Abstract: A semi-automatic corrosion box of a copper clad laminate is disclosed. The corrosion device comprises a box body which has no cover; a baffle plate which divides the corrosion box into an upper part and a lower part, wherein a copper clad laminate circuit board is placed on the baffle plate, and a temperature detection module, water pumps and a heating rod are placed on a lower part; and a thermal imaging camera which is placed on a pressing plate through a bracket. Modules in corrosive liquid are connected with an external single chip microcomputer control module through corrosion-resistant wires. The working mode of the present invention is that time and temperature are set with a key matrix at first, and the control module can automatically stop working and enter a low power consumption mode.

Abstract: A protective case for electronic device includes an inner shell, an outer shell, and a magnetic interlayer that fits and in contact with the inner shell and the outer shell, wherein: the magnetic interlayer includes an interlayer base material and a magnetic part, the magnetic interlayer is provided with a through installation hole, and the magnetic part is fixedly embedded in the installation hole, the thickness of the magnetic part matches with the depth of the installation hole, the interlayer base material includes a hot-melt base material and reinforcing fiber yarn contained in the hot-melt base material, and the hot-melt base material is filled between the magnetic part and the inner side wall of the installation hole.

Abstract: The present disclosure relates to the technical field of protective case, in particular to a protective case for electronic device and a method for manufacturing the same. The protective case for electronic device includes an inner shell, an outer shell, and a magnetic interlayer that fits and in contact with the inner shell and the outer shell, wherein: the magnetic interlayer includes an interlayer base material and a magnetic part, the magnetic interlayer is provided with a through installation hole, and the magnetic part is fixedly embedded in the installation hole, the thickness of the magnetic part matches with the depth of the installation hole, the interlayer base material includes a hot-melt base material and reinforcing fiber yarn contained in the hot-melt base material, and the hot-melt base material is filled between the magnetic part and the inner side wall of the installation hole.

Abstract: Embodiments of the present application disclose a protective case for a portable electronic device, which includes a rear shell and a camera decorative ring, the rear shell includes a back plate and a clamping element, the back plate is provided with an avoidance hole, and the inner wall surface of the avoidance hole is provided with a first retention groove, the outer peripheral surface of the camera decorative ring is provided with a limit surface, and a limit part is formed between the limit surface and the inner end surface of the camera decorative ring; the limit part is embedded in the first retention groove, and the inner end surface of the camera decorative ring is evenly aligned with or lower than the inner surface of the back plate.

Abstract: Embodiments of the present application disclose a protective case for a portable electronic device, which includes a rear shell and a camera decorative ring, the rear shell includes a back plate and a clamping element, the back plate is provided with an avoidance hole, and the inner wall surface of the avoidance hole is provided with a first retention groove, the outer peripheral surface of the camera decorative ring is provided with a limit surface, and a limit part is formed between the limit surface and the inner end surface of the camera decorative ring; the limit part is embedded in the first retention groove, and the inner end surface of the camera decorative ring is evenly aligned with or lower than the inner surface of the back plate.

Abstract: The present disclosure relates to the technical field of protective case, in particular to a protective case for electronic device and a method for manufacturing the same. The protective case for electronic device includes an inner shell, an outer shell, and a magnetic interlayer that fits and in contact with the inner shell and the outer shell, wherein: the magnetic interlayer includes an interlayer base material and a magnetic part, the magnetic interlayer is provided with a through installation hole, and the magnetic part is fixedly embedded in the installation hole, the thickness of the magnetic part matches with the depth of the installation hole, the interlayer base material includes a hot-melt base material and reinforcing fiber yarn contained in the hot-melt base material, and the hot-melt base material is filled between the magnetic part and the inner side wall of the installation hole.

Abstract: A semi-automatic corrosion box of a copper clad laminate is disclosed. The corrosion device comprises a box body which has no cover; a baffle plate which divides the corrosion box into an upper part and a lower part, wherein a copper clad laminate circuit board is placed on the baffle plate, and a temperature detection module, water pumps and a heating rod are placed on a lower part; and a thermal imaging camera which is placed on a pressing plate through a bracket. Modules in corrosive liquid are connected with an external single chip microcomputer control module through corrosion-resistant wires. The working mode of the present invention is that time and temperature are set with a key matrix at first, and the control module can automatically stop working and enter a low power consumption mode.

Abstract: A method for designing a support damping structure. A total effective damping ratio of the additional support damping structure is preset. A size of an equivalent strut in the structure is assumed, and the equivalent strut is placed at a position where an additional damper is required to be placed. A structural response of the additional damper to the preset total effective damping ratio is calculated; a horizontal resultant of the equivalent strut and a horizontal displacement of the equivalent strut are calculated. A yield strength of the additional damper and a yield displacement of the additional damper are estimated according to the horizontal resultant of the equivalent strut and the horizontal displacement of the equivalent strut. A size of the actual strut in the structure is determined; a total effective damping ratio of the additional support damping structure is obtained.

Abstract: A method for recovering thorium and rare earth elements from rare earth waste residues includes the steps of (1) mixing rare earth waste residues with an inorganic acid and heating to obtain a stock solution containing thorium and rare earth elements; (2) extracting thorium and rare earth elements from the stock solution with an organic phase containing an extractant; (3) washing the organic phase obtained after extraction in step (2) with a washing solution to move rare earth elements into the aqueous phase and leave thorium in the organic phase; (4) back-extracting the organic phase containing thorium obtained in step (3) with a back-extraction solution to extract move thorium in the organic phase into the aqueous phase. The extractant contains alkyl phosphonic acid monoalkyl ester and dialkylphosphinic acid.

Abstract: A method for recovering thorium and rare earth elements from rare earth waste residues comprises: (1) mixing rare earth waste residues with an inorganic acid and heating to obtain a stock solution containing thorium and rare earth elements; (2) extracting thorium and rare earth elements from the stock solution with an organic phase containing an extractant; (3) washing the organic phase obtained after extraction in step (2) with a washing solution to move rare earth elements into the aqueous phase and remain thorium in the organic phase; (4) back-extracting the organic phase containing thorium obtained in step (3) with a back-extraction solution to move thorium in the organic phase into the aqueous phase; said extractants are alkyl phosphonic acid monoalkyl ester and dialkylphosphinic acid.