Gas springs in vacuum veneer press ensure easy handling and protect the valuable machine
Teamwork of gas springs: in a double pack they ensure a smooth workflow when handling the flaps
A vacuum veneering press is a ground-breaking invention, in particular for small carpenter’s shop. It is a fully-fledged substitute for a hydraulic veneering press – with an enormous advantage: It doesn’t require the time-consuming and relatively cost-intensive heating of the hydraulic veneering press. The vacuum veneering press is immediately ready for use.
The vacuum veneering press has two flaps: The upper flap is just for protecting the vacuum membrane of the flap below when the press is not needed.
Functioning: When the flaps are closed, the gas springs are neutral, i.e. the flaps are kept in this position by their own weight. To open the flaps, you lift them a little bit by hand. After a few degrees the gas springs take over, and open the respective flap until the desired opening degree of about 50°.
When planning the gas springs two points were enormously important:
- Firstly, each gas spring is configured for its respective flap. However, when both flaps are lifted together, the gas springs work as a team, i.e. lifting both flaps is just as easy as lifting just one – although, in this case, the pivot point of the upper flap changes!
- It has to be made sure that the flaps never fall down without control, even on the last 10 – 20°. This could damage the vacuum membrane and result in a very expensive repair.
If the machine is no longer needed, it can be folded up to save space and be pushed in a corner. Also in this case the gas springs ensure that the flaps stay firm in their position and don’t move.
Function of the machine
It is not only intended for veneering objects. Its most important advantage is that it also helps to glue moulded parts. You just make a counter template, put it on the table of the press, place the straight workpiece on top of it and close the flap with the vacuum membrane. Now the built-up vacuum presses the work piece against the stencil and thus forms it into the desired shape.
If the vacuum veneering press is closed, the gas springs behave neutrally. They exert no force on the flaps.
When working, the gas springs keep the upper protection flap safely open. The lower flap with the vacuum membrane lies over the work piece which has to be veneered. Once the process is finished, the mechanical locks are released. However, the membrane flap opens only when this is actually required, i.e. when lifted slightly with the hand. The gas springs do the rest!