CN113102951A - One-step forming method of composite bottom aluminum pot - Google Patents

One-step forming method of composite bottom aluminum pot Download PDF

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Publication number
CN113102951A
CN113102951A CN202110418572.1A CN202110418572A CN113102951A CN 113102951 A CN113102951 A CN 113102951A CN 202110418572 A CN202110418572 A CN 202110418572A CN 113102951 A CN113102951 A CN 113102951A
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China
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aluminum
composite sheet
pot
composite
blank
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CN202110418572.1A
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胡飞鸣
吕海洋
胡振伟
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Nice Cooker Co ltd
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Nice Cooker Co ltd
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Priority to CN202110418572.1A priority Critical patent/CN113102951A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cookers (AREA)

Abstract

The invention discloses a one-step forming method of an aluminum pot with a composite bottom, and relates to the technical field of aluminum pots with composite bottoms. The invention comprises the following steps: step one, manufacturing a composite sheet at the bottom of a composite aluminum pot, punching a composite sheet raw material plate to obtain a composite sheet blank, cleaning the composite sheet blank by using a sodium hydroxide solution with the concentration of 2-3% and the pH value of 12-14 at the room temperature of 30-50 ℃, then washing the composite sheet blank by using water, neutralizing the composite sheet blank by using dilute nitric acid with the concentration of 1-2% and the pH value of 1-4, finally washing the composite sheet blank by using water, and drying the composite sheet blank by drying the composite sheet blank after being cleaned by using water, so as to compound the composite. According to the invention, the composite sheet is arranged on the female die of the pot die, and then the molten aluminum is poured into the pot die, so that the aluminum pot compounded with the composite sheet is conveniently poured at one time, the compounding speed is high, the method is simple and easy to operate, and the compounding stability is higher than that of a later-stage bonding compounding mode.

Description

One-step forming method of composite bottom aluminum pot
Technical Field
The invention belongs to the technical field of composite bottom aluminum pots, and particularly relates to a one-step forming method of a composite bottom aluminum pot.
Background
At present, aluminum pots in the cooker market cannot be suitable for induction cookers, and cannot be used on induction cookers because the aluminum pots do not have a magnetic conduction function. Some aluminum pots used on induction cookers all adopt a hot repeated beating process technology, a brazing process technology and a perforated repeated bottom process technology.
However, the existing composite bottom aluminum pot can be manufactured by adopting a hot redressing process technology, a brazing process technology, a perforated composite bottom process technology and other operations, and the manufacturing time is long, and the manufacturing efficiency is low.
Disclosure of Invention
The invention aims to provide a one-step forming method of a composite bottom aluminum pot, which solves the technical problems that the existing composite bottom aluminum pot can be manufactured by adopting a hot repeated beating process technology, a brazing process technology, a perforated repeated bottom process technology and other operations, the manufacturing time is long, and the manufacturing efficiency is low.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a one-step forming method of an aluminum pot with a composite bottom comprises the following steps:
firstly, manufacturing a composite sheet at the bottom of a composite aluminum pot, punching a composite sheet raw material plate to obtain a blank of the composite sheet, cleaning the blank with a sodium hydroxide solution with the concentration of 2-3% and the pH value of 12-14 at the room temperature of 30-50 ℃, then washing the blank with water, neutralizing the blank with dilute nitric acid with the concentration of 1-2% and the pH value of 1-4, finally washing the blank with water, and drying the blank after drying the blank for compounding on the aluminum pot;
step two, installing the composite sheet on a female die of a mold of a pot, fixing the male die in the female die, pouring molten aluminum into the mold of the pot, heating the molten aluminum to 660-750 ℃, continuing for 10-20 minutes, then pouring the molten aluminum into the mold, and coating the composite sheet in the mold by using the molten aluminum;
step three, waiting for the molding of the aluminum pot in the mold or cooling the mold, wherein the cooling treatment is also divided into a quenching section at 700-650 ℃, a slow cooling section at 650-400 ℃, and a second quenching section at 400-80 ℃ to form a pot with the bottom embedded with the composite sheet, and the pot is used for forming the aluminum pot embedded with the composite sheet;
step four, carrying out plane turning on the bottom of the blank of the aluminum pot body, taking out the fan to fix the fan on one side of the die, starting the fan, blowing the sheared rough edges to an intercepting net, collecting the rough edges into a waste material box, taking away a pipeline, and then continuously repeating the pouring process for cleaning the blank of the aluminum pot body;
step five, polishing the bottom of the aluminum pot for cleaning the convex part of the bottom of the aluminum pot, performing polishing treatment on the bottom of the aluminum pot, selecting stainless steel balls with the diameter of 1.2mm, performing pre-polishing on the inner surface of the pot body for 5-8s under the action of the centrifugal force of a motor with the power of 11KW, then selecting stainless steel balls with the diameter of 0.8mm, and performing deepening polishing on the inner surface of the pot body for 10-15s by using a motor with the power of 7.5 KW;
and sixthly, performing cold forging treatment on the polished aluminum pot by using an air hammer, spraying a layer of ceramic coating on the inner surface of the pot body, integrally forming a circle of wavy convex grains surrounding the side wall of the pot body on the outer surface of the side wall of the pot body, and spraying a layer of high-temperature-resistant paint on the outer surface of the side wall of the pot body.
Optionally, in the second step, a notch corresponding to the composite sheet is formed in the inner wall of the bottom end of the female die, the composite sheet is placed in the notch, and the second step further includes fixing the female die on the operating table and placing the composite sheet into the notch of the female die.
Optionally, the second step further includes heating the composite sheet to a temperature of 660 ℃ higher than the melting point of aluminum before the corresponding notch of the composite sheet is formed.
Optionally, the step two of pouring molten aluminum into the mold of the pot specifically comprises melting molten aluminum, pouring the molten aluminum into a feeding barrel of a die casting machine, then injecting a piston to push the molten aluminum into the die casting mold, and the step three of continuously shaping the molten aluminum for 10-15 minutes through a second rapid cooling section at 400-80 ℃, and then taking out the primary finished pot body from the mold.
Optionally, the composite sheet for manufacturing the bottom of the composite aluminum pot in the first step comprises stamping the composite sheet with a specified specification, and the cold forging treatment of the air hammer in the sixth step comprises primary forging, secondary forging and tertiary forging, wherein the primary forging is implemented by firstly hammering hammer marks with the interval of 5-15mm and the diameter of 5-15mm to form small pits on the surface of the aluminum pot, the secondary forging is implemented by continuously hammering the interval between the small pits to form the phenomenon of overlapping of hammer marks and hammer mark edges, the tertiary forging is implemented by flatly hammering small gaps left among the hammer marks by using a light hammer, so that the polished surface of the aluminum pot is fully covered with the hammer marks, the interval of the hammer marks of the primary forging is 10mm, and the diameter of the hammer marks is 10 mm.
Optionally, the first step further comprises the step of punching and positioning the stepped hole on the composite sheet at the bottom of the composite aluminum pot, and then polishing the surface of the composite sheet at the bottom of the composite aluminum pot.
Optionally, the thickness of the composite sheet is in a range from 0.5mm to 1.0mm, and in the sixth step, after the cold forging treatment is performed by an air hammer, the hard oxidation treatment is performed: the method comprises the steps of oxidizing 100g/L sulfuric acid at-1-10 ℃ for 25-35 minutes by using a pulse power supply with voltage of 20-80V and current density of 2-3.5A/dm 2 to form a hard oxidation film with the thickness of more than 25 microns, spraying a magnetic conduction coating and an antirust coating on the outer surface of a composite sheet after spraying materials on a pot body, and then spraying the antirust coating on the outer surface of the magnetic conduction coating at normal temperature to form the antirust coating, wherein the magnetic conduction coating is a ferromagnetic magnetic conduction coating.
Optionally, in step four, the flat bottom of the aluminum pot body blank is turned on the plane, the aluminum pot body blank needs to be fixed on the operating table before the aluminum pot body blank is turned, the bottom of the aluminum pot body blank faces the upper end, and sheared burrs are blown to the intercepting net by the fan.
The embodiment of the invention has the following beneficial effects:
according to the embodiment of the invention, the composite sheet is arranged on the female die of the pot die, and then the molten aluminum is poured into the pot die, so that the aluminum pot compounded with the composite sheet is conveniently poured at one time, the compounding speed is high, the method is simple and easy to operate, and the compounding stability is higher than that of a later-stage bonding compounding mode.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of an embodiment of the present 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
Referring to fig. 1, in the present embodiment, a method for forming an aluminum pot with a composite bottom in one step is provided, which includes: the method comprises the following steps:
firstly, manufacturing a composite sheet at the bottom of a composite aluminum pot, punching a composite sheet raw material plate to obtain a blank of the composite sheet, cleaning the blank with a sodium hydroxide solution with the concentration of 2-3% and the pH value of 12-14 at the room temperature of 30-50 ℃, then washing the blank with water, neutralizing the blank with dilute nitric acid with the concentration of 1-2% and the pH value of 1-4, finally washing the blank with water, drying the blank with air, and combining the cleaned composite sheet with aluminum water conveniently;
step two, installing the composite sheet on a female die of a pot, fixing the male die in the female die, pouring molten aluminum into the die of the pot, heating the molten aluminum to 660-750 ℃, continuing for 10-20 minutes, then pouring the molten aluminum into the die, and coating the composite sheet in the die by using the molten aluminum, so that the composite sheet can heat the molten aluminum around the composite sheet, the uniformity of the molten aluminum around the composite sheet is improved, and the coating effect is improved;
step three, waiting for the molding of the aluminum pot in the mold or cooling the mold, wherein the cooling treatment is also divided into a quenching section at 700-650 ℃, a slow cooling section at 650-400 ℃, and a second quenching section at 400-80 ℃ to form a pot with a composite sheet embedded at the bottom, so that the aluminum pot embedded with the composite sheet is formed, and the problem that the aluminum pot is brittle due to direct single quenching section below 80 ℃ is solved;
step four, carrying out plane turning on the flat bottom of the aluminum pot body blank, taking out the fan to fix the fan on one side of the die, starting the fan, blowing the sheared rough edges to an intercepting net, collecting the rough edges into a waste material box, taking away a pipeline, and then continuously repeating the pouring process for cleaning the aluminum pot body blank, so that the collection of the aluminum pot body blank waste materials is facilitated, and secondary utilization is facilitated;
step five, polishing the bottom of the aluminum pot for cleaning the convex part of the bottom of the aluminum pot, performing polishing treatment on the bottom of the aluminum pot, selecting stainless steel balls with the diameter of 1.2mm, performing pre-polishing on the inner surface of the pot body for 5-8s under the action of the centrifugal force of a motor with the power of 11KW, then selecting stainless steel balls with the diameter of 0.8mm, performing deepening polishing on the inner surface of the pot body for 10-15s by using a motor with the power of 7.5KW, and improving the polishing effect by adopting twice polishing;
step six, the aluminum pot after polishing adopts the air hammer to carry out the cold forging processing, is convenient for strengthen the density of aluminum pot, and then improves the intensity of aluminum pot, then has sprayed one deck ceramic coating to the internal surface of the pot body earlier, and the lateral wall surface integrated into one piece of the pot body has the wave protruding line that the round set up around the pot body lateral wall, and the lateral wall surface spraying of the pot body has one deck high temperature resistant paint layer, the high temperature resistance of reinforcing aluminum pot.
Install the compound piece on the die of the mould of pot and then pour aluminium water in to the mould of pot through the setting, and then be convenient for once pour the aluminium pot that has compound piece, and compound fast, the simple easy operation of method, the compound stability is higher with the compound mode stability of later stage adhesive relatively, with the isolated aluminium lamination of ceramic coating, greatly increased the safety in utilization of the pot body.
Still include in the step two of this embodiment and set up the notch that corresponds with compound piece at die bottom inner wall, compound piece is put in the notch, still includes in the step two to fix the die on the operation panel, and compound piece is put into the notch of die again, and the stability of compound piece in the die is strengthened, reduces compound piece and slides the probability that causes to pour the failure at the in-process of pouring.
The second step of the embodiment further comprises heating the composite sheet to a temperature greater than 660 ℃ of the melting point of aluminum before the notch corresponding to the composite sheet, so that the temperature difference of the aluminum water around the composite sheet is low, the composite sheet can be completely attached to the aluminum water, and the probability that the composite effect is poor due to the uneven temperature of the aluminum water around the composite sheet is reduced.
In the second step of this embodiment, the pouring of molten aluminum into the mold of the pan is specifically performed by melting molten aluminum, pouring the molten aluminum into a feeding barrel of a die casting machine, then injecting a piston to push the molten aluminum into the die casting mold, and the third step further includes continuously shaping the molten aluminum for 10-15 minutes through a second rapid cooling section at 400-80 ℃, and then taking out the primary product pan body from the mold, wherein the composite sheet at the bottom of the composite aluminum pan is manufactured in the first step and comprises stamping a composite sheet with a specified specification, and the cold forging treatment of the air hammer in the sixth step includes first forging, second forging and third forging, wherein the first forging is performed by a heavy hammer to stamp a hammer with a distance of 5-15mm and a diameter of 5-15mm, so that small pits are formed on the surface of the aluminum pan, the second forging is performed by a heavy hammer to stamp the distance between the small pits, thereby forming an overlapping phenomenon of the edge of the hammer stamp and the hammer stamp, and the third forging is performed by a light hammer to flatten the left small gap between the hammer stamp, guarantee that the aluminium pot surface of polishing is covered with the hammer print, the stability of die when being convenient for strengthen pouring reduces compound piece and slides at the in-process of pouring and causes the probability of pouring the failure.
The compound piece at the bottom of the compound aluminium pot of preparation in the step one of this embodiment includes the compound piece of the appointed specification of punching press, still includes in the step one to compound piece at the bottom of the aluminium pot of compound aluminium pot and carry out punching press location shoulder hole, then polishes compound piece surface at the bottom of the compound aluminium pot of compound, and the burr on the compound piece of being convenient for influences compound probability, through setting up punching press location shoulder hole at compound piece, is convenient for strengthen the stability of compound piece after compound.
Wherein, compound piece location shoulder hole's lower terminal surface diameter is greater than the up end diameter when placing in the notch, is convenient for strengthen compound piece's after compound stability.
The thickness of the composite sheet of the present example is in the range of 0.5mm to 1.0mm, and after the cold forging treatment by an air hammer is performed in step six, the hard oxidation treatment is performed: the method comprises the steps of oxidizing 100g/L sulfuric acid at-1-10 ℃ for 25-35 minutes by using a pulse power supply with voltage of 20-80V and current density of 2-3.5A/dm 2 to form a hard oxidation film with the thickness of more than 25 microns, spraying a magnetic conduction coating and an antirust coating on the outer surface of a composite sheet after spraying a material on a pot body, spraying the antirust coating on the outer surface of the magnetic conduction coating at normal temperature to form the antirust coating, wherein the magnetic conduction coating is a ferromagnetic magnetic conduction coating, and the magnetic conductivity of the composite pot and the probability of rusting the second composite pot are enhanced.
Carry out the plane turning to aluminium pot body blank pan bottom in the step four of this embodiment, need fix aluminium pot body blank on the operation panel before turning aluminium pot body blank, make aluminium pot body blank bottom towards the upper end, make the fan blow the deckle edge of shearing to the interception net, be convenient for cut the part of compound piece in the notch, just leak the part at the bottom of the aluminium pot after pouring promptly.
The above embodiments may be combined with each other.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Claims (8)

1. A one-step forming method of an aluminum pot with a composite bottom is characterized by comprising the following steps: the method comprises the following steps:
firstly, manufacturing a composite sheet at the bottom of a composite aluminum pot, punching a composite sheet raw material plate to obtain a blank of the composite sheet, cleaning the blank with a sodium hydroxide solution with the concentration of 2-3% and the pH value of 12-14 at the room temperature of 30-50 ℃, then washing the blank with water, neutralizing the blank with dilute nitric acid with the concentration of 1-2% and the pH value of 1-4, finally washing the blank with water, and drying the blank after drying the blank for compounding on the aluminum pot;
step two, installing the composite sheet on a female die of a mold of a pot, fixing the male die in the female die, pouring molten aluminum into the mold of the pot, heating the molten aluminum to 660-750 ℃, continuing for 10-20 minutes, then pouring the molten aluminum into the mold, and coating the composite sheet in the mold by using the molten aluminum;
step three, waiting for the molding of the aluminum pot in the mold or cooling the mold, wherein the cooling treatment is also divided into a quenching section at 700-650 ℃, a slow cooling section at 650-400 ℃, and a second quenching section at 400-80 ℃ to form a pot with the bottom embedded with the composite sheet, and the pot is used for forming the aluminum pot embedded with the composite sheet;
step four, carrying out plane turning on the bottom of the blank of the aluminum pot body, taking out the fan to fix the fan on one side of the die, starting the fan, blowing the sheared rough edges to an intercepting net, collecting the rough edges into a waste material box, taking away a pipeline, and then continuously repeating the pouring process for cleaning the blank of the aluminum pot body;
step five, polishing the bottom of the aluminum pot for cleaning the convex part of the bottom of the aluminum pot, performing polishing treatment on the bottom of the aluminum pot, selecting stainless steel balls with the diameter of 1.2mm, performing pre-polishing on the inner surface of the pot body for 5-8s under the action of the centrifugal force of a motor with the power of 11KW, then selecting stainless steel balls with the diameter of 0.8mm, and performing deepening polishing on the inner surface of the pot body for 10-15s by using a motor with the power of 7.5 KW;
and sixthly, performing cold forging treatment on the polished aluminum pot by using an air hammer, spraying a layer of ceramic coating on the inner surface of the pot body, integrally forming a circle of wavy convex grains surrounding the side wall of the pot body on the outer surface of the side wall of the pot body, and spraying a layer of high-temperature-resistant paint on the outer surface of the side wall of the pot body.
2. The one-step forming method of the aluminum pot with the composite bottom as claimed in claim 1, wherein the second step further comprises forming a notch corresponding to the composite sheet on the inner wall of the bottom end of the female die, and placing the composite sheet in the notch, and the second step further comprises fixing the female die on the operating platform, and placing the composite sheet in the notch of the female die.
3. The method for forming the aluminum pot with the composite bottom in one step as claimed in claim 2, wherein the second step further comprises heating the composite sheet to a temperature of 660 ℃ higher than the melting point of aluminum before the corresponding notch of the composite sheet is formed.
4. The one-step forming method of the aluminum pot with the composite bottom as claimed in claim 1, wherein the step two of pouring molten aluminum into the mold of the pot comprises the steps of melting the molten aluminum, pouring the molten aluminum into a feeding cylinder of a die casting machine, and then injecting the molten aluminum into the die casting mold by a piston.
5. The method of claim 4, wherein the step one, of forming the composite sheet on the bottom of the aluminum pan comprises stamping the composite sheet with a predetermined size, the step six, the step of cold forging with the air hammer comprises a first forging, a second forging and a third forging, the first forging comprises a step of hammering the composite sheet into a hammer print with a diameter of 5-15mm and a distance of 5-15mm, so as to form small pits on the surface of the aluminum pan, the second forging comprises a step of continuously hammering the small pits to form an overlapping phenomenon of the hammer print and the hammer print, the third forging comprises a step of flattening the small gaps left between the hammer prints with a light hammer to ensure that the polished surface of the aluminum pan is covered with the hammer print, the first forging step has a distance of 10mm, and the hammer print has a diameter of 10 mm.
6. The one-step forming method of the composite bottom aluminum pot as claimed in claim 3, wherein the first step further comprises punching positioning stepped holes on the composite sheet of the composite aluminum pot bottom, and then polishing the surface of the composite sheet of the composite aluminum pot bottom.
7. The one-step forming method of the aluminum pot with the composite bottom as claimed in claim 4, wherein the thickness of the composite sheet is in the range of 0.5mm to 1.0mm, and the step six comprises performing hard oxidation treatment after performing cold forging treatment by using an air hammer: oxidizing with 100g/L sulfuric acid at-1-10 deg.C for 25-35 min by using pulse power supply with voltage of 20-80V and current density of 2-3.5A/dm 2 to form hard oxide film of 25um or more.
8. The method for forming an aluminum pot with a composite bottom as claimed in claim 1, wherein the aluminum pot body blank is turned on a flat bottom in the fourth step, the aluminum pot body blank is fixed on an operation table before being turned, the bottom of the aluminum pot body blank faces the upper end, and the fan blows the cut raw edges to the intercepting net.
CN202110418572.1A 2021-04-19 2021-04-19 One-step forming method of composite bottom aluminum pot Pending CN113102951A (en)

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CN109757971A (en) * 2019-03-19 2019-05-17 福建鼎厨王厨具有限公司 A kind of combined type flat bottom aluminium pot and its preparation process
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07136058A (en) * 1993-11-19 1995-05-30 Toshiba Corp Cooking device
CN101096050A (en) * 2006-06-30 2008-01-02 徐红卫 Method for manufacturing bottom-covered pressure casting aluminum pot and special production mould therefor
CN101554287A (en) * 2008-05-27 2009-10-14 厦门安联企业有限公司 Process technology of boiler for induction cooker
CN101327100A (en) * 2008-06-24 2008-12-24 施新委 Aluminum pot composite pan bottom and method for producing the same
CN201510154U (en) * 2009-09-29 2010-06-23 陆意祥 Composite boiler bottom of aluminum boiler
CN103783999A (en) * 2014-01-16 2014-05-14 武义瑞普厨具有限公司 Novel composite cooker and manufacturing method thereof
CN105290360A (en) * 2014-06-30 2016-02-03 浙江永达工贸有限公司 Production process for composite-bottom aluminum pot
CN104490248A (en) * 2014-10-31 2015-04-08 浙江三禾厨具有限公司 Non-stick pan machining process
CN105642874A (en) * 2014-12-04 2016-06-08 重庆旭新悦数控机械有限公司 Pouring technology for bearing alloy
CN204909112U (en) * 2015-09-02 2015-12-30 宁波安提西炊具有限公司 Bottom of a boiler structure of magnetic conduction pot
CN106141588A (en) * 2016-07-29 2016-11-23 周莹 A kind of wrought iron pan manufacture craft
CN106820939A (en) * 2017-02-20 2017-06-13 浙江康家宝炊具有限公司 The production technology of composite base pan
CN109757971A (en) * 2019-03-19 2019-05-17 福建鼎厨王厨具有限公司 A kind of combined type flat bottom aluminium pot and its preparation process
CN110403478A (en) * 2019-08-29 2019-11-05 武义华康电器有限公司 A kind of non-stick pan pot body and its preparation process

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