FIELD OF THE INVENTION
5
This invention relates to cutting tools for manufacturing. More specifically, it
relates to a dinking tool, which may be used for producing fiber glass sheet based thin
gaskets.
10
BACKGROUND OF THE INVENTION
Conventional methods of milling and drilling were 15 not very effective for fiber-glass
material and very time consuming. Hence, a new tool was required to speed up the
process.
An object of this invention is the provision of a new and improved cutting tool
20 which is rigid, compact and capable of producing smooth cutting edges at the time of
manufacturing of gasket.
25 SUMMARY OF PRESENT INVENTION
In accordance with one aspect of present invention is to provide a tool that
reduces the manufacturing time of a gasket.
30
In accordance with the second aspect of present invention is to provide a tool
that requires few mechanical parts.
In accordance with yet another aspect of present invention is to provide a tool
35 that can be used repeatedly with minimum amount of wear & tear.
In accordance with yet another aspect of present invention is to provide a tool
that can be used for various different types of sheet jobs with minimum changes in
design allowing for greater versatility.
40
Annexure‐II
In accordance with yet another aspect of present invention is to provide a tool
that can be properly and effectively utilized by lesser skilled individuals.
5
BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the present invention 10 n will become more apparent
and descriptive in the description when considered together with figures presented:
Fig. 1 is a top view of the shaping tool
15 Fig. 2 is a sectional view of the shaping tool with shank
DETAILED DESCRIPTION
20
Referring to fig.1 & 2, present invention is a cutting tool used to produce thin
sheet based fiber-glass gaskets.
25 The shank 3 is of relatively low hardness steel and can be used for various tool
heads of different sizes. Shank 3 is connected to the tool head by means of a threadjoint.
Hence it becomes easier to detach and replace. The shank is made up of
relatively inexpensive metal.
30 The punch 2 is a metal pin 2 made of hard carbon steel with HRC 50~55 and has
sharpened edges capable of piercing a hole 5 of same diameter as the pin 2 in one
single strike. Angle of cutting edge is 60 degrees which results in perfectly punched
holes 5 without burr.
35 Dinking tool 3 is made of hard carbon steel with HRC 50~55 and has sharp
cutting edges inclined at 60 degrees. It can be used as a general cutting tool for various
types of jobs such as gaskets, covers, washers etc. Both the cutting edges need to be
aligned at the same horizontal level to ensure a cut of through depth. Also, angle of
inclination other than 60 degree will lead to a blunt cutting edge and unequal cut in
40 thickness.
Annexure‐II
The tool head has been designed in such a way that it is capable of giving radius
4 and two holes 5 to the finished part during the cutting process itself. The tool head is
shaped like the outer profile of the gasket.
5
Also, the tool head has a rubber attachment 6. When the job is pushed inside the
tool, the rubber 6 compresses to compensate the thickness of the job and facilitates
removal of the work piece from the cavity. Upon removal of pressure, the job is
automatically pushed out when rubber 6 expands.
10
Hence, the job retrieval process becomes easier and job is not damaged by use
of sharp-edged removal tools.

WE CLAIMS:-
Accordingly, the description of the present invention is to be considered as illustrative only and is for the purpose of teaching those skilled in the art of the best mode of carrying out the invention. The details may be varied substantially without departing from the spirit of the invention, and exclusive use of all modifications which are within the scope of the appended claims is reserved. We Claim

1. A cutting tool has been developed for easy manufacturing of gasket from fiber-glass sheet material. The cutting tool comprising:

- A shank of relatively low hardness steel, supporting the tool head by means of a thread-fit arrangement. This provides easy holding attachment for dinking operation.

2. The Dinking tool of claim 1 wherein Tool head for dinking and punching operation.

3. The Dinking tool of claim 1 wherein, tool have a tool head attachment that has a hole with a thread on internal diameter to be screwed on the shank .

4. The tool head of claim 2 wherein, cutting edges have angle inclination of 60 degrees with respect to each other.

5. The tool head of claim 2 wherein, the punching pins also have inwards cutting edges of 60 degrees inclination. These pins produce smooth holes without rough edges maintaining all geometrical parameters.

6. The tool head of claim 2 wherein, hard rubber attachment is provided to facilitate easy removal of cut out job from the tool head. The expansion of rubber automatically pushes out the job after removal of applied force.

7. The Dinking tool of claim 1 has a radius R4 on the cutting edge corners in accordance with the outer profile of the gasket to be produced. ,TagSPECI:As per Annexure-II