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as i recall...and im old
first thing to be done was to build a polished steel buck.the glass would b=
e cut to shape.then carefully clamped to the buck and put into an oven wher=
e the glass was heated until it slumped and settled on the buck. this is wh=
y you often saw distortion.after the hot slump the glass was allowed to coo=
l slowly for annealed or quenched quickly with "cool" air for tempered glas=
s. very little tempered glass went into laminated car windshields.
it required 2 bucks one for the outer light and one for the inner light.bot=
h having slightly different radi.smart folks developed bucks with a crank t=
hat could change the curve slightly if it was not a compound.
then one light of glass would have the PVB inter layer placed over it. it w=
ould have been slightly oversize for the size of the glass.
carefully 2 guys would place the second light of glass onto the first glass=
& PVB so that the edges lined up properly.touch at one end and kinda roll =
the glass into place.
manual roller firm but not heavy across the glass.
there would often be small air pockets visible at this time. and even today=
in manual lines you still see some small air pockets at this stage.
the PVB is not intentionally sticky but does cling enough to hold the glass=
together now
the assembly then as now went into an autclave stacked on edge.
steam is pumped into the autoclave and pressurized to force the 2 lights of=
glass together. the hot steam softening the PVB and allowing it to absorb =
the small air pockets that may have been present and take up irregularities=
in the curve difference of the 2 glass lights..
allow to cool gently.
knife off the laminate that was oversize.
its funny how the PVB sucks up some of the small air particles. i have ofte=
n though that's why we start to see bubbling around the edges of old lamina=
tes.
there are i believe, some old time fabricators who can still make laminates=
this old way but i expect they want big bucks.
im not sure when better automated machinery took over. it had to have been =
after the war. to start producing cars at the rate we did this was not an e=
fficient process.
today we are messing with "cold bending" glass. trying to get it to take sh=
ape using less energy. but like vacuum formed insulating glass we are only =
in research and development.
we recently ran a series of tests on some glass products here with general =
contractors, architects and building owners present.one contractor noted it=
was the boring day he had spent watching a test.
From: Randall <TR3driver@ca.rr.com>
To: 'Triumphs List' <triumphs@autox.team.net>=20
Sent: Thursday, November 19, 2015 1:43 PM
Subject: Re: [TR] Broken Windshield
=20
> Is it possible to have this repaired=20
Sure, it's possible.=C2=A0 First you melt the glass down ...
Which leads me to an odd question : Does anyone know what the manufacturing=
process would have been back then?=C2=A0 Roll the glass out
flat and then curve it during the tempering or laminating process?
Randall Y.
** triumphs@autox.team.net **
Archive: http://www.team.net/archive
3@yahoo.com
------=_Part_6308148_1365785957.1447974765992
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<html><head></head><body><div style=3D"color:#000; background-color:#fff; f=
ont-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, =
sans-serif;font-size:16px"><div id=3D"yui_3_16_0_1_1447966691641_14164" dir=
=3D"ltr"><span id=3D"yui_3_16_0_1_1447966691641_15522">as i recall...and im=
old</span></div><div id=3D"yui_3_16_0_1_1447966691641_14164" dir=3D"ltr"><=
span><br></span></div><div id=3D"yui_3_16_0_1_1447966691641_14164" dir=3D"l=
tr"><span id=3D"yui_3_16_0_1_1447966691641_15405">first thing to be done wa=
s to build a polished steel buck.</span></div><div id=3D"yui_3_16_0_1_14479=
66691641_14164" dir=3D"ltr"><span id=3D"yui_3_16_0_1_1447966691641_15521">t=
he glass would be cut to shape.</span></div><div id=3D"yui_3_16_0_1_1447966=
691641_14164" dir=3D"ltr"><span id=3D"yui_3_16_0_1_1447966691641_15491">the=
n carefully clamped to the buck and put into an oven where the glass was he=
ated until it slumped and settled on the buck. this is why you often saw di=
stortion.</span></div><div id=3D"yui_3_16_0_1_1447966691641_14164" dir=3D"l=
tr"><span id=3D"yui_3_16_0_1_1447966691641_16651">after the hot slump the g=
lass was allowed to cool slowly for annealed or quenched quickly with "cool=
" air for tempered glass. very little tempered glass went into laminated ca=
r windshields.</span></div><div id=3D"yui_3_16_0_1_1447966691641_14164" dir=
=3D"ltr"><span><br></span></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966=
691641_15635">it required 2 bucks one for the outer light and one for the i=
nner light.</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15636">b=
oth having slightly different radi.</div><div dir=3D"ltr" id=3D"yui_3_16_0_=
1_1447966691641_15636">smart folks developed bucks with a crank that could =
change the curve slightly if it was not a compound.</div><div dir=3D"ltr" i=
d=3D"yui_3_16_0_1_1447966691641_15637"><br></div><div dir=3D"ltr" id=3D"yui=
_3_16_0_1_1447966691641_15638">then one light of glass would have the PVB i=
nter layer placed over it. it would have been slightly oversize for the siz=
e of the glass.</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_1563=
9"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668">caref=
ully 2 guys would place the second light of glass onto the first glass &=
; PVB so that the edges lined up properly.</div><div dir=3D"ltr" id=3D"yui_=
3_16_0_1_1447966691641_15668">touch at one end and kinda roll the glass int=
o place.</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668"><br>=
</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668">manual rolle=
r firm but not heavy across the glass.</div><div dir=3D"ltr" id=3D"yui_3_16=
_0_1_1447966691641_15668"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_144=
7966691641_15668">there would often be small air pockets visible at this ti=
me. and even today in manual lines you still see some small air pockets at =
this stage.<br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_1566=
8"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668">the P=
VB is not intentionally sticky but does cling enough to hold the glass toge=
ther now</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668"><br>=
</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668">the assembly=
then as now went into an autclave stacked on edge.</div><div dir=3D"ltr" i=
d=3D"yui_3_16_0_1_1447966691641_15668"><br></div><div dir=3D"ltr" id=3D"yui=
_3_16_0_1_1447966691641_15668">steam is pumped into the autoclave and press=
urized to force the 2 lights of glass together. the hot steam softening the=
PVB and allowing it to absorb the small air pockets that may have been pre=
sent and take up irregularities in the curve difference of the 2 glass ligh=
ts..</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668"><br></di=
v><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668">allow to cool ge=
ntly.</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668"><br></d=
iv><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668">knife off the l=
aminate that was oversize.</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966=
691641_15668"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_1=
5668">its funny how the PVB sucks up some of the small air particles. i hav=
e often though that's why we start to see bubbling around the edges of old =
laminates.</div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668"><b=
r></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668">there are =
i believe, some old time fabricators who can still make laminates this old =
way but i expect they want big bucks.</div><div dir=3D"ltr" id=3D"yui_3_16_=
0_1_1447966691641_15668"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447=
966691641_15668">im not sure when better automated machinery took over. it =
had to have been after the war. to start producing cars at the rate we did =
this was not an efficient process.</div><div dir=3D"ltr" id=3D"yui_3_16_0_1=
_1447966691641_15668"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966=
691641_15668">today we are messing with "cold bending" glass. trying to get=
it to take shape using less energy. but like vacuum formed insulating glas=
s we are only in research and development.</div><div dir=3D"ltr" id=3D"yui_=
3_16_0_1_1447966691641_15668"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1=
_1447966691641_15668">we recently ran a series of tests on some glass produ=
cts here with general contractors, architects and building owners present.<=
/div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668">one contracto=
r noted it was the boring day he had spent watching a test.</div><div dir=
=3D"ltr" id=3D"yui_3_16_0_1_1447966691641_15668"><br></div><div dir=3D"ltr"=
id=3D"yui_3_16_0_1_1447966691641_15668"><br></div><div dir=3D"ltr" id=3D"y=
ui_3_16_0_1_1447966691641_15668"><br></div><div dir=3D"ltr" id=3D"yui_3_16_=
0_1_1447966691641_15668"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1447=
966691641_15668"><br></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_144796669164=
1_15668"><br></div> <div style=3D"font-family: HelveticaNeue, Helvetica Ne=
ue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id=3D"yu=
i_3_16_0_1_1447966691641_14167"> <div style=3D"font-family: HelveticaNeue, =
Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16p=
x;" id=3D"yui_3_16_0_1_1447966691641_14166"> <div dir=3D"ltr" id=3D"yui_3_1=
6_0_1_1447966691641_14168"> <hr size=3D"1" id=3D"yui_3_16_0_1_1447966691641=
_15490"> <font size=3D"2" face=3D"Arial" id=3D"yui_3_16_0_1_1447966691641_1=
5409"> <b id=3D"yui_3_16_0_1_1447966691641_15408"><span style=3D"font-weigh=
t:bold;" id=3D"yui_3_16_0_1_1447966691641_15407">From:</span></b> Randall &=
lt;TR3driver@ca.rr.com><br> <b><span style=3D"font-weight: bold;">To:</s=
pan></b> 'Triumphs List' <triumphs@autox.team.net> <br> <b><span styl=
e=3D"font-weight: bold;">Sent:</span></b> Thursday, November 19, 2015 1:43 =
PM<br> <b><span style=3D"font-weight: bold;">Subject:</span></b> Re: [TR] B=
roken Windshield<br> </font> </div> <div class=3D"y_msg_container" id=3D"yu=
i_3_16_0_1_1447966691641_14165"><br>> Is it possible to have this repair=
ed <br clear=3D"none"><br clear=3D"none">Sure, it's possible. First y=
ou melt the glass down ...<br clear=3D"none"><br clear=3D"none">Which leads=
me to an odd question : Does anyone know what the manufacturing process wo=
uld have been back then? Roll the glass out<br clear=3D"none">flat an=
d then curve it during the tempering or laminating process?<br clear=3D"non=
e"><br clear=3D"none">Randall Y.<div class=3D"qtdSeparateBR"><br><br></div>=
<div class=3D"yqt2420898632" id=3D"yqtfd87135"><br clear=3D"none"><br clear=
=3D"none"><br clear=3D"none">** <a shape=3D"rect" ymailto=3D"mailto:triumph=
s@autox.team.net" href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.te=
am.net</a> **<br clear=3D"none"><br clear=3D"none">Donate: <a shape=3D"rect=
" href=3D"http://www.team.net/donate.html"; target=3D"_blank">http://www.tea=
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/a><br clear=3D"none">Forums: <a shape=3D"rect" href=3D"http://www.team.net=
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>Unsubscribe/Manage: <a shape=3D"rect" href=3D"http://autox.team.net/mailma=
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iv><br><br></div> </div> </div> </div></body></html>
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Archive: http://www.team.net/archive
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