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Ejecting rotation-proof assembly

An anti-rotation and ejection technology, which is applied in the field of ejection and anti-rotation combinations, can solve problems such as mold core damage, and achieve the effect of avoiding damage

Inactive Publication Date: 2009-01-21
MITAC PRECISION TECH(KUNSHAN) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the locking piece is loose during the ejection process, the top block will rotate freely. When the top block returns to its position again, the outer edge of the top block and the inner edge of the ejection groove will be misaligned, resulting in a gap between the top block and the mold core. Collide with each other and cause damage to the mold core

Method used

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  • Ejecting rotation-proof assembly
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  • Ejecting rotation-proof assembly

Examples

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Embodiment Construction

[0011] see figure 1 , figure 2 As shown, the ejection anti-rotation combination of the present invention is suitable for a mold structure, wherein the mold structure includes a mold core 30, and the mold core 30 is provided with an ejection groove 31 at the side edge of the molding area; and the mold structure An ejector plate 20 is disposed on one side of the mold core 30 , and a through hole 22 is formed in the ejector plate 20 , and an anti-rotation groove 23 is formed on one side of the through hole 22 .

[0012] The ejection anti-rotation combination includes a thimble 10, and one end of the thimble 10 is provided with an anti-rotation portion 11. In this embodiment, the outer surface of the anti-rotation portion 11 is composed of two opposite cylindrical curved surfaces and two opposite straight surfaces. And the anti-rotation part 11 is provided with a locking hole 12, in this embodiment, the locking hole 12 is a screw hole. The other end of the thimble 10 is provide...

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Abstract

The invention relates to an anti-rotation knockout combination which is suitable for a mould structure, wherein, the mould structure comprises a mould core that is provided with a knockout groove at the lateral margin of a mould area; the anti-rotation knockout combination comprises an ejector pin, one end of which is provided with an anti-rotation part, the anti-rotation part is internally provided with a locking-up hole; the outside of the ejector pin is sleeved with an ejector block that is held in the knockout groove, and the ejector block is internally provided with an anti-rotation holding groove which holds the anti-rotation part; the side at the interior of the ejector block where the anti-rotation holding groove is arranged is provided with a penetrating part which is communicated with the locking-up hole; the penetrating part is sleeved and provided with a locking-up piece which is fixed in the locking-up hole. Even though the locking-up piece looses, the anti-rotation coordination between the anti-rotation holding groove and the anti-rotation part can prevent the free rotation of the ejector block, thus avoiding damage of the mould core caused by collision between the ejector block and the mould core.

Description

【Technical field】 [0001] The invention is an ejection anti-rotation combination, in particular an ejection anti-rotation combination which can effectively avoid mold damage. 【Background technique】 [0002] The thimble in the mold structure needs to be anti-rotation designed to ensure that the position of the thimble is in a constant state, so as to avoid misalignment of the thimble during the ejection process. In the existing mold structure design, only focus on anti-rotation at the countersunk head of the thimble, and the locking piece is used to fix the ejector block and the ejector pin, and the contact between the ejector block and the ejector pin is through the cylindrical surface (the ejector block can be rotated relative to the ejector pin ). [0003] If the locking piece is loose during the ejection process, the top block will rotate freely. When the top block returns to its position again, the outer edge of the top block and the inner edge of the ejection groove wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/44
Inventor 刘三辉
Owner MITAC PRECISION TECH(KUNSHAN) CORP
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