Mold for testing molding shrinkage performance of epoxy molding compound

Abstract

The utility model discloses a mold for testing the molding shrinkage performance of an epoxy molding compound. The mold comprises a mold main body, the injection molding hole is formed in the mold main body; and the plurality of sample grooves are formed in the mold main body, and the sample grooves are connected with the injection molding holes through runners. According to the utility model, the recesses at the two ends can be used as measurement references, that is, the caliper is clamped at the two recesses, the measurement position is fixed, the difference of personnel operation is reduced, and the measurement accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing molds, in particular to a mold for testing the molding shrinkage performance of epoxy plastic packaging materials. Background Art

[0002] Epoxy molding compound is a commonly used packaging material, mainly used in electronic components, circuit boards, cable connectors and other fields. It is composed of epoxy resin and curing agent, has excellent insulation performance, chemical corrosion resistance and high temperature resistance, and can effectively protect electronic components from environmental factors.

[0003] Before mass production of epoxy molding compounds, samples need to be prepared and then the molding shrinkage of the epoxy molding compound samples needs to be tested. However, the molds currently used to make epoxy molding compound samples can only prepare one sample at a time. At the same time, due to the differences in the fluidity of the samples, the end of the sample with poor fluidity may not be fully injected, affecting the success rate of sample preparation and test accuracy. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a mold for testing the shrinkage performance of epoxy molding materials.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] A mold for testing the shrinkage performance of epoxy molding compound, comprising:

[0007] Mold body;

[0008] An injection hole is provided in the mold body;

[0009] A plurality of sample grooves are provided in the mold body, and the sample grooves are connected to the injection holes through flow channels.

[0010] As a further description of the above technical solution, protrusions are integrally formed at both ends of the sample slot.

[0011] As a further description of the above technical solution, the mold body, the injection hole, the sample groove, the flow channel and the protrusion are formed as an integrated structure.

[0012] As a further description of the above technical solution, an exhaust groove is provided at the bottom of the mold body, and the exhaust groove is connected to the bottom of the sample groove.

[0013] As a further description of the above technical solution, the length of the sample groove is 120 mm, the length of the protrusion is 5 mm, the width of the injection hole is 16 mm, and the length of the flow channel is 13 mm.

[0014] As a further description of the above technical solution, four sample slots are provided, and every two sample slots are symmetrically arranged around the injection hole.

[0015] As a further description of the above technical solution, the sample slot is a rectangular structure, and the protrusions are arranged on two short sides of the sample slot facing each other.

[0016] As a further description of the above technical solution, the protrusions are symmetrically arranged at both ends of the sample groove.

[0017] As a further description of the above technical solution, the length of the mold body is 348 mm and the width is 100 mm.

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

[0019] 1. The utility model, in an ideal state, after injection molding, makes the epoxy molding material sample have an "I"-shaped structure. When measuring, the depressions at both ends can be used as the measurement reference, that is, the caliper is clamped in the two depressions, the measurement position is fixed, the difference in personnel operation is reduced, and the measurement accuracy is improved. Even if the injection molding is not full, one end of the caliper can still be clamped in the depression, and the other end can be clamped in the other end corresponding to the horizontal direction, and accurate measurement can still be achieved.

[0020] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional image of the mold;

[0022] Figure 2 It is a top view of the mold;

[0023] Figure 3 is a schematic diagram of the sample;

[0024] Figure 4 is a schematic diagram of an unfilled sample.

[0025] Figure numerals: 1. mold body; 2. injection hole; 3. flow channel; 4. sample slot; 5. exhaust slot; 6. protrusion. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0027] like Figure 1-Figure 2As shown, in one embodiment, a mold for testing shrinkage performance of epoxy molding compound is used for molding epoxy molding compound samples, and the specific structure includes:

[0028] The mold body 1 is the main structure of the entire mold. In this embodiment, the mold body 1 is a rectangular parallelepiped with a size of 348*100*10 mm. The mold body 1 can be made of metal material, which is more durable, has higher strength, and improves service life;

[0029] An injection hole 2 is provided on the mold body 1, and the injection hole 2 serves as an inlet for the injection molding raw material. In this embodiment, the injection hole 2 is provided at the center of the mold body 1, and a plurality of sample slots 4 are symmetrically provided on both sides of the injection hole 2. In this embodiment, two sample slots 4 are provided on each side. The sample slots 4 are connected to the injection hole 2 through the flow channel 3. After the injection molding raw material is injected through the injection hole 2, it can flow evenly to the sample slots 4 on both sides through the flow channel 3.

[0030] Furthermore, the injection hole 2 is a rectangular structure, while in some other embodiments, the injection hole 2 may be a circular or elliptical structure.

[0031] For sample slot 4, refer to Figure 2 It can be seen that the sample slot 4 is rectangular in shape, and protrusions 6 are formed at both ends of the rectangle. In this embodiment, the protrusions 6 are arranged at the two short sides of the rectangle, and the two protrusions 6 are symmetrically arranged about the center line of the rectangle. In summary, after the sample slot 4 and the protrusions 6 are combined, the shape of the entire sample presents an "I" shape. Figure 3 As shown, under ideal conditions, after injection molding, the epoxy molding compound sample has an "I"-shaped structure. When measuring, the depressions at both ends can be used as the measurement reference, that is, the caliper is clamped in the two depressions to fix the measurement position, reduce the difference in human operation, and improve the accuracy of measurement.

[0032] The length of the sample slot 4 is 120 mm, the length and width of the protrusion 6 are both 5, the width of the injection hole 2 is 16 mm, and the length of the flow channel 3, that is, the straight path from the edge of the injection hole 2 to the sample slot 4, is 13 mm.

[0033] Even if the sample tank 4 is not fully injected, Figure 4 As shown, one end of the caliper can still be clamped in the depression and the other end can be clamped in the corresponding horizontal direction, and accurate measurement can still be achieved to solve the problem that the end of the sample with poor fluidity in the prior art may be not fully injected, affecting the success rate of sample preparation and test accuracy.

[0034] In some embodiments, Figure 2As shown, an exhaust groove 5 is opened at the bottom of the mold body 1, and there are four exhaust grooves 5 in total. Each exhaust groove 5 is connected to the bottom of the adjacent sample groove 4. The width of the exhaust groove 5 is 5 mm and the depth is 2 mm. After the injection molding raw material enters the sample groove 4 along the flow channel 3, the raw material squeezes the gas in the sample groove 4 out of the exhaust groove 5, which can effectively reduce the residual gas in the sample and effectively reduce the error when conducting the molding shrinkage test.

[0035] Furthermore, in the present application, the mold body 1, the injection hole 2, the sample slot 4, the flow channel 3 and the protrusion 6 are formed as an integrated structure, which makes the strength of the entire mold higher and can effectively improve the service life of the entire mold.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mold for testing the shrinkage performance of epoxy molding compound, characterized in that: include: Mold body; An injection hole is provided in the mold body; A plurality of sample grooves are provided in the mold body, and the sample grooves are connected to the injection holes through flow channels.

2. The mold for testing shrinkage performance of epoxy molding compound according to claim 1, characterized in that: Both ends of the sample groove are integrally formed with protrusions.

3. The mold for testing shrinkage performance of epoxy molding compound according to claim 2, characterized in that: The mold body, the injection hole, the sample slot, the flow channel and the protrusion are formed as an integrated structure.

4. The mold for testing shrinkage performance of epoxy molding compound according to claim 1, characterized in that: An exhaust groove is formed at the bottom of the mold body, and the exhaust groove is communicated with the bottom of the sample groove.

5. The mold for testing shrinkage performance of epoxy molding compound according to claim 2, characterized in that: The length of the sample groove is 120 mm, the length of the protrusion is 5 mm, the width of the injection hole is 16 mm, and the length of the flow channel is 13 mm.

6. The mold for testing shrinkage performance of epoxy molding compound according to claim 1, characterized in that: There are four sample slots, and every two sample slots are symmetrically arranged around the injection hole.

7. The mold for testing shrinkage performance of epoxy molding compound according to claim 2, characterized in that: The sample slot is a rectangular structure, and the protrusions are arranged on two short sides of the sample slot facing each other.

8. The mold for testing shrinkage performance of epoxy molding compound according to claim 7, characterized in that: The protrusions are symmetrically arranged at two ends of the sample slot.

9. The mold for testing shrinkage performance of epoxy molding compound according to claim 1, characterized in that: The length of the mold body is 348 mm and the width is 100 mm.

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