Method for manufacturing a rotary drum for drum washing machines and pressing device used therefor
A drum washing machine, drum technology, applied to other washing machines, manufacturing tools, metal processing equipment, etc., can solve problems such as low bonding strength, damage, and deformation of the joint
Inactive Publication Date: 2007-05-16
SAMSUNG ELECTRONICS CO LTD
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- Abstract
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Problems solved by technology
Therefore, when the bonding portion does not maintain sufficient bonding strength, the bonding portion is deformed or damaged
Therefore, it is difficult to implement conventional mechanical pressing methods on drums suitable for use in high-speed dehydration, resulting in low bonding strength
Method used
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[0023] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.
[0024] 1 is a longitudinal sectional view of a rotary drum obtained using a method of manufacturing a rotary drum of a drum washing machine according to the present invention, and FIG. 2 is a flow chart illustrating the method of manufacturing a rotary drum according to the present invention.
[0025] As shown in FIG. 1 , a rotary drum 1 obtained using the method of the present invention includes a cylindrical portion 10 and front and rear portions 20 , 30 connected to front and rear ends of the cylindrical portion 10 . The cylindrical part 10, the front part 20 and the rear part 20 are molded separately and then joined by a seaming step. Reference numerals 2 and 3 in...
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Abstract
A method for manufacturing a rotary drum for a drum washing machine, in which the strength of a bonding part of the rotary drum is improved so that the bonding part is not deformed even when the rotary drum is rotated at a high speed, and a pressing device used therefor. The method includes bending one circumferential end of the processed material in a U shape to form a first overlapping part and a first bending part, and bending the other circumferential end of the processed material in a U shape to form a second overlapping part and a second bending part; overlapping the first and second overlapping parts with each other to form a connection part; and pressing the connection part so that the original shapes of the first and second bending parts are maintained and the first and second overlapping parts are adhered to each other to form a bonding part. The pressing of the connection part is achieved by a press die including upper and lower dies respectively having a plurality of first and second protrusions disposed in the forward and backward direction of the connection part and having designated spaces between lower ends of the first protrusions and the lower die and / or between upper ends of the second protrusions and the upper die when the upper and lower dies contact each other.
Description
technical field [0001] The present invention relates to a method of manufacturing a rotary drum for a drum washing machine, and more particularly to a manufacturing method in which the strength at a joint of the drum is increased so that the joint is not deformed even when the drum rotates at a high speed. A method of rotating a drum of a drum washing machine, and a pressing device used therefor. Background technique [0002] In general, washing machines using electric laundry are classified into vertical drum washing machines in which a washing tub is vertically installed in a main body, and drum washing machines in which a washing tub is horizontally installed in a main body. The drum washing machine vertically moves laundry along with washing water along an inner circumference of a vertically installed washing tub (ie, a drum) through alternate rotation of the drum in clockwise and counterclockwise directions, thereby washing the laundry. [0003] Generally, a rotary dru...
Claims
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IPC IPC(8): B21D51/16B21D37/10
CPCD06F37/02Y10T29/49908B21D35/00B21D51/16D06F37/04
Inventor 金义洙金炯均
Owner SAMSUNG ELECTRONICS CO LTD