Hot runner shoe sole forming device and forming method

Abstract

The invention provides a hot runner shoe sole forming device and method, and relates to the technical field of thermoplastic, the hot runner shoe sole forming device comprises a base, an upper mold, a lower mold, a heating assembly and an injection molding pipe; four limiting rods are fixedly arranged on the upper surface of the base, a top plate is fixedly arranged on the outer walls of the four limiting rods, an oil cylinder is installed on the top of the top plate, a connecting rod is installed at the output end of the oil cylinder, and the bottom of the connecting rod is fixedly installed on an upper mold. When injection molding is finished, viscous master batches existing at the bottom end opening of the injection molding pipe and a forming piece in the lower mold can form a viscous triangular small water gap, so that after injection molding is finished, the movable plate can automatically reset to a closed state along with the departure of the injection molding pipe, and in the closing process, the side face of the movable plate can move to eliminate the viscous triangular water gap; in this way, it can be guaranteed that the surface of a formed part is smoother, workers do not need to eliminate small water gaps for the second time, and the situation that sharp water gaps injure the workers is avoided.

Description

Technical Field

[0001] The invention relates to the field of thermoplastic technology, and in particular to a hot runner sole molding device and a molding method. Background Art

[0002] Hot runner sole molding mold is a mold used for injection molding. Compared with traditional cold runner molds, hot runner molds have higher production efficiency and product quality. It sets heating elements and temperature control systems in the mold to heat the plastic material to a certain temperature, and then directly enters the mold cavity through the hot runner, so that the plastic material fills the mold cavity more evenly, thereby avoiding defects such as shrinkage holes and bubbles that may occur during cooling, and improving the appearance and mechanical properties of the product.

[0003] Hot runner sole molding molds can achieve more precise control of plastic material injection, avoiding bad materials such as slugs and extrusion ports that may be produced in the cold runner, thereby reducing the waste of plastic materials. Hot runner sole molding molds can achieve injection molding of complex shapes and details, which helps to design more creative and unique shoes. Hot runner sole molding molds can also achieve multi-cavity injection molding to improve production capacity.

[0004] However, in actual working conditions, when the injection molded part is separated from the upper mold after molding is completed, the bottom end of the injection port will form a small triangular adhesion outlet with the upper surface of the successfully molded sole finished product. The outlet is relatively sharp and needs to be manually removed for a second time, which is not only time-consuming and labor-intensive, but the sharp triangular outlet is also likely to affect the operation of the staff.

[0005] Therefore, it is necessary to provide a hot runner sole molding device and molding method to solve the above technical problems. Summary of the invention

[0006] The present invention provides a hot runner sole molding device and molding method, which solves the problem in the related art that when the injection port and the finished sole part are separated, a sticky triangular small water outlet is generated, and manual removal is time-consuming and labor-intensive and easily injures the staff.

[0007] In order to solve the above technical problems, the present invention provides a hot runner sole molding device, comprising a base, an upper mold, a lower mold, a heating component and an injection molding tube;

[0008] Four limiting rods are fixedly arranged on the upper surface of the base, and a top plate is fixedly arranged on the outer walls of the four limiting rods. A cylinder is installed on the top of the top plate, and a connecting rod is installed on the output end of the cylinder. The bottom of the connecting rod is fixedly installed with the upper mold;

[0009] A middle tube is installed inside the upper mold, the heating assembly includes a power supply installed on the outer wall of the upper mold, heating plates are attached to the outer walls of both sides of the middle tube, and a medium tube is fixed on the inner wall of the middle tube;

[0010] A removal mechanism is installed inside the upper mold and below the middle tube, and the removal mechanism includes a sleeve fixed on the inner wall of the upper mold, a fixed tube is fixed on the inner wall of the sleeve, a return spring is placed inside the fixed tube, a lifting tube is fixed on the top of the return spring, a longitudinal rack is fixed on the outer wall of the lifting tube, a notch is opened on the outer wall of the sleeve, and the outer wall of the fixing tube is rotatably connected with the first gear and the third gear respectively, the second gear is connected with the keyway at the axis of the first gear, and the bottom of the third gear is meshedly connected with a transverse rack, a limiting plate is fixed on the bottom of the transverse rack, a movable plate is fixed on the bottom of the limiting plate, and an avoidance groove is opened at the bottom of the fixing tube.

[0011] Preferably, the power supply is electrically connected to the two heating plates, the medium tube is in a spiral structure, and the limit plate is slidably connected to the inner wall of the fixed tube.

[0012] Preferably, the lifting tube and the fixed tube are slidably connected, the longitudinal rack and the first gear are meshed with each other, and the second gear and the third gear are meshed with each other.

[0013] Preferably, it also includes a blanking mechanism, the top of the lower mold is provided with a molding groove, the blanking mechanism includes a mounting plate fixed to the inner wall of the lower mold, the bottom of the mounting plate is installed with an electric cylinder, two jacking pipes are installed at the output end of the electric cylinder, the top of the two jacking pipes are fixed with a top block, the outer walls of the two jacking pipes are provided with a through hole, the outer walls of the two jacking pipes and located at the inner top of the lower mold are fixed with a sleeve, and the outer walls of the two sleeves are installed with an external hose.

[0014] Preferably, the two top blocks are embedded in the inner bottom of the forming groove, and the two through holes are adapted to the inlets of the two external hoses.

[0015] Preferably, it also includes a spraying mechanism, a fixing plate is fixedly provided at the bottom of the top plate, the spraying mechanism includes a positioning plate embedded in the top of the upper mold, a medium box is installed on the upper surface of the upper mold and on one side of the positioning plate, the first slide bar and the second slide bar are slidably connected inside the positioning plate, a avoidance hole is opened on the back of the fixing plate and directly above the second slide bar, a receiving plate is fixedly provided on the outer wall of the first slide bar, a first spring is fixedly provided on the upper surface of the receiving plate and on the outer wall of the first slide bar, a flip rack is fixedly provided at the bottom end of the second slide bar, a second spring is sleeved on the outer wall of the second slide bar, a trigger plate is fixedly provided on the inner wall of the upper mold, the outer wall of the bottom end of the first slide bar is rotatably connected to a flip gear, and a spray head is installed at the axis of the flip gear.

[0016] Preferably, the second slide bar and the receiving plate are slidably connected, the top of the first spring is fixedly connected to the bottom surface of the positioning plate, and the upper and lower ends of the second spring are fixedly connected to the bottom of the receiving plate and the upper surface of the flip rack.

[0017] Preferably, the flip rack and the flip gear are meshed with each other, and the medium box is installed through a delivery hose and a nozzle seal.

[0018] A molding method of a hot runner sole molding device, characterized in that it comprises the following steps:

[0019] Step S1: preheating, start the power supply to continuously energize and heat the heating plate through the wire, the heating plates on both sides can quickly heat the outer wall of the central tube, and the inside of the medium tube will continue to heat up (the medium tube can be filled with liquid medium with good thermal conductivity during production).

[0020] Step S2: Before injection molding, the injection tube descends into the middle tube, and the user activates the oil cylinder to control the connecting rod so that the upper mold descends and the lower mold closes.

[0021] Step S3: The injection tube must continue to descend during injection molding, so that the tapered lifting tube will fit closely with the bottom of the injection tube. As it continues to descend, the lifting tube will slide inside the fixed tube to compress the reset spring. At this time, the longitudinal rack will follow the lifting tube to descend and control the first gear to rotate clockwise. The first gear synchronously drives the second gear to rotate, and the second gear engages to control the third gear to rotate counterclockwise. The counterclockwise rotating third gear will engage to control the transverse rack to pull the movable plate to move, thereby opening the fixed tube. In this way, the liquid masterbatch will enter the lifting tube from the injection tube and then enter the lower mold to complete the feeding and molding.

[0022] Step S4: Cooling and discharging. After the automatic cooling is completed, the electric cylinder is started to control the top pipe to drive the top block to rise to eject the finished sole part inside the molding groove, and when the through hole on the outer wall of the top pipe moves to the inside of the sleeve, the through hole will coincide with the port of the external hose (the external hose can be connected to an external air pump). At this time, the external hose can be quickly inflated from the top pipe into the top block, and then the rising pressure will eject the finished sole part and separate it from the lower mold, thus realizing automatic unloading.

[0023] Compared with the related art, the hot runner sole forming device and forming method provided by the present invention have the following beneficial effects:

[0024] During injection molding, the movable plate can be controlled to open during the injection molding process by relying on the fit and continuous descent of the injection molding tube and the lifting tube. This ensures that the liquid masterbatch can smoothly enter the lower mold from the upper mold to achieve injection molding. If the injection molding is completed, when the injection molding tube separates from the upper mold from the rise, the sticky masterbatch at the bottom end of the injection molding tube will form a sticky triangular small water outlet with the molded part in the lower mold. Therefore, after the injection molding is completed, the movable plate will automatically reset to a closed state as the injection molding tube moves away. During the closing process, the side of the movable plate will move to eliminate the sticky triangular water outlet, which can ensure that the surface of the molded part is smoother. Therefore, the staff does not need to eliminate the small water outlet for a second time, and avoids injuries to the staff caused by sharp water outlets. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0027] Figure 2 for Figure 1 The schematic diagram of the cross-sectional structure of the upper mold shown;

[0028] Figure 3 for Figure 2 The schematic diagram of the heating assembly structure shown;

[0029] Figure 4 for Figure 2 The schematic diagram of the removal mechanism structure shown;

[0030] Figure 5 for Figure 4 Detailed connection structure diagram of the limit plate and the fixed pipe shown;

[0031] Figure 6 for Figure 4 The schematic diagram of the working state of controlling the movable plate to open when the injection tube descends and drives the lifting tube to descend is shown;

[0032] Figure 7 for Figure 1 The schematic diagram of the connection working state of the lower die and the material discharge mechanism shown;

[0033] Figure 8 for Figure 7 Detailed structural diagram of the feeding mechanism shown;

[0034] Fig. 9 for Figure 1 The schematic diagram of the spraying mechanism structure shown;

[0035] Fig.10 for Figure 1 and Fig. 9 The schematic diagram of the upper die being reset to the initial working state after forming is shown;

[0036] Fig.11 for Fig.10 The upper mold shown in the figure continuously rises to eject the nozzle in the working state;

[0037] Fig.12 for Fig.11 The upper die shown continues to rise to control the flip rack to engage and pull the nozzle to flip the working state schematic diagram.

[0038] Description of Figure Numbers:

[0039] 1. Base, 2. Upper mold, 3. Lower mold;

[0040] 4. Middle pipe;

[0041] 5. Heating assembly, 51. Power supply, 52. Heating plate, 53. Medium pipe;

[0042] 6. Removal mechanism, 61. Sleeve, 62. Fixed tube, 63. Return spring, 64. Lifting tube, 65. Longitudinal rack, 66. Notch, 67. First gear, 68. Second gear, 69. Third gear, 610. Transverse rack, 611. Limiting plate, 612. Moving plate, 613. Avoidance groove.

[0043] 7. unloading mechanism, 71. mounting plate, 72. electric cylinder, 73. jacking pipe, 74. through hole, 75. jacking block, 76. sleeve, 77. external hose.

[0044] 8. Spraying mechanism, 81. Positioning plate, 82. Medium box, 83. First slide bar, 84. Second slide bar, 85. Receiving plate, 86. First spring, 87. Flipping rack, 88. Second spring, 89. Trigger plate, 810. Flipping gear, 811. Spray head;

[0045] 9. Injection molding tube, 10. Limit rod, 11. Top plate, 12. Oil cylinder, 13. Connecting rod, 14. Fixing plate, 15. Molding groove, 16. Avoidance hole.

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] 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.

[0048] The invention provides a hot runner sole molding device and a molding method.

[0049] First embodiment:

[0050] Please combine Figures 1 to 6 , a hot runner sole molding device, comprising a base 1, an upper mold 2, a lower mold 3, a heating component 5 and an injection tube 9;

[0051] Four limiting rods 10 are fixedly arranged on the upper surface of the base 1, and a top plate 11 is fixedly arranged on the outer wall of the four limiting rods 10. A cylinder 12 is installed on the top of the top plate 11, and a connecting rod 13 is installed on the output end of the cylinder 12. The bottom of the connecting rod 13 is fixedly installed with the upper mold 2;

[0052] A middle tube 4 is installed inside the upper mold 2, and the heating assembly 5 includes a power supply 51 installed on the outer wall of the upper mold 2. Heating plates 52 are attached to the outer walls of both sides of the middle tube 4, and a medium tube 53 is fixed on the inner wall of the middle tube 4.

[0053] See also Figure 2 and Figure 3 : The entire middle tube 4 runs through the entire upper mold 2 from top to bottom. The power supply 51 is started to continuously energize and heat the heating plate 52 through the wire. The heating plates 52 on both sides can quickly heat the outer wall of the middle tube 4. At this time, the inside of the medium tube 53 will continue to heat up (the medium tube 53 can store liquid medium with good thermal conductivity during production). When the temperature reaches a suitable level, the injection tube 9 descends into the middle tube 4 to perform injection molding on the lower mold 3.

[0054] A removal mechanism 6 is installed inside the upper mold 2 and below the middle tube 4. The removal mechanism 6 includes a sleeve 61 fixed on the inner wall of the upper mold 2, a fixed tube 62 is fixed on the inner wall of the sleeve 61, a return spring 63 is placed inside the fixed tube 62, a lifting tube 64 is fixed on the top of the return spring 63, a longitudinal rack 65 is fixed on the outer wall of the lifting tube 64, a notch 66 is provided on the outer wall of the sleeve 61, a first gear 67 and a third gear 69 are rotatably connected to the outer wall of the fixed tube 62, a second gear 68 is connected to the keyway at the axis of the first gear 67, a transverse rack 610 is meshedly connected to the bottom of the third gear 69, a limiting plate 611 is fixed to the bottom of the transverse rack 610, a movable plate 612 is fixed to the bottom of the limiting plate 611, and an avoidance groove 613 is provided at the bottom of the fixed tube 62.

[0055] See also Figure 4 : When the injection tube 9 descends to a certain position, it will fit with the inside of the lifting tube 64. At this time, the liquid masterbatch has not yet flowed into the injection tube 9, so the return spring 63 is in an extended state, and the movable plate 612 still blocks the bottom end of the fixed tube 62.

[0056] See also Figure 6 : When the injection tube 9 is undergoing injection molding, it must continue to descend, so that the tapered lifting tube 64 will fit closely with the bottom of the injection tube 9. As it continues to descend, the lifting tube 64 will slide inside the fixed tube 62, thereby compressing the reset spring 63. At this time, the longitudinal rack 65 will follow the lifting tube 64 to descend and control the first gear 67 to rotate clockwise. The first gear 67 synchronously drives the second gear 68 to rotate. The second gear 68 engages to control the third gear 69 to rotate counterclockwise. The counterclockwise rotating third gear 69 will engage to control the transverse rack 610 to pull the movable plate 612 to move, thereby opening the fixed tube 62. In this way, the liquid masterbatch will enter the lifting tube 64 from the injection tube 9 and then enter the lower mold 3 to complete the feeding and molding.

[0057] The power supply 51 is electrically connected to the two heating plates 52 , the medium tube 53 is in a spiral structure, and the limiting plate 611 is slidably connected to the inner wall of the fixed tube 62 .

[0058] The lifting tube 64 and the fixed tube 62 are slidably connected, the longitudinal rack 65 and the first gear 67 are meshed with each other, and the second gear 68 and the third gear 69 are meshed with each other.

[0059] See also Figure 5 : It can be understood that the limit plate 611 is in the shape of an "I" character, so that when the transverse rack 610 drives the movable plate 612 to slide at the bottom end of the fixed tube 62, the stability and smoothness of the movable plate 612 during movement can be guaranteed.

[0060] In this embodiment, a spiral medium tube 53 is installed inside the middle tube 4, and the spiral inner wall is fitted with the outer wall of the lowered injection tube 9. Compared with the traditional direct heating plate 52 or heating tube design, this design uses a heat conduction medium for heating and constant temperature, which can ensure that the heating temperature in the upper mold 2 is more uniform and constant, and can avoid the agglomeration or uneven feeding of liquid masterbatch during the injection molding process;

[0061] During injection molding, the movable plate 612 can be controlled to open during the injection molding process by relying on the close fit and continuous descent of the injection molding tube 9 and the lifting tube 64, so as to ensure that the liquid masterbatch can smoothly enter the lower mold 3 from the upper mold 2 to realize injection molding. If after the injection molding is completed, when the injection molding tube 9 separates the upper mold 2 from the rise, the sticky masterbatch at the bottom end of the injection molding tube 9 will form a sticky triangular small water outlet with the molded part in the lower mold 3. Therefore, after the injection molding is completed, the movable plate 612 will automatically reset to a closed state as the injection molding tube 9 moves away. During the closing process, the side of the movable plate 612 will move to eliminate the sticky triangular water outlet, so as to ensure that the surface of the molded part is smoother. Therefore, the staff does not need to eliminate the small water outlet for a second time, and the sharp water outlet can avoid causing harm to the staff.

[0062] Second embodiment:

[0063] See also Figure 7 and Figure 8 , also includes a blanking mechanism 7, a molding groove 15 is provided on the top of the lower mold 3, the blanking mechanism 7 includes a mounting plate 71 fixed to the inner wall of the lower mold 3, an electric cylinder 72 is installed at the bottom of the mounting plate 71, and two top pipes 73 are installed at the output end of the electric cylinder 72, the tops of the two top pipes 73 are fixed with top blocks 75, the outer walls of the two top pipes 73 are opened with through holes 74, the outer walls of the two top pipes 73 and the inner top of the lower mold 3 are fixed with sleeves 76, and the outer walls of the two sleeves 76 are installed with external hoses 77.

[0064] See also Figure 7 : After the injection molding is completed, the sole will form a finished product of the sole in the molding groove 15 inside the lower mold 3.

[0065] See also Figure 8: When the finished product is cooled, the user needs to start the electric cylinder 72 to control the top tube 73 to drive the top block 75 to rise and eject the finished sole part inside the molding groove 15, and when the through hole 74 on the outer wall of the top tube 73 moves to the inside of the sleeve 76, the through hole 74 will coincide with the port of the external hose 77 (the external hose 77 can be connected to an external air pump). At this time, the external hose 77 can be quickly inflated from the top tube 73 into the top block 75, and then the rising pressure will eject the finished sole part and separate it from the lower mold 3, thus realizing automatic unloading.

[0066] The two top blocks 75 are embedded in the inner bottom of the molding groove 15, and the two through holes 74 are adapted to the inlets of the two external hoses 77.

[0067] This embodiment: Compared with the traditional discharge design, this case adopts the method of first driving the ejection to separate the finished sole part and the lower mold 3. When the ejection is successful, the through hole 74 will be connected to the external hose 77, so that an upward lift can be generated, so that the finished sole part on the top block 75 and the lower mold 3 can be separated. Therefore, this design can realize the automation and integration of ejection and unloading, thereby avoiding repeated manual material handling and ensuring the safety of the staff when taking the material.

[0068] Third embodiment:

[0069] See also Figure 1 , Figures 9 to 12 , also includes a spraying mechanism 8, a fixed plate 14 is fixedly provided at the bottom of the top plate 11, the spraying mechanism 8 includes a positioning plate 81 embedded in the top of the upper mold 2, a medium box 82 is installed on the upper surface of the upper mold 2 and on one side of the positioning plate 81, the interior of the positioning plate 81 is slidably connected with a first slide bar 83 and a second slide bar 84, a avoidance hole 16 is opened on the back of the fixed plate 14 and directly above the second slide bar 84, the outer wall of the first slide bar 83 is fixedly provided with a receiving plate 85, the upper surface of the receiving plate 85 and the outer wall of the first slide bar 83 are fixedly provided with a first spring 86, the bottom end of the second slide bar 84 is fixedly provided with a flip rack 87, the outer wall of the second slide bar 84 is sleeved with a second spring 88, the inner wall of the upper mold 2 is fixedly provided with a trigger plate 89, the outer wall of the bottom end of the first slide bar 83 is rotatably connected with a flip gear 810, and a spray head 811 is installed at the axis of the flip gear 810.

[0070] See also Fig. 9 and Fig.10 : When switching from the second embodiment to the first embodiment, the upper mold 2 needs to be reset to the initial working state. Therefore, in this state, the initial position of the nozzle 811 is located inside the upper mold 2, and the top end of the first sliding rod 83 is in contact with the lower surface of the fixed plate 14.

[0071] See also Fig.11 :The user starts the oil cylinder 12 to continue to control the upper mold 2 to rise. At this time, the rising upper mold 2 will drive the first slide bar 83 to bear the force on the fixed plate 14, and the first spring 86 extends to control the entire receiving plate 85 and the nozzle 811 and the flip rack 87 to descend as a whole and protrude out of the upper mold 2.

[0072] See also Fig.12 : As the upper mold 2 continues to rise, the trigger plate 89 inside the upper mold 2 will eventually contact the outer wall of the flip rack 87. Therefore, the rising trigger plate 89 will rise and drive the flip rack 87 to rise to control the compression of the second spring 88. Therefore, the flip rack 87 during the rising process will engage and drive the flip gear 810 to rotate counterclockwise. Therefore, the counterclockwise rotating flip gear 810 will synchronously drive the nozzle 811 to rotate in a counterclockwise arc. During the arc rotation, the nozzle 811 can spray the release agent inside the medium box 82 onto the lower mold 3 after the discharge is completed.

[0073] The second slide bar 84 and the receiving plate 85 are slidably connected, the top of the first spring 86 is fixedly connected to the bottom surface of the positioning plate 81, and the upper and lower ends of the second spring 88 are fixedly connected to the bottom of the receiving plate 85 and the upper surface of the flip rack 87.

[0074] The flip rack 87 and the flip gear 810 are meshed with each other, and the medium box 82 is sealed and installed through a delivery hose and a nozzle 811.

[0075] See also Fig. 9 : It can be understood that the same avoidance hole 16 as the second slide bar 84 is provided above the second slide bar 84, so that when the second slide bar 84 is in the second rising process, it will enter the inside of the avoidance hole 16, thereby avoiding the interference caused by the second slide bar 84;

[0076] At the same time, the first slide bar 83 will also synchronously drive all the components at the bottom of the receiving plate 85 to descend during the downward movement.

[0077] In this embodiment: when switching from the blanking state to the injection state, the user can continuously control the rising process of the upper mold 2. During the first rising step, the nozzle 811 in the hidden state can be protruded from the upper mold 2. With the continuous secondary rising, the trigger plate 89 inside the upper mold 2 will control the flip rack 87 to rise and drive the flip gear 810 to control the nozzle 811 to rotate in an arc shape, so that the surface of the lower mold 3 can be sprayed with a circular arc trajectory. Therefore, this design can not only realize the automatic spraying of the demolding agent on the lower mold 3 during the switching between the two states, but also the arc-shaped spraying trajectory can ensure that the release agent is sprayed on the lower mold 3 more evenly.

[0078] Please refer to Figures 1 to 12The working principle of a hot runner sole molding device provided by the present invention is as follows:

[0079] Step S1: The entire middle tube 4 passes through the entire upper mold 2 from top to bottom. The power supply 51 is started to continuously energize and heat the heating plate 52 through the wire. The heating plates 52 on both sides can quickly heat the outer wall of the middle tube 4. At this time, the inside of the medium tube 53 will continue to heat up (the medium tube 53 can be filled with liquid medium with good thermal conductivity during production). When the temperature reaches a suitable level, the injection tube 9 descends into the middle tube 4, and the user starts the cylinder 12 to control the connecting rod 13 to make the upper mold 2 descend and the lower mold 3 close.

[0080] Step S2: The injection tube 9 must continue to descend during injection molding, so that the conical lifting tube 64 will fit closely with the bottom of the injection tube 9. As it continues to descend, the lifting tube 64 will slide inside the fixed tube 62 to compress the reset spring 63. At this time, the longitudinal rack 65 will follow the lifting tube 64 to descend and control the first gear 67 to rotate clockwise. The first gear 67 synchronously drives the second gear 68 to rotate. The second gear 68 engages to control the third gear 69 to rotate counterclockwise. The counterclockwise rotating third gear 69 will engage to control the transverse rack 610 to pull the movable plate 612 to move, thereby opening the fixed tube 62. In this way, the liquid mother particle will enter the lifting tube 64 from the injection tube 9 and then enter the lower mold 3 to complete the feeding and molding.

[0081] Step S3: the electric cylinder 72 controls the ejector tube 73 to drive the ejector block 75 to rise to eject the finished sole part inside the molding groove 15, and when the through hole 74 on the outer wall of the ejector tube 73 moves to the inside of the sleeve 76, the through hole 74 will overlap with the port of the external hose 77 (the external hose 77 can be connected to an external air pump). At this time, the external hose 77 can be quickly inflated from the ejector tube 73 into the ejector block 75, and then the rising pressure will eject the finished sole part and separate it from the lower mold 3, thereby realizing automatic unloading.

[0082] Step S4: The upper mold 2 continues to rise, and eventually the trigger plate 89 inside the upper mold 2 will contact the outer wall of the flip rack 87. Therefore, the rising trigger plate 89 will rise and drive the flip rack 87 to rise to control the compression of the second spring 88. Therefore, the flip rack 87 in the rising process will engage and drive the flip gear 810 to rotate counterclockwise. Therefore, the flip gear 810 rotating counterclockwise will synchronously drive the nozzle 811 to rotate in a counterclockwise arc. During the arc rotation, the nozzle 811 can spray the release agent inside the medium box 82 onto the lower mold 3 after the discharge is completed.

[0083] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A hot runner sole molding device, characterized in that: It includes a base, an upper mold, a lower mold, a heating component and an injection molding tube; Four limiting rods are fixedly arranged on the upper surface of the base, and a top plate is fixedly arranged on the outer walls of the four limiting rods. A cylinder is installed on the top of the top plate, and a connecting rod is installed on the output end of the cylinder. The bottom of the connecting rod is fixedly installed with the upper mold; A middle tube is installed inside the upper mold, the heating assembly includes a power supply installed on the outer wall of the upper mold, heating plates are attached to the outer walls of both sides of the middle tube, and a medium tube is fixed on the inner wall of the middle tube; A removal mechanism is installed inside the upper mold and below the middle tube, and the removal mechanism includes a sleeve fixed on the inner wall of the upper mold, a fixed tube is fixed on the inner wall of the sleeve, a return spring is placed inside the fixed tube, a lifting tube is fixed on the top of the return spring, a longitudinal rack is fixed on the outer wall of the lifting tube, a notch is opened on the outer wall of the sleeve, and the outer wall of the fixing tube is rotatably connected with the first gear and the third gear respectively, the second gear is connected with the keyway at the axis of the first gear, and the bottom of the third gear is meshedly connected with a transverse rack, a limiting plate is fixed on the bottom of the transverse rack, a movable plate is fixed on the bottom of the limiting plate, and an avoidance groove is opened at the bottom of the fixing tube.

2. A hot runner sole molding device according to claim 1, characterized in that: The power supply is electrically connected to the two heating plates, the medium pipe is in a spiral structure, and the limit plate is slidably connected to the inner wall of the fixed pipe.

3. A hot runner sole molding device according to claim 1, characterized in that: The lifting tube and the fixed tube are slidably connected, the longitudinal rack and the first gear are meshed with each other, and the second gear and the third gear are meshed with each other.

4. A hot runner sole molding device according to claim 1, characterized in that: It also includes a blanking mechanism, a molding groove is provided on the top of the lower mold, the blanking mechanism includes a mounting plate fixed to the inner wall of the lower mold, an electric cylinder is installed at the bottom of the mounting plate, two jacking pipes are installed at the output end of the electric cylinder, tops of the two jacking pipes are fixed with jacking blocks, outer walls of the two jacking pipes are provided with through holes, outer walls of the two jacking pipes and located at the inner top of the lower mold are fixed with sleeves, and outer walls of the two sleeves are installed with external hoses.

5. A hot runner sole molding device according to claim 4, characterized in that: The two top blocks are embedded in the inner bottom of the forming groove, and the two through holes are adapted to the inlets of the two external hoses.

6. A hot runner sole molding device according to claim 1, characterized in that: The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs. The cam is provided with a plurality of springs, each of which is provided with a plurality of springs. The cam is provided with a plurality of springs, each of which is provided with a plurality of springs. The cam is provided with a plurality of springs, each of which is provided with a plurality of springs. The cam is provided with a plurality of springs, each of which is provided with a plurality of springs. The cam is provided with a plurality of springs, each of which is provided with a plurality of springs.

7. A hot runner sole molding device according to claim 6, characterized in that: The second slide bar and the receiving plate are slidably connected, the top of the first spring is fixedly connected to the bottom of the positioning plate, and the upper and lower ends of the second spring are fixedly connected to the bottom of the receiving plate and the upper surface of the flip rack.

8. The hot runner sole molding device according to claim 6, characterized in that: The flip rack and the flip gear are meshed with each other, and the medium box is installed through a conveying hose and a nozzle seal.

9. A molding method for a hot runner sole molding device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1: preheating, start the power supply to continuously energize and heat the heating plate through the wire, the heating plates on both sides can quickly heat the outer wall of the central tube, and the inside of the medium tube will continue to heat up (the medium tube can be filled with liquid medium with good thermal conductivity during production). Step S2: Before injection molding, the injection tube descends into the middle tube, and the user activates the oil cylinder to control the connecting rod so that the upper mold descends and the lower mold closes. Step S3: The injection tube must continue to descend during injection molding, so that the tapered lifting tube will fit closely with the bottom of the injection tube. As it continues to descend, the lifting tube will slide inside the fixed tube to compress the reset spring. At this time, the longitudinal rack will follow the lifting tube to descend and control the first gear to rotate clockwise. The first gear synchronously drives the second gear to rotate, and the second gear engages to control the third gear to rotate counterclockwise. The counterclockwise rotating third gear will engage to control the transverse rack to pull the movable plate to move, thereby opening the fixed tube. In this way, the liquid masterbatch will enter the lifting tube from the injection tube and then enter the lower mold to complete the feeding and molding. Step S4: Cooling and discharging. After the automatic cooling is completed, the electric cylinder is started to control the top pipe to drive the top block to rise to eject the finished sole part inside the molding groove, and when the through hole on the outer wall of the top pipe moves to the inside of the sleeve, the through hole will coincide with the port of the external hose (the external hose can be connected to an external air pump). At this time, the external hose can be quickly inflated from the top pipe into the top block, and then the rising pressure will eject the finished sole part and separate it from the lower mold, thus realizing automatic unloading.

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