JPH0721310U - Foam molding equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a foam molding apparatus having a relatively simple and inexpensive structure and capable of preventing forgetting to set the sheet-like material in a molding die. [Structure] The sheet-like material 15 is formed on the mold surface 16 of the foaming mold 10.
In a device for injecting the foamed resin material 25 into the upper surface of the sheet-like material from the injecting device 20 and foam-molding the sheet-like material.
Is provided with an optical sensor 36 that senses the reflected light R of the light reflector 30, and the injection device is injected into the mold of the injection device by the reflected light signal. To control.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a foam molding device.

[0002]

[Prior art]

 Foam molded articles used for automobile interior parts such as instrument panels and door trims are generally composed of a skin-like sheet material covering the surface of the molded article, a cushioning foam, and a core material. In such a foam-molded product, a sheet material is set on the mold surface of the lower mold, and a core material is set on the mold surface of the upper mold as needed, and then a foamed resin such as urethane foam is formed on the upper surface of the sheet material. It is obtained by introducing a material, closing the mold, and performing foam molding integrally with the sheet-like material and the core material.

However, in the production of the above-mentioned molded product, continuous molding is usually carried out by a turntable or the like, but conventionally, set confirmation for the lower mold of the sheet-shaped product has not been carried out. Therefore, even if the sheet-like material is not set in the lower mold for some reason, the robot may inject the foamed resin material. By the way, the lower mold of the foaming mold on which the sheet-like material is placed may be provided with a large number of vacuum suction holes for adsorbing the sheet-like material to the mold surface and fixing the position. Therefore, if the foamed resin material is injected without arranging the sheet-like material, this vacuum suction hole may be blocked, which may cause an unexpected trouble that molding cannot be performed thereafter. In addition, the work of removing the foamed resin material that has been accidentally injected and adhered to the mold surface is very time-consuming.

[0004]

[Problems to be solved by the device]

 Therefore, the present invention was proposed in order to solve such a problem and has a relatively simple and inexpensive structure, and confirms that the sheet-shaped article is set in the forming die, and thus it is unexpected. The purpose of the present invention is to provide a foam molding device capable of preventing such a situation.

[0005]

[Means for Solving the Problems]

 That is, the present invention is an apparatus for setting a sheet-shaped object on the mold surface of a foam molding die and injecting a foaming resin material into the upper surface of the sheet-shaped material from a pouring device to perform foam molding, wherein the sheet material of the foam molding die is A light reflecting part for reflecting the light of the light emitting part is provided below the set position, and an optical sensor for sensing the reflected light of the light reflecting part is provided in the injection device, and the injection device type is provided by the reflected light signal. The present invention relates to a foam molding device characterized in that the injection into the inside is controlled.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view showing an example of a foam molding apparatus of the present invention, and FIG. 2 is a view of a foam molding die used in the apparatus of the present invention as seen from the mold surface.

As shown in FIG. 1, the foam molding apparatus 10 is placed on a turntable (not shown) or the like and continuously moves. The foam molding apparatus 11 and the injection apparatus 20 for the foam resin material are provided. Become. The foam molding die 11 is composed of a lower die 12 and an upper die 13, and is configured to be opened and closed by a hinge 14. Reference numeral 19 is a molded product cavity. As shown in the figure, a sheet-like material 15 serving as a skin of a molded product is set on the mold surface 16 of the lower mold 12. The mold surface 16 is provided with an appropriate number of vacuum suction holes 17 for sucking and positioning the sheet-like material 15 on the mold surface 16.

The sheet-like material 15 constitutes a skin covering the surface of a foam-molded article such as a soft vinyl chloride sheet, natural leather, or cloth. The sheet-like material 15 is formed into a predetermined skin shape by a known forming method such as vacuum forming or slush forming.

A core material 18 is set on the upper mold 13. A mold release agent is applied to the mold surface of the upper mold 13, if necessary.

The injecting device 20 is for injecting the foamed resin material 25 from the upper surface of the sheet-shaped material 15 set on the mold surface 16. In this example, the injecting device 20 is provided at the tip of the robot arm 26 and is placed on the turntable. Is moved forward and backward with respect to the foam molding die 11 which has been moved to a predetermined pouring position. Reference numeral 21 is an injection nozzle.

A light reflecting section 30 for reflecting the light of the light emitting section is provided below the set position of the sheet-like material 15 in the lower mold 12 of the foaming mold 11. The light reflection portion 30 may be any member as long as it reflects incident light, and a metal reflection plate having a mirror surface, a reflection tape made of synthetic resin, and the like are preferable materials because they are inexpensive and easy to replace. In fact, the mold surface of the lower mold 12 is easily soiled when the sheet-like material 15 is set, and the reflection effect of the light reflecting portion 30 is easily reduced.

In this embodiment, as can be understood from FIG. 2, the light reflecting portion 30 is provided on the outer peripheral mold surface 16a of the molded product cavity 19 portion of the lower mold 11. The outer peripheral mold surface 16a is a portion where the flange portion is arranged when the sheet-like material 15 is set.

The injection device 20 is provided with an optical sensor 36 that senses the reflected light R from the light reflector 30. In the embodiment, a known photoelectric tube device 35 in which a light emitting part 37 and an optical sensor 36 are combined is used. Then, laser light L is emitted from the light emitting portion 37 of the photoelectric tube device 35 toward the reflecting portion 30 of the lower mold surface 16 of the foam molding die 11. Then, the reflected light R that hits and is reflected by the light reflecting portion 30 enters the optical sensor 36 of the photoelectric tube device 35.

The optical sensor 36 is connected to a control device 27 that confirms the presence or absence of the reflected light R and controls the on / off of the injection of the injection device 20. If the optical sensor 36 confirms the reflected light R from the light reflecting section 30 during the operation of the injection device 20, it is confirmed that the sheet-like material 15 is not set on the lower mold 12. For that reason, the control device 27 is controlled to issue an operation stop (NG) signal to the injection device 20 to retract the robot arm 26 or sound an alarm.

On the other hand, if the optical sensor 36 does not confirm the reflected light R from the light reflecting section 30, it is confirmed that the sheet-like material 15 is set on the lower mold 12 to block the reflected light. This means that the control device 27 issues an operation (OK) signal to the injection device 20 and the injection of the foamed resin material is started.

In this embodiment, an example in which the light emitting unit is provided in the injection device as a phototube device is shown, but a separate light emitting device may be provided, or a device other than the injection device may be installed. As long as the light reflecting portion 30 provided in the molding die reflects a sufficient amount of reflected light and the optical sensor 36 senses it, for example, a working light installed at the injection position may be used.

[0017]

[Effect of device]

 As shown and described above, according to the foam molding apparatus of the present invention, the operation of the injection device is reliably controlled depending on the presence or absence of the sheet-like object, so that the forgetting to set the sheet-like object on the mold surface. It can be prevented. Further, since this device has an extremely simple structure, it is simple and inexpensive, and can be used in an automatic molding line using a robot without any problem.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a foam molding apparatus of the present invention.

FIG. 2 is a view of a foaming mold used in the device of the present invention as seen from the mold surface.

[Explanation of reference numerals] 10 foam molding device 11 foam molding die 12 lower mold 13 upper mold 15 sheet material 16 mold surface 20 injection device 21 injection nozzle 27 control device 25 foam resin material 30 light reflection part 35 photoelectric tube device 36 optical sensor 37 Light Emitting Part R Reflected Light

Claims (1)

[Scope of utility model registration request] 1. An apparatus for setting a sheet-shaped article on a mold surface of a foam molding die and injecting a foaming resin material into an upper surface of the sheet-shaped article from an injection device to perform foam molding, wherein the sheet-shaped article set of the foam molding die. A light reflecting part for reflecting the light of the light emitting part is provided at the lower part of the position, and an optical sensor for detecting the reflected light of the light reflecting part is provided in the injection device, and the light is introduced into the mold of the injection device by the reflected light signal. The foam molding apparatus is characterized in that the injection is controlled.