EP0170594A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Injection molding method for multi-layer bottomed parisons
Assignee: Nissei ASB Machine Co Ltd
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Filing: 1985-07-29
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Granted: —
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Expires: 2005-07-29
Abstract
Abstract The present invention provides an injection molding method for a multi-layer bottomed parison comprising: using a triple nozzle concentrically comprising a first flowpassage in communication with a nozzle hole, a second flowpassage and a third flowpassage respectively opening to a distal end of the first flowpassage in the inside of the nozzle hole, forming an inner layer and an outer layer of a bottomed parison with a resin from the first flowpassage, and forming a bottomed parison having a five-layer or a four-layer in section comprising an intermediate layer and a center layer or two intermediate layers with resins from the second flowpassage and the third flowpassage.
Inventors
- 👤 Yoshinori Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 03:38
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/16; B29C45/1603; B29C45/1607; B29C45/164; B29C45/1642; B29C45/1643; B29C2949/00; B29C2949/30; B29C2949/3008; B29C2949/3009; B29C2949/3012; B29C2949/3016; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/303; B29C2949/3032; B29C2949/3034; B29C2949/3036; B29C2949/3038; B29K; B29K2077/00; B29K2105/00; B29K2105/25; B29K2105/253; B29K2995/00; B29K2995/0037; B29K2995/0068; B29K2995/0069
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
(1) An injection molding method for a multi-layer bottomed parison comprising: using a triple nozzle concentrically comprising a first flowpassage in communication with a nozzle hole, a second flowpassage and a third flowpassage respectively opening to a distal end of the first flowpassage in the inside of the nozzle hole, forming an inner layer and an outer layer of a bottomed parison with a resin from the first flowpassage, and forming a bottomed parison having a five-layer or a four-layer in section comprising an intermediate layer and a center layer or two intermediate layers with resins from the second flowpassage and the third flowpassage.
Claim 2
Dependent Claim
114 words
(2) An injection molding method for a multi-layer bottomed parison according to Claim 1 successively carrying out the steps of injection a predetermined quantity of a first molten resin from said first flowpassage into a cavity; injecting a predetermined quantity of a second molten resin from the second flowpassage to introduce it under pressure into the first molten resin and injecting said second molten resin together with the first molten resin; injecting a still another third molten resin from the third flowpassage to introduce it under pressure into the second molten resin and injecting said resin together with the first and second molten resins; and molding a bottomed parison having a five-layer in section.
Claim 3
Dependent Claim
84 words
(3) An injection molding method for a multi-layer bottomed parison according to Claim 1 carrying out the steps of injecting a predetermined quantity of a first molten resin from said first flowpassage into a cavity; injecting at about the same time the second molten resin and third molten resin different from each other from the second flowpassage and third flowpassage and introducing both the said resins together with the first molten resin under pressure whereby molding a bottomed parison having a four-layer in section.
Claim 4
Dependent Claim
30 words
(4) An injection molding method for a multi-layer bottomed parison according to Claims 1 and 2 wherein the resin from the second flowpassage forming an intermediate layer has an adhesiveness.
Claim 5
Dependent Claim
53 words
(5) An injection molding method for a multi-layer bottomed parison according to Claims 1, 2 and 3wherein the resin from the third flowpassage forming a center layer comprises a resin having a gas barrier property or a heat resisting property more than that of the resin from the first flowpassage forming a parison.
References Cited (Backward Citations)
No citation records indexed.
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