the operation: start with using a rolled on PUR adhesive (no heat involved) applied to the laminate strips; add plain water spray from the bottle as this is part of the glue action to the laminate; PUR needs water spray. Next position the laminate (lam) on the surface to be covered. Insert these pieces in the membrane press (flip top model) and draw down the membrane to approx. .9 bar vacuum. Let cure for approximately 8 minutes and remove from press. Vacuum accelerates the curing to a big advantage. The clear liner positioned over the lam keeps the membrane from sticking to the product. This process shown here applies approximately 1600 lbs pressure per square foot area. The pressure is applied in all directions so curved surfaces are evenly pressured. Some shops use talc powder to coat the membrane to prevent sticking. There are some Euro membrane presses using a silicone membrane and heat to really accelerate the process. Another advantage of a membrane press is its ability to apply pressure overall simultaneously to a multitude of levels to be applied.
That's a lot of CAPEX on that glue spreader and press and two blokes, just to make a few mouldings. What do they sell for and what is the return on capital cost?
The heated process with profile rollers to mount the lam is less costly in terms of machine cost, prep, materials and labor; but, that process requires super tight tolerances and you can make warped product if the process is not followed. To use a regular clamshell press with more profiles-lam pieces up would be a lower cost. This process shown here has a tank under vacuum that quickens the draw down time; I suspect the tank is not large enough to obtain max production. A bigger vac pump with more volume along with a larger tank would really speed up the process. A really good vac system takes about 10 seconds to draw down and come to max vac pressure. Most companies making membrane presses do not have adequate vac pressure or tank capacity in order to keep the cost competitive. The glue applicator is probably about $7K, membrane press with rotating frames may be $35K on special order (if you upgrade the vac system may increase cost by $10K.
I am going to make my own press myself. I have already built a very high efficient vacuum pump with tank reserve. And will build vacuum press frame similar to what is used in this video. And also make my own vacuum bag.
@@MissionaryForMexico Try to find fittings for a manifold to have two hoses going into the tank from vacuum and two fittings to go to the two way valve that connects the pump to the valve to the table. I had a devil of a time finding Euro threaded fitting and bought a die of 22MM X 1.0 and cut a slightly oversized brass fitting to work down to metric dia threads. There is a difference in US fittings that will cause the 22MM die to cut fitting wall too thin and the last turn of the die breaks a 45 minute thread job. Stuff from China is bad news for brass fittings. OMG Try to find vacuum approved hoses that will not collapse from the vacuum. I have a PVC white pipe manifold with extra branches for attaching a bag. Never have gotten a bag due to the work I do. Furniture, air foils for the van, veneer applied to tables tops, butcher block tops etc. Former ROTC SDSU Army '66. How much Bar does your vacuum pump draw? There are several makers from Europe of vacuum pumps-wet that use different Euro pumps from the German or Italian made turbines and motors. See lots of similar parts on different brand wet pumps. Manufacturers like to put high markup on their pumps and hide where they source their membrane press parts. I saved some $3K by searching and comparing on the net. My German is OK but Italian words are not same as from Mexico. For some projects to vacuum membrane press of large cube sizing it takes more than the dry pumps can handle and you have problems with the fit and final product. Merry Christmas
@@MissionaryForMexico Also if you can find a natural rubber membrane vs. some of the cheaper US membrane materials you will find a big advantage when you get into larger (stretch required) products. The silicone membranes out of Europe are bigger money with same stretch characteristics as rubber. Silicone allows extra heat to be applied when working the vacuum with a heat hood-tunnel over the membrane. Also depends what adhesive you want to use.
the operation: start with using a rolled on PUR adhesive (no heat involved) applied to the laminate strips; add plain water spray from the bottle as this is part of the glue action to the laminate; PUR needs water spray.
Next position the laminate (lam) on the surface to be covered. Insert these pieces in the membrane press (flip top model) and draw down the membrane to approx. .9 bar vacuum. Let cure for approximately 8 minutes and remove from press. Vacuum accelerates the curing to a big advantage. The clear liner positioned over the lam keeps the membrane from sticking to the product. This process shown here applies approximately 1600 lbs pressure per square foot area. The pressure is applied in all directions so curved surfaces are evenly pressured. Some shops use talc powder to coat the membrane to prevent sticking. There are some Euro membrane presses using a silicone membrane and heat to really accelerate the process. Another advantage of a membrane press is its ability to apply pressure overall simultaneously to a multitude of levels to be applied.
Sta je to cime se prska furnir i zbog cega se prska i koji lepak se koristi za lajsne ako je na hladno lepljenje
That's a lot of CAPEX on that glue spreader and press and two blokes, just to make a few mouldings. What do they sell for and what is the return on capital cost?
The heated process with profile rollers to mount the lam is less costly in terms of machine cost, prep, materials and labor; but, that process requires super tight tolerances and you can make warped product if the process is not followed. To use a regular clamshell press with more profiles-lam pieces up would be a lower cost. This process shown here has a tank under vacuum that quickens the draw down time; I suspect the tank is not large enough to obtain max production. A bigger vac pump with more volume along with a larger tank would really speed up the process. A really good vac system takes about 10 seconds to draw down and come to max vac pressure. Most companies making membrane presses do not have adequate vac pressure or tank capacity in order to keep the cost competitive. The glue applicator is probably about $7K, membrane press with rotating frames may be $35K on special order (if you upgrade the vac system may increase cost by $10K.
I am going to make my own press myself. I have already built a very high efficient vacuum pump with tank reserve. And will build vacuum press frame similar to what is used in this video. And also make my own vacuum bag.
@@MissionaryForMexico Try to find fittings for a manifold to have two hoses going into the tank from vacuum and two fittings to go to the two way valve that
connects the pump to the valve to the table. I had a devil of a time finding Euro threaded fitting and bought a die of 22MM X 1.0 and cut a slightly oversized brass fitting to work down to metric dia threads. There is a difference in US fittings that will cause the 22MM die to cut fitting wall too thin and
the last turn of the die breaks a 45 minute thread job. Stuff from China is bad news for brass fittings. OMG
Try to find vacuum approved hoses that will not collapse from the vacuum. I have a PVC white pipe manifold with extra branches for attaching a bag. Never have gotten a bag due to the work I do. Furniture, air foils for the van, veneer applied to tables tops, butcher block tops etc.
Former ROTC SDSU Army '66.
How much Bar does your vacuum pump draw? There are several makers from Europe of vacuum pumps-wet that use different Euro pumps from the
German or Italian made turbines and motors. See lots of similar parts on different brand wet pumps. Manufacturers like to put high markup on their pumps and hide where they source their membrane press parts. I saved some $3K by searching and comparing on the net. My German is OK but Italian words are not same as from Mexico. For some projects to vacuum membrane press of large cube sizing it takes more than the dry pumps can handle and you have problems with the fit and final product. Merry Christmas
@@MissionaryForMexico Also if you can find a natural rubber membrane vs. some of the cheaper US membrane materials you will find a big advantage when you
get into larger (stretch required) products. The silicone membranes out of Europe are bigger money with same stretch characteristics as rubber. Silicone
allows extra heat to be applied when working the vacuum with a heat hood-tunnel over the membrane. Also depends what adhesive you want to use.
Koje ljepilo koriste? Hvala.
It would be more interesting to have someone talk about the operation, as opposed to just keep watching the same exact process!
read the info from Vin Rolfe, Chicago. Any other questions let me know.