KR100848648B1 - Forming tool of embossed can body - Google Patents

Abstract

The present invention relates to an embossed can body molding tool for embossing a pattern, letter or logo of any shape on a two or three piece can body, wherein the molding tool 10 of the present invention is a two or three piece can 14. An outer mold 11 having a space to be inserted therein and having a desired shape engraved in the intaglio 12 on the inner surface thereof, an elastic punch 13 having a cylindrical cylindrical shape inserted into the can, and an up and down integrally with the elastic punch. It is coupled to the movement and includes a pressure plate 15 for receiving the vertical load of a conventional mechanical or hydraulic press to press the elastic punch. The molding tool of the present invention can emboss an arbitrary shape, letters, etc. on the outer surface of the can body more simply than the mechanically known technology requiring complicated rotation and shanghai conveying system by using the vertical reciprocating motion of a conventional high speed press. It works.

 2-piece can, 3-piece can, embossing, elastic punch

Description

Forming tool of embossed can body}

1 is a conceptual diagram showing an embossing molding process of the can body according to the prior art,

2A and 2B are conceptual views illustrating an embossing molding process using an embossing can body forming tool according to an embodiment of the present invention, and FIG. 2A shows a form before starting molding, and FIG. 2B shows a form after embossing molding is completed. Conceptual diagram shown,

3 is a perspective view of an embossing can molded through the embossing can body forming tool shown in FIG. 2A.

  ♠ Explanation of symbols on the main parts of the drawing ♠

10: molding tool 11: external mold

12: engraving 13: elastic punch

14, 17: can 15: pressure plate

16: vertical load 18: embossed text

The present invention relates to an embossed can body forming tool, and in particular, after completion of the body molding of a conventional two-piece or three-piece can made of stone steel sheet or aluminum sheet, the outer surface of the cylindrical can body may be An embossing can body forming tool for embossing letters or logos for advertisement.

Generally, a can is a container manufactured to contain a liquid liquid and processed food using a metal material, and is divided into a three-piece can and a two-piece can according to the number of components. The three-piece can consists of three parts: the lid, the body, and the bottom, while the two-piece can is integrally formed with the body and the bottom. In general, a three-piece can is produced using a tin plate, which is a kind of low carbon steel sheet, and a two-piece can is manufactured using an aluminum alloy plate or a stone plate. The cans manufactured in this way are cleaned, dried, and painted in accordance with the respective manufacturing processes, and then commercially printed on the outer surface of the can to complete the body of the final can.

Recently, the interest in the development of embossed cans for giving irregularities to the can body has been increasing due to the diversification of the can outer design and the reinforcement of the can body strength due to the thinning of the can. The embossing molding method of the can body can be largely divided into hydraulic or mechanical methods.

The hydraulic method is also commonly referred to as hydroforming, in which a can is to be molded into an outer mold (container) in which a pattern or letter of a certain shape is engraved on the surface, and a fluid pressure is applied to the inner surface of the can. It is a method of transferring the intaglio shape of the outer mold to the can body by embossing.

On the other hand, the mechanical method of forming by the roll forming method transfers the intaglio or embossed shape formed on the surface of each roller to the wall of the can body by the adhesion / pressure of the inner roller inserted into the can and the outer roller installed outside the can. That's how. Among the two methods, a mechanical molding method which is advantageous in terms of productivity or production speed is widely used for commercial production of embossing cans.

Representative known techniques of the embossing method by the mechanical roll forming method include WO 97/21505 (Method of Orienting Cans), WO 98/03279 (Tooling and Method for the Embossing of a Container and the Resulting Container) and Japanese Laid-Open Patent Publication No. 2001-30033 (method of manufacturing an embossed tube).

The known technology by the roll forming method as described above is faster than the hydroforming method, but there is a limit to producing according to the process flow in the actual steel mill, and the initial capital investment cost is excessively required. The current two- or three-piece can commercial production line produces can bodies at a production rate of about 1800 to 2400 pieces per minute, and the roll forming method does not sufficiently digest the production speed of the previous process of manufacturing the bodies. . Therefore, many roll forming machines are required, which requires a lot of equipment investment cost.

1 is a conceptual diagram showing an embossing molding process of the can body according to the prior art. As shown in FIG. 1, the conventional embossing molding apparatus requires a driving system for driving the upper rotating body 1 and the lower rotating body 2 in the respective rotation directions, and the can 7 is upper-rolled. A vertical transfer system for inserting between the whole 1 and the lower rotating body 2 and then contacting again is separately required. In addition, the upper mold (3) and the lower mold (4) is engraved with the intaglio (5) or embossed (6) in accordance with the shape of the character or pattern to be expressed on the body of the can (7).

As outlined above, the conventional embossing molding apparatus requires a high-speed rotation drive system, an up-and-down conveying system, and an embossed or intaglio mold, which requires a large investment, and the upper rotating body 1 and the lower rotating body. Since one rotation of (2) may be completed to form an arbitrary shape in the can body, a molding time per unit can may be required.

Therefore, it is configured to emboss the outer surface of the can body in a simpler manner as compared with the conventional apparatus, and is a simple vertical reciprocating motion of a high speed press driven by a conventional mechanical or hydraulic type without a separate rotary driving device as a conventional apparatus. An object of the present invention is to provide an embossing can body forming tool capable of performing high-speed embossing molding by utilizing a function of.

The molding tool of the present invention for achieving the above object has an outer mold having a space in which a two-piece or three-piece can can be inserted and a desired shape engraved on the inner surface thereof, and a cylindrical cylinder inserted into the can. It is characterized in that it comprises an elastic punch of the shape, and a pressing plate which is coupled to move up and down integrally with the elastic punch and presses the elastic punch by receiving a vertical load of a conventional mechanical or hydraulic press.

In the following, with reference to the accompanying drawings a preferred embodiment of the embossed can body forming tool according to the present invention will be described in detail.

2A and 2B are conceptual views illustrating an embossing molding process using an embossing can body forming tool according to an embodiment of the present invention, and FIG. 2A illustrates a form before starting molding.

As shown in Figure 2a, the molding tool 10 of the present invention has a space in which a two-piece or three-piece can 14 can be inserted and the outer mold having the desired shape engraved in the intaglio 12 on the inner surface ( Container) (11). An elastic punch 13 having a cylindrical shape is inserted into the can 14, and the elastic punch 13 is accommodated in the upper portion of the elastic punch 13 by receiving a vertical load 16 of a conventional mechanical or hydraulic press. A pressurizing plate 15 capable of pressurizing is provided. At this time, the elastic punch 13 and the pressure plate 15 is configured to move up and down integrally by fastening bolts and the like.

Referring to the configuration and the required characteristics of the molding tool 10 of the present invention in more detail as follows. The material of the outer mold 11, in which the desired shape is formed in advance of the intaglio 12, is sufficient as about the heat treated general carbon steel, but it is preferable to use a tool steel in order to secure wear resistance in long-term use. In addition, the inner diameter of the outer mold 11 needs to be slightly larger than the outer diameter of the can 14, in order to allow the can 14 to be easily mounted inside the outer mold 11 during continuous operation. To this end, the inner diameter of the outer mold 11 is preferably about 0.5 to 1 mm larger than the outer diameter of the can 14. For the same reason, the outer diameter of the pressing plate 15 is preferably 0.5 to 1 mm smaller than the inner diameter of the can 14.                     

The elastic punch 13, which is the core and most important role of the present invention, should have a characteristic that can be easily deformed by receiving the vertical load 16 of the pressure plate 15, but again when the vertical load 16 is removed. It must have sufficient elasticity to recover to its initial shape. Therefore, the material of the elastic punch 13 may be used, such as rubber or polyurethane having an elastic modulus of 200 ~ 500kgf / mm, a polyurethane material is excellent in durability and wear resistance in long-term use.

The pressure plate 15 and the elastic punch 13 are formed to move together by fastening bolts, etc., but the outer diameter of the elastic punch 13 should be smaller than the outer diameter of the pressure plate 15. The reason is that the elastic punch 13 is reduced in length when pressurized by the vertical load 16 and at the same time the outer diameter is expanded. Therefore, it is preferable to set the outer diameter of the elastic punch 13 to 1 to 2 mm smaller than the outer diameter of the pressure plate 15.

Figure 2b is a view showing a state in which embossing is completed through the embossing can body forming tool according to the present invention.

As shown in FIG. 2B, when the pressing plate 15 is pressed by the vertical load 16 of the conventional press, the elastic punch 13 is deformed so that its outer diameter expands like the shape of the barrel. Then, a portion of the elastic punch 13 whose diameter is expanded is filled in the intaglio 12 portion of the outer mold 11 to form a predetermined shape in the body of the can 14.

As described above, the molding tool 10 of the present invention simply presses an elastic punch using a vertical reciprocating function of a normal high-speed press to form a predetermined shape on the body of the can 14, as in the prior art. Compared to the conventional mechanical molding apparatus that rotates the can one time to form one embossing can, the concept and configuration thereof are simple, and high-speed embossing can be performed even at a low investment cost.

Below, an example of the embossing can shape | molded using the shaping | molding tool of this invention comprised as mentioned above is demonstrated.

3 is a perspective view of an embossing can molded through the embossing can body forming tool shown in FIG. 2A. The can 17 applied in this experiment is a can of standard nominal size 211x413 with an outer diameter of 66.02 mm and its capacity is 355 ml. Prior to embossing, the can body was manufactured by a conventional two-piece can manufacturing process, and the material used was stone steel. In this experiment, the inner diameter of the outer mold 11 of Figure 2a was set to 66.10mm and the material is tool steel SKD11.

In addition, the material of the elastic punch (13 in Fig. 2a) applied in this experiment is polyurethane, the elastic modulus is 410kgf / mm, the outer diameter is 65.82mm, the outer diameter of the pressure plate (15 in Fig. 2a) is 65.95mm Was set. In this experiment, the pressurized feed distance of the press plate (15 of FIG. 2A) at the time of molding completion was 3.8 mm, and the maximum load at that time took about 1.5 tons. Through the above experiment, the can body was molded into the embossed letter 18 as shown in FIG. 3.

As described in detail above, the embossing can body forming tool of the present invention uses an up and down reciprocating motion of a conventional high-speed press, and more simply has an arbitrary shape on the outer surface of the can body, compared with a mechanically known technique requiring a complicated rotation and shanghai conveying system. There is an effect that can emboss letters and the like.

The technical details of the embossing can body forming tool of the present invention have been described above with the accompanying drawings, but this is only illustrative of the best embodiment of the present invention and is not intended to limit the present invention.

In addition, it is obvious that any person skilled in the art can make various modifications and imitations within the scope of the appended claims without departing from the scope of the technical idea of the present invention.

Claims (3)

An embossing can body forming tool for embossing a pattern, letter or logo of any shape on a two or three piece can body, An outer mold having a space in which the two- or three-piece can can be inserted and engraved with a desired shape on an inner surface thereof, an elastic punch having a cylindrical cylindrical shape inserted into the can, and integrally with the elastic punch It is coupled to move up and down and includes a pressure plate for receiving the vertical load of a conventional mechanical or hydraulic press to press the elastic punch, The elastic punch is embossed can body forming tool, characterized in that the elastic modulus is made of a polyurethane material of 200 ~ 500kgf / mm, the outer diameter of the elastic punch is configured to 1 ~ 2mm smaller than the outer diameter of the pressing plate. delete The embossing can body forming tool according to claim 1, wherein an inner diameter of the outer mold is 0.5 to 1 mm smaller than an outer diameter of the can, and an outer diameter of the pressing plate is 0.5 to 1 mm smaller than an inner diameter of the can. .

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