An electric control box mold

Abstract

The utility model relates to mould technical field discloses a kind of electric control box mould, including cavity and core, the gap formed between two after cavity and core clamping is electric control box forming cavity;The core includes main core, and vice core is spliced on main core;Vice core has convex section;N positioning rib cavities are equipped on vice core, positioning rib cavity is communicated with electric control box forming cavity after clamping.This scheme designs traditional integral mould as modular combination structure, realizes the decoupling of core structure and local structure by the separate layout of main core and vice core.When the positioning rib height of electric control box fixed lettering plate is adjusted due to model change, only need to replace the corresponding size of vice core, without reprocessing whole mould, significantly reduce mould development cost and storage pressure;Vice core is designed as convex section structure, and the stability and bearing capacity of matching concave-convex of main core and vice core can be enhanced, effectively resist injection high-pressure inflation mould force, reduce flash and deformation, improve electric control box forming quality.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to an electrical control box mold. Background Technology

[0002] like Figure 1 and Figure 2 As shown, existing electrical control boxes 1 generally have positioning ribs 11 inside for fixing the printing plate. Traditional products have uniform rib height dimensions for all models due to their single specification, and can be mass-produced through a set of standardized molds, resulting in low cost and high efficiency.

[0003] However, with the continuous expansion of product lines and the increasing demand for customer customization, although the overall structure of different models of electrical control boxes remains unchanged, differences in the installation position of the printing plate or the marking content result in varying required positioning rib heights. To adapt to the production of products with such subtle differences, companies have to develop dedicated molds for each specification. Even if only a local rib height needs to be adjusted, the entire mold must be redesigned and manufactured. This not only significantly increases mold development costs and prolongs product introduction cycles but also reduces the flexibility and responsiveness of the production system. Especially in small-batch, multi-variety production models, frequent mold changes and customization lead to resource waste and increased equipment downtime, severely restricting capacity release and rapid market delivery capabilities. Utility Model Content

[0004] The present invention aims to provide an electrical control box mold to solve the technical problem of unreasonable structure of existing molds.

[0005] The basic solution provided by this utility model is as follows: an electrical control box mold, including a cavity and a core, the gap formed between the cavity and the core after mold closing is the electrical control box forming cavity; the core includes a main core and a secondary core assembled on the main core; the secondary core is provided with N positioning rib cavities, and the positioning rib cavities are connected to the electrical control box forming cavity after mold closing.

[0006] The working principle and advantages of this utility model are as follows: Compared to existing technologies, this solution designs the traditional integral mold into a modular combination structure. Through the separate layout of the main core and sub-core, it decouples the core structure from the local structures. When the height of the positioning ribs fixing the printing plate of the electrical control box is adjusted due to model changes, only the sub-core of the corresponding size needs to be replaced, eliminating the need to reprocess the entire mold. This significantly reduces mold development costs and storage pressure, allowing for rapid response to market product changes. Simultaneously, designing the sub-core with a convex cross-section structure, achieving a convex-concave fit with the main core, enhances the stability and load-bearing capacity of the mating surface, effectively resisting high-pressure mold expansion forces during injection molding, reducing flash and deformation, and improving the molding quality of the electrical control box. This structure also helps to disperse stress concentration, improving the local strength and service life of the mold.

[0007] The positioning structure of the sub-core and main core is further optimized, significantly improving the convenience of mold changing and the accuracy of repeated positioning. The sub-core adopts a multi-sub-core design, which divides the sub-core into independent units according to the distribution of positioning ribs. When only some positioning ribs among multiple positioning ribs change in height, some sub-cores can be replaced, greatly enhancing the modularity and flexible adjustment capability of the mold, giving full play to the advantages of the modular mold, reducing redundant development, reducing manufacturing and maintenance costs, and improving the production efficiency of rapid switching between multiple models of electrical control box. At the same time, the left and right concave-convex interlocking structure between sub-cores is designed, combined with the upper and lower concave-convex interlocking structure of the main core and sub-core, to improve the stability of the modular structure.

[0008] This solution's electrical control box mold design can significantly improve the flexibility of electrical control box production, support rapid mold change and multi-model compatible production, effectively shorten the introduction cycle of new electrical control box products, enhance the responsiveness to small-batch, customized electrical control box orders, balance manufacturing efficiency and economy, and provide sustainable process support for the serialization expansion of electrical control boxes. Attached Figure Description

[0009] Figure 1 Schematic diagram of the existing electrical control box Figure 1 ; Figure 2 Schematic diagram of the existing electrical control box Figure 2 ; Figure 3 This is a schematic diagram of the structure of an electrical control box mold provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the main core structure provided in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the secondary core provided in an embodiment of the present utility model; Figure 6 A schematic diagram of the structure of an electrical control box mold (including a base plate) provided in an embodiment of this utility model; Figure 7 This is a front view of the main core provided in an embodiment of the present utility model; Figure 8 A top view of the main core provided in an embodiment of this utility model; Figure 9 Right view of the main core provided in an embodiment of this utility model; Figure 10 A rear view of the main core provided in an embodiment of this utility model; Figure 11 Left view of the main core provided in an embodiment of this utility model; The markings in the accompanying drawings of the instruction manual include: electrical control box 1, positioning rib 11, core 2, main core 21, groove 211, main sub-core one 212, main sub-core two 213, main sub-core three 214, main sub-core four 215, main sub-core five 216, main sub-core six 217, auxiliary core 22, positioning rib cavity 221, protrusion 222, sub-core one 223, sub-core two 224, protrusion 2241, and base plate 3.

[0010] Detailed Implementation [A1] The following detailed explanation illustrates the specific implementation methods: The basic implementation examples are as follows: Figure 3 As shown: An electrical control box mold includes a cavity and a core 2. After the cavity and core 2 are closed, the gap formed between them is the forming cavity of the electrical control box 1. The core 2 includes a main core 21 and a secondary core 22 assembled on the main core 21. The secondary core 22 has a convex cross section. The secondary core 22 is provided with N positioning rib cavities 221. After the mold is closed, the positioning rib cavities 221 are connected to the forming cavity of the electrical control box 1.

[0011] Specifically, the cavity and core 2 are understood based on existing BMC injection molding technology, which is a technology well known to those skilled in the art, and will not be elaborated here.

[0012] In this embodiment, the secondary core 22 is assembled on one side of the top of the main core 21, as shown in the figure. Figure 3 As shown, by optimizing the positioning structure of the secondary core 22 and the main core 21, the ease of mold changing and the repeatability of positioning accuracy are significantly improved. The main core 21 has a length of 245-250mm, a width of 80-90mm, and a height of 180-190mm; the secondary core has a length of 100-130mm, a width of 20-22mm, and a height of 50-60mm, wherein the protrusion height of the convex section of the secondary core 22 is 3-5mm.

[0013] In this embodiment, as Figure 4 As shown, the side of the main core 21 that contacts the bottom surface of the secondary core 22 has a groove 211. The groove 211 is close to the inner side of the main core 21. The bottom surface of the secondary core 22 has a protrusion 222 that matches the groove 211. Figure 5 As shown, the secondary core 22 is joined together by inserting its protrusion 222 into the groove 211 of the main core 21. The width of the groove 211 is not less than half the width of the contact surface, ensuring both stability and load-bearing capacity during the joining process.

[0014] In this embodiment, as Figure 3 and Figure 4As shown, the convex cross-section of the secondary core 22 has chamfers on at least the outermost two sides. The chamfers at the outermost contact points of the concave-convex structure primarily aim to improve assembly processability, protect mating surfaces, and enhance alignment guidance capabilities. The chamfers can act as "guide ramps," actively guiding the secondary core 22 to smoothly slide into the main core 21 during the assembly of the main core 21 and the secondary core 22, preventing edge collisions or jamming due to minor misalignments, significantly improving assembly efficiency and ease of operation. Simultaneously, the chamfers effectively prevent sharp corner chipping or wear, protecting critical mating surfaces of the mold and extending its service life. Furthermore, the chamfers can accommodate minor machining errors, reducing the requirements for initial alignment accuracy and enhancing assembly tolerance, making them particularly suitable for modular mold systems requiring frequent disassembly and assembly.

[0015] In this embodiment, as Figure 5 As shown, the sub-core 22 is composed of several sub-cores with raised bottoms arranged side by side. The sub-core 22 has N+1 sub-cores, each with at least one molding groove; the molding grooves of two adjacent sub-cores are combined to form a positioning rib cavity 221. By designing different molding grooves, positioning rib cavities 221 of different heights are formed to adapt to the height variations of the positioning ribs 11 in the electrical control box 1 product. Furthermore, designing the positioning rib cavity 221 as a combination of two molding grooves offers several advantages compared to an integral cavity. First, the modular structure facilitates processing because the positioning rib cavity 221 is generally flat, with small raised structures at the bottom, and also requires customized numbering on the side of the positioning ribs 11. If an integral cavity were still used, the overall processing would be difficult and costly. The modular design allows for separate manufacturing, reducing process complexity. Second, it facilitates venting and demolding, improving molding efficiency and product consistency.

[0016] In this embodiment, the main core 21 and the secondary core 22 have corresponding mounting holes and are fixed together by positioning pins. This design of the assembly module uses a concave-convex structure to achieve initial engagement, followed by fixation with positioning pins, combining functional and technological advantages. The concave-convex structure enables rapid alignment and pre-positioning between modules, preventing assembly misalignment and improving assembly efficiency; furthermore, the addition of positioning pins ensures high-precision fit between components.

[0017] In this embodiment, all sub-cores are assembled side-by-side to form sub-core 22. At least the outermost sub-core has a protrusion that faces the protrusion of its adjacent sub-core. The protrusion of the adjacent sub-core has a recess that matches the protrusion. The two are assembled by inserting the protrusion of the outermost sub-core into the recess of its adjacent sub-core. Figure 5 As shown, there are four sub-cores: two middle sub-cores 1 (223) and two side sub-cores 2 (224). The width of the two middle sub-cores 1 (223) is greater than the width of the two side sub-cores 2 (224). Of course, the width can be adapted to the spacing requirements of the positioning ribs 11. The protrusions of the two outermost sub-cores 2 (224) have protrusions 2241 (as shown in the figure). Figure 5 (Dashed line illustration) The protrusions of the two adjacent middle sub-cores 223 have recesses that fit the protrusions 2241, and are joined by inserting the protrusions 2241 of the second sub-core 224 into the recesses of the first sub-core 223. Furthermore, the mounting holes for fixing the positioning pins are designed on the two middle sub-cores 223, while the two side sub-cores 224 do not have mounting holes.

[0018] The reason for the above design is that, while the protrusion 222 of the secondary core 22 and the groove 211 of the main core 21 achieve a concave-convex up-and-down engagement, the portion of the secondary core 22 located within the groove 211 of the main core 21 achieves a concave-convex left-and-right engagement through the protrusions 2241 of the two secondary cores 224 and the recessed portion of the middle secondary core 223, thus improving the stability of the assembled structure. At this point, after the two middle secondary cores 223 further ensure positioning accuracy through positioning pins, the two secondary cores 224 are limited by the two middle secondary cores 223. Combined with the concave-convex engagement of the two methods mentioned above, the positioning requirements are fully met, ensuring positioning accuracy. Therefore, there is no need to design mounting holes and positioning pins on the two secondary cores 224 to ensure positioning accuracy, avoiding component redundancy and over-design.

[0019] In this embodiment, the positioning rib cavity 221 has a plate-like structure, and the height of each positioning rib cavity 221 may be different or the same. The height can be 0-30mm, the width can be 13-15mm, and the thickness can be 1.5-3mm. At least one positioning rib cavity has a protruding portion at its bottom.

[0020] In this embodiment, as Figure 6 As shown, it also includes a base plate 3; four cores 2 arranged in a matrix on the base plate 3. Combined with BMC injection molding technology, it can achieve multiple productions from a single mold, improving production efficiency. More importantly, because the mold core of this solution adopts a modular design combining the main core 21 and the auxiliary core 22, it can also achieve parallel production of electrical control boxes 1 with different markings, interfaces, or structural differences in the same injection molding cycle, without frequent mold changes, significantly shortening the production cycle, reducing equipment downtime, and fully utilizing production capacity.

[0021] In this embodiment, as Figure 6 As shown, the four cores 2 are divided into two cores 2 on the left and two cores 2 on the right. The secondary cores 22 of the two cores 2 on the left face to one side, and the secondary cores 22 of the two cores 2 on the right face to the other side. The orientation of one side to the other side is as follows. Figure 6The definitions shown are as follows. Since this mold design utilizes BMC injection molding technology to form the electrical control box 1, and the improved modular mold can simultaneously produce the same type of electrical control box 1 or different types of electrical control boxes 1 (with the same main structure, the same or different types defined by whether the height of the positioning ribs 11 is the same), it is necessary to consider the differences in demolding direction, parting line position, gate arrangement, or ejection method. If all mold cores face the same direction, it may lead to demolding difficulties, undercuts, uneven filling, or flash. Through differentiated orientation design, the parting surface of each mold core can better conform to the geometric features of the electrical control box 1, ensuring smooth demolding; effectively avoiding structural interference, improving molding accuracy and surface quality; and optimizing the gating system layout to achieve balanced injection.

[0022] Furthermore, in this embodiment, the main core 21 includes main sub-core 1 212, main sub-core 213, main sub-core 3 214, main sub-core 4 215, main sub-core 5 216, and main sub-core 6 217, according to... Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 The layout shown is as follows. Other components are configured according to actual assembly requirements. The main core 1 212, main core 2 213, main core 3 214, main core 4 215, main core 5 216, and main core 6 217 are assembled into a prefabricated electrical control box structure.

[0023] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. An electrical control box mold, comprising a cavity and a core, wherein the gap formed between the cavity and the core after mold closing is the electrical control box forming cavity; characterized in that, The core includes the main core and the auxiliary core assembled on the main core; The secondary core has a convex cross section; the secondary core is provided with N positioning rib cavities, which are connected to the forming cavity of the electrical control box after the mold is closed.

2. The electrical control box mold according to claim 1, characterized in that, The secondary core is assembled on one side of the top of the main core.

3. The electrical control box mold according to claim 1, characterized in that, The main core has a groove on the side that contacts the bottom surface of the secondary core, and the groove is close to the inside of the main core; the bottom surface of the secondary core has a protrusion that matches the groove; the two are joined together by inserting the protrusion of the secondary core into the groove of the main core.

4. The electrical control box mold according to claim 1, characterized in that, The convex cross-section of the secondary core has chamfers on at least the outermost two sides.

5. The electrical control box mold according to claim 3, characterized in that, The secondary core is composed of several sub-cores with protrusions at the bottom arranged side by side.

6. The electrical control box mold according to claim 5, characterized in that, There are N+1 sub-cores, and each sub-core has at least one forming groove; the forming grooves of two adjacent sub-cores are combined to form a positioning rib cavity.

7. The electrical control box mold according to claim 5, characterized in that, At least the outermost sub-core protrusion has a projection toward its adjacent sub-core protrusion, which in turn has a recess that matches the projection. The two are joined together by inserting the projection of the outermost sub-core into the recess of its adjacent sub-core.

8. The electrical control box mold according to claim 1, characterized in that, The positioning rib cavities have a plate-like structure, and each positioning rib cavity may have a different or the same height.

9. The electrical control box mold according to claim 1, characterized in that, The main core and the auxiliary core have corresponding mounting holes and are fixed together by positioning pins.

10. The electrical control box mold according to claim 1, characterized in that, It also includes a base plate; the base plate has four cores arranged in a matrix, with two cores on the left and two cores on the right. The secondary cores of the two cores on the left face one side, and the secondary cores of the two cores on the right face the other side.

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