Injection mold of circuit breaker

Abstract

An injection mold of a circuit breaker comprises a base, a lower mold, an upper mold and a fixing rod which is arranged on the base and used for providing movement guiding for the upper mold and the lower mold, a mold cavity is formed in the top end of the lower mold, a mold base combined with the mold cavity is fixed to the bottom end of the upper mold, the base comprises a main body and auxiliary bodies located on the two sides of the main body, and the main body is provided with an assembly base face. The auxiliary body is provided with an assembly matching face making contact with the assembly base face, the assembly base face and the assembly matching face are each provided with an imbedding space allowing the fixing rod to be placed therein, and the two imbedding spaces form a complete round hole after the main body and the auxiliary body are spliced. The assembly base surface is provided with a plurality of guide rods providing movement guide for the auxiliary body and an extension body located below the auxiliary body and having a reserved distance with the auxiliary body, and the extension body is provided with two abutting blocks which are symmetrically distributed on the two sides and abut against the auxiliary body so as to prevent the main body and the auxiliary body from being separated after the assembly base surface makes contact with the assembly matching surface.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker production, in particular to an injection mold for a circuit breaker. Background Art

[0002] A circuit breaker is a common switching device used in power distribution systems. By using a circuit breaker, it can close, carry, and disconnect the current under normal circuit conditions. The external plastic shell and accessories such as the middle cover of the circuit breaker need to be injection molded using a mold during processing.

[0003] Publication (Announcement) No.: CN217319135U discloses a molding die for processing the middle cover of a molded case circuit breaker, comprising a base, a lower die provided at the top of the base, fixing rods vertically fixed at the four corners of the top of the base, an upper die provided at the top of the lower die, a mold base fixed at the bottom of the upper die, a mold cavity provided inside the top of the lower die, an inner cavity provided inside the lower die, and a cavity provided inside the bottom of the lower die. This molding die can be used to injection mold different types of circuit breaker middle covers by replacing the upper and lower dies adapted to different types of circuit breaker middle covers, and both the upper and lower dies are mounted on the fixing rods using through holes and can be moved. However, there is a defect, namely, when replacing, the base must first be fixed with the help of a fixing auxiliary tool, and then the upper and lower dies must be disassembled one by one, which is relatively cumbersome. At the same time, the fixing rods and the base are connected by threads, which restricts the overall disassembly, namely, each fixing rod needs to be disengaged from the threaded hole, which is also relatively cumbersome. Utility Model Content

[0004] The present invention aims to solve the above-mentioned shortcomings of the prior art and provides an injection mold for a circuit breaker to solve the above-mentioned problems.

[0005] The utility model solves its technical problems by adopting a technical solution: the injection mold of the circuit breaker includes a base, a lower mold, an upper mold, and a fixed rod arranged on the base and used to provide a movement guide for the upper mold and the lower mold; a mold cavity is provided inside the top end of the lower mold; a mold base combined with the mold cavity is fixed to the bottom end of the upper mold; the base includes a main body and sub-bodies located on both sides thereof; the main body has an assembly base surface; the sub-body has an assembly mating surface in contact with the assembly base surface; both the assembly base surface and the assembly mating surface are formed with insertion spaces for the fixed rods to be placed therein, and the two insertion spaces form a complete circular hole after the main body and the sub-body are assembled; a plurality of guide rods are provided on the assembly base surface to provide a movement guide for the sub-body, and an extension body is located below the sub-body and has a reserved spacing therefrom; the extension body is provided with two stop blocks symmetrically distributed on both sides and abutting against the sub-body to prevent the main body and the sub-body from separating after contacting the assembly base surface and the assembly mating surface.

[0006] Further improvement is formed in that a locking rod is provided in the insertion space on the assembly base surface to prevent the fixing rod from being separated when the fixing rod is placed therein, and a locking socket combined with the locking rod is provided on the fixing rod.

[0007] For further improvement, a limit block is provided at the end of the guide rod that is not connected to the assembly base surface to prevent the auxiliary body from detaching from the guide rod. The auxiliary body has an assembly back side opposite to the assembly mating surface. Hidden holes are provided on the assembly back side that match the number and position of the guide rods and are connected to the guide holes that realize the displacement of the auxiliary body on the guide rod.

[0008] For further improvement, the stop block has a transverse section and a vertical section arranged perpendicular to it, the lower end surface of the transverse section is provided with a first plug block inserted into a socket formed on the extension body, and the vertical section is provided on the side surface close to the back of the assembly with a second plug block inserted into a slot formed on the back of the assembly.

[0009] Further improvement is that a synchronization rod arranged on the transverse section is provided between two adjacent stop blocks located on the same side.

[0010] For further improvement, guide grooves symmetrically distributed on both sides are formed on the upper end face of the extension body, and a slider group matching the position and number of the guide grooves is provided on the lower end face of the auxiliary body. Each slider group has two sliders, and the part where the slider contacts the inner bottom surface of the guide groove is an arc configuration.

[0011] The beneficial effects of the utility model are:

[0012] According to the present invention, when replacing the lower mold and the upper mold, there is no need to remove the lower mold and the upper mold from the fixing rod. That is, it is only necessary to remove the fixing rod from the base to remove the lower mold and the upper mold together. This overall disassembly method is more convenient than disassembling one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a structural diagram of the base of the utility model;

[0015] Figure 3 This is a schematic diagram of the exploded structure of the base of the utility model, used to show the state where one of the auxiliary bodies and the main body are not assembled together;

[0016] Figure 4 This is a schematic diagram of the full cross-section structure of the base of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Referring to the accompanying drawings: This type of injection mold for a circuit breaker includes a base 1, a lower mold 2, an upper mold 3, and a fixing rod 4 provided on the base 1 and used to provide a guide for the upper mold 3 and the lower mold 2 to move. A mold cavity 21 is provided inside the top of the lower mold 2, and a mold base 31 is fixed to the bottom end of the upper mold 3 to be combined with the mold cavity 21. The base 1 includes a main body 11 and sub-bodies 12 located on both sides thereof. The main body 11 has an assembly base surface 11-a, and the sub-body 12 has an assembly mating surface 12-a in contact with the assembly base surface 11-a. The assembly base surface 11-a and the assembly mating surface 12-a are in contact with each other. The surfaces 12-a are each formed with insertion spaces 5 for placing the fixing rods 4 therein, and the two insertion spaces 5 form a complete circular hole after the main body 11 and the auxiliary body 12 are assembled. The assembly base surface 11-a is provided with a number of guide rods 6 for providing movement guidance for the auxiliary body 12, and an extension body 7 located below the auxiliary body 12 and with a reserved spacing therefrom. The extension body 7 is provided with two stop blocks 8 symmetrically distributed on both sides and abutting against the auxiliary body 12 to prevent the main body 11 and the auxiliary body 12 from separating after the assembly base surface 11-a and the assembly mating surface 12-a come into contact. The principle of the present invention is that when replacing the lower mold 2 and the upper mold 3, there is no need to remove the lower mold 2 and the upper mold 3 from the fixing rod 4, that is, it is only necessary to remove the fixing rod 4 from the base 1 to remove the lower mold 2 and the upper mold 3 together. This method of disassembling the entire body is more convenient than the method of disassembling one by one. When assembling or disassembling, it is only necessary to place the fixing rod 4 with the lower mold 2 and the upper mold 3 into the insertion space 5, and then use the assembly and splicing of the main body 11 and the auxiliary body 12 to confine the fixing rod 4 in the insertion space 5. This method does not require the cumbersome method of threaded connection as in the prior art. The guide rod 6 is used to provide support and guidance for the auxiliary body 12, so that the auxiliary body 12 can always keep its upper end surface and the upper end surface of the main body 11 at the same level while moving. The extension body 7 provides installation for the stop block 8, and after the stop block 8 is installed, it prevents the main body 11 and the auxiliary body 12 from separating after contacting the assembly base surface 11-a and the assembly mating surface 12-a, so that the fixing rod 4 always remains in the insertion space 5.

[0019] A locking rod 51 is provided in the insertion space 5 formed on the assembly base surface 11-a to prevent the fixing rod 4 from detaching when the fixing rod 4 is placed therein. A locking socket 41 is provided on the fixing rod 4 to be combined with the locking rod 51. The locking rod 51 and the fixing rod 4 are arranged vertically, so that after the locking rod 51 is inserted into the locking socket 41, it can exist in the vertical direction of the fixing rod 4 to constrain the vertical movement of the fixing rod 5. In this way, when the upper mold 3 is demolded, the fixing rod 4 will not move with it and will always remain stationary.

[0020] A limit block 61 is provided at one end of the guide rod 6 that is not connected to the assembly base surface 11-a to prevent the sub-body 12 from separating from the guide rod 6. The sub-body 12 has an assembly back side 12-b opposite to the assembly mating surface 12-a. The assembly back side 12-b is provided with a hidden hole 12-b1 that matches the number and position of the guide rod 6 and is connected to the guide hole 12-c for realizing the displacement of the sub-body 12 on the guide rod 6. The limit block 61 exists in the moving direction of the sub-body 12 away from the main body 11, and is used to prevent the sub-body 12 from separating from the guide rod 6. This is achieved by utilizing the size difference between the limit block 61 and the guide hole 12-c (the outer diameter of the limit block 61 is larger than the inner diameter of the guide hole 12-c). In this embodiment, the guide rod 6 and the main body 11 are detachably connected, which is achieved by threaded connection or plug-in (satisfactory fit). Generally, a threaded connection is adopted, that is, the guide rod 6 is connected to the main body 11 after passing through the guide hole 12-c set on the sub-body 12. This not only makes it convenient to remove or install the guide rod 6, but also does not require adjusting the position between each guide rod 6 after the installation is completed. The guide rod 6 can be screwed to the bottom.

[0021] The stop block 8 has a transverse section 81 and a vertical section 82 arranged perpendicular to it. A first plug block 81-a is provided on the lower end face of the transverse section 81 and is inserted into the socket 71 formed on the extension body 7. A second plug block 82-a is provided on the side of the vertical section 82 close to the assembly back side 12-b and is inserted into the slot 12-b2 formed on the assembly back side 12-b. When setting the stop block 8, the second plug block 82-a is first inserted into the slot 12-b2. The slot 12-b2 is also arranged vertically. In this way, when the second plug block 82-a is inserted into the final position of the slot 12-b2, the first plug block 81-a can also be synchronously inserted into the socket 71. The slot 12-b2 can not only increase the structural pulling effect of the stop block 8 when acting on the sub-body 12, but also has a positioning effect.

[0022] There is a synchronization rod 9 arranged on the transverse section 81 between two adjacent stop blocks 8 located on the same side, so that when the stop blocks 8 are installed or removed, the synchronization rod 9 can be used to synchronize the installation or removal of the two stop blocks 8, which is convenient and quick.

[0023] The upper end surface of the extension body 7 is formed with guide grooves 72 symmetrically distributed on both sides, and the lower end surface of the auxiliary body 12 is provided with a slider group 10 whose position and number match the guide grooves 72. Each slider group 10 has two sliders, and the part where the slider contacts the inner bottom surface of the guide groove 72 is an arc configuration. Such a setting enables the auxiliary body 12 to have a lower support. The guide groove 72 uses its own limited space and guiding function to enable the slider group 10 to move along its guiding direction, and the setting of the arc-shaped configuration of the contact part can also reduce the contact area, thereby making the movement of the auxiliary body 12 smoother.

[0024] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. An injection mold for a circuit breaker, comprising a base (1), a lower mold (2), an upper mold (3), and a fixing rod (4) arranged on the base (1) and used to provide a movement guide for the upper mold (3) and the lower mold (2), wherein a mold cavity (21) is provided inside the top end of the lower mold (2), and a mold base (31) combined with the mold cavity (21) is fixed at the bottom end of the upper mold (3), characterized in that: The base (1) comprises a main body (11) and auxiliary bodies (12) located on both sides thereof, wherein the main body (11) has an assembly base surface (11-a), and the auxiliary body (12) has an assembly mating surface (12-a) in contact with the assembly base surface (11-a), and both the assembly base surface (11-a) and the assembly mating surface (12-a) are formed with an insertion space (5) for the fixing rod (4) to be placed therein, and the two insertion spaces (5) are formed after the main body (11) and the auxiliary body (12) are assembled. The assembly base (11-a) is provided with a plurality of guide rods (6) for providing movement guidance for the auxiliary body (12), and an extension body (7) located below the auxiliary body (12) and having a reserved spacing therefrom. The extension body (7) is provided with two stop blocks (8) symmetrically distributed on both sides and abutting against the auxiliary body (12) to prevent the main body (11) and the auxiliary body (12) from separating after contacting the assembly base (11-a) and the assembly mating surface (12-a).

2. The injection mold for the circuit breaker according to claim 1, characterized in that: A locking rod (51) is provided in the insertion space (5) formed on the assembly base surface (11-a) to prevent the fixing rod (4) from being disengaged when the fixing rod (4) is placed therein, and a locking socket (41) is provided on the fixing rod (4) to be combined with the locking rod (51).

3. The injection mold for a circuit breaker according to claim 1, characterized in that: The end of the guide rod (6) not connected to the assembly base surface (11-a) is provided with a limit block (61) for preventing the auxiliary body (12) from detaching from the guide rod (6); the auxiliary body (12) has an assembly back surface (12-b) opposite to the assembly mating surface (12-a); and the assembly back surface (12-b) is provided with hidden holes (12-b1) that match the number and position of the guide rod (6) and are connected to the guide hole (12-c) for enabling the auxiliary body (12) to be displaced on the guide rod (6).

4. The injection mold for the circuit breaker according to claim 3, characterized in that: The stop block (8) comprises a transverse section (81) and a vertical section (82) arranged perpendicular thereto. A first plug block (81-a) is provided on the lower end surface of the transverse section (81) and is inserted into the insertion hole (71) formed on the extension body (7). A second plug block (82-a) is provided on the side surface of the vertical section (82) close to the assembly back surface (12-b) and is inserted into the slot (12-b2) formed on the assembly back surface (12-b).

5. The injection mold for the circuit breaker according to claim 4, characterized in that: A synchronization rod (9) arranged on the transverse section (81) is provided between two adjacent stop blocks (8) located on the same side.

6. The injection mold for a circuit breaker according to claim 1, characterized in that: The upper end surface of the extension body (7) is formed with guide grooves (72) symmetrically distributed on both sides, and the lower end surface of the auxiliary body (12) is provided with a slider group (10) whose position and number match the guide groove (72), and each slider group (10) has two sliders, and the portion of the slider that contacts the inner bottom surface of the guide groove (72) is in an arc configuration.

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