Mould for Rogowski coil square plastic box mutual inductor

Abstract

The utility model belongs to the field of injection molds, and particularly relates to a square plastic box mutual inductor mold for a Rogowski coil, which comprises a concave mold component, a convex mold component and an ejection component which are used for forming a mold cavity, the die cavity comprises a group of lower shell die cavities, the male die assembly comprises a male die bottom plate, a male die fixing seat, a lower shell male die and a first columnar die, the first columnar die is mounted on the male die bottom plate, the ejection assembly comprises an ejection fixing plate and a first ejection rod, and the ejection fixing plate is fixed on the lower shell male die. The first ejector rod is installed on the ejection fixing plate and matched with the lower shell male die, the first columnar die and the first ejector rod are arranged in a sleeved mode, the lower shell male die, the first columnar die, the first ejector rod and the female die assembly are matched to form a lower shell die cavity, a workpiece can be smoothly ejected out, and deformation of the workpiece is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection mold field, concretely relates to a kind of for square plastic box mutual inductor mould of Rogowski coil. BACKGROUND

[0002] At present, a Rogowski coil mutual inductor is designed, the shell thereof is a square box formed by inserting and buckling an upper shell and a lower shell, the upper shell and the shell have the same outer dimension, and there are narrow and deep gaps and thin protrusions on the upper shell and the lower shell, especially, a cylindrical hole is designed in the cavity of the upper shell, and a lower cylindrical hole is designed in the cavity of the lower shell, wherein a through hole is designed on the upper cylindrical hole, and a blind hole is designed on the lower cylindrical hole, thus causing difficulty in mold opening, and high precision and strength are required for the mold. On the other hand, the production mode of the traditional injection mold is one piece per mold or multiple pieces per mold, and the same parts are produced, which is low in mold utilization rate for the production and processing of the shell with the same outer dimension, but the shell with the same outer dimension but different internal structures is easily produced by one mold, which causes uneven pressure in the mold cavity and quality defects. SUMMARY

[0003] To solve the problems in the prior art, the utility model provides a Rogowski coil square plastic box mutual inductor mold, which can smoothly eject the parts and effectively prevent the parts from deforming.

[0004] The utility model adopts the specific technical scheme of:

[0005] A Rogowski coil square plastic box mutual inductor mold includes a recessed die assembly for forming a mold cavity, a male die assembly, and an ejection assembly, the male die assembly is provided with a shunt passage communicated with the mold cavity, and the recessed die assembly is provided with a sprue bush communicated with the shunt passage, and the key lies in that the mold cavity includes a group of lower shell mold cavities, the male die assembly includes a male die bottom plate, a male die fixing seat, a lower shell male die, and a first columnar die, the male die fixing seat is fixedly connected with the male die bottom plate, the lower shell male die is installed on the male die fixing seat, the first columnar die is installed on the male die bottom plate, the ejection assembly includes an ejection fixing plate and a first ejector rod, the first ejector rod is installed on the ejection fixing plate and is matched with the lower shell male die, the first ejector rod is provided with a through hole, the first columnar die is sleeved with the first ejector rod through the through hole, the first ejector rod is used to form the end face of the lower cylindrical hole, the first columnar die is used to form the blind hole of the lower cylindrical hole, and the lower shell male die, the first columnar die, the first ejector rod, and the recessed die assembly are matched to form the lower shell mold cavity.

[0006] The cavity further comprises a set of upper shell cavities, and the male die assembly further comprises upper shell male dies, which form the upper shell cavities in cooperation with the female die assembly.

[0007] The split flow channel is communicated with the upper shell cavities and the lower shell cavities through a latent gate.

[0008] The ejection assembly further comprises a second ejector pin installed on the ejection fixed plate, the upper end of the second ejector pin is a stepped end, the upper shell male die and the lower shell male die are respectively provided with installation holes for the second ejector pin, the stepped end and the installation holes form a cavity feeding channel, and the discharge port of the latent gate is communicated with the cavity feeding channel.

[0009] The upper shell male die and the lower shell male die are respectively provided with a label groove.

[0010] The female die assembly comprises a female die bottom plate, a female die fixed seat, a female die body and a second columnar die, the female die fixed seat is installed on the female die bottom plate, the female die body is installed on the female die fixed seat, the second columnar die is installed on the female die body, the second columnar die, the female die body and the upper shell male die form the upper shell cavities in cooperation, and the gate sleeve is arranged on the female die base and communicated with the split flow channel through the female die body.

[0011] The female die assembly is provided with a limiting groove, the male die assembly is provided with a limiting protrusion, the fitting surfaces between the limiting groove and the limiting protrusion are all inclined surfaces, and the fitting surfaces between the limiting groove and the limiting protrusion are contacted to form the clamping limiting of the female die assembly and the male die assembly.

[0012] The utility model discloses the beneficial effect is:

[0013] 1, the utility model discloses the upper end surface of first ejector pin forms the end surface of lower cylinder, sets up the through -hole on first ejector pin, and first columnar die is stretched out upward for forming the blind hole of lower cylinder with the through -hole on first ejector pin, and when opening the mould, first ejector pin is ejected to the end surface of lower cylinder, makes the lower shell of forming and male die assembly separate, and successfully completes demolding, and the layout of first ejector pin and first columnar die on the mould is reasonable, guarantees the formation of the blind hole on lower cylinder, and can effectively avoid the phenomenon that lower shell part can not smoothly demould in the ejection process of lower shell;

[0014] 2, the cavity comprises upper shell cavity and lower shell cavity, realizes one mould two piece production, and the material and pouring parameter of pouring of upper shell and lower shell are consistent when injection molding, therefore can make the appearance of upper shell and lower shell keep consistent, help to improve the appearance quality of product.

[0015] 3. The upper shell mold cavity and the lower shell mold cavity are arranged in pairs on both sides of the flow channel, and the upper shell mold cavity and the lower shell mold cavity on the same side of the flow channel are interspersed to balance the pressure of the mold cavities on both sides of the flow channel, ensuring that the molten material can fill the mold cavity evenly and further improve the product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly of the punch assembly and the ejector assembly;

[0017] Figure 2 This is a schematic diagram of the die assembly.

[0018] Figure 3 This is a schematic diagram of the structure of the present invention in the mold-closed state;

[0019] Figure 4 for Figure 3 Sectional view along line AA;

[0020] Figure 5 for Figure 3 Sectional view along the BB direction;

[0021] Figure 6 for Figure 5 A magnified schematic diagram of part C in the middle;

[0022] Figure 7 This is a schematic diagram of the lower shell structure;

[0023] Figure 8 This is a schematic diagram of the upper shell structure;

[0024] In the attached diagram, 1 is the flow channel, 2 is the sprue sleeve, 3 is the lower shell cavity, 4 is the punch base plate, 5 is the punch fixing seat, 6 is the lower shell punch, 7 is the first column mold, 8 is the ejector fixing plate, 9 is the first ejector pin, 10 is the upper shell cavity, 11 is the upper shell punch, 12 is the submarine gate, 13 is the second ejector pin, 1301 is the stepped end, 14 is the mold cavity feed channel, 15 is the die base plate, 16 is the die fixing seat, 17 is the die body, 18 is the second column mold, 19 is the limiting groove, 20 is the limiting protrusion, 21 is the lower shell, 2101 is the lower cylinder, and 22 is the upper shell. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] Specific implementation examples Figures 1-6The utility model relates to a kind of mutual inductor mould for square plastic box of Rogowski coil, including the recess die assembly for forming mould cavity, male die assembly and ejection assembly, male die assembly is provided with the shunt passage 1 being communicated with mould cavity, recess die assembly is provided with the sprue bushing 2 being communicated with shunt passage 1, the key is, mould cavity includes a group of lower shell mould cavity 3, male die assembly includes male die bottom plate 4, male die fixed base 5, lower shell male die 6 and first column type mould 7, male die fixed base 5 is solidly connected with male die bottom plate 4, lower shell male die 6 is installed on male die fixed base 5, first column type mould 7 is installed on male die bottom plate 4, ejection assembly includes ejection fixed plate 8 and first ejector rod 9, first ejector rod 9 is installed on ejection fixed plate 8 and is matched with lower shell male die 6, first ejector rod 9 is provided with through-hole, first column type mould 7 is set by means of through-hole and first ejector rod 9, first ejector rod 9 is used to form the end surface of lower cylinder 2101, first column type mould 7 is used to form the blind hole of lower cylinder 2101, lower shell male die 6, first column type mould 7, first ejector rod 9 and recess die assembly are matched to form lower shell mould cavity 3.

[0027] The position of lower cylinder 2101 on lower shell 21 is large in demoulding resistance, the wall thickness of the sidewall of lower shell 21 is thin, and lower cylinder 2101 is arranged adjacent to the sidewall of lower shell 21, so it is not easy to arrange an ejector rod at the sidewall of lower shell 21, if no ejector rod is arranged at lower cylinder 2101 or around lower cylinder 2101, lower shell 21 is easily deformed, the utility model forms the end surface of lower cylinder 2101 by means of the upper end surface of first ejector rod 9, the through-hole is arranged on first ejector rod 9, first column type mould 7 is arranged on male die bottom plate 4, first column type mould 7 is upwardly extended from the through-hole on first ejector rod 9 to form the blind hole of lower cylinder 2101, when the mould is opened, the end surface of lower cylinder 2101 is ejected by first ejector rod 9, so that the formed lower shell 21 is separated from male die assembly, and the demoulding is smoothly completed, the layout of first ejector rod 9 and first column type mould 7 on the mould is reasonable, which not only ensures the formation of the blind hole on lower cylinder 2101, but also effectively avoids the phenomenon that lower cylinder 2101 part of lower shell 21 cannot be smoothly demoulded in the ejection process.

[0028] Further, the mould cavity further includes a group of upper shell mould cavities 10, and the male die assembly further includes an upper shell male die 11, the upper shell male die 11 is matched with the recess die assembly to form the upper shell mould cavities 10, so that one mould is used to produce two parts, and the materials and pouring parameters for pouring the upper shell 22 and the lower shell 21 are consistent when injection molding, thus the appearance of the upper shell 22 and the lower shell 21 can be kept consistent, which helps to improve the appearance quality of the product obtained after the upper shell 22 and the lower shell 21 are buckled.

[0029] Preferably, the flow channel 1 is connected to the upper shell cavity 10 and the lower shell cavity 3 via a submarine gate 12. The design of the submarine gate 12 helps to reduce the flow resistance of the molten material in the mold, allowing the molten material to flow more smoothly into all corners of each cavity, thereby reducing resistance and pressure loss during injection molding, improving injection molding efficiency, and reducing energy consumption and production costs. In addition, the outlet of the submarine gate 12 is located in a concealed place in the part, improving the surface quality of the part.

[0030] The ejection assembly also includes a second ejector rod 13 mounted on the ejection fixing plate 8. The upper end of the second ejector rod 13 is a stepped end 1301. The upper shell punch 11 and the lower shell punch 6 are respectively provided with mounting holes for the second ejector rod 13. The stepped end 1301 and the mounting holes form a mold cavity feed channel 14. The outlet of the submarine gate 12 is connected to the mold cavity feed channel 14. The upper end of the second ejector rod 13 is in contact with the inner wall of the upper shell 22 and the lower shell 21. 14 is vertically arranged. The outlet of the mold cavity feed channel 14 is located inside the upper shell 22 and the lower shell 21, which has no impact on the appearance of the upper shell 22 and the lower shell 21. When the mold is opened, the second ejector pin 13 pushes upward relative to the punch assembly. The stepped end 1301 also ejects the solidified material in the mold cavity feed channel 14. The stepped end 1301 pushes the solidified material in the submarine gate 12 to separate the solidified material here from the solidified material in the diversion channel 1, so as to achieve smooth demolding.

[0031] The ejection assembly also includes a set of third ejector rods, which act on the inner walls of the upper shell 22 and the lower shell 21 respectively.

[0032] Preferably, the upper shell punch 11 and the lower shell punch 6 are respectively provided with marking grooves, and different markings are formed on the upper shell 22 and the lower shell 21 to distinguish the upper shell 22 and the lower shell 21, so as to facilitate the quick matching and installation of the manufactured upper shell 22 and the lower shell 21.

[0033] Furthermore, the die assembly includes a die base plate 15, a die fixing seat 16, a die body 17, and a second column mold 18. The die fixing seat 16 is mounted on the die base plate 15, the die body 17 is mounted on the die fixing seat 16, and the second column mold 18 is mounted on the die body 17. The second column mold 18, the die body 17, and the upper shell punch 11 are matched to form the upper shell mold cavity 10. The second column mold 18 and the die body 17 are set as a split structure, which facilitates the processing of the second column mold 18 and the die body 17. At the same time, it is not necessary to use the same material for the die body 17 and the second column mold 18. Only the material of the slender second column mold 18 needs to be strengthened, which helps to control the manufacturing cost of the mold. The sprue sleeve 2 is set on the die base and communicates with the flow channel 1 through the die body 17.

[0034] Further, the recessed die assembly is provided with a limiting slot 19, the male die assembly is provided with a limiting protrusion 20, the matching surfaces between the limiting slot 19 and the limiting protrusion 20 are all inclined surfaces, the matching surfaces between the limiting slot 19 and the limiting protrusion 20 are in contact to form the clamping limiting of the recessed die assembly and the male die assembly, in the embodiment, the limiting slot 19 is arranged on the recessed die body 17, the male die assembly further comprises a male die body, the male die body is installed on the male die fixing base 5, the upper shell male die 11 and the lower shell male die 6 pass through the male die body and protrude upward respectively, which is convenient for the processing of the male die body, the upper shell male die 11 and the lower shell male die 6, the limiting protrusion 20 is arranged on the male die body. The included angle between the matching surfaces of the limiting slot 19 and the limiting protrusion 20 and the Z axis is 5°, when the clamping is in place, the matching surfaces of the limiting slot 19 and the limiting protrusion 20 are in close contact with each other, which prevents the mold from being damaged due to excessive clamping.

Claims

1. A mold for a plastic box-shaped mutual inductor with a Rogowski coil, comprising a female mold assembly for forming a mold cavity, a male mold assembly, and an ejection assembly, wherein the male mold assembly is provided with a shunt channel (1) communicating with the mold cavity, and the female mold assembly is provided with a sprue bushing (2) communicating with the shunt channel (1), characterized in that: The mold cavity comprises a group of lower shell mold cavities (3), the punch assembly comprises a punch bottom plate (4), a punch fixed seat (5), a lower shell punch (6) and a first columnar mold (7), the punch fixed seat (5) is fixedly connected with the punch bottom plate (4), the lower shell punch (6) is installed on the punch fixed seat (5), and the first columnar mold (7) is installed on the punch bottom plate (4). ​ 2. A mould for a plastic Rogowski coil square box transformer according to claim 1, characterized in that: The mold cavity further comprises a group of upper shell mold cavities (10), and the punch assembly further comprises an upper shell punch (11); the upper shell punch (11) is matched with the die assembly to form the upper shell mold cavity (10); the upper shell mold cavities (10) and the lower shell mold cavities (3) are arranged in pairs on the two sides of the shunt channel (1), and the upper shell mold cavities (10) and the lower shell mold cavities (3) on the same side of the shunt channel (1) are arranged in a staggered mode.

3. A mould for a plastic Rogowski coil square box transformer according to claim 2, characterized in that: The shunt channel (1) is communicated with the upper shell mold cavities (10) and the lower shell mold cavities (3) through the latent gate (12).

4. A mould for a plastic Rogowski coil square box transformer according to claim 3, characterized in that: The ejection assembly further comprises a second ejector rod (13) installed on the ejection fixed plate (8), the upper end of the second ejector rod (13) is a stepped end (1301), the upper shell punch (11) and the lower shell punch (6) are respectively provided with mounting holes of the second ejector rod (13), the stepped end (1301) and the mounting holes form a mold cavity feeding channel (14), and the discharge port of the latent gate (12) is communicated with the mold cavity feeding channel (14).

5. A mould for a plastic Rogowski coil square box transformer according to claim 2, characterized in that: The upper shell punch (11) and the lower shell punch (6) are respectively provided with a label groove.

6. A Rogowski coil square plastic box mutual inductor mold according to claim 2, characterized in that: The die assembly comprises a die bottom plate (15), a die fixed seat (16), a die body (17) and a second columnar mold (18), the die fixed seat (16) is installed on the die bottom plate (15), the die body (17) is installed on the die fixed seat (16), and the second columnar mold (18) is installed on the die body (17); the second columnar mold (18), the die body (17) and the upper shell punch (11) are matched to form the upper shell mold cavity (10); and the gate sleeve (2) is arranged on the die base and communicated with the shunt channel (1) through the die body (17).

7. A mould for a plastic Rogowski coil square box transformer according to claim 1, characterized in that: The recessed die assembly is provided with a limiting slot (19), the male die assembly is provided with a limiting convex (20), the matching surfaces between the limiting slot (19) and the limiting convex (20) are all inclined surfaces, and the matching surfaces between the limiting slot (19) and the limiting convex (20) are contacted to form the die limiting of the die assembly and the male die assembly.

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