Tool mold for testing flowing property of pouring sealant

Abstract

The utility model discloses a tool mold for testing the flowing property of a pouring sealant. The tool mold is characterized by comprising a mold body, an upper cover plate, a pouring sealant storage tank, a tool mold suspension position, a glass observation cover plate, a constant width test groove, a glass observation cover plate fixing position, a gradual change flowing gap groove and a material baffle, the mold is made of polytetrafluoroethylene, a machining mode is adopted, two groups of testing grooves in one mold are prepared, and the testing grooves comprise gradual change flowing gap grooves and constant width testing grooves so as to simulate flooding of pouring sealant and the flowing state of the pouring sealant in a pouring component; meanwhile, during testing, the flowing state and process of the tested material in the mold can be checked in real time through the glass observation cover plate, the process is closer to the actual testing process, and the performance of the pouring sealant can be judged conveniently.

Description

Technical Field

[0001] The utility model relates to the field of potting glue, in particular to a tooling die for testing potting fluidity performance. Background Art

[0002] Potting compounds, with their excellent performance, low viscosity, good permeability, and suitability for large-scale automated production, are widely used in sealing, insulating, moisture-proofing, and seismic applications in electronic components. Viscosity and fluidity are key factors influencing potting effectiveness. Viscosity refers to the frictional resistance between the resin and particles within the compound and is often assessed using a rotational viscometer. Fluidity refers to the ability of the compound to flow during the potting process. Fluidity testing is currently performed by pouring the compound into a groove at the top of a test mold, then placing the mold on a fixed support and measuring the vertical distance the compound flows per unit time. It is generally believed that potting compounds with low viscosity and good fluidity help reduce bubbles and defects during the potting process and more easily penetrate into the interior of the component being potted and into narrow spaces. However, in practice, the flow of potting compounds within the potted component is often affected by various factors. Researchers and production personnel have designed different molds and developed different methods to more realistically assess potting performance, but these methods still present varying challenges and drawbacks.

[0003] To address these issues, CN211784960 U discloses a tool for measuring the flow properties of silicone potting compounds. This tool utilizes a mold with a top surface at an angle of 30 to 60 degrees to the ground, meaning the colloid flows on an inclined surface. While this allows for intuitive assessment of potting compound flow, it differs significantly from the internal flow observed during actual potting. Furthermore, the curing tank of this device is 20 to 25 cm deep and 0.1 to 1 cm wide, making it difficult to clean after testing. CN115078177A discloses a device and method for testing the flow properties of adhesives. This device characterizes the flow properties of adhesives through the rod-climbing effect of adhesive polymers. However, this equipment is complex and significantly deviates from actual application. Therefore, to meet the requirements for potting compound testing that is close to actual application and address the issues with existing prototype tooling, it is imperative to develop a tool that can more closely resemble actual potting applications, is simple to operate, facilitates observation and comparison, is easy to clean, and can be reused multiple times. Utility Model Content

[0004] Based on the problems described in the background technology, the utility model provides a tooling mold for simulating the test of the flow performance of potting glue, which has the advantages of simple structure, convenient operation, convenient observation and testing, easy cleaning, and good repeatability.

[0005] A tooling mold for testing the flow properties of potting glue, characterized in that the mold includes a mold body, an upper cover, a potting glue storage tank, a tooling mold hanging position, a glass observation cover, a constant width test groove, a glass observation cover fixing position, a gradient flow gap groove and a material baffle; two groups of rectangular grooves are arranged on the mold body, the left group is 2 constant width test grooves, and the right group is 2 gradient flow gap grooves, an upper cover and a potting glue storage tank are arranged above the mold body, and a material baffle is arranged below the upper cover; glass observation cover fixing positions are arranged at the four corners of the front of the mold body; tooling mold hanging positions are arranged at both ends of the back of the mold body.

[0006] The size of the mold is 500mm*500mm*22mm, and the mold material is polytetrafluoroethylene. The surface polarity of the material is very low, and it will not stick to the test, making it easy to clean.

[0007] The dimensions of the upper cover plate are length * width * thickness: 500mm * 3mm * 22mm; four identical hollow cylinders with a diameter and height of 20mm * 3mm are arranged on the upper cover plate, and the hollow cylinders are connected to the bottom surface of the potting glue storage tank. The upper cover plate and the potting glue storage tank are both made of polytetrafluoroethylene.

[0008] The potting glue storage trough is a hollow frustum with a height of 80 mm, a bottom circle diameter of 20 mm, and a top circle diameter of 50 mm. The material flows into the test groove through the potting glue storage trough to ensure that there is enough glue entering the test groove at the beginning to simulate the flow process of the potting glue.

[0009] The material baffle is provided with 4 equidistant cuboids and 2 pull rings, which serve as a control switch for the colloid to flow into the test groove; the material baffle blocks the test colloid from entering the test mold before testing, and allows the colloid to flow into the test tooling at the same time during testing to avoid test errors.

[0010] The glass observation cover on the mold body is fixed at three magnetic connection points and one mechanical connection point, located at the four corners of the front of the mold body.

[0011] The glass observation cover is provided with three magnetic connection points and one mechanical connection point at the four corners. After the magnetic connection points are magnetically positioned with the magnetic connection on the mold body, the mechanical connection points are tightened to connect with the mold body.

[0012] The length * width * height of the constant width test groove and the gradient flow gap groove are: 20mm * 500mm * 21mm; the constant width test groove can intuitively simulate the fluidity of the potting glue during flooding; the gradient flow gap groove more realistically simulates the flow state of the potting glue inside the potting component.

[0013] Three levels of baffles are provided on the gradient flow gap groove, with a total of 6 baffles divided into three levels. Each level consists of two identical baffles with an inclination angle of 45°. The opening of the first-level baffle is 10 mm away from the wall width of the gradient flow gap groove; the opening of the second-level baffle is 5 mm away from the wall width of the gradient flow gap groove; and the opening of the third-level baffle is 2 mm away from the wall width of the gradient flow gap groove.

[0014] The constant width grooves and the gradient flow gap grooves are respectively provided in two groups of four, to facilitate equal testing and comparison.

[0015] Below the two sets of constant-width grooves and the gradient-flow slit grooves is the glue outlet. Each of these outlets receives the outflowing glue in a separate, identical measuring cup. The amount of potting glue flowing out can be determined by the volume of the glue in the measuring cup or by weighing the entire container. This allows for comparison and judgment, while preventing contamination from dripping onto the test surface and facilitating cleanup.

[0016] The utility model provides a tooling mold for simulating the flow performance test of potting glue, which has the following characteristics:

[0017] (1) The constant width groove and the gradually changing width groove of the flow gap provided in the present invention can not only intuitively simulate the fluidity of the potting glue during flooding, but also truly reflect the fluidity of the glue in the actual potting glue; at the same time, two sets of test fixture grooves are provided respectively, which can be used for parallel comparison of samples during testing;

[0018] (2) The mold body of the utility model is provided with magnetic connection points and mechanical connection points, which not only provide a stable connection function but also facilitate assembly and disassembly;

[0019] (3) The present invention is provided with a glass cover for observing the fluidity of the colloid, which can directly observe the flow state of the colloid, avoiding the need to only measure the outflow time of the colloid without knowing its flow state inside the mold;

[0020] (4) Each grooved glue outlet provided in the present invention receives the container for the outflowing glue material, which is a separate single measuring cup of the same volume. The outflow amount of the potting glue can be determined based on the volume of the glue material in the measuring cup or by weighing the entire container, and a comparative judgment can be made. At the same time, the test table can be prevented from being contaminated by material dripping, and the test table is easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic diagram of a tooling mold structure for testing the flow properties of potting glue.

[0022] Figure 2 This is a schematic diagram of a gradual flow test groove of a tooling mold for testing the flow performance of potting glue in the utility model; wherein, Figure 2 A schematic diagram with a ruler is shown on the left.

[0023] Figure 3 The utility model is a schematic diagram of a material baffle structure of a tooling mold for testing the flow properties of potting glue.

[0024] Figure 4 The utility model is a schematic diagram of a glass observation cover structure of a tooling mold for testing the flow properties of potting glue.

[0025] Among them, 1-potting glue storage trough, 2-tooling mold hanging position, 3-glass observation cover, 4-constant width test groove, 5-glass observation cover fixing position, 6-gradual flow gap groove, 7-material baffle, 8-test mold body, 9-upper cover. DETAILED DESCRIPTION

[0026] In order to more clearly express the role and advantages of the tooling mold for simulating the flow performance test of the potting glue of the present invention, the technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0027] The utility model discloses a tooling mold for simulating the flow performance test of potting glue, such as Figure 1 As shown, 1- potting glue storage tank, 2- tooling mold hanging position, 3- glass observation cover, 4- constant width test mold groove, 5- glass observation cover fixed, 6- gradient flow gap groove, 7- material baffle, 8- test mold body, 9- upper cover. Before the tooling mold is tested for potting glue viscosity, 1- potting glue storage tank, 3- glass observation cover, 4- constant width test groove, 5- glass observation cover fixed, 6- gradient flow gap groove, 7- material baffle, 8- test mold body, 9- upper cover are cleaned to ensure there are no stains; fix the mold on the test station through 2- tooling mold hanging position, magnetically position the magnetic link on 3- glass observation cover with the magnetic link on the mold, and then tighten the mechanical link point to ensure that the glass cover fits and seals the mold; insert 7- material baffle into 8- test mold body and 9- The corresponding position between the upper cover plates ensures that the material baffle fits tightly against the bottom of the material storage tank and the material inlet of the test mold to avoid leakage of the test material; during the actual test, pour the material into the potting glue storage tank and then pull out the material baffle; the material enters the groove of the test mold for a fluidity comparison test. During the test, the flow state of the colloid in the mold can be observed through the glass cover plate, and the flow distance of the colloid in the same test time can be compared. The colloid can also be waited for to flow into the measuring cup placed at the bottom of the mold, and the volume test or weighing test of the colloid in the measuring cup can be performed to determine the outflow of the potting glue for comparison and judgment.

[0028] Example 1

[0029] Comparison of high-viscosity colloid flow lengths: Potting compounds A and B with a viscosity of 30,000 mPa*s (tested at 25°C using a Brookfield DVS+, rotor #6, 10 rpm) were selected. Each potting compound storage tank (1) was filled with the compound. A stopwatch was prepared, and a measuring cup was placed at the outlet of each groove. The material baffle (7) was opened and the timing was started. The compound began to flow in the test grooves. The test lasted 5 minutes. Potting compound A had a flow length of 215 mm in the constant-width groove, flowing into the second baffle of the second stage in the gradient flow gap groove. Potting compound B had a flow length of 180 mm in the constant-width groove, flowing into the first baffle of the first stage in the gradient flow gap groove. For potting compounds A and B with the same viscosity, deviations in flowability can be clearly distinguished in the mold of the present invention based on the flow length of the compound in the mold.

[0030] Example 2

[0031] Comparison of medium-viscosity colloid outflow volume: Potting compounds C and D with a viscosity of 12,000 mPa*s (tested at 25°C, using a Brookfield DVS+, rotor #5, 10 rpm) were selected. Each potting compound storage tank (1) was filled with the compound. A stopwatch was prepared, and a measuring cup was placed at the outlet of each groove. The material baffle (7) was opened and the timing was started. The compound began to flow in the test mold. The test lasted 5 minutes. The outflow volume of potting compound C in the constant-width groove was 30 ml, and the outflow volume in the gradient flow slit groove was 12 ml. The outflow volume of potting compound D in the constant-width groove was 42 ml, and the outflow volume in the gradient flow slit groove was 21 ml. For potting compounds C and D with the same viscosity, the mold of the present invention clearly distinguishes the deviation in fluidity based on the volume of the compound flowing out of the mold.

[0032] Example 3

[0033] Comparison of low-viscosity colloid flow times: Potting compounds E and F with a viscosity of 5000 mPa*s (tested at 25°C using a Brookfield DVS+, rotor #5, 20 rpm) were selected. Each potting compound storage tank (1) was filled with the compound. A stopwatch was prepared, and a measuring cup was placed at the outlet of each groove. The material baffle (7) was opened and timing began. The compound began to flow in the test mold. Potting compound E took 1.5 minutes to flow through the constant-width groove and 4 minutes to flow through the gradient-flow slit groove. Potting compound F took 1 minute to flow through the constant-width groove and 2.5 minutes to flow through the gradient-flow slit groove. For potting compounds E and F with the same viscosity, deviations in flowability can be clearly distinguished in the mold of the present invention based on the time it takes for the compound to flow out of the mold's fixed colloid.

[0034] Table 1 is the flow performance test data of the tooling mold of the present invention used in Examples 1-3

[0035] Table 1

[0036]

[0037] Note: As can be seen from the data in Table 1, the flow performance test data of potting compounds of the same viscosity in the tooling mold of the present invention varies. For high-viscosity colloids, it is difficult to flow out, which can be compared by the flow length at a fixed time, such as potting compounds A and B in Example 1. For medium-viscosity colloids, the outflow is moderate, which can be compared by the outflow volume at a fixed time, such as potting compounds C and D in Example 2. For low-viscosity colloids, the outflow speed is fast, which can be compared by the time it takes to completely flow out, such as potting compounds E and F in Example 3. Compared with the existing technology, the mold described in the utility model solves the problem that existing testing methods, which rely solely on viscosity and the flow of the colloid in a simple mold, cannot accurately reflect the flowability and actual potting performance of the potting compound.

Claims

1. A tooling mold for testing the flow properties of potting glue, characterized in that The mold includes a mold body, an upper cover, a potting glue storage tank, a tooling mold hanging position, a glass observation cover, a constant width test groove, a glass observation cover fixing position, a gradient flow gap groove and a material baffle; two groups of rectangular grooves are arranged on the mold body, the left group is 2 constant width test grooves, and the right group is 2 gradient flow gap grooves, an upper cover and a potting glue storage tank are arranged above the mold body, and a material baffle is arranged below the upper cover; glass observation cover fixing positions are arranged at the four corners of the front of the mold body; tooling mold hanging positions are arranged at both ends of the back of the mold body.

2. A tooling mold for testing the flow properties of potting glue as claimed in claim 1, characterized in that The dimensions of the mold body are length*width*height: 500mm*500mm*22mm, and the mold material is polytetrafluoroethylene.

3. A tooling mold for testing the flow properties of potting glue as claimed in claim 1, characterized in that The dimensions of the upper cover plate are length * width * thickness: 500mm * 3mm * 22mm; four identical hollow cylinders with equidistant diameter and height of 20mm * 3mm are arranged on the upper cover plate, and the hollow cylinders are connected to the bottom surface of the potting glue storage tank. The upper cover plate and the potting glue storage tank are both made of polytetrafluoroethylene.

4. A tooling mold for testing the flow properties of potting glue as claimed in claim 1, characterized in that The potting glue storage tank is a hollow frustum with a height of 80 mm, a bottom diameter of the hollow frustum is 20 mm, and a top diameter of the hollow frustum is 50 mm.

5. A tooling die for testing the flow properties of potting compound according to claim 1, characterized in that The material baffle is provided with four equidistant rectangular blocks and two pull rings, which serve as control switches for the colloid to flow into the test groove.

6. A tooling die for testing the flow properties of potting compound according to claim 1, characterized in that The glass observation cover on the mold body is fixed at three magnetic connection points and one mechanical connection point, located at the four corners of the front of the mold body.

7. A tooling die for testing the flow properties of potting compound according to claim 1, characterized in that The glass observation cover is provided with three magnetic connection points and one mechanical connection point at the four corners. After the magnetic connection points are magnetically positioned with the magnetic connection on the mold body, the mechanical connection points are tightened to connect with the mold body.

8. A tooling die for testing the flow properties of potting compound according to claim 1, characterized in that The length*width*height of the constant width test groove and the gradient flow gap groove are: 20mm*500mm*21mm.

9. A tooling die for testing the flow properties of potting compound according to claim 1, characterized in that Three levels of baffles are set on the gradient flow gap groove. There are a total of 6 baffles divided into three levels. Each level consists of two identical baffles with an inclination angle of 45°. The opening of the first-level baffle is 10 mm away from the wall width of the gradient flow gap groove; the opening of the second-level baffle is 5 mm away from the wall width of the gradient flow gap groove; the opening of the third-level baffle is 2 mm away from the wall width of the gradient flow gap groove.

10. A tooling die for testing the flow properties of potting compound according to claim 1, characterized in that The container for receiving the outflowing rubber material from each mold glue outlet is a separate single measuring cup with the same volume.

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