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Semi-finished product of O-shaped ring with inner diameter smaller than 0.5 mm, forming die and trimming method thereof

A semi-finished product, inner diameter technology, used in the field of rubber product trimming, can solve the problems of cracks on the surface of the O-ring, difficult to operate, unable to be cleaned, etc., to achieve high trimming efficiency, easy to remove, and improve the effect of trimming efficiency.

Inactive Publication Date: 2014-04-23
南京金三力橡塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to overcome in the prior art, the manual trimming of the O-ring with inner diameter less than 0.5mm and frozen trimming technology are difficult to operate, low in efficiency, impossible to repair, and the surface of the O-ring is stretched. Insufficient cracks, provide a semi-finished O-ring with an inner diameter of less than 0.5mm, its forming die and its trimming method

Method used

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  • Semi-finished product of O-shaped ring with inner diameter smaller than 0.5 mm, forming die and trimming method thereof
  • Semi-finished product of O-shaped ring with inner diameter smaller than 0.5 mm, forming die and trimming method thereof
  • Semi-finished product of O-shaped ring with inner diameter smaller than 0.5 mm, forming die and trimming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] combine figure 1 , the semi-finished product of the O-ring in this embodiment has an inner diameter of 0.4 mm and a wire diameter of 0.8 mm. Its structure includes an O-ring 3, a boss 1 and a diamond-shaped cutting edge 2, and the inner ring cutting edge of the O-ring 3 is set There is a boss 1, and the edge of the outer ring of the O-ring 3 is provided with a diamond-shaped cutting edge 2. The boss 1 is rectangular, and the boss 1 is 0.3mm higher than the top of the O-ring 3 . The left end point and the right end point of the bottom of the boss 1 are respectively 0.03 mm away from the inner edge of the O-ring 3 .

[0043] The diamond-shaped cutting edges 2 of the outer rings of adjacent O-rings 3 overlap each other, and the overlapping width is 1 / 2 of the horizontal width of the diamond-shaped cutting edges 2, so that the semi-finished products are connected to form a network structure. One end of the diamond-shaped cutting edge 2 close to the O-ring 3 is 0.03mm away...

Embodiment 2

[0056] Such as figure 1 , The O-ring semi-finished product of this embodiment has an inner diameter of 0.48 mm and a wire diameter of 1 mm. Its structure is basically the same as in Embodiment 1, except that the boss 1 is 0.5 mm higher than the top of the O-ring 3 . The left end point and the right end point of the bottom of the boss 1 are respectively 0.05 mm away from the inner edge of the O-ring 3 . One end of the diamond-shaped cutting edge 2 close to the O-ring 3 is 0.05mm away from the outer edge of the O-ring 3 .

[0057] The trimming method of O-ring semi-finished product of the present invention, its steps are:

[0058] (1) Feeding: Add 12,000 untrimmed O-rings (volume about 3.2L) to the cylinder 6 of the 10L pulsator trimmer, and the volume of the O-ring is 2 / of the effective volume of the cylinder 6 5;

[0059] (2) Spray lubricant: Spray 1.5mL of water on the surface of the O-ring in the cylinder as a lubricant, and cover the upper cover 7, such as image 3 ; ...

Embodiment 3

[0068] The semi-finished product of the O-ring 3 of this embodiment, the inner diameter of the O-ring 3 is 0.44mm, the wire diameter is 0.9mm, its structure is basically the same as that of Embodiment 1, the difference is that the boss 1 is higher than the O-ring 3 Top 0.4mm. The left end point and the right end point of the bottom of the boss 1 are respectively 0.04 mm away from the inner edge of the O-ring 3 . One end of the diamond-shaped cutting edge 2 close to the O-ring 3 is 0.04mm away from the outer edge of the O-ring 3 .

[0069] The semi-finished trimming method of O-ring 3 of the present invention, its steps are:

[0070] (1) Feeding: Add 10,000 pieces of untrimmed O-rings (volume about 2.7L) to the cylinder 6 of the 10L pulsator-type trimming machine, and the volume of the semi-finished O-ring 3 is the effective volume of the cylinder 6 1 / 3;

[0071] (2) Spray lubricant: Spray 1mL of water on the surface of the O-ring 3 inside the cylinder 6 as a lubricant, and ...

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Abstract

The invention discloses a semi-finished product of an O-shaped ring with an inner diameter smaller than 0.5 mm, a forming die and a trimming method thereof, and belongs to the field of trimming of rubber products. The semi-finished product of the O-shaped ring with the inner diameter smaller than 0.5 mm comprises the O-shaped ring, wherein a lug boss is arranged on the cutting edge of the inner circle of the O-shaped ring; a diamond-shaped cutting edge is arranged on the cutting edge of the outer circle of the O-shaped ring; the diamond-shaped cutting edges of the outer circles of adjacent O-shaped rings are overlapped with each other, so that the semi-finished products are connected to form a netlike structure. The cavity of the forming die corresponds to the structure of the semi-finished product of the O-shaped ring. The trimming method comprises the steps of: (1) charging; (2) spraying a lubricant; (3) trimming centrifugally; (4) sorting. The method realizes the purpose of reducing trimming length of the O-shaped ring with the inner diameter smaller than 0.5 mm, improving the sealing performance of the O-shaped ring, and reducing the dynamic sealing friction resistance.

Description

technical field [0001] The invention belongs to the field of edge trimming of rubber products, and more specifically relates to a semi-finished product of an O-ring with an inner diameter of less than 0.5 mm, a forming mold and a trimming method thereof. Background technique [0002] The rubber O-ring has simple structure and reliable sealing performance, and is widely used in various sealing fields. The size of the O-ring flash has a great influence on its sealing performance. The smaller the O-ring flash, the better the sealing performance. For O-rings of regular size, manual trimming and freezing trimming can be selected as the trimming method, which can control the flash of the O-ring to 0.08-0.1mm in the length direction. For some O-rings with extremely small inner diameters, especially when the inner diameter is less than 0.5mm, trimming is more difficult. When trimming by hand, it is difficult to operate because of the small inner diameter of the O-ring, and the trim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/00B29C37/02B29L31/26
Inventor 芮巧红程万福何志刚
Owner 南京金三力橡塑有限公司
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