Browse Prior Art Database

Staking Bit With Anti-Flush Mechanism

IP.com Disclosure Number: IPCOM000119900D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 30K

Publishing Venue

IBM

Related People

Kitahori, H: AUTHOR [+3]

Abstract

Disclosed is a hot staking bit, which is used to fasten plastic parts, having a mechanism to prevent the production of flush or burr.

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Staking Bit With Anti-Flush Mechanism

      Disclosed is a hot staking bit, which is used to fasten
plastic parts, having a mechanism to prevent the production of flush
or burr.

      Fig. 1 shows the components of this hot staking bit. They are
body 1, slider 2 and spring 3.

      Fig.2 shows the state of the bit in the hot staking operation.
Plastic parts A and B are to be fastened. First, the body 1 is heated
to a certain temperature, and then it is pressed down to a boss of
part A.  At this moment the slider 2 covers the boss, and it is
pressed harder as the body 1 moves lower because of the function of
the spring.  Thus, during the hot staking process the inside wall of
the slider 2 guides the melting plastic boss to the gap between parts
A and B smoothly.

      As a result, the staking portion shows a beautiful finishing
surface without any flush or burr.