Double-coating coating method for single-crystal guide wheel

Abstract

The invention discloses a single crystal guide wheel double-coating coating method, which belongs to the technical field of coating coating, and specifically comprises the following steps: S1, cleaning two ends of a guide wheel after the guide wheel is used; the guide wheel comprises a guide wheel body and an old coating which is coated on the guide wheel body for the first time; s2, the old coatings on the surfaces of the two ends of the guide wheel are turned and stripped to form a blank area with the width of 25-30 mm on the guide wheel body; s3, the blank areas turned at the two ends of the guide wheel body in the step S2 are subjected to surface treatment, and sand grain layers are arranged; s4, the old coating area is brushed with an adhesive and then coated with a coating to form a new coating, and secondary coating is completed; according to the method, the secondary coating is firmer in coating, can be recycled for a long time, is convenient and rapid, saves time and labor, and effectively reduces the cost.

Description

Technical Field

[0001] The invention relates to a coating coating method, in particular to a single crystal guide wheel double coating coating method, belonging to the technical field of coating coating. Background Art

[0002] Photovoltaics, or photovoltaic power generation system, is a power generation system that uses the photovoltaic effect of semiconductor materials to convert solar radiation energy into electrical energy. The energy of the photovoltaic power generation system comes from inexhaustible solar energy. It is a clean, safe and renewable energy source. The photovoltaic power generation process does not pollute the environment or damage the ecology. With the increasing global attention to renewable energy, the photovoltaic industry has developed rapidly and has broad market prospects.

[0003] The photovoltaic industry includes a slicing process, in which a slicer is used to cut monocrystalline silicon rods. The guide wheel is an important component of the slicer. The guide wheel consists of a guide wheel body and a coating attached to the guide wheel body. The coating will be worn away during use, so the guide wheel will be coated a second time. The reserved old coating is coated a second time to reduce the use of raw materials. However, the remaining old coating in the secondary coating process currently needs to be completely turned and then coated. The process is complicated, labor-intensive, and the coating is seriously wasted, increasing costs.

[0004] At present, patent CN115739569 discloses a secondary coating production method for electrical steel self-adhesive coating, which controls the temperature of the electrical steel strip whose self-adhesive coating has failed or has an insulating coating, and then applies the self-adhesive coating on the surface of the electrical steel strip. The process does not require the original coating to be processed, which reduces the workload and is more environmentally friendly. The bonding strength of the obtained electrical steel self-adhesive coating product can also be guaranteed. However, this method is not a secondary coating of the coating, but a coating of the self-adhesive layer, and this method is not suitable for guide wheels. If the original coating is not cleaned, the secondary coating will not be firmly bonded and will easily fall off, and this method cannot be recycled for a long time.

[0005] Patent CN113871094B discloses a method for coating a conductive coating of a circuit and a cable with a conductive coating. During coating, the surface of the cable is first decontaminated, and then an adhesive is coated. After drying, the coating is coated to form a dry shape. The adhesive is used for coating. When it is necessary to remove the conductive layer, only the corresponding solvent is needed to wipe the conductive layer. The present invention is not a secondary coating, and the use of the adhesive is for the convenience of subsequent removal of the conductive layer. It is not suitable for secondary coating of the guide wheel. If this coating method is used, the coating is easy to fall off during use.

[0006] Therefore, developing a double-coating coating method for a single crystal guide wheel that can overcome the above defects has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a double-coating method for a single crystal guide wheel, which makes the secondary coating more firm, can be recycled for a long time, is convenient and fast, saves time and effort, and effectively reduces costs.

[0008] In order to solve the above technical problems, the present invention provides a method for coating a single crystal guide wheel with double coatings, which specifically comprises the following steps: Step S1, clean both ends of the guide wheel after use; The guide wheel includes a guide wheel body and an old coating applied for the first time on the guide wheel body; Step S2, the old coatings on the surfaces of both ends of the guide wheel are respectively peeled off by turning to form a blank area with a width of 25-30 mm on the guide wheel body; Step S3, performing surface treatment on the blank areas machined at both ends of the guide wheel body in step S2 to form a sand layer; Step S4, brushing the adhesive on the old coating area and then applying the coating again to form a new coating to complete the secondary coating.

[0009] The technical solution further defined in the present invention is: Furthermore, in the aforementioned single crystal guide wheel double coating method, the cleaning in step S1 is to use a steel wool and clean water to clean both ends of the guide wheel.

[0010] Technical effect: the guide wheel will accumulate some silicon mud when in use, which cannot be washed away by simple flushing. Use a steel wool ball to assist in cleaning it better, which is convenient for subsequent secondary coating.

[0011] In the above-mentioned single crystal guide wheel double coating method, the guide wheel body in step S1 is a guide wheel steel body.

[0012] In the above-mentioned double-coating method for the single crystal guide wheel, the surface treatment in step S3 is to use a sand blasting machine to spray sand on the turned area to form a sand layer, and then use alcohol to clean the sand layer after sand blasting.

[0013] Technical effect: the present invention adopts a sandblasting machine to sandblast the area after turning, which facilitates the bonding of the subsequent bonding layer and the secondary coating. After spraying, it is cleaned with alcohol to reduce impurities and pollutants, improve the bonding of the adhesive, and improve the firmness of the bonding.

[0014] In the above-mentioned single crystal guide wheel double coating method, the adhesive in step S4 is metal adhesive 422 glue.

[0015] In the above-mentioned double-coating method for the single crystal guide wheel, in step S4, the adhesive is brushed on and then heated at 100° C. for 4 hours, and then coated a second time.

[0016] Technical effect: the coating material is liquid and needs high temperature, and the steel body also needs high temperature, which makes it easier to integrate.

[0017] The beneficial effects of the present invention are: The present invention does not completely cut off the old coating, and directly covers it with a secondary coating, thereby reducing the use of raw materials and reducing costs. At the same time, the coating is continuously thickened and accumulated, thereby reducing the number of coatings. The present invention cuts off both ends of the old coating, performs surface treatment, and then coats an adhesive, and finally coats it a second time. The two ends have good adhesion and are more firm, and the coating can be effectively prevented from falling off.

[0018] The present invention first applies a layer of adhesive before the secondary coating, so that the coating is more stable, effectively avoiding the coating from falling off, and saving the purchase cost of the coating raw materials.

[0019] The present invention performs sandblasting on the turned part before applying the adhesive, the main purpose of which is to clean the rust, dirt and other impurities on the metal surface, and at the same time increase the surface roughness, improve the adhesion of the coating, and improve the firmness.

[0020] The guide wheel steel body is generally less than 150mm long, and a single-sided 10mm coating layer is provided on the top of the steel body. Each grooving reduces 2-3mm. A single set of guide wheels needs to be coated twice after being used for 5 times. Currently, the remaining coating is all turned and then coated for the second time during the secondary coating process, which causes serious waste and complicated processes. The present invention does not require all the old coating on the single crystal guide wheel to be turned, but only needs to turn the two ends, then spray sand, and then apply adhesive for the final secondary coating. The old coating is perfectly wrapped while the viscosity at both ends is high and the coating will not fall off during use. The design is reasonable and easy to use. The guide wheel can be recycled for a long time during the secondary coating process through this method, which is convenient and fast, saves time and effort, and has high efficiency and can reduce the cost of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a guide wheel coated with an old coating in a double-coating coating method for a single crystal guide wheel according to an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a guide wheel in which a blank area is turned in a double-coating coating method for a single crystal guide wheel according to an embodiment of the present invention; Figure 3 It is a schematic structural diagram of a guide wheel in which a sand layer is provided in a blank area in a double-coating method for a single crystal guide wheel according to an embodiment of the present invention; Figure 4 It is a schematic structural diagram of a guide wheel after secondary coating in a double-coating coating method for a single crystal guide wheel according to an embodiment of the present invention; In the figure: 1- guide wheel body, 2- old coating, 3- blank area, 4- sand layer. DETAILED DESCRIPTION Example 1

[0022] The present embodiment provides a method for coating a single crystal guide wheel with a double coating, which specifically includes the following steps: Step S1, clean both ends of the guide wheel after use; See also Figure 1 The guide wheel includes a guide wheel body 1 with a length of 1040 mm and a diameter of 150 mm and an old coating 2 with a thickness of 10 mm applied to the guide wheel body 1 for the first time. The guide wheel body is a guide wheel steel body, and 2 mm needs to be turned each time it is used. A single set of guide wheels needs to be coated twice after being used for 5 times; Cleaning is to use steel wool and clean water to clean both ends of the guide wheel to remove some silicon mud attachments, so as to facilitate the subsequent secondary coating; Step S2: The old coating 2 on the surfaces of both ends of the guide wheel is removed by turning to form a blank area 3 with a width of 25 mm on the guide wheel body. Figure 2 ; Step S3: Use a sand blasting machine to spray sand on the blank areas 3 that have been machined at both ends of the guide wheel body 1 in step S2 to form a sand layer 4. Figure 3 , Use alcohol to clean the sand layer after sandblasting; Step S4: Apply 422 glue to the old coating area, heat it at 100°C for 4 hours, and then apply the existing material as needed to form a new coating to complete the secondary coating. Figure 4 After the second coating, the diameter of the guide wheel is 170.5-172.5mm. After the second coating, the diameter is turned to 170.5mm and then continue to be grooved for use.

[0023] The present invention is easy to use, saves time and effort, increases the coating life of the guide wheel, enhances the stability of the guide wheel during use, and reduces the use of raw materials. In addition to the above embodiments, the present invention can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A method for coating a single crystal guide wheel with double coating, characterized in that: The specific steps include: Step S1, clean both ends of the guide wheel after use; The guide wheel comprises a guide wheel body (1) and an old coating (2) coated on the guide wheel body (1) for the first time; Step S2, the old coatings (2) on the surfaces of both ends of the guide wheel are respectively peeled off by turning to form a blank area (3) with a width of 25-30 mm on the guide wheel body; Step S3, performing surface treatment on the blank areas (3) machined at both ends of the guide wheel body (1) in step S2 to form a sand layer (4); Step S4, brushing the adhesive on the old coating area and then applying the coating again to form a new coating to complete the secondary coating.

2. The method for coating a single crystal guide wheel with double coating according to claim 1, characterized in that: The cleaning in step S1 is to use a steel wool and clean water to clean both ends of the guide wheel.

3. The double-coating coating method for a single crystal guide wheel according to claim 1, characterized in that: The guide wheel body in step S1 is a guide wheel steel body.

4. The method for coating a single crystal guide wheel with double coating according to claim 1, characterized in that: The surface treatment in step S3 is to use a sand blasting machine to spray sand on the turned area to form a sand layer, and then use alcohol to clean the sand layer after sand blasting.

5. The method for coating a single crystal guide wheel with double coating according to claim 1, characterized in that: The adhesive in step S4 is metal adhesive 422 glue.

6. The method for coating a single crystal guide wheel with double coating according to claim 1, characterized in that: In step S4, the adhesive is applied by brush and then heated at 100° C. for 4 hours, and then coated a second time.

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