Tensile testing machine for testing tensile strength of LED packaging adhesive

Abstract

The utility model discloses a tensile testing machine for testing the tensile strength of an LED packaging adhesive. The tensile testing machine comprises a base, a fixed seat, a sliding seat, a driving mechanism, a first clamp, a second clamp, a corrugated pipe, a hot air device, a tensile force sensor, a controller and an infrared temperature measurement sensor for detecting the temperature of an object to be tested, the driving mechanism can drive the sliding seat, the first clamp and the tension sensor to move up and down; a containing cavity is defined by the base, the corrugated pipe and the first clamp together, the second clamp is arranged in the containing cavity, and the infrared temperature measuring sensor is installed at the upper end of the second clamp. A pipe body of the corrugated pipe is composed of an outer layer and an inner layer, and an air inlet interlayer is formed between the outer layer and the inner layer. The inner layer is provided with a plurality of air supply outlets for supplying air to an object to be tested, and the hot air device is connected with the air inlet interlayer, the air supply outlets and the accommodating cavity. The tensile strength testing device can be used for testing the tensile strength of the LED packaging adhesive at different temperatures, and has the advantages of high universality, convenience in operation, high accuracy and good safety performance.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile testing machines, in particular to a tensile testing machine for testing the tensile strength of LED encapsulation glue. Background Art

[0002] In the process of LED production and manufacturing, it is usually necessary to use LED encapsulation glue to encapsulate LED chips, so as to provide physical protection for the LED chips and prevent damage caused by mechanical factors such as vibration and impact. During the R & D process, in order to ensure the reliability and stability of the products during long-term use, technicians usually use a tensile testing machine to test the tensile strength of the LED encapsulation glue, that is, the maximum stress borne by the LED encapsulation glue before breaking during the stretching process. However, the tensile strength of the LED encapsulation glue varies with different temperatures, and there are still certain limitations in the existing tensile testing machines for testing the tensile strength of the LED encapsulation glue at different temperatures, thus affecting the comprehensiveness of the test results. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a tensile testing machine for testing the tensile strength of LED encapsulation glue, which has strong versatility, convenient operation, high accuracy and good safety performance, and can test the tensile strength of the LED encapsulation glue at different temperatures.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] A tensile testing machine for testing the tensile strength of LED encapsulation glue, which comprises a base, a fixed seat, a sliding seat, a driving mechanism, a first clamp, a second clamp, a bellows, a hot air device, a tensile sensor, a controller and an infrared temperature sensor for detecting the temperature of the object to be tested;

[0006] The fixed seat is fixedly connected to the base, and the height direction of the fixed seat is the stretching test direction of the object to be tested; the first clamp is slidably connected to the fixed seat through the sliding seat, and the tensile sensor is fixedly installed on the first clamp; the power output end of the driving mechanism is connected to the sliding seat and can drive the sliding seat, the first clamp and the tensile sensor to move up and down;

[0007] One end of the bellows is hermetically connected to the base, and the other end of the bellows is detachably and hermetically connected to the first clamp; the base, the bellows and the first clamp jointly enclose a containing cavity, the second clamp is arranged in the containing cavity, and the infrared temperature sensor is installed at the upper end of the second clamp;

[0008] The tube body of the corrugated pipe consists of an outer layer and an inner layer, and an air inlet sandwich layer is formed between the outer layer and the inner layer; a plurality of air supply openings for supplying air to the object to be tested are arranged on the inner layer, and the hot air device is connected to the air inlet sandwich layer, the air supply openings and the accommodation cavity;

[0009] The controller is electrically connected to the tensile force sensor and the infrared temperature sensor respectively.

[0010] As a preferred embodiment of the present invention, a plurality of the air supply openings are arranged at each folding part of the inner layer, and the plurality of air supply openings arranged at each folding part of the inner layer are evenly spaced in the circumferential direction.

[0011] As a preferred embodiment of the present invention, the material of the corrugated pipe is a transparent material.

[0012] As a preferred embodiment of the present invention, the corrugated pipe is hermetically connected to the first fixture through a clamp.

[0013] As a preferred embodiment of the present invention, the driving mechanism is a cylinder, the cylinder is installed on the fixed seat, and the push rod of the cylinder is fixedly connected to the sliding seat.

[0014] As a preferred embodiment of the present invention, the hot air device includes a blower, a heater and an air duct, the blower is connected to the air inlet sandwich layer, the air supply openings and the accommodation cavity through the air duct, the heater is arranged on the air duct, and the controller is electrically connected to the blower and the heater respectively.

[0015] As a preferred embodiment of the present invention, the corrugated pipe is further provided with an air outlet connected to the accommodation cavity, and a pressure relief valve is arranged on the air outlet.

[0016] Implementing the tensile testing machine for testing the tensile strength of LED encapsulation glue provided by the present invention, compared with the prior art, its beneficial effects are as follows:

[0017] When the utility model works, both ends of the object to be tested (i.e., LED encapsulation glue) are respectively clamped in the first fixture and the second fixture. Under the action of the driving mechanism, the sliding seat, the first fixture and the tensile force sensor move upward until the object to be tested is broken. The tensile force sensor detects the tensile force value when the object to be tested is broken and feeds the tensile force value back to the controller. At the same time, the hot air device can convey hot air to the accommodating cavity through the air inlet sandwich layer and the air supply port in sequence. The infrared temperature measurement sensor detects the temperature value of the object to be tested arranged in the accommodating cavity and feeds the temperature value back to the controller, so that the tensile strength test results of the object to be tested at different hot air temperatures can be obtained. Secondly, since the corrugated pipe can be folded, it can adapt to the breaking stroke of different objects to be tested, and has strong versatility. Further, since the object to be tested is arranged in the accommodating cavity jointly formed by the base, the corrugated pipe and the first fixture, when the object to be tested is broken instantaneously, the corrugated pipe can play a blocking role, thereby avoiding the object to be tested from popping out when it is broken and causing harm to the test personnel. In addition, the utility model detects the temperature of the object to be tested through the infrared temperature measurement sensor, with fast temperature measurement speed, high accuracy and high sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below.

[0019] Figure 1 is a schematic structural diagram of a tensile testing machine for testing the tensile strength of LED encapsulation glue provided by an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 an enlarged view of area A in the structure shown.

[0021] Markings in the figure:

[0022] 1. Base; 2. Fixed seat; 3. Sliding seat; 4. First fixture; 5. Second fixture; 6. Corrugated pipe; 61. Pipe body; 611. Inner layer; 612. Outer layer; 613. Air inlet sandwich layer; 62. Air supply port; 63. Air outlet; 7. Accommodating cavity; 8. Hot air device; 81. Blower; 82. Heater; 83. Air duct; 9. Infrared temperature measurement sensor; 10. Tensile force sensor; 11. Controller; 12. Clamp; 13. Cylinder; 131. Push rod; 14. Pressure relief valve; 15. Object to be tested. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. It should be understood that the present utility model uses the terms "first", "second", etc. to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information can also be referred to as the "second" information, and similarly, the "second" information can also be referred to as the "first" information.

[0025] Please refer to Figures 1 to 2 , a tensile testing machine for testing the tensile strength of LED encapsulation glue provided by a preferred embodiment of the present utility model includes a base 1, a fixed seat 2, a sliding seat 3, a driving mechanism, a first clamp 4, a second clamp 5, a corrugated pipe 6, a hot air device 8, a tensile force sensor 10, a controller 11, and an infrared temperature sensor for detecting the temperature of the object to be tested 15 (i.e., LED encapsulation glue).

[0026] The fixed seat 2 is fixedly connected to the base 1, and the height direction of the fixed seat 2 is the tensile testing direction of the object to be tested 15; the first clamp 4 is slidably connected to the fixed seat 2 through the sliding seat 3, and the tensile force sensor 10 is fixedly installed on the first clamp 4; the power output end of the driving mechanism is connected to the sliding seat 3 and can drive the sliding seat 3, the first clamp 4, and the tensile force sensor 10 to move up and down.

[0027] One end of the corrugated pipe 6 is hermetically connected to the base 1, and the other end of the corrugated pipe 6 is detachably and hermetically connected to the first clamp 4; the base 1, the corrugated pipe 6, and the first clamp 4 jointly enclose a containing cavity 7, the second clamp 5 is arranged in the containing cavity 7, and the infrared temperature sensor 9 is installed at the upper end of the second clamp 5.

[0028] The pipe body 61 of the corrugated pipe 6 is composed of an outer layer 612 and an inner layer 611; an air inlet sandwich 613 is formed between the outer layer 612 and the inner layer 611; a plurality of air supply ports 63 for supplying air to the object to be tested 15 are arranged on the inner layer 611, and the hot air device 8 is connected to the air inlet sandwich 613, the air supply ports 63, and the containing cavity 7.

[0029] The controller 11 is electrically connected to the tensile force sensor 10 and the infrared temperature sensor 9 respectively.

[0030] It should be noted that, in this embodiment, the driving mechanism is preferably a cylinder 13, the cylinder 13 is installed on the fixed seat 2, and the push rod 131 of the cylinder 13 is fixedly connected to the sliding seat 3. The hot air device 8 includes a blower 81, a heater 82, and an air duct 83. The blower 81 is connected to the air inlet sandwich layer 613, the air outlet 63, and the accommodating cavity 7 through the air duct 83. The heater 82 is arranged on the air duct 83, and the controller 11 is electrically connected to the blower 81 and the heater 82 respectively.

[0031] According to the tensile testing machine for testing the tensile strength of the LED encapsulation glue in this embodiment, during operation, both ends of the object to be tested 15 (i.e., the LED encapsulation glue) are respectively clamped in the first fixture 4 and the second fixture 5. Under the action of the driving mechanism, the sliding seat 3, the first fixture 4, and the tensile force sensor 10 move upward until the object to be tested 15 is broken. The tensile force sensor 10 detects the tensile force value when the object to be tested 15 is broken and feeds the tensile force value back to the controller. At the same time, the hot air device 8 can convey hot air to the accommodating cavity 7 successively through the air inlet sandwich layer 613 and the air outlet 63. The infrared temperature sensor 9 detects the temperature value of the object to be tested 15 arranged in the accommodating cavity 7 and feeds the temperature value back to the controller 11, so that the tensile strength test results of the object to be tested 15 at different hot air temperatures can be obtained. Secondly, since the corrugated pipe 6 can be folded, it can adapt to the breaking stroke of different objects to be tested 15, and has strong versatility. Further, since the object to be tested 15 is arranged in the accommodating cavity 7 jointly enclosed by the base 1, the corrugated pipe 6, and the first fixture 4, when the object to be tested 15 is broken instantaneously, the corrugated pipe 6 can play a blocking role, thereby avoiding the object to be tested 15 from popping out when it is broken and causing harm to the test personnel. In addition, the utility model detects the temperature of the object to be tested through the infrared temperature sensor, with fast temperature measurement speed, high accuracy and sensitivity.

[0032] Exemplarily, a plurality of air outlets 63 are provided at each folding part of the inner layer 611. The plurality of air outlets 63 arranged at the folding parts of the inner layer 611 are evenly spaced in the circumferential direction. Thus, hot air can enter more evenly from the air inlets, further improving the accuracy of the test results.

[0033] Exemplarily, the material of the corrugated pipe 6 is a transparent material. Thus, the situation of the object to be tested 15 inside the corrugated pipe 6 can be visualized, making it more convenient for the test personnel to observe and record.

[0034] Exemplarily, the corrugated pipe 6 is hermetically connected to the first fixture 4 through a clamp 12. With such a design, after one test is completed, it is only necessary to loosen the upper end of the corrugated pipe 6 from the first fixture 4, and then the object to be tested 15 can be taken out for replacement. After reconnecting the first fixture 4 and the corrugated pipe 6 using the clamp 12 again, the next test can be carried out, and the operation is simple and convenient.

[0035] Exemplarily, the corrugated pipe 6 is further provided with an air outlet connected to the accommodating cavity 7, and a pressure relief valve 14 is provided on the air outlet. Thus, when the pressure in the accommodating cavity 7 is greater than the preset value of the pressure relief valve 14, the pressure relief valve 14 will be activated and release the pressure, thereby improving the safety performance during the test process.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A tensile testing machine for testing the tensile strength of LED packaging glue, characterized in that: It includes a base, a fixed seat, a sliding seat, a driving mechanism, a first clamp, a second clamp, a bellows, a hot air device, a tension sensor, a controller, and an infrared temperature sensor for detecting the temperature of the object to be tested; The fixing seat is fixedly connected to the base, and the height direction of the fixing seat is the tensile test direction of the object to be tested; the first clamp is slidably connected to the fixing seat through the sliding seat, and the tension sensor is fixedly installed on the first clamp; the power output end of the driving mechanism is connected to the sliding seat, and can drive the sliding seat, the first clamp and the tension sensor to move up and down; One end of the bellows is sealed and connected to the base, and the other end of the bellows is detachably and sealed and connected to the first fixture; the base, the bellows and the first fixture together enclose a receiving cavity, the second fixture is arranged in the receiving cavity, and the infrared temperature sensor is installed at the upper end of the second fixture; The tube body of the corrugated tube is composed of an outer layer and an inner layer, an air inlet interlayer is formed between the outer layer and the inner layer; the inner layer is provided with a plurality of air supply ports for supplying air to the object to be tested, and the hot air device is connected to the air inlet interlayer, the air supply ports and the accommodating cavity; The controller is electrically connected to the tension sensor and the infrared temperature sensor respectively.

2. The tensile testing machine for testing the tensile strength of LED packaging adhesive according to claim 1, characterized in that: A plurality of air supply ports are provided at each folded portion of the inner layer, and the plurality of air supply ports provided at each folded portion of the inner layer are evenly spaced along the circumferential direction.

3. The tensile testing machine for testing the tensile strength of LED packaging adhesive according to claim 1, characterized in that: The material of the bellows is transparent material.

4. The tensile testing machine for testing the tensile strength of LED packaging adhesive according to claim 1, characterized in that: The bellows is sealed and connected to the first clamp via a clamp.

5. The tensile testing machine for testing the tensile strength of LED packaging adhesive according to claim 1, characterized in that: The driving mechanism is a cylinder, which is mounted on the fixed seat, and a push rod of the cylinder is fixedly connected to the sliding seat.

6. The tensile testing machine for testing the tensile strength of LED packaging adhesive according to claim 1, characterized in that: The hot air device includes a blower, a heater and an air duct. The blower is connected to the air inlet interlayer, the air outlet and the accommodating cavity through the air duct. The heater is arranged on the air duct. The controller is electrically connected to the blower and the heater respectively.

7. The tensile testing machine for testing the tensile strength of LED packaging adhesive according to claim 1, characterized in that: The bellows is also provided with an air outlet connected to the accommodating chamber, and a pressure relief valve is provided on the air outlet.

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