Method of thermal crystallization treatment for cylindrical mouthpart of preform

A treatment method and preform technology, which is applied in the field of thermal crystallization treatment, can solve problems such as the discrepancy between the size of the bottle mouth and the design value, and achieve the effect of preventing irregular deformation and preventing deformation

Inactive Publication Date: 2006-09-27
YOSHINO KOGYOSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, when the preform is thermally crystallized using the above-mentioned inverted transfer jig, the size of the mouth part does not match the design value.

Method used

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  • Method of thermal crystallization treatment for cylindrical mouthpart of preform
  • Method of thermal crystallization treatment for cylindrical mouthpart of preform
  • Method of thermal crystallization treatment for cylindrical mouthpart of preform

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Experimental program
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Embodiment Construction

[0043] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0044] figure 1 Shown is the first example of the jig used in the present invention for the thermal crystallization treatment of the neck portion of the preform made of PET resin. Sectional front view.

[0045] The jig 11 has the following structure: a top-cylindrical jig base 12 is assembled on the conveying device omitted in the figure, and the supporting body 13 is erected from the center of the top surface of the jig base 12 along the central axis. set up. In the first example, the support body 13 includes: a support base 14 that is screwed on the fixture base 12; a support rod 15 that is screwed on the support base 14; Combined with the front hemispherical portion 16 on the support rod 15, the double nuts 16a can adjust the overall height of the support body 13.

[0046] From figure 1 It can be judged that in the state where the preform 1 is p...

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Abstract

A method of thermal crystallization treatment by means of an inverted conveyance type jig, by which a cylindrical mouthpart of preform with high dimensional accuracy can be obtained; a process of thermal crystallization treatment for a cylindrical mouthpart, conducted in high productivity; and a process of biaxially stretching blow molding. There is provided a method of while mounting a preform of synthetic resin for biaxially stretching blow molding on an inverted conveyance type jig, conducting thermal crystallization treatment of a cylindrical mouthpart thereof, wherein the thermal crystallization treatment is carried out while having, fitted on the jig, a preform with a gap provided under the top plane of the cylindrical mouthpart of the preform.

Description

technical field [0001] The present invention relates to a thermal crystallization treatment method for the mouth portion of a preform made of synthetic resin. Background technique [0002] In Japanese Patent Application Publication No. 10-058527 (Patent Document 1), it is described a 2-axis stretch blow molding bottle made of polyethylene terephthalate (hereinafter referred to as PET) resin, which is used for holding High-temperature filled or heat-treated sterilized products, such as tea or juice drinks, etc. For synthetic resin bottles for tea or juice products that require high-temperature filling (80-90 degrees Celsius) or heat treatment, we use a so-called heat-resistant finish, which is a resin modified by thermal crystallization The heat deformation resistance of the bottle mouth. Japanese Patent Publication No. 61-24170 (Patent Document 2) describes a method of thermal crystallization treatment. [0003] Figure 5 It is an explanatory diagram of the thermal crysta...

Claims

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Application Information

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IPC IPC(8): B29C49/64B29C49/42B29C35/02B29K67/00B29L22/00B29C49/04B29C71/00
CPCB29B2911/14133B29B2911/1404B29K2995/0041B29B2911/14106B29B2911/1402B29B2911/14033B29C49/04B29C71/0063B29B2911/14026B29C49/64B29C2949/3024B29C2949/26B29C2949/28B29C2949/24B29C2949/22B29C2949/3032B29C49/6452B29C35/02B29C49/6418B29K2067/003
Inventor 饭村好宏小室利行南木出上杉大辅
Owner YOSHINO KOGYOSHO CO LTD
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