FIELD OF THE INVENTION
This invention is related to proper tinning of the wires of the fine wired PCBs.
BACKGROUND OF THE INVENTION
Tinning of the wires in fine wired PCBs is the important aspect of the soldering of
1000 wires on the track of PCBs. In initial phase of our production of electronics units,
Manual Tinning of approx. 1000 wires on the PCBs of type Input & output, Processors
PCBs is done. This manual tinning is very tedious and time consuming jobs and quality &
accuracy of the tinning is also not proper.
For the tinning of approx.1000 wires on PCBs, present invention is a Universal tinning tool
for tinning that is used for the tinning of the approx.1000 wires at a time for different types
of PCBs.
SUMMARY OF PRESENT INVENTION
Present invention is concerned with the tinning of wires in the assembly of fine
wired PCBs. These PCBs are used in the different Electronic industry.
In accordance with one aspect of the present invention is to provide proper tool for
the tinning of wires.
Main objective of this tool is to provide the smooth, proper and fast tinning of
approx. 1000 wires in the PCBs.
Briefly, the present Invention is small, lightweight and easy to use.
Annexure‐II
BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the present invention will become more apparent
and descriptive in the description when considered together with figures/flow charts
presented:
Fig. 1 is a Top View of the universal tinning tools.
Fig. 2 is a Front View of the universal tinning tools.
Fig. 3 Shows methodology of tinning fine wired PCBs.
DETAILED DESCRIPTION
Tinning provides an improvement in the operating temperature range, water
resistance and mechanical strength of bare copper wire. In addition, tinning is considered
a soldering aid. Tinning copper wire imparts desirable characteristics to bare copper wire:
• Soldering improvement
• Operating temperature range improvement
• Water and general corrosion resistance
• Good crimp termination capability
• Affordability
A brief description of the set up and the procedure for tinning on the Universal tinning tool
is as detailed below:
I) Referring figure 1, 2 & 3, the present invention is a tinning facility for tinning fine
wires of a fine wired PCB. The Universal Tinning Tool can be adjusted for
different sizes of fine wired PCBs. The complete working of tool is explained
through three figures namely figure 1 the top view of the tool, figure 2 front view
of the tool and figure 3 explains the methodology.
II) Figure 1 has different parts namely, Pillar – 1 which is the main stand with
spring - 2 and hand nut - 4 for adjusting the height of the stand. The stand has a
locator - 3 with the PCB holding guide. Knurled screw - 5 holds the PCB in its
Annexure‐II
position. Hex Nut – 12 and Allen screw -9 are used for adjusting the distance
between PCB holding guides for different sizes of PCBs.
III) Figure 2 has Dowel – 10 and Allen screw – 11 for fixing the Guide holder – 8 to
the locator (shown in fig 1). Right guide -7 and Left guide – 6 are attached to the
guide holder and are adjustable as per required dimension of the PCB.
IV) Figure 3 describes the methodology for tinning the fine wires of the fine wired
PCB. Before laying the fine wires on the bare PCB, a trace paper or a butter
paper is attached to the bare PCB on the side where tinning of wires is to be
done and is fixed at the edges. For laying the fine wires, a piercing tool is used
which has a hollow needle attached at it’s end. Wires are first wound on the
piercing tool and are inserted through the needle. Then, the wires are laid on the
bare PCB with the help of this piercing tool. While laying the wires, it is ensured
that the wire is brought out through the PCB and the trace paper. The length of
wire coming out of the paper must be around 3 mm for tinning and soldering on
the PCB,
V) Now after laying all the wires as per designed wiring chart, the PCB is
positioned on the Universal Tinning Tool. The distance between left and right
guides are adjusted with the help of allen screw 9 and hex nut 12 as shown in
figure 1. Next, the PCB is fitted on the main stand between the left guide 6 and
right guide 7 and tightened with the help of knurled screw 5 fitted at the four
ends of the left and right guide. Solder (60: 40) is filled in the tinning pot and
temperature is set around 340 °C for melting the solder and sufficient enough to
remove the insulation of the fine wires. Tinning pot is switched on to liquefy the
solder. When the temperature is attained in the tinning pot, the PCB along with
the stand is placed near the tinning pot with the PCB adjusted so that the whole
PCB is exactly above the tinning pot. Then slowly with the help of hand nut 4
PCB is lowered towards the tinning pot. When all the wires are submersed in the
tinning pot, the whole set up is left for 3-4 sec and the PCB is moved upwards
with the help of hand nut. Here special care is to be taken that the wire are not
left for longer time as this may damage the wires. Trace / butter paper does not
allow the solder to come in direct contact with the PCB as it may harm the PCB.
Further after tinning the butter paper is removed slowly and carefully, thereafter
Annexure‐II
the wires are soldered on their specified positions. This method thus saves the
personnel from holding each wire with a tweezers and tinning each wire
separately as all the wires are tinned at one go.
VI) The advantages of designed tool are :-
􀂾 The same setup can be used for different types of PCBs.
􀂾 Tinning with this setup consumes around 90% lesser time than manual
tinning.
􀂾 Tinning is uniform though all the wires.
􀂾 Quality of tinning improves.
􀂾 This method is less hazardous than manual tinning.
􀂾 It is a much easier way of tinning exerts much less stress than manual
tinning.

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 Universal tinning tool, comprising
- A pillar acting as a stand,
- Spring attached to pillar
- Hand nut for height adjustment,
- A locator with adjustable holding guide to hold plates like PCBs
2. The system as per claim 1, capable of tinning fine wired PCBs wherein tinning is the process of coating conductive wires.
3. The system as per claim 1, wherein the method used for tinning of fine wired PCBs of different sizes is unique and is mentioned in detailed description.
4. The system as per claim 1, wherein tinning consumes around 90% lesser time than manual tinning.
5. The system as per claim 1, wherein the method thus used is less hazardous than manual tinning. ,TagSPECI:As per Annexure-II