DE2307453C3 - Method for producing a plate-shaped step - Google Patents
Method for producing a plate-shaped stepInfo
- Publication number
- DE2307453C3 DE2307453C3 DE19732307453 DE2307453A DE2307453C3 DE 2307453 C3 DE2307453 C3 DE 2307453C3 DE 19732307453 DE19732307453 DE 19732307453 DE 2307453 A DE2307453 A DE 2307453A DE 2307453 C3 DE2307453 C3 DE 2307453C3
- Authority
- DE
- Germany
- Prior art keywords
- plate
- pressed
- support plate
- compression
- order
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000010410 layer Substances 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 4
- 239000002356 single layer Substances 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 239000004579 marble Substances 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 1
Description
Die Erfindung betrifft ein Verfahren zum Herstellen einer auf Biegung und Torsion beanspruchten en.The invention relates to a method for producing a bending and torsion stressed s.
plattenförmigen Trittstufe mit einer aus hochverdichtetfim Asbestzement bestehenden Tragplatte und mit einer Trittplatte aus Naturstein, insbesondere Marmor, bei dem im nassen Zustand mehrere vorgepreßte Einzelschichten aus langfaserigem Asbestzement aufeinandergelegt und dann unter hohem Druck zur Tragplatte zusammengepreßt werden und bei dem die abgebundene Tragplatte mit der Trittplatte verklebt wird.Plate-shaped step with a high-density film Asbestos-cement base plate and with a step plate made of natural stone, in particular marble, in the wet state several pre-pressed single layers of long-fiber asbestos cement placed on top of each other and then pressed together under high pressure to form the support plate and in which the tied support plate is glued to the step plate.
»ο Mit »vorgepreßten Einzelschichten« sind im vorstehenden Absatz die von der Wickeltromniel kommenden Schichten (Vliese) bezeichnet."Ο With" pre-pressed individual layers "in the previous paragraph are those coming from the winding drum Layers (fleeces) called.
Bei dem bekannten Verfahren (vgl. deutsche Offenlegungsschrift 1 938 113) sind die Einzclschichten Schicht für Schicht aufeinandergebracht und miteinander verpreßt worden. Dabei sind vor dem letzten Preßvorgang alle notwendigen Einzelschichen aufeinandergelegt und dann nochmals unier hohem Druck miteinander verpreßt worden.In the known method (cf. German Offenlegungsschrift 1 938 113), the individual layers are Layered layer by layer and pressed together. Here are before the last Pressing process all necessary individual layers placed on top of one another and then again at a higher level Pressure have been pressed together.
Die Praxis hat ergeben, daß dieses mehrmalige Zusammenpressen unter hohem Druck maschinenteehnisch relativ aufwendig ist und im Ergebnis noch verbessert werden kann, wenn erfindungsgemäß die vorgepreßten Einzelschichtcn zwischenzeitlich jede für sich nachgepreßt werden mit einem Nachpreßdruck in der Größenordnung zwischen dem Vorpreß- und dem Zusammenpreßdruck.Practice has shown that this repeated pressing together under high pressure is technically mechanical is relatively expensive and the result can be improved if, according to the invention, the prepressed In the meantime, individual layers are re-pressed individually with a re-pressing pressure in the order of magnitude between the pre-compression and the compression pressure.
Durch dieses Vorgehen wird das mehrmalige Zusammenpressen einer Tragplatte vermieden und außemcm erreicht, daß sich nichtwcrfende Tragplatten hergestellt werden können. Daraus ergibt sich der besondere Vorteil, daß die Nulurstcinplatlcn von den gemäß der Erfindung hergestellten Tragplatten r.icht zerrissen werden.This procedure avoids the repeated pressing together of a support plate and outside of the fact that non-throwing support plates can be produced. This has the particular advantage that the Nulurstcinplatlcn from the Support plates produced according to the invention are not torn.
Es ist zweckmäßig, die Einzclschichten mit Proßdrücken in der Größenordnung von 35i)kncmnachzupresscn und die aufeinandergelegten liinzelschichlen mit einem Preßdruck in der Größenordnung von 3000 bis 4000 kp/cnv- zusammcnzuiressen. Durch Autoklavieren unter hohem Druck wird eine weitere Erhöhung der Festigkeit erreicht.It is advisable to press the individual layers with pressure in the order of magnitude of 35i) kncm to be repressed and the one on top of the other liinzelschichlen zuiressen with a pressure of the order of 3000 to 4000 kp / cnv-. A further increase in strength is achieved by autoclaving under high pressure.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH531072 | 1972-04-11 | ||
CH531072A CH541053A (en) | 1972-04-11 | 1972-04-11 | Plate-shaped tread with a high-density asbestos-cement base plate and a natural stone tread plate, in which the base plate is firmly connected to the tread plate, as well as a method for producing such a step, subject to bending and torsion |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2307453A1 DE2307453A1 (en) | 1973-10-25 |
DE2307453B2 DE2307453B2 (en) | 1974-01-31 |
DE2307453C3 true DE2307453C3 (en) | 1977-05-12 |
Family
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