Large-size narrow-edge frequency converter shell inverted injection molding mold

Abstract

The utility model belongs to mould technical field relates to a big size narrow edge frequency converter shell inverted type injection moulding forming mould. The utility model, including frequency converter shell forming lower mould and frequency converter shell forming upper mould, be equipped with injection part above frequency converter shell forming upper mould, be equipped with shell center forming inlay piece on frequency converter shell forming lower mould, be equipped with shell top auxiliary forming spare and can along the inverted type side auxiliary forming subassembly of approaching or far away shell center forming inlay piece one end sliding in frequency converter shell forming upper mould. The utility model in the using process, through adopting inverted type side auxiliary forming subassembly, will end and side part forming slider integrate in upper mould, break through lower mould space limit, can accurate control narrow edge shell's side hole, edge size, solve the forming defect of traditional positive dress slider because of the space shortage.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an inverted injection molding mold for a large-size narrow-sided frequency converter housing. Background Technology

[0002] In the field of industrial automation, frequency converters, as key control devices, require housings that meet the demands of high strength, high precision, and narrow bezel design to fit within compact installation spaces. Due to their unique structure, large-size narrow-bezel frequency converter housings present several technical challenges with traditional injection molding molds: Traditional molds often employ a "lower mold as the main component, upper mold as an auxiliary component" upright structure, with side molding sliders typically located in the lower mold and opened / closed via a lower mold drive mechanism. However, for narrow-bezel housings, the installation space for the side sliders is limited, easily leading to insufficient slider stroke or structural interference, making it difficult to accurately mold details such as side holes and narrow bezel steps. Furthermore, during the molding of large-size housings, the synchronization control of the lower mold sliders is difficult, easily causing deformation of the housing sidewalls and dimensional deviations due to uneven force distribution. In addition, traditional demolding mechanisms often rely on lower mold ejection, and uneven ejection force distribution can easily cause damage to the top or edges of the housing, resulting in a low yield rate. Therefore, there is an urgent need to design an inverted injection molding mold for large-size narrow-bezel frequency converter housings that can overcome these defects.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses an injection mold for a frequency converter housing [application number: 202421000302.4], which includes a base and an injection mold. A connecting plate is fixedly connected to the bottom of the base, and a hydraulic cylinder is movably installed on the top of the connecting plate. A hydraulic rod is provided at the bottom of the hydraulic cylinder, and a fixed plate is fixedly connected to the bottom of the hydraulic rod. A throttle is movably installed on the surface of the base. The extension and retraction of the hydraulic rod are controlled by the hydraulic cylinder. When the hydraulic cylinder drives the fixed plate to approach the connecting plate, the push rod at the top of the fixed plate moves inside the mounting groove, simultaneously pushing the housing inside the injection mold outward, facilitating demolding of the housing inside the injection mold. However, during the opening and closing process, the installation space of the side slider is still limited for narrow-sided housings, which can easily lead to insufficient slider stroke or structural interference. It also has the defects of difficulty in accurately molding details such as side holes and narrow-sided steps of the housing, and easy deformation and dimensional deviation of the housing sidewall due to uneven force. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a large-size, narrow-sided inverter housing inverted injection molding mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A large-size narrow-sided inverter housing inverted injection molding mold includes a lower mold for inverter housing and an upper mold for inverter housing. An injection molded part is disposed above the upper mold. A central molding insert for the housing is disposed on the lower mold. An auxiliary molding component for the top of the housing and an inverted side auxiliary molding assembly that can slide near or away from the central molding insert are disposed within the upper mold. A direct ejector through the central molding insert is disposed below the lower mold. An anti-deviation alignment component is disposed within the lower mold. The inverted side auxiliary molding assembly slides in conjunction with the anti-deviation alignment component.

[0007] In the aforementioned large-size narrow-sided inverter housing inverted injection molding mold, the inverted side auxiliary molding component includes two end inverted molding sliders and two side inverted molding sliders disposed in the upper mold of the inverter housing. The end inverted molding sliders and the side inverted molding sliders correspond to the positions of the central molding insert of the housing.

[0008] In the above-mentioned large-size narrow-side inverter housing inverted injection molding mold, the inner side of the side inverted molding slider has inverter side hole molding protrusion, the two end inverted molding sliders and the two side inverted molding sliders together form a molding cavity, and the housing center molding insert is located in the molding cavity.

[0009] In the above-mentioned large-size narrow-side inverter housing inverted injection molding mold, the anti-deviation alignment component includes several anti-deviation alignment guide blocks disposed in the lower mold of the inverter housing. The end inverted molding slider and the side inverted molding slider are slidably engaged with the guide strip of the anti-deviation alignment guide block.

[0010] In the above-mentioned large-size narrow-sided inverter housing inverted injection molding mold, the upper mold for forming the inverter housing is provided with an end slider positioning shaft and a side slider positioning shaft. The end inverted molding slider is slidably engaged with the end slider positioning shaft, and the side inverted molding slider is slidably engaged with the side slider positioning shaft.

[0011] In the above-mentioned large-size narrow-sided inverter housing inverted injection molding mold, the housing top auxiliary molding part includes a housing top auxiliary molding plate disposed in the upper mold of the inverter housing, and the housing top auxiliary molding plate is located directly above the housing center molding insert.

[0012] In the above-mentioned large-size narrow-sided inverter housing inverted injection molding mold, the upper mold of the inverter housing is provided with a molding plate groove, and the top auxiliary molding plate of the housing is located in the molding plate groove.

[0013] In the above-mentioned large-size narrow-sided inverter housing inverted injection molding mold, the straight ejector includes an ejector pin fixing slide plate disposed below the lower mold of the inverter housing, and the ejector pin fixing slide plate is provided with a plurality of straight ejector pins that pass through the central molding insert of the housing.

[0014] In the above-mentioned large-size narrow-sided inverter housing inverted injection molding mold, the injection molded part includes an injection main board disposed above the upper mold of the inverter housing.

[0015] In the above-mentioned large-size narrow-sided inverter housing inverted injection molding mold, the lower mold of the inverter housing is provided with four mold closing alignment rods, and the upper mold of the inverter housing is provided with four mold closing alignment holes. The mold closing alignment rods and the mold closing alignment holes are arranged opposite each other.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model adopts an inverted side auxiliary forming component, which integrates the end and side forming sliders into the upper mold, breaks through the space limitation of the lower mold, and can accurately control the side hole and edge size of the narrow shell, thus solving the forming defects caused by insufficient space in traditional upright sliders.

[0018] 2. This utility model achieves strict constraint on the movement trajectory of the slider through the sliding fit between the anti-deviation alignment component and the slider, and the precise positioning of the mold closing alignment rod and the alignment hole, thereby reducing the offset error during mold closing and forming processes and ensuring the dimensional stability of large-size shells.

[0019] 3. The direct ejector in this utility model penetrates the central forming insert of the shell, and the ejection force acts directly on the central area of ​​the bottom of the shell. Combined with the opening action of the upper mold slider, it avoids deformation or damage caused by uneven force on the shell during demolding, and improves the product qualification rate.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] Figure 3 This is a partial structural schematic diagram of the present invention.

[0024] Figure 4 This is a partial structural schematic diagram of another aspect of this utility model.

[0025] Figure 5 This is a partial structural schematic diagram of another aspect of this utility model.

[0026] Figure 6 This is a schematic diagram of the upper mold for forming the inverter housing.

[0027] In the diagram: 1. Lower mold for inverter housing; 2. Upper mold for inverter housing; 3. Injection part; 4. Center molding insert for housing; 5. Top auxiliary molding part for housing; 6. Inverted side auxiliary molding assembly; 7. Ejector ejector; 8. Anti-deviation alignment part; 9. End inverted molding slider; 10. Side inverted molding slider; 11. Side hole molding protrusion for inverter; 12. Anti-deviation alignment guide slider; 13. End slider positioning shaft; 14. Side slider positioning shaft; 15. Top auxiliary molding plate for housing; 16. Molding plate groove; 17. Ejector fixing slide plate; 18. Ejector ejector rod; 19. Main injection plate; 20. Mold closing alignment rod; 21. Mold closing alignment hole. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1-6 As shown, an inverted injection molding mold for a large-size narrow-sided inverter housing includes a lower mold 1 and an upper mold 2 for the inverter housing. An injection molded part 3 is provided above the upper mold 2. A housing center molding insert 4 is provided on the lower mold 1. An auxiliary molding part 5 for the top of the housing and an inverted side auxiliary molding component 6 that can slide near or away from the housing center molding insert 4 are provided inside the upper mold 2. A straight ejector 7 that passes through the housing center molding insert 4 is provided below the lower mold 1. An anti-deviation alignment component 8 is provided inside the lower mold 1. The inverted side auxiliary molding component 6 and the anti-deviation alignment component 8 are slidably engaged.

[0030] In this embodiment, the mold includes a lower mold 1 for forming the inverter housing and an upper mold 2 for forming the inverter housing. An injection molded part 3 is fixed to the top of the upper mold 2 for injecting molten material into the molding cavity. A housing center molding insert 4 is raised on the surface of the lower mold 1, serving as the molding core for the internal structure of the housing. An auxiliary molding part 5 for the top of the housing is embedded inside the upper mold 2, corresponding vertically to the housing center molding insert 4, jointly forming the top and internal contour of the housing. An inverted side auxiliary molding assembly 6 is slidably installed on the inner side of the upper mold 2, which can move along the direction close to or away from the housing center molding insert 4. The upper mold moves horizontally to achieve the forming and demolding of the shell sidewall; the lower mold 1 has a fixed anti-deviation alignment component 8, whose protruding structure slides in conjunction with the groove of the inverted side auxiliary forming component 6 to limit the slide displacement; the lower mold 1 is equipped with a straight ejector demolding component 7, whose ejector rod passes through the forming insert 4 in the center of the shell and is used to eject the product after forming. Through the inverted design of the upper mold integrating the side forming component, the space limitation of the traditional lower mold slide is broken, providing sufficient stroke for the forming of the narrow shell sidewall. At the same time, the cooperation between the anti-deviation alignment component and the straight ejector demolding component ensures the forming accuracy and demolding reliability.

[0031] Combination Figure 1-6 As shown, the inverted side auxiliary molding assembly 6 includes two end inverted molding sliders 9 and two side inverted molding sliders 10 disposed in the upper mold 2 for molding the inverter housing. The end inverted molding sliders 9 and the side inverted molding sliders 10 correspond to the positions of the housing center molding insert 4, respectively.

[0032] Specifically, the inverted side auxiliary forming component 6 includes two end inverted forming sliders 9 and two side inverted forming sliders 10, all of which are installed on the inner side of the upper mold 2 via slide rails. The end inverted forming sliders 9 correspond to the two ends in the length direction of the shell, and the side inverted forming sliders 10 correspond to the two sides in the width direction of the shell. The positions of all four are adapted to the contour of the central forming insert 4 of the shell. By setting the end and side sliders in different areas, the side wall structure in different directions of the shell can be formed in a targeted manner, avoiding the problem of the overall slider size being too large and improving the flexibility of slider movement.

[0033] Combination Figure 3 , Figure 4 As shown, the inner side of the side inverted molding slider 10 has a frequency converter side hole molding protrusion 11, and the two end inverted molding sliders 9 and the two side inverted molding sliders 10 together form a molding chamber, and the housing center molding insert 4 is located in the molding chamber.

[0034] In this embodiment, the side-mounted inverted molding slider 10 is provided with a frequency converter side hole molding protrusion 11 protruding on the inner side of the housing center molding insert 4, which matches the hole structure of the housing side wall. When the mold is closed, the two end inverted molding sliders 9 are moved inward and attached to the two ends of the housing center molding insert 4, and the two side-mounted inverted molding sliders 10 are moved inward and attached to the two sides of the housing center molding insert 4. The four of them, together with the housing center molding insert 4 and the housing top auxiliary molding part 5, together form a closed molding chamber. After the molten material is injected, it is cooled and formed into a frequency converter housing. The molding chamber formed by the sliders is completely adapted to the product contour. The side hole molding protrusion is directly integrally formed into the side hole, avoiding subsequent secondary processing. At the same time, the enclosed structure ensures that the side wall thickness is uniform.

[0035] The anti-deviation alignment component 8 includes a plurality of anti-deviation alignment guide blocks 12 disposed in the lower mold 1 for forming the inverter housing. The end inverted forming slider 9 and the side inverted forming slider 10 are slidably engaged with the guide strips of the anti-deviation alignment guide blocks 12.

[0036] In this embodiment, the anti-deviation alignment component 8 includes four anti-deviation alignment guide blocks 12, which are respectively fixed on the surface of the lower mold 1 near the four blocks. The top of the guide block is provided with a long strip-shaped guide strip. The bottom of the end inverted molding block 9 and the side inverted molding block 10 is provided with a groove that matches the guide strip. When the mold is closed and the block moves, the groove slides along the guide strip. The sliding fit between the guide block and the block forms a rigid constraint to prevent the block from shifting laterally due to the injection pressure, ensuring the side wall forming dimensional accuracy and solving the problem of flash caused by the easy deviation of the block in traditional molds.

[0037] Combination Figure 5-6 As shown, the inverter housing forming upper mold 2 is provided with an end slider positioning shaft 13 and a side slider positioning shaft 14. The end inverted forming slider 9 is slidably engaged with the end slider positioning shaft 13, and the side inverted forming slider 10 is slidably engaged with the side slider positioning shaft 14.

[0038] In this embodiment, the upper mold 2 has an end slider positioning shaft 13 and a side slider positioning shaft 14 fixed inside. The end slider positioning shaft 13 is arranged along the length direction of the shell and passes through the shaft hole of the end inverted forming slider 9. The side slider positioning shaft 14 is arranged along the width direction of the shell and passes through the shaft hole of the side inverted forming slider 10. When the slider moves, the shaft hole slides along the positioning shaft. The positioning shaft further limits the movement trajectory of the slider and forms a "two-way constraint" with the anti-deviation alignment guide slider to ensure the straightness of the slider movement. It is especially suitable for the stable driving of large-size sliders.

[0039] The auxiliary molding component 5 at the top of the housing includes a housing top auxiliary molding plate 15 disposed in the upper mold 2 for molding the inverter housing. The housing top auxiliary molding plate 15 is located directly above the central molding insert 4 of the housing. The upper mold 2 for molding the inverter housing is provided with a molding plate groove 16, and the housing top auxiliary molding plate 15 is located in the molding plate groove 16.

[0040] In this embodiment, the auxiliary molding component 5 at the top of the housing includes an auxiliary molding plate 15 at the top of the housing, the shape of which is consistent with the top contour of the inverter housing; the bottom of the upper mold 2 is provided with a molding plate groove 16, and the auxiliary molding plate 15 at the top of the housing is fixed in the groove by bolts and is located directly above the molding insert 4 at the center of the housing. When the mold is closed, it forms a molding space at the top of the housing with the top of the insert. The molding plate groove ensures the installation accuracy of the top auxiliary molding plate, and the corresponding upper and lower structures ensure the flatness of the top of the housing, avoiding the problem of uneven molding at the top of the traditional mold.

[0041] Combination Figure 1-5 As shown, the direct ejector demolding component 7 includes an ejector rod fixing slide plate 17 disposed below the lower mold 1 for forming the inverter housing. The ejector rod fixing slide plate 17 is provided with a plurality of direct ejector rods 18 that pass through the central forming insert 4 of the housing.

[0042] In this embodiment, the direct ejector demolding component 7 includes an ejector pin fixing slide plate 17 and four direct ejector demolding rods 18. The ejector pin fixing slide plate 17 is installed on the hydraulic drive mechanism below the lower mold 1. The direct ejector demolding rods 18 are vertically fixed to the surface of the ejector pin fixing slide plate 17. Their top ends penetrate the through holes of the lower mold 1 and the central forming insert 4 of the shell. The top ends are flush with the bottom of the forming cavity. The ejector pin fixing slide plate ensures that the multiple demolding rods move synchronously and the ejection force is evenly applied to the center of the bottom of the shell. This, combined with the action of the upper mold slider demolding first, avoids deformation caused by excessive force on the edge of the shell.

[0043] Combination Figure 1 , Figure 2 As shown, the injection molded part 3 includes an injection molding main board 19 disposed above the upper mold 2 for forming the inverter housing. The lower mold 1 for forming the inverter housing is provided with four mold closing alignment rods 20. The upper mold 2 for forming the inverter housing is provided with four mold closing alignment holes 21. The mold closing alignment rods 20 and the mold closing alignment holes 21 are arranged opposite each other.

[0044] In this embodiment, the injection molding main board 19 of the injection molded part 3 is fixed to the top of the upper mold 2 by bolts, and its internal flow channel is connected to the feed port of the upper mold 2 to realize the stable injection of molten material into the molding cavity; four mold closing alignment rods 20 are vertically fixed at the four corners of the surface of the lower mold 1, and four mold closing alignment holes 21 are provided at the corresponding positions of the upper mold 2. When the mold is closed, the alignment rods 20 are inserted into the alignment holes 21 to achieve precise alignment of the upper and lower molds.

[0045] The working principle of this utility model is as follows:

[0046] When the mold is closed, the upper mold 2 moves downward, and the mold closing alignment rod 20 inserts into the mold closing alignment hole 21 to achieve precise positioning. At the same time, the end inverted forming slider 9 and the side inverted forming slider 10 in the upper mold 2 slide inward along the anti-deviation alignment guide slider 12 and the positioning shafts 13 and 14 under the action of the drive mechanism. They surround the housing center forming insert 4 and the housing top auxiliary forming plate 15 to form a closed forming chamber. The molten material is injected into the forming chamber through the flow channel of the injection molding main plate 19. Under the action of pressure, the cavity is filled and solidified to form the inverter housing blank. When the mold needs to be opened, the upper mold 2 moves upward, driving the end and side inverted forming sliders 9 and 10 to slide outward along the guide slider and the positioning shaft, separating from the housing side wall (the side hole forming protrusion separates from the side hole). Subsequently, the ejector pin fixing slide plate 17 below the lower mold 1 drives the straight ejector pin 18 to move upward, passing through the housing center forming insert 4 and ejecting the housing blank to complete the demolding. Finally, the slider and ejector pin are reset to prepare for the next molding cycle.

[0047] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0048] Although this document frequently uses terms such as inverter housing forming lower mold 1, inverter housing forming upper mold 2, injection molded part 3, housing center forming insert 4, housing top auxiliary forming part 5, inverted side auxiliary forming assembly 6, direct ejector demolding part 7, anti-deviation alignment part 8, end inverted forming slider 9, side inverted forming slider 10, inverter side hole forming protrusion 11, anti-deviation alignment guide slider 12, end slider positioning shaft 13, side slider positioning shaft 14, housing top auxiliary forming plate 15, forming plate groove 16, ejector pin fixing slide plate 17, direct ejector demolding rod 18, injection molding main plate 19, mold closing alignment rod 20, mold closing alignment hole 21, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A large-size narrow-sided inverter housing inverted injection molding mold, comprising a lower mold (1) for inverter housing molding and an upper mold (2) for inverter housing molding, characterized in that, The upper mold (2) for forming the inverter housing is provided with an injection molded part (3), the lower mold (1) for forming the inverter housing is provided with a housing center forming insert (4), the upper mold (2) for forming the inverter housing is provided with a housing top auxiliary forming part (5) and an inverted side auxiliary forming component (6) that can slide along one end close to or away from the housing center forming insert (4), the lower mold (1) for forming the inverter housing is provided with a straight ejector (7) that passes through the housing center forming insert (4), the lower mold (1) for forming the inverter housing is provided with an anti-deviation alignment component (8), and the inverted side auxiliary forming component (6) slides in cooperation with the anti-deviation alignment component (8).

2. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to claim 1, characterized in that, The inverted side auxiliary forming assembly (6) includes two end inverted forming sliders (9) and two side inverted forming sliders (10) disposed in the upper mold (2) of the inverter housing. The end inverted forming sliders (9) and the side inverted forming sliders (10) correspond to the positions of the housing center forming insert (4).

3. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to claim 2, characterized in that, The inner side of the side inverted molding slider (10) has a frequency converter side hole molding protrusion (11), and the two end inverted molding sliders (9) and the two side inverted molding sliders (10) together form a molding chamber, and the housing center molding insert (4) is located in the molding chamber.

4. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to claim 3, characterized in that, The anti-deviation alignment component (8) includes several anti-deviation alignment guide blocks (12) disposed in the lower mold (1) of the inverter housing. The end inverted forming slider (9) and the side inverted forming slider (10) are in sliding cooperation with the guide strip of the anti-deviation alignment guide block (12).

5. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to claim 4, characterized in that, The inverter housing forming upper mold (2) is provided with an end slider positioning shaft (13) and a side slider positioning shaft (14). The end inverted forming slider (9) is slidably engaged with the end slider positioning shaft (13), and the side inverted forming slider (10) is slidably engaged with the side slider positioning shaft (14).

6. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to claim 1, characterized in that, The auxiliary molding component (5) at the top of the housing includes a housing top auxiliary molding plate (15) disposed in the upper mold (2) of the inverter housing, and the housing top auxiliary molding plate (15) is located directly above the housing center molding insert (4).

7. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to claim 6, characterized in that, The upper mold (2) for forming the inverter housing is provided with a forming plate groove (16), and the auxiliary forming plate (15) at the top of the housing is located in the forming plate groove (16).

8. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to claim 1, characterized in that, The direct ejector (7) includes an ejector pin fixing slide plate (17) located below the inverter housing forming lower mold (1), and the ejector pin fixing slide plate (17) is provided with a plurality of direct ejector pins (18) that pass through the housing center forming insert (4).

9. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to claim 1, characterized in that, The injection molded part (3) includes an injection molded main plate (19) disposed above the upper mold (2) for forming the inverter housing.

10. The inverted injection molding mold for a large-size narrow-sided frequency converter housing according to any one of claims 1-9, characterized in that, The lower mold (1) for forming the inverter housing is provided with four mold alignment rods (20), and the upper mold (2) for forming the inverter housing is provided with four mold alignment holes (21). The mold alignment rods (20) and the mold alignment holes (21) are arranged opposite each other.

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