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All-in-one lead-free cavity used for shielding high-energy rays and preparation method

A high-energy ray and cavity technology, applied in coatings and other directions, can solve problems such as health hazards for users, cumbersome processes, and poor reliability, and achieve the effects of good shielding effect, convenient manufacture, and simple structure

Inactive Publication Date: 2017-12-12
上海六晶科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current walls used to shield high-energy rays are mostly processed by combining lead metal with aluminum metal, and then go through the steps of crushing, granulation, and injection molding in sequence. The process is relatively cumbersome. Serious hazards to health; moreover, the shape of lead metal is poor, if the cavity for shielding high-energy rays needs to be combined with aluminum metal, it can be prepared by means of aluminum metal shaping, and due to the combination of lead metal and aluminum metal There will be gaps, which will cause the cavity to be unable to effectively shield high-energy rays, and will shield part of the high-energy rays while missing part of the high-energy rays, and the reliability is poor.

Method used

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  • All-in-one lead-free cavity used for shielding high-energy rays and preparation method
  • All-in-one lead-free cavity used for shielding high-energy rays and preparation method
  • All-in-one lead-free cavity used for shielding high-energy rays and preparation method

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preparation example Construction

[0020] Such as Figure 5 As shown, a method for preparing a lead-free cavity that is integrally formed for shielding high-energy rays is characterized in that it includes the following steps: 1) Step 1, take tungsten powder, and modify the tungsten powder; 2) Step 2, put The modified tungsten powder is blended with nylon and organic acid to obtain a blended material, and the blending temperature is 230°C; 3) Step 3, injection molding, put the blended material into a mold, the mold temperature is 130-145°C, and the pressure is 65- 80Mpa; 4) Step 4, take out the injection-molded blend material from the mold, and after cooling down, you can get a lead-free cavity for shielding high-energy rays.

[0021] The mass percent of tungsten powder in the step 1 is 5%wt-96%wt, the particle size of the tungsten powder particles is 1-50 μm, the sum of the mass percent of tungsten powder and nylon is 99.9%wt, the mass percent of organic acid 0.1%wt. Wherein organic acid comprises any one in...

Embodiment

[0024] Take 95% wt of tungsten powder, 4.9% wt of nylon 6 and 0.1% wt of stearic acid, and blend them at a temperature of 230°C; put the blended materials into the injection molding machine, and set the parameters of material temperature 5 sections, respectively 230°C, 245°C, 245°C, 245°C and 240°C, mold temperature 140°C, pressure 70Mpa, injection molding; take out the injection-molded semi-finished product, after cooling down, carry out mechanical processing and fine carving.

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Abstract

The invention relates to the field of lead-free shielding, in particular to an all-in-one lead-free cavity used for shielding high-energy rays. The lead-free cavity comprises a cavity, and is characterized in that: an opening is formed above the cavity; the bottom of the cavity is provided with supports; the support is stripped, and the supports are placed on the bottom of the cavity; the cavity and the supports are prepared from tungsten powder, nylon and organic acid. The preparation method comprises the following steps: (1) modifying tungsten powder; (2) co-blending the modified tungsten powder and the organic acid at the temperature of 220 to 250 DEG C to obtain co-blended material; (3) injection-molding, placing the co-blended material into a mold, wherein the temperature of the mold is 130 to 145 DEG C, and the pressure is 65 to 80Mpa; (4) taking the injection-molded co-blended material out of the mold, and cooling to obtain the lead-free cavity used for shielding the high-energy rays. Compared with the prior art, the lead-free cavity is simple in structure, and is convenient to manufacture; an all-in-one technology is adopted, compared with the conventional shielding cavity, long service life and good shielding effect are achieved.

Description

technical field [0001] The invention relates to the field of lead-free shielding, in particular to an integrally formed lead-free cavity for shielding high-energy rays and a preparation method thereof. Background technique [0002] The current walls used to shield high-energy rays are mostly processed by combining lead metal with aluminum metal, and then go through the steps of crushing, granulation, and injection molding in sequence. The process is relatively cumbersome. Serious hazards to health; moreover, the shape of lead metal is poor, if the cavity for shielding high-energy rays needs to be combined with aluminum metal, it can be prepared by means of aluminum metal shaping, and due to the combination of lead metal and aluminum metal There will be gaps, which will cause the cavity to be unable to effectively shield high-energy rays, and will shield part of the high-energy rays while missing part of the high-energy rays, and the reliability is poor. Contents of the inv...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K3/08C08K5/09B29C45/00B29C45/77B29C45/78B29K505/00
CPCB29C45/00B29C45/77B29C45/78B29C2945/76498B29C2945/76531B29K2505/00C08K3/08C08K5/09C08K2003/0887C08K2201/003C08L77/02
Inventor 朱玉斌朱治伟李邦怿
Owner 上海六晶科技股份有限公司