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Zipper head and casting die for compression casting same

A technology of die-casting molds and zippers, which is applied in the field of zipper pulls, and can solve problems such as cracking of the base, ugly appearance of the puller body, and damage

Inactive Publication Date: 2004-02-25
YKK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the conventional pull tab described above, when the upper surface of the tab lug is pressed to plastically deform the base after the tab is attached to the tab lug, a large pressure is required so that the base will crack or damaged
In addition, the pull tab body inevitably has a parting line in the longitudinal center region of the pull tab including the tab tie lugs, thus making the entire pull tab body unsightly in appearance
[0005] According to the above-mentioned traditional die-casting mold, since the upper mold and the lower mold for casting the pull-tab body are side-parted in opposite directions, so along the longitudinal direction, in the center of the pull-tab body itself and the center of the pull-tab lug and along the There are parting lines on the pull tab body and tab tie ears, which makes the appearance of the entire pull tab ugly
In addition, it is difficult to manufacture pull tabs that can be plastically deformed by simply applying pressure when using conventional molds.

Method used

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  • Zipper head and casting die for compression casting same
  • Zipper head and casting die for compression casting same
  • Zipper head and casting die for compression casting same

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Embodiment Construction

[0039] The principles of the invention are useful when applying the invention to die-cast zipper pullers and molds for die-cast zipper pullers. Several preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] Such as Figure 1-Figure 3 As shown, in the zipper puller in which the handle 17 is fixed on the puller body 1 after casting the puller body 1, the puller body 1 is made of metal such as aluminum alloy or zinc alloy by die-casting and it It is composed of an upper fin 2 and a lower fin 3 connected by a guide post 4 at its front end 10, and a cantilevered pull tab tie ear 5 that is inverted L-shaped stands on the upper surface of the upper fin 2 and is drawn from the upper surface of the upper fin 2. The upper surface of the guide post 4 protrudes from the end 11 of the upward fin 2 .

[0041] The upper and lower fins 2,3 have a pair of downwardly curved upper guide flanges 7,7 and a pair of upwa...

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Abstract

In a die-casting slide fastener slider having a plastically deformable, cantilevered pull-tab attaching lug (5) on a slider body (1), the lug (5) projects from an upper end of a guide post (4) over an upper wing (2) toward a rear end (11) of the upper wing (2) and terminates in a downward end projection (14) spaced from the upper wing (2) by a gap (15) through which an attachment ring (18) of a pull tab (17) is threaded. The lug (5) has a longitudinal hollow (12) through its base to facilitate plastically deforming the lug (5) to reduce the size of the gap (15) after threading. In this structure, since first and second slide cores (22, 23) of a mold for die-casting the slide fastener slider can be inserted from the front and rear sides, it is possible to mold the lug (5) without generating any parting line on its overall appearance.

Description

technical field [0001] The invention relates to a cantilevered pull-tab lug die-casted on the pull-tab body by die-casting using metal and then screwing the connecting ring of the pull-tab to the pull-tab lug from its free end and finally tightening it by applying pressure. A zipper tab made by plastically deforming the lugs of the tab. The invention also relates to a mold for die-casting such a zipper pull. Background technique [0002] In the above-mentioned zipper puller, the usual practice is to leave a gap between the end or the free end and the upper wing to set a cantilevered pull tab tie ear at the front end of the upper wing of the puller body; Screw the connecting ring of the pull-tab to the lug of the pull-tab through the above-mentioned gap, and finally make the pull-tab tie ear plastically deform by applying pressure to narrow the gap, so as to prevent the fixed pull-tab from being accidentally disengaged. [0003] Japanese Utility Model Application No. Ping 2...

Claims

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Application Information

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IPC IPC(8): A44B19/26
CPCY10S425/058A44B19/26Y10T24/26Y10T24/2568Y10T24/2586A44B19/42
Inventor 若林政男
Owner YKK CORP
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