High-yield laminated mold

Abstract

The invention discloses a high-yield laminated mold, and relates to the technical field of molds, the high-yield laminated mold comprises a middle mold base, external mold bases are slidably connected to the two sides of the middle mold base, mold cavities are formed in the two sides of the middle mold base, and hot runners communicating with the mold cavities are installed in the middle mold base; a cavity is formed in the middle mold base, an ejector pin penetrating through the middle mold base and extending into the cavity is slidably connected into the middle mold base, a boss is fixedly installed in the ejector pin, a positioning column used for being connected with a nut in a sleeved mode is fixedly connected to the boss, and the sealing unit comprises a sleeve and a piston plate which are slidably connected into the positioning column. The larger the internal pressure of the first sealing ring is, the tighter the first sealing ring and the inner wall of the nut is, plastic in a molten state is prevented from entering threads of the nut under the pressure, after a material is cooled and shaped, the roller and the first sealing ring can automatically restore to the original shape, the force needed by demolding ejection of a product is reduced, and the ejector pin can eject the product perfectly and conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and in particular to a high-yield stacking mold. Background Art

[0002] An injection mold is a tool used for plastic molding. The principle is to heat and melt the plastic raw material, inject it into a mold cavity with a specific shape under high pressure, and then cool and solidify it to obtain a plastic product with the same shape as the cavity.

[0003] Some products require embedded parts to be installed in the mold before injection molding. The embedded parts can improve the product's ability to bear loads. Some products require the assembly of multiple parts during the production process. By embedding nuts during injection molding, you can prepare for subsequent assembly work in advance and improve assembly efficiency.

[0004] The cavity of a traditional injection mold is provided with a boss for pre-embedded nuts. The nut is sleeved on the boss before the mold is closed. After the mold is closed, molten material is injected into the cavity. After the material is cooled and formed, the nut and the material can be tightly combined. However, the tightness between the boss and the nut in the existing mold is difficult to control. If the boss and the nut are assembled too tightly, the product requires a larger thrust for demoulding. Excessive force applied by the ejector rod can easily cause damage to the product. If the boss and the nut are not assembled tightly enough, during the injection molding process, the flow of high-pressure molten material will cause the nut to move, resulting in product scrapping. In addition, the molten material will also enter between the nut and the boss under pressure, blocking the thread of the nut, so that the produced product cannot achieve the expected effect. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the tightness between the boss and the nut in the existing mold is difficult to control, and to propose a high-yield laminated mold.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: a high-yield stacking mold: comprising a middle mold base, both sides of the middle mold base are slidably connected to the outer mold base, both sides of the middle mold base are provided with a cavity, a hot runner connected to the cavity is installed inside the middle mold base, an ejector that penetrates the middle mold base and extends into the cavity is slidably connected inside the middle mold base, a boss is fixedly installed inside the ejector, a positioning column for sleeve nuts is fixedly connected on the boss, and also includes:

[0007] A sealing unit, the sealing unit comprises a sleeve and a piston plate slidably connected to the interior of the positioning column, a push rod fixed to the piston plate is slidably connected to the interior of the threaded column, a tooth groove is provided on the exterior of the push rod, a bimetallic sheet is fixedly connected to the inner wall of the sleeve, a sealing ring 1 is fixedly sleeved on the positioning column, and a tension spring is fixedly connected between the push rod and the threaded column;

[0008] A pressure transmission assembly that provides driving force through pressure and a locking mechanism that supports locking and applies pressure to the nut;

[0009] When the cavity is under high temperature and high pressure, the bimetallic strip bends and embeds into the tooth groove, so that the pressure transmission assembly pushes the piston plate through the sleeve and the bimetallic strip, and the sealing ring 1 and the inner wall of the nut and the positioning column are pressurized and expanded, and at the same time the locking mechanism locks the nut through the supporting force.

[0010] As a further description of a high-yield stacking mold of the above technology: the pressure transmission assembly includes a movable plate slidably connected to the inside of the boss, the movable plate is internally rotatably connected to a ring part, the inner wall of the boss is provided with an inclined groove, the edge of the ring part is fixedly connected to a protrusion embedded in the inclined groove, and a spring is provided between the ring part and the boss.

[0011] As a further description of a high-yield stacking mold of the above technology: a gear ring is fixedly connected to one side of the annular member, a threaded column and a transmission gear meshing with the gear ring are rotatably connected inside the boss, and a transmission belt is connected between the transmission gear and the threaded column.

[0012] As a further description of a high-yield stacking mold of the above technology: the locking mechanism includes a positioning rod fixed to the piston plate, the interior of the positioning column is symmetrically provided with mounting grooves, the interior of the mounting groove is movably connected to a roller, and the exterior of the positioning rod is slidably connected to a support plate.

[0013] As a further description of a high-yield stacking mold of the above technology: a second spring is arranged between the support plate and the positioning rod, the top of the support plate is inclined close to the roller, and a push block is arranged on the positioning rod to push the support plate to reset.

[0014] As a further description of a high-yield stacking mold of the above technology: it also includes a cooling mechanism, which includes a mixing disk fixed inside the boss, a cooling cavity is opened inside the positioning column, the outlet of the cooling cavity is fixedly connected to a water outlet pipe, and a water inlet pipe is fixedly connected between the inlet of the cooling cavity and the mixing disk.

[0015] As a further description of a high-yield stacking mold of the above technology: one end of the push rod is fixedly connected to a plug rod, the interior of the mixing disk is rotatably connected to a spiral grooved tube, the plug rod is provided with a protrusion embedded in the groove of the spiral grooved tube, and the outside of the spiral grooved tube is fixedly connected to an impeller.

[0016] As a further description of a high-yield stacking mold of the above technology: a vibration filling structure is arranged between the sleeve and the positioning column, and the vibration filling structure includes a limit frame fixed to the inner wall of the positioning column, the interior of the limit frame is fixedly connected with helical teeth, the exterior of the sleeve is fixedly connected with a mounting seat, the mounting seat is rotatably connected with a spring telescopic rod, and a torsion spring is arranged between the mounting seat and the spring telescopic rod.

[0017] As a further description of a high-yield stacking mold of the above technology: the telescopic end of the spring telescopic rod is fixedly connected with a collision block, and the collision block is in contact with the inclined surface of the helical tooth.

[0018] As a further description of a high-yield stacking mold of the above technology: washers are provided between the tension spring and the push rod, and between the spring 1 and the annular member.

[0019] In summary, due to the use of the above-mentioned technology, a high-yield stacking mold has the following beneficial effects:

[0020] During the injection molding process, as the pressure in the mold cavity increases, the greater the internal pressure of the sealing ring 1, the tighter it is with the inner wall of the nut, preventing the molten plastic from entering the thread of the nut under pressure and affecting the subsequent assembly of the product, thereby improving the processing effect of the injection molding embedded nut. At the same time, the inner wall of the nut is supported and locked by the roller, which can effectively prevent the material under high-pressure flow from driving the nut to move, thereby ensuring the tightness of the connection between the material and the nut after cooling and shaping. The roller can also apply thrust to the nut, so that the end face of the nut fits tightly with the sealing ring 2, further improving the sealing effect of the nut and preventing the material from clogging the thread. Not only that, after the material is cooled and shaped, the roller and the sealing ring 1 can automatically return to their original state, reducing the force required for product demoulding and ejection, making it easier for the ejector to eject the product intact.

[0021] During demoulding, the outer mold base and the middle mold base are separated. At this time, the elastic force of spring 1 is applied to the shaped product through the movable plate, which can assist in demoulding, further reduce the force required for product demoulding, and avoid material damage due to excessive pressure during demoulding;

[0022] The impact block makes the nut vibrate, so that the molten material around the nut can more easily enter the gap outside the nut under the action of vibration, so that the embedded nut and the material can be fully combined, improving the firmness of the connection between the nut and the material and strengthening the stability of the product after assembly;

[0023] By setting a cooling cavity in the positioning column, the nut and the surrounding materials can be cooled and shaped faster, shortening the material molding cycle, and accelerating production efficiency. In addition, the cooling rate of the material around the embedded nut can be more accurately controlled, so that the material cooling in various parts of the cavity tends to be uniform, thereby effectively reducing the warping deformation of the product and improving the dimensional accuracy and shape accuracy of the product. In addition, cooling through the cooling cavity can also increase the friction and mechanical bite force between the nut and the material, preventing the nut from loosening or falling out during use, and improving the reliability and stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An overall schematic diagram provided according to an embodiment of the present invention is shown;

[0025] Figure 2 It shows a schematic diagram of the interior of the middle mold base provided according to an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of a nut pre-embedded state according to an embodiment of the present invention is shown;

[0027] Figure 4 It shows a schematic diagram of the interior of a positioning column provided according to an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of a radial cross section of a positioning column provided in an embodiment of the present invention is shown;

[0029] Figure 6 The embodiment of the present invention provides Figure 5 Enlarged view of point A in the middle;

[0030] Figure 7 The embodiment of the present invention provides Figure 5 Sectional view in the AA direction;

[0031] Figure 8 The embodiment of the present invention provides Figure 7 Enlarged view of point B in the middle;

[0032] Fig. 9 The embodiment of the present invention provides Figure 5 Cross-sectional view in the BB direction;

[0033] Fig.10 The embodiment of the present invention provides Fig. 9 Enlarged view of point C in the middle;

[0034] Fig.11 A schematic diagram of the position of a water outlet pipe provided according to an embodiment of the present invention is shown.

[0035] Legend:

[0036] 10. Middle mold base; 11. External mold base; 12. Cavity; 13. Hot runner; 14. Ejector pin; 15. Boss; 16. Positioning column;

[0037] 20. Pressure transmission assembly; 21. Movable plate; 22. Ring member; 23. Protrusion; 24. Inclined groove; 25. Spring 1; 26. Gear ring; 27. Transmission gear; 28. Threaded column; 29. ​​Transmission belt;

[0038] 30. Sealing unit; 31. Sleeve; 32. Bimetallic strip; 33. Push rod; 331. Tooth groove; 34. Piston plate; 35. Sealing ring 1; 36. Tension spring;

[0039] 40. Locking mechanism; 41. Positioning rod; 42. Support plate; 43. Second spring; 44. Mounting groove; 45. Roller; 46. Second sealing ring;

[0040] 50. Cooling mechanism; 51. Mixing disk; 52. Water outlet pipe; 53. Water inlet pipe; 54. Cooling chamber; 55. Insert rod; 56. Protrusion; 57. Spiral groove pipe; 58. Impeller;

[0041] 60. Vibration filling structure; 61. Limiting frame; 62. Bevel teeth; 63. Mounting seat; 64. Torsion spring; 65. Spring telescopic rod; 66. Impact block. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology of a high-yield stacking mold 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.

[0043] like Figure 1-Figure 11As shown, the present invention provides a high-yield stacking mold: it includes a middle mold base 10, both sides of the middle mold base 10 are slidably connected with external mold bases 11, guide rods are arranged between the external mold base 11 and the middle mold base 10 for positioning the movement of the external mold base 11, both sides of the middle mold base 10 are also rotatably connected with gears, both sides of the external mold base 11 are fixedly installed with racks meshing with the gears, through the cooperation of the gears and the racks, when one of the external mold bases 11 is fixed, pulling the other external mold base 11 can make the two external mold bases 11 open synchronously relative to the middle mold base 10, so that the cavities 12 on both sides of the middle mold base 10 can be put into use at the same time, thereby improving the production efficiency, both sides of the middle mold base 10 are provided with cavities 12, and the interior of the middle mold base 10 is provided with a hot runner 13 connected with the cavity 12, and the hot runner 13 is connected to the discharge port of the external injection molding machine. After the middle mold base 10 and the outer mold base 11 are molded together, the injection molding machine injects the molten material into the mold cavity 12 through the hot runner 13. After the material is cooled and shaped, the middle mold base 10 and the outer mold base 11 are separated for demoulding to achieve the finalization of the plastic product. The middle mold base 10 is internally slidably connected with an ejector pin 14 that penetrates the middle mold base 10 and extends into the mold cavity 12. After the material is cooled and shaped, the middle mold base 10 and the outer mold base 11 are separated. The ejector pin 14 is driven by an external driving device to enter the mold cavity 12 to eject the product and complete the unloading. A boss 15 is fixedly installed inside the ejector pin 14. A positioning column 16 for sleeve nuts is fixedly connected to the boss 15. After the nuts are sleeved on the positioning column 16, the molten material is injected into the mold cavity 12. After the materials are cooled and shaped, they are tightly combined with the nuts. The nuts are used to facilitate the connection and assembly between products. It also includes:

[0044] The sealing unit 30 includes a sleeve 31 and a piston plate 34 which are slidably connected to the inside of the positioning column 16. A push rod 33 fixed to the piston plate 34 is slidably connected to the inside of the threaded column 28. A tooth groove 331 is provided on the outside of the push rod 33. A bimetallic strip 32 is fixedly connected to the inner wall of the sleeve 31. The bimetallic strip 32 is a composite material formed by two metals or alloys with different thermal expansion coefficients firmly bonded to each other along the entire contact surface. When the bimetallic strip 32 is heated, due to the different thermal expansion coefficients of the two metals, the expansion degrees are also different. The metal side with a larger thermal expansion coefficient expands more, and the metal side with a smaller thermal expansion coefficient expands more. The metal side expands less, which causes the bimetallic strip 32 to bend and deform. After the bimetallic strip 32 is bent by heat, it will be embedded in the tooth groove 331, so that when the sleeve 31 moves, the bimetallic strip 32 pushes the push rod 33 to move together. A sealing ring 35 is fixedly sleeved on the positioning column 16. The sealing ring 35 is hollow and the internal space is connected to the interior of the positioning column 16. When the piston plate 34 moves to increase the internal pressure of the positioning column 16, the internal pressure of the sealing ring 35 increases and expands under pressure. The sealing ring 35 is located between the nut and the positioning column 16. A tension spring 36 is fixedly connected between the push rod 33 and the threaded column 28.

[0045] A pressure transmission assembly 20 that provides driving force through pressure and a locking mechanism 40 that supports locking and applies pressure to the nut;

[0046] When the cavity 12 is under high temperature and high pressure, the bimetallic strip 32 bends and embeds into the tooth groove 331, so that the pressure transmission assembly 20 pushes the piston plate 34 through the sleeve 31 and the bimetallic strip 32, and the sealing ring 35 and the inner wall of the nut and the positioning column 16 are pressurized and expanded. At the same time, the locking mechanism 40 locks the nut through the supporting force and applies a thrust to the nut toward the boss 15.

[0047] Reference Figure 4 and Figure 7 The pressure transmission assembly 20 includes a movable plate 21 slidably connected to the inside of the boss 15, and a ring member 22 is rotatably connected inside the movable plate 21. An inclined groove 24 is provided on the inner wall of the boss 15. During injection molding, the increase in the internal pressure of the cavity 12 will cause the movable plate 21 to shrink toward the inside of the boss 15, thereby driving the ring member 22 to move together. A protrusion 23 embedded in the inclined groove 24 is fixedly connected to the edge of the ring member 22. When the ring member 22 moves, the protrusion 23 slides inside the inclined groove 24, driving the ring member 22 to deflect. A spring 25 is provided between the ring member 22 and the boss 15.

[0048] Reference Figure 4 A gear ring 26 is fixedly connected to one side of the ring member 22, and a threaded column 28 and a transmission gear 27 meshing with the gear ring 26 are rotatably connected inside the boss 15. A transmission belt 29 is transmission-connected between the transmission gear 27 and the threaded column 28. The gear ring 26 has a certain width. When the gear ring 26 moves with the ring member 22, the gear ring 26 is always in a meshing state with the transmission gear 27. Therefore, the gear ring 26 deflects with the ring member 22 and drives the transmission gear 27 to rotate at the same time. The transmission of the gear ring 26 and the transmission gear 27 can increase the number of rotations of the threaded column 28 when the ring member 22 deflects, thereby making the moving speed of the sleeve 31 more stable.

[0049] Reference Figure 5-Figure 7The locking mechanism 40 includes a positioning rod 41 fixed to the piston plate 34, a mounting groove 44 is symmetrically provided inside the positioning column 16, a roller 45 is movably connected inside the mounting groove 44, and a support plate 42 is slidably connected to the outside of the positioning rod 41. The top of the support plate 42 is inclined near the side of the roller 45, and the roller 45 can rotate inside the mounting groove 44 and move outward, so that when the support plate 42 contacts the roller 45, the roller 45 can first be pushed outward through the inclined surface, and the nut is locked by applying pressure to the nut through the roller 45 to prevent the nut from moving under the thrust of the material. A spring 43 is provided between the support plate 42 and the positioning rod 41, so that the support plate 42 can move by itself when it cannot push the roller 45 to rotate, thereby reducing the friction between the support plate 42 and the roller 45 and extending the service life of the two. A push block is provided on the positioning rod 41 to push the support plate 42 to reset. When the piston plate 34 is reset, the positioning rod 41 drives the support plate 42 to complete the reset through the push block.

[0050] Reference Figure 5 and Fig.11 , and also includes a cooling mechanism 50, the cooling mechanism 50 includes a mixing disk 51 fixed inside the boss 15, a cooling cavity 54 is opened inside the positioning column 16, the outlet of the cooling cavity 54 is fixedly connected with a water outlet pipe 52, and a water inlet pipe 53 is fixedly connected between the inlet of the cooling cavity 54 and the mixing disk 51. The mixing disk 51 and the water outlet pipe 52 are connected with the cooling system arranged inside the middle mold base 10. After the injection molding is completed, when the material in the cavity 12 is cooled and shaped by the cooling system, the cooling water enters the cooling cavity 54 through the mixing disk 51 and the water inlet pipe 53 and is finally output through the water outlet pipe 52. The cooling cavity 54 is arranged around the interior of the positioning column 16. When the cooling water passes through the cooling cavity 54, the nut and the material around the nut are cooled, so that the shaping speed of the material around the nut matches that of the other parts, effectively reducing the warping deformation of the product, increasing the friction and mechanical bite force between the nut and the material, shortening the material molding cycle, and accelerating the production efficiency.

[0051] Reference Figure 8 One end of the push rod 33 is fixedly connected to a plug rod 55, and the interior of the mixing disk 51 is rotatably connected to a spiral groove tube 57. The plug rod 55 is provided with a protrusion 56 embedded in the groove of the spiral groove tube 57, and the outside of the spiral groove tube 57 is fixedly connected to an impeller 58. When the material is cooled, the deformation recovery of the bimetallic strip 32 will cause the push rod 33 to reset under the elastic force of the tension spring 36, thereby driving the plug rod 55 to move inside the spiral groove tube 57. At this time, the protrusion 56 slides in the groove of the spiral groove tube 57 to drive the spiral groove tube 57 and the impeller 58 to rotate, so that the cooling water is evenly mixed before entering the cooling chamber 54, so that the temperature of the cooling water is uniform, and the cooling effect is improved.

[0052] Reference Fig. 9 and Fig.10 A vibration filling structure 60 is provided between the sleeve 31 and the positioning column 16. The vibration filling structure 60 includes a limit frame 61 fixed to the inner wall of the positioning column 16. The inside of the limit frame 61 is fixedly connected with a bevel tooth 62. The outside of the sleeve 31 is fixedly connected with a mounting seat 63. One side of the mounting seat 63 is closed and the other side has an opening. A spring telescopic rod 65 is rotatably connected to the mounting seat 63. The elastic force of the torsion spring 64 makes the spring telescopic rod 65 abut against the closed side of the mounting seat 63, so that the spring telescopic rod 65 is in a vertical state. A torsion spring 64 is provided between the mounting seat 63 and the spring telescopic rod 65. The telescopic end of the spring telescopic rod 65 is fixedly connected with a striker block 66. The striker block 66 fits with the inclined surface of the bevel tooth 62. The mounting seat 63 is fixedly connected with the sleeve 31. When the sleeve 31 moves, the impact block 66 will be continuously lifted by the bevel teeth 62 and collide with the inner wall of the limit frame 61 under the elastic force of the spring telescopic rod 65, so that the vibration generated by the impact is transmitted to the material around the nut, destroying the surface tension of the material and enhancing the capillary action of the material, making it easier for the material to enter the small grooves on the surface of the nut, thereby enhancing the tightness of the connection between the material and the nut after the material is cooled and formed. When the sleeve 31 is reset, the obstruction of the bevel teeth 62 will cause the impact block 66 and the spring telescopic rod 65 to deflect toward the side of the opening of the mounting seat 63, so that the impact block 66 is smoothly reset. Under the limit of the limit frame 61, the sleeve 31 cannot rotate, so the rotation of the threaded column 28 will drive the sleeve 31 to slide inside the positioning column 16.

[0053] Reference Figure 4 and Fig. 9 Washers are provided between the tension spring 36 and the push rod 33, the spring 1 25 and the annular member 22 to prevent the spring 1 25 and the tension spring 36 from being torsionally damaged when the annular member 22 and the threaded column 28 rotate.

[0054] Working principle: Before closing the mold, the nut is sleeved on the positioning column 16, and then the outer mold base 11 is moved to contact with the middle mold base 10 for closing the mold. Under the transmission of the gear and rack, the two outer mold bases 11 can be opened and closed synchronously;

[0055] The molten plastic is injected into the cavity 12 through the hot runner 13. As the material is injected into the cavity 12, the pressure and temperature inside the cavity 12 gradually increase. The high temperature causes the bimetallic strip 32 to bend and embed into the tooth groove 331. The movable plate 21 shrinks toward the inside of the boss 15 under pressure. The movable plate 21 moves to drive the annular member 22 and the protrusion 23 to move. Since the protrusion 23 slides inside the inclined groove 24 when moving, the annular member 22 deflects while moving. The gear ring 26 and the annular member 22 move synchronously to drive the transmission gear 27 to rotate, and the threaded column 28 is driven to rotate through the transmission belt 29, so that the sleeve 31 slides inside the positioning column 16 under the limit of the limit frame 61 and the spring telescopic rod 65, driving the bimetallic strip 32, the push rod 33 and the piston plate 34 to move, so that the internal pressure of the sealing ring 35 increases and expands and squeezes between the positioning column 16 and the nut, preventing the material from entering the thread groove of the nut;

[0056] When the piston plate 34 moves, it drives the positioning rod 41, the second spring 43 and the support plate 42 to move, so that the support plate 42 pushes the roller 45 outward through the inclined surface, and the roller 45 is pressed on the inner wall of the nut to lock the nut. The support plate 42 continues to move to drive the roller 45 to rotate, and pushes the nut toward the direction close to the second sealing ring 46, so that the second sealing ring 46 and the nut are tightly combined. When the nut can no longer move, the roller 45 can no longer rotate. At this time, the movement of the positioning rod 41 can only continue to compress the second spring 43, and can no longer drive the support plate 42 to move;

[0057] When the sleeve 31 moves, it drives the mounting seat 63, the spring telescopic rod 65 and the impact block 66 to move. The impact block 66 passes on the bevel teeth 62, causing the spring telescopic rod 65 to be continuously compressed and extended, driving the impact block 66 to impact the limit frame 61, causing the material around the nut to vibrate and enter the gap outside the nut. When the sleeve 31 is reset, the spring telescopic rod 65 and the impact block 66 deflect toward the side of the opening of the mounting seat 63, so that the impact block 66 no longer impacts the limit frame 61 through the elastic force of the spring telescopic rod 65.

[0058] After the injection molding is completed, the product is cooled and shaped by the cooling system. The temperature inside the cavity 12 decreases, causing the bimetallic strip 32 to recover and detach from the tooth groove 331, so that the push rod 33 loses support and resets under the elastic force of the tension spring 36, driving the insertion rod 55 to slide in the spiral groove tube 57. At this time, the protrusion 56 slides in the thread groove of the spiral groove tube 57, driving the spiral groove tube 57 and the impeller 58 to rotate, mixing the cooling water passing through the mixing disk 51, so that the temperature of the cooling water is evenly distributed. After that, the cooling water passes through the mixing disk 51, the water inlet pipe 53, the cooling cavity 54 and the water outlet pipe 52 to cool the nut and surrounding materials.

[0059] After the product is cooled and shaped, the outer mold base 11 is separated from the middle mold base 10, and the product is ejected by the ejector pin 14. At this time, the movable plate 21 assists the product to be ejected under the elastic force of the spring 25, and the movable plate 21 is reset to drive the annular part 22, the gear ring 26, the threaded column 28 and the sleeve 31 to reset.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention, according to the technology of the present invention a high-yield stacking mold and its inventive concept, make equivalent replacement or change, should be covered within the protection scope of the present invention.

Claims

1. A high-yield stacking mold, comprising a middle mold base (10), both sides of the middle mold base (10) are slidably connected to external mold bases (11), both sides of the middle mold base (10) are provided with cavities (12), a hot runner (13) is installed inside the middle mold base (10), an ejector pin (14) is slidably connected inside the middle mold base (10), a boss (15) is fixedly installed inside the ejector pin (14), a positioning column (16) for sleeve nuts is fixedly connected to the boss (15), characterized in that: Also includes: A sealing unit (30), the sealing unit (30) comprising a sleeve (31) and a piston plate (34) slidably connected to the interior of the positioning column (16); a push rod (33) fixed to the piston plate (34) is slidably connected to the interior of the threaded column (28); a tooth groove (331) is provided on the exterior of the push rod (33); a bimetallic strip (32) is fixedly connected to the inner wall of the sleeve (31); a sealing ring (35) is fixedly sleeved on the positioning column (16); and a tension spring (36) is fixedly connected between the push rod (33) and the threaded column (28); A pressure transmission assembly (20) for providing driving force through pressure, and a locking mechanism (40) for supporting locking and applying pressure to the nut; When the mold cavity (12) is under high temperature and high pressure, the bimetallic strip (32) bends and embeds into the tooth groove (331), so that the pressure transmission component (20) pushes the piston plate (34) through the sleeve (31) and the bimetallic strip (32), and the sealing ring (35) and the inner wall of the nut and the positioning column (16) are pressurized and expanded, and at the same time, the locking mechanism (40) locks the nut through the supporting force.

2. A high-yield stacking mold according to claim 1, characterized in that: The pressure transmission assembly (20) includes a movable plate (21) slidably connected to the inside of the boss (15), and a ring member (22) is rotatably connected to the inside of the movable plate (21). The inner wall of the boss (15) is provided with an inclined groove (24), and the edge of the ring member (22) is fixedly connected with a protrusion (23) embedded in the inclined groove (24), and a spring (25) is provided between the ring member (22) and the boss (15).

3. A high-yield stacking mold according to claim 2, characterized in that: A gear ring (26) is fixedly connected to one side of the annular member (22), a threaded column (28) and a transmission gear (27) meshingly connected to the gear ring (26) are rotatably connected inside the boss (15), and a transmission belt (29) is transmission-connected between the transmission gear (27) and the threaded column (28).

4. A high-yield stacking mold according to claim 1, characterized in that: The locking mechanism (40) comprises a positioning rod (41) fixed to the piston plate (34); a mounting groove (44) is symmetrically provided inside the positioning column (16); a roller (45) is movably connected inside the mounting groove (44); and a support plate (42) is slidably connected outside the positioning rod (41).

5. A high-yield stacking mold according to claim 4, characterized in that: A second spring (43) is arranged between the support plate (42) and the positioning rod (41); the top of the support plate (42) is inclined on one side close to the roller (45); and a push block for pushing the support plate (42) to return to its original position is arranged on the positioning rod (41).

6. A high-yield stacking mold according to claim 1, characterized in that: The invention also comprises a cooling mechanism (50), wherein the cooling mechanism (50) comprises a mixing disk (51) fixed inside the boss (15), a cooling cavity (54) is provided inside the positioning column (16), an outlet of the cooling cavity (54) is fixedly connected to a water outlet pipe (52), and an inlet of the cooling cavity (54) and the mixing disk (51) are fixedly connected to a water inlet pipe (53).

7. A high-yield stacking mold according to claim 6, characterized in that: One end of the push rod (33) is fixedly connected to an insertion rod (55), the interior of the mixing disk (51) is rotatably connected to a spiral groove tube (57), a protrusion (56) embedded in a groove of the spiral groove tube (57) is provided on the insertion rod (55), and an impeller (58) is fixedly connected to the outside of the spiral groove tube (57).

8. A high-yield stacking mold according to claim 1, characterized in that: A vibration filling structure (60) is provided between the sleeve (31) and the positioning column (16), and the vibration filling structure (60) comprises a limit frame (61) fixed to the inner wall of the positioning column (16), the interior of the limit frame (61) is fixedly connected with a helical tooth (62), the exterior of the sleeve (31) is fixedly connected with a mounting seat (63), a spring telescopic rod (65) is rotatably connected to the mounting seat (63), and a torsion spring (64) is provided between the mounting seat (63) and the spring telescopic rod (65).

9. A high-yield stacking mold according to claim 8, characterized in that: The telescopic end of the spring telescopic rod (65) is fixedly connected with a collision block (66), and the collision block (66) is in contact with the inclined surface of the helical tooth (62).

10. A high-yield stacking mold according to claim 2, characterized in that: Washers are provided between the tension spring (36) and the push rod (33), the spring 1 (25) and the annular member (22).

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