A device for detecting the tack-free time of a silicone sealant
By linking the elastic reset mechanism and the pressure sensor, the adhesion force of silicone sealant is monitored in real time, which solves the problems of human error and efficiency in the detection of silicone sealant surface drying time, and achieves high-precision and automated detection results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI XINGFA LINGZHI NEW MATERIAL CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-21
AI Technical Summary
Existing methods for detecting the surface drying time of silicone sealants rely on subjective judgment, which results in large human errors, poor repeatability, inability to accurately record data, and low operational efficiency.
An elastic reset mechanism and a pressure sensor are used to monitor changes in the adhesive force of the colloid in real time. Physical contact is converted into an electrical signal to trigger a timer, enabling objective judgment. Through mechanical and electronic linkage design, human error is eliminated and detection accuracy is improved.
It enables objective and accurate detection of the surface drying time of silicone sealant, eliminates human error, improves detection accuracy and efficiency, is suitable for batch testing, has low cost and scalability, and supports industry standardization.
Smart Images
Figure CN224535757U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealant production and testing technology, specifically to a device for detecting the surface drying time of silicone sealant. Background Technology
[0002] The surface drying time of silicone sealant is a crucial performance characteristic, reflecting the workability in practical applications and providing guidance for post-construction finishing. There are generally two methods for determining surface drying time: the film method and the finger-touch method. The film method, as specified in GB / T 13477.5-2002 Test Methods for Building Sealing Materials – Determination of Surface Drying Time, involves allowing the prepared specimen to stand under standard conditions for a certain period. Then, a polyethylene film is placed at the longitudinal half-section of the specimen surface, with a brass plate placed at the center of the film. After 30 seconds, the brass plate is removed, and the film is peeled off the specimen surface at a 90° angle within 15 seconds at a uniform speed. This process is repeated at appropriate intervals at other locations until no sample adheres to the polyethylene strip (polyethylene film). The time elapsed from specimen formation to the point where the sample no longer adheres to the polyethylene strip is recorded. The finger-touch method involves allowing the prepared specimen to stand under standard conditions for a certain period, then wiping the fingertips clean with anhydrous ethanol and gently touching three different locations on the specimen. Repeat the above operation at appropriate intervals until no sample adheres to the fingers, and record the time elapsed from the time the sample is formed until it no longer adheres to the fingers.
[0003] The above two methods have the following drawbacks:
[0004] 1. Traditional methods rely on subjective judgment, which leads to large human error and poor repeatability;
[0005] 2. It is impossible to accurately record the drying time (or curing time) data, making it difficult to meet the standardization requirements of R&D and quality control;
[0006] 3. Manual observation requires frequent checks, which is time-consuming and labor-intensive, and is not suitable for testing large batches of samples, resulting in low operational efficiency. Utility Model Content
[0007] To address the problems existing in the prior art, this utility model provides a device for detecting the surface drying time of silicone sealant. It uses an elastic reset mechanism and a pressure sensor at the end of the stylus head to monitor changes in the adhesive force of the sealant in real time, converting physical contact into an electrical signal to trigger a timer, thereby achieving an objective judgment of the surface drying time of the silicone sealant.
[0008] To achieve the above objectives, the present invention adopts the following technical solution.
[0009] A device for detecting the surface drying time of silicone sealant, comprising the following components:
[0010] The stylus module includes a stylus, an elastic reset mechanism, and a pressure sensor. The elastic reset mechanism is connected to the tail (or one end) of the stylus, and the pressure sensor is integrated into the head (or the other end) of the stylus.
[0011] A timing module, electrically connected to the pressure sensor, is used to trigger the start and stop of the timing module according to a preset trigger pressure condition of the pressure sensor;
[0012] An adjustment bracket (or adjustable bracket) includes a vertical column, a horizontal base plate, and a cross plate, used to adjust the position of the stylus module; the vertical column is provided with a height adjustment knob for controlling the raising and lowering of the stylus module;
[0013] The sample platform, fixed on the horizontal substrate, is used to place the sample substrate coated with silicone sealant.
[0014] Optionally, the elastic reset mechanism includes a spring component, through which the initial contact pressure between the probe and the silicone sealant is preset. Further, the spring component is a spring.
[0015] Optionally, the stylus is vertically mounted at the end of the elastic reset mechanism to provide a constant rebound force.
[0016] Optionally, the elastic coefficient of the elastic reset mechanism is 0.5 to 2 N / mm.
[0017] Optionally, the timing module includes a display screen and a trigger circuit, wherein the trigger circuit is configured to automatically stop timing when the pressure sensor detects that the pressure value has dropped to 10% to 20% of the initial contact pressure.
[0018] Optionally, the preset trigger pressure condition of the timing module is "stop timing when the pressure value drops to ≤0.1N".
[0019] Optionally, the pressure sensor is embedded at the tip of the stylus to detect the adhesive force of the colloid in real time. Further, the sensitivity range of the pressure sensor is 0.1–1 N (e.g., 0.5 N or 0.8 N).
[0020] Optionally, the diameter of the stylus is 1 to 2 mm (e.g., 1.5 mm).
[0021] Optionally, the tip of the stylus is a smooth, rounded end.
[0022] Optionally, the tip of the stylus is made of PTFE (polytetrafluoroethylene) or coated with a PTFE non-stick coating.
[0023] Optionally, the timing module is connected to the pressure sensor via a wire. Further, the timing module is a digital timer.
[0024] Optionally, one end of the horizontal plate (54) is connected to the stylus module, and the other end is rotatably connected to the vertical column (51).
[0025] In this application, by rotating the horizontal plate (54) around the vertical column, the position of the horizontal plate (54) above the horizontal base plate (52) is changed with the vertical column (51) as the center. By adjusting the height of the height adjustment knob on the vertical column (51), the height of the horizontal bar (54) above the horizontal base plate (52) can be adjusted, thereby adjusting the height of the stylus module above the horizontal base plate (52).
[0026] Optionally, the height adjustment knob is a precision threaded knob; optionally, the adjustment accuracy of the height adjustment knob is ±0.1mm.
[0027] Optionally, rotating the height adjustment knob one full turn raises or lowers the stylus by a fixed value (the fixed value is adjusted according to actual needs, for example, 1 mm).
[0028] Optionally, the sample platform is fixed to the horizontal substrate by a magnetic base.
[0029] Optionally, the surface of the sample platform is printed with grid markings; the interval of the grid markings can be set as needed, for example, the interval of the grid markings is 1 mm.
[0030] Optionally, the stylus is a stainless steel needle.
[0031] Optionally, the vertical column is made of aluminum alloy.
[0032] Optionally, the sample substrate is made of tempered glass.
[0033] In this invention, the working principle of the silicone sealant surface drying time detection device is as follows: During the curing process of the silicone sealant, the stylus contacts the surface of the silicone sealant and generates different adhesion forces. During this process, the stylus is affected by both the adhesion force and the spring rebound force, which are reflected as different pressures on the pressure sensor. As the sealant gradually cures, the adhesion force on the surface of the stylus contacting the stylus decreases, and the influence of the spring rebound force on the stylus gradually becomes dominant. When the silicone sealant reaches the "surface dry" state, the stylus separates from the sealant due to the spring rebound force, and the signal of the pressure sensor changes abruptly, reaching the preset trigger condition for the pressure sensor to trigger the timing module to stop, thus triggering the timer to stop timing, thereby completing the detection of the silicone sealant surface drying time.
[0034] Optionally, the silicone sealant surface drying time detection device further includes a temperature control module for heating the silicone sealant to test its high-temperature curing, for example, heating it to 60°C to test high-temperature curing.
[0035] The method of using the silicone sealant surface drying time detection device in this invention is as follows:
[0036] (1) Sample preparation and initial contact pressure setting: Apply uncured silicone sealant evenly to the substrate and place it flat on the sample platform; adjust the height of the support so that the tip of the stylus lightly touches the surface of the sealant (the initial contact pressure is controlled by the spring preload).
[0037] (2) Start the timer: Press the "Start" button on the timer to enter the monitoring state;
[0038] (3) Curing detection: As the colloid gradually cures, the adhesion force on the contact surface of the stylus decreases; when the colloid reaches the "surface dry" state, the stylus separates from the colloid due to the spring rebound force, the pressure sensor signal changes abruptly, and the timer is triggered to stop timing;
[0039] (4) Data reading: The timer directly displays the curing time from start to surface drying (i.e., surface drying time, unit: seconds or minutes).
[0040] In this utility model, the above-mentioned technical features can be freely combined to form new technical solutions, provided that they do not conflict with each other.
[0041] Compared with the prior art, the above-mentioned technical solution provided by this utility model has the following beneficial technical effects:
[0042] (1) The silicone sealant surface drying time detection device of this utility model adopts a mechanical and electronic linkage detection design. Through the elastic reset mechanism and the pressure sensor at the end of the stylus, it monitors the change of adhesive adhesion force in real time, converts physical contact into an electrical signal to trigger the timer, realizes objective judgment and detection, and eliminates human error.
[0043] (2) The silicone sealant surface drying time detection device of this utility model has a highly adjustable integrated structure. It adopts a precision threaded knob adjustment bracket to adapt to colloid samples of different thicknesses (3-20mm) and ensures consistent contact pressure of the stylus.
[0044] (3) The silicone sealant surface drying time detection device of this utility model adopts intelligent triggering logic. It sets a pressure threshold (such as 10% to 20% of the initial contact pressure) as the surface drying completion signal to avoid false triggering (for example, pressure fluctuation caused by slight shrinkage of the sealant surface).
[0045] (4) The silicone sealant surface drying time detection device of this utility model can automatically record the curing time, which can improve the detection accuracy of silicone sealant surface drying time (accuracy up to 0.1 seconds), eliminate human judgment error, and the surface drying time detection repeatability error ≤1% (the error of traditional methods can reach 10% to 15%).
[0046] (5) The silicone sealant surface drying time detection device of this invention requires no manual intervention during a single test, making it suitable for continuous batch testing (e.g., testing 20 samples per hour), thus improving testing efficiency; furthermore...
[0047] (6) The silicone sealant surface drying time detection device of this utility model has a material cost of about 200 yuan and is suitable for use by small and medium-sized enterprises and construction sites; it has the characteristics of low cost and easy promotion.
[0048] (7) The silicone sealant surface drying time detection device of this utility model can be equipped with a temperature control module (such as heating to 60°C to test high temperature curing), or transmit data to a mobile terminal via Bluetooth to adapt to diverse needs; it has the characteristics of strong expandability;
[0049] (8) The silicone sealant surface drying time testing device of this utility model can provide quantitative data for the research and development and quality inspection of silicone sealant, and help the formulation of industry standards (such as the graded certification of surface drying time of building adhesives), and has the characteristics of standardization support.
[0050] (9) The silicone sealant surface drying time detection device of this utility model is easy to operate, requires no complicated training, and can complete the test with one button start. Attached Figure Description
[0051] Figure 1 This is a schematic diagram of the surface drying time detection device for silicone sealant according to the present invention.
[0052] Figure 2 This is a partial structural schematic diagram of a surface drying time detection device for silicone sealant according to the present invention.
[0053] Figure 3 This is a schematic diagram of the surface drying time detection device for silicone sealant during sample preparation in Embodiment 1 of this utility model.
[0054] Figure 4 This is a schematic diagram of the surface drying time detection device for silicone sealant during the sample curing test in Embodiment 1 of this utility model.
[0055] The attached figures are labeled as follows: 1-Stimulator, 2-Elastic reset mechanism, 3-Pressure sensor, 4-Timing module, 41-Display screen, 42-Trigger circuit, 5-Adjustment bracket, 51-Vertical column, 52-Horizontal base plate, 53-Height adjustment knob, 54-Horizontal plate, 6-Sample platform, 7-PTFE anti-stick coating. Detailed Implementation
[0056] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0057] Unless otherwise specified, the terminology used herein should be understood as having the meaning commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of any conflict, this specification shall prevail.
[0058] Example 1
[0059] A device for detecting the surface drying time of silicone sealant, such as Figure 1 As shown, it includes a stylus module, a timing module 4, an adjustment bracket 5, and a sample platform 6. Detailed descriptions are as follows.
[0060] The stylus module includes a stylus 1, a resilient reset mechanism 2, and a pressure sensor 3. The stylus 1 is made of stainless steel, has a diameter of 1.5 mm, and a smooth, rounded head with a PTFE (polytetrafluoroethylene) anti-stick coating 7 applied to the end. The stylus 1 is vertically mounted at the end of the resilient reset mechanism 2. The resilient reset mechanism 2 includes a spring with a spring constant of 1 N / mm, providing a constant rebound force. The spring presets the initial contact pressure between the stylus and the silicone sealant. The pressure sensor 3 is embedded at the end of the head of the stylus 1 to detect the adhesive force in real time, with a range of 0–1 N and an accuracy of ±0.05 N.
[0061] The timing module 4 is electrically connected to the pressure sensor 3 via a wire. The timing module 4 is started and stopped based on a preset trigger pressure condition set by the pressure sensor 3; specifically, as shown... Figure 2 As shown, the timing module 4 uses a digital timer (with an accuracy of 0.1 seconds), including a display screen 41 and a trigger circuit 42. The trigger circuit 42 is set to stop timing when the pressure sensor 3 detects that the pressure value drops to 0.1N (i.e., a preset trigger pressure condition).
[0062] The adjustment bracket 5 includes a vertical column 51, a horizontal base plate 52, and a crossbar 54, used to adjust the position of the stylus module. The vertical column 51 is made of aluminum alloy and has a height adjustment knob 53 with an M6 precision thread (1mm pitch) for controlling the raising and lowering of the stylus module. The crossbar 54 is also made of aluminum alloy, with one end connected to the stylus module and the other end rotatably connected to the vertical column 51. By rotating the crossbar 54 around the vertical column 51, the horizontal position of the crossbar 54 above the horizontal base plate 52 can be changed with the vertical column 51 as the center. By adjusting the height of the height adjustment knob 53 on the vertical column 51, the height of the crossbar 54 above the horizontal base plate 52 can be adjusted, thereby adjusting the height of the stylus module above the horizontal base plate 52.
[0063] The sample platform 6 includes a sample substrate made of 5mm thick tempered glass with 1mm interval grid markings printed on its surface. It is fixed to the horizontal substrate 52 by a magnetic base and is used to place the sample substrate coated with silicone sealant.
[0064] The method of using the surface drying time detection device for silicone sealant in this embodiment includes the following steps:
[0065] (1) Sample preparation
[0066] like Figure 3 As shown, silicone sealant is uniformly coated on a 50mm×50mm glass substrate (i.e., the sample substrate), with a sealant thickness of 3mm. The glass substrate coated with silicone sealant is then placed on the sample platform surface.
[0067] (2) Stylus positioning (or initial contact pressure setting)
[0068] like Figure 4 As shown, rotate the height adjustment knob to make the stylus lightly touch the surface of the colloid. Set the initial contact pressure to 0.5N and lock the knob to the fixed position.
[0069] (3) Start the test (or cure test)
[0070] Press the "Start" button on the timer, and the colloid will cure naturally in an environment of 25℃ / 50% relative humidity.
[0071] (4) Automatic determination (or data reading)
[0072] When the colloid is surface dry, the adhesion force drops below 0.1N, the stylus springs up under the action of the spring, the timer stops and displays the surface drying time (or curing time) as 120 minutes.
[0073] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A device for detecting the surface drying time of silicone sealant, characterized in that, Includes the following components: The stylus module includes a stylus (1), an elastic reset mechanism (2), and a pressure sensor (3). The elastic reset mechanism (2) is connected to the tail of the stylus (1), and the pressure sensor (3) is integrated into the head of the stylus (1). The elastic reset mechanism includes an elastic component, which presets the initial contact pressure between the stylus and the silicone sealant. The timing module (4) is electrically connected to the pressure sensor (3) and is used to trigger the start and stop of the timing module according to the trigger pressure condition of the pressure sensor (3); The adjustment bracket (5) includes a vertical column (51), a horizontal base plate (52) and a cross plate (54) for adjusting the position of the stylus module; the vertical column (51) is provided with a height adjustment knob (53) for controlling the lifting and lowering of the stylus module; The sample platform (6) is fixed on the horizontal substrate (52) and is used to place the sample substrate coated with silicone sealant.
2. The surface drying time detection device for silicone sealant according to claim 1, characterized in that, The timing module (4) includes a display screen (41) and a trigger circuit (42). The trigger circuit (42) is set to automatically stop timing when the pressure sensor (3) detects that the pressure value has dropped to 10% to 20% of the initial contact pressure.
3. The surface drying time detection device for silicone sealant according to claim 1, characterized in that, The diameter of the stylus (1) is 1-2 mm; or / and The head of the stylus (1) has a smooth, rounded tip; or / and The head end of the stylus (1) is made of PTFE material or coated with a PTFE anti-stick coating (7).
4. The surface drying time detection device for silicone sealant according to any one of claims 1-3, characterized in that, The pressure sensor (3) is embedded in the head of the stylus (1); or The timing module (4) is connected to the pressure sensor (3) via a wire; or One end of the horizontal plate (54) is connected to the stylus module, and the other end is rotatably connected to the vertical column (51); or The sample platform (6) is fixed to the horizontal substrate (52) by a magnetic base.
5. The surface drying time detection device for silicone sealant according to any one of claims 1-3, characterized in that, The elastic component is a spring; or The timing module (4) uses a digital timer; or The height adjustment knob (53) is a precision threaded knob.
6. The surface drying time detection device for silicone sealant according to any one of claims 1-3, characterized in that, The adjustment accuracy of the height adjustment knob (53) is ±0.1mm.
7. The surface drying time detection device for silicone sealant according to any one of claims 1-3, characterized in that, The elastic coefficient of the elastic reset mechanism (2) is 0.5 to 2 N / mm; The sensitivity range of the pressure sensor (3) is 0.1 to 1 N.
8. The device for detecting the surface drying time of silicone sealant according to any one of claims 1-3, characterized in that, The sample platform (6) has a grid scale printed on its surface.
9. The device for detecting the surface drying time of silicone sealant according to any one of claims 1-3, characterized in that, The stylus (1) is a stainless steel needle; The vertical column (51) and the horizontal plate (54) are made of aluminum alloy. The sample substrate is made of tempered glass.
10. The device for detecting the surface drying time of silicone sealant according to any one of claims 1-3, characterized in that: The silicone sealant surface drying time detection device also includes a temperature control module for heating the silicone sealant and testing its high-temperature curing.