Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO1991005647 - APPAREIL ET PROCEDE DE ROTOMOULAGE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A rotational moulding apparatus comprising a mould, means for rotating the mould and means for measuring the temperature inside' the mould in order to provide means for controlling the moulding process.

2. A rotational moulding apparatus as claimed in claim

1, in which the means for measuring temperature comprises a temperature monitoring device connected to a processor.

3. A rotational moulding apparatus as claimed in claim

2, in which the processor is disposed in a feedback loop to control the moulding process.

4. A rotational moulding apparatus as claimed in claim 3 , in which the processor is operative to emit a
continuous signal so that an instant temperature readout may be obtained.

5. A rotational moulding apparatus as claimed in claim 4 , in which the continuous signal is received in real time by a control system disposed in the feedback loop.

6. A rotational moulding apparatus as claimed in claim 4 or 5, in which the signal is an infra-red signal.

7. A rotational moulding apparatus as claimed in claim 4 or 5 in which the signal is a radio signal.

8. A rotational moulding apparatus as claimed in claim 1, in which the means for measuring temperature comprises a data logger for logging the temperature.

9. A method of rotational moulding comprising the steps of introducing moulding materials into the mould, heating and rotating the mould and monitoring the temperature inside the mould and controlling the operation of the moulding machine in dependence upon the temperature monitored.

10. A method of rotational moulding as claimed in claim

9, in which a signal is produced from the monitored temperature and transmitted continuously to a control system which is operative to control the moulding process in dependence upon the signal received.

11. A method of rotational moulding as claimed in claim

10, in which the signal is a radio signal.

12. A method of rotational moulding as claimed in claim ιo, in which the signal is an infra-red signal.

13. A method of rotational moulding as claimed in claim 9, in which temperature variation with time is recorded.

14. A method of rotational moulding as claimed in claim-13 , in which a first point is determined on the record representing when all the moulding material is melted located at and identified by means of a discontinuity in the heating up part of the temperature time
characteristic .

15. A method of rotational moulding as claimed in claim 13, in which a second point is determined on the record representing when the moulded article has achieved its optimum properties and identified by testing the
properties of moulded articles at temperatures above the fusion temperatures for different moulding materials.

16. A method of rotational moulding as claimed in claim 13, in which a third point is determined on the record located at and determined by means of a discontinuity in the cooling down part of the temperature time
characteristic .

AMENDED CLAIMS
[received by the International Bureau
on 28 March 1991 (28.03.91);
original claims 1 and 9.amended;
other claims unchanged (2 pages)]

1. A rotational moulding apparatus comprising a mould, means for rotating the mould and means fσr measuring the temperature of the medium inside the mould but outside the material being moulded in order to provide a means for controlling the moulding process.

2. A rotational moulding apparatus as claimed in' claim

1, in which the means for measuring temperature comprises a temperature monitoring device connected to a processor.

3. A rotational moulding apparatus as claimed in claim

2, in which the processor is disposed in a feedback loop to control the moulding process.

4. A rotational moulding apparatus as claimed in claim

3 , in which the processor is operative to emit a
continuous signal so that an instant temperature readout may be obtained.

5. A rotational moulding apparatus as claimed in claim

4, in which the continuous signal is received in real time by a control system disposed in the feedback loop.

6. A rotational moulding apparatus as claimed in claim 4 or 5, in which the signal is an infra-red signal.

7. A rotational moulding apparatus as claimed in claim 4 or 5 in which the signal is a radio signal.

'8. A rotational moulding apparatus as claimed in claim 1, in which the means for measuring temperature comprises a data logger for logging the temperature.

9. A method of rotational moulding comprising the steps of introducing moulding materials into the mould, heating and rotating the mould and monitoring the temperature of the medium inside the mould but outside the material being moulded and controlling the operation of the moulding machine in dependence upon the temperature monitored.

10. A method of rotational moulding as claimed in claim

9, in which a signal is produced from the monitored temperature and transmitted continuously to a control system which is operative to control the moulding process in dependence upon the signal received.

11. A method of rotational moulding as claimed in claim

10, in which the signal is a radio signal.

12. A method of rotational moulding as claimed in claim 10, in which the signal is an infra-red signal.