A method for attaching a large-size crystal block screen

Abstract

The application provides a large-size crystal block screen fitting method. The crystal block screen is fitted with a fixing clamp and a crystal sheet, and the spliced surface is glued and fastened by a screw and formed integrally at one time, and the integrity is good. The obtained large-size crystal block screen has high overall strength and good processing consistency, and can effectively prolong the service life. The manufacturing method has the characteristics of convenient processing, flexible assembly and compact structure, thereby greatly reducing the manufacturing cost.

Description

Technical Field

[0001] This application relates to the field of scintillation crystal detection, and in particular to a method for bonding large-size crystal block screens. Background Technology

[0002] Scintillation crystal detectors typically utilize scintillation crystals, which can effectively block and absorb electromagnetic radiation and emit light in response to it, as the detection material. Scintillation crystal detectors are scintillation detectors that use the flashes of light produced by ionizing radiation in certain substances for detection. They are characterized by high detection efficiency and short resolution, and are widely used in research on nuclear medicine, security inspection, high-energy physics, and cosmic ray detection.

[0003] When high-energy rays are incident on a scintillation crystal, depending on the ray energy, the effective atomic coefficient, and density of the crystal, different proportions of photoelectric effect, Compton scattering effect, and pair production occur, depositing energy into the scintillation crystal. The excited scintillation crystal then de-excites, emitting scintillation light. Using a photodetector such as a PMT (Photomultiplier Tube), the scintillation light located in the visible or ultraviolet region is converted and multiplied to form a pulse signal. The pulse signal intensity reflects the energy of the high-energy ray; the timing of the pulse signal reflects the incident time of the high-energy ray; and the intensity distribution of the pulse signal among multiple photomultiplier tubes reflects the incident position of the high-energy ray. When a high-speed electron beam bombards certain solid materials, the bombarded object can produce X-rays invisible to the naked eye. X-rays have great penetrating power, passing through human tissue and steel plates several centimeters thick without obstruction. Therefore, they can be used for medical diagnosis, industrial flaw detection, and material analysis. Materials that can fluoresce under X-ray irradiation are called scintillation materials. In addition to fluorescing under X-ray irradiation, scintillation materials also fluoresce when irradiated by other high-energy rays such as alpha rays and beta rays produced by the decay of radioactive isotopes. People have used this property of scintillation materials to make detectors for measuring various rays. When high-energy rays irradiate the detector, the scintillation material fluoresces. The stronger the ray, the stronger the fluorescence. This fluorescence is received by a photoelectric conversion system and converted into an electrical signal. After being processed by electronic circuitry, it can be indicated on an indicator. Therefore, people liken this kind of detector to an "eye" that can see X-rays and other high-energy rays.

[0004] Conventional techniques for manufacturing large-size crystal display panels involve polishing crystal wafers, splicing them together, and then reinforcing them with an outer frame. This approach has a problem: large seams at the joints and poor fit between the panel and the frame due to the use of glue. This results in a weak overall panel strength and poor image integrity. Therefore, a novel approach is needed to address the problems encountered in the manufacturing process of large-size crystal display panels. Summary of the Invention

[0005] According to one aspect of this application, a method for manufacturing a crystal block screen is provided. The crystal block screen has a fixing clamp that cooperates with the crystal sheet, and the splicing method involves gluing the splicing surfaces together and securing them with screws in a single molding process, resulting in good integrity. This invention is achieved using the following technical solution:

[0006] A method for bonding large-size crystal block screens includes the following steps:

[0007] Step 1) Place the crystals A and B to be bonded into the grooves of clamp A and clamp B respectively; the size of the groove of clamp A is the same as that of crystal A, and the inner wall of the groove of clamp A is in close contact with the surface of crystal A; the size of the groove of clamp B is the same as that of crystal B, and the inner wall of the groove of clamp B is in close contact with the surface of crystal B.

[0008] Step 2) Grind and polish the surface of crystal A at the opening of the groove in fixture A to serve as the splicing surface; grind and polish the surface of crystal B at the opening of the groove in fixture B to serve as the splicing surface.

[0009] Step 3) Apply optical adhesive to the splicing surfaces of crystal A and crystal B, then bond the splicing surfaces of crystal A and crystal B together, and fix clamp A and clamp B together;

[0010] Step 4) Remove the portions of clamps A and B that are attached to the outer sides of the front and back of the crystal block screen to expose the crystal surface and form a spliced ​​crystal block screen; the remaining portions of clamps A and B form the outer frame of the crystal block screen.

[0011] Optionally, the dimensions of crystal A and crystal B are independently selected from 40-60DD220174Hmm*40-60mm*8-12mm.

[0012] Optionally, the friction between crystal A and clamp A prevents crystal A from sliding relative to clamp A; the friction between crystal B and clamp B prevents crystal B from sliding relative to clamp B.

[0013] Optionally, clamp A and clamp B are fixed together by mutually cooperating fixing parts.

[0014] Optionally, the fixing part is located on the outer frame of the crystal block screen.

[0015] Optionally, clamp A and clamp B are provided with matching screw holes, and clamp A and clamp B are fixed together by bolts.

[0016] Optionally, both clamp A and clamp B are provided with positioning holes. When fixing clamp A and clamp B in step 3), the positioning holes on clamp A and clamp B are aligned.

[0017] Optionally, after the crystal surface is exposed in step 4), the crystal surface is subjected to grinding and polishing treatment.

[0018] The present invention also proposes a large-size crystal block screen that is bonded using the above method.

[0019] The beneficial effects that this application can produce include:

[0020] 1) The large-size crystal block screen provided in this application has high overall strength and good processing consistency. Can it effectively extend its service life?

[0021] 2) The method for manufacturing large-size crystal block screens provided in this application has the characteristics of convenient processing, flexible assembly, and compact structure, thereby greatly reducing manufacturing costs. Attached Figure Description

[0022] Figure 1 The fixture structure is as shown in Example 1;

[0023] Figure 2 This is a schematic diagram of the assembly and its splicing surfaces in Example 1;

[0024] Figure 3 This is a schematic diagram of the spliced ​​body in Example 1;

[0025] Figure 4 This is a schematic diagram of the end face of the spliced ​​body in Example 1;

[0026] Figure 5 This is a schematic diagram of the finished large-size crystal block screen in Example 1.

[0027] Figure label:

[0028] DD220174H

[0029] 101-Fixing clamp, 102-Crystal block, 103-Screw hole, 104-Positioning hole, 105-Assembly, 106-Splicing surface, 107-Splicing body, 108-Upper end face, 109-Lower end face, 1010-Finished panel Detailed Implementation

[0030] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0031] Unless otherwise specified, all raw materials used in the embodiments of this application were purchased through commercial channels.

[0032] Example 1: Fabrication of a scintillation crystal block screen

[0033] In this embodiment, both crystal A and crystal B are 50mm*50mm*10mm in size, and the groove of the fixing fixture is also 50mm*50mm*10mm in size. The two fit tightly together to ensure that the crystal sheet and the fixing fixture will not slide relative to each other.

[0034] The crystal block 102 is placed into the groove of the fixing fixture 101 so that the crystal block and the fixing fixture will not slide relative to each other;

[0035] The splicing surface 106 of the assembly 105 composed of the crystal block 102 and the fixing fixture 101 is ground and polished;

[0036] Meanwhile, another assembly is prepared, and the above steps are repeated;

[0037] Apply optical adhesive to the two splicing surfaces of the two prepared assemblies 105 and 106 and attach them according to the position of the positioning hole 104;

[0038] Secure the screw holes of 103 with screws to join the two parts together to form the spliced ​​body 107;

[0039] The upper and lower end faces 108 and 109 of the splice body 107 are removed by cutting a single line, exposing the front and back of the crystal block screen.

[0040] The crystal surface is ground and polished to obtain the crystal block screen 1010.

Claims

1. A method for bonding large-size crystal block screens, characterized in that, Includes the following steps: Step 1) Place the crystals A and B to be bonded into the grooves of clamp A and clamp B respectively; the size of the groove of clamp A is the same as that of crystal A, and the inner wall of the groove of clamp A is in close contact with the surface of crystal A; the size of the groove of clamp B is the same as that of crystal B, and the inner wall of the groove of clamp B is in close contact with the surface of crystal B. Both clamp A and clamp B are provided with positioning holes, and clamp A and clamp B are provided with mutually cooperating screw holes; Step 2) Grind and polish the surface of crystal A at the groove opening of fixture A to serve as the splicing surface; grind and polish the surface of crystal B at the groove opening of fixture B to serve as the splicing surface; Step 3) Apply optical adhesive to the splicing surfaces of crystal A and crystal B, then bond the splicing surfaces of crystal A and crystal B together, align the positioning holes on clamp A and clamp B, and fix clamp A and clamp B together with bolts; Step 4) Remove the portions of clamps A and B that are attached to the outer sides of the front and back of the crystal block screen to expose the crystal surface and form a spliced ​​crystal block screen; the remaining portions of clamps A and B form the outer frame of the crystal block screen; The friction between crystal A and clamp A prevents crystal A from sliding relative to clamp A; the friction between crystal B and clamp B prevents crystal B from sliding relative to clamp B. After the crystal surface is exposed in step 4), the crystal surface is ground and polished.

2. The large-size crystal block screen obtained by the bonding method according to claim 1.

Images