JP3777568B2 - Vacuum forming apparatus and method of manufacturing molded part using this apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum forming apparatus for forming a part used as an automobile bumper and the like, and a method of manufacturing a formed part using the apparatus.
[0002]
[Prior art]
Conventionally, injection molding has been used as a molding method for molded parts such as automobile bumpers. In this injection molding, a concave mold 70 as shown in FIG. 7 is generally used as a mold for molding.
[0003]
In addition, when molding a bumper for an automobile using a plurality of convex molds 80 as shown in FIG. 8, after individually molding a plurality of parts 80A, 80B, 80C, a dedicated jig (not shown) is used. One part was manufactured by bonding and integration.
[0004]
[Problems to be solved by the invention]
However, the parts manufactured using the concave mold have the problems that an extra number of manufacturing steps are required to cover the poor workability, and it is difficult to maintain accuracy in terms of quality. .
[0005]
In addition, since the parts manufactured using the plurality of convex molds described above are bonded to individual parts to form one part, there is a variation in the bonding accuracy at the joint portion of each part. However, there is a problem that it is difficult to maintain a high level of accuracy in terms of quality, and that a process for correcting (repairing) the joint portion with a putty or the like is necessary.
[0006]
Accordingly, an object of the present invention is to provide a vacuum forming apparatus capable of forming a high-quality molded part and greatly reducing the number of parts manufacturing steps, and a method of manufacturing a molded part using this apparatus. There is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the vacuum forming apparatus of the present invention is placed on a support body provided with a first suction hole for vacuum-sucking a molding material at a position facing the first suction hole. A workpiece is arranged through a seal portion provided with a second suction hole, and the support has angle adjusting means for adjusting the angle according to the shape of the workpiece .
[0008]
The said structure WHEREIN: It is desirable to provide the said angle adjustment means in the both end part vicinity of the said support body. Further, it is desirable that the workpiece is divided and arranged.
[0009]
Further, in order to achieve the above object, the present invention provides a second on a support body provided with a first suction hole for vacuum-sucking a molding material at a position facing the first suction hole. Of a molded part using a vacuum forming apparatus in which a work is disposed through a seal portion provided with a suction hole and the support has angle adjusting means for adjusting an angle according to the shape of the work . This is a manufacturing method, a processing step for performing desired processing on a workpiece, an adsorption step for placing a molding material on the workpiece subjected to the desired processing by this processing step, and suctioning from below the support, and this suction A separation step of separating the molding material adsorbed on the workpiece in the process from the vacuum forming apparatus; and a removal step of removing the workpiece remaining in the molding material separated by the separation step. .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 6 show a vacuum forming apparatus according to the present invention and a method of manufacturing a molded part using the apparatus.
[0011]
FIG. 1 is a view showing a vacuum forming apparatus according to an embodiment of the present invention.
1A, a vacuum forming apparatus according to an embodiment of the present invention includes a support 1, a seal portion 2, and workpieces 3A, 3B, and 3C.
The support 1 is a metal base and is provided with suction holes 11 for sucking a molding material (such as a thermoplastic resin) by a vacuum pump (not shown). Further, angle adjustment mechanisms 12A and 12B for adjusting the angle in accordance with the shape (size) of the workpiece are provided in the vicinity of both ends of the support 1, and the angle can be arbitrarily set. As said angle adjustment mechanism 12A, 12B, the hinge mechanism which can change an angle in multiple steps is suitable, for example. In this example, the support 1 is divided into three parts, a center part and both end parts, and both ends are angled with respect to the center part so as to follow the shape of the molded part by connecting both ends with hinges and screwing. It is set to be possible.
[0012]
Similar to the support 1, the seal portion 2 is provided with an adsorption hole 21 for adsorbing a molding material by a vacuum pump (not shown) at a position facing the adsorption hole 11. The seal portion 2 is disposed between the support 1 and the workpieces 3A, 3B, and 3C, and when the molding material is adsorbed by the vacuum pump, the support and the workpiece are connected to each other so that no air leaks. Any material may be used as long as it is in close contact, and for example, natural rubber, synthetic rubber, latex rubber, silicon rubber, or the like is used.
[0013]
The workpieces 3A, 3B, and 3C are members that are molds of a molded product, and are configured by three workpieces in the present embodiment. However, the larger the curvature of the molded product, the better it is to divide into a plurality of pieces, and the smaller the curvature is. In some cases, it is not always necessary to divide into a plurality.
[0014]
The support 1, the seal part 2, and the workpieces 3 </ b> A, 3 </ b> B, 3 </ b> C are integrated as shown in FIG. 4 is mounted.
[0015]
Hereinafter, a component manufacturing method using this vacuum forming apparatus will be described with reference to FIGS.
First, in FIG. 2, the above-described vacuum forming apparatus is fixed to the NC milling bed 20 with a plurality of bolts 14 (four positions in FIG. 2), and the workpieces 3A, 3B, 3C provided in the vacuum forming apparatus are fixed. Then, a desired surface processing is performed by the NC milling machine 200 based on NC data (mold data) created in advance.
[0016]
Next, as shown in FIG. 3, the vacuum pump nozzle 4 is mounted from below the vacuum forming apparatus, and the heated molding material 5 is placed on the workpiece that has been subjected to desired processing by the NC milling cutter 200. Adsorption treatment with a vacuum pump is performed. The molding material 5 adsorbed by the vacuum pump is molded so as to coincide with the shape of the workpiece as shown in FIG.
[0017]
When the molding material 5 molded into a desired shape is cured by cooling treatment, the screws 13 that have fixed the support 1, the seal portion 2, and the workpieces 3B and 3C are removed, as shown in FIG. 4B. Then, the molding material (molded product) 5 is lifted upward and separated from the vacuum molding apparatus in a state where the work 3A is left.
[0018]
FIG. 5A shows a state in which the molding material (molded product in which the workpieces 3B and 3C remain) 5 and the vacuum molding apparatus are separated. Since the workpiece 3B and the workpiece 3C remain adsorbed on both ends of the molded product 5 separated in this way, they are removed as shown in FIG. 5B. After removing the workpieces 3B and 3C in this way, the molded product 5 (car bumper) as shown in FIG. 6 is completed by performing trimming (surface processing) of the molded product 5.
[0019]
In addition, although the manufacturing process of the bumper for automobiles was shown as an embodiment of the present invention, the present invention is not limited to this. For example, even a molded product made of a resin material such as a housing of a television or a personal computer may be used. Good.
[0020]
【The invention's effect】
As is clear from the above description, according to the vacuum forming apparatus of the present invention and the method of manufacturing a molded part using the apparatus, the vacuum forming apparatus in which the support and the work are integrated through the seal portion is used. Processes from mold production to molded product production can be performed. Accordingly, it is possible to reduce the number of steps for covering the finish as in the conventional case, and to provide a high-quality molded product.
[0021]
In addition, according to the present invention, since there is no need for steps such as gluing and putty correction using a dedicated jig for bonding a plurality of parts that are divided and formed as in the prior art, the number of manufacturing steps is greatly reduced. It is possible to reduce the manufacturing cost.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view and a sectional view showing a vacuum forming apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram showing a workpiece processing.
FIG. 3 is a diagram showing a molding material adsorption step.
FIG. 4 is a diagram showing a molding material separation step.
FIG. 5 is a diagram illustrating a process of removing a workpiece remaining on a molding material.
FIG. 6 is a perspective view showing a completed molded product.
FIG. 7 is a perspective view showing a conventional concave mold.
FIG. 8 is a perspective view showing a conventional convex mold.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support body 2 Sealing part 3A-3C Work 4 Vacuum pump nozzle 5 Molding material (molded product)
11 Adsorption hole 12A, 12B Angle adjustment mechanism 13 Screw 14 Bolt

Claims (4)

A workpiece is disposed on a support provided with a first suction hole for vacuum-sucking a molding material via a seal portion provided with a second suction hole at a position facing the first suction hole. Configured
The vacuum forming apparatus , wherein the support has angle adjusting means for adjusting an angle according to the shape of the workpiece . The angle adjusting means may be provided near both end portions of the support, vacuum forming apparatus according to claim 1. The workpiece is characterized in that it is arranged is divided into a plurality, vacuum forming apparatus according to claim 1 or 2 wherein. A workpiece is disposed on a support provided with a first suction hole for vacuum-sucking a molding material via a seal portion provided with a second suction hole at a position facing the first suction hole. And, the support is a method of manufacturing a molded part using a vacuum forming apparatus having an angle adjusting means for adjusting an angle according to the shape of the workpiece ,
A processing step of applying desired processing to the workpiece;
An adsorption step of placing the molding material on a workpiece that has been subjected to desired processing by the processing step, and adsorbing from below the support,
A separation step of separating the molding material adsorbed on the workpiece in the adsorption step from the vacuum forming apparatus;
A removal step of removing the workpiece remaining in the molding material separated by the separation step;
A method of manufacturing a molded part using a vacuum forming apparatus characterized by comprising:

Images