Device and method for controlling the throughflow of blow-molding fluid during the blow molding of containers
US11338495B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2017 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Dec 23, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/37371
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The disclosure relates to a device and a method for controlling the throughflow of blow-molding fluid during the blow molding of containers. It is the intention to provide a control device and a control method which permit a controlled or defined growth and a defined propagation of the container bubble formed by the expanding preform in the pre-blowing phase of the blow molding process without the specification of a specific setpoint value profile or of a setpoint value curve. The object is achieved by means of a control device and a control method having a proportional valve with a variable throughflow cross section, having an actuator for the operation of the proportional valve, having a means for detecting the position of the actuator, and having sensor means for detecting the valve inlet and valve outlet pressure, wherein a time for the attainment of the yield point for the preform, a container volume and a time period for the attainment of the container volume are predefinable, and, by means of a digital controller, during the pre-blowing phase, from the attainment of the yield point until the run duration, a calculation of control values for the operation of the actuator in o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.