JPH0310411B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The method of the present invention is mainly applied to deep-drawn containers made of stainless steel, in which the upper part is narrower than the lower part, and the upper part has a different planar shape from the lower part. The present invention relates to a method of manufacturing modified deep-drawn ware.

(Prior art) When attempting to form modified deep-drawn objects, the general method is to place a primary processed product in the form of a straight-shaped drawn container in a female die, and to inject rubber and oil into the inside of the processed product. There are two methods: the so-called bulge forming method, in which a liquid such as water is pressurized and the internal pressure creates a female mold shape, and the press forming method, in which a straight-shaped primary processed product is press-fitted into a female mold (receiving mold) with a narrow lower part. Conceivable.

(Problems to be Solved by the Invention) As illustrated in FIG. 4, when a primary processed product made into a straight deep-drawn utensil is drawn into a deformed opening (square or other shape), the bulge processing method cannot be applied. That is, since the bulge processing method is only a bulging process, a drawing process is not possible. On the other hand, it is conceivable to form a primary processed product with a deformed opening and bulge the lower part of the container using a bulging method, but it is extremely difficult to manufacture the primary processed product.

Further, when a press working method is adopted in which a straight primary workpiece is press-fitted into a female mold (receiving mold) having a narrowed shape, that is, a narrow lower part, the workpiece adheres tightly to the female mold and does not separate from the mold.

(Means for Solving the Problems) Therefore, the present invention employs the above-mentioned press working method, and also allows the workpiece to be easily removed from the mold after the work is completed. That is, a receiving mold whose inner surface has a modified drawing shape is vertically divided, the outer peripheral surface is made into a tapered shape, a ring-shaped fastener is tightly fitted into the receiving mold, and the primary processed product of the deep-drawn utensil is drawn into a substantially straight shape in advance. After press-fitting into the receiving mold, the ring-shaped fastener is loosened to take out the workpiece from the receiving mold.

Therefore, even if the workpiece is press-fitted into the divided receiving mold, the receiving mold is prevented from moving in the outer circumferential direction by the ring-shaped fastener, so the workpiece is pressed into the receiving mold (female mold). ) shape, and after press-fitting into the mold, move the ring-shaped fastener to release the pressure on the mold, the mold will separate from the workpiece, and the workpiece can be easily removed from the mold. It can be taken out, and a deep-drawn container with a modified mouth can be easily manufactured.

(Example) Next, an example of the method of the present invention will be described based on the drawings.

Figure 1 is a perspective view of each member of the press receiving part, and
The figure is a sectional view of the press immediately before processing, FIG. 3 is a sectional view of the press after processing, and FIG. 4 shows the state of the workpiece before and after processing.

The press receiving part has a receiving cushion 2 protruding from the center of the base 1, and receiving molds (female molds) 3, 3' that are vertically divided into two are attached to the base 1 so as to surround the receiving cushion 2. The upper outer circumferential surfaces of the molds 3, 3' are tapered a, and when mounted on the base 1, one of the molds 3 is firmly fixed to the base 1, and the other mold 3' is mounted so that it can move somewhat. A disk shape is suitable for the ring-shaped fastener 4 due to its strength, and the inner surface d of the central hole b is a tapered surface that matches the tapered outer peripheral surface a of the receiving molds 3 and 3', and the mounting bolt holes d are appropriately formed. The press receiver is fitted from above the receiving molds 3 and 3' mounted on the base 1, and the connecting bolt 5 set on the base 1 is passed through the bolt hole d and the nut 6 is tightened. It forms part of the Further, a push-up cam 8 with a protruding handle 7 is pivotally supported and interposed between the base 1 and the ring-shaped fastener.

Then, the primary processed product A, which is in the shape of a straight deep-drawn container shown in FIG. 4A, is placed on the receiving cushion 2 as shown in FIG. When pushed into the mold, the primary processed product is processed into a modified deep-drawn ware B in which the receiving mold shape, that is, the mouth part is deformed and drawn, as shown in FIG. 4B. After that, loosen the nut 6, raise the handle 7, rotate the push-up cam 8, and push the ring-shaped fastener 4 upwards.
As the workpiece B is removed, the workpiece B is pushed up toward the receiving molds 3 and 3' by the receiving cushion 2, and is removed from the receiving cushion 2. Therefore, a modified deep-drawn device with a mouth portion drawn into a specific shape can be formed by press working.

Note that the shape of the ring-shaped fastener, the fixing means, and the push-up mechanism are not particularly specified in the above embodiments, and any necessary mechanism may be adopted as appropriate. Furthermore, the method of the present invention can also be applied to cases where the aperture shape of the aperture part is not the rectangular shape shown in the example, but any arbitrary shape.

(Effects of the Invention) As described above, the present invention makes it possible to further narrow the opening of the primary processed product of a straight deep-drawn container into a specific shape by press working, thereby easily manufacturing modified deep-drawn utensils with a specific shape. I was able to do that.

[Brief explanation of the drawing]

The figures show an embodiment of the method of the present invention, in which Fig. 1 is a perspective view of each member of the press receiver, Fig. 2 is a sectional view of the press immediately before processing, and Fig. 3 is a sectional view of the press after completion of processing. Figures 4A and 4B show the workpiece; A shows the workpiece before processing (primary processed product), and B shows the workpiece after processing. 1 is a base, 2 is a receiving cushion, 3 and 3' are receiving molds, 4 is a ring-shaped fastener, 5 is a connecting bolt, 6 is a nut, 7 is a handle, 8 is a push-up cam, and 9 is a press pressing body.

Claims (1)

[Claims] 1. Divide a receiving mold with an inner surface into a modified drawn shape, make the outer circumferential surface tapered, tightly fit a ring-shaped fastener into the receiving mold, and produce a primary processed product of deep-drawn utensils that has been previously drawn into a substantially straight shape. A method for manufacturing modified deep-drawn utensils, characterized in that after press-fitting into a receiving mold, a ring-shaped fastener is loosened and the workpiece is taken out from the receiving mold.