A carbon fiber material integral package lead grid mold based on low density material

Abstract

The invention discloses a carbon fiber material integrally packaged lead grid mold body based on low-density materials, which mainly consists of two parts: a slit lead plate and a low-density material encapsulating the slit lead plate, the upper and lower sides of the slit lead plate and The surrounding sides are all sealed as a whole with low-density materials, and the slit lead plates are not exposed to the environment. The carbon fiber material integrally packaged lead grid mold body based on low-density materials provided by the present invention adopts low-density materials, preferably carbon fiber materials as packaging materials, and its strength is higher than that of steel, and its density is smaller, and it is more corrosion-resistant and heat-resistant than stainless steel. Steel is more resistant to high temperature, can conduct electricity, has excellent electrical, thermal and mechanical properties, greatly reduces the weight of the entire lead grid mold body, and solves the problems of overweight caused by the use of metal adhesives for the existing lead grid mold body. , The lead grid pattern is not delaminated, cracked, deformed, has a long service life, and the test data is accurate.

Description

technical field [0001] The invention belongs to the technical field of gamma cameras and single photon emission tomography (SPECT) quality control and detection equipment, and in particular relates to a carbon fiber material integrally packaged lead grid mold body based on low-density materials. Background technique [0002] At present, the panels of the slit lead grid mold body packaging lead grid commonly used in the market are mainly made of aluminum or steel. When the aluminum material is used to package the lead grid, the density of aluminum is 2.7g / cm 3 , the material is soft metal, and the ordinary adhesive packaging process is generally used. Since the slit lead plate is metal and the panel is also metal, the glue bonds the two metals together, which cannot be stabilized and cannot be kept without deformation for a long time. In addition, the lead The melting point is roughly 327.5°C, and the specific gravity of lead reaches 11.3437g / cm 3 After the two heavy metals...

AI Technical Summary

Problems solved by technology

When the aluminum material is used to package the lead grid, the density of aluminum is 2.7g / cm 3 , the material is soft metal, and the ordinary adhesive packaging process is generally used. Since the slit lead plate is metal and the panel is also metal, the glue bonds the two metals together, which cannot be stabilized and cannot be kept without deformation for a long time. In addition, the lead The melting point is roughly 327.5°C, and the specific gravity of lead reaches 11.3437g / cm 3 After the two heavy metals are encapsulated with glue, the glue is easy to age, which can easily lead to deformation and cracking of the finished product, and the gamma source (technetium-99) directly irradiates the lead grid phantom, and when analyzing the SPECT equipment through the lead grid slit, Because the aluminum plate is an attenuation plate, it seriously affects the penetration rate of rays and affects the measurement data

When the lead grid is packaged with steel, the density of the steel is 7.9g / cm 3 , due to the high density, it is easy to cause the lead grid mold to be overweight, which will cause a burden on the crystal load of large-scale SPECT equipment

[0003] In addition, after many lead grid mold bodies are formed, the upper and lower fixing plates and inner layer lead plates are not consolidated and fixed around the mold body, and the overall package is not carried out. After a certain period of use, each layer of the lead grid mold body will be delaminated and deformed. , cracking, etc., seriously affect the test data

There is also a part of the upper and lower panels of the lead grid mold body that are in direct contact with the aluminum plate or other metal materials, and there is no outer protection. The aluminum plate or other metal materials are more likely to be deformed by external collisions, and the exposed metal materials are also easy to oxidize and affect the entire lead grid mold body. quality, such as Figure 1-4 As shown, the glue package is used for a period of time and the glue overflows, causing all the internal slits of the product to be deformed. When the lead grid mold is deformed and cracked, it will directly affect the deformation of the internal lead slits.

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