Apparatus and method for controlling temperature gradient through wall thickness of container
US-9221223-B2 · Dec 29, 2015 · US
Container production method by liquid blow molding
US10974438B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10974438-B2 |
| Application number | US-201716077679-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 23, 2017 |
| Priority date | Mar 31, 2016 |
| Publication date | Apr 13, 2021 |
| Grant date | Apr 13, 2021 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A container production method by liquid blow molding. The method includes a pushing step in which a liquid is collected from a preform at the timing at which the pressure inside of the preform starts rising by pushing of the expanded and deformed preform by a movable mold portion of a blow molding mold so that the rise in the pressure is suppressed or prevented.
First claim
Opening claim text (preview).
The invention claimed is: 1. A container production method by liquid blow molding in which a pressurized liquid is supplied into a resin preform to mold the preform into a container of a shape conforming to an inner surface of a cavity of a blow molding mold, wherein, as the blow molding mold, one having a body mold portion that forms a part of the inner surface of the cavity and a movable mold portion that forms another part of the inner surface of the cavity is used, the method comprising: an expansion and deformation step in which a pressurized liquid is supplied into the preform disposed in the body mold portion to expand and deform the preform; and a pushing step in which the movable mold portion is moved relative to the body mold portion toward the expanded and deformed preform so that the expanded and deformed preform is pushed into the container for molding by the movable mold portion, wherein: in the expansion and deformation step, the liquid is collected from inside the expanded and deformed preform at a timing at which a pressure inside of the expanded and deformed preform starts rising by the movable mold portion's push so that the rise in the pressure is suppressed or prevented. 2. The container production method by liquid blow molding according to claim 1 , wherein in the expansion and deformation step, the pressurized liquid is supplied into the preform by moving a plunger in a pressurizing direction, and in the pushing step, the liquid is collected from inside the expanded and deformed preform by moving the plunger in a pressure reducing direction. 3. The container production method by liquid blow molding according to claim 1 , wherein a bottom portion or a handle portion of the container is formed by the movable mold portion. 4. The container production method by liquid blow molding according to claim 2 , wherein a bottom portion or a handle portion of the container is formed by the movable mold portion. 5. The container production method by liquid blow molding according to claim 2 , wherein a negative pressure is generated by the plunger such that the liquid is drawn from inside the expanded and deformed preform.
Assignees
Inventors
Classifications
Stretching rods · CPC title
- B29C49/46Primary
characterised by using particular environment or blow fluids other than air · CPC title
by squeezing the container elastically · CPC title
and subsequently lowering the counterpressure · CPC title
having a recessed undersurface · CPC title
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Frequently asked questions
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- What does patent US10974438B2 cover?
- A container production method by liquid blow molding. The method includes a pushing step in which a liquid is collected from a preform at the timing at which the pressure inside of the preform starts rising by pushing of the expanded and deformed preform by a movable mold portion of a blow molding mold so that the rise in the pressure is suppressed or prevented.
- Who is the assignee on this patent?
- Suyama Kenichi, Okuyama Yuichi, Yoshino Kogyosho Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B29C49/46. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 13 2021 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).