Teflon-plated carbon tank-operated valve core

Abstract

The invention discloses a tetrafluoro-carbon-plated tank valve element which comprises the following components: 80-90% of a metal piece; 10-15% of a rubber buffer part; the manufacturing process of the tank valve element plated with the tetrafluoro-carbon comprises the following steps that S1, a metal part is treated, specifically, the surface roughness of the metal part is adjusted, and other treatments are conducted; s2, surface treating agent treatment, wherein the surface treating agent is adopted for treating the surface of the metal part, and the surface activity of the metal part is enhanced; and S3, processing the tetrafluoro material: cutting the tetrafluoro material into sheets with proper sizes, and adding a certain amount of nano material. According to the technical scheme, the traditional technology is broken through, the metal surface is not polished but subjected to matte surface sand blasting, the uniform and fine rough surface is generated on the surface, the surface roughness after fluorine plating is not lower than that of the polished surface through the innovative fluorine plating technology, the firmness of a plating layer is greatly improved, and therefore the cycle motion service life is greatly prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, in particular to a polyfluorocarbon-plated tank movable valve core. Background Art

[0002] The moving valve core is an important control component in the car. The carbon canister moving valve core has a great influence on the sports performance of the oil car. Its service life is usually a lifetime (no replacement). The carbon canister moving valve core is formed into one piece by combining metal parts and rubber buffer parts.

[0003] Requirements for automotive carbon canister dynamic valve core: Usually passenger car laboratory tests: salt spray life 144 hours, cycle life 100 million times, operating noise level 2; high-end passenger car laboratory tests: salt spray life 280 hours, cycle life 200 million times, operating noise level 1. Traditional nickel-plated carbon canister dynamic valve cores are difficult to meet these performance requirements of high-end cars.

[0004] Materials used in manufacturing traditional carbon canister valve core: Considering noise, life, process, cost and other requirements, the metal parts are electroplated with zinc-nickel alloy; the rubber buffer is made of fluororubber or fluorosilicone. Actual product laboratory test results: salt spray life of 96 to 144 hours, movement cycle of 50 million to 100 million times, and operating noise of 2 to 3 levels. Summary of the invention

[0005] The invention aims to provide a polyfluorocarbon-plated tank moving valve core, which has the advantages of increasing salt spray life, increasing cyclic motion life and reducing noise.

[0006] To achieve the above object, the present invention provides the following technical solution: a polyfluorocarbon-plated tank valve core, comprising the following components:

[0007] Metal parts 80-90%;

[0008] Rubber buffer part 10-15%;

[0009] PTFE alloy 0.1-0.5%.

[0010] The manufacturing process of the PTFE-plated tank valve core includes the following steps:

[0011] S1 Metal parts processing: adjust the surface roughness of metal parts;

[0012] S2 Surface treatment agent treatment: Use surface treatment agent to treat the surface of metal parts to enhance its surface activity;

[0013] S3 PTFE material processing: Cut the PTFE material into sheets of appropriate size and add a certain amount of nanomaterials;

[0014] S4 plating solution preparation: prepare a plating solution containing tetrafluoride ions in a certain proportion, and control parameters such as pH value, temperature, and current density;

[0015] S5 coating preparation: placing the metal parts treated with the surface treatment agent into the plating solution for electrochemical deposition to deposit tetrafluoride ions on the surface to form a uniform and firm coating;

[0016] S6 Combination Molding: Combine the plated metal parts and PTFE materials according to the design requirements and perform compression processing to make them tightly combined;

[0017] S7 sintering treatment: The assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment to improve its hardness and durability.

[0018] Preferably, in step S1, a matte sandblasting method is adopted to produce a uniform and fine rough surface on the surface of the metal part.

[0019] Preferably, in step S4, the pH value is 2-4, the temperature is controlled at 20-30°C, and the current density is 0.5-5A / dm 2 .

[0020] Preferably, in step S4, the tetrafluoride ion concentration is 0.1-1 g / L.

[0021] Preferably, in step S7, multi-step curing temperature and ultra-high temperature curing are adopted.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Electroplating PTFE on the surface of metal parts can reduce the friction coefficient, reduce noise and increase the salt spray life (up to 280 hours).

[0024] 2. The rubber buffer part is made of fluororubber with excellent low-temperature resistance, which improves the low-temperature performance and tensile properties of the material and increases the cycle life.

[0025] 3. In the general fluorine plating process, the bonding strength between metal parts and the fluorine plating layer is poor. If it is not handled properly, the motion cycle life will be seriously reduced. This technology breaks through the traditional process. The metal surface is not polished, but matte sandblasted to produce a uniform and fine rough surface. Through the innovative fluorine plating process (multi-step curing temperature and ultra-high temperature curing), the surface roughness after fluorine plating is not lower than the polished surface, and the firmness of the coating is greatly improved, thereby greatly improving the cycle life. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] The PTFE-plated tank valve core includes the following components:

[0029] Metal parts 85%;

[0030] Rubber buffer part 14.5%;

[0031] PTFE alloy 0.5%;

[0032] The manufacturing process of the PTFE-plated tank valve core includes the following steps:

[0033] S1 Metal parts processing: adjust the surface roughness of metal parts; use matte sandblasting to make the surface of metal parts have a uniform and fine rough surface.

[0034] S2 Surface treatment agent treatment: Use surface treatment agent to treat the surface of metal parts to enhance its surface activity;

[0035] S3 PTFE material processing: Cut the PTFE material into sheets of appropriate size and add a certain amount of nanomaterials;

[0036] S4 plating solution preparation: prepare a plating solution containing tetrafluoride ions in a certain proportion, and control the pH value, temperature, current density and other parameters; the pH value is 3, the temperature is controlled at 30°C, and the current density is 3A / dm 2 , the tetrafluoride ion concentration is 0.8g / L.

[0037] S5 coating preparation: placing the metal parts treated with the surface treatment agent into the plating solution for electrochemical deposition to deposit tetrafluoride ions on the surface to form a uniform and firm coating;

[0038] S6 Combination Molding: Combine the plated metal parts and PTFE materials according to the design requirements and perform compression processing to make them tightly combined;

[0039] S7 sintering treatment: The assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment to improve its hardness and durability, using multi-step curing temperature and ultra-high temperature curing.

[0040] Embodiment 2:

[0041] The PTFE-plated tank valve core includes the following components:

[0042] Metal parts 86%;

[0043] Rubber buffer part 13.6%;

[0044] PTFE alloy 0.4%;

[0045] The manufacturing process of the PTFE-plated tank valve core includes the following steps:

[0046] S1 Metal parts processing: adjust the surface roughness of metal parts; use matte sandblasting to make the surface of metal parts have a uniform and fine rough surface.

[0047] S2 Surface treatment agent treatment: Use surface treatment agent to treat the surface of metal parts to enhance its surface activity;

[0048] S3 PTFE material processing: Cut the PTFE material into sheets of appropriate size and add a certain amount of nanomaterials;

[0049] S4 plating solution preparation: prepare a plating solution containing tetrafluoride ions in a certain proportion, and control the pH value, temperature, current density and other parameters; the pH value is 3, the temperature is controlled at 30°C, and the current density is 3A / dm 2 , the tetrafluoride ion concentration is 0.8g / L.

[0050] S5 coating preparation: placing the metal parts treated with the surface treatment agent into the plating solution for electrochemical deposition to deposit tetrafluoride ions on the surface to form a uniform and firm coating;

[0051] S6 Combination Molding: Combine the plated metal parts and PTFE materials according to the design requirements and perform compression processing to make them tightly combined;

[0052] S7 sintering treatment: The assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment to improve its hardness and durability, using multi-step curing temperature and ultra-high temperature curing.

[0053] Embodiment 3:

[0054] The PTFE-plated tank valve core includes the following components:

[0055] Metal parts 87%;

[0056] Rubber buffer part 12.7%;

[0057] PTFE alloy 0.3%;

[0058] The manufacturing process of the PTFE-plated tank valve core includes the following steps:

[0059] S1 Metal parts processing: adjust the surface roughness of metal parts; use matte sandblasting to make the surface of metal parts have a uniform and fine rough surface.

[0060] S2 Surface treatment agent treatment: Use surface treatment agent to treat the surface of metal parts to enhance its surface activity;

[0061] S3 PTFE material processing: Cut the PTFE material into sheets of appropriate size and add a certain amount of nanomaterials;

[0062] S4 plating solution preparation: prepare a plating solution containing tetrafluoride ions in a certain proportion, and control the pH value, temperature, current density and other parameters; the pH value is 3, the temperature is controlled at 30°C, and the current density is 3A / dm 2 , the tetrafluoride ion concentration is 0.8g / L.

[0063] S5 coating preparation: placing the metal parts treated with the surface treatment agent into the plating solution for electrochemical deposition to deposit tetrafluoride ions on the surface to form a uniform and firm coating;

[0064] S6 Combination Molding: Combine the plated metal parts and PTFE materials according to the design requirements and perform compression processing to make them tightly combined;

[0065] S7 sintering treatment: The assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment to improve its hardness and durability, using multi-step curing temperature and ultra-high temperature curing.

[0066] Embodiment 4:

[0067] The PTFE-plated tank valve core includes the following components:

[0068] Metal parts 88%;

[0069] Rubber buffer part 11.8%;

[0070] PTFE alloy 0.2%;

[0071] The manufacturing process of the PTFE-plated tank valve core includes the following steps:

[0072] S1 Metal parts processing: adjust the surface roughness of metal parts; use matte sandblasting to make the surface of metal parts have a uniform and fine rough surface.

[0073] S2 Surface treatment agent treatment: Use surface treatment agent to treat the surface of metal parts to enhance its surface activity;

[0074] S3 PTFE material processing: Cut the PTFE material into sheets of appropriate size and add a certain amount of nanomaterials;

[0075] S4 plating solution preparation: prepare a plating solution containing tetrafluoride ions in a certain proportion, and control the pH value, temperature, current density and other parameters; the pH value is 3, the temperature is controlled at 30°C, and the current density is 3A / dm 2 , the tetrafluoride ion concentration is 0.8g / L.

[0076] S5 coating preparation: placing the metal parts treated with the surface treatment agent into the plating solution for electrochemical deposition to deposit tetrafluoride ions on the surface to form a uniform and firm coating;

[0077] S6 Combination Molding: Combine the plated metal parts and PTFE materials according to the design requirements and perform compression processing to make them tightly combined;

[0078] S7 sintering treatment: The assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment to improve its hardness and durability, using multi-step curing temperature and ultra-high temperature curing.

[0079] Embodiment 5:

[0080] The PTFE-plated tank valve core includes the following components:

[0081] Metal parts 89%;

[0082] Rubber buffer part 10.9%;

[0083] PTFE alloy 0.1%;

[0084] The manufacturing process of the PTFE-plated tank valve core includes the following steps:

[0085] S1 Metal parts processing: adjust the surface roughness of metal parts; use matte sandblasting to make the surface of metal parts have a uniform and fine rough surface.

[0086] S2 Surface treatment agent treatment: Use surface treatment agent to treat the surface of metal parts to enhance its surface activity;

[0087] S3 PTFE material processing: Cut the PTFE material into sheets of appropriate size and add a certain amount of nanomaterials;

[0088] S4 plating solution preparation: prepare a plating solution containing tetrafluoride ions in a certain proportion, and control the pH value, temperature, current density and other parameters; the pH value is 3, the temperature is controlled at 30°C, and the current density is 3A / dm 2 , the tetrafluoride ion concentration is 0.8g / L.

[0089] S5 coating preparation: placing the metal parts treated with the surface treatment agent into the plating solution for electrochemical deposition to deposit tetrafluoride ions on the surface to form a uniform and firm coating;

[0090] S6 Combination Molding: Combine the plated metal parts and PTFE materials according to the design requirements and perform compression processing to make them tightly combined;

[0091] S7 sintering treatment: The assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment to improve its hardness and durability, using multi-step curing temperature and ultra-high temperature curing.

[0092] Comparative Examples 1-5 and Blank Experiment Group 1

[0093] Comparative Examples 1-5, Blank Experiment Group 1 and Example 1 were adjusted only in terms of curing temperature and ultra-high temperature curing.

[0094] Specifically

[0095] In comparative example 1, the assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment, wherein the stepwise curing temperatures are 1000°C, 1100°C, 1200°C and 1300°C, and the ultra-high temperature curing temperature is 2000°C.

[0096] In comparative example 2, the assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment, wherein the stepwise curing temperatures are 11000°C, 1200°C, 1300°C and 1400°C, and the ultra-high temperature curing temperature is 2100°C.

[0097] In comparative example 3, the assembled carbon canister moving valve core is placed in a high temperature furnace for high temperature sintering treatment, wherein the step curing temperatures are 1200°C, 1300°C, 1400°C and 1500°C, and the ultra-high temperature curing temperature is 2200°C.

[0098] In comparative example 4, the assembled carbon canister moving valve core is placed in a high temperature furnace for high temperature sintering treatment, wherein the stepwise curing temperatures are 1300°C, 1400°C, 1500°C and 1600°C, and the ultra-high temperature curing temperature is 2300°C.

[0099] In comparative example 5, the assembled carbon canister moving valve core is placed in a high temperature furnace for high temperature sintering treatment, wherein the step curing temperatures are 1400°C, 1500°C, 1600°C and 1700°C, and the ultra-high temperature curing temperature is 2400°C.

[0100] In blank experiment group 1, the assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment, wherein the step curing temperatures are 1000°C, 1100°C, 1200°C and 1300°C, and the ultra-high temperature curing temperature is 1500°C.

[0101] In Example 1, the assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment, wherein the stepwise curing temperatures are 1500°C, 1600°C, 1700°C and 1800°C, and the ultra-high temperature curing temperature is 2500°C.

[0102] Salt spray test

[0103] step:

[0104] Prepare samples that need to be subjected to a salt spray test, wherein the samples are comparative examples 1-5, blank experiment group 1 and embodiment 1.

[0105] Place the sample in a salt spray test chamber, set the corresponding humidity and temperature, and add salt.

[0106] Observe the corrosion of the samples after a certain period of time.

[0107] Value:

[0108] Experimental time: 280 hours.

[0109] Brine concentration: 5% NaCl solution.

[0110] Temperature: 35℃.

[0111] Humidity: 95%

[0112] Cyclic motion experiment:

[0113] step:

[0114] Prepare the samples for the cyclic motion experiment.

[0115] The samples were subjected to cyclic motion tests and the life of the samples was recorded.

[0116] Value:

[0117] Number of cycles: 200 million times.

[0118] Run the noise experiment:

[0119] step:

[0120] Prepare the samples and test instruments needed for the running noise experiment.

[0121] The sample is run tested and the noise generated by the sample is recorded simultaneously.

[0122] Value:

[0123] Noise level: Level 1.

[0124] Test distance: 1 meter.

[0125] The test results are shown in the following table:

[0126] Salt spray test Cyclic motion experiment Running a Noise Experiment Comparative Example 1 Obvious corrosion damage Obvious noise Comparative Example 2 Obvious corrosion damage Obvious noise Comparative Example 3 Obvious corrosion damage Obvious noise Comparative Example 4 Less corrosion damage Obvious noise Comparative Example 5 Less corrosion damage Less noise Blank experimental group 1 Severe corrosion damage Obvious noise Example 1 No corrosion Normal operation Slight noise

[0127] It can be seen from the above table that the PTFE-plated tank moving valve core designed by this technical solution has a salt spray life of more than 280 hours, a motion cycle life of 200 million times, and an operating noise of level 1.

[0128] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0129] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The PTFE-plated tank valve core is characterized by: It includes the following components: Metal parts 80-90%; Rubber buffer part 10-15%; PTFE alloy 0.1-0.5%; 2. The manufacturing process of the PTFE-plated tank moving valve core is characterized by comprising the following steps: S1 Metal parts processing: adjust the surface roughness of metal parts; S2 Surface treatment agent treatment: Use surface treatment agent to treat the surface of metal parts to enhance its surface activity; S3 PTFE material processing: Cut the PTFE material into sheets of appropriate size and add a certain amount of nanomaterials; S4 plating solution preparation: prepare a plating solution containing tetrafluoride ions in a certain proportion, and control parameters such as pH value, temperature, and current density; S5 coating preparation: placing the metal parts treated with the surface treatment agent into the plating solution for electrochemical deposition to deposit tetrafluoride ions on the surface to form a uniform and firm coating; S6 Combination Molding: Combine the plated metal parts and PTFE materials according to the design requirements and perform compression processing to make them tightly combined; S7 sintering treatment: The assembled carbon canister moving valve core is placed in a high-temperature furnace for high-temperature sintering treatment to improve its hardness and durability.

3. The manufacturing process of the PTFE-plated tank valve core according to claim 2 is characterized in that: In the step S1, a matte sandblasting method is adopted to make the surface of the metal part have a uniform and fine rough surface.

4. The manufacturing process of the PTFE-plated tank valve core according to claim 2 is characterized in that: In step S4, the pH value is 2-4, the temperature is controlled at 20-30°C, and the current density is 0.5-5A / dm 2 .

5. The manufacturing process of the PTFE-plated tank valve core according to claim 2 is characterized in that: In the step S4, the tetrafluoride ion concentration is 0.1-1 g / L.

6. The manufacturing process of the PTFE-plated tank valve core according to claim 2 is characterized in that: In the step S7, multi-step curing temperature and ultra-high temperature curing are adopted.