WO2021147164A1 - 一种多层复合锅具及其制造方法 - Google Patents

一种多层复合锅具及其制造方法 Download PDF

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WO2021147164A1
WO2021147164A1 PCT/CN2020/080561 CN2020080561W WO2021147164A1 WO 2021147164 A1 WO2021147164 A1 WO 2021147164A1 CN 2020080561 W CN2020080561 W CN 2020080561W WO 2021147164 A1 WO2021147164 A1 WO 2021147164A1
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layer
pot
cookware
heat
plate
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PCT/CN2020/080561
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English (en)
French (fr)
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董雪露
涂序才
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浙江尚厨家居科技股份有限公司
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
    • B32B15/015—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium the said other metal being copper or nickel or an alloy thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/08—Interconnection of layers by mechanical means

Definitions

  • the invention relates to the technical field of kitchenware, in particular to a multilayer composite pot and a manufacturing method thereof.
  • the stainless steel pots and pans used by people today are generally made of two materials, one is directly stretched or formed by spinning thick stainless steel plates, and the other is directly stretched and formed from steel-aluminum-steel three-layer steel or five-layer steel. .
  • the pot manufactured by the first method is generally compounded with a thick bottom at the bottom.
  • the compound bottom is mainly used to improve the heat conduction at the bottom of the pot and increase the strength of the bottom of the pot.
  • this type of pot has two problems. First, the pot is heavier, and all the materials need to be made of food-grade stainless steel or titanium, and the material cost is higher; second, the outsole of this kind of pot is difficult to press because the material is heated by a large tonnage punch.
  • Chinese patent CN202457811 discloses a double-layer composite compound bottom pot.
  • the pot body includes a pot body base and a pot body compound bottom.
  • the pot body compound bottom includes a heat-conducting interlayer and a stainless steel compound bottom sheet.
  • the pot body is a double-layer metal integrated composite molding.
  • the base body wherein the inner layer is a stainless steel layer, and the outer layer is an aluminum alloy layer.
  • the double-layer composite compound bottom pot has the advantages of fast heat transfer, uniform heating, health, and can be directly heated by an induction cooker. However, in actual use, consumers found that due to the insufficient expansion of the thermally conductive interlayer and small deformation, the combination of the pot body and the bottom of the pot is not tight enough. The pot body of this design is easy to be removed from the pot body after a long time use. Falling off, the service life is shorter.
  • the present invention provides a multi-layer composite pot with good pot stability and long service life and a manufacturing method thereof.
  • Multi-layer composite cookware including the cookware body, the cookware body includes the cookware outer layer and the cookware inner layer, the cookware outer layer is made of magnetically permeable stainless steel material or magnetic iron material, and the cookware inner layer is made of food-grade stainless steel Material or food-grade titanium material or food-grade copper material or food-grade iron material.
  • the cookware body also includes a heat-conducting layer. The heat-conducting layer is arranged between the outer layer of the cookware and the inner layer of the cookware.
  • the heat-conducting layer is made of aluminum or copper It is made of material, the heat-conducting layer is arranged at the bottom of the pot body, the outer layer of the pot comprises an outer side wall and a base arranged at the lower end of the outer side wall, and the heat-conducting layer is arranged in the base.
  • the outer layer of the pot is made of magnetic material, so that the pot can be used on the induction cooker, meeting the performance requirements of the pot suitable for the induction cooker.
  • the middle layer at the bottom of the pot is made of a metal material with good heat conduction, usually pure aluminum or copper.
  • Such as metal materials improve the performance of even heat conduction at the bottom of the pot, ensure that the bottom temperature of the pot is uniform during use, so that no food paste bottom is produced, and the pot bottom has high strength, so as not to cause defects such as deformation of the pot during the heating process, and will conduct heat.
  • the layer is arranged at the bottom of the pot body, which saves the manufacturing cost of the pot body and ensures the heating performance of the pot body.
  • the inner layer of the pot is made of food-grade metal materials to improve the health of the food in the pot.
  • the heat-conducting layer, the outer layer of the pot, and the inner layer of the pot are arranged concentrically. Ensure that the heat-conducting layer can evenly introduce heat into the inner layer of the pot.
  • the bottom of the outer layer of the cookware is processed with a downwardly recessed accommodating groove, and the heat-conducting layer is installed in the accommodating groove.
  • the accommodating groove for installing the heat conducting layer By setting the accommodating groove for installing the heat conducting layer, the stability and installation strength of the heat conducting layer installation are improved.
  • the lower end surface of the heat-conducting layer is provided with protrusions extending downward, and the bottom of the accommodating groove is provided with a plurality of protrusion holes adapted to the protrusions, and the protrusions are embedded in the protrusion holes.
  • the bumps are embedded in the bump holes to fix the heat-conducting layer on the outer layer of the pot, ensuring the metallurgical bonding and mechanical riveting connection of the heat-conducting layer and the outer layer of the pot, and improving the connection strength between the heat-conducting layer and the outer layer of the pot .
  • a method for manufacturing a multilayer composite cookware includes the above-mentioned multilayer composite cookware, and further includes the following manufacturing steps: Step 1, taking a food grade stainless steel material or a food grade titanium material or a food grade copper material or a food grade The inner plate made of iron material is used to make the inner layer of the cookware, and the lower end surface of the inner plate is roughened by sandblasting or emery cloth; step 2, using magnetically permeable stainless steel material or permeable iron material The finished outer plate used to make the outer layer of the cookware is roughened on the upper end surface of the outer plate; step 3, the position on the outer plate used to make the bottom of the cookware body is punched, Process the bump holes; step 4, take the heat-conducting layer made of aluminum material or red copper material, and superimpose and fix the inner plate, the heat-conducting layer, and the outer plate from top to bottom. It is convenient to process the composite inner sheet, heat conduction layer and outer sheet.
  • step 5 heating the fixed inner sheet, heat conducting layer, and outer sheet to 400-500°C, putting it into a hydraulic press or punching die, and punching the bottom of the pot body.
  • the lower end surface of the heat-conducting layer forms a bump under the pressure of a hydraulic press or a punch and is embedded in the bump hole of the outer layer of the pot. It is ensured that the heat-conducting layer and the outer layer of the pot are combined by metallurgical bonding and mechanical riveting, and the connection strength between the heat-conducting layer and the outer layer of the pot is improved.
  • the method further includes step 6, which is to stretch the inner sheet, the heat conductive layer, and the outer sheet after the stamping and compounding in step 5 into the shape of the pot body by a hydraulic press or spin into the shape of the pot body by a spinning machine.
  • step 6 is to stretch the inner sheet, the heat conductive layer, and the outer sheet after the stamping and compounding in step 5 into the shape of the pot body by a hydraulic press or spin into the shape of the pot body by a spinning machine.
  • the inner plate, the heat conducting layer, and the outer plate are arranged concentrically.
  • the heat-conducting layer is located at the bottom of the pot to improve processing efficiency.
  • the thickness of the inner sheet after spinning is 0.05 to 0.5 mm, and the thickness of the outer sheet after spinning is 0.4 to 1 mm.
  • step 4 the end surface of the inner plate after the roughening treatment faces the heat-conducting layer
  • the end surface of the outer plate after the roughening treatment faces the heat-conducting layer
  • the heat-conducting layer is located between the inner plate and the outer plate.
  • spot welding is performed to fix the center positions of the inner sheet, the heat conduction layer, and the outer sheet.
  • the present invention has significant technical effects: the outer layer of the pot and the inner layer of the pot are made of different metal materials, which reduces the production cost of the pot body, and the inner layer of the pot is made of food-grade metal materials It is made to improve the safety of cooking food and ensure the health of the food.
  • the heat conduction layer is metallurgically combined with the inner layer of the pot, and the heat conduction layer is metallurgically combined with the outer layer of the pot and mechanical riveting combination, which improves the thermal conductivity and the bottom of the pot body. Stability of the bottom of the pot.
  • Figure 1 is a schematic diagram of the structure of the pressure cooker processed by the present invention.
  • Fig. 2 is a partial enlarged schematic diagram of the M part in Fig. 1.
  • Figure 3 is a schematic diagram of the outer layer of the pot.
  • FIG. 4 is a partial enlarged schematic diagram of the structure of part N in FIG. 3.
  • Figure 5 is a bottom view of the structure of the present invention.
  • Figure 6 is a schematic diagram of the structure of the soup pot processed by the present invention.
  • the multi-layer composite pot as shown in Figures 1 to 4, includes a pot body 1.
  • the upper edge of the pot body 1 is provided with an outwardly turned pot rim 8, and the pot rim 8 and the pot body 1 are an integrated structure ,
  • the pot body 1 includes a pot outer layer 2 and a pot inner layer 3.
  • the pot outer layer 2 is made of magnetically permeable stainless steel or magnetic iron material
  • the pot inner layer 3 is made of food-grade stainless steel or food-grade titanium Material or food-grade copper material or food-grade iron material.
  • the cookware body 1 also includes a thermally conductive layer 4.
  • the thermally conductive layer 4 is arranged between the outer layer 2 of the cookware and the inner layer 3 of the cooker.
  • the thermally conductive layer 4 is made of aluminum material or Made of red copper material, the heat conduction layer 4 is arranged at the bottom of the pot body 1, the heat conduction layer 4, the pot outer layer 2, and the pot inner layer 3 are arranged concentrically, and the bottom of the pot outer layer 2 is processed with a downwardly recessed accommodation Groove 5, the accommodating groove 5 is formed by the bottom plate 23 and the connecting section 24, the heat conductive layer 4 is installed in the accommodating groove 5, the lower end of the heat conductive layer 4 is provided with a downwardly extending protrusion 6, and the bottom of the accommodating groove 5
  • a plurality of bump holes 7 adapted to the bumps 6 are opened, that is, the bump holes 7 are opened on the bottom plate 23, the bumps 6 are embedded in the bump holes 7, and the bump holes 7 are uniformly located at the bottom of the pot. Through holes or flip holes set by the cloth.
  • the outer layer 2 of the cookware includes an outer side wall 21 and a base 22 provided at the lower end of the outer side wall 21.
  • the base 22 includes a bottom plate 23 and a connecting section 24 arranged obliquely on both sides of the bottom plate 23.
  • One end of the connecting section 24 is connected to the bottom plate 23.
  • the other end of the connecting section 24 is connected with the outer side wall 21.
  • the connecting section 24 is gradually inclined from the end of the bottom plate 23 to the outer side wall 21 from the bottom right to the top.
  • the outer side wall 21, the bottom plate 23, The connecting section 24 is a one-piece structure.
  • the convex hole 7 is a plurality of strip holes uniformly arranged around the bottom center of the pot body 1. For the arc.
  • a method for manufacturing a multilayer composite cookware includes the multilayer composite cookware described above, and further includes the following manufacturing steps: Step 1, taking food-grade stainless steel or food-grade titanium Material or food-grade copper material or food-grade iron material is used to make the inner plate of the inner layer 3 of the cookware, and the lower end surface of the inner plate is roughened by sandblasting or emery cloth; step 2, take The outer layer plate made of magnetically permeable stainless steel material or magnetic permeable iron material is used to make the outer layer 2 of the cookware, and the upper end surface of the outer layer plate is roughened; step 3, the outer layer plate is used to make the pot The position of the bottom of the pot with the body 1 is punched to process the bump holes; step 4, take the thermal conductive layer 4 made of aluminum or copper material, and place the inner sheet, the heat conductive layer 4, and the outer sheet from top to The end surface of the inner sheet after the roughening process faces the heat-conducting layer 4, the end face of the outer sheet after
  • step 5 heating the fixed inner sheet, heat conducting layer 4, and outer sheet to 400-500°C, putting them into a hydraulic press or punching die and punching them together, and punching the bottom of the pot body 1 into
  • the lower end surface of the heat-conducting layer 4 forms a bump 6 under the pressure of a hydraulic press or a punch press and is inserted into the bump hole of the outer layer 2 of the cookware.
  • step 6 which is to stretch the inner sheet, the thermal conductive layer 4, and the outer sheet after the stamping and composite in step 5 into the shape of the pot body 1 by a hydraulic press or spin into the shape of the pot body 1 by a spinning machine
  • the pot body 1 is a pressure cooker or a wok
  • the thickness of the inner plate after spinning is 0.05 to 0.5 mm
  • the thickness of the outer plate after spinning is 0.4 to 1 mm.

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  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
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Abstract

一种多层复合锅及其制造方法，包括锅具本体（1），锅具本体（1）包括锅具外层（2）和锅具内层（3），锅具外层（2）由导磁性不锈钢材料或导磁性铁材料制成，锅具内层（3）由食品级不锈钢材料或食品级钛材料或食品级铜材料或食品级铁材料制成，锅具本体（1）还包括导热层（4），导热层（4）设在锅具外层（2）和锅具内层（3）之间，导热层（4）由铝材料或紫铜材料制成，导热层（4）设在锅具本体（1）的底部。锅具外层和锅具内层使用不同的材料制成，降低了生产成本，锅具内层通过食品级金属材料制成，提高了烹饪食物的安全性，导热层与锅具外层冶金结合，提高了锅具本体底部的导热性能。

Description

一种多层复合锅具及其制造方法 技术领域
本发明涉及厨具技术领域，尤其涉及一种多层复合锅具及其制造方法。
背景技术
当下人们使用的不锈钢锅具一般分为两种材料制成，一是直接采用厚的不锈钢板拉伸或旋压成型，二是直接采用钢铝钢三层钢或五层钢材料直接拉伸成型。第一种方法制造的锅一般在其底部再复合一个厚的锅底，其复合的锅底的作用主要用于改善锅底部的导热与增加锅底部的强度，但此种锅具存在两个问题，一是锅具较重，加之全部材料需要用食品级不锈钢或钛材料制作，材料成本较高；二是此种锅具的外底因为是采用大吨位冲床将材料加热后冲压上去的，难于做到中间层导热金属与锅内层材料的冶金结合，故产品在使用过程中容易产生脱底，给用户带来诸多的不便。第二种方法制造的锅因为锅壁也是三层材料，这是完全没有必要的，故此类方法生产的锅具其产品重材料浪费严重。如中国专利CN202457811公开了一种双层复合复底锅，其锅体包括锅体基体和锅体复底，锅体复底包括导热夹层和不锈钢复底片，锅体基体为双层金属一体复合成型的基体，其中内层为不锈钢层，外层为铝合金层。该双层复合复底锅具有传热速度快、受热均匀、健康、能用电磁炉直接加热的优点。但是实际使用中消费者发现，由于导热夹层未充分延展，变形较小，锅体基体和锅体复底的结合不够紧密牢固，此设计的锅体复底长时间使用后容易从锅体基体上脱落，使用寿命较短。
发明内容
本发明针对现有技术中锅具稳定性差、使用寿命较短的缺点，提供了一种 锅具稳定性好、使用寿命长的一种多层复合锅具及其制造方法。
为了解决上述技术问题，本发明通过下述技术方案得以解决：
多层复合锅具，包括锅具本体，锅具本体包括锅具外层和锅具内层，锅具外层由导磁性不锈钢材料或导磁性铁材料制成，锅具内层由食品级不锈钢材料或食品级钛材料或食品级铜材料或食品级铁材料制成，锅具本体还包括导热层，导热层设在锅具外层和锅具内层之间，导热层由铝材料或紫铜材料制成，导热层设在锅具本体的底部，锅具外层包括外层侧壁和设在外层侧壁下端的底座，导热层设在底座内。锅具外层由导磁性材料制成，使锅具能在电磁炉上使用，满足锅具适用于电磁炉的性能要求，锅底部的中间层采用导热好的金属材料来制作，通常采用纯铝或紫铜等金属材料，提高锅底导热均匀的性能，确保锅具在使用中底部温度均匀从而不产生食物糊底而且锅底强度高，不至于使锅具在加热过程中产生变形等缺陷，且将导热层设在锅具本体的底部，节省了锅具本体的制造成本，保证了锅具本体的加热性能，锅具内层采用食品级金属材料制成，提高锅内食物的健康。
作为优选，导热层、锅具外层、锅具内层同心设置。保证导热层能够均匀将热量导入锅具内层。
作为优选，锅具外层的底部加工有向下凹陷的容置槽，导热层安装在容置槽内。通过设置容置槽用于安装导热层，提高导热层安装的稳定性和安装强度。
作为优选，导热层的下端面设有向下延伸的凸块，容置槽的底部开设有多个与凸块相适配的凸块孔，凸块嵌置在凸块孔内。凸块嵌置在凸块孔内将导热层固定在锅具外层上，保证了导热层与锅具外层的冶金结合和机械铆合连接，提高了导热层和锅具外层的连接强度。
一种多层复合锅具的制造方法，包括以上所述的多层复合锅具，还包括以 下制造步骤：步骤1，取由食品级不锈钢材料或食品级钛材料或食品级铜材料或食品级铁材料制成的用于制作锅具内层的内层板材，采用喷砂或者砂布对内层板材的下端面进行毛面粗化处理；步骤2，取由导磁性不锈钢材料或导磁性铁材料制成的用于制作锅具外层的外层板材，对外层板材的上端面进行毛面粗化处理；步骤3，对外层板材上用于制作锅具本体锅底的位置进行冲孔加工，加工出凸块孔；步骤4，取由铝材料或紫铜材料制成的导热层，将内层板材、导热层、外层板材由上至下依次叠加并固定。方便对复合的内层板材、导热层、外层板材进行加工。
作为优选，还包括步骤5，对固定后的内层板材、导热层、外层板材进行加热并加热至400～500℃，放入液压机或冲床的模具冲压为一体，将锅具本体的底部冲压为台阶状，导热层的下端面在液压机或冲床压力下形成凸块并嵌入锅具外层的凸块孔。保证导热层与锅具外层以冶金结合加机械铆接结合，提高导热层与锅具外层的连接强度。
作为优选，还包括步骤6，将步骤5中冲压复合后的内层板材、导热层、外层板材通过液压机拉伸成锅具本体的形状或者通过旋压机旋压成锅具本体的形状。简化了加工的工艺，提高了加工效率。
作为优选，内层板材、导热层、外层板材同心设置。方便加工成型后，导热层位于锅具底部，提高加工效率。
作为优选，步骤6中，旋压后内层板材的厚度在0.05～0.5mm，旋压后外层板材的厚度在0.4～1mm。
作为优选，步骤4中，内层板材经过毛面粗化处理的端面朝向导热层，外层板材经过毛面粗化处理的端面朝向导热层，导热层位于内层板材和外层板材之间的中部，对内层板材、导热层、外层板材的中心位置进行点焊固定。
本发明由于采用了以上技术方案，具有显著的技术效果：锅具外层和锅具内层使用不同的金属材料制成，降低了锅具本体的生产成本，锅具内层通过食品级金属材料制成，提高了烹饪食物的安全性以及保证了食物健康，导热层与锅具内层冶金结合，导热层与锅具外层冶金结合加机械铆接结合，提高了锅具本体底部的导热性能与锅底稳定性。
附图说明
图1是本发明加工为压力锅结构示意图。
图2是图1中M部的局部放大结构示意图。
图3是锅具外层的结构示意图。
图4是图3中N部的局部放大结构示意图。
图5是本发明的仰视结构示意图。
图6是本发明加工为汤锅的结构示意图。
附图中各数字标号所指代的部位名称如下：1—锅具本体、2—锅具外层、3—锅具内层、4—导热层、5—容置槽、6—凸块、7—凸块孔、8—锅边、21—外层侧壁、22—底座、23—底板、24—连接段。
具体实施方式
下面结合附图与实施例对本发明作进一步详细描述。
实施例1
多层复合锅具，如图1至图4所示，包括锅具本体1，锅具本体1的上端边缘设有向外翻转的锅边8，锅边8与锅具本体1为一体式结构，锅具本体1包括锅具外层2和锅具内层3，锅具外层2由导磁性不锈钢材料或导磁性铁材料制成，锅具内层3由食品级不锈钢材料或食品级钛材料或食品级铜材料或食品级铁材料制成，锅具本体1还包括导热层4，导热层4设在锅具外层2和锅具内层3之 间，导热层4由铝材料或紫铜材料制成，导热层4设在锅具本体1的底部，导热层4、锅具外层2、锅具内层3同心设置，锅具外层2的底部加工有向下凹陷的容置槽5，容置槽5由底板23和连接段24合围形成，导热层4安装在容置槽5内，导热层4的下端面设有向下延伸的凸块6，容置槽5的底部开设有多个与凸块6相适配的凸块孔7，即凸块孔7开设在底板23上，凸块6嵌置在凸块孔7内，凸块孔7为在锅具底部均布设置的通孔或翻孔。
锅具外层2包括外层侧壁21和设在外层侧壁21下端的底座22，底座22包括底板23和设在底板23两侧倾斜设置的连接段24，连接段24的一端与底板23的端部连接，连接段24的另一端与外层侧壁21连接，连接段24由底板23端部向外层侧壁21方向右下至上逐渐倾斜设置，外层侧壁21、底板23、连接段24为一体式结构。
实施例2
多层复合锅具，如图1至图4所示，在实施例1的基础上，凸块孔7为多个绕着锅具本体1底部中心环形均布设置的条形孔，条形孔为弧形。
实施例3
一种多层复合锅具的制造方法，如图1至图5所示，包括以上所述的多层复合锅具，还包括以下制造步骤：步骤1，取由食品级不锈钢材料或食品级钛材料或食品级铜材料或食品级铁材料制成的用于制作锅具内层3的内层板材，采用喷砂或者砂布对内层板材的下端面进行毛面粗化处理；步骤2，取由导磁性不锈钢材料或导磁性铁材料制成的用于制作锅具外层2的外层板材，对外层板材的上端面进行毛面粗化处理；步骤3，对外层板材上用于制作锅具本体1锅底的位置进行冲孔加工，加工出凸块孔；步骤4，取由铝材料或紫铜材料制成的导热层4，将内层板材、导热层4、外层板材由上至下依次叠加并固定，内层板材经 过毛面粗化处理的端面朝向导热层4，外层板材经过毛面粗化处理的端面朝向导热层4，导热层4位于内层板材和外层板材之间的中部，对内层板材、导热层4、外层板材的中心位置进行点焊固定，内层板材、导热层4、外层板材同心设置。
还包括步骤5，对固定后的内层板材、导热层4、外层板材进行加热并加热至400～500℃，放入液压机或冲床的模具冲压为一体，将锅具本体1的底部冲压为台阶状，导热层4的下端面在液压机或冲床压力下形成凸块6并嵌入锅具外层2的凸块孔。
还包括步骤6，将步骤5中冲压复合后的内层板材、导热层4、外层板材通过液压机拉伸成锅具本体1的形状或者通过旋压机旋压成锅具本体1的形状，锅具本体1为压力锅或为炒锅，旋压后内层板材的厚度在0.05～0.5mm，旋压后外层板材的厚度在0.4～1mm。
总之，以上所述仅为本发明的较佳实施例，凡依本发明申请专利范围所作的均等变化与修饰，皆应属本发明专利的涵盖范围。

Claims (10)

  1. 多层复合锅具，其特征在于：包括锅具本体(1)，锅具本体(1)包括锅具外层(2)和锅具内层(3)，锅具外层(2)由导磁性不锈钢材料或导磁性铁材料制成，锅具内层(3)由食品级不锈钢材料或食品级钛材料或食品级铜材料或食品级铁材料制成，锅具本体(1)还包括导热层(4)，导热层(4)设在锅具外层(2)和锅具内层(3)之间，导热层(4)由铝材料或紫铜材料制成，导热层(4)设在锅具本体(1)的底部，锅具外层(2)包括外层侧壁(21)和设在外层侧壁(21)下端的底座(22)，导热层(4)设在底座(22)内。
  2. 根据权利要求1所述的多层复合锅具，其特征在于：导热层(4)、锅具外层(2)、锅具内层(3)同心设置。
  3. 根据权利要求1所述的多层复合锅具，其特征在于：锅具外层(2)的底部加工有向下凹陷的容置槽(5)，导热层(4)安装在容置槽(5)内。
  4. 根据权利要求3所述的多层复合锅具，其特征在于：导热层(4)的下端面设有向下延伸的凸块(6)，容置槽(5)的底部开设有多个与凸块(6)相适配的凸块孔(7)，凸块(6)嵌置在凸块孔(7)内。
  5. 一种多层复合锅具的制造方法，其特征在于：包括权利要求1至4任一项所述的多层复合锅具，还包括以下制造步骤：步骤1，取由食品级不锈钢材料或食品级钛材料或食品级铜材料或食品级铁材料制成的用于制作锅具内层(3)的内层板材，采用喷砂或者砂布对内层板材的下端面进行毛面粗化处理；步骤2，取由导磁性不锈钢材料或导磁性铁材料制成的用于制作锅具外层(2)的外层板材，对外层板材的上端面进行毛面粗化处理；步骤3，对外层板材上用于制作锅具本体(1)锅底的位置进行冲孔加工，加工出凸块孔；步骤4，取由铝材料或紫铜材料制成的导热层(4)，将内层板材、导热层(4)、外层板材由上至下依次叠加并固定。
  6. 根据权利要求5所述的一种多层复合锅具的制造方法，其特征在于：还包括步骤5，对固定后的内层板材、导热层(4)、外层板材进行加热并加热至400～500℃，放入液压机或冲床的模具冲压为一体，将锅具本体(1)的底部冲压为台阶状，导热层(4)的下端面在液压机或冲床压力下形成凸块(6)并嵌入锅具外层(2)的凸块孔。
  7. 根据权利要求6所述的一种多层复合锅具的制造方法，其特征在于：还包括步骤6，将步骤5中冲压复合后的内层板材、导热层(4)、外层板材通过液压机拉伸成锅具本体(1)的形状或者通过旋压机旋压成锅具本体(1)的形状。
  8. 根据权利要求5所述的一种多层复合锅具的制造方法，其特征在于：内层板材、导热层(4)、外层板材同心设置。
  9. 根据权利要求7所述的一种多层复合锅具的制造方法，其特征在于：步骤6中，内层板材的厚度在0.05～0.5mm，外层板材的厚度在0.4～1mm。
  10. 根据权利要求5所述的一种多层复合锅具的制造方法，其特征在于：步骤4中，内层板材经过毛面粗化处理的端面朝向导热层(4)，外层板材经过毛面粗化处理的端面朝向导热层(4)，导热层(4)位于内层板材和外层板材之间的中部，对内层板材、导热层(4)、外层板材的中心位置进行点焊固定。
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