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Co-injection molded multilayer article with injection molded holes between gate area and surrounding edge

A technology of co-injection molding and products, which is used in the fields of beverages, medicines and health food containers, and food packaging, which can solve the problems of large gaps in coverage and interference with flow patterns.

Active Publication Date: 2019-09-20
CINCINNATI MILACRON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, however, when forming a multilayer co-injection molded article having one or more molded holes between the gate region and the surrounding region of the multilayer article, each hole forming region of the mold cavity interferes with the Flow patterns resulting in large gaps in the interior layer coverage downstream of each mold cavity

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  • Co-injection molded multilayer article with injection molded holes between gate area and surrounding edge
  • Co-injection molded multilayer article with injection molded holes between gate area and surrounding edge
  • Co-injection molded multilayer article with injection molded holes between gate area and surrounding edge

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Embodiment Construction

[0065] Exemplary embodiments include molds, apparatus, systems, and methods for co-injection molding resulting multilayer articles having a molded aperture between a gate region and a surrounding edge region of the article. The article has an inner layer of a first material, an outer layer of the first material, and an inner layer of a second material between the inner layer and the outer layer. During injection, the flow rates of the first material and the second material are adjusted close to the hole forming zone of the mould, so as to obtain a thickened inner layer covering the downstream of the hole. In some embodiments, the mold cavity has a hole forming zone and an acceleration zone adjacent to the hole forming zone. The velocity boost zone increases the flow velocity downstream of the hole when compared to a mold cavity with a hole forming zone but no velocity boost zone. In some embodiments, the inner layer coverage is at least 98% of the perimeter of the cross-secti...

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Abstract

The present invention discloses a method and system for co-injection molding a multilayer article having one or more molded holes located between a gate region and a surrounding region of the article. The article includes an inner layer positioned between the inner layer and the outer layer. An article having an interior layer coverage of greater than 98% of the perimeter of a cross-section of the article downstream of the one or more formed apertures. One method includes regulating the flow of liquid through a hole forming area of ​​a mold cavity to compensate for the drag of said hole forming area on the velocity of liquid flowing to said hole forming area.

Description

[0001] related application [0002] Pursuant to 35 USC 119(e), this application claims priority to US Provisional Application No. 61 / 931393, filed January 24, 2014, which is hereby incorporated by reference in its entirety. technical field [0003] Exemplary embodiments relate to methods and systems for forming multilayer plastic articles, such as containers for food, beverages, pharmaceuticals, and nutraceuticals. In particular, exemplary embodiments relate to methods and systems for co-injection molding a multilayer plastic article having a molded aperture formed between a gate region and a surrounding region of the article. Background technique [0004] Multilayer plastic products are commonly used as containers for food, beverages, medicines and health foods. Some multilayer plastic articles are commonly made from materials such as polyethylene (PET) and polypropylene (PP). Articles made from PET and PP are resistant to environmental degradation and are therefore dura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/16B29C45/00
CPCB29C45/0046B29C45/164B29C45/1642B29C45/2628B29C45/30B29K2101/12B29K2995/0067B29L2031/712B29L2031/7174Y10T428/24322Y10T428/24339Y10T428/24355B32B3/266B32B27/08B32B2250/03B32B2250/24B32B2439/70B32B2439/80
Inventor P·M·斯温森
Owner CINCINNATI MILACRON INC
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