A flowability detection device for vacuum coating primer

Abstract

This utility model relates to a flowability testing device for vacuum-coated primers. It includes a housing containing a constant temperature system, an operating chamber, and an observation window. A base is located at the bottom of the operating chamber, and a paint tray is fixedly attached to the upper side of the base. A material trough is formed within the paint tray, and two equally sized drain holes are located at the bottom of the trough. Two Coating Cups are fixedly attached to the bottom of the paint tray. A groove is also provided on one side of the bottom of the material trough, and a drain pipe is connected to the bottom of the groove. A flip-up plate is rotatably connected to the back plate of the operating chamber, located below the paint tray. A sealing strip is provided on the upper surface of the distal end of the flip-up plate. A limit switch is also provided on the back plate of the operating chamber. The actuating rod of the limit switch abuts against the bottom surface of the flip-up plate. When the actuating rod of the limit switch extends, the flip-up plate flips upwards simultaneously, so that the sealing strip simultaneously seals against the outlets of the two Coating Cups. This utility model results in smaller viscosity testing errors and higher testing efficiency.

Description

Technical Field

[0001] This utility model relates to a viscosity testing device, and more particularly to a flowability testing device for vacuum coating primer. Background Technology

[0002] Vacuum coating primer is a key pretreatment material in the vacuum coating process, mainly used for surface treatment of plastic substrates (such as ABS, PP, PC, etc.). It provides an ideal substrate for subsequent metal coating layers by sealing volatiles in the substrate, enhancing coating adhesion, and improving surface smoothness. The viscosity of the vacuum coating primer is an important parameter reflecting its physical properties; therefore, viscosity testing is required for each batch of vacuum coating primer during production. A common viscosity testing method is the Ford-4 viscosity measurement method, which requires a Ford-4 cup. A Ford-4 cup is a metal cup with a specific capacity and a small discharge hole at the bottom. The specific procedure for the Foremost viscosity measurement method (T4 method) is as follows: First, thoroughly clean the Foremost viscosity cup. Then, use gauze or a cotton swab dipped in the paint to be tested to wipe the inner wall and drain hole of the Foremost viscosity cup to ensure no residue remains. Next, adjust and install the Foremost viscosity cup to ensure it is completely level. Maintain the ambient temperature at 25±1℃. Then, slowly pour the well-stirred paint (without air bubbles) into the Foremost viscosity cup, simultaneously blocking the drain hole (usually with a finger). Fill the cup until the liquid level exceeds the rim. Then, level the surface with a scraper. Start timing from when the finger is removed and continue until the liquid flow is first interrupted. Record the time taken to obtain the experimental data. To avoid errors, the same paint sample needs to be measured twice, with a deviation value ≤3%. Take the average of the two measurements. If the deviation is too large, the measurement must be repeated.

[0003] It can be seen that existing viscosity testing methods rely too heavily on operator technique, which is not only prone to errors but also has relatively low testing efficiency. In particular, the method of blocking the discharge orifice with a finger is too cumbersome, and existing valves are also unsuitable for controlling the opening and closing of the discharge orifice. Therefore, a completely new viscosity testing device needs to be developed. Summary of the Invention

[0004] This invention provides a flowability testing device for vacuum-coated primers, solving the problems of easy errors and low testing efficiency in the viscosity testing process of existing technologies.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a flowability testing device for vacuum coating primer, including a Coating Cup 4, and further comprising: a housing, wherein the housing is provided with a constant temperature system, an operating chamber, and an openable observation window, through which the interior of the operating chamber can be observed; a base is provided at the bottom of the operating chamber, and a coating tray is fixedly fixed to the upper side of the base; a material trough is formed in the coating tray; the bottom of the material trough is provided with two equally sized drain holes that penetrate the coating tray; the surface near the upper opening of the drain holes is horizontal; two Coating Cup 4 are fixedly attached to the bottom of the coating tray; and the two Coating Cup 4 are fixedly attached to the bottom of the coating tray. The inner cavity of the No. 4 coating cup is directly opposite to the two aforementioned leakage holes. A groove is also provided at the bottom of one side of the material trough, and a drain pipe is connected to the bottom of the groove. A valve or plug is provided on the drain pipe. A flip plate is rotatably connected to the back plate of the operating cavity and located below the coating tray. A sealing strip is provided on the upper surface of the far end of the flip plate. A limit switch is also provided on the back plate of the operating cavity. The action of the limit switch can be controlled by a switch. The action rod of the limit switch abuts against the bottom surface of the flip plate. When the action rod of the limit switch extends, the flip plate can flip up synchronously, so that the sealing strip seals and fits against the outlet of the two No. 4 coating cups at the same time.

[0006] The detection method of this utility model is as follows: First, open the observation window, place the waste liquid box on the base, and thoroughly clean the inner walls of the two coating cups and the coating tray. Then, use gauze or cotton swabs dipped in the coating to be tested to wipe the inner walls of the two coating cups and the coating tray, including the leak holes and the discharge ports of the coating cups, to ensure that there are no other impurities remaining. Then, close the observation window and start the constant temperature system, preset the temperature to 25°C, and wait for a certain period of time until the internal temperature of the operating chamber is constant at 25±1°C. Then, control the action rod on the limit switch to extend, and the discharge ports of the two coating cups are simultaneously flipped. With the sealing strip on the rotating plate in place, open the observation window and pour the paint sample to be tested, which is bathed in water at 25°C, into the material trough on the paint tray until the paint completely fills the two leak holes and partially overflows. Then, use a scraper to scrape the excess paint from the two leak holes into the groove. Close the observation window, align the camera with the observation window, and then control the lever on the limit switch to retract. The rotating plate will tilt downwards due to gravity, and liquid will begin to leak from the outlet of the No. 4 paint cup. The camera will record the entire process until the continuous liquid flow is interrupted for the first time. At this point, the recording can be stopped, and the experimental data can be obtained by reviewing the recorded video. After the experiment, the paint tray, No. 4 paint cup, rotating plate, and any parts contaminated with paint need to be cleaned and wiped. Wastewater in the paint tray can be drained through the drain pipe.

[0007] Furthermore, an elastic element is connected between the flip plate and the back plate of the operating cavity, which can apply a downward flipping force to the flip plate in real time. Driven by the elastic force of the elastic element, when the actuating rod on the control limit switch retracts, the downward flipping speed of the flip plate will increase significantly, thereby reducing the amount of paint sprayed onto the flip plate.

[0008] Therefore, this utility model has the following characteristics compared with the prior art: 1. Compared with the existing measurement methods, this utility model can eliminate the steps of adjusting the posture and height of the coating cup and pressing the finger against the coating cup outlet, and can complete two measurements at once, which can significantly improve the detection efficiency and reduce the generation of errors; 2. At the same time, this utility model can realize the temperature setting internally, which is significantly more energy-efficient and effective than the existing laboratory overall temperature control. Attached Figure Description

[0009] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Appendix Figure 2 It is attached Figure 1 Enlarged view of part A;

[0011] Appendix Figure 3 This is a top view of the paint tray. Detailed Implementation

[0012] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0013] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0014] Example 1: See Figure 1 and Figure 2A flowability testing device for vacuum-coated primer includes a Coating Cup 10 and a housing 20. The housing contains a constant temperature system, an operating chamber 30, and an openable observation window 40. The observation window is made of glass and can be rotatably connected to the housing via a hinge. The interior of the operating chamber can be observed through the observation window. A base 21 is located at the bottom of the operating chamber. A stainless steel coating tray 50 is fixed to the back plate of the operating chamber on the upper side of the base. A material trough 51 is formed inside the coating tray. Two equally sized perforated holes 52 are located at the bottom of the material trough, penetrating the coating tray. The surface near the upper opening of the perforated holes is horizontal. Two Coating Cups are fixedly attached to the bottom of the coating tray, and the inner cavities of the two Coating Cups are... The bottom of one side of the material trough is also provided with a groove 53, which is directly opposite the two leakage holes. A drain pipe 54 is connected to the bottom of the groove, and a plug 55 is provided on the drain pipe. A flip plate 60 is rotatably connected to the back plate of the operating chamber and located below the paint tray. A sealing strip 61 is provided on the upper surface of the far end of the flip plate. A limit switch 70 is also provided on the back plate of the operating chamber. The limit switch 70 is provided with a telescopic actuating rod. A roller is provided at the end of the actuating rod. The action of the limit switch can be controlled by the switch. The roller on the limit switch rolls and abuts against the bottom surface of the flip plate. When the actuating rod of the limit switch extends, the flip plate can flip up synchronously, so that the sealing strip seals and adheres to the outlet of the two paint cups at the same time.

[0015] The detection method in this embodiment is as follows: First, open the observation window, place the waste liquid box 80 on the base, and thoroughly clean the inner walls of the two coating cups and the coating tray. Then, use gauze or cotton swabs dipped in the coating to be tested to wipe the inner walls of the two coating cups and the coating tray, including the leak holes and the outlet of the coating cup, to ensure that there are no other impurities remaining. Then, close the observation window and start the constant temperature system, preset the temperature to 25°C, and wait for a certain period of time until the internal temperature of the operating chamber is constant at 25±1°C. Then, control the action rod on the limit switch to extend, and the outlet of the two coating cups is simultaneously flipped. With the sealing strip on the rotating plate in place, open the observation window and pour the paint sample to be tested, which is bathed in water at 25°C, into the material trough on the paint tray until the paint completely fills the two leak holes and partially overflows. Then, use a scraper to scrape the excess paint from the two leak holes into the groove. Close the observation window, align the camera with the observation window, and then control the lever on the limit switch to retract. The rotating plate will tilt downwards due to gravity, and liquid will begin to leak from the outlet of the No. 4 paint cup. The camera will record the entire process until the continuous liquid flow is interrupted for the first time. At this point, the recording can be stopped, and the experimental data can be obtained by reviewing the recorded video. After the experiment, the paint tray, No. 4 paint cup, rotating plate, and any parts contaminated with paint need to be cleaned and wiped. Wastewater in the paint tray can be drained through the drain pipe.

[0016] Specifically, an elastic element, specifically a torsion spring, connects the flip plate and the back plate of the operating chamber, which applies a downward flipping force to the flip plate in real time. Driven by the elastic force of the elastic element, when the actuating lever on the control limit switch retracts, the downward flipping speed of the flip plate will increase significantly, thereby reducing the amount of paint sprayed onto the flip plate.

[0017] For details, see Figure 1 The rotation axis of the flipper is higher than the outlet of the 4-cup coating. This design allows the sealing strip on the flipper to move to a path that avoids paint dripping with minimal rotation.

[0018] See Figure 2 The upper end of the coating cup is provided with a mating flange 11, the upper surface of the mating flange is provided with an annular rib 12, the bottom surface of the coating tray is provided with an annular groove that corresponds to the annular rib, a sealing ring 13 is also sandwiched between the coating tray and the mating flange, the sealing ring is located inside the annular groove, and at least three screws connect the mating flange and the coating tray.

[0019] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A flowability testing device for vacuum coating primers, comprising a four-cup coating cup, characterized in that, It also includes: a housing, which contains a constant temperature system, an operating chamber, and an openable observation window through which the interior of the operating chamber can be observed. A base is located at the bottom of the operating chamber, and a paint tray is fixedly attached to the upper side of the base. A material trough is formed within the paint tray, and two equally sized drain holes penetrating the paint tray are located at the bottom of the material trough. The surface near the upper opening of the drain holes is horizontal. Two paint cups are fixedly attached to the bottom of the paint tray, with the inner cavities of the two paint cups directly opposite the two drain holes. A groove is also provided on one side of the bottom of the material trough, and a drain pipe is connected to the bottom of the groove. A flip plate is rotatably connected to the back plate of the operating chamber, located below the paint tray. A sealing strip is provided on the upper surface of the distal end of the flip plate. A limit switch is also provided on the back plate of the operating chamber. The actuating rod of the limit switch abuts against the bottom surface of the flip plate. When the actuating rod of the limit switch extends, the flip plate flips upwards simultaneously, so that the sealing strip seals against the outlets of the two paint cups.

2. The flowability testing equipment for vacuum-coated primers according to claim 1, characterized in that: An elastic element is connected between the flip plate and the back plate of the operating cavity, which can apply a downward flipping elastic force to the flip plate in real time.

3. The flowability testing equipment for vacuum-coated primers according to claim 2, characterized in that: The rotation axis of the flipper is higher than the discharge port of the 4-cup coating.

4. The flowability testing equipment for vacuum-coated primers according to claim 1, characterized in that: The upper end of the coating cup is provided with a mating flange, the upper surface of the mating flange is provided with an annular rib, the bottom surface of the coating tray is provided with an annular groove that corresponds to the annular rib, and a sealing ring is also sandwiched between the coating tray and the mating flange, the sealing ring being located inside the annular groove.

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