CN111774526A - Precoated sand production method and production line - Google Patents
Precoated sand production method and production line Download PDFInfo
- Publication number
- CN111774526A CN111774526A CN202010587651.0A CN202010587651A CN111774526A CN 111774526 A CN111774526 A CN 111774526A CN 202010587651 A CN202010587651 A CN 202010587651A CN 111774526 A CN111774526 A CN 111774526A
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- precoated sand
- sand
- temperature
- mixing
- cooling
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- 239000004576 sand Substances 0.000 title claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 53
- 238000001816 cooling Methods 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 43
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 239000000314 lubricant Substances 0.000 claims abstract description 12
- 239000000110 cooling liquid Substances 0.000 claims abstract description 11
- 230000001050 lubricating effect Effects 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000002826 coolant Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 210000002489 tectorial membrane Anatomy 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 70
- 239000003570 air Substances 0.000 description 11
- 239000003110 molding sand Substances 0.000 description 11
- 210000000078 claw Anatomy 0.000 description 7
- 239000006004 Quartz sand Substances 0.000 description 6
- 239000010453 quartz Substances 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004904 shortening 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
- B22C5/08—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
-
- 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
-
- 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
-
- 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
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a precoated sand production method and a production line, belonging to the technical field of precoated sand production, which can improve the production efficiency of a precoated sand production line and ensure the production quality at the same time, and when the mixing temperature of precoated sand does not reach a first set temperature, cooling liquid is added according to the actual measurement temperature of precoated sand to reduce the mixing time so as to reduce the temperature to a second set temperature; and adding a lubricant in the lubricating and stirring stage, and performing air cooling to enable the temperature of the coated sand to be below a third set temperature.
Description
Technical Field
The invention belongs to the technical field of precoated sand production, and particularly relates to a production method and a production line of precoated sand.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The inventor finds that in the production process of the precoated sand, certain redundant time is required to be reserved due to different arrangement and specific regulation of the working procedures, but the redundant time affects the production efficiency of the production line.
For example, in the production process of the coated sand, the raw sand needs to be heated to 130-150 ℃ and then enters a sand mixer, the temperature is continuously reduced by using circulating water during mixing and coating, the temperature needs to be reduced to below 110 ℃ before a curing agent, the temperature generally needs about 70 seconds due to different equipment cooling effects, the curing agent is blown and cooled by using a blower after the curing agent is added, about 50 seconds are needed, and the raw sand is stirred for about 30 seconds after the lubricant is added so that the temperature is below 85 ℃ before sand can be discharged. Under the condition of time allocation, the amount of the precoated sand produced in unit time is constant, and the production efficiency can be further improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a precoated sand production method and a production line, which can improve the production efficiency of the precoated sand production line and ensure the production quality.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the technical scheme of the invention provides a production method of precoated sand, when the mixing temperature of the precoated sand does not reach a first set temperature, cooling liquid is added according to the actual measurement temperature of the precoated sand to reduce the mixing time, so that the temperature is reduced to a second set temperature; and adding a lubricant in the lubricating and stirring stage, and then performing air cooling to enable the temperature of the precoated sand to be below a third set temperature.
As a further technical scheme, the production method specifically comprises the following steps:
preparing materials and heating to form precoated sand in a first state;
mixing the precoated sand in the first state for a first set time, wherein the mixing temperature of the precoated sand does not reach the first set temperature, and adding a cooling liquid to cool for a second set time to obtain the precoated sand in the second state;
adding a curing agent into the precoated sand in the second state, cooling and blowing for a third set time, adding a lubricant, cooling and blowing for a fourth set time to obtain precoated sand in a third state;
conveying the precoated sand in the third state to a crushing sieve, and conveying the precoated sand to a cooling sorting sieve after vibration crushing;
and (6) sand production.
As a further technical solution, the first set time is 50 seconds.
As a further technical solution, the second set time is 8 seconds.
As a further technical solution, the third setting time is longer than the fourth setting time.
In a second aspect, the technical scheme of the invention also provides a precoated sand production line, which comprises a heating furnace, a mixing furnace and a sand discharging device, and is characterized in that the discharging device comprises a crushing screen, the mixing furnace is arranged at the discharging end of the heating furnace, the mixing furnace is also communicated with an auxiliary material warehouse, the crushing screen is arranged at the discharging end of the mixing furnace, and the crushing screen is provided with a water cooling pipeline.
The technical scheme of the invention has the following beneficial effects:
1) according to the invention, the cooling liquid is used for assisting the cooling of the molding sand so as to shorten the mixing time, and the air cooling is used for assisting the lubricating and stirring step, so that the improvement of the two steps can improve the production efficiency of the precoated sand production line and ensure the production quality at the same time.
2) In the invention, because the temperature reduction range of the clean water is large, the solidification and cooling stage can be finished only by 30 seconds, and the time of the fixed cooling stage is shortened.
3) In the invention, the third set time is longer than the fourth set time, the air cooling is utilized to assist the cooling of the lubricating and stirring stage, and the lubricating oil is added in the lubricating and stirring step, so that the weight of the precoated sand is increased, and the air cooling is used without worrying about the wind damage to the aggregation degree of the precoated sand.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram showing the production steps and production time in the background art,
FIG. 2 is a schematic representation of production steps versus production time according to one or more embodiments of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced in the background art, aiming at the defects in the prior art, the invention aims to provide a precoated sand production method and a production line, which can improve the production efficiency of the precoated sand production line and ensure the production quality.
Example 1
In a typical embodiment of the invention, a production method of precoated sand is disclosed, when the mixing temperature of the precoated sand does not reach a first set temperature, cooling liquid is added according to the actual measurement temperature of the precoated sand to reduce the mixing time, so that the temperature is reduced to a second set temperature; and adding a lubricant in the lubricating and stirring stage, and performing air cooling to enable the temperature of the coated sand to be below a third set temperature.
More specifically, the method comprises the following steps:
preparing materials and heating to form precoated sand in a first state;
mixing the precoated sand in the first state for a first set time, wherein the mixing temperature of the precoated sand does not reach the first set temperature, and adding a cooling liquid to cool for a second set time to obtain the precoated sand in the second state;
adding a curing agent into the precoated sand in the second state, cooling and blowing for a third set time, adding a lubricant, and cooling and blowing for a fourth set time;
conveying the precoated sand in the second state to a crushing sieve, and conveying the precoated sand to a cooling sorting sieve after vibration crushing;
and (6) sand production.
In a more typical production scenario, the above production steps are detailed as follows:
1) mixing raw materials meeting the formula requirements, wherein the raw materials of the common precoated sand are quartz stones, so that in the step, the quartz sands with various meshes can be mixed, and a sand mixer can be generally adopted for pre-mixing sand;
2) conveying a plurality of quartz sands into a heating furnace for heating, wherein the heating temperature is 130-150 ℃, continuously stirring for mixing treatment, heating while stirring in the heating furnace until the temperature of the quartz sands reaches 130-150 ℃, and then conveying into a mixing furnace;
3) continuously stirring the quartz sand in a mixing furnace, adding auxiliary materials, and mixing the quartz sand and the auxiliary materials by utilizing the residual temperature of the quartz sand; regarding the auxiliary material added to the quartz sand, the specific components thereof are not shown in this example;
4) adding quartz sand and auxiliary materials into a mixing furnace for 30 seconds, mixing for 50 seconds, adding clear water when the temperature is not more than 110 ℃, adding a certain amount of clear water according to the actual measurement temperature to rapidly cool, reducing the temperature to 100 ℃, and shortening the mixing and laminating time;
5) the cooling range of the clear water is large, so that the time required by the solidification and cooling stage is shortened, and specifically, the clear water is added for use for 8 seconds, the curing agent is added for use for 8 seconds, and the cooling air is blown for use for 30 seconds;
6) after adding the lubricant, entering a lubrication stirring stage, wherein the adding of the lubricant takes 8 seconds, the stirring takes 5 seconds, and the air cooling takes 10 seconds; the cooling is carried out within 30 seconds originally, and the blower is started within 10 seconds to increase the cooling effect by using air cooling; finally, the coarse sand is less than 85 degrees.
The temperature in the above steps can be obtained by the existing laser temperature measurement means.
7) Conveying the coarse sand in the step 6) to a crushing screen for vibration crushing to eliminate quartz sand agglomeration, then air-cooling to room temperature, and packaging and storing.
From the above description of the steps, it can be known that the first set time is 50 seconds; the second set time is 8 seconds; the third set time is greater than the fourth set time; the first set temperature is 110 ℃; the second set temperature is 100 ℃; the third set temperature is 85 ℃; the cooling liquid is water.
Example 2
The invention discloses a precoated sand production line, which is produced by using the precoated sand production method in the embodiment 1 and comprises a heating furnace, a mixing furnace and a sand discharging device, wherein the discharging device comprises a crushing screen, the mixing furnace is arranged at the discharging end of the heating furnace, the mixing furnace is also communicated with an auxiliary material warehouse, the crushing screen is arranged at the discharging end of the mixing furnace, and the crushing screen is provided with a water cooling pipeline.
The mixing furnace in the embodiment comprises a furnace body with a circular cross section, wherein a cavity is formed in the furnace body, and a stirring claw is arranged in the furnace body and connected with a rotary power source; a plurality of bulges are arranged between the stirring claw and the inner surface of the furnace body, and gaps are reserved between a rotating body formed by a space swept by the stirring claw in the rotating process and the bulges; the plurality of bulges are uniformly arranged on the inner surface of the furnace body.
The plurality of protrusions are all located on the same horizontal plane; at least two of the plurality of protrusions are positioned on different horizontal planes; the bulges are plate-shaped, and each bulge inclines relative to the bottom surface of the furnace body.
Each protrusion is provided with a tip, and the tip faces to the central axis of the furnace body.
The furnace body comprises a cylindrical outer wall and a bottom surface connected to the bottom side of the outer wall; the cavity in the furnace body is a cylindrical cavity, and the precoated sand can be stirred by the stirring claws in the furnace body; a plurality of stirring claws are arranged and are connected with the rotating roller, and in order to fix the rotating roller, a mounting seat is connected above the furnace body; the rotating roller is connected with the mounting seat through a bearing.
Because the bulge is of a plough share type, the plough share also has the characteristic that when the plough share ploughs, the tip of the plough share can go deep into the soil, so that the soil moves upwards along the plough share.
When the rotary stirring device is used, the power source drives the rotary roller and the stirring claw to rotate in the furnace body, and the stirring claw can stir molding sand in any radial direction through stirring in different radial positions, so that hardened molding sand is crushed, the uniform particle of the molding sand is ensured, and the agglomeration of a binder is prevented; simultaneously bellied existence has guaranteed that the molding sand also can the rolling over in the axial, realizes the homogeneous mixing of molding sand and molding sand binder under the effect that constantly stirs and rolls, improves the degree of consistency and work efficiency of mixing.
The broken sieve in this embodiment, including cooling medium pipe, flow line, water valve and broken shale shaker, the cooling medium pipe includes a plurality ofly, and a plurality of cooling medium pipe hang in the inside of broken shale shaker, or hug closely the below of broken shale shaker screen cloth with a plurality of cooling medium pipe, and the equal parallel arrangement of a plurality of cooling pipeline, flow line is connected at a plurality of cooling medium pipe both ends, and flow line is equipped with the valve in order to control the coolant liquid flow.
More specifically, in this embodiment, the cooling medium pipe is used to cool the surrounding environment, so that the cooling medium pipe can exchange heat with the surrounding environment during the cooling process, and in order to improve the heat exchange efficiency, the cooling liquid in the cooling medium pipe is cooled after heat exchange occurs. In the case of using water as the cooling liquid, the cooling method adopted for the water in this embodiment is to discharge the water after heat exchange to a water tank for natural cooling.
The cooling medium pipe comprises a bottom layer cooling medium pipe for cooling bottom layer molding sand and an upper layer cooling medium pipe for cooling upper layer molding sand; more specifically, in the present embodiment, neither the bottom-layer cooling medium pipe nor the upper-layer cooling medium pipe is in direct contact with the molding sand, but the temperature of the molding sand is indirectly lowered by lowering the temperature of the ambient air and the crushing vibrating screen.
It can be understood that when adding clear water, curing agent and lubricant to the coarse sand, the coarse sand is in the mixing furnace; or when the curing agent is added and the lubricant is added, the coarse sand is positioned in the cooling device.
Clean water can be added into the mixing furnace or the cooling device through the water pump and a water pipe communicated with the water pump.
The air can be blown into the mixing furnace or the cooling device through the blower and a pipeline communicated with the blower.
The cooling device comprises a containing bin, and the containing bin is provided with a sand inlet and a sand outlet; a pipeline for cooling is arranged in the accommodating bin between the sand inlet and the sand outlet; the bottom surface of the accommodating bin is provided with a first opening for air inlet, and the first opening is communicated with the blower; the top surface of the containing bin is provided with a second opening used for balancing wind pressure, and the air return pipe is connected with the second opening.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (10)
1. A production method of precoated sand is characterized in that when the mixing temperature of the precoated sand does not reach a first set temperature, cooling liquid is added according to the actual measurement temperature of the precoated sand to reduce the mixing time, so that the temperature is reduced to a second set temperature; and adding a lubricant in the lubricating and stirring stage, and then performing air cooling to enable the temperature of the precoated sand to be below a third set temperature.
2. The precoated sand production method according to claim 1, comprising the steps of:
preparing materials and heating to form precoated sand in a first state;
mixing the precoated sand in the first state for a first set time, wherein the mixing temperature of the precoated sand does not reach the first set temperature, and adding a cooling liquid to cool for a second set time to obtain the precoated sand in the second state;
adding a curing agent into the precoated sand in the second state, cooling and blowing for a third set time, adding a lubricant, cooling and blowing for a fourth set time to obtain precoated sand in a third state;
conveying the precoated sand in the third state to a crushing sieve, and conveying the precoated sand to a cooling sorting sieve after vibration crushing;
and (6) sand production.
3. The precoated sand production method according to claim 2, wherein the first set time is 50 seconds.
4. A precoated sand producing method according to claim 2, wherein said second set time is 8 seconds.
5. A coated sand producing method as claimed in claim 2, wherein said third set time is longer than said fourth set time.
6. The coated sand production method as claimed in claim 1, wherein the first set temperature is 110 ℃.
7. The coated sand production method as claimed in claim 1, wherein the second set temperature is 100 degrees celsius.
8. The coated sand production method as claimed in claim 1, wherein the third set temperature is 85 degrees celsius.
9. The method of claim 1, wherein the coolant is water.
10. The utility model provides a tectorial membrane sand production line, includes heating furnace, mixing furnace and goes out the sand device, its characterized in that, discharging device includes the broken sieve, the mixing furnace sets up the discharge end of heating furnace, mixing furnace still communicate the auxiliary material storehouse, and the broken sieve sets up the discharge end of mixing furnace, water cooling pipeline are installed to the broken sieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010587651.0A CN111774526B (en) | 2020-06-24 | 2020-06-24 | Precoated sand production method and production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010587651.0A CN111774526B (en) | 2020-06-24 | 2020-06-24 | Precoated sand production method and production line |
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| Publication Number | Publication Date |
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| CN111774526A true CN111774526A (en) | 2020-10-16 |
| CN111774526B CN111774526B (en) | 2022-08-19 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785709A (en) * | 2015-04-30 | 2015-07-22 | 成都桐林铸造实业有限公司 | Precoated sand for casting and preparation method thereof |
| CN205165723U (en) * | 2015-11-19 | 2016-04-20 | 河南天祥新材料股份有限公司 | Tectorial membrane sand sand blender |
| CN109590432A (en) * | 2019-01-31 | 2019-04-09 | 宁波华铸环保科技有限公司 | A kind of precoated sand production line |
| CN109622881A (en) * | 2019-01-31 | 2019-04-16 | 宁波华铸环保科技有限公司 | A kind of precoated sand production control method |
| CN109822042A (en) * | 2019-01-31 | 2019-05-31 | 宁波华铸环保科技有限公司 | A kind of kneading machine |
| CN210676824U (en) * | 2019-11-01 | 2020-06-05 | 青岛宜泰源铸造材料有限公司 | Tectorial membrane sand air cooling device |
-
2020
- 2020-06-24 CN CN202010587651.0A patent/CN111774526B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785709A (en) * | 2015-04-30 | 2015-07-22 | 成都桐林铸造实业有限公司 | Precoated sand for casting and preparation method thereof |
| CN205165723U (en) * | 2015-11-19 | 2016-04-20 | 河南天祥新材料股份有限公司 | Tectorial membrane sand sand blender |
| CN109590432A (en) * | 2019-01-31 | 2019-04-09 | 宁波华铸环保科技有限公司 | A kind of precoated sand production line |
| CN109622881A (en) * | 2019-01-31 | 2019-04-16 | 宁波华铸环保科技有限公司 | A kind of precoated sand production control method |
| CN109822042A (en) * | 2019-01-31 | 2019-05-31 | 宁波华铸环保科技有限公司 | A kind of kneading machine |
| CN210676824U (en) * | 2019-11-01 | 2020-06-05 | 青岛宜泰源铸造材料有限公司 | Tectorial membrane sand air cooling device |
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| CN111774526B (en) | 2022-08-19 |
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Denomination of invention: A production method and production line for coated sand Effective date of registration: 20231225 Granted publication date: 20220819 Pledgee: Weihai Commercial Bank Co.,Ltd. Linyi Branch Pledgor: Linyi MaoYuan New Material Technology Co.,Ltd. Registration number: Y2023980073797 |