An evaluation piece and test mold for testing the molding properties of materials

Abstract

This utility model proposes an evaluation component and test mold for testing the molding performance of materials, comprising: a main flow channel; a flowability test area located at the upper part of the main flow channel; a surface texture test area with a circular projected outer periphery located in the middle of the main flow channel; an overmolding test area and a through-hole test area, both located within the main flow channel, respectively located at the lower right and lower left of the surface texture test area. This provides an evaluation component and test mold for testing the molding performance of materials, solving the problems that relying solely on experience when using new materials can easily lead to injection molding defects, and that existing tests lack integration and cannot provide comprehensive and effective guidance in the early stages of product design.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, specifically to an evaluation part and test mold for testing the molding performance of materials. Background Technology

[0002] In the field of injection molding, the continuous emergence of new materials has brought more possibilities for improving product performance, but it has also posed new challenges to the injection molding process. When using new materials, relying solely on past experience to formulate injection molding plans and design product structures can easily lead to various injection molding defects due to insufficient understanding of the molding performance of the new materials. For example, the flowability of new materials may differ significantly from that of traditional materials, and the runners and product wall thicknesses designed based on experience may result in incomplete filling or overfilling; if the ability to replicate surface textures is unclear, the surface quality of the molded product may not meet requirements; when it comes to overmolding structures, if the bonding performance of new materials with other materials such as metals is judged solely based on experience, weak bonding and easy detachment may occur; and for products with small through-holes, whether the new material can successfully mold the required fine structure may lead to defects such as through-hole blockage and incomplete molding if there is a lack of prior verification. These problems often only become apparent during the mass production stage, and modifying the product structure at this point not only consumes a lot of time and costs but also affects the product's time-to-market. Therefore, in the early stages of product design, it is necessary to conduct comprehensive testing and verification of the molding performance of new materials in order to optimize the product structure design based on the test results. However, current testing methods for material molding performance often lack an integrated testing product. Multiple different test samples are required to test the material's flowability, surface texture replication ability, overmolding performance, and fine structure molding ability, etc. This fragmented testing approach is inefficient and makes it difficult to comprehensively evaluate the overall performance of new materials in actual product molding, thus failing to provide comprehensive and effective guidance in the early stages of product design. Summary of the Invention

[0003] The problem this utility model aims to solve is to provide an evaluation component and test mold for testing the molding performance of materials, thereby addressing the issue that relying solely on experience when using new materials can easily lead to injection molding defects, and that existing tests lack integration and cannot provide comprehensive and effective guidance in the early stages of product design.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: an evaluation component for testing the molding performance of materials, comprising: a main flow channel; a flowability test area located at the upper part of the main flow channel; a surface texture test area with a circular outer projection, located in the middle of the main flow channel; a coating test area and a through-hole test area, both located inside the main flow channel, respectively located at the lower right and lower left of the surface texture test area.

[0005] By integrating the flowability testing area, surface texture testing area, overmolding testing area, and through-hole testing area into the main flow channel, this design achieves simultaneous testing of material flowability, surface texture replication ability, overmolding bonding performance, and fine structure molding capability during a single injection molding process. This solves the problems of injection molding defects easily caused by relying solely on experience when using new materials, and the lack of integration in existing tests, which fail to provide comprehensive and effective guidance in the early stages of product design. The combined design creates a relatively complex cavity structure to avoid the shortcomings of previous single-test methods that could not simulate complex environments.

[0006] Furthermore, the flowability testing area includes multiple parallel, spaced strip-shaped testing sections; the thickness of each strip-shaped testing section decreases in a stepped manner from one side to the other, with the thickest section being 0.5 mm. By setting multiple parallel, spaced strip-shaped testing sections with a stepped thickness (0.5 mm at the very end) in the flowability testing area, the flowability and filling capacity of the new material at different thicknesses can be accurately tested, solving the problem that relying solely on experience to judge the flowability of a new material can easily lead to filling defects.

[0007] Furthermore, the surface texture test area is composed of four spherical cap units divided at 90° angles, stitched together to form a complete arc surface; each spherical cap unit has a unique texture etched on its surface with a depth of 20–50 μm. By setting the surface texture test area to be a complete arc surface composed of four spherical cap units divided at 90° angles, and each spherical cap unit has a unique texture etched on its surface with a depth of 20–50 μm, a comprehensive testing effect is achieved on the ability of new materials to replicate different curvatures and texture depths, solving the problem that traditional tests cannot fully reflect the surface forming quality of new materials.

[0008] Furthermore, the overmolding test area includes a tubular overmolding section protruding upwards from the top of the main flow channel, with a metal ring coaxially embedded in the inner wall of the tubular overmolding section. By setting a tubular overmolding section protruding upwards from the top of the main flow channel in the overmolding test area, and having a metal ring coaxially embedded in the inner wall of the tubular overmolding section, the effect of simulating the actual overmolding scenario to test the bonding performance of the new material and the metal is generated, solving the problem of weak bonding that easily occurs when relying on experience to design overmolding structures.

[0009] Furthermore, the outer wall of the metal ring is provided with spaced microgrooves. By creating spaced microgrooves on the outer wall of the metal ring, the accuracy of the test on the bonding strength between the new material and the metal ring is enhanced, solving the problem of difficulty in accurately assessing the bonding strength of the adhesive.

[0010] Furthermore, the through-hole test area is provided with multiple test holes penetrating the main flow channel, and the multiple test holes are evenly distributed around the circumference of the surface texture test area; the diameter of adjacent test holes decreases in a gradient manner, with the minimum diameter being 0.8 mm. By setting multiple test holes penetrating the main flow channel in the through-hole test area, evenly distributed around the circumference of the surface texture test area, and with adjacent diameters decreasing in a gradient manner (minimum diameter 0.5 mm), the ability to form new materials at different dimensional microstructures can be evaluated, solving the problem of not being able to predict the forming defects of microstructures of new materials in advance.

[0011] A test mold includes an upper mold core and a lower mold core, which together form a test cavity for injection molding the aforementioned evaluation component used to test the molding performance of materials. By using the upper and lower mold cores of the test mold to form the test cavity for injection molding the evaluation component, the integrated test product can be accurately molded to facilitate the smooth conduct of various performance tests, thus solving the problem of lacking dedicated molds to support integrated testing. Attached Figure Description

[0012] Figure 1 This is a top view of the present invention; Figure 2 for Figure 1 Sectional view at AA; Figure 3 for Figure 1 Sectional view at BB; Figure 4 for Figure 1 Sectional view at CC; Figure 5 This is a perspective view of the mold of this utility model.

[0013] Illustration: 1. Main flow channel section; 2. Flowability test area; 2.1. Strip test section; 3. Surface texture test area; 3.1. Spherical crown unit; 4. Overmolding test area; 4.1. Overmolding section; 4.2. Metal ring; 4.2.1. Micro groove; 5. Through hole test area; 5.1. Test hole; 6. Upper mold core; 7. Lower mold core. Detailed Implementation

[0014] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0015] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0016] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

[0017] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0018] Please see Figures 1 to 5 An evaluation component for testing the molding performance of materials includes a main flow channel 1, a flowability test area 2, a surface texture test area 3, an overmolding test area 4, and a through-hole test area 5. The flowability test area 2 is located at the upper part of the main flow channel 1. The surface texture test area 3 has a circular outer periphery and is located in the middle of the main flow channel 1. The overmolding test area 4 and the through-hole test area 5 are both located inside the main flow channel 1, located at the lower right and lower left of the surface texture test area 3, respectively. The fluidity test area 2 includes seven parallel and spaced strip test sections 2.1. The thickness of each strip test section 2.1 decreases stepwise from one side to the other, with thicknesses of 2mm, 1.8mm, 1.5mm, 1.2mm, 1mm, 0.8mm, and 0.5mm respectively. The surface texture test area 3 is composed of four spherical cap units 3.1 divided at 90° to form a complete arc surface. Each spherical cap unit 3.1 has a different texture etched on its surface with a depth of 20–50 μm. The coating test area 4 includes a tubular coating part 4.1 that protrudes upward from the top of the main flow channel part 1. A metal ring 4.2 is coaxially embedded in the tubular inner wall of the coating part 4.1, and micro grooves 4.2.1 are spaced apart on the outer wall of the metal ring 4.2. The through-hole test area 5 is provided with nine test holes 5.1 that penetrate the main flow channel 1. These test holes 5.1 are evenly distributed around the surface texture test area 3. The diameters of adjacent test holes 5.1 decrease in a gradient, and the diameters are φ6, φ4, φ2.6, φ1.8, φ1.6, φ1.4, φ1.2, φ1, and φ0.8, respectively. A test mold includes an upper mold core 6 and a lower mold core 7, which together form a test cavity for injection molding the aforementioned evaluation piece used to test the molding performance of materials.

[0019] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. An evaluation piece for testing the forming properties of materials, characterized in that, Include: Main flow channel section (1); The fluidity testing area (2) is located above the main flow channel section (1); The surface texture test area (3) has a circular projection periphery and is located in the middle of the main flow channel (1); The overmolding test area (4) and the through hole test area (5) are both located inside the main flow channel (1), and are located to the lower right and lower left of the surface texture test area (3), respectively.

2. The evaluation piece for testing the forming properties of materials according to claim 1, characterized in that: The fluidity test area (2) includes multiple parallel and spaced strip test sections (2.1); the thickness of each strip test section (2.1) decreases stepwise from one side to the other side, and the thickness at the very end is 0.5 mm.

3. The evaluation piece for testing the forming properties of materials according to claim 1, characterized in that: The surface texture test area (3) is composed of four spherical cap units (3.1) divided at 90° to form a complete arc surface; each spherical cap unit (3.1) has a texture etched on its surface with a depth of 20–50 μm and each texture is different.

4. The evaluation member for testing material forming performance according to claim 1, characterized by: The coating test area (4) includes a tubular coating part (4.1) that protrudes upward from the top of the main flow channel part (1), and a metal ring (4.2) is coaxially embedded in the tubular inner wall of the coating part (4.1).

5. The evaluation member for testing material forming performance according to claim 4, characterized by: The outer wall of the metal ring (4.2) is provided with micro-grooves (4.2.1) spaced apart.

6. The evaluation member for testing material forming performance according to claim 1, characterized by: The through-hole test area (5) is provided with multiple test holes (5.1) that penetrate the main flow channel (1). The multiple test holes (5.1) are evenly distributed around the surface texture test area (3). The diameter of adjacent test holes (5.1) decreases in a gradient manner, with the minimum diameter being 0.8 mm.

7. A test mold characterized by: It includes an upper mold core (6) and a lower mold core (7), which together form a test cavity for injection molding the evaluation piece for testing the molding performance of materials as described in any one of claims 1-6.

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