JPH0687045A - Device for forming constriction at opening edge of metal can - Google Patents

Abstract

PURPOSE: To provide a device for forming a constriction at the opening end part of a metal can. CONSTITUTION: This device is provided with a support member 4 for pushing a can in the axial direction 6 from a bottom part 5 of a can 3, an annular anvil 8 which is placed coaxially with the support member and which has, at its prescribed part, a modeling surface 9 having a form adapted to the desired shape of the constriction at a place away from the support member, and a freely-rotating roller 10 which has a form adapted to the shape of the modeling surface, which presses the end part of the can forcefully against the modeling surface, and moreover which is carried by the support member 1 driven along a circular path concentric to the annular modeling surface by a drive means. Thus, the axis 15 of rotation of the freely-rotating roller points at least approximately in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the work of providing a narrowing at the open end of a metal can.

[0002]

SUMMARY OF THE INVENTION For the above purposes, the present invention provides an apparatus for forming a constriction at the open end of a metal can with a cylindrical body. The apparatus according to the present invention comprises (1) a support member for supporting the bottom of the can and for pressing the can to move in the axial direction thereof, and (2) an annular anvil located coaxially with the support member. And the molding surface is located inside the annular anvil facing the support member, and the mold surface has a shape that matches the desired shape narrowing away from the support member. An annular anvil and (3) a revolving roller having a shape matching the mold of the molding surface, capable of strongly pressing the positioned end region of the can against the molding surface, and
A rotatable roller that is transported by a supporting member that is driven by a driving means along a circular orbit concentric with the annular molding surface, whereby at least the rotation axis of the rotatable roller is at least Approximately in the axial direction.

[0003]

During the use of the above device, a rolling motion occurs,
Meanwhile, the rim of the can is aligned so that it comes to the anvil. The edge of the can is strongly pressed against the anvil by the subsequent sufficient rolling motion of the orbitable roller. The molds of the anvil and the orbitable roller are matched with each other, and the narrowing that matches the mold can be obtained.

During operation, the can undergoes a gradual shifting movement in its axial direction. When the narrowing reaches the desired length, the operation ends. The type of narrowing is determined by the shape of the anvil and the orbitable roller.

The orbitable roller can have a center line of rotation in the same direction as the axial direction of the can. However, for convenience, the present device is characterized in that the rotation axis of the orbitable roller lies in a certain tangent plane and forms a small angle with respect to the axial direction. A very effective push-bend is made at that point and the material to be worked advances through the gap between the anvil ring and the roller. This is achieved with minimal axial force applied to the can wall.

In a particular embodiment, the angle is approximately 0.5 °.
Has a feature that is the size of.

In a practical embodiment, the orbiting roller bearing structure rotates with respect to a fixedly arranged can. This allows a very simple structure. It will be apparent that additional configurations are possible. Of importance here is the relative movement of the roller with respect to the can.

The rollers and anvil must be very rigid. For satisfactory durable use, it is conceivable, for example, to be made of hard alloys or other materials with high wear resistance and hardness.

A certain degree of flexibility in the structure helps to properly position the cooperating surfaces under any circumstances. Excessive rigidity in the above structure results in extremely large forces that can adversely affect the life of the device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus according to the present invention will be described in detail below with reference to the embodiments shown in the drawings. 1 and 2 show a device for forming a constriction at the open end of a metal can 3 with a cylindrical body, which device supports the bottom 5 of the can 3 and a control unit (not shown). A supporting member 4 for pressing and moving the can in the axial direction 6 by a pressing member 7 controlled by an appropriate method, and an annular anvil 8 positioned coaxially with the supporting member 4. Anvil support member 4
An annular anvil 8 having a molding surface 9 located on the inner side facing to the molding surface, the molding surface 9 having a shape that matches a desired shape of the narrowing 2 at a position apart from the supporting member 4. , A orbitable roller 10 having a shape which also matches the shape of the desired narrowing 2 and therefore matches the shape of the molding surface 9.
An externally located pinion 13, which can press the positioned end region of the can 3 strongly against the molding surface 9 and cooperates with a drive gear 14 which is connected to a drive motor (not shown). And a rotatable roller 10 which is adapted to be transported by a support member 11 forming a part of the rotor 12 so that the rotor 12 can be rotated and moved. Laura 1
0 is driven by a circular orbit with respect to the annular molding surface 9, and its rotation axis 15 is directed at least approximately in the axial direction 6.

The support member 4 slides in the axial direction while being guided in the cylinder block 16 forming a part of the machine frame 17. An annular anvil 8 is clamped in the machine frame 17, and a rotor 12 is rotatably connected to the machine frame 17 by means of a bearing unit 18.

The support member 11 is fixed to the rotor 12 by a pivot shaft 19. As can be seen in FIGS. 1 and 2, the rotatable roller 10 is firmly engaged at least within a predetermined radial direction. The rotation status of the rotor 12 is indicated by 20.

The rotating shaft 15 of the rotatable roller 10 lies substantially in the tangential plane and makes an angle of approximately 0.5 ° with the axial direction 6. In Figures 1 and 2, this angle is exaggerated somewhat for clarity. In order to obtain the correct angle, the rotor 12 is held on one side by a pressure spring 21 and by means of an adjusting screw 22 pushing the rotor 12 on the other side the spring pressure 21
To be positioned within a predetermined angle.
The orbitable roller 10 is rotatably supported by the support member 11 by means of a roller bearing 24.

FIG. 3 shows the interaction of the molding surface 9 of the anvil 8 and the shape of the roller 10. In the situation shown in FIG. 3, the can 3 is guided to the molding area between the anvil 8 and the roller 10. As a result of the rolling movement of the roller 10 on the annular inner peripheral surface of the anvil 8, the can is pulled inward from its open end 23, thereby forming a constriction 2 as shown in FIG.

[0015]

As is apparent from the above description, the device of the present invention is designed to strongly press the edge of the can against the anvil by the rolling operation by the orbiting roller, so that the device can freely orbit the anvil. The can wall sandwiched between the roller and the roller of (3) provides a narrowing that matches the mold. At that time, since the rotary shaft of the orbitable roller is made to have a slight angle, a very effective pressing and bending is performed, and the material to be processed advances through the gap between the anvil ring and the roller. This causes the force to be exerted on the can wall to live with minimal axial force.

[Brief description of drawings]

1 is a cross-sectional view of an apparatus according to the present invention.

FIG. 2 is an enlarged view showing details of a II portion in FIG.

[Fig. 3] In a situation where molding is being performed,
Sectional drawing of an anvil and the roller which can be rotated freely.

FIG. 4 is a view showing an end wall surface of a can after being processed by the apparatus according to the present invention.

5 is a perspective view of a can narrowed down by the device of FIG.

[Explanation of symbols]

 1 Device according to the present invention 2 Narrowing 3 Metal can 4 Support member 5 Bottom of can 6 Axial direction 7 Pressing member 8 Annular anvil 9 Molding surface 10 Orbitable roller 11 Support member 12 Rotor 13 Pinion 14 Drive gear 15 Roller rotation Shaft 16 Cylinder block 17 Machine frame 18 Bearing unit 19 Pivot shaft 20 Rotor rotation status 21 Pressure spring 22 Adjusting screw 23 Can open end

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Herit Willem Brillmann Enuel-7437 Netherlands, Enuel-7437 Seiks Batmen, Burger Boftstraran 3 (72) Inventor Johann Willem Lutherdink Netherlands, Enuel-7214 Sesei Epse, Het Diekman No. 26

Claims (3)

[Claims] 1. A device for forming a narrowing at an open end of a metal can with a cylindrical body, comprising: (1) supporting the bottom of the can and pressing the can in its axial direction to move it. And a supporting member for (2) an annular anvil located coaxially with the supporting member, the molding surface being located inside the one facing the supporting member of the annular anvil. An annular anvil having a shape that matches a desired shape narrowing away from the support member, and (3) a orbitable roller having a shape that matches the shape of the molding surface, the roller being positioned. The can end region can be strongly pressed against the molding surface, and
And a rotatable roller that is transported by a support member that is driven by a driving member along a circular orbit concentric with the annular molding surface, whereby at least the rotary shaft of the rotatable roller is at least A device characterized by being directed substantially in the axial direction. 2. The device according to claim 1, wherein the rotation axis of the orbitable roller lies in a tangent plane and forms a small angle with the axial direction. 3. The device according to claim 2, wherein the angle with respect to the axial direction is approximately 0.5 °.