JP2619695B2 - Slash molding equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a slush molding apparatus for molding a layered thin resin product using a powdery resin material.

(Prior Art) A slush molding method is described in, for example, Japanese Patent Application Laid-Open No. 61-100422. In a conventional slush molding apparatus for performing this molding, an endless chain conveyor that carries a slash molding die in a suspended state travels substantially along a horizontal plane, and a part of the endless chain conveyor is heated (a chevron furnace). ) To heat the slash mold. For this reason, the conventional slush forming apparatus requires a large floor area for running the endless chain conveyor. In particular, there has been a problem that the entire apparatus becomes large due to the fact that the angle furnace needs to be long and large in order to increase the heat storage efficiency.

Further, in the conventional slush molding apparatus, since the slush molding die is fixed to the endless chain conveyor by bolts, when the slush molding die is removed from the endless chain conveyor and transferred to the powdering device, and the molding operation has been completed. When returning the slush molding die to the endless chain conveyor again, it is necessary to manually attach and detach bolts, which causes a reduction in production efficiency.

Furthermore, in the conventional slush molding apparatus, since the operation of sequentially transferring the slush molding die to the powdering device, the reheating device, and the cooling device is performed manually, the result is that the molding operation efficiency is reduced and the molding cost is increased. Had become.

(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned conventional problems, and its object is to make the whole compact and to automate almost all of the molding operation. It is an object of the present invention to provide a slush molding device capable of improving work efficiency and reducing molding cost.

(Means for Solving the Problems) A slash forming apparatus of the present invention is an endless chain conveyor that is stretched over sprockets at both ends installed at substantially the same height so as to convey a slash forming die along a substantially vertical plane. And a hot blast stove installed almost directly above the endless chain conveyor so as to pass through the upper traveling portion of the endless chain conveyor, and detachably carry the slush molding die and pass the slush mold into the hot blast stove. A plurality of mold-carrying arms planted at a plurality of locations of the endless chain conveyor, and an appropriate number of powdering devices disposed almost directly below the endless chain conveyor for adhering a powder resin material to the slash molding die. And a heating device for reheating the slush mold to which the powder resin material has been adhered in the powdering device; After being heated until completely melted, the slush mold to which the molten resin material is attached is cooled, and the molten resin material is heated by being passed through the hot blast stove and a cooling device for forming a molded product. After receiving the slush mold from the mold carrier arm, sequentially transferred to the powdering device, the heating device and the cooling device, and then, after the molded product is removed from the slush mold, the slush mold is removed. And a robot arm for transferring to the desired carrying arm again.

(Operation) A slash forming die is automatically attached to the mold carrying arm on the endless chain conveyor by a robot arm, and the endless chain conveyor passes through a hot blast stove to heat these slush forming dies to a required temperature. I do.
The slush forming mold that has passed through the hot blast stove is removed from the mold carrying arm by the robot arm and transferred to at least one powdering device. The powdery resin material is adhered in the powdering device, and as a result, the slush mold having a temperature that is insufficient is transferred to a heating device by the robot arm, where it is sufficiently reheated and adhered thereon. Completely melt the powdered resin material. Next, the slush mold is transferred to a cooling device by the robot arm, where the molten resin material is cured to become a complete molded product. This molded product is removed from the slush mold by an appropriate means. The slush mold from which the molded product has been removed in this way is attached again to the mold carrying arm on the endless chain conveyor by the robot arm, and the same operation is repeated thereafter.

(Example) Hereinafter, an example is described with reference to drawings.

1 and 2, a slash forming apparatus according to the present invention is provided with a slash forming die 1 along a substantially vertical plane.
A pair of parallel endless chain conveyors 2,2 for conveying
Is provided. The endless chain conveyor 2 is stretched between sprockets 3 at both ends, which are installed at substantially the same height. Therefore, the straight upper and lower traveling portions of the endless chain conveyor 2 travel in a substantially horizontal direction. Almost right above the endless chain conveyor 2, there is provided a hot blast stove 4 through which the upper traveling portion of the endless chain conveyor 2 passes. As the hot blast stove 4, a drying hot blast stove (flat furnace) according to the applicant's earlier patent application No. 230016 in 1985 is particularly preferred.
However, it is most advantageous because it is compact and does not decrease the heat storage efficiency.

At a plurality of locations on the endless chain conveyor 2, a plurality of mold carrying arms 5 are provided for carrying the slash forming mold 1 and passing it into the hot blast stove 4. The structure of the mold carrying arm 5 will be described in detail. As shown in FIG. 3, a bracket 7 having one end fixed to a side plate 6 of each endless chain conveyor 2 and a bracket 7 opposed to each other are shown. A support shaft 8 is fixed to the other end of the support shaft 7 and is provided between the two brackets 7. A hook 9 is mounted near the both ends of the support shaft 8 so as to be freely rotatable at its upper part. The ends of the gripping shafts 11 protruding from both sides of the slash molding die 1 are respectively placed in the hooking concave portions 10 below the hooks 9. When the slash forming die 1 is transported by such a die supporting arm 5 , the endless chain conveyor 2
Although the direction of the bracket 7 changes in the upper and lower traveling portions of the hook, since the hook 9 is rotatable around the support shaft 8, the hooking concave portion 10 of the hook 9 is always located on the lower side, and the slush molding is performed. The mold 1 can be transported without dropping.

Next, for example, two powdering devices 12 and 13 are installed almost directly below the endless chain conveyor 2. Second
The second powdering device 13 is provided to form the molded product into a two-layer structure, but may be omitted, and furthermore, a large number of powdering devices 13 may be used to form the molded product into a structure having three or more layers. (Not shown) in some cases.

The powdering devices 12 and 13 have a known structure,
This will be described in brief. As shown in FIGS. 2 and 4, a reservoir tank 14 for accommodating a powder of a resin material and the reservoir tank 14 are rotatable about a horizontal axis. And a supporting base 15. A frame-shaped lid 17 that is opened and closed by a desired number of fluid cylinders 16 is provided at an upper opening of the reservoir tank 14. Frame lid 17
Has a shape corresponding to the outer shape of the opening of the reservoir tank 14 and the outer shape of the base end of the slash molding die 1,
After the slush mold 1 is fitted into the opening of the reservoir tank 14 in a predetermined position, the periphery of the base end of the slush mold 1 is fastened and fixed to the opening of the reservoir tank 14, thereby opening the reservoir tank 14. It serves to seal the part. The slash mold 1 is on the base 15
For reversing the reservoir tank 14 that houses and fixes the
A driving device 18 is provided with a driving shaft 19 forming the horizontal rotation axis. When the reservoir tank 14 is inverted, the powder therein moves and the slush mold 1
Stick on top. Thereafter, the reservoir tank 14 is returned to its original position, and the excess powder drops from the slush molding die 1. Thereafter, the frame mold lid 17 is loosened, and the slush molding die 1 is taken out and transported in the next step.

At a position next to the powdering device 13 at the last stage, a heating device 20 for reheating the slush molding die 1 having insufficient temperature due to adhesion of powder is installed. At a position next to the heating device 20, a cooling device 21 is provided for curing the resin material on the slush mold 1 which has been sufficiently heated and completely melted in the heating device 20 to form a molded product. I have. In some cases, a demolding device 22 for removing a molded product from the slush molding die 1 is provided at a position next to the cooling device 21. This demolding operation can be performed manually.

Further, according to the present invention, below the endless chain conveyor 2, a desired number of robot arm mechanisms 23 for transferring the slush mold 1 to various devices are provided. The robot arm mechanism 23 receives the slush mold 1 heated through the hot blast stove 4 from the mold carrier arm 5 and sequentially transfers it to the powdering devices 12 and 13, the heating device 20, the cooling device 21 and the demolding device 22. Play a role. Robot arm mechanism
23 has a known structure which is automatically controlled by a computer. To briefly explain the configuration, each robot arm mechanism 23 is composed of a gripping shaft provided on the slash forming die 1.
11 is provided with a pair of arms 25 having a mounting recess 24 for mounting and supporting both ends of the arm 11. The arm 25 is supported by the guide frame 26 and can move up and down along the guide frame 26. Further, the guide frame 26 can move substantially along the traveling direction of the endless chain conveyor 2, and the slash forming mold 1 carried by the arm 25 is separated from the powdering devices 12, 13, the heating device 20, the cooling device 21, and the demolding device. It can be transferred to the device 22.

The operation of the slush forming apparatus configured as described above will be described. First, the slash forming die 1 that has not been used or the molded product has been removed is transferred to an appropriate die supporting arm 5 on the endless chain conveyor 2 by the robot arm mechanism 23 . Hanged.
As a result, the slush mold 1 is passed from the inlet 4a side of the hot blast stove 4 into the slush mold 1, and is sufficiently heated during that time. When the slush mold 1 exits from the outlet 4b side of the hot blast stove 4,
The robot arm mechanism 23 receives the slush mold 1 and transfers it to the first-stage powdering device 12. After the powder has been applied to the slush molding tool 1 in the powdering device 12, it is sent again from the robot arm mechanism 23 to the next powdering device 13, where the same powder applying operation is performed. Next, the slash mold 1 is again transferred to the heating device 20, the cooling device 21, the demolding device 22 and the like by the robot arm mechanism 23 again. The slush mold 1 from which the finished product (molded product) has been removed is transferred to the mold carrying arm 5 by the robot arm mechanism 23 again. Hereinafter, the same operation is repeated. The number of slush molds 1 is appropriately selected.

(Effects of the Invention) As described above, according to the present invention, the endless chain conveyor and the hot blast stove are arranged in a vertical relationship. There is an advantage that the area can be significantly reduced. Further, as a result, it is possible to use a short and small hot blast stove having a high heat storage efficiency and a high heat storage efficiency, and it is possible to further reduce the size. Furthermore, the work of circulating the slash forming mold sequentially from the mold carrying arm on the endless chain conveyor to the powdering device, heating device, cooling device, etc. is performed by a robot arm mechanism that can be automatically controlled by a computer, so work efficiency is improved. It is possible to obtain a slush molding device that can reduce molding costs.

[Brief description of the drawings]

FIG. 1 is a schematic partial sectional elevation view of a slush forming apparatus according to an embodiment of the present invention, FIG. 2 is a schematic side view of FIG. 1, and FIG. 3 is an endless chain in FIG. FIG. 4 is a perspective view showing a main part of the conveyor, and FIG. 4 is a schematic enlarged explanatory view of the powdering device in FIG. 1 ... slash mold, 2 ... endless chain conveyor,
3 ... Sprocket, 4 ... Hot stove, 4a ... Inlet, 4b ...
… Outlet, 5 …… Type carrying arm, 6 …… Side plate,
7 ... Bracket, 8 ... Spindle, 9 ... Hook, 10 ...
Hook recess, 11 ... gripping shaft, 12, 13 ... powdering device, 14 ... reservoir tank, 15 ... stand, 16 ... liquid cylinder, 17 ... frame type lid, 18 ... driving device, 19 ... … Drive shaft, 20… Heating device, 21… Cooling device, 22 …… Detachment device, 23 … Robot arm mechanism, 24 …… Recessed recess, 25…
... arms, 26 ... guide frame.

Claims (1)

(57) [Claims] 1. An endless chain conveyor spanned by sprockets at both ends installed at substantially the same height so as to convey a slash mold along a substantially vertical plane, and an upper traveling portion of the endless chain conveyor. So that
A hot blast stove installed almost directly above the endless chain conveyor, and a plurality of plants planted at a plurality of locations of the endless chain conveyor for detachably supporting the slash forming die and passing it through the hot blast stove. A mold carrying arm, an appropriate number of powdering devices disposed almost directly below the endless chain conveyor, and a powder resin material for adhering the powder resin material to the slash molding die, and the powder resin material adhered in the powdering device. A heating device for reheating the slush mold; heating the powder resin material by the heating device until the powdered resin material is completely melted; and cooling the slush mold to which the molten resin material is attached to form a molten resin. A cooling device for converting a material into a molded product, and receiving the slush molding die heated through the hot blast stove from the die supporting arm, sequentially forming the powdering device, And a robot for transferring the slush mold to the desired mold carrier arm after the molded article is removed from the slush mold after being transferred to the heating device and the cooling device. Slash molding equipment.