Injection molding plate
By designing the injection molding plate with different thickness, and setting the gap between the shrinking hole and the inner corner of the circle in it, the problem of quality defects in the thick wall injection plastic parts is solved, and its impact on mechanical performance is studied.
Patent Information
- Application Number
- CN202420311158.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-20
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-02-20
AI Technical Summary
In injection molded products, thick-walled or solid super-thick injection molded parts are prone to mass defects such as shrinkage holes and welded wires, which affects mechanical properties.
Designed a type of injection molding board, including the inlet, pouring area, the first and second parts, the thickness of the second part is larger than the first part, and the internal contraction is set. Fall.
Through this design, the impact of shrinking holes, gaps and inverted inner angles on material mechanical properties can be studied, thereby improving the quality of injection molding products.
Smart Images
Figure CN222406902U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molding, in particular to an injection molding plate. Background Art
[0002] The contents of this section merely provide background information related to the present invention and may not constitute prior art.
[0003] In injection molded products, the wall thickness of injection molded parts is generally 2mm to 4mm, but there are also some products with thicker walls. Injection molded parts with a wall thickness greater than 6mm are usually called thick-walled parts. Due to various factors such as customer demand, product shape, and product performance, some thick-walled or even solid ultra-thick injection molded parts are required. Such structural design is prone to quality defects such as shrinkage holes and weld lines, which have an adverse effect on the mechanical properties of injection molded products. Utility Model Content
[0004] One purpose of the utility model is to provide an injection molded plate, so that the influence of shrinkage cavities on the mechanical properties of materials can be studied.
[0005] Another object of the utility model is to provide an injection molded plate, so that the influence of the notch on the mechanical properties of the material can be studied.
[0006] Another object of the utility model is to provide an injection molded plate, so that the influence of the rounded inner angle on the mechanical properties of the material can be studied.
[0007] The utility model provides an injection molding plate. The injection molding plate comprises: a glue feeding part, a gate area, a first part and a second part; wherein the first part is closer to the gate area than the second part, and the thickness of the second part is greater than the thickness of the first part; and wherein the second part has a shrinkage cavity inside.
[0008] In some embodiments, the second portion has a notch penetrating the second portion along a thickness direction of the second portion.
[0009] In some embodiments, the notch has a diamond shape.
[0010] In some embodiments, one or more of the inner corners of the rhombus-shaped notches are rounded.
[0011] In some embodiments, the rounding radius of the rounded inner corner is in the range of 0.2 mm to 12 mm.
[0012] In some embodiments, the thickness of the first portion is in the range of 1 mm to 3 mm, and the thickness of the second portion is 2 mm-3 mm greater than the thickness of the first portion.
[0013] In some embodiments, the shape of the gate area is designed to make the flow length of the plastic melt from the glue inlet to the starting end of the first part through the surface of the gate area equal.
[0014] In some embodiments, the first surface of the gate region has an outwardly protruding curved surface shape, and the second surface of the gate region has an inwardly recessed curved surface shape.
[0015] In some embodiments, the injection molded plate further includes a transition portion between the gate region and the first portion, and a thickness of the transition portion gradually decreases in a direction from the gate region to the first portion.
[0016] In some embodiments, a columnar protrusion protruding outward in a thickness direction of the injection molding plate is provided on the second surface of the gate region at a position adjacent to the transition portion.
[0017] In the injection-molded plate according to the present disclosure, the first part of the injection-molded plate is closer to the gate area than the second part, and the thickness of the second part is greater than that of the first part, so that the shrinkage of the second part is greater, thereby generating shrinkage holes inside the second part, thereby studying the influence of the shrinkage holes on the mechanical properties of the material; the second part of the injection-molded plate is provided with a notch running through the second part, thereby studying the influence of the notch on the mechanical properties of the material; by rounding one or more of the inner angles of the rhombus-shaped notch, the influence of the rounded inner angles on the mechanical properties of the material can be studied. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The following will describe the embodiments of the present invention by way of example only with reference to the accompanying drawings. In the accompanying drawings, the same features or components are represented by the same reference numerals, and the drawings are not necessarily drawn to scale. In the accompanying drawings:
[0019] Figure 1 shows a perspective schematic diagram of an injection molded plate according to an embodiment of the present disclosure;
[0020] Figure 2 A perspective schematic diagram showing an injection-molded plate according to an embodiment of the present disclosure viewed from another angle;
[0021] Figure 3 shows a side view of an injection molded plate according to an embodiment of the present disclosure;
[0022] Figure 4shows a schematic plan view of an injection molded plate according to an embodiment of the present disclosure;
[0023] Figure 5 A schematic plan view of an injection-molded plate according to an embodiment of the present disclosure viewed from another side is shown;
[0024] Figure 6 A cross-sectional view showing an injection molded plate along its length according to an embodiment of the present disclosure; and
[0025] Figure 7 A cross-sectional view along the length of a second portion of an injection molded plate according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION
[0026] The following description is merely exemplary in nature and is not intended to limit the present invention, its application and use. It should be understood that in all of the accompanying drawings, similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present invention, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present invention. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present invention.
[0027] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in this article. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.
[0028] The following will be combined Figures 1 to 7 The injection molded plate 1 according to the embodiment of the present disclosure will be described in detail. Figure 1 A schematic perspective view of an injection molded plate 1 according to an embodiment of the present disclosure is shown. Figure 2 A perspective schematic diagram of the injection-molded plate 1 according to an embodiment of the present disclosure viewed from another angle is shown. Figure 3 A side view of an injection molded plate 1 according to an embodiment of the present disclosure is shown. Figure 4 A schematic plan view of an injection-molded plate 1 according to an embodiment of the present disclosure is shown. Figure 5 A schematic plan view of the injection-molded plate 1 according to an embodiment of the present disclosure as viewed from another side is shown. Figure 6A cross-sectional view of an injection-molded plate 1 according to an embodiment of the present disclosure along its length direction is shown. Figure 7 A cross-sectional view along the length direction of the second portion 40 of the injection molded plate 1 according to an embodiment of the present disclosure is shown.
[0029] like Figures 1 to 5 As shown, the injection molding plate 1 of the present invention includes a glue feeding portion 10, a gate area 20, a first portion 30 and a second portion 40. Figures 1 to 5 As shown, the first portion 30 is closer to the gate region 20 than the second portion 40, and the thickness of the second portion 40 is greater than the thickness of the first portion 30. The injection portion 10 refers to the section formed by the plastic melt at the mold entrance during the injection molding process. The gate region 20 refers to the section formed by the plastic melt during the injection molding process when it flows from the mold entrance to the mold cavity (where the first portion 30 and the second portion 40 of the injection molded plate 1 are formed).
[0030] In this embodiment, if Figure 6 and Figure 7 As shown, the second part 40 has a shrinkage cavity 43 inside. In the injection molded plate 1 according to the utility model, since the first part 30 is closer to the gate area 20 than the second part 40, and the thickness of the second part 40 is greater than the thickness of the first part 30, the first part 30 closer to the gate area 20 can solidify earlier, resulting in a poor pressure holding effect of the second part 40 farther away from the gate area 20, causing the second part 40 to shrink more, thereby generating a shrinkage cavity 43 inside the second part 40. Therefore, by cutting the second part 40 of the injection molded plate 1 to obtain a test specimen of a suitable size, the influence of shrinkage cavities on the mechanical properties of the material can be studied.
[0031] Preferably, if Figures 1 to 5 As shown, the injection molded plate 1 further includes a transition portion 50 between the gate region 20 and the first portion 30, and the thickness of the transition portion 50 gradually decreases in the direction from the gate region 20 to the first portion 30. By providing the transition portion 50, the thickness of the gate region 20 can gradually transition to the thickness of the first portion 30, so that the structures of the first portion 30 and the second portion 40 of the injection molded plate 1 can be more uniform.
[0032] In this embodiment, if Figures 1 to 3 and Figure 6 As shown, the glue feed portion 10 is cylindrical. However, it is contemplated that in embodiments not shown in the present disclosure, the glue feed portion may have any suitable shape.
[0033] In this embodiment, the shape of the gate area 20 is designed so that the plastic melt flows from the injection portion 10 to the starting end of the first portion 30 (in this embodiment, at the interface between the transition portion 50 and the first portion 30, or at the interface between the gate area 20 and the first portion 30 if there is no transition portion 50) over the surface of the gate area 20. The plastic melt can reach the starting end of the first portion 30 at the same time from the injection portion 10, so that the first portion 30 and the second portion 40 of the injection molded plate 1 can obtain consistent fiber orientation. In this embodiment, as Figure 1 , Figure 2 and Figure 6 As shown, the first surface 22 of the gate region 20 is in the shape of a curved surface protruding outward, and the second surface 23 of the gate region 20 is in the shape of a curved surface recessed inward.
[0034] Preferably, the thickness of the first part 30 and the thickness of the second part 40 are both variable, so that the size of the shrinkage cavity generated inside the second part 40 is different. Preferably, the thickness of the first part 30 is in the range of 1 mm to 3 mm, and the thickness of the second part is 2 mm-3 mm greater than the thickness of the first part. Therefore, by cutting the second part 40 of the injection molded plate 1 to obtain a test specimen of a suitable size, the influence of shrinkage cavities of different sizes on the mechanical properties of the material can be studied.
[0035] Preferably, if Figure 1 , Figure 2 and Figures 4 to 7 As shown, the second part 40 has a notch 41 that penetrates the second part 40 along the thickness direction of the second part 40. Thus, by cutting off the section of the second part 40 of the injection molded plate 1 including the notch 41 to obtain a test specimen of appropriate size, the influence of the notch on the mechanical properties of the material can be studied.
[0036] In this embodiment, if Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the notch 41 has a rhombus shape. Preferably, the inner angle of the rhombus-shaped notch 41 is variable, thereby resulting in a weld line 46 ( Figure 4 The orientation of the notch 41 (schematically shown in FIG. 1 ) can be changed. Thus, by cutting off a section of the second portion 40 of the injection molded plate 1 including the diamond-shaped notch 41 to obtain a test specimen of suitable size, the influence of weld lines of different orientations on the mechanical properties of the material can be studied. In an embodiment of the present invention not shown, it is conceivable that the notch can have a circular shape, an elliptical shape, a rectangular shape, a parallelogram shape or any other suitable shape.
[0037] Preferably, the size (e.g., side length, radius, area, etc.) of the notch 41 is variable. Thus, by cutting off the section of the second portion 40 of the injection molded plate 1 including the notch 41 to obtain a test specimen of appropriate size, the effect of notches of different sizes on the mechanical properties of the material can be studied.
[0038] Preferably, if Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, one or more of the inner angles of the rhombus-shaped notch 41 are rounded. Figure 4 and Figure 5 As clearly shown, three inner corners of the rhombus-shaped notch 41 are rounded. However, it is also conceivable that only one inner corner, two inner corners, or four inner corners of the rhombus-shaped notch 41 are rounded. Thus, by cutting off the section of the second part 40 of the injection-molded plate 1 including the rhombus-shaped notch 41 to obtain a test specimen of suitable size, the influence of the rounded inner corners on the mechanical properties of the material can be studied.
[0039] Preferably, the fillet radius of the filleted inner corner is variable. Thus, by cutting off the section of the second portion 40 of the injection molded plate 1 including the rhombus-shaped notch 41 to obtain a test specimen of suitable size, the influence of filleted inner corners with different fillet radii on the mechanical properties of the material can be studied. In addition, for anisotropic materials, such as carbon fiber composite materials, glass fiber composite materials, etc., the influence of filleted inner corners with different fillet radii in the 0° and 90° fiber orientation directions on the mechanical properties of the anisotropic material can be studied.
[0040] Preferably, the rounding radius of the rounded inner corner is in the range of 0.2 mm to 12 mm. Thus, the influence of the rounded inner corner with the rounding radius in the above range on the mechanical properties of the material can be studied.
[0041] Preferably, if Figure 2 and Figure 5 As shown, the second surface 23 of the gate region 20 is provided with a cylindrical protrusion 21 protruding outward in the thickness direction of the injection molding plate 1 at a position adjacent to the transition portion 50, and the cylindrical protrusion 21 matches the shape of the corresponding part of the injection molding mold. Figure 2 and Figure 5 As shown, the second surface 23 of the gate region 20 is provided with two cylindrical protrusions 21 at both ends of the position adjacent to the transition portion 50. However, it is contemplated that in embodiments not shown in the present disclosure, any number of cylindrical protrusions may be provided.
[0042] Preferably, if Figures 1 to 3 and Figure 6 to Figure 7As shown, the second portion 40 of the injection molded plate 1 has a third surface 44 (see Figure 7 ) and a fourth surface 45 opposite to the third surface 44 (see Figure 7 ), the second part 40 is provided with a protrusion 42 protruding outward from the third surface 44 and the fourth surface 45 of the second part 40 in the thickness direction of the injection molding plate 1 at the end away from the first part 30, and the two protrusions 42 match the shapes of the corresponding parts of the injection molding mold.
[0043] In addition, a test specimen of a suitable size may be cut from the first portion 30 of the injection molded plate 1 to perform a mechanical property test, thereby comparing the test data of the test specimen cut from the second portion 40 .
[0044] It should be noted that the "mechanical properties" described in this article include tensile strength, bending strength, fatigue strength, etc., that is, the various mechanical properties of the material can be tested to obtain the influence of relevant parameters (shrinkage holes, notches, weld line orientations and fillet radius, etc.) on the various mechanical properties of the material.
[0045] In addition, the injection molded plate 1 according to the utility model can obtain material strength data of weld lines with different orientations and the influence of rounded inner angles with different rounding radii on material strength, so that simulation and product design can be performed more accurately. In addition, the manufacturer's own R&D capabilities can be improved, and more comprehensive material data can be provided to customers.
[0046] Here, an exemplary embodiment of the injection molded plate according to the utility model has been described in detail, but it should be understood that the utility model is not limited to the specific embodiments described and shown in detail above. Without departing from the main purpose and scope of the utility model, those skilled in the art can make various modifications and variations to the utility model. All these modifications and variations fall within the scope of the utility model. Moreover, all the components described herein can be replaced by other technically equivalent components.
Claims
1. An injection molded plate, characterized in that: The injection molding plate comprises: a glue feeding portion, a gate area, a first portion and a second portion; wherein the first portion is closer to the gate region than the second portion, and the thickness of the second portion is greater than the thickness of the first portion; and The second part has a shrinkage hole inside.
2. The injection molded plate according to claim 1, characterized in that The second portion has a notch penetrating the second portion along a thickness direction of the second portion.
3. The injection molded plate according to claim 2, characterized in that: The notch has a rhombus shape.
4. The injection molded plate according to claim 3, characterized in that One or more of the inner corners of the rhombus-shaped notch are rounded.
5. The injection molded plate according to claim 4, characterized in that The rounding radius of the rounded inner corner is in the range of 0.2 mm to 12 mm.
6. The injection molded plate according to any one of claims 1 to 5, characterized in that The thickness of the first portion is in the range of 1 mm to 3 mm, and the thickness of the second portion is 2 mm-3 mm greater than the thickness of the first portion.
7. The injection molded plate according to any one of claims 1 to 5, characterized in that The shape of the gate area is designed so that the flow length of the plastic melt from the glue inlet to the starting end of the first part through the surface of the gate area is equal.
8. The injection molded plate according to claim 7, characterized in that The first surface of the gate region has an outwardly protruding curved surface shape, and the second surface of the gate region has an inwardly recessed curved surface shape.
9. The injection molded plate according to any one of claims 1 to 5, characterized in that The injection molded plate further includes a transition portion between the gate region and the first portion, and a thickness of the transition portion gradually decreases in a direction from the gate region to the first portion.
10. The injection molded plate according to claim 9, characterized in that The second surface of the gate region is provided with a columnar protrusion protruding outward in a thickness direction of the injection molded plate at a position adjacent to the transition portion.