Automobile lightweight plastic body arc bending manufacturing line

Abstract

The application discloses a kind of automobile light weight plastic car body arc bending manufacturing line, belong to light weight automobile manufacturing technical field, including machine tool base, the machine tool base top is fixedly installed with injection molding machine main body, and machine tool base top is also fixedly installed with protective shell, and the protective shell inner cavity is installed with running track.In the application, the relative inclination angle of two sides adjusting plate is adjusted by the elongation or shortening of first electric push rod, the adjusting plate can be pulled to rotate the hinged mold core plate after angle adjustment by first hinged seat, the mold core plate rotation can be relatively rotated around the other side second hinged seat, effectively adjust the bending angle of mold core plate and connecting plate in mold core seat, it is favorable to quickly adjust bending forming curve angle, improve injection molding adaptability, and adjacent mold core plate and mold core plate and adjusting plate can be closed by sealing gasket, and sealing gasket can be selected with high-temperature-resistant heat-resistant graphite pad to ensure that injection molding temperature is used.

Description

Technical Field

[0001] This invention belongs to the field of lightweight automotive manufacturing technology, and in particular relates to a manufacturing line for curved plastic car bodies for lightweight automobiles. Background Technology

[0002] Lightweighting of automobiles means reducing the vehicle's curb weight as much as possible while maintaining its strength. With the development of new energy vehicles, the demand for lightweight vehicle bodies is increasing in order to improve driving range. In existing lightweight vehicle bodies, the front and rear bumpers are generally manufactured by injection molding.

[0003] Chinese patent application CN115401869A discloses a molding die for an automotive front fascia, comprising: an upper mold body and a lower mold body. The lower mold body has lifting rings on both sides and several mold feet at its bottom. The contact surfaces of the upper and lower mold bodies form a tapered seal. The upper mold body has an upper mold base plate at its top. After the upper and lower mold bodies are closed, a cavity for forming the automotive front fascia structure is formed between them. This application also provides a molding process for the automotive front fascia molding die, using the aforementioned automotive front fascia molding die. The molding die of the above solution uses a tapered seal structure to replace the sealing strip, thus avoiding the wear and replacement of the sealing strip and eliminating the need to deal with the generated sealing strip waste. However, the arc-shaped bending curve of the front cover in the above solution depends on the angle of the product cavity, which leads to a fixed arc-shaped bending angle of the front cover. It has a wide range of adaptability to different arc-shaped bending curves of the car body. Furthermore, since the space inside the injection cavity is relatively narrow during the injection molding of lightweight car bodies, it is easy to affect the flow of the injection liquid, resulting in defects on the surface of the injection molded parts. There is room for improvement. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the narrow space inside the injection cavity during lightweight car body injection molding can easily affect the flow of the injection liquid, leading to defects on the surface of the injection molded parts. Therefore, this invention proposes a curved bending manufacturing line for lightweight plastic car bodies.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lightweight plastic car body arc bending manufacturing line includes a machine tool base, an injection molding machine body fixedly mounted on the top of the machine tool base, and a protective shell fixedly mounted on the top of the machine tool base. A travel rail is installed in the inner cavity of the protective shell, and a moving mold base is fixedly mounted on the top of the travel rail. A fixed mold base is fixedly mounted on the side of the inner cavity of the protective shell away from the travel rail, and the fixed mold base is connected to the die head side of the injection molding machine body. A mold core mechanism is fixedly mounted in the inner cavity of the moving mold base, a heat dissipation mechanism is fixedly mounted on the rear side of the mold core mechanism, and an exhaust mechanism is fixedly mounted on one side of the fixed mold base.

[0007] The mold core mechanism includes a mold core seat, and exhaust channels are provided on both sides of the inner cavity of the mold core seat. The exhaust mechanism is installed on one side of the exhaust channel. The inner cavity of the mold core seat is provided with two angle-adjustable adjustment plates. The mold core plate is drivenly connected to one side of the adjustment plate. The mold core plate is rotatably connected to a groove opened on one side of the inner cavity of the mold core seat, which is used to adjust the curvature of the inner cavity of the fixed mold core seat through the adjustment plates and the mold core plate.

[0008] As a further description of the above technical solution:

[0009] The mold core mechanism also includes a protective seat, which is fixedly connected to the inner cavity of the mold core seat. A first hinge block is fixedly connected to one side of the adjusting plate, and a connecting rod is hinged between adjacent first hinge blocks on both sides of the adjusting plate via a pin. The other end of the connecting rod is hinged to a connecting plate via a pin, and a first electric push rod is fixedly connected to one side of the connecting plate, which is also fixedly connected to one side of the inner cavity of the protective seat. A second hinge block is fixedly connected to both sides of one side of the adjusting plate, and both second hinge blocks are rotatably connected to one side of the adjusting plate via pins to control the adjusting plate to rotate and offset around the second hinge block. A first hinge seat is fixedly connected to the side of the connecting plate near the mold core plate, and the first hinge seat is rotatably connected to one side of the mold core plate. A second hinge seat is rotatably connected to one side of the mold core plate, and a locking plate is fixedly connected to one side of the second hinge seat. The locking plate is engaged in a slot opened on one side of the inner cavity of the mold core seat.

[0010] As a further description of the above technical solution:

[0011] A sealing gasket is fixedly connected between adjacent sides of the two adjustment plates, and a collapse groove is opened on the rear side of the sealing gasket. A filling gasket is fixedly connected to one side of the adjustment plate, and the filling gasket is attached to one side of the mold core plate.

[0012] As a further description of the above technical solution:

[0013] The bottom of the adjustment plate is fixedly connected to a slider, which is slidably connected in a groove opened in the inner cavity of the protective seat. The groove has an arc-shaped cross-section.

[0014] As a further description of the above technical solution:

[0015] The heat dissipation mechanism includes a mounting frame, which is fixedly installed in the inner cavity of the moving mold base. A medium seat is slidably connected to the inner cavity of the mounting frame. A plurality of first medium plates and second medium plates are connected to one side of the medium seat. The first medium plates and second medium plates are filled with heat exchange media of different temperatures. A heat exchange plate is provided at a corresponding position on one side of the first medium plates and second medium plates. A contact heat exchange part is connected between the plurality of heat exchange plates. The contact heat exchange part is in contact with one side of the mold core base and is used to adjust the injection temperature in the mold core base through heat exchange between the first medium plates and second medium plates and the heat exchange plate.

[0016] As a further description of the above technical solution:

[0017] The inner cavity of the medium seat has two medium chambers, which are arranged in an S-shape. The medium seat is a heat insulation component, and the two medium chambers are respectively connected to the first medium plate and the second medium plate at corresponding positions. This is used to exchange heat between the mediums at different temperatures through the two medium chambers and the corresponding first and second medium plates. The medium chambers on both sides are respectively connected to a cold liquid tank and a hot liquid tank through two heat exchange circulation pipes and a pump body. The cold liquid tank and the hot liquid tank are respectively fixedly installed at corresponding positions on both sides of the moving mold seat.

[0018] As a further description of the above technical solution:

[0019] A heat insulation block is fixedly connected between the opposing surfaces of the first and second dielectric plates.

[0020] As a further description of the above technical solution:

[0021] The exhaust mechanism includes an air bladder. Guide rods are provided at the four corners of the inner cavity of the protective shell, and the moving mold base is slidably connected to the outside of the guide rods. The air bladder is sleeved on the outside of the guide rods, and a purge air passage is connected between the ends of two adjacent air bladders through a pipeline. The purge air passage is fixedly installed on one side of the moving mold base. Multiple exhaust pipes are fixedly connected to the bottom of the purge air passage. An exhaust nozzle is connected to the end of the exhaust pipe, and the exhaust nozzle is inserted and connected inside the exhaust passage.

[0022] As a further description of the above technical solution:

[0023] The diameter of the exhaust passage is larger than that of the exhaust pipe and the exhaust nozzle.

[0024] As a further description of the above technical solution:

[0025] A push block is fixedly connected to the rear side of the medium seat, a second electric push rod is fixedly connected to one side of the push block, an installation block is fixedly installed on one side of the second electric push rod, and the installation block is fixedly installed on one side of the mold core seat.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. In this invention, when it is necessary to adjust the injection cavity angle, the connecting plate is moved by the extension of the first electric push rod. The movement of the connecting plate can drive the connecting rod to move, and the movement of the connecting rod can drive the first hinge block on the other side to move. The first hinge block can adjust the plate to rotate around the second hinge block, thereby adjusting the relative tilt angle of the two adjustment plates by extending or shortening the first electric push rod. After the angle is adjusted, the adjustment plate can pull the hinged mold core plate to rotate through the first hinge seat. The rotation of the mold core plate can rotate relative to the second hinge seat on the other side, effectively adjusting the bending angle of the mold core plate and the connecting plate in the mold core seat. This is beneficial for quickly adjusting the bending forming curve angle, improving the injection molding adaptability. Furthermore, adjacent mold core plates and the mold core plate and the adjustment plate can be sealed by a sealing gasket. The sealing gasket can be a high-temperature resistant graphite gasket to ensure the injection molding temperature.

[0028] 2. In this invention, through a designed heat exchange mechanism, a high-temperature heat exchange medium from the hot liquid vessel is introduced into the first medium plate. After the second electric push rod is controlled to move the medium seat, multiple first medium plates can contact the heat exchange plate for heat exchange and heating. The heated heat exchange plate can transfer heat to the rear adjustment plate and the mold core plate by adhering to the heat exchange plate. This helps to maintain the temperature of the adjustment plate and the mold core plate during injection molding, thereby improving the flowability of the injection liquid and preventing the injection liquid from stagnating in the injection cavity. At the same time, when the injection is nearing completion, the second electric push rod is controlled to reset, causing the second medium plate to contact the heat exchange plate. After the cooling vessel introduces a lower-temperature heat exchange medium into the second medium plate, the contact heat exchange with the mold core plate and the adjustment plate rapidly cools the surface of the internal injection molded product. This achieves temperature control before and after injection molding, improves the injection effect and molding efficiency of ultra-thin injection molded products, and increases the injection molding yield.

[0029] 3. In this invention, the designed exhaust mechanism allows the air bladder connected to one side to slide outside the guide rod when the moving mold base moves. During the movement, the air bladder collapses upon contact with the fixed mold base at its end. At this time, the compressed air bladder, under the limiting action of the one-way valve, sends gas into the purging air passage. The gas sent into the purging air bladder can be sprayed into the mold core base through the exhaust pipe and exhaust nozzle. When the mold core base is not in contact with the moving mold base, the sprayed gas can blow and purge the mold core base, effectively reducing the residual injection gas in the mold core base. Furthermore, when the mold core base is not in contact with the moving mold base, the purging at the exhaust nozzle can drive the airflow upward through the tapered part of the exhaust nozzle and out through the larger diameter exhaust channel. The external suction generated by the exhaust nozzle causes the gas in the mold core base to be sucked out under negative pressure, and no additional negative pressure vacuum equipment is required, reducing the difficulty of injection molding. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a lightweight plastic car body arc bending manufacturing line proposed in this invention.

[0031] Figure 2 This is a schematic diagram of the exploded disassembly structure of the mold core mechanism for a lightweight plastic car body arc bending manufacturing line proposed in this invention.

[0032] Figure 3 This is a schematic diagram of the disassembled structure of the exhaust mechanism in a manufacturing line for the curved bending of a lightweight plastic car body, as proposed in this invention.

[0033] Figure 4 This is a top-view cross-sectional view of the core mechanism of a lightweight plastic car body arc bending manufacturing line proposed in this invention.

[0034] Figure 5 The present invention proposes Figure 4 Enlarged structural diagram of part A in the middle;

[0035] Figure 6 This is a schematic diagram of the lateral section of the core mechanism of a manufacturing line for the curved bending of lightweight plastic car bodies proposed in this invention.

[0036] Figure 7 The present invention proposes Figure 6 Enlarged structural diagram of section B;

[0037] Figure 8 This is a schematic diagram of the protective seat structure of a lightweight plastic car body arc bending manufacturing line proposed in this invention.

[0038] Figure 9 This is an exploded structural diagram of an arc-shaped bending manufacturing line for lightweight plastic car bodies proposed in this invention.

[0039] Figure 10 This is a schematic diagram of the mold core mechanism assembly structure for a lightweight plastic car body arc bending manufacturing line proposed in this invention.

[0040] Legend:

[0041] 1. Machine tool base; 2. Injection molding machine body; 3. Protective shell; 4. Exhaust mechanism; 401. Inflating airbag; 402. Purging air passage; 403. Exhaust pipe; 404. Exhaust nozzle; 5. Moving mold base; 6. Fixed mold base; 7. Mold core mechanism; 701. Mold core base; 702. Exhaust passage; 703. Adjusting plate; 704. Sealing gasket; 705. Protective seat; 706. First electric push rod; 707. Connecting plate; 708. Connecting rod; 709. First hinge 710. Filler pad; 711. First hinge seat; 712. Mold core plate; 713. Clamping plate; 714. Second hinge seat; 715. Slide groove; 716. Second hinge block; 8. Heat equalization mechanism; 801. Heat exchange circulation pipe; 802. Mounting frame; 803. Medium seat; 804. First medium plate; 805. Heat insulation block; 806. Second medium plate; 807. Heat exchange plate; 808. Adhesive heat exchange part; 812. Hot liquid vessel; 813. Cold liquid vessel. Detailed Implementation

[0042] 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.

[0043] Please see Figure 1-10 The present invention provides a technical solution: a manufacturing line for curved bending of lightweight plastic car body, including a machine tool base 1, an injection molding machine body 2 fixedly installed on the top of the machine tool base 1, and a protective shell 3 fixedly installed on the top of the machine tool base 1. A travel rail is installed in the inner cavity of the protective shell 3, and a moving mold base 5 is fixedly installed on the top of the travel rail. A fixed mold base 6 is fixedly installed on the side of the inner cavity of the protective shell 3 away from the travel rail, and the fixed mold base 6 is connected to the mold head side of the injection molding machine body 2. A mold core mechanism 7 is fixedly installed in the inner cavity of the moving mold base 5. A heat dissipation mechanism 8 is fixedly installed on the rear side of the mold core mechanism 7. An exhaust mechanism 4 is fixedly installed on one side of the moving mold base 5.

[0044] The mold core mechanism 7 includes a mold core seat 701. Exhaust channels 702 are provided on both sides of the inner cavity of the mold core seat 701, and one side of the exhaust mechanism 4 is installed inside the exhaust channel 702. The inner cavity of the mold core seat 701 has two angle-adjustable adjusting plates 703, and one side of the adjusting plate 703 is connected to a mold core plate 712. The mold core plate 712 is rotatably connected to a groove opened on one side of the inner cavity of the mold core seat 701, used to adjust the curvature of the inner cavity of the fixed mold base 6 through the adjusting plates 703 and the mold core plate 712. The mold core mechanism 7 also includes a protective seat 705, which is fixedly connected to the mold core seat 701. 1. In the inner cavity, a first hinge block 709 is fixedly connected to one side of the adjusting plate 703, and a connecting rod 708 is hinged between adjacent first hinge blocks 709 on both sides of the adjusting plate 703 via a pin. The other end of the connecting rod 708 is hinged to a connecting plate 707 via a pin, and a first electric push rod 706 is fixedly connected to one side of the connecting plate 707. The first electric push rod 706 is fixedly connected to one side of the inner cavity of the protective seat 705. Second hinge blocks 716 are fixedly connected to both sides of one side of the adjusting plate 703, and both sides of the second hinge blocks 716 are rotatably connected to one side of the adjusting plate 703 via pins. For controlling the rotation and offset of the adjusting plate 703 around the second hinge block 716, a first hinge seat 711 is fixedly connected to the side of the connecting plate 707 near the mold core plate 712. The first hinge seat 711 is rotatably connected to one side of the mold core plate 712. A second hinge seat 714 is rotatably connected to one side of the mold core plate 712. A retaining plate 713 is fixedly connected to one side of the second hinge seat 714. The retaining plate 713 is engaged in a retaining groove opened on one side of the inner cavity of the mold core seat 701. A sealing gasket 704 is fixedly connected between adjacent sides of the two adjusting plates 703, and a collapsible opening is provided on the rear side of the sealing gasket 704. A filling pad 710 is fixedly connected to one side of the adjusting plate 703. The filling pad 710 is attached to one side of the mold core plate 712. A slider is fixedly connected to the bottom of the adjusting plate 703. The slider is slidably connected in the groove 715 opened in the inner cavity of the protective seat 705. The cross-sectional shape of the groove 715 is arc-shaped. Through the designed groove 715, the connecting plate 707 can ensure the stroke angle by sliding the slider in the groove 715, so as to ensure the rotation direction of the connecting plate 707. In addition, through the designed sealing gasket 704, the sealing gasket 704 can ensure the collapse angle through the rear collapse groove.

[0045] The specific implementation method is as follows: When the moving mold base 5 slides outside the guide rod via the rear drive mechanism, the moving mold base can drive the inner mold core base 701 to seal against one side of the fixed mold base 6. When the injection molding machine body 2 operates, it fully compresses the raw material and injects it into the fixed mold base 6 through the mold head. The injected plastic can be formed in the injection cavity between the fixed mold base 6 and the mold core base 701. When it is necessary to adjust the angle of the injection cavity, the first electric push rod 706 can extend to drive the connecting plate 707 to move. The movement of the connecting plate 707 can push the connecting rod 708 to move. The movement of the connecting rod 708 can drive the first hinge block 709 on the other side to move. The first hinge block 709 can adjust the plate 703 to rotate around the second hinge block 716, thereby enabling... The extension or shortening of the first electric push rod 706 adjusts the relative tilt angle of the two adjustment plates 703. After the angle is adjusted, the adjustment plate 703 can pull the hinged mold core plate 712 to rotate through the first hinge seat 711. The rotation of the mold core plate 712 can rotate relative to the second hinge seat 714 on the other side, thereby effectively adjusting the bending angle of the mold core plate 712 and the connecting plate 707 in the mold core seat 701. This is beneficial for quickly adjusting the bending forming curve angle and improving the injection molding adaptability. Furthermore, the adjacent mold core plates 712 and the mold core plate 712 and the adjustment plate 703 can be sealed by the sealing gasket 704. The sealing gasket 704 can be made of high-temperature resistant graphite to ensure the injection molding temperature.

[0046] Please see Figures 4-5 and Figure 9 The heat equalization mechanism 8 includes a mounting frame 802, which is fixedly installed in the inner cavity of the moving mold base 5. A medium seat 803 is slidably connected to the inner cavity of the mounting frame 802. A plurality of first medium plates 804 and second medium plates 806 are connected to one side of the medium seat 803. The first medium plates 804 and second medium plates 806 are filled with heat exchange mediums of different temperatures. A heat exchange plate 807 is provided at a corresponding position on one side of the first medium plates 804 and second medium plates 806. A contact heat exchange part 808 is connected between the plurality of heat exchange plates 807. The contact heat exchange part 808 is in contact with one side of the mold core base 701 and is used to adjust the mold core base 701 through the contact heat exchange between the first medium plates 804 and second medium plates 806 and the heat exchange plates 807. 1. Internal injection temperature: The media seat 803 has two media chambers arranged in an S-shape. The media seat 803 is a heat insulation component. The two media chambers are connected to the first media plate 804 and the second media plate 806 at corresponding positions, respectively, for heat exchange of media at different temperatures through the communication between the two media chambers and the corresponding first media plate 804 and second media plate 806. The media chambers on both sides are connected to a cold liquid tank 813 and a hot liquid tank 812 through two heat exchange circulation pipes 801 and a pump body, respectively. The cold liquid tank 813 and the hot liquid tank 812 are fixedly installed at corresponding positions on both sides of the moving mold base 5. A heat insulation block 805 is fixedly connected between the opposite surfaces of the first media plate 804 and the second media plate 806.

[0047] The specific implementation method is as follows: Through the designed heat equalization mechanism 8, before injection molding, to ensure the fluidity of the injection molding liquid, the average temperature of the moving mold base 5 and the fixed mold base 6 should be maintained. At this time, a heat exchange medium with a higher temperature in the hot liquid tank 812 can be sent into the first medium plate 804. After controlling the second electric push rod to pull the medium seat 803 to move, multiple first medium plates 804 can contact the heat exchange plate 807 for heat exchange and temperature rise. The heated heat exchange plate 807 can transfer heat to the rear adjusting plate 703 and the mold core plate 712 through the contact heat exchange part 808, which is beneficial for maintaining the temperature of the adjusting plate during injection molding. The temperature of 703 and the core plate 712 increases the flowability of the injection molding liquid, preventing it from stagnating in the injection cavity. At the same time, when the injection is nearing completion, the second electric push rod can be controlled to reset and drive the second medium plate 806 to contact the heat exchange plate 807. After the cooling vessel sends the lower temperature heat exchange medium into the second medium plate 806, the internal injection molded product surface can be rapidly cooled through contact heat exchange with the core plate 712 and the regulating plate 703. This enables temperature control of the injection and pre- and post-injection stages, improves the injection effect and molding efficiency of ultra-thin injection molded products, and increases the injection molding yield.

[0048] Meanwhile, the heat insulation block 805, which is located on the opposite side of the first medium plate 804 and the second medium plate 806 adjacent to the heat exchange plate 807, can reduce the temperature exchange between the first medium plate 804 and the second medium plate 806, effectively reducing the temperature consumption. Furthermore, the medium chambers of the first medium plate 804 and the second medium plate 806 can circulate through the hot liquid vessel 812 and the cold liquid vessel 813, avoiding the impact of continuous heat exchange on the heat exchange effect.

[0049] Please see Figure 1-3 The exhaust mechanism 4 includes an air bladder 401. Guide rods are provided at the four corners of the inner cavity of the protective shell 3, and the moving mold base 5 is slidably connected to the outside of the guide rods. The air bladder 401 is sleeved on the outside of the guide rods, and the ends of two adjacent air bladders 401 are connected by a pipe to a purge air passage 402. The purge air passage 402 is fixedly installed on one side of the moving mold base 5. Multiple exhaust pipes 403 are fixedly connected to the bottom of the purge air passage 402. The exhaust pipes 403 are connected to exhaust nozzles 404 at their ends. The exhaust nozzles 404 are inserted into the exhaust passage 702. The cross-sectional shape of the exhaust nozzles 404 is conical, and the end with the larger diameter of the exhaust nozzles 404 is located in the inner cavity of the mold core base 701. The diameter of the exhaust passage 702 is larger than that of the exhaust pipes 403 and the exhaust nozzles. A push block is fixedly connected to the rear side of the medium base 803. A second electric push rod is fixedly connected to one side of the push block. An installation block is fixedly installed on one side of the second electric push rod. The installation block is fixedly installed on one side of the mold core base 701.

[0050] The specific implementation method is as follows: Through the designed exhaust mechanism 4, when the moving mold base 5 moves, it can push the air bladder 401 connected to one side to slide outside the guide rod. During the movement, the air bladder 401 can collapse through contact between its end and the fixed mold base 6. At this time, the compressed air bladder 401 can send gas into the purging air passage 402 under the limiting action of the one-way valve. The gas sent into the purging air bladder can be expelled into the mold core base 701 through the exhaust pipe 403 and the exhaust nozzle 404. Before the mold core base 701 contacts the fixed mold base 6... When in contact, the injected gas can blow and purge the mold core seat 701, effectively reducing the residual injection gas in the mold core seat 701. When the mold core seat 701 is not in contact with the fixed mold seat 6, the blowing at the exhaust nozzle 404 can drive the airflow through the two sides of the tapered part of the exhaust nozzle 404 and discharge it through the large-diameter exhaust channel. The external suction generated by the Venturi effect of the exhaust nozzle 404 causes the gas in the mold core seat 701 to be sucked out by negative pressure, and there is no need to set up additional negative pressure vacuum equipment, reducing the difficulty of injection molding.

[0051] Working principle: During use, when the moving mold base 5 slides outside the guide rod via the rear drive mechanism, the moving mold base drives the inner mold core base 701 to seal against one side of the fixed mold base 6. When the injection molding machine body 2 operates, it fully compresses the raw material and injects it into the fixed mold base 6 through the mold head. The injected plastic is formed in the injection cavity between the fixed mold base 6 and the mold core base 701. When it is necessary to adjust the injection cavity angle, the first electric push rod 706 extends to drive the connecting plate 707 to move. The movement of the connecting plate 707 pushes the connecting rod 708 to move, and the movement of the connecting rod 708 drives the other side... The first hinge block 709 moves, and the first hinge block 709 adjustment plate 703 rotates around the second hinge block 716, thereby extending or shortening the first electric push rod 706 to adjust the relative tilt angle of the two adjustment plates 703. After the angle is adjusted, the adjustment plate 703 pulls the hinged mold core plate 712 to rotate through the first hinge seat 711. The mold core plate 712 rotates relative to the second hinge seat 714 on the other side, adjusting the bending angle of the mold core plate 712 and the connecting plate 707 in the mold core seat 701, which is beneficial for quickly adjusting the bending forming curve angle.

[0052] A high-temperature heat exchange medium is introduced into the first medium plate 804 through the hot liquid kettle 812. After the medium seat 803 is moved by controlling the second electric push rod, multiple first medium plates 804 come into contact with the heat exchange plate 807 for heat exchange and heating. The heated heat exchange plate 807 transfers heat into the rear regulating plate 703 and the mold core plate 712 through the heat exchange part 808. This helps to improve the flowability of the injection liquid by maintaining the temperature of the regulating plate 703 and the mold core plate 712 during injection molding, and prevents the injection liquid from stagnating in the injection cavity. When the injection is almost completed, the second electric push rod is controlled to work and reset, causing the second medium plate 806 to come into contact with the heat exchange plate 807. After the cooling kettle introduces a lower-temperature heat exchange medium into the second medium plate 806, the internal injection molded product surface is rapidly cooled by contact heat exchange with the mold core plate 712 and the regulating plate 703, and the temperature of the injection molding process is regulated.

[0053] When the moving mold base 5 moves, it pushes the air bladder 401 connected to one side to slide outside the guide rod. During the movement, the air bladder 401 collapses through the contact of its end with the fixed mold base 6. At this time, the compressed air bladder 401 sends gas into the purging air passage 402 under the limiting action of the one-way valve. The gas sent into the purging air bladder is sprayed into the mold core base 701 through the exhaust pipe 403 and the exhaust nozzle 404. When the mold core base 701 is not in contact with the fixed mold base 6, the sprayed gas blows and purifies the mold core base 701, effectively reducing the residual injection gas in the mold core base 701. When the mold core base 701 is not in contact with the fixed mold base 6, the purging at the exhaust nozzle 404 drives the airflow to pass through the two sides of the tapered part of the exhaust nozzle 404 and upward through the larger diameter exhaust passage. The external suction force generated by the Venturi effect of the exhaust nozzle 404 causes the gas in the mold core base 701 to be sucked out by negative pressure.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A manufacturing line for curved bending of lightweight plastic car bodies, comprising a machine tool base (1), wherein an injection molding machine body (2) is fixedly mounted on the top of the machine tool base (1), and a protective shell (3) is also fixedly mounted on the top of the machine tool base (1), characterized in that, The protective shell (3) has a travel track installed in its inner cavity, and a moving mold base (5) is fixedly installed on the top of the travel track. A fixed mold base (6) is fixedly installed on the side of the inner cavity of the protective shell (3) away from the travel track, and the fixed mold base (6) is connected to the mold head side of the injection molding machine body (2). A mold core mechanism (7) is fixedly installed in the inner cavity of the moving mold base (5). A heat dissipation mechanism (8) is fixedly installed on the rear side of the mold core mechanism (7). An exhaust mechanism (4) is fixedly installed on one side of the moving mold base (5). The mold core mechanism (7) includes a mold core seat (701). Both sides of the inner cavity of the mold core seat (701) are provided with exhaust channels (702). The exhaust mechanism (4) is installed on one side of the exhaust channel (702). The inner cavity of the mold core seat (701) is provided with two angle-adjustable adjustment plates (703). The adjustment plate (703) is connected to a mold core plate (712) on one side. The mold core plate (712) is rotatably connected to a groove opened on one side of the inner cavity of the mold core seat (701) for adjusting the curvature of the inner cavity of the moving mold seat (5) by adjusting the adjustment plate (703) and the mold core plate (712). The heat dissipation mechanism (8) includes a mounting frame (802), which is fixedly installed in the inner cavity of the moving mold base (5). A medium seat (803) is slidably connected to the inner cavity of the mounting frame (802). A plurality of first medium plates (804) and second medium plates (806) are connected to one side of the medium seat (803). The first medium plates (804) and second medium plates (806) are filled with heat exchange mediums of different temperatures. A heat exchange plate (807) is provided at a corresponding position on one side of the first medium plates (804) and second medium plates (806). A heat exchange part (808) is connected between the plurality of heat exchange plates (807). The heat exchange part (808) is attached to one side of the mold core base (701) and is used to adjust the injection temperature in the mold core base (701) by contact heat exchange between the first medium plates (804) and second medium plates (806) and the heat exchange plate (807). A push block is fixedly connected to the rear side of the medium seat (803), and a second electric push rod is fixedly connected to one side of the push block. An installation block is fixedly installed on one side of the second electric push rod. The installation block is fixedly installed on one side of the mold core seat (701) to control the second electric push rod to pull the medium seat (803) to move.

2. The automotive lightweight plastic body arc bending manufacturing line according to claim 1, characterized in that, The inner cavity of the medium seat (803) is provided with two medium chambers, and the two medium chambers are arranged in an S-shape. The medium seat (803) is a heat insulation component, and the two medium chambers are respectively connected to the first medium plate (804) and the second medium plate (806) at corresponding positions. They are used to exchange heat between different temperature media through the two medium chambers and the corresponding first medium plate (804) and second medium plate (806). The two medium chambers are respectively connected to the cold liquid tank (813) and the hot liquid tank (812) through two heat exchange circulation pipes (801) and the pump body. The cold liquid tank (813) and the hot liquid tank (812) are respectively fixedly installed at corresponding positions on both sides of the moving mold seat (5).

3. The automotive lightweight plastic body arc bending manufacturing line according to claim 2, characterized in that, A heat insulation block (805) is fixedly connected between the opposing surfaces of the first medium plate (804) and the second medium plate (806).

4. The automotive lightweight plastic body arc bending manufacturing line according to claim 1, characterized in that, The exhaust mechanism (4) includes an air bladder (401). Guide rods are provided at the four corners of the inner cavity of the protective shell (3), and the moving mold base (5) is slidably connected to the outside of the guide rods. The air bladder (401) is sleeved on the outside of the guide rods, and the ends of two adjacent air bladders (401) are connected by a pipeline to a purge air passage (402). The purge air passage (402) is fixedly installed on one side of the moving mold base (5). Multiple exhaust pipes (403) are fixedly connected to the bottom of the purge air passage (402). The exhaust pipes (403) are connected to an exhaust nozzle (404) at the end. The exhaust nozzle (404) is inserted and connected inside the exhaust passage (702).

5. The automotive lightweight plastic body arc bending manufacturing line according to claim 4, characterized in that, The diameter of the exhaust passage (702) is larger than that of the exhaust pipe (403) and the exhaust nozzle (404).

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