TW201803942A - Masking coating, method and device for removing the same capable of solving problems of high cost and unsatisfactory masking effect in existing masking coatings used during the surface treatment work - Google Patents

Abstract

Disclosed herein are a masking coating, a method and a device for removing the masking coating, the masking coating is applied to a surface treatment work and is composed of thermoplastic ink and paraffin wax, wherein the average particle diameter of the thermoplastic ink is 5 ~ 700 nm and a maximum particle size of 1000 nm or less, and the paraffin wax accounts for 1% to 80% by weight of the entire masking coating such that the masking coating is solid at room temperature and has a transition temperature in the range of 70-90 DEG C. In addition, the present invention also provides a method and a device for removing the masking coating, wherein a heated grease-based remover is dripped, in a natural trickling manner, to a to-be-processed component coated with the masking coating, and due to the effect of the grease-based remover, the masking coating is completely removed from the to-be-processed component.

Description

Masking paint and method and device for removing masking paint

The invention relates to a masking paint and a method and a device for removing the masking paint, in particular to a masking paint implemented with a composite material and a method capable of completely removing the masking paint.

With the development of science and technology, today's metal parts or electronic parts are gradually pursuing fineness and tinyness. As a result, even if the metal parts or electronic parts to be processed are manufactured, the manufacturing process tends to be fine and complicated. Among them, in terms of surface treatment operations, due to the miniaturization of the structure of the components to be processed, the original surface treatment operations such as electroplating and etching have become increasingly difficult, and the precision after fabrication has been increasingly pursued.

According to the current surface treatment operations commonly carried out in the industry, such as plating, etching, etc., to form microstructures or image structures on the component to be processed through the surface treatment operation, however, it is generally necessary to wait for the surface treatment before the surface treatment operation is performed. A masking action is performed on the processing component to distinguish between a masked area and an unmasked area, so that the surface treatment operation is performed only on the unmasked area. However, the masking liquid, masking tape, paraffin, or thermoplastic ink is generally used in the industry to implement the masking action. As for the masking liquid, the masking liquid is currently in a liquid state, and a curing process is required to make the masking liquid pass through. The liquid state is changed to the solid state, so that the production process of the surface treatment operation is increased. In addition, if the material properties of the masking liquid itself will limit the surface treatment operations that can be performed, further, when the masking liquid is organic and applied to electroplating, the characteristics of the masking liquid itself will be similar to those used in electroplating. The chemical liquid used produces a chemical reaction, which cannot reliably perform the shielding function, and the shielding liquid is limited by its own tension, and it is difficult to apply it to smaller parts to be processed. Furthermore, if the operator uses a masking tape to perform a masking operation, at the beginning of the masking operation, the masking tape needs to be cut to an appropriate size, and then the masking tape is adhered to the area to be masked of the component to be processed. However, because the masking tape is difficult to cut in a smaller area, it is generally difficult to apply the masking tape to smaller parts to be processed. In addition, there are now some people who use paraffin to perform masking operations, as disclosed in Japanese Patent Publication No. JP 2014-28357. However, the material characteristics of paraffin itself are quite sensitive to temperature changes, and slight temperature changes will cause paraffin to shrink. During the masking operation of paraffin, the coating needs to be heated before it can be coated, and then the mask must be formed after cooling. In this way, if the paraffin is used to mask the fine area, the paraffin will form a mask when it is just coated and cooled. The area will change, and shielding cannot be done reliably, and the masking paint made of paraffin alone cannot be used in electroplating. In addition, during the masking operation with paraffin alone, the paraffin will also be blocked in the nozzle of the coating device by the temperature change, so that the coating device cannot stably output the paraffin for coating. In addition, nowadays, some people use the thermoplastic ink to perform the masking operation. However, the price of the thermoplastic ink is generally too high, which leads to the increase of the development cost of the manufacturer, which is not conducive to the sales of the product by the manufacturer. The shielding coating cannot be applied to electroplating operations with an operating temperature of 70 ° C or higher, and the problem of incomplete dissolution and shielding occurs.

Furthermore, after the surface treatment operation, a process of removing the masking coating is generally performed, and the general industry usually implements it by ultrasonic peeling, cooling peeling or heating peeling. Among them, the description is made with ultrasonic stripping. When performing ultrasonic stripping, the components to be processed after surface treatment need to be placed in a reaction tank of an ultrasonic device, so that the ultrasonic device starts the reaction tank. The water inside is shaken, so that the water stored in the reaction tank forms a shock wave like an ultrasonic wave, and the shielding coating on the component to be processed is removed through the shock wave. However, because the structure of the component to be processed is not flat, the The shock waves received by each part of the component are different, and it is easy to cause the problem of incomplete peeling of the shielding paint. Moreover, ultrasonic stripping requires a longer reaction tank, which is not conducive to the application of a short production line. For example, the ultrasonic stripping work time is 5 minutes, and the conveying speed of the production line is per minute. Calculated from 6 to 8 meters, a workstation with ultrasonic stripping requires a reaction tank of 30 to 40 meters. In addition, the continuation of the cooling and peeling is described. Generally, the cooling and peeling is to provide a cooling liquid to rapidly cool the surface-treated component to be processed, so that the masking coating originally attached to the component to be processed is cooled and shrinks. Reduce the adhesion and allow the masking paint to peel off from the component to be processed. However, in the actual operation process, it is difficult to make the masking paint on the component to be processed momentarily lower than the freezing point, and the cooling liquid cannot be implemented with pure water. The reason is that once the pure water has low cooling Freezing occurs at freezing points. To prevent the freezing of pure water at freezing point, other antifreeze solutions must be mixed to make a mixed solution with a freezing point below freezing point. In this way, even if the process of using cold peeling is required to add an ice preservation process, the development cost of the mixed liquid will be passed on to the product, which is not conducive to market competition. In addition, after the cooling and peeling technology is implemented, the shielding coating cannot be completely separated from the component to be processed, and a residual object appears. For this reason, some manufacturers have forced the residual The masking paint is separated from the component to be processed, but this will easily cause damage to the fine structure on the component to be processed, thereby reducing the yield. Furthermore, the explanation is continued in the form of thermal peeling. The so-called thermal peeling is to heat the masking coating on the component to be processed through a heater or a hot air gun, so that the masking coating is melted from a solid to a liquid, and finally The masking paint melted into a liquid state is removed from the component to be processed with a wiping cloth or a wiping paper. However, the above method will use a large number of wiping cloths or wiping papers. During the wiping process, it is still limited by the appearance of the wiping cloths or wiping papers and cannot wipe the smaller structure of the component to be processed. In addition, there is another embodiment in which the masking coating is heated by using water vapor to transform the masking coating from a solid to a liquid. However, in actual operation, the temperature of the water vapor cannot be accurately determined. If the masking coating is implemented by water-insoluble oil, if the temperature of the water vapor cannot be significantly higher than the transition temperature of the masking coating, that is, It is possible that the masking coating will only be converted from a solid state to a paste state, and the masking coating in this state will more difficultly remove it from the component to be processed. In addition, if the industry uses strong The provision of the water vapor by the wind pressure to the component to be processed may enhance the separation effect of the shielding coating and the component to be processed, but during the implementation process, the fine structure of the component to be processed may still be damaged.

The main purpose of the present invention is to solve the problems of high price or poor shielding effect of the shielding coatings used in the current surface treatment operations.

Another object of the present invention is to solve the problem that the conventional method for removing the masking coating cannot completely peel the masking coating from the component to be processed.

In order to achieve the above object, the present invention provides a masking paint for attaching to a surface of a component to be processed, so that the surface forms a masked area and an unmasked area, so that the component to be processed can be surface-treated. The operation is performed on the unshielded area. The masking paint is composed of a thermoplastic ink and a paraffin wax. The average diameter of the thermoplastic ink is 5 to 700 nm, and the maximum particle diameter is 1000 nm or less. The paraffin accounts for 1% to 80% of the total weight of the masking coating. The masking coating is a solid and insoluble in an organic solvent at room temperature, and the masking coating has a transition temperature. It is between 70-90 ° C, and changes from the solid state to a liquid state when the masking coating is heated to the transition temperature.

In one embodiment of the present invention, the shielding coating is a film at normal temperature.

In one embodiment of the present invention, the temperature of the shielding coating is lower than the transition temperature, that is, the transition state returns to the solid state.

In one embodiment of the present invention, the transition temperature is 80 ° C.

In an embodiment of the invention, the thermoplastic ink is at least composed of a resin, a polymer, and a pigment.

In an embodiment of the present invention, the thermoplastic ink accounts for 20% of the total weight of the masking coating, and the paraffin wax accounts for 80% of the total weight of the masking coating.

In one embodiment of the present invention, the thermoplastic ink accounts for 30% of the total weight of the masking coating, and the paraffin wax accounts for 70% of the total weight of the masking coating.

In addition to the above-mentioned masking paint, the present invention also provides a method for removing the masking paint. The method includes the following steps: Step 1. Provide the component to be processed, and the surface of the component to be processed is coated with the masking coating to form the The shaded area and the unshielded area; step two, providing a grease remover, heating the grease remover, and heating the grease remover from normal temperature to at least 70 ° C and higher than the transition state of the masking paint Temperature; step three, providing the oil-removing agent after heating to the component to be processed in a natural drip pattern, so that the masking coating is removed on the surface of the component to be processed by the effect of the oil-removing agent.

In an embodiment of the present invention, the third step further includes a sub-step of adjusting the placement state of the component to be processed and the drip trajectory of the grease remover in parallel.

In an embodiment of the present invention, after step 3, step 4 is further included: collecting the grease-based remover after dripping and the masking coating after the transition, and cooling the grease-based remover and the masking coating. , So that the grease-based remover can be separated from the masking coating.

In one embodiment of the present invention, the flash point of the grease-based remover is 40 ° C or higher, the auto-ignition temperature is 220 ° C, the viscosity is 2.42mPa · s at 20 ° C, and 0.82mPa · s at 80 ° C.

In an embodiment of the present invention, in the second step, the grease removing agent is heated to 120 ° C.

In addition, the present invention also provides a device for removing shielding paint. The device includes a support portion, a heating portion, and a supply portion. The supporting part is formed with a working area provided with the parts to be processed in which the shielding coating is placed, the warming part stores the grease removing agent and heats the grease removing agent, and the supplying part is connected The warming part is provided corresponding to the working area, so as to obtain the grease-removing agent from the warming part and drip the grease-removing agent on the component to be processed in the natural dripping form.

In an embodiment of the present invention, the supporting portion includes a conveying module and a plurality of racks driven by the conveying module and supporting the components to be processed respectively.

In an embodiment of the present invention, the heating unit includes a storage module storing the grease removing agent, and a pair of heating modules that heat the storage module in response to the storage module.

In an embodiment of the present invention, the storage module of the heating section is correspondingly disposed below the supply section, so that the grease-removing agent and the shielding coating after the action are stored in the storage module.

In an embodiment of the present invention, the supply unit includes an infusion module connected to the heating unit to obtain the grease-removing agent, and an infusion module connected to the infusion module and provided in the working area.

In one embodiment of the present invention, the infusion module includes a pressure pump and an infusion tube connected to the pressure pump.

Compared with the conventional technology, the disclosed technical solution of the present invention has the following advantages:

1. The masking coating of the present invention is composed of the thermoplastic ink and paraffin, and the paraffin accounts for 1% to 80% of the total weight of the masking coating. Thus, the masking coating of the present invention can be formed as a single thermoplastic resin. The masking effect implemented by the ink reduces the development cost of the masking coating at the same time, and solves the problems of high price or poor masking effect of the conventional masking coating.

2. In the present invention, a grease-based remover is used as the main medium for removing the masking paint, and the grease-based remover is moderately heated, and then drips on the components to be processed in a natural dripping pattern, so that the masking paint is affected by the The high-temperature action of the grease-based remover generates a transition state, so that the masking coating is completely peeled from the component to be processed.

The detailed description and technical contents of the present invention are described below with reference to the drawings:

The invention provides a masking coating. The masking coating is mainly used for a surface treatment operation. The so-called surface treatment operation may refer to an electroplating or an etching operation. The masking paint is composed of a thermoplastic ink and a paraffin wax, wherein the average diameter of the thermoplastic ink is 5 to 700 nm, and the maximum particle diameter is 1000 nm or less, and the paraffin accounts for the masking paint. The overall weight percentage is 1% to 80%. Furthermore, in order to ensure that the masking coating cannot be changed during the surface treatment operation to ensure the quality of the surface treatment operation, the masking coating according to the invention is at room temperature as follows: A solid and insoluble in an organic solvent, and the masking coating has a transition temperature, and the transition temperature is between 70-90 ° C, which is generated when the masking coating is heated or cooled to the transition temperature. The transition state, for example, assumes that the masking coating is in a solid state at normal temperature when it is not implemented. When the masking coating is heated and exceeds the transition temperature, it changes from a solid state to a liquid state. On the contrary, if the masking coating is in a When the temperature is lower than the transition temperature when the temperature is high, the shielding coating is converted from a liquid state to a solid state, so that the present invention can use this characteristic to apply to the surface treatment operation. Furthermore, the thermoplastic ink of the present invention may be a thermoplastic ink sold by Sable Black, or may be one selected from the group consisting of a thermoplastic resin or a thermoplastic polymer. Moreover, in an embodiment, the thermoplastic ink may be a resin, a polymer, and a pigment blended in proportion. The resin may be a compound such as a urethane or a diisocyanate, and The polymer may be a compound such as a polyvinyl chloride or a polyurethane urea-based crosslinked particle, and the pigment may be an azo dye, a metal dye, or a naphthol dye. On the other hand, the paraffin of the present invention is obtained as an alkane with a carbon number of 20 or more (the general formula is CnH2n + 2), and its melting point is about 88 ° C, and the oil content is 0.2% / mass. In one embodiment, the paraffin It is necessary to use paraffin sold by the Japan Wax Company. More specifically, in one embodiment of the present invention, the masking paint is made by mixing 20% thermoplastic ink and 80% paraffin wax, and the masking paint is applied on an object, as shown in FIG. 1. In this embodiment, the masking paint can reliably cover part of the structure of the object, but in order to further improve the coating effect of the masking paint, in another embodiment, the masking paint is made of 30% The thermoplastic ink is mixed with 70% paraffin. The coating effect of this embodiment is shown in Fig. 2. After comparing Fig. 1 and Fig. 2, it can be clearly known that the masking paint of Fig. 2 produces a better image resolution. It can be more specifically applied to the application of micro-fine surface treatment. According to this, the masking coating of the present invention must adjust the proportion of the thermoplastic ink and paraffin in the masking coating according to the implementation requirements to comply with the corresponding Requirements for surface treatment operations, such as the image resolution of the masking paint, or the transition temperature of the masking paint. According to the above, in one embodiment of the masking paint of the present invention, the transition temperature of the masking paint is 80 ° C.

As mentioned above, after the masking paint of the present invention is prepared, the masking material is presented as a solid at room temperature, but in the form of a film. The masking paint is insoluble in this state. Among the organic solvents, it is possible to prevent the shielding coating from interacting with the organic solvents (such as toluene, acetone, etc.) used in the surface treatment during the surface treatment. Referring to FIG. 3, it can be known from the foregoing that the masking coating material of the present invention can be applied to the surface treatment operation, and a surface 11 of a component 1 to be processed is coated on the surface 11 to form a masking area 111 on the surface 11. And an unshielded area 112. More specifically, the component 1 to be processed in the present invention may be a mechanical component or a component constituting an electronic device, and the component 1 to be processed may be made of a metal, a resin, or a plasticized material. Furthermore, at the beginning of the implementation of the surface treatment operation, the masked area 111 and the unshielded area 112 on the surface 11 need to be defined first, so that the surface treatment operation can only have an effect on the unshielded area 112. Subsequently, a coating device is further applied to the masking area 111 correspondingly, and during the coating process, the coating device heats the masking coating to increase the temperature of the masking coating and exceed the masking coating. The transition temperature enters the liquid state, and then the masking coating is applied on the to-be-processed component 1 according to the position of the masking area 111. After the coating is completed, the to-be-processed component 1 or The to-be-processed component 1 is cooled, so that the temperature of the masking coating is lower than the transition temperature, and is converted from a liquid state to a solid state, so that the masking coating forms the film on the to-be-processed component 1, as shown in FIG. 3. 2. In this way, the component 1 to be processed can perform subsequent surface treatment operations, so that the unshielded area 112 forms a plated image or a microstructure.

Please refer to FIG. 4 and FIG. 5. As mentioned above, after the surface processing operation is performed on the component 1 to be processed, a masking coating removing operation is performed to remove the masking coating from the component 1 to be processed. Accordingly, the present invention also provides a method for removing masking paint, and the method is implemented with a device 3 for removing masking paint during the implementation process. However, in order to specifically explain the method for removing the masking paint according to the present invention, the device 3 for removing the masking paint is described here first. In one embodiment, the device 3 for removing the masking paint includes a support portion 31 and a heating portion 32. And a supply portion 33, more specifically, the support portion 31 may be composed of a plurality of support members (such as iron pipes, aluminum extrusions), as shown in FIG. 4, in addition, the support portion 31 is also It can be implemented by a conveyor belt. The supporting portion 31 further forms a working area 311. The working area 311 referred to in the present invention refers to a space provided for the component 1 to be processed for removing the shielding coating. In addition, the heating unit 32 may be composed of a storage module 321 and a heating module 322. The storage module 321 provides a solvent for removing the masking paint and stores the solvent therein. The storage module 321 may be a liquid storage tank or a liquid storage barrel, and the heating module 322 is set corresponding to the storage module 321 to heat the storage module 321 after being started, and further, the heating The module 322 may partially or completely cover the storage module 321 to stably heat the storage module 321. Furthermore, the supply unit 33 of the present invention may be an infusion tube or other infusion operations. In the structure, one end of the supply part 33 is connected to the heating part 32, and the other end is provided corresponding to the working area 311 of the support part 31. To further explain, the supply part 33 of the present invention is connected to the storage module of the heating part 32 321 to obtain the solvent, and transport the solvent to the work area 311 of the support portion 31, so that the solvent performs the operation of removing the shielding coating on the component 1 to be processed placed in the work area 311.

As mentioned above, in the present invention, the masking coating can be specifically removed from the component to be processed, and further, a grease-based remover is used as a solvent for removing the masking coating. More specifically, the grease referred to in the present invention The oil-based remover can be implemented by using oils with low viscosity and high volatility, so that the oil-based remover can be easily washed away from the component 1 to be processed. In addition, in order to consider public safety during implementation, the grease remover of the present invention needs to have the characteristics of lower flash point and higher spontaneous combustion temperature. In one embodiment, the oil characteristics of the grease remover are a flash point of 40 ° C or higher, a spontaneous combustion temperature of 200 ° C, a viscosity of 2.42 mPa · s at 20 ° C, and 0.82 mPa · s at 80 ° C. Further, the grease-removing agent of the present invention is obtained as a lamp oil.

As mentioned above, the method for removing shielding paint according to the present invention includes the following steps:

Step one (41): provide the component 1 to be processed, and the surface 11 of the component 1 to be processed is coated with the masking paint to form the masked area 111 and the unmasked area 112;

Step two (42): providing the grease-removing agent, heating the grease-removing agent, and heating the grease-removing agent from normal temperature to at least 70 ° C and higher than the transition temperature of the masking coating;

Step three (43): providing the grease-removing agent after heating to the to-be-processed component 1 in a natural drip pattern, so that the masking coating is removed from the to-be-processed component by the action of the grease-removing agent. 1 of this surface 11.

In order to clearly show the implementation process of the grease-removing agent of the present invention in the method, the present invention herein designates the grease-removing agent as 5. At the beginning of the implementation of the present invention, the grease-based remover 5 can be stored in the storage module 321 of the heating unit 32 at room temperature. In the process of removing the shielding coating, the surface treatment operation will be completed. The to-be-processed component 1 is placed in the work area 311 (that is, step one 41), and thereafter, the heating section 32 of the apparatus 3 for removing masking paint is heated to the grease removing agent 5 to make the grease The class 5 remover 5 is heated from normal temperature to at least 70 ° C and is higher than the transition temperature of the masking coating (ie, step 2 42). In other words, the grease type remover 5 of the present invention needs to be warmed at least higher than the transition of the masking coating. State temperature, in one embodiment, the method of the present invention raises the grease remover 5 to 120 degrees, and in order to prevent the grease remover 5 from contacting with the air during the dripping process, heat exchange is caused, The temperature drop is not conducive to implementation. Therefore, the present invention further makes the temperature of the oil-based remover 5 output from the supply unit 33 greater than the transition temperature of the masking paint. Furthermore, the supply unit 33 of the masking paint removing device 3 obtains the warmed grease remover 5 from the storage module 321 of the warming unit 32 and supplies the grease remover 5 to the The working area 311 of the support portion 31 allows the grease-based remover 5 to drip the component 1 to be processed in the natural dripping pattern, so that the film 2 formed by the shielding coating is removed by the grease. The high temperature of the agent 5 rises to the transition temperature, and is converted from a solid to a liquid, and is removed on the component 1 to be processed with the flow of the grease-based remover 5. Thereafter, the component 1 to be processed needs to be simply cleaned to complete the operation. Moreover, the natural dripping pattern referred to in the present invention means that the grease-based remover 5 drips from the supplying portion 33 toward the supporting portion 31, and the dripping pattern is like raindrops. Further, assuming that the position of the heating part 32 is significantly higher than the support part 31, the grease removing agent 5 transported in the supply part 33 is subject to the difference between the heating part 32 and the support part 31, A hydraulic pressure is formed, and the grease-based remover 5 in the supply portion 33 is dripped toward the support portion 31 by the hydraulic pressure.

Carrying on the above, and referring to FIG. 6 and FIG. 7, the method of the present invention in an embodiment, the third step (43) includes adjusting the placement state of the to-be-processed component 1 and the grease removing agent The drip trajectory of 5 is a parallel sub-step (431). More specifically, in order to drip the grease remover 5 onto the component 1 to be processed, the grease remover 5 and the The contact area of the processing component 1 is adjusted in this embodiment, so that the placement state of the processing component 1 is further adjusted so that the drip trajectory of the processing component 1 and the grease removing agent 5 is parallel, As shown in FIG. 6, the drip trajectory is 51 as shown in FIG. 6. In this way, the grease removing agent 5 can be dripped along the surface 11 after dripping the component 1 to be processed. Flow, which can generate more contact area, greatly increase the contact opportunity of the film 2 and the grease-based remover 5, and then the shielding coating can be more completely removed from the component 1 to be processed. In addition, through the above-mentioned adjustment of the placement state, the splashing of the grease-based remover 5 during the dripping process can also be reduced, and the grease-based remover 5 and the shielding coating removed can flow down. No need to clean up with other tools. Furthermore, the present invention can also cause the component 1 to be processed to be tilted into the working area 311 to achieve similar effects.

According to the invention, after the masking paint is removed, the masking paint and the grease-based remover 5 can be recovered for the next operation. Please refer to FIG. 7 and FIG. 8. In this embodiment, the storage module 321 of the heating section 32 of the apparatus 3 for removing masking paint is disposed below the supply section 33. More specifically, the supply section 33 includes an infusion module 331 connected to the heating unit 32 to obtain the grease-removing agent 5, and a liquid supply module 332 connected to the infusion module 331 and provided in the working area 311. Further, the infusion module 331 includes a pressure pump 333 and an infusion tube 334 connected to the pressure pump 333. In this embodiment, the liquid supply module 332 of the supply portion 33 is disposed above the work area 311 of the support portion 31 to supply the grease removing agent 5 to the work area 311, and the pressure pump 333 applies pressure to the grease-removing agent 5 in the infusion tube 334, so that the grease-removing agent 5 can be pumped from the heating section 32 to the liquid supply module 332, and dripped from above the support section 31. This grease-based remover 5. On the other hand, the storage module 321 of the heating section 32 has an opening facing the working area 311 in this embodiment, and is disposed above the supporting portion 31 corresponding to the working area 311, so that, The grease removing agent 5 and the shielding coating after the action can be stored in the storage module 321. According to this, the method of the present invention according to this embodiment further includes a step four (44): collecting the grease-based remover 5 after dripping and the masking coating after the transition, and the grease-based remover 5 and the masking coating are cooled to separate the grease-based remover 5 from the masking coating. Further explanation, after the method of the present invention is implemented in the first step (41) to the third step (43), due to the placement state of the component 1 to be processed, the grease remover 5 is brought along while flowing. After leaving the masking paint, it flows toward the storage module 321 placed below the operation area 311 and is collected in the storage module 321, and the storage module 321 is completed when the entire removal operation is completed. The operation of the heating module 322 causes the storage module 321 to cool down, and causes the masking coating to change to the state of the film 2 again. At this time, since the density of the grease-based remover 5 and the film 2 are different, The layering phenomenon will occur in the storage module 321. In this way, the shielding coating and the grease remover 5 which are transformed into the film 2 can be sorted and recovered. Furthermore, the storage module 321 of the present invention may further have an isolation cavity (not shown in the figure), so that when the masking paint is removed by the present invention, the masking paint and the grease removing agent 5 can be obtained after the action. Temporarily stored in the isolation cavity to avoid the problem that the supply unit 33 is pumped by mistake and an abnormal operation occurs. In addition, in an embodiment of the present invention, the support portion 31 may further include a conveying module 312 and a plurality of frames 313 driven by the conveying module 312 and supporting the components 1 to be processed, respectively.

In summary, the present invention provides a masking paint and a method and a device for removing the masking paint, wherein the masking paint can be used for a surface treatment operation, which is composed of a thermoplastic ink and a paraffin wax. The average particle diameter of the thermoplastic ink is 5 to 700 nm, and the maximum particle diameter is 1000 nm or less, and the paraffin accounts for 1% to 80% of the total weight of the masking coating, so that the masking coating is at room temperature as It is a solid state and has a transition temperature between 70 ° C and 90 ° C. In addition, the present invention also provides a method and a device for removing the masking paint. A heated grease-removing agent drips onto a component to be processed coated with the masking paint in a natural dripping pattern. The masking coating is completely removed on the component to be processed by the action of the grease removing agent. In this way, the problems of high cost or poor shielding effect of conventional shielding coatings, and the problem that conventional shielding removal methods cannot completely remove the shielding coating from the components to be processed are solved.

The present invention has been described in detail above, but the above is only one of the preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited by this, that is, the equality made according to the scope of patent application of the present invention Changes and modifications should still be covered by the patent of the present invention.

1‧‧‧Parts to be processed
11‧‧‧ surface
111‧‧‧ sheltered area
112‧‧‧Uncovered area
2‧‧‧ film
3‧‧‧ Device for removing masking paint
31‧‧‧ support
311‧‧‧Working area
312‧‧‧conveying module
313‧‧‧frame
32‧‧‧Heating Department
321‧‧‧Storage Module
322‧‧‧Heating module
33‧‧‧Supply Department
331‧‧‧ infusion module
332‧‧‧liquid supply module
333‧‧‧Pressure Pump
334‧‧‧ Infusion tube
41, 42, 43, 431, 44‧‧‧ steps
5‧‧‧ Grease remover
51‧‧‧Drip trajectory

FIG. 1 is a schematic diagram of an embodiment of a shielding coating according to the present invention. FIG. 2 is a schematic diagram of another embodiment of a shielding coating according to the present invention. FIG. 3 is a schematic structural diagram of an embodiment of a component to be processed according to the present invention. FIG. 4 is a schematic implementation diagram (1) of an embodiment of the present invention. FIG. 5 is a flowchart of an embodiment of a method for removing masking paint according to the present invention. FIG. 6 is an implementation schematic diagram (2) of an embodiment of the present invention. FIG. 7 is a flowchart of another embodiment of a method for removing masking paint according to the present invention. FIG. 8 is a schematic structural diagram of another embodiment of a device for removing masking paint according to the present invention.

1‧‧‧Parts to be processed

11‧‧‧ surface

2‧‧‧ film

31‧‧‧ support

311‧‧‧Working area

32‧‧‧Heating Department

321‧‧‧Storage Module

322‧‧‧Heating module

33‧‧‧Supply Department

5‧‧‧ Grease remover

Claims (19)

A masking coating is used to adhere to the surface of a component to be processed, so that the surface forms a masked area and an unmasked area, so that the component to be processed can perform a work on the unmasked area by a surface treatment operation, and the masking The coating is characterized in that the masking coating is composed of a thermoplastic ink and a paraffin wax, and the average diameter of the thermoplastic ink is 5 to 700 nm, and the maximum particle diameter is 1000 nm or less. 1% to 80% of the total weight of the masking coating. The masking coating is a solid and insoluble in an organic solvent at room temperature, and the masking coating has a transition temperature between 70 ~ Between 90 ° C, and when the masking coating is heated to the transition temperature, the solid state transitions to a liquid state. The masking paint according to claim 1, wherein the masking paint is a film at normal temperature. The masking paint according to claim 1, wherein the temperature of the masking paint is lower than the transition temperature, that is, the transition state returns to the solid state. The masking coating according to 2 or 3, wherein the transition temperature is 80 ° C. The masking coating according to claim 1, wherein the thermoplastic ink is composed of at least a resin, a polymer, and a pigment. The masking paint according to claim 1, wherein the thermoplastic ink accounts for 20% of the total weight of the masking paint, and the paraffin wax accounts for 80% of the total weight of the masking paint. The masking paint according to claim 1, wherein the thermoplastic ink accounts for 30% of the total weight of the masking paint, and the paraffin wax accounts for 70% of the total weight of the masking paint. A method for removing masking paint, the method includes the following steps: step one, providing the component to be processed, and the surface of the component to be processed is coated with the masking coating to form the masked area and the unmasked area; step two, Providing a grease-based remover, heating the grease-based remover to raise the grease-based remover from normal temperature to at least 70 ° C and higher than the transition temperature of the masking coating; and step three, using a natural drip The type provides the grease-removing agent after heating to the component to be processed, so that the masking coating is removed on the surface of the component to be processed by the action of the grease-removing agent. The method for removing masking paint as described in claim 8, wherein the third step further includes a sub-step of adjusting the placement state of the component to be processed and the drip trajectory of the grease remover in parallel. The method for removing masking paint as described in claim 8 or 9, further comprising a step 4 after step 3: collecting the grease-removing agent after dripping and the masking paint after transition, and the grease The removing agent and the masking paint are cooled to separate the grease removing agent and the masking paint. The method for removing masking paint according to claim 8 or 9, wherein the flash point of the grease-based remover is 40 ° C or higher, the spontaneous combustion temperature is 220 ° C, the viscosity at 20 ° C is 2.42mPa • s, and at 80 ° C is 0.82mPa • s. The method for removing masking paint as described in claim 11, wherein the oil and fat removing agent is heated to 120 ° C. in the second step. The method for removing masking paint according to claim 8 or 9, wherein the oil-based grease removing agent is heated to 120 ° C in the second step. A device for removing masking paint for implementing the method for removing masking paint according to claims 8 to 13, the device comprising: a support part formed with a component to be processed provided with the masking paint placed therein; A working area; a heating part storing the grease removing agent and heating the grease removing agent; and a supplying part connected to the heating part and setting corresponding to the working area to obtain from the heating part The fat-removing agent drips the fat-removing agent onto the component to be processed in the natural dripping form. The device for removing shielding paint according to claim 14, wherein the supporting portion includes a conveying module and a plurality of racks driven by the conveying module and respectively supporting the components to be processed. The device for removing masking paint according to claim 14 or 15, wherein the warming part includes a storage module storing the grease removing agent, and a pair of heating modules corresponding to the storage module and heating the storage module. Wen module. The device for removing masking paint as described in claim 16, wherein the storage module of the heating part is correspondingly disposed below the supply part, so that the grease-based remover and the masking paint after the action are stored in the Storage module. The device for removing masking paint as described in claim 14, wherein the supply unit includes an infusion module connected to the heating unit to obtain the grease-removing agent, and an infusion module connected to the infusion module and provided in the working area. Liquid supply module. The device for removing masking paint according to claim 18, wherein the infusion module includes a pressure pump and an infusion tube connected to the pressure pump.