Method and device for producing plastic preforms and plastic containers with hot preform reservoirs

Abstract

The invention relates to a method for operating a plant for producing plastic preforms and plastic containers, comprising at least one injection molding machine and a blow molding machine, in which the plastic preforms are injection-molded, in which the plastic containers are formed, and from which the plastic preforms are fed to the blow molding machine, a heating device is arranged downstream of the injection molding machine, and the injection molding machine is connected with the blow molding machine. According to the invention, the plastic preforms produced in the injection molding machine are transferred directly after production to a hot preform reservoir, which holds the plastic preforms at a predetermined temperature, the speed and / or a parameter of at least one subsequent processing device being variable.

Description

Technical field [0001] The present invention relates to a method of producing a device of a plastic preform and a plastic container and a device for producing plastic preforms and plastic containers. Background technique [0002] Such equipment and methods have long known in the prior art. From the applicant's internal prior art, the plastic preform is first produced by an injection molding process, and then temporarily stored in the form of a bulk material until further processing is further processed. For further processing, the preform is then sent to a preform sorting device as a bulk material, and the heating device and subsequent blow molding machine are sent in an ordered form, and the plastic preform is formed into a plastic container. [0003] The above two-step tensile blow molding process is characterized in that the preform production process and the stretch blow mold or the molding process are separated from each other. However, the disadvantage is that the first ste...

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Problems solved by technology

[0005] However, the problem with this coupled approach (preform production incorporated into the filling operation) is that due to the limited control process of IR linear oven technology, it is necessary to ensure a uniformity of + / - 1°C between successive preforms. Preform inlet temperature, and fluctuations greater than + / - 5°C over an extended period of time (daily fluctuations) can lead to loss of processing window

Therefore, it is almost impossible to use the first heat of injection molding (60°C) because even the slight pauses (<5 minutes) that often occur in the filling line cannot be compensated, and the temperature of the preform drops too much, beyond process limit

[0006] If such a standstill occurs, for example, the preforms cool over time on the non-tempering conveyor section between the injection molding machine and the heating device located before the blow molding machine, and it is impossible to guarantee a uniform preform inlet temperature or Necessary preform energy content in the heating unit

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