Injection molding mold for bottom shell of seat plate of high chair

Abstract

The invention relates to the technical field of injection molds, in particular to a high chair seat plate bottom shell injection molding mold which comprises a front mold plate, a rear mold plate, a front mold base, a front mold core, a glue inlet nozzle, a plurality of supporting leg sleeve forming mechanisms, two base plates, a rear mold base, a rear mold core, a top plate, an elastic reset assembly, a plurality of ejector pins, equal-height screws and a compression spring. The front mold core is provided with a forming groove and a plurality of supporting leg sleeve forming holes, and the rear mold core is provided with a forming convex block; the supporting leg sleeve forming mechanism comprises an inclined core-pulling plate, a moving plate and a driver, the front mold base is provided with a translation groove and an inclined sliding groove, the two ends of the inclined core-pulling plate are provided with a front core-pulling block and an inclined driving groove respectively, and the moving plate is provided with an inclined driving block; a seat plate bottom shell forming cavity is defined by the forming groove, the supporting foot sleeve forming hole, the forming protruding block and the front core pulling block. And the front core-pulling blocks can be moved into or out of the corresponding supporting leg sleeve forming holes. The base plate bottom shell with a plurality of supporting leg sleeving positions can be produced, the production efficiency is high, the quality is good, and core pulling and demolding of the front core pulling block are facilitated.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection molding mold for the seat base of a high chair. Background Technology

[0002] The applicant has applied for a multifunctional high chair with application number 202022616632.4. The seat base is a crucial component of the high chair, and its outer surface has multiple outwardly inclined leg sleeves for mounting the legs. Because the seat base has multiple outwardly inclined leg sleeves, manufacturing it is quite difficult. How to produce this seat base has become a challenge for the applicant.

[0003] Among existing patents, Chinese patent application number 202211081154.9 discloses a seat panel injection mold and demolding method, including a front mold module, a rear mold module, and a fastening assembly. The front mold module includes a front mold base, a front mold foot, and a front template connected sequentially from top to bottom; the rear mold module includes a rear template, a rear mold foot, and a rear mold base connected sequentially from top to bottom; the fastening assembly is located on the outside of the front and rear mold modules, and includes a T-shaped fastener, a fastening sleeve, and a fastener lock. One end of the T-shaped fastener is fixedly connected to the rear template, and the other end is provided with a hook-shaped part, which is fastened to the fastener lock. The fastening sleeve is slidably sleeved on the outside of the T-shaped fastener, and the fastener lock is fixedly installed on the two side walls of the front mold ejector plate by screws. Although this patent document can produce seat panels, it cannot produce the seat base shell of a high chair.

[0004] Therefore, the defects are very obvious, and a solution is urgently needed. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the purpose of this invention is to provide an injection molding mold for the seat bottom shell of a high chair.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high chair seat base injection molding mold includes a front template, a rear template corresponding to the front template, a front mold base disposed on the rear side of the front template, a front mold core embedded in the rear side of the front mold base, a sprue nozzle embedded in the middle of the front template, the front mold base, and the front mold core, multiple leg sleeve molding mechanisms disposed between the front template and the front mold base and arranged in a circular array around the central axis of the sprue nozzle, two pads mounted on the front side of the rear template, a rear mold base mounted on the two pads, and a mold core embedded in the rear mold base and aligned with the front mold core. The system includes a rear mold core, a top plate movable between the rear mold plate and the rear mold base, an elastic reset component elastically clamped between the rear mold plate and the rear mold base, and multiple ejector pins mounted on the top plate. The front mold plate and the front mold base are connected by equal-height screws, with compression springs sleeved on the equal-height screws. The two ends of the compression springs elastically abut against the front mold plate and the front mold base, respectively. The front mold core has a forming groove and multiple support sleeve forming holes inclined on the bottom wall of the forming groove. Each of the multiple support sleeve forming holes corresponds to a multiple support sleeve forming mechanism. A glue inlet is also included. The outlet of the molded part is connected to the molding groove. The rear mold core has a molding protrusion. Multiple ejector pins slide through the molding protrusion of the rear mold base and the rear mold core. The support sleeve molding mechanism includes an inclined core-pulling plate, a moving plate, and a driver. The front mold base is provided with a translation groove. The moving plate is movably disposed in the translation groove. The front mold base has an inclined sliding groove, which is connected to the corresponding support sleeve molding hole. The inclined core-pulling plate is slidably disposed in the inclined sliding groove. One end of the inclined core-pulling plate is provided with a front core-pulling block. The other end of the inclined core-pulling plate is recessed with an inclined driving groove that is set at an angle to the inclined sliding groove. One end of the movable plate is provided with an inclined drive block that slides with the inclined drive groove, and the other end of the movable plate is connected to the driver. The driver is installed on the front mold base. When the front mold core and the rear mold core are closed, the forming groove, the support sleeve forming hole, the forming protrusion and the front core-pulling block surround the forming cavity of the base plate bottom shell. The ejector pin can extend out of the forming protrusion. When the movable plate moves closer to the injection nozzle, the front core-pulling block moves into the corresponding support sleeve forming hole. When the movable plate moves away from the injection nozzle, the front core-pulling block moves out of the corresponding support sleeve forming hole.

[0008] Furthermore, the movable plate is provided with air passages or water passages, and each of the two ports of the air passage or the two ports of the water passage is equipped with a connecting nozzle. Both the front template and the front mold base are provided with clearance holes, and the connecting nozzles are located in the clearance holes. The clearance holes provide clearance space for the air pipes or water pipes connected to the connecting nozzles.

[0009] Furthermore, the front template, the front mold base, and the rear mold base are slidably connected via a guide assembly; the guide assembly includes a guide rod installed on the front template and guide sleeves installed on the front mold base and the rear mold base respectively, with the guide sleeves and guide rods slidably engaged.

[0010] Furthermore, the molding protrusion has multiple inner sleeve molding holes recessed on its surface, and multiple rear core-pulling blocks are installed on the front side of the front mold base. The multiple rear core-pulling blocks, multiple inner sleeve molding holes and multiple support sleeve molding holes are respectively set one-to-one. The bottom wall of the inner sleeve molding hole has a through hole. The rear core-pulling block passes through the through hole and extends into the inner sleeve molding hole. One rear core-pulling block and one front core-pulling block are matched and spliced.

[0011] Furthermore, one side of the rear core-pulling block is provided with a rear mating surface, and one side of the front core-pulling block is provided with a front mating surface that is concave and convex with the rear mating surface.

[0012] Furthermore, a side hole forming block and a positioning post forming block are provided on the other side of the rear core-pulling block, and a sealing block that abuts against and cooperates with the side hole forming block is provided on the hole wall of the support sleeve forming hole.

[0013] Furthermore, the inner wall of the forming groove is provided with multiple protruding pillars, and the forming surface of the forming protrusion is provided with multiple pillar holes. The multiple protruding pillars are respectively arranged in correspondence with the multiple pillar holes, and the protruding pillars can extend into the pillar holes.

[0014] Furthermore, the shaped protrusion has multiple reinforcing rib channels recessed on its surface, and the two ends of the reinforcing rib channels are respectively connected to two adjacent inner sleeve forming holes or two diagonally opposite inner sleeve forming holes.

[0015] Furthermore, the rear mold plate has a drive hole; the front mold base and the front mold core are embedded with a front cooling mechanism, and the rear mold core and the rear mold base are embedded with a rear cooling mechanism; the side wall of the front mold base is equipped with a front mold closing positioning component, and the side wall of the rear mold base is equipped with a rear mold closing positioning component, and the front mold closing positioning component and the rear mold closing positioning component are adapted to each other.

[0016] Furthermore, the elastic reset assembly includes a guide post installed between the rear mold base and the rear template and a spring elastically clamped between the rear mold base and the top plate; a limiting block is installed on the front side of the top plate, and the limiting block is used to abut against the rear side of the rear mold base.

[0017] The beneficial effects of this invention are as follows: In practical applications, when this injection molding mold is installed on an injection molding machine, the injection molding machine can drive the injection molding mold to open or close, and can also drive the top plate to move closer to or further away from the rear mold base. Initially, the front mold base and the rear mold base are in the open state. The front mold plate and the front mold base open under the elastic force of the compression spring. The driver drives the moving plate to move along the translation groove closer to the injection nozzle (the moving plate moves inward). The inclined driving block on the inward moving plate slides into the inclined driving groove on the inclined core-pulling plate, so that the inclined core-pulling plate moves inward at an angle along the inclined sliding groove until the front core-pulling block on the inclined core-pulling plate is inserted at an angle. The core is inserted into the corresponding support sleeve forming hole. Then, the injection molding machine drives the injection molding mold to close, the rear mold base closes with the front mold base and squeezes the front mold base, causing the front mold base to compress the compression spring, until the front mold base closes with the front template, and the front template presses the moving plate tightly, ensuring the positional accuracy and stability of the front core block inserted into the support sleeve forming hole. The compression spring acts as a buffer. The front mold core closes with the rear mold core, and the forming groove, support sleeve forming hole, forming protrusion, and front core block surround the base shell forming cavity of the seat plate. Then, the injection molding machine injects molten material into the base shell forming cavity of the seat plate through the injection nozzle, so that the molten material forms the high chair in the base shell forming cavity. The base plate has a support sleeve forming hole that mates with the front core-pulling block to form support sleeve positions on the base plate. After the base plate is solidified in the forming cavity, the driver drives the moving plate to move away from the injection nozzle along the translation groove (the moving plate moves outward). The inclined drive block on the outward moving plate slides with the inclined drive groove on the inclined core-pulling plate, causing the inclined core-pulling plate to move outward at an angle along the inclined groove until the front core-pulling block on the inclined core-pulling plate moves outward at an angle, thus achieving the inclined outward core-pulling demolding of the front core-pulling block. Then, the injection molding machine drives the front mold core and the rear mold core to open the mold, and the compression spring... The elastic recovery mechanism allows the front mold base and front template to open relative to each other, and the front template releases its pressure on the moving plate. The molded high chair seat base adheres to the molding protrusion of the rear mold core. Then, the injection molding machine drives the top plate to move closer to the rear mold base and compress the elastic recovery assembly. This causes the top plate to move multiple ejector pins until they push the high chair seat base off the molding protrusion, thus demolding the high chair seat base. When the injection molding machine releases the thrust on the top plate, the rebound force of the elastic recovery assembly drives the top plate and multiple ejector pins to retract back into the molding protrusion. This invention can produce high chair seat bases with multiple outwardly tilted leg sleeves, achieving high production efficiency, good quality, and facilitating core-pulling demolding of the front core block. 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 three-dimensional structure of the present invention after the template is hidden.

[0020] Figure 3 This is a schematic diagram of the exploded structure after the template is hidden in this invention.

[0021] Figure 4 This is an exploded structural diagram of the movable plate and the inclined core-pulling plate of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the front mold core of the present invention.

[0023] Figure 6 This is a three-dimensional structural schematic diagram of the front mold core of the present invention from another perspective.

[0024] Figure 7 This is a three-dimensional structural diagram of the support sleeve forming mechanism, the rear mold core, and the rear core-pulling block of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the rear mold core of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the rear template, backing plate, rear mold base, ejector pin, top plate, elastic reset assembly, guide sleeve, rear cooling mechanism, and rear core-pulling block of the present invention.

[0027] Figure 10 for Figure 9 A three-dimensional structural diagram from another perspective.

[0028] Figure 11 This is a three-dimensional structural diagram of the rear core-pulling block of the present invention.

[0029] Figure 12 This is a three-dimensional structural diagram of the seat base shell of the high chair in this embodiment.

[0030] Figure 13 This is a three-dimensional structural diagram of the seat base shell of the high chair in this embodiment from another perspective.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Front template; 2. Rear template; 3. Front mold base; 4. Front mold core; 5. Injector nozzle; 6. Support sleeve forming mechanism; 7. Pad plate; 8. Rear mold base; 9. Rear mold core; 10. Top plate; 11. Elastic reset assembly; 12. Ejector pin; 13. Equal height screw; 14. Compression spring; 15. Forming groove; 16. Support sleeve forming hole; 17. Forming protrusion; 18. Angled core-pulling plate; 19. Moving plate; 20. Driver; 21. Translation groove; 22. Angled slide groove; 23. Front core-pulling block; 24. Angled drive groove; 25. Angled drive block; 26. Guide rod; 27. Guide sleeve; 28. Inner sleeve forming hole; 29. ​​Rear core-pulling block; 30. Rear assembly 31. Front mating surface; 32. Side hole forming block; 33. Positioning post forming block; 34. Sealing block; 35. Protruding post; 36. Post hole; 37. Reinforcing rib flow channel; 38. Front cooling mechanism; 39. Rear cooling mechanism; 40. Front mold closing positioning component; 41. Rear mold closing positioning component; 42. Guide post; 43. Spring; 44. Limiting block; 45. Connecting nozzle; 46. Clearance hole; 47. Accommodating groove; 48. Pressure strip; 49. Base plate bottom shell; 50. Support foot sleeve; 51. Inner sleeve; 52. Side hole; 53. Inner positioning post; 54. Locking hole; 55. Reinforcing rib; 56. Through hole; 57. Trigger block; 58. Limit switch. Detailed Implementation

[0033] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0034] like Figures 1 to 13As shown, the present invention provides an injection molding mold for the seat shell of a high chair, comprising a front template 1, a rear template 2 corresponding to the front template 1, a front mold base 3 disposed on the rear side of the front template 1, a front mold core 4 embedded in the rear side of the front mold base 3, a glue inlet 5 embedded in the middle of the front template 1, the front mold base 3 and the front mold core 4, a plurality of support sleeve forming mechanisms 6 disposed between the front template 1 and the front mold base 3 and arranged in a circular array around the central axis of the glue inlet 5, two pads 7 mounted on the front side of the rear template 2, a rear mold base 8 mounted on the two pads 7, a rear mold core 9 embedded in the rear mold base 8 and engaging with the front mold core 4, a top plate 10 movably disposed between the rear template 2 and the rear mold base 8, and a top plate 10 elastically clamped between the rear template 2 and the rear mold base 8. The front mold core 1 and the front mold base 3 are connected by an equalizing screw 13. The equalizing screw 13 is fitted with a compression spring 14. The two ends of the compression spring 14 elastically abut against the front mold core 1 and the front mold base 3, respectively. The front mold core 4 is recessed with a forming groove 15 and a plurality of support sleeve forming holes 16 inclined from the bottom wall of the forming groove 15. The plurality of support sleeve forming holes 16 are respectively arranged in a corresponding manner with a plurality of support sleeve forming mechanisms 6. The glue outlet of the glue inlet 5 is connected to the forming groove 15. The rear mold core 9 is protruded with a forming protrusion 17. The plurality of ejector pins 12 slide through the forming protrusion 17 of the rear mold base 8 and the rear mold core 9. The support sleeve forming mechanism 6 includes an inclined core-pulling plate 18, a moving plate 19 and a driver 2. 0. The front mold base 3 is provided with a translation groove 21, and the moving plate 19 is movably disposed in the translation groove 21. Both the front mold base 3 and the front mold core 4 are provided with communicating inclined sliding grooves 22. The inclined sliding grooves 22 are connected to the corresponding support sleeve forming holes 16. The inclined core-pulling plate 18 is slidably disposed in the inclined sliding groove 22. One end of the inclined core-pulling plate 18 is provided with a front core-pulling block 23, and the other end of the inclined core-pulling plate 18 is recessed with an inclined driving groove 24 that is set at an angle to the inclined sliding groove 22. One end of the moving plate 19 is provided with an inclined driving block 25 that slides with the inclined driving groove 24. The other end of the moving plate 19 is driven and connected to the driver 20. The driver 20 is installed on the front mold base 3 and is used to drive the moving plate 19 to move closer to or away from the injection nozzle 5. The front mold core 4 and the rear mold core 9 are joined together. During molding, the molding groove 15, the support sleeve molding hole 16, the molding protrusion 17, and the front core-pulling block 23 surround the molding cavity of the base plate bottom shell 49; the ejector pin 12 can extend out of the molded surface of the molding protrusion 17; when the moving plate 19 moves closer to the injection nozzle 5, the front core-pulling block 23 moves into the corresponding support sleeve molding hole 16; when the moving plate 19 moves away from the injection nozzle 5, the front core-pulling block 23 moves out of the corresponding support sleeve molding hole 16; specifically, the stud of the equalizing screw 13 is threadedly connected to the front mold base 3, the shaft of the equalizing screw 13 is slidably connected to the front template 1, the nut of the equalizing screw 13 is used to abut against the front side of the front template 1, the front template 1 and the front mold base 3 can be closed or opened relative to each other, and the equalizing screw 13 can prevent the front template 1 from separating from the front mold base 3.

[0035] In practical applications, this injection molding mold is installed on an injection molding machine. The injection molding machine can drive the injection molding mold to open or close, and can also drive the top plate 10 to move closer to or away from the rear mold base 8. Initially, the front mold base 3 and the rear mold base 8 are in the open state. The front mold plate 1 and the front mold base 3 open under the elastic force of the compression spring 14. The driver 20 drives the moving plate 19 to move along the translation groove 21 closer to the injection nozzle 5 (the moving plate 19 moves inward). The inclined drive block 25 on the inward moving moving plate 19 slides with the inclined drive groove 24 on the inclined core-pulling plate 18, so that the inclined core-pulling plate 18 moves inward at an angle along the inclined slide groove 22 until the front core-pulling block 23 on the inclined core-pulling plate 18 is inserted into the corresponding support sleeve molding hole 16 at an angle. Inside, the injection molding machine drives the injection molding mold to close, the rear mold base 8 closes with the front mold base 3 and squeezes the front mold base 3, so that the front mold base 3 squeezes the compression spring 14 until the front mold base 3 closes with the front template 1, and the front template 1 presses the moving plate 19 to ensure the positional accuracy and stability of the front core-pulling block 23 inserted into the support sleeve forming hole 16. The compression spring 14 plays a buffering role. The front mold core 4 and the rear mold core 9 close the mold, and the forming groove 15, the support sleeve forming hole 16, the forming protrusion 17 and the front core-pulling block 23 surround the forming cavity of the seat plate bottom shell 49. Then the injection molding machine injects molten material into the forming cavity of the seat plate bottom shell 49 through the injection nozzle 5, so that the molten material forms the seat plate bottom shell 49 of the high chair in the forming cavity of the seat plate bottom shell 49. Among them, the support sleeve forms The shaped hole 16 engages with the front core-pulling block 23 to form the support sleeve 50 on the base plate bottom shell 49. After the base plate bottom shell 49 is solidified in the molding cavity, the driver 20 drives the moving plate 19 to move away from the injection nozzle 5 along the translation groove 21 (the moving plate 19 moves outward). The inclined drive block 25 on the outward moving moving plate 19 slides into the inclined drive groove 24 on the inclined core-pulling plate 18, causing the inclined core-pulling plate 18 to move outward at an angle along the inclined slide groove 22 until the front core-pulling block 23 on the inclined core-pulling plate 18 moves outward at an angle from the corresponding support sleeve molding hole 16, thus realizing the inclined outward core-pulling demolding of the front core-pulling block 23. Then, the injection molding machine drives the front mold core 4 and the rear mold core 9 to open the mold, and the compression spring 14 elastically returns to its original state. This causes the front mold base 3 and the front template 1 to open relative to each other, and the front template 1 to release the pressure on the moving plate 19. The bottom shell 49 of the high chair after molding will adhere to the molding protrusion 17 of the rear mold core 9. Then, the injection molding machine drives the top plate 10 to move closer to the rear mold base 8 and compress the elastic reset component 11, so that the top plate 10 drives multiple ejector pins 12 to move until the multiple ejector pins 12 push the bottom shell 49 of the high chair that is adhered to the molding protrusion 17 of the rear mold core 9 away from the molding protrusion 17, so as to realize the demolding of the bottom shell 49 of the high chair. When the injection molding machine releases the pushing force on the top plate 10, the rebound force of the elastic reset component 11 will drive the top plate 10 and multiple ejector pins 12 to reset, so that the multiple ejector pins 12 retract into the molding protrusion 17.The present invention can produce the seat base shell 49 of a high chair with multiple outwardly tilted support sleeves 50, with high production efficiency, good quality, and easy core pulling and demolding of the front core pulling block 23.

[0036] Specifically, the inclined drive slot 24 is a T-slot, the inclined drive block 25 is a T-block, and the driver 20 can be a cylinder.

[0037] Specifically, the number of support leg forming mechanisms 6 is two, three, or four.

[0038] In this embodiment, the movable plate 19 is provided with an air passage or a water passage. Both ports of the air passage or the two ports of the water passage are equipped with connecting nozzles 45. Both the front template 1 and the front mold base 3 are provided with clearance holes 46. The connecting nozzles 45 are located in the clearance holes 46. The clearance holes 46 provide clearance space for the air pipes or water pipes connected to the connecting nozzles 45.

[0039] In practical applications, external devices are connected to connector 45 via air pipes or water pipes. The external devices introduce cold air into the air pipes or coolant into the water pipes, so that the cold air or coolant enters from one end of the air passage or one end of the water passage and exits from the other end of the air passage or the other end of the water passage, thereby cooling the moving plate 19.

[0040] Specifically, the front side of the front template 1 is recessed with a receiving groove 47 that communicates with the clearance hole 46. The receiving groove 47 is used to accommodate air pipes or water pipes. In addition, the front template 1 is equipped with multiple pressure strips 48, which span across the receiving groove 47 and press the air pipes or water pipes tightly within the receiving groove 47. By accommodating the air pipes or water pipes through the receiving groove 47, the air pipes or water pipes are managed, and the pressure strips 48 limit the air pipes or water pipes within the receiving groove 47, ensuring the positional accuracy and stability of the air pipes or water pipes and preventing them from swinging or moving out of the receiving groove 47 at will.

[0041] In this embodiment, the front mold plate 1, the front mold base 3, and the rear mold base 8 are slidably connected via a guide assembly. The guide assembly includes a guide rod 26 mounted on the front mold plate 1 and guide sleeves 27 mounted on the front mold base 3 and the rear mold base 8, respectively. The guide sleeves 27 are slidably engaged with the guide rod 26. During mold opening and closing, the slidable engagement between the guide rod 26 and the guide sleeves 27 ensures good movement stability of the rear mold base 8, and also ensures good stability when the front mold base 3 and the front mold plate 1 are opened or closed.

[0042] In this embodiment, the molding protrusion 17 has a plurality of inner sleeve molding holes 28 recessed on its surface, and the front side of the front mold base 3 is equipped with a plurality of rear core-pulling blocks 29. The plurality of rear core-pulling blocks 29, the plurality of inner sleeve molding holes 28 and the plurality of support sleeve molding holes 16 are respectively arranged in a one-to-one correspondence. The bottom wall of the inner sleeve molding hole 28 has a through hole 56. The rear core-pulling block 29 passes through the through hole 56 and extends into the inner sleeve molding hole 28. One rear core-pulling block 29 is engaged and spliced ​​with one front core-pulling block 23. Specifically, one side of the rear core-pulling block 29 is provided with a rear splicing surface 30, and one side of the front core-pulling block 23 is provided with a front splicing surface 31 that is concave and convex with the rear splicing surface 30.

[0043] In practical applications, after the injection molding mold is closed, the rear mating surface 30 of a rear core-pulling block 29 abuts against the front mating surface 31 of a front core-pulling block 23, allowing the molten material to enter the inner sleeve forming hole 28 and surround the front core-pulling block 23 and the rear core-pulling block 29, so that the inner sleeve 51 can be formed on the inner wall of the base plate bottom shell 49.

[0044] In this embodiment, a side hole forming block 32 and a positioning post forming block 33 are provided on the other side of the rear core-pulling block 29, and a sealing block 34 protrudes from the hole wall of the support sleeve forming hole 16 to abut against the side hole forming block 32. This structural design enables the molding of the seat base shell 49 of the high chair with side holes 52 and inner positioning posts 53 on the support sleeve position 50, and the side hole forming block 32 does not affect the demolding of the seat base shell 49.

[0045] In this embodiment, the inner wall of the molding groove 15 is provided with a plurality of protruding posts 35, and the molding surface of the molding protrusion 17 is provided with a plurality of post holes 36. The plurality of protruding posts 35 are respectively provided in a one-to-one correspondence with the plurality of post holes 36, and the protruding posts 35 can extend into the post holes 36. This structural design enables the base shell 49 of the seat plate to have a plurality of locking holes 54 recessed from the outside to the inside.

[0046] In this embodiment, the shaped protrusion 17 has a plurality of reinforcing rib channels 37 recessed into its surface. The ejector pin 12 can extend into the reinforcing rib channels 37. The two ends of a portion of the reinforcing rib channels 37 are respectively connected to two adjacent inner sleeve forming holes 28, the two ends of a portion of the reinforcing rib channels 37 are respectively connected to two diagonally opposite inner sleeve forming holes 28, and one end of a portion of the reinforcing rib channels 37 is connected to an inner sleeve forming hole 28. This structural design results in the inner wall of the base plate bottom shell 49 having a plurality of reinforcing ribs 55 formed.

[0047] In this embodiment, the rear template 2 is provided with a drive hole; the drive hole is used for the drive unit of the injection molding machine to push the top plate 10.

[0048] In this embodiment, the front mold base 3 and the front mold core 4 are embedded with a front cooling mechanism 38, and the rear mold core 9 and the rear mold base 8 are embedded with a rear cooling mechanism 39. After the molding cavity of the base plate bottom shell 49 is filled with molten material, the front cooling mechanism 38 and the rear cooling mechanism 39 are activated to cool and solidify the molten material in the molding cavity of the base plate bottom shell 49, so as to accelerate the efficiency of molten material solidification and shaping.

[0049] In this embodiment, the side wall of the front mold base 3 is equipped with a front mold closing positioning component 40, and the side wall of the rear mold base 8 is equipped with a rear mold closing positioning component 41. The front mold closing positioning component 40 and the rear mold closing positioning component 41 are fitted together. When the injection molding mold is closed, the front mold closing positioning component 40 and the rear mold closing positioning component 41 cooperate to ensure the mold closing accuracy and stability.

[0050] In this embodiment, the elastic reset assembly 11 includes a guide post 42 installed between the rear mold base 8 and the rear mold plate 2, and a spring 43 elastically clamped between the rear mold base 8 and the top plate 10. When the injection molding machine drives the top plate 10 to move, the ejector pin 12 demolds the molded base plate bottom shell 49, the spring 43 is compressed, and the guide post 42 guides the movement of the top plate 10, improving the stability of the movement of the top plate 10. When the injection molding machine releases the thrust on the top plate 10, the rebound force of the spring 43 drives the top plate 10 and the ejector pin 12 to automatically reset.

[0051] In this embodiment, a limiting block 44 is installed on the front side of the top plate 10. The limiting block 44 is used to abut against the rear side of the rear mold base 8. During the process of the ejector pin 12 demolding the base plate bottom shell 49 that is attached to the molding protrusion 17, when the limiting block 44 abuts against the rear side of the rear mold base 8, it proves that the ejector pin 12 has demolded the molded base plate bottom shell 49. The limiting block 44 limits the top plate 10 to ensure the positional accuracy and stability of the top plate 10.

[0052] Specifically, the limiting block 44 is a buffer block, preferably a rubber block. This structural design gives the limiting block 44 a certain degree of elasticity, which serves to buffer and reduce noise.

[0053] Specifically, the movable plate 19 is equipped with a trigger block 57, and the front mold base 3 is equipped with a limit switch 58. The trigger block 57 is used to trigger the limit switch 58, and the limit switch 58 is electrically connected to the driver 20. In practical applications, when the movable plate 19 moves inward, when the trigger block 57 abuts against the spring of the limit switch 58 to trigger the limit switch 58, it proves that the movable plate 19 has moved into position. At this time, the limit switch 58 sends a signal to the driver 20, so that the driver 20 stops driving the movable plate 19 to move inward, so as to ensure the accuracy of the moving position of the movable plate 19 and avoid the movable plate 19 moving too inward, which would cause the front core-pulling block 23 and the rear core-pulling block 29 to have a hard impact collision.

[0054] All technical features in this embodiment can be freely combined according to actual needs.

[0055] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A mold for injection molding the seat base shell of a high chair, characterized in that: Includes a front template (1), a rear template (2) corresponding to the front template (1), a front mold base (3) located on the rear side of the front template (1), a front mold core (4) embedded on the rear side of the front mold base (3), a glue inlet (5) embedded in the middle of the front template (1), the front mold base (3) and the front mold core (4), multiple support sleeve forming mechanisms (6) arranged in a ring array between the front template (1) and the front mold base (3) and arranged around the central axis of the glue inlet (5), two pads (7) installed on the front side of the rear template (2), a rear mold base (8) installed on the two pads (7), a rear mold core (9) embedded in the rear mold base (8) and mating with the front mold core (4), and a top plate (1) movable between the rear template (2) and the rear mold base (8). 0) An elastic reset component (11) is elastically clamped between the rear template (2) and the rear mold base (8), and multiple ejector pins (12) are installed on the top plate (10). The front template (1) and the front mold base (3) are connected by equal-height screws (13). The equal-height screws (13) are fitted with compression springs (14). The two ends of the compression springs (14) elastically abut against the front template (1) and the front mold base (3) respectively. The front mold core (4) is recessed with a forming groove (15) and multiple support sleeve forming holes (16) inclined from the bottom wall of the forming groove (15). The multiple support sleeve forming holes (16) are respectively set in correspondence with multiple support sleeve forming mechanisms (6). The glue outlet of the glue inlet (5) is connected to the forming groove (15). The rear mold core (9) is protruded with forming protrusions ( 17), multiple ejector pins (12) slide through the forming protrusions (17) of the rear mold base (8) and the rear mold core (9); the support sleeve forming mechanism (6) includes an inclined core-pulling plate (18), a moving plate (19) and a driver (20), the front mold base (3) is provided with a translation groove (21), the moving plate (19) is movably disposed in the translation groove (21), the front mold base (3) is provided with an inclined sliding groove (22), the inclined sliding groove (22) is connected to the corresponding support sleeve forming hole (16), the inclined core-pulling plate (18) is slidably disposed in the inclined sliding groove (22), one end of the inclined core-pulling plate (18) is provided with a front core-pulling block (23), the other end of the inclined core-pulling plate (18) is recessed with an inclined driving groove (24) set at an angle with the inclined sliding groove (22), one end of the moving plate (19) is provided with An inclined drive block (25) is provided, which slides in conjunction with the inclined drive groove (24). The other end of the moving plate (19) is connected to the driver (20), which is mounted on the front mold base (3). When the front mold core (4) and the rear mold core (9) are closed, the forming groove (15), the support sleeve forming hole (16), the forming protrusion (17) and the front core-pulling block (23) surround the forming cavity of the base plate bottom shell (49). The ejector pin (12) can extend out of the profile of the forming protrusion (17). When the moving plate (19) moves close to the injection nozzle (5), the front core-pulling block (23) moves into the corresponding support sleeve forming hole (16). When the moving plate (19) moves away from the injection nozzle (5), the front core-pulling block (23) moves out of the corresponding support sleeve forming hole (16).

2. The injection molding mold for the seat base shell of a high chair according to claim 1, characterized in that: The movable plate (19) is provided with an air passage or a water passage. Both ports of the air passage or the two ports of the water passage are equipped with connecting nozzles (45). Both the front template (1) and the front mold base (3) are provided with clearance holes (46). The connecting nozzles (45) are located in the clearance holes (46). The clearance holes (46) provide clearance space for the air pipes or water pipes connected to the connecting nozzles (45).

3. The injection molding mold for the seat base shell of a high chair according to claim 1, characterized in that: The front template (1), the front mold base (3) and the rear mold base (8) are slidably connected by a guide assembly; the guide assembly includes a guide rod (26) installed on the front template (1) and guide sleeves (27) installed on the front mold base (3) and the rear mold base (8) respectively, and the guide sleeves (27) and the guide rods (26) are slidably engaged.

4. The injection molding mold for the seat base shell of a high chair according to claim 1, characterized in that: The molding protrusion (17) has a plurality of inner sleeve molding holes (28) recessed on its surface. The front side of the front mold base (3) is equipped with a plurality of rear core-pulling blocks (29). The plurality of rear core-pulling blocks (29), the plurality of inner sleeve molding holes (28) and the plurality of support sleeve molding holes (16) are respectively set one by one. The bottom wall of the inner sleeve molding hole (28) has a through hole (56). The rear core-pulling block (29) passes through the through hole (56) and extends into the inner sleeve molding hole (28). One rear core-pulling block (29) and one front core-pulling block (23) are matched and spliced.

5. The injection molding mold for the seat base shell of a high chair according to claim 4, characterized in that: The rear core-pulling block (29) has a rear mating surface (30) on one side, and the front core-pulling block (23) has a front mating surface (31) on one side that is concave and convex with the rear mating surface (30).

6. The injection molding mold for the seat base shell of a high chair according to claim 5, characterized in that: The other side of the rear core-pulling block (29) is provided with a side hole forming block (32) and a positioning post forming block (33), and the hole wall of the support sleeve forming hole (16) is provided with a sealing block (34) that abuts against the side hole forming block (32).

7. The injection molding mold for the seat base shell of a high chair according to claim 1, characterized in that: The inner wall of the forming groove (15) is provided with a plurality of protruding pillars (35), and the forming surface of the forming protrusion (17) is provided with a plurality of pillar holes (36). The plurality of protruding pillars (35) are respectively arranged in correspondence with the plurality of pillar holes (36), and the protruding pillars (35) can extend into the pillar holes (36).

8. The injection molding mold for the seat base shell of a high chair according to claim 4, characterized in that: The shaped protrusion (17) has a plurality of reinforcing rib channels (37) recessed on its surface. The two ends of the reinforcing rib channels (37) are respectively connected to two adjacent inner sleeve forming holes (28) or two diagonally opposite inner sleeve forming holes (28).

9. The injection molding mold for the seat base shell of a high chair according to claim 1, characterized in that: The rear mold plate (2) has a drive hole; the front mold base (3) and the front mold core (4) are fitted with a front cooling mechanism (38), and the rear mold core (9) and the rear mold base (8) are fitted with a rear cooling mechanism (39); the side wall of the front mold base (3) is fitted with a front mold closing positioning part (40), and the side wall of the rear mold base (8) is fitted with a rear mold closing positioning part (41). The front mold closing positioning part (40) and the rear mold closing positioning part (41) are fitted together.

10. The injection molding mold for the seat base shell of a high chair according to claim 1, characterized in that: The elastic reset assembly (11) includes a guide post (42) installed between the rear mold base (8) and the rear template (2) and a spring (43) elastically clamped between the rear mold base (8) and the top plate (10); a limiting block (44) is installed on the front side of the top plate (10), and the limiting block (44) is used to abut against the rear side of the rear mold base (8).

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