Method for controlling the free deformation of thermoplastic mat

Details Method for controlling the free deformation of thermoplastic mat Method for controlling the free deformation of thermoplastic mat

1994-09-21

1997-03-18

Cano, Milton

Glass manufacturing

Processes

With measuring, sensing, inspecting, indicating, or testing

65 2914, 65102, 65109, 65113, 65158, 65160, 65270, 65271, 65272, 65280, 65DIG13, C03B 2100

Patent

active

056118341

ABSTRACT:
The invention is directed to a method for controlling the free deformation of thermoplastic material in an automated process for processing the material to form articles. These articles are especially ampules, small bottles and the like produced from glass tubes. In this method, in order to obtain a high dimensional accuracy of the article, a corrective action is carried out by applying heat to the starting material in the deformation region in the heating phase. This corrective action takes place in dependence on a desired-value/actual-value comparison of the deformation of a workpiece achieved in a predetermined working step. In order to exclude interference influences in the development of the deformation, the measurement of the deformation achieved, the desired-value/actual-value comparison and the corrective action are carried out in situ on one and the same workpiece during shaping of the deformation in the heating phase.

REFERENCES:
patent: 2282993 (1942-05-01), Dichter
patent: 3415370 (1968-12-01), Huoml
patent: 3462255 (1969-08-01), Couquelet
patent: 3852054 (1974-12-01), Dichter
patent: 3874867 (1975-04-01), Dichter
patent: 4330317 (1982-05-01), Vertova
patent: 4516998 (1985-05-01), Ritt et al.
patent: 4675043 (1987-06-01), Conta et al.
patent: 5300134 (1994-04-01), Monn et al.
"The Moderne Mecanique MM 30 pharmaceutical ampoule machine", Moderne Mecanique, Chelles Cedex, France.
"Spear Regulation Control for Ampoule Automate", Techner Ltd., London, England.

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