抽芯机构

Abstract

一种抽芯机构，用于模具中，包括镶块、抽芯组件和锁模组件。抽芯组件包括第一芯块、第二芯块和驱动结构，第一芯块和第二芯块均转动连接于镶块，第一芯块、第二芯块及镶块合围形成用于成型倒扣的型腔，第一芯块插入至倒扣的外部，第二芯块插入至倒扣的内部，第一芯块上设有锁槽；锁模组件，包括导向件和锁止件，导向件倾斜插入至锁止件内并与锁止件滑动连接，导向件驱动锁止件插入至锁槽内，以为第一芯块提供向上的支撑力。本申请中，第一芯块从倒扣的外部脱离，第二芯块从倒扣的内部脱离，并通过锁模组件的导向件与锁止件配合，在合模时为第一芯块提供向上的支撑力，避免第一芯块位移导致的封胶跑飞边问题，提高产品合格率。

Claims

1. A core-drawing mechanism for use in a mold, characterized by, include: Inlay; The core-pulling assembly includes a first core block, a second core block, and a driving structure. The first core block and the second core block are rotatably connected to the insert. The first core block, the second core block, and the insert together form a cavity for forming an undercut. The first core block is inserted into the outside of the undercut, and the second core block is inserted into the inside of the undercut. The first core block is provided with a locking groove. A locking assembly includes a guide and a locking member. The guide is obliquely inserted into the locking member and slidably connected to the locking member. The guide drives the locking member to be inserted into the locking groove to provide an upward support force for the first core block. When the mold opens, the driving structure drives the first core block and the second core block to rotate, so that the first core block disengages from the outside of the undercut, the second core block disengages from the inside of the undercut, and the guide drives the locking member to disengage from the locking groove.

2. The core-drawing mechanism of claim 1, wherein The drive structure extends and retracts along a first direction to drive both the first core block and the second core block to rotate around a first rotating shaft. The first rotating shaft extends along a second direction. The locking member moves along a third direction to insert into or disengage from the locking groove. The first direction, the second direction, and the third direction are perpendicular to each other.

3. A core-drawing mechanism according to claim 2, wherein The first rotating shaft is disposed on the insert, the first core block includes a connecting part and an arc-shaped protrusion disposed on the connecting part, the arc-shaped protrusion is inserted into the outside of the buckle, the locking groove is disposed on the connecting part, the connecting part is provided with a second rotating shaft, the first rotating shaft and the second rotating shaft are arranged parallel to each other, and the second rotating shaft is connected to the drive structure; In the first direction, the locking groove is located between the arc-shaped protrusion and the second rotating shaft.

4. A core-drawing mechanism according to claim 3, wherein The core-pulling mechanism includes an upper template and a lower template, the insert is disposed on the lower template, the guide is disposed on the upper template, and the locking member is slidably disposed on the lower template; When the mold opens, the upper template moves the guide component upwards in sync, and the guide component drives the locking component to slide away from the first core block, so that the locking component disengages from the locking groove.

5. A core-drawing mechanism according to claim 4, wherein The lower template is provided with a slide rail, and the locking member includes a connected slider and a locking tongue. The slider is slidably disposed on the slide rail, and the guide member is inserted into the slider.

6. A core-drawing mechanism according to claim 5, wherein The locking tongue includes a main body and a locking part. The locking part is connected to one end of the main body in the third direction. In a cross section perpendicular to the third direction, the area of ​​the locking part gradually decreases from the end closer to the main body to the end farther away from the main body.

7. The core-drawing mechanism of claim 4, wherein The driving structure includes a driving component, a first connecting rod, and a second connecting rod, wherein one end of the first connecting rod and one end of the second connecting rod are both connected to the output end of the driving component; The second core block is provided with a third rotating shaft, and the other end of the first connecting rod is rotatably connected to the second rotating shaft, and the other end of the second connecting rod is rotatably connected to the third rotating shaft.

8. A core-drawing mechanism according to claim 7, wherein The driving structure further includes a hinge seat, and the driving component includes a driving cylinder and a piston rod. The driving cylinder is disposed on the lower template, one end of the piston rod is telescopically connected to the driving cylinder, and the other end of the piston rod is connected to the hinge seat. One end of the first connecting rod and one end of the second connecting rod are rotatably connected to the hinge seat.

9. The core-drawing mechanism of claim 2, wherein The core-pulling mechanism further includes a third core block, which is disposed on the insert and abuts against the second core block.

10. A core-drawing mechanism according to claim 9, wherein The third core block is provided with an arc-shaped groove, which is arranged circumferentially around the first rotating shaft, and the second core block is disposed in the arc-shaped groove.

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