Control system of container forming unit including master control unit and slave controller
A technology of the main control unit and control system, applied in the direction of digital control, electrical program control, etc., can solve the problems of not easy to locate the cause of detection, not completely satisfactory decentralization, etc.
Active Publication Date: 2017-01-18
SIDEL PARTICIPATIONS SAS
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- Abstract
- Description
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- Application Information
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Problems solved by technology
[0013] However, such decentralization is not entirely satisfactory
In fact, each control system is independent and can produce deviations in the quality of the containers produced, the cause of which is not easily detected and positioned on the machine
Method used
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Embodiment Construction
[0043] exist figure 1 and figure 2 A container manufacturing plant 1 for manufacturing containers 2 from blanks 3 of thermoplastic material such as PET (polyethylene terephthalate) is schematically shown.
[0044] The plant 1 comprises at least two treatment units 4 , 9 of the containers 2 or blanks 3 . For the sake of simplicity, it is assumed in the following that the preform 3 is a preform.
[0045] Typically, as in the example, container manufacturing equipment includes:
[0046] - a heating unit 4 or furnace comprising a series of heating modules 5 each having a radiating wall 6 and a reflecting wall 8 equipped with a superimposed source of infrared radiation 7, the reflecting wall and The radiating walls 6 are arranged facing each other to reflect the part of the radiation not absorbed by the preform 3;
[0047] - a forming unit 9 for forming by blowing or stretch blowing, said forming unit being equipped with at least one forming station 10 (in this case a series o...
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Abstract
A control system (34) for a container forming unit (9) that forms a container (2) from a blank (3), the container forming unit is equipped with a series of forming positions (10), and each forming position is equipped with a mold (11), the control system (34) includes a master control unit (36) and a series of slave controllers (37), each of which is associated with at least one shaping position (10), each slave controlling The device (37) is programmed to: manage the associated forming position (10) according to a forming constant (CF) loaded into the slave controller (37); take into account pressure measurements in the mold (11) ; based on the measured values, establishing a blowing curve describing the variation of the fluid pressure in the mold (11); analyzing the blowing curve and extracting the coordinates of at least one singular point (S) from said blowing curve; reporting to the main control unit ( 36) Teleport singularity (S).
Description
technical field [0001] The present invention relates to the field of blank-formed containers made of thermoplastic material such as PET (polyethylene terephthalate), the term "preform" covering preforms from injection molding and which have undergone one or more temporary Intermediate container for forming operations. Background technique [0002] The forming of the container is carried out by blowing or stretch blowing from the blank which has been subjected to a preheating operation. The hot blank is fed into a mold with a container cavity; a pressurized fluid (particularly a gas such as air) is then injected into the blank to give the blank the shape of the container through the counter cavity in the mold. The rough blank can also be stretched by means of slide bars in order to minimize eccentricity and to homogenize the distribution of the material. [0003] Container forming on an industrial scale requires extremely short cycle times. With typical modern production c...
Claims
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IPC IPC(8): B29C49/78B29C49/12
CPCB29C49/783B29C49/36B29C49/6418B29C49/78B29C49/786B29C49/06B29C49/1232B29C2049/023B29C2049/4863B29C49/6845B29C2049/7861B29C2049/78675B29C2049/7878B29C2049/7879B29C2049/78805B29C2049/78815G05B19/18
Inventor T·多
Owner SIDEL PARTICIPATIONS SAS