6) for continuously passing the mold 3 is provided. And exit (not shown)
However, there is a problem in that noise leaks from here, and noise cannot be sufficiently reduced.

Therefore, in order to completely cover the mold 3 at the time of air blowing, doors may be provided at the entrance 5a and the exit of the muffling chamber 5 to open and close it. In this case, the mold 3 is carried into the muffling chamber 5. Then close the door, blow air, open the door and mold 3
Since the process of unloading the mold 3 is carried out, the transfer of the mold 3 becomes an intermittent feed, the operating rate is lowered, and the opening / closing control of the door must be performed, which complicates the structure. It was

The present invention has been made in view of the above problems, and an object of the present invention is to provide a mold releasing device capable of reducing noise in a foam molding line without reducing the operating rate.

(Means for Solving the Problems) A mold releasing apparatus for a foam-molded article according to the present invention is provided on a surface of a plate-shaped body that is in contact with the mold and that is disposed so as to face a dividing surface of the foam-molding mold. A sound deadening cover having an elastic body attached thereto, and an air blow nozzle which is provided in the sound deadening cover with an opening on the side of the dividing surface and blows air between the mold and the foamed molded product in the mold are housed. And a discharge device attached to the storage part for discharging air from the mold covered with the sound deadening cover.

(Operation) With the above configuration, by pressing the elastic body of the sound deadening cover against the divided surface of the mold, the inside of the mold can be sealed, and the mold is housed in that state. Noise can be reduced by injecting air from the air blow nozzle between the mold and the foam-molded product to separate them.

Then, in the foam molding line, it is possible to keep the inside of the mold in a hermetically closed state by sequentially pressing the mold that is continuously conveyed to the elastic body, and to blow air without intermittently conveying the mold. It can be performed continuously, and the release of the foamed molded product can be performed efficiently.

(Example) Next, the Example of this invention is described based on drawing.
1 is a vertical sectional view of the releasing apparatus, FIG. 2 is a vertical sectional view of the releasing apparatus, and FIG. 3 is a sectional view taken along the line III-III in FIG.

The die 6 is composed of an upper die (not shown) and a lower die 7, and an undercut portion 7a is formed in the lower die 7 so that the foamed molded product P remains on the lower die 7 side when the die is opened. The lower die 7 can be moved by a roller 8 provided on the lower surface, and a large number of dies 6 can be connected and conveyed by pulling. In the air blow process in the foam molding line,
The foam molding is already completed inside, and the mold 6 is conveyed with the upper mold opened. In addition, the mold 6 is set to the roller 8
Instead of pulling by using the mold, the mold 6 may be placed on a belt conveyor and conveyed.

A muffling cover 9 is arranged so as to face the dividing surface 7b of the lower mold 7 of the mold 6 that has been conveyed. The sound deadening cover 9 is attached to a plate-shaped body 11 such as an iron plate which is held by the frame 10 and is provided so as to face the division surface 7b, and the entire lower surface of the plate-shaped body 11.
The lower die 7 is composed of an elastic body 12 that comes into pressure contact with the dividing surface 7b, and a sound absorbing rubber 13 is attached to the lower surface of the elastic body 12.

In addition, in the sound deadening cover 9, a storage portion in which an air blow nozzle 14 for blowing air between the lower mold 7 and the foamed molded product P in order to release the foamed molded product P in the lower mold 7 is stored. It has 15 mo. The air blow nozzle 14 is provided so as to be movable only in a direction orthogonal to the conveyance direction of the mold 6, and moves according to the conveyance of the mold 6 to move air between the lower mold 7 and the foam molded product P. Can be blown in.

The storage part 15 has a sound deadening cover 9 from the air blow nozuno 14.
An exhaust device 16 for discharging the air blown into the lower mold 7 sealed by is attached. This exhaust device 16 connects the storage portion 15 and the outside with a tubular member 17.
An exhaust silencer 18 is provided at the tip of the exhaust silencer 18, and the exhaust silencer 18 has a structure in which a large number of plates 19 each having a slit formed therein are arranged in parallel. Exhaust silencer
Instead of 18, an exhaust pipe that connects the inside and the outside of the storage unit 15 may be extended to a position away from the operator.

An inclined surface 9a is formed on the die 6 loading side of the sound deadening cover 9 so that the die 6 can smoothly enter the lower surface side of the sound deadening cover 9. In addition, as shown in FIG. 4, the muffler cover 9 has an air blow nozzle 14 for supplying air to the lower mold 7.
While it is being blown into between the foamed molded product P and the foamed product P (while the mold 6 moves from the position A to the position B), the dividing surface of the lower mold 7 is surely
The conveying direction of the die 6 is set so as to be in pressure contact with the 7b, and as shown in FIG. 3, the dimension in the direction orthogonal to the conveying direction is also set to a dimension that allows the inside of the lower die 7 to be sealed. Has been done. The elastic body 12 on the lower surface of the plate-like body 11 has such an elasticity that when the lower die 7 enters the lower surface of the sound deadening cover 9, the elastic body 12 is easily compressed and deformed by the advancing force of the lower die 7 and comes into close contact with the dividing surface 7b. Those having are preferred. For example, soft foamed plastic can be used.

The operation of the release apparatus having the above structure will be described with reference to FIG.

The mold 6 conveyed with the mold opened is the muffler cover 9
When entering the lower side, the dividing surface 7b of the lower mold 7 moves while being in pressure contact with the elastic body 12 (states shown in FIGS. 5A and 5B). When the elastic body 12 is brought into pressure contact with the entire split surface 7b, the inside of the lower mold 7 is hermetically sealed, and when the lower mold 7 is moved to the position of the housing portion 15, air injection from the air blow nozzle 14 is started. Air is blown between the lower mold 7 and the foamed molded product P (state of FIG. 5 (c)). The air blow nozzle 14 moves in a direction orthogonal to the conveying direction of the mold 6 and blows air along the outer periphery of the foam molded product P. The foamed product P is gradually separated from the lower mold 7 by the blown air (state of FIG. 5 (d)). Further, the blown air is exhausted from the exhaust device 16 through the exhaust silencer 18 to the outside.

As described above, since the foam molding P is peeled off by blowing air from the air blow nozzle 14 in a state where the inside of the lower mold 7 is hermetically sealed, and the air is exhausted from the exhaust device 16 to the outside, noise generated is generated. Can be reduced. Furthermore, air blow can be performed continuously without the need to send the mold 6 intermittently.

In addition, when the release apparatus of this example was tested,
It was found that the noise that was above B was suppressed to below 80 dB.

(Effect of the Invention) As described in detail above, according to the present invention, the elastic body of the sound deadening cover is brought into pressure contact with the dividing surface of the mold where the foamed molded product is to be released from the mold, and the inside of the mold is hermetically sealed. By blowing air from the housed air blow nozzle between the mold and the foam molded product in the mold, noise can be reduced and the foam molded product can be released from the mold.

Then, in the foam molding line, air blow can be sequentially performed on the continuously conveyed molds, and noise can be reduced without lowering the operation rate.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a device for releasing a foam-molded product according to the present invention, FIG. 2 is a perspective view of the device for releasing shown in FIG. 1, and FIG. III-III sectional drawing of a figure, FIG. 4 is a schematic diagram for setting the dimension of the muffling cover shown in FIG. 1, FIG. 5 (a), (b), (c), (d) FIG. 6 is a view showing a state of air blowing by the mold releasing device shown in FIG. 1, FIG. 6 is a perspective view showing an example of a step of performing air blowing in a foam molding line, and FIG. 7 is a conventional mold releasing process. It is a longitudinal section showing an example of a device. 6 ... Mold (foam molding mold) 7 ... Lower mold 7b ... Dividing surface 9 ... Sound deadening cover 11 ... Plate body 12 ... Elastic body 14 ... Air blow nozzle 15 ... Storage part 16 ... Exhaust device P ... Foam molding product

Claims (1)

[Scope of utility model registration request] 1. A sound deadening cover, which is disposed so as to face a split surface of a foam molding die, and has an elastic body attached to a surface of a plate-like body which is in contact with the die, and the sound deadening cover. An accommodating portion which is opened on the side of the dividing surface and accommodates an air blow nozzle for blowing air between the mold and a foam molded article in the mold; and a sound deadening cover attached to the accommodating part. An apparatus for releasing a foam-molded product, comprising: an exhaust device that discharges air from the mold covered with.