Core structure for producing an automobile part, injection mold, and injection molding apparatus

Abstract

The utility model relates to related technical field of automobile parts provides a kind of for producing automobile parts's die structure, injection mold and injection equipment.Die structure includes first die, second die and 3D printing insert, first die is equipped with first cavity, first die and second die are oppositely movable, second die is equipped with second cavity, first cavity and second cavity are communicated to form die cavity, die cavity is used to form surface cover, 3D printing insert is located in first die, 3D printing insert is formed with functional position and conformal cooling waterway, conformal cooling waterway is arranged with functional position to avoid, conformal cooling waterway is arranged around the shape of 3D printing insert or along the structure trend of elbow area on 3D printing insert for forming surface cover, avoid the structure interference of ejector pin, exhaust insert and conformal cooling waterway, quickly take away the residual heat of product's elbow area, reduce the deformation shrinkage caused by heat residual after demoulding, to improve product forming quality.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive parts, and in particular to a mold core structure, injection mold, and injection molding equipment for producing automotive parts. Background Technology

[0002] Automotive parts, such as fuel filler caps or charging port caps, often have many reinforcing ribs in their bend areas. To address issues like smooth demolding and air trapping in the cavity, existing technologies typically employ optimized solutions such as adding ejector pins and venting inserts.

[0003] However, the above design hinders the effective layout of the water supply system in this area: due to the structural interference between the ejector pins and the venting inserts, the cooling channels cannot be arranged in a conventional manner. During actual production, heat accumulation easily occurs in this cavity area due to poor water flow, ultimately resulting in high residual heat in this type of product. After demolding, the elbow area of ​​this type of product is prone to deformation and shrinkage due to the residual heat, severely affecting the product molding quality. Utility Model Content

[0004] This utility model provides a mold core structure for producing automotive parts, which solves the problem in related technologies where the bent area of ​​such products is prone to deformation and shrinkage due to residual heat after demolding, seriously affecting the product molding quality.

[0005] This utility model provides a mold core structure for producing automotive parts, comprising:

[0006] The first mold core has a first cavity;

[0007] The second mold core is movable relative to the first mold core and the second mold core. The second mold core is provided with a second cavity. The first cavity and the second cavity are connected to form a mold cavity. The mold cavity is used to form a face cover.

[0008] A 3D printed insert is disposed on the first mold core and at least partially located within the first cavity. The 3D printed insert is used to form the bent area of ​​the faceplate. Functional positions and conformal cooling water channels are formed on the 3D printed insert. The functional positions are used to install ejector pins and / or venting inserts.

[0009] The conformal cooling water channel is arranged to avoid the functional position, and the conformal cooling water channel is arranged around the shape of the 3D printed insert or along the structural direction of the bend area on the 3D printed insert used for forming the face cover.

[0010] According to the present invention, a mold core structure for producing automotive parts is provided, wherein the conformal cooling water channel includes a cooling section arranged around the functional position.

[0011] According to the present invention, a mold core structure for producing automotive parts is provided, wherein the functional position includes a first through hole for mounting an ejector pin.

[0012] The conformal cooling water channel structure surrounds the first through hole and is arranged along the axial direction of the first through hole.

[0013] According to the present invention, a mold core structure for producing automotive parts is provided, wherein the functional position further includes a second through hole for installing an exhaust insert, and the first through hole and the second through hole are spaced apart.

[0014] The conformal cooling water channel section is located between the second through hole and the first through hole.

[0015] According to the present invention, a mold core structure for producing automotive parts is provided, wherein the inlet end and the outlet end of the conformal cooling water channel are both located on the same end face of the 3D printed insert.

[0016] According to the present invention, a mold core structure for producing automotive parts is provided, wherein the 3D printed insert is detachably connected to the first mold core.

[0017] According to the present invention, a mold core structure for producing automotive parts is provided, wherein the first mold core is provided with a positioning structure, the positioning structure being used to limit the relative movement of the 3D printed insert and the first mold core.

[0018] According to the present invention, a mold core structure for producing automotive parts is provided, wherein the 3D printed insert and the first mold core partially overlap in the thickness direction.

[0019] This utility model also provides an injection mold, comprising:

[0020] First template,

[0021] The second template, wherein the first mold core and the second mold core are relatively movable;

[0022] The aforementioned mold core structure for producing automotive parts has the first mold core disposed on the first template and the second mold core disposed on the second template.

[0023] This utility model also provides an injection molding device, including the above-mentioned injection mold.

[0024] The mold core structure for producing automotive parts provided by this utility model solves the following structural interference and heat accumulation problems through the flexible molding characteristics of 3D printed inserts: First, functional positions and conformal cooling water channels are designed on the 3D printed inserts. The functional positions are used to install ejector pins and / or venting inserts, while the conformal cooling water channels are set to avoid structural interference between the ejector pins, venting inserts and conformal cooling water channels. Second, the conformal cooling water channels are arranged around the shape of the 3D printed inserts or along the structural direction of the bend area of ​​the molded cover, precisely conforming to the cooling requirements, quickly removing residual heat from the bend area of ​​the product, reducing deformation and shrinkage caused by residual heat after demolding, thereby improving the product molding quality. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the cover provided by this utility model.

[0027] Figure 2 This is a schematic diagram of the mold core structure provided by this utility model.

[0028] Figure 3 This is an exploded view of the core structure provided by this utility model.

[0029] Figure 4 This is a schematic diagram of the first mold core and the 3D printed insert of the mold core structure provided by this utility model.

[0030] Figure 5 This is a schematic diagram of the structure of the 3D printed insert of the mold core structure provided by this utility model.

[0031] Figure 6 This is a schematic diagram of the structure of the 3D printed insert provided by this utility model.

[0032] Figure 7 This is a schematic diagram of the structure of the injection mold provided by this utility model.

[0033] Figure 8 This is a cross-sectional schematic diagram of the injection mold provided by this utility model.

[0034] Figure label:

[0035] 100. First mold core; 110. First cavity; 120. Positioning structure;

[0036] 200, Second mold core; 210, Second cavity; 300, 3D printed insert; 310, Functional position; 311, First through hole; 312, Second through hole; 320, Conformal cooling water channel; 321, Cooling section;

[0037] 400, First template; 500, Second template; A, Top cover; A1, Bend area. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] The following is combined Figures 1-8 This invention describes a mold core structure, injection mold, and injection molding equipment for producing automotive parts. It should be noted that, in this embodiment, automotive parts, such as a fuel filler cap A or a charging port cap A, are formed by injection molding using the mold core structure.

[0040] Understandably, referring to Figure 1 As shown in Figure 6, in some examples of this utility model, the mold core structure includes a first mold core 100 and a second mold core 200. The first mold core 100 is provided with a first cavity 110. The first mold core 100 and the second mold core 200 are relatively movable. The second mold core 200 is provided with a second cavity 210. The first cavity 110 and the second cavity 210 communicate to form a mold cavity. The mold cavity is used to mold automotive parts. The 3D printed insert 300 is provided on the first mold core 100, and the 3D printed insert 300 is at least partially located in the first cavity 110. The 3D printed insert 300 is used to mold the elbow area A1 of the cover A. The 3D printed insert 300 has a functional position 310 and a conformal cooling water channel 320. The functional position 310 is used to install ejector pins and / or venting inserts.

[0041] The conformal cooling water channel 320 is arranged to avoid the functional position 310. The conformal cooling water channel 320 is arranged around the shape of the 3D printed insert 300 or along the structural direction of the bend area A1 on the 3D printed insert 300 used for forming the cover A.

[0042] The mold core structure for producing automotive parts provided by this utility model solves the following structural interference and heat accumulation problems through the flexible molding characteristics of the 3D printed insert 300: First, a functional position 310 and a conformal cooling water channel 320 are designed on the 3D printed insert 300. The functional position 310 is used to install ejector pins and / or venting inserts. At the same time, the conformal cooling water channel 320 is set to avoid structural interference between the ejector pins, venting inserts and the conformal cooling water channel 320. Second, the conformal cooling water channel 320 is arranged around the shape of the 3D printed insert 300 or along the structural direction of the bend area A1 of the formed faceplate A, precisely fitting the cooling requirements, quickly removing the residual heat in the bend area A1 of the product, reducing deformation shrinkage caused by residual heat after demolding, thereby improving the product molding quality.

[0043] Understandably, referring to Figure 7 and Figure 8 In some examples of this utility model, the injection molding equipment includes the above-mentioned injection mold, the injection mold includes a first template 400, a second template 500 and the above-mentioned mold core structure for producing automotive parts, the first mold core 100 and the second mold core 200 are movable relative to each other, the first mold core 100 is disposed on the first template 400 and the second mold core 200 is disposed on the second template 500.

[0044] It can be understood that because the injection mold has the aforementioned mold core structure, it also has the same effect as the mold core structure. It should be noted that in this embodiment, there are multiple 3D printed inserts 300. Although the shapes of the multiple 3D printed inserts are different, the functions of the multiple 3D printed inserts 300 are the same. According to the bending area A1 forming part of the product, the multiple 3D printed inserts 300 are sequentially arranged on the first mold core 100.

[0045] Reference Figure 4 and Figure 5 In some examples of this utility model, the conformal cooling water channel 320 includes a cooling section 321, which is arranged around the functional position 310.

[0046] With the above configuration, the cooling section 321 is arranged around the functional position 310 (ejector / vent insert mounting position). This not only eliminates the interference between the ejector pin, vent insert and cooling water channel through structural avoidance, but also allows the cooling section 321 to accurately cover the elbow area A1 or its surroundings that is prone to heat accumulation, quickly remove residual heat, reduce deformation and shrinkage caused by residual heat after demolding, and thus improve the product molding quality.

[0047] Reference Figure 6 In some examples of this utility model, the functional position 310 includes a first through hole 311 for mounting a ejector pin; wherein, a portion of the conformal cooling water channel 320 surrounds the first through hole 311 and is arranged along the axial direction of the first through hole 311.

[0048] Specifically, in this embodiment, the cold water section surrounds the first through hole 311.

[0049] By adopting the above structure, the conformal cooling water channel 320 surrounds the first through hole 311 and extends along its axial direction. The close proximity of the cooling water channel around the first through hole 311 can specifically enhance the heat exchange efficiency of the ejector pin mounting area, reduce heat accumulation caused by frequent movement or local friction of the ejector pin, and reduce the risk of thermal expansion deformation of the ejector pin. In addition, the axial layout makes the cold water section of the conformal cooling water channel 320 consistent with the extension direction of the through hole, forming a uniform axial cooling gradient. This avoids the uneven circumferential cooling that may be caused by traditional annular water channels, thereby reducing the warping of the reinforcing ribs or backflow defects caused by thermal stress concentration in the bend area A1 of the molded product. The structural synergy between the conformal cooling water channel 320 and the first through hole 311 can optimize the overall thermal balance of the mold, ensuring the working stability of the ejector pin in high-temperature environments and extending the service life of key mold components, ultimately improving the efficiency of injection molding production and the consistency of product quality.

[0050] Reference Figure 6 In some examples of this utility model, the functional part 310 further includes a second through hole 312, which is used to install an exhaust insert, and the first through hole 311 and the second through hole 312 are spaced apart.

[0051] The conformal cooling water channel 320 is located between the second through hole 312 and the first through hole 311.

[0052] Of course, in some embodiments, the 3D printed insert 300 may also have venting grooves to accommodate the venting insert, which is not limited here.

[0053] By adopting the above configuration, the cold water section of the conformal cooling water channel 320 is arranged between the first through hole 311 of the ejector pin and the second through hole 312 of the venting insert, which can achieve dual-zone thermal management in a coordinated manner: it can suppress the overheating deformation of the ejector pin area caused by friction or melt contact, stabilize the temperature around the venting insert to ensure smooth venting, and shorten the cooling path to improve heat exchange efficiency, taking into account both the compactness of the mold structure and the reliability of its functions.

[0054] In some examples of this utility model, the inlet and outlet of the conformal cooling water channel 320 are located on the same end face of the 3D printed insert 300.

[0055] This can be understood as the above structure simplifying the assembly interface between the insert and the mold, requiring only a water channel interface to be reserved on a single end face, reducing the complexity of opening holes on multiple end faces, lowering the positioning difficulty and sealing failure risk during insert installation, and improving the overall compactness and reliability of the mold structure.

[0056] Concentration of the water flow path may enhance cooling uniformity: if the internal flow channel adopts a spiral, serpentine or other flow-around design, the entry and exit of a single end face can allow the water flow to pass through the entire length / thickness of the insert, extending the effective heat exchange path in a limited space, avoiding water flow short circuits caused by the separation of the two ends (such as insufficient cooling of the short flow channel area), thereby reducing the temperature difference at different positions of the insert and reducing forming defects such as deformation and shrinkage caused by local overcooling or overheating.

[0057] Specifically, in this embodiment, the 3D printed insert 300 is detachably connected to the first mold core 100.

[0058] The detachable connection allows damaged 3D printed inserts 300 to be removed individually for repair or replacement without affecting the main structure of the mold core, significantly reducing downtime for maintenance and lowering maintenance costs throughout the mold's lifecycle.

[0059] It is understandable that the above-mentioned detachable connection methods can be bolt connections, snap-fit ​​connections, etc.

[0060] Reference Figure 2 , Figure 3 and Figure 5 In some examples of this utility model, the first mold core 100 is provided with a positioning structure 120, which is used to limit the relative movement between the 3D printed insert 300 and the first mold core 100.

[0061] The positioning structure 120 restricts the relative movement of the 3D printed insert 300 and the first mold core 100, which can precisely constrain the position of the two during assembly (such as axial, radial or angular deviation), avoiding problems such as forming flash and dimensional deviation caused by misalignment; at the same time, its repeatability ensures that the insert can maintain the initial fit accuracy after multiple disassembly and assembly, reducing cumulative errors, ensuring the consistency of forming quality during production, and reducing debugging and rework costs.

[0062] Specifically, in this embodiment, the positioning structure 120 is a positioning groove provided on the first mold core 100, which limits the radial / axial movement range of the 3D printed insert 300 and avoids assembly misalignment. At the same time, the standardized structure of the positioning groove reduces the positioning difficulty of the 3D printed insert 300 and improves assembly efficiency and consistency. In addition, the mating surface between the positioning groove and the 3D printed insert 300 has high stability of repeated contact, and can maintain the initial positioning accuracy after multiple disassembly and assembly, reducing cumulative errors and ensuring the dimensional accuracy and quality stability of the molded product.

[0063] Of course, in other examples, the positioning structure 120 described above can also be a positioning protrusion or a positioning plate, without limitation.

[0064] Reference Figure 4 and Figure 5In some examples of this utility model, the 3D printed insert 300 and the first mold core 100 partially overlap in the thickness direction.

[0065] The design of the 3D printed insert 300 and the first mold core 100 overlapping in the thickness direction can enhance the rigidity of their connection through the overlapping area, reducing the risk of misalignment during assembly. At the same time, the overlapping part can serve as a positioning reference to improve assembly accuracy and reduce forming flash or dimensional deviation caused by relative displacement. In addition, the structure optimizes the material distribution, ensuring the strength requirements of key areas while avoiding redundant material waste, thus balancing functional realization and structural lightweighting.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mold core structure for producing automotive parts, characterized in that, include: The first mold core (100) has a first cavity (110); The second mold core (200) is movable relative to the first mold core (100). The second mold core (200) is provided with a second cavity (210). The first cavity (110) and the second cavity (210) are connected to form a mold cavity, which is used to form a faceplate (A). A 3D printed insert (300) is disposed on the first mold core (100) and the 3D printed insert (300) is at least partially located in the first cavity (110). The 3D printed insert (300) is used to form the elbow area (A1) of the faceplate (A). The 3D printed insert (300) has a functional position (310) and a conformal cooling water channel (320) formed on it. The functional position (310) is used to install ejector pins and / or venting inserts. The conformal cooling water channel (320) is arranged to avoid the functional position (310). The conformal cooling water channel (320) is arranged around the shape of the 3D printed insert (300) or along the structural direction of the bend area (A1) on the 3D printed insert (300) for forming the cover (A).

2. The mold core structure for producing automotive parts according to claim 1, characterized in that, The conformal cooling water channel (320) includes a cooling section (321) arranged around the functional position (310).

3. The mold core structure for producing automotive parts according to claim 1, characterized in that, The functional position (310) includes a first through hole (311) for mounting a ejector pin; The conformal cooling water channel (320) is partially structured around the first through hole (311) and is arranged along the axial direction of the first through hole (311).

4. The mold core structure for producing automotive parts according to claim 3, characterized in that, The functional position (310) further includes a second through hole (312), which is used to install an exhaust insert. The first through hole (311) and the second through hole (312) are spaced apart. The conformal cooling water channel (320) is located between the second through hole (312) and the first through hole (311).

5. The mold core structure for producing automotive parts according to claim 1, characterized in that, The inlet and outlet of the conformal cooling water channel (320) are both located on the same end face of the 3D printed insert (300).

6. The mold core structure for producing automotive parts according to claim 1, characterized in that, The 3D printed insert (300) is detachably connected to the first mold core (100).

7. The mold core structure for producing automotive parts according to claim 1, characterized in that, The first mold core (100) is provided with a positioning structure (120), which is used to limit the relative movement between the 3D printed insert (300) and the first mold core (100).

8. The mold core structure for producing automotive parts according to claim 1, characterized in that, The 3D printed insert (300) and the first mold core (100) partially overlap in the thickness direction.

9. An injection mold, characterized in that, include: First template (400) The second template (500) and the first mold core (100) and the second mold core (200) are relatively movable; The mold core structure for producing automobile parts according to any one of claims 1 to 8, wherein the first mold core (100) is disposed on the first template (400) and the second mold core (200) is disposed on the second template (500).

10. An injection molding machine, characterized in that, Including the injection mold as described in claim 9.

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