Method of injection molding with down cavity detection
US-2021387393-A1 · Dec 16, 2021 · US
Method of injection molding with down cavity detection
US12090697B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12090697-B2 |
| Application number | US-202318211953-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 20, 2023 |
| Priority date | Jun 15, 2020 |
| Publication date | Sep 17, 2024 |
| Grant date | Sep 17, 2024 |
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Abstract
Official abstract text for this publication.
A method of detecting and compensating for a non-operational mold cavity in an injection molding apparatus having a plurality of mold cavities and an injection molding screw or ram includes injecting, via the injection molding screw or ram, a molten thermoplastic material into the plurality of mold cavities. The method includes measuring a first process parameter of the injection molding apparatus at a pre-determined time during or after the injecting. The method also includes determining, based on the first process parameter, whether one or more mold cavities of the plurality of mold cavities are non-operational. Then, when it is determined that one or more mold cavities are non-operational, the method includes automatically adjusting the first process parameter or a second process parameter of the injection molding apparatus.
First claim
Opening claim text (preview).
We claim: 1. A method of detecting and compensating for a non-operational mold cavity in an injection molding apparatus having a plurality of mold cavities and an injection molding screw or ram, the method comprising: injecting, via the injection molding screw or ram, a molten thermoplastic material into the plurality of mold cavities; measuring a first process parameter of the injection molding apparatus at a pre-determined time during or after the injecting, comprising measuring a nozzle pressure of an injection nozzle of the injection molding apparatus via a sensor disposed in the injection molding apparatus; based on the first process parameter, determining whether one or more mold cavities of the plurality of mold cavities are non-operational; and when it is determined that one or more mold cavities are non-operational, automatically adjusting the first process parameter or a second process parameter of the injection molding apparatus. 2. The method of claim 1 , further comprising: comparing the measured nozzle pressure to an expected nozzle pressure corresponding to all of the plurality of mold cavities being operational; and when a difference between the measured nozzle pressure and the expected nozzle pressure is greater than a predetermined threshold, generating a signal indicative of at least one mold cavity of the plurality of mold cavities being non-operational. 3. The method of claim 1 , wherein the sensor is disposed proximate the injection nozzle. 4. A method of detecting and compensating for a non-operational mold cavity in an injection molding apparatus having a plurality of mold cavities and an injection molding screw or ram, the method comprising: injecting, via the injection molding screw or ram, a molten thermoplastic material into the plurality of mold cavities; measuring a first process parameter of the injection molding apparatus at a pre-determined time during or after the injecting, comprising measuring a cushion of the molten thermoplastic material, measured from a front of the injection molding screw or ram to an end of a barrel of the injection molding apparatus; based on the first process parameter, determining whether one or more mold cavities of the plurality of mold cavities are non-operational; and when it is determined that one or more mold cavities are non-operational, automatically adjusting the first process parameter or a second process parameter of the injection molding apparatus. 5. The method of claim 4 , further comprising: comparing the measured cushion to an expected cushion corresponding to all of the plurality of mold cavities being operational; and when a difference between the measured cushion and the expected cushion is greater than a predetermined threshold, generating a signal indicative of at least one mold cavity of the plurality of mold cavities being non-operational.
Assignees
Inventors
Classifications
compare with thresholds · CPC title
Detecting defective moulding conditions (B29C45/84 takes precedence) · CPC title
screw · CPC title
Velocity · CPC title
Position · CPC title
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Frequently asked questions
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- What does patent US12090697B2 cover?
- A method of detecting and compensating for a non-operational mold cavity in an injection molding apparatus having a plurality of mold cavities and an injection molding screw or ram includes injecting, via the injection molding screw or ram, a molten thermoplastic material into the plurality of mold cavities. The method includes measuring a first process parameter of the injection molding appara…
- Who is the assignee on this patent?
- Imflux Inc
- What technology area does this patent fall under?
- Primary CPC classification B29C45/77. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 17 2024 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).