An injection molding die for processing automobile parts
By introducing a modular cooling mechanism into the injection molding mold, the problem of uneven cooling channels was solved, achieving uniform cooling of parts and convenient maintenance, thereby improving part quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI SENJUN PRECISION INJECTION MOLDING CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-06-12
AI Technical Summary
The existing injection molding mold has an uneven cooling channel design, which leads to uneven cooling of parts, affecting the injection cycle and part quality, and is also complicated and costly to maintain.
A cooling mechanism including first and second cooling components is designed. The first cooling component wraps around the molded area, and the second cooling component is located below it. Uniform cooling is achieved through a combination of irregularly shaped water pipes and condenser pipes. The modular design facilitates maintenance.
This achieves uniformity in the cooling process of parts, improves part quality and production efficiency, and reduces maintenance difficulty and cost.
Smart Images
Figure CN224348273U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of injection molding mold technology, specifically relating to an injection molding mold for processing automotive parts. Background Technology
[0002] Injection molding dies for automotive parts are considered core tools in the automotive manufacturing industry for producing plastic parts. A car consists of thousands of parts, many of which are plastic and rely on these molds for production. They are not arbitrarily created but meticulously designed and manufactured according to the shape, size, and performance requirements of the automotive parts. Typically, they consist of a moving mold and a fixed mold, with the precise fit between the two being fundamental to producing qualified parts. During injection molding, the mold is securely mounted on the injection molding machine. When the machine injects molten plastic into the mold cavity, the plastic flows and fills the cavity according to a pre-set shape. After a period of cooling and solidification, the flowing plastic transforms into the automotive plastic parts that meet the design requirements. Interior components, such as dashboards and door panels, directly affect the comfort and aesthetics of the car in terms of appearance and dimensional accuracy; some structural components, although hidden inside the car body, play a crucial role in the car's strength and stability. This type of mold has many notable features: high precision ensures that the size and shape of the parts meet strict standards; high efficiency enables automobile manufacturers to produce a large number of parts in a short time; and reusability reduces production costs.
[0003] In the actual use of injection molds, some molds have significant design flaws in their cooling channels, leading to a series of adverse consequences. As a key component of the mold cooling system, the rationality of the cooling channel design directly affects the efficiency of injection molding production and the quality of the parts. However, some molds have unscientific cooling channel layouts, resulting in uneven flow of cooling water within the mold. This uneven cooling significantly negatively impacts the injection molding cycle and part quality; when cooling is insufficient, the parts cannot fully cool and solidify within the mold. During demolding, because the parts are not yet fully cured, the adhesion force to the mold cavity is strong, making demolding very difficult. Forced demolding can not only cause scratches and tears on the part surface but also lead to deformation and warping defects due to uneven cooling shrinkage. These defects severely affect the dimensional accuracy and appearance quality of the parts, and may even cause the parts to fail to meet assembly requirements, becoming scrap. Conversely, if cooling is excessive, the difference in cooling rates between the part surface and interior will generate significant stress within the part. This internal stress can easily cause cracking and breakage of parts during subsequent use, significantly affecting their mechanical properties and service life. Furthermore, mold maintenance is quite difficult. Molds typically have complex structures containing numerous precision parts. Disassembling and repairing molds requires specialized techniques and tools. For high-precision molds, maintenance demands extremely high skill levels from technicians. Due to the scarcity of skilled personnel, maintenance costs remain high, and the lengthy repair process undoubtedly increases production costs and reduces production efficiency for enterprises. Utility Model Content
[0004] The purpose of this utility model is to provide an injection molding die for processing automotive parts, so as to solve the problem of insufficient cooling effect of existing injection molding dies mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection molding mold for automotive parts processing, comprising a bottom mold; an upper mold disposed directly above the bottom mold; an injection port connected to the upper mold; the bottom mold having an internal cavity, and a cooling mechanism disposed within the cavity, the cooling mechanism comprising: a first cooling component placed within the cavity of the bottom mold and surrounding the molding area of the bottom mold, thereby achieving uniform cooling of the molding area through the surrounding method; a second cooling component also placed within the cavity of the bottom mold, the second cooling component being directly below the first cooling component, with a gap between the two, thereby achieving a reduction in the internal temperature of the bottom mold through the second cooling component, thus selectively activating to accelerate the cooling speed; the second cooling component passing through the area of the first cooling component ensures that the second cooling component can also comprehensively cool the first cooling component.
[0006] Preferably, the bottom of the cavity of the bottom mold is open, and a base plate is installed at the bottom end of the bottom mold. The base plate has the same cross-section as the bottom end of the bottom mold, so that the bottom end face of the bottom mold can be completely closed by the base plate, and it can be easily opened in later maintenance.
[0007] Preferably, an inner frame is provided inside the cavity of the bottom mold, and the bottom end of the inner frame is fixed to the top surface of the bottom plate. The first cooling component and the second cooling component are both placed inside the inner frame, thereby realizing modular installation and enabling quick and convenient disassembly and assembly during maintenance.
[0008] Preferably, the first cooling assembly is provided in multiple groups. Each group of the first cooling assembly includes multiple layers of external water pipes and irregularly shaped water pipes connecting the external water pipes. The irregularly shaped water pipes and the external water pipes are distributed in an alternating pattern. The internal area of the irregularly shaped water pipes and the external water pipes is the injection molding area of the bottom mold. Through this structure, the injection molding area of the bottom mold can be completely wrapped, thereby achieving uniform cooling of the injection molding area. Each group of the first cooling assembly has two connecting pipes connected to the external water pipes. Each connecting pipe is connected to an independent cold water pipe at its end. Cooling water is injected through one of the cold water pipes, and the cooled water is discharged through the other cold water pipe, thereby achieving the effect of circulating cooling.
[0009] Preferably, the second cooling component is a condenser pipe, which is not in contact with the irregularly shaped water pipe. The cold air generated by the condenser pipe can reduce the temperature inside the inner frame, thereby increasing the cooling speed of the injection molding area.
[0010] Preferably, the bottom surface of the bottom mold is provided with a through hole one for the cold water pipe to pass through and a through hole two for the condenser pipe to pass through.
[0011] Preferably, guide posts are installed at the four corners of the bottom mold, and the guide posts are connected through the upper mold. The bottom mold and the upper mold are connected and installed through the guide posts, and the vertical lifting and lowering of the upper mold is ensured.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] In this invention, the cooling water channels inside the injection mold are redesigned, and a cooling mechanism is added, enabling the cooling water to flow evenly through all areas of the mold along a preset path. This ensures that the temperature of each part drops at a consistent rate during the cooling process, thereby avoiding various quality defects caused by uneven cooling and significantly improving the quality of the parts. In addition, the entire cooling water channel adopts a modular design. In actual use, when it is necessary to maintain the cooling water channel, replace some components, or adjust the cooling effect, the staff only needs to operate on the corresponding module, without the need for large-scale disassembly and assembly of the entire mold. This greatly improves the convenience of disassembly and assembly, reduces the difficulty and cost of maintenance, and shortens the downtime of the mold. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a bottom view of the present invention after the base plate has been removed;
[0016] Figure 3 This is a schematic diagram of the structure of the first cooling component of this utility model;
[0017] Figure 4 This is a bottom view of the bottom mold of this utility model;
[0018] Figure 5 This is a top view of the bottom mold of this utility model.
[0019] In the picture:
[0020] 100. Bottom mold; 101. Guide post; 102. Through hole one; 103. Through hole two;
[0021] 200. Upper mold; 201. Injection port;
[0022] 300. Base plate; 301. Condenser pipe; 302. Cold water pipe; 303. Inner frame; 304. Irregular water pipe; 305. External water pipe; 306. Connecting pipe. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please see Figures 1 to 5 This utility model provides a technical solution: an injection molding die for processing automotive parts, comprising...
[0025] Bottom mold 100;
[0026] The upper mold 200 is located directly above the bottom mold 100; an injection port 201 is connected to the upper mold 200.
[0027] The bottom mold 100 has a cavity inside, and a cooling mechanism is provided inside the cavity. The cooling mechanism includes:
[0028] The first cooling component is placed inside the cavity of the bottom mold 100 and wraps around the outside of the molding area of the bottom mold 100. By wrapping it, the molding area can be cooled evenly.
[0029] The second cooling component is also placed inside the cavity of the bottom mold 100. The second cooling component is located directly below the first cooling component, and there is a gap between the two. The second cooling component reduces the internal temperature of the bottom mold 100, and can be selectively activated to accelerate the cooling speed. The second cooling component passes through the area of the first cooling component, ensuring that the second cooling component can also cool the first cooling component comprehensively.
[0030] In this embodiment, preferably, the bottom of the cavity of the bottom mold 100 is open, and a bottom plate 300 is also installed at the bottom end of the bottom mold 100. The bottom plate 300 has the same cross-section as the bottom end of the bottom mold 100, so that the bottom end of the bottom mold 100 can be completely closed by the bottom plate 300, and it can also be easily opened in later maintenance.
[0031] In this embodiment, preferably, an inner frame 303 is provided in the cavity of the bottom mold 100. The bottom end of the inner frame 303 is fixed to the top surface of the bottom plate 300. The first cooling component and the second cooling component are both placed in the inner frame 303, thereby realizing modular installation and enabling quick and convenient disassembly and assembly during maintenance.
[0032] In this embodiment, preferably, the first cooling assembly is provided in multiple sets. Each set of the first cooling assembly includes multiple layers of external water pipes 305 and irregularly shaped water pipes 304 connecting the external water pipes 305. The irregularly shaped water pipes 304 and the external water pipes 305 are distributed in an alternating pattern. The internal area of the irregularly shaped water pipes 304 and the external water pipes 305 is the injection molding area of the bottom mold 100. Through this structure, the injection molding area of the bottom mold 100 can be fully wrapped, thereby achieving uniform cooling of the injection molding area. Each set of the first cooling assembly has two connecting pipes 306 connected to the external water pipes 305. Each end of the connecting pipe 306 is connected to an independent cold water pipe 302. Cooling water is injected through one of the cold water pipes 302, and the cooled water is discharged through the other cold water pipe 302, thereby achieving the effect of circulating cooling.
[0033] In this embodiment, preferably, the second cooling component is a condenser pipe 301. The condenser pipe 301 and the irregular water pipe 304 do not contact each other. The cold air generated by the condenser pipe 301 can reduce the temperature inside the inner frame 303, thereby increasing the cooling speed of the injection molding area.
[0034] In this embodiment, preferably, the bottom surface of the bottom mold 100 is provided with a through hole 102 for the cold water pipe 302 to pass through, and a through hole 203 for the condenser pipe 301 to pass through.
[0035] In this embodiment, preferably, guide posts 101 are installed at the four corners of the bottom mold 100. The guide posts 101 are connected through the upper mold 200. The bottom mold 100 and the upper mold 200 are connected and installed through the guide posts 101, and the vertical lifting and lowering of the upper mold 200 is ensured.
[0036] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An injection molding die for processing automotive parts, comprising: Bottom mold (100); The upper mold (200) is located directly above the bottom mold (100); an injection port (201) is connected to the upper mold (200). Its features are: The bottom mold (100) has a cavity inside, and a cooling mechanism is provided inside the cavity. The cooling mechanism includes: The first cooling component is placed inside the cavity of the bottom mold (100) and surrounds the outside of the molding area of the bottom mold (100); The second cooling component is also placed in the cavity of the bottom mold (100). The second cooling component is located directly below the first cooling component, and there is a gap between the two. The second cooling component passes through the area of the first cooling component.
2. The injection molding die for processing automotive parts according to claim 1, characterized in that: The bottom of the cavity of the bottom mold (100) is open, and a base plate (300) is also installed at the bottom end of the bottom mold (100), the base plate (300) having the same cross-section as the bottom end of the bottom mold (100).
3. The injection molding die for processing automotive parts according to claim 2, characterized in that: An inner frame (303) is provided inside the cavity of the bottom mold (100). The bottom end of the inner frame (303) is fixed to the top surface of the bottom plate (300). The first cooling component and the second cooling component are both placed inside the inner frame (303).
4. The injection molding die for processing automotive parts according to claim 3, characterized in that: The first cooling assembly is provided in multiple groups. Each group of the first cooling assembly includes multiple layers of external water pipes (305) and irregular water pipes (304) connecting the external water pipes (305). The irregular water pipes (304) and the external water pipes (305) are distributed in an interlaced manner. The internal area of the irregular water pipes (304) and the external water pipes (305) is the injection molding area of the bottom mold (100). Two connecting pipes (306) are connected to the external water pipes (305) in each group of the first cooling assembly. Each connecting pipe (306) is connected to an independent cold water pipe (302) at its end.
5. The injection molding die for processing automotive parts according to claim 4, characterized in that: The second cooling component is a condenser tube (301), and the condenser tube (301) and the irregular water pipe (304) do not contact each other.
6. The injection molding die for processing automotive parts according to claim 5, characterized in that: The bottom surface of the bottom mold (100) is provided with a through hole one (102) for the cold water pipe (302) to pass through, and a through hole two (103) for the condenser pipe (301) to pass through.
7. The injection molding die for processing automotive parts according to claim 1, characterized in that: Guide pillars (101) are installed at the four corners of the bottom mold (100), and the guide pillars (101) are connected to the upper mold (200) through the mold.