JPH0453656B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field The present invention provides a method for easily fixing the resin when cutting the foamed resin with a milling machine or the like when manufacturing a mold for manufacturing a mold using a foamed resin. This article relates to a method that can be used and a jig for fixing the same.

(b) Background technology Traditionally, molds for mold manufacturing are often made of wood or metal, and when cutting them with a milling machine etc., bolts and various jigs are used to fix them to the processing table. Sometimes, this mold is made of inexpensive foamed resin and used as a mold by applying a hardening agent to its outer surface.

However, in this case, since the foamed resin is extremely lightweight and easily damaged, there is no suitable means for fixing it to the table, and even if you try to cut it mechanically with a milling machine, the resin mold will move or float, making it difficult to accurately cut the mold. The reality was that carving was done by hand because it was difficult to obtain.

(C) Disclosure of the Invention The present invention proposes a method for easily and securely fixing the above-mentioned foamed resin mold to a processing table when cutting it using a milling machine, etc., thereby making it possible to easily and reliably fix the foamed resin mold to a processing table. It was made easy.

That is, in manufacturing a foamed resin mold for mold manufacturing by mechanical cutting with a milling machine or the like, the present invention
The foamed resin to be processed is placed on a processing table with a large number of permanent magnets arranged on the top surface and a large number of air suction ports arranged open, and the upper surface of the processing table other than the part on which the resin is placed is covered with a film or sheet. The bottom surface of the foamed resin is sucked through the suction port by a suction machine to attract the resin onto the processing table, and magnetic metal blocks are closely attached to the front and back and/or left and right sides of the resin, and the blocks are covered with the foamed resin. This method is characterized in that the resin is fixed by being attracted to the permanent magnet on the upper surface of the processing table through a film.

Hereinafter, embodiments of the method of the present invention will be explained with reference to the drawings.

(D) Example 1 shows a metal processing table equipped with a fixing means according to the present invention, and the upper surface of the processing table 1 is uniformly equipped with a large number of cooperating permanent magnets (for example, donut-shaped ferrite magnets). 2 are embedded and arranged, and a large number of atmospheric suction ports 3 are arranged in alternation with the magnets 2, and a lid piece 4 having a plurality of slits is fitted into each suction port 3. , these lid pieces 4
In addition, the upper surface of the magnet 2 is buried so as to be flush with the upper surface of the processing table 1, so that the upper surface of the processing table 1 becomes a flat surface.

Reference numeral 5 denotes a communication pipe installed inside the processing table 1. The pipe 5 communicates with each suction port 4 and is connected to an intake pipe 6 provided on the side of the processing table 1, and is connected to an external suction machine 7.
Atmospheric air is sucked through each suction port 4 on the upper surface of the processing table 1.

In order to cut a foamed resin 8 such as styrene foam, which is a workpiece that will become a mold for mold production, using a milling machine or the like, first, the processing table 1 is fixed, and then the resin 8 is cut as shown in FIG. 3A. The upper surface of the processing table 1 other than the part A on which the workpiece is placed is covered with a thin film or sheet such as a vinyl film to close the suction port 3 so that air can be sucked only from the part A. Note that the size of the portion A is preferably slightly smaller than the bottom surface of the resin 8.

Therefore, when the foamed resin 8 of the workpiece is placed on the part A and the suction machine 7 is operated, the resin 8
The bottom surface is strongly attracted to the processing table 1 by the suction from each suction port 3 in the A section, thereby suppressing the floating of the resin 8 (FIG. 3B).

However, since there is still a risk that this resin 8 may shift laterally, a magnetic metal such as iron of an appropriate size (i.e., a size that does not interfere with cutting) is further placed on the front and back and/or left and right sides of the resin 8. When the block 10 is brought into close contact with the block 10, the block 10 is strongly attracted to the upper surface of the processing table 1 through the film 9 by the magnet 2 on the lower side, and as a result, the resin 8 is completely prevented from shifting in the lateral direction. Yes (Figure 3 C).

Therefore, since the resin 8 is firmly fixed on the processing table 1 in this way, there is no fear that the resin 8 will move or float even when mechanical cutting is performed using a milling machine or the like, and the resin 8 can be cut quickly and accurately. It is possible to produce a foamed resin mold with a desired shape.

(E) Effects of the Invention The present invention is as described above, and conventionally it was impossible to mechanically process foamed resin, but according to the present invention, foamed resin made of a flexible material such as konnyaku can be fixed by suction. Then, general machining and NC processing can be performed. This means that, for example, when using foamed resin as a casting model, the cost is about 1/2 to 1/5 of that of conventional wooden molds, resulting in significant cost reductions and production costs for the entire casting product. It can contribute to improving sexual performance, and its economic effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the fixing device used in the method of the present invention, FIG. 2 is a partially sectional perspective view of the same, and FIGS. Code explanation, 1... Processing table, 2... Permanent magnet, 3
... Suction port, 4 ... Lid piece, 5 ... Communication pipe, 6
... Intake pipe, 7 ... Suction machine, 8 ... Foamed resin, 9
...Film or sheet, 10...Metal block.

Claims (1)

[Scope of Claims] 1. When manufacturing a foamed resin mold for manufacturing molds by mechanical cutting using a milling machine or the like, the mold is placed on a processing table with a large number of permanent magnets arranged on the top surface and a large number of air suction ports arranged open. Place the foamed resin of the workpiece, cover the top surface of the processing table other than the part on which the resin is placed with a film or sheet, and use a suction machine to suck the bottom surface of the foamed resin from the suction port to transfer the resin onto the processing table. At the same time, the resin is fixed by attaching magnetic metal blocks to the front and back and/or left and right sides of the resin and adhering the blocks to the permanent magnets on the upper surface of the processing table through the film. A method for fixing foamed resin for molds. 2 A large number of permanent magnets are embedded and arranged on the top surface of the processing table, and a number of atmospheric suction ports are opened, and a communication pipe is installed inside the processing table to communicate with each of the suction ports, and the communication pipe is connected to the side surface of the processing table. A fixing device for foamed resin for molds, characterized in that the device is connected to a suction machine via a provided suction pipe. 3. A cover piece having a plurality of slits is fitted to each of the air suction ports, and the upper surface of these cover pieces and each of the permanent magnets are flush with the upper surface of the processing table. A fixing device according to scope 2.