JPS62292228A - Frame protruding method for square can drum - Google Patents

Abstract

PURPOSE:To easily execute working, to raise the accuracy, and to prevent a deformation caused after can manufacturing a can, by holding vertically a square can drum, fitting and installing the square can drum to an inner die, and also, allowing an outer die to abut on the outer wall of the can drum, moving the inner die to the outer die side, and executing the frame protruding working. CONSTITUTION:A can drum plate 1 is rounded to a cylindrical shape and its end edges are welded, a cylindrical round can drum 2 is formed, this round can drum 2 is placed on a lift 5 and made to ascend as indicated with an arrow 8, and fitted and installed to a square die 3, by which a square can drum 4 is formed. Subsequently, the square can drum 4 is placed on a lift 7 and made to ascend as indicated with an arrow 9, fitted and installed to an inner die 6, and also, an outer die 10 is placed. Next, the inner die 6 is moved to the outer die 10 side and pressed, by which a frame protrusion is executed to the can drum 4. The frame protrusion in this case is stretched to the outside, based on the present position of the can drum plate as a reference, therefore, a distortion at the time of working is absorbed by stretching the material.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) This invention relates to a method for framing in the production of metal cans, and is ) Conventionally, metal cans are formed into rear-shaped cans by pressing the can body plate and forming a frame.

(Problems to be Solved by the Invention) Recently, research has been conducted to manufacture metal horns by forming a can with a round tip, transforming it into a rectangular shape, and then fixing the upper and lower end plates. ing. In such cases, it is necessary to perform frequent extraction after forming the can body, but when forming the frame by sandwiching the can body between the inner and outer molds and moving the outer mold toward the inner mold, There was a risk that the drawing process would cause distortion and cause deformation after can manufacturing.

(Means for Solving the Problems) However, in this invention, the square can body is held vertically, the square can body is fitted into the inner mold, and the outer mold is brought into contact with the outer wall of the can body,
By moving the inner mold toward the outer mold side, the can body wall was pressurized and a predetermined deformation process was performed, so that the can body plate was extended and strain was absorbed. Therefore, there is no risk of deformation after canning. In addition, since the can body is held vertically and processed, the can body only needs to be moved up and down in a known manner repeatedly, making the process easy and highly accurate.

(Operation of the invention) That is, according to the present invention, the can body wall is sandwiched between the inner and outer molds, and the inner mold is moved to frame the can body wall by press stretch molding, so that the can body wall can be easily molded without causing distortion. .

(Example) As shown in the first figure, the present invention involves rolling a can body plate 1 into a cylindrical shape, welding the edges thereof to form a cylindrical round can 112, and lifting this round can W42. 5 and ascends as shown by arrow 8, and is fitted into the square mold 3 to form a rectangular can body 4. Next, the rectangular corner piece 114 is placed on the lift 7 and raised as shown by the arrow 9, and is fitted into the inner mold 6, and the outer mold 10 is placed therein. Next, the inner mold 6 is moved toward the outer mold 10 side as shown by the arrow 11 by a known method (for example, moving the inner mold in all directions by inserting a horizontal piece) and pressurized. Make a delivery. At this time, the amount is determined based on the current position of the can body plate.
Since it is stretched outward, the strain during processing is absorbed by the stretching of the material.

(Effects of the Invention) According to the present invention, since the can body is held vertically, fitting into the inner mold and arranging the outer mold are extremely easy, and high-speed can making is possible. In addition, when forming frames, the inner mold is moved to the outer mold side with the outer mold as a reference for pressure stretching, so there is no processing distortion when forming the frame on the can body, so the product is deformed. There is no risk of it happening.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the order of can manufacturing in the implementation of this invention, Fig. 2 is a plan view showing the inner and outer molds arranged inside and outside the square can body, and Fig. 3 is the same, with the inner mold on the outer mold side. FIG.

Claims (1)

[Claims] 1. While holding the square can body vertically, fit the square can body into the inner mold, abut the outer mold against the outer wall of the can body, and move the inner mold toward the outer mold side, so that the can body wall A method for shaping a square can body, which is characterized by pressurizing and shaping a square can body to a predetermined shape.