Ykk Corporation

Hiroo Minami

Susumu Komuro

Kenji Yuki

Koji Muratsubaki

A metal mold for molding a slider of a slide fastener is provided. The metal mold comprises upper and lower mold cavities for molding portions of the slider, with the upper and lower molds moving up and down relative to each other in order to open and close the mold. The mold further comprises at least two sliding molds for molding portions of the slider not molded by the upper and lower molds. The sliding molds are capable of being removably introduced into the upper and lower molds from their front and rear sides when the upper and lower molds are in tight contact with each other.

Metal mold for manufacturing a slider for a slide fastener

A slider for a slide fastener with an automatic locking mechanism comprises a small number of components and hence can be assembled and operated with ease. A slider body of the slider has a receiving hole for receiving a resilient plate running in parallel with a guide groove and arranged in the upper wing plate of the slider body. The receiving hole has an enlarged open section arranged at the side of a rear opening and communicating with the guide groove to a claw receiving hole, and is formed to have a narrow tubular shape above a guide post. A wide groove is arranged along a lateral side of the receiving hole with a gap therebetween. A through hole is arranged to perpendicularly cross the receiving hole at the middle thereof. The resilient plate is introduced into the receiving hole from the U-shaped spring side for mutual engagement and the actuating portion of the operating member is introduced into the through hole until the cam surface resiliently abuts the actuated portion of the resilient plate and the spring plates extending from the operating portion exposed from the upper wing plate are arranged in the wide groove so that the operating member is held in place and resiliently movable back and forth. As the operating portion is operated, the cam surface raises the resilient plate and hence the locking claw to allow the slider to slide.

Slider for slide fastener with automatic locking mechanism

A slider of a slide fastener is free from any damage that may arise when a lug is deformed and springs back and an upper wing is protected against undesired deformation. A pair of rear lateral legs project downward from the lug. A gap is defined between the rear lateral legs and the upper wing. One or more longitudinal ribs are formed on the lower surface of the lug. If excessively pinching force is applied to the lug to close the gap, the upper wing is kept free from any local deformation because the rear lateral legs absorb the excessive force. Also, if the lug springs back, because the rear lateral legs restore their original positions, they are held in close contact with the upper wing.

Growing community of inventors

Toyama-ken, Japan

Hiroo Minami