JPS5853143Y2 - Upper die for hot pressing of spherical plate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an upper mold for hot pressing of a spherical plate.

When molding a spherical plate (commonly known as a head plate) using a hot press, the head plate with a small diameter is placed inside the machine, and the head plate with a large diameter that cannot fit inside the machine is placed outside the press bed as shown in Figure 1. Place the lower mold A on the lower mold A, place the heated material B on the lower mold A, apply a rolling blade with the press E to the horizontal beam D whose one end is supported by the support C, and at the other end of this horizontal beam D. By pressing the upper mold F, molding is performed outside the machine.

Conventional upper molds F are made of cast iron or cast steel, or cast molds have a large weight relative to the product (end plate) and are expensive, so they are not suitable for mass production of small and medium-sized products. However, there were problems in terms of profitability when producing large-scale products in small quantities, and they were difficult to handle.

In view of the above points, an object of the present invention is to provide an upper mold for hot pressing of a spherical plate that is lightweight and can be manufactured at low cost.

The structure of the present invention will be explained in detail based on the first embodiment shown in FIGS. 2 to 4. A spherical shell center portion 1 having a thick spherical shape with a flat upper surface is provided at the center. ,
A thin spherical shell 2 constituting a hemisphere is integrally connected to the outer peripheral surface of this spherical shell center portion 1 by welding or the like.

A cylindrical central molded member 3 is fixed to the center of the upper surface of the spherical shell center part 1 by welding or the like.

Then, between the central molding material 3 and the spherical shell 2, a plurality of fan-shaped molding materials 4, . They are each fixed integrally by welding, etc.

In addition, fan-shaped reinforcing plates 5, . ...and spherical shell 2,
It is integrally fixed to the central molded member 3 by welding or the like.

The spherical shell 2 is configured to be filled with cooling water 6 for cooling.

Therefore, cooling water communication through holes 7 are provided in the central molding material 3, each molding material 4, . . . and each reinforcing plate 5, .
. . . are provided so that they can communicate with each other.

On the other hand, reference numeral 8 in Figure 3 is a drainage hole, which is sealed with a plug (not shown) during work.

Further, a fixing plate 9 is fixed to the upper surface of the central molded member 3, a platen NO. I am wearing it.

13 in the figure is a ring-shaped reinforcing plate.

The first embodiment of the present invention is constructed as described above, in which the spherical shell 2 is filled with cooling water 6, and one end of the horizontal beam D is connected to the upper surface of the downward force transmitting part 12, as shown in FIG. The upper mold is lowered by engaging with the cross beam D and applying a reduction blade to the cross beam D.

At this time, the rolling blade transmission members 1 and 2 are attached to the brackets 10 and 10.
' Since it is swingably attached to the top, pressure can always be applied toward the center even if the top surface is tilted.

The first embodiment of the present invention has the above-mentioned structure and function, and the spherical shell center part 1 on which the rolling blade is applied and each molding material 4, . . . are formed with thick walls. Therefore, it has sufficient strength.

Moreover, the spherical shell 2 is formed with a thin wall by the molding material 4.
, . . . has the function of preventing dents during molding.

Furthermore, since the spherical shell 2 is filled with cooling water 6, temperature rise is prevented, and there is no expansion or deformation, thereby improving molding accuracy.

Also, since it is hollow, the weight of the mold can be reduced.
It reduces manufacturing costs and is easy to handle.

Furthermore, during molding, the material is water-cooled by contact with the mold, and the deformation resistance is greater than that of non-contact parts, making it difficult to stretch.

As a result, the rate of decrease in thickness at the top of the spherical surface, which is a problem in molding, is reduced, and the yield of the material is improved.

Next, a second embodiment will be described with reference to the drawings shown in FIG. 5 and below. Partition walls 14 are provided at intervals on the inner surface of the spherical shell 2, and a water cooling chamber 15 is formed between the partition walls 14 and the spherical shell 2.

Then, an inlet pipe 16 is communicated with the upper end of the central molded member 3 through the reinforcing plate 5, a drain pipe 17 is communicated with the upper end of the partition wall 14, and both pipes are fixed on the reinforcing plate 13 with supporting plates 18, 18.
' is supported.

Since the other parts are the same as those in the first embodiment, the same reference numerals are given and the explanation will be omitted.

On the other hand, since the water cooling chamber 15 is provided, there is no need to provide through holes in the reinforcing plate 5 as in the first embodiment.

The second embodiment is constructed as described above, with the introduction pipe 16
Cooling water 6 is introduced into the central molded material 3 from the drain pipe 17.
This system forcibly circulates cooling water,
The spherical shell 2 is reliably cooled, and the cooling effect is superior to that of the first embodiment.

The other functions and effects are the same as those of the first embodiment.

The present invention has the above-mentioned structure and function, and since it is formed hollow, the weight of the mold can be reduced.
It reduces manufacturing costs and is easy to handle.

Furthermore, since the spherical shell is cooled with cooling water, the temperature of the spherical shell is prevented from rising, and there is no expansion or deformation, thereby improving molding accuracy.

Furthermore, during molding, the material is water-cooled when it comes into contact with the mold, and its deformation resistance is greater than that of non-contact parts, making it difficult to stretch.

As a result, the rate of decrease in the plate thickness at the top of the spherical surface, which is a problem in molding, is reduced, and the yield of the material is improved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory view showing hot pressing of a spherical plate, Fig. 2 is a plan view of the first embodiment of the upper die for hot pressing of a spherical plate according to the present invention, excluding the rolling force transmitting material, and Fig. 3 4 is a front view, FIG. 5 is a plan view of the second embodiment, and FIG. 6 is a longitudinal sectional view thereof. In the figure, 1 is a part of the spherical shell center, 2 is a spherical shell,
3 is a central molding member, 4 is a lip, and 7 is a cooling water communication hole.

Claims (1)

[Scope of utility model registration request] A thin spherical shell 2 is integrally provided on the outer peripheral surface of a thick spherical spherical shell center part 1, and a cylindrical central molding member 3 is fixed to the upper surface of the spherical shell center 1. 3 and the spherical shell 2, a plurality of fan-shaped molded materials 4, . . . are integrally fixed between the molded materials 4, . The through hole 7 is provided in the upper mold for hot pressing of a spherical plate with a water-cooled structure inside the spherical shell 2.