Injection mold

Abstract

The invention 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, and 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, the Y-shaped diverter valve, the cooling channel, the infrared thermometer and the water outlet pipe are matched with one another, so that shrinkage wrinkles, caused by non-uniform cooling, of a plastic part can be reduced; through mutual cooperation of the upper mold body, the supporting cylinders, micro electric push rods, micro motors, triangular blocks, supporting rollers, connecting discs, connecting rods, ejector blocks, fixing rings, second springs, ejector rods, limiting blocks, sliding plates, sliding strips, sliding rails, abutting plates, supporting strips and supporting boxes, the heights of the multiple supporting cylinders can be adjusted, and the ejection stroke of all parts of a complex plastic part is optimized; ejection force is evenly dispersed, deformation of the plastic part is reduced, and the effect of ejecting the plastic part is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold. Background Art

[0002] The injection mold is a key tool used in the injection molding process to manufacture plastic products. It is a precision metal mold that uses a specific structure and design to inject molten plastic material into it. After cooling and solidifying, it forms a plastic product with a certain shape, size and function. The design and manufacture of injection molds have a decisive influence on the quality, production efficiency and cost of injection molded parts. The plastic particles are heated to a molten state in an injection molding machine. Secondly, the molten plastic is injected into the mold cavity through the nozzle of the injection molding machine. The plastic is cooled and solidified in the mold cavity to form the desired shape. The mold is opened and the molded plastic product is taken out. The injection mold is an indispensable tool in the modern plastic processing industry. Its design and manufacturing level directly affects the quality, production efficiency and cost of injection molded parts. After searching, it is found that there are problems with the injection mold in the prior art. During the use of the existing injection mold, the molten plastic enters the mold, and the cooling water channel on the mold cools the plastic part through circulating water. The cooling water channel generally surrounds the injection cavity, resulting in the center of the plastic part not being completely cooled after the outside is cooled. This may cause the plastic part to deform during the subsequent ejection process. At the same time, the plastic part formed in the mold will be ejected by multiple ejectors at the same time, but some plastic parts may contain more reinforcing ribs and complex shapes. The ejector pins are thinner and have a smaller contact area with the plastic part, resulting in the ejection force being concentrated in a local area. This local stress concentration will cause the plastic part to deform or crack during the ejection process. On the other hand, during one-time ejection, the ejection force may not be evenly distributed on the plastic part. This uneven ejection force will cause the local force of the plastic part to be too large, which will cause warping and poor ejection effect. Therefore, based on the above search and combined with the prior art, an injection mold is proposed to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide an injection mold having the advantages of good molding effect, good ejection effect and strong stability, so as to solve the problem proposed in the above background technology that the cooling water channel generally surrounds the injection cavity, resulting in that the center position of the plastic part may not be completely cooled after the outside 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 warping of the plastic part.

[0004] To achieve the above object, the present invention provides the following technical solutions: An injection mold comprises a lower mold body, the top surface of which is provided with an upper mold body, the top surface of which is provided with a cavity for molding, the top surface of which is fixedly mounted with a support frame, the top surface of which is fixedly mounted with a connecting seat; a plurality of positioning columns, which are all fixedly mounted on the bottom surface of the upper mold body for positioning the upper mold body; an ejection mechanism, which is arranged on the bottom surface of the lower mold body for ejecting a molded plastic part; the ejection mechanism comprises a cooling channel, which is provided on the top surface of the lower mold body, a Y-type diverter valve is fixedly mounted on one side of the lower mold body, a water outlet pipe for drainage is fixedly mounted on one side of the lower mold body, the water outlet pipe is communicated with the cooling channel, a mounting groove is provided on the top surface of the lower mold body, and an infrared thermometer for temperature measurement is fixedly sleeved on the inner circular wall surface of the mounting groove.

[0005] Furthermore, the ejection mechanism also includes a plurality of mounting grooves II, and the plurality of mounting grooves II are all opened on the inner bottom surface of the cavity; the inner circular wall surface of the mounting groove II is movably sleeved with two ejector blocks; a ejector rod is fixedly installed between the two ejector blocks; the inner circular wall surface of the mounting groove II is fixedly sleeved with a fixing ring; the ejector rod is slidably connected with the fixing ring; the outer circular wall surface of the ejector rod is sleeved with a spring II; the bottom surface of the lower mold body is provided with a mounting plate; the top surface of the mounting plate is provided with a plurality of supporting cylinders; the inner circular wall surface of the supporting cylinder is provided with a mounting disk; the top surface of the mounting disk is rotatably connected with a triangular block; the bottom surface of the mounting disk is provided with a micro motor for driving the triangular block to rotate; one end of the micro motor driving shaft passes through the mounting plate and is rotatably connected with the bottom surface of the triangular block; the top surface of the mounting plate is fixedly installed with a plurality of slide rails; the inner sliding surface of the slide rails The top surface of the micro-electric push rod is connected to a support roller, and the top surface of the micro-electric push rod is fixedly installed with a sliding plate, and one side of the sliding plate is fixedly installed with an abutment plate, and the top surface of the triangular block is rotatably connected to a plurality of connecting rods, and one side of the sliding plate is fixedly installed with two limit blocks. One end of the connecting rod is rotatably connected to the two limit blocks. The top surface of the micro-electric push rod is connected to a support roller, and the top surface of the support roller is fixedly installed with a connecting plate, and a plurality of support boxes are fixedly installed on the outer circular wall surface of the connecting plate. The inner surface of the support box is slidably connected with a support strip, and one side of the support strip is fixedly connected to the inner circular wall surface of the abutment plate. The top surface of the connecting plate is fixedly installed with a micro-electric push rod for driving the support tube to move, and the top surface of the telescopic shaft of the micro-electric push rod is fixedly connected to the inner top surface of the support tube, and a plurality of support blocks are fixedly installed on the outside of the mounting plate, and the bottom surface of the support block is fixedly connected to the bottom surface of the mounting plate.

[0006] Furthermore, the top surface and the bottom surface of the support box are both provided with sliding holes, and the top surface and the bottom surface of the support bar are both fixedly mounted with limiting blocks, and the limiting blocks are slidably connected to the sliding holes.

[0007] Furthermore, a plurality of supporting grooves are provided on the top surface of the lower mold body, the outer circular wall surface of the positioning column is slidably connected to the inner circular wall surface of the supporting groove, the inner circular wall surface of the supporting groove is fixedly sleeved with a supporting ring, the inner circular wall surface of the supporting ring is slidably connected with a pressure rod, a movable disk is fixedly installed on the top surface of the pressure rod, a spring is sleeved on the outer circular wall surface of the support ring, a pressure sensor is fixedly installed on the inner bottom surface of the supporting groove, and an alarm light for alarm is fixedly installed on the top surface of the upper mold body.

[0008] Furthermore, two base plates are fixedly mounted on the bottom surface of the lower mold body, a support hole is opened on one side of the base plate, movable blocks are fixedly mounted on both sides of the mounting plate, support rods for limiting the movement of the movable blocks are fixedly mounted inside the support holes, and the movable blocks are slidably connected to the support rods.

[0009] Furthermore, an injection cavity for feeding is provided on the top surface of the upper mold body, and an overflow valve is fixedly sleeved on the inner circular wall surface of the injection cavity.

[0010] Furthermore, a fixed tube is fixedly installed on the top surface of the upper mold body, a needle valve for controlling flow is fixedly sleeved on one end of the fixed tube, and a support tube is fixedly sleeved on the inner circular wall surface of the needle valve.

[0011] Furthermore, fixing frames are fixedly mounted on both sides of the lower mold body by bolts, and a plurality of fixing holes are formed on the inner bottom surface of the fixing frames.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The upper mold body, lower mold body, cavity, Y-type diverter valve, cooling channel, infrared thermometer and water outlet pipe cooperate with each other to reduce shrinkage wrinkles caused by uneven cooling of plastic parts and prevent deformation during ejection of plastic parts. By cooperating with each other, 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 can adjust the height of multiple support cylinders, optimize the ejection stroke of each part of complex plastic parts, evenly disperse the ejection force, reduce the deformation of plastic parts, achieve the ejection effect of plastic parts, and help to produce plastic parts using the lower mold body and the upper mold body.

[0013] The upper mold body and the lower mold body can be positioned by cooperating with each other through the upper mold body, the lower mold body, the supporting groove and the positioning column. The positioning column, the supporting groove, the movable plate, the pressure rod, the spring 1, the pressure sensor and the alarm light can be coordinated with each other to alarm when the injection pressure is too high, thereby preventing unqualified plastic parts from being mixed with other qualified plastic parts and improving the quality of the entire batch of plastic parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the installation structure of the injection cavity and the overflow valve of the present invention; Figure 3 It is a bottom view schematic diagram of the upper mold body structure of the present invention; Figure 4 It is a schematic diagram of the connection structure between the Y-type diverter valve and the lower mold body of the present invention; Figure 5 It is a schematic diagram of the installation structure of the cooling channel and the water outlet pipe of the present invention; Figure 6 for Figure 5 A is a magnified schematic diagram of the local structure; Figure 7 It is a cross-sectional schematic diagram of the connection structure between the top block and the second mounting groove of the present invention; Figure 8 It is a bottom view schematic diagram of the connection structure between the mounting plate and the second connecting seat of the present invention; Fig. 9 It is a schematic diagram of the installation structure of the support cylinder and the abutment plate of the present invention; Fig.10 It is a schematic diagram of the support roller structure of the present invention; Fig.11 for Fig.10 A magnified schematic diagram of the local structure of B; Fig.12 for Fig.10 The enlarged schematic diagram of the local structure of C in the middle; Fig.13 It is a schematic diagram of the connection structure between the mounting plate and the slide rail of the present invention.

[0015] In the figure: 1. lower mold body; 2. upper mold body; 3. support frame; 4. connecting seat 1; 5. cavity; 6. fixing frame; 7. fixing hole; 8. ejector mechanism; 9. injection cavity; 10. overflow valve; 11. mounting slot 1; 12. infrared thermometer; 13. fixing pipe; 14. needle valve; 15. support pipe; 16. positioning column; 17. cooling channel; 18. Y-type diverter valve; 19. water outlet pipe; 20. support slot; 21. support ring; 22. movable disk; 23. pressure rod; 24. pressure sensor; 25. spring 1; 26. mounting slot 2; 27. ejector block; 28. Fixed ring; 29. ​​Push rod; 30. Spring 2; 31. Mounting plate; 32. Connecting seat 2; 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. Micro motor; 42. Abutment plate; 43. Support roller; 44. Micro electric push rod; 45. Connecting rod; 46. Sliding plate; 47. Limiting block; 48. Slide rail; 49. Connecting plate; 50. Slide bar; 51. Support box; 52. Support bar; 53. Sliding hole; 54. Warning light; 55. Triangular block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In a typical implementation of this application, please refer to Figures 1 to 13 , an injection mold, comprising a lower mold body 1, an upper mold body 2 is arranged on the top surface of the lower mold body 1, a cavity 5 for molding is opened on the top surface of the upper mold body 2, a support frame 3 is fixedly installed on the top surface of the upper mold body 2, a connecting seat 4 is fixedly installed on the top surface of the supporting frame 3, and two circular holes are opened on the top surface of the connecting seat 4, and a hydraulic cylinder can be connected to the upper mold body 2 and the supporting frame 3 through the connecting seat 4, and the upper mold body 2 can be moved by the hydraulic cylinder, and 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, and an ejection mechanism 8 is arranged on the bottom surface of the lower mold body 1 for ejecting the molded plastic part; The ejection mechanism 8 includes a cooling channel 17, which is provided 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 water outlet pipe 19 for drainage is fixedly installed on one side of the lower mold body 1. The water outlet pipe 19 is connected to the cooling channel 17. A mounting 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 surface of the mounting groove 11. Among them, the molten plastic enters the interior of the upper cavity 5 of the upper mold body 2. By connecting water to the interior of the Y-type diverter valve 18, the water entering the interior of the Y-type diverter valve 18 flows out evenly from both sides into the two sides of the cooling channel 17. This makes the amount of water contacted by both sides of the cavity 5 the same, ensuring that the cooling efficiency on 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 value for the infrared thermometer 12, the plastic part can be ejected only when the temperature at any location on the plastic part is lower than the threshold value.

[0018] The ejection mechanism 8 also includes a plurality of mounting grooves 26, which are all provided on the inner bottom surface of the cavity 5. There are six mounting grooves 26 in total, four mounting grooves 26 are respectively located at the four corners of the cavity 5, and the other two are located in the middle. Two ejector blocks 27 are movably sleeved on the inner circular wall surface of the mounting groove 26. The ejector blocks 27 have a large surface area and are not easy to penetrate into the plastic parts when the plastic parts are ejected. An ejector rod 29 is fixedly installed between the two ejector blocks 27. A fixing ring 28 is fixedly sleeved on the inner circular wall surface of the mounting groove 26. The ejector rod 29 is slidably connected to the fixing ring 28. A spring 20 is sleeved on the outer circular wall surface of the ejector rod 29. The spring 20 can provide a reset force for the ejector block 27 and the ejector rod 29. One end of the spring 20 is fixedly connected to the bottom surface of the fixing ring 28, and the other end of the spring 20 is fixedly connected to the top surface of the ejector block 27 located below. Among them, by pushing up the top block 27, the two top blocks 27 and the top rod 29 can be moved upward along the fixing ring 28, and the spring 2 30 is compressed at the same time. After the plastic parts are discharged, the top block 27 and the top rod 29 are reset under the action of the spring 2 30, which is convenient for continuous use; 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 a plurality of support cylinders 38. The inner circumferential wall surface of the support cylinder 38 is provided with an anti-slip texture. The inner circumferential wall surface of the support cylinder 38 is provided with a mounting plate 39. The top surface of the mounting plate 39 is rotatably connected with a triangular block 55. The bottom surface of the mounting plate 39 is provided with a micro motor 41 for driving the triangular block 55 to rotate. One end of the driving shaft of the micro motor 41 passes through the mounting plate 39 and is rotatably connected with the bottom surface of the triangular block 55. The top surface of the mounting plate 39 is fixedly installed. There are several slide rails 48, and the slide rails 48 are slidably connected with slide bars 50 inside. The top surface of the slide bar 50 is fixedly installed with a slide plate 46, and one side of the slide plate 46 is fixedly installed with an abutment plate 42. The abutment plate 42 is a rubber arc structure and the outer wall is provided with an anti-slip texture to increase the friction between the inner wall of the support tube 38. The top surface of the triangular block 55 is rotatably connected with several connecting rods 45 through a rotating shaft. Two limit blocks 47 are fixedly installed on one side of the slide plate 46. One end of the connecting rod 45 is connected to the two limit blocks 47 through a rotating shaft. Rotational connection, the top surface of the micro electric push rod 44 is connected to the support roller 43 through a bearing. When the triangular block 55 rotates, the support roller 43 does not rotate. A connecting disk 49 is fixedly installed on the top surface of the support roller 43. A plurality of support boxes 51 are fixedly installed on the outer circumferential wall surface of the connecting disk 49. A support bar 52 is slidably connected to the inside of the support box 51. One side of the support bar 52 is fixedly connected to the inner circumferential wall surface of the abutment plate 42. The support box 51 and the support bar 52 cooperate to limit the movement of the abutment plate 42. The top surface of the connecting disk 49 is fixedly installed. There is a micro electric push rod 44 for driving the support tube 38 to move. The top surface of the telescopic shaft of the micro electric push rod 44 is fixedly connected to the inner top surface of the support tube 38. A plurality of 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. The bottom surface of the mounting plate 31 is fixedly installed with a connecting seat 2 32. The mounting plate 31 can be driven to move by a hydraulic cylinder through the connecting seat 2 32. The micro electric push rod 44, the infrared thermometer 12 and the micro motor 41 are all controlled by a control box on the injection molding machine. When using the lower mold body 1 and the upper mold body 2 to produce a plastic part with a complex shape, the staff can adjust the height of the multiple support cylinders 38 so that the height of the multiple support cylinders 38 gradually decreases from left to right; The support tube 38 can be driven to move upward by the micro electric push rod 44. After the multiple support tubes 38 are adjusted to the appropriate heights, the micro 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 sliding plate 46 moves outward so that the abutment plate 42 abuts against the inner wall of the support tube 38, thereby determining the height of the support tube 38. Multiple support tubes 38 of different heights are used to eject the plastic part to avoid stress concentration on the plastic part.

[0019] With the above technical features, through the upper mold body 2, the staff uses a hydraulic cylinder to drive the upper mold body 2 so that the lower mold body 1 and the upper mold body 2 are molded together, and the staff injects the molten plastic into the cavity 5 between the lower mold body 1 and the upper mold body 2; The staff connects the water generated by the chiller to the Y-type diverter valve 18, and the water evenly enters the channels on the left and right sides of the cooling channel 17 through the two outlets of the Y-type diverter valve 18. The amount of water entering the left and right sides of the cooling channel 17 is the same, and the radius of the cooling channel 17 is fixed, which makes the water cool the plastic parts inside the cavity 5 at the same rate, preventing the plastic parts from cooling faster or slower at some positions due to different water amounts, reducing shrinkage wrinkles caused by uneven cooling of the plastic parts, and achieving good molding effects. 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 the external water collection pipe, thereby reducing water resource consumption; 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 value for the infrared thermometer 12. Only when the temperature of each part on the plastic part is lower than the threshold value, the plastic part is ejected, so as to prevent the temperature of the plastic part near the center from being high while the temperature of other areas is low, and to avoid deformation of the plastic part during the subsequent ejection process; Secondly, the staff adjusts the height of the multiple support cylinders 38 according to the shape of the plastic part, so that the height of the multiple support cylinders 38 is reduced from left to right in turn. 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 to drive the support cylinder 38 to move upward. The multiple support cylinders 38 are moved to a suitable height in turn through the equipment program. The equipment program starts the micro motor 41. The driving shaft of the micro motor 41 rotates to drive the triangular block 55 to rotate. At this time, the support roller 43 and the connecting plate 49 do not rotate; The rotation of the triangular block 55 drives the connecting rod 45 to rotate, and the rotation of the connecting rod 45 drives the sliding plate 46 to move outward through the limit block 47. The outward movement of the sliding plate 46 also causes the slide bar 50 to move outward inside the slide rail 48. The slide rail 48 and the slide bar 50 cooperate to limit 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 to prevent the upper end of the abutment plate 42 from shaking. The outward movement of multiple abutment plates 42 will abut the inner wall of the support tube 38 to determine the position of the support tube 38, and prevent the support tube 38 from moving slightly downward due to a large load when ejecting the plastic part; The staff uses an external hydraulic cylinder to drive the mounting plate 31 to move upward, and the mounting plate 31 moves upward to drive the multiple support cylinders 38 to move upward. The height of the multiple support cylinders 38 gradually decreases from left to right, so the top block 27 on the left side of the upper mold body 2 is first lifted up, which makes the top block 27 drive the ejector rod 29 to move upward inside the fixing ring 28 and compress the spring 2 30 at the same time. The left top surface 27 moves upward so that the left side of the plastic part is first lifted up, 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", first ejecting the edge of the plastic part, and then gradually ejecting the middle part, so as to evenly disperse the ejection force and reduce the deformation of the plastic part; In addition, the ejection method recorded in this scheme can also design different ejection strokes according to the shapes of different parts of the plastic parts to avoid production problems caused by insufficient or excessive local ejection. Taking large injection molded parts as an example, the ejection method recorded in this scheme can shorten the overall ejection time and improve production efficiency. In this process, the cooling rate is ensured to be the same by allowing the same amount of water to enter the left and right sides of the cooling channel 17, thereby reducing shrinkage wrinkles on the plastic parts caused by uneven cooling and achieving a good molding effect; the overall temperature of the plastic parts is detected by the infrared thermometer 12, and the plastic parts are ejected only when the temperature at various locations on the plastic parts is lower than the threshold value, thereby preventing deformation of the plastic parts during the ejection process; by adjusting the heights of the multiple support cylinders 38, the ejection stroke of each part of the complex plastic parts is optimized, the ejection force is evenly dispersed, and the deformation of the plastic parts is reduced, thereby achieving the ejection effect on the plastic parts, which is helpful for producing plastic parts using the lower mold body 1 and the upper mold body 2.

[0020] 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, which are slidably connected to the sliding holes 53. The cooperation between the limiting blocks 33 and the sliding holes 53 can prevent the support bar 52 from detaching.

[0021] Specifically, by setting the abutment plate 42, the abutment plate 42 moves outward to drive the support bar 52 to move inside the support box 51, and at the same time, the limiting block 33 moves inside the support bar 52. The limiting block 33 and the support bar 52 cooperate with each other to limit the support bar 52 and prevent the support bar 52 from detaching from the support box 51.

[0022] As a preferred implementation in this embodiment, please refer to Figures 1 to 8A plurality of support grooves 20 are provided on the top surface of the lower mold body 1, the outer circular wall surface of the positioning column 16 is slidably connected to 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 slidably connected with a pressure rod 23, and a movable disk 22 is fixedly installed on the top surface of the pressure rod 23, and a spring 25 is sleeved on the outer circular wall surface of the support ring 21, one end of the spring 25 is fixedly connected to the bottom surface of the movable disk 22, and 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 inner bottom surface of the support groove 20, and an alarm light 54 for alarm is fixedly installed on the top surface of the upper mold body 2, and the pressure sensor 24 and the alarm light 54 are both connected to the control box of the injection molding machine.

[0023] Among them, after the lower mold body 1 and the upper mold body 2 are molded together, the positioning column 16 squeezes the movable disk 22 so that the pressure rod 23 moves downward and contacts the top surface of the pressure sensor 24, and 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 are separated at this time, and the pressure sensor 24 will trigger the alarm light 54 to alarm after not sensing the pressure.

[0024] Specifically, through the setting of the upper mold body 2, after the staff puts the upper mold body 2 and the lower mold body 1 together, the positioning column 16 on the upper mold body 2 enters the interior of the support groove 20 on the lower mold body 1, which makes the positioning column 16 squeeze the movable disk 22. The movable disk 22 is squeezed to drive the pressure rod 23 to move downward and at the same time make the spring 25 compressed. The downward movement of the pressure rod 23 will squeeze the pressure sensor 24, and the pressure sensor 24 will detect the pressure. Then the staff will inject the molten plastic into the interior of the upper cavity 5 of the lower mold body 1. If the pressure of the molten plastic is too large, the pressure will push the upper mold body 2 upward, and the upper mold body 2 moves upward to drive the positioning column 16 to move upward. After the positioning column 16 moves upward, the force of the spring 25 makes the movable disk 22 move upward together with the pressure rod 23. After the pressure rod 23 is separated from the pressure sensor 24, the pressure sensor 24 cannot detect the pressure and will start the alarm light 54 to alarm, indicating that the injection molding is unqualified and the quality of the plastic parts is not up to standard. It prevents the unqualified plastic parts from being mixed with other qualified plastic parts, thereby improving the quality of the entire batch of plastic parts.

[0025] Two base plates 34 are fixedly installed on the bottom surface of the lower mold body 1, and a support hole 35 is opened on one side of the base plate 34. Movable blocks 37 are fixedly installed on both sides of the mounting plate 31. Support rods 36 for limiting the movement of the movable blocks 37 are fixedly installed inside the support holes 35. The movable blocks 37 are slidably connected to the support rods 36. The movement path of the mounting plate 31 can be limited by the cooperation of the support holes 35, the support rods 36 and the movable blocks 37.

[0026] Specifically, by setting up the mounting plate 31, the mounting plate 31 moves upward to drive the movable block 37 to move along the support rod 36 inside the side support hole 35 of the base plate 34. The support hole 35, the support rod 36 and the movable block 37 cooperate to limit the moving path of the mounting plate 31, thereby achieving a limiting effect on the mounting plate 31.

[0027] An injection cavity 9 for feeding is provided on the top surface of the upper mold body 2, and an overflow valve 10 is fixedly sleeved on the inner circular wall surface of the injection cavity 9. The overflow valve 10 can ensure that the flow of the fluid during the injection process is more stable.

[0028] Specifically, through the set injection cavity 9, the injection molding machine injects the molten plastic into the interior of the injection cavity 9. The pressure carried by the molten plastic enables it to enter the interior of the upper cavity 5 of the lower mold body 1 through the overflow valve 10. The overflow valve 10 can ensure that the flow of the fluid during the injection molding process is smoother, avoiding fluid turbulence or bubble inclusion caused by excessive pressure, thereby improving the molding quality of the product and achieving the injection molding effect of the plastic part.

[0029] A fixed tube 13 is fixedly installed on the top surface of the upper mold body 2, and a needle valve 14 for controlling the flow is fixedly sleeved at one end of the fixed tube 13. The needle valve 14 accurately controls the fluid flow through a small valve core with a pointed end. A support tube 15 is fixedly sleeved on the inner circular wall surface of the needle valve 14, and a flange is fixedly sleeved on the outer circular wall surface of the support tube 15. The external pipeline can be connected to the support tube 15 through the flange.

[0030] Specifically, through the support tube 15, the staff connects the molten plastic to the interior of the support tube 15, and the staff adjusts the needle valve 14 to control the flow of the molten plastic that can pass through the needle valve 14 in a single injection molding. The material with a fixed flow rate enters the interior of the cavity 5 through the fixed tube 13 and the injection cavity 9, preventing excessive material and improving the standardization of plastic parts.

[0031] The two sides of the lower mold body 1 are fixed with fixing frames 6 by bolts, and the inner bottom surface of the fixing frame 6 is provided with a plurality of fixing holes 7. Through the setting of the fixing frame 6, the staff puts the bolts into the fixing holes 7 on the fixing frame 6, and the lower mold body 1 and the upper mold body 2 can be installed on the injection molding machine for use.

[0032] Working principle: Through the support tube 15, the staff connects the molten plastic to the inside of the support tube 15, and 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 rate of the molten plastic used for each injection the same, with a high degree of standardization; Secondly, the pressure carried by the molten plastic enables 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 molded together, the positioning column 16 squeezes the movable plate 22 to make the pressure rod 23 move downward to contact the top surface of the pressure sensor 24, and 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 are separated at this time, and the pressure sensor 24 will not feel the pressure and will trigger the alarm light 54 to alarm; Next, by connecting water to the inside of the Y-type diverter valve 18, the water entering the Y-type diverter valve 18 flows out from both sides evenly into both sides of the cooling channel 17, so that the amount of water contacted by both sides of the cavity 5 is the same, ensuring that the cooling efficiency of both sides of the plastic part is consistent. The infrared thermometer 12 can measure the temperature of the entire plastic part. By setting a threshold value for the infrared thermometer 12, the plastic part can be ejected only when the temperature of each part on the plastic part is lower than the threshold value. At the same time, the support cylinder 38 can be driven to move upward by the micro electric push rod 44. After the multiple support cylinders 38 are adjusted to appropriate heights, the micro 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 sliding plate 46 moves outward so that the abutment plate 42 abuts against the inner wall of the support cylinder 38, thereby determining the height of the support cylinder 38. The plastic parts are ejected using multiple support cylinders 38 of different heights to avoid stress concentration on the plastic parts. Finally, by pushing the top block 27 upward, the two top blocks 27 and the top rod 29 can be moved upward along the fixing ring 28 while the spring 2 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 spring 2 30, so that the lower mold body 1 and the upper mold body 2 can be continuously used for injection molding.

[0033] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection mold, characterized in that: include: A lower mold body (1), wherein an upper mold body (2) is arranged on the top surface of the lower mold body (1), a cavity (5) for molding is provided on the top surface of the upper mold body (2), a support frame (3) is fixedly mounted on the top surface of the upper mold body (2), and a connecting seat (4) is fixedly mounted on the top surface of the support frame (3); A plurality of positioning columns (16), each of the plurality of positioning columns (16) being fixedly mounted on the bottom surface of the upper mold body (2) and used for positioning the upper mold body (2); An ejection mechanism (8), the ejection mechanism (8) being arranged on the bottom surface of the lower mold body (1) and being used for ejecting the molded plastic part; The ejection mechanism (8) comprises a cooling channel (17), the cooling channel (17) being provided on the top surface of the lower mold body (1), a Y-shaped diverter valve (18) being fixedly mounted on one side of the lower mold body (1), a water outlet pipe (19) for drainage being fixedly mounted on one side of the lower mold body (1), the water outlet pipe (19) being connected to the cooling channel (17), a mounting groove (11) being provided on the top surface of the lower mold body (1), an infrared thermometer (12) for temperature measurement being fixedly sleeved on the inner circular wall surface of the mounting groove (11).

2. An injection mold according to claim 1, characterized in that: The ejection mechanism (8) further comprises a plurality of second mounting grooves (26), wherein the plurality of second mounting grooves (26) are all provided on the inner bottom surface of the cavity (5), the inner circular wall surface of the second mounting groove (26) is movably sleeved with two ejection blocks (27), a ejection rod (29) is fixedly installed between the two ejection blocks (27), the inner circular wall surface of the second mounting groove (26) is fixedly sleeved with a fixing ring (28), the ejection rod (29) is slidably connected to the fixing ring (28), the outer circular wall surface of the ejection rod (29) is sleeved with a second spring (30), and the bottom surface of the lower mold body (1) is provided with a mounting plate (31). The top surface of the mounting plate (31) is provided with a plurality of support cylinders (38), the inner circumferential wall surface of the support cylinder (38) is provided with a mounting plate (39), the top surface of the mounting plate (39) is rotatably connected with a triangular block (55), the bottom surface of the mounting plate (39) is provided 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 with the bottom surface of the triangular block (55), the top surface of the mounting plate (39) is fixedly provided with a plurality of slide rails (48), the inner surface of the slide rails (48) is slidably connected to the bottom surface of the triangular block (55), and the micro motor (41) is provided with a plurality of slide rails (48) which are fixedly connected to the bottom surface of the triangular block (55). A slide bar (50) is provided, a slide plate (46) is fixedly mounted on the top surface of the slide bar (50), a contact plate (42) is fixedly mounted on one side of the slide plate (46), a plurality of connecting rods (45) are rotatably connected to the top surface of the triangular block (55), two limit blocks (47) are fixedly mounted on one side of the slide plate (46), one end of the connecting rod (45) is rotatably connected to the two limit blocks (47), a support roller (43) is connected to the top surface of the micro electric push rod (44), a connection disk (49) is fixedly mounted on the top surface of the support roller (43), and an outer circumferential wall surface of the connection disk (49) is fixedly mounted A plurality of support boxes (51) are installed, the support boxes (51) are internally slidably connected with support bars (52), one side of the support bars (52) is fixedly connected to the inner circular wall surface of the abutment plate (42), a micro electric push rod (44) for driving the support tube (38) to move is fixedly installed on the top surface of the connection disk (49), the top surface of the telescopic shaft of the micro electric push rod (44) is fixedly connected to the inner top surface of the support tube (38), and a plurality of support blocks (40) are fixedly installed on the outside of the mounting disk (39), and the bottom surface of the support block (40) is fixedly connected to the bottom surface of the mounting plate (31).

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

4. The 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 slidably connected to 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 slidably connected with a pressure rod (23); a movable disk (22) is fixedly mounted on the top surface of the pressure rod (23); a spring 1 (25) is sleeved on the outer circular wall surface of the support ring (21); a pressure sensor (24) is fixedly mounted on the inner bottom surface of the support groove (20); and an alarm light (54) for alarming is fixedly mounted on the top surface of the upper mold body (2).

5. The injection mold according to claim 2, characterized in that: Two base plates (34) are fixedly mounted 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 mounted on both sides of the mounting plate (31); support rods (36) for limiting the movement of the movable blocks (37) are fixedly mounted inside the support holes (35); and the movable blocks (37) are slidably connected to the support rods (36).

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

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

8. The injection mold according to claim 1, characterized in that: A fixing frame (6) is fixedly mounted on both sides of the lower mold body (1) by means of bolts, and a plurality of fixing holes (7) are provided on the inner bottom surface of the fixing frame (6).

Images