CN113290202A - Precoated sand production equipment - Google Patents
Precoated sand production equipment Download PDFInfo
- Publication number
- CN113290202A CN113290202A CN202110563750.XA CN202110563750A CN113290202A CN 113290202 A CN113290202 A CN 113290202A CN 202110563750 A CN202110563750 A CN 202110563750A CN 113290202 A CN113290202 A CN 113290202A
- Authority
- CN
- China
- Prior art keywords
- sand
- supporting column
- rolling
- roller
- conveyor belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004576 sand Substances 0.000 title claims abstract description 73
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 210000002489 tectorial membrane Anatomy 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000009490 roller compaction Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
- B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
- B22C5/0422—Devices having a fixed receptable with rotating tools, some or all of these tools being rolls or balls loosely mounted on their axis or loose balls in contact with the side wall or the bottom of the receptacle, e.g. with aerating means; "Devices of the Muller type"
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
- B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
- B22C5/0472—Parts; Accessories; Controlling; Feeding; Discharging; Proportioning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses precoated sand production equipment which is provided with a mounting frame, wherein a heating device is arranged on the mounting frame, a sand mixing device is arranged below the heating device, an outlet section of the heating device is positioned right above a feeding section of the sand mixing device, a rolling device is arranged below the sand mixing device, and a placing bin is arranged at the output end of the rolling device.
Description
Technical Field
The invention relates to the technical field of precoated sand production, in particular to precoated sand production equipment.
Background
The precoated raw sand refers to the molding raw sand or core raw sand with a layer of solid resin film attached to the surface of the raw sand particles before molding. There are two film-coating processes of cold method and hot method: dissolving the resin with ethanol by cold method, adding urotropine during mixing the raw sand to coat the urotropine on the surface of the raw sand grains, and volatilizing the ethanol to obtain a raw sand coating film; the hot method is that the raw sand is preheated to a certain temperature, resin is added to melt the raw sand, the resin is stirred to coat the surface of the raw sand particles, urotropine aqueous solution and lubricant are added, and the raw sand is cooled, crushed and screened to obtain the coated raw sand which is used for casting steel parts and iron parts. Because the precoated sand film has the advantages of high strength, low gas generation, high size precision of produced castings, smooth surface, convenient preservation and the like, the precoated sand film is increasingly widely applied in recent years;
in the production process of the precoated sand, the raw sand needs to be heated to 130-plus-150 ℃ and then enters a sand mixer, when the precoated sand is mixed, circulating water is used for continuously cooling, the temperature needs to be reduced to below 110 ℃ before a strengthening agent, the existing mixer is not provided with an effective cooling device, so that the production efficiency is reduced, and the precoated sand can be bonded into a mass and adhered to the inner wall of the mixer due to the fact that auxiliary materials are sticky after the precoated sand is finished.
Disclosure of Invention
The invention aims to provide precoated sand production equipment to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a precoated sand production device is provided with a mounting frame, a heating device is arranged on the mounting frame, a sand mixing device is arranged below the heating device, an outlet section of the heating device is positioned right above a feeding section of the sand mixing device, the sand mixing device comprises a tank body, spiral cooling tanks are uniformly arranged on the outer side wall of the tank body from top to bottom, a cooling protective shell is further sleeved outside the tank body and matched with the cooling tanks, water tanks are further arranged beside the tank body, water inlets are arranged at the upper ends of the side walls of the water tanks, water outlets are arranged at the lower ends of the side walls of the water tanks and connected with the tops of the cooling tanks through connecting pipes, the water inlets are connected with the bottoms of the cooling tanks through connecting pipes, a bottom rotary table in the tank body is uniformly provided with spiral stirring sheets, scraping plates are further arranged on the side surfaces of the rotary table, and are attached to the inner wall of the tank body, the roller compaction device is arranged below the sand mulling device, and a placing bin is arranged at the output end of the roller compaction device.
Preferably, the heating device comprises two triangular supports which are oppositely arranged, a rotating heating cylinder is arranged between the triangular supports, a rotating rod is axially arranged in the rotating heating cylinder, and stirring plates are arranged on the rotating rod in an staggered manner.
Preferably, a conveying device is arranged between the sand mixing device and the rolling device, the conveying device comprises a first supporting column, a second supporting column and a third supporting column, a first conveying belt is arranged on the upper portion of the first supporting column and the upper portion of the second supporting column, a second conveying belt is arranged on the middle portion of the first supporting column and the middle portion of the third supporting column, the first supporting column, the second supporting column and the third supporting column are sequentially arranged, the first conveying belt is arranged above the second conveying belt, holes are uniformly formed in the first conveying belt, one end of the first conveying belt is connected with the output end of the sand mixing device, the other end of the first conveying belt is connected with the rolling device, the mixed precoated sand can be conveniently conveyed, and the precoated sand which is not coagulated together can leak to the second conveying belt from the holes in the first conveying belt, the coated sand is conveyed into the placing bin through the second conveying belt, and the large coated sand which is coagulated together cannot leak onto the second conveying belt through the holes in the first conveying belt and is conveyed into the rolling device through the first conveying belt to be ground.
Preferably, rolling machine includes the box, be equipped with first roller and the second roller of rolling on the two relative inner walls of arbitrary in the box respectively, first roller with the second roller cooperation of rolling realizes smashing, first roller with the second is rolled the roller below and is equipped with the filter screen, the filter screen below is equipped with the slide rail that the slope set up, the slide rail pierces through the box sets up, just the slide rail outer end is connected place the storehouse, first roller with the second rolls the roller and will condense tectorial membrane sand together and pulverize, then leaks the slide rail through the filter screen, then carries and places in the storehouse, and does not roll complete tectorial membrane sand and pulverize once more.
Preferably, a temperature display is further arranged in the sand mulling device.
Compared with the prior art, the invention has the beneficial effects that: the inner wall of the sand mixing device is provided with the cooling tank, the cooling tank is connected with the water tank through the connecting pipe, when the temperature needs to be reduced, water in the water tank enters the cooling tank, the temperature reduction speed can be accelerated through heat exchange, the production efficiency is improved, meanwhile, the scraping plate is arranged in the sand mixing device, precoated sand adhered to the inner wall of the sand mixing device can be scraped, the production efficiency is improved, the mechanical life is prolonged, the conveying device and the rolling device are further arranged, the adhered and agglomerated precoated sand can be crushed, the production efficiency is improved, and the production quality is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of a sand mulling apparatus of the present invention;
fig. 3 is a cross-sectional view of the rolling compaction apparatus of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected through the insides of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1: the utility model provides a tectorial membrane sand production facility, is equipped with mounting bracket 1, be equipped with heating device 2 on the mounting bracket 1, heating device 2 includes the triangular supports 13 of two relative settings, be equipped with between the triangular supports 13 and rotate heating cylinder 14, the axial is equipped with dwang 15 in rotating heating cylinder 14, the crisscross stirring board 16 that is equipped with on the dwang 15, 2 below of heating device are equipped with mulling device 3, 2 export sections of heating device are located directly over 3 feed sections of mulling device, as shown in FIG. 2: the sand mulling device 3 comprises a tank body 4, spiral cooling grooves 5 are uniformly formed in the outer side wall of the tank body 4 from top to bottom, a cooling protective shell 6 is sleeved outside the tank body 4, the cooling protective shell 6 is matched with the cooling grooves 5, a water tank 7 is further arranged beside the tank body 4, a water inlet is formed in the upper end of the side wall of the water tank 7, a water outlet is formed in the lower end of the side wall of the water tank 7, the water outlet is connected with the top of the cooling grooves 5 through a connecting pipe, the water inlet is connected with the bottom of the cooling grooves 5 through a connecting pipe, a rotary disc 8 is arranged at the bottom in the tank body 4, spiral stirring sheets 9 are uniformly arranged on the rotary disc 8, a scraper 10 is further arranged on the side surface of the rotary disc 8, the scraper 10 is attached to the inner wall of the tank body 4, a temperature display is further arranged in the sand mulling device 3, and a rolling device 11 is arranged below the sand mulling device 3, a conveying device 17 is arranged between the sand mixing device 3 and the rolling device 11, the conveying device 17 comprises a first supporting column 18, a second supporting column 19 and a third supporting column 20, a first conveying belt 21 is arranged on the upper portion of the first supporting column 18 and the upper portion of the second supporting column 19, a second conveying belt 22 is arranged on the middle portion of the first supporting column 18 and the middle portion of the third supporting column 20, the first supporting column 18, the second supporting column 19 and the third supporting column 20 are sequentially arranged, the first conveying belt 21 is arranged above the second conveying belt 22, holes are uniformly formed in the first conveying belt 21, one end of the first conveying belt 21 is connected with the output end of the sand mixing device 3, the other end of the first conveying belt 21 is connected with the rolling device 11, so that the mixed precoated sand can be conveyed conveniently, the precoated sand which is not coagulated can leak to the second conveying belt 22 from the holes in the first conveying belt 21, the coated sand which is conveyed into the placing bin 12 through the second conveyor belt 22 cannot leak to the second conveyor belt 22 through the holes on the first conveyor belt 21 for being coagulated together, and is conveyed into the rolling device 11 through the first conveyor belt 21 for being crushed, as shown in fig. 3: the output end of the rolling device 11 is provided with a placing bin 12, the rolling device 11 comprises a box body 23, a first rolling roller 24 and a second rolling roller 25 are arranged on any two opposite inner walls in the box body 23 respectively, the first rolling roller 24 and the second rolling roller 25 are matched to realize crushing, a filter screen 26 is arranged below the first rolling roller 24 and the second rolling roller 25, the side wall of the box body 23 is provided with an opening to take out the filter screen 26 from the box body, a slide rail 27 which is obliquely arranged is arranged below the filter screen 26, the slide rail 27 penetrates through the box body 23, the outer end of the slide rail 27 is connected with the placing bin 12, the first rolling roller 24 and the second rolling roller 25 crush the film-coated sand which is condensed together, then the film-coated sand leaks to the slide rail 27 through the filter screen and is conveyed to the placing bin 12, and the film-coated sand which is not rolled completely is taken out from the filter screen, and (6) grinding again.
Claims (5)
1. The utility model provides a tectorial membrane sand production facility which characterized in that: the sand mulling device is characterized by being provided with a mounting rack (1), wherein a heating device (2) is arranged on the mounting rack (1), a sand mulling device (3) is arranged below the heating device (2), an outlet section of the heating device (2) is positioned right above a feeding section of the sand mulling device (3), the sand mulling device (3) comprises a tank body (4), a spiral cooling tank (5) is uniformly arranged on the outer side wall of the tank body (4) from top to bottom, a cooling protective shell (6) is sleeved outside the tank body (4), the cooling protective shell (6) is matched with the cooling tank (5), a water tank (7) is arranged beside the tank body (4), a water inlet is arranged at the upper end of the side wall of the water tank (7), a water outlet is arranged at the lower end of the side wall of the water tank (7), the water outlet is connected with the top of the cooling tank (5) through a connecting pipe, and the water inlet is connected with the bottom of the cooling tank (5) through a connecting pipe, bottom carousel (8) in the jar body (4), evenly be equipped with heliciform stirring piece (9) on carousel (8), still be equipped with scraper blade (10) on carousel (8) side surface, just scraper blade (10) laminating jar body (4) inner wall, mulling device (3) below is equipped with rolling device (11), rolling device (11) output is equipped with places storehouse (12).
2. The precoated sand production apparatus according to claim 1, characterized in that: heating device (2) are including two triangular supports (13) that set up relatively, be equipped with rotation heating cylinder (14) between triangular support (13), axial is equipped with dwang (15) in rotation heating cylinder (14), crisscross stirring board (16) of being equipped with on dwang (15).
3. The precoated sand production apparatus according to claim 1, characterized in that: a conveying device (17) is arranged between the sand mixing device (3) and the rolling device (11), the conveying device (17) comprises a first supporting column (18), a second supporting column (19) and a third supporting column (20), a first conveyor belt (21) is arranged at the upper part of the first supporting column (18) and the upper part of the second supporting column (19), a second conveyor belt (22) is arranged in the middle of the first supporting column (18) and the middle of the third supporting column (20), and the first supporting column (18), the second supporting column (19) and the third supporting column (20) are arranged in sequence, the first conveyor belt (21) being arranged above the second conveyor belt (22), holes are uniformly arranged on the first conveyor belt (21), one end of the first conveyor belt (21) is connected with the output end of the sand mixing device (3), the other end of the first conveyor belt (21) is connected with the rolling device (11).
4. The precoated sand production apparatus according to claim 1, characterized in that: rolling device (11) include box (23), be equipped with first roller (24) and the second roller (25) of rolling on the two relative inner walls of arbitrary in box (23) respectively, first roller (24) of rolling with the second roller (25) cooperation of rolling realizes smashing, first roller (24) of rolling with the second roller (25) of rolling is equipped with filter screen (26) below, filter screen (26) below is equipped with slide rail (27) that the slope set up, slide rail (27) pierce through box (23) sets up, just slide rail (27) outer end is connected place storehouse (12).
5. The precoated sand production apparatus according to claim 1, characterized in that: and a temperature display is also arranged in the sand mixing device (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110563750.XA CN113290202A (en) | 2021-05-24 | 2021-05-24 | Precoated sand production equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110563750.XA CN113290202A (en) | 2021-05-24 | 2021-05-24 | Precoated sand production equipment |
Publications (1)
Publication Number | Publication Date |
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CN113290202A true CN113290202A (en) | 2021-08-24 |
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ID=77324113
Family Applications (1)
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CN202110563750.XA Pending CN113290202A (en) | 2021-05-24 | 2021-05-24 | Precoated sand production equipment |
Country Status (1)
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CN (1) | CN113290202A (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011224599A (en) * | 2010-04-16 | 2011-11-10 | Sintokogio Ltd | Cooling device of casting sand, and recovery treatment facility of casting sand |
WO2016199498A1 (en) * | 2015-06-11 | 2016-12-15 | 新東工業株式会社 | Molding sand regeneration method and regenerating device |
CN206882699U (en) * | 2017-06-28 | 2018-01-16 | 保定畅途金属制品有限公司 | A kind of well lid foundry sand processor |
CN109261894A (en) * | 2018-11-13 | 2019-01-25 | 江苏锐美汽车零部件有限公司 | A kind of New energy automobile motor casing sand core production proportioning process and its implementation |
CN209477214U (en) * | 2018-12-07 | 2019-10-11 | 中车长江铜陵车辆有限公司 | A kind of coated sand mixer |
CN211304667U (en) * | 2019-12-27 | 2020-08-21 | 常州伯特利环保科技有限公司 | Even add fever type roller mill of mix |
CN111590020A (en) * | 2020-06-02 | 2020-08-28 | 无锡市康晖机械制造有限公司 | Precoated sand mixer |
CN112275999A (en) * | 2020-11-02 | 2021-01-29 | 江门市新会区新宜五金制品有限公司 | Sand mixing device is used in hardware casting processing |
CN112475220A (en) * | 2020-10-29 | 2021-03-12 | 芜湖锋珉信息科技有限公司 | Molding sand casting is with dustless processing recovery unit of molding sand |
-
2021
- 2021-05-24 CN CN202110563750.XA patent/CN113290202A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011224599A (en) * | 2010-04-16 | 2011-11-10 | Sintokogio Ltd | Cooling device of casting sand, and recovery treatment facility of casting sand |
WO2016199498A1 (en) * | 2015-06-11 | 2016-12-15 | 新東工業株式会社 | Molding sand regeneration method and regenerating device |
CN206882699U (en) * | 2017-06-28 | 2018-01-16 | 保定畅途金属制品有限公司 | A kind of well lid foundry sand processor |
CN109261894A (en) * | 2018-11-13 | 2019-01-25 | 江苏锐美汽车零部件有限公司 | A kind of New energy automobile motor casing sand core production proportioning process and its implementation |
CN209477214U (en) * | 2018-12-07 | 2019-10-11 | 中车长江铜陵车辆有限公司 | A kind of coated sand mixer |
CN211304667U (en) * | 2019-12-27 | 2020-08-21 | 常州伯特利环保科技有限公司 | Even add fever type roller mill of mix |
CN111590020A (en) * | 2020-06-02 | 2020-08-28 | 无锡市康晖机械制造有限公司 | Precoated sand mixer |
CN112475220A (en) * | 2020-10-29 | 2021-03-12 | 芜湖锋珉信息科技有限公司 | Molding sand casting is with dustless processing recovery unit of molding sand |
CN112275999A (en) * | 2020-11-02 | 2021-01-29 | 江门市新会区新宜五金制品有限公司 | Sand mixing device is used in hardware casting processing |
Non-Patent Citations (1)
Title |
---|
秦升益: "新型覆膜砂专用混砂机", 《铸造》 * |
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Application publication date: 20210824 |
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