CN110805371B - Method for machining civil air defense door hinged support - Google Patents
Method for machining civil air defense door hinged support Download PDFInfo
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- CN110805371B CN110805371B CN201911067238.5A CN201911067238A CN110805371B CN 110805371 B CN110805371 B CN 110805371B CN 201911067238 A CN201911067238 A CN 201911067238A CN 110805371 B CN110805371 B CN 110805371B
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- layer
- hinge base
- air defense
- steel
- civil air
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D9/00—Flaps or sleeves specially designed for making from particular material, e.g. hoop-iron, sheet metal, plastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/01—Flasks; Accessories therefor for vacuum-sealed moulding
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- 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
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Securing Of Glass Panes Or The Like (AREA)
Abstract
The invention discloses a method for processing a civil air defense door hinged support. The invention improves the steel casting process, selects dry quartz sand without adhesive and additive by controlling the thickness of the coating material, adopts a double-structure sand box, is provided with air holes and a leakage net, prevents gravel from entering a vacuum chamber, ensures the control of gas tension scale during casting and forming, further improves the characteristics of the steel, reduces the air hole defects of the steel in the casting process, improves the quality of the steel, fundamentally improves the quality of the core layer steel, ensures the stability of the steel, adopts a protective layer to ensure that the core layer still plays a role of fixing after the core layer is broken, the periphery of the flexible layer is protected by using firm materials, the firmness of the door hinge base is guaranteed again, the safety is improved, the door hinge base is convenient to install and use, the stabilizing layer is added to further stabilize the base of the door hinge base, and the combination between the door hinge base and a wall body is further enhanced.
Description
Technical Field
The invention relates to the technical field of manufacturing of civil air defense door accessories, in particular to a method for machining a civil air defense door hinge base.
Background
The civil air defense is also called civil air defense, is a measure for preventing air-raid and disaster relief, implements rescue action, prevents and lightens activities of disaster hazard, the civil air defense door belongs to civil air defense protective equipment, the civil air defense door is a door of a civil air defense engineering entrance and exit, the classification of the civil air defense door is more distinct, and the civil air defense door comprises a common single-leaf protective sealed door, a double-leaf protective sealed door, a sealed door and various other civil air defense equipment, a movable door threshold single-leaf protective sealed door, a double-leaf protective sealed door, a sealed door and the like, a door hinge seat is an accessory of the civil air defense door, a door leaf of the civil air defense door is connected with a door frame through a door hinge, a door hinge leaf is fixed through a door hinge seat, the hinge seat is a supporting hinge of an arc door, the hinge seat is rotatably opened and closed through a hinge at the end and bears water pressure and is transmitted to a gate pier, the hinge seat is a key spare part used for the arc door leaf.
At present people's air defense door uses more for people's air defense door hanging plate free bearing, and hanging plate free bearing connects hanging plate hinge page or leaf one end, and the hanging plate hinge page or leaf other end is connected with the hanging plate, and the hanging plate free bearing is fixed on the door leaf, and the hanging plate can bear very big power when receiving the strong impact of external force, and the hanging plate free bearing is too big and the fracture easily, consequently needs the stability of strengthening door free bearing, the toughness of material.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a method for processing a civil air defense door hinge base, wherein the toughness of the material of the civil air defense door hinge base is improved from the processing technology of the civil air defense door hinge base, impurities generated in the material casting process are reduced, a protective layer is added on the performance of the internal casting material, a stabilizing layer is added on the structure, the stability of the civil air defense door hinge base is improved from the inside and the outside, the process complexity is reduced, the durability and the toughness of the door hinge base are improved, the door hinge base is not easy to break, and the product quality is improved.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a civil air defense door hinge base processing method, which comprises a core layer, a protective layer and a stabilizing layer, wherein the key technical method of each link is as follows:
A. core layer: the core layer is a core assembly part which is cast by taking steel as a raw material through a series of processes and comprises a model and a template, coating film heating, vacuumizing, placing a sand box, adding sand into the sand box, coating film on the top surface of the sand box, vacuumizing the sand box, pouring in a mould assembling manner, shakeout and cleaning;
B. protective layer: the protective layer utilizes the protective layer to protect the core layer once more on the basis that the shaping of core layer core group formed the hinge seat, plays the potential safety hazard that prevents the fracture and lead to, reduces the harm of external factor to the core layer, and the protective layer contains two-layer structure of pliability layer and firm layer again, wherein:
a. flexible layer: the flexible layer is arranged between the solid layer and the core layer and is made of soft rubber materials and used for reducing friction between the core layer and the solid layer, meanwhile, the rubber materials used by the flexible layer are high in elasticity and play a role in shaping, the phenomenon that a door leaf is inclined to the couch after the core layer is damaged is avoided, potential safety hazards exist, the flexible layer is provided with a plurality of round holes, the diameter of each round hole is 3mm, the heat dissipation effect is achieved, and the opening size of a part is improved;
b. a solid layer: the firm layer is arranged on the outer surface of the flexible layer, exposed in the air and made of a toughened material made of a special synthetic material, so that the effect of protecting the flexible layer and the core layer is achieved, the firm layer is provided with two round holes, the diameter of each round hole is 4-5mm, and the round holes are not on the same horizontal plane, so that the opening size of the part is improved;
C. a stabilizing layer: the firm layer one side is set for at the hinge seat least significant end, and the another side is pre-buried in mixing the earth wall, and firm layer material is located position between hinge seat least significant end and the bottom screw, does not influence the screw fixation, and the width equals with hinge seat width, through electric power connection, strengthens the hinge seat and mixes being connected between the earth, strengthens the stability ability of hinge seat, makes hinge seat and wall be connected more firmly.
As a preferable technical scheme of the invention, the core layer is made of steel with the model number of ZG 270-500.
As a preferable technical scheme of the invention, the film is made of EVA material, and the thickness is 0.05-0.15 mm.
As a preferred technical scheme of the invention, in the step of the model and the template, the edges and key parts of the model are provided with air holes, and the air holes are directly communicated with the template bearing cavity.
As a preferred technical scheme of the invention, in the vacuumizing step, quick-drying paint is sprayed on the model after the film is softened.
As a preferred technical scheme of the invention, the sand box is of a double-layer box wall structure, a vacuum layer is arranged between double-layer box walls, air holes are formed in the inner wall of the sand box, and a leakage net is arranged at the top ends of the air holes.
As a preferred technical scheme of the invention, the sand box is filled with dry quartz sand without adhesive and additive.
In a preferred embodiment of the present invention, the solid layer is made of SMC composite material.
As a preferred technical scheme of the invention, the stabilizing layer is made of an electromagnet.
Compared with the prior art, the invention has the following beneficial effects:
1: the invention improves the steel casting process, selects dry quartz sand without adhesive and additives by controlling the thickness of the coating material, adopts a double-structure sand box, is provided with air holes and a leakage net, prevents gravel from entering a vacuum chamber, ensures the grasp of gas tension scale during casting and forming, and then improves the compactness of the steel, reduces the air hole defects of the steel in the casting process, improves the quality of the steel material, fundamentally improves the quality of core layer steel, and ensures the stability, flexibility and firmness of the steel.
2: adopt the protective layer, set up pliable and tough layer and firm layer, pliable and tough layer is provided with a plurality of apertures, and the pliability and the elasticity of material ensure the protection to the core layer, ensure that the core layer still plays the fixed action after taking place the state of breaking, prevent that the door leaf from because losing the phenomenon that supports the inclined to one side couch that appears, use acid-proof firm material to protect again in the periphery of pliable and tough layer, guarantee the sturdiness ability of door hinge seat once more, reinforcing security, the installation and use of being convenient for.
3: the invention also increases the further basement stabilization effect of the stabilizing layer on the hinged door support, adopts electromagnetic force, is arranged in concrete, is arranged at the lowest end of the hinged door support and is positioned between the screws, and further strengthens the combination between the hinged door support and the wall body by utilizing the electromagnetic effect on the premise of not influencing bolt fixation, thereby facilitating the installation of the door leaf and leading the force bearing effect of the civil air defense door to be better.
Detailed Description
The invention provides a civil air defense door hinge base processing method, which comprises a core layer, a protective layer and a stabilizing layer, wherein the key technical method of each link is as follows:
A. core layer: the core layer is made of steel material and is made up through a series of casting processes including mould and template, heating, vacuumizing, putting sand box, adding sand into the sand box, coating film on top surface of sand mould, vacuumizing, pouring in mould assembling, shakeout and cleaning, and features no addition of adhesive, water and other additives, low labour, high sand utilization rate up to 95%, sealing the sand box with plastic film, and vacuum pumping to soften plastic film, after the film is softened, immediately starting a vacuum device to work to enable the softened film to be adsorbed on the model, pumping air in the laminated bearing plate and the model by the vacuum device to enable the film to be tightly attached to the model to form a bearing plate for filling sand, spraying quick-drying paint on the model, continuously acting on a model bearing plate by vacuum suction, placing a sand box around the model and at the top end of the film, filling dry quartz sand into the sand box, moving a vibrating table to compact the molding sand in the sand box and scratch off the sand surface, placing a dead head mould sample, laying a plastic film on the sand surface for sealing, pumping air in the molding sand by an air pumping valve to form internal and external pressure difference, enabling the molded mould to have higher hardness, coating a layer of film on the top surface of the sand mould again, not needing heating and softening, playing a sealing role, manually connecting a sprue cup with a straight pouring gate, and pumping vacuum to the sand box, releasing the vacuum degree of the model bearing plate, compacting sand in the sand mold under the action of atmospheric pressure, keeping the original shape, separating the sand mold from the model to obtain a drawing mold, producing an upper mold and a lower mold by the same method, combining the upper mold and the lower mold to form a whole cavity which is lined by a plastic film, relieving the vacuum in the template, injecting positive pressure into the template to obtain the drawing mold, continuously vacuumizing, then lowering a core, combining the molds and pouring, cooling after molding, gradually reducing the negative pressure to form pressure difference, automatically collapsing the sand mold, performing heat treatment on the casting after sand falling, reducing the problem of uneven surface carbon content, recycling the sand, and cleaning the casting;
B. protective layer: the protective layer utilizes the protective layer to protect the core layer once more on the basis that the shaping of core layer group core formed the hinge seat, and the soft material of protective layer is convenient for reduce the friction between core layer and the firm layer, protects the life of foundry goods, plays the potential safety hazard that prevents to split and lead to, reduces the harm of external factor to the core layer, and the protective layer includes flexible layer and two-layer structure of firm layer again, wherein:
a. flexible layer: the flexible layer is arranged between the solid layer and the core layer and is made of soft rubber materials and used for reducing friction between the core layer and the solid layer, meanwhile, the flexible layer is made of rubber materials, the rubber materials have the advantages of water resistance, large elasticity, good sealing effect and good plasticity, the flexible layer plays a shaping role by utilizing the advantage of large elasticity, the door leaf cannot be deflected to a couch after the core layer is prevented from being damaged, potential safety hazards exist, the flexible layer is provided with a plurality of round holes, the diameter of each round hole is 3mm, the heat dissipation effect is achieved, the stretching size of a part is improved, and the formed flexible layer is sleeved outside the core layer;
b. a solid layer: the firm layer is positioned on the outer surface of the flexible layer and exposed in the air, the effect of protecting the flexible layer and the core layer is achieved by adopting a toughened material made of a special synthetic material, the surface of the material is smooth and round, and is not easy to scratch an installer, the firm layer is provided with two round holes, the diameter of each hole is 4-5mm, the round holes are not on the same horizontal plane, the tensile size of a part is improved, the firm layer is subjected to heating treatment by using strong glue, and the firm layer and the flexible layer are firmly bonded;
C. a stabilizing layer: one side of the stabilizing layer is set at the lowest end of the door hinge base, the other side of the stabilizing layer is embedded in the concrete wall, the stabilizing layer is made of a material positioned between the lowest end of the door hinge base and a bottom screw, a point magnetic stripe is adopted and is strip-shaped, so that the attraction effect between magnets is facilitated, the screw fixation is not influenced, the width is equal to the width of the door hinge base, the connection between the door hinge base and the concrete is strengthened through electric connection, the stability of the door hinge base is enhanced, and the connection between the door hinge base and the wall surface is more stable;
the core layer is made of ZG270-500 steel, ZG270-500 is a category of medium carbon cast steel, has certain toughness and plasticity, higher strength and hardness, good machinability and good weldability, and because of the special strength and hardness of the ZG270-500 steel, the core layer is convenient to improve the strength and hardness of the core layer as a material of the hinge seat of the civil air defense door, and the phenomena of shrinkage cavity and shrinkage porosity in the steel need to be reduced in the process, so that the quality of the ZG270-500 steel is improved.
The film is made of EVA (ethylene vinyl acetate) with the thickness of 0.05-0.15mm, the EVA is a plastic material consisting of ethylene (E) and Vinyl Acetate (VA), can be biodegraded, cannot cause damage to the environment when being discarded or burned, is low in price, light in weight, good in shock resistance and buffering performance, heat insulation, heat preservation, cold resistance and low-temperature performance, can resist severe cold and solarization, has a good sound insulation effect, a sealed cell structure, does not absorb water, is good in moisture resistance and water resistance, resists corrosion of chemicals such as seawater, grease, acid, alkali and the like, is antibacterial, nontoxic, pollution-free, has good flexibility and high plastic deformation rate, is convenient for the requirement of subsequent processes on softening and deformation of the film, is soft and light in weight, and has a certain benefit on preventing carburetion and ensuring the size accuracy of the thinner film by adopting 0.1mm, thus improving the precision of the casting and reducing the formation of air holes, and when the casting is softened, the EVA film needs to be heated at the constant speed, and the heating temperature is 120-160 ℃.
In the steps of the model and the template, air holes are formed in the edge and key positions of the model and are directly communicated with a template bearing cavity, an inlet is arranged at the top end, an outlet is arranged in a horizontal position, the air holes are formed in the turning position of a casting, the pouring process adopts a method of firstly slowing, then speeding and then slowing to pour stably, so that molten metal and gas are prevented from being sprayed out from a riser during pouring, the air holes are utilized to facilitate gas discharge, the feeding capacity is improved, and the quantity of the molten metal air holes is reduced.
The vacuum pumping link, spraying fast drying paint on the model after the film is softened, the fast drying paint is mainly prepared by epoxy resin, antirust pigment with high shielding property, filler, thixotropic agent, antirust additive, curing agent, mixed solvent and the like, has excellent corrosion resistance, has compact structure, good shielding property and excellent anti-permeability performance after being cured due to the molecular chain containing stable carbon-carbon bond, ether bond and benzene ring after the film is formed by the epoxy resin, has water resistance, salt fog resistance and oil resistance, excellent chemical resistance and good adhesive capacity, reacts with free bonds on the metal surface to form firm chemical bonds, greatly enhances the adhesive force of the film, enlarges the adaptability to a substrate, and is a casting auxiliary material which is covered on the surface of a mold core in the casting process to improve the performances of the surface fire resistance, chemical stability, molten metal scouring resistance, sand sticking resistance and the like, the casting material is convenient to improve in an auxiliary mode, the spraying process is uniform, the flow marks are prevented from being accumulated, and the flow marks can be dried immediately.
The sand box is of a double-layer box wall structure, a vacuum layer is arranged between double-layer box walls, air holes are formed in the inner wall of the sand box, a leakage net is arranged at the top end of each air hole and is set to be a two-layer 150-mesh metal net, gas in the sand box of the structure can be conveniently exhausted through the first-layer sand box, fine sand grains and dust are prevented from entering the vacuum layer by the leakage net, the compactness of the sand is ensured, and the rigidity and the strength of the sand box are enhanced.
The dry quartz sand without the adhesive and the additive is filled in the sand box, and can prevent the sand from blocking the exhaust hole due to moisture to cause unsmooth exhaust, keep the smooth exhaust and improve the exhaust of gas in the metal, thereby enhancing the density and reducing the air holes.
The firm layer is made of SMC composite material, the SMC composite material is one of glass fiber reinforced plastics, the main raw material is made of GF (special yarn), MD (filling) and various assistants by mould pressing, the defects of easy aging, easy corrosion, poor insulation, poor cold resistance, poor flame retardance and short service life of wood, steel and plastic are overcome, the composite door hinge seat has absolute sealing and waterproof performance, corrosion resistance, anti-theft electrical performance, no grounding wire, attractive appearance, safety protection of lock and lead seal, long service life and light weight, and the SMC material is used for being wrapped outside the protective layer to protect the material inside the door hinge seat, prevent aging, prolong service life and improve safety performance.
The fixing layer is made of an electromagnet, the electromagnet is a device for generating electromagnetism by electrifying, a conductive winding matched with the power of the electromagnet is wound outside the iron core, the coil which is electrified with current has magnetism like a magnet, the electromagnet is also called as an electromagnet, the electromagnet is usually made into a strip shape or a horseshoe shape, so that the iron core is easier to magnetize, in order to enable the electromagnet to be demagnetized immediately after power failure, the electromagnet is usually made of soft iron or silicon steel materials which are demagnetized quickly, the electromagnet has magnetism when being electrified, the magnetism disappears after the power failure, an electric wire of the electromagnet is connected with an external electric wire to generate magnetic force, and the combination between the door hinge seat and a wall body is strengthened.
A civil air defense door hinge base processing method adopts three aspects to improve a door hinge base, in the process flow, the traditional complex metal processing technology with high carbon content is improved into a physical casting technology with simple operation and environmental protection, molding sand can be recycled, the environmental protection performance is enhanced, a plurality of heat dissipation holes are arranged in a plurality of links to facilitate gas discharge, the quality of a casting is ensured to be improved through the simplification of the technology and the control of details, the strength and the rigidity of a core layer are enhanced, a flexible layer and a protective layer designed by a firm layer are adopted to protect the casting again, the damage and the fracture of an installer are prevented due to rough surface and scratch, the service life of the casting is protected, finally, an electromagnetic force strip is structurally adopted to enhance the connection of the door hinge base and a mixed wall surface, the rigidity of the door hinge base is enhanced, and the stability of the door hinge base is structurally enhanced from external force, thereby improving the bearing capacity of the door hinge seat and improving the product quality.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A civil air defense door hinge base processing method comprises a core layer, a protective layer and a stabilizing layer, and is characterized in that the concrete method of each link is as follows:
A. core layer: taking steel as a raw material, and casting a core assembly part by using a model and a template, coating film heating, vacuumizing, placing a sand box, adding sand into the sand box, coating film on the top surface of the sand box, vacuumizing the sand box, combining the box and pouring, shakeout and cleaning;
B. protective layer: on the basis of core layer core assembly shaping formation hinge seat, utilize the protective layer to protect the core layer once more, the protective layer contains two-layer structure of flexible layer and firm layer again, wherein:
a. flexible layer: the flexible layer is arranged between the solid layer and the core layer and is made of soft rubber, and the flexible layer is provided with a plurality of round holes with the diameter of 3-4 mm;
b. a solid layer: the outer surface of the flexible layer is exposed in the air, the toughened material made of synthetic material is adopted, the firm layer is provided with two round holes, the diameter of each round hole is 4-5mm, and the round holes are not on the same horizontal plane;
C. a stabilizing layer: the firm layer one side is set for at hinge seat least significant end, and the another side is pre-buried in mixing the earth wall, and firm layer material is located position between hinge seat least significant end and the bottom screw, does not influence the screw fixation, and the width equals with hinge seat width, strengthens being connected between hinge seat and the concrete through electric power connection, and firm layer adopts the electro-magnet preparation.
2. The civil air defense door hinge base processing method of claim 1, wherein the core layer is made of steel material with model number ZG 270-500.
3. The method for processing the hinge base of the civil air defense door as claimed in claim 1, wherein the coating is made of EVA with a thickness of 0.05-0.15 mm.
4. The method for processing the hinge base of the civil air defense door as claimed in claim 1, wherein in the process steps of the model and the template, the edge of the model is provided with the air holes which are directly communicated with the cavity of the template bearing plate.
5. The method for processing the hinge base of the civil air defense door as claimed in claim 1, wherein in the vacuum pumping step, the model is sprayed with the quick-drying paint after the film is softened.
6. The method for processing the hinge base of the civil air defense door as claimed in claim 1, wherein the sand box is of a double-layer box wall structure, a vacuum layer is arranged between the double-layer box walls, air holes are formed in the inner wall of the sand box, and a leakage net is arranged at the top ends of the air holes.
7. The method for processing a hinge base of a civil air defense door as claimed in claim 6, wherein the sand box is filled with dry quartz sand without adhesive and additive.
8. The method of claim 1, wherein the rigid layer is made of SMC composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911067238.5A CN110805371B (en) | 2019-11-04 | 2019-11-04 | Method for machining civil air defense door hinged support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911067238.5A CN110805371B (en) | 2019-11-04 | 2019-11-04 | Method for machining civil air defense door hinged support |
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| Publication Number | Publication Date |
|---|---|
| CN110805371A CN110805371A (en) | 2020-02-18 |
| CN110805371B true CN110805371B (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911067238.5A Active CN110805371B (en) | 2019-11-04 | 2019-11-04 | Method for machining civil air defense door hinged support |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0941776A (en) * | 1995-08-02 | 1997-02-10 | Ten Kk | Hinge of door for anechoic chamber |
| CN202249374U (en) * | 2011-08-24 | 2012-05-30 | 杭州钱江人防设备有限公司 | Hinge mechanism for steel structural protective sealed door |
| CN104550716A (en) * | 2014-12-05 | 2015-04-29 | 柳州市正龙机械制造有限公司 | V-method casting process |
| CN207212072U (en) * | 2017-08-24 | 2018-04-10 | 嘉兴巨匠防护设备有限公司 | A kind of closed guard gate's hanging deck free bearing |
-
2019
- 2019-11-04 CN CN201911067238.5A patent/CN110805371B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0941776A (en) * | 1995-08-02 | 1997-02-10 | Ten Kk | Hinge of door for anechoic chamber |
| CN202249374U (en) * | 2011-08-24 | 2012-05-30 | 杭州钱江人防设备有限公司 | Hinge mechanism for steel structural protective sealed door |
| CN104550716A (en) * | 2014-12-05 | 2015-04-29 | 柳州市正龙机械制造有限公司 | V-method casting process |
| CN207212072U (en) * | 2017-08-24 | 2018-04-10 | 嘉兴巨匠防护设备有限公司 | A kind of closed guard gate's hanging deck free bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110805371A (en) | 2020-02-18 |
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