Pressure-injection mold for circuit breaker base and pressure-injection process of pressure-injection mold

Abstract

The invention discloses a pressure-injection mold for a circuit breaker base and a pressure-injection process of the pressure-injection mold, relates to the technical field of pressure-injection of circuit breaker bases, and aims to solve the technical problem that the pressure-injection mold for the circuit breaker base lacks an automatic material returning means. The pressure-injection mold comprises a lower mold, an upper mold is arranged at the top of the lower mold, and a pressure-injection mechanism is fixedly arranged at the bottom of the upper mold; the pressure injection mechanism comprises four limiting rods, a pouring unit and a material returning unit. By arranging the pressure injection mechanism, when the upper mold and the lower mold are closed, a sealed space is formed through a mold plate and a pouring hole, pouring can be carried out, when the upper mold moves upwards, a circuit breaker base can be moved out of the lower mold, meanwhile, the effects of automatic material returning and the like are achieved through a pneumatic system, heat dissipation can be carried out on the pressure injection circuit breaker base through water flow in the lower mold, and the service life of the circuit breaker base is prolonged. And the forming time of the circuit breaker base is shortened, the inner wall of the pouring hole is scraped and cleaned through the scraping groove by moving the plate in the pouring hole, the surface of the pouring hole is kept smooth, and forming of the circuit breaker base is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breaker base injection molding, and more particularly to an injection molding mold for a circuit breaker base and an injection molding process thereof. Background Art

[0002] The injection mold of the circuit breaker base plays a vital role in the production and manufacturing of circuit breakers. Its performance is directly related to the quality of the base, which in turn affects the overall performance and safety of the circuit breaker. The new circuit breaker base injection mold has greatly improved production efficiency and product quality, reduced production costs, and brought more efficient and higher-quality solutions to the production of circuit breaker bases, which has strongly promoted the development of the circuit breaker production industry.

[0003] At present, the injection mold of the circuit breaker base lacks an automated material return method and often relies on manual separation of runner waste and products, which is inefficient, has high labor costs, and is easy to damage the injection molded product during operation. In view of this, we propose an injection mold and an injection molding process for the circuit breaker base. Summary of the invention

[0004] The object of the present invention is to provide an injection mold for a circuit breaker base, so as to solve the technical problem that the injection mold for the circuit breaker base lacks an automated material return means.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an injection mold for a circuit breaker base, comprising a lower mold, an upper mold is arranged on the top of the lower mold, and an injection mechanism is fixedly arranged on the bottom of the upper mold; The injection mechanism includes four limit rods, a pouring unit and a material withdrawal unit; the four limit rods are symmetrically fixedly connected to the bottom of the upper mold, and the limit rods are inserted into the upper holes of the lower mold, the pouring unit is arranged at the top of the lower mold, and the material withdrawal unit is arranged at the bottom of the upper mold; The bottoms of the four limit rods are fixedly connected with a cross plate, the top of the cross plate is fixedly connected with a template through a first plug rod, the top of the upper mold is fixedly connected with a connection port, the bottom of the upper mold is fixedly connected with a sealing plate, and the sealing plate is in movably contact with the lower mold, a casting hole is arranged on the top of the lower mold, and the template is movably sleeved inside the casting hole. The present invention provides a pressing mechanism, and when the upper mold and the lower mold are closed, a sealed space is formed by the template and the casting hole, and casting can be carried out. When the upper mold moves upward, the circuit breaker base can be moved out from the lower mold. At the same time, the pneumatic system can realize the effects of automatic material return, and the water flow inside the lower mold can dissipate the heat of the pressed circuit breaker base, thereby reducing the molding time of the circuit breaker base. The plate moves inside the casting hole, and the inner wall of the casting hole is scraped and cleaned by the scraper groove, so that the surface remains smooth, which is conducive to the molding of the circuit breaker base.

[0006] Preferably, a plurality of scraping grooves are arranged in a linear array on the side surface of the template, and a plurality of air leakage ports are arranged in a square array on the bottom of the template.

[0007] Preferably, the pouring unit includes a pouring pipe, which is inserted into the upper hole of the lower mold and connected to the pouring hole. A closed-loop groove is arranged on the top of the lower mold, and an oil pipe is fixedly sleeved in another hole of the mold, and the oil pipe is connected to the closed-loop groove.

[0008] Preferably, the inner wall of the casting hole is provided with a plurality of through holes in a square array, and the through holes are connected to the closed-loop groove, and a ball is movably sleeved inside each of the through holes, and the ball is in movably contact with the template.

[0009] Preferably, the material return unit includes a material return rod, which is movably connected to the bottom of the upper mold. The bottom of the upper mold is symmetrically structured and has two sliding grooves. Pneumatic sliders are slidably connected inside the two sliding grooves respectively. The two pneumatic sliders are fixedly connected to two first telescopic rods near one side of the material return rod.

[0010] Preferably, a spring is movably sleeved on the side surfaces of the two first telescopic rods, the two first telescopic rods are movably connected to the opposite ends of the material return rod through hinge frames, and two limit blocks are slidably connected inside the two slide grooves.

[0011] Preferably, two tension springs are fixedly connected to the bottom of the two limit blocks, and the tension springs are fixedly connected to the hinged frame. The end surface of the material removal rod is symmetrically structured and fixedly connected to a material removal plate. The sealing plate is symmetrically structured and has two notches, which are matched with the material removal plate.

[0012] A compression molding process for a circuit breaker base compression molding mold comprises the following steps: S1. Mold preparation: Before use, it is necessary to check the various parts of the injection mold to see if there is wear, deformation, damage, etc., and use a special cleaner to remove dust, oil and other impurities on the mold surface to ensure that the mold surface is smooth. Then install the mold on the injection molding machine, and connect it to the output end of the injection molding machine through the connection port; S2, circuit breaker base injection molding; S2.1. Raw material preparation: Place the injection material to be used in a melting device for melting, and inject clean water into the lower mold to cool the circuit breaker base, and then connect the oil pipeline to the lubrication system containing lubricating oil on the injection machine for demoulding the circuit breaker base; S2.2, Injection molding of circuit breaker base: through the external control system, the upper mold is moved downward through the limit rod. At this time, the sealing plate fits with the lower mold, and the casting hole is sealed through the template. Then, through the external control system, the fluid material flows from the casting pipe into the sealed space to form the circuit breaker base. The clean water in the lower mold flows into the template through the air leakage port to dissipate heat on the template and shorten the cooling time of the circuit breaker base. At the same time, when the circuit breaker base is continuously injected, the impurities on the inner wall of the casting hole can be scraped off through the scraping groove on the template to keep it smooth and avoid affecting the integrity of the injection molding of the circuit breaker base; S2.3, circuit breaker base molding and material removal: the upper mold is moved upward through the external hydraulic system, and the template is moved upward through the limit rod to be flush with the top surface of the lower mold, and the circuit breaker base is moved out of the casting hole. At this time, the pneumatic slider is moved in the slide groove through the external control system. The movement of the pneumatic slider pushes the first telescopic rod, and the traction of the tension spring causes the material removal rod to rotate at an angle. As the pneumatic slider continues to move and the spring applies force to the first telescopic rod, the material removal rod continues to tilt, and the material removal plate moves out of the slot to push the circuit breaker base out, thereby achieving an automatic material removal effect.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a pressing mechanism. When the upper mold and the lower mold are closed, a sealed space is formed by the template and the casting hole, and casting can be performed. When the upper mold moves upward, the circuit breaker base can be moved out from the lower mold. At the same time, the pneumatic system is used to realize the effects of automatic material return, and the water flow inside the lower mold can dissipate the heat of the pressed circuit breaker base, thereby reducing the molding time of the circuit breaker base. The plate moves inside the casting hole, and the inner wall of the casting hole is scraped and cleaned by the scraping groove, so that the surface of the circuit breaker base remains smooth and clean, which is beneficial to the molding of the circuit breaker base. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional partial structure of the casting unit of the present invention; Figure 4 It is a schematic diagram of a three-dimensional partial structure of a casting unit of the present invention, to illustrate the three-dimensional structure of a closed-loop groove; Figure 5 It is a schematic diagram of the three-dimensional structure of the injection molding mechanism of the present invention; Figure 6 It is a schematic diagram of the three-dimensional partial structure of the material withdrawal unit of the present invention; Figure 7 It is a three-dimensional enlarged structural schematic diagram of the material withdrawal unit of the present invention.

[0015] Explanation of the numbers in the figure: 1. lower mold; 2. upper mold; 3. injection mechanism; 301. limit rod; 302. cross plate; 303. template; 303a. scraper groove; 303b. air leakage port; 304. connecting port; 305. sealing plate; 306. casting hole; 4. casting unit; 401. casting pipe; 402. closed-loop groove; 403. oil pipeline; 404. through hole; 405. ball; 5. material withdrawal unit; 501. material withdrawal rod; 502. slide groove; 503. pneumatic slider; 504. first telescopic rod; 505. spring; 506. hinged frame; 507. limit block; 508. tension spring; 509. material withdrawal plate; 510. notch. DETAILED DESCRIPTION

[0016] like Figures 1 to 7 As shown, the present invention relates to an injection mold for a circuit breaker base, comprising a lower mold 1, an upper mold 2 is arranged on the top of the lower mold 1, and an injection mechanism 3 is fixedly arranged at the bottom of the upper mold 2; The injection mechanism 3 includes four limit rods 301, a pouring unit 4 and a material withdrawal unit 5; the four limit rods 301 are symmetrically fixedly connected to the bottom of the upper mold 2, and the limit rods 301 are inserted into the upper holes of the lower mold 1, the pouring unit 4 is arranged at the top of the lower mold 1, and the material withdrawal unit 5 is arranged at the bottom of the upper mold 2; The bottom of the four limit rods 301 is fixedly connected to a cross plate 302, the top of the cross plate 302 is fixedly connected to a template 303 through a first plug rod, the top of the upper mold 2 is fixedly connected to a connection port 304, the bottom of the upper mold 2 is fixedly connected to a sealing plate 305, and the sealing plate 305 is in active contact with the lower mold 1, a pouring hole 306 is arranged on the top of the lower mold 1, and the template 303 is movably sleeved inside the pouring hole 306, a plurality of scraping grooves 303a are arranged in a linear array on the side surface of the template 303, and a plurality of air leakage ports 303b are arranged in a square array on the bottom of the template 303. The injection mechanism 3 is arranged. When the upper mold 2 and the lower mold 1 are closed, a sealed space is formed by the template 303 and the casting hole 306, and casting can be performed. When the upper mold 2 moves upward, the circuit breaker base can be moved out from the lower mold 1. At the same time, the pneumatic system is used to realize the effects of automatic material withdrawal, and the water flow inside the lower mold 1 can dissipate the heat of the injection-molded circuit breaker base, thereby reducing the molding time of the circuit breaker base. The plate 303 moves inside the casting hole 306, and the scraping groove 303a is used to scrape and clean the inner wall of the casting hole 306, so that its surface remains smooth, which is conducive to the molding of the circuit breaker base.

[0017] In an embodiment of the present invention, the pouring unit 4 includes a pouring pipe 401, which is inserted into the upper hole of the lower mold 1 and is connected to the pouring hole 306. A closed-loop groove 402 is arranged on the top of the lower mold 1, and an oil pipe 403 is fixedly sleeved in another hole of the mold 1, and the oil pipe 403 is connected to the closed-loop groove 402. The inner wall of the pouring hole 306 is provided with a plurality of through holes 404 in a square array, and the through holes 404 are connected to the closed-loop groove 402. A rolling ball 405 is movably sleeved inside each through hole 404, and the rolling ball 405 is in movably contact with the template 303.

[0018] In an embodiment of the present invention, the material return unit 5 includes a material return rod 501, which is movably connected to the bottom of the upper mold 2. The bottom of the upper mold 2 is symmetrically structured and has two slide grooves 502. Pneumatic sliders 503 are slidably connected inside the two slide grooves 502 respectively. Two first telescopic rods 504 are fixedly connected to the side of the two pneumatic sliders 503 close to the material return rod 501. Springs 505 are movably sleeved on the side surfaces of the two first telescopic rods 504. The two first telescopic rods 504 are movably connected to the opposite ends of the material return rod 501 through a hinge frame 506 respectively. Two limit blocks 507 are slidably connected inside the two slide grooves 502. Two tension springs 508 are fixedly connected to the bottom of the two limit blocks 507, and the tension spring 508 is fixedly connected to the hinge frame 506. The end surface of the material return rod 501 is symmetrically structured and fixedly connected with a material return plate 509. The sealing plate 305 is symmetrically structured and has two notches 510, which are arranged, and the notches 510 are adapted to the material return plate 509.

[0019] Embodiment 2: A pressure injection process for a pressure injection mold for a circuit breaker base, comprising the following steps: S1. Mold preparation: Before use, it is necessary to check various parts of the injection mold to see if there is wear, deformation, damage, etc., and use a special cleaning agent to remove dust, oil and other impurities on the mold surface to ensure that the mold surface is smooth. Then, the mold is installed on the injection molding machine, and connected to the output end of the injection molding machine through the connection port 304; S2, circuit breaker base injection molding; S2.1, raw material preparation: place the injection material to be used in a melting device for melting, and inject clean water into the lower mold 1 to cool the circuit breaker base, and then connect the oil pipe 403 to the lubrication system containing lubricating oil on the injection molding machine for demoulding the circuit breaker base; S2.2, injection molding of circuit breaker base: through the external control system, the upper mold 2 is moved downward through the limit rod 301. At this time, the sealing plate 305 is fitted with the lower mold 1, and the casting hole 306 is made into a sealed space through the template 303. Then, through the external control system, the fluid material is made to flow from the casting pipe 401 into the sealed space to form the circuit breaker base. The clean water in the lower mold 1 flows into the template 303 through the air leakage port 303b to dissipate heat for the template 303, thereby shortening the cooling time of the circuit breaker base. At the same time, when the circuit breaker base is continuously injected, the impurities on the inner wall of the casting hole 306 can be scraped off through the scraping groove 303a on the template 303, so that it always maintains a smooth effect and avoids affecting the integrity of the injection molding of the circuit breaker base; S2.3, circuit breaker base molding and material removal: the upper mold 2 is moved upward through the external hydraulic system, and the template 303 is moved upward through the limit rod 301 to be flush with the top surface of the lower mold 1, and the circuit breaker base is moved out of the casting hole 306. At this time, the pneumatic slider 503 is moved in the slide groove 502 through the external control system. The movement of the pneumatic slider 503 pushes the first telescopic rod 504, and the traction of the tension spring 508 causes the material removal rod 501 to rotate at an angle. As the pneumatic slider 503 continues to move and the spring 505 applies a force to the first telescopic rod 504, the material removal rod 501 continues to tilt, and the material removal plate 509 moves out of the slot 510 to push the circuit breaker base out, thereby achieving an automatic material removal effect.

[0020] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An injection mold for a circuit breaker base, characterized in that: It comprises a lower mold (1), an upper mold (2) is arranged on the top of the lower mold (1), and an injection molding mechanism (3) is fixedly arranged on the bottom of the upper mold (2); The injection mechanism (3) comprises four limit rods (301), a pouring unit (4) and a material withdrawal unit (5); the four limit rods (301) are symmetrically structured and fixedly connected to the bottom of the upper mold (2), and the limit rods (301) are inserted into the upper holes of the lower mold (1), the pouring unit (4) is arranged at the top of the lower mold (1), and the material withdrawal unit (5) is arranged at the bottom of the upper mold (2); The bottoms of the four limit rods (301) are fixedly connected to a cross plate (302), the tops of the cross plates (302) are fixedly connected to a template (303) via a first plug rod, the top of the upper mold (2) is fixedly connected to a connection port (304), the bottom of the upper mold (2) is fixedly connected to a sealing plate (305), and the sealing plate (305) is in movably contact with the lower mold (1), a casting hole (306) is arranged at the top of the lower mold (1), and the template (303) is movably sleeved inside the casting hole (306).

2. The injection mold for a circuit breaker base according to claim 1, characterized in that: A plurality of scraping grooves (303a) are arranged in a linear array on the side surface of the template (303), and a plurality of air leakage ports (303b) are arranged in a square array on the bottom of the template (303).

3. The injection mold for a circuit breaker base according to claim 2, characterized in that: The pouring unit (4) comprises a pouring pipe (401), the pouring pipe (401) is inserted into the upper hole of the lower mold (1), and the pouring pipe (401) is connected to the pouring hole (306), a closed-loop groove (402) is arranged on the top of the lower mold (1), and an oil delivery pipe (403) is fixedly sleeved in another hole of the mold (1), and the oil delivery pipe (403) is connected to the closed-loop groove (402).

4. The injection mold for a circuit breaker base according to claim 3, characterized in that: The inner wall of the casting hole (306) is provided with a plurality of through holes (404) in a square array, and the through holes (404) are connected to the closed-loop groove (402). A rolling ball (405) is movably sleeved inside each of the through holes (404), and the rolling ball (405) is in movably contact with the template (303).

5. The injection mold for a circuit breaker base according to claim 4, characterized in that: The material return unit (5) comprises a material return rod (501), wherein the material return rod (501) is movably connected to the bottom of the upper mold (2), and the bottom of the upper mold (2) is symmetrically structured with two slide grooves (502), and the insides of the two slide grooves (502) are respectively slidably connected with pneumatic sliders (503), and the two pneumatic sliders (503) are fixedly connected to two first telescopic rods (504) on one side close to the material return rod (501).

6. The injection mold for a circuit breaker base according to claim 5, characterized in that: The side surfaces of the two first telescopic rods (504) are movably sleeved with springs (505); the two first telescopic rods (504) are movably connected to the opposite ends of the material return rod (501) through hinge frames (506); and two limit blocks (507) are slidably connected inside the two slide grooves (502).

7. The injection mold for a circuit breaker base according to claim 6, characterized in that: Two tension springs (508) are fixedly connected to the bottom of the two limit blocks (507), and the tension springs (508) are fixedly connected to the hinge frame (506); the end surface of the material removal rod (501) is symmetrically structured and fixedly connected to a material removal plate (509); the sealing plate (305) is symmetrically structured and has two notches (510), and the notches (510) are adapted to the material removal plate (509).

8. An injection molding process for an injection molding die for a circuit breaker base, which is applicable to the injection molding die for a circuit breaker base according to claim 7, characterized in that: The following steps are involved: S1. Mold preparation: Before use, it is necessary to check the various parts of the injection mold to see if there is wear, deformation, damage, etc., and use a special cleaning agent to remove dust, oil stains and other impurities on the surface of the mold to ensure that the mold surface is smooth. Then, the mold is installed on the injection molding machine, and connected to the output end of the injection molding machine through the connection port (304); S2, circuit breaker base injection molding; S2.1, raw material preparation: placing the injection material to be used in a melting device for melting, and injecting clean water into the lower mold (1) to cool the circuit breaker base, and then connecting the oil pipe (403) to the lubrication system containing lubricating oil on the injection molding machine for demoulding the circuit breaker base; S2.2, injection molding of the circuit breaker base: through an external control system, the upper mold (2) is moved downward through the limit rod (301), at which time, the sealing plate (305) is fitted with the lower mold (1), and the casting hole (306) is made into a sealed space through the template (303), and then, through the external control system, the fluid material is made to flow from the casting pipe (401) into the sealed space to form the circuit breaker base, and the clean water in the lower mold (1) flows into the template (303) through the air leakage port (303b), so as to dissipate heat for the template (303) and shorten the cooling time of the circuit breaker base. At the same time, when the circuit breaker base is continuously injected, impurities on the inner wall of the casting hole (306) can be scraped off through the scraping groove (303a) on the template (303), so that the casting hole (306) is always kept smooth and clean, thereby avoiding affecting the integrity of the injection molding of the circuit breaker base; S2.3, circuit breaker base molding and material removal: the upper mold (2) is moved upward by an external hydraulic system, and the template (303) is moved upward by a limit rod (301) to be flush with the top surface of the lower mold (1), and the circuit breaker base is moved out of the casting hole (306). At this time, the pneumatic slider (503) is moved in the slide groove (502) by an external control system. The movement of the pneumatic slider (503) pushes the first telescopic rod (504), and the material removal rod (501) is rotated by an angle through the traction of the tension spring (508). As the pneumatic slider (503) continues to move and the spring (505) applies a force to the first telescopic rod (504), the material removal rod (501) continues to tilt, and the material removal plate (509) is moved out of the notch (510), and the circuit breaker base is pushed out, thereby achieving an automatic material removal effect.

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