CN110586893A - Novel casting production process for placing chilling blocks in precoated sand - Google Patents
Novel casting production process for placing chilling blocks in precoated sand Download PDFInfo
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- CN110586893A CN110586893A CN201910937112.2A CN201910937112A CN110586893A CN 110586893 A CN110586893 A CN 110586893A CN 201910937112 A CN201910937112 A CN 201910937112A CN 110586893 A CN110586893 A CN 110586893A
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- casting
- chiller
- precoated sand
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
Abstract
The invention relates to the technical field of casting technology, and discloses a novel casting production technology for placing chilling blocks in precoated sand. This place novel casting production technology in tectorial membrane sand in chiller, at the outside parcel tectorial membrane sand of chiller in this technology, it is convenient that the drawing of patterns is after final foundry goods shaping, the chiller takes out easily, it is convenient to get the iron, the chiller is longe-lived, the cost is reduced, according to chiller size computational formula and tectorial membrane sand inner wall thickness calculation formula in this application, the foundry goods does not have the loose that the inside pouring is incomplete to cause, the effect is showing, hundred percent do not have the casting defect, do not have the requirement to the tectorial membrane sand material, ordinary sand can be used, be applicable to any pouring technology, horizontal vertical heat absorption and heat dissipation, user's vexation has been removed from, user's use has been made things convenient for.
Description
Technical Field
The invention relates to the technical field of casting technology, in particular to a novel casting production technology for placing chilling blocks in precoated sand.
Background
Casting is a relatively early metal hot working process mastered by human beings, and has been about 6000 years old, China has entered into the full prime of bronze castings between 1700 and the previous 1000 years of the Gregorian era, and the process has reached a relatively high level, casting is a method of casting liquid metal into a casting cavity matched with the shape of a part, and obtaining the part or a blank after the casting is cooled and solidified, wherein the cast substance is mostly metal (such as copper, iron, aluminum, tin, lead and the like) which is originally in a solid state but is heated to a liquid state, and the material of a casting mold can be sand, metal or even ceramic, and the used method is different according to different requirements.
In traditional casting production technology, ordinary chilling block, graphite chilling block or refractory coating are mostly used and coated into chilling block, the service life of the ordinary chilling block is short, the service life times are unstable, the operation is not easy to master, the taking of iron is inconvenient, the price of the graphite chilling block is high, the cost is high, the refractory coating is coated into chilling block, casting surface wave raised grains are easily caused, the operation is complex, the material is rosin containing alcohol, the environment is not protected, the taking of iron is inconvenient, and a user is quite annoying to the situation, so that the novel casting production technology for placing the chilling block in the precoated sand is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a novel casting production process for placing a chilling block in precoated sand, which has the advantages of low cost, long service life of the chilling block, convenience in iron taking and the like, and solves the problems that in the traditional casting production process, common chilling blocks, graphite chilling blocks or refractory coatings are mostly used for coating the chilling blocks, the common chilling blocks are short in service life, unstable in service life times, difficult to master, inconvenient in iron taking, expensive in graphite chilling blocks, high in cost, and the refractory coatings are coated into the chilling blocks, so that the surface wave patterns of castings are easily caused, the operation is complex, the materials contain alcohol rosin, the environment is not protected, the iron taking is inconvenient, and a user is very annoying.
(II) technical scheme
In order to realize the purposes of low cost, long service life of the cold iron and convenient iron taking, the invention provides the following technical scheme: a novel casting production process for placing chills in precoated sand comprises the following steps:
1) determining the size of the casting;
2) casting a mould, namely manufacturing a corresponding mould by using precoated sand according to the size of a casting, manufacturing the mould by two parts, and closing the mould after the manufacturing is finished to obtain a complete mould 1;
3) manufacturing a cold iron, determining a hot spot part according to product requirements, determining the size of the hot spot part to obtain the cold iron, wherein the size of the hot spot part is equal to the diameter/1.5 of the cold iron, the outer wall of the cold iron is wrapped with precoated sand, and the thickness of the inner wall of the precoated sand is equal to (the diameter of the cold iron is 0.02) +2 to obtain a cold iron part 1;
4) inspecting the complete die 1 to ensure that no sundries exist in the complete die 1 and cleaning dirt;
5) preparing a cold iron piece 1, ensuring that no impurities exist outside the cold iron piece 1, cleaning dirt, drying the cold iron piece 1, and heating the cold iron piece 1 to 50-100 ℃;
6) fixing the cold iron piece 1 at a proper position in the complete mould 1, and casting molten iron into the complete mould 1;
7) and cooling and cleaning, and demolding and removing sand after the setting temperature of the casting is reduced to obtain the casting.
Preferably, the size determination in the step 1 is to determine the size of the casting, the size determination of the casting is accurate to two digits after the decimal point, and the mantissa is rounded.
Preferably, the casting mold in the step 2 is manufactured by using precoated sand according to the size of a casting, the mold is manufactured in two parts, the mold is combined after the manufacturing is finished, and a complete mold 1 is obtained, wherein the precoated sand for manufacturing the corresponding mold is prepared by adding a latent curing agent (urotropine) and a lubricant into thermoplastic phenolic resin through a certain precoating process.
Preferably, the chill is manufactured in the step 3, the hot spot part is determined according to the product requirement, the size of the hot spot part is determined, the chill is manufactured, the size of the hot spot part is equal to the diameter of the chill/1.5, the outer wall of the chill is wrapped with precoated sand, the thickness of the inner wall of the precoated sand is equal to (the diameter of the chill x 0.02) +2, the chill 1 is obtained, the diameter of the chill is accurate to two decimal places, the mantissa is rounded off, and in a calculation formula of the thickness of the inner wall of the precoated sand, the unit of the diameter of the chill is consistent with the unit after 2.
(III) advantageous effects
Compared with the prior art, the invention provides a novel casting production process for placing chilling blocks in precoated sand, which has the following beneficial effects:
1. the novel casting production process comprises the steps of determining the size of a casting and casting a mold, manufacturing a corresponding mold by using precoated sand according to the size of the casting, manufacturing the mold in two parts, combining the two parts after manufacturing to obtain a complete mold 1, manufacturing a chiller, determining a hot spot part according to product requirements, determining the size of the hot spot part to obtain the chiller, wherein the size of the hot spot part is equal to the diameter of the chiller per 1.5, the outer wall of the chiller is wrapped with the precoated sand, the thickness of the inner wall of the precoated sand is equal to (diameter of the chiller) 0.02) +2, obtaining the chiller 1, checking the complete mold 1, ensuring that no sundries and dirt exist in the complete mold 1, preparing the chiller 1, ensuring that no sundries and dirt exist outside the chiller 1, cleaning the dirt, drying the chiller 1, heating the chiller 1 to 50-100 ℃, and fixing the chiller 1 at a proper position in the complete mold 1, the molten iron is poured into the complete die 1, cooling and cleaning are carried out, demolding and sand removal are carried out after the casting forming temperature is reduced, the precoated sand is wrapped outside the chiller in the casting process, demolding is convenient after the final casting is formed, the chiller is easy to take out, iron taking is convenient, the service life of the chiller is long, cost is reduced, looseness caused by incomplete casting inside does not exist in the casting, the effect is obvious, casting defects do not exist in percentage, the precoated sand material is not required, common sand can be used, the method is suitable for any pouring process, transverse and longitudinal heat absorption and heat dissipation are avoided, user trouble is avoided, and the use of a user is facilitated.
2. The novel casting production process for placing the chilling block in the precoated sand comprises the steps of determining the size of a casting through size determination, casting a mold, manufacturing the corresponding mold by using the precoated sand according to the size of the casting, manufacturing the mold by two parts, combining the molds after manufacturing to obtain a complete mold 1, manufacturing the chilling block, determining a hot spot part according to product requirements, determining the size of the hot spot part to obtain the chilling block, wherein the size of the hot spot part is equal to the diameter of the chilling block/1.5, wrapping the outer wall of the chilling block with the precoated sand, the thickness of the inner wall of the precoated sand is equal to (the diameter of the chilling block x 0.02) +2, obtaining the chilling block 1, checking the complete mold 1, ensuring that no sundries exist in the complete mold 1, cleaning dirt, preparing the chilling block 1, ensuring that no sundries exist outside the chilling block 1, cleaning dirt, drying the chilling block 1, heating the chilling block 1 to 50-100 ℃, fixing a cold iron piece 1 at a proper position in a complete mould 1, casting molten iron into the complete mould 1, cooling and cleaning, demoulding and cleaning after the casting shaping temperature is reduced to obtain the casting, wherein precoated sand is wrapped outside the cold iron in the process, the final casting surface has no wavy lines and no empty material defects, the defective rate is reduced, and the cost increase caused by defective products is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.
The first embodiment is as follows: a novel casting production process for placing chills in precoated sand comprises the following steps:
1) determining the size of the casting;
2) casting a mould, namely manufacturing a corresponding mould by using precoated sand according to the size of a casting, manufacturing the mould by two parts, and closing the mould after the manufacturing is finished to obtain a complete mould 1;
3) manufacturing a cold iron, determining a hot spot part according to product requirements, determining the size of the hot spot part to obtain the cold iron, wherein the size of the hot spot part is equal to the diameter/1.5 of the cold iron, the outer wall of the cold iron is wrapped with precoated sand, and the thickness of the inner wall of the precoated sand is equal to (the diameter of the cold iron is 0.02) +2 to obtain a cold iron part 1;
4) inspecting the complete die 1 to ensure that no sundries exist in the complete die 1 and cleaning dirt;
5) preparing a cold iron piece 1, ensuring that no impurities exist outside the cold iron piece 1, cleaning dirt, drying the cold iron piece 1, and heating the cold iron piece 1 to 50-100 ℃;
6) fixing the cold iron piece 1 at a proper position in the complete mould 1, and casting molten iron into the complete mould 1;
7) and cooling and cleaning, and demolding and removing sand after the setting temperature of the casting is reduced to obtain the casting.
Step 1, size determination is carried out, the size of the casting is determined to be accurate to two digits after a decimal point, and the mantissa is rounded.
And 2, casting a mould, namely manufacturing the corresponding mould by using precoated sand according to the size of a casting, manufacturing the mould by two parts, and combining the two parts after the manufacturing is finished to obtain a complete mould 1, wherein the precoated sand for manufacturing the corresponding mould is prepared by adding a latent curing agent (urotropine) and a lubricant into thermoplastic phenolic resin through a certain coating process.
And 3, manufacturing the chiller, determining a hot spot part according to product requirements, determining the size of the hot spot part, and preparing the chiller, wherein the size of the hot spot part is equal to the diameter/1.5 of the chiller, the outer wall of the chiller is wrapped with precoated sand, the thickness of the inner wall of the precoated sand is equal to (the diameter of the chiller is 0.02) +2, so that a chiller part 1 is obtained, the diameter of the chiller is accurate to two digits after a decimal point, the mantissa is rounded off, and in a calculation formula of the thickness of the inner wall of the precoated sand, the unit of the diameter of the chiller is consistent with the unit after 2.
The thickness of the wall of the precoated sand outside the chiller is more than 2, and the thickness of the wall of the precoated sand is less than 2, so that the precoated sand cannot be attached to the surface of the chiller.
Example two: a novel casting production process for placing chills in precoated sand comprises the following steps:
1) determining the size of the casting;
2) casting a mould, namely manufacturing a corresponding mould by using precoated sand according to the size of a casting, manufacturing the mould by two parts, and closing the mould after the manufacturing is finished to obtain a complete mould 1;
3) manufacturing a cold iron, determining a hot spot part according to product requirements, determining the size of the hot spot part to obtain the cold iron, wherein the size of the hot spot part is equal to the diameter/1.5 of the cold iron, the outer wall of the cold iron is wrapped with precoated sand, and the thickness of the inner wall of the precoated sand is equal to (the diameter of the cold iron is 0.02) +2 to obtain a cold iron part 1;
4) inspecting the complete die 1 to ensure that no sundries exist in the complete die 1 and cleaning dirt;
5) preparing a cold iron piece 1, ensuring that no impurities exist outside the cold iron piece 1, cleaning dirt, drying the cold iron piece 1, and heating the cold iron piece 1 to 50-100 ℃;
6) fixing the cold iron piece 1 at a proper position in the complete mould 1, and casting molten iron into the complete mould 1;
7) and cooling and cleaning, and demolding and removing sand after the setting temperature of the casting is reduced to obtain the casting.
Step 1, size determination is carried out, the size of the casting is determined to be accurate to two digits after a decimal point, and the mantissa is rounded.
And 2, casting a mould, namely manufacturing the corresponding mould by using precoated sand according to the size of a casting, manufacturing the mould by two parts, and combining the two parts after the manufacturing is finished to obtain a complete mould 1, wherein the precoated sand for manufacturing the corresponding mould is prepared by adding a latent curing agent (urotropine) and a lubricant into thermoplastic phenolic resin through a certain coating process.
And 3, manufacturing the chiller, determining a hot spot part according to product requirements, determining the size of the hot spot part, and preparing the chiller, wherein the size of the hot spot part is equal to the diameter/1.5 of the chiller, the outer wall of the chiller is wrapped with precoated sand, the thickness of the inner wall of the precoated sand is equal to (the diameter of the chiller is 0.02) +2, so that a chiller part 1 is obtained, the diameter of the chiller is accurate to two digits after a decimal point, the mantissa is rounded off, and in a calculation formula of the thickness of the inner wall of the precoated sand, the unit of the diameter of the chiller is consistent with the unit after 2.
There is a bearing block workpiece with a chill diameter of 48cm and a precoated sand wall thickness equal to 2cm + (48cm x 0.02) and measuring 2.96 cm.
Example three: a novel casting production process for placing chills in precoated sand comprises the following steps:
1) determining the size of the casting;
2) casting a mould, namely manufacturing a corresponding mould by using precoated sand according to the size of a casting, manufacturing the mould by two parts, and closing the mould after the manufacturing is finished to obtain a complete mould 1;
3) manufacturing a cold iron, determining a hot spot part according to product requirements, determining the size of the hot spot part to obtain the cold iron, wherein the size of the hot spot part is equal to the diameter/1.5 of the cold iron, the outer wall of the cold iron is wrapped with precoated sand, and the thickness of the inner wall of the precoated sand is equal to (the diameter of the cold iron is 0.02) +2 to obtain a cold iron part 1;
4) inspecting the complete die 1 to ensure that no sundries exist in the complete die 1 and cleaning dirt;
5) preparing a cold iron piece 1, ensuring that no impurities exist outside the cold iron piece 1, cleaning dirt, drying the cold iron piece 1, and heating the cold iron piece 1 to 50-100 ℃;
6) fixing the cold iron piece 1 at a proper position in the complete mould 1, and casting molten iron into the complete mould 1;
7) and cooling and cleaning, and demolding and removing sand after the setting temperature of the casting is reduced to obtain the casting.
Step 1, size determination is carried out, the size of the casting is determined to be accurate to two digits after a decimal point, and the mantissa is rounded.
And 2, casting a mould, namely manufacturing the corresponding mould by using precoated sand according to the size of a casting, manufacturing the mould by two parts, and combining the two parts after the manufacturing is finished to obtain a complete mould 1, wherein the precoated sand for manufacturing the corresponding mould is prepared by adding a latent curing agent (urotropine) and a lubricant into thermoplastic phenolic resin through a certain coating process.
And 3, manufacturing the chiller, determining a hot spot part according to product requirements, determining the size of the hot spot part, and preparing the chiller, wherein the size of the hot spot part is equal to the diameter/1.5 of the chiller, the outer wall of the chiller is wrapped with precoated sand, the thickness of the inner wall of the precoated sand is equal to (the diameter of the chiller is 0.02) +2, so that a chiller part 1 is obtained, the diameter of the chiller is accurate to two digits after a decimal point, the mantissa is rounded off, and in a calculation formula of the thickness of the inner wall of the precoated sand, the unit of the diameter of the chiller is consistent with the unit after 2.
When the diameter of a cast chill is 50cm, the size of the hot spot is 50cm/1.5 and 33.33 cm.
The invention has the beneficial effects that: the novel casting production process comprises the steps of determining the size of a casting and casting a mold, manufacturing a corresponding mold by using precoated sand according to the size of the casting, manufacturing the mold in two parts, combining the two parts after manufacturing to obtain a complete mold 1, manufacturing a chiller, determining a hot spot part according to product requirements, determining the size of the hot spot part to obtain the chiller, wherein the size of the hot spot part is equal to the diameter of the chiller per 1.5, the outer wall of the chiller is wrapped with the precoated sand, the thickness of the inner wall of the precoated sand is equal to (diameter of the chiller) 0.02) +2, obtaining the chiller 1, checking the complete mold 1, ensuring that no sundries and dirt exist in the complete mold 1, preparing the chiller 1, ensuring that no sundries and dirt exist outside the chiller 1, cleaning the dirt, drying the chiller 1, heating the chiller 1 to 50-100 ℃, and fixing the chiller 1 at a proper position in the complete mold 1, the molten iron is cast into a complete mould 1, the molten iron is cooled and cleaned, demoulding and sand removal are carried out after the casting forming temperature is reduced, the coated sand is wrapped outside the chiller in the casting process, the final casting is convenient to demould after being formed, the chiller is easy to take out, the iron taking is convenient, the service life of the chiller is long, the cost is reduced, the looseness caused by incomplete internal pouring does not exist in the casting according to a chiller size calculation formula and a coated sand inner wall thickness calculation formula in the application, the effect is obvious, the casting defect does not exist in percentage, the coated sand material is not required, the common sand can be used, the method is suitable for any casting process, transverse and longitudinal heat absorption and heat dissipation are avoided, the trouble of a user is avoided, the use of the user is facilitated, the size of the casting is determined through the size determination, the casting mould is used according to the size of the casting, preparing a corresponding mould by using precoated sand, manufacturing the mould by two parts, combining the moulds after the manufacturing is finished to obtain a complete mould 1, manufacturing a chilling block, determining a hot spot part according to the product requirement, determining the size of the hot spot part, preparing the chilling block, wherein the size of the hot spot part is equal to the diameter of the chilling block/1.5, wrapping precoated sand on the outer wall of the chilling block, the thickness of the inner wall of the precoated sand is equal to (the diameter of the chilling block is 0.02) +2, obtaining the chilling block 1, checking the complete mould 1, ensuring that no sundries exist in the complete mould 1, cleaning the dirt, preparing the chilling block 1, ensuring that no sundries exist outside the chilling block 1, cleaning the dirt, drying the chilling block 1, heating the chilling block 1 to 50-100 ℃, fixing the chilling block 1 at a proper position in the complete mould 1, casting into the complete mould 1, cooling and cleaning, removing the sand after the casting is shaped and the casting is shaped, so as to obtain the precoated sand wrapped outside the chilling block in the casting process, the final casting has no wavy lines on the surface and no empty material defects, thereby reducing the defective rate and reducing the cost increase caused by defective products.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A novel casting production process for placing chills in precoated sand is characterized by comprising the following steps:
1) determining the size of the casting;
2) casting a mould, namely manufacturing a corresponding mould by using precoated sand according to the size of a casting, manufacturing the mould by two parts, and closing the mould after the manufacturing is finished to obtain a complete mould 1;
3) manufacturing a cold iron, determining a hot spot part according to product requirements, determining the size of the hot spot part to obtain the cold iron, wherein the size of the hot spot part is equal to the diameter/1.5 of the cold iron, the outer wall of the cold iron is wrapped with precoated sand, and the thickness of the inner wall of the precoated sand is equal to (the diameter of the cold iron is 0.02) +2 to obtain a cold iron part 1;
4) inspecting the complete die 1 to ensure that no sundries exist in the complete die 1 and cleaning dirt;
5) preparing a cold iron piece 1, ensuring that no impurities exist outside the cold iron piece 1, cleaning dirt, drying the cold iron piece 1, and heating the cold iron piece 1 to 50-100 ℃;
6) fixing the cold iron piece 1 at a proper position in the complete mould 1, and casting molten iron into the complete mould 1;
7) and cooling and cleaning, and demolding and removing sand after the setting temperature of the casting is reduced to obtain the casting.
2. The novel casting production process for placing chills in precoated sand according to claim 1, characterized in that: and (3) determining the size of the casting, wherein the size of the casting is determined to be accurate to two digits after the decimal point, and the mantissa is rounded.
3. The novel casting production process for placing chills in precoated sand according to claim 1, characterized in that: and 2, casting the mold, namely manufacturing the corresponding mold by using precoated sand according to the size of the casting, manufacturing the mold by two parts, and combining the two parts after the manufacturing is finished to obtain the complete mold 1, wherein the precoated sand for manufacturing the corresponding mold is prepared by adding a latent curing agent (urotropine) and a lubricant into thermoplastic phenolic resin through a certain coating process.
4. The novel casting production process for placing chills in precoated sand according to claim 1, characterized in that: and 3, manufacturing the chiller, determining a hot spot part according to product requirements, determining the size of the hot spot part, and manufacturing the chiller, wherein the size of the hot spot part is equal to the diameter of the chiller/1.5, the outer wall of the chiller is wrapped with precoated sand, the thickness of the inner wall of the precoated sand is equal to (the diameter of the chiller is 0.02) +2, so that a chiller part 1 is obtained, the diameter of the chiller is accurate to two digits after a decimal point, the mantissa is rounded off, and in a calculation formula of the thickness of the inner wall of the precoated sand, the unit of the diameter of the chiller is consistent with the unit after 2.
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| CN201910937112.2A CN110586893A (en) | 2019-09-29 | 2019-09-29 | Novel casting production process for placing chilling blocks in precoated sand |
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| CN201910937112.2A CN110586893A (en) | 2019-09-29 | 2019-09-29 | Novel casting production process for placing chilling blocks in precoated sand |
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Application publication date: 20191220 |