Injection mold of electric meter box

Abstract

The invention discloses an injection mold for an electric meter box. The injection mold comprises an upper mold, a lower mold, a mold core, a first insert, a second insert and a first tool, the lower die and the upper die are oppositely arranged, and the lower die is provided with a groove; the mold core is arranged in the groove of the lower mold, the mold core is provided with a first mounting groove, and a cavity for injection molding is formed when the upper mold, the lower mold and the mold core are closed; the first insert is detachably arranged at the bottom of the upper die; the second insert is detachably arranged at the top of the mold core; the first tool is arranged in the first mounting groove, a plurality of machining grooves are formed in the top of the first tool, and the machining grooves are formed in the width direction of the lower die at intervals; during mold closing, a cavity for injection molding is formed among the upper mold, the lower mold, the mold core, the first insert, the second insert and the first tool, and a plastic part for injection molding is arranged in the cavity. Compared with the prior art, various types of electric meter boxes can be produced, and the mold structure is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold for an electric meter box. Background Art

[0002] Electricity meter boxes are common equipment in residential power grids. Housed within them are energy meters and other supporting electrical components. These meters measure energy consumption and are essential for calculating electricity bills and monitoring power consumption. Data collection from power meters relies on manual reading, which is inconvenient, labor-intensive, slow, and prone to errors, resulting in inaccurate data. With the development of power systems, meter boxes are often equipped with infrared communication ports, which are used in conjunction with data collectors to collect meter data. To prevent dust from entering the box through the infrared port, existing meter boxes often feature a cover, similar to the aforementioned meter box. This ensures that dust cannot enter the box through the infrared port when the meter is not collecting data. Therefore, there is a need for a meter box with an infrared slot to facilitate data collection.

[0003] Injection molding is a common method for producing plastic products in current industrial production, and is also a common method for making the shells of electric meter boxes. First, a corresponding injection mold is machined according to the shape of the electric meter box. The heated molten plastic is injected into the mold cavity. A cooling system cools and solidifies the plastic melt to form the corresponding injection molded product. The mold is then opened and the product is removed. Injection molded products are highly precise and can meet the diverse needs of various industries. A set of injection molds can be reused multiple times, resulting in low production costs and widespread acceptance among companies. For automotive parts processing companies, driven by the trend toward lightweight and low-cost vehicles, many parts originally made of metal are now made of plastic, processed into defined shapes using injection molds.

[0004] However, the existing injection mold cannot produce an electric meter box directly having an infrared slot, so the existing injection mold needs to be improved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an injection mold capable of producing various types of electric meter boxes in view of the above technical status quo, and to simplify the mold structure.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: an injection mold for an electric meter box, characterized in that it includes:

[0007] upper mold;

[0008] A lower mold is arranged opposite to the upper mold, and the lower mold has a groove;

[0009] A mold core is arranged in the groove of the lower mold, and the mold core has a first mounting groove. When the upper mold, the lower mold and the mold core are combined, a cavity for injection molding is formed;

[0010] A first insert is detachably mounted on the bottom of the upper mold;

[0011] The second insert is detachably mounted on the top of the mold core;

[0012] A first tooling is provided in the first installation groove, wherein a plurality of processing grooves are provided on the top of the first tooling, and the plurality of processing grooves are arranged at intervals along the width direction of the lower mold;

[0013] When the mold is closed, a cavity for injection molding is formed between the upper mold, the lower mold, the mold core, the first insert, the second insert and the first tooling, and the plastic part to be injection-molded is arranged in the cavity;

[0014] The plastic part includes a detection groove for placing a collector and a circuit breaker groove for installing a circuit breaker; the first insert and the second insert cooperate to injection mold the detection groove, and the upper mold cooperates with the first tooling to injection mold the circuit breaker groove.

[0015] In order to facilitate the removal of the injection molded parts according to the use requirements, preferably, the processing groove extends along the length direction of the lower mold, and each processing groove includes:

[0016] The first processing section extends along the length direction of the lower die;

[0017] There are two second processing sections, which are respectively arranged at both ends of the first processing section, and the groove width of the second processing section is smaller than the groove width of the first processing section;

[0018] The groove depth of each second processing section gradually decreases from the inside out. Because the groove depth of each second processing section decreases from the inside out, the corresponding injection-molded plate is thinner at the corresponding section, making it easier to knock out. Depending on the installation location of the energy meter, workers can omit the plate in that location during production. Alternatively, when installing a circuit breaker in the meter box, they can use tools to knock out the plate corresponding to the circuit breaker location. Therefore, this box cover structure can accommodate more meter boxes and has a wider range of applications.

[0019] In order to facilitate the production of plastic parts of different specifications according to the required meter box, preferably, the injection mold also includes

[0020] The second tool is detachably arranged in the processing groove to cover the processing groove, and the top of the second tool is flush with the top of the first tool.

[0021] In order to connect the injection molding machine and balance the force of the injection mold, preferably, the injection mold also includes

[0022] An upper fixed plate is provided on the top of the upper mold; a sprue bushing is provided in the upper fixed plate;

[0023] A lower fixed plate is provided at the bottom of the lower die;

[0024] The feeding pipe is connected with the gate sleeve.

[0025] In order to make the injection molding more stable and improve the injection molding quality and demoulding effect, preferably, the injection mold further includes:

[0026] A stripping plate is provided between the upper fixed plate and the upper die;

[0027] There are two spacer plates and they are arranged between the lower fixed plate and the lower mold;

[0028] Ejector pin assembly, used to eject plastic parts.

[0029] In order to demould after the injection molding is completed, preferably, the ejector pin assembly includes

[0030] A first ejector plate is provided between the two spacer plates;

[0031] a second ejector plate, disposed on top of the first ejector plate and between the two spacer plates;

[0032] The third ejector plate is arranged on the stripping plate; the first ejector plate and the second ejector plate move up to eject the plastic part; the third ejector plate moves down to eject the plastic part.

[0033] In order to facilitate the displacement of the ejector assembly, preferably, the injection mold further includes a driving assembly for driving the ejector assembly to move;

[0034] The drive assembly includes:

[0035] a first driving member, disposed between the first ejector plate and the lower fixing plate;

[0036] The second driving member is arranged between the third ejector plate and the stripping plate.

[0037] In order to provide power to the hot runner and ejector plate of the injection mold, preferably, the injection mold further comprises:

[0038] A control socket is provided on the side of the upper fixing plate, and is used to electrically connect to an external power source to provide power to the injection mold;

[0039] The top of the upper fixing plate is provided with a receiving groove for receiving a control line electrically connected to the control socket.

[0040] In order to facilitate injection molding, preferably,

[0041] The injection mold further comprises:

[0042] A positioning ring, provided on the top of the upper fixing plate;

[0043] The sprue bushing is located at the bottom of the positioning ring.

[0044] Preferably, the mold core also has a second mounting groove, and the second insert is arranged in the second mounting groove; the bottom end of the first insert and the top end of the second insert are both cylindrical, and the cross-sectional diameter of the top end of the second insert is larger than the cross-sectional diameter of the bottom end of the first insert.

[0045] Compared with the prior art, the advantages of the present invention are: the first insert is detachably arranged at the bottom of the upper mold, and the second insert is detachably arranged at the top of the mold core. The cooperation between the first insert and the second insert can enable the obtained plastic part to have a detection groove. The electric meter box using the plastic part can be used to place a collector, so as to collect and detect data of the electric energy meter installed in the plastic part; a plurality of processing grooves are provided on the top of the first tooling, which is convenient for processing to form a circuit breaker groove. After the electric meter is installed, the top of the circuit breaker is arranged in the circuit breaker groove; the detachable first insert and the second insert can facilitate the production of plastic parts of different specifications without increasing the parting surface of the entire mold; there is only one mold core to simplify the structure of the entire injection mold, reduce the volume of the entire injection mold, facilitate production and processing, and reduce injection molding errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of an embodiment;

[0047] Figure 2 A partially exploded view of an embodiment;

[0048] Figure 3 is a cross-sectional view of an embodiment;

[0049] Figure 4 for Figure 3 A magnified view of point A;

[0050] Figure 5 for Figure 3 An enlarged view of point B;

[0051] Figure 6 is a schematic structural diagram of the third ejector plate of the embodiment;

[0052] Figure 7 Schematic diagram of the structure of the first tooling of the embodiment. DETAILED DESCRIPTION

[0053] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0054] like Figure 1-7The figure shows a preferred embodiment of the present invention. The injection mold for an electric meter box includes an upper mold 1, a lower mold 2, a mold core 3, a first insert 4, a second insert 5, an upper fixing plate 8, a lower fixing plate 9, a feed tube 10, a stripper plate 11, a spacer 12, an ejector assembly, a drive assembly, and a control socket 16. When the injection mold is closed, a cavity for injection molding is formed between the upper mold 1, lower mold 2, mold core 3, first insert 4, second insert 5, and first tooling 6. Within this cavity is a plastic part 7 to be injection-molded. In this embodiment, plastic part 7 is an electric meter box door. In other embodiments, the shapes of the mold core 3 and upper mold 1 can be modified to produce plastic parts 7 of other shapes, such as an electric meter box body. Plastic part 7 includes a collection slot 71 for accommodating a collector and a circuit breaker slot 72 for mounting a circuit breaker. Correspondingly, a cavity for forming the collection slot 71 is formed between the first insert 4 and the second insert 5, and a cavity for forming the circuit breaker slot is formed between the upper mold 1 and the first tooling 6.

[0055] The lower mold 2 is arranged opposite to the upper mold 1, and the lower mold 2 has a groove 21. The sides of the upper mold 1 and the lower mold 2 are both provided with handles 21. In addition, a second connecting member 22 is provided between the upper mold 1 and the lower mold 2, so that the upper mold 1 and the lower mold 2 fit together after the mold is closed. The second connecting member 22 is an integral part, or a block group composed of multiple blocks. The injection mold also has a third connecting member 23, one end of the third connecting member 23 is provided on the side of the upper mold 1, and the other end is provided on the side of the lower mold 2. The third connecting member 23 is installed after the mold is closed, so that the upper mold 1 and the lower mold 2 will not separate from each other during the injection molding process. The upper mold 1 and the lower mold 2 are provided with multiple cooling water channels, and the sides of the upper mold 1 and the lower mold 2 have water inlets and outlets for the cooling water channels.

[0056] The mold core 3 is positioned within the groove 21 of the lower mold 2. The mold core 3 has a first mounting groove 31, which forms a cavity for injection molding when the upper mold 1, lower mold 2, and mold core 3 are combined. A first insert 4 is removably mounted on the bottom of the upper mold 1; a second insert 5 is removably mounted on the top of the mold core 3. The bottom of the first insert 4 and the top of the second insert 5 are both cylindrical, with the cross-sectional diameter of the top of the second insert 5 being larger than that of the bottom of the first insert 4. The combination of the first insert 4 and the second insert 5 results in an infrared groove in the finished plastic part 7, which can be used to house a data collector to collect data from the electric energy meter installed in the plastic part 7. The mold core 3 also has a second mounting groove 32, within which the second insert 5 is mounted.

[0057] The first tooling 6 is arranged in the first installation groove 31. A plurality of processing grooves 61 are provided on the top of the first tooling 6. The plurality of processing grooves 61 are arranged at intervals along the width direction of the lower mold 2.

[0058] The processing groove 61 extends along the length of the lower mold 2, and each processing groove 61 includes a first processing section 611 and a second processing section 612. The first processing section 611 extends along the length of the lower mold 2; there are two second processing sections 612, one at each end of the first processing section 611, and the groove width of the second processing section 612 is smaller than the groove width of the first processing section 611; the groove depth of each second processing section 612 gradually decreases from the inside to the outside. Therefore, the processed plastic part 7 can form a knockout piece that can be knocked out. When installing a circuit breaker in an electric meter box using this plastic part 7, a tool is used to knock out the knockout piece corresponding to the position of the circuit breaker. Therefore, the box cover of this structure can adapt to more electric meter boxes and has a wider range of applications. The second tooling 62 is detachably arranged in the processing groove 61 to cover the processing groove 61, and the top of the second tooling 62 is flush with the top of the first tooling 6.

[0059] An upper fixing plate 8 is mounted on top of the upper mold 1; a sprue bushing 81 is incorporated into the upper fixing plate 8. A lower fixing plate 9 is mounted on the bottom of the lower mold 2. The upper and lower fixing plates 8, 9, provide rigid support, precise positioning, and force transmission, ensuring stable operation of the injection mold during high-pressure, high-speed injection molding. The top of the upper fixing plate 8 features a receiving slot 1a for accommodating control wires electrically connected to the control socket 16. The top of the upper fixing plate 8 also features multiple stoppers 82, positioned within the notches of the receiving slot 1a to facilitate the storage of the control wires.

[0060] The feed pipe 10 is connected to the gate sleeve 81, forming a channel for the high-temperature molten plastic liquid to enter the cavity for injection molding. Figure 4 As shown, the feed tube 10 and sprue bushing 81 are integrated. This single piece avoids steps or misalignment that can occur with separate components, allowing for a smoother melt flow path, reducing shear heating and pressure loss, and improving filling uniformity. The control line is located within the receiving groove 1a, facilitating heating of the plastic within the feed tube. Connecting bolts, sealing rings, and other accessories are eliminated, reducing assembly complexity and minimizing failures caused by loose or worn parts. In other embodiments, the feed tube 10 and sprue bushing 81 may be separate components.

[0061] The stripping plate 11 is arranged between the upper fixed plate 8 and the upper mold 1; the stripping plate 11 prevents the ejector pins from directly contacting the product appearance surface by applying force evenly, reduces ejection marks or scratches, helps demolding, and reduces the design complexity of the ejector pin assembly.

[0062] There are two spacer plates 12 and they are disposed between the lower fixing plate 9 and the lower mold 2 .

[0063] The control socket 16 is provided on the side of the upper fixing plate 8 , and the control socket 16 is used to be electrically connected to an external power source to provide electrical energy to the injection mold.

[0064] The ejector assembly is used to eject the plastic part 7 and realize demoulding. The ejector assembly includes a first ejector plate 13, a second ejector plate 14 and a third ejector plate 15. The first ejector plate 13 is arranged between the two spacer plates 12; the second ejector plate 14 is arranged on the top of the first ejector plate 13 and between the two spacer plates 12; the top of the second ejector plate 14 is provided with an ejector pin 19; the third ejector plate 15 is arranged on the stripping plate 11, and the bottom of the third ejector plate 15 is also provided with an inclined ejector pin 153, and the ejector pin 19 extends in the vertical direction. Figure 5 As shown, a first connecting member 152 is provided between the third ejector plate 15 and the ejector pins 19 corresponding to the third ejector plate 15. The first connecting member 152 connects the ejector pins 19 to the third ejector plate 15 and acts as a buffer during mold ejection. The first ejector plate 13 and the second ejector plate 14 move upward to eject the plastic part 7; the third ejector plate 15 moves downward, driving the inclined ejector pins 153 to move and eject the plastic part 7. The top of the third ejector plate 15 has a third mounting slot 151. The second ejector plate 14 is provided with a plurality of guide posts 141 for limiting the displacement direction of the second ejector plate 14. The second ejector plate 14 moves along the guide posts 141 when it is displaced.

[0065] The injection mold further includes a drive assembly (not shown) for driving the displacement of the ejector assembly; the drive assembly includes a first drive member and a second drive member; the first drive member is disposed between the first ejector plate 13 and the lower fixed plate 9; the second drive member is disposed between the third ejector plate 15 and the stripping plate 11 and is located within the third mounting groove 151. In this embodiment, the first drive member and the second drive member are both springs; in other embodiments, the first drive member and the second drive member may also be engaging members that engage with the ejector assembly, and the engaging members may move under the action of a power source, thereby driving the displacement of the ejector assembly and achieving demolding; the power source may be an external power source that transmits electrical energy through the control socket 16, or may be a hydraulic cylinder, etc., disposed within the injection mold.

[0066] The positioning ring 17 is arranged on the top of the upper fixing plate 8 and is precisely aligned with the nozzle hole of the injection molding machine; the gate sleeve 81 is located at the bottom of the positioning ring 17, thereby facilitating injection molding.

[0067] The workflow of this embodiment is:

[0068] After the molds are closed, a cavity for injection molding is formed between the upper mold 1, lower mold 2, mold core 3, first insert 4, second insert 5, and first tooling 6. The external injection molding colloid is then injected into the cavity through the positioning ring 17, gate bushing 81, and feed pipe 10. After the injection of the injection molding colloid is completed, cooling water is injected from the water inlet and flows into the cooling water channel for heat exchange, which allows the plastic in the cavity to be quickly and evenly cooled, thereby quickly shaping the product and obtaining the desired injection-molded plastic part 7.

[0069] After injection molding is complete, the plastic part 7 needs to be demolded. Specifically, when the mold is opened, the external clamping force is removed. Under the action of the rebound force of the first driving member, the first ejector plate 13 and the lower fixed plate 9 are separated. The first ejector plate 13 drives the second ejector plate 14 to move. As the second ejector plate 14 moves upward, it drives the ejector pins 19 upward, separating the bottom of the plastic part 7 from the mold core 3. In addition, under the action of the rebound force of the second driving member, the third ejector plate 15 and the stripping plate 11 are separated. The third ejector plate 15 moves downward, driving the inclined ejector pins 153 to move, thereby separating the plastic part 7 from the upper mold 1, ejecting the plastic part 7, and completing the demolding of the injection molded product.

Claims

1. An injection mold for an electric meter box, characterized in that: include Upper mold(1); A lower die (2) is arranged opposite to the upper die (1), and the lower die (2) has a groove (21); A mold core (3) is arranged in the groove (21) of the lower mold (2), the mold core (3) having a first mounting groove (31), and a cavity for injection molding is formed when the upper mold (1), the lower mold (2) and the mold core (3) are combined; A first insert (4) is detachably arranged on the bottom of the upper mold (1); A second insert (5) is detachably mounted on the top of the mold core (3); A first tool (6) is arranged in the first installation groove (31), and a plurality of processing grooves (61) are provided on the top of the first tool (6), and the plurality of processing grooves (61) are arranged at intervals along the width direction of the lower mold (2); When the mold is closed, a cavity for injection molding is formed between the upper mold (1), the lower mold (2), the mold core (3), the first insert (4), the second insert (5) and the first tooling (6), and the injection-molded plastic part (7) is provided in the cavity; The plastic part (7) comprises a collecting groove (71) for accommodating a collector and a circuit breaker groove (72) for installing a circuit breaker; correspondingly, the first insert (4) and the second insert (5) cooperate to injection-mold the collecting groove (71), and the upper mold (1) and the first tooling (6) cooperate to injection-mold the circuit breaker groove (72).

2. The injection mold for the electric meter box according to claim 1, characterized in that: The processing grooves (61) extend along the length direction of the lower mold (2), and each processing groove (61) includes: A first processing section (611) extends along the length direction of the lower mold (2); Two second processing sections (612) are provided respectively at both ends of the first processing section (611); the groove width of the second processing section (612) is smaller than the groove width of the first processing section (611); The groove depth of each of the second processing sections (612) gradually decreases from the inside to the outside.

3. The injection mold for the electric meter box according to claim 2, characterized in that: The injection mold further comprises a second tool (62) which is detachably arranged in the processing groove (61) so as to cover the processing groove (61), and the top of the second tool (62) is flush with the top of the first tool (6).

4. The injection mold for the electric meter box according to claim 1, characterized in that: The injection mold further comprises an upper fixing plate (8) disposed on the top of the upper mold (1); a sprue sleeve (81) is disposed in the upper fixing plate (8); A lower fixed plate (9) is provided at the bottom of the lower mold (2); The feeding pipe (10) is communicated with the sprue sleeve (81).

5. The injection mold for the electric meter box according to claim 4, characterized in that: The injection mold further comprises: A stripping plate (11) is provided between the upper fixing plate (8) and the upper die (1); Two spacer plates (12) are provided between the lower fixed plate (9) and the lower mold (2); The ejector pin assembly is used to eject the plastic part (7).

6. The injection mold for the electric meter box according to claim 5, characterized in that: The ejector pin assembly includes A first ejector plate (13) is provided between the two spacer plates (12); A second ejector plate (14) is provided on top of the first ejector plate (13) and between the two spacer plates (12); The third ejector plate (15) is arranged on the stripping plate (11); the first ejector plate (13) and the second ejector plate (14) move upward to eject the plastic part (7); and the third ejector plate (15) moves downward to eject the plastic part (7).

7. The injection mold for the electric meter box according to claim 6, characterized in that: The injection mold further includes a driving assembly for driving the ejector assembly to move; The drive assembly includes: A first driving member is provided between the first ejector plate (13) and the lower fixing plate (9); The second driving member is arranged between the third ejector plate (15) and the stripping plate (11).

8. The injection mold for the electric meter box according to claim 4, characterized in that: The injection mold further comprises: A control socket (16) is provided on a side surface of the upper fixing plate (8), and the control socket (16) is used to be electrically connected to an external power source to provide electrical energy to the injection mold; The top of the upper fixing plate (8) is provided with a receiving groove (1a) for receiving a control wire electrically connected to the control socket (16).

9. The injection mold for the electric meter box according to claim 4, characterized in that: The injection mold further comprises: A positioning ring (17) is provided on the top of the upper fixing plate (8); The sprue sleeve (81) is located at the bottom of the positioning ring (17).

10. The injection mold for the electric meter box according to claim 1, characterized in that: The mold core (3) also has a second mounting groove (32), and the second insert (5) is arranged in the second mounting groove (32); the bottom end of the first insert (4) and the top end of the second insert (5) are both cylindrical, and the cross-sectional diameter of the top end of the second insert (5) is larger than the cross-sectional diameter of the bottom end of the first insert (4).

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