Leakage protection plug injection mold

Abstract

The utility model discloses an electric leakage protection plug injection mold which comprises an upper mold, a lower mold and a lower mold, the lower die is arranged below the upper die, die cores matched with the die cavities are arranged in the middle of the lower die at equal intervals, a mounting plate is arranged at the bottom of the lower die, and limiting hooks and limiting insertion plates which are matched with the mounting plate and interlocked are arranged at the bottoms of the die cores; the mold core has the beneficial effects that by unlocking the limiting insertion plate and extruding the screw, when the shape of the mold core needs to be changed, the operation is relatively simple, and only relevant parts need to be disassembled and reinstalled; and through the limiting hook and the limiting insertion plate, it is ensured that the mold core is correctly positioned in the mounting plate, the positioned mold core can be tensioned and fixed through extrusion and tensioning of the screw, and rapid fixing is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of processing leakage protection plugs, in particular to an injection mold for leakage protection plugs. Background Art

[0002] The electric protection plug is an electrical device used for safe use of electricity, mainly used to prevent electric shock accidents caused by current leakage. It detects whether there is leakage in the circuit by monitoring the difference in current. Once leakage is detected, the circuit is immediately cut off to protect the safety of the user. The leakage protection plug can monitor the difference in current. Once it detects that the current exceeds the set threshold or there is abnormal current leakage in the current loop, it will quickly cut off the power supply to prevent the danger caused by leakage.

[0003] When the leakage protection plug is produced, its shell is mass-produced through an injection mold. The existing leakage protection plug injection mold has multiple mold cores that are injected and molded at the same time. Since the leakage protection plug has various and different appearances and shapes, the mold core needs to be replaced when different types of shells are injected. When replacing, multiple fastening bolts need to be disassembled and assembled. The operation is relatively cumbersome and cannot be quickly replaced and disassembled. Utility Model Content

[0004] The utility model aims to provide an injection mold for a leakage protection plug to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an injection mold for a leakage protection plug, comprising:

[0006] The upper mold is a metal block with a mold cavity at the bottom;

[0007] A lower mold, which is placed below the upper mold, a mold core that matches the mold cavity is equidistantly arranged in the middle of the lower mold, a mounting plate is arranged at the bottom of the lower mold, and a limiting hook and a limiting plug plate that are interlocked with the mounting plate are arranged at the bottom of the mold core;

[0008] The support is placed at the bottom of the lower mold, and the support includes a lifting plate that is slidably arranged up and down. A reset spring and an ejector are provided on the top of the lifting plate. A support plate is slidably connected to the outer side of the ejector to limit the reset spring and the ejector when the mold core is replaced.

[0009] Preferably, a wavy cooling water pipe is provided in the middle of the upper die and the lower die.

[0010] Preferably, the limit hooks are arranged in groups of two, and a limit slot is provided on one side corresponding to each group of the limit hooks, and the limit plug plate is plugged into the inside of the limit slot.

[0011] Preferably, a positioning slot is provided in the middle of the mounting plate at a position corresponding to the limiting hook, and a squeezing screw is threadedly connected to the middle of the limiting plug plate, and one end of the squeezing screw is connected to the mounting plate.

[0012] Preferably, the support further comprises a base, the top of the base is symmetrically fixed with two side plates, the lifting plate is slidably placed between the two side plates, and the ejector pin is fixed to the top of the lifting plate and is slidably connected to the mold core.

[0013] Preferably, a lifting groove is provided in the middle of each of the side plates, a lifting slider is slidably connected to the middle of the lifting groove, and the lifting slider is fixedly connected to the support plate.

[0014] Preferably, a support column is fixedly connected to the top of the base, the support plate and the lifting plate are both slidably connected to the support column, and a return spring is sleeved on the outer side of the support column and located between the support plate and the lifting plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are: by unlocking the limit plug plate and the extrusion screw, when the shape of the mold core needs to be changed, the operation is relatively simple, and it only needs to disassemble and reinstall the relevant parts; the support includes lifting plates, ejectors, support plates and other parts, so that when the mold core is replaced, the entire base can be fixed conveniently by locking the support plate, avoiding scattered or large-scale disassembly and assembly of workpieces during disassembly, and the correct positioning of the mold core inside the mounting plate is ensured by the limit hook and the limit plug plate, and the positioned mold core can be tightened and fixed by squeezing and tightening the screws to achieve quick fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a structural schematic diagram of the lifting slider of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the mounting plate of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the limit slot of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the mold core of the utility model.

[0021] In the figure: 1. Base; 2. Side panel; 3. Lower mold; 4. Lifting plate; 5. Reset spring; 6. Mold core; 7. Support column; 8. Ejector pin; 9. Upper mold; 10. Mounting plate; 11. Support plate; 12. Limit hook; 13. Limit slot; 14. Limit plug-in plate; 15. Extrusion screw; 16. Cooling water pipe; 17. Lifting slider; 18. Lifting slot; 19. Positioning slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 , 2 As shown in Figures 3, 4 and 5, the utility model provides a technical solution: an injection mold for a leakage protection plug, comprising: an upper mold 9, which is a metal block with a mold cavity at the bottom; a lower mold 3 is placed below the upper mold 9, and a mold core 6 matching the mold cavity is equidistantly and detachably installed in the middle of the lower mold 3, and a mounting plate 10 is provided at the bottom of the lower mold 3, and a limiting hook 12 and a limiting plug plate 14 that are interlocked with the mounting plate 10 are provided at the bottom of the mold core 6; a support is placed at the bottom of the lower mold 3, and the support comprises a lifting plate 4 that is slidably arranged up and down, and a reset spring 5 and an ejector pin 8 are provided on the top of the lifting plate 4, and a support plate 11 is slidably connected to the outer side of the ejector pin 8, which is used to limit the reset spring 5 and the ejector pin 8 when the mold core 6 is replaced.

[0024] It should be noted that, in the present invention, guide rods are fixed to the four corners of the top of the lower mold 3, and holes that match the guide rods are provided at the bottom of the upper mold 9. The guide rods are inserted into the holes of the upper mold 9 to achieve the mold closing of the upper mold 9 and the lower mold 3. Then, the top of the upper mold 9 is connected to the injection molding machine through the injection molding port, and the injection molding is completed by the injection molding machine. After the injection molding is completed, the plug shell is formed by cooling, the upper mold 9 is separated from the lower mold 3, and then the lifting plate 4 drives the ejector pin 8 to move. The ejector pin 8 ejects the molded shell outside the mold core 6 to achieve demolding. When the appearance of the mold core 6 needs to be replaced, the support plate After 11 slides downward, it is fixed with bolts, and then the fastening screws connecting the support and the lower mold 3 are removed, and then the limiting plug plate 14 is pulled out from one end of the limiting hook 12, and then the core 6 is removed from the top of the mounting plate 10, and the core 6 of the new plug is reinserted into the top of the mounting plate 10, and the limiting plug plate 14 cooperates with the limiting hook 12 to complete the connection between the core 6 and the mounting plate 10, and the core 6 is passed through the bottom of the lower mold 3, and then the lower mold 3, the mounting plate 10 and the base 1 are fixed from top to bottom with screws, and then the restraint of the support plate 11 is opened to complete the replacement of the core 6.

[0025] See also Figure 1 As shown, a wavy cooling water pipe 16 is provided in the middle of the upper mold 9 and the lower mold 3 .

[0026] It should be noted that the cooling water pipe of the utility model can cool the mold surface when necessary to prevent the plastic material from softening or deforming due to overheating. Rapidly lowering the mold temperature can speed up the curing time of the plastic, thereby increasing production efficiency.

[0027] See also Figure 3 , 4 As shown, the limit hooks 12 are arranged in groups of two, and a limit slot 13 is provided on the corresponding side of each group of limit hooks 12. The limit plug plate 14 is inserted into the inside of the limit slot 13. A positioning slot hole 19 is provided in the middle of the mounting plate 10 corresponding to the position of the limit hooks 12. The middle part of the limit plug plate 14 is threadedly connected with an extrusion screw 15, and one end of the extrusion screw 15 is connected to the mounting plate 10.

[0028] It should be noted that, when the utility model disassembles the mold core 6 and the mounting plate 10, the extrusion screw 15 is loosened so that the end of the extrusion screw 15 does not contact the mounting plate 10, and then the limiting plug plate 14 is pulled out from the inside of the limiting slot 13, and then the mold core 6 is removed from the top of the mounting plate 10. When replacing, the limiting hook 12 at the bottom of the mold core 6 is inserted into the corresponding positioning slot 19. At this time, the limiting slot 13 is located below the mounting plate 10, and then the limiting plug plate 14 is inserted into the limiting slot 13 from one end, and then the extrusion screw 15 is rotated so that the end of the extrusion screw 15 presses against the mounting plate 10, thereby pulling the limiting plug plate 14 through the mounting plate 10, so that the mold core 6 and the mounting plate 10 are fitted together.

[0029] See also Figure 1 , 2 As shown, the support also includes a base 1, the top of the base 1 is symmetrically fixed with two side plates 2, the lifting plate 4 is slidably placed between the two side plates 2, the ejector pin 8 is fixed to the top of the lifting plate 4 and is slidably connected to the mold core 6, the middle of the side plate 2 is provided with a lifting groove 18, the middle of the lifting groove 18 is slidably connected with a lifting slider 17, the lifting slider 17 is fixed to the support plate 11, the top of the base 1 is fixedly connected with a support column 7, the support plate 11 and the lifting plate 4 are both slidably connected to the support column 7, and a return spring 5 is sleeved on the outside of the support column 7 and located between the support plate 11 and the lifting plate 4.

[0030] It should be noted that, in the utility model, the lifting slider 17 moves downward along the lifting groove 18, and the support plate 11 is driven to move downward by the lifting slider 17. The support plate 11 moves downward along the support column 7 to compress the reset spring 5, and the lifting slider 17 is fixed to one side of the side plate 2 by screws, so as to fix the bottom reset spring 5 and the mounting plate 10, and then the screws at the bottom of the side plate 2 are removed, and the lower mold 3 and the mounting plate 10 are removed. After the core mold 6 is replaced, the mounting plate 10 and the core mold 6 are stacked on the top of the side plate 2 in sequence, and then the screws are installed from the side plate 2 upward.

[0031] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0033] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leakage protection plug injection mold, characterized in that: include: An upper mold (9), which is a metal block with a mold cavity at the bottom; A lower mold (3), the lower mold (3) is placed below the upper mold (9), a mold core (6) matching the mold cavity is equidistantly arranged in the middle of the lower mold (3), a mounting plate (10) is arranged at the bottom of the lower mold (3), and a limiting hook (12) and a limiting plug plate (14) interlocked with the mounting plate (10) are arranged at the bottom of the mold core (6); A support is arranged at the bottom of the lower mold (3), and the support comprises a lifting plate (4) which is slidably arranged up and down, a return spring (5) and an ejector pin (8) are arranged on the top of the lifting plate (4), and a support plate (11) is slidably connected to the outer side of the ejector pin (8) for limiting the return spring (5) and the ejector pin (8) when the mold core (6) is replaced.

2. The injection mold for leakage protection plug according to claim 1, characterized in that: The middle parts of the upper mold (9) and the lower mold (3) are both provided with wave-shaped cooling water pipes (16).

3. The injection mold for leakage protection plug according to claim 1, characterized in that: The limiting hooks (12) are arranged in groups of two, and a limiting slot (13) is provided on one side corresponding to each group of the limiting hooks (12), and the limiting plug plate (14) is plugged into the inside of the limiting slot (13).

4. The injection mold for leakage protection plug according to claim 3, characterized in that: A positioning slot (19) is provided in the middle of the mounting plate (10) at a position corresponding to the limiting hook (12), and a pressing screw (15) is threadedly connected to the middle of the limiting plug plate (14), and one end of the pressing screw (15) is connected to the mounting plate (10).

5. The injection mold for leakage protection plug according to claim 1, characterized in that: The support further comprises a base (1), the top of the base (1) being symmetrically fixed with two side plates (2), the lifting plate (4) being slidably disposed between the two side plates (2), and the ejector pin (8) being fixedly connected to the top of the lifting plate (4) and being slidably connected with the mold core (6).

6. The injection mold for leakage protection plug according to claim 5, characterized in that: A lifting groove (18) is provided in the middle of each side plate (2), a lifting slider (17) is slidably connected to the middle of the lifting groove (18), and the lifting slider (17) is fixedly connected to the support plate (11).

7. The injection mold for leakage protection plug according to claim 6, characterized in that: A support column (7) is fixedly connected to the top of the base (1); the support plate (11) and the lifting plate (4) are both slidably connected to the support column (7); and a return spring (5) is sleeved on the outside of the support column (7) and located between the support plate (11) and the lifting plate (4).

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