Hole checking method of blow molding article or other plastic hollow body

A technology of blow molding and inspection method, which is applied in the direction of measuring the acceleration and deceleration rate of fluid, analyzing materials, and using liquid/vacuum degree for liquid tightness measurement, which can solve the problems of low precision of small holes and inability to detect pores, Achieving the effect of excellent safety

Inactive Publication Date: 2007-06-06
KYORAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a method, although the small hole detection method has been used in the automatic blow molding process from the past, the accuracy of the small hole detection is low, especially the tiny air holes cannot be detected.

Method used

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  • Hole checking method of blow molding article or other plastic hollow body
  • Hole checking method of blow molding article or other plastic hollow body
  • Hole checking method of blow molding article or other plastic hollow body

Examples

Experimental program
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Embodiment Construction

[0035] Fig. 1 is a process explanatory diagram of the small hole inspection method of blow molded products according to the present invention, Fig. 2 is an explanatory diagram of the manufacturing process of the pressure fluid used in the small hole inspection method of blow molded products, and Fig. Explanatory diagram of the structure of the blow molding machine.

[0036]In Fig. 1, 1 is a conveyor belt, and the pressure fluid inlet hole of the flexible container 2 blow-molded by the blow molding machine is melted and closed in the blow molding machine, and is supplied to the conveyor belt 1 through the arrangement process 3, by Conveyor belt 1 conveys sequentially. The conveyor belt 1 is equipped with a top fixing jig 4 for supporting the top of the flexible container 2 and a bottom fixing jig 5 for supporting the bottom, and the unloaded flexible container 2 is held in a fixed posture by the top fixing jig 4 and the bottom fixing jig 5 . Blow molding in a blow molding mach...

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Abstract

The present invention provides a small hole inspection method of blow molded products, which is suitable for automatic blow molding process and can accurately detect the small holes of blow molded products with a very small amount of hydrogen in a very short time. This method is a method of sealing a blow-molded product blow-molded with a pressure fluid containing hydrogen, detecting hydrogen leaking to the outside when the sealed blow-molded product is squeezed from the outside, and determining whether the blow-molded product has pinholes. Melt and knead the synthetic resin and extrude the cylindrical parison from the extruder, then blow mold the parison in the mold with the pressure fluid containing hydrogen, take out the blow molded product from the mold, and seal the blow molding The pressurized fluid inlet hole at the time, by detecting the hydrogen leaking to the outside when the blow molded article with the pressure fluid inlet hole closed is squeezed from the outside, it is determined whether the blow molded article has small holes.

Description

technical field [0001] The present invention relates to a method for inspecting small holes in blow-molded products and other plastic hollow bodies, which use hydrogen to detect whether small holes are generated in blow-molded products. Background technique [0002] Blow-molded containers are expected to be kept in a closed state in addition to keeping their interior hygienic. In medical and food containers, the container is particularly required to be in a completely closed state. [0003] That is, in the past, even in medical and food containers, the leakage of the sealing part of the container cannot be detected at the level of 10ppm to 50ppm, so it has been allowed as a last resort. However, the current situation is that even a tiny hole Also considered a problem, requires leakage to be zero. [0004] The following method is known as a small hole detection method of a blow-molded container or the like: after the pressure fluid introduction hole generated during blow mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01M3/32
CPCB29C2049/4608
Inventor 小野泽英树鹫见武彦
Owner KYORAKU CO LTD
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