Automobile mold based on ductile iron and gray iron composite casting process

Abstract

The utility model discloses an automobile die based on ductile iron and gray iron composite casting technology, which relates to the technical field of automobile dies and comprises an upper die fixing plate and a lower die fixing plate, an upper die is arranged below the upper die fixing plate, a lower die is arranged on the lower die fixing plate, and a closed forming cavity is formed between the upper die and the lower die when the upper die and the lower die are clamped. A placement groove is formed in the lower mold, guide supporting structures are arranged on the two sides of the lower mold respectively, a positioning key groove is formed in the placement groove, an injection molding channel is formed in the lower mold and communicates with the forming cavity, and a heat conduction groove is formed in the upper mold and communicates with and wraps the upper portion of the forming cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile molds, in particular to an automobile mold based on a composite casting process of ductile iron and gray iron. Background Art

[0002] In the automotive manufacturing industry, molds are critical tools in the production process. Their performance and quality directly determine the precision, appearance, and durability of the final product. With the rapid development of the automotive industry, the requirements for mold materials, manufacturing processes, and design precision are increasing. Traditional single-material casting molds, such as pure gray iron molds, offer excellent casting performance and low cost. However, when subjected to high-temperature and high-pressure injection molding, they often suffer from insufficient strength, deformation, and poor wear resistance, making them difficult to meet the demand for high-precision, long-life molds. Traditional mold manufacturing often requires multiple steps, including individual casting and subsequent processing and assembly. With the rapid development of the automotive industry, the requirements for molds are also becoming increasingly stringent. Mold precision, quality, service life, and cost control have become key factors in determining product competitiveness. Automotive molds based on a composite casting process of ductile iron and gray iron can better meet these requirements and provide reliable support for automobile production. In summary, the proposed automotive mold based on a composite casting process of ductile iron and gray iron meets the automotive industry's requirements for mold performance, service life, and cost control. Utility Model Content

[0003] The utility model aims to solve the problems of easy deformation, rapid wear and low precision of traditional molds in the injection molding process, at least to a certain extent, through the composite casting process of ductile iron and gray iron, taking advantage of the high strength and high toughness of ductile iron and the good casting performance of gray iron. To this end, an automobile mold based on the composite casting process of ductile iron and gray iron is proposed.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an automobile mold based on a composite casting process of ductile iron and gray iron, the automobile mold based on the composite casting process of ductile iron and gray iron specifically includes an upper mold fixing plate and a lower mold fixing plate, an upper mold is arranged under the upper mold fixing plate, and a lower mold is arranged on the lower mold fixing plate. When the upper mold and the lower mold are engaged, a closed molding cavity is formed between the upper mold and the lower mold, a placement groove is arranged on the lower mold, and guide support structures are respectively provided on both sides of the lower mold. Positioning key grooves are arranged in the placement grooves, an injection channel is provided on the lower mold, and the injection channel is connected to the molding cavity. A heat conduction groove is provided in the upper mold, and the heat conduction groove is connected and covered above the molding cavity.

[0005] In a preferred embodiment of the present invention, a heating element is provided in the lower mold.

[0006] In a preferred embodiment of the present invention, a plurality of protrusions are provided on the bottom edge of the seating groove, and the height of the protrusions is smaller than the depth of the seating groove.

[0007] In a preferred embodiment of the present invention, a positioning block is provided at the lower portion of the upper die corresponding to the positioning key groove.

[0008] In a preferred embodiment of the present invention, the guide support structure includes a reinforcing rib and a support plate, the support plate is arranged on the lower mold fixing plate, and the reinforcing rib connects the support plate and the lower mold fixing plate.

[0009] In a preferred embodiment of the present invention, an exhaust hole is provided on the upper mold fixing plate, an exhaust groove is provided at the highest point of the molding cavity, and the exhaust groove is connected to the exhaust hole.

[0010] The beneficial effects of the present invention are as follows: after adopting the above structure, a composite casting process of ductile iron and gray iron is adopted, combining the high strength and high toughness of ductile iron with the good casting performance of gray iron, so that the mold is more stable in the process of high temperature and high pressure injection molding, reducing deformation and wear, thereby improving the durability and molding accuracy of the mold, and the heat conduction groove provided in the upper mold can effectively disperse the heat generated during the injection molding process. The placement groove and positioning keyway provided on the mold, in conjunction with the positioning block of the upper mold, realize the precise alignment of the mold and ensure the dimensional accuracy of the molded part. At the same time, the guide support structure enhances the overall rigidity and stability of the mold, prevents displacement and vibration during the injection molding process, and the injection molding channel provided on the lower mold is connected to the molding cavity, ensuring the smooth flow and rapid filling of the injection molding material. In summary, the automobile mold of the present invention based on the composite casting process of ductile iron and gray iron improves the durability, precision, thermal management efficiency, positioning stability and injection molding efficiency of the mold by optimizing the structural design, reduces production costs, improves product quality, and has significant technical progress and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of the utility model;

[0012] Figure 2 This is a front view structural diagram of the utility model;

[0013] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the utility model;

[0014] In the figure: 1 - upper mold fixing plate, 2 - lower mold fixing plate, 3 - upper mold, 4 - lower mold, 5 - molding cavity, 6 - placement groove, 7 - positioning keyway, 8 - injection channel, 9 - heat conduction groove, 10 - heating element, 11 - protrusion, 12 - positioning block, 13 - reinforcement rib, 14 - support plate, 15 - exhaust hole, 16 - exhaust groove. DETAILED DESCRIPTION

[0015] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0016] like Figure 1 - Figure 3 As shown, the automobile mold based on the composite casting process of ductile iron and gray iron specifically includes an upper mold fixing plate 1 and a lower mold fixing plate 2, an upper mold 3 is arranged under the upper mold fixing plate 1, and a lower mold 4 is arranged on the lower mold fixing plate 2. When the upper mold 3 and the lower mold 7 are engaged, a closed molding cavity 5 is formed between the upper mold 3 and the lower mold 4, a placement groove 6 is arranged on the lower mold 4, and guide support structures are respectively provided on both sides of the lower mold 4, a positioning key groove 7 is arranged in the placement groove 6, and an injection channel 8 is provided on the lower mold 4. 8 is connected to the molding cavity 5, and a heat conduction groove 9 is provided in the upper mold 3. The heat conduction groove 9 is connected and covered above the molding cavity 5. During implementation, the upper mold fixing plate 1 serves as the supporting structure of the upper mold 3 to ensure the stability and accuracy of the upper mold during the mold closing process, provide a solid supporting platform, and prevent the upper mold 3 from being displaced or deformed during the high-pressure injection molding process; the lower mold fixing plate 2 provides a solid supporting foundation for the lower mold 4, ensures the overall stability of the mold, and supports the lower mold 4 so that it can be accurately aligned and cooperate with the upper mold 3 to form a closed molding cavity. The upper mold 3 is made of ductile iron, which has good strength and wear resistance and is suitable for high-pressure injection molding environment. It cooperates with the lower mold 4 to form a molding cavity to shape the injection molding material. The lower mold 4 is made of gray iron and cooperates with the upper mold 3 to form a closed molding cavity 5, while carrying the injection and cooling process of the injection molding material; the molding cavity 5 ensures the shape and dimensional accuracy of the injection molding product. The space where the injection molding material is injected and cooled directly determines the final shape of the product. The placement groove 6 provides an installation position for the positioning keyway 7 and other accessories to enhance the assembly accuracy of the mold; the positioning keyway 7 and the positioning block 12 improve the alignment accuracy between the upper mold and the lower mold through precise cooperation to avoid misalignment; the injection channel 8 ensures that the injection molding material enters the molding cavity 5 evenly and quickly, and introduces the molten material into the molding cavity 5 for injection molding; the heat conduction groove 9 accelerates the heat dissipation in the molding cavity 5, improves the cooling efficiency, and promotes the rapid cooling and solidification of the injection molding material by covering the heat conduction groove 9 above the molding cavity 5.

[0017] like Figure 1 As shown, based on the above method, a heating element 10 is further provided in the lower mold 4. The heating element 10 provides heat when needed to ensure that the injection molding material is injected and cured at a suitable temperature, adjust the mold temperature, and adapt to the process requirements of different injection molding materials.

[0018] like Figure 1As shown, based on the above method, a plurality of protrusions 11 are further provided on the bottom edge of the placement groove 6. The height of the protrusion 11 is less than the depth of the placement groove 6. In implementation, the protrusion 11 can be used as a positioning point to help the components to be placed to find and fix them in the placement groove 6 accurately and quickly, reducing the misalignment and shaking of the components during the installation process. The protrusion 11 can increase the contact area between the placement groove 6 and the placement component, thereby enhancing the supporting force and bearing components with greater weight or vibration.

[0019] like Figure 3 As shown, based on the above approach, a positioning block 12 is further provided at the lower portion of the upper mold 3, corresponding to the positioning keyway 7. The positioning block 12, in conjunction with the positioning keyway 7, ensures precise alignment of the upper mold 3 with the lower mold or other related components during mold closing or assembly. The positioning block 12 effectively prevents offset, simplifies the mold assembly process, and improves production efficiency.

[0020] like Figure 3 As shown, on the basis of the above method, the guide support structure further includes a reinforcing rib 13 and a support plate 14, the support plate 14 is arranged on the lower mold fixing plate 2, and the reinforcing rib 13 connects the support plate 14 and the lower mold fixing plate 2; in specific implementation, the support plate 14 can effectively disperse the load acting on the lower mold 4, reduce the situation of excessive local force, and thus protect the mold structure from damage, the reinforcing rib 13 connects the support plate 14 and the lower mold fixing plate 2, resists stress concentration and deformation caused by factors such as injection pressure and temperature changes, and ensures the long-term service life of the mold.

[0021] like Figure 1 and Figure 2 As shown, based on the above method, a vent hole 15 is further provided on the upper mold fixing plate 1, and a vent groove 16 is provided at the highest point of the molding cavity 5, and the vent groove 16 is connected to the vent hole 15. The vent hole 15 and the vent groove 16 effectively remove air and excess gas from the molding cavity, avoiding product defects. During the injection molding process, the gas in the molding cavity 5 is discharged through the vent hole 15 and the vent groove 16, ensuring smooth filling of the injection molding material and the quality of the product.

[0022] During the specific operation of the automotive mold using the composite casting process of ductile iron and gray iron, ensure that the upper mold fixing plate 1 and the lower mold fixing plate 2 are securely installed, and that the upper mold 3 and the lower mold 4 are correctly installed and adjusted to the appropriate position. Check that the heating element 10 is in proper working condition to adjust the mold temperature to the optimal injection and curing temperature of the injection molding material. Check that the positioning block 12 and the positioning keyway 7 are accurately matched to ensure that the upper mold 3 and the lower mold 4 are accurately aligned when the molds are closed. Preheat the injection molding material to the appropriate injection molding temperature and prepare it for injection through the injection molding machine. Check that the injection path 8 is unobstructed to ensure that the injection molding material can smoothly enter the molding cavity 5. The upper mold 3, supported by the upper mold fixing plate 1, is accurately moved above the lower mold 4. The positioning block 12 and the positioning keyway 7 are precisely matched, so that the upper mold 3 and the lower mold 4 form a closed molding cavity 5. The molten injection molding material is injected into the molding cavity 5 under high pressure through the injection path 8. The exhaust holes 15 and exhaust grooves 16 remove air and excess gas from the molding cavity during the injection molding process, ensuring smooth filling of the injection molding material and avoiding product defects. The injection molding material cools and solidifies in the molding cavity 5. The heat conduction groove 9 accelerates the heat dissipation in the molding cavity 5, improves the cooling efficiency, and promotes the rapid cooling and solidification of the injection molding material. When the injection molding material is completely solidified, the upper mold 3 and the lower mold 4 are separated to form the required automotive mold components. The solidified injection molded product is removed from the molding cavity 5 for subsequent processing or inspection. Clean the mold to remove residual injection molding material and impurities to ensure the smooth progress of the next injection molding process. Check the wear of each component of the mold, and maintain and replace damaged components in a timely manner to extend the service life of the mold. The entire working process requires strict control of process parameters such as injection molding temperature, injection molding pressure, and cooling time to ensure the quality of the injection molded product and the long-term stable operation of the mold.

[0023] Throughout this specification, references to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0024] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims.

Claims

1. The automobile mold based on the composite casting process of ductile iron and gray iron is characterized by: The automobile mold based on the composite casting process of ductile iron and gray iron specifically includes an upper mold fixing plate and a lower mold fixing plate, an upper mold is arranged under the upper mold fixing plate, and a lower mold is arranged on the lower mold fixing plate. When the upper mold and the lower mold are engaged, a closed molding cavity is formed between the upper mold and the lower mold, a placement groove is provided on the lower mold, and guide support structures are respectively provided on both sides of the lower mold. Positioning key grooves are provided in the placement grooves, an injection channel is provided on the lower mold, and the injection channel is connected to the molding cavity. A heat conduction groove is provided in the upper mold, and the heat conduction groove is connected and covered above the molding cavity.

2. The automobile mold based on the composite casting process of ductile iron and gray iron according to claim 1 is characterized in that: A heating element is arranged in the lower mold.

3. The automobile mold based on the composite casting process of ductile iron and gray iron according to claim 1 is characterized in that: A plurality of protrusions are provided on the bottom edge of the placement groove, and the height of the protrusions is smaller than the depth of the placement groove.

4. The automobile mold based on the composite casting process of ductile iron and gray iron according to claim 1 is characterized in that: A positioning block is provided at the lower portion of the upper die corresponding to the positioning key slot.

5. The automobile mold based on the composite casting process of ductile iron and gray iron according to claim 1 is characterized in that: The guide support structure includes a reinforcing rib and a support plate, wherein the support plate is arranged on the lower mold fixing plate, and the reinforcing rib connects the support plate and the lower mold fixing plate.

6. The automobile mold based on the composite casting process of ductile iron and gray iron according to claim 1, characterized in that: An exhaust hole is provided on the upper mold fixing plate, and an exhaust groove is provided at the highest point of the molding cavity, and the exhaust groove is connected to the exhaust hole.

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