Liquid resin molding system
US-8939757-B2 · Jan 27, 2015 · US
Method and apparatus for injection molding of plastic materials
US10137622B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10137622-B2 |
| Application number | US-201815966340-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 30, 2018 |
| Priority date | Sep 8, 2014 |
| Publication date | Nov 27, 2018 |
| Grant date | Nov 27, 2018 |
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- Title
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- Abstract
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- First independent claim
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- CPC / IPC classifications
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Abstract
Official abstract text for this publication.
Injection molding of plastic materials by an apparatus comprising at least one injector including a valve pin displaceable in a controlled manner between a closed position and an open position by an electric rotary actuator. At least one step is provided of detecting the value of the torque developed by the electric rotary actuator when the valve pin is in the path from the closed position to the open position, and the torque value detected is used to pilot the molding process.
First claim
Opening claim text (preview).
What is claimed is: 1. An apparatus for injection molding of plastic material into a mold cavity, comprising a distributor of fluid plastic material under pressure connected to at least one injector including a valve pin displaceable between a closed position and an open position, wherein the valve pin is controllably operated by an electric rotary actuator, said apparatus being configured to detect a value of the torque developed by the electric rotary actuator at least when the valve pin is in a path from said closed position to said open position, and to employ the detected torque value to pilot a molding process. 2. The apparatus according to claim 1 , wherein at the end of the opening displacement, the valve pin is kept stationary during a packing step of the injected plastic material and then it returns to the closed position, said apparatus being configured to also detect the value of the torque developed by the electric rotary actuator during said packing step and/or during return of the valve pin to the closed position. 3. The apparatus according to claim 1 , further configured to carry out displacement of the valve pin from the closed position to the open position in a discontinuous fashion, with at least one temporary stop step of said valve pin at which said torque value is detected.
Assignees
Inventors
Classifications
- B29C45/2703Primary
Means for controlling the runner flow, e.g. runner switches, adjustable runners or gates · CPC title
- B29C45/18Primary
Feeding the material into the injection moulding apparatus {, i.e. feeding the non-plastified material into the injection unit} · CPC title
Holding, dwelling · CPC title
- B29C45/2806Primary
consisting of needle valve systems (B29C45/2896 takes precedence) · CPC title
Drive means therefor · CPC title
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- What does patent US10137622B2 cover?
- Injection molding of plastic materials by an apparatus comprising at least one injector including a valve pin displaceable in a controlled manner between a closed position and an open position by an electric rotary actuator. At least one step is provided of detecting the value of the torque developed by the electric rotary actuator when the valve pin is in the path from the closed position to t…
- Who is the assignee on this patent?
- Inglass Spa
- What technology area does this patent fall under?
- Primary CPC classification B29C45/2703. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 27 2018 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).