Water-based paint cold spraying process and zipper hardware

Abstract

The invention provides a water-based paint cold spraying process and zipper hardware, and the process comprises the following steps: dilution: diluting water-based paint with a 50% ethanol aqueous solution to prepare a water-based paint; feeding is conducted, specifically, the workpiece is fed to a spherical appliance; cooling: feeding the spherical appliance and the workpiece into a cooling chamber, and cooling the workpiece to 25-30 DEG C; spraying: feeding the spherical appliance and the cooled workpiece into a spraying chamber, controlling the spherical appliance to drive the workpiece to rotate, and atomizing and spraying the water-based paint onto the workpiece through a spray gun; preheating: feeding the spherical appliance and the sprayed workpiece into a preheating chamber, and preheating the workpiece; drying: feeding the spherical appliance and the preheated workpiece into a drying chamber, and drying the workpiece; the steps from cooling to drying are circularly executed until the set number of times is reached; and discharging: discharging the workpiece from the spherical appliance. The water-based paint spraying device has the advantages that uniform atomization of water-based paint during construction can be guaranteed, sagging on the surface of a workpiece can be prevented, and the quality of the workpiece is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware production, and particularly to an aqueous paint cold spraying process and a zipper hardware

Background Art

[0002] Currently, the painting process of small hardware (such as a hardware pull head) usually realizes production by rolling and spraying with an oil-based paint in a spherical appliance. As is well known, oil-based paints have a greater impact on the environment. With the continuous improvement of people's environmental protection awareness, it is urgent to develop an aqueous paint with a lower impact on the environment.

[0003] In the actual development process, it is found that due to the characteristics of the aqueous paint itself and the characteristics of small hardware painting, there are great difficulties in actual atomization construction. Specifically: when constructing, if less solvent water is added, the viscosity of the aqueous paint is too high, and the paint cannot be atomized during atomized spraying, so that the uniform atomization effect cannot be achieved during rolling spraying; if more solvent water is added, the viscosity of the aqueous paint is too low. Although complete atomization can be achieved, after construction spraying, due to more water content, the surface of the coating is not easy to dry on the surface, and it is easy to form a sagging phenomenon, thus affecting the quality of the product. Therefore, there is an urgent need to provide an aqueous paint construction process that can not only ensure the uniform atomization of the aqueous paint but also prevent the formation of sagging on the surface of the workpiece.

Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an aqueous paint cold spraying process and a zipper hardware, which can not only ensure the uniform atomization of the aqueous paint during construction but also prevent the formation of sagging on the surface of the workpiece.

[0005] The present invention is implemented as follows:

[0006] In the first aspect, an aqueous paint cold spraying process is characterized by including the following steps:

[0007] Dilution: Dilute the aqueous paint with a 50% ethanol aqueous solution to prepare an aqueous coating for standby;

[0008] Feeding: Feed the workpiece after pretreatment into a spherical appliance;

[0009] Cooling: Send the spherical appliance and the workpiece into a cooling chamber together, and cool the workpiece in the cooling chamber to 25 - 30 °C;

[0010] Spraying: Send the spherical appliance and the cooled workpiece into a spraying chamber together, control the spherical appliance to drive the workpiece to rotate, and atomize and spray the aqueous coating onto the workpiece through a spray gun in the spraying chamber;

[0011] Preheating: Send the spherical appliance and the sprayed workpiece into a preheating chamber together, and preheat the workpiece in the preheating chamber;

[0012] Drying: The spherical device and the preheated workpiece are sent into the drying room, and the workpiece is dried in the drying room to solidify the water-based paint sprayed on the surface of the workpiece;

[0013] The steps of cooling to drying are performed cyclically until the set number of cycles is reached;

[0014] Discharging: Discharging the workpiece from the spherical container.

[0015] Furthermore, in the dilution step, the weight ratio of the water-based paint to the 50% ethanol aqueous solution is 1:0.5, and the water-based paint is water-based acrylic paint.

[0016] Furthermore, in the spraying step, the rotation speed of the spherical device is 35±5 rpm, the spray pressure of the spray gun is 0.3±0.1 MPa, the oil pump discharge volume is 35 cc / min, and the spraying time is 2 min.

[0017] Furthermore, in the spraying step, the spray gun used is an Iwata spray gun with a caliber of 1.2 mm.

[0018] Further, in the preheating step, the workpiece is preheated to 100±10°C.

[0019] Furthermore, in the drying step, the drying temperature of the drying chamber is 175±5°C.

[0020] Furthermore, in the drying step, the spherical tool and the preheated workpiece are sequentially sent into 7 drying chambers for drying, and the drying time in each drying chamber is 2 minutes.

[0021] Furthermore, the number of times is set to 7 to 10 times.

[0022] Furthermore, the steps from loading to discharging are all completed by an automatic coating machine, which includes a driving mechanism arranged in the middle for driving the spherical tool to switch workstations and 12 workstations arranged around the driving mechanism.

[0023] In a second aspect, a zipper hardware component is provided, wherein the surface of the zipper hardware component is sprayed with a water-based paint layer using the above-mentioned water-based paint cold spraying process.

[0024] By adopting the technical solution of the present invention, it has at least the following beneficial effects: Using an aqueous ethanol solution of 50% as a diluent to dilute the water-based paint, and using the water-based coating prepared by dilution to atomize and spray the workpiece. On the one hand, the water in the 50% aqueous ethanol solution can dissolve the water-based paint, and the ethanol (i.e., alcohol) in the 50% aqueous ethanol solution can play a diluting role, so that the water-based coating can be evenly atomized during rolling spraying; on the other hand, after atomization construction, the ethanol that plays a diluting role will quickly volatilize, so that the surface coating is uniform and there will be no sagging phenomenon, which can ensure the quality of the workpiece after construction; at the same time, the workpiece is cooled to 25-30 °C before spraying, which can ensure the leveling of the paint coating on the surface of the workpiece during subsequent spraying to obtain a smooth, flat and beautiful coating

Description of the Drawings

[0025] The present invention will be further described below with reference to the accompanying drawings in conjunction with embodiments

[0026] Figure 1 is a flowchart of a cold spraying process for a water-based paint according to the present invention

[0027] Figure 2 is a schematic diagram of the simple structure of an automatic painting machine used in a cold spraying process for a water-based paint according to the present invention

Detailed Embodiments

[0028] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art

[0029] It should be noted that certain terms are used in the description and claims to refer to specific components. Those skilled in the art should understand that technicians may use different terms to refer to the same component. The description and claims of this specification do not use the difference in terms as a way to distinguish components, but use the difference in the functions of components as a criterion for distinction. As used throughout the description and claims, the term "comprising" or "including" is an open-ended term and should be interpreted as "including but not limited to". The following description is a preferred embodiment for implementing the present invention, but the description is for the purpose of the general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the scope defined by the appended claims

[0030] Please refer to Figure 1 As shown, a cold spraying process for a water-based paint according to the present invention includes the following steps

[0031] Dilution: Dilute the waterborne paint with a 50% ethanol aqueous solution to prepare a waterborne coating for later use in atomizing and spraying the workpiece with the prepared waterborne coating. Compared with the existing spray painting process that dilutes with solvent water, the present invention dilutes the waterborne paint with a 50% ethanol aqueous solution, which can not only dissolve and dilute the waterborne paint well, but also make the ethanol (i.e., alcohol) used for dilution volatilize quickly after construction, thus avoiding the formation of sagging phenomenon.

[0032] Loading: Load the pre-treated workpiece into the spherical device. In the specific implementation of the present invention, for small hardware parts such as pull heads, usually 20 kg of workpieces are used as a spray painting unit.

[0033] Cooling: Send the spherical device and the workpiece together into the cooling chamber, and cool the workpiece to 25 - 30 °C in the cooling chamber. The purpose of cooling the workpiece to 25 - 30 °C is to ensure the leveling of the spray paint coating on the surface of the workpiece to obtain a smooth, flat and beautiful coating. In the existing spray painting process, since solvent water is used for dilution, in order to facilitate the surface drying of the water in the coating after construction, the workpiece generally needs to be heated to 100 °C before spraying. However, in the present invention, since the waterborne paint is diluted with a 50% ethanol aqueous solution and the ethanol can volatilize quickly after construction, the cold spray method is adopted in the present invention. Cold spray means that at room temperature (25 - 30 °C), the spherical device drives all the workpieces (usually including thousands of small hardware parts) to rotate, so that the coating levels on the surfaces of many workpieces, thereby obtaining a smooth, flat and beautiful coating.

[0034] Spraying: Send the spherical device and the cooled workpiece together into the spraying chamber, control the spherical device to drive the workpiece to rotate, and atomize and spray the waterborne coating onto the workpiece through a spray gun in the spraying chamber. That is, during the specific construction, it is necessary to control the spherical device to drive the workpiece to rotate while using the spray gun to atomize and spray the waterborne coating onto the workpiece to form a thin coating film on the surface of the workpiece.

[0035] Preheating: Send the spherical device and the sprayed workpiece together into the preheating chamber, and preheat the workpiece in the preheating chamber. By preheating the workpiece before drying, it can prevent the coating film on the surface of the workpiece from blistering.

[0036] Drying: Send the spherical device and the preheated workpiece together into the drying chamber, and dry the workpiece in the drying chamber to cure the waterborne coating sprayed on the surface of the workpiece.

[0037] Loop and execute the steps from cooling to drying until the set number of cycles is reached. Since during the actual construction process, each time of atomizing and spraying, the coating film can only cover a part of the surface of the workpiece. Therefore, to achieve the purpose of completely covering the surface of the workpiece with the coating film, multiple spraying constructions are required.

[0038] Discharging: Discharge the workpiece from the spherical appliance.

[0039] By adopting the above technical solution of the present invention, it has at least the following beneficial effects: Use an aqueous ethanol solution of 50% as a diluent to dilute the water-based paint, and use the water-based paint prepared by dilution to atomize and spray the workpiece. On the one hand, the water in the 50% aqueous ethanol solution can dissolve the water-based paint, and the ethanol (i.e., alcohol) in the 50% aqueous ethanol solution can play a diluting role, so that the water-based paint can be evenly atomized during rolling spraying; on the other hand, after atomization construction, the ethanol that plays a diluting role will quickly volatilize, so that the surface coating is uniform and no sagging phenomenon will occur, which can ensure the quality of the workpiece after construction; at the same time, cool the workpiece to 25-30 °C before spraying, which can ensure the leveling of the paint coating on the surface of the workpiece during subsequent spraying, so as to obtain a smooth, flat and beautiful coating.

[0040] As a specific embodiment of the present invention, in order to better achieve the effect of uniform atomization and ensure that no sagging phenomenon occurs after spraying, in the dilution step, the weight ratio of the water-based paint to the 50% aqueous ethanol solution is 1:0.5. At the same time, when the present invention is specifically implemented, the water-based paint uses water-based acrylic paint. Water-based acrylic paint is an acrylic resin paint with water as a solvent, mainly composed of water-based modified acrylic resin, pigment filler, flash rust inhibitor, water-based auxiliary agent and water. This kind of paint is not only environmentally friendly and non-toxic, but also has excellent weather resistance and anti-aging properties; since many workpieces will rub against each other and affect each other during the cold spraying process of the present invention, in order to meet the film coating performance, the present invention selects a high molecular self-crosslinking type acrylic resin as the paint to ensure that it can dry quickly after spraying.

[0041] In the present invention, in order to achieve a better spraying effect, in the spraying step, the rotation speed of the spherical appliance is 35±5 rpm, the spraying pressure of the spray gun is 0.3±0.1 MPa, the oil pump discharge volume is 35 cc / min, and the spraying time is 2 min. Of course, when the present invention is specifically implemented, the oil pump discharge volume and the spraying time can also be fine-tuned according to actual needs.

[0042] As a specific embodiment of the present invention, in order to achieve a better atomization effect, in the spraying step, the spray gun uses an Iwata spray gun with a nozzle diameter of 1.2 mm; of course, the present invention is not limited to this, and other spray guns can also be used during specific implementation.

[0043] In the present invention, in order to effectively prevent the film coating from foaming, in the preheating step, the workpiece is preheated to 100±10 °C.

[0044] In the present invention, in the drying step, the drying temperature of the drying chamber is 175±5°C.

[0045] In the present invention, in the drying step, the spherical device and the preheated workpiece are sequentially sent into 7 drying chambers for drying, and the drying time of each drying chamber is 2 minutes. Of course, in the specific implementation of the present invention, the drying time of each drying chamber can also be fine-tuned according to actual needs. The present invention adopts 7 drying chambers and sequentially sends the preheated workpiece into each drying chamber for drying. Through this multiple-cycle drying method, it can be ensured that the sprayed paint layer can be reliably solidified.

[0046] In the present invention, in order to ensure that the coating can completely cover the surface of the workpiece, the number of times is set to 7 to 10. Of course, the present invention is not limited to this, and the number of times can be adjusted according to the actual workpiece to be sprayed and the actual spraying situation during specific implementation.

[0047] In the present invention, the steps from loading to discharging are all completed by an automatic coating machine to reduce manual intervention and improve production efficiency; please refer to Figure 2 As shown, the automatic coating machine includes a driving mechanism arranged in the middle for driving the spherical tool to switch the workstations and 12 workstations arranged around the driving mechanism, wherein the driving mechanism can adopt a disc driving mechanism, and the 12 workstations are sequentially arranged with an automatic loader, a cooling chamber, a spray (i.e., paint spraying) chamber, a preheating chamber, a drying chamber 1, a drying chamber 2, a drying chamber 3, a drying chamber 4, a drying chamber 5, a drying chamber 6, a drying chamber 7 and an automatic discharger. When working, the spherical tool is driven by the driving mechanism to drive the workpiece to enter each workstation in turn, so as to realize the fully automatic construction of the entire cold spraying process and improve production efficiency.

[0048] The present invention also provides a zipper hardware, the surface of which is sprayed with a water-based paint layer by using the above-mentioned water-based paint cold spraying process.

[0049] The present invention is further described below through some specific embodiments:

[0050] Example 1

[0051] A water-based paint cold spraying process comprises the following steps:

[0052] Dilution: diluting the water-based acrylic paint with a 50% ethanol aqueous solution, the weight ratio of the water-based acrylic paint to the 50% ethanol aqueous solution is 1:0.5, and preparing a water-based paint for standby use;

[0053] Loading: Load the pre-treated zipper hardware into the spherical device;

[0054] Cooling: Feed the spherical device and the zipper hardware into the cooling chamber together, and cool the zipper hardware to 25°C in the cooling chamber;

[0055] Spraying: Feed the spherical device and the cooled zipper hardware into the spraying chamber together, control the spherical device to drive the zipper hardware to rotate, the rotation speed of the spherical device is 30 rpm, and atomize and spray the water-based paint onto the zipper hardware through an Iwata spray gun with a nozzle diameter of 1.2 mm in the spraying chamber. Set the spraying pressure of the Iwata spray gun to 0.2 MPa, the pump discharge volume to 35 cc / min, and the spraying time to 2 min;

[0056] Preheating: Feed the spherical device and the sprayed zipper hardware into the preheating chamber together, and preheat the zipper hardware in the preheating chamber to make the zipper hardware reach 90°C;

[0057] Drying: Feed the spherical device and the preheated zipper hardware into the drying chamber together, and dry the zipper hardware successively through 7 drying chambers. Set the drying temperature to 170°C, and the drying time of each drying chamber to 2 min to cure the water-based paint sprayed on the surface of the zipper hardware;

[0058] Repeat the steps of cooling to drying 7 times;

[0059] Discharging: Discharge the zipper hardware from the spherical device.

[0060] The zipper hardware obtained by the construction of Example 1 of the present invention is qualified after the washing test according to the ISO 6330-2021 international finished garment washing test standard.

[0061] Example 2

[0062] A water-based paint cold spraying process includes the following steps:

[0063] Dilution: Dilute the water-based acrylic paint with a 50% ethanol aqueous solution. The weight ratio of the water-based acrylic paint to the 50% ethanol aqueous solution is 1:0.5 to prepare the water-based paint for standby;

[0064] Loading: Load the pre-treated zipper hardware into the spherical device;

[0065] Cooling: Feed the spherical device and the zipper hardware into the cooling chamber together, and cool the zipper hardware to 28°C in the cooling chamber;

[0066] Spraying: Feed the spherical device and the cooled zipper hardware into the spraying chamber. Control the spherical device to drive the zipper hardware to rotate. The rotation speed of the spherical device is 35 rpm. In the spraying chamber, atomize and spray the water-based paint onto the zipper hardware through an Iwata spray gun with a nozzle diameter of 1.2 mm. Set the spray pressure of the Iwata spray gun to 0.3 MPa, the oil pump discharge volume to 35 cc / min, and the spraying time to 2 min;

[0067] Preheating: Feed the spherical device and the sprayed zipper hardware into the preheating chamber, and preheat the zipper hardware in the preheating chamber to make the zipper hardware reach 100 °C;

[0068] Drying: Feed the spherical device and the preheated zipper hardware into the drying chamber, and dry the zipper hardware successively through 7 drying chambers. Set the drying temperature to 175 °C, and the drying time for each drying chamber to 2 min, so that the water-based paint sprayed on the surface of the zipper hardware is cured;

[0069] Repeat the steps of cooling to drying 9 times;

[0070] Discharging: Discharge the zipper hardware from the spherical device.

[0071] The zipper hardware obtained by the construction of Example 2 of the present invention passed the final inspection after being tested by washing according to the ISO 6330-2021 international finished garment washing test standard.

[0072] Example 3

[0073] A water-based paint cold spraying process includes the following steps:

[0074] Dilution: Dilute the water-based acrylic paint with a 50% ethanol aqueous solution. The weight ratio of the water-based acrylic paint to the 50% ethanol aqueous solution is 1:0.5 to prepare the water-based paint for standby;

[0075] Loading: Load the pre-treated zipper hardware into the spherical device;

[0076] Cooling: Feed the spherical device and the zipper hardware into the cooling chamber, and cool the zipper hardware to 30 °C in the cooling chamber;

[0077] Spraying: Feed the spherical device and the cooled zipper hardware into the spraying chamber. Control the spherical device to drive the zipper hardware to rotate. The rotation speed of the spherical device is 40 rpm. In the spraying chamber, atomize and spray the water-based paint onto the zipper hardware through an Iwata spray gun with a nozzle diameter of 1.2 mm. Set the spray pressure of the Iwata spray gun to 0.4 MPa, the oil pump discharge volume to 35 cc / min, and the spraying time to 2 min;

[0078] Preheating: Feed the spherical appliance and the sprayed zipper hardware into the preheating chamber, and preheat the zipper hardware in the preheating chamber to make the zipper hardware reach 110°C;

[0079] Drying: Feed the spherical appliance and the preheated zipper hardware into the drying chamber, and sequentially dry the zipper hardware through 7 drying chambers. Set the drying temperature at 180°C and the drying time for each drying chamber at 2 min to cure the water-based coating sprayed on the surface of the zipper hardware;

[0080] Repeat the steps of cooling to drying 10 times;

[0081] Discharging: Discharge the zipper hardware from the spherical appliance.

[0082] For the zipper hardware obtained by the construction of Embodiment 3 of the present invention, after the washing test is carried out according to the ISO 6330-2021 international finished garment washing test standard, the final test result is qualified.

[0083] Although the specific implementation manners of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope protected by the claims of the present invention.

Claims

1. An aqueous paint cold spraying process, characterized in that, The steps include: Dilution: dilute the water-based paint with 50% ethanol aqueous solution to prepare a water-based paint for use; Loading: Load the pre-treated workpiece into the spherical device; Cooling: The spherical tool and the workpiece are sent to the cooling chamber together, and the workpiece is cooled to 25-30°C in the cooling chamber; Spraying: The spherical device and the cooled workpiece are sent into the spray chamber together, the spherical device is controlled to drive the workpiece to rotate, and the water-based paint is atomized and sprayed onto the workpiece through a spray gun in the spray chamber; Preheating: The spherical tool and the workpiece after spraying are sent into the preheating chamber, and the workpiece is preheated in the preheating chamber; Drying: The spherical device and the preheated workpiece are sent into the drying room, and the workpiece is dried in the drying room to solidify the water-based paint sprayed on the surface of the workpiece; The steps of cooling to drying are performed cyclically until the set number of cycles is reached; Discharging: Discharging the workpiece from the spherical container.

2. The waterborne paint cold spraying process according to claim 1, characterized in that: In the dilution step, the weight ratio of the water-based paint to the 50% ethanol aqueous solution is 1:0.5, and the water-based paint is water-based acrylic paint.

3. The waterborne paint cold spraying process according to claim 1, characterized in that: In the spraying step, the rotation speed of the spherical device is 35±5 rpm, the spray pressure of the spray gun is 0.3±0.1 MPa, the oil pump discharge volume is 35 cc / min, and the spraying time is 2 min.

4. The water-based paint cold spraying process according to claim 1, characterized in that: In the spraying step, an Iwata spray gun with a caliber of 1.2 mm was used as the spray gun.

5. The waterborne paint cold spraying process according to claim 1, wherein: In the preheating step, the workpiece is preheated to 100±10°C.

6. The waterborne paint cold spraying process according to claim 1, characterized in that: In the drying step, the drying temperature of the drying chamber is 175±5°C.

7. The waterborne paint cold spraying process according to claim 1, characterized in that: In the drying step, the spherical tools and the preheated workpieces are sequentially sent into seven drying chambers for drying, and the drying time in each drying chamber is 2 minutes.

8. The water-based paint cold spraying process according to claim 1, characterized in that: The setting number is 7 to 10 times.

9. The waterborne paint cold spraying process according to claim 1, characterized in that: The steps from loading to discharging are all completed by an automatic coating machine, which includes a driving mechanism arranged in the middle for driving the spherical tool to switch workstations and 12 workstations arranged around the driving mechanism.

10. A zipper hardware, characterized in that: The surface of the zipper hardware is sprayed with a water-based paint layer using the water-based paint cold spraying process as described in any one of claims 1 to 9.

Images