Injection molding device for automobile rubber part

Abstract

The invention discloses an automobile rubber part injection molding device, and relates to the technical field of injection molding, the automobile rubber part injection molding device comprises a lower mold, an upper mold is cooperatively arranged in a molding cavity of the lower mold, a feeding pipe and an air outlet hole are respectively arranged at the bottom end of the upper mold corresponding to the position of the molding cavity, and a ventilation cover is slidably arranged in the air outlet hole; and communicating pipes are arranged at the bottom ends of the lower molds in a communicating mode, a cooling assembly is arranged at the upper end of the bottom plate, demolding mechanisms are arranged in the first fixing pipes, and a limiting mechanism is arranged above the assembly plate. A communicating pipe and a backflow pipe are arranged on the lower molds, so that cooling liquid in the liquid storage tank flows in the multiple lower molds, cooling of rubber parts is accelerated, a first pushing rod is slidably arranged in a first fixing pipe, the first pushing rod can be pushed to move through liquid pressure, demolding is facilitated, and the demolding efficiency is improved. And a plurality of second pushing rods are arranged, so that the rubber part is conveniently prevented from being attached to the bottom end of the upper mold during demolding.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to an injection molding device for automobile rubber parts. Background Art

[0002] With the rapid development of the automobile industry, the demand for rubber parts in automobiles is also increasing, and the requirements of automobiles for rubber parts are also getting higher and higher. Automobile rubber parts are an indispensable part of automobile manufacturing. They play a key role in various systems and components of automobiles. Automobile rubber parts include sealing strips, anti-collision strips and decorative strips. When producing automobile rubber parts, injection molds are needed for production and processing. However, during production, the existing injection molding device requires the rubber parts to be cooled and formed, and then manually removed from the mold groove one by one. Due to the particularity of the rubber material, the rubber parts are easily adhered to the mold cavity during injection molding, so that when manually removing the parts, tools are needed to assist in removing the parts, which affects the efficiency during production.

[0003] The announcement number is: CN222115955U, which discloses an injection mold for the production of automotive rubber parts. By setting a base, a lower mold base, a fixed mold, a cavity and a moving part, the upward movement of the rack can drive the fixed gear to rotate, and the rotation of the fixed gear can drive the drive shaft and the second bevel gear to rotate, and then drive the first bevel gear and the screw to rotate, and then drive the drive plate and the drive rod to move upward, and then drive the stripping plate to move upward, so that the rubber part can be ejected. However, when the rubber part is injection molded, the upper mold and the lower mold need to be used in conjunction. After injection molding, the rubber part may be attached and tightly attached to the upper mold, so that after the upper mold is detached, the rubber part moves with the upper mold, resulting in poor demolding effect.

[0004] Based on this, a device for injection molding of automobile rubber parts is now provided, which can eliminate the disadvantages of the existing devices. Summary of the invention

[0005] The object of the present invention is to provide an injection molding device for automobile rubber parts, so as to solve the problem in the background art that it is inconvenient to separate the upper mold from the rubber part during demoulding.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An automobile rubber part injection molding device comprises a lower mold, a molding cavity is provided in the middle of the lower mold, the interior of the lower mold is hollow, a plurality of the lower molds are arranged in a rectangular array on the upper end of a mounting platform, a bottom plate is provided below the mounting platform, the mounting platform and the bottom plate are both fixedly arranged on a plurality of supporting legs, an upper mold is provided in the molding cavity of the lower mold, a plurality of the upper molds are fixedly arranged on the bottom end of an assembly plate, the assembly plate is respectively fixedly connected to the output ends of two second electric push rods, and the second electric push rods are fixedly arranged on the bottom plate The bottom end of the upper mold is provided with a feed pipe and an air outlet at positions corresponding to the molding cavity, a breathable cover is slidably provided in the air outlet, an air outlet pipe is provided at the assembly plate corresponding to the position of the air outlet, the bottom end of the lower mold is connected with a connecting pipe, several input ends of the connecting pipes are connected with the cooling component at the upper end of the bottom plate, the bottom end of the molding cavity is symmetrically connected with a first fixed pipe, the inside of the first fixed pipe is provided with a demoulding mechanism for facilitating demoulding of the molding cavity, and a limiting mechanism for preventing the rubber part from being tightly attached to the upper mold is provided above the assembly plate.

[0008] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0009] In an optional scheme: the cooling component includes a water pump, the water pump is fixed on the upper end of the base plate, the water pump input end is connected to the inside of the liquid storage tank, the liquid storage tank is fixed on the upper end of the base plate, a plurality of semiconductor refrigeration plates are fixed on the outside of the liquid storage tank, a plurality of heat dissipation fins are fixed on the cooling end of the semiconductor refrigeration plate, one end of the heat dissipation fin extends to the inside of the liquid storage tank, the water pump output end is connected to the diversion pipe rack, a plurality of connecting pipe input ends are respectively connected to a plurality of output ends of the diversion pipe rack, a plurality of lower molds are connected on one side with a return pipe, the other end of the return pipe on the same side is connected to the first collecting pipe, the two collecting pipes are connected to the liquid storage tank, and the collecting pipes are fixed at the bottom of the mounting table.

[0010] In an optional solution: overflow weirs are provided inside the liquid storage tank at positions corresponding to one side of a plurality of semiconductor refrigeration plates, and the cross-section of the overflow weir is arranged in a right-angled triangle.

[0011] In an optional scheme: the demolding mechanism includes a first push rod, two first fixed tubes at the bottom end of the molding cavity are both slidably provided with a first push rod, one end of the first push rod is at the same height as the bottom end of the molding cavity, a first return spring is provided between the other end of the first push rod and one end inside the first fixed tube, the two first fixed tubes are connected to the connecting tube, one end of the first push rod is fixedly provided with a limit clamping plate, one side of the limit clamping plate is provided with a limit hole, a limit column is inserted in the limit hole, the limit column is fixedly provided at one end of the sliding rod, a second fixed tube is slidably provided on the sliding rod, the second fixed tube is fixedly provided on one side of the first fixed tube, a circular plate is fixedly provided on the sliding rod, the circular plate is slidably provided in the second fixed tube, a second return spring is provided between one side of the circular plate and one end of the second fixed tube, and a sliding clamping plate is provided at one side of the limit clamping plate corresponding to the position of the limit hole. The cam is an assembly made of a plurality of sliding plates, each of which has a first end fixedly mounted on the front of the sliding plate and a second end of the sliding plate, the second end of the sliding plate being connected to a plurality of movable plates, each of which has a plurality of movable plates.

[0012] In an optional solution: the drainage assembly includes a drainage pipe, the connecting pipe is connected to a drainage pipe, the drainage pipe is located below the baffle, the two coaxial drainage pipes are respectively connected to the input ends on both sides of the electromagnetic valve, the output ends of the electromagnetic valves are connected to the second collecting pipe, the second collecting pipe is connected to the liquid storage tank, and the electromagnetic valves are electrically connected to the control box.

[0013] In an optional scheme: the limiting mechanism includes a second push rod, four sliding holes are provided in a circular array at the bottom end of the upper mold corresponding to the position of the molding cavity, the second push rods are slidably provided in the sliding holes, and several of the second push rods are fixed at the bottom end of the mounting plate, and circular through holes are provided at the bottom end of the mounting plate corresponding to the positions of the feed pipe and the air outlet pipe, positioning holes are provided on both sides of the mounting plate, and limiting sliders are slidably provided in the positioning holes, and a third return spring is provided between one end of the limiting slider and one side of the positioning hole, a limiting plate is fixedly provided at the upper end of the bottom plate corresponding to the position of the limiting slider, a limiting hole is provided on one side of the limiting plate and at the working height of the limiting slider, and a pushing component for releasing the fixing of the limiting slider is provided inside the mounting plate.

[0014] In an optional solution: the pushing assembly includes a second connecting rod, a pull rod is fixedly provided at one end of the limit sliding block, a second connecting rod is hingedly provided at one end of the pull rod, the other ends of the two second connecting rods on the same side are hingedly connected to the two ends of the hinge rod respectively, a top rod is fixedly provided at the bottom end of the hinge rod, and one end of the top rod extends to the outside of the mounting plate.

[0015] In an optional scheme: a clearing rod is provided inside the air hood at a position coaxial with the exhaust hole, a limit frame is slidably provided at one end of the clearing rod, the limit frame is fixed at the bottom end of the air hood, a first connecting rod is hinged at one end of the clearing rod, the other end of the first connecting rod is hingedly connected to the hinge frame, the hinge frame is fixed at the output end of the spring telescopic rod, the spring telescopic rod is fixed at the bottom end of the air hood, a fixing rod is provided above the mounting plate at a position corresponding to the position of the hinge frame, the fixing rod is fixed on the mounting frame, and the mounting frame is fixed on the upper end of the mounting platform.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The present invention has a hollow interior of the lower mold, and provides a connecting pipe and a reflux pipe on the lower mold, so that the coolant in the liquid storage tank flows inside the plurality of lower molds, so as to accelerate the cooling of the rubber parts. The first push rod is slidably provided inside the first fixed tube, so that the first push rod can be pushed to move by liquid pressure, so that the first push rod can push the rubber parts inside the molding cavity, so as to facilitate demolding. In addition, a mounting plate is provided above the assembly plate, and a plurality of second push rods are provided at the bottom end of the mounting plate corresponding to the molding cavity position, so that when demolding, the upper mold is first away from the rubber parts. During the movement of the upper mold, the second push rod always fixes the rubber parts, so as to prevent the rubber parts from adhering to the bottom end of the upper mold, thereby increasing the practicality of the injection molding device for automobile rubber parts.

[0018] 2. The present invention provides a ventilation cover that slides at the position corresponding to the position of the air outlet, so that the air inside the molding cavity can be discharged during injection molding. At the same time, after the rubber liquid inside the molding cavity is filled, the air outlet can be automatically closed. At the same time, a clearing rod is provided inside the ventilation cover, so that when the assembly plate drives the ventilation cover to move to the initial position, the fixed rod can push the clearing rod to move through the hinge frame and the first connecting rod, so that the exhaust hole can be cleaned, thereby preventing the exhaust hole from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the fixing rod structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the internal structure of the liquid storage tank of the present invention.

[0022] Figure 4 This is a schematic diagram of the lower mold structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the limiting clamping plate of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the breathable cover of the present invention.

[0025] Figure 7 This is a schematic diagram of the installation of the limit slider of the present invention.

[0026] Notes on figure numbers: 11 lower mold, 12 mounting table, 13 bottom plate, 14 connecting pipe, 15 water pump, 16 liquid storage tank, 17 overflow weir, 18 semiconductor refrigeration plate, 19 reflux pipe, 20 first fixed pipe, 21 first push rod, 22 first return spring, 23 limit card plate, 24 limit column, 25 sliding rod, 26 second return spring, 27 baffle, 28 first electric push rod, 29 electromagnetic valve, 30 upper mold, 31 assembly plate, 32 second electric push rod, 33 feed pipe, 34 air outlet pipe, 35 breathable cover, 36 dredging rod, 37 first connecting rod, 38 spring telescopic rod, 39 fixed rod, 40 second push rod, 41 mounting plate, 42 limit slider, 43 third return spring, 44 second connecting rod, 45 limit plate, 46 control box. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] Example 1

[0029] In one embodiment, Figure 1-Figure 7As shown, an automobile rubber part injection molding device comprises a lower mold 11, a molding cavity is provided in the middle of the lower mold 11, the interior of the lower mold 11 is hollow, a plurality of the lower molds 11 are arranged in a rectangular array at the upper end of a mounting platform 12, a bottom plate 13 is provided below the mounting platform 12, the mounting platform 12 and the bottom plate 13 are both fixedly arranged on a plurality of supporting legs, an upper mold 30 is provided in the molding cavity of the lower mold 11, a plurality of the upper molds 30 are fixedly arranged at the bottom end of an assembly plate 31, the assembly plate 31 is respectively fixedly connected to the output ends of two second electric push rods 32, the second electric push rods 32 are fixedly arranged at the upper end of the bottom plate 13, and the bottom end of the upper mold 30 corresponds to the molding cavity position. A feed pipe 33 and an air outlet are respectively provided, a vent cover 35 is slidably provided in the air outlet, an air outlet pipe 34 is provided at the position of the assembly plate 31 corresponding to the air outlet, a connecting pipe 14 is connected to the bottom end of the lower mold 11, and several input ends of the connecting pipes 14 are connected to the cooling assembly at the upper end of the bottom plate 13, and the bottom end of the molding cavity is symmetrically connected to the first fixed pipe 20, and a demoulding mechanism is provided inside the first fixed pipe 20 to facilitate demoulding of the molding cavity, and a limiting mechanism for preventing the rubber part from being tightly attached to the upper mold 30 is provided above the assembly plate 31, and the demoulding mechanism facilitates demoulding of the rubber part, and the limiting mechanism facilitates fixing the rubber part during demoulding to prevent the rubber part from adhering to the bottom end of the upper mold 30;

[0030] The cooling component includes a water pump 15, which is fixed on the upper end of the bottom plate 13, and the input end of the water pump 15 is connected to the inside of a liquid storage tank 16, and the liquid storage tank 16 is fixed on the upper end of the bottom plate 13. A plurality of semiconductor refrigeration sheets 18 are fixed on the outside of the liquid storage tank 16, and a plurality of heat dissipation fins are fixed on the cooling end of the semiconductor refrigeration sheet 18. One end of the heat dissipation fin extends to the inside of the liquid storage tank 16, and the output end of the water pump 15 is connected to a shunt pipe rack. The input ends are respectively connected to several output ends of the manifold frame, and one side of several lower molds 11 is connected with a return pipe 19, and the other end of the return pipe 19 on the same side is connected to the first collecting pipe, and the two collecting pipes are connected to the liquid storage tank 16. The collecting pipes are fixed at the bottom of the mounting table 12. When in use, when the rubber part needs to be injection molded, the second electric push rod 32 is started, and the output end of the second electric push rod 32 drives the assembly plate 31 to move, so that the assembly plate 31 drives several upper molds 3 0 moves, the upper mold 30 moves into the molding cavity, and then the external feeding component adds rubber liquid into the molding cavity through the feeding pipe 33. During the process of adding rubber liquid, the air inside the molding cavity is exhausted through the outside of the breathable cover 35. When the rubber liquid inside the molding cavity is about to be filled, the rubber liquid squeezes the breathable cover 35, so that the breathable cover 35 slides into the air outlet, so that the bottom end of the breathable cover 35 and the bottom end of the upper mold 30 are at the same height. Due to the high viscosity of the rubber liquid, it cannot be discharged through the exhaust hole. After the injection molding is completed, the water pump 15 is started, and the water pump 15 extracts the cooled liquid inside the liquid storage tank 16, and transports the liquid to the inside of several connecting pipes 14 through the diversion pipe rack. Then the connecting pipe 14 transports the liquid to the inside of the lower mold 11, so that the rubber parts inside the molding cavity are cooled. Then the liquid that absorbs heat flows back to the inside of the first collecting pipe through the reflux pipe 19. The first collecting pipe discharges the liquid back into the liquid storage tank 16 and re-cools it through the semiconductor refrigeration sheet 18.

[0031] Overflow weirs 17 are provided inside the liquid storage tank 16 at positions corresponding to one side of several semiconductor refrigeration plates 18. The cross-section of the overflow weir 17 is a right-angled triangle, which is convenient for increasing the cooling time of the semiconductor refrigeration plates 18 for the liquid when in use.

[0032] The demoulding mechanism includes a first push rod 21, and the first push rod 21 is slidably provided inside the two first fixed tubes 20 at the bottom end of the molding cavity. One end of the first push rod 21 is at the same height as the bottom end of the molding cavity, and a first return spring 22 is provided between the other end of the first push rod 21 and one end inside the first fixed tube 20. The two first fixed tubes 20 are connected with the connecting tube 14, and one end of the first push rod 21 is fixedly provided with a limiting clamping plate 23, and a limiting hole is provided on one side of the limiting clamping plate 23. A limiting column 24 is inserted in the limiting hole, and the limiting column 24 is fixedly provided at one end of a sliding rod 25. A second fixed tube is slidably provided on the sliding rod 25, and the second fixed tube is fixedly provided on the first fixed tube 20 side, a circular plate is fixed on the sliding rod 25, and the circular plate is slidably arranged inside the second fixed tube. A second return spring 26 is arranged between one side of the circular plate and one end of the second fixed tube. A sliding groove is arranged on one side of the limiting card plate 23 at a position corresponding to the position of the limiting hole. The diameter of the limiting hole is larger than the width of the sliding groove. The cross-sectional diameter of the limiting column 24 is larger than the width of the sliding groove. The cross-sectional diameter of the sliding rod 25 is smaller than the width of the sliding groove. A push frame is fixed on one end of the sliding rod 25. A guide slide bar is slidably arranged on the push frame. The guide slide bar is fixed on the first fixed tube 20. A sealing tube is connected to the connecting tube 14. A baffle 27 is slidably arranged inside the sealing tube. The baffle 27 A first fixed plate is fixedly provided at a position corresponding to the position of the push frame on one side, and the baffle plate 27 on the same side is fixedly provided on one side of a linkage plate, and the linkage plate is fixedly provided on the output end of the first electric push rod 28, and the first electric push rod 28 is fixedly provided at the bottom end of the mounting table 12, and the first electric push rod 28 is electrically connected to the control box 46, and the control box 46 is fixedly provided on one side of the fixed vertical plate, and the fixed vertical plate is fixedly provided on one side of the mounting table 12 and the bottom plate 13. When in use, when the rubber part is cooled and needs to be demoulded, the second electric push rod 32 drives the assembly plate 31 to move, so that the upper mold 30 is away from the rubber part, and then the two first electric push rods 28 are controlled to start through the control box 46, and the output end of the first electric push rod 28 is brought by the linkage plate Move several baffles 27 to slide, and when the baffle 27 completely closes one end of the connecting pipe 14, the first fixed plates on both sides of the baffle 27 push the pushing frame to move, and the pushing frame drives the limiting column 24 to move through the sliding rod 25, so that the limiting column 24 is out of the limiting hole, and then when the water pump 15 transports liquid to the inside of the connecting pipe 14, since the baffle 27 closes one end of the connecting pipe 14, the liquid cannot enter the lower mold 11, and as the internal pressure of the connecting pipe 14 increases, the first pushing rod 21 is pushed to slide inside the first fixed tube 20, so that one end of the first pushing rod 21 is extended, so as to push the rubber part inside the molding cavity out, and one end of the connecting pipe 14 is provided with a drainage component for the first pushing rod 21 to return to its initial position.

[0033] The drainage assembly includes a drainage pipe, and the connecting pipe 14 is connected with a drainage pipe, and the drainage pipe is located below the baffle 27. The two coaxial drainage pipes are respectively connected to the input ends of the electromagnetic valve 29 on both sides, and the output ends of the electromagnetic valve 29 are connected to the second collecting pipe, and the second collecting pipe is connected to the liquid storage tank 16. The electromagnetic valves 29 are electrically connected to the control box 46. When in use, when the rubber part is removed, the water pump 15 stops working, and the output end of the electromagnetic valve 29 is controlled by the control box 46 to open, so that The liquid inside the first fixed tube 20 is discharged into the second liquid collecting tube, and then the liquid flows back into the liquid storage tank 16. When the internal pressure of the first fixed tube 20 decreases, under the action of the first return spring 22, the first push rod 21 returns to its initial position, and the sliding rod 25 slides into the sliding groove. Then, the output end of the first electric push rod 28 drives the baffle 27 back to its initial position. Under the action of the second return spring 26, the limit column 24 is reinserted into the limit hole to fix the first push rod 21.

[0034] The limiting mechanism includes a second push rod 40, and four sliding holes are provided in a circular array at the bottom end of the upper mold 30 corresponding to the position of the molding cavity. The second push rods 40 are slidably provided in the sliding holes, and several of the second push rods 40 are fixedly arranged at the bottom end of the mounting plate 41. The bottom end of the mounting plate 41 is provided with circular through holes corresponding to the positions of the feed pipe 33 and the air outlet pipe 34. Positioning holes are provided on both sides of the mounting plate 41, and limiting sliders 42 are slidably provided in the positioning holes. A third reset spring 43 is provided between one end of the limiting slider 42 and one side of the positioning hole. A limiting plate 45 is fixedly provided at the upper end of the bottom plate 13 corresponding to the position of the limiting slider 42. A limiting hole is provided on one side of the limiting plate 45 and at the working height of the limiting slider 42. When in use, when the rubber part needs to be injection molded, the first The second electric push rod 32 drives the assembly plate 31 to move. At this time, the bottom end of the mounting plate 41 is tightly attached to the upper end of the assembly plate 31, and the mounting plate 41 moves with the assembly plate 31. When the mounting plate 41 moves to one end of the limit plate 45, the limit plate 45 guides the limit slider 42 so that the limit slider 42 slides into the positioning hole. Then, when the limit slider 42 moves to the position of the limit hole, under the action of the third return spring 43, one end of the limit slider 42 is inserted into the limit hole to fix the position of the mounting plate 41. At the same time, the assembly plate 31 continues to move. When the assembly plate 31 is tightly attached to the upper end of the lower mold 11, the assembly plate 31 stops moving. At this time, one end of the second push rod 40 is at the same height as the bottom end of the upper mold 30. A pushing component for releasing the fixation of the limit slider 42 is provided inside the mounting plate 41.

[0035] The push assembly includes a second connecting rod 44, one end of the limit slider 42 is fixed with a pull rod, one end of the pull rod is hinged with a second connecting rod 44, the other ends of the two second connecting rods 44 on the same side are hingedly connected to the two ends of the hinge rod, the bottom end of the hinge rod is fixed with a push rod, one end of the push rod extends to the outside of the mounting plate 41, when in use, when demoulding is required, the output end of the second electric push rod 32 drives the assembly plate 31 to move, so that the assembly plate 31 rises, and at the same time, the upper end of the assembly plate 31 squeezes the push rod, so that the push rod pushes the hinge rod to move, and the hinge rod is The chain rod drives the limit slider 42 to move through the mounting plate 41, so that the limit slider 42 moves to the inside of the positioning hole. At this time, the upper mold 30 gradually moves away from the rubber part, but the second push rod 40 is always in close contact with the rubber part to prevent the rubber part from adhering to the bottom end of the upper mold 30. When the upper end of the assembly plate 31 is in close contact with the bottom end of the mounting plate 41, the limit slider 42 disengages from the limit plate 45, so that the mounting plate 41 moves, thereby making the second push rod 40 away from the rubber part. It is worth noting that the contact area between the second push rod 40 and the rubber part is relatively small, and the figure is only a schematic diagram.

[0036] Example 2

[0037] The difference from Example 1 is that: a dredging rod 36 is provided inside the air vent 35 at a position coaxial with the exhaust hole, one end of the dredging rod 36 is slidably provided with a limit frame, the limit frame is fixedly arranged at the bottom end of the air vent 35, one end of the dredging rod 36 is hinged with a first connecting rod 37, the other end of the first connecting rod 37 is hingedly connected to the hinge frame, the hinge frame is fixedly arranged at the output end of the spring telescopic rod 38, the spring telescopic rod 38 is fixedly arranged at the bottom end of the air vent 35, and the mounting plate A fixing rod 39 is provided at the position corresponding to the hinge frame above 41, and the fixing rod 39 is fixed on the mounting frame, and the mounting frame is fixed on the upper end of the mounting platform 12. When in use, when the air hood 35 follows the upper mold 30 to move to the initial position, one end of the fixing rod 39 squeezes the hinge frame, so that the output end of the spring telescopic rod 38 is compressed, and the hinge frame pushes the clearing rod 36 to slide through the first connecting rod 37, so that the clearing rod 36 cleans the rubber remaining in the exhaust hole to prevent the exhaust hole from being blocked.

[0038] The above embodiment discloses an injection molding device for automobile rubber parts, wherein when the rubber parts are injection molded, the second electric push rod 32 is started, and the output end of the second electric push rod 32 drives the assembly plate 31 to move. At this time, the bottom end of the mounting plate 41 is tightly attached to the upper end of the assembly plate 31, and the mounting plate 41 moves with the assembly plate 31. When the mounting plate 41 moves to one end of the limiting plate 45, the limiting plate 45 guides the limiting slider 42 so that the limiting slider 42 slides into the positioning hole. Then, when the limiting slider 42 moves to the position of the limiting hole, under the action of the third reset spring 43, one end of the limiting slider 42 is inserted into the limiting hole, so that the position of the mounting plate 41 is fixed. At the same time, the assembly plate 31 continues to move. When the assembly plate 31 and the upper end of the lower mold 11 are in contact, the mounting plate 41 moves with the assembly plate 31. When the upper mold 30 is in close contact, the assembly plate 31 stops moving. At this time, one end of the second push rod 40 is at the same height as the bottom end of the upper mold 30. The upper mold 30 moves into the molding cavity. Then, the external feeding component adds rubber liquid into the molding cavity through the feeding pipe 33. During the process of adding rubber liquid, the air inside the molding cavity is exhausted through the outside of the breathable cover 35. When the rubber liquid inside the molding cavity is about to be filled, the rubber liquid squeezes the breathable cover 35, causing the breathable cover 35 to slide into the air outlet, so that the bottom end of the breathable cover 35 is at the same height as the bottom end of the upper mold 30. Since the viscosity of the rubber liquid is relatively large, it cannot be discharged through the exhaust hole. After the injection molding is completed, the water pump 15 is started, and the water pump 15 extracts the cooled liquid inside the liquid storage tank 16, so that the rubber liquid inside the molding cavity is When the rubber part is cooled and needs to be demoulded, the output end of the second electric push rod 32 drives the assembly plate 31 to move, so that the assembly plate 31 rises. At the same time, the upper end of the assembly plate 31 squeezes the push rod, so that the push rod pushes the hinge rod to move. The hinge rod drives the limit slider 42 to move through the mounting plate 41, so that the limit slider 42 moves to the inside of the positioning hole. At this time, the upper mold 30 gradually moves away from the rubber part, but the second push rod 40 is always in close contact with the rubber part to prevent the rubber part from adhering to the bottom end of the upper mold 30. When the upper end of the assembly plate 31 is in close contact with the bottom end of the mounting plate 41, the limit slider 42 is separated from the limit plate 45, so that the mounting plate 41 moves, thereby making the second push rod 40 away from the rubber part. Then the second electric push rod 32 drives the assembly plate 31 to move. The upper mold 30 is away from the rubber part, and then the two first electric push rods 28 are controlled to start through the control box 46. The output end of the first electric push rod 28 drives a plurality of baffles 27 to slide through the linkage plate. When the baffle 27 completely closes one end of the connecting pipe 14, the first fixed plates on both sides of the baffle 27 push the push frame to move. The push frame drives the limit column 24 to move through the sliding rod 25, so that the limit column 24 is out of the limit hole. Then, when the water pump 15 transports liquid to the inside of the connecting pipe 14, the baffle 27 closes one end of the connecting pipe 14, so that the liquid cannot enter the lower mold 11. As the internal pressure of the connecting pipe 14 increases, the first push rod 21 is pushed to slide inside the first fixed pipe 20, so that one end of the first push rod 21 extends.Thus, the rubber part inside the molding cavity is pushed out. When the breathable cover 35 moves to the initial position following the upper mold 30, one end of the fixed rod 39 squeezes the hinge frame, so that the output end of the spring telescopic rod 38 is compressed. The hinge frame pushes the dredging rod 36 to slide through the first connecting rod 37, so that the dredging rod 36 cleans the residual rubber in the exhaust hole to prevent the exhaust hole from being blocked.

[0039] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An injection molding device for automobile rubber parts, comprising a lower mold (11), a molding cavity is provided in the middle of the lower mold (11), the interior of the lower mold (11) is hollow, a plurality of the lower molds (11) are arranged in a rectangular array on the upper end of a mounting platform (12), a bottom plate (13) is provided below the mounting platform (12), the mounting platform (12) and the bottom plate (13) are both fixedly arranged on a plurality of supporting legs, an upper mold (30) is provided in the molding cavity of the lower mold (11), a plurality of the upper molds (30) are fixedly arranged on the bottom end of an assembly plate (31), the assembly plate (31) is respectively fixedly connected to the output ends of two second electric push rods (32), the second electric push rods (32) are fixedly arranged on the upper end of the bottom plate (13), a feed pipe (33) and an air outlet are respectively provided at the bottom end of the upper mold (30) corresponding to the molding cavity position, characterized in that: A vent cover (35) is slidably provided in the air outlet hole, an air outlet pipe (34) is provided at a position corresponding to the position of the air outlet hole on the assembly plate (31), a connecting pipe (14) is connected to the bottom end of the lower mold (11), and input ends of a plurality of the connecting pipes (14) are connected to a cooling component at the upper end of the bottom plate (13), a first fixed pipe (20) is symmetrically connected to the bottom end of the molding cavity, a demoulding mechanism is provided inside the first fixed pipe (20) to facilitate demoulding of the molding cavity, and a limiting mechanism is provided above the assembly plate (31) to prevent the rubber part from being tightly attached to the upper mold (30).

2. The automotive rubber part injection molding device according to claim 1, characterized in that: The cooling component comprises a water pump (15), the water pump (15) is fixedly arranged at the upper end of the bottom plate (13), the input end of the water pump (15) is connected to the inside of a liquid storage tank (16), the liquid storage tank (16) is fixedly arranged at the upper end of the bottom plate (13), a plurality of semiconductor refrigeration sheets (18) are fixedly arranged on the outside of the liquid storage tank (16), a plurality of heat dissipation fins are fixedly arranged at the cooling end of the semiconductor refrigeration sheet (18), one end of the heat dissipation fins extends to the inside of the liquid storage tank (16), the output end of the water pump (15) is connected to a branch pipe rack, the input ends of a plurality of the connecting pipes (14) are respectively connected to a plurality of output ends of the branch pipe rack, a plurality of the lower molds (11) are connected to a return pipe (19) on one side, the other end of the return pipe (19) on the same side is connected to a first collecting pipe, the two collecting pipes are connected to the liquid storage tank (16), and the collecting pipes are fixedly arranged at the bottom end of the mounting platform (12).

3. The automotive rubber part injection molding device according to claim 2, characterized in that: Overflow weirs (17) are provided inside the liquid storage tank (16) at positions corresponding to one side of a plurality of semiconductor cooling sheets (18), and the cross section of the overflow weir (17) is arranged in the shape of a right triangle.

4. The automotive rubber part injection molding device according to claim 3, characterized in that: The demoulding mechanism comprises a first push rod (21), the first push rod (21) is slidably arranged inside the two first fixed tubes (20) at the bottom end of the molding cavity, one end of the first push rod (21) is at the same height as the bottom end of the molding cavity, a first return spring (22) is arranged between the other end of the first push rod (21) and one end inside the first fixed tube (20), the two first fixed tubes (20) are connected to the connecting tube (14), one end of the first push rod (21) is fixedly provided with a limit clamp (23), and the limit clamp ( A limiting hole is provided on one side of the slide rod (23), a limiting column (24) is inserted in the limiting hole, the limiting column (24) is fixedly arranged at one end of the sliding rod (25), a second fixing tube is slidably arranged on the sliding rod (25), the second fixing tube is fixedly arranged on one side of the first fixing tube (20), a circular plate is fixedly arranged on the sliding rod (25), the circular plate is slidably arranged inside the second fixing tube, a second return spring (26) is provided between one side of the circular plate and one end of the second fixing tube, a sliding spring (26) is provided on one side of the limiting clamping plate (23) at a position corresponding to the limiting hole, and a second fixing tube (26) is provided on one side of the limiting clamping plate (23) at a position corresponding to the limiting hole. The diameter of the limiting hole is larger than the width of the sliding groove, the cross-sectional diameter of the limiting column (24) is larger than the width of the sliding groove, the cross-sectional diameter of the sliding rod (25) is smaller than the width of the sliding groove, one end of the sliding rod (25) is fixed with a push frame, a guide slide bar is slidably provided on the push frame, the guide slide bar is fixed on the first fixed tube (20), the connecting tube (14) is connected with a sealing tube, a baffle (27) is slidably provided inside the sealing tube, and a first fixed tube is fixed at one side of the baffle (27) corresponding to the position of the push frame. The baffle plate (27) on the same side is fixedly arranged on one side of a linkage plate, the linkage plate is fixedly arranged on the output end of the first electric push rod (28), the first electric push rod (28) is fixedly arranged on the bottom end of the mounting platform (12), the first electric push rod (28) is electrically connected to the control box (46), the control box (46) is fixedly arranged on one side of the fixed vertical plate, the fixed vertical plate is fixedly arranged on one side of the mounting platform (12) and the bottom plate (13), and one end of the connecting pipe (14) is provided with a drainage component for returning the first push rod (21) to the initial position.

5. The automotive rubber part injection molding device according to claim 4, characterized in that: The drainage assembly comprises a drainage pipe, and the connecting pipe (14) is connected to a drainage pipe, and the drainage pipe is located below the baffle (27). The two coaxial drainage pipes are respectively connected to the input ends on both sides of the electromagnetic valve (29), and the output ends of the electromagnetic valve (29) are connected to the second collecting pipe, and the second collecting pipe is connected to the liquid storage tank (16). The electromagnetic valves (29) are electrically connected to the control box (46).

6. The automotive rubber part injection molding device according to claim 1, characterized in that: The limiting mechanism comprises a second push rod (40), four sliding holes are provided in a circular array at the bottom end of the upper mold (30) corresponding to the position of the molding cavity, and the second push rods (40) are slidably provided in the sliding holes. Several of the second push rods (40) are fixedly arranged at the bottom end of the mounting plate (41), and circular through holes are provided at the bottom end of the mounting plate (41) corresponding to the positions of the feed pipe (33) and the air outlet pipe (34). Positioning holes are provided on both sides of the mounting plate (41), and limiting sliders (42) are slidably provided in the positioning holes. A third reset spring (43) is provided between one end of the limiting slider (42) and one side of the positioning hole. A limiting plate (45) is fixedly provided at the upper end of the bottom plate (13) corresponding to the position of the limiting slider (42), and a limiting hole is provided on one side of the limiting plate (45) and at the working height of the limiting slider (42). A pushing component for releasing the fixing of the limiting slider (42) is provided inside the mounting plate (41).

7. The automotive rubber part injection molding device according to claim 6, characterized in that: The pushing assembly comprises a second connecting rod (44), a pull rod is fixedly provided at one end of the limit slider (42), a second connecting rod (44) is hingedly provided at one end of the pull rod, the other ends of the two second connecting rods (44) on the same side are hingedly connected to the two ends of the hinge rod respectively, a top rod is fixedly provided at the bottom end of the hinge rod, and one end of the top rod extends to the outside of the mounting plate (41).

8. The automotive rubber part injection molding device according to claim 7, characterized in that: A dredging rod (36) is provided inside the air vent (35) at a position coaxial with the exhaust hole, a limiting frame is slidably provided at one end of the dredging rod (36), and the limiting frame is fixedly provided at the bottom end of the air vent (35), a first connecting rod (37) is hingedly provided at one end of the dredging rod (36), and the other end of the first connecting rod (37) is hingedly connected to the hinge frame, and the hinge frame is fixedly provided at the output end of the spring telescopic rod (38), and the spring telescopic rod (38) is fixedly provided at the bottom end of the air vent (35), and a fixing rod (39) is provided above the mounting plate (41) at a position corresponding to the position of the hinge frame, and the fixing rod (39) is fixedly provided on the mounting frame, and the mounting frame is fixedly provided on the upper end of the mounting platform (12).

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