Sealing material film forming device

Abstract

The utility model relates to sealing material diaphragm forming device, it includes the upper and lower parallel interval arrangement's upper pressing plate and lower pressing plate, flexible isolation component, drive upper and lower pressing plate face to face close or far away movement's forming power ware, wherein the upper pressing plate forms upper datum plane from the bottom surface, the lower pressing plate forms lower datum plane from the top surface, the isolation component sets up between upper and lower datum plane and forms to have the film -forming space, and sealing material is placed in the film -forming space. The utility model one aspect based on the cooperation of upper and lower pressing plate, isolation component, make sealing material under the upper and lower direction normal pressure even flow development film -forming with upper and lower datum plane as the benchmark, effectively promote the thickness uniformity and surface flatness of diaphragm, significantly reduce the probability of forming bubble in diaphragm, another aspect is convenient to realize the standardization of film -forming operation, and simple operation, film -forming efficiency is high, and diaphragm quality stability is high.

Description

Technical Field

[0001] This utility model belongs to the field of sealing material technology, specifically relating to a sealing material diaphragm forming device. Background Technology

[0002] In numerous fields such as construction, automotive, and aerospace, the performance of sealants directly affects the long-term reliability and safety of structural seals. Among these, the elongation and strength (including tensile strength) of the sealant are core indicators for evaluating its performance and predicting its long-term functionality in practical dynamic joint applications. Excellent elongation ensures that the sealant can withstand repeated displacement of the joint caused by factors such as temperature changes, wind loads, and vibration without cracking; sufficient strength ensures that the sealant itself will not be damaged or broken during movement. A good balance between these two is the fundamental prerequisite for the sealant to work reliably throughout its expected service life. Neglecting accurate testing of these key indicators will significantly increase the risk of premature failure of the sealing system, potentially leading to leaks, structural damage, energy loss, high maintenance costs, and even safety hazards. Therefore, conducting rigorous elongation and strength tests on sealants according to relevant standards (such as GB / T528—2009 "Determination of Tensile Stress-Strain Properties of Vulcanized Rubber or Thermoplastic Rubber" and JG / T 475—2015 "Silicone Structural Sealants for Building Curtain Walls") is an indispensable part of product development, quality control, material selection, and project acceptance. The prerequisite for conducting these key performance tests is to prepare high-quality sealant films (test pieces) with uniform thickness that meet the standard requirements.

[0003] The current mainstream film-forming method in the industry is to use a stainless steel strip or baffle to manually scrape the sealant onto a smooth substrate (such as a polytetrafluoroethylene sheet).

[0004] However, in the actual sample preparation process, the existing methods have the following drawbacks:

[0005] 1. Manual coating not only relies on the operator's skills, making it difficult to standardize operations, resulting in low efficiency and poor reproducibility, but also makes it difficult to precisely control and maintain a constant pressure, speed, and angle during manual operation. This leads to large fluctuations in the thickness of the coated film, making it difficult to guarantee flatness. The thickness of specimens varies significantly between different batches and even within the same batch, which directly affects the accuracy of stress and strain data (such as modulus calculation) and the comparability of results in subsequent tensile tests.

[0006] 2. During the coating process, the colloid is subjected to strong compression and stretching, which easily traps air and forms bubbles. At the same time, the friction and stretching between the colloid and the scraper and substrate may also cause defects such as local tearing, scratches or uneven surfaces. These bubbles and defects will become stress concentration points in the tensile test, causing the specimen to break prematurely and failing to truly reflect the intrinsic properties of the material. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a brand-new sealing material diaphragm forming device.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A sealing material diaphragm forming apparatus includes an upper pressure plate and a lower pressure plate arranged parallel to each other, a flexible isolation component, and a forming power unit that drives the upper and lower pressure plates to move towards or away from each other. The upper pressure plate forms an upper reference surface from its bottom surface, and the lower pressure plate forms a lower reference surface from its top surface. The isolation component is disposed between the upper and lower reference surfaces and forms a film-forming space. The sealing material is placed in the film-forming space. As the upper and lower pressure plates move towards each other and compress the isolation component, the upper and lower pressure plates respectively form positive pressures in the vertical direction to compress the isolation component. The film-forming space is simultaneously compressed in the vertical direction and drives the sealing material to spread and form a film based on the upper and lower reference surfaces.

[0010] Preferably, the centers of the upper and lower reference surfaces are aligned with the center of the film-forming space, and the sealing material is placed in the center of the film-forming space during material placement. This ensures that the sealing material spreads evenly in all directions during the film-forming process, improving the uniformity of the thickness of the formed film from the center to the edge.

[0011] According to a specific embodiment and preferred aspect of this utility model, the isolation component includes an upper isolation layer and a lower isolation layer, wherein a film-forming space is formed between the upper and lower isolation layers, and during film formation, the thickness of the sealing material film is equal to the distance between the upper and lower reference surfaces minus the sum of the thicknesses of the upper and lower isolation layers. This improves the accuracy of the film thickness; simultaneously, based on the upper and lower isolation layers, the circumferential direction is open, thus further facilitating the discharge of gas from the sealing material during extrusion film formation.

[0012] Preferably, the upper and lower isolation layers have equal thicknesses; and / or, both the upper and lower isolation layers are made of isolation membranes. Using isolation membranes in conjunction with these layers allows for the stable fabrication of films with smooth surfaces, comprehensively ensuring the reliability of sealant performance testing.

[0013] According to another specific embodiment and preferred aspect of this utility model, the forming device further includes a pad disposed between the upper pressure plate and the lower pressure plate for controlling the film thickness of the sealing material. During film formation, the distance between the upper and lower reference surfaces is equal to the height of the pad. By selecting pads of different heights, films of various standard thicknesses can be easily and quickly prepared.

[0014] Preferably, there are at least two pads and they are arranged on opposite sides of the lower reference surface. The isolation component is placed between the pads on both sides. During film formation, the upper pressure plate abuts against the pads from the bottom surface.

[0015] According to another specific embodiment and preferred aspect of this utility model, the lower pressure plate is provided with multiple vertically extending guide rods around its perimeter, and the upper pressure plate is slidably connected to the multiple guide rods. The molding power unit drives the upper pressure plate to slide up and down. The structure is compact, the operation is stable and reliable, and the maintenance cost is low.

[0016] Preferably, the molding power unit includes a fixed frame fixedly connected to the upper ends of multiple guide rods and a cylinder mounted on the fixed frame, wherein the telescopic end of the cylinder passes downward through the fixed frame and is fixedly connected to the upper pressure plate. Here, a pneumatic cylinder is used, which significantly simplifies the operation steps, shortens the film formation cycle, and improves work efficiency compared to manual or mechanical screw pressurization, and is especially suitable for two-component sealants that require rapid processing.

[0017] Specifically, the telescopic end of the cylinder is connected to the center of the top surface of the upper pressure plate.

[0018] In addition, the molding power unit also includes a pressure monitoring device for monitoring the cylinder's downward pressure. By monitoring the film-forming pressure in real time, users can flexibly adjust and maintain the optimal pressing pressure according to the rheological properties and thickness requirements of different sealants, ensuring the film's density and surface quality.

[0019] Due to the implementation of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] Existing manual coating techniques not only rely on operator skills, making standardized operation difficult, but also suffer from low efficiency and poor reproducibility. Furthermore, the pressure, speed, and angle of manual operation are difficult to precisely control and maintain consistently, resulting in large fluctuations in the thickness of the coated film and difficulty in ensuring flatness. Significant differences in thickness exist between different batches and even within the same batch of specimens. This directly affects the accuracy of stress and strain data (such as modulus calculation) and the comparability of results in subsequent tensile tests. Moreover, during coating, the adhesive is subjected to strong compression and stretching, which easily traps air and forms bubbles. At the same time, friction and stretching between the adhesive and the scraper and substrate can also cause defects such as localized tears, scratches, or surface unevenness. These bubbles and defects become stress concentration points during tensile testing, causing the specimen to break prematurely and failing to accurately reflect the intrinsic properties of the material. This application presents a comprehensive structural design for a sealing material diaphragm forming device, cleverly addressing the shortcomings and defects of existing technologies. With this forming device, an isolation component is placed between the upper and lower reference surfaces formed by the upper and lower pressure plates, and the sealing material is placed within the film-forming space formed by the isolation component. Then, a forming power unit drives the upper and lower pressure plates to move up and down, pressing against the isolation component. This causes the film-forming space to compress synchronously in the vertical direction, driving the sealing material to spread and form a film based on the upper and lower reference surfaces. Therefore, compared to existing technologies, this invention, on the one hand, leverages the cooperation of the upper and lower pressure plates and the isolation component to ensure that the sealing material spreads uniformly under positive pressure in the vertical direction, using the upper and lower reference surfaces as references to form a film. This effectively improves the thickness uniformity and surface smoothness of the film, significantly reducing the probability of air bubbles forming in the film. On the other hand, it facilitates the standardization of the film-forming operation, is simple to operate, has high film-forming efficiency, and high film quality stability. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a front view schematic diagram of the sealing material diaphragm forming apparatus of this embodiment;

[0023] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0024] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point B;

[0025] Wherein: 1. Upper pressure plate; m1. Upper reference surface;

[0026] 2. Lower pressure plate; m2. Lower reference surface; s. Guide rod;

[0027] 3. Isolation component; 30. Upper isolation layer; 31. Lower isolation layer; q. Film-forming space;

[0028] 4. Molding power unit; 40. Fixing frame; 41. Cylinder; g. Support rod; 42. Pressure monitoring component;

[0029] 5. Spacer blocks. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, 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", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0035] like Figures 1 to 3 As shown, the sealing material diaphragm forming apparatus involved in this embodiment includes an upper pressure plate 1, a lower pressure plate 2, an isolation component 3, and a forming power unit 4. This embodiment is applicable to the preparation of single-component sealant and two-component sealant diaphragms.

[0036] Specifically, the upper pressure plate 1 and the lower pressure plate 2 are arranged parallel to each other vertically. The lower pressure plate 2 is fixed to the working platform, and multiple vertically extending guide rods s are provided around the lower pressure plate 2. The upper pressure plate 1 is slidably connected to the multiple guide rods s, and the upper pressure plate 1 and the lower pressure plate 2 are driven by the forming power unit 4 to move towards or away from each other. At the same time, the upper pressure plate 1 forms an upper reference surface m1 from its bottom surface, and the lower pressure plate 2 forms a lower reference surface m2 from its top surface. The upper pressure plate 1 and the lower pressure plate 2 each include a base plate and a reference module set on the base plate and correspondingly forming upper and lower reference surfaces. The upper pressure plate 1 and the lower pressure plate 2 are arranged symmetrically vertically.

[0037] For ease of implementation, the diaphragm forming apparatus of this embodiment also includes a pad 5 disposed between the upper pressure plate 1 and the lower pressure plate 2 to control the film thickness of the sealing material. During film formation, the distance between the upper and lower reference surfaces is equal to the height of the pad 5. By selecting pads of different heights as physical limits, it is ensured that the thickness of the pressed film strictly meets the standard requirements (e.g., 1.5mm, 2mm, 3mm), with minimal thickness error (controllable within ±0.05mm), good consistency, and easy and rapid preparation of films of various standard thicknesses.

[0038] In some specific embodiments, there are at least two pads 5, which are arranged on opposite sides of the lower reference surface m2. The isolation member 3 is placed between the pads 5 on both sides and its width is less than or equal to the distance between the pads on both sides. During film formation, the upper pressure plate 1 abuts against the pads 5 from the bottom surface. The pads 5 are standard parts.

[0039] In this example, the isolation component 3 is made of flexible material and is placed between the upper reference surface m1 and the lower reference surface m2, forming a film-forming space q. The sealing material is placed in the film-forming space q. As the upper and lower pressure plates approach each other and squeeze the isolation component 3, the upper and lower pressure plates respectively form positive pressures in the vertical direction to squeeze the isolation component 3. The film-forming space q is simultaneously compressed in the vertical direction and drives the sealing material to spread and form a film with the upper and lower reference surfaces as references.

[0040] To further facilitate implementation, the centers of the upper and lower reference planes and the center of the film-forming space q are aligned, and during material placement, the sealing material is placed at the center of the film-forming space q. This ensures that the sealing material spreads evenly in all directions during film formation, improving the uniformity of the film thickness from the center to the edge.

[0041] In some specific embodiments, the isolation component 3 includes an upper isolation layer 30 and a lower isolation layer 31, wherein a film-forming space q is formed between the upper isolation layer 30 and the lower isolation layer 31. During film formation, the thickness of the sealing material film is equal to the distance between the upper reference surface m1 and the lower reference surface m2 minus the sum of the thicknesses of the upper isolation layer 30 and the lower isolation layer 31. This improves the accuracy of the film thickness; simultaneously, based on the upper and lower isolation layers, the circumferential direction is open, thus further facilitating the discharge of gas from the sealing material during extrusion film formation. During the material placement operation, the lower isolation layer 31 is laid flat on the lower reference surface m2, the sealing material is placed on the lower isolation layer 31, and then the upper isolation layer 32 is laid on top of the sealing material.

[0042] Meanwhile, the upper isolation layer 30 and the lower isolation layer 31 have the same thickness, and both the upper isolation layer 30 and the lower isolation layer 31 are made of isolation membranes and are standard parts. When used in conjunction with the isolation membrane, a film with a smooth surface can be stably produced, comprehensively ensuring the reliability of sealant performance testing.

[0043] In this example, the molding power unit 4 drives the upper pressure plate 1 to slide up and down, and includes a fixed frame 40 fixedly connected to the upper end of multiple guide rods s, a cylinder 41 mounted on the fixed frame 40, and a pressure monitoring component 42. The telescopic end of the cylinder 41 passes downward through the fixed frame 40 and is fixedly connected to the upper pressure plate 1. Here, a pneumatic switch is used to control the pneumatic cylinder with one button. The pressing process is fast, smooth, and labor-saving. Compared with manual pressurization or mechanical screw pressurization, it significantly simplifies the operation steps, shortens the film formation cycle, and improves work efficiency, especially suitable for two-component sealants that require rapid processing.

[0044] For ease of implementation, the cylinder 41 is connected to the fixed frame 40 on both sides by support rods g of equal height to keep the telescopic end vertical, thereby ensuring that the pressure plate moves smoothly without deviation, and the telescopic end of the cylinder 41 is connected to the center of the top surface of the upper pressure plate 1.

[0045] In addition, the pressure monitoring component 42 uses a pressure gauge mounted on the cylinder 41 to monitor the downward pressure value of the cylinder 41. By monitoring the film-forming pressure value in real time, users can flexibly adjust and maintain the optimal pressing pressure according to the rheological properties and thickness requirements of different sealants, ensuring the density and surface quality of the diaphragm.

[0046] In summary, after adopting this molding device, the isolation component is first placed between the upper and lower reference surfaces formed by the upper and lower pressure plates, and the sealing material is placed in the film-forming space formed by the isolation component. Then, the upper and lower pressure plates are driven to move up and down to squeeze the isolation component by the molding power unit, so that the film-forming space is compressed synchronously in the vertical direction and the sealing material is driven to spread and form a film with the upper and lower reference surfaces as references. Therefore, compared with the prior art, this utility model, on the one hand, is based on the cooperation of the upper and lower pressure plates and the isolation components, so that the sealing material is uniformly spread and formed into a film under the positive pressure in the upper and lower directions with the upper and lower reference surfaces as the reference, effectively improving the thickness uniformity and surface flatness of the film, and significantly reducing the probability of air bubbles forming in the film; on the other hand, it facilitates the standardization of film formation operation, and the operation is simple, with high film formation efficiency and high film quality stability; thirdly, it ensures that the sealing material is uniformly spread in all directions during the film formation process, improving the uniformity of the thickness of the formed film from the center to the edge area; fourthly, based on the upper and lower isolation layers, the circumferential direction is open, so it is easier for the gas in the sealing material to be discharged during the extrusion film formation, and at the same time, combined with the use of the isolation membrane, it effectively prevents adhesion, and can stably prepare a film with a flat surface, comprehensively ensuring the reliability of the sealant performance test; fifthly, through the... Real-time monitoring of film-forming pressure allows users to flexibly adjust and maintain optimal pressing pressure according to the rheological properties and thickness requirements of different sealants, ensuring membrane density and surface quality. Sixthly, by using pads of different heights as physical limits, the pressed membrane thickness strictly meets standard requirements (e.g., 1.5mm, 2mm, 3mm), with minimal thickness error (controllable within ±0.05mm), good consistency, and easy and rapid preparation of membranes of various standard thicknesses. Seventhly, it is suitable for the direct molding of single-component sealants, especially meeting the special process requirements of rapid and precise film formation after mixing two-component sealants. Eighthly, the support rod ensures stable and unbiased movement of the pressure plate, and combined with the use of a release liner, effectively prevents adhesion, ensuring that the resulting membrane has uniform thickness, a smooth and flat surface, and clear edges, meeting high-standard testing or application requirements.

[0047] The present utility model has been described in detail above, with the aim of enabling those skilled in the art to understand its contents and implement it. However, this description should not be construed as limiting the scope of protection of the present utility model. All equivalent changes or modifications made in accordance with the spirit and essence of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A sealing material diaphragm forming apparatus, characterized in that, It includes an upper pressure plate and a lower pressure plate arranged parallel to each other, a flexible isolation component, and a molding power unit that drives the upper and lower pressure plates to move towards or away from each other. The upper pressure plate forms an upper reference surface from its bottom surface, and the lower pressure plate forms a lower reference surface from its top surface. The isolation component is disposed between the upper and lower reference surfaces and forms a film-forming space. The sealing material is placed in the film-forming space. As the upper and lower pressure plates move towards each other, the upper and lower pressure plates respectively form positive pressures in the vertical direction to compress the isolation component. The film-forming space is simultaneously compressed in the vertical direction and drives the sealing material to spread and form a film with the upper and lower reference surfaces as references.

2. The sealing material diaphragm forming apparatus according to claim 1, characterized in that, The centers of the upper and lower reference planes and the center of the film-forming space are aligned, and the sealing material is placed in the center of the film-forming space during material placement.

3. The sealing material diaphragm forming apparatus according to claim 1, characterized in that, The isolation component includes an upper isolation layer and a lower isolation layer, wherein the upper isolation layer and the lower isolation layer form the film-forming space, and during film formation, the thickness of the sealing material film is equal to the distance between the upper and lower reference surfaces minus the sum of the thicknesses of the upper and lower isolation layers.

4. The sealing material diaphragm forming apparatus according to claim 3, characterized in that, The upper and lower isolation layers have the same thickness; and / or, both the upper and lower isolation layers are made of isolation membranes.

5. The sealing material diaphragm forming apparatus according to claim 1, characterized in that, The forming device also includes a pad disposed between the upper pressure plate and the lower pressure plate for controlling the film thickness of the sealing material. During film formation, the distance between the upper and lower reference surfaces is equal to the height of the pad.

6. The sealing material diaphragm forming apparatus according to claim 5, characterized in that, There are at least two pads and they are arranged on opposite sides of the lower reference surface. The isolation component is placed between the pads on both sides. During film formation, the upper pressure plate abuts against the pads from the bottom surface.

7. The sealing material diaphragm forming apparatus according to claim 1, characterized in that, The lower pressure plate is provided with multiple vertically extending guide rods around its perimeter. The upper pressure plate is slidably connected to the multiple guide rods, and the molding power unit drives the upper pressure plate to slide up and down.

8. The sealing material diaphragm forming apparatus according to claim 7, characterized in that, The forming power unit includes a fixed frame fixedly connected to the upper ends of the multiple guide rods and a cylinder disposed on the fixed frame, wherein the telescopic end of the cylinder passes downward through the fixed frame and is fixedly connected to the upper pressure plate.

9. The sealing material diaphragm forming apparatus according to claim 8, characterized in that, The telescopic end of the cylinder is connected to the center of the top surface of the upper pressure plate.

10. The sealing material diaphragm forming apparatus according to claim 8, characterized in that, The forming power unit also includes a pressure monitoring device for monitoring the cylinder's downward pressure value.

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