Defoaming mold for preparing adhesive sample block for tensile test

Abstract

The utility model discloses a defoaming mould for preparing an adhesive sample block for a tensile test, which comprises a curing mould for manufacturing the adhesive sample block and a cylindrical barrel arranged in a centrifugal machine for centrifugal defoaming, and the curing mould is vertically arranged in the cylindrical barrel; the curing mold comprises a bottom mold and a cover plate, the cover plate is fixedly connected with the bottom mold through bolts arranged at four corners, the upper surface of the bottom mold is provided with a groove used for filling a to-be-tested experiment adhesive, and the top of the groove is provided with a residual adhesive groove. According to the utility model, the cylindrical barrel matched with the centrifugal machine is arranged, so that an adhesive is prevented from being thrown out to pollute the centrifugal machine in the centrifugal process, and a space is provided for air in the adhesive by arranging the curing mold with the residual adhesive groove, so that the shape of an adhesive sample block is prevented from being influenced by the air in the cover plate; by arranging the end grooves and the main body groove, clamping parts at the two ends of the adhesive sample block in a tensile experiment are formed, and the tensile experiment effect is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of electronic adhesive technology, and specifically relates to a defoaming mold for preparing adhesive sample blocks for tensile testing. Background Technology

[0002] Typically, the "tensile testing method" is used to measure the elongation at break of a material. Tensile testing of electronic adhesives provides information about the adhesive's strength and ductility; it is a destructive testing procedure that demonstrates how much force the adhesive can withstand before failure. Elongation at break is a measure of a material's ductility. This measurement shows how much a material can stretch before breaking, expressed as a percentage of its original size. It represents the material's ability to undergo deformation before failure. High ductility indicates that the material is more easily deformed and will not break, while low ductility indicates that the material is brittle and will break before deforming under tensile loads. The ductility of a material depends heavily on its chemical composition and is a critical consideration, especially when selecting materials that will withstand extreme cold. The tensile strength of a material is the maximum tensile stress it can withstand before failure (e.g., fracture or permanent deformation).

[0003] The main characteristics of highly thixotropic and high-viscosity adhesives are their high viscosity and poor flowability, generally allowing bonding on vertical or inclined surfaces. In experimental testing, such adhesives, when placed in a mold, require the experimenter to first slide the adhesive through the mold using a testing rod to fill it as much as possible. However, the adhesive is difficult to fill the corners and edges of the mold, requiring the experimenter to vigorously shake the mold up and down by hand to ensure filling. The mold containing the adhesive is then placed in a pre-set oven for curing. The cured sample often contains air bubbles (uneven surface), which are generated during the placement of the adhesive and the sliding of the testing rod. Furthermore, the sample may show slight deformation (bulging) after removal. This process is time-consuming and labor-intensive, leading to inaccurate test data. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a defoaming mold that is reasonably designed, easy to use, and can effectively eliminate air bubbles in adhesive samples, in order to address the shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A defoaming mold for preparing adhesive samples for tensile testing is characterized in that the mold includes a curing mold for making the adhesive sample and a cylindrical tube for centrifugal defoaming in a centrifuge. The bottom of the cylindrical tube is closed, and the top of the cylindrical tube has an inlet and outlet for the curing mold. The curing mold is vertically placed inside the cylindrical tube. The curing mold includes a bottom mold, the upper surface of which has a groove for filling the adhesive to be tested. One side of the groove has a residual adhesive groove to accommodate air and excess adhesive during defoaming. A cover plate for sealing the groove and the residual adhesive groove is installed on the upper surface of the bottom mold. The cover plate is fixedly connected to the bottom mold by bolts located at the four corners.

[0007] The technical problem to be solved by this utility model can also be achieved by the following technical solution: the groove is provided with a main groove for making the stretching part of the adhesive sample block, and the two ends of the main groove are provided with end grooves for making the clamping part of the adhesive sample block. The width of the end groove is smaller than the width of the main groove, and the end groove is connected to the main groove.

[0008] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the end groove is composed of a square groove and a trapezoidal groove, the large side of the square groove is connected to the large side of the trapezoidal groove, the small side of the trapezoidal groove is connected to the main groove, and the width of the main groove is smaller than the width of the end groove.

[0009] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the size of the curing mold is 4.8cm*10.3cm, the thickness of the curing mold is 0.5cm, and the depth of the groove is 0.3cm.

[0010] The technical problem to be solved by this utility model can also be achieved by the following technical solution: a sealing ring is installed between the bottom mold and the cover plate to prevent the adhesive from flowing out. The sealing ring is arranged along the circumference of the groove. A positioning groove for placing the sealing ring is provided on the bottom mold, which can effectively prevent the adhesive around the groove from flowing out during centrifugation.

[0011] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the bottom mold is a polytetrafluoroethylene mold body, the cover plate is a polytetrafluoroethylene plate, which is not easy to stick and is convenient to remove after the sample block is cured.

[0012] Compared with the prior art, this utility model facilitates centrifugation and defoaming by using a curing mold with a cover plate. The cylindrical tube prevents the adhesive from being thrown out and contaminating the centrifuge during centrifugation. The residual adhesive groove on one side of the curing mold provides a space for air in the adhesive to escape, preventing it from affecting the shape of the adhesive sample inside the cover plate. The end groove and main body groove form the clamping part at both ends and the main body tensile part of the adhesive sample in the tensile test, ensuring the tensile test effect. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the defoaming mold described in this utility model;

[0014] Figure 2 This is a structural diagram of the curing mold;

[0015] Figure 3 This is a structural diagram of the bottom mold.

[0016] In the diagram: 1-curing mold, 2-cylindrical cylinder, 3-bottom mold, 4-excess glue tank, 5-square tank, 6-trapezoidal tank, 7-main body tank. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0019] Reference Figure 1-3 A defoaming mold for preparing adhesive samples for tensile testing is disclosed. The mold includes a curing mold 1 for making adhesive samples and a cylindrical tube 2 for centrifugal defoaming in a centrifuge. The bottom of the cylindrical tube 2 is closed, and the top of the cylindrical tube 2 has an inlet and outlet for the curing mold. The curing mold 1 is vertically placed inside the cylindrical tube 2. The curing mold 1 includes a bottom mold 3. The upper surface of the bottom mold 3 has a groove for filling the adhesive to be tested. One side of the groove has a residual adhesive groove 4 to facilitate the containment of air and excess adhesive during defoaming. A cover plate for sealing the groove and the residual adhesive groove is installed on the upper surface of the bottom mold. The cover plate is fixedly connected to the bottom mold by bolts at the four corners. When the curing mold 1 is vertically placed inside the cylindrical tube 2, the residual adhesive groove is placed at the top.

[0020] The groove has a main groove for making the stretching part of the adhesive sample block. The main groove has end grooves at both ends for making the clamping part of the adhesive sample block. The width of the end groove is smaller than the width of the main groove, and the end grooves communicate with the main groove. A sealing ring is installed between the bottom mold and the cover plate to prevent adhesive leakage. The sealing ring is arranged along the circumference of the groove. The end groove consists of a square groove 5 and a trapezoidal groove 6. The square groove 5 connects to the larger side of the trapezoidal groove 6, and the smaller side of the trapezoidal groove 6 connects to the main groove 7. The thickness of the curing mold 1 is 0.5cm, the depth of the groove is 0.3cm, and the dimensions of the curing mold 1 are 4.8cm*10.3cm. The bottom mold 3 is a polytetrafluoroethylene (PTFE) mold body, and the cover plate is a PTFE plate, which is not easy to stick to and facilitates the removal of the sample block after curing. The adhesive sample block is cured and formed in the end groove.

[0021] The working process of the mold described in this utility model is as follows:

[0022] 1) Place the adhesive to be tested into the groove of the bottom mold 3 of the curing mold 1, cover it with the cover plate, and tighten the four corner screws;

[0023] 2) Insert the curing mold 1 into the cylindrical tube 2 with the part with the excess glue groove 4 facing upwards;

[0024] 3) Place cylindrical cylinder 2 in a centrifuge for centrifugation and defoaming;

[0025] 4) After centrifugation, remove the curing mold 1 and place it in the pre-set oven to begin curing.

[0026] 5) Remove the cured mold from the oven, unscrew the screws, take out the adhesive sample, and then fix the adhesive sample in the fixture of the universal tensile testing machine to perform the tensile test.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A defoaming mold for preparing adhesive sample blocks for tensile testing, characterized in that, The mold includes a curing mold for making adhesive sample blocks and a cylindrical tube for centrifugation and defoaming in a centrifuge. The bottom of the cylindrical tube is closed, and the top of the cylindrical tube has an inlet and outlet for the curing mold. The curing mold is placed vertically inside the cylindrical tube. The curing mold includes a bottom mold. The upper surface of the bottom mold has a groove for filling the adhesive to be tested. One side of the groove has a residual adhesive groove to accommodate air and excess adhesive during defoaming. A cover plate for sealing the groove and the residual adhesive groove is installed on the upper surface of the bottom mold. The cover plate is fixedly connected to the bottom mold by bolts located at the four corners.

2. The defoaming mold for preparing adhesive sample blocks for tensile testing according to claim 1, characterized in that, The groove is provided with a main groove for making the stretching part of the adhesive sample block, and the two ends of the main groove are provided with end grooves for making the clamping part of the adhesive sample block. The width of the end groove is smaller than the width of the main groove, and the end groove is connected to the main groove.

3. The defoaming mold for preparing adhesive sample blocks for tensile testing according to claim 2, characterized in that, The end slot is composed of a square slot and a trapezoidal slot. The square slot is connected to the larger side of the trapezoidal slot, and the smaller side of the trapezoidal slot is connected to the main slot.

4. A defoaming mold for preparing adhesive sample blocks for tensile testing according to claim 1, characterized in that, The dimensions of the curing mold are 4.8cm*10.3cm, the thickness of the curing mold is 0.5cm, and the depth of the groove is 0.3cm.

5. A defoaming mold for preparing adhesive sample blocks for tensile testing according to claim 1, characterized in that, A sealing ring is installed between the bottom mold and the cover plate to prevent adhesive from flowing out. The sealing ring is arranged along the circumference of the groove.

6. A defoaming mold for preparing adhesive sample blocks for tensile testing according to claim 1, characterized in that, The bottom mold is a polytetrafluoroethylene (PTFE) mold body, and the cover plate is a PTFE plate.

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