Fender injection molding device

Abstract

The invention belongs to the technical field of injection molding devices, and particularly relates to a fender injection molding device which comprises a machining platform, an injection molding machine is fixedly connected to the upper end of the machining platform, a lifting plate is arranged above the machining platform in a sliding mode, a fixed mold is fixedly connected to the lifting plate, and a movable mold is clamped to the fixed mold; the end, close to the injection molding machine, of the fixed mold is fixedly connected with a feeding hose communicating with the output end of the injection molding machine. And the adjustable vibration mechanism is arranged at the position, located below the lifting plate, of the machining platform and used for introducing vibration effects of different amplitudes in the injection molding process. By arranging the adjustable vibration mechanism, in the injection molding process of the fender, when molten plastic enters a thick or complex part, the vibration amplitude is increased, when the molten plastic enters a thin or simple part, the vibration amplitude is reduced, and the molten plastic is prevented from flowing too fast.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding devices, and in particular relates to a fender injection molding device. Background Art

[0002] Fenders are a key component of cars or other vehicles, usually located on both sides of the front and rear wheels of the car body. Their main function is to cover the wheels and protect the car body from splashing and impacts of external substances such as mud, water, and stones. At the same time, fenders also help improve aerodynamic performance and reduce wind resistance. They are usually made of metal or plastic materials. Modern cars mostly use injection-molded plastic fenders.

[0003] In the conventional fender injection molding process, it is necessary to first close the fixed mold and the movable mold, and then inject molten plastic into the mold. For example, a fender injection molding device disclosed in China Publication No. CN218803623U, however, still has the following technical problems during the injection molding process: Since the fender has a complex shape, especially it usually has curves, grooves, edges and multiple details, the molten plastic has a greater flow resistance when it flows to thicker or complex parts. The pressure and speed of the injection molding machine are insufficient, resulting in the plastic being unable to fully fill every corner of the area. When the molten plastic flows to thinner or simpler parts, its flow resistance is smaller, causing the molten plastic to flow too fast, resulting in local overfilling and even overflow. During the injection molding process, air or gas (such as water vapor, volatile substances, etc.) is easily trapped in the mold, resulting in the formation of bubbles, voids or surface defects during the molding process, thereby reducing the injection molding quality of the fender. Summary of the invention

[0004] The purpose of the present invention is to provide a fender injection molding device that can introduce vibration effect during the injection molding process to ensure that the molten plastic fully fills the mold in order to solve the problem raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A fender injection molding device, comprising: A processing platform, wherein the upper end of the processing platform is fixedly connected to an injection molding machine, a lifting plate is slidably arranged above the processing platform, a fixed mold is fixedly connected to the lifting plate, a movable mold is clamped on the fixed mold, and a feeding hose connected to the output end of the injection molding machine is fixedly connected to one end of the fixed mold close to the injection molding machine; An adjustable vibration mechanism is arranged on the processing platform at a position below the lifting plate, and is used for introducing vibration effects of different amplitudes during the injection molding process. The adjustable vibration mechanism includes two support plates fixedly connected to the upper end of the processing platform, a rotating drum is rotatably connected between the two support plates, and symmetrically arranged push plates are movably connected on both sides of the rotating drum. The push plates periodically resist and push the lifting plate to move upward, a slide groove is provided in the push plate, the rotating drum is movably connected in the slide groove, an adjusting groove is provided on the inner wall of the slide groove, an adjusting plate is fixedly connected to the rotating drum, and the adjusting plate is airtightly slidably connected to the inner wall of the adjusting groove, and a motor for driving the rotating drum is fixedly connected to the side walls of one of the support plates.

[0006] Preferably, four limit rods are fixedly connected to the upper end of the processing platform, and the lifting plate is slidably connected to the limit rods along the vertical direction.

[0007] Preferably, a side plate is fixedly connected to the upper end of the processing platform, an L-shaped plate is slidably connected to the side wall of the side plate, a hydraulic cylinder is fixedly connected to the L-shaped plate, and an output end of the hydraulic cylinder is fixedly connected to the movable mold.

[0008] Preferably, a control mechanism is provided in the feeding hose for automatically adjusting the vibration amplitude according to the injection molding area where the molten plastic is located. The control mechanism includes a control channel fixedly connected to the upper end of the processing platform, the control channel is connected to the inside of the feeding hose, a piston block is air-tightly slidably connected to the control channel, a first spring is provided between the piston block and the bottom wall of the control channel, a push rod is fixedly connected to the lower end of the piston block, a lever is rotatably connected to the top of the processing platform, a roller that contacts the lever is rotatably connected to the lower end of the push rod, a liquid storage cylinder is fixedly connected to the top of the processing platform, a piston plate is air-tightly slidably connected to the liquid storage cylinder, a second spring is provided between the piston plate and the top wall of the liquid storage cylinder, the piston plate contacts the lever, and an infusion tube that is connected to the inside of the rotating cylinder is fixedly connected to the upper end of the liquid storage cylinder.

[0009] Preferably, the length of the lever close to the push rod is three times the length of the lever away from the push rod.

[0010] Preferably, the adjustment plate is hollow, and the interior of the rotating cylinder is connected to the interior of the adjustment tank. A liquid storage space is formed between the liquid storage cylinder, the infusion tube, the interior of the rotating cylinder, the hollow position in the adjustment plate and the interior of the adjustment tank, and the liquid storage space is filled with hydraulic oil.

[0011] Preferably, an exhaust mechanism controlled by a push plate is provided above the processing platform, which is used for exhausting the inside of the mold in real time during the injection molding process, the exhaust mechanism includes an exhaust box fixedly connected to the upper end of the processing platform, an exhaust plate is airtightly and slidably connected to the exhaust box, a third spring is provided between the exhaust plate and the bottom wall of the exhaust box, an exhaust pipe connected to the outside world and an exhaust pipe connected to the inside of the fixed mold and the movable mold are provided in the exhaust box, a first one-way valve is provided inside the exhaust pipe and the exhaust pipe, an extension rod is fixedly connected to the upper end of the exhaust plate, the extension rod extends through and is fixedly connected to a transmission plate at a position above the exhaust box, a guide wheel is rotatably connected to a side wall of the push plate away from the adjusting groove through an L-shaped rod, and the guide wheel rolls in contact with the transmission plate.

[0012] Preferably, a heat preservation mechanism controlled by a lifting plate is provided above the processing platform, which is used for heat preservation treatment of molten plastic during the injection molding process. The heat preservation mechanism includes a liquid guide cavity opened in the fixed mold and the movable mold. The upper end of the processing platform is fixedly connected with a circulation box and a heating box. The circulation box is connected to one end of the liquid guide cavity by a first liquid guide tube, and the heating box is connected to the other end of the liquid guide cavity by a second liquid guide tube, and the circulation box and the heating box are connected by a third liquid guide tube. Both sides of the circulation box are air-tightly slidably connected with circulation blocks, and the part of the circulation block extending outside the circulation box is provided with a first hinge seat. The lower end of the lifting plate is provided with two second hinge seats, and a connecting rod is provided between the first hinge seat and the second hinge seat at the corresponding position, and a second one-way valve is provided in the first liquid guide tube and the third liquid guide tube.

[0013] Preferably, a circulation channel is formed among the liquid guiding cavity, the first liquid guiding tube, the circulation box, the third liquid guiding tube, the heating box and the second liquid guiding tube, and the circulation channel is filled with silicone oil.

[0014] Compared with the existing technology, the advantages of the fender injection molding device are: 1. The present invention provides an adjustable vibration mechanism. During the injection molding of the fender, the motor drives the drum to rotate, so that the fixed mold and the movable mold can perform reciprocating vertical displacement, and introduces the vibration effect during the injection molding process to ensure that the molten plastic fully fills the mold. When the molten plastic enters a thicker or more complex part, the adjustment plate on the drum extends a greater distance from the adjustment groove, thereby increasing the vibration amplitude and ensuring that the plastic can smoothly fill all details and complex parts. When the molten plastic enters a thinner or more simple part, the adjustment plate on the drum extends a less distance from the adjustment groove, thereby reducing the vibration amplitude and preventing the molten plastic from flowing too fast, causing local overfilling or even overflow.

[0015] 2. The present invention sets a control mechanism. When the molten plastic enters a thicker or more complex part, the complex area in the mold has a "reverse" effect on the flow, which slows down the flow rate of the molten plastic at the feeding hose, causing the molten plastic to accumulate in the feeding hose, pushing the longer side of the lever arm to move downward, causing the shorter side of the lever arm to move upward, and delivering the hydraulic oil to the adjusting groove, so that the adjusting plate can extend from the adjusting groove, automatically increasing the vibration amplitude of the lifting plate; when the molten plastic enters a thinner or more complex part, the piston block moves upward under the elastic force of the first spring, and the hydraulic oil in the adjusting groove re-enters the liquid storage cylinder, automatically reducing the vibration amplitude of the lifting plate, and automatically adjusting the vibration amplitude in real time according to the area where the molten plastic in the mold is located.

[0016] 3. The present invention sets an exhaust mechanism. During the injection molding process, when the rotating drum drives the push plate to rotate, the guide wheel on the push plate will reciprocate to push the transmission plate to move upward, so that the exhaust plate will reciprocate vertically, thereby continuously exhausting the air in the fixed mold and the movable mold, and can exhaust the inside of the mold in real time to avoid air or gas being trapped in the mold, preventing the formation of bubbles, cavities or surface defects.

[0017] 4. The present invention sets a heat preservation mechanism. During the injection molding process, the reciprocating movement of the lifting plate will also drive the circulation blocks on both sides of the circulation box to be pulled out reciprocally and pushed back into the circulation box reciprocally through the second hinged seat, the connecting rod and the first hinged seat. The inner wall of the mold cavity is heated by the circulating silicone oil to achieve heat preservation of the molten plastic, ensuring that the molten plastic will not cool and harden due to excessive injection time during the injection molding process, thereby ensuring the flow of the molten plastic in the mold, thereby improving the injection molding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the local structure of the adjustable vibration mechanism in the present invention; Figure 3 It is a partial cross-sectional view of the control mechanism in the present invention; Figure 4 is a partial cross-sectional view of the exhaust mechanism of the present invention; Figure 5 It is a schematic diagram of the local structure of the heat preservation mechanism in the present invention.

[0019] In the figure: 1. Processing platform; 11. Injection molding machine; 12. Lifting plate; 13. Fixed mold; 14. Moving mold; 15. Feeding hose; 2. Adjustable vibration mechanism; 21. Support plate; 22. Rotating drum; 23. Push plate; 24. Slide; 25. Adjustment slot; 26. Adjustment plate; 27. Motor; 3. Limit rod; 4. Side plate; 41. L-shaped plate; 42. Hydraulic cylinder; 5. Control mechanism; 51. Control channel; 52. Piston block; 53. First spring; 54. Push rod; 55. Lever; 56 , liquid storage cylinder; 57, piston plate; 58, second spring; 59, infusion tube; 6, exhaust mechanism; 61, exhaust box; 62, exhaust plate; 63, third spring; 64, exhaust pipe; 65, exhaust pipe; 66, extension rod; 67, transmission plate; 68, guide wheel; 7, insulation mechanism; 71, circulation box; 72, heating box; 73, first liquid guide tube; 74, second liquid guide tube; 75, third liquid guide tube; 76, circulation block; 77, first hinge seat; 78, second hinge seat; 79, connecting rod. DETAILED DESCRIPTION

[0020] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0021] Example: Refer to Figures 1 to 5 , a fender injection molding device, comprising: A processing platform 1, an injection molding machine 11 is fixedly connected to the upper end of the processing platform 1, a lifting plate 12 is slidably arranged above the processing platform 1, a fixed mold 13 is fixedly connected to the lifting plate 12, a movable mold 14 is clamped on the fixed mold 13, and a feeding hose 15 connected to the output end of the injection molding machine 11 is fixedly connected to the end of the fixed mold 13 close to the injection molding machine 11; Specifically, four limit rods 3 are fixedly connected to the upper end of the processing platform 1, and the lifting plate 12 is slidably connected to the limit rods 3 along the vertical direction. The width of the position below the lifting plate 12 on the limit rods 3 is greater than the width of the position above, so that the lifting plate 12 can only move down to the specified position.

[0022] Specifically, a side plate 4 is fixedly connected to the upper end of the processing platform 1, an L-shaped plate 41 is slidably connected to the side wall of the side plate 4, a hydraulic cylinder 42 is fixedly connected to the L-shaped plate 41, and the output end of the hydraulic cylinder 42 is fixedly connected to the movable mold 14. In the actual working process, the movable mold 14 is pushed close to the fixed mold 13 by the hydraulic cylinder 42, so that the movable mold 14 is clamped on the fixed mold 13. The clamping of the movable mold 14 and the fixed mold 13 is an existing mature technology and will not be repeated here. At the same time, in the process of the reciprocating movement of the lifting plate 12 in the vertical direction, it will not affect the injection of the molten plastic by the feeding hose 15.

[0023] The adjustable vibration mechanism 2 is arranged on the processing platform 1 at a position below the lifting plate 12, and is used to introduce vibration effects of different amplitudes during the injection molding process. The adjustable vibration mechanism 2 includes two support plates 21 fixedly connected to the upper end of the processing platform 1, and a rotating drum 22 is rotatably connected between the two support plates 21. Both sides of the rotating drum 22 are movably connected with symmetrically arranged push plates 23. The push plates 23 periodically resist and push the lifting plate 12 to move upward. A slide groove 24 is provided in the push plate 23, and the rotating drum 22 is movably connected in the slide groove 24. An adjusting groove 25 is provided on the inner wall of the slide groove 24. An adjusting plate 26 is fixedly connected to the rotating drum 22, and the adjusting plate 26 is airtightly slidably connected to the inner wall of the adjusting groove 25. A motor 27 for driving the rotating drum 22 is fixedly connected to the side walls of one of the support plates 21.

[0024] In view of the problem in the prior art that when the molten plastic flows to a thicker or more complex part, its flow resistance is relatively large, and the pressure and speed of the injection molding machine are insufficient, resulting in the inability of the plastic to completely fill every corner of the area, and when the molten plastic flows to a thinner or simpler part, its flow resistance is relatively small, resulting in the molten plastic easily flowing too fast, causing local overfilling, and even overflowing. In the present invention, an adjustable vibration mechanism 2 is provided. During the injection molding of the fender, the motor 27 drives the rotating drum 22 to rotate, so that the rotating drum 22 drives the push plate 23 to rotate, thereby reciprocatingly resisting and pushing the lifting plate 12 to move upward, and causing it to automatically fall under the action of gravity, so that the fixed mold 13 and the movable mold 14 can perform reciprocating vertical displacement. During the injection molding process The effect of vibration is introduced in the mold to ensure that the molten plastic fully fills the mold. When the molten plastic enters a thicker or more complex part, the adjusting plate 26 on the rotating drum 22 extends a greater distance from the adjusting groove 25, so that when the rotating drum 22 drives the push plate 23 to rotate, the push plate 23 pushes the lifting plate 12 to move upward, which increases the vibration amplitude when the flow resistance of the molten plastic is large, ensuring that the plastic can smoothly fill all details and complex parts. When the molten plastic enters a thinner or more simple part, the adjusting plate 26 on the rotating drum extends a less distance from the adjusting groove 25, and the push plate 23 pushes the lifting plate 12 to move upward, which reduces the vibration amplitude when the flow resistance of the molten plastic is large, thereby preventing the molten plastic from flowing too fast and causing local overfilling and overflow.

[0025] A control mechanism 5 is provided in the feeding hose 15 for automatically adjusting the vibration amplitude according to the injection molding area where the molten plastic is located. The control mechanism 5 includes a control channel 51 fixedly connected to the upper end of the processing platform 1, the control channel 51 is communicated with the inside of the feeding hose 15, a piston block 52 is airtightly slidably connected in the control channel 51, a first spring 53 is provided between the piston block 52 and the inner bottom wall of the control channel 51, a push rod 54 is fixedly connected to the lower end of the piston block 52, a lever 55 is rotatably connected above the processing platform 1, a roller that contacts the lever 55 is rotatably connected to the lower end of the push rod 54, a liquid storage cylinder 56 is fixedly connected above the processing platform 1, a piston plate 57 is airtightly slidably connected in the liquid storage cylinder 56, a second spring 58 is provided between the piston plate 57 and the inner top wall of the liquid storage cylinder 56, the piston plate 57 contacts the lever 55, and a liquid infusion tube 59 that communicates with the inside of the rotating cylinder 22 is fixedly connected to the upper end of the liquid storage cylinder 56.

[0026] Specifically, the length of the lever 55 on the side close to the push rod 54 is three times the length of the side away from the push rod 54, wherein, through the lever principle, the interaction between the accumulated molten plastic and the first spring 53 pushes the piston block to move downward, and the force applied to the side with the longer lever arm of the lever 55 is greater than when the push plate 23 contacts the lifting plate 12. The reaction force applied by the lifting plate 12 to the push plate 23 squeezes the hydraulic oil, and the hydraulic oil is further applied to the side with the shorter lever arm of the lever 55 through the piston plate 57. One third of the force can be ensured that when the push plate 23 pushes the lifting plate 12 to move, it will not affect the position of the lever 55 and the piston block 52, thereby ensuring the effect of regulating the vibration amplitude.

[0027] Specifically, the adjustment plate 26 is hollow, and the interior of the rotating cylinder 22 is connected to the interior of the adjustment groove 25. A liquid storage space is formed among the liquid storage cylinder 56, the infusion tube 59, the interior of the rotating cylinder 22, the hollow position in the adjustment plate 26, and the interior of the adjustment groove 25, and the liquid storage space is filled with hydraulic oil.

[0028] Specifically, the liquid infusion tube 59 and the rotating drum 22 are coaxially arranged, so that the rotation of the rotating drum 22 will not cause twisting of the liquid infusion tube 59, thereby ensuring that the liquid infusion tube 59 can transport the hydraulic oil.

[0029] In order to automatically adjust the vibration amplitude, the present invention can automatically adjust the vibration amplitude in real time according to the area where the molten plastic in the mold is located by setting a control mechanism 5. The specific adjustment process is as follows: When the molten plastic enters a thicker or more complex part, its flow resistance is greater. The "reverse" effect of the complex area in the mold on the flow will slow down the flow rate of the molten plastic at the feeding hose 15, causing the molten plastic to accumulate at the feeding hose 15. The accumulated molten plastic further overcomes the elastic force of the first spring 53, pushing the piston block 52 and the push rod 54 to move downward, pushing the side of the lever 55 with a longer force arm to move downward, causing the side of the lever 55 with a shorter force arm to move upward, thereby pushing the piston plate 57 to move upward in the liquid storage cylinder 56, and delivering the hydraulic oil in the liquid storage cylinder 56 to the rotating drum 22 through the liquid delivery pipe 59, and further entering the adjusting groove 25, so that the adjusting plate 26 can be extended from the adjusting groove 25, thereby automatically increasing the vibration amplitude of the lifting plate when the molten plastic enters a thicker or more complex part; When the molten plastic enters a thinner or simpler part, its flow resistance is smaller, and the molten plastic no longer accumulates in the feeding hose 15. The piston block 52 moves upward under the elastic force of the first spring 53, and the piston plate 57 moves downward under the elastic force of the second spring 58, so that the hydraulic oil in the adjusting groove 25 re-enters the liquid storage cylinder 56. When the molten plastic enters a thinner or simpler part, the vibration amplitude of the lifting plate 12 is automatically reduced. There is no need to set up additional adjustment components, which saves the driving source while ensuring that the vibration amplitude is always within an appropriate range when vibration is introduced during the injection molding process, further improving the filling effect of the molten plastic.

[0030] An exhaust mechanism 6 controlled by a push plate 23 is provided above the processing platform 1, and is used for exhausting the inside of the mold in real time during the injection molding process. The exhaust mechanism 6 includes an exhaust box 61 fixedly connected to the upper end of the processing platform 1, and an exhaust plate 62 is airtightly and slidably connected inside the exhaust box 61, and a third spring 63 is provided between the exhaust plate 62 and the inner bottom wall of the exhaust box 61. An exhaust pipe 64 connected to the outside world and an exhaust pipe 65 connected to the fixed mold 13 and the movable mold 14 are provided at a position above the exhaust plate 62 in the exhaust box 61. A first one-way valve is provided inside the exhaust pipe 64 and the exhaust pipe 65. An extension rod 66 is fixedly connected to the upper end of the exhaust plate 62, and the extension rod 66 extends through and extends to a position above the exhaust box 61 and is fixedly connected to a transmission plate 67. A guide wheel 68 is rotatably connected to a side wall of the push plate 23 away from the adjusting groove 25 through an L-shaped rod, and the guide wheel 68 rolls in contact with the transmission plate 67.

[0031] Specifically, the setting of the first one-way valve ensures that when the exhaust plate 62 performs reciprocating vertical displacement in the exhaust box 61, the air in the fixed mold 13 and the movable mold 14 can only be pumped into the exhaust box 61 through the exhaust pipe 65, and the air in the exhaust box 61 can only be discharged to the outside through the exhaust pipe 64, thereby ensuring the discharge of air inside the mold and avoiding air backflow.

[0032] In view of the problem in the prior art that air or gas (such as water vapor, volatile substances, etc.) is easily trapped in the mold, resulting in the formation of bubbles, voids or surface defects during the molding process, thereby reducing the injection molding quality of the fender, the present invention sets an exhaust mechanism 6. During the injection molding process, when the rotating drum 22 drives the push plate 23 to rotate, the guide wheel 68 on the push plate 23 will reciprocate to push the transmission plate 67 upward, so that the exhaust plate 62 reciprocates upward. Under the elastic force of the third spring 63, the exhaust plate 62 can reciprocate vertically, thereby continuously discharging the air in the fixed mold 13 and the movable mold 14, and can exhaust the inside of the mold in real time, avoiding air or gas from being trapped in the mold, and preventing the formation of bubbles, voids or surface defects.

[0033] In addition, since the guide wheel 68 is fixed to the side of the push plate 23 away from the adjustment groove 25, when the molten plastic flows to the area with greater resistance, the adjustment plate 26 extends from the adjustment groove 25, so that the drum 22 is close to the guide wheel 68, so that the amplitude of the upward displacement of the transmission plate 67 driven by the drum 22 in the process of driving the guide wheel 68 to rotate is reduced, so that the amplitude of the reciprocating movement of the exhaust plate 62 in the exhaust box 61 is reduced, and the exhaust rate of the air is reduced, so as to avoid the exhaust rate being too fast, resulting in the molten plastic flowing quickly in the mold under negative pressure conditions, causing incomplete filling, resulting in defects such as short shots and voids; On the contrary, when the molten plastic flows to an area with less resistance, the drum 22 moves away from the guide wheel 68. In the process of driving the guide wheel 68 to rotate, the drum 22 drives the transmission plate 67 to increase its upward displacement, thereby increasing the reciprocating movement of the exhaust plate 62 in the exhaust box 61, increasing the exhaust rate of air, and avoiding the exhaust rate being too slow, which makes the gas unable to be completely discharged, forming bubbles during the injection molding process, resulting in surface defects and pores in the molded parts, and further improving the injection molding quality of the fender.

[0034] A heat preservation mechanism 7 controlled by a lifting plate 12 is provided above the processing platform 1, and is used for heat preservation treatment of molten plastic during the injection molding process. The heat preservation mechanism 7 includes a liquid guide cavity opened in the fixed mold 13 and the movable mold 14. A circulation box 71 and a heating box 72 are fixedly connected to the upper end of the processing platform 1. The circulation box 71 is connected to one end of the liquid guide cavity by a first liquid guide pipe 73, and the heating box 72 is connected to the other end of the liquid guide cavity by a second liquid guide pipe 74, and a third liquid guide pipe 75 is connected between the circulation box 71 and the heating box 72. Both sides of the circulation box 71 are airtightly slidably connected with a circulation block 76, and the portion of the circulation block 76 extending outside the circulation box 71 is provided with a first hinge seat 77. The lower end of the lifting plate 12 is provided with two second hinge seats 78, and a connecting rod 79 is provided between the first hinge seat 77 and the corresponding second hinge seat 78. A second one-way valve is provided in the first liquid guide pipe 73 and the third liquid guide pipe 75.

[0035] Specifically, the second one-way valve has a similar function to the first one-way valve, and in order to prevent the silicone oil from flowing back during the circulation process, it will not be described in detail here.

[0036] Specifically, a circulation channel is formed between the liquid guiding cavity, the first liquid guiding tube 73, the circulation box 71, the third liquid guiding tube 75, the heating box 72 and the second liquid guiding tube 74, and the circulation channel is filled with silicone oil. The silicone oil here can also be replaced by other liquid media with high thermal conductivity, which is not limited here.

[0037] It is worth mentioning that the present invention sets a heat preservation mechanism 7. During the injection molding process, the reciprocating movement of the lifting plate 12 will also drive the circulation blocks 76 on both sides of the circulation box 71 to be pulled out reciprocally through the second hinge seat 78, the connecting rod 79 and the first hinge seat 77, and reciprocally push them back into the circulation box 71. The circulation box 71 continuously pumps the silicone oil in the liquid guide cavity into the circulation box 71 through the first liquid guide pipe 73, and continuously pumps the silicone oil in the circulation box 71 into the heating box 72 for heating treatment through the third liquid guide pipe 75. The silicone oil after heating treatment re-enters the liquid guide cavity through the second liquid guide pipe 74. Since silicone oil has a good heat conductive medium, the inner wall of the mold cavity can be heated by the circulating silicone oil, thereby realizing the heat preservation treatment of the molten plastic, ensuring that the molten plastic will not be cooled and hardened due to excessive injection time during the injection molding process, and ensuring the flow of the molten plastic in the mold, thereby improving the injection molding efficiency.

[0038] In addition, although the amplitude of the vertical displacement of the lifting plate 12 is different, when it pulls the circulation block 76, the circulation block 76 is always in the circulation box 71, and will not affect the circulation heating of the silicone oil and the insulation of the molten plastic.

[0039] The present invention can be explained by the following operation mode: The hydraulic cylinder 42 pushes the movable mold 14 close to the fixed mold 13, so that the movable mold 14 is clamped on the fixed mold 13, and the molten plastic is transported into the feeding hose 15 through the injection molding machine, so that the molten plastic further enters the mold cavity formed by the fixed mold 13 and the movable mold 14; The motor 27 drives the rotating drum 22 to rotate, so that the rotating drum 22 can drive the push plate 23 to rotate, thereby reciprocatingly resisting and pushing the lifting plate 12 to move upward, and causing it to automatically fall down under the action of gravity, so that the fixed mold 13 and the movable mold 14 can reciprocate vertically, introducing a vibration effect during the injection molding process to ensure that the molten plastic fully fills the mold; When the molten plastic enters a thicker or more complex part, its flow resistance is greater. The "reverse" effect of the complex area in the mold on the flow will slow down the flow rate of the molten plastic at the feeding hose 15, causing the molten plastic to accumulate at the feeding hose 15. The accumulated molten plastic further overcomes the elastic force of the first spring 53, pushing the piston block 52 and the push rod 54 to move downward, and pushing the piston plate 57 upward in the liquid storage cylinder 56 through the lever principle, and delivering the hydraulic oil to the adjustment groove 25, so that the adjustment plate 26 can be extended from the adjustment groove 25, and the vibration amplitude of the lifting plate is automatically increased. When the molten plastic enters a thinner or more simple part, its flow resistance is smaller, and the molten plastic is no longer accumulated at the feeding hose 15, so that the hydraulic oil in the adjustment groove 25 re-enters the liquid storage cylinder 56, and the vibration amplitude of the lifting plate 12 is automatically reduced; When the rotary drum 22 drives the push plate 23 to rotate, the guide wheel 68 on the push plate 23 reciprocates to push the transmission plate 67 upward, so that the exhaust plate 62 reciprocates upward. Under the elastic force of the third spring 63, the exhaust plate 62 reciprocates vertically, thereby continuously exhausting the air in the fixed mold 13 and the movable mold 14, and exhausting the inside of the mold in real time. The reciprocating movement of the lifting plate 12 will also drive the circulation blocks 76 on both sides of the circulation box 71 to be pulled out reciprocally and pushed back into the circulation box 71 reciprocally through the second hinged seat 78, the connecting rod 79 and the first hinged seat 77, thereby realizing the circulating heating treatment of the silicone oil, and further heating the inner wall of the mold cavity through the circulating silicone oil to achieve the heat preservation treatment of the molten plastic.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fender injection molding device, characterized in that: include: A processing platform (1), wherein the upper end of the processing platform (1) is fixedly connected to an injection molding machine (11), a lifting plate (12) is slidably arranged above the processing platform (1), a fixed mold (13) is fixedly connected to the lifting plate (12), a movable mold (14) is clamped on the fixed mold (13), and a feeding hose (15) connected to the output end of the injection molding machine (11) is fixedly connected to one end of the fixed mold (13) close to the injection molding machine (11); The adjustable vibration mechanism (2) is arranged on the processing platform (1) at a position below the lifting plate (12) and is used to introduce vibration effects of different amplitudes during the injection molding process. The adjustable vibration mechanism (2) comprises two support plates (21) fixedly connected to the upper end of the processing platform (1), a rotating cylinder (22) is rotatably connected between the two support plates (21), and symmetrically arranged push plates (23) are movably connected to the two sides of the rotating cylinder (22), and the push plates (23) periodically contact and push the rotating cylinder (22) to move the rotating cylinder (22) and ... The movable lifting plate (12) moves upward, a slide groove (24) is provided in the push plate (23), the rotating drum (22) is movably connected in the slide groove (24), an adjustment groove (25) is provided on the inner wall of the slide groove (24), an adjustment plate (26) is fixedly connected to the rotating drum (22), and the adjustment plate (26) is airtightly slidably connected to the inner wall of the adjustment groove (25), and a motor (27) for driving the rotating drum (22) is fixedly connected to the side wall of one of the support plates (21).

2. The fender injection molding device according to claim 1, characterized in that: Four limiting rods (3) are fixedly connected to the upper end of the processing platform (1), and the lifting plate (12) is slidably connected to the limiting rods (3) in a vertical direction.

3. The fender injection molding device according to claim 2, characterized in that: The upper end of the processing platform (1) is fixedly connected to a side plate (4), a side wall of the side plate (4) is slidably connected to an L-shaped plate (41), the L-shaped plate (41) is fixedly connected to a hydraulic cylinder (42), and an output end of the hydraulic cylinder (42) is fixedly connected to the movable mold (14).

4. The fender injection molding device according to claim 1, characterized in that: The feeding hose (15) is provided with a control mechanism (5) for automatically adjusting the vibration amplitude according to the injection molding area where the molten plastic is located. The control mechanism (5) comprises a control channel (51) fixedly connected to the upper end of the processing platform (1), the control channel (51) is communicated with the inside of the feeding hose (15), a piston block (52) is airtightly slidably connected to the inside of the control channel (51), a first spring (53) is provided between the piston block (52) and the inner bottom wall of the control channel (51), and a push rod (54) is fixedly connected to the lower end of the piston block (52). A lever (55) is rotatably connected to the top of the processing platform (1), and a roller that contacts the lever (55) is rotatably connected to the lower end of the push rod (54). A liquid storage cylinder (56) is fixedly connected to the top of the processing platform (1), and a piston plate (57) is airtightly slidably connected inside the liquid storage cylinder (56). A second spring (58) is provided between the piston plate (57) and the top wall of the liquid storage cylinder (56). The piston plate (57) contacts the lever (55), and the upper end of the liquid storage cylinder (56) is fixedly connected to a liquid infusion tube (59) that is connected to the inside of the rotating cylinder (22).

5. The fender injection molding device according to claim 4, characterized in that: The length of the side of the lever (55) close to the push rod (54) is three times the length of the side away from the push rod (54).

6. The fender injection molding device according to claim 4, characterized in that: The regulating plate (26) is hollow, and the interior of the rotating cylinder (22) is connected to the interior of the regulating groove (25). A liquid storage space is formed between the liquid storage cylinder (56), the liquid infusion tube (59), the interior of the rotating cylinder (22), the hollow position in the regulating plate (26), and the interior of the regulating groove (25), and the liquid storage space is filled with hydraulic oil.

7. The fender injection molding device according to claim 1, characterized in that: An exhaust mechanism (6) controlled by a push plate (23) is provided above the processing platform (1) for exhausting the inside of the mold in real time during the injection molding process. The exhaust mechanism (6) comprises an exhaust box (61) fixedly connected to the upper end of the processing platform (1), an exhaust plate (62) is airtightly slidably connected inside the exhaust box (61), a third spring (63) is provided between the exhaust plate (62) and the inner bottom wall of the exhaust box (61), and an exhaust pipe (64) connected to the outside is provided at a position above the exhaust plate (62) in the exhaust box (61) to exhaust air. and an exhaust pipe (65) connected to the interior of the fixed mold (13) and the movable mold (14); a first one-way valve is provided inside the exhaust pipe (64) and the exhaust pipe (65); an extension rod (66) is fixedly connected to the upper end of the exhaust plate (62); the extension rod (66) extends through and extends to a position above the exhaust box (61) and is fixedly connected to a transmission plate (67); a guide wheel (68) is rotatably connected to a side wall of the push plate (23) away from the adjustment groove (25) via an L-shaped rod; the guide wheel (68) rolls in contact with the transmission plate (67).

8. The fender injection molding device according to claim 1, characterized in that: A heat preservation mechanism (7) controlled by a lifting plate (12) is provided above the processing platform (1) for heat preservation of molten plastic during the injection molding process. The heat preservation mechanism (7) comprises a liquid guide cavity opened in the fixed mold (13) and the movable mold (14). A circulation box (71) and a heating box (72) are fixedly connected to the upper end of the processing platform (1). The circulation box (71) is connected to one end of the liquid guide cavity via a first liquid guide tube (73). The heating box (72) is connected to the other end of the liquid guide cavity via a second liquid guide tube (74). A third liquid guide tube (75) is connected between the ring box (71) and the heating box (72); circulation blocks (76) are airtightly slidably connected to both sides of the circulation box (71); a first hinge seat (77) is provided on the portion of the circulation block (76) extending outside the circulation box (71); two second hinge seats (78) are provided at the lower end of the lifting plate (12); a connecting rod (79) is provided between the first hinge seat (77) and the second hinge seat (78) at the corresponding position; and a second one-way valve is provided in the first liquid guide tube (73) and the third liquid guide tube (75).

9. The fender injection molding device according to claim 8, characterized in that: A circulation channel is formed between the liquid guiding cavity, the first liquid guiding tube (73), the circulation box (71), the third liquid guiding tube (75), the heating box (72) and the second liquid guiding tube (74), and the circulation channel is filled with silicone oil.

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