CN116456639B - Low noise reinforcement cabinet with local porous honeycomb structure - Google Patents
Low noise reinforcement cabinet with local porous honeycomb structure Download PDFInfo
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- CN116456639B CN116456639B CN202211555417.5A CN202211555417A CN116456639B CN 116456639 B CN116456639 B CN 116456639B CN 202211555417 A CN202211555417 A CN 202211555417A CN 116456639 B CN116456639 B CN 116456639B
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- 230000002787 reinforcement Effects 0.000 title claims description 6
- 238000005266 casting Methods 0.000 claims abstract description 64
- 238000010521 absorption reaction Methods 0.000 claims abstract description 49
- 238000005187 foaming Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000007528 sand casting Methods 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims description 43
- 239000002245 particle Substances 0.000 claims description 31
- 239000000919 ceramic Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 239000001993 wax Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000010146 3D printing Methods 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000003801 milling Methods 0.000 claims description 5
- 239000012188 paraffin wax Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000009966 trimming Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005495 investment casting Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 230000008439 repair process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/04—Casting by dipping
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
Abstract
The invention relates to a low-noise reinforced cabinet with a local porous honeycomb structure, which comprises a cabinet body and a rear plate, wherein the rear plate is fixedly connected with the rear side of the cabinet body; the cabinet body is of a sand casting integrated structure, and porous conical sound absorption pit structures are densely distributed on the inner wall of the cabinet body at the positions of the left middle rear part and the right middle rear part; the rear plate is of a pressurized seepage casting integrated forming structure and comprises an outer plate layer and an inner sound absorption structure layer, wherein the inner sound absorption structure layer is of a foaming honeycomb sound absorption structure; the porous conical sound absorption pits at the middle rear parts of the left side and the right side of the cabinet body and the foaming honeycomb sound absorption structure at the inner side of the rear plate form a sound absorption effect area surrounded by three surfaces at the middle rear part in the cabinet. The invention achieves better sound absorption and noise reduction performance and is suitable for forced air cooling working environment.
Description
Technical Field
The invention belongs to the field of computer engineering application, and particularly relates to a low-noise reinforced cabinet with a local porous honeycomb structure.
Background
In the severe environment of high temperature, high humidity and strong vibration, the air-cooled reinforcement cabinet is used as an installation carrier of electronic equipment such as display, control and UPS, and the like, provides a stable and reliable working environment for the electronic equipment, and simultaneously has the functions of protecting the equipment from being damaged by external forces such as impact, jolt and the like and uniformly radiating the equipment on the equipment, so that the air-cooled reinforcement cabinet is widely applied in various fields. However, on one hand, with the development of miniaturization, integration and high performance of components, the air-cooled reinforced cabinet needs to provide larger air quantity to meet the heat dissipation requirement of equipment on the cabinet; on the other hand, the requirements of users on the concealed installation equipment and comfortable working environment are becoming stronger, and the noise of the air-cooled reinforced cabinet needs to be reduced to meet the requirements of users on the low-noise environment.
Although the performance and reliability of the traditional air-cooled reinforced cabinet resisting severe environments meet the use requirements of users, and the traditional air-cooled reinforced cabinet has a certain sound insulation effect, the defects are obvious: (1) The aerodynamic noise generated by the air-cooled electronic equipment arranged on the cabinet is overlapped with the noise generated by the cabinet fan, so that the noise at the rear part of the cabinet is increased; (2) When the gap exists in the front of the cabinet, noise sound waves generated by the electronic equipment are reflected after striking the rear plate of the cabinet, and are transmitted to the environment where operators are located through gaps among the electronic equipment and a heat dissipation air path of the equipment, so that environmental noise is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the low-noise reinforced cabinet with the sound absorption and noise reduction performances and suitable for a local porous honeycomb structure in a forced air cooling working environment.
The above object of the present invention is achieved by the following technical solutions:
a local porous honeycomb structure low noise reinforcement rack which characterized in that: the novel multifunctional cabinet comprises a cabinet body and a rear plate, wherein the rear plate is fixedly connected with the rear side of the cabinet body; the cabinet body is of a sand casting integrated structure, and porous conical sound absorption pit structures are densely distributed on the inner wall of the cabinet body at the positions of the left middle rear part and the right middle rear part; the rear plate is of a pressurized seepage casting integrated forming structure and comprises an outer plate layer and an inner sound absorption structure layer, wherein the inner sound absorption structure layer is of a foaming honeycomb sound absorption structure; the porous conical sound absorption pits at the middle rear parts of the left side and the right side of the cabinet body and the foaming honeycomb sound absorption structure at the inner side of the rear plate form a sound absorption effect area surrounded by three surfaces at the middle rear part in the cabinet.
Further: the porous conical sound absorption pit structure is provided with a top aperture of 2mm, a hole height of 10mm, a hole spacing of 2.8mm and a hole pattern drawing angle of 5 degrees, and the local porosity of the porous conical sound absorption pit structure is 60 percent.
Further: the cabinet body is formed in the following mode:
firstly, preparing a cabinet type core investment pattern for manufacturing a sand mold according to the external dimension of a reinforced cabinet, wherein the cabinet type core investment pattern is made of paraffin, and parting the investment pattern according to the use condition of the cabinet, and consists of a wax type upper core and a wax type lower core; the wax-type upper core is arranged at the front part of the cabinet body and mainly has the functions of an upper plug box of the cabinet and an assembly area of zero/accessories; the lower wax-type core is arranged at the rear part of the cabinet body and has the main function of a cable routing area in the cabinet;
step 2, after trimming the investment pattern, preparing a primary sand mold by using the investment pattern through a lost wax casting method, wherein the primary sand mold comprises an upper core sand mold and a lower core sand mold; after hardening, adopting a milling mode to remove materials from two sides of the inner sand mould;
step 3, respectively placing the prefabricated two ceramic molds at two material removing parts on two sides of a lower core sand mold, adhering the prefabricated two ceramic molds with the lower core sand mold through casting glue or fastening the prefabricated two ceramic molds with screws, and then closing the prefabricated two ceramic molds with an upper core sand mold to form a casting mold of a cabinet body; the ceramic mold is prepared by adopting a 3D printing forming technology by taking high-temperature-resistant ceramic as a base material, and the formed mold consists of a flat plate and conical protrusions densely distributed on the inner side of the flat plate, wherein the flat plate is used as a support for fixing, the length and width dimensions are the same as the material removing dimensions in the lower core sand mold after repairing, and the thickness is smaller than the material removing thickness; the diameter of the bottom of the conical bulge is 2mm, the height is 10mm, the interval is 2.8mm, and the die drawing angle is 5 degrees.
And step 3, pouring, shelling, sand cleaning and removing the ceramic die to obtain the required cabinet casting.
Further: the foaming honeycomb sound absorption structure is communicated with the inside of the foam honeycomb sound absorption structure with the porosity of 60-70%, the aperture of 1.6-2mm and the thickness of 20mm.
Further: the rear plate adopts the following forming mode:
the casting mould used for the back plate molding comprises a pressurizing pressure head and a casting mould, wherein the pressurizing pressure head is aligned up and down with the inner cavity of the casting mould, the inner cavity of the casting mould is used for adding molten metal, the bottom of the casting mould is provided with an inner cavity, and an overflow hole is arranged below the inner cavity, and the inner cavity is used for filling particles of a prefabricated particle porous body;
the method comprises the following forming steps:
step 1, after an overflow hole is plugged by a plug, pouring particles into a concave cavity at the bottom of a casting mold, heating, compacting by using a pressurizing pressure head, and prefabricating the porous body of the particles, wherein the thickness of the porous body of the prefabricated particles is 20mm;
step 2, after removing the overflow hole plugs, injecting molten metal into the inner cavity of the casting mold, using a pressurizing pressure head to pressurize the liquid, enabling the molten metal to fully flow into the prefabricated particle porous body, cooling, and removing the casting mold to obtain a casting prefabricated body;
and step 3, placing the casting preform in an ultrasonic water bath, melting and removing NaCl particles to obtain the rear plate casting.
Further: the particles of the prefabricated particle porous body are NaCl, and the diameter of the particles is 1.6-2 mm.
The invention has the advantages and positive effects that:
1. the sound absorption device comprises a cabinet body with a plurality of conical pits on the left side and the right side of the rear part and a rear plate with a porous foaming-shaped communication pore structure, wherein the sound absorption environment is surrounded by three surfaces, the local average porosity is about 60-70%, the sound absorption coefficient of the sound absorption device is about 0.5 through test detection, noise sound waves generated by an internal plug box and reflected sound waves generated by the noise sound waves striking the inner wall surface of the cabinet body can be effectively absorbed, on one hand, sound pressure level of the sound waves generated by the internal sound source transmitted to the environment through gaps between the cabinet and the plug box after being reflected inside the cabinet is reduced, on the other hand, sound pressure level of the sound waves generated by the internal sound source and the sound waves generated by a cabinet fan are reduced after being overlapped, and noise in the front and the rear of the cabinet is reduced under the comprehensive effect.
2. The casting cabinet body is split according to functions, the upper core is an insertion box assembly area, and the casting cabinet body is mainly used for assembling an insertion box, a guide rail and accessories in the cabinet after being formed; the lower core is a sound absorption area, the inner side wall is provided with a sound absorption structure with 60% of porosity, and sound waves reflected by the interior of the cabinet are mainly absorbed. The parting position can be adjusted according to different sizes and configurations of the plug boxes so as to meet the design requirements of different reinforced cabinets;
3. the cabinet body die, the 3D printing multi-cone convex ceramic die and the die based on pressurized seepage casting can be repeatedly used for many times; the invention can adopt cast aluminum materials with different brands, reduces the processing cost and has wider applicability.
4. The invention can be applied to the design and processing of the reinforced cabinet with various sizes, and is designed into standard 19 inch, 21 inch or nonstandard sizes according to the use requirement, and the design requirement of the reinforced cabinet with low noise in different working conditions and different use environments is considered.
Drawings
FIG. 1 is a schematic diagram of the operation of a partially porous honeycomb structured low noise reinforced cabinet of the present invention;
FIG. 2 is a block diagram of an upper wax pattern core and a lower wax pattern core used in the present invention for making a cabinet casting;
FIG. 3 is a block diagram of cope and drag cores employed in the present invention for making cabinet castings;
FIG. 4 is a block diagram of an upper core sand mold, a lower core sand mold, and a ceramic mold used in the preparation of a cabinet casting according to the present invention;
FIG. 5 is a schematic casting view of a back plate casting made in accordance with the present invention;
FIG. 6 is a block diagram of a back plate casting of the present invention.
Detailed Description
The structure of the present invention will be further described by way of examples with reference to the accompanying drawings. It should be noted that the present embodiments are illustrative and not restrictive.
A low-noise reinforced cabinet with a local porous honeycomb structure, please refer to fig. 1-6, mainly comprising a cabinet body 1 and a rear plate 2. Parting the cabinet casting model, manufacturing a paraffin model, and manufacturing a sand mould by a lost wax casting method. And (3) carrying out local material removal on the sand mould at the rear part of the cabinet body, and combining the porous ceramic formed by 3D printing with the multi-conical protrusions and the porosity of 40% to finish the preparation of the final sand mould. The cabinet casting with the porous conical sound absorption pit structure 1.1 with the top aperture of 2mm, the height of 10mm, the spacing of 2.8mm and the local porosity of about 60 percent at the drawing angle of 5 degrees can be prepared by a sand casting method. The back plate casting adopts a pressurized seepage casting method, and a prefabricated particle porous body is used for casting and molding the foaming honeycomb sound absorption structure 2.1 with single-side porosity of about 60-70%, pore diameter of 1.6-2mm and thickness of 20mm and communicated inside. The designed low-noise reinforced cabinet has the advantages that the porous conical sound absorption pits and the foaming communication pore structures are respectively positioned at the middle rear part of the left side and the right side of the cabinet and the back of the cabinet, the average porosity is about 60-70%, under the porosity, the sound absorption coefficient is close to 0.5 through test detection, the noise of the reinforced cabinet filled with the plug box can be reduced by more than 3dB, and the reinforced cabinet is suitable for the environment with high power consumption equipment, high temperature and relatively high noise index requirement.
1. The forming process of the cabinet body is as follows:
1) According to the method, a cabinet type core investment pattern for manufacturing the sand mold is prepared according to the external dimension of a reinforced cabinet, is made of paraffin, is subjected to parting according to the service condition of the cabinet, and is shown in a parting schematic diagram as in fig. 2, and consists of a wax type upper core 4 and a wax type lower core 5. The wax-type upper core is arranged at the front part of the cabinet body and mainly has the functions of an upper plug box of the cabinet and an assembly area of zero/accessories; the lower core of wax type is cabinet body rear portion, and the main function is the inside cable routing district of rack. According to different jack box sizes and configurations, parting positions can be adjusted to meet design requirements of different reinforced cabinets.
2) After trimming the investment pattern, preparing a primary sand mold by using the investment pattern through a lost wax casting method. Specifically, the fire-resistant coating is repeatedly coated on an investment pattern and fire-resistant sand is scattered, the investment pattern is placed in a wooden box body for hardening and drying, and a steam dewaxing method is used for removing a wax core and then the sand mold is baked. The primary sand mold prepared according to the parting of the cabinet body is shown in fig. 3, and the primary sand mold is respectively: an upper core sand mold 6 and a lower core sand mold 7. After hardening, the lower core sand mold is processed, and the two sides of the inner sand mold are removed by adopting a milling mode (black area in fig. 4), wherein the removal thickness is 25mm.
3) The casting mould of the cabinet body is shown in fig. 4 and consists of a lower core sand mould, an upper core sand mould and a ceramic mould 8 after the mould is repaired. The ceramic mold is prepared by adopting a 3D printing forming technology by taking high-temperature-resistant ceramic as a base material, wherein the formed mold consists of a flat plate 8.1 and a conical bulge 8.2, the flat plate is used as a support for fixing, the length and width dimensions are the same as the dimension for removing materials in a lower core sand mold after repairing, and the thickness is 20mm; the diameter of the bottom of the conical bulge is 2mm, the height is 10mm, the interval is 2.8mm, and the die drawing angle is 5 degrees.
For the mould with the size, the conventional milling technology has the defects of high difficulty in processing ceramic materials and difficult realization of processing the molding size, the casting method can cast the shape, but the precision is low, the surface of the bulge is rough and difficult to repair, and the later demoulding is difficult. On the one hand, the 3D printing technology can more conveniently form the small-size structure, on the other hand, the forming precision is higher, the smooth conical surface can be realized without trimming the conical bulge in the later stage, and the later stage demolding is facilitated. After the lower core sand mould and the ceramic mould are repaired, the lower core sand mould and the ceramic mould are glued by using casting glue or fastened by using screws, and then are matched with the upper core sand mould to form the casting mould of the cabinet body. And pouring, shelling, sand cleaning and removing the ceramic mould to obtain the required cabinet casting. Because of the existence of the ceramic die, the rear part of the cabinet body after casting forms a dense conical pit, the local porosity is close to 60 percent, and the sound waves are repeatedly reflected in the cone after incidence to consume energy so as to achieve the purpose of reducing noise.
2. The back plate is formed in the following way:
the back plate is cast by pressurized seepage, the casting mode is shown in figure 5, the casting mould is composed of a pressurizing pressure head 9 and a casting mould 10, the bottom of the casting mould is provided with an inner concave cavity, and an overflow hole 10.1 is arranged below the inner concave cavity, and the inner concave cavity is used for filling particles of the prefabricated particle porous body 12. The particles of the prefabricated particle porous body are screened by NaCl, the particles with the diameter of 1.6-2mm are selected, the particles are poured into a casting mould after the overflow holes are plugged, then the casting mould is heated and compacted by a pressurizing pressure head, and the thickness of the prefabricated particle porous body is 20mm. After removing the plug of the overflow hole, injecting ZL104 molten metal into the casting mould, and using a pressurizing head to pressurize the liquid, so that the molten metal 11 fully flows into the prefabricated particle porous body. And cooling, removing the casting mould to obtain a casting preform, placing the preform in an ultrasonic water bath, melting and removing NaCl particles to obtain the rear plate casting. The back plate casting, as shown in fig. 6, is mainly composed of a sound absorbing structure layer and a flat plate structure layer. Due to the existence of the prefabricated particle porous body in fig. 5, the sound absorption structure layer is a foam honeycomb structure with the thickness of 20mm, the pore diameter of 1.6-2mm and the porosity of 65-70% communicated with the inside, and the flat plate structure layer mainly has the functions of fixing and supporting.
3. Assembly of cabinet body and back plate
And (3) shaping and milling the cast cabinet body casting and the cast rear plate casting to reach the required size and roughness, and plating and coating to form the final part. The schematic diagram of the cabinet operation is shown in fig. 1, after the rear plate is installed at the back of the cabinet body, the cabinet body sound absorption structure and the rear plate sound absorption structure form three-side surrounding sound absorption environments at the left rear part, the back part and the right rear part in the cabinet, and the sound absorption coefficient is close to 0.5 through test detection. When the 3 sound source generates sound waves in the cabinet, the sound waves are transmitted to the rear space and are transmitted into the left and right conical sound absorption structures and the rear porous sound absorption structure, the sound waves are continuously reflected in the sound absorption structures, and the sound energy is continuously consumed, so that the purposes of sound absorption and noise reduction are achieved.
The reinforced cabinet prepared by the method can absorb noise generated by the internal plug box and reflected sound waves of the cabinet body, avoids the transmission of the noise inside the cabinet to the environment through gaps between the cabinet and the plug box, reduces the noise of the reinforced cabinet filled with the plug box by more than 3dB, and is suitable for the environment which is assembled with high-power-consumption equipment, high temperature and is sensitive to noise index requirements.
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments and the disclosure of the drawings.
Claims (4)
1. A local porous honeycomb structure low noise reinforcement rack which characterized in that: the novel multifunctional cabinet comprises a cabinet body and a rear plate, wherein the rear plate is fixedly connected with the rear side of the cabinet body; the cabinet body is of a sand casting integrated structure, and porous conical sound absorption pit structures are densely distributed on the inner wall of the cabinet body at the positions of the left middle rear part and the right middle rear part; the rear plate is of a pressurized seepage casting integrated forming structure and comprises an outer plate layer and an inner sound absorption structure layer, wherein the inner sound absorption structure layer is of a foaming honeycomb sound absorption structure; the porous conical sound absorption pits at the middle rear parts of the left side and the right side of the cabinet body and the foam honeycomb sound absorption structure at the inner side of the rear plate form a sound absorption effect area surrounded by three surfaces at the middle rear part in the cabinet;
the porous conical sound absorption pit structure is provided with a top aperture of 2mm, a hole height of 10mm, a hole spacing of 2.8mm and a hole pattern drawing angle of 5 DEG, wherein the local porosity is 60%;
the cabinet body is formed in the following mode:
firstly, preparing a cabinet type core investment pattern for manufacturing a sand mold according to the external dimension of a reinforced cabinet, wherein the cabinet type core investment pattern is made of paraffin, and parting the investment pattern according to the use condition of the cabinet, and consists of a wax type upper core and a wax type lower core; the wax-type upper core is arranged at the front part of the cabinet body and mainly has the functions of an upper plug box of the cabinet and an assembly area of zero/accessories; the lower wax-type core is arranged at the rear part of the cabinet body and has the main function of a cable routing area in the cabinet;
step 2, after trimming the investment pattern, preparing a primary sand mold by using the investment pattern through a paraffin casting method, wherein the primary sand mold comprises an upper core sand mold and a lower core sand mold; after hardening, adopting a milling mode to remove materials from two sides of the inner sand mould;
step 3, respectively placing the prefabricated two ceramic molds at two material removing parts on two sides of a lower core sand mold, adhering the prefabricated two ceramic molds with the lower core sand mold through casting glue or fastening the prefabricated two ceramic molds with screws, and then closing the prefabricated two ceramic molds with an upper core sand mold to form a casting mold of a cabinet body; the ceramic mold is prepared by adopting a 3D printing forming technology by taking high-temperature-resistant ceramic as a base material, and the formed mold consists of a flat plate and conical protrusions densely distributed on the inner side of the flat plate, wherein the flat plate is used as a support for fixing, the length and width dimensions are the same as the material removing dimensions in the lower core sand mold after repairing, and the thickness is smaller than the material removing thickness; the diameter of the bottom of the conical bulge is 2mm, the height is 10mm, the interval is 2.8mm, and the die drawing angle is 5 degrees.
2. The locally porous honeycomb structured low noise reinforced cabinet of claim 1, wherein: the foaming honeycomb sound absorption structure is communicated with the inside of the foam honeycomb sound absorption structure with the porosity of 60-70%, the aperture of 1.6-2mm and the thickness of 20mm.
3. The locally porous honeycomb structured low noise reinforced cabinet of claim 1, wherein: the rear plate adopts the following forming mode:
the casting mould used for the back plate molding comprises a pressurizing pressure head and a casting mould, wherein the pressurizing pressure head is aligned up and down with the inner cavity of the casting mould, the inner cavity of the casting mould is used for adding molten metal, the bottom of the casting mould is provided with an inner cavity, and an overflow hole is arranged below the inner cavity, and the inner cavity is used for filling particles of a prefabricated particle porous body;
the method comprises the following forming steps:
step 1, after an overflow hole is plugged by a plug, pouring particles into a concave cavity at the bottom of a casting mold, heating, compacting by using a pressurizing pressure head, and prefabricating the porous body of the particles, wherein the thickness of the porous body of the prefabricated particles is 20mm;
step 2, after removing the overflow hole plugs, injecting molten metal into the inner cavity of the casting mold, using a pressurizing pressure head to pressurize the liquid, enabling the molten metal to fully flow into the prefabricated particle porous body, cooling, and removing the casting mold to obtain a casting prefabricated body;
and step 3, placing the casting preform in an ultrasonic water bath, melting and removing NaCl particles to obtain the rear plate casting.
4. A partially porous honeycomb structured low noise reinforced cabinet according to claim 3, wherein: the particles of the prefabricated particle porous body are NaCl, and the diameter of the particles is 1.6-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211555417.5A CN116456639B (en) | 2022-12-06 | 2022-12-06 | Low noise reinforcement cabinet with local porous honeycomb structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211555417.5A CN116456639B (en) | 2022-12-06 | 2022-12-06 | Low noise reinforcement cabinet with local porous honeycomb structure |
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| CN116456639A CN116456639A (en) | 2023-07-18 |
| CN116456639B true CN116456639B (en) | 2024-02-23 |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319971A (en) * | 2008-07-01 | 2008-12-10 | 南通大学 | Preparation method of paraffin organization chip |
| RU2009100607A (en) * | 2009-01-11 | 2010-07-20 | Институт машиноведения и металлургии ДВО РАН (RU) | METHOD FOR MANUFACTURE OF SHELL CASES IN CASTING ON CASTED MODELS FOR FILLING WITHOUT SUPPORT FILLER |
| KR20110132112A (en) * | 2010-06-01 | 2011-12-07 | 엔알티 주식회사 | Method for manufacturing aluminum vacuum chamber |
| CN205584695U (en) * | 2016-04-01 | 2016-09-14 | 天津七所精密机电技术有限公司 | High power rack with design of novel wind path |
| CN107626887A (en) * | 2017-09-20 | 2018-01-26 | 北京星航机电装备有限公司 | A kind of forming method of the wax-pattern of Intermediate Gray interlayer cavity |
| CN207540115U (en) * | 2017-06-19 | 2018-06-26 | 广州锐劲特空调设备有限公司 | A kind of cabinet air conditioner denoising device |
| CN208445131U (en) * | 2018-07-19 | 2019-01-29 | 深圳延浩科技有限公司 | A kind of hermetically sealed dust-protection type high voltage power distributing cabinet |
| CN110722102A (en) * | 2019-11-07 | 2020-01-24 | 洛阳双瑞精铸钛业有限公司 | Mold for large-scale titanium alloy precision investment casting and preparation method of shell |
| WO2020095205A1 (en) * | 2018-11-09 | 2020-05-14 | 3M Innovative Properties Company | Blanking panels including acoustic absorbing materials |
| CN212183973U (en) * | 2020-06-18 | 2020-12-18 | 安擎(天津)计算机有限公司 | Noise reduction cabinet for server |
| CN214706654U (en) * | 2020-12-25 | 2021-11-12 | 南京佳盛机电器材制造有限公司 | Novel shielding noise reduction cabinet |
| CN216625068U (en) * | 2021-12-30 | 2022-05-27 | 江苏中自电气技术有限公司 | Fireproof heat-dissipation low-voltage power electric cabinet |
| CN114845532A (en) * | 2022-05-23 | 2022-08-02 | 中国船舶集团有限公司第七二三研究所 | Compact high-efficient general cooling liquid cooling subrack |
| CN217226544U (en) * | 2022-01-17 | 2022-08-19 | 上海飞裕蜡业有限公司 | Wax injection mold for producing knitted wax rings |
| CN114945263A (en) * | 2022-05-23 | 2022-08-26 | 中国船舶集团有限公司第七二三研究所 | High-efficient heat dissipation silence airtight liquid cooling rack |
-
2022
- 2022-12-06 CN CN202211555417.5A patent/CN116456639B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319971A (en) * | 2008-07-01 | 2008-12-10 | 南通大学 | Preparation method of paraffin organization chip |
| RU2009100607A (en) * | 2009-01-11 | 2010-07-20 | Институт машиноведения и металлургии ДВО РАН (RU) | METHOD FOR MANUFACTURE OF SHELL CASES IN CASTING ON CASTED MODELS FOR FILLING WITHOUT SUPPORT FILLER |
| KR20110132112A (en) * | 2010-06-01 | 2011-12-07 | 엔알티 주식회사 | Method for manufacturing aluminum vacuum chamber |
| CN205584695U (en) * | 2016-04-01 | 2016-09-14 | 天津七所精密机电技术有限公司 | High power rack with design of novel wind path |
| CN207540115U (en) * | 2017-06-19 | 2018-06-26 | 广州锐劲特空调设备有限公司 | A kind of cabinet air conditioner denoising device |
| CN107626887A (en) * | 2017-09-20 | 2018-01-26 | 北京星航机电装备有限公司 | A kind of forming method of the wax-pattern of Intermediate Gray interlayer cavity |
| CN208445131U (en) * | 2018-07-19 | 2019-01-29 | 深圳延浩科技有限公司 | A kind of hermetically sealed dust-protection type high voltage power distributing cabinet |
| WO2020095205A1 (en) * | 2018-11-09 | 2020-05-14 | 3M Innovative Properties Company | Blanking panels including acoustic absorbing materials |
| CN110722102A (en) * | 2019-11-07 | 2020-01-24 | 洛阳双瑞精铸钛业有限公司 | Mold for large-scale titanium alloy precision investment casting and preparation method of shell |
| CN212183973U (en) * | 2020-06-18 | 2020-12-18 | 安擎(天津)计算机有限公司 | Noise reduction cabinet for server |
| CN214706654U (en) * | 2020-12-25 | 2021-11-12 | 南京佳盛机电器材制造有限公司 | Novel shielding noise reduction cabinet |
| CN216625068U (en) * | 2021-12-30 | 2022-05-27 | 江苏中自电气技术有限公司 | Fireproof heat-dissipation low-voltage power electric cabinet |
| CN217226544U (en) * | 2022-01-17 | 2022-08-19 | 上海飞裕蜡业有限公司 | Wax injection mold for producing knitted wax rings |
| CN114845532A (en) * | 2022-05-23 | 2022-08-02 | 中国船舶集团有限公司第七二三研究所 | Compact high-efficient general cooling liquid cooling subrack |
| CN114945263A (en) * | 2022-05-23 | 2022-08-26 | 中国船舶集团有限公司第七二三研究所 | High-efficient heat dissipation silence airtight liquid cooling rack |
Non-Patent Citations (2)
| Title |
|---|
| 加压渗流铸造多孔铝合金及其吸声性能;许庆彦, 陈玉勇, 李庆春;铸造(04);2-5 * |
| 新型蜂窝陶瓷的研制(Ⅰ);胡定军, 陈义胜, 宋希文, 贺友多;包头钢铁学院学报(01);34-37 * |
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