Injection molding part

Abstract

The utility model relates to the technical field of injection molding, in particular to an injection molding part. The injection molding part comprises a first injection molding structure and a second injection molding structure; the first injection molding structure is formed by injection molding before the second injection molding structure; the first injection molding structure is provided with a first contact surface, the second injection molding structure is provided with a second contact surface, and the first contact surface is in contact with the second contact surface in the injection molding process; an avoiding structure is arranged on the edge of the contact part of the first contact surface and the second contact surface, and the avoiding structure can hide flashes and burrs. And the flash is hidden through avoiding design, so that the appearance attractiveness of the product is improved, the subsequent finishing procedure is reduced, the production efficiency is improved, the production cost is reduced, and the overall quality of the product is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding technical field especially relates to a injection molding part. BACKGROUND

[0002] Injection molding technology includes various molding methods, among which two-color injection molding is a commonly used injection molding technology. Two-color injection molding technology combines two different colors or materials (such as soft plastic and hard plastic) in a specific order in the injection molding machine through multiple injection molding, thereby combining the two materials organically to form a complete product. This method not only improves the functionality and aesthetics of the plastic part, but also enhances the durability and practicality of the product. However, in two-color injection molding, after the first injection is completed, the mold may not be tightly combined with the structure after the first injection during the subsequent injection molding process. When the mold locking force of the mold or machine is not sufficient to resist the tension of the molten plastic under high pressure during the subsequent injection molding process, the molten plastic may cause the plastic to overflow from the mold parting surface, forming a flash or burr between the first injection structure and the subsequent injection structure. This flash phenomenon not only affects the appearance of the product, but also may pose a potential risk to the functionality and safety of the product.

[0003] In related art, mechanical removal methods are usually used to remove the flash, such as using tools such as cutters and grinders for physical cutting. However, this method not only adds an additional processing step to the product, increasing production costs, but also may have assembly gaps during assembly, affecting the appearance quality of the product. SUMMARY

[0004] To solve the above technical problems, the present application provides an injection molding part, comprising: a first injection molding structure and a second injection molding structure;

[0005] The first injection molding structure is formed by injection molding before the second injection molding structure;

[0006] The first injection molding structure has a first contact surface, and the second injection molding structure has a second contact surface, the first contact surface and the second contact surface forming contact during injection molding;

[0007] An avoidance structure is provided on the edge of the contact part of the first contact surface and the second contact surface.

[0008] In some optional embodiments, the profile of the cross section of the avoidance structure is one of stepped and arc-shaped.

[0009] In some optional embodiments, at least one protrusion is provided on the first contact surface, and at least one groove is provided on the second contact surface;

[0010] The protrusion and the groove are in close contact; or,

[0011] The first contact surface is provided with at least one groove, and the second contact surface is provided with at least one protrusion;

[0012] The groove and the protrusion are in close contact.

[0013] In some optional embodiments, the at least one protrusion is arranged in a first corrugated structure according to a preset interval, and the at least one groove is arranged in a second corrugated structure according to the preset interval;

[0014] The first corrugated structure and the second corrugated structure are matched and in close contact.

[0015] In some optional embodiments, the first injection molding structure is provided with a preset number of first reinforcing ribs;

[0016] The second injection molding structure has a supporting surface, and the first reinforcing ribs abut against the supporting surface.

[0017] In some optional embodiments, the second injection molding structure is provided with a preset number of second reinforcing ribs;

[0018] The preset number of second reinforcing ribs are arranged on the supporting surface.

[0019] In some optional embodiments, the thickness of the first reinforcing rib is 1mm to 5mm;

[0020] In some optional embodiments, the thickness of the second reinforcing rib is 1mm to 5mm.

[0021] In some optional embodiments, the melting point of the material of the first injection molding structure is different from the melting point of the material of the second injection molding structure.

[0022] In some optional embodiments, the melting point of the material of the first injection molding structure is greater than or equal to the material of the second injection molding structure.

[0023] In some optional embodiments, the material of the first injection molding structure is acrylonitrile-butadiene-styrene plastic.

[0024] In some optional embodiments, the material of the second injection molding structure is acrylonitrile-butadiene-styrene plastic.

[0025] The technical scheme provided by the embodiments of the present application has the following technical effects:

[0026] The injection-molded part described in this application embodiment includes a first injection molding structure and a second injection molding structure. The first injection molding structure is formed before the second injection molding structure. The first injection molding structure has a first contact surface, and the second injection molding structure has a second contact surface. The first contact surface and the second contact surface form contact during the injection molding process. An avoidance structure is provided on the edge of the contact area between the first contact surface and the second contact surface. The avoidance structure can hide flash and burrs. Hiding flash through the avoidance design not only improves the appearance of the product but also reduces subsequent finishing processes, improves production efficiency, reduces production costs, and ensures the overall quality of the product. Attached Figure Description

[0027] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an injection molded part provided in an embodiment of this application;

[0029] Figure 2 This is a partial cross-section of an injection molded part provided in an embodiment of this application. Figure 1 ;

[0030] Figure 3 This is a partial cross-section of an injection molded part provided in an embodiment of this application. Figure 2 ;

[0031] Figure 4 This is a partially enlarged view of an injection molded part provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the internal structure of an injection molded part provided in an embodiment of this application;

[0033] Figure 6 This is a perspective view of the internal structure of an injection molded part provided in an embodiment of this application.

[0034] The following is supplementary explanation of the attached figures:

[0035] 10-First injection molding structure; 11-Groove; 12-First reinforcing rib; 20-Second injection molding structure; 21-Protrusion; 22-Second reinforcing rib; 23-Supporting surface; 30-Avoidance structure. Detailed Implementation

[0036] With reference to the drawings and embodiments disclosed herein, it should be understood that the drawings and detailed description are illustrative only and are not intended to limit the application as constructed and intended to be protected. The embodiments disclosed herein are intended to cover all adaptations and modifications of the various embodiments of the application described herein and equivalents thereof. In addition, it is intended that each of the embodiments described herein can be implemented in hardware, software or both hardware and software. The embodiments disclosed herein are intended to cover all adaptations and modifications of the various embodiments of the application described herein and equivalents thereof. In addition, it is intended that each of the embodiments described herein can be implemented in hardware, software or both hardware and software.

[0037] It should be noted that the terms "one embodiment" or "an embodiment" as used in the specification and claims of this application are to be interpreted to mean that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one implementation of the application. The appearance of the phrases "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment. It should be understood that the terms "upper" and "lower" are used in the description and in the claims to indicate relative positions for the purpose of illustration and description only and are not intended to limit the position of the device or element to a particular position or orientation. The terms "first" and "second" are used to describe various elements and are not intended to indicate relative importance or a required sequence of elements. Thus, features limited by "first" and "second" can include one or more such features. The terms "first" and "second" are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged as appropriate to allow the embodiments of the application described herein to be implemented in an order other than that illustrated or described herein. In addition, in the description of the embodiments, "a plurality of" means two or more, unless otherwise specified. Furthermore, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system or product that includes a list of steps or units is not necessarily limited to those steps or units that are clearly listed, but can include other steps or units that are not clearly listed or inherent to such process, method, product or apparatus.

[0038] For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present application and are not intended to limit the embodiments of the present application.

[0039] In order to solve the problem of burr and flash affecting the quality of injection molded products in the multiple injection molding process, the embodiment of the application provides an injection molded part, which comprises a first injection molded structure and a second injection molded structure, and the first injection molded structure is formed by injection molding before the second injection molded structure. The first injection molded structure has a first contact surface, the second injection molded structure has a second contact surface, the first contact surface and the second contact surface form contact in the injection molding process, and the edge of the contact part of the first contact surface and the second contact surface is provided with a avoiding structure, which can hide the flash and burr. The flash is hidden by avoiding design, so that the flash and burr do not need to be removed mechanically, not only improving the appearance of the product, but also reducing the subsequent finishing process, improving the production efficiency, reducing the production cost, and ensuring the overall quality of the product.

[0040] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of an injection molded part provided by the embodiment of the application. As Figure 1 shown, the injection molded part comprises a first injection molded structure 10 and a second injection molded structure 20.

[0041] In the embodiment of the application, the first injection molded structure 10 and the second injection molded structure 20 are obtained by twice injection molding, and the first injection molded structure 10 is obtained by injection molding before the second injection molded structure 20. The second injection molded structure 20 is obtained by twice injection molding based on the first injection molded structure 10. Multiple injection molding uses a staged injection molding process, which not only optimizes the production process and improves the efficiency, but also increases the durability and practicality of the product. The prior injection molding of the first injection molded structure 10 not only establishes the basic framework of the injection molded part, but also provides accurate positioning and support for the subsequent second injection molded structure 20, ensuring the close cooperation and overall stability between the two structures. According to actual needs, a third injection molded structure, a fourth injection molded structure, etc. can also be obtained by multiple injection molding technology, further enhancing the overall performance and structural strength of the product.

[0042] The first injection molded structure 10 has a first contact surface, and the second injection molded structure 20 has a second contact surface. The first contact surface refers to the surface in contact with the second injection molded structure, and similarly, the second contact surface refers to the surface in contact with the first injection molded structure. The first contact surface is in a bare state after the first injection molded structure 10 is formed, and in the forming process of the second injection molded structure 20, the melt of the material of the second injection molded structure 20 flows along the first contact surface under the guidance of the mold to form the second injection molded structure 20, and the surface formed along the first contact surface in the second injection molded structure 20 is the second contact surface. That is, the first contact surface and the second contact surface form contact in the injection molding process, realizing the close cooperation and functional integration of the first injection molded structure 10 and the second injection molded structure 20, and further optimizing the appearance quality and assembly precision of the product.

[0043] In the embodiments of the present application, the surface of the first injection molding structure 10 can have certain lines. The lines can be straight lines, cross lines, wavy lines, dotted lines, etc. These lines can increase the appearance, feel, anti-skid performance or specific functions of the product. Since the surface of the first injection molding structure 10 is provided with lines, when the second injection molding structure 20 is injection molded, the first injection molding structure 10 will not be tightly combined with the mold, so that during the injection molding of the second injection molding structure 20, the melt of the material of the second injection molding structure 20 will overflow from the gap between the first injection molding structure 10 and the mold under the action of the injection molding pressure, thereby forming a flash.

[0044] In order to avoid the flash damaging the appearance of the product on the surface of the injection molded part, the edge of the contact part between the first contact surface and the second contact surface is specially provided with a avoiding structure 30. Figure 2 is a partial cross section of a injection molded part provided by the embodiments of the present application Figure 1 As shown in Figure 2 , the avoiding structure 30 can guide the flow of the material of the second injection molding structure 20 during the injection molding of the second structure, thereby guiding the excess melt of the material of the second structure generated during the injection molding to the inside of the avoiding structure 30, not only improving the appearance quality of the product, but also reducing the post-processing process required for removing the flash burr, saving time and processing cost.

[0045] Specifically, the cross-sectional profile shape of the avoiding structure 30 is stepped or arc-shaped. Alternatively, the stepped shape can be a one-step or a multi-step. Alternatively, the arc shape can be a circular arc, or a non-circular arc such as an elliptical arc, a parabolic arc, a free curve arc, etc., or a plurality of arc lines with different radii connected. During the injection molding process, when the material of the second injection molding structure 20 is injected, the overflowed melt will be guided into the avoiding structure 30, so that the flash or burr is not visible outside the product, realizing the hiding of the flash / burr. In some embodiments, the cross-sectional profile shape of the avoiding structure 30 can also be other shapes as long as the flash and burr can be hidden, which will not be illustrated here.

[0046] In the embodiments of the present application, Figure 3 is a partial cross section of a structure of an injection molded part provided by the embodiments of the present application Figure 2 As shown in Figure 3 , at least one protrusion 21 is arranged on the first contact surface, and the protrusion is used to increase the contact area of the first contact surface and the second contact surface, so that the stress distribution between the first contact surface and the second contact surface is more uniform, and the connection is more firm. Figure 4 is a detailed view of a partial structure of an injection molded part provided by the embodiments of the present application, as Figure 4As shown, at least one groove 11 is arranged on the second contact surface, and the number of the protrusions 21 is equal to that of the grooves 11. The protrusions 21 are embedded in the corresponding grooves 11 to form a fitting. In actual application, the protrusions 21 are formed in the grooves 11 in the process of injection molding, and the protrusions 21 and the grooves 11 form a close contact after cooling and solidification. Not only the physical firm connection is ensured, but also the overall stability and structural strength of the injection molded part are improved. In addition, when subjected to external forces such as pulling or twisting, the fitting structure can provide additional resistance to prevent accidental separation or damage of the injection molded part.

[0047] In some optional embodiments, the positions of the grooves 11 and the protrusions 21 can be replaced with each other, that is, at least one groove 11 is arranged on the first contact surface, and at least one protrusion 21 is arranged on the second contact surface; the grooves 11 and the protrusions 21 are fitted with each other to form a close contact.

[0048] In the embodiments of the present application, the at least one protrusion 21 can be arranged according to a preset interval to form a first corrugated structure, and similarly, the at least one groove 11 can also be arranged according to a preset interval to form a second corrugated structure. The corrugated structures on the first contact surface and the second contact surface are designed to be complementary, that is, the peaks on the first contact surface correspond to the valleys on the second contact surface, or the valleys on the first contact surface correspond to the peaks on the second contact surface. When the two injection molded structures are aligned and a certain pressure is applied, the peaks on the first contact surface are embedded in the valleys on the second contact surface to achieve a close physical contact. Optionally, the preset intervals can be equal or unequal. That is, the intervals between the protrusions / recesses in the first corrugated structure and the second corrugated structure can be uniform or non-uniform, which can be selected according to actual conditions.

[0049] In the embodiments of the present application, Figure 5 is a schematic diagram of an internal structure of an injection molded part provided by the embodiments of the present application. As shown in the figure, Figure 5 a preset number of first reinforcing ribs 12 are arranged on the first injection molded structure 10. Figure 6 is a perspective view of an internal structure of an injection molded part provided by the embodiments of the present application. As shown in the figure, Figure 6 the second injection molded structure 20 has a support surface 23, and the first reinforcing ribs 12 abut against the support surface 23 to form a firm connection point, effectively dispersing and bearing external applied forces. Similarly, a preset number of second reinforcing ribs 22 can also be arranged on the second injection molded structure 20. The preset number of second reinforcing ribs 22 are arranged on the support surface 23, thereby improving the structural strength of the second injection molded structure 20.

[0050] In the embodiments of the present application, the number of the first reinforcing ribs 12 can be the same as or different from the number of the second reinforcing ribs 22. Optionally, the number of the first reinforcing ribs 12 is the same as the number of the second reinforcing ribs 22, and the first reinforcing ribs 12 and the second reinforcing ribs 22 are connected one by one in structure to form a comprehensive reinforcing system. This design not only significantly improves the overall rigidity of the injection molded part, but also further enhances the stability and reliability of the structure through the mutual complementation of the second reinforcing ribs 22 and the first reinforcing ribs 12. During the injection molding process of the second injection molded structure, the second injection molded structure material is heated to a flowable state and injected into the mold. At this time, the first reinforcing ribs 12 and the second reinforcing ribs 22 can be preliminarily aligned in the heated state due to the mold design and the flowability of the material. As the plastic material cools and solidifies, the first reinforcing ribs 12 and the second reinforcing ribs 22 gradually shrink during the cooling process and finally achieve close abutment. This abutment after cooling ensures the firm connection between the reinforcing ribs, and because the contact points of the reinforcing ribs naturally and closely combine during the cooling process, the overall stability and durability of the injection molded part are improved.

[0051] In some embodiments, the second reinforcing ribs 22 can be arranged obliquely corresponding to the first reinforcing ribs 12, and the first reinforcing ribs 12 abut the side of the second reinforcing ribs 22. This oblique arrangement not only increases the visual aesthetics of the product, but also improves the reliability of the connection in structure. During the injection molding process, this oblique reinforcing rib design makes it easier for the plastic material to achieve alignment and close contact during the flow and cooling process, thereby forming a more firm and stable connection in the final product.

[0052] It should be noted that too many reinforcing ribs can significantly improve the rigidity and strength of the part, but at the same time, it can also lead to an increase in manufacturing cost and part weight, a more complex manufacturing process, and an increase in cost. On the other hand, too few reinforcing ribs can reduce cost and weight, simplify the manufacturing process, but may sacrifice the overall rigidity of the part, resulting in a decrease in the overall strength of the product. Therefore, when designing, the number of reinforcing ribs needs to be designed according to the specific situation of the part to achieve the optimal structure. This corresponding design ensures that the connection between the reinforcing ribs can evenly distribute the stress throughout the injection molded part, thereby improving the rigidity and resistance to deformation of the product.

[0053] The injection molded part is manufactured by an injection mold, and the injection mold includes two parts, a front mold core and a back mold core, which jointly determine the shape and internal structure of the injection molded part. The first reinforcing rib 12 is arranged inside the first injection molded structure 10, which can promote the uniform distribution of the material of the first injection molded structure 10 and the material of the second injection molded structure 20, increase the rigidity of the mold to reduce deformation, thereby ensuring the consistency of the back mold core of the first injection molding and the back mold core of the second injection molding. When the first reinforcing rib and the second reinforcing rib are connected, the shapes of the two back mold cores may not be consistent, increasing the injection molding cost. Therefore, in an exemplary embodiment of the present application, the first reinforcing rib and the second reinforcing rib are not connected. In the process of multiple injection molding, if the reinforcing ribs are directly connected, the flow and filling of the material may be affected, resulting in defects in the injection molded part. By avoiding the direct connection of the reinforcing ribs, the flow and filling of the material can be better controlled, and the quality and consistency of the injection molded part can be improved.

[0054] In an embodiment of the present application, the thickness of the first reinforcing rib 12 can be 1mm to 5mm, such as 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5.0mm, etc. The thickness of the second reinforcing rib 22 is 1mm to 5mm. Such as 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5.0mm, etc. The thickness of the first reinforcing rib and the second reinforcing rib can be selected as needed.

[0055] When multiple injection molding is performed, the first injection molded structure 10 is first formed and solidified to obtain the first reinforcing rib 12, which provides internal rigidity and support for the injection molded part. Then, after the first injection molded structure 10 is completely solidified, the second injection molded structure 20 is injection molded. The second injection molded structure 20 uniformly distributes the material on the first injection molded structure 10, avoiding the surface shrinkage problem caused by the excessive thickness of the first reinforcing rib 12, ensuring the smoothness and uniformity of the product appearance surface when the second injection molded structure 20 is formed, realizing the strict control of the product appearance quality while maintaining the structural strength, and ensuring the functionality and aesthetics of the injection molded part.

[0056] In an embodiment of the present application, the material of the first injection molded structure 10 and the material of the second injection molded structure 20 can be the same or different.

[0057] As an optional implementation, the material of the first injection molding structure 10 is different from the material of the second injection molding structure 20. The melting point of the material of the first injection molding structure 10 is greater than or equal to the melting point of the material of the second injection molding structure 20. Because when the material of the second injection molding structure 20 is injected, the material of the first injection molding structure 10 is prevented from re-melting or deforming due to heat because of the higher melting point, thereby ensuring the close combination between the materials of the first injection molding structure 10 and the second injection molding structure 20. In addition, the higher melting point also means that the material of the first injection molding structure 10 remains in shape in the mold for a longer time, which helps to realize more complex designs and details and improve the diversity of injection molding product.

[0058] Optionally, the material of the first injection molding structure 10 can be acrylonitrile-butadiene-styrene plastic (ABS), polycarbonate (PE), polypropylene (PP), thermoplastic elastomer (TPE), polyamide (PA), etc. The material of the second injection molding structure 20 can be acrylonitrile-butadiene-styrene plastic (ABS), polycarbonate (PE), polypropylene (PP), thermoplastic elastomer (TPE), polyamide (PA), etc. These materials can be selected according to the functional requirements and aesthetics of the product to realize the combination of hardness and softness, the collocation of different colors, or the fusion of other characteristics.

[0059] In summary, the technical scheme of the utility model has the following beneficial effects:

[0060] The injection molding part provided by the embodiment of the application comprises a first injection molding structure and a second injection molding structure. The first injection molding structure is formed by injection molding before the second injection molding structure. The first injection molding structure has a first contact surface, and the second injection molding structure has a second contact surface. The first contact surface and the second contact surface are in contact during the injection molding process. An avoiding structure is arranged on the edge of the contact part of the first contact surface and the second contact surface. The avoiding structure can hide the flash and burrs. The avoiding design hides the flash, improves the appearance of the product, reduces the subsequent finishing process, improves the production efficiency, reduces material waste and production cost, and ensures the overall quality of the product. In addition, a reinforcing rib is arranged on the first injection molding structure to enhance the structural strength of the injection molding part and prevent the appearance of the injection molding part from shrinking, thereby ensuring the surface quality of the product. Furthermore, a protruding structure is arranged between the first injection molding structure and the second injection molding structure to increase the contact area, thereby increasing the friction force, reducing the risk of separation of the first injection molding structure and the second injection molding structure in double-color injection molding, and enhancing the combination firmness and reliability of the product.

[0061] It should be noted that the above-mentioned order of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And the above describes the specific embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than the order in which they are recited and still achieve desirable results. In addition, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous or necessary.

[0062] Each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0063] A person of ordinary skill in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by program instructing relevant hardware to complete, and the program can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk.

[0064] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An injection molded part, characterized in that, The utility model relates to a first injection structure (10) and a second injection structure (20) are provided. The first injection structure (10) is formed before the second injection structure (20). The first injection structure (10) has a first contact surface, and the second injection structure (20) has a second contact surface. The first contact surface and the second contact surface are in contact during the injection process. The edge of the contact part of the first contact surface and the second contact surface is provided with a relief structure (30).

2. Injection-molded part according to claim 1, characterized in that The cross-sectional profile of the relief structure (30) is one of stepped and arc-shaped.

3. The injection molded piece of claim 1, wherein, The first contact surface is provided with at least one protrusion (21), and the second contact surface is provided with at least one groove (11). The protrusion (21) and the groove (11) are in close contact. The first contact surface is provided with at least one groove (11), and the second contact surface is provided with at least one protrusion (21). The groove (11) and the protrusion (21) are in close contact.

4. Injection-molded part according to claim 3, characterized in that At least one protrusion (21) is arranged at a predetermined interval to form a first corrugated structure, and at least one groove (11) is arranged at a predetermined interval to form a second corrugated structure. The first corrugated structure and the second corrugated structure are matched and in close contact.

5. The injection molded piece of claim 1, wherein, The first injection structure (10) is provided with a predetermined number of first reinforcing ribs (12). The second injection structure (20) has a support surface (23), and the first reinforcing rib (12) abuts against the support surface (23).

6. Injection-molded part according to claim 5, characterized in that The second injection structure (20) is provided with a predetermined number of second reinforcing ribs (22). The predetermined number of second reinforcing ribs (22) are arranged on the support surface (23).

7. Injection-molded part according to claim 6, characterized in that The thickness of the first reinforcing rib (12) is 1mm to 5mm. The thickness of the second reinforcing rib (22) is 1mm to 5mm.

8. The injection molded part of claim 1, wherein, The material of the first injection structure (10) is different from that of the second injection structure (20).

9. Injection-molded part according to claim 8, characterized in that The melting point of the material of the first injection structure (10) is greater than or equal to that of the second injection structure (20).

10. The injection molded part of claim 1, wherein, The material of the first injection structure (10) is acrylonitrile-butadiene-styrene plastic. The material of the second injection structure (20) is acrylonitrile-butadiene-styrene plastic.

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