Preform extrusion molding apparatus, method for extrusion molding and preform
US-9956707-B2 · May 1, 2018 · US
Method of injection molding preform
US12420985B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12420985-B2 |
| Application number | US-202318174945-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 27, 2023 |
| Priority date | Jun 28, 2013 |
| Publication date | Sep 23, 2025 |
| Grant date | Sep 23, 2025 |
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- Title
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Abstract
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A method of injection molding a test tube-shaped preform for biaxial stretch blow molding includes supplying a major material resin from outer and inner flow paths to a combined flow path for a predetermined time and rate. For a period of time within a range of the predetermined time period during which the major material resin is supplied, the intermediate layer resin is simultaneously supplied from the middle flow path to the combined flow path at a second predetermined supplying rate. A columnar laminated molten resin is injected into a cavity of a metal mold connected to a tip of the nozzle through a gate to fill the cavity, the columnar laminated molten resin being composed of the major material resin and the intermediate layer resin formed in the major material resin in a laminated manner that are combined into a columnar shape at the combined flow path.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of injection molding a test tube-shaped preform for biaxial stretch blow molding, the preform comprising: a transparent base layer; a circumferential wall formed of the transparent base layer; and a light-blocking or opaque intermediate layer formed in the base layer in a laminated manner over an area of a predetermined height of the circumferential wall, wherein the intermediate layer is formed in a laminated manner over an area cove…
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Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US12420985B2 cover?
- A method of injection molding a test tube-shaped preform for biaxial stretch blow molding includes supplying a major material resin from outer and inner flow paths to a combined flow path for a predetermined time and rate. For a period of time within a range of the predetermined time period during which the major material resin is supplied, the intermediate layer resin is simultaneously supplie…
- Who is the assignee on this patent?
- Yoshino Kogyosho Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B29B11/08. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 23 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).