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A medical needle point grinding wheel and its manufacturing method

A manufacturing method and grinding wheel technology, which are applied in the manufacture of tools, abrasives, grinding devices, etc., can solve problems such as difficulty in applying high-speed CNC grinding machines, static balance performance of ordinary grinding wheels, insufficient machining accuracy, hardness, and grinding ability, etc. Balanced performance and microstructure uniformity, improved hardness uniformity, improved grinding performance

Active Publication Date: 2014-10-08
QINGDAO SISA ABRASIVES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the disadvantages of ordinary grinding wheels, such as insufficient static balance performance, processing accuracy, hardness and grinding ability, which are difficult to be applied to high-speed numerical control grinding machines when processing syringe needle points in the prior art, and provide a kind of static balance performance. Medical needle point grinding wheel with high hardness, high hardness and strong grinding ability and manufacturing method thereof

Method used

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  • A medical needle point grinding wheel and its manufacturing method
  • A medical needle point grinding wheel and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A needle-point grinding wheel for medical use. The raw material components and weight percentages are: 600-mesh silicon carbide 75%, modified resin 16%, cryolite powder 4%, chromium oxide 2%, zinc oxide 3%. The raw material components and weight percentages of the modified resin are: 91% phenolic resin, 9% hydrogen-butadiene rubber, and the particle size of the cryolite powder is 280 mesh. Cryolite powder, chromium oxide and zinc oxide are fillers.

[0033] The manufacturing process steps of embodiment 1 are as follows:

[0034] 1) Mixing: pass the weighed silicon carbide abrasive and modified resin through a 150# sieve, pour into the mixing pot and mix for 10 minutes, add filler and mix for 5 minutes, pass through a 46# sieve;

[0035] 2) Turn on the preheating device of the molding equipment, set the pressure head temperature to 100-120°C, and set the turntable temperature to 50°C;

[0036] 3) Select the mold, water pressure pad, and pressure pad according to the sp...

Embodiment 2

[0047] A needle-point grinding wheel for medical use has the following raw material components and weight percentages: 900-mesh silicon carbide 74%, modified resin 18%, cryolite powder 4.5%, chromium oxide 1.5%, and zinc oxide 2%. The raw material components and weight percentages of the modified resin are: 92% phenolic resin, 8% hydrogen-butadiene rubber, and the particle size of the cryolite powder is 280 mesh. Cryolite powder, chromium oxide and zinc oxide are fillers.

[0048] The manufacturing process steps of embodiment 2 are as follows:

[0049] 1) Mixing: pass the weighed silicon carbide abrasive and modified resin through a 150# sieve, pour into the mixing pot and mix for 10 minutes, add filler and mix for 5 minutes, pass through a 46# sieve;

[0050] 2) Turn on the preheating device of the molding equipment, set the pressure head temperature to 100-120°C, and set the turntable temperature to 50°C;

[0051] 3) Select the mold, water pressure pad, and pressure pad ac...

Embodiment 3

[0063] The raw material components and weight percentages of a needle point grinding wheel for medical use are: 900 mesh silicon carbide 77%, modified resin 14%, cryolite powder 5%, chromium oxide 2%, zinc oxide 2%. The raw material components and weight percentages of the modified resin are: 95% phenolic resin, 5% hydrogen-butadiene rubber, and the particle size of the cryolite powder is 280 mesh. Cryolite powder, chromium oxide and zinc oxide are fillers.

[0064] Compared with the traditional needle-point grinding wheel, the present invention improves the formula and material of the grinding wheel. By using modified resin and choosing cryolite as filler, the present invention improves the service life of the grinding wheel and the puncture force of the medical needle point.

[0065] The table below shows the comparison of the service life and puncture force of the grinding wheel tip prepared in the three embodiments of the present invention and the traditional grinding whee...

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Abstract

The invention belongs to the field of a grinding wheel and a manufacturing method of the grinding wheel, and particularly relates to a medical needle pin grinding wheel and a manufacturing method of the medical needle pin grinding wheel. The medical needle pin grinding wheel is characterized by comprising the following raw materials in percentage by weight: 74 to 79 percent of silicon carbide, 14 to 18 percent of modified resin, 4 to 6 percent of cryolite powder, 1.5 to 3 percent of chromic oxide and 2 to 4 percent of zinc oxide, wherein the cryolite powder, the chromic oxide and the zinc oxide are used as fillers. Compared with traditional needle pin grinding wheel, the needle pin grinding wheel provided by the invention improves the formula and the materials, and the service life is prolonged and the puncturing force of the medical needle pin is improved by the use of modified resin and by adopting the cryolite as the filler. As a hydraulic cushion is used for forming, the structure homogeneity of the grinding wheel is excellent in the diameter direction and the thickness direction, and the static balance size of the grinding wheel is 30 to 50% more than that of common formation technology. The materials are fed at different times, and are then pressed by the hydraulic cushion since feeding every time, so that the uniformity of hardness of the grinding wheel in the thickness direction is obviously improved.

Description

technical field [0001] The invention belongs to the field of grinding wheels and manufacturing methods thereof, in particular to a medical needle point grinding wheel and a manufacturing method thereof. Background technique [0002] At present, the traditional grinding wheel used in the medical device industry has low precision of the needle tip of the syringe, poor surface roughness, burrs on the needle tip, and low grinding efficiency. In recent years, the CNC grinding machines introduced by the medical device industry require grinding wheels with good static balance performance, uniform structure, good grinding self-sharpening, high dimensional accuracy, long service life and high grinding efficiency. If the CNC machine tool uses a domestically produced conventional grinding wheel to grind the needle tip, due to the large vibration of the grinding wheel, the ground needle tip will have burrs, and the puncture force will be large, and the surface roughness and dimensional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/28B24D18/00
Inventor 王珍翟纯锌
Owner QINGDAO SISA ABRASIVES CO LTD
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