Die for pressure injection molding of rotating shaft of circuit breaker

Abstract

The utility model relates to the technical field of circuit breaker machining, in particular to a mold for pressure injection molding of a circuit breaker rotating shaft, which comprises a static mold and a movable mold, a first mold core is embedded on the static mold, a second mold core is embedded on the movable mold, and the first mold core and the second mold core are abutted to form a pressure injection cavity; a runner communicated with the pressure injection cavity is formed in the static mold; a positioning assembly is fixedly arranged on the side face of the movable mold and comprises a push plate arranged on the side face of the static mold in a sliding mode, a positioning rod fixedly arranged on one side of the push plate and a driving piece fixedly arranged on the side face of the movable mold, and the driving piece is used for driving the positioning rod to move in a reciprocating mode in the direction close to the metal core. The end part of the metal core is provided with a positioning slot into which the positioning rod is inserted; according to the injection mold, before injection molding, the metal core is placed in the cavity of the second mold core, then the driving piece is started to drive the positioning rod to be inserted into the positioning insertion groove in the metal core, then the metal core is locked, and the possibility that the metal core deflects when molten materials are injected is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breaker processing, and in particular to a mold for injection molding of a circuit breaker shaft. Background Art

[0002] In the power industry, circuit breakers are core components of power distribution and protection systems. Their performance, stability, and reliability are directly related to the safe operation of the power grid. The circuit breaker shaft, a key component of the operating mechanism, integrates complex mechanical and electrical performance requirements, making its design and manufacturing process particularly critical.

[0003] Reference Figure 1 and Figure 2 The shaft structure includes a metal core 3, a plastic shell 6 tightly injection-molded on the outside, and a metal sheet 7 embedded or sleeved in these structures to achieve specific functional requirements.

[0004] The existing injection molding process for circuit breaker shafts utilizes a highly efficient compression mold system. This system integrates precision components such as the movable mold, fixed mold, upper and lower mold cores, and a pusher and folding assembly. Through precisely controlled mold opening and closing and molten material injection, it ensures high-quality molding and effective waste separation. However, this system was initially designed for use in vertical injection molding machines, where the metal core is stably positioned horizontally within the lower mold cavity for ease of operation and positioning.

[0005] However, in real-world production environments, some factories, limited by equipment configuration, only have horizontal injection molding equipment. In this scenario, if the original mold design were to be applied directly, the movable and lower molds would need to be repositioned vertically, side-by-side. This directly requires the metal core to be placed vertically within the lower mold cavity. This change introduces new challenges: securing the metal core in a vertical position becomes more difficult, making it prone to loosening or tilting, which in turn negatively impacts injection molding precision and product quality, leaving room for improvement. Utility Model Content

[0006] The purpose of this application is to provide a mold for injection molding of a circuit breaker shaft, so as to solve the problem that when the above mold is used in a horizontal injection molding device, the installation of the metal core may be offset or loosened.

[0007] The present application provides a mold for injection molding of a circuit breaker shaft using the following technical solutions:

[0008] A mold for injection molding of a circuit breaker shaft comprises a static mold and a dynamic mold, wherein a first mold core is embedded in the static mold, and a second mold core is embedded in the dynamic mold, and the first mold core and the second mold core form an injection cavity when they abut against each other; a flow channel communicating with the injection cavity is provided on the static mold; a positioning assembly is fixedly provided on the side of the dynamic mold, and the positioning assembly comprises a push plate slidably mounted on the side of the static mold, a positioning rod fixedly mounted on one side of the push plate, and a driving member fixedly mounted on the side of the dynamic mold, wherein the driving member is used to drive the positioning rod to reciprocate in a direction close to a metal core, and a positioning slot for inserting the positioning rod is provided at the end of the metal core.

[0009] By adopting the above technical solution, due to the installation arrangement of the positioning component, before injection molding, the metal core is pre-placed into the cavity of the second mold core, and then the driving member is started to drive the positioning rod to be inserted into the positioning slot at the end of the metal core, thereby positioning and locking the metal core, reducing the possibility of the metal core being deflected or misplaced when the molten material is subsequently injected.

[0010] Optionally, the cross-sectional dimensions of the positioning rod increase gradually in a direction approaching the driving member.

[0011] By adopting the above technical solution, it is easy to insert the positioning rod into the positioning slot on the metal core.

[0012] Optionally, the driving member includes a driving cylinder fixed on the side of the movable mold, and a guide notch for the push plate to be placed and slide is opened on the side of the movable mold close to the static mold. One side of the push plate is fixedly connected to the end of the telescopic rod of the driving cylinder, and the other side of the push plate is fixedly connected to the end of the positioning rod away from the metal core.

[0013] By adopting the above technical solution, when the driving cylinder is started, the push plate and the positioning rod are driven to slide back and forth, and the positioning rod can be inserted into the positioning slot at the end of the metal core; during this process, the push plate slides in the guide notch, thereby improving the stability of the push plate and the positioning rod during the sliding process.

[0014] Optionally, limiting ridges are fixedly provided on two opposite sides of the push plate, and limiting sliding grooves for the limiting ridges to be inserted and slide are provided on the inner wall of the guide notch.

[0015] By adopting the above technical solution, during the sliding process of the push plate, the limiting protrusion slides synchronously in the limiting sliding groove, thereby further improving the stability of the push plate and the positioning rod during the sliding process.

[0016] Optionally, a locking block is fixedly provided on the side of the static mold close to the movable mold, and a locking notch for inserting the locking block is opened on the push plate.

[0017] By adopting the above technical solution, when the positioning rod is inserted into the positioning slot, the static mold and the dynamic mold are merged, and the locking block on the static mold is inserted into the locking notch on the push plate, thereby locking the push plate and the positioning rod in this state, reducing the possibility of accidentally touching the drive cylinder during the injection process, causing the positioning rod to reset and affecting the product injection quality.

[0018] Optionally, a mounting protrusion is fixedly provided on the side of the locking block facing the static mold, and a mounting groove is provided on the static mold for inserting the mounting protrusion; a fixing thread groove is provided on the mounting protrusion, and a fixing through hole connected to the mounting groove is provided on the static mold, and a locking screw is provided on the side of the static mold which passes through the fixing through hole and is screwed into the fixing thread groove.

[0019] By adopting the above technical solution, during the installation process of the locking block, the installation protrusion is pre-inserted into the corresponding installation groove, and then the user can install and fix the locking block and the static mold by tightening the screw, which facilitates the subsequent disassembly and fixation of the locking block.

[0020] Optionally, a guiding slope is provided on the inner edge of the opening of the locking notch toward the locking block.

[0021] By adopting the above technical solution, the locking block is easily inserted into the locking notch on the push plate along the guiding inclined surface.

[0022] Optionally, the locking block is provided with a guide slope capable of abutting against the guide slope.

[0023] By adopting the above technical solution, after the locking block is inserted into the locking notch, the guiding bevel on the locking block abuts against the guiding bevel on the inner edge of the locking notch, thereby providing installation stability of the locking plate in the locking notch.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Due to the installation setting of the positioning component, before injection molding, the metal core is placed in the cavity of the second mold core in advance, and then the driving member is started to drive the positioning rod to be inserted into the positioning slot at the end of the metal core, thereby locking the metal core in position, reducing the possibility of metal core deflection or dislocation when subsequent molten material is injected. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1It is a schematic diagram of the overall structure of the shaft structure;

[0028] Figure 2 It is a cross-sectional structural diagram reflecting the shaft structure;

[0029] Figure 3 This is a schematic diagram of the overall structure of the embodiment of the present application, which shows the application distribution of the static mold and the dynamic mold;

[0030] Figure 4 It is a cross-sectional structural diagram showing the application distribution of the static mold and the dynamic mold in the embodiment of the present application;

[0031] Figure 5 yes Figure 4 A magnified schematic diagram of part A;

[0032] Figure 6 This is a partial cross-sectional structural diagram of the embodiment of the present application embodying the installation and coordination of the driving member;

[0033] Figure 7 This is a partial structural diagram of the embodiment of the present application showing the installation and coordination of the driving member;

[0034] Figure 8 This is a partial structural diagram of the installation distribution of the driving components in an embodiment of the present application;

[0035] Figure 9 It is a schematic diagram of a partial cross-sectional structure of the locking block installation cooperation according to an embodiment of the present application.

[0036] In the figure, 1. static mold; 11. first mold core; 12. mounting groove; 121. fixing through hole; 2. movable mold; 21. second mold core; 22. guide notch; 221. limiting slide groove; 3. metal core; 31. positioning slot; 4. positioning assembly; 41. driving member; 411. driving cylinder; 42. push plate; 421. limiting ridge; 422. locking notch; 4221. guiding slope; 43. positioning rod; 5. locking block; 51. mounting protrusion; 511. fixing thread groove; 52. guide slope; 6. plastic shell; 7. metal sheet. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0038] Example:

[0039] Reference Figure 3 and Figure 4 A mold for injection molding of a circuit breaker shaft comprises a static mold 1 and a dynamic mold 2. The static mold 1 is embedded with a first mold core 11, and the dynamic mold 2 is embedded with a second mold core 21. The first mold core 11 and the second mold core 21 abut against each other to form an injection cavity. The static mold 1 is provided with a flow channel (not shown in the figure) communicating with the injection cavity.

[0040] During the mold closing process, the first mold core 11 and the second mold core 21 are tightly fitted together to form a closed injection cavity. The molten material is accurately injected through the runner, and can be formed after injection and cooling. Finally, the finished product is taken out. The specific principle will not be repeated here.

[0041] Reference Figure 4 、 Figure 5 and Figure 6 A positioning slot 31 is provided at one end of the metal core 3, and a positioning assembly 4 is fixed to the side of the movable mold 2. The positioning assembly 4 includes a push plate 42 slidably mounted on the side of the static mold 1, a positioning rod 43 fixed to one side of the push plate 42, and a driving member 41 fixed to the side of the movable mold 2. The positioning rod 43 can be inserted into the positioning slot 31, and the driving member 41 is used to drive the positioning rod 43 to reciprocate in the direction close to the metal core 3.

[0042] Before injection molding, the metal core 3 is placed in the cavity of the second mold core 21 in advance, and then the driving member 41 is started to drive the positioning rod 43 to be inserted into the positioning slot 31 at the end of the metal core 3, thereby positioning and locking the metal core 3, reducing the possibility of the metal core 3 being deflected or misplaced when the molten material is subsequently injected.

[0043] Reference Figure 5 、 Figure 6 and Figure 7 The driving member 41 includes a driving cylinder 411 fixed to the side of the movable mold 2; a guide notch 22 for the push plate 42 to be placed and slide is opened on the side of the movable mold 2 close to the static mold 1. One side of the push plate 42 is fixedly connected to the end of the telescopic rod of the driving cylinder 411, and the other side of the push plate 42 is fixedly connected to the end of the positioning rod 43 away from the metal core 3;

[0044] The cross-sectional dimensions of the positioning rod 43 increase gradually in the direction approaching the driving member 41. This arrangement facilitates the insertion of the positioning rod 43 into the positioning slot 31 on the metal core 3. When the driving cylinder 411 is started, it drives the push plate 42 and the positioning rod 43 to slide back and forth, and enables the positioning rod 43 to be inserted into the positioning slot 31 at the end of the metal core 3.

[0045] Reference Figure 8 The push plate 42 has two opposite sides integrally formed with limiting ridges 421, and the inner wall of the guide notch 22 is provided with limiting grooves 221 for the limiting ridges 421 to be inserted and slided, thereby improving the stability of the push plate 42 during the sliding process.

[0046] Reference Figure 9A locking block 5 is fixedly provided on the side of the static mold 1 close to the dynamic mold 2, and a locking notch 422 for inserting the locking block 5 is opened on the push plate 42; when the positioning rod 43 is inserted into the positioning slot 31, the static mold 1 and the dynamic mold 2 are merged, and the locking block 5 on the static mold 1 is inserted into the locking notch 422 on the push plate 42, reducing the possibility of accidentally touching the driving cylinder 411 during the injection process, causing the positioning rod 43 to reset.

[0047] Reference Figure 8 and Figure 9 A guiding slope 4221 is provided on the inner edge of the opening of the locking notch 422 toward the locking block 5, and a guiding slope 52 is provided on the locking block 5 that can abut against the guiding slope 4221; it is convenient for the locking block 5 to be inserted into the locking notch 422 along the guiding slope 4221 and the guiding slope 52 to lock the push plate 42.

[0048] Reference Figure 9 A mounting protrusion 51 is fixedly provided on the side of the locking block 5 facing the static mold 1, and a mounting recess 12 is provided on the static mold 1 for the mounting protrusion 51 to be inserted; a fixing thread groove 511 is provided on the mounting protrusion 51, and a fixing through-hole 121 communicating with the mounting recess 12 is provided on the static mold 1. A locking screw (not shown in the figure) is provided on the side of the static mold 1, which passes through the fixing through-hole 121 and is screwed into the fixing thread groove 511; the user can achieve the installation and fixation of the locking block 5 and the static mold 1 by means of the locking screw.

[0049] The implementation principle of the embodiment of this application is:

[0050] Before injection molding, the metal core 3 is placed in the cavity of the second mold core 21 in advance, and then the driving member 41 is started to drive the positioning rod 43 to be inserted into the positioning slot 31 at the end of the metal core 3, thereby positioning and locking the metal core 3; after the static mold 1 and the dynamic mold 2 are closed, the locking block 5 on the static mold 1 is inserted into the locking notch 422 on the push plate 42, thereby reducing the possibility of accidentally touching the driving cylinder 411 during the injection process, causing the positioning rod 43 to reset.

[0051] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A mold for injection molding of a circuit breaker shaft, comprising a static mold (1) and a dynamic mold (2), wherein a first mold core (11) is embedded in the static mold (1), and a second mold core (21) is embedded in the dynamic mold (2), and the first mold core (11) and the second mold core (21) are abutted to form an injection cavity; and a flow channel communicating with the injection cavity is opened on the static mold (1); It is characterized by: A positioning assembly (4) is fixedly provided on the side of the movable mold (2), and the positioning assembly (4) comprises a push plate (42) slidably provided on the side of the static mold (1), a positioning rod (43) fixed on one side of the push plate (42), and a driving member (41) fixed on the side of the movable mold (2), wherein the driving member (41) is used to drive the positioning rod (43) to move back and forth in a direction close to the metal core (3), and a positioning slot (31) for the positioning rod (43) to be inserted is provided at the end of the metal core (3).

2. A mold for injection molding of a circuit breaker shaft according to claim 1, characterized in that: The cross-sectional dimensions of the positioning rod (43) increase gradually in a direction approaching the driving member (41).

3. The mold for injection molding of a circuit breaker shaft according to claim 1, characterized in that: The driving member (41) includes a driving cylinder (411) fixed on the side of the movable mold (2); a guide notch (22) for a push plate (42) to be placed and slide is provided on the side of the movable mold (2) close to the static mold (1); one side of the push plate (42) is fixedly connected to the end of the telescopic rod of the driving cylinder (411); the other side of the push plate (42) is fixedly connected to the end of the positioning rod (43) away from the metal core (3).

4. The mold for injection molding of a circuit breaker shaft according to claim 3, characterized in that: The push plate (42) is fixedly provided with limiting convex strips (421) on the two opposite sides, and the inner wall of the guide notch (22) is provided with a limiting sliding groove (221) for the limiting convex strips (421) to be inserted and slid.

5. The mold for injection molding of a circuit breaker shaft according to claim 1, characterized in that: A locking block (5) is fixedly provided on the side of the static mold (1) close to the movable mold (2), and a locking notch (422) for inserting the locking block (5) is provided on the push plate (42).

6. The mold for injection molding of a circuit breaker shaft according to claim 5, characterized in that: A mounting protrusion (51) is fixedly provided on the side of the locking block (5) facing the static mold (1), and a mounting recess (12) for inserting the mounting protrusion (51) is provided on the static mold (1); A fixing thread groove (511) is provided on the mounting protrusion (51), a fixing through hole (121) communicating with the mounting recess (12) is provided on the static mold (1), and a locking screw is provided on the side surface of the static mold (1) and passes through the fixing through hole (121) and is screwed into the fixing thread groove (511).

7. The mold for injection molding of a circuit breaker shaft according to claim 5, characterized in that: The inner edge of the opening of the locking notch (422) facing the locking block (5) is provided with a guiding slope (4221).

8. The mold for injection molding of a circuit breaker shaft according to claim 7, characterized in that: The locking block (5) is provided with a guide inclined surface (52) capable of abutting against the guide inclined surface (4221).

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