JP2662383B2 - Container cap manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a die for a container such as a drum.

[0002]

2. Description of the Related Art Conventionally, a base 10 for a container such as a drum can as shown in FIG. 4 is manufactured as follows.

[0003] First, from a flat material (blank), FIG.
The bottomed cylinder 51 whose opening edge protrudes outward in the radial direction as shown in FIG.

[0006] As shown in FIG. 6 (a), the cylinder 51 is set on a rotatable columnar receiving base 20.

[0005] Next, as shown in FIG.
The flange forming die 22 is positioned above the one opening edge projection 52. This flange forming die 22 has a flange forming groove 32 formed on the peripheral surface of a disk.
2 is lowered, and set so that the opening edge protruding portion 52 of the cylinder 51 is fitted into the groove 32. At the same time, the cylinder 51
The bottom of the cylinder 51 is pressed by the rotatable holding device A so as not to fall off.

[0006] While pressing the protruding portion 52 of the cylinder 51 with the receiving base 20 and the flange forming die 22, the receiving base 2
By rotating the die 22 and the flange forming die 22, the opening edge protruding portion 52 of the cylinder 51 is formed into a flange.

Next, as shown in FIG. 6 (c), the cylinder 51 formed with the flange is pulled out of the receiving table 20, and set so as to cover the spindle round die 21, and as shown in FIG. 6 (d). The die 23 having the pair of forming blades 33 and the forming blades 31 of the main spindle round die 21 is brought into contact with the cylindrical surface 53 of the cylinder 51,
The cylindrical wall 54 is sandwiched between the two dies 21 and 23, and the two dies 21 and 23 are rotated while being pressed against each other to form an axial screw on the cylindrical wall 54. At this time, the forming blade 31 of the main spindle round die 21 has a single-start thread, the forming blade 33 of the round die 23 has an n-start thread, and the main shaft round die 21 is rotated n times while the 23 round die is rotated once. .

[0008]

In the method of manufacturing a die as described above, since the flange forming step and the screw forming step are performed separately, it is necessary to replace the dies, which is problematic in terms of work efficiency. .

[0009] In addition, since this is a separate step, a simple flange forming step of the processing operation is omitted, and there is a possibility that defective products that have not been flange-formed may be mixed.

Accordingly, an object of the present invention is to solve such a problem in the manufacture of a die and to efficiently form a flange and a screw.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention covers a bottomed cylinder having a radially outwardly projecting portion on an opening edge on a screw-forming medium-round die, and a peripheral surface of the cylinder. The outer round die for screw forming having a pair of forming blades with the middle round die for screw forming, and the round die for forming a flange having a forming groove for forming the protrusion into a flange are respectively rotated. The shafts are brought into parallel contact, the cylindrical peripheral wall is sandwiched between the screw forming middle round die and the screw forming outer round die, and the protrusion is pressed between the flange forming round die and the screw forming middle round die. While rotating these round dies, it is an apparatus for manufacturing a die for a container by forming an axial screw of a cylindrical peripheral wall and forming a flange of a protruding portion, wherein the flange forming round die and the flange die are formed. Outer round dies for screw forming have the same rotation axis Arranged on the shaft, it is the two round die has to have become relatively movable in the axial direction.

With this configuration, when screw forming is performed between the outer round and the middle round dies, the flange forming round die is moved in the axial direction of the cylinder while the outer round die remains at the forming position in the axial direction. Although it is necessary to move, the outer round die and the flange forming round die are relatively movable, so the flange forming round die can move, forming the screw in the axial direction of the cylindrical peripheral wall and forming the flange of the protrusion. Can be performed simultaneously.

[0013]

1 to 3 show an embodiment of the present invention, and the same parts as those of the conventional example are denoted by the same reference numerals and description thereof will be omitted.

In this embodiment, in order to perform the flange forming and the screw forming efficiently without fail, a stepped cylindrical outer round die 1 shown in FIG. 2 to form a composite round die 11,
A spindle round die 2 having a pair of forming blades with the outer round die 1
No. 1 attempts to perform both flange forming and screw forming at the same time.

The outer round die 1 is a stepped cylinder having three different diameter portions, and the small diameter portion 12 is a rotating shaft.
The inner peripheral surface of the flange-forming round die 2 is loosely fitted to the outer peripheral surface of the middle diameter portion 13, and the flange-forming round die 2 is slidable in the axial direction along the outer peripheral surface. A forming blade 15 for thread cutting is formed on the outer peripheral surface of the large diameter portion 14.

On the other hand, as described above, the round die 2 for forming a flange is loosely fitted to the outer peripheral surface of the middle diameter portion 13 of the outer round die 1 so as to be slidable in the axial direction. 1 is fastened to a bolt 17 incorporated in the through hole 16 of the large diameter portion so as not to be separated from the outer round die 1. A spring 19 is inserted into another through hole 18 provided in parallel with the axis near the outer periphery of the large diameter portion of the outer round die 1, and the spring 19 is inserted between the plate surface 36 of the flange forming round die 2 and the lid 35. The round die 2 for forming the collar is always
Biased away from That is, FIG. 1 shows the original state of the apparatus before machining, but since the round die 2 for forming a flange and the outer round die 1 approach during machining (see FIGS. 2 and 3), the spring 19 finishes machining. Later, when the flange forming round die 2 and the outer round die 1 are separated from the workpiece, they play a role of separating them from each other and returning each to the original position.

The lid 35 is fixed by bolts 37 when assembling the apparatus. In addition, a plurality of the springs 19 and the bolts 17 for preventing separation of the flange forming round die 2 are provided at a position symmetrical to the center of the disk surface of the large diameter portion 14 of the outer round die 1, as described later. The balance is maintained when the round die 2 for forming a flange moves along the rotation axis of the outer round die 1.

A forming groove 3 for forming a flange is provided on the outer peripheral surface of the round die 2 for forming a flange. The outer diameter of the round die 2 for forming a flange and the diameter of the large diameter of the outer round die 1 are, as will be described later, the main shaft round die 2 for screw-forming the bottomed cylinder 51 of the workpiece together with the outer round die 1.
When set in such a manner that the groove 3 of the round die 2 for forming a flange and the forming blade 15 of the outer circular die 1 abut on the protruding portion 52 and the peripheral surface 53 of the cylinder 51 with a bottom, respectively. (See FIGS. 2 and 3).

The structure of the composite round die 11 in which the round die 2 for forming a flange and the outer die 1 for forming a screw are combined has been described above. The screw forming of the cylindrical peripheral wall 54 is performed as described above. One forming blade 15 and a pair of forming blades 3
This is performed using a spindle round die 21 having a number of 1. Hereinafter, the base 10 using the spindle round die 21 and the composite round die 11 will be described.
The molding step will be described.

Before starting the forming step, the work piece to be processed is a bottomed cylinder 5 whose opening edge protrudes radially outward from a flat material (blank) as shown in FIG.
1 is formed by circular drawing.

As shown in FIG. 1, the cylinder 51 is set in a manner to be inserted into the round spindle die 21, and its bottom is fixed by a rotatable disk-shaped holding device A so that the cylinder 51 does not fall off. Press horizontally from the left of the figure.

Next, as shown in FIG.
The molding groove 3 of the round die 2 for forming a flange of the composite round die 11 is positioned immediately above the opening edge protruding portion 52 of the cylinder 51 set at 1 and the composite round die 11 is lowered to form the groove 3.
Is fitted into the opening edge projection 52 of the cylinder 51. At this time, the forming blade 15 of the outer round die 1 of the composite round die 11 and the forming blade 31 of the main shaft round die 21 are respectively connected to the outer peripheral surface 53 of the cylinder 51.
And the inner peripheral surface, and sandwiches the cylindrical peripheral wall 54 from above and below.

When the composite round die 11 and the spindle round die 21 are rotated while pressing the peripheral wall 54 and the protruding portion 52 in the above state, the forming blade 15 of the outer round die 1 and the forming blade 31 of the spindle round die 21 are rotated. Thereby, a rolled screw along the axial direction is formed on the peripheral wall 54. In this embodiment, when the main spindle round die 21 is a single-start thread and the forming blade of the outer round die 1 of the composite round die 11 is an n-start thread, the composite round die 1
1 and the main spindle round die 21 are rotated at a ratio of n: 1.

When the cylindrical peripheral wall 54 is screw-formed, the outer die 1 of the composite die 11 remains at the forming position in the axial direction, and the flange forming die 2 is moved in the axial direction with respect to the main spindle round die 21. However, since the flange forming round die 2 is slidable in the axial direction with respect to the outer round die 1, even if the outer round die 1 is fixed, The flange forming round die 2 can move as the screw is formed, and the screw forming of the peripheral wall 54 and the flange forming of the protrusion 52 can be performed simultaneously. FIG.
It shows the state of the base 10 and the device when the molding of both the screw and the flange is completed.

After finishing the processing, the composite round die 11 is moved upward and retracted from the cylinder 51 where the forming is completed, and the flange forming round die 2 is moved from the outer round die 1 along the axial direction by the action of the spring 19. It moves away, and returns to the origin state of FIG.

Thus, in this embodiment, the composite round die 1 in which the outer round die 1 and the flange forming round die 2 are integrated
The screw forming and the flange forming can be performed in one step by using the main die 1 and the spindle round die 21.

[0027]

The present invention is configured as described above.
Screw forming and flange forming can be performed in a single step, and the number of steps is reduced, and labor for changing tools is also reduced as compared with the conventional case where these are performed in separate steps, thereby significantly improving work efficiency. In addition, there is no processing for forming the flange.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment.

FIG. 2 is a view showing a start of forming a die according to the embodiment;

FIG. 3 is a diagram showing the end of molding of the die according to the embodiment;

FIG. 4 is a perspective view of a base.

FIG. 5 is a view showing a cylinder serving as a base of the base;

FIG. 6 is a diagram showing a conventional embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer round die 2 Flange forming round die 3 Forming groove 11 Composite round die 12 Small diameter portion 13 Medium diameter portion 14 Large diameter portion 21 Spindle round die 51 Cylindrical 52 Projection 53 Peripheral surface 54 Peripheral wall

Claims (1)

(57) [Claims] 1. An opening edge having a radially outwardly projecting portion.
A cylindrical cylinder with a bottom
In each of the peripheral surface and the protruding part of the
Outer round die for screw forming having a pair of forming blades,
A collar for forming a flange having a forming groove for forming a protrusion into a flange.
The die is abutted with the axis of rotation parallel, and the peripheral wall of the cylinder is
It is sandwiched between the middle round die for screw forming and the outer round die for screw forming.
And the protruding part is a round die for flange forming and a middle round for screw forming.
Rotate those round dies while pressing and pressing with dies
To form and project screws in the axial direction of the cylindrical peripheral wall.
It is a device that manufactures the base of the container by forming the flange of the protrusion.
The round die for forming the flange and the outer die for forming the screw are turned around.
The rolling axes are arranged on the same axis, and both round dies are
Of containers characterized by being relatively movable
Base manufacturing equipment.