Injection mold structure for manufacturing automobile protective plate
By designing multiple forming grooves and runner systems in the injection mold, and combining cooling and exhaust grooves, two workpieces are formed simultaneously in one mold, solving the problem of low production efficiency in the prior art and improving production efficiency and product quality.
Patent Information
- Application Number
- CN202422349696.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-25
AI Technical Summary
In the existing injection mold design, plastic workpieces of different shapes and sizes need to be formed separately, resulting in low production efficiency and low equipment utilization, which cannot meet large-scale and high-efficiency production needs.
An injection mold structure is designed, including a fixed mold and a moving mold. A multiple forming groove and a runner system are provided on the fixed mold, which can mold two different workpieces at the same time. Combined with the cooling system and exhaust groove design, it ensures uniform cooling of plastics and effective gas discharge, and improves production efficiency and product quality.
By forming two workpieces simultaneously in one mold, production efficiency is significantly improved, mold quantity and management cost are reduced, product molding quality and dimensional accuracy are ensured, bubble and shrinkage defects are reduced.
Smart Images
Figure CN223071854U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of molds, and particularly to an injection mold structure for manufacturing automobile fenders. Background Art
[0002] With the rapid development of the automotive industry, the manufacturing efficiency and quality of automotive parts have become key factors affecting the overall vehicle production efficiency and market competitiveness. In the production process of automotive parts, injection molding technology, with its advantages of high efficiency, precision, and automation, is widely used in the manufacturing of various parts with complex shapes and high-precision requirements. Especially for key components such as bumpers and brackets, injection molding technology can not only meet the design requirements of complex shapes but also ensure the dimensional accuracy and consistency of products, thereby improving the safety and appearance quality of the whole vehicle.
[0003] In the existing injection mold design, for matching plastic workpieces with different shapes and sizes (such as brackets for automotive bumpers), two independent molds are usually used for molding respectively. Although this traditional production method can ensure that each workpiece meets the design requirements, there are obvious efficiency bottlenecks in the actual production process. Specifically, only one workpiece can be injected each time, and after it cools and solidifies, the mold needs to be replaced to produce another workpiece, resulting in an extended overall production cycle, low equipment utilization rate, and inability to meet the large-scale and high-efficiency production requirements. Summary of the Utility Model
[0004] To facilitate the simultaneous production of two different plastic workpieces, this application provides an injection mold structure for manufacturing automobile fenders.
[0005] The injection mold structure for manufacturing automobile fenders provided by this application adopts the following technical solutions:
[0006] An injection mold structure for manufacturing automobile fenders includes a stationary mold and a moving mold. A stationary mold core is fixedly arranged on the stationary mold, and a moving mold core is fixedly arranged on the moving mold. A first molding groove and a second molding groove are formed on the stationary mold core, and a third molding groove and a fourth molding groove are formed on the moving mold core. The first molding groove and the third molding groove are combined to form a first cavity for molding one of the workpieces; the second molding groove and the fourth molding groove are combined to form a second cavity for molding the other workpiece.
[0007] A runner system is arranged on the stationary mold. The runner system includes a main runner, a first sub-runner, and a second sub-runner. One end of the first sub-runner is connected to one end of the main runner, and the other end of the main runner is connected to the first cavity; one end of the second sub-runner is connected to the main runner, and the other end of the second sub-runner is connected to the second cavity.
[0008] By adopting the above technical solutions, first, the moving mold and the fixed mold are closed through the mold clamping mechanism to ensure that the moving mold core and the fixed mold core are closely fitted, so that the first forming groove and the third forming groove form the first cavity, and the second forming groove and the fourth forming groove form the second cavity; the injection molding machine injects molten plastic into the mold through the runner system; the main runner guides the plastic to the first sub-runner and the second sub-runner. The first sub-runner injects the plastic into the first cavity, while the second sub-runner injects the plastic into the second cavity. These two processes can be carried out simultaneously to improve production efficiency; the plastic injected into the cavity cools and solidifies in the mold to form the required automotive fender parts. After cooling is completed, the mold is opened, and the moving mold and the fixed mold are separated; at this time, usually, the ejection mechanism pushes the solidified plastic part out of the cavity for part taking; compared with the molding of a single part, the production efficiency is significantly improved, and the production cost is reduced. By designing two cavities in one mold, the number of molds required is reduced, thereby reducing the cost of mold manufacturing and management.
[0009] Optionally, a cooling system is provided inside the fixed mold core, and the cooling system includes cooling water channels arranged around the first forming groove and the second forming groove.
[0010] By adopting the above technical solutions, the cooling water circulates through the cooling water channels arranged around the first forming groove and the second forming groove to ensure that the plastic can dissipate heat evenly and quickly during the solidification process; the temperature and flow rate of the cooling water can be adjusted according to needs to achieve the best cooling effect.
[0011] Optionally, the cooling system further includes a temperature controller for monitoring and adjusting the temperature of the cooling water channels.
[0012] By adopting the above technical solutions, the temperature controller can accurately monitor and adjust the temperature of the cooling water channels to ensure that the mold works under ideal temperature conditions, thereby improving the molding quality and dimensional accuracy of the product.
[0013] Optionally, the surfaces of the first forming groove and the second forming groove are both polished or coated.
[0014] By adopting the above technical solutions, the coating material usually has a high hardness, which can significantly improve the wear resistance of the mold surface and reduce the mold damage caused by friction and wear; the surface of the coated mold is smoother, which can reduce the surface defects of the injection molded product, such as burrs and hanging edges, and improve the aesthetics and quality of the product.
[0015] Optionally, a first exhaust groove is further opened on the fixed mold core, and the first exhaust groove is communicated with the first cavity.
[0016] By adopting the above technical solution, the first exhaust groove can effectively discharge the gas in the first cavity, significantly reducing defects such as air bubbles and shrinkage cavities in the plastic part, and improving the appearance quality and internal performance of the product.
[0017] Optionally, a second exhaust groove is provided on the moving mold core, and the second exhaust groove is in communication with the second cavity.
[0018] By adopting the above technical solution, the second exhaust groove can effectively discharge the gas in the second cavity, significantly reducing defects such as air bubbles and shrinkage cavities in the plastic part, and improving the appearance quality and internal performance of the product.
[0019] Optionally, both the first exhaust groove and the second exhaust groove are designed to be inclined or curved.
[0020] By adopting the above technical solution, the inclined or curved exhaust groove design can more effectively guide the gas flow in the cavity. During the injection molding process, as the plastic is filled, the air and volatile gases in the cavity will be pushed towards the exhaust groove. Due to the inclined or curved shape of the exhaust groove, these gases will be quickly discharged along a predetermined path instead of diffusing or accumulating disorderly in the cavity; compared with a straight exhaust groove, the inclined or curved exhaust groove can reduce the resistance of gas flow in some cases. This is because the inclined or curved design can form a smoother channel for the gas during the flow process, reducing the energy loss caused by sudden turning or obstruction.
[0021] Optionally, the depths of both the first exhaust groove and the second exhaust groove are less than the depths of the first forming groove and the second forming groove.
[0022] By adopting the above technical solution, the depths of the first exhaust groove and the second exhaust groove being less than the depths of the first forming groove and the second forming groove can improve the exhaust efficiency, reduce product defects, protect the mold and reduce production costs.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. First, the moving mold and the fixed mold are closed by the mold clamping mechanism to ensure that the moving mold core and the fixed mold core are closely fitted, so that the first forming groove and the third forming groove form the first cavity, and the second forming groove and the fourth forming groove form the second cavity; the injection molding machine injects molten plastic into the mold through the runner system; the main runner guides the plastic to the first sub-runner and the second sub-runner. The first sub-runner injects the plastic into the first cavity, while the second sub-runner injects the plastic into the second cavity. These two processes can be carried out simultaneously to improve production efficiency; the plastic injected into the cavity cools and solidifies in the mold to form the required automotive fender component. After cooling is completed, the mold is opened, and the moving mold and the fixed mold are separated; at this time, usually, the ejection mechanism pushes the solidified plastic part out of the cavity for part taking; compared with the molding of a single component, the production efficiency is significantly improved, and the production cost is reduced. By designing two cavities in one mold, the number of molds required is reduced, thus reducing the cost of mold manufacturing and management;
[0025] 2. The cooling water circulates through the cooling water channels, which are arranged around the first forming groove and the second forming groove to ensure that the plastic can dissipate heat evenly and quickly during the solidification process; the temperature and flow rate of the cooling water can be adjusted according to needs to achieve the best cooling effect;
[0026] 3. The temperature controller can accurately monitor and adjust the temperature of the cooling water channels to ensure that the mold works under ideal temperature conditions, thereby improving the molding quality and dimensional accuracy of the product. Description of the Drawings
[0027] Figure 1 is a schematic structural diagram of the injection mold structure for manufacturing an automotive fender in an embodiment of the present application.
[0028] Figure 2 is a schematic structural diagram of the fixed mold in an embodiment of the present application.
[0029] Figure 3 is a schematic structural diagram of the moving mold in an embodiment of the present application.
[0030] Figure 4 is a schematic structural diagram of the runner system in an embodiment of the present application.
[0031] Figure 5 is a schematic structural diagram of the cooling system in an embodiment of the present application.
[0032] Description of the Reference Numerals:
[0033] 1. Fixed mold; 2. Movable mold; 3. Fixed mold core; 31. First molding groove; 32. Second molding groove; 33. First exhaust groove; 4. Movable mold core; 41. Third molding groove; 42. Fourth molding groove; 43. Second exhaust groove; 5. Runner system; 51. Main runner; 52. First sub-runner; 53. Second sub-runner; 6. Cooling system; 61. Cooling water channel. Detailed implementation mode
[0034] The following will further elaborate on this application in conjunction with the attached Figures 1-5 drawings.
[0035] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which this application pertains. The "first", "second" and similar terms used in this application do not denote any order, quantity or importance, but are only used to distinguish different components.
[0036] This application embodiment discloses an injection mold structure for manufacturing an automotive fender. Referring to Figure 1 the drawings, the injection mold structure for manufacturing an automotive fender includes two main parts, namely a fixed mold 1 and a movable mold 2. Through precise cooperation of these two parts, automotive fender components that meet the requirements can be efficiently manufactured.
[0037] Referring to Figure 2 and Figure 3 the drawings, first, a fixed mold core 3 is fixedly arranged on the fixed mold 1, and a movable mold core 4 is correspondingly fixedly arranged on the movable mold 2. This setting method ensures that when the mold is closed, the fixed mold core 3 and the movable mold core 4 can be closely attached to form a cavity for molding the automotive fender.
[0038] Continuing to refer to Figure 2 and Figure 3 the drawings, specifically, a first molding groove 31 and a second molding groove 32 are opened on the fixed mold core 3, and a third molding groove 41 and a fourth molding groove 42 are opened on the movable mold core 4. When the movable mold 2 and the fixed mold 1 are closed, the first molding groove 31 and the third molding groove 41 are combined to form a first cavity, which is used to mold one automotive fender component; at the same time, the second molding groove 32 and the fourth molding groove 42 are combined to form a second cavity, which is used to mold another automotive fender component. This double-cavity design significantly improves production efficiency, enabling two automotive fender components to be produced simultaneously in one injection process.
[0039] Referring to Figure 4, The injection mold structure for manufacturing the car fender also has a runner system 5. The runner system 5 includes a main runner 51, a first sub-runner 52, and a second sub-runner 53, which together form a channel for the molten plastic to enter the cavity from the injection molding machine. Specifically, one end of the main runner 51 is connected to the outlet of the injection molding machine to receive the molten plastic injected from the injection molding machine, and the other end of the main runner 51 is respectively connected to the first sub-runner 52 and the second sub-runner 53. The first sub-runner 52 is further connected to the first cavity to inject the molten plastic into the first cavity; the second sub-runner 53 is connected to the second cavity to inject the molten plastic into the second cavity. This design of the runner system 5 ensures that the molten plastic can be filled into the two cavities evenly and quickly, thus improving the stability and efficiency of the injection molding process.
[0040] Refer to Figure 2 and Figure 5 , During the injection molding process, after the molten plastic is injected into the cavity through the runner system 5, it needs to be cooled and solidified in the mold to form the final car fender component. To ensure that the plastic can be cooled evenly and quickly, a cooling system 6 is specially provided inside the fixed mold core 3 of this embodiment. This cooling system 6 includes cooling water channels 61 arranged around the first molding groove 31 and the second molding groove 32. These water channels can effectively take away the heat generated during the solidification of the plastic through the circulating cooling water, thus ensuring that the plastic can be cooled evenly and quickly.
[0041] In addition, the cooling system 6 is also equipped with a temperature controller for precisely monitoring and adjusting the temperature of the cooling water channels 61 to ensure that the mold works under the optimal temperature conditions. This design not only improves the molding quality of the product but also extends the service life of the mold.
[0042] Refer to Figure 2 , To further improve the durability of the mold and the molding quality of the product, the surfaces of the first molding groove 31 and the second molding groove 32 of this embodiment have been polished or coated. This treatment method can significantly improve the surface finish and hardness of the mold, thereby reducing wear and scratches during the use of the mold. At the same time, the surface of the mold treated by polishing or coating can also reduce the frictional resistance with the molten plastic, enabling the plastic to fill into the cavity more smoothly, thus improving the molding quality and dimensional accuracy of the product.
[0043] Refer to Figure 2 and Figure 3, during the injection molding process, if the gas in the mold cavity cannot be discharged in time, it may form defects such as bubbles or shrinkage cavities during the plastic filling process, seriously affecting the appearance quality and internal performance of the product. To solve this problem, in this embodiment, a plurality of first exhaust grooves 33 are opened in the fixed mold core 3, and a plurality of second exhaust grooves 43 are opened on the moving mold core 4. The plurality of first exhaust grooves 33 communicate with the first cavity, and the plurality of second exhaust grooves 43 communicate with the second cavity, enabling the effective discharge of the gas in the mold cavity during the injection molding process. Specifically, the first exhaust groove 33 communicates with the first cavity and is used to discharge the gas in the first cavity; while the second exhaust groove 43 communicates with the second cavity and is used to discharge the gas in the second cavity. This design significantly reduces defects such as bubbles and shrinkage cavities in the plastic part, improving the appearance quality and internal performance of the product.
[0044] Continue to refer to Figure 2 and Figure 3 , it is worth noting that the first exhaust groove 33 and the second exhaust groove 43 of this embodiment are both designed to be inclined or curved. This design method can more effectively guide the gas flow in the mold cavity, enabling the gas to quickly discharge from the mold cavity along a predetermined path. Compared with the traditional straight exhaust groove design, the inclined or curved exhaust groove can reduce the resistance of gas flow and improve the exhaust efficiency in some cases. At the same time, this design can also prevent the gas from diffusing or accumulating disorderly in the mold cavity, further ensuring the molding quality of the product.
[0045] Continue to refer to Figure 2 and Figure 3 , in addition, to ensure that the exhaust groove can effectively discharge the gas without causing adverse effects on the product, in this embodiment, the depths of the first exhaust groove 33 and the second exhaust groove 43 are specifically designed to be less than the depths of the first molding groove 31 and the second molding groove 32. This design not only ensures the effective discharge of the gas but also avoids adverse effects on the molding quality and dimensional accuracy of the product due to the excessive depth of the exhaust groove. At the same time, the shallower exhaust groove is easier to process and maintain, reducing the manufacturing and maintenance costs of the mold.
[0046] The implementation principle of the above embodiments is as follows: First, the moving mold 2 and the fixed mold 1 are closed through the mold clamping mechanism to ensure that the moving mold core 4 and the fixed mold core 3 are closely fitted, so that the first molding groove 31 and the third molding groove 41 form the first cavity, and the second molding groove 32 and the fourth molding groove 42 form the second cavity; The injection molding machine injects molten plastic into the mold through the runner system 5; The main runner 51 guides the plastic to the first sub-runner 52 and the second sub-runner 53. The first sub-runner 52 injects the plastic into the first cavity, while the second sub-runner 53 injects the plastic into the second cavity. These two processes can be carried out simultaneously to improve production efficiency; The plastic injected into the cavity cools and solidifies in the mold to form the required automotive fender parts. The cooling process is controlled by the cooling system 6 built into the mold to ensure rapid and uniform cooling of the plastic; After cooling is completed, the mold is opened, and the moving mold 2 and the fixed mold 1 are separated; At this time, usually, an ejection mechanism pushes the solidified plastic part out of the cavity for part taking; Compared with the molding of a single part, the production efficiency is significantly improved, and the production cost is reduced. By designing two cavities in one mold, the number of molds required is reduced, thereby reducing the cost of mold manufacturing and management.
[0047] The above are all preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. An injection mold structure for manufacturing an automotive fender, characterized in that: It includes a fixed mold (1) and a movable mold (2). A fixed mold core (3) is fixedly arranged on the fixed mold (1), and a movable mold core (4) is fixedly arranged on the movable mold (2); a first molding groove (31) and a second molding groove (32) are formed on the fixed mold core (3), and a third molding groove (41) and a fourth molding groove (42) are formed on the movable mold core (4). The first molding groove (31) and the third molding groove (41) are combined to form a first cavity for molding one workpiece; the second molding groove (32) and the fourth molding groove (42) are combined to form a second cavity for molding another workpiece. A runner system (5) is arranged on the fixed mold (1). The runner system (5) includes a main runner (51), a first sub-runner (52) and a second sub-runner (53). One end of the first sub-runner (52) is communicated with one end of the main runner (51), and the other end of the main runner (51) is communicated with the first cavity; one end of the second sub-runner (53) is communicated with the main runner (51), and the other end of the second sub-runner (53) is communicated with the second cavity.
2. The injection mold structure for manufacturing an automobile fender according to claim 1, characterized in that: A cooling system (6) is arranged inside the fixed mold core (3). The cooling system (6) includes cooling water channels (61) arranged around the first molding groove (31) and the second molding groove (32).
3. The injection mold structure for manufacturing an automotive fender according to claim 2, characterized in that: The cooling system (6) further includes a temperature controller for monitoring and adjusting the temperature of the cooling water channels (61).
4. The injection mold structure for manufacturing an automobile fender according to claim 1 or 2, characterized in that: The surfaces of the first molding groove (31) and the second molding groove (32) are both polished or coated.
5. The injection mold structure for manufacturing an automobile fender according to claim 4, characterized in that: A first exhaust groove (33) is further formed on the fixed mold core (3), and the first exhaust groove (33) is communicated with the first cavity.
6. The injection mold structure for manufacturing an automotive fender according to claim 5, characterized in that: A second exhaust groove (43) is formed on the movable mold core (4), and the second exhaust groove (43) is communicated with the second cavity.
7. The injection mold structure for manufacturing an automotive fender according to claim 6, wherein: Both the first exhaust groove (33) and the second exhaust groove (43) are designed to be inclined or curved.
8. The injection mold structure for manufacturing an automotive fender according to claim 7, wherein: The depths of both the first exhaust groove (33) and the second exhaust groove (43) are smaller than the depths of the first molding groove (31) and the second molding groove (32).