Efficient injection molding device for thin-wall injection molded part of distributor shell

Abstract

The invention discloses an efficient injection molding device for a thin-wall injection molded part of a distributor shell, and belongs to the technical field of injection molding equipment, the efficient injection molding device comprises a fixing frame, a first mold and a second mold, and an air injection mechanism and a linkage mechanism are arranged at the top of the second mold; a plurality of first cooling flow channels are formed in the first mold, vertical shafts are rotationally mounted at the top ends of the first cooling flow channels, and rotating blades are fixedly connected to the bottom ends of the vertical shafts; the air injection mechanism comprises a compression box and a plurality of air injection pipes, and the top ends of the vertical shafts extend into the corresponding air injection pipes and are fixedly connected with spiral blades. Linear motion mechanical energy in the mold opening and closing process is converted into potential energy of compressed air to be stored, the potential energy is released in the cooling stage to drive stirring in the cooling system, and efficient recycling and utilization of waste energy in the production process are achieved.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment technology, and in particular to a high-efficiency injection molding device for thin-walled injection molded parts for power distribution housings. Background Technology

[0002] In modern industrial manufacturing, particularly in the production of electrical components such as power distribution housings, thin-walled plastic products are widely used due to their advantages such as lightweight and material savings. These products typically have extremely high requirements for production efficiency and molding quality. Currently, the mainstream production method for such thin-walled injection molded parts relies on conventional injection molding equipment and processes. The cooling process generally employs static cooling channels inside the mold, relying on the natural flow of the cooling medium within the channels or pump-driven advection to remove heat from the mold. However, due to the rapid heat dissipation, large specific surface area, and structural requirements for rapid filling and solidification of thin-walled parts, traditional cooling methods have become a key bottleneck restricting further reduction in production cycle time and consistency of quality.

[0003] Existing cooling solutions have several significant drawbacks. First, simply increasing the coolant flow rate and pressure to enhance heat exchange has its limitations. It significantly increases energy consumption and offers limited improvement in turbulence, leaving areas far from the flow channel center prone to heat buildup and uneven cooling. Second, some attempts at improvement, such as adding agitators to the coolant, typically require independent external drive systems like motors or hydraulic systems. This not only complicates the mold structure and increases manufacturing costs but also increases potential failure points and maintenance difficulties, while consuming substantial additional energy. Third, in traditional devices, the enormous mechanical energy generated by mold opening and closing is completely wasted and not effectively utilized. Furthermore, uneven mold temperature fields easily cause warping and shrinkage marks in thin-walled products after demolding, affecting product precision and strength. Finally, the ejection process often lacks coordination with the aforementioned cooling process, failing to achieve optimal production cycle time and leaving room for improvement in overall production efficiency. Therefore, we propose a high-efficiency injection molding device for thin-walled injection molded parts with electrical distribution housings to address this problem. Summary of the Invention

[0004] The purpose of this invention is to provide an efficient injection molding device for thin-walled injection molded parts of power distribution housings, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-efficiency injection molding device for thin-walled injection molded parts for power distribution housings includes: a fixed frame, a first mold and a second mold, wherein the top of the second mold is provided with an air jet mechanism and a linkage mechanism; The first mold has multiple first cooling channels inside, and a vertical shaft is rotatably mounted at the top of the first cooling channel, and a rotating blade is fixedly connected to the bottom of the vertical shaft. The jet mechanism includes a compression box and multiple jet pipes, and the top end of the vertical shaft extends into the corresponding jet pipe and is fixedly connected with a helical blade. The linkage mechanism includes a piston plate, a linkage plate, a fixed plate, and two rotating shafts. The ends of the two rotating shafts that are far apart from each other are fixedly connected to rotating arms. The other ends of the two rotating arms are fixedly connected to the same connecting column. A through hole is opened on the front side of the linkage plate, and the connecting column passes through the through hole.

[0006] Preferably, the piston plate is slidably connected inside the compression chamber, and multiple connecting springs are fixedly connected between the piston plate and the linkage plate. The two rotating shafts are respectively rotatably installed on the inner walls of the front and rear sides of the compression chamber. A connecting arm is fixedly connected to the other end of the rotating shaft, and a connecting rod is hinged to the other end of the connecting arm. The other end of the connecting rod is hinged to the outside of the fixed plate. A guide rod is fixedly installed on the side wall of the compression box, and the linkage plate is slidably sleeved on the outside of the guide rod.

[0007] Preferably, all of the multiple jet pipes are connected to one side of the compression chamber, and a regulating valve is provided inside each jet pipe.

[0008] Preferably, the fixing frame includes: two fixing seats and multiple connecting columns, all of which are fixedly connected between the two fixing seats, and the fixing plate is fixedly installed on the top of the fixing seat located on the left side; An electric push rod and multiple telescopic rods are fixedly installed on one side of the fixed base on the left side. The output end of the electric push rod and the other end of the telescopic rod are fixedly connected to the corresponding first mold. A controller is fixedly installed on the other side of the fixed base on the left side. The second mold is fixedly connected to one side of the fixed base located on the right side. Multiple guide seats are fixedly installed on both the front and rear sides of the first mold. The guide seats are slidably sleeved on the outside of the corresponding connecting column.

[0009] Preferably, an ejection mechanism is provided on the outer side of the second mold. The ejection mechanism includes an ejection frame and two cylinders. A push rod is fixedly connected to the output end of the cylinder. The other end of the push rod is fixedly connected to one side of the ejection frame. The ejection frame is slidably sleeved on the outer side of the second mold. The cylinders are fixedly installed in the fixed seat located on the right side.

[0010] Preferably, the second mold has an injection port, an vent, and multiple second cooling channels on one side, and the multiple second cooling channels are evenly arranged at equal intervals.

[0011] The beneficial effects of this invention are as follows: 1. The present invention discloses a high-efficiency injection molding device for thin-walled injection molded parts with electrical distribution housings. This device converts the linear motion mechanical energy during mold opening and closing into the potential energy of compressed air and stores it. This stored potential energy is then released during the cooling stage to drive internal agitation in the cooling system, achieving efficient recovery and utilization of waste energy during production. This design creatively couples the inevitable action of mold closing with improved cooling efficiency, eliminating the need for an additional independent power source to drive enhanced cooling. This significantly enhances the overall energy efficiency of the system without increasing equipment energy consumption. This mechanism of capturing and reusing the equipment's own motion energy fundamentally revolutionizes the traditional injection molding device cooling auxiliary system's reliance on continuous external power supply, providing an innovative solution for achieving green and low-cost injection molding production.

[0012] 2. The high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings described in this invention utilizes compressed air to drive the spiral blades to rotate at high speed. Simultaneously, the rotating blades immersed in the cooling channel are driven by a vertical shaft to generate powerful agitation, completely changing the traditional passive heat exchange mode where mold cooling relies on the static or low-speed flow of the cooling medium through the channel. This active, forced turbulent agitation continuously disrupts the stagnant thermal boundary layer near the cooling channel wall, resulting in an order-of-magnitude increase in the heat exchange intensity between the cooling medium and the mold cavity wall. This achieves rapid and uniform heat removal from the mold, especially the cavity area. This effect is crucial for the production of extremely thin-walled housing parts, ensuring uniform cooling and solidification of the product in a very short time. It effectively avoids defects such as internal stress concentration and warping deformation caused by inconsistent or insufficient cooling rates, greatly improving the dimensional stability and internal quality of the product.

[0013] 3. The high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings described in this invention integrates energy recovery and conversion, efficient active cooling, and automated ejection functions into a coordinated and coherent system. This achieves a high degree of synergy and seamless connection throughout the entire production cycle, from mold closing, injection molding, cooling to mold opening and ejection. The linkage mechanism ensures that the timing of energy storage and release precisely corresponds to the production cycle, while the integrated ejection mechanism operates immediately after cooling, significantly shortening the waiting and transition time between processes. This integrated design not only directly shortens the longest cooling stage in the production cycle by enhancing cooling at the physical level, but also optimizes the connection efficiency of each link at the system process level, thereby achieving a significant reduction in the overall production cycle. This makes the device particularly suitable for the large-scale, continuous, and stable production of thin-walled injection molded parts with stringent requirements for production efficiency and cost control. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural schematic diagram of an efficient injection molding device for thin-walled injection molded parts of power distribution housings proposed in this invention; Figure 2 This is a cross-sectional view of a high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings proposed in this invention. Figure 3 for Figure 2 A magnified view of part A in the middle; Figure 4 for Figure 2 A magnified view of part B in the middle section; Figure 5 for Figure 2 A magnified view of part C in the middle; Figure 6 This is a three-dimensional structural diagram of the first mold and air jet mechanism proposed in this invention; Figure 7 This is a partial cross-sectional view of the second mold proposed in this invention; Figure 8 This is a three-dimensional structural diagram of the linkage mechanism proposed in this invention; Figure 9 This is a three-dimensional structural diagram of the vertical shaft, helical blade, and rotating blade proposed in this invention.

[0015] In the diagram: 1. Fixed base; 101. Connecting column; 2. First mold; 201. First cooling channel; 202. Guide seat; 3. Second mold; 301. Injection port; 302. Second cooling channel; 303. Exhaust port; 4. Air jet mechanism; 401. Compression box; 402. Air jet pipe; 403. Adjusting valve; 5. Vertical shaft; 501. Spiral blade; 502. Rotating blade; 6. Linkage mechanism; 601. Piston plate; 602. Connecting arm; 603. Connecting rod; 604. Fixed plate; 605. Rotating shaft; 606. Rotating arm; 607. Linkage plate; 6071. Through hole; 608. Connecting column; 609. Connecting spring; 610. Guide rod; 7. Ejector frame; 701. Ejector rod; 702. Cylinder; 8. Electric push rod; 9. Telescopic rod; 10. Controller. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] Reference Figures 1-9A high-efficiency injection molding device for thin-walled injection molded parts of power distribution housing includes: a fixed frame, a first mold 2 and a second mold 3. The top of the second mold 3 is provided with an air jet mechanism 4 and a linkage mechanism 6. This layout makes reasonable use of the space above the mold and integrates energy conversion and enhanced cooling system into one unit, making the device compact and functionally efficient.

[0018] The first mold 2 has multiple first cooling channels 201 inside. A vertical shaft 5 is rotatably mounted on the top of the first cooling channel 201, and a rotating blade 502 is fixedly connected to the bottom of the vertical shaft 5. The vertical shaft 5 is the core transmission component, and its material can be high-strength stainless steel to ensure corrosion resistance and rigidity during long-term rotation in the cooling medium. The rotation of the rotating blade 502 can strongly disturb the surrounding fluid.

[0019] The jet mechanism 4 includes a compression box 401 and multiple jet pipes 402. The top end of the vertical shaft 5 extends into the corresponding jet pipe 402 and is fixedly connected to a spiral blade 501. The compression box 401 serves as a temporary storage unit for high-pressure gas, and its shell must have good airtightness and pressure resistance. The jet pipe 402 precisely guides the airflow to the spiral blade 501, converting its kinetic energy into rotational mechanical energy.

[0020] The linkage mechanism 6 includes a piston plate 601, a linkage plate 607, a fixed plate 604, and two rotating shafts 605. Rotating arms 606 are fixedly connected to the opposite ends of the two rotating shafts 605, and the same connecting post 608 is fixedly connected to the other ends of the two rotating arms 606. A through hole 6071 is provided on the front side of the linkage plate 607, and the connecting post 608 passes through the through hole 6071. This linkage mechanism 6 cleverly converts linear motion into rotational motion, and further into the compression and storage of gas, making it the core mechanism for energy recovery in the device.

[0021] In this embodiment, the piston plate 601 is slidably connected inside the compression box 401, and multiple connecting springs 609 are fixedly connected between the piston plate 601 and the linkage plate 607. Two rotating shafts 605 are respectively rotatably mounted on the inner walls of the front and rear sides of the compression box 401. The other end of the rotating shaft 605 is fixedly connected to a connecting arm 602, and the other end of the connecting arm 602 is hinged to a connecting rod 603. The other end of the connecting rod 603 is hinged to the outside of the fixed plate 604. The function of the connecting springs 609 is to store energy when the mold is closed and release it when the mold is opened to help the mechanism reset and ensure the stability of the action cycle. The hinged connection method ensures the flexibility and smoothness of force transmission.

[0022] A guide rod 610 is fixedly installed on the side wall of the compression chamber 401, and the linkage plate 607 is slidably sleeved on the outside of the guide rod 610. The guide rod 610 provides precise linear guidance for the movement of the linkage plate 607, preventing it from deviating and ensuring the smoothness of the piston plate 601's movement and the reliability of its sealing.

[0023] In this embodiment, multiple jet pipes 402 are connected to one side of the compression chamber 401, and a regulating valve 403 is installed inside the jet pipe 402. The regulating valve 403 is used to control the timing and flow rate of the airflow, and is a key component for achieving on-demand energy supply and precise control during the cooling stage.

[0024] In this embodiment, the fixing frame includes two fixing seats 1 and multiple connecting columns 101. The multiple connecting columns 101 are fixedly connected between the two fixing seats 1. The fixing plate 604 is fixedly installed on the top of the fixing seat 1 located on the left side. The fixing seats 1 provide a stable installation base for the device, and the connecting columns 101 form a precise track for the movement of the first mold 2, ensuring the alignment of the mold closing.

[0025] An electric push rod 8 and multiple telescopic rods 9 are fixedly installed on one side of the fixed base 1 on the left. The output end of the electric push rod 8 and the other end of the telescopic rods 9 are fixedly connected to the corresponding first mold 2. A controller 10 is fixedly installed on the other side of the fixed base 1 on the left. The electric push rod 8 serves as a power source, providing stable and controllable thrust. The multiple telescopic rods 9 work in conjunction with the electric push rod 8 to ensure the balance and rigidity of the first mold 2 when it moves along the connecting column 101, avoiding jamming or uneven load that may occur with single-point drive. The controller 10 serves as the control center, coordinating the action sequence of the electric push rod 8, the regulating valve 403, and the ejection mechanism.

[0026] The second mold 3 is fixedly connected to one side of the fixed base 1 located on the right side. Multiple guide seats 202 are fixedly installed on both the front and rear sides of the first mold 2. The guide seats 202 are slidably sleeved on the outside of the corresponding connecting posts 101. The guide seats 202 and the connecting posts 101 form a high-precision sliding pair. The material can be a wear-resistant copper-based alloy, which can maintain the movement accuracy and reduce friction loss during long-term use.

[0027] In this embodiment, an ejection mechanism is provided on the outer side of the second mold 3. The ejection mechanism includes an ejection frame 7 and two cylinders 702. A push rod 701 is fixedly connected to the output end of the cylinder 702, and the other end of the push rod 701 is fixedly connected to one side of the ejection frame 7. The ejection frame 7 is slidably sleeved on the outer side of the second mold 3, and the cylinders 702 are fixedly installed in the fixed seat 1 located on the right side. The design of the ejection frame 7 allows it to apply force evenly to the edge of the product, avoiding whitening or deformation. The synchronous action of the two cylinders 702 ensures the smoothness of the ejection process and the balanced force on the product.

[0028] In this embodiment, the second mold 3 has an injection port 301, a vent 303, and multiple second cooling channels 302 on one side, which are evenly spaced. The evenly spaced second cooling channels 302 are designed to create a uniform temperature field on the back of the mold cavity, and the vent 303 can effectively discharge gas from the cavity, preventing bubbles or incomplete filling in the product.

[0029] In this embodiment, during use, the controller 10 controls the electric push rod 8 to extend, driving the first mold 2 to move smoothly along the connecting column 101 towards the fixed second mold 3 until the mold is fully closed. During the mold closing process, the connecting rod 603 and the connecting arm 602 cooperate to drive the rotating shaft 605 to rotate. The rotating shaft 605 drives the connecting column 608 to perform clockwise circular motion through the rotating arm 606. At the same time, the connecting column 608, through its cooperation with the through hole 6071, drives the linkage plate 607 to move to the right in the compression box 401 and compresses the connecting spring 609. This process converts the linear mechanical energy output by the electric push rod 8 into the compressive potential energy of the connecting spring 609 and the increase in gas pressure in the compression box 401 through the ingenious connecting rod and rotating shaft mechanism, thus completing the energy recovery and storage in the production process.

[0030] Subsequently, molten plastic is injected into the mold cavity through injection port 301 to form a thin-walled shell. Cooling medium is introduced into the first cooling channel 201 and the second cooling channel 302 respectively, and the regulating valve 403 is opened at the same time. The cooling medium flows through the first cooling channel 201 and the second cooling channel 302, carrying away the heat in the first mold 2 and the second mold 3, realizing the rapid cooling and forming of the thin-walled shell. At the same time, the opening of the regulating valve 403 allows the gas in the compression box 401 to enter the jet pipe 402. The high-speed airflow drives the spiral blade 501 located in the jet pipe 402 to rotate at high speed. The spiral blade 501 drives the rotating blade 502 at the bottom to rotate synchronously in the first cooling channel 201 through the vertical shaft 5, thereby powerfully agitating the coolant in the mold, greatly enhancing the heat exchange efficiency, and realizing rapid and uniform cooling of the thin-walled product. In this stage, the potential energy of the stored compressed air is released and converted into the high-speed rotational kinetic energy of the spiral blade 501, which in turn drives the active agitation in the cooling channel, breaking the thermal boundary layer of traditional static or advection cooling, and making the cooling efficiency a qualitative leap.

[0031] After cooling, the electric push rod 8 drives the first mold 2 to open and reset, and the linkage mechanism 6 also returns to its initial state under the action of the connecting spring 609. The elastic potential energy stored in the connecting spring 609 is released at this moment, assisting the components of the linkage mechanism 6 to reset, preparing for the next work cycle and reducing drive energy consumption. Subsequently, the two cylinders 702 of the ejection mechanism act synchronously, pushing the ejector rod 701 and the ejection frame 7 along the outside of the second mold 3 to eject the solidified product, completing the entire injection molding cycle. The core of this device lies in cleverly converting the linear motion of mold closing into the storage of compressed air and the active stirring of the cooling system, thereby achieving a substantial improvement in cooling efficiency and a significant reduction in production cycle, which is particularly suitable for the efficient and high-quality production of thin-walled injection molded parts such as electrical distribution housings. The entire system achieves closed-loop coordination of energy flow and workflow.

[0032] The above provides a detailed description of a high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings provided by the present invention. Specific embodiments have been used to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings, characterized in that, include: The frame includes a first mold (2) and a second mold (3), with an air jet mechanism (4) and a linkage mechanism (6) provided on the top of the second mold (3). The first mold (2) has multiple first cooling channels (201) inside. A vertical shaft (5) is rotatably installed at the top of the first cooling channel (201), and a rotating blade (502) is fixedly connected to the bottom of the vertical shaft (5). The jet mechanism (4) includes a compression box (401) and multiple jet pipes (402), and the top end of the vertical shaft (5) extends into the corresponding jet pipe (402) and is fixedly connected with a helical blade (501). The linkage mechanism (6) includes: a piston plate (601), a linkage plate (607), a fixed plate (604), and two rotating shafts (605). The two rotating shafts (605) are fixedly connected to rotating arms (606) at their ends that are far apart from each other. The other ends of the two rotating arms (606) are fixedly connected to the same connecting column (608). A through hole (6071) is provided on the front side of the linkage plate (607), and the connecting column (608) passes through the through hole (6071).

2. The high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings according to claim 1, characterized in that, The piston plate (601) is slidably connected inside the compression box (401), and a plurality of connecting springs (609) are fixedly connected between the piston plate (601) and the linkage plate (607). The two rotating shafts (605) are respectively rotatably installed on the inner walls of the front and rear sides of the compression box (401). The other end of the rotating shaft (605) is fixedly connected to a connecting arm (602), and the other end of the connecting arm (602) is hinged to a connecting rod (603). The other end of the connecting rod (603) is hinged to the outside of the fixed plate (604). A guide rod (610) is fixedly installed on the side wall of the compression box (401), and the linkage plate (607) is slidably sleeved on the outside of the guide rod (610).

3. The high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings according to claim 1, characterized in that, Multiple jet pipes (402) are connected to one side of the compression box (401), and a regulating valve (403) is provided inside the jet pipe (402).

4. The high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings according to claim 1, characterized in that, The fixing frame includes: two fixing seats (1) and multiple connecting columns (101), the multiple connecting columns (101) are fixedly connected between the two fixing seats (1), and the fixing plate (604) is fixedly installed on the top of the fixing seat (1) located on the left side; An electric push rod (8) and multiple telescopic rods (9) are fixedly installed on one side of the fixed base (1) on the left side. The output end of the electric push rod (8) and the other end of the telescopic rod (9) are fixedly connected to the corresponding first mold (2). A controller (10) is fixedly installed on the other side of the fixed base (1) on the left side. The second mold (3) is fixedly connected to one side of the fixed seat (1) located on the right side. Multiple guide seats (202) are fixedly installed on both the front and rear sides of the first mold (2). The guide seats (202) are slidably sleeved on the outside of the corresponding connecting column (101).

5. The high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings according to claim 4, characterized in that, The second mold (3) is provided with an ejection mechanism on its outer side. The ejection mechanism includes an ejection frame (7) and two cylinders (702). A push rod (701) is fixedly connected to the output end of the cylinder (702). The other end of the push rod (701) is fixedly connected to one side of the ejection frame (7). The ejection frame (7) is slidably sleeved on the outer side of the second mold (3). The cylinder (702) is fixedly installed in the fixed seat (1) located on the right side.

6. The high-efficiency injection molding device for thin-walled injection molded parts of power distribution housings according to claim 1, characterized in that, The second mold (3) has an injection port (301), an exhaust port (303) and multiple second cooling channels (302) on one side, and the multiple second cooling channels (302) are evenly arranged at equal intervals.

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