A device and method for testing the strength characteristics of epoxy molding compound

Abstract

The invention discloses an epoxy molding compound strength characteristic testing device and method, belonging to the technical field of semiconductor packaging materials, comprising a base plate for supporting and fixing, the upper wall of the base plate being annularly provided with a plurality of bending strength testing components for bending testing, a driving extrusion component being provided on the base plate, the driving extrusion component being arranged through the base plate, the upper end of the driving extrusion component being arranged in the middle of the plurality of bending strength testing components, the upper wall of the driving extrusion component being provided with an impact strength testing component, the upper wall of the base plate being further provided with a support rod, the upper end of the support rod being installed with a clamping component, the clamping component being arranged at the upper end of the impact strength testing component; the bending strength and impact strength can be tested simultaneously, different strength tests can be performed on the same batch of molding compounds, and the residual particles caused during the detection can be cleaned.

Description

Technical Field

[0001] The invention belongs to the technical field of semiconductor packaging materials, and in particular relates to a device and method for testing the strength characteristics of epoxy molding compounds. Background Art

[0002] In recent years, the demand for electronic products has increased, driving the rapid development of the upstream semiconductor industry. As an important component of electronic components, epoxy molding compound is widely used in chip packaging due to its superior comprehensive performance and low cost. It plays a role in mechanical support and chip protection in electronic components. The mechanical strength of molding compound is one of its important characteristics. There are two main methods for testing the strength characteristics of epoxy molding compound: bending strength test and impact strength test. The existing bending strength test and impact strength test require different testing equipment for testing, and the existing bending strength test device can generally only perform a single-strength bending strength test on epoxy molding compound, and cannot simultaneously test different strengths of the same batch of molding compound, and the existing testing device cannot clean up the residual particles caused by the test. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a device and method for testing the strength characteristics of epoxy molding compound.

[0004] The technical solution adopted by the present invention is as follows: an epoxy molding compound strength characteristic testing device, comprising a base plate for supporting and fixing, the upper wall of the base plate is annularly provided with multiple groups of bending strength testing components for bending testing, a driving extrusion component is provided on the base plate, the driving extrusion component is arranged through the base plate, the upper end of the driving extrusion component is arranged in the middle of the multiple groups of bending strength testing components, the upper wall of the driving extrusion component is provided with an impact strength testing component, the upper wall of the base plate is also provided with a support rod, the upper end of the support rod is installed with a clamping component, and the clamping component is arranged at the upper end of the impact strength testing component.

[0005] Preferably, the driving extrusion assembly includes a hydraulic rod 1 and an exhaust ring, the fixed end of the hydraulic rod 1 is arranged at the lower end of the bottom plate, the exhaust ring is arranged on the upper wall of the bottom plate, the movable end of the hydraulic rod 1 is movably penetrated through the bottom plate, the movable end of the hydraulic rod 1 and the bottom plate are sealed, a connecting plate is installed on the movable end of the hydraulic rod 1, the connecting plate is arranged just above the exhaust ring, a folding bag 1 is installed between the connecting plate and the exhaust ring, the connecting plate, the folding bag 1, the exhaust ring and the bottom plate are sealed, an exhaust hole 1 is provided on the side wall of the exhaust ring, a plurality of exhaust holes 1 are provided, and the plurality of exhaust holes 1 are evenly arranged on the exhaust ring in a ring-shaped manner with equal intervals, after the gas in the folding bag 1 is squeezed, it is discharged from the exhaust hole 1 to clean the bottom plate, and when the hydraulic rod 1 works and drives the connecting plate to move downward, the connecting plate squeezes the folding bag 1, and the gas inside the folding bag 1 is squeezed.

[0006] The bending strength test assembly comprises a support plate 1 and a support plate 2, the lower ends of the support plate 1 and the support plate 2 are both arranged on the upper wall of the bottom plate, the upper end of the support plate 1 is movably provided with a guide pulley, a fixed plate is connected between the support plate 1 and the support plate 2, the side walls of the support plate 1 and the support plate 2 are both provided with a slide groove, a lower moving plate is movably connected in the slide groove, the lower moving plate is arranged at the lower end of the fixed plate, a spring 1 is installed between the fixed plate and the lower moving plate, a connecting rope is installed on the upper wall of the lower moving plate, and the other end of the connecting rope is movably penetrated After passing through the fixed plate, it is wound around the guide pulley and then arranged on the upper wall of the connecting plate. The support plate one and the support plate two are equipped with scale plates, and the scale plates are provided with scales to facilitate observation of the bending degree of the epoxy molding compound. The support plate one and the support plate two are both provided with placement grooves, and the epoxy molding compound to be tested is placed in the placement grooves. A test rod is installed at the center of the bottom wall of the lower plate, and the test rod is arranged at the upper end of the epoxy molding compound; the spring one on the different impact strength test components can use springs with different elastic coefficients to provide different test forces.

[0007] As a preferred embodiment of the present invention, the impact strength testing assembly includes a lifting rod and a telescopic rod, the lower ends of the lifting rod and the telescopic rod are both arranged on the upper wall of the connecting plate, the telescopic rod is provided with two groups, the lifting rod is arranged between the two groups of telescopic rods, the upper end of the telescopic rod is connected with a lifting member, an impact plate is installed at the middle position of the upper wall of the lifting member, a folding bag 2 is installed between the lifting member and the connecting plate, the lifting member, the folding bag 2 and the connecting plate are a sealed space, and a spring 3 is installed between the connecting plate and the lifting member.

[0008] Furthermore, a second card slot and a third card slot are provided at the center of the bottom wall of the lifting member, the second card slot penetrates the center bottom wall of the lifting member, the third card slot is provided in the lifting member, the third card slot is connected to the side wall of the second card slot, a second ventilation pipe is also provided in the lifting member, the second ventilation pipe is connected to the third card slot, a baffle is provided in the second ventilation pipe, a pushing plate is movably installed in the third card slot, a ball is provided on the bottom wall of the pushing plate, the setting of the ball reduces the friction between the pushing plate and the third card slot, a folding bag three is installed between the pushing plate and the baffle, and a sealed space is formed between the pushing plate, the baffle and the folding bag three, an air inlet is provided on the baffle, and the second ventilation pipe is connected to the third folding bag through the air inlet.

[0009] Furthermore, the lifting rod is arranged at the lower end of the second slot, the upper end of the lifting rod is installed with the first slot, the second spring and the insertion rod are installed in the first slot, one end of the second spring is connected to a side wall of the slot, the insertion rod is movably connected in the first slot, the insertion rod is connected to the other end of the second spring, and the insertion rod is matched with the third slot.

[0010] Among them, the lifting member is also provided with a ventilation tube three and a ventilation cavity two, and the inner side wall of the upper end of the lifting member is provided with multiple groups of exhaust holes two for gas circulation, the lower end of the ventilation tube three is through-connected with the folding bag two, the upper end of the ventilation tube three is through-connected with the ventilation cavity two, the exhaust hole two is through-connected with the ventilation cavity two, and a control valve is provided in the ventilation tube three to facilitate the control of gas circulation.

[0011] As a preferred embodiment of the present invention, a ventilation tube is provided in the telescopic rod, a ventilation hole is provided on the upper wall of the connecting plate, a ventilation cavity is provided on the inner wall of the connecting plate, the upper end of the ventilation hole is through-connected with the second folding bag, the lower end of the ventilation hole is through-connected with the first ventilation cavity, the ventilation tube is through-connected with the first ventilation cavity, the ventilation tube is through-connected with the second ventilation tube, and a control valve is provided in the ventilation hole to facilitate the control of the circulation of gas.

[0012] Preferably, the clamping assembly includes a mounting plate, which is connected to the upper end of the support rod, a hydraulic rod 2 is installed at the lower end of the mounting plate, a lower baffle is installed at the movable end of the hydraulic rod 2, and an upper baffle is installed at the upper end of the mounting plate, and the epoxy molding material to be tested is stuck between the lower baffle and the upper baffle.

[0013] The present application discloses a testing method, which is performed by using the testing device as described above, and comprises:

[0014] Fix the epoxy molding compound to be tested by the clamping assembly, and then push the lifting piece downward to connect the lifting rod and the lifting piece;

[0015] Then the hydraulic rod drives the connecting plate to move downward, and when the connecting plate moves downward, the connecting rope drives the lower moving plate to slide upward, and when the spring is compressed, the epoxy molding compound to be tested is stuck in the placement groove;

[0016] At the same time, the connecting plate drives the lifting member to move downward through the lifting rod, the control valve in the ventilation pipe three is opened, and the control valve in the ventilation hole is closed. After the gas in the folding bag two is squeezed, it enters the ventilation pipe three and the ventilation cavity two in turn and is discharged through the exhaust hole two, so as to clean up the residue dropped after the impact on the upper end of the lifting member;

[0017] When the valve moves down to a certain distance, the control valve in the vent pipe 3 is closed, and the control valve in the vent hole is opened. The gas passes through the vent hole, the vent cavity 1, the vent pipe 1, and the vent pipe 2 in sequence and then enters the folding bag 3, driving the pushing plate to push the insertion rod, and the insertion rod retracts into the card slot 2. The spring 3 pushes the lifting member, driving the impact plate to perform an impact test on the epoxy plastic sealing material clamped by the clamping assembly.

[0018] Then the hydraulic rod drives the connecting plate upward, and the spring drives the lower plate to slide downward, and the test rod performs a bending strength test on the epoxy molding compound;

[0019] After the test, the epoxy molding compound is replaced, the broken epoxy molding compound is picked up, and then the hydraulic rod 1 works to drive the connecting plate downward, and the test rod moves upward under the drive of the downward moving plate, and another set of epoxy molding compounds to be tested is stuck in the placement groove. At this time, the connecting plate squeezes the folding bag 1, and the gas is discharged from the exhaust hole 1 to clean the residue on the bottom plate.

[0020] After adopting the above structure, the beneficial effects of the present invention are as follows:

[0021] (1) The springs on the different impact strength test components can use springs with different elastic coefficients, which can provide different test forces, facilitate the simultaneous detection of the bending degree of the epoxy molding compound under different tests, and can adjust the impact strength applied to the epoxy molding compound.

[0022] (2) When the folding bag 1 and the folding bag 2 are squeezed, the gas inside is squeezed out and discharged from the exhaust hole 1 and the exhaust hole 2, so that the residue on the bottom plate and the lifting part can be cleaned by blowing.

[0023] (3) Under the action of spring 2, the insertion rod enters slot 3 from slot 2, and the insertion rod fits the pushing plate to achieve the connection between the lifting rod and the lifting member. Under the action of the pushing plate, the lifting rod and the lifting member can be separated, providing conditions for impact testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0025] Figure 1 A schematic diagram of the structure of a device for testing the strength characteristics of epoxy molding compound proposed by the present invention;

[0026] Figure 2 A front cross-sectional view of a device for testing the strength characteristics of epoxy molding compound proposed by the present invention;

[0027] Figure 3 for Figure 2 A local enlarged view of point A;

[0028] Figure 4 for Figure 2 A local enlarged view of point B;

[0029] Figure 5 for Figure 2 A local enlarged view of point C;

[0030] Figure 6 for Figure 2 A local enlarged view of D;

[0031] Figure 7 A three-dimensional diagram of a device for testing the strength characteristics of epoxy molding compound proposed by the present invention;

[0032] Figure 8 for Figure 7 A local enlarged view of point E;

[0033] Fig. 9 It is a structural schematic diagram of the bending strength testing assembly proposed by the present invention;

[0034] Fig.10 This is a schematic structural diagram of the impact strength testing assembly proposed in the present invention.

[0035] In the attached drawings: 1, bottom plate, 2, bending strength test assembly, 3, drive extrusion assembly, 4, impact strength test assembly, 5, support rod, 6, clamping assembly, 7, hydraulic rod 1, 8, exhaust ring, 9, connecting plate, 10, folding bag 1, 11, exhaust hole 1, 12, support plate 1, 13, support plate 2, 14, guide pulley, 15, fixed plate, 16, slide groove, 17, lower plate, 18, spring 1, 19, connecting rope, 20, scale plate, 21, placement groove, 22, test rod, 23, lifting rod, 24, Telescopic rod, 25, lifting member, 26, impact plate, 27, folding bag two, 28, spring three, 29, slot two, 30, slot three, 31, vent pipe two, 32, baffle, 33, pushing plate, 34, folding bag three, 35, air inlet, 36, slot one, 37, spring two, 38, plug rod, 39, vent pipe three, 40, ventilation cavity two, 41, exhaust hole two, 42, ventilation pipe one, 43, ventilation hole, 44, mounting plate, 45, hydraulic rod two, 46, lower baffle, 47, upper baffle, 48, ventilation cavity one. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] like Figure 1-Figure 10As shown, a device for testing the strength characteristics of epoxy molding compound comprises a base plate 1 for supporting and fixing, the upper wall of the base plate 1 is provided with a plurality of groups of bending strength testing components 2 for bending testing in a ring shape, a driving extrusion component 3 is provided on the base plate 1, the driving extrusion component 3 is arranged through the base plate 1, the upper end of the driving extrusion component 3 is arranged in the middle of the plurality of groups of bending strength testing components 2, the upper wall of the driving extrusion component 3 is provided with an impact strength testing component 4, the upper wall of the base plate 1 is also provided with a support rod 5, the upper end of the support rod 5 is installed with a clamping component 6, and the clamping component 6 is arranged at the upper end of the impact strength testing component 4.

[0039] The driving extrusion assembly 3 includes a hydraulic rod 7 and an exhaust ring 8. The fixed end of the hydraulic rod 7 is arranged at the lower end of the bottom plate 1, and the exhaust ring 8 is arranged on the upper wall of the bottom plate 1. The movable end of the hydraulic rod 7 is movably arranged to penetrate the bottom plate 1. The movable end of the hydraulic rod 7 and the bottom plate 1 are sealed. A connecting plate 9 is installed on the movable end of the hydraulic rod 7. The connecting plate 9 is arranged just above the exhaust ring 8. A folding bag 10 is installed between the connecting plate 9 and the exhaust ring 8. The connecting plate 9. The folding bag 10, the exhaust ring 8 and the bottom plate 1 are sealed and connected. The exhaust ring 8 has a side wall with an exhaust hole 11. The exhaust hole 11 has multiple groups. The multiple groups of exhaust holes 11 are evenly arranged on the exhaust ring 8 in a ring shape with equal intervals. After the gas in the folding bag 10 is squeezed, it is discharged from the exhaust hole 11 to clean the bottom plate 1. When the hydraulic rod 7 works to drive the connecting plate 9 to move downward, the connecting plate 9 squeezes the folding bag 10, and the gas inside the folding bag 10 is squeezed.

[0040] The bending strength testing assembly 2 includes a support plate 12 and a support plate 2 13, the lower ends of the support plate 12 and the support plate 2 13 are both arranged on the upper wall of the bottom plate 1, the upper end of the support plate 12 is movably provided with a guide pulley 14, a fixed plate 15 is connected between the support plate 12 and the support plate 2 13, the side walls of the support plate 12 and the support plate 2 13 are both provided with a slide groove 16, a downward plate 17 is movably connected in the slide groove 16, the downward plate 17 is arranged at the lower end of the fixed plate 15, a spring 18 is installed between the fixed plate 15 and the downward plate 17, a connecting rope 19 is installed on the upper wall of the downward plate 17, and the connecting rope 19 The other end movably passes through the fixed plate 15 and then is wound around the guide pulley 14, and then is arranged on the upper wall of the connecting plate 9. The support plate 1 12 and the support plate 2 13 are equipped with a scale plate 20, and the scale plate 20 is provided with a scale to facilitate the observation of the bending degree of the epoxy molding compound. The support plate 1 12 and the support plate 2 13 are both provided with a placement groove 21, and the epoxy molding compound to be tested is placed in the placement groove 21. A test rod 22 is installed at the center of the bottom wall of the lower moving plate 17, and the test rod 22 is arranged at the upper end of the epoxy molding compound; the spring 18 on the different impact strength test components 4 can use springs with different elastic coefficients, which can provide different test strengths;

[0041] It should be noted that when the connecting plate 9 moves downward, it drives the connecting rope 19 to move, and the connecting rope 19 slides along the guide pulley 14, driving the lower plate 17 to slide upward along the slide groove 16, and the lower plate 17 squeezes the spring 18, and the spring 18 is compressed. The test rod 22 moves upward under the drive of the lower plate 17, and the epoxy molding compound to be tested is stuck in the placement groove 21. At this time, the upper wall of the epoxy molding compound is placed in contact with the lower end of the test rod 22, and then the connecting plate 9 moves upward, the connecting rope 19 is in a relaxed state, and the spring 18 drives the lower plate 17 to slide downward along the slide groove 16, and the lower plate 17 drives the test rod 22 to move downward. The test rod 22 performs a bending strength test on the epoxy molding compound. The spring 18 with different spring coefficients has different extrusion forces on the lower plate 17, and can apply different test forces to the epoxy molding compound.

[0042] The impact strength testing assembly 4 includes a lifting rod 23 and a telescopic rod 24, the lower ends of which are both arranged on the upper wall of the connecting plate 9, and the telescopic rod 24 is provided with two groups, and the lifting rod 23 is arranged between the two groups of telescopic rods 24, and the upper end of the telescopic rod 24 is connected with a lifting member 25, and an impact plate 26 is installed at the middle position of the upper wall of the lifting member 25, and a folding capsule 27 is installed between the lifting member 25 and the connecting plate 9, and a sealed space is formed between the lifting member 25, the folding capsule 27 and the connecting plate 9, and a spring 3 28 is installed between the connecting plate 9 and the lifting member 25.

[0043] In this embodiment, a second card slot 29 and a third card slot 30 are provided at the center of the bottom wall of the lifting member 25. The second card slot 29 runs through the center bottom wall of the lifting member 25. The third card slot 30 is provided in the lifting member 25. The third card slot 30 is connected to the side wall of the second card slot 29. A second vent pipe 31 is also provided in the lifting member 25. The second vent pipe 31 is connected to the third card slot 30. A baffle plate 32 is provided in the second vent pipe 31. A pushing plate 33 is movably installed in the third card slot 30. A ball is provided on the bottom wall of the pushing plate 33. The setting of the ball reduces the friction between the pushing plate 33 and the card slot. The friction force between the groove three 30, a folding bag three 34 is installed between the pushing plate 33 and the baffle plate 32, and there is a sealed space between the pushing plate 33, the baffle plate 32 and the folding bag three 34. An air inlet hole 35 is provided on the baffle plate 32, and the ventilation pipe two 31 is connected with the folding bag three 34 through the air inlet hole 35; the gas in the ventilation pipe two 31 enters the folding bag three 34 through the air inlet hole 35, and the folding bag three 34 bulges to push the pushing plate 33, so that the pushing plate 33 moves along the slot three 30 to the direction of the slot two 29.

[0044] The lifting rod 23 is arranged at the lower end of the second card slot 29, and the upper end of the lifting rod 23 is installed with a card slot 1 36, and a spring 2 37 and a plug rod 38 are installed in the card slot 1 36. One end of the spring 2 37 is connected to the side wall of the card slot 1 36, and the plug rod 38 is movably connected in the card slot 1 36. The plug rod 38 is connected to the other end of the spring 2 37, and the plug rod 38 is matched with the card slot 3 30;

[0045] It should be noted that when the lifting rod 23 drives the insertion rod 38 to be inserted into the second slot 29, the second slot 29 squeezes the insertion rod 38, and the insertion rod 38 squeezes the spring second 37. As the lifting rod 23 continues to be inserted, the insertion rod 38 moves to the position of the third slot 30. Under the action of the spring second 37, the insertion rod 38 enters the third slot 30 from the second slot 29. The insertion rod 38 is arranged in contact with the pushing plate 33 to realize the connection between the lifting rod 23 and the lifting member 25.

[0046] A ventilation pipe three 39 and a ventilation cavity two 40 are also provided in the lifting member 25. A plurality of exhaust holes two 41 for gas circulation are provided on the inner side wall of the upper end of the lifting member 25. The lower end of the ventilation pipe three 39 is through-connected with the folding bag two 27, the upper end of the ventilation pipe three 39 is through-connected with the ventilation cavity two 40, the exhaust holes two 41 are through-connected with the ventilation cavity two 40, and a control valve is provided in the ventilation pipe three 39 to control the circulation of gas. After the gas in the folding bag two 27 is squeezed, the gas enters the ventilation pipe three 39 and the ventilation cavity two 40 in turn and is discharged through the exhaust holes two 41.

[0047] It should be noted that a vent pipe 42 is provided in the telescopic rod 24, a vent hole 43 is provided on the upper wall of the connecting plate 9, a vent cavity 48 is provided on the inner wall of the connecting plate 9, the upper end of the vent hole 43 is connected with the folding bag 27, the lower end of the vent hole 43 is connected with the vent cavity 48, the vent pipe 42 is connected with the vent cavity 48, the vent pipe 42 is connected with the vent pipe 2 31, and a control valve is provided in the vent hole 43 to control the flow of gas; after the gas in the folding bag 27 is squeezed, it enters the vent cavity 48 through the vent hole 43, and enters the vent pipe 42 from the vent cavity 48, and then enters the vent pipe 2 31.

[0048] In this embodiment, the clamping assembly 6 includes a mounting plate 44, which is connected to the upper end of the support rod 5. A hydraulic rod 45 is installed at the lower end of the mounting plate 44, and a lower baffle 46 is installed at the movable end of the hydraulic rod 45. An upper baffle 47 is installed at the upper end of the mounting plate 44. The epoxy molding material to be tested is stuck between the lower baffle 46 and the upper baffle 47. The hydraulic rod 45 works to push the lower baffle 46 upward, so that the lower baffle 46 and the upper baffle 47 clamp and fix the epoxy molding material. The clamped and fixed epoxy molding material is arranged at the upper end of the impact plate 26 to facilitate the impact plate 26 to impact it.

[0049] The present application discloses a testing method, which is performed by using the testing device described above. The specific operation of the method is as follows:

[0050] First, the epoxy molding compound to be tested is clamped between the lower baffle plate 46 and the upper baffle plate 47, and the hydraulic rod 245 works to push the lower baffle plate 46 upward, so that the lower baffle plate 46 and the upper baffle plate 47 clamp and fix the epoxy molding compound, and the clamped epoxy molding compound is arranged at the upper end of the impact plate 26, so that the impact plate 26 can impact it, and then the lifting member 25 is manually pushed downward, and the lifting rod 23 drives the insertion rod 38 to be inserted into the second card slot 29, and the second card slot 29 squeezes the insertion rod 38, and the insertion rod 38 squeezes the second spring 37. As the lifting member 25 continues to move downward, when the insertion rod 38 moves to the position of the third card slot 30, the insertion rod 38 enters the third card slot 30 from the second card slot 29 under the action of the second spring 37, and the insertion rod 38 is arranged in abutment with the pushing plate 33, so as to realize the connection between the lifting rod 23 and the lifting member 25, and then the external force is withdrawn;

[0051] At this time, the hydraulic rod 17 works to drive the connecting plate 9 to move downward, and when the connecting plate 9 moves downward, it drives the connecting rope 19 to move, and the connecting rope 19 slides along the guide pulley 14, driving the lower plate 17 to slide upward along the slide groove 16, and the lower plate 17 squeezes the spring 18, and the spring 18 is compressed, and the test rod 22 moves upward under the drive of the lower plate 17, and the epoxy molding compound to be tested is stuck in the placement groove 21, and the upper wall of the epoxy molding compound is placed in contact with the lower end of the test rod 22;

[0052] At the same time, the connecting plate 9 drives the lifting member 25 to move downward through the lifting rod 23, and the lifting member 25 squeezes the folding bag 27. The spring 3 28 is in a compressed state, the control valve in the ventilation pipe 3 39 is opened, and the control valve in the ventilation hole 43 is closed. After the gas in the folding bag 27 is squeezed, the gas enters the ventilation pipe 3 39 and the ventilation cavity 2 40 in turn and is discharged through the exhaust hole 2 41, and the residue dropped after the impact on the upper end of the lifting member 25 is cleaned. When it moves down to a certain distance, the epoxy molding compound can be impact tested, the control valve in the ventilation pipe 3 39 is closed, and the control valve in the ventilation hole 43 is opened, and the gas in the folding bag 27 is squeezed and enters the ventilation cavity 1 48 through the ventilation hole 43. The gas in the vent pipe 31 enters the folding bag 34 through the air inlet 35. The folding bag 34 swells to push the pushing plate 33, so that the pushing plate 33 moves along the card slot 30 toward the card slot 29. The pushing plate 33 drives the insertion rod 38, and the insertion rod 38 retracts into the card slot 29. The spring 3 28 pushes the lifting member 25, and the lifting member 25 is lifted rapidly, driving the impact plate 26 to perform an impact test on the epoxy molding compound clamped by the clamping assembly 6. The spring 3 28 with different spring coefficients has different pushing forces on the impact plate 26, and can apply different test forces to the epoxy molding compound.

[0053] Then the hydraulic rod 7 works to drive the connecting plate 9 to move upward, the connecting rope 19 is in a relaxed state, the spring 18 drives the lower plate 17 to slide downward along the slide groove 16, the lower plate 17 drives the test rod 22 to move downward, and the test rod 22 performs a bending strength test on the epoxy molding compound. The spring 18 with different spring coefficients has different squeezing forces on the lower plate 17, and can apply different test forces to the epoxy molding compound. The degree of bending of the epoxy molding compound can be observed through the scale on the scale plate 20.

[0054] After the test is completed, the epoxy molding compound is replaced, and the broken epoxy molding compound is picked up. Then, the hydraulic rod 7 works to drive the connecting plate 9 to move downward, and the test rod 22 moves upward under the drive of the downward plate 17, and another group of epoxy molding compounds that need to be tested is stuck in the placement groove 21. When the hydraulic rod 7 works to drive the connecting plate 9 to move downward, the connecting plate 9 squeezes the folding capsule 10, and the gas inside the folding capsule 10 is squeezed and discharged from the exhaust hole 11, and the residue on the bottom plate 1 is blown clean.

[0055] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents. In short, if those skilled in the art are inspired by them and design structural modes and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they shall all fall within the scope of protection of the present invention.

Claims

1. An epoxy molding compound strength characteristic testing device, comprising a base plate for supporting and fixing, characterized in that: The upper wall of the bottom plate is annularly provided with a plurality of bending strength test assemblies for bending test, the bottom plate is provided with a driving extrusion assembly, the driving extrusion assembly is arranged through the bottom plate, the upper end of the driving extrusion assembly is arranged in the middle of the plurality of bending strength test assemblies, the upper wall of the driving extrusion assembly is provided with an impact strength test assembly, the upper wall of the bottom plate is also provided with a support rod, the upper end of the support rod is installed with a clamping assembly, and the clamping assembly is arranged at the upper end of the impact strength test assembly; The driving extrusion assembly comprises a hydraulic rod 1 and an exhaust ring, wherein the fixed end of the hydraulic rod 1 is arranged at the lower end of the bottom plate, the exhaust ring is arranged on the upper wall of the bottom plate, the movable end of the hydraulic rod 1 is movably arranged through the bottom plate, a connecting plate is installed on the movable end of the hydraulic rod 1, the connecting plate is arranged at the upper end of the exhaust ring, a folding bag 1 is installed between the connecting plate and the exhaust ring, and an exhaust hole 1 is arranged on the side wall of the exhaust ring, and the exhaust hole 1 is provided in a plurality of groups, and the plurality of exhaust holes 1 are evenly arranged on the exhaust ring in a ring shape at equal intervals; The cam is provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels respectively. The impact strength testing assembly includes a lifting rod and a telescopic rod, the lower ends of which are both arranged on the upper wall of the connecting plate, the telescopic rod is provided with two groups, the lifting rod is arranged between the two groups of telescopic rods, the upper end of the telescopic rod is connected to a lifting member, an impact plate is installed at the middle position of the upper wall of the lifting member, a folding bag 2 is installed between the lifting member and the connecting plate, and a spring 3 is installed between the connecting plate and the lifting member.

2. The epoxy molding compound strength characteristic testing device according to claim 1, characterized in that: A second card slot and a third card slot are provided at the center of the bottom wall of the lifting member, the second card slot penetrates the bottom wall of the lifting member at the center, the third card slot is provided in the lifting member, the third card slot is through-connected with the side wall of the second card slot, a second ventilation pipe is also provided in the lifting member, the second ventilation pipe is through-connected with the third card slot, a baffle is provided in the second ventilation pipe, a pushing plate is movably installed in the third card slot, a ball is provided on the bottom wall of the pushing plate, a folding bag three is installed between the pushing plate and the baffle, an air inlet is provided on the baffle, and the second ventilation pipe is through-connected with the third folding bag through the air inlet.

3. The epoxy molding compound strength characteristic testing device according to claim 2, characterized in that: The lifting rod is arranged at the lower end of the second slot, and the upper end of the lifting rod is installed with the first slot. The second spring and the insertion rod are installed in the first slot. One end of the second spring is connected to a side wall of the slot, and the insertion rod is movably connected in the first slot. The insertion rod is connected to the other end of the second spring, and the insertion rod is matched with the third slot.

4. The epoxy molding compound strength characteristic testing device according to claim 3, characterized in that: A ventilation tube three and a ventilation cavity two are also provided in the lifting member. A plurality of exhaust holes two for gas circulation are provided on the inner side wall of the upper end of the lifting member. The lower end of the ventilation tube three is connected through the folding bag two, the upper end of the ventilation tube three is connected through the ventilation cavity two, the exhaust hole two is connected through the ventilation cavity two, and a control valve is provided in the ventilation tube three.

5. The epoxy molding compound strength characteristic testing device according to claim 4, characterized in that: A ventilation pipe is provided in the telescopic rod, a ventilation hole is provided on the upper wall of the connecting plate, a ventilation cavity is provided on the inner wall of the connecting plate, the upper end of the ventilation hole is connected to the second folding bag, the lower end of the ventilation hole is connected to the first ventilation cavity, the ventilation pipe is connected to the first ventilation cavity, the ventilation pipe is connected to the second ventilation pipe, and a control valve is provided in the ventilation hole.

6. The epoxy molding compound strength characteristic testing device according to claim 5, characterized in that: The clamping assembly includes a mounting plate, which is connected to the upper end of the support rod, a hydraulic rod 2 is installed at the lower end of the mounting plate, a lower baffle is installed at the movable end of the hydraulic rod 2, and an upper baffle is installed at the upper end of the mounting plate.

7. A testing method, characterized in that: The testing method is performed using the testing device according to claim 6, and the method comprises: Fix the epoxy molding compound to be tested by the clamping assembly, and then push the lifting piece downward to connect the lifting rod and the lifting piece; Then the hydraulic rod drives the connecting plate to move downward, and when the connecting plate moves downward, the connecting rope drives the lower moving plate to slide upward, and when the spring is compressed, the epoxy molding compound to be tested is stuck in the placement groove; At the same time, the connecting plate drives the lifting member to move downward through the lifting rod, the control valve in the ventilation pipe three is opened, and the control valve in the ventilation hole is closed. After the gas in the folding bag two is squeezed, it enters the ventilation pipe three and the ventilation cavity two in turn and is discharged through the exhaust hole two, so as to clean up the residue dropped after the impact on the upper end of the lifting member; When the valve moves down to a certain distance, the control valve in the vent pipe 3 is closed, and the control valve in the vent hole is opened. The gas passes through the vent hole, the vent cavity 1, the vent pipe 1, and the vent pipe 2 in sequence and then enters the folding bag 3, driving the pushing plate to push the insertion rod, and the insertion rod retracts into the card slot 2. The spring 3 pushes the lifting member, driving the impact plate to perform an impact test on the epoxy plastic sealing material clamped by the clamping assembly. Then the hydraulic rod drives the connecting plate upward, and the spring drives the lower plate to slide downward, and the test rod performs a bending strength test on the epoxy molding compound; After the test, the epoxy molding compound is replaced, the broken epoxy molding compound is picked up, and then the hydraulic rod 1 works to drive the connecting plate downward, and the test rod moves upward under the drive of the downward moving plate, and another set of epoxy molding compounds to be tested is stuck in the placement groove. At this time, the connecting plate squeezes the folding bag 1, and the gas is discharged from the exhaust hole 1 to clean the residue on the bottom plate.

Images