Testing die for hot hardness and flash

Abstract

The utility model discloses a hot hardness and flash testing mold which comprises a top component and a bottom component which are stacked with each other and are detachably connected with each other, the top assembly comprises a main body part; a glue injection port is formed in the middle of the main body part; the bottom assembly comprises a testing part, the testing part comprises a flash testing area and a hardness testing area, and a molding compound flowing area is arranged between the flash testing area and the hardness testing area. According to the utility model, different functional areas are divided in the mold, so that a hardness test block and a flash test block can be simultaneously formed in one injection molding process of a sample, the sample preparation requirements of the hardness test and the flash test are simultaneously met, the experimental period and the test cost are effectively reduced, and the consistency of test results is improved; the circle center of the glue injection opening coincides with the symmetric center of the plastic package material flowing area, the problem of local pressure concentration caused by bias flow is avoided, the risk of material overflow can be reduced, the diameter of the glue injection opening is optimized, shearing heat is effectively reduced, and the pressure maintaining effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of test mold technology, specifically to a test mold for hot hardness and flash. Background Technology

[0002] Epoxy Molding Compound (EMC) is a powdered molding compound made from epoxy resin as the base resin, high-performance phenolic resin as the curing agent, silica powder and other fillers, and various additives. Over 90% of plastic encapsulation (molding) materials use EMC. The molding process involves extruding EMC into a mold cavity using transfer molding to embed the semiconductor chip, while simultaneously cross-linking and curing to form a semiconductor device with a specific structural shape.

[0003] In the current process of testing the thermal hardness and flash performance of epoxy molding compounds for electronic packaging, two different molds are required to prepare samples twice before testing the thermal hardness and flash performance of the samples. This results in a long experimental cycle and high testing costs. Furthermore, different preparation processes may lead to differences in microstructure or performance, affecting the consistency of test results. Utility Model Content

[0004] The purpose of this utility model is to provide a test mold for hot hardness and flash in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] A top component and a bottom component stacked on top of each other, wherein the top component and the bottom component are detachably connected;

[0007] The top component includes a main body, and an injection port is provided in the middle of the main body;

[0008] The bottom component includes a testing section, which includes a flash testing area and a hardness testing area, with a molding compound flow area provided between the flash testing area and the hardness testing area.

[0009] As a further description of the above technical solution, the center of the injection port and the center of symmetry of the molding compound flow area coincide.

[0010] As a further description of the above technical solution, the flash test area is provided with flash test block forming grooves, and scale lines are drawn between the flash test block forming grooves.

[0011] As a further description of the above technical solution, one end of the flash test block forming groove is attached to the edge of the molding compound flow area, and the other end of the flash test block forming groove is attached to the edge of the main body.

[0012] As a further description of the above technical solution, the hardness testing area is provided with a hardness testing block forming groove, and a guide groove is connected between the hardness testing block forming groove and the molding compound flow area.

[0013] As a further description of the above technical solution, the guide channel is inclined along the edge of the molding compound flow area toward the hardness test block forming groove.

[0014] As a further description of the above technical solution, a first positioning hole is provided on one side of the top of the main body, a third positioning hole is provided on the other side of the bottom of the main body, a second positioning hole is provided on one side of the top of the test part, and a fourth positioning hole is provided on the other side of the bottom of the test part.

[0015] As a further description of the above technical solution, the first positioning hole and the second positioning hole share the same center and have the same diameter. The third positioning hole and the fourth positioning hole also share the same center and have the same diameter.

[0016] As a further description of the above technical solution, the first positioning hole and the third positioning hole have different diameters, and the second positioning hole and the fourth positioning hole have different diameters.

[0017] As a further description of the above technical solution, the main body is provided with first fixing holes symmetrically on both sides of the side, and the test part is provided with second fixing holes symmetrically on the top and bottom.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model designs a multifunctional mold, which is divided into different functional areas to ensure that the sample can simultaneously form a hardness test block and a flash test block in a single injection molding process, thereby meeting the sample preparation requirements for both hardness testing and flash testing, effectively reducing the experimental cycle and testing cost, and improving the consistency of test results.

[0020] 2. In this invention, the center of the injection port and the symmetrical center of the molding compound flow area coincide, which avoids the problem of local pressure concentration caused by flow deviation, reduces the risk of overflow, and the injection port diameter is optimized, which effectively reduces shear heat and improves the pressure holding effect.

[0021] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a top view of the top component of this utility model;

[0023] Figure 2 This is a side view of the top component of this utility model;

[0024] Figure 3 This is a top view of the bottom component of this utility model;

[0025] Figure 4 This is a side view of the bottom component of this utility model.

[0026] Figure label:

[0027] 1. Top assembly; 11. Main body; 12. Injection port; 13. First positioning hole; 14. Third positioning hole; 15. First fixing hole; 2. Bottom assembly; 21. Testing section; 211. Flash test area; 2111. Flash test block forming groove; 2112. Scale line; 212. Hardness test area; 2121. Hardness test block forming groove; 2122. Guide groove; 213. Molding material flow area; 22. Second positioning hole; 23. Fourth positioning hole; 24. Second positioning hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0029] like Figures 1-4 As shown, in one embodiment, a test mold for heat hardness and flash includes: a top component 1 and a bottom component 2 stacked on top of each other, and the top component 1 and the bottom component 2 are detachably connected.

[0030] The top component 1 includes a main body 11, with a glue injection port 12 located in the center of the main body 11. The center of the glue injection port 12 coincides with the center of symmetry of the molding compound flow area 213, avoiding the problem of local pressure concentration caused by flow deviation, improving the uniformity and stability of the molding compound flow in the mold, and effectively reducing the risk of overflow. In addition, the diameter of the glue injection port 12 in this application has been optimized (e.g., Figure 1 As shown, the injection port 12 has a frustum-shaped cross-section with a top diameter of 0.54 mm and a bottom diameter of 0.26 mm. This effectively reduces shear heat during injection (shear heat increases the temperature of the melt, which may cause changes in material properties such as flowability and viscosity, and even affect the quality of the final product), and improves the pressure holding effect (in the later stages of injection molding, maintaining a certain pressure prevents the melt from shrinking during cooling and causing porosity, shrinkage marks, or deformation. A good pressure holding effect ensures that the plastic melt fully fills the mold, improves the density and surface quality of the product, and reduces the risk of flash and overflow).

[0031] Furthermore, the bottom component 2 includes a testing section 21, which is divided into a flash testing area 211 and a hardness testing area 212, and a molding compound flow area 213 is provided between the flash testing area 211 and the hardness testing area 212.

[0032] It should be explained in detail that the flash test area 211 is provided with flash test block forming grooves 2111, and corresponding scale lines 2112 are sequentially marked between the flash test block forming grooves 2111. Specifically, one end of the flash test block forming groove 2111 is attached to the edge of the molding compound flow area 213, while the other end is attached to the edge of the main body 11, so that the raw material in the molding compound flow area 213 flows into the flash test block forming groove 2111 to form flash test blocks for testing. Specifically, the spacing between each dimension in the flash test area 211 (e.g., ...) Figure 1 As shown, the values ​​are 0.00025 inch, 0.0005 inch, 0.001 inch, 0.002 inch, and 0.003 inch, respectively. Adjusting these values ​​can reduce the weight of the mold itself and make it easier for testers to operate.

[0033] Furthermore, the hardness testing area 212 is provided with a hardness test block forming groove 2121, and a guide groove 2122 connects the hardness test block forming groove 2121 and the molding compound flow area 213. Specifically, the guide groove 2122 is inclined along the edge of the molding compound flow area 213 toward the hardness test block forming groove 2121, so that the raw material in the molding compound flow area 213 flows into the hardness test block forming groove 2121 through the guide groove 2122 to form a hardness test block for testing.

[0034] Please continue reading. Figures 1-4 In this embodiment, a first positioning hole 13 is provided on one side of the top of the main body 11 of the top component 1, and a third positioning hole 14 is provided on the other side of the bottom of the main body 11; correspondingly, a second positioning hole 22 is provided on one side of the top of the test part 21 of the bottom component 2, and a fourth positioning hole 23 is provided on the other side of the bottom of the test part 21, so that the top component 1 and the bottom component 2 can be assembled together by connecting parts such as screws and bolts.

[0035] It should be explained in detail that the first positioning hole 13 and the second positioning hole 22 share the same center and have the same diameter. The third positioning hole 14 and the fourth positioning hole 23 also share the same center and have the same diameter. This ensures that during the mold assembly process, the top component 1 and the bottom component 2 can achieve precise concentric docking at the top position, which greatly improves the accuracy and stability of the assembly.

[0036] For example, the first positioning hole 13 and the third positioning hole 14 have different diameters, and the second positioning hole 22 and the fourth positioning hole 23 have different diameters. When assembling the mold, the operator can quickly and accurately determine the corresponding position of the top component 1 and the bottom component 2 based on the difference in the diameter of the positioning holes, avoiding assembly errors caused by incorrect orientation or component confusion, thereby improving assembly efficiency and ensuring the correct assembly of the mold.

[0037] Furthermore, the main body 11 has symmetrically provided first fixing holes 15 on both sides, and the test part 21 has symmetrically provided second fixing holes 24 on the top and bottom. By installing suitable fasteners, such as bolts and screws, in the first fixing holes 15 and the second fixing holes, the top component 1 and the bottom component 2 can be firmly connected together.

[0038] Through the above technical solution, this application divides different functional areas in the mold to ensure that the sample can simultaneously form a hardness test block and a flash test block in one injection molding process, thereby simultaneously meeting the sample preparation requirements for hardness testing and flash testing, effectively reducing the experimental cycle and testing cost, and improving the consistency of test results; the center of the injection port 12 coincides with the symmetrical center of the molding compound flow area 213, avoiding the problem of local pressure concentration caused by flow deviation, reducing the risk of overflow, and the diameter of the injection port 12 has been optimized to effectively reduce shear heat and improve the pressure holding effect.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test mold for hot hardness and flash, characterized in that, include: A top component (1) and a bottom component (2) are stacked on top of each other, and the top component (1) and the bottom component (2) are detachably connected; The top component (1) includes a main body (11), and a glue injection port (12) is provided in the middle of the main body (11); The bottom component (2) includes a testing section (21), which includes a flash testing area (211) and a hardness testing area (212). A molding compound flow area (213) is provided between the flash testing area (211) and the hardness testing area (212).

2. The test mold for hot hardness and flash according to claim 1, characterized in that, The center of the injection port (12) coincides with the center of symmetry of the molding compound flow area (213).

3. The test mold for hot hardness and flash according to claim 1, characterized in that, The flash test area (211) is provided with flash test block forming grooves (2111), and scale lines (2112) are drawn between the flash test block forming grooves (2111).

4. The test mold for hot hardness and flash according to claim 3, characterized in that, One end of the flash test block forming groove (2111) is attached to the edge of the molding material flow area (213), and the other end of the flash test block forming groove (2111) is attached to the edge of the main body (11).

5. The test mold for hot hardness and flash according to claim 1, characterized in that, The hardness testing area (212) is provided with a hardness testing block forming groove (2121), and a guide groove (2122) is connected between the hardness testing block forming groove (2121) and the molding compound flow area (213).

6. The test mold for hot hardness and flash according to claim 5, characterized in that, The flow channel (2122) is inclined along the edge of the molding compound flow area (213) toward the hardness test block forming groove (2121).

7. The test mold for hot hardness and flash according to claim 1, characterized in that, The main body (11) has a first positioning hole (13) on one side of its top, a third positioning hole (14) on the other side of its bottom, a second positioning hole (22) on one side of its top, and a fourth positioning hole (23) on the other side of its bottom.

8. The test mold for hot hardness and flash according to claim 7, characterized in that, The first positioning hole (13) and the second positioning hole (22) share the same center and have the same diameter. The third positioning hole (14) and the fourth positioning hole (23) share the same center and have the same diameter.

9. The test mold for hot hardness and flash according to claim 7, characterized in that, The first positioning hole (13) and the third positioning hole (14) have different diameters, and the second positioning hole (22) and the fourth positioning hole (23) have different diameters.

10. The test mold for hot hardness and flash according to claim 1, characterized in that, The main body (11) has first fixing holes (15) symmetrically opened on both sides of its side, and the test part (21) has second fixing holes (24) symmetrically opened on its top and bottom.

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