Nano-coating vacuum spraying device, spraying material and application of spraying material in preparation of PCB (Printed Circuit Board)

Abstract

The invention belongs to the field of nanometer spraying, and particularly discloses a nanometer coating vacuum spraying device and a nanometer coating spraying material.The device comprises a base, adjustable foot supports, a raw material storage device, a raw material premixing device, a high-pressure spraying device, a vacuum spraying chamber, a workpiece temporary storage table and other components; and mixing, high-pressure spraying and vacuum treatment of the nano material can be realized. The nano coating spraying material is composed of a component A and a component B, the component A comprises isocyanate MDI and other raw materials, the component B comprises bisphenol A epoxy resin and other raw materials, and the nano coating spraying material is prepared through a specific technology. After the component A and the component B are mixed according to a certain proportion, the device is used for spraying. The invention further provides a method for preparing the PCB by using the device and the material, the method comprises a preparation stage, a raw material mixing stage, a high-pressure spraying preparation stage, a vacuum spraying stage and a spraying completion and post-treatment stage, and a specific spraying parameter range is given.

Description

Technical Field

[0001] The invention belongs to the field of nano spraying devices and materials, and specifically discloses a nano coating vacuum spraying device, a spraying material and an application thereof in preparing a PCB board. Background Art

[0002] In modern industrial production, nano coating technology has attracted much attention due to its unique performance and application prospects. Nano coating can provide excellent wear resistance, corrosion resistance, scratch resistance and other properties for the workpiece surface, and is widely used in electronics, automobiles, aerospace and other fields. However, there are still some shortcomings in the existing nano coating spraying technology.

[0003] Traditional nano-coating spraying devices are often complex in structure, cumbersome to operate, and difficult to achieve accurate mixing and efficient spraying of raw materials. Specifically, the raw material storage and mixing devices in the prior art are usually set separately, requiring manual handling and mixing of raw materials, which not only increases labor intensity, but also easily leads to raw material contamination or imbalance due to improper operation. In addition, traditional spraying devices often cannot provide a stable spraying environment and precise spraying parameter control during the spraying process, thereby affecting the uniformity and quality of the coating.

[0004] In terms of spraying materials, existing nano-coating spraying materials often have problems such as single components and limited performance, mainly because their pressure resistance and wear resistance are not outstanding enough.

[0005] Therefore, there is an urgent need for a nano-coating vacuum spraying device with a simple structure, easy operation, and the ability to achieve precise mixing of raw materials and efficient spraying, as well as a nano-coating spraying material with excellent performance, strong adaptability, and the ability to meet the needs of different workpieces. Summary of the invention

[0006] To solve the above problems, we disclose a nano coating vacuum spraying device, a spraying material and its application in preparing PCB boards.

[0007] The present invention includes the following specific technical solutions:

[0008] A nano coating vacuum spraying device, comprising: a base, an adjustable foot support, a raw material storage device, a raw material pre-mixing device, a high-pressure spraying device, a vacuum spraying chamber, and a workpiece temporary storage table;

[0009] The base serves as the support of the entire device and carries all other components. Adjustable feet are installed at the four corners of the base. The raw material storage device is located on one side above the base and is used to store nanomaterials required for spraying. The device is connected to the raw material pre-mixing device through a pipeline. The raw material pre-mixing device is located on one side of the raw material storage device and is used to mix multiple raw materials evenly in proportion. The mixed materials are sent to the high-pressure spraying device through the conveying system. The high-pressure spraying device is connected to the vacuum spraying chamber through a pipeline. The workpiece temporary storage table is located on one side of the base and close to the vacuum spraying chamber.

[0010] Furthermore, in the above-mentioned nano-coating vacuum spraying device, the vacuum spraying chamber is provided with a workpiece access window.

[0011] Furthermore, in the above-mentioned nano-coating vacuum spraying device, the raw material storage device has two separate storage devices A and B.

[0012] Furthermore, the above-mentioned nano-coating vacuum spraying device comprises two components, A and B, and when used, the components A and B are fully mixed;

[0013] The A component is made of the following raw materials by weight:

[0014]

[0015] The preparation method is as follows:

[0016] Premixing: put isocyanate, catalyst, plasticizer and most of the additives into a mixing container, turn on the agitator at 150-300rpm for preliminary mixing, the temperature is 60-80℃;

[0017] Add filler: Add filler slowly while stirring to avoid agglomeration caused by adding too much at one time. Continue stirring until the filler is evenly dispersed in the mixture;

[0018] Viscosity adjustment: The viscosity is adjusted to between 120 and 150 mPa·s by adding the remaining additives to obtain component A.

[0019] Furthermore, in the above-mentioned nano-coating vacuum spraying device, the component B is composed of the following raw materials in parts by weight:

[0020]

[0021] The preparation method is as follows:

[0022] Premixing: Premix styrene-butadiene rubber particles, alumina ceramic powder, γ-aminopropyl triethoxysilane and silicone leveling agent according to the formula ratio to ensure uniform distribution of each component;

[0023] High-speed dispersion: Add the premixed materials into a high-speed disperser and mix them with bisphenol A epoxy resin at high speed. The process temperature is 100-120°C, the stirring speed is 400-600rpm, the reaction time is 1-2h, and the mixture is cooled to room temperature to obtain component B.

[0024] Furthermore, in the above-mentioned nano-coating vacuum spraying device, the mass ratio of components A and B is 1-3:1.

[0025] The invention also discloses the application of the nano coating spray material in preparing PCB board materials.

[0026] Furthermore, the above application includes the following steps:

[0027] S1 preparation stage:

[0028] Check whether all parts of the device are intact, ensure that the base is stable, and the adjustable feet have been adjusted to the appropriate height according to actual needs;

[0029] Check whether the nanomaterials in the raw material storage devices A and B are sufficient, and confirm that the types of materials meet the spraying requirements;

[0030] Prepare the workpiece to be sprayed and place it on the workpiece temporary storage table for subsequent operations;

[0031] S2 Raw material mixing stage:

[0032] Open the outlet valves of the raw material storage devices A and B to allow the required nanomaterials to flow into the raw material premixing device through the pipeline;

[0033] According to the spraying formula, adjust the mixing ratio in the raw material pre-mixing device, start the mixing equipment, and fully mix the various raw materials;

[0034] After the mixing is completed, the mixing device is closed and the mixed material is ready to be transported to the high-pressure spraying device;

[0035] S3 high pressure spraying preparation stage:

[0036] Check whether all parts of the high-pressure spray device are in normal working condition and ensure that the spray gun tip is clean and unblocked;

[0037] Start the conveying system of the high-pressure spraying device to convey the mixed nanomaterials from the raw material premixing device to the hopper or storage tank of the high-pressure spraying device;

[0038] S5 vacuum spraying stage:

[0039] Take the workpiece to be sprayed from the temporary storage table and put it in the designated position in the vacuum spraying room; close the door of the vacuum spraying room, start the vacuum pump, and extract the air in the spraying room to achieve the required vacuum degree; start the high-pressure spraying device to spray the mixed nanomaterials evenly onto the surface of the workpiece through the spray gun head under high pressure; adjust the spraying parameters, including spraying pressure and spraying distance, according to the spraying requirements and workpiece characteristics;

[0040] S6 spraying completion and post-processing stage:

[0041] After spraying is completed, turn off the high-pressure spraying device and the vacuum pump, open the door of the vacuum spraying room, and take out the sprayed workpiece.

[0042] Furthermore, in the above application, the spraying vacuum is 100-500Pa; the spraying pressure is 1-5Mpa, the spraying distance is 3-6cm, and the spraying thickness is 5-50 microns.

[0043] Compared with the prior art, the present invention has the following outstanding beneficial effects:

[0044] The nano coating vacuum spraying device and spraying material of the present invention achieve the goals of simple operation and efficient spraying through integrated design and precise raw material mixing technology. The spraying material is composed of two components A and B, and is prepared through a specific process. It has excellent wear resistance, scratch resistance and other properties, and has strong adaptability, and can meet the diverse requirements of different workpieces for coating performance. At the same time, parameters such as vacuum degree, spraying pressure, and spraying distance during the spraying process are all controllable, ensuring the uniformity and high quality of the coating. The emergence of the present invention provides a new solution for the development and application of nano coating technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Schematic diagram of the nano coating vacuum spraying device according to the present invention.

[0046] Figure 2 Compressive strength (kpa) test results of the nano coating in the test example;

[0047] Figure 3 Test results of the wear resistance (number of times) of the nano coating in the test example. DETAILED DESCRIPTION

[0048] A nano coating spray material, comprising two components A and B, which are fully mixed when used;

[0049] The A component is made of the following raw materials by weight:

[0050]

[0051] The preparation method is as follows:

[0052] Premixing: Place isocyanate MDI, dibutyltin dilaurate, dioctyl phthalate and most of the additives in a mixing container, turn on the agitator at 150-300 rpm for preliminary mixing, and the temperature is 60-80°C;

[0053] Add filler: Slowly add filler nano-silica under stirring to avoid adding too much at one time to cause agglomeration, and continue stirring until the filler is evenly dispersed in the mixed liquid;

[0054] Viscosity adjustment: adjusting the viscosity to between 120 and 150 mPa·s by adding the remaining additives to obtain component A, wherein the additives include a leveling agent or a viscosity modifier;

[0055] The B component is composed of the following raw materials:

[0056]

[0057] The preparation method is as follows:

[0058] Premixing: Premix styrene-butadiene rubber particles, alumina ceramic powder, γ-aminopropyl triethoxysilane and silicone leveling agent according to the formula ratio to ensure uniform distribution of each component;

[0059] High-speed dispersion: Add the premixed materials into a high-speed disperser and mix them with bisphenol A epoxy resin at high speed. The process temperature is 100-120°C, the stirring speed is 400-600rpm, the reaction time is 1-2h, and the mixture is cooled to room temperature to obtain component B.

[0060] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0061] Example 1

[0062] like Figure 1 A nano coating vacuum spraying device shown includes: a base 100, an adjustable foot support 110, a raw material storage device 120, a raw material pre-mixing device 130, a high-pressure spraying device 140, a vacuum spraying chamber 150, and a workpiece temporary storage table 160;

[0063] The base 100 serves as the support of the entire device and carries all other components. The adjustable foot supports 110 are installed at the four corners of the base. The raw material storage device 120 is located on one side above the base 100 and is used to store nanomaterials required for spraying. The device is connected to the raw material pre-mixing device 130 through a pipeline. The raw material pre-mixing device 130 is located on one side of the raw material storage device 120 and is used to mix multiple raw materials evenly in proportion. The mixed materials are sent to the high-pressure spraying device 140 through a conveying system. The high-pressure spraying device 140 is connected to the vacuum spraying chamber 150 through a pipeline. The workpiece temporary storage table 160 is located on one side of the base 100 and is close to the vacuum spraying chamber 150.

[0064] Preferably, the vacuum spray chamber 150 is provided with a workpiece access window;

[0065] Preferably, the raw material storage device 120 has two separate storage devices A and B.

[0066] Example 2

[0067] A nano coating spray material, comprising two components A and B, which are fully mixed at a weight ratio of 1:1 when used;

[0068] The A component is made of the following raw materials by weight:

[0069]

[0070] The preparation method is as follows:

[0071] Premixing: Place isocyanate MDI, dibutyltin dilaurate, dioctyl phthalate and most of the additives in a mixing container, turn on the agitator at 150-300 rpm for preliminary mixing, and the temperature is 60-80°C;

[0072] Add filler: Slowly add filler nano-silica under stirring to avoid adding too much at one time to cause agglomeration, and continue stirring until the filler is evenly dispersed in the mixed liquid;

[0073] Viscosity adjustment: adjusting the viscosity to between 120 and 150 mPa·s by adding the remaining additives to obtain component A, wherein the additives include a leveling agent or a viscosity modifier;

[0074] The B component is composed of the following raw materials:

[0075]

[0076] The preparation method is as follows:

[0077] Premixing: Premix styrene-butadiene rubber particles, alumina ceramic powder, γ-aminopropyl triethoxysilane and silicone leveling agent according to the formula ratio to ensure uniform distribution of each component;

[0078] High-speed dispersion: Add the premixed materials into a high-speed disperser and mix them with bisphenol A epoxy resin at high speed. The process temperature is 100-120°C, the stirring speed is 400-600rpm, the reaction time is 1-2h, and the mixture is cooled to room temperature to obtain component B.

[0079] Example 3

[0080] A nano coating spray material, comprising two components A and B, which are fully mixed at a weight ratio of 2:1 when used;

[0081] The A component is made of the following raw materials by weight:

[0082]

[0083] The preparation method is as follows:

[0084] Premixing: Place isocyanate MDI, dibutyltin dilaurate, dioctyl phthalate and most of the additives in a mixing container, turn on the agitator at 150-300 rpm for preliminary mixing, and the temperature is 60-80°C;

[0085] Add filler: Slowly add filler nano-silica under stirring to avoid adding too much at one time to cause agglomeration, and continue stirring until the filler is evenly dispersed in the mixed liquid;

[0086] Viscosity adjustment: adjusting the viscosity to between 120 and 150 mPa·s by adding the remaining additives to obtain component A, wherein the additives include a leveling agent or a viscosity modifier;

[0087] The B component is composed of the following raw materials:

[0088]

[0089] The preparation method is as follows:

[0090] Premixing: Premix styrene-butadiene rubber particles, alumina ceramic powder, γ-aminopropyl triethoxysilane and silicone leveling agent according to the formula ratio to ensure uniform distribution of each component;

[0091] High-speed dispersion: Add the premixed materials into a high-speed disperser and mix them with bisphenol A epoxy resin at high speed. The process temperature is 100-120°C, the stirring speed is 400-600rpm, the reaction time is 1-2h, and the mixture is cooled to room temperature to obtain component B.

[0092] Example 4

[0093] A nano coating spray material, comprising two components A and B, which are fully mixed at a weight ratio of 3:1 when used;

[0094] The A component is made of the following raw materials by weight:

[0095]

[0096] The preparation method is as follows:

[0097] Premixing: Place isocyanate MDI, dibutyltin dilaurate, dioctyl phthalate and most of the additives in a mixing container, turn on the agitator at 150-300 rpm for preliminary mixing, and the temperature is 60-80°C;

[0098] Add filler: Slowly add filler nano-silica under stirring to avoid adding too much at one time to cause agglomeration, and continue stirring until the filler is evenly dispersed in the mixed liquid;

[0099] Viscosity adjustment: adjusting the viscosity to between 120 and 150 mPa·s by adding the remaining additives to obtain component A, wherein the additives include a leveling agent or a viscosity modifier;

[0100] The B component is composed of the following raw materials:

[0101]

[0102] The preparation method is as follows:

[0103] Premixing: Premix styrene-butadiene rubber particles, alumina ceramic powder, γ-aminopropyl triethoxysilane and silicone leveling agent according to the formula ratio to ensure uniform distribution of each component;

[0104] High-speed dispersion: Add the premixed materials into a high-speed disperser and mix them with bisphenol A epoxy resin at high speed. The process temperature is 100-120°C, the stirring speed is 400-600rpm, the reaction time is 1-2h, and the mixture is cooled to room temperature to obtain component B.

[0105] Comparative Example 1

[0106] The reinforcing resin in component B is not contained, and the other parts are the same as those in Example 3.

[0107] Comparative Example 2

[0108] The reinforcing resin and impact modifier in component B are not contained, and the other parts are the same as those in Example 3.

[0109] Comparative Example 3

[0110] Component B is not contained, and the rest is the same as in Example 3.

[0111] Test Case

[0112] The spraying materials of Examples 2-4 and Comparative Examples 1-3 are sprayed onto a PCB board using the nano-coating vacuum spraying device shown in Example 1, comprising the following steps:

[0113] S1 preparation stage:

[0114] Check whether all parts of the device are intact, ensure that the base 100 is stable, and the adjustable foot support 110 has been adjusted to a suitable height according to actual needs;

[0115] Check whether the nanomaterials in the raw material storage devices 120A and B are sufficient, and confirm that the types of materials meet the spraying requirements;

[0116] Prepare the workpiece to be sprayed and place it on the workpiece temporary storage table 160 to facilitate subsequent operations;

[0117] S2 Raw material mixing stage:

[0118] Open the outlet valves of the raw material storage devices 120A and B to allow the required nanomaterials to flow into the raw material premixing device 130 through the pipeline;

[0119] According to the spraying formula, the mixing ratio in the raw material pre-mixing device 130 is adjusted, and the mixing device is started to fully mix the various raw materials;

[0120] After the mixing is completed, the mixing device is closed and the mixed material is ready to be transported to the high-pressure spraying device 140;

[0121] S3 high pressure spraying preparation stage:

[0122] Check whether all components of the high-pressure spray device 140 are in normal working condition and ensure that the spray gun tip is clean and unblocked;

[0123] Start the conveying system of the high-pressure spraying device to convey the mixed nanomaterials from the raw material premixing device 130 to the hopper or storage tank of the high-pressure spraying device 140;

[0124] S5 vacuum spraying stage:

[0125] The workpiece to be sprayed is taken off the workpiece temporary storage table 160 and placed in a designated position in the vacuum spray chamber 150; the door of the vacuum spray chamber is closed, and the vacuum pump is started to extract the air in the spray chamber to achieve the required vacuum degree; the high-pressure spray device 140 is started to spray the mixed nanomaterials evenly onto the surface of the workpiece through the spray gun head under high pressure; the spray parameters, including spray pressure and spray distance, are adjusted according to the spray requirements and the characteristics of the workpiece;

[0126] S6 spraying completion and post-processing stage:

[0127] After spraying is completed, the high-pressure spraying device 140 and the vacuum pump are turned off, the door of the vacuum spraying room is opened, and the sprayed workpiece is taken out.

[0128] Among them, the spraying vacuum degree is 100-500Pa; the spraying pressure is 3Mpa, the spraying distance is 5cm, and the spraying thickness is 20 microns.

[0129] The obtained nano-coating on the PCB was subjected to performance testing.

[0130] The compressive strength of the coating was measured (the pressure kPa at which the PCB board breaks) (a negative control was added, i.e., a PCB board without coating), and a 1000g weight was rubbed with 0000# steel wool to detect the wear resistance (number of times) of the coating. The hardness of the coating was tested according to ASTM D3363-2005. The results are shown in Table 1 and Figure 2 and 3 shown.

[0131] Table 1 Nano coating performance test

[0132]

[0133] From the data in Table 1 above, it can be seen that the nano coating prepared by the equipment and materials of the present invention has a significant effect on increasing the compressive strength, wear resistance and hardness of the PCB board. The spraying material is composed of two components, A and B, and is prepared through a specific process. It has excellent wear resistance, anti-scratch properties, and strong adaptability, which can meet the diverse requirements of different workpieces for coating performance.

[0134] The above are only a few preferred embodiments of the present invention, which are described in a more specific and detailed manner, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A nano coating vacuum spraying device, characterized in that: include: A base (100), an adjustable foot support (110), a raw material storage device (120), a raw material pre-mixing device (130), a high-pressure spraying device (140), a vacuum spraying chamber (150), and a workpiece temporary storage table (160); The base (100) serves as a support for the entire device and carries all other components. The adjustable foot supports (110) are installed at the four corners of the base. The raw material storage device (120) is located on one side above the base (100) and is used to store nanomaterials required for spraying. The device is connected to the raw material pre-mixing device (130) through a pipeline. The raw material pre-mixing device (130) is located on one side of the raw material storage device (120) and is used to mix multiple raw materials in proportion. The mixed materials are sent to the high-pressure spraying device (140) through a conveying system. The high-pressure spraying device (140) is connected to the vacuum spraying chamber (150) through a pipeline. The workpiece temporary storage table (160) is located on one side of the base (100) and is close to the vacuum spraying chamber (150).

2. A nano coating vacuum spraying device according to claim 1, characterized in that: The vacuum spraying chamber (150) is provided with a workpiece access window.

3. A nano coating vacuum spraying device according to claim 1, characterized in that: The raw material storage device (120) has two separate storage devices A and B.

4. A nano coating spray material, characterized in that: It includes two components, A and B. When using, mix the components A and B thoroughly; The A component is made of the following raw materials by weight: Isocyanate MDI 100 parts Catalyst dibutyltin dilaurate 2-5 parts Plasticizer dioctyl phthalate 5-20 parts Filler: 10-20 parts of nano silicon dioxide Appropriate amount of additives; The preparation method is as follows: Premixing: put isocyanate, catalyst, plasticizer and most of the additives into a mixing container, turn on the agitator at 150-300rpm for preliminary mixing, the temperature is 60-80℃; Add filler: Add filler slowly while stirring to avoid agglomeration caused by adding too much at one time. Continue stirring until the filler is evenly dispersed in the mixture; Viscosity adjustment: The viscosity is adjusted to between 120 and 150 mPa·s by adding the remaining additives to obtain component A.

5. A nano coating spray material according to claim 4, characterized in that: Calculated by weight, the B component consists of the following raw materials: Reinforced resin bisphenol A epoxy resin 100 parts Impact modifier styrene butadiene rubber particles 5-10 parts Anti-scratch additive Alumina ceramic powder 3-9 parts Coupling agent γ-aminopropyltriethoxysilane 4-8 parts Leveling agent: 5-10 parts of silicone leveling agent The preparation method is as follows: Premixing: Premix styrene-butadiene rubber particles, alumina ceramic powder, γ-aminopropyl triethoxysilane and silicone leveling agent according to the formula ratio to ensure uniform distribution of each component; High-speed dispersion: Add the premixed materials into a high-speed disperser and mix them with bisphenol A epoxy resin at high speed. The process temperature is 100-120°C, the stirring speed is 400-600rpm, the reaction time is 1-2h, and the mixture is cooled to room temperature to obtain component B.

6. The nano coating spray material according to claim 4, characterized in that: The mass ratio of components A and B is 1-3:

1.

7. Use of the nano coating spray material as claimed in claim 4 in preparing PCB board materials.

8. The use according to claim 7, characterized in that: The following steps are involved: S1 preparation stage: Check whether all parts of the device are intact, ensure that the base (100) is stable, and the adjustable footrest (110) has been adjusted to a suitable height according to actual needs; Check whether the nanomaterials in the raw material storage devices (120) A and B are sufficient, and confirm that the types of materials meet the spraying requirements; Prepare the workpiece to be sprayed and place it on the workpiece temporary storage table (160) to facilitate subsequent operations; S2 Raw material mixing stage: Open the outlet valves of the raw material storage device (120) A and B to allow the required nanomaterial to flow into the raw material premixing device (130) through the pipeline; According to the spraying formula, the mixing ratio in the raw material premixing device (130) is adjusted, and the mixing device is started to fully mix the various raw materials; After the mixing is completed, the mixing device is closed and the mixed material is ready to be transported to the high-pressure spraying device (140); S3 high pressure spraying preparation stage: Check whether all parts of the high-pressure spray device (140) are in normal working condition and ensure that the spray gun tip is clean and unblocked; Starting the conveying system of the high-pressure spraying device to convey the mixed nanomaterial from the raw material premixing device (130) to the hopper or storage tank of the high-pressure spraying device (140); S5 vacuum spraying stage: The workpiece to be sprayed is removed from the workpiece temporary storage table (160) and placed in a designated position in the vacuum spray chamber (150); the door of the vacuum spray chamber is closed, and the vacuum pump is started to extract the air in the spray chamber to achieve a desired vacuum degree; the high-pressure spray device (140) is started to spray the mixed nanomaterial evenly onto the surface of the workpiece through the spray gun head under high pressure; and the spray parameters, including the spray pressure and the spray distance, are adjusted according to the spray requirements and the characteristics of the workpiece; S6 spraying completion and post-processing stage: After spraying is completed, the high pressure spraying device (140) and the vacuum pump are turned off, the door of the vacuum spraying room is opened, and the sprayed workpiece is taken out.

9. The use according to claim 8, characterized in that: The spraying vacuum degree is 100-500 Pa; the spraying pressure is 1-5Mpa, the spraying distance is 3-6cm, and the spraying thickness is 5-50 microns.

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