A feed device and method for a circuit breaker housing injection molding machine

Abstract

The application relates to the technical field of injection molding and discloses a feeding device and method of a circuit breaker shell injection molding machine, which comprises a feeding hopper connected with the injection molding machine, a mixed dehumidification assembly is connected with a feeding end of the feeding hopper through a pipeline, a feeding pipe is arranged at the feeding end of the mixed dehumidification assembly, at least two feeding ends are arranged on the feeding pipe, and two feeding ends are respectively connected with storage assembly one and storage assembly two. The air is dried in the mode of the dehumidification film, the dehumidification process continuously proceeds, there is no corrosion problem, no valve switching is needed, there is no moving part, the system has high reliability, is easy to maintain, has small energy consumption, has low maintenance cost and the like, meanwhile, dry gas generated by the device drives the material to be transported, so that the material can be fed and dehumidified at the same time, in addition, the mixed dehumidification assembly can further improve the dryness of the mixture by mixing the plastic particles and the additive materials at the same time.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, specifically to a feeding device and method for an injection molding machine for circuit breaker housings. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. The boundary between high and low voltage is somewhat blurred; generally, those above 3kV are referred to as high-voltage electrical appliances. The circuit breaker casing is made of insulating plastic and is molded using injection molding.

[0003] In existing technologies, circuit breaker housings are generally injection molded using PA66 engineering plastics and other additives, with glass fiber being the main additive. PA66 engineering plastics and other materials such as glass fiber have strong water absorption. Therefore, dehumidification of the materials is required during the injection molding process. Currently, the feed of the injection molding machine needs to be dehumidified in advance, resulting in low feeding efficiency. At the same time, the dehumidification method uses a honeycomb rotor, which is relatively power-consuming and has a large size, making it unfavorable for energy conservation, environmental protection, and small-scale implementation. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a feeding device and method for a circuit breaker housing injection molding machine. It features simultaneous feeding and dehumidification, a small dehumidification equipment footprint, and energy saving and emission reduction. This solves the problem that the feeding of injection molding machines requires pre-dehumidification, resulting in low feeding efficiency. Furthermore, the dehumidification method using a honeycomb rotor is relatively power-intensive and bulky, which is not conducive to energy saving, environmental protection, and small-scale implementation.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a feeding device for a circuit breaker housing injection molding machine, comprising a feeding hopper connected to the injection molding machine, wherein the feeding end of the feeding hopper is connected to a mixing and dehumidifying component via a pipe, the feeding end of the mixing and dehumidifying component is provided with a feeding pipe, the feeding pipe is provided with at least two feeding ends, the two feeding ends are respectively connected to a material storage component one and a material storage component two, the air inlet end of the feeding pipe is connected to a heating component via a one-way air valve, and the air inlet end of the heating component is connected to a drying component.

[0008] Preferably, the mixing dehumidification assembly includes a mixing chamber, an exhaust hood is fixedly connected to the top of the mixing chamber, the exhaust hood is in communication with the mixing chamber, a lower baffle and an upper baffle are respectively provided at the upper and lower ends of the exhaust hood, a bearing seat is provided at the top of the exhaust hood, a rotating shaft is rotatably connected to the bearing seat, the rotating shaft passes through the interior of the exhaust hood and the mixing chamber, a fan blade is fixedly connected to the outer side wall of the rotating shaft inside the exhaust hood, and a mixing blade is fixedly connected to the outer side wall of the rotating shaft inside the mixing chamber.

[0009] By adopting the above scheme, when plastic granules and additives enter the mixing chamber, the airflow and the mixture drive the mixing blades to rotate, causing the mixing blades to drive the rotating shaft to rotate. This allows the mixing blades to stir the mixture, enabling it to enter the lower part of the chamber more evenly. At the same time, the rotating shaft drives the fan blades in the exhaust hood to rotate, causing the fan blades to push the hot and humid gas from the lower part of the chamber outward. This allows the mixing and dehumidification component to further improve the dryness of the mixture while mixing plastic granules and additives.

[0010] Preferably, both the first and second storage components are provided with air inlets at their tops, and the first and second storage components are connected to the drying component via pipes and three-way valves.

[0011] By adopting the above scheme, the drying component divides the drying gas into two parts. One part is connected to the feed pipe, and the other part is connected to the air inlet of storage component one and storage component two through a three-way valve, so that the drying gas can dry the objects stored in multiple storage tanks at the same time, further improving the dryness of the materials.

[0012] Preferably, the storage component one and the storage component two have the same specifications and structure. Both the storage component one and the storage component two include a storage bucket. A discharge pipe is fixedly connected to the bottom of the storage bucket. A support base is fixedly connected to one side of the discharge pipe. An electric push rod is installed on one side of the support base. A stop block is fixedly connected to the telescopic end of the electric push rod.

[0013] By adopting the above solution, the storage hopper can be sealed to store plastic granules or additives, preventing external moisture from entering and contaminating the materials. At the same time, the discharge pipe, support base, electric push rod and stop block form a mechanism that can adjust the discharge rate. The distance between the internal stop block and the discharge pipe can be adjusted according to the discharge rate. The more material needs to be discharged, the greater the distance between the stop block and the discharge pipe, and vice versa.

[0014] Preferably, the heating assembly includes a heating chamber, the interior of which is provided with a corrugated paper-shaped heating plate.

[0015] By adopting the above scheme, the heating plate can be made of graphene material. Graphene material does not react with gases in the air, improving the cleanliness of the pumped air. Furthermore, the corrugated paper-like heating plate can increase the contact area with the air, thereby improving the heating efficiency of the heating plate.

[0016] Preferably, the drying assembly includes a dehumidifying membrane assembly, a vacuum pump, and a cold trap. The dehumidifying membrane assembly has three ports: an air inlet, a dehumidifying end, and a drying end. The dehumidifying end of the dehumidifying membrane assembly is connected to one end of the vacuum pump via a pipe, and the other end of the vacuum pump is connected to the cold trap.

[0017] By adopting the above scheme, hollow fiber membranes are used in the dehumidification membrane group. Under the action of a vacuum pump, water vapor in the air is separated from dry gas, so that water vapor is condensed in a cold trap and dry gas is discharged from the drying end.

[0018] Preferably, the drying end of the dehumidifying membrane assembly is connected to a purification pipe via a pipeline. The purification pipe includes a pipe body, and water-absorbing resin and activated carbon are fixedly connected inside the pipe body.

[0019] By adopting the above scheme, water-absorbing resin and activated carbon are used to purify the pretreated dry gas, further improving the dryness and cleanliness of the gas.

[0020] A feeding method for a circuit breaker housing injection molding machine includes the following steps:

[0021] S1: Place the plastic granules and additives into storage components one and two, respectively, and seal them for storage.

[0022] S2: Adjust the discharge rate of storage component one and storage component two according to the ratio of plastic granules and additives respectively;

[0023] S3: Use a drying component to dry the air;

[0024] S4: Heat the dry air and deliver it into the feed pipe to form a dry airflow;

[0025] S5: Plastic granules and additives enter the mixing and dehumidifying component through the feed pipe under the action of the drying airflow;

[0026] S6: Use a mixing and dehumidification assembly to mix plastic granules and additives and separate them into dry and wet materials;

[0027] S7: The dried mixture enters the feed hopper to complete the feeding process.

[0028] (III) Beneficial Effects

[0029] Compared with the prior art, the present invention provides a feeding device and method for a circuit breaker housing injection molding machine, which has the following beneficial effects:

[0030] The method of drying air using a dehumidifying membrane has the advantages of continuous dehumidification, no corrosion problems, no need for valve switching, no moving parts, high system reliability, easy maintenance, low energy consumption, and low maintenance costs. At the same time, the generated dry gas drives the material to be conveyed, allowing the material to be fed and dehumidified simultaneously. In addition, by setting up a mixing dehumidification component, the dryness of the mixture can be further improved while mixing plastic granules and additives. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the hybrid dehumidification component in this invention;

[0033] Figure 3 This is a schematic diagram of the material storage component in this invention;

[0034] Figure 4 This is a schematic diagram of the heating component in this invention;

[0035] Figure 5 This is a schematic diagram of the purification tube in this invention.

[0036] In the diagram: 10. Feed hopper;

[0037] 20. Mixing dehumidification component; 21. Mixing chamber; 22. Exhaust hood; 23. Lower baffle; 24. Upper baffle; 25. Bearing housing; 26. Rotating shaft; 27. Fan blade; 28. Mixing blade;

[0038] 30. Feed pipe;

[0039] 40. Storage assembly 1; 41. Storage hopper; 42. Discharge pipe; 43. Support base; 44. Electric push rod; 45. Stop block;

[0040] 50. Storage Component Two;

[0041] 60. One-way air valve;

[0042] 70. Heating assembly; 71. Heating chamber; 72. Heating plate;

[0043] 80. Drying assembly; 81. Dehumidifying membrane assembly; 82. Vacuum pump; 83. Cold trap;

[0044] 90. Purification tube; 91. Tube body; 92. Water-absorbing resin; 93. Activated carbon. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1

[0047] A feeding device for a circuit breaker housing injection molding machine includes a feeding hopper 10 connected to the injection molding machine. The feeding end of the feeding hopper 10 is connected to a mixing and dehumidifying assembly 20 via a pipe. The mixing and dehumidifying assembly 20 includes a mixing chamber 21. An exhaust hood 22 is fixedly connected to the top of the mixing chamber 21 and communicates with the mixing chamber 21. A lower baffle 23 and an upper baffle 24 are respectively provided at the upper and lower ends of the exhaust hood 22. A bearing seat 25 is provided on the top of the exhaust hood 22, and a rotating shaft 26 is rotatably connected to the bearing seat 25. A rotating shaft 26 penetrates the interior of the exhaust hood 22 and the mixing chamber 21. A fan blade 27 is fixedly connected to the outer wall of the rotating shaft 26 inside the exhaust hood 22, and a mixing blade 28 is fixedly connected to the outer wall of the rotating shaft 26 inside the mixing chamber 21. The inlet end of the mixing dehumidification assembly 20 is provided with an inlet pipe 30, which has at least two inlet ends. The two inlet ends are respectively connected to a storage assembly 40 and a storage assembly 50. The storage assembly 40 and the storage assembly 50 have the same specifications and structure. Both 40 and storage assembly 2 50 include a storage hopper 41. A discharge pipe 42 is fixedly connected to the bottom of the storage hopper 41. A support base 43 is fixedly connected to one side of the discharge pipe 42. An electric push rod 44 is installed on one side of the support base 43. A stop block 45 is fixedly connected to the telescopic end of the electric push rod 44. The air inlet of the feed pipe 30 is connected to a heating assembly 70 via a one-way air valve 60. The heating assembly 70 includes a heating chamber 71. Inside the heating chamber 71 is a corrugated paper-shaped heating plate 72. The air inlet of the heating assembly 70... A drying assembly 80 is connected to the end of the device. The drying assembly 80 includes a dehumidifying membrane assembly 81, a vacuum pump 82, and a cold trap 83. The dehumidifying membrane assembly 81 has three ports: an air inlet, a dehumidifying end, and a drying end. The dehumidifying end of the dehumidifying membrane assembly 81 is connected to one end of the vacuum pump 82 through a pipe, and the other end of the vacuum pump 82 is connected to the cold trap 83. The drying end of the dehumidifying membrane assembly 81 is connected to a purification pipe 90 through a pipe. The purification pipe 90 includes a pipe body 91, and water-absorbing resin 92 and activated carbon 93 are fixedly connected inside the pipe body 91.

[0048] See Figure 1-5Before feeding, the plastic granules and additives are first sealed and stored in storage components 1 (40) and 2 (50) respectively. The discharge rates of storage components 1 (40) and 2 (50) are then adjusted according to the ratio of plastic granules to additives. During rate adjustment, the electric push rod 44 moves the stop block 45 to adjust the distance between the internal stop block 45 and the discharge pipe 42. The greater the amount of material to be discharged, the larger the distance between the stop block 45 and the discharge pipe 42, and vice versa. During material conveying, the drying component 80 dries the air. Under the action of the vacuum pump 82, the water vapor in the air is separated from the dry gas. The water vapor is condensed in the cold trap 83, and the dry gas is discharged from the drying end. The dried gas enters the heating chamber 71 through a pipeline. The heating plate 72 in the heating chamber 71 heats the gas. The heated dry gas is then discharged through the one-way valve 6. The material is conveyed to the feed pipe 30 to form a dry airflow. At this time, the plastic particles and additives in the storage components 1 40 and 2 50 fall into the feed pipe 30. Under the action of the dry airflow, the plastic particles and additives enter the mixing and dehumidifying component 20 through the feed pipe 30. When the plastic particles and additives enter the mixing chamber 21, the airflow and the mixture push the mixing blades 28 to rotate, which in turn drives the rotating shaft 26 to rotate. This allows the mixing blades 28 to stir the mixture, making it more evenly distributed below. At the same time, the rotating shaft 26 drives the fan blades 27 in the exhaust hood 22 to rotate, which pushes the hot and humid gas below to the outside. This allows the mixing and dehumidifying component 20 to further improve the dryness of the mixture while mixing the plastic particles and additives. Finally, the dried mixture enters the feed hopper 10, completing the feeding process.

[0049] Example 2

[0050] Based on Example 1, a dehumidification function for the storage section has been added.

[0051] Both storage assembly 40 and storage assembly 50 are equipped with air inlets at the top, and storage assembly 40 and storage assembly 50 are connected to drying assembly 80 through pipes and three-way valves.

[0052] See Figure 1 The drying component 80 divides the drying gas into two parts. One part is connected to the feed pipe 30, and the other part is connected to the air inlet of the storage component 1 40 and the storage component 2 50 through a three-way valve, so that the drying gas can dry the objects stored in multiple storage tanks 41 at the same time, further improving the dryness of the materials.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding device for a circuit breaker housing injection molding machine, comprising a feeding hopper (10) connected to the injection molding machine, characterized in that: The feeding end of the feeding hopper (10) is connected with a mixed dehumidification assembly (20) through a pipeline, the feeding end of the mixed dehumidification assembly (20) is provided with a feeding pipe (30), at least two feeding ends are arranged on the feeding pipe (30), the two feeding ends are respectively connected with a storage assembly one (40) and a storage assembly two (50), the air inlet end of the feeding pipe (30) is connected with a heating assembly (70) through a one-way air valve (60), the air inlet end of the heating assembly (70) is connected with a drying assembly (80), the mixed dehumidification assembly (20) comprises a mixing chamber (21), the top of the mixing chamber (21) is fixedly connected with an exhaust hood (22), the exhaust hood (22) and the mixing chamber (21) are in communication with each other, the upper and lower ends of the exhaust hood (22) are respectively provided with a lower baffle net (23) and an upper baffle net (24), the top of the exhaust hood (22) is provided with a bearing seat (25), the bearing seat (25) is rotatably connected with a rotating shaft (26), the rotating shaft (26) penetrates the inside of the exhaust hood (22) and the mixing chamber (21), the outer side wall of the rotating shaft (26) is fixedly connected with a fan blade (27) in the exhaust hood (22), and the outer side wall of the rotating shaft (26) is fixedly connected with a mixing blade (28) in the mixing chamber (21).

2. A feed arrangement for a circuit breaker housing injection molding machine as defined in claim 1, wherein: The top of the storage assembly one (40) and the storage assembly two (50) is provided with an air inlet, and the storage assembly one (40) and the storage assembly two (50) are connected with the drying assembly (80) through a pipeline and a three-way valve.

3. A feed arrangement for a circuit breaker housing injection molding machine as defined in claim 1, wherein: The specifications of the storage assembly one (40) and the storage assembly two (50) are consistent, and the storage assembly one (40) and the storage assembly two (50) both comprise a storage barrel (41), the bottom of the storage barrel (41) is fixedly connected with a discharge pipe (42), one side of the discharge pipe (42) is fixedly connected with a support seat (43), the support seat (43) is provided on one side with an electric push rod (44), and the telescopic end of the electric push rod (44) is fixedly connected with a stop block (45).

4. The feed apparatus for a circuit breaker housing injection molding machine of claim 1 wherein: The heating assembly (70) comprises a heating chamber (71), and the inside of the heating chamber (71) is provided with a heating plate (72) in the shape of corrugated paper.

5. The feed apparatus for a circuit breaker housing injection molding machine of claim 1 wherein: The drying assembly (80) comprises a dehumidification film group (81), a vacuum pump (82) and a cold trap (83), the dehumidification film group (81) has three ports, namely an air inlet end, a dehumidification end and a drying end, the dehumidification end of the dehumidification film group (81) is connected with one end of the vacuum pump (82) through a pipeline, and the other end of the vacuum pump (82) is connected with the cold trap (83).

6. A feed arrangement for a circuit breaker housing injection molding machine as defined in claim 5, wherein: The drying end of the dehumidification film group (81) is connected with a purification pipe (90) through a pipeline, and the purification pipe (90) comprises a pipe body (91), the inside of the pipe body (91) is fixedly connected with a water absorption resin (92) and an activated carbon (93).

7. A method of feeding a circuit breaker housing injection molding machine, the feeding device of a circuit breaker housing injection molding machine according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1: respectively storing the plastic particles and the additive materials in the storage assembly one (40) and the storage assembly two (50) in a sealed manner; S2: Adjust the discharging rate of the first storage assembly (40) and the second storage assembly (50) according to the proportion of the plastic particles and the additive materials respectively; S3: Dry the air by using the drying assembly (80); S4: Heat the dried air and send it into the feeding pipe (30) to form a drying air flow; S5: The plastic particles and the additive materials enter the mixing and dehumidifying assembly (20) from the feeding pipe (30) under the action of the drying air flow; S6: Mix and dry and wet separate the plastic particles and the additive materials by using the mixing and dehumidifying assembly (20); S7: The dried mixture enters the feeding hopper (10), and the feeding is completed.

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