An over injection correction system and correction method applied to an injection mold

Abstract

This invention belongs to the field of mold manufacturing technology, specifically an over-injection correction system and method for injection molds. The system includes a lower base plate and an upper base plate of the injection mold. A support pad is symmetrically fixed to one side of the lower base plate, and a temperature control base is fixed to one side of the support pad. A lower mold plate is mounted on the middle surface of the temperature control base, and a correction mechanism is installed inside the temperature control base. An injection mechanism is mounted on the outer surface of the lower mold plate. A material conveying cylinder is mounted on one side of the upper base plate, and a uniform feeding mechanism is installed inside the material conveying cylinder. This over-injection correction system and method for injection molds works by exposing the discharge port of the discharge pipe at the upper end of one side of the correction groove during the downward movement of the lower mold plate due to over-injection. Excess material is then discharged through the inclined discharge pipe to the connecting pipe on the outside. Furthermore, a pressure relief valve releases pressure inside the injection cavity, thus meeting the injection requirements.

Description

Technical Field

[0001] This invention relates to the field of mold manufacturing technology, and in particular to an over-injection correction system and method for injection molds. Background Technology

[0002] In manufacturing, products are mainly obtained by processing raw materials in various ways. Among them, the injection molding process is a highly efficient method of producing products. Injection molding mainly involves heating and melting the raw materials, and then using an injection molding machine to inject the melted raw materials into an injection mold.

[0003] In injection molding, the injection volume of raw materials is difficult to control, which easily leads to over-injection. To solve the problem of over-injection, the traditional method is to install a pressure sensor in the injection mold to detect the pressure inside the mold and thus control the injection volume. However, this method can only play an auxiliary role. Once over-injection occurs, it is impossible to adjust the raw materials inside the mold. Therefore, it cannot meet the needs of use. The present invention solves the shortcomings of the above-mentioned technical problems. Summary of the Invention

[0004] Existing over-injection correction devices rely on installing pressure sensors in the injection mold to detect the internal pressure and control the injection volume. However, this method only provides auxiliary assistance and cannot adjust the material inside the mold when over-injection occurs. To address this problem, this invention proposes an over-injection correction system and method for injection molds.

[0005] This invention proposes an over-injection correction system for injection molds, comprising a lower base plate and an upper base plate of the injection mold. A support pad is symmetrically fixedly connected to one side surface of the lower base plate. A temperature control base is fixedly connected to one side surface of the support pad. A guide rod is fixedly connected to one side surface of the temperature control base. A locking rod is connected to the surface of the support pad via a cylinder. The outer surface of the locking rod is slidably connected to the inner wall of a sliding hole on the surface of the temperature control base. A lower mold plate is provided on the middle surface of the temperature control base. A correction mechanism is provided inside the temperature control base. An injection mechanism is provided on the outer surface of the lower mold plate. A material conveying cylinder is provided on one side of the upper base plate. A uniform feeding mechanism is provided inside the material conveying cylinder.

[0006] The correction mechanism promptly discharges excess injection molding material from the surface of the lower mold plate, ensuring that the injected injection molding material meets the requirements.

[0007] The injection molding mechanism stabilizes the corrected lower mold plate to enable injection molding and demolding.

[0008] The uniform feeding mechanism feeds the injection molding material through the upper base plate at a uniform speed, preventing any material from rushing in.

[0009] Preferably, the calibration mechanism includes a calibration groove, which is formed on the middle surface of the temperature control base. A sealing ring is fixedly sleeved on the outer surface of the lower mold plate, and the outer surface of the sealing ring is slidably sleeved with the inner wall of the calibration groove. A buffer telescopic rod is fixedly connected in a rectangular array to the inner bottom wall of the calibration groove. A buffer spring is fixedly sleeved on the outer surface of the buffer telescopic rod, and the free end of the buffer spring is fixedly connected to one side surface of the lower mold plate.

[0010] With the above technical solution, when the surface of the lower mold plate is quantitatively supplied with rubber, the outer surface of the lower mold plate is horizontal with the surface of the opening of the correction groove, and the injection molding is completed. When the rubber on the surface of the lower mold plate is injected in excess, the lower mold plate is squeezed to slide and extend inside the correction groove, and is supported by the buffer telescopic rod and the buffer spring. The sealing ring is made of rubber, which can seal the movement process of the lower mold plate, so that the surface rubber is injected in excess when the lower mold plate moves downward.

[0011] Preferably, the calibration mechanism further includes a tapered discharge pipe that is obliquely distributed. The discharge pipe is fixedly installed inside the temperature control base, and one end of the discharge pipe is fixedly connected to the inside of the calibration groove. The other end of the discharge pipe is fixedly connected to a transparent connecting pipe, and one end of the connecting pipe is connected to the inside of the conveying cylinder through a micro suction pump to form a loop.

[0012] With the above technical solution, the surface of the discharge pipe is level with the side wall of the correction groove. In order to correct over-injection, during the process of the lower mold plate moving down due to over-injection, the discharge port of the discharge pipe at the upper end of one side of the correction groove is exposed. As a result, the excess material is discharged outward through the connecting pipe of the discharge pipe distributed on the side, so that the lower mold plate gradually returns to its original position. When the lower mold plate covers the discharge port of the discharge pipe, the upper surface of the lower mold plate is level with the upper surface of the correction groove, which meets the injection requirements. In order to speed up the correction, a micro suction pump is activated during the discharge process to extract the excess material and discharge it into the internal circulation of the conveying cylinder for reuse.

[0013] Preferably, the calibration mechanism further includes a pressure gauge and a pressure relief valve installed on the upper base plate, an upper mold plate is fixedly connected to one side surface of the upper base plate, and a first photoelectric switch is installed on the outer surface of the connecting pipe.

[0014] Through the above technical solution, when the upper mold plate and the lower mold plate are closed, an injection cavity is formed. The pressure gauge monitors the pressure inside the injection cavity. When there is excessive injection, the pressure inside the injection cavity increases. When the excess material is discharged, the pressure relief valve adjusts the pressure inside the injection cavity in time to keep the pressure inside the injection cavity stable. At the same time, in order to control the operation of the micro suction pump, a first photoelectric switch is set. When the material passes through the transparent connecting tube, it is detected by the first photoelectric switch, which can then control the micro suction pump to start.

[0015] Preferably, the injection molding mechanism includes a second photoelectric switch, which is installed on the upper inner wall of the calibration groove and monitors the resetting of the lower mold plate. The sealing ring has concave slots on both sides. The temperature control base has symmetrically arranged T-shaped mounting slots inside. One end of the mounting slot is fixedly connected to the interior of the calibration groove. A pushing cylinder is installed inside the mounting groove. A rubber-faced clamping plate is fixedly connected to the piston rod surface of the pushing cylinder. The outer surface of the clamping plate is slidably connected to the inner wall of the front end of the mounting groove and slidably abuts against the inner wall of the clamping groove.

[0016] Through the above technical solution, in order to stabilize the corrected lower mold plate and complete the injection molding after it is closed with the upper mold plate, when the excess rubber material on the surface of the lower mold plate is discharged, the lower mold plate is reset in the correction groove due to the buffer telescopic rod and the buffer spring. When it is reset, it passes through the second photoelectric switch, which controls the push cylinder to act, so that its piston rod pushes the clamping plate out of the mounting groove and its outer surface is clamped into the clamping groove, thus fixing and limiting the reset lower mold plate, thereby realizing the injection molding action.

[0017] Preferably, the injection molding mechanism further includes a top plate, one side surface of which is slidably connected to one side surface of the bottom plate, a pneumatic rod penetrating the bottom plate is installed on one side surface of the top plate, hydraulic push rods are symmetrically fixedly connected to the other side surface of the bottom plate, and a plurality of ejector pins are fixedly connected to the other side surface of the top plate, the outer surface of the ejector pins being slidably sleeved with the inner wall of the sliding hole opened in the bottom wall of the correction groove.

[0018] Through the above technical solution, in order to demold the mold formed on the lower mold plate with the correction mechanism, the lower base plate that has completed injection molding after correction is separated from the upper base plate by the hydraulic push rod reset. At this time, the top plate is pushed by the air rod to drive the ejector pin forward, so that the ejector pin completes the demolding action.

[0019] Preferably, the injection molding mechanism further includes multiple ejector pin holes, the positions of the multiple ejector pin holes correspond one-to-one with the positions of the ejector pin pillars, the ejector pin holes are opened through the interior of the lower mold plate, and a T-shaped cylinder is fixedly installed inside each of the multiple ejector pin holes by a spring, and one side surface of the ejector pin pillar is in sliding contact with one side surface of the cylinder.

[0020] The above technical solution aims to demold the mold after injection molding by moving multiple ejector pins without hindering the correction of the lower mold plate. The cylinder is equipped with springs to close the ejector pin holes. After injection molding is completed, the ejector pins move forward to push the cylinder forward, thereby completing the demolding action.

[0021] Preferably, the uniform feeding mechanism includes a conical feeding hole, which is opened inside the upper base plate and penetrates the upper mold plate. The inside of the feeding cylinder is provided with a mixing chamber with a conical front end. A spiral conveying rod is installed on the inner wall of the mixing chamber through a bearing. A stirring motor is fixedly installed on one side surface of the feeding cylinder. The outer surface of the output shaft of the stirring motor is fixedly connected to the outer surface of the output shaft of the stirring motor through a coupling.

[0022] In order to achieve uniform feeding into the injection cavity, the feed hole is designed in a conical shape. In order to prevent the rubber material in the feed cylinder from being quickly squeezed into the injection cavity by hydraulic pressure, the rubber material in the feed cylinder is driven by the stirring motor to rotate the spiral conveyor rod to achieve uniform forward propulsion of the rubber material.

[0023] Preferably, the uniform feeding mechanism further includes a push cylinder, which is installed inside the mounting cavity opened in the spiral conveyor rod, and a conical rubber plug is fixedly connected to the piston rod surface of the push cylinder.

[0024] With the above technical solution, in order to allow the propelled rubber material to enter the injection cavity through the conical feed hole, the push cylinder is activated after the spiral conveyor rod is activated, so that its piston rod pushes the rubber plug forward, thereby achieving uniform feeding and avoiding multiple overfeeding.

[0025] The present invention proposes a correction method for an over-injection correction system applied to injection molds, comprising the following steps:

[0026] S1. After the lower base plate on the injection molding machine is activated by the hydraulic push rod, the upper mold plate on the upper base plate and the lower mold plate are closed. At this time, the material is conveyed into the machine through the hopper of the material conveying cylinder. The stirring motor is activated to drive the spiral conveyor rod to rotate, so that the material is pushed forward at a uniform speed. After the spiral conveyor rod is activated, the push cylinder is activated, so that its piston rod pushes the rubber plug forward, so that the material is pushed into the injection cavity through the conical feed hole.

[0027] S2. When excessive amount of rubber is injected into the surface of the mold plate, the pressure inside the injection cavity increases, the pressure gauge reading on the upper base plate changes, and the excess rubber squeezes the mold plate, causing the sealing ring on its outer surface to slide and expand inside the correction groove, and compressing the buffer telescopic rod and buffer spring.

[0028] S3. During the downward movement of the lower mold plate due to excessive injection, the discharge port of the discharge pipe at the upper end of one side of the correction groove is exposed. As a result, the excess material is discharged outward through the connecting pipe along the inclined discharge pipe. The pressure relief valve assists in relieving pressure inside the injection cavity, allowing the lower mold plate to gradually return to its original position. When the lower mold plate covers the discharge port of the discharge pipe, the upper surface of the lower mold plate is level with the upper surface of the correction groove, which meets the injection requirements. The discharged material is detected by the first photoelectric switch when it passes through the transparent connecting pipe, which can then control the micro suction pump to start, extract the excess material and discharge it into the internal circulation of the feed cylinder.

[0029] S4. When the lower mold plate is reset in the correction groove due to the buffer telescopic rod and buffer spring, it passes through the second photoelectric switch during reset. This causes the second photoelectric switch to control the cylinder to move, so that its piston rod pushes the card plate out of the mounting groove and its outer surface is locked into the card slot, thus fixing and limiting the reset lower mold plate. At this time, the temperature control base adjusts the temperature to complete the injection molding.

[0030] S5. After injection molding is completed, demolding is required. The lower base plate will detach from the upper base plate due to the hydraulic push rod reset. At this time, the air rod will push the top plate to move the ejector pin forward, which in turn pushes the cylinder forward, thus completing the demolding action.

[0031] The beneficial effects of this invention are as follows:

[0032] 1. By setting up a calibration mechanism, not only can the pressure inside the injection cavity be monitored, but also excess material can be discharged in a timely manner to achieve the calibration purpose. During the adjustment process, as the lower mold plate moves downward due to excessive injection, the discharge port of the discharge pipe at the upper end of one side of the calibration groove is exposed. As a result, the excess material is discharged outward through the connecting pipe along the inclined discharge pipe. The pressure relief valve assists in relieving pressure inside the injection cavity, allowing the lower mold plate to gradually return to its original position. When the lower mold plate covers the discharge port of the discharge pipe, the upper surface of the lower mold plate is level with the upper surface of the calibration groove, which meets the injection requirements. The discharged material is detected by the first photoelectric switch when passing through the transparent connecting pipe, which can then control the micro suction pump to start, extracting the excess material and discharging it into the internal circulation of the feed cylinder for reuse. This improves the production efficiency of the injection mold and avoids waste of material.

[0033] 2. By setting up an injection molding mechanism, the lower mold plate equipped with a correction mechanism can be stabilized, which facilitates injection molding efficiency and demolding. During the adjustment process, the lower mold plate is reset in the correction groove by the buffer telescopic rod and buffer spring. When it is reset, it passes through the second photoelectric switch, which controls the cylinder to move. The piston rod pushes the clamping plate out of the mounting groove and its outer surface is locked into the clamping groove, fixing and limiting the reset lower mold plate. At this time, the temperature control base adjusts the temperature to complete the injection molding. By pushing the air rod, the top plate drives the ejector pin column forward, which in turn pushes the cylinder forward, thus completing the demolding action of the cylinder. This improves the production efficiency of injection molding and allows the correction mechanism to complete the correction.

[0034] 3. By setting a uniform feeding mechanism, the calibration mechanism can be easily adjusted to achieve the calibration purpose. During the adjustment process, the stirring motor drives the spiral conveyor to rotate, so as to push the rubber material forward at a uniform speed. After the spiral conveyor moves, the push cylinder moves, so that its piston rod pushes the rubber plug forward, so that the pushed rubber material enters the injection cavity through the conical feed hole, thereby achieving uniform feeding and avoiding multiple overfeeding. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of an over-injection correction system and method for injection molds proposed in this invention;

[0036] Figure 2 This is a three-dimensional view of the air rod structure of an over-injection correction system and correction method for injection molds proposed in this invention;

[0037] Figure 3 This is a three-dimensional view of the ejector pin structure of an over-injection correction system and method for injection molds proposed in this invention;

[0038] Figure 4 This is a three-dimensional view of the temperature control base structure of an over-injection correction system and correction method for injection molds proposed in this invention;

[0039] Figure 5 This is a perspective view of the upper mold plate structure of an over-injection correction system and method for injection molds proposed in this invention;

[0040] Figure 6 This is a three-dimensional view of the conical feed hole structure of an over-injection correction system and method for injection molds proposed in this invention;

[0041] Figure 7 This is a perspective view of the lower mold plate structure of an over-injection correction system and method for injection molds proposed in this invention;

[0042] Figure 8 This is a perspective view of the buffer telescopic rod structure of an over-injection correction system and correction method for injection molds proposed in this invention;

[0043] Figure 9 This is a perspective view of the correction groove structure of an over-injection correction system and correction method for injection molds proposed in this invention;

[0044] Figure 10 This is a three-dimensional view of the connecting pipe structure of an over-injection correction system and correction method for injection molds proposed in this invention;

[0045] Figure 11 This is a three-dimensional view of the push cylinder structure of an over-injection correction system and correction method for injection molds proposed in this invention;

[0046] Figure 12 This is a three-dimensional view of a cylindrical structure of an over-injection correction system and method for injection molds proposed in this invention.

[0047] Figure 13 This is a three-dimensional view of the stirring chamber structure of an over-injection correction system and correction method for injection molds proposed in this invention;

[0048] Figure 14 This is a perspective view of the spiral conveyor structure of an over-injection correction system and correction method for injection molds proposed in this invention.

[0049] In the diagram: 1. Lower base plate; 11. Support pad; 2. Upper base plate; 21. Pressure gauge; 22. Pressure relief valve; 23. Upper mold plate; 24. Feed cylinder; 3. Temperature control base; 31. Guide rod; 32. Locking rod; 4. Lower mold plate; 5. Alignment mechanism; 51. Alignment groove; 52. Sealing ring; 53. Buffer telescopic rod; 54. Buffer spring; 55. Discharge pipe; 56. Connecting pipe; 57. First photoelectric switch 6. Injection molding mechanism; 61. Second photoelectric switch; 62. Slot; 63. Mounting slot; 64. Push cylinder; 65. Chesing plate; 66. Top plate; 67. Hydraulic push rod; 68. Pneumatic rod; 69. Ejector pin column; 7. Uniform feeding mechanism; 71. Conical feed hole; 72. Mixing chamber; 73. Screw conveyor rod; 74. Mixing motor; 75. Push cylinder; 76. Rubber plug; 8. Ejector pin hole; 81. Cylinder. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0051] Reference Figure 1-14 An over-injection correction system and method for injection molds includes a lower base plate 1 and an upper base plate 2 of the injection mold. A support pad 11 is symmetrically fixedly connected to one side surface of the lower base plate 1. A temperature control base 3 is fixedly connected to one side surface of the support pad 11. A guide rod 31 is fixedly connected to one side surface of the temperature control base 3. A locking rod 32 is connected to the surface of the support pad 11 via a cylinder. The outer surface of the locking rod 32 is slidably connected to the inner wall of a sliding hole on the surface of the temperature control base 3. A lower mold plate 4 is provided on the middle surface of the temperature control base 3. A correction mechanism 5 is provided inside the temperature control base 3. An injection mechanism 6 is provided on the outer surface of the lower mold plate 4. A feed cylinder 24 is provided on one side of the upper base plate 2. A uniform feeding mechanism 7 is provided inside the feed cylinder 24.

[0052] The correction mechanism 5 promptly discharges excess injection molding material from the surface of the lower mold plate 4, ensuring that the injected injection molding material meets the requirements.

[0053] To achieve the purpose of calibrating the lower mold plate 4, the calibration mechanism 5 includes a calibration groove 51, which is located on the middle surface of the temperature control base 3. To prevent leakage of the adhesive, a sealing ring 52 is fixedly fitted onto the outer surface of the lower mold plate 4. The outer surface of the sealing ring 52 is slidably fitted onto the inner wall of the calibration groove 51. To support and reset the lower mold plate 4 during calibration, a buffer telescopic rod 53 is fixedly connected in a rectangular array to the inner bottom wall of the calibration groove 51. A buffer spring 54 is fixedly fitted onto the outer surface of the buffer telescopic rod 53. The free end of the buffer spring 54 is fixedly connected to one side surface of the lower mold plate 4. Therefore, when the adhesive on the surface of the lower mold plate 4 is injected in excess, the lower mold plate is squeezed to slide and extend inside the calibration groove 51, and is supported by the buffer telescopic rod 53 and the buffer spring 54. The sealing ring 52 is made of rubber and can seal the movement of the lower mold plate 4, so that when the lower mold plate 4 moves downward, the surface adhesive is injected in excess.

[0054] To correct over-injection, the correction mechanism 5 also includes a tapered discharge pipe 55 distributed obliquely. The discharge pipe 55 is fixedly installed inside the temperature control base 3, and one end of it is fixedly connected to the inside of the correction groove 51. The other end of the discharge pipe 55 is fixedly connected to a transparent connecting pipe 56, and one end of the connecting pipe 56 is connected to the inside of the material delivery cylinder 24 through a micro suction pump to form a loop. As the lower mold plate 4 moves downward due to over-injection, the discharge port of the discharge pipe 55 at the upper end of one side of the correction groove 51 is exposed. As a result, the excess material is discharged along the obliquely distributed discharge pipe 55 to the outer connecting pipe 56, so that the lower mold plate 4 gradually returns to its original position. When the lower mold plate 4 covers the discharge port of the discharge pipe 55, the upper surface of the lower mold plate 4 is level with the upper surface of the correction groove 51, which meets the injection requirements.

[0055] To regulate the pressure inside the injection cavity, the calibration mechanism 5 also includes a pressure gauge 21 and a pressure relief valve 22 installed on the upper base plate 2. An upper mold plate 23 is fixedly connected to one side surface of the upper base plate 2. Meanwhile, to control the operation of the micro suction pump, a first photoelectric switch 57 is installed on the outer surface of the connecting pipe 56. When excess rubber is discharged, the pressure relief valve 22 promptly regulates the pressure inside the injection cavity, thereby keeping the pressure inside the injection cavity stable. When the rubber passes through the transparent connecting pipe 56, it is detected by the first photoelectric switch 57, which can then control the micro suction pump to start.

[0056] By setting the correction mechanism 5, not only can the pressure inside the injection cavity be monitored, but also the excess rubber material can be discharged in time to achieve the correction purpose. During the adjustment process, as the lower mold plate 4 moves downward due to excessive injection, the discharge port of the discharge pipe 55 at the upper end of one side of the correction groove 51 is exposed. As a result, the excess rubber material is discharged outward through the connecting pipe 56 along the inclined discharge pipe 55. The pressure relief valve 22 assists in relieving the pressure inside the injection cavity, so that the lower mold plate 4 gradually returns to its original position. When the lower mold plate 4 covers the discharge port of the discharge pipe 55, the upper surface of the lower mold plate 4 is level with the upper surface of the correction groove 51, which meets the injection requirements. The discharged rubber material is detected by the first photoelectric switch 57 when it passes through the transparent connecting pipe 56. The first photoelectric switch 57 can then control the micro suction pump to start, extract the excess rubber material and discharge it into the inside of the feed cylinder 24 for recycling, thereby improving the production efficiency of the injection mold and avoiding waste of rubber material.

[0057] The injection molding mechanism 6 stabilizes the corrected lower mold plate 4, enabling it to perform injection molding and demolding.

[0058] To stabilize the corrected lower mold plate 4 and complete injection molding after it closes with the upper mold plate 23, the injection molding mechanism 6 includes a second photoelectric switch 61. The second photoelectric switch 61 is installed on the upper inner wall of the correction groove 51 and monitors the resetting of the lower mold plate 4. Both sides of the sealing ring 52 are provided with concave slots 62. The interior of the temperature control base 3 is provided with symmetrical T-shaped mounting slots 63. One end of the mounting slot 63 is fixedly connected to the interior of the correction groove 51. A push cylinder 64 is installed inside the mounting slot 63. A rubber-faced clamping plate 65 is fixedly connected to the piston rod of the push cylinder 64. The outer surface of the clamping plate 65 is slidably connected to the inner wall of the front end of the mounting slot 63 and slidably abuts against the inner wall of the slot 62. The second photoelectric switch 61 controls the push cylinder 64 to move, so that its piston rod pushes the clamping plate 65 out of the mounting slot 63 and its outer surface is inserted into the slot 62, fixing and limiting the resetting lower mold plate 4, thereby realizing the injection molding action.

[0059] In order to demold the mold formed on the lower mold plate 4 with the correction mechanism 5, the injection molding mechanism 6 also includes a top plate 66. One side surface of the top plate 66 is slidably connected to one side surface of the lower base plate 1. An air rod 68 that penetrates the lower base plate 1 is installed on one side surface of the top plate 66. Hydraulic push rods 67 are symmetrically fixedly connected to the other side surface of the lower base plate 1. Multiple ejector pins 69 are fixedly connected to the other side surface of the top plate 66. The outer surface of the ejector pins 69 is slidably sleeved with the inner wall of the sliding hole opened in the bottom wall of the correction groove 51.

[0060] In order to demold the molded mold after the multiple ejector pins 69 move without hindering the correction of the lower mold plate 4, the injection molding mechanism 6 also includes multiple ejector pin holes 8. The positions of the multiple ejector pin holes 8 correspond one-to-one with the positions of the ejector pins 69. The ejector pin holes 8 are opened through the interior of the lower mold plate 4. T-shaped cylinders 81 are fixedly installed inside the multiple ejector pin holes 8 by installing springs. One side surface of the ejector pin 69 slides in contact with one side surface of the cylinder 81. The cylinder 81 closes the ejector pin holes 8 by installing springs. After the injection is completed, the ejector pins 69 move forward and push the cylinder 81 forward, thereby enabling the cylinder 81 to complete the demolding action.

[0061] By setting the injection molding mechanism 6, the lower mold plate 4 equipped with the correction mechanism 5 can be stabilized, which facilitates the injection molding efficiency and demolding. During the adjustment process, the lower mold plate 4 is reset in the correction groove 51 by the buffer telescopic rod 53 and the buffer spring 54. When it is reset, it passes through the second photoelectric switch 61, which controls the push cylinder 64 to act, so that its piston rod pushes the clamping plate 65 out of the mounting groove 63 and its outer surface is locked into the clamping groove 62, fixing and limiting the reset lower mold plate 4. At this time, the temperature control base 3 performs temperature control and adjustment to complete the injection molding. By pushing through the air rod 68, the top plate 66 drives the ejector pin column 69 to move forward, which in turn pushes the cylinder 81 forward, thereby completing the demolding action of the cylinder 81, thus improving the injection molding production efficiency and enabling the correction mechanism 5 to complete the correction.

[0062] The uniform feeding mechanism 7 feeds the injection molding material through the upper base plate 2 at a uniform speed to prevent any material from rushing in.

[0063] To achieve uniform feeding into the injection cavity, the uniform feeding mechanism 7 includes a conical feeding hole 71, which is located inside the upper base plate 2 and extends through the upper mold plate 23. To prevent the rubber material in the feeding cylinder 24 from being rapidly extruded into the injection cavity by hydraulic pressure, a mixing chamber 72 with a conical front end is provided inside the feeding cylinder 24. A spiral conveying rod 73 is mounted on the inner wall of the mixing chamber 72 via bearings. A stirring motor 74 is fixedly mounted on one side surface of the feeding cylinder 24. The outer surface of the output shaft of the stirring motor 74 is fixedly connected to the outer surface of the output shaft of the stirring motor 74 via a coupling. When the stirring motor 74 is activated, it drives the spiral conveying rod 73 to rotate, thereby achieving uniform forward propulsion of the rubber material.

[0064] In order to allow the propelled rubber material to enter the injection cavity through the conical feed hole 71, the uniform feeding mechanism 7 also includes a push cylinder 75. The push cylinder 75 is installed inside the mounting cavity opened in the spiral conveyor rod 73. A conical rubber plug 76 is fixedly connected to the piston rod surface of the push cylinder 75. When the push cylinder 75 is activated, its piston rod pushes the rubber plug 76 forward, thereby achieving uniform feeding and avoiding multiple overfeeding.

[0065] By setting a uniform feeding mechanism 7, the correction mechanism 5 can be easily adjusted to achieve the purpose of correction. During the adjustment process, the stirring motor 74 is activated, which drives the spiral conveyor rod 73 to rotate, so as to push the rubber material forward at a uniform speed. After the spiral conveyor rod 73 is activated, the push cylinder 75 is activated, which pushes the rubber plug 76 forward with its piston rod, so that the pushed rubber material enters the injection cavity through the conical feed hole 71, thereby achieving uniform feeding and avoiding multiple overfeeding.

[0066] Working principle: In a specific embodiment of the present invention, after the lower base plate 1 on the injection molding machine is actuated by the hydraulic push rod 67, the upper mold plate 23 on the upper base plate 2 and the lower mold plate 4 are closed. At this time, the material is conveyed into the material through the hopper of the material conveying cylinder 24, and the stirring motor 74 is actuated to drive the spiral conveying rod 73 to rotate, so as to achieve uniform forward propulsion of the material. After the spiral conveying rod 73 is actuated, the push cylinder 75 is actuated, so that its piston rod pushes the rubber plug 76 forward, so that the propelled material enters the injection cavity through the conical feed hole 71.

[0067] When excessive amounts of rubber are injected onto the surface of the mold plate 4, the pressure inside the injection cavity increases, the pressure gauge 21 on the upper base plate 2 changes, and the excess rubber squeezes down the mold plate, causing the sealing ring 52 on its outer surface to slide and extend inside the correction groove 51, and compressing the buffer extension rod 53 and the buffer spring 54.

[0068] During the downward movement of the lower mold plate 4 due to excessive injection, the discharge port of the discharge pipe 55 at the upper end of one side of the correction groove 51 is exposed. As a result, the excess material is discharged outward through the connecting pipe 56 along the inclined discharge pipe 55. The pressure relief valve 22 assists in relieving pressure inside the injection cavity, allowing the lower mold plate 4 to gradually return to its original position. When the lower mold plate 4 covers the discharge port of the discharge pipe 55, the upper surface of the lower mold plate 4 is level with the upper surface of the correction groove 51, which meets the injection requirements. The discharged material is detected by the first photoelectric switch 57 when it passes through the transparent connecting pipe 56, which enables the first photoelectric switch 57 to control the micro suction pump to start, extract the excess material and discharge it into the inside of the conveying cylinder 24 for recycling.

[0069] When the mold plate 4 is reset in the correction groove 51 due to the buffer telescopic rod 53 and the buffer spring 54, it passes through the second photoelectric switch 61 during the reset. As a result, the second photoelectric switch 61 controls the push cylinder 64 to move, so that its piston rod pushes the card plate 65 out of the mounting groove 63 and makes its outer surface fit into the card groove 62, thus fixing and limiting the reset lower mold plate 4. At this time, the temperature control base 3 performs temperature control and adjustment to complete the injection molding.

[0070] After injection molding is completed, demolding is required. The lower base plate 1 is disengaged from the upper base plate 2 due to the reset of the hydraulic push rod 67. At this time, the air rod 68 pushes the top plate 66 to drive the ejector pin 69 forward, which in turn pushes the cylinder 81 forward, thereby completing the demolding action of the cylinder 81.

[0071] 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. An overmolding correction system applied to an injection mold, comprising a lower base plate (1) and an upper base plate (2) of the injection mold, characterized in that: A support pad (11) is symmetrically fixedly connected to one side surface of the lower base plate (1). A temperature control base (3) is fixedly connected to one side surface of the support pad (11). A guide rod (31) is fixedly connected to one side surface of the temperature control base (3). A locking rod (32) is connected to the surface of the support pad (11) via a cylinder. The outer surface of the locking rod (32) is slidably connected to the inner wall of the sliding hole opened on the surface of the temperature control base (3). A lower mold plate (4) is provided on the middle surface of the temperature control base (3). A correction mechanism (5) is provided inside the temperature control base (3). An injection molding mechanism (6) is provided on the outer surface of the lower mold plate (4). A feeding cylinder (24) is provided on one side of the upper base plate (2). A uniform feeding mechanism (7) is provided inside the feeding cylinder (24). The correction mechanism (5) promptly discharges excess injection molding material from the surface of the lower mold plate (4) to ensure that the injected injection molding material meets the requirements. The calibration mechanism (5) includes a calibration groove (51), which is opened on the middle surface of the temperature control base (3). A sealing ring (52) is fixedly sleeved on the outer surface of the lower mold plate (4). The outer surface of the sealing ring (52) is slidably sleeved with the inner wall of the calibration groove (51). A buffer telescopic rod (53) is fixedly connected in a rectangular array to the inner bottom wall of the calibration groove (51). A buffer spring (54) is fixedly sleeved on the outer surface of the buffer telescopic rod (53). The free end of the buffer spring (54) is fixedly connected to one side surface of the lower mold plate (4). The injection molding mechanism (6) stabilizes the corrected lower mold plate (4) to perform injection molding and demolding. The injection molding mechanism (6) includes a second photoelectric switch (61), which is installed on the upper inner wall of the correction groove (51) and monitors the resetting of the lower mold plate (4). The sealing ring (52) has concave slots (62) on both sides. The temperature control base (3) has symmetrical T-shaped mounting slots (63) inside. One end of the mounting slot (63) is fixedly connected to the inside of the correction groove (51). A push cylinder (64) is installed inside the mounting slot (63). A rubber-material plate (65) is fixedly connected to the piston rod surface of the push cylinder (64). The outer surface of the plate (65) is slidably connected to the inner wall of the front end of the mounting groove (63) and slidably abuts against the inner wall of the slot (62). The injection molding mechanism (6) also includes a top plate (66), one side surface of the top plate (66) is slidably connected to one side surface of the bottom plate (1), one side surface of the top plate (66) is equipped with an air rod (68) that penetrates the bottom plate (1), the other side surface of the bottom plate (1) is symmetrically fixedly connected with hydraulic push rods (67), and the other side surface of the top plate (66) is fixedly connected with a plurality of ejector pins (69), the outer surface of the ejector pins (69) is slidably sleeved with the inner wall of the sliding hole opened in the bottom wall of the correction groove (51); The injection molding mechanism (6) also includes a plurality of ejector pin holes (8), the positions of the plurality of ejector pin holes (8) correspond one-to-one with the positions of the ejector pin pillars (69), the ejector pin holes (8) penetrate through the interior of the lower mold plate (4), and a T-shaped cylinder (81) is fixedly installed inside the plurality of ejector pin holes (8) by means of a spring, and one side surface of the ejector pin pillar (69) slides in contact with one side surface of the cylinder (81); The uniform feeding mechanism (7) feeds the injection molding material through the upper base plate (2) at a uniform speed to avoid any material rushing in.

2. A system for overmolding correction for injection molds as defined in claim 1, wherein: The calibration mechanism (5) also includes a tapered discharge pipe (55) that is obliquely distributed. The discharge pipe (55) is fixedly installed inside the temperature control base (3), and one end of it is fixedly connected to the inside of the calibration groove (51). The other end of the discharge pipe (55) is fixedly connected to a transparent connecting pipe (56), and one end of the connecting pipe (56) is connected to the inside of the conveying cylinder (24) through a micro suction pump to form a loop.

3. A system for overmolding correction for injection molds as defined in claim 2, wherein: The calibration mechanism (5) also includes a pressure gauge (21) and a pressure relief valve (22) installed on the upper base plate (2). An upper mold plate (23) is fixedly connected to one side surface of the upper base plate (2), and a first photoelectric switch (57) is installed on the outer surface of the connecting pipe (56).

4. A system for overmolding correction for injection molds as defined in claim 3, wherein: The uniform feeding mechanism (7) includes a conical feeding hole (71), which is opened inside the upper base plate (2) and passes through the upper mold plate (23). The inside of the conveying cylinder (24) is provided with a stirring chamber (72) with a conical front end. The inner wall of the stirring chamber (72) is equipped with a spiral conveying rod (73) through a bearing. A stirring motor (74) is fixedly installed on one side surface of the conveying cylinder (24). The outer surface of the output shaft of the stirring motor (74) is fixedly connected to the outer surface of the output shaft of the stirring motor (74) through a coupling.

5. A system for overmolding correction for injection molds as defined in claim 4, wherein: The uniform feeding mechanism (7) also includes a push cylinder (75), which is installed inside the mounting cavity opened by the spiral conveyor (73). A conical rubber plug (76) is fixedly connected to the piston rod surface of the push cylinder (75).

6. A correction method for an over-injection correction system applied to an injection mold according to any one of claims 1-5, comprising the following steps: S1. After the lower base plate (1) on the injection molding machine is activated by the hydraulic push rod (67), the upper mold plate (23) on the upper base plate (2) and the lower mold plate (4) are closed. At this time, the material is conveyed to the inside of the material through the hopper of the material conveying cylinder (24), and the stirring motor (74) is activated to drive the spiral conveying rod (73) to rotate so that the material is pushed forward at a uniform speed. After the spiral conveying rod (73) is activated, the push cylinder (75) is activated so that its piston rod pushes the rubber plug (76) forward so that the pushed material enters the injection cavity through the conical feed hole (71). S2. When the rubber material on the surface of the mold plate (4) is injected in excess, the pressure in the injection cavity increases, the pressure gauge (21) on the upper base plate (2) changes, and the excess rubber material squeezes the mold plate, causing the sealing ring (52) on its outer surface to slide and extend inside the correction groove (51), and compressing the buffer extension rod (53) and the buffer spring (54). S3. During the process of the lower mold plate (4) moving down due to excessive injection, the discharge port of the discharge pipe (55) at the upper end of the correction groove (51) is exposed. As a result, the excess rubber material is discharged outward through the discharge pipe (55) distributed on the side to the connecting pipe (56) on the outside. The pressure relief valve (22) assists in depressurizing the injection cavity, so that the lower mold plate (4) gradually returns to its original position. When the lower mold plate (4) covers the discharge port of the discharge pipe (55), the upper surface of the lower mold plate (4) is level with the upper surface of the correction groove (51), which meets the injection requirements. When the discharged rubber material passes through the transparent connecting pipe (56), it is detected by the first photoelectric switch (57), so that the first photoelectric switch (57) can control the micro suction pump to start, and the excess rubber material is extracted and discharged into the inside of the conveying cylinder (24) for recycling. S4. When the mold plate (4) is reset in the correction groove (51) due to the buffer telescopic rod (53) and the buffer spring (54), it passes through the second photoelectric switch (61) during the reset, thus causing the second photoelectric switch (61) to control the push cylinder (64) to move, so that its piston rod pushes the card plate (65) out of the mounting groove (63) and its outer surface is inserted into the card slot (62), thus fixing and limiting the reset lower mold plate (4). At this time, the temperature control base (3) performs temperature control adjustment to complete the injection molding. S5. After injection molding is completed, demolding is required. The lower base plate (1) is separated from the upper base plate (2) by the hydraulic push rod (67) resetting. At this time, the top plate (66) is pushed by the air rod (68) to drive the ejector pin (69) forward, which in turn pushes the cylinder (81) forward, thus completing the demolding action of the cylinder (81).

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