CN-224210444-U - Ejector sleeve ejection structure

CN224210444UCN 224210444 UCN224210444 UCN 224210444UCN-224210444-U

Abstract

The utility model relates to a barrel ejection structure which comprises an A plate and a thimble plate which are overlapped, wherein a KO hole is formed in the A plate, a push rod penetrating into the KO hole is arranged at the lower end of the thimble plate, a containing cavity is formed in the thimble plate, a movable block capable of moving up and down is arranged in the containing cavity, an elastic reset piece is arranged between the lower end of the movable block and the inner bottom surface of the containing cavity, a barrel sleeve and a limiting lug are respectively fixedly arranged on the upper surface of the thimble plate, a barrel inner needle and a movable needle are respectively fixedly arranged on the movable block, the upper ends of the barrel inner needle and the movable needle respectively penetrate out of the upper surface of the thimble plate, the upper end of the barrel inner needle also penetrates into the barrel sleeve, and in an initial state, the upper end face of the movable needle is higher than the upper end face of the limiting lug.

Inventors

FAN ZHIKANG
Zhong Yangneng
CHEN LINMING
ZHOU YONGLIN
YIN JIANMING

Assignees

深圳亿和模具制造有限公司

Dates

Publication Date: 20260508
Application Date: 20250430

Claims (8)

1. A ejector sleeve ejection structure comprises an A plate and an ejector plate which are overlapped, wherein a KO hole is formed in the A plate, an ejector rod penetrating into the KO hole is arranged at the lower end of the ejector plate, the ejector sleeve ejection structure is characterized in that a containing cavity is formed in the ejector plate, a movable block capable of moving up and down is arranged in the containing cavity, an elastic reset piece is arranged between the lower end of the movable block and the inner bottom surface of the containing cavity, an ejector sleeve and a limiting lug are respectively fixedly arranged on the upper surface of the ejector plate, an ejector sleeve inner needle and a movable needle are respectively fixedly arranged on the movable block, the upper ends of the ejector sleeve inner needle and the movable needle respectively penetrate out of the upper surface of the ejector plate, and the upper end of the ejector sleeve inner needle also penetrates into the ejector sleeve, and in an initial state, the upper end face of the movable needle is higher than the upper end face of the limiting lug.
2. The ejector sleeve ejection structure of claim 1, wherein the ejector plate comprises an ejector pin base plate and an ejector pin panel which are overlapped, a groove is formed in the upper surface of the ejector pin base plate, the groove is matched with the lower surface of the ejector pin panel to form a containing cavity, the movable block is arranged in the groove, and the ejector pin is arranged at the lower end of the ejector pin base plate.
3. The ejector sleeve ejection structure of claim 2, wherein a convex column is arranged at the central position of the inner bottom surface of the groove, a first avoiding through hole corresponding to the convex column is further arranged on the movable block, and the convex column penetrates into the first avoiding through hole.
4. The ejector sleeve ejection structure according to claim 3, wherein the lower surface of the ejector pin base plate is provided with a mounting hole which is concave towards the inside of the convex column, and the upper end of the ejector pin is fixedly arranged in the mounting hole.
5. The ejector sleeve ejection structure of claim 2, wherein the lower surface of the movable block is provided with a mounting groove, the mounting groove is detachably connected with the mounting block, the movable needle is fixedly arranged on the mounting block, and the upper end of the movable needle penetrates through the movable block from the inner top surface of the mounting groove and penetrates out of the upper surface of the ejector sleeve panel.
6. The ejector sleeve ejection structure according to claim 5, wherein the mounting block is provided with a fixing through hole, the movable needle is fixedly arranged in the fixing through hole, and the movable block is further provided with a second avoiding through hole for the upper end of the movable needle to penetrate.
7. The ejector sleeve ejection structure according to claim 6, wherein a third avoidance through hole corresponding to the second avoidance through hole is further formed in the ejector pin panel, the upper end of the movable needle further penetrates out of the third avoidance through hole, a fourth avoidance through hole corresponding to the second avoidance through hole is further formed in the inner bottom surface of the groove, and the lower end of the movable needle penetrates into the fourth avoidance through hole.
8. The ejector sleeve ejection structure according to any one of claims 2-7, wherein a first positioning groove is further formed in the lower surface of the movable block, a second positioning groove corresponding to the first positioning groove is further formed in the inner bottom surface of the groove, the upper end of the elastic reset piece is abutted to the first positioning groove, and the lower end of the elastic reset piece is abutted to the second positioning groove.

Description

Ejector sleeve ejection structure Technical Field The utility model relates to the technical field of injection molds, in particular to a ejector sleeve ejection structure. Background In the technical field of injection molds, ejection of a BOSS column is an important link, and relates to smooth demolding and quality of products. The KO hole is a hole for installing a top stick, the top stick is used for ejecting a product from a die in the injection molding process, the KO hole is required to be aligned with the top stick, otherwise ejection imbalance is caused, and the quality of the product and the service life of the die are affected. The use of a driver and a stick differs, for example, in that for deeper columnar structures, the use of a stick may not provide sufficient ejection force or may easily cause product deformation during ejection. At this time, ejection of the ejector sleeve is particularly important. The ejector sleeve can provide larger ejection force during ejection, and the ejection force is distributed more uniformly, so that deformation of a product is avoided. Considering the problem of ejection force at the KO hole, the barrel needs to be positioned above the KO hole, but the prior die is generally complex in internal layout, so that the barrel cannot be normally placed in most cases, and the purpose of ejecting a product through the barrel is difficult to realize. Therefore, when the ejection position of the BOSS column of the product is limited and no other ejection is effective, a novel ejector sleeve ejection structure needs to be designed. Disclosure of utility model The technical problem to be solved by the utility model is to provide a ejector sleeve ejection structure aiming at the defects in the prior art. The ejector sleeve ejection structure comprises an A plate and an ejector pin plate which are overlapped, wherein a KO hole is formed in the A plate, an ejector pin penetrating into the KO hole is arranged at the lower end of the ejector pin plate, a containing cavity is formed in the ejector pin plate, a movable block capable of moving up and down is arranged in the containing cavity, an elastic reset piece is arranged between the lower end of the movable block and the inner bottom surface of the containing cavity, an ejector sleeve and a limiting lug are respectively and fixedly arranged on the upper surface of the ejector pin plate, an ejector sleeve inner needle and a movable needle are respectively and fixedly arranged on the movable block, the upper ends of the ejector sleeve inner needle and the movable needle respectively penetrate out of the upper surface of the ejector pin plate, the upper end of the ejector sleeve inner needle also penetrates into the ejector sleeve, and in an initial state, the upper end face of the movable needle is higher than the upper end face of the limiting lug. In some embodiments, the ejector pin plate comprises an ejector pin bottom plate and an ejector pin panel which are overlapped, a groove is formed in the upper surface of the ejector pin bottom plate, the groove is matched with the lower surface of the ejector pin panel to form a containing cavity, the movable block is arranged in the groove, and the ejector pin is arranged at the lower end of the ejector pin bottom plate. In some embodiments, a convex column is arranged at the central position of the inner bottom surface of the groove, a first avoidance through hole corresponding to the convex column is further arranged on the movable block, and the convex column penetrates into the first avoidance through hole. In some embodiments, the lower surface of the thimble bottom plate is provided with a mounting hole which is concave towards the inside of the convex column, and the upper end of the ejector rod is fixedly arranged in the mounting hole. In some embodiments, the lower surface of movable block is equipped with the mounting groove, can dismantle in the mounting groove and be connected with the mounting block, the movable needle sets firmly on the mounting block, the upper end of movable needle passes the movable block from the interior top surface of mounting groove and wears out the upper surface of thimble panel. In some embodiments, the mounting block is provided with a fixed through hole, the movable needle is fixedly arranged in the fixed through hole, and the movable block is also provided with a second avoiding through hole for the upper end of the movable needle to pass through. In some embodiments, the thimble panel is further provided with a third avoidance through hole corresponding to the second avoidance through hole, the upper end of the movable needle further penetrates out of the third avoidance through hole, the inner bottom surface of the groove is further provided with a fourth avoidance through hole corresponding to the second avoidance through hole, and the lower end of the movable needle penetrates into the fourth avoidance through hole. In some embodim