Eddyde

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Or the confessions of a vintage machine hoarder enthusiast.

This journey started during the "Cigar Fad" of the mid 90's. At the time, I had a partnership in a custom cabinet and millwork shop. One day, my partner, Philippe, brought in a picture of a humidor and said he had a friend who would wanted him to make one for him. The one on the picture was $1,500 but philippe said he could do it for half that, Indeed $750 back then was great money for fairly simple wooden box. Philippe made the humidor, his friend loved it and so did all his friends and more orders started coming. Seeing a wide market potential, we went all-into the humidor business.

Months later, we had a final design, I built custom jigs, fixtures, modified and built machines, all to optimize production. These humidors could sell up to $1k per unit and I wanted it to take less than 2 hrs to produce each unit. One of the slow spots in the production was veneering the boxes as conventional adhesives were messy and very time consuming. The answer, film adhesive a clear plastic film that was only about 3 thou thick but created a super strong, moisture proof, bond with only about a 1 minute cycle time. It was the perfect adhesive for bonding veneer to humidors. However, it required heat and a LOT of pressure. About 120 psi, far more than a vacuum bag, our usual go-to for veneering, could achieve. The first attempt was a HF (mail order) "12 ton" press, with a 1.25" thick aluminum platen heated with a heat gun. We got some success but the press proved to be a total pice of junk and was ultimately, unusable. I considered building a press but then found one one in the classified ads "30 ton hydraulic press $250" Perfect. It was a KR Wilson brand made in 1943 and had a US Navy badge on it but apparently spent most of its life in the Castro Convertible, sofa factory. It had a slight hydraulic leak, so I wound up rebuilding the cylinder and pump. With a redesigned electrically heated platen, the press was able to veneer the boxes in minutes instead of hours.

Indeed, I was able to bring production time to about two hours per box, including finishing. if we could have only sold them that fast we might have made some real money. Alas it was not to be, after a brief run of success, the humidor business dried up... The jigs and fixtures were repurposed the machines were restored to normal and the press was shoved in a corner and forgotten...

About 12 years later, I had left the business, Philippe still had the shop and wanted the press gone as he needed the space. I really wanted to hold on to it, knowing I would eventually have another shop and would "Need" it. However, I already had a few, more important machines, stored there and could use the extra cash at the time, so I sold the press for $400…

Sure enough, 2 years later I bought a house with a large basement for my shop. I brought my machines there, a lathe, 2 drill presses, a bandsaw, welders, etc.. and I immediately started lamenting the absence of the press…

Of course I had to ask myself, Do I really need a hydraulic press? I have certainly gone without one for quite some time, limping along with a measly 2 ton arbor press. Also, I don’t really have any space for one, at least down here in my basement shop. Bending that is a capability that would somewhat justify it but I could get by with the vise and torch like I’ve been doing, pressing bearings? also been making due with what I have… Though the longing still persisted, reason kept it at bey… However, I kept the eye out of that possible “Unicorn”.

The tipping point came when my friends Sven & Erica bought a place nearby. Sven is into flint knapping and makes beautiful knives out of stone, bone and other non-metallic materials. However he now wants to get into forging knives out of steel, something I have also wanted to get into for many years, as well. So after a few beers it was decided we would pool our resources and get a forging shop together.

Sven started by getting an anvil and gas forge from Vevor, just as a low cost start up. We figure we would get or make better gear as we progress an figure out exactly what we want. Watching dozens of forging videos and episodes of Forged in Fire showing blade smiths making Damascus steel, lead me to one conclusion, Now I need absolutely need a hydraulic press…

The the vintage tool gods listened, a week later an ad came up on Facebook Marketplace for a 50 ton KR Wilson Press with an electric HPU for only $400! But then my heart sank as I noticed The ad was placed 2 day prior, surely it was gone by now… Of course I sent a message anyway “I’ll take it, when can I come get it?” Two anxious days went by till I got a response “Tomorrow at 5:30?” A short two hr drive to Pennsylvania with the flatbed trailer and the press followed me home! It’s as if it was a lost son, away for all those years and now returned home, all grown up.
Press ad.jpg
The Press as it appeared in the FB Marketplace ad.
KRW Press - 1 (2).jpeg
The shop I bought it from had a crane on the loading dock, so getting it on the trailer was easy peasy.
KRW Press - 1 (4).jpeg
Of course I don't have a loading dock or a gantry crane so how do I get this 1,300# beast off the trailer...
KRW Press - 5 (1).jpeg
I attached some temporary skid plates I made out of plywood, 2x lumber and steel angle.
KRW Press - 11.jpeg
We put pipe rollers under the skids and tied the press to the generator pad, By inching the trailer forward the press tipped off the back...
KRW Press - 13.jpeg
Of course we had the top of the press also secured with a belay line so we could it set down gently. Sven made some side to side adjustments with the J-bar, he was a great help especially as he is a professional rigger.
KRW Press - 16.jpeg
Now the fun begins!
KRW Press - 6.jpeg
I crushed some steel just to test it. The plan is to rebuild it over the winter, relocate it to its permanent place in the spring, and then forge ahead!

Thanks for looking.
 
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Great story Ed. Nice score!

Gotta love it when the stars align and a tool emerges. I didn’t know a press was used in making knives.
 
I got the electrical reconfigured. It was wired for 480v three phase, the starter was old and not in the correct enclosure so I just bought a new one.
Fortunately, the motor wires weren't too crusty and re-splicing them for 240v was without issue. I did replace the cable between the starter and the motor as it was only 14 gauge, okay perhaps for a 5 hp motor at 480v but not at 240v. I also changed the wire going to the switch as it was pretty crumbly. A "new" power cord and proper plug was added as well.

The control valve & start switch are operated by the same lever. It's kind of a primitive arrangement. A tab welded on the side of the lever actuates a micro-switch attached to the top of the valve housing. When pushed forward the lever simultaneously starts the pump motor and routs the hydraulic fluid to the cylinder, forcing the ram down. Returning the lever to the center, neutral position shuts the pump, the cylinder is locked out and the ram will hold its position. Pulling the lever all the way to the rear, opens the valve, a spring inside the cylinder pushes the ram up and the hydraulic fluid flows back to the reservoir.

One safety problem, the switch is very sensitive and the lever can trip it under its own weight, This was noticed when I first plugged it in and the motor came on! It appears the lever return spring inside the valve block is worn or broken. There had been a "safety" interlock button, that someone had wired in that also needed to be pressed to start the motor, but it was in the opposite side of the machine and required one to have your arms spread, right in from of the press while its operating, not too safe either... Also I will need to have at least one hand free while operating it.

So, I am contemplating solutions. My first thought is to wire a smaller safety interlock button on the end of the lever so it can be pushed at the same time. Of course the lever spring must also be fixed.

Another Idea is to do away with the on-off and have the pump run continuously. Install a modern hydraulic valve that would allow the fluid to cycle through to the reservoir when in the neutral position.

A hybrid of that idea is to install an electrically controlled hydraulic valve. That could open the possibilities of electronic control, like pressing to a set thickness, auto cycle up and down, etc. A foot switch would also be possible.

KRW Press - 2.jpeg
No good...
IMG_6618.jpeg
Much better...
IMG_6619.jpeg
The wonky lever-switch...

I welcome any other Ideas on how to control this beast!
 
I'd go with the motor on/ off controlled by a separate switch, then a two (three?) way hydraulic valve. Ideally one that is proportional, not just on/ off, as it can be a big help to be able to slow down the extension or feather the amount of pressure the press is exerting. Otherwise they can become very efficient ways of breaking things.
 
Thanks, that's a very good idea, I'll see what kind of proportional valves are available. One issue I'm finding; the working pressure of the press is 5,100 psi (@50 Tons), and the pump is rated at up to 10,000 psi output. However, it seems many hydraulic components are only rated around 3,500-4,500 psi, the 5,000-10,000 psi rated stuff is harder to find and gets quite expensive.
 
Ed, that is one magnificent press you got there. And sorry about the humidor business. At least it made for a good story, and memories.
 
Ed, that is one magnificent press you got there. And sorry about the humidor business. At least it made for a good story, and memories.
Thanks. The humidor business and the cigar fad was doomed by timing. For one thing, it coincided with the rise in antismoking laws, making the habit unappealing and taboo to many. Then there was the the shortage of quality cigars due to the fact that it takes several years to properly age a cigar, when the fad hit there simply weren't enough good cigars to fill the demand, and they couldn't be produced fast enough. Prices for quality cigars went through the roof. Also, just about every woodworker and cabinet shop in the country started making humidors...
 
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