Device to adjust the linear position of a shutter

Patent metadata

Field	Value
Publication number	US-11420370-B2
Application number	US-201917259586-A
Country	US
Kind code	B2
Filing date	Jul 10, 2019
Priority date	Jul 12, 2018
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

A device is described for adjusting the linear position of one or more shutters (20) in an injection moulding system. The device comprises a body, comprising a cavity in which there can axially slide a movable element, and an adjustment element for adjustment of the axial position of the body with respect to a plate. The adjustment element is rotatably mounted between the body and the plate and comprises a threaded portion on which a corresponding thread of the body and/or of the plate is engaged.

First claim

The invention claimed is:

1. A device for adjusting the linear position of one or more shutters in an injection moulding system, wherein the one or more shutters can open and/or close a molten-fluid supply channel towards one or more mould cavities by translating along an axis, the device comprising:
a body comprising a cavity in which there can slide axially a movable element, to which the one or more shutters can be fixed;
a fixed support plate,
an adjustment element for adjustment of the axial position of the body,
wherein the adjustment element is rotatably mounted between the body and the fixed support plate,
is connected to the body and to the fixed support plate so that it can be rotated clockwise and/or counter-clockwise so as to move linearly parallel to said axis in order to define the position of the body along said axis,
and comprises a threaded portion on which a corresponding thread of the body and of the fixed support plate is engaged.

2. The device according to claim 1 , wherein the adjustment element is mounted in a screwable manner in the fixed support plate and can be screwed clockwise and/or counter-clockwise inside the fixed support plate to move linearly and define an axial position of the body, the body and the fixed support plate comprising said corresponding thread on which the adjustment element is simultaneously engaged with said threaded portion of its own.

3. The device according to claim 1 , wherein the threaded portions and the corresponding threads are concentric to said axis.

4. The device according to claim 1 , wherein the body comprises an externally threaded male portion which protrudes along said axis from an end of the body, on the male portion being present said corresponding thread engaged by said threaded portion provided in a complementary female portion of the adjustment element.

5. The device according to claim 1 , wherein the adjustment element comprises threads formed on an external and internal side wall thereof.

6. The device according to claim 5 , wherein said threaded inner side wall belongs to a pass-through or blind opening.

7. The device according to claim 1 , comprising blocking means for blocking the adjustment element with respect to the fixed support plate and/or the body.

8. The device according to claim 7 , wherein the blocking means are mounted on the adjustment element.

9. The device according to claim 8 , wherein the adjustment element comprises deformable portions able to be pushed with pressure against the fixed support plate and/or the body to block the adjustment element relative to the fixed support plate and/or the body.

10. The device according to claim 1 , wherein the body comprises a female portion on which said corresponding thread is provided and engaged by said corresponding threaded portion present in a complementary male portion of the adjustment element.

11. The device according to claim 7 , wherein the blocking means are mounted on the fixed support plate.

12. The device according to claim 7 , wherein the fixed support plate comprises deformable portions able to be pushed with pressure against the adjustment element to block it.

13. The device according to claim 7 , wherein the fixed support plate comprises blocking elements able to be pushed against the adjustment element to block it.

14. The device according to claim 8 , wherein the adjustment element comprises two concentric threaded rings that are axially spaced apart and able to be spread apart and pressed with pressure against a corresponding thread of the fixed support plate and/or body.

15. The device according to claim 14 , wherein the two concentric threaded rings are equal and/or of equal diameter.

Assignees

• Inglass Spa

Inventors

• De Nadai Massimo
• Rossi Massimo
• Bisetto Massimo

Classifications

• B29C45/28 Primary

  Closure devices therefor · CPC title

• B29C2045/2848

  having an adjustable stroke length · CPC title