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Method for regulating the cyclic production of containers by stretch-blowing

An adjustment method, stretch blowing technology, applied in the direction of control/adjustment system, general control system, instrument, etc., can solve the problems of pre-blowing process deviation, production capacity reduction, etc.

Pending Publication Date: 2021-11-23
SIDEL PARTICIPATIONS SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, there will be deviations in the pre-blowing process and a reduction in production capacity

Method used

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  • Method for regulating the cyclic production of containers by stretch-blowing
  • Method for regulating the cyclic production of containers by stretch-blowing
  • Method for regulating the cyclic production of containers by stretch-blowing

Examples

Experimental program
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Effect test

Embodiment Construction

[0085] figure 1 Partially shown is a machine 1 for the periodic production of containers 2 from plastic preforms 3 by stretch blow molding.

[0086] The preform 3 is made, for example, of polyethylene terephthalate (PET).

[0087] Each preform 3 has a neck 4 and a cylindrical body 5 terminating in a hemispherical bottom 6 .

[0088] The machine 1 has at least one stretch blowing station 7, figure 1 Only one station 7 is shown in . Each station 7 is usually mounted on a base, such as the periphery of a mounting carousel.

[0089] The station 7 has a mold 8 with a cavity 9 for receiving a preform 3 , having the shape of the container to be made.

[0090] Preferably, the station 7 has a stretching rod 10 mounted slidably relative to the mold 8 along a main axis X (generally the axis of rotation).

[0091] The station 7 has control means (not shown) for controlling the axial movement of the stretching rod 10, preferably electromagnetic.

[0092] The station 7 has a blowpipe ...

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PUM

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Abstract

The invention relates to a method for regulating the cyclic production of containers (2) by stretch-blowing from preforms (3), comprising: a) a phase of initializing a plurality of operating parameters of the machine (1) during the production cycle and of regulation parameters including at least one reference position (Ac, Bc, PCab, Fc) of at least one characteristic point (A, B, Pab, F) of a pre-blowing curve; b) a phase of regulated production, during which: b1) the pre-blowing curve is measured and stored and a real instant and / or a real pressure is computed that corresponds to said characteristic point (A, B, Pab, F); and b2) a new value of at least one operating parameter of the machine (1) is computed as a function of a difference between the real instant and the reference instant and / or between the real pressure and the reference pressure, characterized in that the regulated production phase includes a step b3) of monitoring a possible change imposed by the operator of a value of an operating parameter of the machine (1), and further comprising a phase of automatically updating regulation parameters including: c1) a stabilisation step, during which production continues and the actions b1) are executed and the actions b2) are suspended; and c2) a step of correcting the reference instant and / or the reference pressure as a function of the real instant and / or real pressure values stored during the stabilisation step, in order to continue the regulated production phase.

Description

technical field [0001] The invention relates to a method for regulating the periodic production of containers from preforms made of plastic by stretch-blowing in a machine having one or more stretch-blowing stations, each stretch-blowing station being designed to produce The containers are produced during the cycle, each stretch-blowing station is equipped with a pre-blowing solenoid valve which fluidly connects the preform to a source of pressurized fluid during the pre-blowing process. Background technique [0002] Cyclic stretch blowing to produce containers typically involves heating a plastic preform up to the glass transition temperature of the preform, introducing the heated preform into a mold, injecting a fluid under pressure into the mold to A container is formed, and the container is removed from the mold. [0003] The injection of pressurized fluid itself consists of several successive steps. The first so-called pre-blowing step consists in injecting the prefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/78B29C49/06B29K67/00B29L31/00
CPCB29C49/06B29C49/78B29C49/783B29K2067/003B29L2031/7158B29C2949/0715B29C49/08B29C49/28G05B13/024
Inventor A·德劳内
Owner SIDEL PARTICIPATIONS SAS