KR20100109078A - Necking device and method of square can - Google Patents

Abstract

PURPOSE: A square can necking apparatus and a necking method are provided to improve quality by necking a square can without the deformation of the material of the neck portion. CONSTITUTION: A square can necking apparatus comprises a fixing shaft(100), a clamping unit(200), a guide unit(300), a rotating unit(400), a cam unit(500), and a pressing unit(600). The fixing shaft is elevated by the outer power. The clamping unit is inserted into the square can and is expanded to the outside to fix the end of the square can. The guide groove of the guide unit forms a square locus along the edge to correspond to the rim of the square can. The cam unit is rotated around the fixing shaft at different speed with a rotating unit. The top of the pressing unit is moved by the speed difference of the cam unit and the rotating unit.

Description

Rectangular can necking device and necking method {Necking device and method of square can}

The present invention relates to a rectangular can necking device and a necking method, and more particularly, a rectangular can necking device and a necking method capable of forming a neck by pressing the edge of the rectangular can end inward to stack the rectangular cans in multiple layers. It is about.

A can container is generally manufactured by forming a body by rolling a metal plate and forming a top and bottom plates to seal both ends of the body, and then manufacturing a can container having sealing property by seaming between the top and bottom plates and the body.

This process usually includes a cutting process of cutting the metal plate material to an appropriate size, a manufacturing process of manufacturing an upper and lower plate of an appropriate size, a welding process of fusion welding the cut metal plate material by welding, and a welding machine of the completed fuselage. A folding process, a paneling process to maintain the shape of the folded body, and a flange process to open the upper and lower ends for seaming the body, and to combine the upper and lower plates respectively coupled to the upper and lower ends of the body. It is well known that the seaming process is performed through a test process for filling air by filling the finished product with seaming to check for leakage.

The can containers manufactured as described above are mostly circular cans, and the upper end diameter is smaller than the lower end diameter so that the upper end is inserted into the lower end in order to be stacked in multiple layers for storage. This operation is called necking, and many devices for necking a circular can have been developed.

However, in addition to the circular cans, rectangular cans (usually 18 L) having a rectangular parallelepiped shape are widely used, but there are some known devices for necking rectangular cans.

First, in the case of pressing at a time by the inner mold and the outer mold can be necked quickly, but there are also wrinkles in the neck portion, in particular, a lot of wrinkles occur in the corner portion has the disadvantage of reducing the quality of the product.

In addition, since pressing at a time, deformation of the material may occur due to cracking or fatigue due to plastic deformation, which may reduce the reliability of the product.

The present invention has been made to solve the above problems and an object of the present invention is to provide a rectangular can necking device and a necking method which can be necked by gradually pressing while rotating along the edge of the rectangular can.

The present invention for achieving the above object, the device for necking the edge of the rectangular can end, the fixed shaft which is elevated by external power; A clamping means coupled to a lower portion of the fixed shaft and inserted into the rectangular can and extending outward to fix an end of the rectangular can; A guide means coupled to the fixed shaft at an upper portion of the clamping means, and having a guide groove formed on a lower surface thereof to form a quadrature trajectory along an edge to correspond to a rectangular can border; Rotation means guided by the guide means and rotating about the fixed shaft; A circular cam means rotating at a different speed from the rotating means about the fixed shaft on an outer side of the rotating means and having a protrusion formed at an edge thereof; The upper portion is moved by the speed difference between the rotating means and the cam means in contact with the cam means, and the lower portion is hinged to the lower side of the rotating means to move along the edge of the rectangular can and press the rectangular can edge inwards. Pressing means; characterized in that consisting of.

Preferably, the clamping means is an expansion cone which is driven up and down in the fixed shaft, the sliding key is slid in all directions by the rising of the expansion cone, and the sliding key is extended to the vertex side of the rectangular can by pressing the sliding key and the outer surface Characterized in that the expansion mold formed inclined neck.

Preferably, the rotating means is inserted into the guide groove and the guide roller to move along the guide groove, the rotary lever rotatably coupled to the guide roller, form a circular plate and rotatably coupled around the fixed shaft The lower portion is characterized by consisting of a head rotatably coupled to the rotary lever, and a head gear for rotating the head.

Preferably, the cam means comprises a drive cam which forms a circular plate shape and is rotatably coupled around the fixed shaft on the outside of the rotating means and has a protruding portion protruding at an edge thereof, and a drive cam gear for rotating the drive cam. It features.

Preferably, the protruding portion includes a first inclined portion having an inclination, a second inclined portion having a smaller inclination than the first inclined portion, and a horizontal portion formed horizontally adjacent to the second inclined portion.

Preferably, the pressing means is a cam roller in contact with the cam means, a drive cam lever rotatably coupled to the cam roller on one side and elastically supported inward, and a drive shaft having an upper end coupled to the other side of the drive cam lever. And a driving lever coupled to a lower end of the drive shaft, a necking lever of which one side is coupled to the driving lever, and a center of which is hinged to a lower portion of the rotating means, rotatably coupled to the other side of the necking lever, and to the clamping means. It characterized by consisting of a necking roller for pressing the square can frame inward while moving along the fixed square can frame.

In another aspect, the present invention provides a method for necking the edge of a rectangular can, comprising: a fixing step of fixing the rectangular can by clamping means inserted into the rectangular can and extending outward to fix the rectangular can end; An access step in which the pressing means rotating along the outside of the edge of the rectangular can fixed in the fixing step approaches the edge of the rectangular can; A pressing step of performing necking by gradually pressing inward while the pressing means approached in the approaching step rotates in contact with a rectangular can rim; And a finishing step of finishing the necking of the square can border while the pressing means for gradually pressing the pressing step in the pressing step rotates the pressed state of the square can frame.

The effect of the present invention by the configuration as described above is not pressing and necking at a time as in the prior art, because the pressing means is gradually pressed while rotating along the edge of the square can, wrinkles do not occur, in particular, wrinkles of the corner portion Not only can it be minimized, but the material of the neck can be necked undeformed, thus improving the quality.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. The following description and the accompanying drawings are presented for the overall understanding of the present invention, and thus the technical scope of the present invention is not limited thereto. And a detailed description of known configurations and functions that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a cross-sectional view showing a rectangular can necking device according to an embodiment of the present invention.

The present invention is largely composed of a fixed shaft 100, clamping means 200, guide means 300, rotation means 400, cam means 500, pressing means 600.

The overall coupling relationship and the operating relationship of the present invention is fixed to the fixed shaft 100, which does not rotate and move up and down by an external power, such as a hydraulic cylinder 110 in the center, the fixed shaft 100 is coupled to the fixed shaft Clamping means 200 and inserted into the inside of the rectangular can to be lowered and necked as the 100 is lowered to secure the rectangular can rim, and the fixed shaft 100 and the upper side of the clamping means 200 A guide means 300 having a guide groove 310 that is fixed and coupled to form a quadrature trajectory on the lower surface, a rotation means 400 that follows the trajectory of the quadrangle by the guide groove 310, and the fixed shaft ( Rotating around the rotation means 400 outside the center 100, a circular cam means 500 having a protrusion 510 formed on the edge, and one side rotates in contact with the cam means 500 and the other side rotates. The rotational speed coupled to the means 400 To draw a locus of a square with 400 to rotate along the edge of the square cans while gradually approaching the inner side by the protruding portion 510 comprises a pressing means (600) for necking the can to press the rectangular border.

First, the fixed shaft 100 to be described, as shown in the circular shaft shape and the upper end is connected to the cylinder 110 can be driven up and down, the lower end of the clamping means 200 and guide means (described below) 300 is fixed and coupled, the outer rotation means 400, the cam means 500 is coupled to each rotate.

Next, the clamping means 200 will be described with reference to FIGS. 1 and 2. Figure 2 is a cross-sectional view and a bottom view showing the clamping means of the present invention shown in Figure 1, the upper figure is a side cross-sectional view, the bottom figure is viewed from below.

The clamping means 200 may be composed of an expansion cone 220, a sliding key 240, an expansion mold 260, the expansion cone 220 can be moved up and down separately from the fixed shaft 100 The sliding key 240 in contact with the side when raised has a square pyramid shape cut off the top as shown so that it can be pushed out.

The sliding key 240 is formed in a bar shape (bar), each of the four is formed so as to be in contact with the outside of the expansion cone 220, that is, to move up and down, left and right.

In addition, four expansion molds 260 are arranged in close contact with each of the sliding keys 240, as shown in the bottom view of FIG. Sliding is possible. Accordingly, when the expansion cone 220 is raised, the sliding key 240 is pushed out, thereby expanding the expansion mold 260 while being pushed outward, thereby eventually bringing the end of the rectangular can into close contact with the inner surface of the rectangular can. Can be fixed

The outer surface of the sliding key 240 and the expansion mold 260 is formed with a neck-shaped bend inward, the rectangular can is in close contact and bent (bending) by the pressing means 600 to be described later A neck n of shape is formed.

And the expansion cone 220, sliding key 240, expansion mold 260 is coupled to the body 280, respectively, and operates smoothly.

Next, the guide means 300 has a flat plate shape and is installed above the clamping means 200 at the bottom of the fixed shaft 100. A guide groove 310 is formed along a rim of the lower surface of the guide means 300. The trajectory of the guide groove 310 forms a quadrangle to correspond to the shape of a rectangular can. Pressing means 600 to be described later is to move along the trajectory of the guide groove 310 to press along the edge of the rectangular can.

Next, the rotating means 400 will be described with reference to FIGS. 1 and 3. 3 is a cross-sectional view showing a rotating means and a cam means of the present invention shown in FIG.

The rotating means 400 is composed of a guide roller 420, a rotary lever 440, a head 460, a head gear 480, the guide roller 420 is inserted into the guide groove 310 to the It is a roller that moves while rolling along the guide groove 310.

And the rotation lever 440 is coupled to the guide roller 420 to extend outward, the guide roller 420 is rotatably coupled. At this time, the rotation lever 440 is a '-' shaped angle is appropriate, the guide roller 420 is coupled to the bottom and the head 460 is coupled to the top.

The head 460 is configured to rotate about the fixed shaft 100 and has a circular plate shape into which the fixed shaft 100 is inserted at the center thereof, and rotatably with the upper portion of the rotary lever 440 on the outer lower surface. Combined.

The top of the head 460 is provided with a head gear 480 is rotated in conjunction with an external drive, the rotation of the head 460 is rotated and rotatably coupled to the head 460 440 also rotates, in which the guide roller 420 coupled to the rotary lever 440 is moved along the guide groove 310 of the guide means 300 so that the rotary lever 440 has a rectangular shape. It will rotate while drawing the trajectory.

For reference, the rotating means 400 rotates about 60 rpm.

Next, the cam means 500 will be described with reference to FIGS. 3 and 4. Figure 4 is a plan view of the rotating means and the pressing means of the present invention shown in Figure 3, the enlarged portion of Figure 4 is an enlarged view of the projection of the cam means.

The cam means 500 is coupled to the outside of the rotating means 400 to rotate at a different speed from the rotating means 400 about the fixed shaft 100, the drive cam 520 and the drive cam gear 540.

As shown, the drive cam 520 has a protrusion 510 protruding outward from the edge of the circular flat plate. The drive cam 520 is rotated at a different speed from the head 460 around the fixed shaft 100 in a state placed outside the head 460 of the rotating means 400.

In this case, the protrusion 510 may include a first inclined portion 512, a second inclined portion 514, and a horizontal portion 516 having different inclinations as shown in the enlarged view. While 512 has a relatively steep slope, the second slope 514 has a gentle slope, and the horizontal portion 516 is horizontally formed without any slope. In other words, the continuous running from the outer periphery of the drive cam 520 to the first inclined portion 512, the second inclined portion 514, the horizontal portion 516, and finished with the outer periphery of the drive cam 520 again. Forms a formal form.

In addition, the drive cam 520 is provided with the drive cam gear 540 on the top, and rotates by an external driving force, which causes the drive cam 520 to rotate, as described above. The drive cam gear 540 rotates in the same direction at different speeds, and preferably, the head gear 480 rotates at a relatively higher speed than the drive cam gear 540.

Next, the pressing means 600 will be described with reference to FIGS. 3, 4, and 5.

5 is a bottom view of the rotating means and the pressing means of the present invention shown in FIG.

The pressurizing means 600 includes a cam roller 610, a drive cam lever 620 coupled to and supported by the cam roller 610, and a drive shaft 630 coupled to and supported by the drive cam lever 620. , A driving lever 640 coupled to the drive shaft 630, a necking lever 650 linked to the driving lever 640, and a necking roller supported and rotatably coupled by the necking lever 650. It consists of 660.

The cam roller 610 and the necking roller 660 is a general roller that rotates, and the cam roller 610 is rolled in contact with the driving cam 520 at the top, and the necking roller 660 is formed at the bottom of the rectangular can. It is arranged to press while rolling along the rim.

In addition, the driving cam lever 620 is coupled to support the cam roller 610 horizontally inward as shown in FIG. 4, and is elastically supported inwardly by a spring 622 at an upper end thereof. It is fixed on the head 460. That is, the cam roller 610 is always kept in contact with the driving cam 520 by being tensioned inward by the spring 622.

In addition, the outer side of the drive cam lever 620, the rod-shaped drive shaft 630 is coupled in a standing state, it is not coupled to each other rotationally.

5, the driving lever 640 is fixedly coupled to the lower end of the driving shaft 630, and the driving lever 640 and the necking lever 650 are linked by the link 670.

The necking lever 650 is arranged horizontally, the center is hinged (h) and the lower portion of the rotary lever 440, one side is coupled to the driving lever 640 and the necking roller 660 is rotated on the other side Possibly combined.

Accordingly, when the cam roller 610 passes through the protrusion 510 of the driving cam 520, the spring 622 is tensioned, and the driving cam lever 620 rotates at a predetermined angle and is coupled to the driving shaft ( 630 also rotates and the driving lever 640 also rotates by the rotation angle of the driving cam lever 620. When the driving lever 640 rotates based on the driving shaft 630, the necking lever 650 connected to the link 670 in FIG. 5 rotates around the center of the hinged h and the necking roller ( 660 may be in contact with or separated from the edge of the rectangular can.

Hereinafter, an operation process of the present invention will be described with reference to FIG. 6. 6 shows an operational state diagram of the present invention. Here, (a) is a state in which the pressing means approaches the inside in the state where the clamping means is fixed to the square can, the necking roller rotates while pressing the edge of the square can, (b) is pressed in the state that the clamping means is not expanded The means simply rotates along a rectangular can border.

The fixed shaft 100 located above the rectangular can is lowered by the operation of the cylinder 110, and when the clamping means 200 is inserted into the rectangular can, the expansion cone 220 is moved upward. Sliding keys 240 are slid out and pushed, thereby expanding the mold 260 which is in contact with the sliding key 240 is in close contact with the inside of the rectangular can.

In this state, the head gear 480 and the driving cam gear 540 linked to the external power rotate in the same direction at different speeds, but the head gear 480 rotates at a relatively high speed.

Thus, the guide roller 420 rotates the head 460 coupled to the headgear 480, rotates the rotary lever 440 coupled to the head 460, and is coupled to the end of the rotary lever 440. ) Rotates, the guide roller 420 is inserted into the guide groove 310 is rotated while drawing the trajectory of the square along the guide groove 310.

In addition, since the drive cam 520 coupled to the drive cam gear 540 rotates at a slower speed than the head 460, the drive cam 520 lags behind as time elapses. This results in the same as 520 rotating opposite to the head 460.

As such, the cam roller 610 in contact with the drive cam 520 while the head 460 and the drive cam 520 are rotated is coupled to the head 460 at the same speed as the head 460. Since the rotation is to move along the outer periphery of the drive cam 520 and when passing through the first inclined portion 512 to reach the protrusion 510 and gradually away from the center of the fixed shaft 100 The drive shaft 630 connected to the drive cam lever 620 rotates at a predetermined angle.

In other words, the necking lever 650 connected to the link 670 by the driving shaft 630 is rotated in the outward direction (clockwise direction on the drawing) to the rotation of the driving lever 640, the center of the hinge coupling (h) Rotate in a counterclockwise direction so that the necking roller 660 approaches the edge of the square can.

At this time, when the cam roller 610 passes along the inclination of the first inclined portion 512 and moves along the second inclined portion 514 having a relatively inclined slope, the necking roller 660 is a The necking roller 660 is gradually pressed and bent while rotating around the rectangular can.

When the cam roller 610 subsequently reaches the horizontal portion 516 after passing through the second inclined portion 514, the necking roller 660 no longer moves to the inside of the rectangular can and stops and is pressurized. Rotate the square can border to form a neck.

Hereinafter, a rectangular can necking method according to another preferred embodiment of the present invention will be described. 7 is a flow chart showing a rectangular can necking method according to an embodiment of the present invention, Figure 8 is a cross-sectional view showing the shape of the rectangular can necked by the rectangular can necking device and the necking method of the present invention. For reference, the detailed configuration of the clamping means, the guide means, the rotating means, the cam means, the pressing means which is a means used in the necking method described later is similar to that described in the necking device.

The rectangular can necking method of the present invention can be necked through the fixing step (S10), access step (S20), pressing step (S30), finishing step (S40).

The fixing step (S10) is a step of fixing the end portion of the rectangular can by inserting the clamping means 200 inside the rectangular can using the clamping means 200 and extending outward.

Then, when the square can is fixed in the fixing step (S10), the pressing means 600 is guided by the guide means 300 along with the rotating means 400 along the edge of the square can to draw the trajectory of the square. While rotating while approaching step (S20) to quickly approach by the cam means 500 can be performed.

Next, when the pressing means 600 approaches the rectangular can and contacts the rectangular can, a pressing step S30 is performed to gradually rotate the rectangular can rim to the inside, and as the rotation is repeated, the rectangular can rim gradually increases. Unlike the prior art forming the neck (n) in a mold at a time, because the pressing means 600 is slowly pressed while turning along the edge of the square can, so that deformation or cracking of the material does not occur.

Next, the finishing step (S40) is the pressing means in a state in which the rectangular can border is bent through the pressing step and then completely in close contact with the neck (n) portion formed on the outer peripheral surface of the sliding key 240 and the expansion mold 260. 600 is a step of finally completing the necking only by rotating in a state in which the rectangular can is pressurized without proceeding further inward.

As described above, it can be seen that the present invention does not form necking with two molds at a time, but rather forms a core technical idea by gradually pressing the neck while rotating a rectangular can frame.

1 is a cross-sectional view showing a rectangular can necking device according to an embodiment of the present invention.

2 is a cross-sectional view and a bottom view of the clamping means of the invention shown in FIG.

3 is a cross-sectional view showing the rotating means and the pressing means of the present invention shown in FIG.

4 is a plan view of the rotating means and the pressing means of the present invention shown in FIG.

5 is a bottom view of the rotating means and the pressing means of the present invention shown in FIG.

6 is an operational state diagram of the present invention.

7 is a flow chart showing a rectangular can necking method according to an embodiment of the present invention.

Figure 8 is a cross-sectional view showing the shape of the rectangular can necked by the rectangular can necking device and necking method of the present invention.

<< Explanation of main parts of drawing >>

100: fixed shaft 110: cylinder

200: clamping means 220: expansion cone

240: sliding key 260: expansion mold

280: body

300: guide means 310: guide groove

400: rotating means 420: guide roller

440: rotary lever 460: head

480 headgear

500: cam means 510: protrusion

512: the first slope portion 514: the second slope portion

516: horizontal portion 520: drive cam

540: Drive Cam Gear

600: pressing means 610: cam roller

620: driving cam lever 622: spring

630: drive shaft 640: drive lever

650: necking lever 660: necking roller

670: Link

S10: fixed stage S20: approach stage

S30: Pressing step S40: Finishing step

n: neck

Claims (7)

In the device for necking the edge of the rectangular can end, A fixed shaft 100 which is lifted by external power; A clamping means (200) coupled to the fixed shaft (100) and inserted into the rectangular can and extending outward to fix an end of the rectangular can; A guide means 300 coupled to the fixed shaft 100 at an upper portion of the clamping means 200 and having a guide groove 310 formed on a lower surface thereof to form a quadrature trajectory along an edge to correspond to a rectangular can border; A rotating means 400 which is guided by the guide means 300 and rotates about the fixed shaft 100; A circular cam means 500 which rotates at a different speed from the rotation means 400 around the fixed shaft 100 at an outer side of the rotation means 400 and has a protrusion 510 formed at an edge thereof; The upper part is moved by the speed difference between the rotating means 400 and the cam means 500 in contact with the cam means 500, and the lower part is hinged to the lower side of the rotating means 400 to form a rectangular can. Square can necking device, characterized in that consisting of; pressing means (600) for pressing the square can border inward while moving along the edge. The method of claim 1, The clamping means 200, Expansion cone 220 which is driven up and down in the fixed shaft 100, the sliding key 240 is slid in all directions by the rising of the expansion cone 220 and the square by the pressing of the sliding key 240 Square can necking device, characterized in that made of an expansion mold 260, which extends toward the vertex side of the can and has an inclined neck (n) formed on an outer surface thereof. The method of claim 1, The rotating means 400, A guide roller 420 inserted into the guide groove 310 and moving along the guide groove 310, a rotation lever 440 rotatably coupled to the guide roller 420, and forms a circular plate shape The head 460 is rotatably coupled around the fixed shaft 100 and has a head 460 to which the rotary lever 440 is rotatably coupled, and a head gear 480 to rotate the head 460. Rectangular can necking device. The method of claim 1, The cam means 500, Drive cam 520 and the drive cam 520 formed in the shape of a circular plate and rotatably coupled around the fixed shaft 100 on the outside of the rotating means 400 and protruding at the edge portion 510, Rectangular can necking device, characterized in that consisting of a drive cam gear (540) for rotating. The method of claim 4, wherein The protrusion 510 is, A first inclined portion 512 having an inclination, a second inclined portion 514 having a smaller inclination than the first inclined portion 512, and a horizontal portion formed horizontally adjacent to the second inclined portion 514 Square can necking device, characterized in that consisting of (516). The method of claim 1, The pressing means 600, Cam roller 610 in contact with the cam means 500, the drive cam lever 620 is rotatably coupled to the cam roller 610 on one side and elastically supported inward, and the top of the drive cam lever ( A driving shaft 630 coupled to the other side of the 620, a driving lever 640 coupled to the lower end of the driving shaft 630, and one side is coupled to the driving lever 620 and the center of the rotating means 400 A necking lever 650 hinged to a lower portion and the necking lever 650 are rotatably coupled to the other side and move along a rectangular can frame fixed by the clamping means 200 to press the rectangular can frame inward. Square can necking device, characterized in that consisting of a necking roller (660). In the method of necking the edge of the square can, A fixing step (S10) of fixing the rectangular can by the clamping means 200 inserted into the rectangular can and extending outward to fix the rectangular can end; An access step (S20) of the pressing means (600) rotating along the outside of the edge of the rectangular can fixed in the fixing step (S10) to approach the edge of the rectangular can; Pressing step (S30) for performing the necking by gradually pressing inward while the pressing means (600) approached in the access step (S20) is in contact with the rectangular can rim; The finishing means (S40) for finishing the necking of the rectangular can border only while rotating the pressing means 600 to gradually pressurize the rectangular can frame in the pressing step (S30); Can necking method.

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