An injection mold

Abstract

The application discloses an injection mold and relates to the technical field of injection molds.The injection mold comprises a lower mold body, the top surface of the lower mold body is provided with an upper mold body, the top surface of the upper mold body is provided with a cavity for molding, the top surface of the upper mold body is fixedly provided with a support frame, the upper mold body, the lower mold body, the cavity, a Y-shaped shunt valve, a cooling channel, an infrared temperature measuring instrument and a water outlet pipe are cooperated with each other, the shrinkage wrinkles of plastic parts caused by uneven cooling can be reduced, the upper mold body, a support cylinder, a micro electric push rod, a micro motor, a triangular block, a support roller, a connecting disc, a connecting rod, a top block, a fixed ring, a second spring, a top rod, a limiting block, a sliding plate, a sliding strip, a sliding rail, an abutting plate, a support strip and a support box are cooperated with each other, the height of the plurality of support cylinders can be adjusted, the ejection stroke of each part of the complex plastic part is optimized, the ejection force is uniformly dispersed, the deformation of the plastic part is reduced, and the ejection effect of the plastic part is achieved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an injection mold. Background Technology

[0002] Injection molds are key tools in the injection molding process for manufacturing plastic products. They are precision metal molds into which molten plastic material is injected through specific structures and designs. After cooling and solidification, the molded plastic product has a specific shape, size, and function. The design and manufacture of injection molds have a decisive impact on the quality, production efficiency, and cost of injection molded parts. The process involves heating plastic granules to a molten state in an injection molding machine, then injecting the molten plastic through the machine's nozzle into the mold cavity. The plastic cools and solidifies within the mold cavity, forming the desired shape. The mold is then opened, and the molded plastic product is removed. Injection molds are indispensable tools in the modern plastics processing industry, and their design and manufacturing level directly affects the quality, production efficiency, and cost of injection molded parts.

[0003] A search revealed problems with existing injection molds. In existing molds, molten plastic enters the mold, and cooling channels circulate water to cool the plastic part. However, these channels typically surround the injection cavity, meaning the center of the part may not cool completely after the outer edges have cooled. This can lead to deformation during ejection. Furthermore, the molded part is ejected simultaneously by multiple ejector pins. Some parts may contain numerous reinforcing ribs or have complex shapes, and the contact area between the thin ejector pins and the part is small, causing the ejection force to concentrate in localized areas. This localized stress concentration can cause deformation or cracking during ejection. Additionally, during a single ejection, the ejection force may not be evenly distributed across the part. This uneven force can lead to excessive stress in certain areas, causing warping and poor ejection performance. Therefore, based on the above research and existing technologies, this paper proposes an injection mold to address these problems. Summary of the Invention

[0004] The purpose of this invention is to provide an injection mold with advantages such as good molding effect, good ejection effect and strong stability, so as to solve the problems mentioned in the background art, such as cooling water channels generally surrounding the injection cavity, which may result in the center position of the plastic part not being completely cooled after the outer side of the plastic part is cooled, and the ejection force may not be evenly distributed on the plastic part during one-time ejection, resulting in the warping of the plastic part.

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

[0006] An injection mold includes a lower mold body, an upper mold body on the top surface of the lower mold body, a cavity for molding on the top surface of the upper mold body, a support frame fixedly mounted on the top surface of the upper mold body, and a connecting seat fixedly mounted on the top surface of the support frame; a plurality of positioning pins, all fixedly mounted on the bottom surface of the upper mold body for positioning the upper mold body; an ejection mechanism disposed on the bottom surface of the lower mold body for ejecting the molded plastic part; the ejection mechanism includes a cooling channel on the top surface of the lower mold body, a Y-type diverter valve fixedly mounted on one side of the lower mold body, a drain pipe fixedly mounted on one side of the lower mold body for draining water, the drain pipe being connected to the cooling channel; and an mounting groove on the top surface of the lower mold body, with an infrared thermometer fixedly fitted onto the inner circular wall of the mounting groove.

[0007] Furthermore, the ejection mechanism also includes several mounting slots, each of which is formed on the inner bottom surface of the cavity. Two top blocks are movably fitted onto the inner circular wall of each mounting slot, and a top rod is fixedly installed between the two top blocks. A fixing ring is fixedly fitted onto the inner circular wall of each mounting slot, and the top rod is slidably connected to the fixing ring. A spring is fitted onto the outer circular wall of the top rod. A mounting plate is provided on the bottom surface of the lower mold body, and several support cylinders are provided on the top surface of the mounting plate. A mounting plate is provided on the inner circular wall of each support cylinder, and a triangular block is rotatably connected to the top surface of the mounting plate. A micro motor for driving the triangular block to rotate is installed on the bottom surface of the mounting plate. One end of the micro motor drive shaft passes through the mounting plate and is rotatably connected to the bottom surface of the triangular block. Several slide rails are fixedly installed on the top surface of the mounting plate, and the internal sliding surfaces of the slide rails... A sliding bar is connected to the mounting plate. A sliding plate is fixedly installed on the top surface of the sliding bar. An abutment plate is fixedly installed on one side of the sliding plate. Several connecting rods are rotatably connected to the top surface of the triangular block. Two limiting blocks are fixedly installed on one side of the sliding plate. One end of the connecting rod is rotatably connected to the two limiting blocks. A support roller is connected to the top surface of the miniature electric actuator. A connecting plate is fixedly installed on the top surface of the support roller. Several support boxes are fixedly installed on the outer circular wall of the connecting plate. A support strip is slidably connected inside the support box. One side of the support strip is fixedly connected to the inner circular wall of the abutment plate. A miniature electric actuator for driving the support cylinder to move is fixedly installed on the top surface of the connecting plate. The top surface of the telescopic shaft of the miniature electric actuator is fixedly connected to the inner top surface of the support cylinder. Several support blocks are fixedly installed outside the mounting plate. The bottom surface of the support blocks is fixedly connected to the bottom surface of the mounting plate.

[0008] Furthermore, the top and bottom surfaces of the support box are provided with sliding holes, and the top and bottom surfaces of the support strip are fixedly installed with limiting blocks, which are slidably connected to the sliding holes.

[0009] Furthermore, the top surface of the lower mold body is provided with several support grooves, the outer circular wall of the positioning post is slidably connected to the inner circular wall of the support groove, a support ring is fixedly sleeved on the inner circular wall of the support groove, a pressure rod is slidably connected to the inner circular wall of the support ring, a movable plate is fixedly installed on the top surface of the pressure rod, a spring is sleeved on the outer circular wall of the support ring, a pressure sensor is fixedly installed on the inner bottom surface of the support groove, and an alarm light for alarm is fixedly installed on the top surface of the upper mold body.

[0010] Furthermore, two base plates are fixedly installed on the bottom surface of the lower mold body. A support hole is provided on one side of the base plate. Movable blocks are fixedly installed on both sides of the mounting plate. A support rod for restricting the movement of the movable block is fixedly installed inside the support hole. The movable block is slidably connected to the support rod.

[0011] Furthermore, the top surface of the upper mold body is provided with an injection cavity for feeding material, and an overflow valve is fixedly sleeved on the inner circular wall of the injection cavity.

[0012] Furthermore, a fixing tube is fixedly installed on the top surface of the upper mold body, and a needle valve for controlling the flow rate is fixedly sleeved at one end of the fixing tube, and a support tube is fixedly sleeved on the inner circular wall of the needle valve.

[0013] Furthermore, the lower mold body is fixedly mounted on both sides by bolts with fixing brackets, and the bottom surface of the fixing brackets is provided with several fixing holes.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] By coordinating the upper mold body, lower mold body, cavity, Y-type diversion valve, cooling channel, infrared thermometer and water outlet pipe, shrinkage wrinkles caused by uneven cooling of plastic parts can be reduced, while deformation during the ejection process of plastic parts can be prevented.

[0016] By coordinating the upper mold body, support cylinder, micro electric push rod, micro motor, triangular block, support roller, connecting plate, connecting rod, ejector block, fixing ring, spring 2, ejector rod, limit block, sliding plate, slide bar, slide rail, abutment plate, support bar, and support box, the height of multiple support cylinders can be adjusted, optimizing the ejection stroke of various parts of complex plastic parts, evenly distributing the ejection force, reducing plastic part deformation, and achieving the desired ejection effect. This facilitates the production of plastic parts using the lower mold body and upper mold body.

[0017] The upper mold body, lower mold body, support groove, and positioning pin work together to position the upper mold body and lower mold body. The positioning pin, support groove, movable plate, pressure rod, spring, pressure sensor, and alarm light work together to trigger an alarm when the injection pressure is too high, preventing defective plastic parts from being mixed with other qualified plastic parts and improving the quality of the entire batch of plastic parts. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation structure of the injection cavity and overflow valve of the present invention;

[0020] Figure 3 This is a bottom view of the upper mold body structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the connection structure between the Y-type flow divider valve and the lower mold body of the present invention;

[0022] Figure 5 This is a schematic diagram of the installation structure of the cooling channel and water outlet pipe of the present invention;

[0023] Figure 6 for Figure 5 A magnified schematic diagram of a portion of the structure of A in the diagram;

[0024] Figure 7 This is a cross-sectional schematic diagram of the connection structure between the top block and the second mounting groove of the present invention;

[0025] Figure 8 This is a bottom view schematic diagram of the connection structure between the mounting plate and the connecting seat 2 of the present invention;

[0026] Figure 9 This is a schematic diagram of the installation structure of the support cylinder and the abutment plate of the present invention;

[0027] Figure 10 This is a schematic diagram of the support roller structure of the present invention;

[0028] Figure 11 for Figure 10 A magnified schematic diagram of a portion of the structure of B;

[0029] Figure 12 for Figure 10 A magnified schematic diagram of a local structure of C;

[0030] Figure 13 This is a schematic diagram of the connection structure between the mounting plate and the slide rail of the present invention.

[0031] In the diagram: 1. Lower mold body; 2. Upper mold body; 3. Support frame; 4. Connecting seat one; 5. Cavity; 6. Fixing frame; 7. Fixing hole; 8. Ejection mechanism; 9. Injection cavity; 10. Overflow valve; 11. Mounting slot one; 12. Infrared thermometer; 13. Fixing pipe; 14. Needle valve; 15. Support pipe; 16. Positioning pin; 17. Cooling channel; 18. Y-type diverter valve; 19. Water outlet pipe; 20. Support slot; 21. Support ring; 22. Movable plate; 23. Pressure rod; 24. Pressure sensor; 25. Spring one; 26. Mounting slot two; 27. Ejector block; 28. Fixing ring; 29. ​​Top rod; 30. Spring II; 31. Mounting plate; 32. Connecting seat II; 33. Limiting block; 34. Base plate; 35. Support hole; 36. Support rod; 37. Movable block; 38. Support cylinder; 39. Mounting plate; 40. Support block; 41. Miniature motor; 42. Abutment plate; 43. Support roller; 44. Miniature electric actuator; 45. Connecting rod; 46. Sliding plate; 47. Limiting block; 48. Slide rail; 49. Connecting plate; 50. Sliding bar; 51. Support box; 52. Support bar; 53. Sliding hole; 54. Alarm light; 55. Triangular block. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In one typical implementation of this application, please refer to Figures 1 to 13 An injection mold includes a lower mold body 1, an upper mold body 2 on the top surface of the lower mold body 1, a cavity 5 for molding on the top surface of the upper mold body 2, a support frame 3 fixedly installed on the top surface of the upper mold body 2, a connecting seat 4 fixedly installed on the top surface of the support frame 3, two round holes on the top surface of the connecting seat 4, through which a hydraulic cylinder can be connected to the upper mold body 2 and the support frame 3, so that the upper mold body 2 can be moved by the hydraulic cylinder, several positioning pins 16 are fixedly installed on the bottom surface of the upper mold body 2 for positioning the upper mold body 2, and an ejection mechanism 8 is provided on the bottom surface of the lower mold body 1 for ejecting the molded plastic part;

[0034] The ejection mechanism 8 includes a cooling channel 17, which is located on the top surface of the lower mold body 1. A Y-type diverter valve 18 is fixedly installed on one side of the lower mold body 1. Both ends of the Y-type diverter valve 18 are located inside the cooling channel 17. Water entering the Y-type diverter valve 18 will evenly enter the left and right sides of the cooling channel 17. A drain pipe 19 for drainage is fixedly installed on one side of the lower mold body 1. The drain pipe 19 is connected to the cooling channel 17. An installation groove 11 is provided on the top surface of the lower mold body 1. An infrared thermometer 12 for temperature measurement is fixedly sleeved on the inner circular wall of the installation groove 11.

[0035] The molten plastic enters the cavity 5 of the upper mold body 2. Water is introduced into the Y-type diversion valve 18. The water entering the Y-type diversion valve 18 flows out evenly from both sides into the cooling channel 17. This ensures that the amount of water in contact with both sides of the cavity 5 is the same, thus ensuring that the cooling efficiency of both sides of the plastic part is consistent. The infrared thermometer 12 can measure the overall temperature of the plastic part. By setting a threshold for the infrared thermometer 12, the part can only be ejected when the temperature of each part is lower than the threshold.

[0036] The ejection mechanism 8 also includes several mounting slots 26, which are all located on the bottom surface of the cavity 5. There are six mounting slots 26 in total. Four mounting slots 26 are located at the four corners of the cavity 5, and the other two are located in the middle. Two top blocks 27 are movably sleeved on the inner circular wall of the mounting slot 26. The top blocks 27 have a large surface area, so they are not easy to pierce into the plastic part when ejecting it. A top rod 29 is fixedly installed between the two top blocks 27. A fixing ring 28 is fixedly sleeved on the inner circular wall of the mounting slot 26. The top rod 29 is slidably connected to the fixing ring 28. A spring 30 is sleeved on the outer circular wall of the top rod 29. The spring 30 can provide a restoring force for the top blocks 27 and the top rod 29. One end of the spring 30 is fixedly connected to the bottom surface of the fixing ring 28, and the other end of the spring 30 is fixedly connected to the top surface of the top block 27 located below.

[0037] In this way, by pushing the top block 27 upward, the two top blocks 27 and the top rod 29 can move upward along the fixing ring 28, while the second spring 30 is compressed. After the plastic part is discharged, the top block 27 and the top rod 29 are reset under the action of the second spring 30, which is convenient for continuous use.

[0038] The bottom surface of the lower mold body 1 is provided with a mounting plate 31, and the top surface of the mounting plate 31 is provided with several support cylinders 38. The inner circular wall surface of the support cylinders 38 is provided with anti-slip texture, and the inner circular wall surface of the support cylinders 38 is provided with a mounting plate 39. The top surface of the mounting plate 39 is rotatably connected to a triangular block 55, and the bottom surface of the mounting plate 39 is equipped with a micro motor 41 for driving the triangular block 55 to rotate. One end of the drive shaft of the micro motor 41 passes through the mounting plate 39 and is rotatably connected to the bottom surface of the triangular block 55. The top surface of the mounting plate 39 is fixedly mounted. There are several slide rails 48, and slide bars 50 are slidably connected inside the slide rails 48. A sliding plate 46 is fixedly installed on the top surface of the slide bar 50. An abutment plate 42 is fixedly installed on one side of the sliding plate 46. The abutment plate 42 is a rubber arc-shaped structure with anti-slip texture on its outer wall to increase the friction between it and the inner wall of the support cylinder 38. Several connecting rods 45 are rotatably connected to the top surface of the triangular block 55 through a rotating shaft. Two limiting blocks 47 are fixedly installed on one side of the sliding plate 46. One end of the connecting rod 45 is connected to the two limiting blocks 47 through a rotating shaft. A rotating connection is made, and a support roller 43 is connected to the top surface of the miniature electric actuator 44 via a bearing. When the triangular block 55 rotates, the support roller 43 does not rotate. A connecting plate 49 is fixedly installed on the top surface of the support roller 43. Several support boxes 51 are fixedly installed on the outer circular wall of the connecting plate 49. Support bars 52 are slidably connected inside the support boxes 51. One side of the support bars 52 is fixedly connected to the inner circular wall of the abutment plate 42. The cooperation of the support boxes 51 and the support bars 52 restricts the movement of the abutment plate 42. The top surface of the connecting plate 49 is fixedly installed... There is a miniature electric actuator 44 for driving the support cylinder 38 to move. The top surface of the telescopic shaft of the miniature electric actuator 44 is fixedly connected to the inner top surface of the support cylinder 38. Several support blocks 40 are fixedly installed on the outside of the mounting plate 39. The bottom surface of the support blocks 40 is fixedly connected to the bottom surface of the mounting plate 31. A connecting seat 32 is fixedly installed on the bottom surface of the mounting plate 31. The mounting plate 31 can be driven to move by a hydraulic cylinder through the connecting seat 32. The miniature electric actuator 44, the infrared thermometer 12 and the miniature motor 41 are all controlled by the control box on the injection molding machine.

[0039] Among them, when using the lower mold body 1 and the upper mold body 2 to produce plastic parts with complex shapes, the workers can adjust the height of multiple support cylinders 38 so that the height of multiple support cylinders 38 gradually decreases from left to right.

[0040] The support cylinder 38 can be driven to move upward by the miniature electric actuator 44. After the multiple support cylinders 38 are adjusted to the appropriate height, the miniature motor 41 drives the triangular block 55 to rotate. The rotation of the triangular block 55 causes the connecting rod 45 to drive the sliding plate 46 to move outward. The outward movement of the sliding plate 46 causes the abutment plate 42 to abut against the inner wall of the support cylinder 38, thereby determining the height of the support cylinder 38. The plastic part is ejected by multiple support cylinders 38 of different heights, avoiding stress concentration on the plastic part.

[0041] Using the above-mentioned technical features, through the upper mold body 2, the operator uses a hydraulic cylinder to drive the upper mold body 2 to close the lower mold body 1 and the upper mold body 2, and the operator injects the molten plastic into the cavity 5 between the lower mold body 1 and the upper mold body 2.

[0042] The staff connects the water generated by the chiller to the Y-type diversion valve 18. The water enters the left and right channels of the cooling channel 17 evenly through the two outlets of the Y-type diversion valve 18. The amount of water entering the left and right channels of the cooling channel 17 is the same, and the radius of the cooling channel 17 is fixed. This ensures that the water cools the plastic parts inside the cavity 5 at the same rate, preventing the cooling rate of some parts of the plastic parts from being too fast or too slow due to different water volumes. This reduces shrinkage and wrinkles caused by uneven cooling of the plastic parts, resulting in a better molding effect. The water after cooling the plastic parts is discharged through the water outlet pipe 19. The staff can collect the used water and reuse it by connecting the water outlet pipe 19 to an external water collection pipe, thus reducing water consumption.

[0043] At the same time, the infrared thermometer 12 inside the mounting groove 11 on the upper mold body 2 can detect the overall temperature of the plastic part. The staff sets a threshold for the infrared thermometer 12. Only when the temperature of each part of the plastic part is lower than the threshold will it be ejected, so as to prevent the temperature of the plastic part near the center from being higher and the temperature of other areas from being lower, and to avoid deformation of the plastic part during the subsequent ejection process.

[0044] Secondly, the staff adjusts the height of multiple support cylinders 38 according to the shape of the plastic part, so that the height of multiple support cylinders 38 decreases from left to right. The staff starts the micro electric push rod 44 through the control box on the injection molding machine. The telescopic shaft of the micro electric push rod 44 moves upward, causing the support cylinders 38 to move upward. The equipment program moves multiple support cylinders 38 to the appropriate height in sequence. The equipment program starts the micro motor 41. The drive shaft of the micro motor 41 rotates, causing the triangular block 55 to rotate. At this time, the support roller 43 and the connecting plate 49 do not rotate.

[0045] The rotation of the triangular block 55 drives the connecting rod 45 to rotate. The rotation of the connecting rod 45 drives the sliding plate 46 to move outward through the limiting block 47. The outward movement of the sliding plate 46 also causes the slider 50 to move outward inside the slide rail 48. The slide rail 48 and the slider 50 cooperate to restrict the movement of the sliding plate 46. The outward movement of the sliding plate 46 drives the abutment plate 42 to move outward. The outward movement of the abutment plate 42 also drives the support bar 52 to move outward inside the support box 51. The support box 51 and the support bar 52 can support the movement of the abutment plate 42 and prevent the upper end of the abutment plate 42 from shaking. The outward movement of multiple abutment plates 42 will abut against the inner wall of the support cylinder 38, determine the position of the support cylinder 38, and prevent the support cylinder 38 from moving slightly downward due to the large load when ejecting the plastic part.

[0046] The operator uses an external hydraulic cylinder to drive the mounting plate 31 to move upward. The upward movement of the mounting plate 31 drives multiple support cylinders 38 to move upward. The height of the multiple support cylinders 38 gradually decreases from left to right. Therefore, the top block 27 on the left side of the upper mold body 2 is lifted first. This causes the top block 27 to drive the ejector rod 29 to move upward inside the fixed ring 28, while the spring 20 is compressed. The upward movement of the left top surface 27 causes the left side of the plastic part to be lifted first, followed by the middle part, and finally the right side. Compared with the one-time ejection method in the prior art, this solution adopts a stroke gradually increasing method to achieve "progressive ejection". The edge of the plastic part is ejected first, and then the middle part is gradually ejected, thereby evenly distributing the ejection force and reducing the deformation of the plastic part.

[0047] In addition, the ejection method described in this solution can be designed with different ejection strokes according to the shape of different parts of the plastic part, so as to avoid production problems caused by insufficient or excessive ejection in some areas. Taking large injection molded parts as an example, the ejection method described in this solution can shorten the overall ejection time and improve production efficiency.

[0048] During this process, by ensuring that the amount of water entering the cooling channel 17 is the same on both sides, the cooling rate is kept the same, reducing shrinkage and wrinkles caused by uneven cooling of the plastic part, resulting in a good molding effect. The overall temperature of the plastic part is detected by the infrared thermometer 12, and ejection is only performed when the temperature of each part of the plastic part is below the threshold, preventing deformation during the ejection process. By adjusting the height of multiple support cylinders 38, the ejection stroke of each part of the complex plastic part is optimized, the ejection force is evenly distributed, the deformation of the plastic part is reduced, and the ejection effect of the plastic part is achieved, which helps to produce plastic parts using the lower mold body 1 and the upper mold body 2.

[0049] The top and bottom surfaces of the support box 51 are provided with sliding holes 53, and the top and bottom surfaces of the support bar 52 are fixedly installed with limiting blocks 33. The limiting blocks 33 are slidably connected to the sliding holes 53. The support bar 52 can be prevented from detaching by the cooperation of the limiting blocks 33 and the sliding holes 53.

[0050] Specifically, by setting the abutment plate 42, the abutment plate 42 moves outward, causing the support bar 52 to move inside the support box 51, and at the same time causing the limiting block 33 to move inside the support bar 52. The limiting block 33 and the support bar 52 cooperate to restrict the support bar 52 and prevent the support bar 52 from detaching from the support box 51.

[0051] As a preferred embodiment of this example, please refer to [link / reference]. Figures 1 to 8The top surface of the lower mold body 1 is provided with several support grooves 20. The outer circular wall of the positioning post 16 is slidably connected to the inner circular wall of the support groove 20. A support ring 21 is fixedly sleeved on the inner circular wall of the support groove 20. A pressure rod 23 is slidably connected to the inner circular wall of the support ring 21. A movable plate 22 is fixedly installed on the top surface of the pressure rod 23. A spring 25 is sleeved on the outer circular wall of the support ring 21. One end of the spring 25 is fixedly connected to the bottom surface of the movable plate 22. The other end of the spring 25 is fixedly connected to the top surface of the support ring 21. A pressure sensor 24 is fixedly installed on the bottom surface inside the support groove 20. An alarm light 54 for alarm is fixedly installed on the top surface of the upper mold body 2. Both the pressure sensor 24 and the alarm light 54 are connected to the control box of the injection molding machine.

[0052] When the lower mold body 1 and the upper mold body 2 are closed, the positioning pin 16 presses the movable plate 22, causing the pressure rod 23 to move downward and contact the top surface of the pressure sensor 24. Then the molten plastic enters the cavity 5. If the pressure of the molten plastic is too high, the upper mold body 2 and the lower mold body 1 will separate. After the pressure sensor 24 does not sense the pressure, the alarm light 54 will be triggered.

[0053] Specifically, after the upper mold body 2 and the lower mold body 1 are closed by the operator, the positioning pin 16 on the upper mold body 2 enters the support groove 20 on the lower mold body 1. This causes the positioning pin 16 to press the movable plate 22. The movable plate 22 is pressed, which drives the pressure rod 23 to move downward, and at the same time, the spring 25 is compressed. The downward movement of the pressure rod 23 will press the pressure sensor 24. The pressure sensor 24 will detect the pressure. Then, the operator injects the molten plastic into the upper cavity 5 of the lower mold body 1. If the pressure of the molten plastic is too high, the pressure will push the upper mold body 2 upward. The upward movement of the upper mold body 2 will drive the positioning pin 16 to move upward. After the positioning pin 16 moves upward, the force of the spring 25 will cause the movable plate 22 and the pressure rod 23 to move upward. After the pressure rod 23 separates from the pressure sensor 24, the pressure sensor 24 will not detect the pressure and will activate the alarm light 54 to sound an alarm, indicating that this injection molding is unqualified and the quality of the plastic part is not up to standard. This prevents unqualified plastic parts from being mixed with other qualified plastic parts and improves the overall quality of the batch of plastic parts.

[0054] Two base plates 34 are fixedly installed on the bottom surface of the lower mold body 1. A support hole 35 is provided on one side of the base plate 34. Movable blocks 37 are fixedly installed on both sides of the mounting plate 31. A support rod 36 for restricting the movement of the movable block 37 is fixedly installed inside the support hole 35. The movable block 37 is slidably connected to the support rod 36. The movement path of the mounting plate 31 can be restricted by the cooperation of the support hole 35, the support rod 36 and the movable block 37.

[0055] Specifically, by setting the mounting plate 31, the mounting plate 31 moves upward, causing the movable block 37 to move along the support rod 36 inside the support hole 35 on the side of the base plate 34. The support hole 35, the support rod 36 and the movable block 37 cooperate to restrict the movement path of the mounting plate 31, thereby achieving the effect of limiting the mounting plate 31.

[0056] The top surface of the upper mold body 2 is provided with an injection cavity 9 for feeding material. An overflow valve 10 is fixedly sleeved on the inner circular wall of the injection cavity 9. The overflow valve 10 can ensure that the flow of fluid is more stable during the injection process.

[0057] Specifically, through the injection cavity 9, the injection molding machine injects molten plastic into the cavity 9. The pressure carried by the molten plastic allows it to enter the upper cavity 5 of the lower mold body 1 through the overflow valve 10. The overflow valve 10 can ensure that the fluid flow is more stable during the injection process, avoid fluid turbulence or air bubble inclusion caused by excessive pressure, thereby improving the molding quality of the product and achieving the injection molding effect of the plastic part.

[0058] A fixing pipe 13 is fixedly installed on the top surface of the upper mold body 2. A needle valve 14 for controlling the flow rate is fixedly sleeved at one end of the fixing pipe 13. The needle valve 14 precisely controls the fluid flow rate through a small valve core with a tip. A support pipe 15 is fixedly sleeved on the inner circular wall of the needle valve 14. A flange is fixedly sleeved on the outer circular wall of the support pipe 15. The external pipe can be connected to the support pipe 15 through the flange.

[0059] Specifically, through the support tube 15, the operator feeds the molten plastic into the support tube 15. The operator adjusts the needle valve 14 to control the flow rate of the molten plastic that can pass through the needle valve 14 in a single injection. The material with a fixed flow rate enters the cavity 5 through the fixed tube 13 and the injection cavity 9 to prevent excessive material and improve the standardization of the plastic parts.

[0060] The lower mold body 1 is fixedly mounted on both sides by bolts with a fixing bracket 6. The bottom surface of the fixing bracket 6 has several fixing holes 7. By inserting the bolts into the fixing holes 7 on the fixing bracket 6, the lower mold body 1 and the upper mold body 2 can be installed on the injection molding machine.

[0061] Working principle: Through the support tube 15, the operator puts the molten plastic into the support tube 15. The molten plastic enters the injection cavity 9 through the needle valve 14 and the fixed tube 13. The needle valve 14 can make the flow of molten plastic used in each injection the same, with a high degree of standardization.

[0062] Secondly, the pressure carried by the molten plastic allows it to enter the interior of the upper cavity 5 of the lower mold body 1 through the overflow valve 10. After the lower mold body 1 and the upper mold body 2 are closed, the positioning pin 16 presses the movable plate 22, causing the pressure rod 23 to move downward and contact the top surface of the pressure sensor 24. Then the molten plastic enters the interior of the cavity 5. If the pressure of the molten plastic is too high, the upper mold body 2 and the lower mold body 1 will separate. After the pressure sensor 24 does not sense the pressure, it will trigger the alarm light 54 to sound an alarm.

[0063] Next, by introducing water into the Y-type diversion valve 18, the water entering the Y-type diversion valve 18 flows evenly from both sides into both sides of the cooling channel 17. This ensures that the amount of water in contact with both sides of the cavity 5 is the same, guaranteeing consistent cooling efficiency on both sides of the plastic part. The infrared thermometer 12 can measure the overall temperature of the plastic part. By setting a threshold for the infrared thermometer 12, the part can only be ejected when the temperature at any point on the plastic part is below the threshold.

[0064] Meanwhile, the support cylinder 38 can be driven to move upward by the miniature electric actuator 44. After the multiple support cylinders 38 are adjusted to the appropriate height, the miniature motor 41 drives the triangular block 55 to rotate. The rotation of the triangular block 55 causes the connecting rod 45 to drive the sliding plate 46 to move outward. The outward movement of the sliding plate 46 causes the abutment plate 42 to abut against the inner wall of the support cylinder 38, thereby determining the height of the support cylinder 38. The plastic part is ejected by multiple support cylinders 38 of different heights to avoid stress concentration on the plastic part.

[0065] Finally, by lifting the top block 27 upwards, the two top blocks 27 and the ejector rod 29 can move upwards along the fixing ring 28, while the second spring 30 is compressed. After the plastic part is ejected, the top block 27 and the ejector rod 29 are reset under the action of the second spring 30, which facilitates the continuous use of the lower mold body 1 and the upper mold body 2 for injection molding.

[0066] The above are merely preferred embodiments 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 injection mold characterized in that, Include: The top surface of the lower mold body (1) is provided with an upper mold body (2), the top surface of the upper mold body (2) is provided with a cavity (5) for forming, the top surface of the upper mold body (2) is fixedly installed with a support frame (3), and the top surface of the support frame (3) is fixedly installed with a connecting seat (4); A plurality of positioning columns (16) are fixedly installed on the bottom surface of the upper mold body (2) for positioning the upper mold body (2); The ejection mechanism (8) is arranged on the bottom surface of the lower mold body (1) and is used for ejecting the molded plastic parts; The ejection mechanism (8) comprises a cooling channel (17) formed in the top surface of the lower mold body (1), one side of the lower mold body (1) is fixedly installed with a Y-type flow divider (18), one side of the lower mold body (1) is fixedly installed with a water outlet pipe (19) for draining water, the water outlet pipe (19) is communicated with the cooling channel (17), the top surface of the lower mold body (1) is provided with an installation groove (11), and the inner circular wall surface of the installation groove (11) is fixedly sleeved with an infrared thermometer (12) for temperature measurement; The ejection mechanism (8) also includes several mounting slots (26), each of which is formed on the inner bottom surface of the cavity (5). Two top blocks (27) are movably fitted onto the inner circular wall of each mounting slot (26). A top rod (29) is fixedly installed between the two top blocks (27). A fixing ring (28) is fixedly fitted onto the inner circular wall of each mounting slot (26). The top rod (29) is slidably connected to the fixing ring (28). A spring (30) is fitted onto the outer circular wall of the top rod (29). A mounting plate (31) is provided on the bottom surface of the lower mold body (1). The mounting plate (31) has several support cylinders (38) on its top surface. A mounting plate (39) is provided on the inner circular wall of each support cylinder (38). A triangular block (55) is rotatably connected to the top surface of the mounting plate (39). A micro motor (41) for driving the triangular block (55) to rotate is mounted on the bottom surface of the mounting plate (39). One end of the drive shaft of the micro motor (41) passes through the mounting plate (39) and is rotatably connected to the bottom surface of the triangular block (55). Several slide rails (48) are fixedly mounted on the top surface of the mounting plate (39). The slide rails (48) are internally slidably connected... A slider (50) is connected to a sliding plate (46) fixedly installed on the top surface of the slider (50). An abutment plate (42) is fixedly installed on one side of the sliding plate (46). Several connecting rods (45) are rotatably connected to the top surface of the triangular block (55). Two limiting blocks (47) are fixedly installed on one side of the sliding plate (46). One end of the connecting rod (45) is rotatably connected to the two limiting blocks (47). A support roller (43) is connected to the top surface of the micro electric actuator (44). A connecting plate (49) is fixedly installed on the top surface of the support roller (43). The outer circular wall of the connecting plate (49) is fixedly mounted with... The device is equipped with several support boxes (51), and a support bar (52) is slidably connected inside the support box (51). One side of the support bar (52) is fixedly connected to the inner circular wall of the abutment plate (42). A miniature electric actuator (44) for driving the support cylinder (38) to move is fixedly installed on the top surface of the connecting plate (49). The top surface of the telescopic shaft of the miniature electric actuator (44) is fixedly connected to the inner top surface of the support cylinder (38). Several support blocks (40) are fixedly installed on the outside of the mounting plate (39). The bottom surface of the support block (40) is fixedly connected to the bottom surface of the mounting plate (31).

2. An injection mold according to claim 1, characterized in that: The top and bottom surfaces of the support box (51) are provided with sliding holes (53), and the top and bottom surfaces of the support strip (52) are fixedly installed with limiting blocks (33), and the limiting blocks (33) are slidably connected to the sliding holes (53).

3. An injection mold according to claim 1, characterized in that: The top surface of the lower mold body (1) is provided with a plurality of support grooves (20), the outer circular wall surface of the positioning column (16) is in sliding connection with the inner circular wall surface of the support groove (20), the inner circular wall surface of the support groove (20) is fixedly sleeved with a support ring (21), the inner circular wall surface of the support ring (21) is in sliding connection with a pressing rod (23), the top surface of the pressing rod (23) is fixedly installed with a movable disc (22), the outer circular wall surface of the support ring (21) is sleeved with a spring (25), the inner bottom surface of the support groove (20) is fixedly installed with a pressure sensor (24), and the top surface of the upper mold body (2) is fixedly installed with an alarm lamp (54) for alarming.

4. An injection mold according to claim 2, characterized in that: The bottom surface of the lower mold body (1) is fixedly installed with two base plates (34), one side of the base plate (34) is provided with a support hole (35), both sides of the mounting plate (31) are fixedly installed with movable blocks (37), the inside of the support hole (35) is fixedly installed with a support rod (36) for limiting the movement of the movable block (37), and the movable block (37) is in sliding connection with the support rod (36).

5. An injection mold according to claim 1, characterized in that: The top surface of the upper mold body (2) is provided with an injection cavity (9) for feeding, and the inner circular wall surface of the injection cavity (9) is fixedly sleeved with an overflow valve (10).

6. An injection mold according to claim 5, characterized in that: The top surface of the upper mold body (2) is fixedly installed with a fixed tube (13), one end of the fixed tube (13) is fixedly sleeved with a needle valve (14) for controlling flow, and the inner circular wall surface of the needle valve (14) is fixedly sleeved with a support tube (15).

7. An injection mold according to claim 1, characterized in that: Both sides of the lower mold body (1) are fixedly installed with a fixed frame (6) through bolts, and the inner bottom surface of the fixed frame (6) is provided with a plurality of fixed holes (7).

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