Heating device for temperature conditioning of preforms, and method for operating heating device of this kind
A technology of heating equipment and operating status, which is applied in the field of heating equipment, and can solve problems such as the inability to have a temperature characteristic curve and the inability to have a temperature in a parison
Active Publication Date: 2020-05-01
KHS GMBH
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- Description
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Problems solved by technology
[0023] A disadvantage of the above-described control of the heating device in the start-up phase is that the parisons coming out of the heating device cannot yet have a very uniform temperature and still cannot have a very uniform temperature profile, because the power values for the heating elements The fixed setting of the can only be an average value suitable for the start-up phase
Method used
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[0046] exist figure 1 The structure of the molding machine 10 known in principle from the prior art is shown in . The illustration shows a preferred configuration of such a forming machine 10 of the rotary machine type with a rotating working wheel 110 carrying a plurality of forming stations 16 . For the sake of simplification of the illustration, of course only one such forming station 16 is shown. The schematically indicated parisons 14 , also referred to as preforms, are fed continuously by a feeding device 112 to a heating device 116 using a transfer wheel 114 . In the region of the heating installation 116 (which is also called a furnace and in which the parisons 14 are conveyed along the heating section and thermally conditioned there) the parisons 14 can be heated according to the application, for example With its mouth section 22 it is conveyed vertically upwards or vertically downwards. The heating device 116 is equipped, for example, with heating devices 118 whic...
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The invention relates to a method for operating a heating device (116) for the temperature conditioning of preforms (14) made of a thermoplastic material in the heating device (116). By means of the thermal conditioning in the heating device (116), a perform (14) is prepared for a subsequent forming process in which the preform (14) is formed into a container (12) with a forming fluid fed at pressure into the preform (14), the heating device (116) being operated in a plurality of operating states, specifically at least in a first and in a second operating state. The heating device (116) is operated in the second operating state for a start-up phase of the heating device (116), in which the temperature of the heating device (116) approaches an equilibrium temperature of a thermodynamicallystable equilibrium state of the heating device (116), and the heating device (116) is operated in the first operating state for continuous operation of the heating device (116) following on from the start-up phase. The heating device is characterized in that, in the second operating state, the heating device (116) is operated with a heating output value that varies over time. The invention also relates to a heating device and to a machine comprising a heating device that are designed to work each in accordance with the method.
Description
technical field [0001] The invention relates to a method for operating a heating device for temperature regulation of parisons made of thermoplastic material according to the preamble of claim 1 . The invention also relates to a heating device for temperature regulation of parisons according to the preamble of claim 8 . Finally, the invention relates to a machine for manufacturing containers from parisons according to the preamble of claim 9 . Background technique [0002] It is known to manufacture containers by a blow molding process from parisons made of thermoplastic material, for example polyethylene terephthalate (polyethylene-terephthalate), wherein the parisons are inside the blow molding machine Supply to different processing stations (DE43 40 291 A1). Typically, the blow molding machine has a heating device for the temperature regulation (or thermal adjustment) of the parison and has a blow molding device with at least one blow molding station, in the region of w...
Claims
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IPC IPC(8): B29C49/64B29C49/78B29C49/68B29C49/46B29C35/08B29K67/00B29K23/00
CPCB29K2023/06B29K2023/12B29K2067/003B29C49/6418B29C49/6454B29C49/68B29C49/786B29C2035/0822B29C2049/465B29C49/78B29C49/6462B29C49/648B29C49/6436
Inventor D·乌卢蒂尔克D·菲尔绍B·齐默林
Owner KHS GMBH