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Ultrasonic welding device and manufacturing method of disposable diaper using the same
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An ultrasonic and welding technology, applied in the field of ultrasonic welding devices, can solve problems such as complex drive control and needs, and achieve the effect of simplifying control and structure
Active Publication Date: 2017-09-26
ZUIKO CORP
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Abstract
Description
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Problems solved by technology
Therefore, the cylinder 105 and a structure for applying power to the cylinder are required, resulting in an increase in the size of the ultrasonic welding apparatus.
Also, in order to bring the anvil roll 101 close to or away from the ultrasonic horn 100 in coordination with the movement between the welding range and the non-welding range, complex drive control of the cylinder 105 is required.
Method used
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no. 1 approach ＞
[0061] Below, refer to figure 2 The ultrasonic welding device 1 according to the first embodiment for performing the welding step P5 will be described.
[0062] The ultrasonic welding device 1 includes: an introduction roller 2 for introducing the sheet W folded in half in the half-folding process P4; a welding drum 3 for welding the sheet W introduced by the introduction roller 2; and a lead-out roller for leading out the sheet W welded by the welding drum 3 4.
[0063] The welding drum 3 is equipped with: a sheet holding drum (holding member) 5 for holding the sheet W introduced by the introduction roller 2; Six anvil blocks 7 that carry out ultrasonic welding to the sheet W between each ultrasonic horn 6; hold the cylindrical anvil block holding drum 8 of each anvil block 7 (refer to image 3 ); and the cam drum 9 (refer to image 3 ); and adjacent to each ultrasonic horn 6 and fixed on 6 pressed members 18 of the sheet holding drum 5 (refer to image 3 ).
[0064] re...
no. 1 approach
[0118] According to the first embodiment, the anvil roller 10 in the non-welding ranges E2, E4 can be pressed with the supported surface 10c (the area between the protrusions 10b) that does not contribute to the welding of the sheet W in the anvil roller 10. Part 18 snaps into place.
[0119]According to the first embodiment, the non-welding ranges E2 and E4 can be set at two places across the welding range E3. Therefore, by reciprocating the anvil roll 10 between the two non-welding ranges E2 and E4, the sheet W can be reliably welded while preventing wear and deterioration of the anvil roll 10 and the ultrasonic horn 6 .
[0120] According to the first embodiment, the weight of the portion of the ultrasonic horn 6 on the output surface 6e side of the node portion of ultrasonic vibration can be reduced by the slit 6d, so that the output amplitude can be increased.
[0121] In particular, in the first embodiment, since the slit 6d is formed in the range from the position corr...
no. 2 approach ＞
[0127] In the first embodiment, the guide surfaces 21 a and 23 a are provided on the pressed member 18 , but the guide surfaces may be provided on at least one of the pressed member 18 and the anvil roll 10 .
[0128] In the ultrasonic welding device according to the second embodiment, if Figure 8 As shown, a guide surface (outer peripheral surface of the large-diameter portion 10e) is provided on the anvil roll 10A. In addition, the pressed member 18A according to the second embodiment has a flat surface 18b provided on the same plane as the output surface 6e of the ultrasonic horn 6, and this flat surface 18b serves as a large-diameter portion for letting the anvil roller 10A The outer peripheral surface of 10e is a rolling contact surface.
[0129] The anvil roll 10A has a large-diameter portion 10e protruding from a supported surface 10c between a pair of protruding portions 10b.
[0130] The large-diameter portion 10e is arranged concentrically with the cylindrical por...
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Abstract
The present invention simplifies the structure and control for bringing the ultrasonic horn closer to or away from the anvil. The displacement mechanism has a force applying mechanism and a pressed member (18), wherein the force applying mechanism applies force to the anvil roller (10) so that the anvil roller (10) leans against the ultrasonic horn (6), so that the output surface ( 6e) Approaching the welding surfaces (10d) in their normal direction, the pressed member (18) has a guide surface (21a, 23a) located in the non-welding range (E2, E4) based on the force applied by the force applying mechanism The outer surface of the anvil roller (10) is pressed against the guide surfaces (21a, 23a), and the pressed member (18) is in a state where the pressed surface (21a) is arranged within the range of the width direction of the gap (6d) The bottom is fixed to the sheet holding roller (5). The guide surface (21a, 23a) of the pressed member (18) corresponds to the movement of the anvil roller (10) from the welding range (E3) to the non-welding range (E2, E4), and the anvil roller (10) is directed toward the output surface (6e ) and the welding surface (10d) are guided in a direction away from each other.
Description
technical field [0001] The present invention relates to an ultrasonic welding device for ultrasonic welding an object to be welded and a method for manufacturing a disposable diaper using the ultrasonic welding device. Background technique [0002] Conventionally, there has been known an ultrasonic welding device that includes an anvil and an ultrasonic horn, and welds the welded object by applying ultrasonic vibrations to the ultrasonic horn while sandwiching the object to be welded between the anvil and the ultrasonic horn. Weld. [0003] As such an ultrasonic welding device, there is known a device provided with a holding member for holding an object to be welded and an anvil roll movable relative to the holding member between a welding range and a non-welding range across the object to be welded, wherein welding The range is a range where the welded object is overlapped with the welded object held on the holding member in plan view and the welded object is welded betwee...
Claims
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Application Information
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