JPH0242339Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a mold device for manufacturing cylindrical containers such as round cans mainly used for food products.

<Prior art> Conventional round can containers, which are cylindrical containers of this type, require a first step of drawing a sheet material into the shape of a round can container, and a flange-like shape remaining at the mouth of the container made by this step. It is manufactured through a second step of cutting out the rim of the mouth.

<Problem that the invention aims to solve> In this conventional manufacturing method, there are two steps, so a press machine with a separate mold for each step is required.
In addition, conveyor means such as conveyors and chutes are also required between each machine.

Therefore, in addition to the high capital required for manufacturing equipment,
Since the installation space for manufacturing equipment also increases, there is a problem in that the manufacturing cost of round can containers increases.

<Means for Solving the Problems> In the present device, as shown in FIG. 1, the lower die 10 on the fixed side includes a circular die center 11 and a pressing ring 12 provided outside the die center 11 so as to be able to descend. It further comprises an annular die cut 13 provided on the outside of this pressing ring 12.

A die center 11 is located below the die center 11.
Trimming cutter 3 with a concentric cutter edge
3 is provided, and this trimming cutter 33 cuts the die center 11 by the width of the defined lip of the product container.
stands out from

On the other hand, the upper mold 20 includes a punch center 21 that comes into contact with the die center 11 when descending, an annular draw ring 22 that comes into contact with the trimming cutter 33 and is prevented from descending, and a draw ring 22 that comes into contact with the press ring 12 and stops it. An annular punch cutter 23 for pressing down and a stripper 24 for sandwiching the material plate a in contact with the die cutter 13 are provided.

The punch cutter 23 is configured to be able to descend by sliding against the inner surface of the die cutter 13 and lower to a position below the draw ring 22, and the outer surface 221 of the draw ring 22 is connected to the outer surface 331 of the trimming cutter 33. It is made to form a continuous surface.

<Operation> Since the device of the present invention is as described above, the upper mold 20 is lowered from the state shown in FIG. 1 to the state shown in FIG. The edges are cut at the same time as press forming. That is, when the upper mold 20 descends, the punch center 21 of this mold first comes into pressure contact with the die center 11 of the lower mold 10 when the punch cutter 23 cuts off the material plate a, and then the punch cutter 23 presses the pressing ring 12. While descending, it descends together with the drawling 22.

At this stage, the material plate a is compression-molded into a round can container shape by the draw ring 22, and when the draw ring 22 comes into contact with the trimming cutter 33, the flange-like mouth edge a' is pressed against the punch cutter 23. and the pressing ring 12.

Since the punch cutter 23 descends even after the draw ring 22 stops, at this stage the flange-like edge a' of the material plate a is cut by the edge of the trimming cutter 33, and the edge of the round can container A is cut off. It will be formatted.

<Example> FIG. 1 is a longitudinal cross-sectional view showing the main parts of the present device, in which a round can-container-shaped product A is actually blown away by air from a blower device (not shown) and discharged. The product A is compression-molded between the lower mold 10 on the fixed side and the upper mold 20 on the movable side, and at the same time, the edges are cut and collected.

The lower mold 10 includes a circular die center 11 fixed at the center, a press ring 12 surrounding the die center 11, and an annular die cutter 13 into which the press ring 12 is fitted. The die center 11 is provided with a blow hole 111 opening at the center thereof, and the product A is peeled off from the die center 11 by jet air from there.

The lower mold 10 is attached to a lower die set 30, the die center 11 is fixed to the die set 30 via a center plate 31, and the press ring 12 is supported by a cushion pin 32 so as to be lowerable.

A trimming cutter 33 of the die set 30 is provided below the die center 11, and the pressing ring 12 is set so as to be able to descend below the trimming cutter 33.

The trimming cutter 33 has a cutter edge C that is concentric with the die center 11, and is set so that the cutter edge C protrudes from the die center 11 by the width of the mouth edge defined in the product container.

On the other hand, the die cutter 13 is fixed to the die set 30, and the cutter width 131 at its upper edge is close to the outer edge of the press ring 12 so as to lightly touch it.

Therefore, the lower mold 10 includes a circular die center 11 fixed to the die set 30, an annular die cutter 13 fixed to the outside thereof, and a pressing ring 1 provided so as to be lowerable between the die center and the die cutter.
2.

The upper mold 20 is attached to an upper die set 40 that moves up and down, and includes a circular punch center 21, an annular draw ring 22, an annular punch cutter 23, and an annular stripper 24 arranged concentrically. , and the above die set 40
has a support rod 41 to which the punch center 21 is fixed at the lower end, and a pedestal 42 through which the support rod 41 is inserted. The drawer ring 22 is mounted on the pedestal 42.
and a supporting frame 43 to which the punch cutter 23 is attached, and a spring 44 for supporting the stripper 24.

The punch center 21 compresses the material plate a by coming into pressure contact with the die center 11 of the lower mold 10, and thereby forms the bottom surface of the round can container A. 2
The punch cutter 2 and the punch cutter 23 are set to be lowered simultaneously when the base 42 is lowered so as to come into contact with the press ring 12 of the lower mold 10 and press it down.

The draw ring 22 is made in an annular shape,
It has an outer surface 221 that is prevented from descending by coming into contact with the trimming cutter 33 of the die set 30 and forms a continuous surface with the outer surface 331 on which the cutter edge C of the trimming cutter 33 is located at this time, and When descending, a gap is formed around the outer periphery of the die center 11 to allow the material plate a to be inserted therein.

The punch cutter 23 is connected to the draw ring 2.
2 is made into an annular body that slides on the drawling 22 on the outside thereof, and is formed so that its lower surface 231 is flush with the lower end 222 of the drawling 22, and the drawling 22 is After coming into contact with the trimming cutter 33 and stopping, it is set so that it can be lowered slightly by itself, and at this time, it rubs against the outer surface 331 of the trimming cutter 33 and passes through the cutter edge C.

For this purpose, the draw ring 22 is connected to the support frame 43 through a gap S by a pressing spring 431, and therefore, when the base 42 is lowered, the punch cutter 23 is moved downward from the draw ring 22 by the width of the gap S. Can descend.

The stripper 24 is pressed by a spring 44 and is held at the same height as the punch cutter 23, and the punch cutter 23 is configured to slide in contact with the inner surface. The material plate a is set to be pressed against the die cutter 13 of the mold 10.

Since the present device is as described above, when the press machine is operated and the upper die set 40 is moved up and down once, the material plate a is moved into the round can container A as shown in FIGS. 3 to 7. At the same time as being formed, the edge flange portion a' is edged.

The operation of the present device will be explained below with reference to FIG. 3 and subsequent figures.

First, when the upper die set 40 descends, the upper die 20 descends and comes into contact with the material plate a. At this time, the material plate is pressed against the die cutter 13 of the lower mold 10 by the stripper 24, and the punch cutter 23 passing through the die cutter 13
3, a circularly cut material plate a remains inside the die cutter 13, as shown in FIG.

Then, as the upper die set 40 descends further,
As shown in FIG. 4, the punch cutter 23
2 is lowered and fitted onto the die center 11, so that the bottom surface of the material plate a is formed by the die center 11 and the punch center 21, and the peripheral wall is formed by the draw ring 22, so that the material plate a is shaped like a round can container. compression molded.

At this time, the periphery of the material plate a forms a flange-like mouth edge a', and the punch cutter 23
It is pressed into the press ring 12.

Even after the draw ring 22 comes into contact with the trimming cutter 33 and stops descending, the upper die set 40 can further descend by the width of the gap S between the draw ring 22 and the support frame 43, as shown in FIG. Descend while filling the gap S and punch cutter 2
3 to below the trimming cutter 33. When the punch cutter 23 is lowered independently in this manner, the flange-like rim a' is cut off and removed by the punch cutter 23, and the shaping of the rim of the round can container A is completed.

Subsequently, when the upper die set 40 starts to rise, compressed air is injected from the direction of the arrow as shown in FIG. It is peeled off and floated.

As the die set 40 continues to rise and approaches the top dead center as shown in FIG. is replenished,
Preparations are made for the next molding process, and the above molding operations are repeated.

In the above embodiment, the round can container A was used as an example of the cylindrical container, but the present device is not limited to this and can be implemented with other cylindrical containers.

<Effects of the invention> Since the proposed device is as described above, one press machine can perform the compression molding process of a cylindrical container,
The edge cutting process of the flange-shaped mouth edge a' can be performed at the same time, which has the effect of reducing equipment investment and making it possible to manufacture and sell inexpensive products.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the proposed device when the upper mold is raised, Figure 2 is a vertical cross-sectional view of the same when the upper mold is lowered, and Figure 3 is a vertical cross-sectional view of the device when the upper mold is lowered.
7 to 7 are schematic explanatory diagrams showing the operation of the present device step by step. In the figure, 10 is the lower mold, 11 is the die center, and 12
is a pressing ring, 13 is a die cutter, 20 is an upper mold,
21 is punch center, 22 is drawling, 23
24 is a punch cutter, 24 is a stripper, 33 is a trimming cutter, A is a round can container as a cylindrical container, a is a material plate, and a' is a flange-shaped mouth edge.

Claims (1)

[Scope of utility model registration request] It has a lower mold on a fixed side and an upper mold on a movable side that moves up and down with respect to the mold, and the lower mold has a circular die center and a circular die center that fits into the die center and is supported so as to be lowerable. The upper mold includes a pressing ring provided on the outside of the pressing ring, and an annular die cutter provided on the outside of the pressing ring. A circular punch center that comes into pressure contact with the die center of the lower mold after this point, an annular punch cutter that comes into pressure contact with the press ring and presses it down after the punch center comes into contact with the punch center, and a circular punch cutter that descends to the outside of the die center together with the punch cutter. A trimming cutter is provided below the lower mold to stop the drawing by contacting the drawling during descent, and this trimming cutter has a cutter edge concentric with the die center and The edge of the cutter is made to protrude from the die center by the width of the edge determined for the product container, and the punch cutter is made to slide and slide over the edge of the trimming cutter after the drawing has stopped and descend. A mold device for manufacturing the constructed cylindrical container.