At the injection molding, the charactaristic shapes enables the hook to be forced extraction. No matter how small or narrow, it is able to be molded. It is ‘the third connecting tool’ next to Velcro (hook and loop fastener) and the magnet. And this technology is contributable to development of new products, quality improvement, improvement of technical ability and product development ability, improvement of high-cost structure, increasing customer satisfaction, increasing profitability, and energy-saving measures (contributing to SDGs).
Reference data
Materials
PMMA
(acrylic )
ABS
PC(Polycarbonate)
PP
K1-HOOK
200
1250
3400
Tens of thousands of times
Conventional product
0
79
545
It was worn down and happened whitening in the middle of test.
Above figures are the number of times until it’s broken by safety factor: 1.
Unbreacalbe hook.Basic shape of ‘K1-HOOK’
Reception-side also can be forcibly extracted.Application range is infinite.
It can produce various most type of resins.
It can produce a round and a rectangle.
Significant cost reduction. Application to hinge.
Forced extraction experiment
無理抜き部の破断画像
We designed a coupling (pipe joint) using the “K1-HOOK” to demonstrate that the patented shape can be “forced extract” in the injection molding process.
We made a mold for demonstration.(See fractured surface.) As shown in the video, it can attach and detach many times with no damage on the hook.
It can be easily removed by gently folding and pulling away after shifting the lock ring.
The product has been built to meet a level where it can be used as a product under water supply pressure.
The inner diameter can be any size from a few millimeters to meter class.
The shape is not limited to a circle. It can be square or oval.「It can be applied not only to “fluid” couplings, but also to a bar-type attachment/removal, string or rope attachment/removal, and odd-shaped ducts.
The coupling in the video is designed with a safety factor of 1.5 or higher at the HOOK.When frequent connection and disconnection is not required but “connection strength” is important, a strong connection can be made by designing with a safety factor of 1 or less.
However, the service life will be lower. If the durability test results are within the range of life expectancy required for the product, it can be used without problems.
Assembly without screws
Because screwing can be skipped while in assembly, cost and energy can be reduced greatly.
Application to detachable parts and safety devices
For doors, revolving doors, or preventing flying out from drawers. Application to safety devices that are disengaged when a certain load is applied from the holding state and can be immediately reset.
TSUBAKIMOTO KOGYO CO., LTD.
NAGOYA MATERIALS SECTION, WESTERN JAPAN SALES DEPARTMENT, INDUSTRIAL MATERIALS BUSINESS SECTION
Concatct Person: Kosuke Kondo
NAGOYA LUCENT TOWER 17F, 6-1, Ushijima-cho, Nishi-ku, Nagoya, 451-017, Japan
Tel: +81-52-562-2310 Fax: +81-52-562-2245
E-mail: kosuke.kondo@tsubaki.co.jp
We manufacture and assemble the parts with this patent.
Engineer
Akusesu Co., Ltd.
Contact Person: Katsuzo Kamata
Ryu-na Design and Engineering
PIC: Seiichi Nishikawa
