CN1100344A - A surface processing method for making the surface of a metal pan have characteristics such as high hardness and non-stick properties - Google Patents

Abstract

The invention relates to a surface processing method for making the surface of a work piece have the characteristics of high hardness, non-stick property and the like, which comprises the first step of respectively carrying out high-pressure aluminum oxide spraying treatment on the surface of the work piece to make the surface of the work piece clean and rough: a second step of uniformly coating the electric melting wire on the first electric melting wire coating layer on the surface of the workpiece; and a third step of spraying high-Pressure Teflon (PTFE) on the surface of the workpiece, and then sintering at a proper high temperature to form at least one Teflon (PTFE) coating layer on the surface of the workpiece.

Description

The invention relates to a surface processing method for making the surface of a metal pan have characteristics such as high hardness and non-stick property.

The original applicant of this application submitted a patent application with application number 01904860.7 to the China Patent Office on July 21, 1990. The application once disclosed a method for making the surface of a work object (such as a metal pot) have high hardness. Surface processing methods with characteristics such as non-stick properties, such as aluminum hydride supply machines, electric melting machines, Teflon (PTFE) supply machines, and work objects whose surfaces are fully processed on the above materials, etc. The invention is characterized in that: the first step is to apply high-pressure (5-8Kg/cm ² or more) alumina (60#-80#) spraying treatment on the surface of the workpiece to make the surface of the workpiece clean and rough; Made of electric fusion wire metal, (the metal material can be made of copper, zinc, chromium, aluminum, carbon steel and stainless steel to be alloyed) subjected to high temperature (4500-8000 ℃) high pressure (5-8Kg/cm ² ) The voltage and current of the arc (DC30V-40V, 100A-300A) is coated on the surface of the work object at a cooling rate of 10 ⁶ DGE/F/sec in the molten state, so as to form the first layer of electric fusion wire that enhances the surface hardness of the work object The coating layer is the second step; the surface of the workpiece is sprayed with high-pressure (4Kg/cm ² ) Teflon (PTFE), and then fired at high temperature (420°C/5min) to form at least one layer on the surface of the workpiece. The third step is the non-stick Teflon (PTFE) layer above the layer and the coating layer that can strengthen the hardness.

The design originally applied for did make the surface of the working object (such as a metal pot) have a high hardness and non-stick surface. However, when the original design began to be commercialized, the inventor artificially made the Teflon (PTFE) coating layer It can be more perfectly implemented in actual productization. The inventor has more than ten years of experience in surface processing of Teflon (PTFE), and after many experiments, this new invention came into being.

The main purpose of the present invention is to provide a surface processing method for spraying the Teflon coating layer after productization, so that the surface of the work object has characteristics such as high hardness and non-stick property.

The present invention is described in detail below in conjunction with accompanying drawing and embodiment;

Figure 1 is a schematic diagram of the first step of a preferred embodiment of the present invention.

Fig. 2 is a schematic diagram of the second step of the preferred embodiment of the present invention.

Fig. 3 is a schematic diagram of the third step of the preferred embodiment of the present invention.

Figure 4 is a schematic diagram of Teflon layer spraying in a preferred embodiment of the present invention.

FIG. 5 is another schematic diagram of the third step of a preferred embodiment of the present invention.

Please refer to Fig. 1, which is a schematic diagram of the first step of a preferred embodiment of the present invention. Fig. 1 shows the action of aluminum oxide spraying on the surface of a work object (hereinafter all taking the metal pot body 1 as an example), so that the The surface roughness of the metal pot body 1 after spraying is 4.5-5.5 μm (referring to the center line average roughness value Ra), and the metal pot body 1 is a pot body that has been formed by forging or other mechanical processing methods, and its The material is metal (such as iron, steel, copper and aluminum, etc.).

Please refer to Fig. 1, at first, connect nozzle pipe 3 by the high-pressure air source 2 that can produce compressed air, and the upper edge of described nozzle pipe 3 is connected to hold the powdered aluminum oxide 4 that particle size is 60#-80# The funnel 31 keeps an appropriate distance between the discharge port 32 of the nozzle 3 and the surface of the workpiece 1, and continues to release high-pressure (5-8Kg/cm ² ) air with powdered alumina 4 through the high-pressure air source 2. The nozzle 32 of the nozzle 3 hits the surface of the metal pot 1, so that the surface of the metal pot 1 is cleaned and roughened (the Ra after spraying is 4.5-5.5 μm), so as to facilitate the implementation of the next step. Spraying powdered alumina 4 is mainly to achieve surface roughening, degreasing and cleaning, so that the cohesion and adhesion of the coating can be greatly improved because of this specific roughness Ra value, otherwise it will affect To the future coating and mechanical strength of the finished product.

Please refer to Fig. 2 again, which is a schematic diagram of the second step of the preferred embodiment of the present invention. After the surface of the metal pot 1 is cleaned and roughened by the above-mentioned surface cleaning and roughening treatment, it will continue to be heated by high temperature (4500-8000 ° C) and high pressure (5Kg/ cm ² -8Kg/cm ² ) The arc device 5 hardens the surface of the metal pot body 1, and the arc device 5 is also connected to the high-voltage power supply 2, and is formed for two electric fusion wires 6 (which can be metal wires) to be transported to the arc generation The two channels 51, 52 on the mouth, and the two electric fusion wires 6 in between input DC30V-40V, 100A-300A current at the same time, and the two electric fusion wires 6 are transported to the arc generation port one by one through the roller set 54 in the molten state 53. At this time, since the two electric fusion wires 6 are both connected with a current of DC30V-40V, 100A-300A, when the two electric fusion wires 6 are gradually approaching, an arc effect will be caused and a temperature as high as 4500-8000°C will be generated (Of course, this temperature can be properly adjusted according to the material of the wire). At this high temperature, the two electrofusion wires 6 will be melted into a liquid state, and the liquid electrofusion wires 6 will be sprayed on the surface of the metal pot body 1 with the high-pressure gas supplied by the high-pressure gas source 2, and the arc generation port 53 The distance to the metal pot body 1 is about 20-50cm, and the speed of the spray is about 100m-300m/sec.

Please refer to Fig. 2, the surface of the metal pot body 1 after surface cleaning and roughening treatment is conducive to the adhesion of the liquid electric fusion wire 6, and the electric fusion wire 6 in the molten state is sprayed from its outlet end The distance from the metal pot body 1 makes it have a cooling rate of 10 ⁶ DGE/°F/sec, and under the conditions of this cooling rate, the surface temperature of the metal pot body 1 is generally between 60 degrees Celsius and 150 degrees Celsius The above-mentioned temperature will never cause deformation of the metal pot body 1, even a thin metal plate will not be deformed. The above-mentioned first layer of electrofusion wire coating layer 11 coated on the surface of the metal pot body 1 is the main reason for enhancing the surface hardness of the metal pot body 1 after it becomes a formal product. It depends on the material, and the material of the above-mentioned electric fusion wire is metal (such as copper, zinc, nickel, chromium, aluminum, carbon steel and stainless steel, etc.), and the above-mentioned various metal materials can be easily melted at a temperature of 4500 ° C. In addition, when the metal pot body 1 is sprayed with the electrofusion wire coating layer 11, the average thickness at the center line is 5.0-8.0 μm, and the film thickness of the electrofusion wire coating layer is 40-90 μm.

Fig. 3 is a schematic diagram of the third step of a preferred embodiment of the present invention, and Fig. 4 is a schematic diagram of Teflon layer spraying, as can be seen from the figure, after the surface of the metal pot body 1 is treated with the hardness strengthening treatment of the coating layer 11 of the electric fusion wire rod, it continues to be processed by The nozzle pipe 8 containing Teflon 7 (PTFE) is similarly connected to the aforementioned high-pressure gas source 2, and the first layer of Teflon layer 71 (PTFE) is sprayed on the surface of the metal pot body 1 . At this time, the surface of the metal pot 1 can be heated to 90-100°C for about 5-10 minutes, so that Teflon 7 (PTFE) is dry and attached to the surface of the metal pot 1 to form the first layer of Teflon. Dragon (PTFE) coating layer 71 (commonly known as PRIMER COATING), and the substance sprayed on this layer is Teflon resin (FLUOROCARBON RESIN) with a higher content, followed by adhesive (BINDER RESIN), and then a small amount The coloring agent (PIGMENT) and surfactant (SURFACE ACTIVE), and the composition ratio of the above substances is about 30-40%, the rest of the ingredients are solvent (SOLVENT, such as water), and the thickness of this coating is about 5 -10 μm.

Fig. 5 is a schematic diagram of the third step of the preferred embodiment of the present invention. It can be seen from the figure that the second layer of Teflon layer 72 (PRFE) spraying (commonly known as TOP COATING) is carried out on the surface of the metal pot body 1. At this time, the surface of the metal pot 1 is also heated to 90-100°C for about 5-10 minutes, so that the Teflon 7 (PTFE) is dry and attached to the surface of the metal pot 1 to form the second layer Teflon (PTFE) coating layer 72, and the substance sprayed on this layer is Teflon resin (FLUORO-CARBON RESIN) with a high content, followed by a small amount of colorant (PIGMENT) and surfactant (SURFACE ACTIVE), and the proportion of the following substances is about 40-50%, and the rest of the ingredients are solvents (SOLVENT, such as water), but there is no adhesive (BINDER RESIN) in this layer, and the thickness of this coating is about 15-20μm.

Finally, spray the third layer of Teflon layer 73 (PTFE) on the surface of the metal pot body 1 (commonly known as CLEAR COATING). Minutes, so that Teflon 7 (PTFE) is dry and attached to the surface of the metal pot body 1, forming a third layer of Teflon (PTFE) coating layer 73, and the material sprayed on this layer is Teflon with a relatively high content. Dragon resin (FLUOROCARBONRESIN), followed by a small amount of surfactant (SURFACE ACTIVE), and the proportion of the above substances is about 60% or less, and the rest is solvent (SOLVENT, such as water), but this layer has no coloring The composition of the agent (PIGMEN) and the adhesive (BINDER RE-SIN), and the thickness of the coating is about 3-6μm, and the average thickness outside the center line after coating in this way is 2.5-5.5μm, and the coating The total thickness of the coating is 23-36 μm, while the hardness of the surface of the metal pot body 1 is maintained at 8H-9H, which is higher than the general 2H-3H, and the surface of the metal pot body 1 is indeed non-stick.

Among the so-called above-mentioned coating materials, the one with the most ingredients is Teflon resin (FLUOROCARBON RESIN), the content of colorant (PIGMENT) is very small for Teflon resin (FLUOROCARBON RESIN), and the content of surfactant (SURFACE ACTIVE) and the colorant (PIGMENT) have the same content or can be a relatively small amount, and in order to improve the adhesion to the metal pot body 1, in addition to the Teflon resin (FLUOROCARBON RESIN), the aforementioned adhesive (BINDER RESIN) is usually added ), its content is less than 1/3 of that of Teflon resin (FLUOROCARBON RESIN).

To sum up, the steps of the present invention can be implemented continuously to form a multi-layer Teflon (PTFE) coating layer on the surface of the metal pot body 1 . Moreover, the Teflon (PTFE) coating layer can completely penetrate into the grooves on the surface of the electrofusion wire coating layer, and with the support of the hard body of the electrofusion wire coating layer, the overall Teflon (PTFE) coating layer is improved. The adhesion and hardness of the coating layer, as for the hardness test value, can be measured by a common pencil hardness tester or steel hardness tester in the market, and will not be described in detail here.

Therefore, from the above description of the implementation steps, it can be seen that the present invention can produce the following advantages and effects:

1. For general metal and non-metallic objects, the present invention can be used to enhance the hardness and non-stick property of the surface of the objects, and the application range is extremely wide.

2. Implement high temperature and high pressure electric fusion wire coating, so that the hardness and corrosion resistance of the article are greatly improved.

3. Additional continuous multi-layer Teflon (PTFE) coating layer makes the article not only have a smooth surface, but also can cooperate with the above-mentioned electric fusion wire coating layer to resist external friction and have non-stick properties, and the service life is extended.

4. Strong non-stick property of oil stains, easy to clean and maintain.

Claims (6)

1, a kind of working substance surface that makes has high rigidity, the surface treatment method of characteristic such as being stained with property not, and possess has aluminium oxide to supply with mechanical, electrical molten machine, Teflon (PTFE) supply machine and above-mentioned material to finish the working substance that processing is handled on its surface comprehensively; Described method comprises respectively working substance surface high-pressure aluminium oxide spray treatment, makes working substance reach the first step of cleaning surfaces, alligatoring; The electric smelting wire rod evenly is coated on second step of the ground floor electric smelting wire rod coat on working substance surface; And with Teflon (PTFE) spraying of working substance surface high-pressure, impose proper temperature again and burn till, make the working substance surface be formed with the third step of above Teflon (PTFE) coat of one deck at least; It is characterized in that: the process of teflon layer (PTFE) spraying is carried out on described working substance surface, be earlier the working substance surface to be heated to 90-100 ℃, then about 5-10 minute of time, make Teflon (PTFE) be attached to the working substance surface with being dry shape, form one deck Teflon (PTFE) coat (being commonly called as PRIMERCOA-TING), and the material that this layer the sprayed higher Teflon resin (FLUOROCARBON RESIN) that is content, secondly be adhesive agent (BINDERRESIN), and the colouring agent (PIGMENT) of trace and interfacial agent (SURFACE ACTIVE), and the composition ratio of above each material is about 30-40% altogether, remaining composition is a solvent, and the thickness of this coating is about 5-10 μ m.

2, the working substance surface that makes according to claim 1 has high rigidity.The surface treatment method of characteristic such as being stained with property not, it is characterized in that: through the working substance after the described step process, its center line average boldness value is 4.5-5.5 μ m.

3, the working substance surface that makes according to claim 1 has high rigidity, the surface treatment method of characteristic such as being stained with property not, it is characterized in that: also can carry out second layer teflon layer (PTFE) spraying (being commonly called as TOPCOATING) to the working substance surface again, at this moment, the working substance surface will be heated to 90-100 ℃ too, then about 5-10 minute of time, make Teflon (PTFE) be attached to the working substance surface with being dry shape, form second layer Teflon (PTFE) coat, and this layer sprays attached material is the higher PTFE resin of content (FLUOROCARBON RESIN), secondly be the colouring agent (PIGMGNT) and interfacial agent (SURFACE AC-TIVE) of trace, and the composition ratio of above each material is about 40-50% altogether, remaining composition is a solvent, and the thickness of this coating is about 15-20 μ m.

4, the working substance surface that makes according to claim 3 has high rigidity, the surface treatment method of characteristic such as being stained with property not, it is characterized in that: the working substance after described second layer teflon layer (PTFE) spraying step process, its centerline average boldness value is 5.0-8.0 μ m, and the thickness of its electric smelting wire rod coat is 40-90 μ m.

5, the working substance surface that makes according to claim 3 has high rigidity, the surface treatment method of characteristic such as being stained with property not, it is characterized in that: after described second layer teflon layer (PTFE) spraying, also can carry out the 3rd layer of teflon layer (PTFE) spraying (being commonly called as CLEAR COATING) to the working substance surface again, at this moment, the working substance surface must promote and be heated to 400-420 ℃, about 3-5 of time minute, make Teflon (PTFE) be attached to the working substance surface with being dry shape, form the 3rd layer of Teflon (PTFE) coat, and the material that relevant this layer the sprayed higher Teflon resin (FIUOROCARBON RESIN) that is content, secondly be the interfacial agent (SURFACE ACTIVE) of trace, and the composition ratio of above each material is about below 60% altogether, remaining composition is a solvent, and the thickness of this coating is about 3-6 μ m.

6, the working substance surface that makes according to claim 5 has high rigidity, the surface treatment method of characteristic such as being stained with property not, it is characterized in that: described through the working substance after the 3rd layer of teflon layer (PTFE) the spraying step process, its centerline average boldness value is 2.5-5.5 μ m.

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