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Method for manufacturing plastic containers by blow moulding

A container, pre-blowing technology, used in liquid bottling, household components, applications, etc., to solve problems such as insufficient production to ensure proper quality

Active Publication Date: 2019-03-15
SIDEL PARTICIPATIONS SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, these technical solutions do not appear to be sufficient to guarantee a suitable quality of production when the rate varies, and in particular to prevent containers of bad shape or of different dimensions from each other from getting stuck in the production line without producing a stop of the production line, or even changing Quality or quantity of production suitable for customers and / or final consumers

Method used

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  • Method for manufacturing plastic containers by blow moulding
  • Method for manufacturing plastic containers by blow moulding
  • Method for manufacturing plastic containers by blow moulding

Examples

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Embodiment Construction

[0045] figure 1 A container 2 manufacturing machine 1 is shown which blows or stretch blows blanks 3 (usually preforms, although they can also be intermediates) of thermoplastic material such as polyethylene terephthalate. container) to make a container, such as a bottle or a flask.

[0046] The manufacture of container 2 consists of two main stages:

[0047] - Prefabrication of a tubular blank 3 from plastic material in an injection mold (not shown);

[0048] - Then, in the mold 6 of the blowing or stretch-blow unit 5 of the machine 1, a compressed gas such as air is injected into the interior of the preheated blank 3; the material is then stretched, against the cavity and fit the shape of model 6 (see image 3 , wherein the blank 3 indicated by the dashed line changes towards the container 2 indicated by the solid line).

[0049] The mold 6 is then opened and the container 2 exits the blowing unit 5 .

[0050]During the first phase, the first stage consists of heating t...

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Abstract

The invention concerns a method for forming blanks (3) made from plastic material into containers (2), the method including steps of blowing into the blanks in such a way as to form them into containers, then internally degassing the formed containers, characterised in that: - said steps are carried out according to a first cycle at a first rate, then, - during a second subsequent cycle of steps carried out at a second rate slower than the first rate, a time delay is added with respect to the first cycle, during or after degassing, such that the second cycle lasts longer than the first.

Description

technical field [0001] The invention relates to the manufacture of containers of plastics material, such as bottles of polyethylene terephthalate (PET), from blanks. [0002] The present invention therefore relates to a method for converting blanks, generally preforms, of plastics material into containers. Background technique [0003] The method according to the invention comprises a cycle of steps comprising at least the step of injecting a pressurized blowing fluid, usually air, into the blank in order to transform the blank into a container, followed by making the formed container Step for internal degassing. [0004] To form these containers, blow molding machines (also known as blow molding machines or blow molding machines, or stretch blow molding machines) are generally used, provided with a series of blowing stations or stretch blow molding stations, comprising The surrounding forming model. [0005] In the prior art, such blow molding machines generally operate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/42B29C49/78B29C49/06B29C49/36B29C49/58B29K67/00B29L31/00
CPCB29L2031/7158B29K2067/003B29C49/06B29C49/36B29C49/42B29C49/78B29C2049/5827B29C49/42802B29C49/42808B29C2949/0715B29C49/46B29C49/6418B67C3/22B67C7/00B67C2003/227
Inventor A·德劳内H·帕斯基耶
Owner SIDEL PARTICIPATIONS SAS
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