A compression mold and process for circuit breaker base

Abstract

The present application relates to the field of injection molding, and specifically discloses an injection mold and process for a circuit breaker base. The mold comprises a movable mold and a fixed mold, wherein a lower mold core is provided on the movable mold, an upper mold core is provided on the fixed mold, and the upper mold core and the lower mold core enclose a cavity for molding the circuit breaker base. The fixed mold is provided with a main flow channel, and the movable mold is provided with a pusher assembly and a folding assembly. The pusher assembly comprises a pusher plate slidably mounted on the movable mold and a plurality of pusher rods connected to the pusher plate, the pusher rods extending through and slidingly mounted on the lower mold core. The folding assembly comprises a folding plate slidably mounted on the movable mold and a folding block connected to the folding plate, the folding plate being located on a side of the pusher plate away from the lower mold core, the folding block extending through and slidingly mounted on a stripper plate and the lower mold core, and the folding block, the upper mold core, and the lower mold core enclose a shunt channel connected to both the main flow channel and the cavity. The present application has the effect of improving the production efficiency of circuit breaker bases.

Description

Technical Field

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

[0002] Injection molding is a molding method developed from compression molding. The raw material is melted and injected into the mold cavity. The raw material continues to be heated and pressurized in the mold cavity to be fixed and solidified.

[0003] In related technologies, such as Figure 1 A circuit breaker base is shown, which is produced by injection molding.

[0004] During the implementation of this application, the inventors discovered that there are at least the following problems in this technology: when the circuit breaker base is produced by injection molding, runner waste will be connected to the circuit breaker base, and the runner waste needs to be manually cut and separated by staff, which is a cumbersome operation and affects the production efficiency of the circuit breaker base. Summary of the Invention

[0005] In order to improve the production efficiency of the circuit breaker base, the present application provides an injection mold and process for the circuit breaker base.

[0006] In the first aspect, the present application provides an injection mold for a circuit breaker base adopting the following technical solution:

[0007] An injection mold for a circuit breaker base, comprising a movable mold and a fixed mold, wherein the movable mold is provided with a lower mold core, and the fixed mold is provided with an upper mold core, wherein the upper mold core and the lower mold core enclose a cavity for forming the circuit breaker base, the fixed mold is provided with a main flow channel, and the movable mold is provided with a material pushing assembly and a material folding assembly;

[0008] The pusher assembly includes a pusher plate slidably arranged on the movable mold and a plurality of pusher rods connected to the pusher plate, wherein the pusher rods penetrate and are slidably arranged on the lower mold core;

[0009] The folding assembly includes a folding plate slidably set on the movable mold and a folding block connected to the folding plate. The folding plate is located on the side of the push plate away from the lower mold core. The folding block penetrates and is slidably set on the push plate and the lower mold core. The folding block, the upper mold core and the lower mold core enclose a diversion channel connected to the main channel and the cavity.

[0010] By adopting the above technical solution, during injection molding, raw material is injected through the main channel, flows through the main channel into the branch channel, and finally flows into the mold cavity. After molding, the raw material in the mold cavity forms the circuit breaker base, and the waste material in the main channel and branch channel forms the runner waste.

[0011] When demolding the circuit breaker base, first separate the movable mold from the fixed mold, then move the folding plate toward the fixed mold, and the folding plate drives the folding block to move. The folding block presses against the connection between the runner waste and the circuit breaker base and applies a force to the runner waste away from the movable mold, so that the connection between the runner waste and the circuit breaker base is bent.

[0012] As the folding plate continues to move, the folding plate presses against the pushing plate to drive the pushing plate to move, and the pushing plate drives the pushing rod to move to push the circuit breaker base and the runner waste out of the lower cavity.

[0013] After the connection between the runner waste and the circuit breaker base is bent, the workers do not need to cut it manually. They can separate the runner waste from the circuit breaker base by bending, thereby improving the production efficiency of the circuit breaker base.

[0014] Optionally, the mold cavity includes an upper cavity body opened on the upper mold core and a lower cavity body opened on the lower mold core, the lower mold core is provided with a lower cavity body connected to the pressure-keeping groove, the pressure-keeping groove is located on the outside of the lower cavity, the upper mold core is provided with a pressure-keeping protrusion, the upper cavity body is located on the inner side of the pressure-keeping protrusion, and the pressure-keeping protrusion is inserted in the pressure-keeping groove.

[0015] By adopting this technical solution, when the mold is closed, the pressure-retaining protrusion on the upper mold core is inserted into the pressure-retaining groove, and the upper and lower cavities are combined to form a forming cavity. Because the upper cavity is located inside the pressure-retaining protrusion and the lower cavity is located inside the pressure-retaining groove, this not only improves the stability of the cooperation between the upper and lower mold cores and minimizes their relative movement, but also improves the pressure retention effect during mold closing.

[0016] Optionally, the pressure-maintaining protrusion includes an inner protrusion fixed on the upper mold core and an outer protrusion slidably set on the upper mold core along the mold opening direction, the outer protrusion is sleeved on the inner protrusion, and the lower mold core is provided with a stop assembly to limit the separation of the outer protrusion and the lower mold core.

[0017] By adopting this technical solution, during injection molding, some raw material tends to overflow between the pressure-retaining protrusion and the wall of the pressure-retaining groove, forming a ring-shaped waste material at the edge of the circuit breaker base. During mold separation, the movable mold is first separated from the fixed mold. At this time, the stop assembly restricts the outer protrusion from separating from the lower mold core. The upper mold core and the inner protrusion move relative to the outer protrusion, while the outer protrusion maintains its pressure against the ring-shaped waste material. The pusher assembly then pushes the circuit breaker base out of the lower cavity. During this movement, the connection between the ring-shaped waste material and the circuit breaker base is broken.

[0018] This arrangement enables the workers to cut and separate the annular waste after taking out the circuit breaker base, further improving the production efficiency of the circuit breaker base.

[0019] Optionally, a mounting groove is provided on the groove wall of the pressure-maintaining groove, and the stop assembly is arranged in the mounting groove. The stop assembly includes a stop block and a stop spring. The stop block is slidably provided in the mounting groove, and the stop spring is connected to the stop block. When the stop spring is in a natural state, the end of the stop block extends out of the mounting groove, and the end of the stop block that can extend out of the mounting groove is provided with a movable inclined surface, and the movable inclined surface faces the upper mold core. A stop groove for inserting the end of the stop block is provided on the end surface of the outer protrusion away from the inner protrusion.

[0020] By adopting the above technical solution, when the mold is closed, the outer protrusion presses against the movable inclined surface to apply force to the stop block, so that the stop block is completely moved into the installation groove until the mold is closed. At this time, under the action of the stop spring, the end of the stop block is inserted into the stop groove to limit the movement of the outer protrusion relative to the lower mold core.

[0021] With this arrangement, after the mold is closed, the outer protrusion is automatically locked on the lower mold core, without the need for additional operation by the staff, which improves the convenience of using the injection mold.

[0022] Optionally, a connecting assembly is provided on the outer protrusion, and the connecting assembly includes a limit block and a connecting rod with one end connected to the limit block, and the other end of the connecting rod is connected to the outer protrusion. A limit groove is provided on the end surface of the fixed mold facing away from the movable mold, and the limit groove extends into the upper mold core. A connecting hole that passes through the upper mold core is provided at the bottom of the limit groove, and the limit block is slidably set in the limit groove, and the connecting rod is slidably set in the connecting hole. The cross-sectional width of the limit block is greater than the aperture of the connecting hole.

[0023] By adopting this technical solution, during mold separation, the inner protrusion moves relative to the outer protrusion, the limit block slides in the limit slot, and the connecting rod slides in the limit slot and the connecting hole. Because the cross-sectional width of the limit block is larger than the diameter of the connecting hole, the limit block is restricted from moving out of the limit hole, thereby ensuring that the outer protrusion and the upper mold core can always maintain connection.

[0024] Such an arrangement ensures that the outer protrusion can move relative to the inner protrusion on the one hand, and limits the outer protrusion from falling off on the inner protrusion during the mold closing process on the other hand.

[0025] Optionally, the connecting assembly further comprises a reset spring, the two ends of which respectively contact the end face of the limit block close to the bottom of the limit groove and the bottom of the limit groove; when the reset spring is in a natural state, the outer protrusion contacts the upper mold core.

[0026] By adopting this technical solution, when the mold is separated, the upper and lower molds are first separated. The outer projection then slides relative to the upper mold, the stop block slides in the stop slot, and the return spring compresses. After the connection between the annular waste and the circuit breaker base is broken, the stop block is retracted into the mounting slot. The return spring activates the stop block, which then moves and resets itself. This, in turn, drives the outer projection via the connecting rod until it resets to contact with the upper mold. The return spring ensures the outer projection automatically resets, further enhancing the ease of use of the injection mold.

[0027] Optionally, a reset rod is connected to the push plate, a reset hole extending into the lower die core is opened on the movable mold, the reset hole is connected to the mounting groove, the reset rod is slidably arranged in the reset hole, a reset groove for inserting the end of the reset rod is opened on the end surface of the stop block close to the reset hole, and a reset inclined surface is provided between the groove wall of the reset groove close to the bottom of the mounting groove and the end surface of the stop block close to the reset hole;

[0028] When the stop spring is in a natural state, the reset inclined surface is aligned with the reset hole; when the end of the reset rod is inserted into the reset groove, the stop block is completely located in the installation groove.

[0029] By adopting this technical solution, when the circuit breaker base is pushed out of the lower cavity, the push plate moves, driving the push rod, which in turn drives the reset rod. After the circuit breaker base is separated from the annular waste, the reset rod moves until its end presses against the reset slope. The reset slope drives the stop block into the installation slot, and the external protrusion can now move and reset under the action of the stop block, the limit block, and the reset spring.

[0030] With this arrangement, after the circuit breaker base is ejected and demoulded, the outer protrusion automatically resets, further improving the convenience of using the injection mold.

[0031] Optionally, a hook groove is provided on the end surface of the outer protrusion facing the inner protrusion, and the hook groove is connected with the end surface of the outer protrusion facing the lower mold core. The distance between the groove wall of the hook groove away from the inner protrusion and the inner protrusion decreases along the direction from the upper mold core to the lower mold core. A disengagement groove is provided on the end surface of the inner protrusion facing the lower mold core, and a disengagement assembly is provided in the disengagement groove. The disengagement assembly includes a disengagement block slidably arranged in the disengagement groove and a disengagement spring connected to the disengagement block. When the disengagement spring is in a natural state, the end of the disengagement block extends out of the disengagement groove.

[0032] By adopting this technical solution, when the mold is closed, the disengagement block presses against the wall of the pressure-holding groove and is retracted into the disengagement groove, compressing the disengagement spring. When the mold is opened, the inner protrusion moves relative to the outer protrusion, and the disengagement spring acts to reset the disengagement block so that its end protrudes out of the disengagement groove.

[0033] Because the outer protrusion has a hook groove on its end facing the inner protrusion, any waste material that overflows during molding will enter the groove and form a hook-shaped waste material. The ring-shaped waste material is connected to the outer protrusion through the hook-shaped waste material and the hook groove. When the outer protrusion is reset, it will drive the ring-shaped waste material directly out of the lower cavity of the lower mold. The ring-shaped waste material collides with the separation block, causing it to separate from the hook-shaped waste material and fall from the upper mold, or the hook-shaped waste material will directly escape from the hook groove.

[0034] Such an arrangement further improves the production efficiency of the circuit breaker base.

[0035] In the second aspect, the present application provides a process using the following technical solutions:

[0036] A process comprising the following steps:

[0037] S1: mold closing 70%-95%;

[0038] S2: Inject 70%-90% of the raw materials into the mold at least three times, and after each injection, completely close the mold and open it to the closing ratio in S1 for deflation;

[0039] S3: Inject the remaining raw material and maintain pressure to cure for 40-60 seconds.

[0040] By adopting the above technical solution, the strength and compressive strength of the circuit breaker base are effectively improved through multiple injections, multiple complete mold closing and pressure holding, and multiple deflations.

[0041] Optionally, the deflation time in S2 is 10-25 seconds.

[0042] By adopting the above technical solution, the deflation time is set in this way, on the one hand, to ensure that the air in the raw material can be discharged smoothly, and on the other hand, to avoid excessive loss of raw material temperature during molding due to deflation.

[0043] In summary, this application includes at least one of the following beneficial technical effects:

[0044] 1. When the circuit breaker base is demoulded, the connection between the runner waste material and the circuit breaker base is bent by the folding component, so that the staff can separate the runner waste material and the circuit breaker base by bending, thereby improving the production efficiency of the circuit breaker base;

[0045] 2. Through the outer protrusion, the inner protrusion and the stop assembly, when the circuit breaker base is pushed out from the lower cavity, the annular waste is separated from the circuit breaker base, thereby further improving the production efficiency of the circuit breaker base. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural diagram of background technology.

[0047] Figure 2 It is a structural diagram of Example 1 of the present application.

[0048] Figure 3 It is a cross-sectional schematic diagram of Example 1 of the present application.

[0049] Figure 4 This is an exploded schematic diagram highlighting the lower mold core in Example 1 of the present application.

[0050] Figure 5 This is an exploded schematic diagram highlighting the upper mold core in Example 1 of the present application.

[0051] Figure 6 It is a structural schematic diagram highlighting the upper mold core in Example 2 of the present application.

[0052] Figure 7 It is a partial cross-sectional schematic diagram highlighting the detached component in Example 2 of the present application.

[0053] Figure 8 It is a partial cross-sectional schematic diagram highlighting the connection holes and limiting grooves in Example 2 of the present application.

[0054] Figure 9 It is a partial cross-sectional schematic diagram highlighting the stop assembly in Example 2 of the present application.

[0055] Description of reference numerals:

[0056] 1. Movable mold; 11. Reset hole; 2. Fixed mold; 21. Main flow channel; 22. Branch flow channel; 23. Limiting groove; 24. Connecting hole; 3. Lower mold core; 31. Pressure holding groove; 311. Mounting groove; 32. Lower cavity; 4. Upper mold core; 41. Upper cavity; 42. Pressure holding protrusion; 421. External protrusion; 4211. Hook groove; 4212. Stop groove; 422. Internal protrusion; 4221. Release groove; 423. Release assembly; 4231. Release Block; 4232, disengagement spring; 5, pushing assembly; 51, pushing plate; 52, pushing rod; 53, supporting column; 54, reset rod; 6, folding assembly; 61, folding plate; 62, folding block; 63, transmission rod; 7, connecting assembly; 71, limit block; 72, connecting rod; 73, reset spring; 8, stop assembly; 81, stop block; 811, moving inclined plane; 812, reset groove; 813, reset inclined plane; 82, stop spring. DETAILED DESCRIPTION

[0057] The following is combined with Figure 2-9 This application is described in further detail.

[0058] An embodiment of the present application discloses a pressure injection process for a circuit breaker.

[0059] Example 1:

[0060] Reference Figure 2 、 Figure 3 The injection molding process for the circuit breaker includes a movable mold 1, a fixed mold 2, two lower mold cores 3 embedded in the movable mold 1, two upper mold cores 4 embedded in the fixed mold 2, a pushing assembly 5 for pushing out the circuit breaker base, and a folding assembly 6 arranged on the movable mold 1. The lower mold cores 3 correspond to different upper mold cores 4.

[0061] Reference Figure 4 、 Figure 5 The lower mold core 3 defines a pressure-retaining groove 31 and a lower cavity 32. The pressure-retaining groove 31 communicates with the lower cavity 32 and is located outside the lower cavity 32. The upper mold core 4 defines an upper cavity 41, integrally formed with a pressure-retaining protrusion 42, which is located outside the upper cavity 41. The upper cavity 41 and the lower cavity 32 enclose a mold cavity for forming the circuit breaker base. The pressure-retaining protrusion 42 is inserted into the pressure-retaining groove 31.

[0062] Reference Figure 3 The folding assembly 6 includes a folding plate 61 that slides on the movable mold 1 along the mold opening direction and a plurality of folding blocks 62 fixed to the folding plate 61. A transmission rod 63 is fixed to the folding plate 61, and the transmission rod 63 passes through and slides on the movable mold 1 along the mold opening direction. The folding blocks 62 pass through and slide on the movable mold 1 and the lower mold core 3 along the mold opening direction. The folding blocks 62 and the cavity wall of the mold cavity enclose a branch channel 22. The main channel 21 is opened on the fixed mold 2, and the main channel 21 extends into the upper mold core 4. The branch channel 22 is connected to the main channel 21 and the mold cavity.

[0063] Reference Figure 3 The pusher assembly 5 includes a pusher plate 51 that is slidably mounted on the movable mold 1 along the mold opening direction, and a plurality of pusher rods 52 fixed to the pusher plate 51. The pusher rods 52 are slidably mounted on the movable mold 1 and the lower mold core 3 along the mold opening direction. The folding plate 61 is located on the side of the pusher plate 51 away from the lower mold core 3. The folding block 62 is slidably mounted on the pusher plate 51 along the mold opening direction.

[0064] Reference Figure 3 A plurality of support columns 53 for contacting the push plate 51 are provided on one side of the push plate 51 close to the folding plate 61. The support columns 53 are fixed on the movable mold 1. The folding plate 61 is slidably set on the support columns 53. The folding plate 61 can slide until there is a gap between it and the push plate 51.

[0065] The implementation principle of Example 1 is as follows: when producing the circuit breaker base, the mold is first closed, and the pressure-holding protrusion 42 is inserted into the pressure-holding groove 31, and the upper cavity 41 and the lower cavity 32 enclose a mold cavity. Then, the raw material is injected through the main channel 21, and the raw material flows into the mold cavity through the branch channel 22 to form the circuit breaker base. When removing the circuit breaker base, the mold is first separated, and then the folding plate 61 is driven to move by the push rod 52. The folding plate 61 pushes the folding block 62 to move, so that the connection between the flow channel waste and the circuit breaker base is bent. As the folding plate 61 moves, the folding plate 61 presses against the push plate 51 and drives the push plate 51 to move. The push plate 51 pushes the circuit breaker base out of the lower cavity 32 through the push rod 52.

[0066] Since the runner waste and the circuit breaker base are bent, the workers can separate the runner waste from the circuit breaker base by bending, thereby improving the processing efficiency of the circuit breaker base.

[0067] Example 2:

[0068] Reference Figure 6 The difference between this embodiment and embodiment 1 is that the pressure-maintaining protrusion 42 includes an inner protrusion 422 and an outer protrusion 421. The inner protrusion 422 is integrally formed on the upper mold core 4, and the outer protrusion 421 is slidably sleeved on the outer protrusion 421 along the mold opening direction.

[0069] Reference Figure 6 、 Figure 7 The inner protrusion 422 has a plurality of disengagement slots 4221 on the end surface facing the lower die core 3. Each disengagement slot 4221 is provided with a disengagement assembly 423. The disengagement assembly 423 includes a disengagement block 4231 and a disengagement spring 4232. The disengagement block 4231 is slidably disposed in the disengagement slot 4221. The two ends of the disengagement spring 4232 are fixedly connected to the bottom of the disengagement slot 4221 at the end surface of the disengagement block 4231 near the bottom of the disengagement slot 4221. The disengagement spring 4232 extends and contracts along the sliding direction of the disengagement block 4231. When the disengagement spring 4232 is in its natural state, the end of the disengagement block 4231 extends out of the disengagement slot 4221.

[0070] Reference Figure 6 、 Figure 7 A plurality of hook grooves 4211 are provided on the end surface of the outer protrusion 421 facing the inner protrusion 422. The hook grooves 4211 are connected to the end surface of the outer protrusion 421 facing the lower mold core 3. The distance between the groove wall of the hook groove 4211 away from the inner protrusion 422 and the inner protrusion 422 decreases along the direction from the upper mold core 4 to the lower mold core 3.

[0071] Reference Figure 6, multiple groups of connecting components 7 are provided on the outer protrusion 421, and the connecting components 7 include a limit block 71, a connecting rod 72 and a return spring 73. One end of the connecting rod 72 is fixed on the limit block 71, and the other end of the connecting rod 72 is fixed on the outer protrusion 421. The diameter of the limit block 71 is larger than that of the connecting rod 72.

[0072] Reference Figure 6 、 Figure 8 The fixed mold 2 is provided with a limit groove 23 on the end surface away from the movable mold 1, which is the same number as the connecting components 7. The limit grooves 23 extend into the upper mold core 4. The bottom of the limit grooves 23 is provided with a connecting hole 24 that penetrates the upper mold core 4. Both the limit grooves 23 and the connecting hole 24 extend along the mold opening direction. Each limit block 71 is slidably set in a different limit groove 23, and each connecting rod 72 is slidably set in a different connecting hole 24. The diameter of the limit block 71 is larger than the aperture of the connecting hole 24. The return spring 73 is sleeved on the connecting rod 72. The return spring 73 expands and contracts along the sliding direction of the limit block 71. The two ends of the return spring 73 respectively contact the end surface of the limit block 71 near the bottom of the limit groove 23 and the bottom of the limit groove 23. When the return spring 73 is in a natural state, the outer protrusion 421 contacts the upper mold core 4.

[0073] Reference Figure 9 The pressure holding groove 31 has a plurality of mounting grooves 311 formed on its wall. The extending direction of the mounting grooves 311 is perpendicular to the mold opening direction. A stopper assembly 8 is provided in each mounting groove 311 to prevent the outer protrusion 421 from separating from the lower mold core 3.

[0074] Reference Figure 9 The stop assembly 8 includes a stop block 81 and a stop spring 82. The stop block 81 is slidably arranged in the mounting groove 311, and the stop spring 82 extends and retracts along the sliding direction of the stop block 81. The two ends of the stop spring 82 are respectively fixed to the end surface of the stop block 81 close to the bottom of the mounting groove 311 and the bottom of the mounting groove 311. The end of the stop block 81 away from the stop spring 82 is provided with a movable inclined surface 811, and the movable inclined surface 811 faces the upper mold core 4. When the stop spring 82 is in a natural state, the end of the stop block 81 extends out of the mounting groove 311. A stop groove 4212 is provided on the end surface of the outer protrusion 421 away from the inner protrusion 422 corresponding to the mounting groove 311. The stop groove 4212 is used for inserting the end of the stop block 81. When the mold is closed, the stop groove 4212 is aligned with the corresponding mounting groove 311.

[0075] Reference Figure 9The movable mold 1 is provided with a plurality of reset holes 11 extending into the lower mold core 3. The number of reset holes 11 is the same, and each reset hole 11 is connected to a different mounting groove 311. A reset groove 812 is provided on the end surface of the stop block 81 near the reset hole 11. A reset inclined surface 813 is provided between the groove wall of the reset groove 812 near the bottom of the mounting groove 311 and the end surface of the stop block 81 near the reset hole 11. A reset rod 54 is slidably provided in each reset hole 11, and the reset rod 54 is fixed to the push plate ( Figure 9 (not shown). The reset groove 812 is used to insert the end of the reset rod 54, and the reset slope 813 is designed to abut against the end of the reset rod 54. When the mold is closed, there is a gap between the reset rod 54 and the installation groove 311. When the retaining spring 82 is in its neutral position, the reset slope 813 is aligned with the reset hole 11. When the end of the reset rod 54 is inserted into the reset groove 812, the stop block 81 is completely located in the installation groove 311.

[0076] The operating principle of Example 2 is as follows: During mold closing, the disengagement block 4231 presses against the wall of the pressure-retaining groove 31, allowing its end to retract into the disengagement groove 4221. Simultaneously, the outer protrusion 421 presses against the movable inclined surface 811, forcing the stop block 81 into the mounting groove 311 until the stop groove 4212 is aligned with the mounting groove 311. Under the action of the stop spring 82, the end of the stop block 81 is inserted into the stop groove 4212. After injection molding is completed, an annular waste material is formed between the pressure-retaining protrusion 42 and the wall of the pressure-retaining groove 31, and a hook-shaped waste material is formed in the hook groove 4211. During mold opening, the inner protrusion 422 moves relative to the outer protrusion 421, and the disengagement block 4231 is reset under the action of the disengagement spring 4232. During demoulding, the push plate 51 moves to drive the push rod 52 to move. After the circuit breaker base moves out of the lower cavity 32, the push plate 51 drives the reset rod 54 to press against the reset inclined surface 813 and insert into the reset groove 812. At this time, the stop block 81 moves into the installation groove 311. Under the action of the reset spring 73, the outer protrusion 421 is reset and drives the annular waste to move out of the lower cavity 32 through the hook-shaped waste. The annular waste hits the disengagement block 4231 to separate the annular waste from the hook-shaped waste or the hook-shaped waste directly falls out of the hook groove 4211.

[0077] This arrangement eliminates the need for workers to manually cut the annular waste, further improving the processing efficiency of the circuit breaker base.

[0078] This application also discloses a process. The process comprises the following steps:

[0079] S1: mold closing 70%-95%;

[0080] S2: Inject 70%-90% of the raw materials into the mold at least three times, and after each injection, completely close the mold and open it to the mold closing ratio in S1 for deflation. The deflation time is 10-25 seconds.

[0081] S3: Inject the remaining raw material and maintain pressure to cure for 40-60 seconds.

[0082] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An injection mold for a circuit breaker base, comprising a movable mold (1) and a fixed mold (2), wherein the movable mold (1) is provided with a lower mold core (3), and the fixed mold (2) is provided with an upper mold core (4), wherein the upper mold core (4) and the lower mold core (3) enclose a cavity for molding the circuit breaker base, and the fixed mold (2) is provided with a main flow channel (21), characterized in that: The movable mold (1) is provided with a material pushing component (5) and a material folding component (6); The pusher assembly (5) comprises a pusher plate (51) slidably arranged on the movable mold (1) and a plurality of pusher rods (52) connected to the pusher plate (51), wherein the pusher rods (52) penetrate and are slidably arranged on the lower mold core (3); The folding assembly (6) includes a folding plate (61) slidably arranged on the movable mold (1) and a folding block (62) connected to the folding plate (61), the folding plate (61) is located on the side of the push plate (51) away from the lower mold core (3), the folding block (62) penetrates and is slidably arranged on the push plate (51) and the lower mold core (3), and the folding block (62), the upper mold core (4) and the lower mold core (3) enclose a branch channel (22) that is connected to the main channel (21) and the cavity; The mold cavity comprises an upper cavity (41) provided on the upper mold core (4) and a lower cavity (32) provided on the lower mold core (3); the lower mold core (3) is provided with a lower cavity (32) connected to a pressure-holding groove (31); the pressure-holding groove (31) is located outside the lower cavity (32); a pressure-holding protrusion (42) is provided on the upper mold core (4); the upper cavity (41) is located inside the pressure-holding protrusion (42); and the pressure-holding protrusion (42) is inserted into the pressure-holding groove (31); The pressure-maintaining protrusion (42) comprises an inner protrusion (422) fixed on the upper die core (4) and an outer protrusion (421) slidably arranged on the upper die core (4) along the die opening direction, wherein the outer protrusion (421) is sleeved on the inner protrusion (422), and a stop assembly (8) is provided on the lower die core (3) for limiting the separation of the outer protrusion (421) from the lower die core (3).

2. The injection mold for a circuit breaker base according to claim 1, characterized in that: A mounting groove (311) is provided on the groove wall of the pressure-maintaining groove (31), and the stop assembly (8) is provided in the mounting groove (311). The stop assembly (8) includes a stop block (81) and a stop spring (82), and the stop block (81) is slidably provided in the mounting groove (311). The stop spring (82) is connected to the stop block (81). When the stop spring (82) is in a natural state, the end of the stop block (81) extends out of the mounting groove (311), and the end of the stop block (81) that can extend out of the mounting groove (311) is provided with a movable inclined surface (811), and the movable inclined surface (811) faces the upper mold core (4), and a stop groove (4212) for inserting the end of the stop block (81) is provided on the end surface of the outer protrusion (421) away from the inner protrusion (422).

3. The injection mold for a circuit breaker base according to claim 1, characterized in that: A connecting assembly (7) is provided on the outer protrusion (421), and the connecting assembly (7) includes a limit block (71) and a connecting rod (72) with one end connected to the limit block (71), and the other end of the connecting rod (72) is connected to the outer protrusion (421). A limit groove (23) is provided on the end surface of the fixed mold (2) facing away from the movable mold (1), and the limit groove (23) extends into the upper mold core (4). A connecting hole (24) penetrating the upper mold core (4) is provided at the bottom of the limit groove (23). The limit block (71) is slidably set in the limit groove (23), and the connecting rod (72) is slidably set in the connecting hole (24). The cross-sectional width of the limit block (71) is greater than the aperture of the connecting hole (24).

4. The injection mold for a circuit breaker base according to claim 3, characterized in that: The connecting assembly (7) further includes a return spring (73), the two ends of which respectively contact the end surface of the limiting block (71) close to the bottom of the limiting groove (23) and the bottom of the limiting groove (23). When the return spring (73) is in a natural state, the outer protrusion (421) contacts the upper die core (4).

5. The injection mold for a circuit breaker base according to claim 2, characterized in that: The push plate (51) is connected to a reset rod (54), the movable mold (1) is provided with a reset hole (11) extending into the lower mold core (3), the reset hole (11) is connected to the mounting groove (311), the reset rod (54) is slidably arranged in the reset hole (11), the end surface of the stop block (81) close to the reset hole (11) is provided with a reset groove (812) for inserting the end of the reset rod (54), and a reset inclined surface (813) is provided between the groove wall of the reset groove (812) close to the bottom of the mounting groove (311) and the end surface of the stop block (81) close to the reset hole (11); When the stop spring (82) is in a natural state, the reset slope (813) is aligned with the reset hole (11); when the end of the reset rod (54) is inserted into the reset groove (812), the stop block (81) is completely located in the installation groove (311).

6. The injection mold for a circuit breaker base according to claim 4, characterized in that: A hook groove (4211) is provided on the end surface of the outer protrusion (421) facing the inner protrusion (422), and the hook groove (4211) is connected to the end surface of the outer protrusion (421) facing the lower mold core (3). The distance between the groove wall of the hook groove (4211) away from the inner protrusion (422) and the inner protrusion (422) decreases along the direction from the upper mold core (4) to the lower mold core (3). A disengagement groove (4221) is provided on the end surface of the inner protrusion (422) facing the lower mold core (3). A disengagement component (423) is provided in the disengagement groove (4221), and the disengagement component (423) includes a disengagement block (4231) slidably provided in the disengagement groove (4221) and a disengagement spring (4232) connected to the disengagement block (4231). When the disengagement spring (4232) is in a natural state, the end of the disengagement block (4231) extends out of the disengagement groove (4221).

7. A process, characterized in that: The application of the injection mold for the circuit breaker base according to claim 1 comprises the following steps: S1: mold closing 70%-95%; S2: Inject 70%-90% of the raw materials into the mold at least three times, and after each injection, completely close the mold and open it to the closing ratio in S1 for deflation; S3: Inject the remaining raw material and maintain pressure to cure for 40-60 seconds.

8. A process according to claim 7, characterized in that: The deflation time in S2 is 10-25 seconds.

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