Friday, July 29, 2016
Other parts are heat sealed too. For instance, the air tight bad that the film is wrapped in is heat sealed. This is a simple operation compared to the pods, which is more complex.
The distribution of heat, how long it is applied, and pressure on the seal greatly affects how well the seal performs. In our case, we produce a frangible seal. This is a special type of seal designed to break open at just the right pressure, and requires very precise pressure and temperature.
Various industries are trying to make tools to measure sealing performance and sealing tool quality. Here is such a tool: It produces a color-coded map of pressure, which could be useful. One thing that is shown here is an acoustic horn, which is part of the business end of an ultrasonic welder. Instead of just being hot, ultrasound waves are transmitted into the material to heat it up by just the right amount.
Thursday, July 28, 2016
We have to cut color negative stock, which comes in a wide roll, down to about a four inch width after which the roll goes into a dark chamber to be cut into individual sheets. I had looked for a reasonably priced commercial slitter but all I could find were machines in the $10,000 and up range.
A trip to Home Depot yielded a little circular saw which was almost toylike. This was mounted on the South Bend Heavy 10 lathe we have in the lab (this is a special NASA owned lathe bought surplus from the Apollo Program). A mandrel made of a broomstick and a "pool noodle" was used to spin the roll while it cut.
|The impromptu "log slitter" on an old (but very fine) South Bend|
lathe. The log rotates a big roll of color film. The yellow part
is a "pool noodle" used in swimming pools.
Thursday, July 21, 2016
Now that we have your attention on receiver sheets, notice how good and smooth the coverage is and how much better the tonal scale is. It is an achievement.
It find it hard to believe that this very obscure but critical chemical process, which was so costly to develop and learn how to make, is finally something we have firmly in hand, and am amazed when the photograph is peeled. It is unique in all the world; We are the only company on earth who manufacture instant peelapart films, and it is now becoming apparent that we need to expand to color and other formats, too. I would expect we can use this in an instant 8x10 system, but we'd have to make a wider coating machine. You can see the scanned negatives of these photographs on flickr at this link.
Wednesday, July 20, 2016
|Prepared for brazing out on the loading dock|
Additions are the extra filling port seen being prepared for silver brazing and the rather scorched looking aftermath. This is normal.
A special rotary feedthrough goes on the top and gets connected to a powerful motor, as the color reagent is thick and requires a lot of mixing.
New55 has to do a lot of its own machine building and some of it is improvised. These make good starting points and allow us to make valid predictions about cost and yield if and when high speed production machinery is ever available to us.
|The rotary seal is upside down and has four|
separate pressure and vacuum ports
|You can buy beer making equipment that looks|
like this and then drill holes and braze on more
fittings if you have the tools.
Sunday, July 17, 2016
For no real reason, an Aero Ektar with a yellow dot sells for more than one with no dot.
Here is a drilled, counterfeit dot! Not only is the Testors yellow paint slopped over the edge unlike a real dot, but the depression is incorrectly shaped and poorly centered. A genuine dot is flat, perfectly centered, and shows shallow grooves of the ring engraving tool.
You've been warned.