CN212264440U - Precoated sand preparation system - Google Patents
Precoated sand preparation system Download PDFInfo
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- CN212264440U CN212264440U CN202020535442.7U CN202020535442U CN212264440U CN 212264440 U CN212264440 U CN 212264440U CN 202020535442 U CN202020535442 U CN 202020535442U CN 212264440 U CN212264440 U CN 212264440U
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Abstract
The utility model discloses a precoated sand preparation system, which comprises a raw sand supply mechanism, wherein the raw sand supply mechanism is used for supplying raw sand to the next process after preheating the raw sand; the first mixing mechanism comprises a heat-preservation tank and a first stirring assembly, and the inlet end of the heat-preservation tank is used for receiving preheated raw sand supplied by the raw sand supply mechanism; the first mixing mechanism is used for mixing the high-temperature additive and the raw sand so as to obtain pre-mixed sand. The application provides a tectorial membrane sand preparation system, simple structure is reasonable, preparation low cost, installation convenient to use, and area is little, and production efficiency is high. By adopting the sectional film covering mode, the limitation and influence among all the working sections are small, the synchronous working can be carried out, and the production efficiency of the precoated sand is greatly improved. Simultaneously in the production process, the temperature of what of each workshop section can accurate control, can effectual improvement tectorial membrane sand's product quality.
Description
Technical Field
The utility model relates to a tectorial membrane sand production facility technical field especially relates to a tectorial membrane sand preparation system.
Background
Coated sand (coated sand). The surface of the sand grains is covered with a layer of molding sand or core sand of solid resin film before molding. There are two film-coating processes of cold method and hot method: dissolving the resin with ethanol by a cold method, adding urotropine in the sand mixing process to coat the urotropine and the sand on the surface of sand grains, and volatilizing the ethanol to obtain precoated sand; the heat method is to preheat the sand to a certain temperature, add resin to melt the sand, stir the sand to coat the resin on the surface of the sand, add urotropine water solution and lubricant, cool, crush and screen the sand to obtain the precoated sand. The method is used for steel castings and iron castings.
The hot method film covering process is that the raw sand is heated to a certain temperature, then the raw sand is respectively mixed and stirred with the resin, the urotropine aqueous solution and the calcium stearate, and the raw sand is cooled, crushed and screened to obtain the product. The process for preparing precoated sand by a thermal method in the prior art is basically as follows, after raw sand is heated to a temperature slightly higher than the melting point of resin (95-105 ℃), the heated raw sand is transferred into a container with a heat preservation and stirring device, additives such as resin and the like are added into the container while stirring, the additives such as resin and the like are attached to the surface of the raw sand, then water is sprayed for cooling, and curing agent aqueous solution is sprayed at the final stage for continuously cooling until the sand is discharged at 50 ℃.
Since the optimum reaction temperatures for different additives are different, mixing and cooling, if carried out in the same vessel, requires repeated increases and decreases in the vessel temperature. Therefore, it is difficult to accurately adjust the temperature when the additive is added, which is one of the reasons why it is difficult to ensure the same quality of the precoated sand. Further, since the container temperature is raised by repeating the cycle, it is necessary to preheat the container if the container temperature at the start of the cycle does not reach the predetermined temperature, and it is necessary to cool the container if the container temperature at that time is higher than the predetermined temperature. It can be seen that there are many problems in mixing and cooling in the same container, for example, the time required for repeatedly heating and cooling affects the production efficiency, the temperature is not easy to control, and a large amount of energy is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model provides a tectorial membrane sand preparation system.
The utility model provides a following scheme:
a coated sand production system, comprising:
the raw sand supply mechanism is used for preheating raw sand and then supplying the preheated raw sand to the next process;
the first mixing mechanism comprises a heat-preservation tank and a first stirring assembly, and the inlet end of the heat-preservation tank is used for receiving preheated raw sand supplied by the raw sand supply mechanism; the first mixing mechanism is used for mixing the high-temperature additive and the raw sand so as to obtain pre-mixed sand;
the second mixing mechanism comprises a cooling tank and a second stirring assembly, and the inlet end of the cooling tank is used for receiving the pre-mixed sand supplied by the discharge port of the heat preservation tank; the second mixing mechanism is used for mixing the low-temperature additive and the pre-mixed sand so as to obtain the precoated sand.
Preferably: the raw sand supply mechanism comprises a quantitative sand storage tank and a heating assembly, the quantitative sand storage tank supplies raw sand to the heating assembly through a first guide assembly, and the heating assembly supplies preheated raw sand to the heat preservation tank through a second guide assembly.
Preferably: and a heat insulation layer is formed on the outer side of the heat insulation tank, and a heater is arranged in the heat insulation layer.
Preferably: the heater includes an electric heating wire.
Preferably: the cooling tank is externally formed with a cooler.
Preferably: a notch is formed in the wall of the cooling tank, and an exhaust assembly is arranged in the notch.
Preferably: the heat-preserving tank is positioned above the cooling tank in the vertical direction, and the discharge port of the heat-preserving tank is opposite to the inlet end of the cooling tank in the vertical direction.
Preferably: and a first electric valve is arranged at a discharge port of the heat-preserving tank.
Preferably: and a box body for collecting the precoated sand is arranged below the discharge port of the cooling tank.
Preferably: and a second electric valve is arranged at the discharge port of the cooling tank.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
through the utility model, a precoated sand preparation system can be realized, and in one implementation mode, the system can comprise a raw sand supply mechanism which is used for supplying raw sand to the next process after preheating the raw sand; the first mixing mechanism comprises a heat-preservation tank and a first stirring assembly, and the inlet end of the heat-preservation tank is used for receiving preheated raw sand supplied by the raw sand supply mechanism; the first mixing mechanism is used for mixing the high-temperature additive and the raw sand so as to obtain pre-mixed sand; the second mixing mechanism comprises a cooling tank and a second stirring assembly, and the inlet end of the cooling tank is used for receiving the pre-mixed sand supplied by the discharge port of the heat preservation tank; the second mixing mechanism is used for mixing the low-temperature additive and the pre-mixed sand so as to obtain the precoated sand. The application provides a tectorial membrane sand preparation system, simple structure is reasonable, preparation low cost, installation convenient to use, and area is little, and production efficiency is high. By adopting the sectional film covering mode, the limitation and influence among all the working sections are small, the synchronous working can be carried out, and the production efficiency of the precoated sand is greatly improved. Simultaneously in the production process, the temperature of what of each workshop section can accurate control, can effectual improvement tectorial membrane sand's product quality.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a precoated sand preparation system provided by an embodiment of the present invention.
In the figure: the quantitative sand storage tank comprises a quantitative sand storage tank 1, a first guide assembly 2, a heating assembly 3, a second guide assembly 4, a heat preservation tank 5, a first stirring assembly 6, a cooling tank 7, a second stirring assembly 8, a heater 9, an exhaust assembly 10, a first electric valve 11, a tank body 12, a second electric valve 13, a high-temperature additive A and a low-temperature additive B.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
Examples
Referring to fig. 1, in order to provide a precoated sand preparation system according to an embodiment of the present invention, as shown in fig. 1, the system includes a raw sand supply mechanism, and the raw sand supply mechanism is used for supplying raw sand to a next process after preheating the raw sand; further, the raw sand supply mechanism comprises a quantitative sand storage tank 1 and a heating assembly 3, the quantitative sand storage tank 1 supplies raw sand to the heating assembly 3 through a first guide assembly 2, and the heating assembly 3 supplies preheated raw sand to the heat preservation tank 5 through a second guide assembly 4.
The first mixing mechanism comprises a heat-preservation tank 5 and a first stirring assembly 6, and the inlet end of the heat-preservation tank 5 is used for receiving preheated raw sand supplied by the raw sand supply mechanism; the first mixing mechanism is used for mixing the high-temperature additive and the raw sand so as to obtain pre-mixed sand;
a second mixing mechanism, which comprises a cooling tank 7 and a second stirring assembly 8, wherein the inlet end of the cooling tank 7 is used for receiving the pre-mixed sand supplied from the discharge port of the heat-preserving tank 5; the second mixing mechanism is used for mixing the low-temperature additive and the pre-mixed sand so as to obtain the precoated sand.
Further, in order to achieve the heat preservation effect, a heat preservation layer is formed on the outer side of the heat preservation tank 5, and a heater 9 is arranged in the heat preservation layer. When the heater 9 is selected, the heater 9 includes an electric heating wire. The heating wire has the advantages of convenient installation, high heating rate, easy temperature control and the like.
Further, the cooling tank 7 is formed with a cooler on the outside. And a gap is formed on the wall of the cooling tank 7, and an exhaust assembly 10 is arranged in the gap.
To facilitate the transfer of sand in the system, the holding tank is vertically above the cooling tank, and the discharge port of the holding tank is vertically opposite to the inlet port of the cooling tank. And a first electric valve 11 is arranged at the discharge port of the heat-preserving tank 5.
In order to collect the formed precoated sand, a box body 12 for collecting the precoated sand is arranged below the discharge port of the cooling tank. The discharge of the cooling tank 7 is provided with a second electrically operated valve 13.
In the following detailed description of the system provided in the present application, it should be noted that the system provided in the present application may further include any necessary controller and other necessary auxiliary components. The sand storage tank provided by the system can be a sand storage tank with a quantitative function, and the amount of the raw sand stored in the sand storage tank just meets the amount of the raw sand required by one-time production, so that the dosage of various additives can be controlled more easily in the process of film coating. The heating assembly is used for pre-heating the raw sand to a set temperature, and the set temperature can be determined according to the coating temperature required by the high-temperature additive, for example, if the high-temperature additive comprises a resin additive, the pre-set temperature is required to reach 170 ℃. And the preheated raw sand enters the heat-preserving tank through the second guide assembly after the heating is finished, and a film coating process of the resin additives is finished in the heat-preserving tank. The specific process is that, after the preheated raw sand enters the heat-preserving tank, the first stirring assembly is started to stir the raw sand, at the moment, an original piece such as a temperature sensor can be provided to carry out real-time monitoring on the temperature of the sand in the heat-preserving tank, the temperature of the sand in the heat-preserving tank is kept constant in the optimum temperature of the high-temperature additive in a natural cooling or heater heating mode, the high-temperature additive is poured into the heat-preserving tank, for example, the resin additive and the like, and the premixed sand can be obtained through stirring for a certain time. After the pre-mixing sand process is finished, the first electric valve is opened, the pre-mixing sand can directly enter the cooling tank, the temperature of the pre-mixing sand is quickly reduced to the optimal mixing temperature of the low-temperature additive through the provided cold zone device, and then various low-temperature additives such as a hardening agent such as hexamethylenetetramine (hexamethylenetetramine) and calcium stearate (stekal) and a lubricating agent are added into the cooling tank, so that the film coating process of the low-temperature additive is finished under the stirring function of the second stirring assembly. The water vapor generated in the cooling process can be rapidly discharged from the cooling tank through the exhaust assembly. The second mixing mechanism may reduce the time required to cool the sand and may reduce the processing time. Further, since additives such as a hardener and a lubricant can be added in a state of reliably lowering the temperature of the sand and determining the temperature of the sand, the quality of the foundry sand can be stabilized.
It is conceivable that the raw sand supply means may synchronously heat the raw sand required for the next process in the process of premixing with the first mixing means, and the first mixing means may also synchronously coat the high-temperature additive in the process of operating the second mixing means.
In a word, the tectorial membrane sand preparation system that this application provided, simple structure is reasonable, preparation low cost, installation convenient to use, and area is little, and production efficiency is high. By adopting the sectional film covering mode, the limitation and influence among all the working sections are small, the synchronous working can be carried out, and the production efficiency of the precoated sand is greatly improved. Simultaneously in the production process, the temperature of what of each workshop section can accurate control, can effectual improvement tectorial membrane sand's product quality.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A precoated sand production system, characterized by comprising:
the raw sand supply mechanism is used for preheating raw sand and then supplying the preheated raw sand to the next process;
the first mixing mechanism comprises a heat-preservation tank and a first stirring assembly, and the inlet end of the heat-preservation tank is used for receiving preheated raw sand supplied by the raw sand supply mechanism; the first mixing mechanism is used for mixing the high-temperature additive and the raw sand so as to obtain pre-mixed sand;
the second mixing mechanism comprises a cooling tank and a second stirring assembly, and the inlet end of the cooling tank is used for receiving the pre-mixed sand supplied by the discharge port of the heat preservation tank; the second mixing mechanism is used for mixing the low-temperature additive and the pre-mixed sand so as to obtain the precoated sand.
2. The precoated sand preparation system according to claim 1, wherein the raw sand supply mechanism includes a quantitative sand storage tank that supplies raw sand to the heating assembly via a first guide assembly, and a heating assembly that supplies preheated raw sand to the holding tank via a second guide assembly.
3. The precoated sand preparation system according to claim 1, wherein an insulating layer is formed on the outer side of the insulating tank, and a heater is disposed in the insulating layer.
4. The coated sand production system as claimed in claim 3, wherein the heater comprises an electric heating wire.
5. The precoated sand preparation system according to claim 1, wherein the cooling tank is externally formed with a cooler.
6. The precoated sand preparation system according to claim 5, wherein a notch is formed in a tank wall of the cooling tank, and an exhaust assembly is disposed in the notch.
7. The precoated sand preparation system according to claim 1, wherein the heat-retaining tank is located vertically above the cooling tank, and a discharge port of the heat-retaining tank is vertically opposed to an inlet port of the cooling tank.
8. The precoated sand preparation system according to claim 7, wherein a discharge port of the heat-insulating tank is provided with a first electrically operated valve.
9. The precoated sand preparation system according to claim 1, wherein a tank for collecting precoated sand is provided below a discharge port of the cooling tank.
10. The coated sand preparation system according to claim 9, wherein a discharge port of the cooling tank is provided with a second electrically operated valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020535442.7U CN212264440U (en) | 2020-04-13 | 2020-04-13 | Precoated sand preparation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020535442.7U CN212264440U (en) | 2020-04-13 | 2020-04-13 | Precoated sand preparation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212264440U true CN212264440U (en) | 2021-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020535442.7U Active CN212264440U (en) | 2020-04-13 | 2020-04-13 | Precoated sand preparation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212264440U (en) |
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2020
- 2020-04-13 CN CN202020535442.7U patent/CN212264440U/en active Active
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